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 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, apparatus, and device. Background Art

[0002] To enhance the network-side capacity, the network side has introduced multiple access objects such as multi-carriers or multi-cells, and a terminal (User Equipment, UE) can randomly access one of the multiple access objects. Taking multi-carriers or multi-cells as an example, if a UE wants to randomly access a certain carrier / cell, it needs to first obtain the synchronization signal or Physical Broadcast Channel block (SSB) sent by the carrier / cell to obtain time-frequency synchronization; if a UE wants to initiate a random access on a certain carrier / cell, it needs to first obtain the System Information Block 1 (SIB) of the carrier / cell, because the RACH configuration is included in SIB1.

[0003] To reduce the power consumption of the network side, a carrier / cell can not send SSB / SIB, or does not perform RACH monitoring. However, if a carrier / cell does not send SSB and there is no carrier / cell configured as a synchronization reference for this carrier / cell, then this carrier / cell cannot allow the UE to perform random access either; if a carrier / cell does not send SIB and the UE does not obtain the SIB of this carrier from the remaining carriers / cells, then since the UE cannot obtain the RACH configuration on this carrier / cell, it can only aggregate on the carriers / cells with RACH configuration for random access, which will lead to an excessive load on the carriers / cells allowing random access; if a carrier / cell does not perform RACH monitoring, then an idle UE cannot perform random access on this carrier / cell either, and all of these will result in a reduction in the network-side capacity.

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

[0005] Embodiments of this application provide a random access, communication method, apparatus, and device to save network energy as much as possible on the premise of ensuring the network-side capacity.

[0006] In a first aspect, a random access method is provided, and the method includes:

[0007] 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;

[0008] According to the first information and a first rule, select a target access object for performing a first operation from the first access object and the second access object group, 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, and the method includes:

[0010] 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 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 device is provided, and the device 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;

[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 device is provided, and the device includes:

[0015] 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 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] Fifth aspect, a terminal is provided, which includes a processor and a memory. 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 method described in the first aspect are implemented.

[0017] Sixth aspect, a terminal is provided, 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. The processor is used to select a target access object for performing a first operation according to the first information and a first rule. The first operation includes camping or random access, and the access object includes one of a carrier, a cell, and a bandwidth part (BWP).

[0018] Seventh aspect, a network-side device is provided, which includes a processor and a memory. 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 method described in the second aspect are implemented.

[0019] Eighth aspect, a network-side device is provided, including a processor and a communication interface. The communication interface is used to send first information about a second access object group to a terminal through a first access object. The second access object group includes one or more second access objects different from the first access object. The first information is used for the terminal to select a target access object for performing a first operation. The first operation includes camping or random access, and the access object includes one of a carrier, a cell, and a bandwidth part (BWP).

[0020] Ninth aspect, a communication system is provided, including: 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 random access method described in the second aspect.

[0021] Tenth aspect, a readable storage medium is provided. Programs or instructions are stored on the readable storage medium. When the programs 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] Eleventh aspect, a chip is provided. The chip 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 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 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, 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 It is a block diagram of a wireless communication system provided by an embodiment of the present application.

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

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

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

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

[0030] Figure 6 It is a schematic flowchart of a random access process provided by an embodiment of the present application.

[0031] Figure 7 It is a schematic flowchart of a random access process provided by another embodiment of the present application.

[0032] Figure 8 It is a schematic flowchart of a communication method provided by an embodiment of the present application.

[0033] Figure 9 It is a schematic structural diagram of a random access device provided by an embodiment of the present application.

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

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

[0039] Figure 15 Schematic hardware structure diagram of the terminal in the embodiment of the present application.

[0040] Figure 16 Schematic hardware structure diagram of the network-side device in the embodiment of the present application. Detailed implementation manners

[0041] Next, the technical solutions in the embodiments of the present application will be clearly described with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. According to the embodiments in the present application, every other embodiment obtained by those of ordinary skill in the art shall fall within the protection scope of the present application.

[0042] 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 different from those illustrated or described herein, and the objects distinguished by "first" and "second" are generally of the same type, and the number of objects is not limited. For example, the first 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.

[0043] It should be noted that the technology described in the embodiments of this application is not limited to Long Term Evolution (LTE) / LTE-Advanced (LTE-A) systems, but can also be used in other wireless communication systems, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single-carrier Frequency Division Multiple Access (SC-FDMA), and other systems. The terms "system" and "network" in the embodiments of this 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.

[0044] 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. Terminal-side devices. Wearable devices include: smart watches, smart bracelets, smart earphones, smart glasses, smart jewelry (smart bracelets, smart bracelets, smart rings, smart necklaces, smart anklets, smart ankle chains, etc.), smart wristbands, 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 specific technical terms. 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.

[0045] In order to save energy on the network side while ensuring the network side capacity 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.

[0046] First, a random access method proposed by the embodiments of the present application will be described.

[0047] As Figure 2 shown, a random access method proposed by the embodiments of the present application may include:

[0048] 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.

[0049] 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.

[0050] 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.

[0051] 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 send SSB (SSB-less carrier), or the second access object is a carrier that supports on-demand sending of SSB (on-demand SSB carrier).

[0052] 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.

[0053] A random access method provided by an embodiment of this application is applicable to a scenario where a network-side device does not configure system information block (SIB) of a second access object on a first access object or only configures a part of SIBs (that is, the first information does not include the SIB of the second access object or only includes a part of the SIB of the second access object). These scenarios may include:

[0054] Scenario 1: The first access object is configured with wake-up signal (WUS) configuration information for triggering each second access object in a second access object group to send SIBs. All second access objects in the second access object group normally send synchronization signal blocks (SSBs) and perform normal random access channel (RACH) monitoring, but do not send SIB1 (the sending of SIB1 requires WUS triggering).

[0055] Scenario 2: The first access object is configured with WUS configuration information for triggering each second access object in a second access object group to send SIBs. All second access objects in the second access object group do not send SSBs, and with the first access object as the reference access object, all perform normal RACH monitoring and do not send SIB1 (the sending of SIB1 requires WUS triggering).

[0056] Scenario 3: The first access object is configured with WUS configuration information for triggering a second access object group to send SSBs and SIB1. All second access objects in the second access object group do not send SSBs, all perform normal RACH monitoring, and do not send SIB1 (the sending of SIB1 requires WUS triggering).

[0057] Scenario 4: The first access object is configured with WUS configuration information for triggering a second access object group to send SIB1 and perform RACH monitoring. All second access objects in the second access object group either send SSBs or do not send SSBs (with the first access object as the reference access object), all do not perform normal RACH monitoring, and do not send SIB1 (the sending of SIB1 requires WUS triggering).

[0058] Scenario 5: The first access object is configured with WUS configuration for triggering a second access object group to send SSBs, SIB1, and perform RACH monitoring. All second access objects in the second access object group do not send SSBs, all do not perform normal RACH monitoring, and do not send SIB1 (the sending of SIB1 requires WUS triggering).

[0059] Wherein, the first information can be sent by the first access object through a broadcast message; or, by default, the first information is the same as the corresponding information of the first access object.

[0060] The first information corresponds to at least one second access object in the second access object group, and the first information may include at least one of the following:

[0061] 1) triggering the at least one second access object to send a wake-up signal WUS configuration information of an SSB, or triggering the at least one second access object's SSB adaptive adjustment WUS configuration information, wherein the SSB includes at least one of a synchronization signal block and a physical broadcast channel block;

[0062] 2) triggering the at least one second access object to send WUS configuration information of the SIB, or triggering the WUS configuration information of the SIB adaptive adjustment of the at least one second access object;

[0063] 3) WUS configuration information for triggering random access channel RACH monitoring of the at least one second access object, or WUS configuration information for triggering RACH monitoring adaptive adjustment of the at least one second access object;

[0064] 4) The configuration information related to the SSB currently being sent by the at least one second access object may specifically include at least one of the following:

[0065] whether the at least one second access object is sending an SSB;

[0066] At least one of the frequency of the SSB being sent by the at least one second access object, the SSB sending period, and the number of SSBs in a sending period;

[0067] The at least one second access object is sending a transmission mode of the SSB, and the transmission mode includes one of a normal transmission mode, a power-saving transmission mode, a compact transmission mode, a long-cycle transmission mode (the transmission cycle of SSB is long) and an on-demand transmission mode, wherein the power-saving transmission mode can be a simplified transmission mode that only sends a primary synchronization signal (Primary Synchronization Signal, PSS) and a secondary synchronization signal (Secondary Synchronization Signal, SSS), and the compact transmission mode can be a transmission mode in which there is no time domain gap between multiple SSBs.

[0068] 5) The configuration information related to the SIB currently being sent by the at least one second access object may specifically include at least one of the following:

[0069] whether the at least one second access object sends a SIB;

[0070] a sending period of the SIB being sent by the at least one second access object;

[0071] Configuration information of at least one of the physical downlink control channel (PDCCH) and control resource set associated with the system information block (SIB) being sent by the at least one second access object;

[0072] The transmission mode of the SIB being sent 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 (long SIB transmission period), and an on-demand transmission mode. Among them, the energy-saving transmission mode can be a simplified transmission mode that only sends 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 SIB1s.

[0073] 6) Configuration information related to the random access channel (RACH) listening behavior of the at least one second access object currently, which may specifically include at least one of the following:

[0074] Whether the at least one second access object performs RACH listening;

[0075] 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;

[0076] 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 random access opportunity (RO) transmission occasion), a compact listening mode, and an on-demand listening mode. Among them, the simplified listening mode may include a reduced random access opportunity (RO) transmission occasion, 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.

[0077] 7) Configuration information related to the synchronization signal block (SSB) sent after being successfully triggered by the wake-up signal (WUS), which may specifically include at least one of the following:

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

[0079] After the successful triggering of WUS, the at least one second access object sends a listening window for SSB, that is, the UE listens for SSB within this listening window;

[0080] After the successful triggering of WUS, the at least one second access object actually sends at least one time-domain resource index or the position of at least one time-domain resource of the SSB;

[0081] After the successful triggering of 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 transmission times, and the number of SSB transmission periods;

[0082] After the successful triggering of WUS, the relative relationship of 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;

[0083] After the successful triggering of WUS, the time-domain resource position of the first SSB or the first SIB 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;

[0084] After the successful triggering of WUS, the transmission mode of the SSB sent by the at least one second access object, and the transmission mode includes one of normal transmission mode, energy-saving transmission mode (such as only sending PSS and SSS), aggregation transmission mode (such as no time-domain interval between multiple SSBs), long-period transmission mode (longer SSB period), and on-demand transmission mode.

[0085] 8) Configuration information related to the SIB sent after the successful triggering of WUS, which may specifically include at least one of the following:

[0086] After the successful triggering of WUS, the transmission period of the SIB sent by the at least one second object, and the configuration information of at least one of the Physical Downlink Control Channel (PDCCH) and Control Resource Set (CORESET) carrying the scheduling information of this SIB;

[0087] After the successful triggering of WUS, the listening window for the SIB sent by the at least one second object, that is, the UE listens for the SIB within this listening window;

[0088] After the successful triggering of WUS, one of the transmission time length, number of transmissions, and number of transmission periods of the SIB sent by the at least one second object, such as one of the transmission time length, number of transmissions, and number of transmission periods of SIB1;

[0089] After the successful triggering of WUS, the at least one second object sends the frequency-domain resource information of the SIB, where the frequency-domain resource information includes at least one of the starting position of the frequency-domain resource (e.g., the carrier, BWP, or the position in the frequency band where it is located), the number of frequency bands occupied by the frequency-domain resource, and the bandwidth size of the signal.

[0090] After the successful triggering of WUS, the at least one second object sends the time-domain resource information of the SIB, where the time-domain resource information includes at least one of the time-domain resource position (e.g., the offset relative to the synchronization / broadcast channel), the size of the listening window, the period of the listening window, the number of times of time-domain repeated transmission, and the time-domain repeated transmission mode.

[0091] After the successful triggering of WUS, the at least one second object sends the transmission mode of the SIB, where the transmission mode includes one of the normal transmission mode, the energy-saving transmission mode, the aggregation transmission mode, the long-period transmission mode, and the on-demand transmission mode. Among them, the energy-saving transmission mode can be a simplified transmission mode that only sends core configuration information such as RACH, and the aggregation transmission mode can be a transmission mode where there is no time-domain gap between multiple SIB1s.

[0092] 9) The relevant configuration information for RACH listening after the successful triggering of WUS, which can specifically include:

[0093] After the successful triggering of WUS, the at least one second access object listens to at least one of the period of RACH, the number of RACHs listened to, the frequency-domain resource configuration information of RACH listening, the time-domain resource configuration information of RACH listening, and the listening mode of RACH listening. Among them, the listening mode includes one of the normal listening mode, the simplified listening mode (e.g., reducing the RO opportunity), the aggregation listening mode (no time-domain gap between multiple ROs), and the on-demand listening mode.

[0094] 10) The characteristic information of the at least one second access object, which can specifically include at least one of the following:

[0095] The identification information of the at least one second access object;

[0096] Whether the at least one second access object can use the first access object as a reference access object;

[0097] Whether the at least one second access object is co-located with the first access object;

[0098] Whether the at least one second access object is in the same Timing Advance Group (TAG) as the first access object;

[0099] Whether the at least one second access object has a Quasi CoLocation (QCL) relationship with the first access object;

[0100] The reference access object of the at least one second access object;

[0101] The access object co-located with the at least one second access object;

[0102] The access object in the same TAG as the at least one second access object;

[0103] The access object having a QCL relationship with the at least one second access object;

[0104] Whether the at least one second access object is in the barred state;

[0105] The priority of the at least one second access object when the UE performs random access channel selection;

[0106] Whether the at least one second access object is set to the barred state for a 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;

[0107] 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;

[0108] Whether the at least one second access object supports UE residency;

[0109] Whether the at least one second access object is a suitable cell;

[0110] Whether the at least one second access object supports cell selection and / or cell reselection;

[0111] Part of the system information of the at least one second access object, where the part of the system information includes 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.

[0112] Among them, the WUS configuration information included in the first information may include at least one of the following:

[0113] 1) Synchronization reference configuration information of WUS, which may specifically include at least one of the following:

[0114] At least one of the SSB, Channel State Information-Reference Signal (CSI-RS), and tracking reference signal (TRS) of the first access object;

[0115] GPS timing.

[0116] 2) Resource configuration information of WUS, which may specifically include at least one of the following:

[0117] Time-domain resource information;

[0118] Frequency-domain resource information;

[0119] Signal sequence configuration information, for example, preamble grouping, which may 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.

[0120] 3) Power configuration information of WUS, which may specifically include at least one of the following:

[0121] Initial signal power;

[0122] Signal power ramp step.

[0123] 4) Repetition transmission configuration information of WUS, which may specifically include at least one of the following:

[0124] Number of repetitions for a single signal transmission;

[0125] Maximum number of repetitions for channel transmission.

[0126] 5) Spatial domain parameter configuration information of WUS, which may specifically include at least one of the following:

[0127] Correspondence between WUS and the SSB of the first access object;

[0128] Correspondence between WUS and the SSB of the at least one second access object;

[0129] Correspondence between WUS and the SSB of the second access object group.

[0130] 6) Configuration information of the transmission timer for WUS. The timer is used to avoid overly frequent WUS transmissions. Generally, the timer is started after WUS is transmitted, and repeated WUS transmissions are not allowed before the timer expires.

[0131] Among them, the form of the WUS signal includes at least one of the following:

[0132] RACH;

[0133] Msg1;

[0134] Preamble sequence;

[0135] Sounding Reference Signal (SRS);

[0136] Physical Uplink Control Channel (PUCCH).

[0137] Among them, the configuration method of the resource configuration information of the WUS includes at least one of the following:

[0138] 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. One element in the signal resource list includes one or more resources;

[0139] 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;

[0140] 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. The resource number is determined according to at least one of time domain, frequency domain, and spatial domain;

[0141] Configure one or more signal resources for the second access object or the second access object group in the first information.

[0142] Among them, the signal resources configured by the resource configuration information of the WUS include at least one of the following:

[0143] 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, it shares the same video resource as the common RACH on the first access object;

[0144] The time-frequency resource is the time-frequency resource of a dedicated RACH specifically used for triggering SSB / SIB transmission and / or RACH listening on the first access object or the second access object group. 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;

[0145] The time-frequency resource is the time-frequency resource of a dedicated SRS / PUCCH used for triggering SSB / SIB transmission and / or RACH listening on the first access object or the second access object group.

[0146] Among them, the grouping method of the second access object group includes at least one of the following:

[0147] Configured by the network-side device;

[0148] Specified by the protocol.

[0149] Among them, the grouping rules of the second access object group include at least one of the following:

[0150] The second access objects in the same frequency band (band) are grouped as one group;

[0151] The second access objects in the same frequency band interval are grouped as one group;

[0152] The second access objects with at least one of the Initial BWP, active BWP, SSB, and SCS being the same are grouped as one group;

[0153] The second access objects with the same transmission mode are grouped as one group, where the transmission mode is related to at least one of the following: whether to send SSB, whether to perform RACH listening, and whether to support on-demand SSB, etc.;

[0154] The co-located second access objects are grouped as one group;

[0155] The second access objects with the same SSB transmission period are grouped as one group.

[0156] 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, and the access object includes one of a carrier, a cell, and a bandwidth part (BWP).

[0157] Among them, the first rule can be related to at least one of the following:

[0158] One or more access objects that can be randomly accessed by the terminal indicated or configured by the network-side device;

[0159] By default, the access object to which the terminal is to randomly access is the first access object;

[0160] The Bar status information of the second access object;

[0161] The index value of the second access object;

[0162] The center frequency of the second access object;

[0163] The subcarrier spacing (SCS) of the second access object;

[0164] The identifier of the second access object;

[0165] The frequency interval between the second access object and the first access object;

[0166] Whether the second access object performs normal RACH listening;

[0167] Whether the second access object normally sends SSB;

[0168] Whether the second access object normally sends SIB;

[0169] Whether the second access object meets at least two of normal RACH listening, normal SSB sending, and normal SIB sending;

[0170] The number of times of WUS to be sent to the second access object;

[0171] The priority of the second access object;

[0172] The signal strength measurement 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);

[0173] Randomly generated access object index;

[0174] The weight value of the second access object;

[0175] Randomly generated access object weight value;

[0176] Whether the first access object is a suitable cell;

[0177] Whether the second access object is a suitable cell.

[0178] 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:

[0179] ① The transmission mode of the second access object, where the transmission mode includes whether to normally transmit the SSB, whether to support on-demand transmission of the SSB, and whether to normally listen to the RACH. For example, the relationship between the priority of the second access object and the transmission mode can be:

[0180] The priority of the second access object that normally transmits the SSB > the priority of the second access object that does not transmit the SSB with the first access object as a reference > the priority of the second access object that transmits the SSB on demand;

[0181] The priority of the second access object that normally transmits the SIB > the priority of the second access object that transmits the SIB on demand;

[0182] The priority of the second access object that normally listens to the RACH > the priority of the second access object that listens to the RACH on demand.

[0183] ② The frequency band interval size between the second access object and the first access object;

[0184] ③ The number of the second access object.

[0185] Next, two examples are given to illustrate how to select 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 in step 202. 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.

[0186] The first example

[0187] 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:

[0188] Determine whether the first access object is a suitable cell;

[0189] When the first access object is a suitable cell, select the first access object as the target access object;

[0190] When the first access object is not a suitable cell, perform one of the first step, the second step, and the third step.

[0191] Among them, the first step includes:

[0192] Determine whether the at least one second access object is a suitable cell according to the reference signal measurement results corresponding to at least one second access object in the second access object group and the system information SIB sent by the at least one second access object triggered by the WUS;

[0193] In the case that 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.

[0194] Wherein, the second step includes:

[0195] Determine whether the at least one second access object is a suitable cell according to the reference signal measurement results corresponding to at least one second access object in the second access object group and the partial SIB of the at least one second access object included in the first information;

[0196] In the case that 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 according to the first rule, and in the case that the terminal does not obtain the SIB of the suitable cell, send a WUS triggering the SIB transmission to the suitable cell, and use the suitable cell as the target access object for performing the first operation after receiving the SIB.

[0197] Wherein, the third step includes:

[0198] Ignore the second access object and find other suitable cells as the target access objects for the operation to be performed.

[0199] Further, the finding of other suitable cells as the target access objects for performing the first operation may include:

[0200] Find a suitable cell from one or more second access objects in the second access object group as the target access object for the operation to be performed;

[0201] Find a suitable cell from one or more third access objects in the third access object group as the target access object for the operation to be performed, wherein the third access object group includes access objects that meet the third condition;

[0202] Wherein, the third condition includes at least one of the following:

[0203] Taking the first access object as a reference;

[0204] Co-located with the first access object;

[0205] Continuous access objects on the same frequency band as the first access object.

[0206] The second example

[0207] 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 may include: performing a fourth step or a fifth step.

[0208] Wherein, the fourth step includes:

[0209] Determining whether the first access object is a suitable cell according to the reference signal measurement result of the first access object and the system information SIB of the first access object;

[0210] 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 of at least one second access object in the second access object group and the partial SIB of at least one second access object included in the first information;

[0211] 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, selecting a suitable cell from the first access object and the at least one second access object according to the first rule;

[0212] If the suitable cell is the first access object, using the suitable cell as the target access object for performing the first operation;

[0213] If the suitable cell is a second access object, sending a WUS for triggering SIB transmission to the suitable cell, and using the suitable cell as the target access object for performing the first operation after receiving the SIB.

[0214] Wherein, the fifth step includes:

[0215] Determining whether the first access object is a suitable cell according to the reference signal measurement result of the first access object and the SIB of the first access object;

[0216] 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 of at least one second access object in the second access object group and the SIB sent by at least one second access object triggered by WUS;

[0217] When the first access object is a suitable cell and one or more of the at least one second access objects are suitable cells, a suitable cell is selected from the first access object and the at least one second access object according to the first rule as the target access object for performing the first operation.

[0218] In the embodiments 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, the SSB measurement is directly performed on the second access object to obtain the SSB measurement result; if there is no SSB sent on the second access object, the SSB measurement result sent on the fourth access object is used as the SSB measurement result of the second access object, 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, the measurement result of the SSB sent by the second access object after the WUS trigger is successful is used as the SSB measurement result of the second access object.

[0219] 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 terminal can select the target access object for 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, but sending SSB / SIB 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.

[0220] Optionally, when the target access object belongs to the second access object group, the first information includes the WUS configuration information for triggering the at least one second access object to send SSB / SIB, or the WUS configuration information for triggering the adaptive adjustment of SSB / SIB of the at least one second access object, and the first information includes the WUS configuration information for triggering the random access channel RACH listening of the at least one second access object, or the WUS configuration information for triggering the adaptive adjustment of RACH listening of the 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 the embodiments of the present application may further include:

[0221] 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 a Synchronization Signal Block (SSB), a System Information Block (SIB), and a Random Access Channel (RACH) monitoring.

[0222] 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.

[0223] Wherein, the first condition may include at least one of the following:

[0224] 1) The first access object is not a suitable cell;

[0225] 2) The target access object is a suitable cell;

[0226] 3) Performing intra-frequency or inter-frequency measurement on the target access object;

[0227] 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 monitoring 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 RACH monitoring (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;

[0228] 5) The terminal is sensitive to access latency;

[0229] 6) The terminal is in the process of recovering from a link failure.

[0230] In another example, before sending the WUS for the target access object, the method may further include: the terminal assumes that the target access object is in a second energy-saving state.

[0231] Wherein, the second energy-saving state may include at least one of the following:

[0232] Not sending an SIB, normally sending an SSB, and performing normal RACH monitoring;

[0233] Not sending an SIB, not sending an 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;

[0234] Not sending an SIB, normally sending an SSB, and not performing normal RACH monitoring;

[0235] 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;

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

[0237] Send SIB, do not send SSB or send energy-saving SSB, and do not perform normal RACH monitoring;

[0238] Send SIB, send SSB normally, and perform normal RACH monitoring;

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

[0240] Wherein, the energy-saving SSB includes one of lightweight SSB, simplified SSB, sparse SSB, and long-period SSB.

[0241] In the first example, the terminal sending a WUS for the target access object may include: the terminal sending 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 / or send SIB, and the other is to trigger the target access object to monitor RACH.

[0242] In the second example, the terminal sending a 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 / or send SIB; 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.

[0243] 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:

[0244] After Z time slots / symbols / milliseconds of sending the first WUS, the terminal starts to send the second WUS for the target access object;

[0245] 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;

[0246] After Y time slots / symbols / milliseconds after receiving the first SSB or the first SIB sent by the successfully triggered target access object, the terminal starts to send the second WUS for the target access object;

[0247] When the number of transmissions of the first WUS reaches the maximum value, the terminal sends the second WUS for the target access object;

[0248] After starting the first timer after sending the first WUS, after the first timer expires, the terminal sends the second WUS for the target access object.

[0249] Figure 3 A random access method provided by the illustrated embodiment can trigger the second access object to send SSB / SIB or perform RACH monitoring on demand, rather than continuously sending SSB / SIB or continuously performing RACH monitoring, nor not sending SSB / SIB or not performing RACH monitoring all the time. Therefore, while saving energy for the network side device, the capacity of the network side can be guaranteed to the greatest extent.

[0250] Optionally, when the WUS is used to trigger the sending of SSB / SIB, as Figure 4 shown, a random access method provided by an embodiment of the present application may further include:

[0251] The terminal monitors the SSB / SIB sent by the target access object.

[0252] 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 monitor the position of the SSB / SIB. Specifically, when the UE sends one WUS for the target access object, the UE monitors the position of the SSB / SIB after sending the WUS; when the UE sends two WUSs (the first WUS and the second WUS above) for the target access object, the UE can monitor the position of the SSB / SIB after sending the first WUS.

[0253] Specifically, the terminal monitoring the SSB sent by the target access object (the time point of monitoring the SSB sent by the target access object) may specifically include one of the following:

[0254] After starting the third timer after sending the WUS, after the third timer expires, the terminal starts to monitor the SSB / SIB sent by the target access object;

[0255] After C time slots / symbols / milliseconds after sending the WUS, the terminal starts to listen for the SSB / SIB sent by the target access object;

[0256] In the next time slot after sending the WUS, the terminal starts to listen for the SSB / SIB sent by the target access object;

[0257] Within the SSB listening window configured in the first information, the terminal listens for the SSB / SIB sent by the target access object.

[0258] Figure 4 A random access method 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 at the target access object and increasing the capacity on the network side.

[0259] Optionally, as Figure 5 shown, a random access method provided by an embodiment of the present application may further include:

[0260] Step 205, the terminal initiates the first operation to the target access object.

[0261] When 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; when the UE sends two WUSs (the first WUS and the second WUS) to the target access object, the UE may initiate the first operation to the target access object after sending the second WUS. 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:

[0262] 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 transmission and RACH listening, or the second WUS);

[0263] 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 transmission and RACH listening, or the second WUS);

[0264] 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 a RACH. Correspondingly, the WUS can be the same WUS for triggering SSB transmission and RACH listening, or the second WUS mentioned above).

[0265] Optionally, a random access method provided by an embodiment of the present application may further include:

[0266] When the second condition is met, the terminal sends the WUS for the target access object again.

[0267] Wherein, the second condition may include but is not limited to at least one of the following:

[0268] 1) SSB detection fails;

[0269] 2) The number of random access attempts reaches the maximum value;

[0270] The number of WUS transmissions is less than or equal to the preset maximum number of transmissions;

[0271] 3) No feedback for the previous WUS is received;

[0272] 4) The previous WUS is used to trigger the transmission of SSB / SIB. After receiving the feedback for the previous WUS signal, the WUS for triggering RACH listening is sent again (that is, sending the WUS again is to trigger RACH listening);

[0273] 5) No feedback for the previous WUS is received before the timer times out.

[0274] Optionally, the re - sent WUS signal has at least one of the following characteristics:

[0275] 1) The signal power increases;

[0276] 2) The time interval from the previous WUS transmission is greater than the preset time interval;

[0277] 3) The frequency - domain resources and sequence resources are the same as those of the previous WUS.

[0278] It should be noted that in the embodiments of the present application, the expressions such as triggering SSB (trigger SSB) transmission, triggering SSB adaptation adjustment (trigger SSB adaptation), triggering normal SSB (trigger normal SSB) transmission, and triggering SSB to return to the normal transmission mode have the same meaning, all indicating triggering the second access object to change from an abnormal SSB transmission mode (long-period SSB transmission mode, simplified SSB transmission mode, or on-demand SSB mode) to a normal SSB transmission mode.

[0279] 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.

[0280] Next, a specific embodiment is used to illustrate the application of a random access method provided in the embodiments of the present application.

[0281] Embodiment 1

[0282] Assume that: The terminal obtains the first information about the second carriers Cell1, Cell2, and Cell3 on the first carrier Cell 0 that is running.

[0283] In the scenario 1 mentioned above (the second carrier normally sends SSB, performs normal RACH monitoring, and does not normally send SIB1), the first carrier is configured with the WUS configuration information for triggering each second carrier in the second carrier group to send SIB. All second carriers in the second carrier group normally send SSB and perform normal RACH monitoring, but do not normally send SIB1. Specifically:

[0284] Cell 0: Belongs to band0, normally sends SSB and SIB1, and is configured with the WUS configuration information for triggering Cell1, Cell2, and Cell3 to send SIB1;

[0285] Cell 1: Belongs to Band 1, normally sends SSB, and performs normal RACH monitoring, and does not send SIB1

[0286] Cell 2: Belongs to Band 2, normally sends SSB, and performs normal RACH monitoring, and does not send SIB1

[0287] Cell 3: Belongs to Band 3, normally sends SSB, and performs normal RACH monitoring, and does not send SIB1

[0288] In some embodiments, the first information about the second carrier group sent by the network side device through the first carrier may include at least one of the following:

[0289] 1) WUS configuration information for triggering at least one second carrier to send SIB or perform SIB adaptation adjustment;

[0290] 2) Configuration information related to the SSB currently being sent by at least one second carrier, which may specifically include at least one of the following:

[0291] Whether at least one second carrier is sending SSB;

[0292] At least one of the frequency point of the SSB being sent by at least one second carrier, the SSB transmission period, and the number of SSBs within one transmission period;

[0293] The transmission mode of the SSB being sent by at least one second carrier, where the transmission mode includes one of the 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 can be a simplified transmission mode that only sends 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.

[0294] 3) Configuration information related to the SIB sent after successful triggering by WUS, which may specifically include at least one of the following:

[0295] After successful triggering by WUS, the transmission period of the at least one second object sending SIB, and the configuration information of at least one of the Physical Downlink Control Channel (PDCCH) and the Control Resource Set (CORESET) carrying the scheduling information of this SIB;

[0296] After successful triggering by WUS, the listening window for the at least one second object to send SIB, that is, the UE listens for SIB within this listening window;

[0297] After successful triggering by WUS, one of the transmission time length, number of transmissions, and number of transmission periods of the at least one second object sending SIB, such as one of the transmission time length, number of transmissions, and number of transmission periods of SIB1;

[0298] After the WUS is successfully triggered, the at least one second object sends the frequency domain resource information of the SIB, where the frequency domain resource information includes at least one of the starting position of the frequency domain resource (for example, the carrier, BWP, or the position of the frequency band), the number of frequency bands occupied by the frequency domain resource, and the bandwidth size of the signal;

[0299] After the WUS is successfully triggered, the at least one second object sends the time domain resource information of the SIB, where the time domain resource information includes at least one of the time domain resource position (for example, relative to the offset between the synchronization / broadcast channel), the size of the listening window, the period of the listening window, the number of time domain repeated transmissions, and the time domain repeated transmission mode;

[0300] After the WUS is successfully triggered, the at least one second object sends a transmission mode of the SIB, and the transmission mode includes one of a normal transmission mode, an energy-saving transmission mode, an aggregated transmission mode, a long-cycle transmission mode, and an on-demand transmission mode. Among them, the energy-saving transmission mode can be a simplified transmission mode that only sends core configuration information such as RACH, and the aggregated transmission mode can be a transmission mode in which there is no time domain gap between multiple SIB1s.

[0301] 4) characteristic information of at least one second carrier itself, which may specifically include at least one of the following:

[0302] whether at least one second carrier is in a barred (Bar) state;

[0303] a priority of at least one second carrier when the UE performs random access channel selection;

[0304] whether at least one second carrier is set to a Bar state for a first type of UE, wherein the first type includes at least one of a reduced capability (Redcap), a non-terrestrial network (NTN), and support for a network energy saving (NES) function;

[0305] A characteristic value N of a UE ID for which random access is allowed on at least one second carrier, for example, a UE with UE ID mod number of carriers = N can perform random access on the carrier;

[0306] whether the at least one second carrier supports UE camping;

[0307] Whether the at least one second carrier is a suitable cell;

[0308] whether the at least one second carrier supports cell selection and / or cell reselection;

[0309] Partial system information of at least one second carrier, where the partial system information includes 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.

[0310] In some embodiments, when performing cell selection for the first operation, although there is a special carrier (a second carrier that has obtained information from the first carrier), the first carrier is still preferentially selected.

[0311] 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 Wake-up Signal (WUS), and selects the first carrier for camping (monitor paging).

[0312] If the first carrier is determined not to be a suitable cell, at least one of the following operations is performed:

[0313] ■ First send a WUS, and judge according to the triggered System Information Block 1 (SIB1) and Synchronization Signal Block (SSB) measurement results: The UE selects one or more carriers in the second carrier group according to the first rule to send the corresponding WUS and receive SIB1, and judges whether the one or more carriers are suitable cells according to the SSB measurement results and SIB1 information.

[0314] ◆ If at least one carrier is a suitable cell, the UE selects one of the carriers for camping (monitor paging) according to the first rule.

[0315] ■ Judge according to partial SIB1 information and SSB measurement results, and then send a WUS after judgment: The UE selects one or more carriers in the second carrier group as target cells according to the first rule, and judges whether the one or more carriers are suitable cells according to the information corresponding to the carrier (such as relevant configuration information of cell selection or cell reselection).

[0316] ◆ If at least one carrier is a suitable cell, the UE selects one of the carriers according to the first rule, sends a WUS to it, and camps (monitor paging) on the carrier after obtaining SIB1.

[0317] ■ The UE ignores the second carrier group and seeks other suitable cells.

[0318] It should be noted that the reference signal corresponding to a second carrier may include at least one of reference signals such as SSB, CSI-RS, DRS and TRS. And when the reference signal is SSB, for a second carrier, if SSB is sent on the second carrier, SSB measurement is directly performed on the second carrier to obtain the SSB measurement result; if SSB is not sent on the second carrier, the SSB measurement result sent on the fourth carrier is used as the SSB measurement result of the second carrier, wherein the fourth carrier may include a reference carrier configured for the second carrier, a carrier co-located with the second carrier, and a carrier located in the same frequency band as the second carrier and continuous with each other, or, if SSB is not sent on the second carrier, the measurement result of SSB sent by the second carrier after the WUS is successfully triggered is used as the SSB measurement result of the second carrier (the same below, no further details).

[0319] Optionally, in some embodiments, the UE performs at least one of the following to determine a target carrier for performing the first operation:

[0320] ■The UE selects the first carrier and one or more carriers in the second carrier group according to the first rule: for the first carrier, determines whether it is a suitable cell according to the SSB measurement result and the SIB1 configuration; for the carriers in the second carrier group, sends the corresponding WUS and receives SIB1, and determines whether the one or more second carriers are suitable cells according to the SSB measurement result and SIB1;

[0321] ◆If at least one carrier is a suitable cell, the UE selects one of the carriers for monitor paging according to the first rule.

[0322] ■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, determines whether it is a suitable cell based on the SSB measurement result and the SIB1 configuration; for the carriers in the second carrier group, determines whether the one or more second carriers are suitable cells based on the information corresponding to the carrier (for example, configuration information related to cell selection or cell reselection) and the SSB measurement result.

[0323] ◆If at least one carrier is a suitable cell, the UE selects one of the carriers according to the first rule: if the carrier is the first carrier, it directly resides on the first carrier; if the carrier is a carrier of the second carrier group, it sends a WUS to it, obtains SIB1 and then resides on the carrier (monitor paging).

[0324] In some embodiments, for a UE residing on a first carrier, intra-frequency and inter-frequency measurements are performed according to the configuration information of the first carrier, and if a second carrier in the second carrier group is determined as a highest ranked cell or a target cell for cell reselection, the UE performs at least one of the following to determine a target carrier for performing the first operation:

[0325] ■ Sending a WUS to the second carrier to trigger the second carrier to send SIB1, and after the UE obtains SIB1, it determines whether the cell is a suitable cell;

[0326] ◆If it is a suitable cell, the UE performs cell reselection and resides in the cell;

[0327] ■ Determine whether the cell is a suitable cell. If it is a suitable cell, send WUS to obtain SIB1, then perform cell reselection and stay in the cell.

[0328] In some embodiments, for a UE residing on the first carrier, if there is a need for random access, the UE directly initiates a RACH on the first carrier for random access by default.

[0329] In some embodiments, for a UE residing on the first carrier, if there is a need for random access, the UE selects a target carrier for random access from the first carrier and the second carrier group according to a first rule:

[0330] 1) If the selected target carrier is the first carrier, RACH is directly initiated for random access;

[0331] 2) If the selected target carrier is a carrier of the second carrier group, a WUS is first sent to the carrier to obtain SIB1, and then a RACH is initiated on the carrier for random access according to the configuration information of the SIB1.

[0332] In some embodiments, the first rule includes: the UE screens out a target carrier that meets a condition, and the condition includes at least one of the following:

[0333] The target carrier is not in the bar state for the UE;

[0334] The RSRP / RSRQ measured on the target carrier meets certain conditions, such as being greater than or equal to a threshold;

[0335] The target carrier is a suitable cell for the UE.

[0336] 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:

[0337] Randomly select a target carrier;

[0338] 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;

[0339] The network side indicates / configures the target carrier for which the UE is to perform random access;

[0340] Select the carrier with the largest or smallest carrier index as the target carrier;

[0341] Select the carrier with the largest or smallest or intermediate center frequency as the target carrier;

[0342] Select the carrier with the largest or smallest SCS as the target carrier;

[0343] Select the second carrier with the smallest frequency interval from the first carrier as the target carrier;

[0344] Select the carrier that requires the fewest number of WUS transmissions as the target carrier;

[0345] Select the carrier with the highest priority as the target carrier;

[0346] Select the carrier with the largest RSRP / SINR measurement value of the reference signal as the target carrier.

[0347] In the scenario 2 mentioned above (the second carrier does not send SSB (there is a reference carrier), performs normal RACH monitoring, and does not send SIB1 normally), the first carrier is configured with WUS configuration information for triggering the second carriers in the second carrier group to send SIB. At least one of the second carriers in the second carrier group does not send SSB, performs normal RACH monitoring, but does not send SIB1 normally. Specifically:

[0348] Cell 0: Belongs to band0, normally sends SSB, and is configured with WUS configuration information for triggering Cell1, Cell2, and Cell3 to send SIB;

[0349] Cell 1: Belongs to Band 1, does not send SSB (referencing the first carrier), and performs normal RACH monitoring, does not send SIB1;

[0350] Cell 2: Belongs to Band 2, normally sends SSB, and performs normal RACH monitoring, does not send SIB1

[0351] Cell 3: Belongs to Band3, does not send SSB (referencing Cell2), and performs normal RACH monitoring without sending SIB1.

[0352] In some embodiments, the first information about the second carrier group sent by the network-side device through the first carrier may include at least one of the following:

[0353] 1) WUS configuration information for triggering at least one second carrier to send SIB or perform SIB adaptation adjustment;

[0354] 2) Configuration information related to the SSB currently being sent by at least one second carrier, which may specifically include at least one of the following:

[0355] Whether at least one second carrier is sending SSB;

[0356] At least one of the frequency point of the SSB being sent by at least one second carrier, the SSB transmission period, and the number of SSBs within one transmission period;

[0357] The transmission mode of the SSB being sent by at least one second carrier, where the transmission mode includes one of the 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.

[0358] 3) Configuration information related to the SIB sent after successful triggering by WUS, which may specifically include at least one of the following:

[0359] After successful triggering by WUS, the transmission period of the at least one second object sending SIB, and configuration information of at least one of the Physical Downlink Control Channel (PDCCH) and the Control Resource Set (CORESET) carrying the scheduling information of this SIB;

[0360] After successful triggering by WUS, the listening window for the at least one second object to send SIB, that is, the UE listens for SIB within this listening window;

[0361] After the successful triggering of WUS, at least one second object sends one of the transmission time length, number of transmissions, and number of transmission periods of the SIB, such as one of the transmission time length, number of transmissions, and number of transmission periods of SIB1;

[0362] After the successful triggering of WUS, at least one second object sends the frequency domain resource information of the SIB, and the frequency domain resource information includes at least one of the starting position of the frequency domain resource (for example, the carrier, BWP, or the position in the frequency band where it is located), the number of frequency bands occupied by the frequency domain resource, and the bandwidth size of the signal;

[0363] After the successful triggering of WUS, at least one second object sends the time domain resource information of the SIB, and the time domain resource information includes at least one of the time domain resource position (for example, the offset relative to the synchronization / broadcast channel), the size of the listening window, the period of the listening window, the number of time domain repeated transmissions, and the time domain repeated transmission mode;

[0364] After the successful triggering of WUS, at least one second object sends the transmission mode of the SIB, and the transmission mode includes one of the normal transmission mode, energy-saving transmission mode, aggregation transmission mode, long-period transmission mode, and on-demand transmission mode. Among them, the energy-saving transmission mode can be a simplified transmission mode that only sends core configuration information such as RACH, and the aggregation transmission mode can be a transmission mode where there is no time domain gap (gap) between multiple SIB1s.

[0365] 4) Characteristic information of at least one second carrier, which may specifically include at least one of the following:

[0366] Whether at least one second carrier is in the barred state;

[0367] The priority of at least one second carrier when the UE performs random access channel selection;

[0368] Whether at least one second carrier 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;

[0369] The characteristic value N of the UE ID allowed for random access on at least one second carrier. For example, a UE with UE ID mod carrier number = N can perform random access on this carrier;

[0370] Whether at least one second carrier supports UE residence;

[0371] Whether at least one second carrier is a suitable cell;

[0372] Whether at least one second carrier supports cell selection and / or cell reselection;

[0373] Partial system information of at least one second carrier, where the partial system information includes at least one of Public Land Mobile Network (PLMN) information, related configuration information of cell selection criteria, related configuration information of cell reselection criteria, and cell bar information;

[0374] Whether at least one second carrier can use the first carrier as a reference carrier;

[0375] Whether at least one second carrier is co-located with the first carrier;

[0376] Whether at least one second carrier is in the same Timing Advance Group (TAG) as the first carrier;

[0377] Whether at least one second carrier has a Quasi Co Location (QCL) relationship with the first carrier;

[0378] The reference carrier of at least one second carrier;

[0379] The carrier co-located with at least one second carrier;

[0380] The carrier in the same TAG as at least one second carrier;

[0381] The carrier having a QCL relationship with at least one second carrier.

[0382] 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, related configuration information of cell selection criteria, related configuration information of cell reselection criteria, and cell bar information corresponding to the second carrier is the same as that of the first carrier.

[0383] In some embodiments, after the UE detects a first carrier and obtains first information, if the first carrier is determined to be a suitable cell, the UE selects the first carrier for camping (monitor paging), or selects a carrier from the first carrier and / or the third carrier group for camping (monitor paging) according to a first rule, where,

[0384] ■ The third carrier group includes at least one of a carrier that uses the first carrier as a reference cell, is co-located with the first carrier, and is on the same frequency band as and continuous with the first carrier.

[0385] If the first carrier is determined not to be a suitable cell, at least one of the following is performed:

[0386] ■ The UE selects one or more carriers from the second carrier group to send corresponding Wake-Up Signals (WUS) and receive System Information Block 1 (SIB1), and determines whether the one or more carriers are suitable cells according to the SSB measurement results and SIB1 information;

[0387] ◆ If at least one second carrier is a suitable cell, the UE selects one of the second carriers for camping (monitor paging) according to the first rule.

[0388] ■ The UE selects one or more carriers from the second carrier group as target cells, and determines 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 results.

[0389] ◆ If at least one second carrier is a suitable cell, the UE selects one of the second carriers according to the first rule, sends a WUS to it, and camps (monitor paging) on the carrier after obtaining SIB1.

[0390] ■ The UE ignores the second carrier group and seeks other suitable cells.

[0391] Optionally, in some embodiments, the UE performs one of the following to determine the target carrier for performing a first operation:

[0392] ■ 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, determines whether it is a suitable cell according to the SSB measurement results and SIB1 configuration; for the carriers in the second carrier group, sends corresponding WUS and receives SIB1, and determines whether the one or more carriers are suitable cells according to the SSB measurement results and SIB1;

[0393] ◆ If at least one carrier is a suitable cell, the UE selects one of the carriers for camping (monitor paging) according to the first rule.

[0394] ■ 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, it is judged 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.

[0395] ◆ If at least one carrier is a suitable cell, the UE selects one of the carriers according to the first rule: If the carrier is the first carrier, the UE directly camps on the first carrier; If the carrier is a carrier in the second carrier group,

[0396] The UE first sends WUS to this carrier, obtains SIB1, and then camps on this carrier (monitor paging).

[0397] It should be noted that the reference signals 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 sent on this second carrier, the SSB measurement result is directly obtained by performing SSB measurement on this second carrier; If there is no SSB sent on this second carrier, the SSB measurement result sent on the fourth carrier is used as the SSB measurement result of this second carrier, where the fourth carrier may include a reference carrier configured for this second carrier, a carrier co-located with this second carrier, or a carrier in the same frequency band as this second carrier and continuous with each other. Or, if there is no SSB sent on this second carrier, the measurement result of the SSB sent by the second carrier after successful WUS triggering is used as the SSB measurement result of this second carrier (the same below, not repeated).

[0398] In some embodiments, for the 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.

[0399] In some embodiments, for the UE camping on the first carrier, if there is a need for random access, the UE selects one for the target carrier of random access according to the first rule in the first carrier and the second carrier group:

[0400] 1) If the selected target carrier is the first carrier, the UE directly initiates RACH for random access;

[0401] 2) If the selected target carrier is a carrier in the second carrier group, the UE first sends WUS to this carrier to obtain SIB1, and then initiates RACH on this carrier for random access according to the configuration information of this SIB1.

[0402] In some embodiments, the first rule includes: the UE screens out eligible target carriers, and the conditions include at least one of the following:

[0403] The target carrier is not in a barred state for the UE;

[0404] The RSRP / RSRQ measured on the target carrier meets certain conditions, for example, is greater than or equal to a threshold;

[0405] The target carrier is a suitable cell for the UE.

[0406] 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:

[0407] Randomly select the target carrier;

[0408] Randomly generate a weight value p, and 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;

[0409] The network side indicates / configures the target carrier for which the UE is to perform random access;

[0410] Select the carrier with the largest or smallest carrier index as the target carrier;

[0411] Select the carrier with the largest, smallest, or intermediate center frequency as the target carrier;

[0412] Select the carrier with the largest or smallest SCS as the target carrier;

[0413] Select the second carrier with the smallest frequency interval from the first carrier as the target carrier;

[0414] Select the carrier that requires the fewest number of WUS transmissions as the target carrier;

[0415] Select the carrier with the highest priority as the target carrier;

[0416] Select the carrier with the largest RSRP / SINR measurement value of the reference signal as the target carrier.

[0417] In the above-mentioned scenario 3 (the second carrier does not transmit SSB and SIB1 and performs normal RACH monitoring), the first carrier is configured with WUS configuration information for triggering each second carrier in the second carrier group to transmit SSB and SIB. At least one second carrier in the second carrier group does not transmit SSB or transmits sparse SSB, and it is necessary to use WUS to trigger SSB transmission and perform normal RACH monitoring. Specifically:

[0418] Cell 0: Belongs to band0, normally transmits SSB, and is configured with WUS configuration information for triggering Cell1, Cell2, and Cell3 to transmit SIB1 and SSB;

[0419] Cell 1: Belongs to Band 1, does not transmit SSB, performs normal RACH monitoring, and does not transmit SIB1;

[0420] Cell 2: Belongs to Band 2, normally transmits SSB, performs normal RACH monitoring, and does not transmit SIB1;

[0421] Cell 3: Belongs to Band3, transmits sparse SSB, performs normal RACH monitoring, and does not transmit SIB1.

[0422] In some embodiments, the first information about the second carrier group (such as Cell1, Cell2, and Cell3) sent by the network-side device through the first carrier may include at least one of the following:

[0423] 1) WUS configuration information for triggering at least one second carrier to transmit SIB or perform SIB adaptation adjustment;

[0424] 2) WUS configuration information for triggering at least one second carrier to transmit SSB or perform SSB adaptation adjustment;

[0425] 3) Configuration information related to the SSB currently being transmitted by at least one second carrier, which may specifically include at least one of the following:

[0426] Whether at least one second carrier is transmitting SSB;

[0427] At least one of the frequency point of the SSB being transmitted by at least one second carrier, the SSB transmission period, and the number of SSBs within one transmission period;

[0428] The transmission mode of the SSB transmitted by 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 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.

[0429] 4) The relevant configuration information of the SIB transmitted after being successfully triggered by WUS, which may specifically include at least one of the following:

[0430] After being successfully triggered by WUS, the transmission period of the SIB transmitted by the at least one second object, and the configuration information of at least one of the Physical Downlink Control Channel (PDCCH) and the Control Resource Set (CORESET) carrying the scheduling information of the SIB;

[0431] After being successfully triggered by WUS, the listening window for the at least one second object to transmit the SIB, that is, the UE listens for the SIB within this listening window;

[0432] After being successfully triggered by WUS, one of the transmission time length, the number of transmissions, and the number of transmission periods of the SIB transmitted by the at least one second object, such as one of the transmission time length, the number of transmissions, and the number of transmission periods of SIB1;

[0433] After being successfully triggered by WUS, the frequency-domain resource information of the SIB transmitted by the at least one second object, where the frequency-domain resource information includes at least one of the starting position of the frequency-domain resource (for example, the carrier, BWP, or the position in the frequency band where it is located), the number of frequency bands occupied by the frequency-domain resource, and the bandwidth size of the signal;

[0434] After being successfully triggered by WUS, the time-domain resource information of the SIB transmitted by the at least one second object, where the time-domain resource information includes at least one of the time-domain resource position (for example, the offset relative to the synchronization / broadcast channel), the size of the listening window, the period of the listening window, the number of time-domain repeated transmissions, and the time-domain repeated transmission mode;

[0435] After the successful triggering of WUS, the at least one second object sends the transmission mode of the SIB, and the transmission mode includes one of a normal transmission mode, an energy-saving transmission mode, an aggregation transmission mode, a long-period transmission mode, and an on-demand transmission mode. Among them, the energy-saving transmission mode may be a simplified transmission mode that only sends core configuration information such as RACH, and the aggregation transmission mode may be a transmission mode in which there is no time-domain gap between multiple SIB1s.

[0436] 5) The relevant configuration information of the SSB sent after the successful triggering of WUS may specifically include at least one of the following:

[0437] After the successful triggering of WUS, the at least one second access object sends at least one of the frequency point of the SSB, the period of sending the SSB, and the number of SSBs within one transmission period;

[0438] After the successful triggering of WUS, the at least one second access object sends the listening window of the SSB, that is, the UE listens for the SSB within this listening window;

[0439] After the successful triggering of WUS, at least one time-domain resource index or the position of at least one time-domain resource where the at least one second access object actually sends the SSB;

[0440] After the successful triggering of WUS, the at least one second access object sends at least one of the transmission time length of the SSB, the number of SSB transmissions, and the number of SSB transmission periods;

[0441] After the successful triggering of WUS, the relative relationship of at least one of the time domain, frequency domain, and spatial domain between the SSB sent by the at least one second access object and the SSB sent by the first access object;

[0442] After the successful triggering of WUS, the time-domain resource position of the first SSB or the first SIB 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;

[0443] After the successful triggering of WUS, the at least one second access object sends the transmission mode of the SSB, and the transmission mode includes one of a normal transmission mode, an energy-saving transmission mode (such as only sending PSS and SSS), an aggregation transmission mode (such as no time-domain gap between multiple SSBs), a long-period transmission mode (the SSB period is longer), and an on-demand transmission mode.

[0444] 6) The characteristic information of at least one second carrier may specifically include at least one of the following:

[0445] Whether at least one second carrier is in a barred state;

[0446] The priority of at least one second carrier when the UE performs random access channel selection;

[0447] Whether 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;

[0448] The eigenvalue N of the UE ID allowed to perform random access on at least one second carrier. For example, a UE with UE ID mod number of carriers = N can perform random access on this carrier;

[0449] Whether at least one second carrier supports UE residence;

[0450] Whether at least one second carrier is a suitable cell;

[0451] Whether at least one second carrier supports cell selection and / or cell reselection;

[0452] Partial system information of at least one second carrier, where the partial system information includes 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.

[0453] 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, relevant configuration information of cell selection criteria, relevant configuration information of cell reselection criteria, and cell bar information corresponding to the second carrier is the same as that of the first carrier.

[0454] In some embodiments, after the UE detects the first carrier and obtains the first information, if the first carrier is determined to be a suitable cell, the UE selects the first carrier for residence (monitor paging). If the first carrier is determined not to be a suitable cell, the UE performs at least one of the following:

[0455] ■ The UE selects one or more carriers from the second carrier group according to the first rule to send the corresponding WUS and receive SIB1 and / or SSB, and determines whether the one or more carriers are suitable cells according to the SSB measurement results and SIB1 information;

[0456] ◆ 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.

[0457] ■ The UE selects one or more carriers from 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 results; for the carriers without SSB transmission in the second carrier group, the SSB measurement results are detected after the WUS triggers the successful transmission of SSB.

[0458] ◆ If at least one carrier is a suitable cell, the UE selects one of the carriers according to the first rule, sends WUS to it, and camps on (monitor paging) this carrier after obtaining SIB1.

[0459] ■ The UE ignores the second carrier group and seeks other suitable cells.

[0460] Optionally, in some embodiments, the UE performs one of the following to determine the target carrier for performing the first operation:

[0461] ■ 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, determines whether it is a suitable cell according to the SSB measurement results and SIB1 configuration; for the carriers in the second carrier group, sends the corresponding WUS and receives SIB1 and / or SSB, and determines whether the one or more carriers are suitable cells according to the SSB measurement results and SIB1.

[0462] ◆ 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.

[0463] ■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 with SSB transmission in the second carrier group, it is judged 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; For the carriers without SSB transmission in the second carrier group, the corresponding WUS is sent to receive SIB1 and SSB, and it is judged whether the one or more carriers are suitable cells according to the SSB measurement result and SIB1.

[0464] ◆If at least one carrier is a suitable cell, the UE selects one of the carriers according to the first rule: If the carrier is the first carrier, it directly camps on the first carrier; If the carrier is a carrier in the second carrier group, send WUS to the carrier, and after obtaining SIB1, camp on the carrier (monitor paging).

[0465] In some embodiments, for the UE camping 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 performs at least one of the following:

[0466] ■Send WUS to the carrier, and after obtaining SIB1 and / or SSB, judge whether the cell is a suitable cell.

[0467] ◆If it is a suitable cell, the UE performs cell reselection and camps on the cell.

[0468] ■Judge whether the cell is a suitable cell. If it is a suitable cell, send WUS to obtain SIB1, perform cell reselection and camp on the cell.

[0469] ■Send WUS to the carrier to trigger the transmission of SSB. After obtaining the SSB measurement result, the UE judges whether the cell is a suitable cell. If it is a suitable cell, send WUS to obtain SIB1, perform cell reselection and camp on the cell.

[0470] In some embodiments, for the 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.

[0471] In some embodiments, for the UE camping 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:

[0472] 1) If the selected target carrier is the first carrier, directly initiate RACH for random access;

[0473] 2) If the selected target carrier is a carrier in the second carrier group, first send WUS to this carrier to obtain SIB1 and / or SSB, and then initiate RACH for random access on this carrier according to the configuration of SIB1.

[0474] In some embodiments, the first rule includes: The UE filters out eligible target carriers, and the conditions include at least one of the following:

[0475] The target carrier is not in a barred state for this UE;

[0476] The RSRP / RSRQ measured on the target carrier meets certain conditions, such as being greater than or equal to a threshold;

[0477] The target carrier is a suitable cell for this UE;

[0478] The target carrier performs normal SSB transmission.

[0479] In some embodiments, the UE selects a target carrier from all carriers (the first carrier and / or the second carrier group) or all filtered-out carriers, including at least one of the following:

[0480] Randomly select the target carrier;

[0481] 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 select carrier i as the target carrier;

[0482] The network side indicates / configures the target carrier for which the UE is to perform random access;

[0483] Select the carrier with the largest or smallest carrier index as the target carrier;

[0484] Select the carrier with the largest or smallest or intermediate center frequency as the target carrier;

[0485] Select the carrier with the largest or smallest SCS as the target carrier;

[0486] Select the second carrier with the smallest frequency interval from the first carrier as the target carrier;

[0487] Select the carrier that requires the fewest number of WUS transmissions as the target carrier;

[0488] Select the carrier with the highest priority as the target carrier;

[0489] Select the carrier with the largest RSRP / SINR measurement value of the reference signal as the target carrier.

[0490] In the scenario 4 mentioned above (the second carrier does not send SSB (referenced by the first carrier), does not send SIB1, and does not perform normal RACH monitoring), the first carrier is configured with WUS configuration information for triggering each second carrier in the second carrier group to send SIB1 and perform RACH monitoring. All second carriers in the second carrier group send SSB, or do not send SSB (referenced by the first carrier) and do not perform normal RACH monitoring. Specifically:

[0491] Cell 0: Belongs to band0, normally sends SSB, and is configured with WUS configuration information for triggering SIB1, SSB sending, and / or RACH monitoring of Cell1, Cell2, and Cell3;

[0492] Cell 1: Belongs to Band 1, does not send SSB (referenced by the first carrier), does not perform normal RACH monitoring, and does not send SIB1;

[0493] Cell 2: Belongs to Band 2, normally sends SSB, does not perform normal RACH monitoring, and does not send SIB1;

[0494] Cell 3: Belongs to Band3, does not send SSB (referenced by the first carrier), does not perform normal RACH monitoring, and does not send SIB1.

[0495] For scenario 4, regarding the first information about the second carrier group sent by the network device through the first carrier, how the UE determines the target object for performing the first operation according to the first rule and the first information, reference can be made to the description of scenario 2 above. Only the differences between the two are described here. Specifically, the differences between the two are as follows:

[0496] For random access:

[0497] In some embodiments, when the selected random access carrier is a carrier in the second carrier group, the UE needs to send WUS to trigger the target carrier to perform RACH monitoring, and then perform the RACH random access process.

[0498] For WUS:

[0499] In some embodiments, the function of each WUS is single. For example, the first WUS is used to trigger the transmission of SIB1 on the target carrier. After detecting SIB1, the UE then sends the second WUS to trigger the target carrier to perform RACH monitoring. The resource configuration information of these two WUSs is configured by the network side through Cell0 (the first carrier), and the time-frequency resources for sending these two WUSs can be completely overlapping resources or two independent sets of resources.

[0500] In some embodiments, two functions can also be completed by one WUS: triggering the transmission of SIB1 on the target carrier and triggering the target carrier to perform RACH monitoring.

[0501] In the scenario 5 mentioned above (the second carrier does not send SSB, does not send SIB1, and does not perform normal RACH monitoring), the first carrier is configured with WUS configuration information for triggering each second carrier in the second carrier group to send SSB, SIB1, and perform RACH monitoring. At least one second carrier in the second carrier group does not send SSB, does not send SIB1, and does not perform normal RACH monitoring. Specifically:

[0502] Cell 0: Belongs to band0, normally sends SSB, and is configured with WUS configuration information for triggering the SIB1, SSB transmission, and RACH monitoring of Cell1, Cell2, and Cell3;

[0503] Cell 1: Belongs to Band 1, sends SSB as needed, does not perform normal RACH monitoring, and does not send SIB1;

[0504] Cell 2: Belongs to Band 2, normally sends SSB, does not perform normal RACH monitoring, and does not send SIB1;

[0505] Cell 3: Belongs to Band3, sends sparse SSB, does not perform normal RACH monitoring, and does not send SIB1.

[0506] For scenario 5, regarding how the UE determines the target object for performing the first operation according to the first rule and the first information about the second carrier group sent by the network side device through the first carrier, reference can be made to the description of scenario 3 above. Only the differences between the two are described here. Specifically, the differences between the two are as follows:

[0507] For random access:

[0508] In some embodiments, when the selected random access carrier is a carrier in the second carrier group, the UE needs to send a WUS to trigger the target carrier to perform RACH monitoring, and then perform the RACH random access process.

[0509] For WUS:

[0510] In some embodiments, the first WUS is used to trigger the transmission of SIB1 and SSB on the target carrier. After detecting the SIB1 or SSB transmitted on the target carrier, the UE then sends a second WUS to trigger the RACH monitoring on the target carrier. The resource configuration of these two WUSs is configured by the network side through Cell0 (the first carrier), and the time-frequency resources for transmitting these two WUSs can be completely overlapping resources or two independent sets of resources. Taking the target carrier as Cell2 as an example, the process of the UE sending WUS to initiate random access is as Figure 6 shown.

[0511] Refer to Figure 6 to know that this process may include:

[0512] Step 601, the UE sends the first WUS from Cell0 to Cell2 to trigger Cell2 to send SSB and SIB1;

[0513] Step 602, the UE monitors the SSB and SIB1 sent by Cell2 according to the first information;

[0514] Step 603, the UE sends the second WUS from Cell0 to Cell2 to trigger Cell2 to perform RACH monitoring;

[0515] Step 604, the UE initiates random access to Cell2 according to the monitored SSB and SIB1.

[0516] In some embodiments, three functions can also be completed through one WUS: triggering the transmission of SIB1 on the target carrier, transmitting SSB, and triggering the target carrier to perform RACH monitoring. Taking the target carrier as Cell2 as an example, the process of the UE sending WUS to initiate random access is as Figure 7 shown.

[0517] Refer to Figure 7 to know that this process may include:

[0518] Step 701, the UE sends the first WUS from Cell0 to Cell2 to trigger the transmission of SSB, SIB1, and perform RACH monitoring;

[0519] Step 702, the UE monitors the SSB and SIB1 sent by Cell2 according to the first information;

[0520] Step 703, the UE initiates random access to Cell2 according to the monitored SSB and SIB1.

[0521] Embodiment 2 (When there are multiple carriers, the UE selects the carrier with the highest priority for RACH)

[0522] On the first carrier Cell0 in operation, the terminal obtains the first information about the second carriers Cell1, Cell2, and Cell3. Specifically:

[0523] ●Cell 0: Belongs to band0, normally transmits SSB, and is configured with the WUS configuration information for triggering the SSB, SIB1 transmission, and RACH listening of Cell1, Cell2, and Cell3;

[0524] ●Cell 1: Belongs to Band 1, does not normally transmit SSB (referenced by the first carrier), does not perform normal RACH listening, and does not normally transmit SIB1 (on-demand SIB1);

[0525] ●Cell 2: Belongs to Band 2, transmits SSB on demand, does not perform normal RACH listening, and normally transmits SIB1;

[0526] ·Cell 3: Belongs to Band 3, does not normally transmit SSB (referenced by the first carrier), does not perform normal RACH listening, and does not normally transmit SIB1 (on-demand SIB1);

[0527] ●Cell 4: Belongs to Band 4, does not normally transmit SSB (referenced by the first carrier), performs normal RACH listening, and does not normally transmit SIB1 (on-demand SIB1);

[0528] ●Cell 5: Belongs to Band 5, does not normally transmit SSB (referenced by the first carrier), performs normal RACH listening, and normally transmits SIB1.

[0529] In this embodiment, the UE selects the target carrier for random access according to the priority of the carriers:

[0530] ●The priority of the carrier that normally transmits SSB > the priority of the carrier that does not normally transmit SSB (referenced by the first carrier) > the priority of the carrier that transmits SSB on demand (on-demand SSB);

[0531] ●The priority of the carrier that normally transmits SIB > the priority of the carrier that transmits SIB on demand (on-demand SIB);

[0532] ●The priority of the carrier that normally listens to RACH > the priority of the carrier that listens to RACH on demand.

[0533] It should be noted that the on-demand SSB involved in the embodiments of the present application means that the carrier supports the on-demand SSB transmission mode, that is, it supports the UE to trigger the transmission of normal SSB with WUS. The same applies to on-demand SIB1 and on-demand RACH monitoring.

[0534] Embodiment 3 (When there are multiple carriers with different transmission modes or the same transmission mode, the UE selects the carrier with the fewest required WUS transmissions for RACH)

[0535] The terminal obtains the first information about the second carriers Cell1, Cell2, Cell3, Cell4, and cell5 on the first carrier Cell0 in operation. Specifically:

[0536] ● Cell 0: Belongs to band0, normally transmits SSB, performs normal RACH monitoring, and normally transmits SIB1;

[0537] ● Cell 1: Belongs to Band 1, does not normally transmit SSB (using the SSB of the first carrier as a reference), performs normal RACH monitoring, and normally transmits SIB1;

[0538] ● Cell 2: Belongs to Band 2, transmits SSB on demand (on-demand SSB), performs normal RACH monitoring, and transmits SIB1 on demand (on-demand SIB1);

[0539] ● Cell 3: Belongs to Band 3, normally transmits SSB, does not perform normal RACH monitoring, and transmits SIB1 on demand;

[0540] · Cell 4: Belongs to Band 4, does not normally transmit SSB (using the SSB of the first carrier as a reference), does not perform normal RACH monitoring, and normally transmits SIB1;

[0541] ● Cell 5: Belongs to Band 5, transmits SSB on demand, does not perform normal RACH monitoring, and transmits SIB1 on demand.

[0542] The UE selects a carrier for random access on the second carrier group according to the principle of the fewest required WUS transmissions. In this embodiment, sending WUS once is either used to trigger the transmission of SIB1 and / or SSB or used to trigger RACH monitoring. Specifically:

[0543] ● For Cell1, there is no need to send WUS, and the UE can directly use the SSB of the first carrier as a reference to perform random access on Cell1;

[0544] ● For Cell2, it is necessary to send WUS twice to trigger the transmission of the SSB of Cell2 and the transmission of SIB1;

[0545] ● For Cell3, it is necessary to send WUS twice to trigger the transmission of SIB1 of Cell3 and the RACH monitoring;

[0546] ● For Cell4, it is necessary to send WUS once to trigger the RACH monitoring of Cell4;

[0547] · For Cell5, it is necessary to send WUS twice, once to trigger the transmission of SSB and SIB1, and once to trigger the ARCH monitoring.

[0548] The above introduces a random access method provided by an embodiment of the present application. Corresponding to the above random access method, an embodiment of the present application also proposes a communication method, which will be described below.

[0549] As Figure 8 shown, a communication method proposed by an embodiment of the present application may include:

[0550] Step 801, 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 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).

[0551] Among them, the access object may include one of a carrier, a cell, and a bandwidth part (BWP). A random access method proposed by 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.

[0552] 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.

[0553] 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 transmit SSB (SSB-less carrier), or the second access object is a carrier that supports on-demand transmission of SSB (on-demand SSB carrier). Wherein, the first information may be sent by the first access object through a broadcast message; or, by default, the first information is the same as the corresponding information of the first access object.

[0554] Wherein, the first information corresponds to at least one second access object in the second access object group, and the first information may include at least one of the following:

[0555] 1) Wake-up signal WUS configuration information for triggering at least one of the second access objects to transmit SSB, or WUS configuration information for triggering SSB adaptation adjustment of at least one of the second access objects, wherein the SSB includes at least one of a synchronization signal block and a physical broadcast channel block;

[0556] 2) Wake-up signal WUS configuration information for triggering at least one of the second access objects to transmit SIB, or WUS configuration information for triggering SIB adaptation adjustment of at least one of the second access objects;

[0557] 3) Wake-up signal 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;

[0558] 4) Related configuration information of the SSB currently being transmitted by at least one of the second access objects, which may specifically include at least one of the following:

[0559] Whether at least one of the second access objects is transmitting SSB;

[0560] At least one of the frequency point of the SSB being transmitted by at least one of the second access objects, the SSB transmission period, and the number of SSBs within one transmission period;

[0561] 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 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.

[0562] 5) Configuration information related to the SIB currently being transmitted by the at least one second access object, which may specifically include at least one of the following:

[0563] Whether the at least one second access object transmits the SIB;

[0564] The transmission cycle of the SIB being transmitted by the at least one second access object;

[0565] Configuration information of at least one of the Physical Downlink Control Channel (PDCCH) and the control resource set associated with the SIB being transmitted by the at least one second access object;

[0566] The transmission mode of the SIB 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 SIB), 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 SIB1s.

[0567] 6) 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:

[0568] Whether the at least one second access object performs RACH listening;

[0569] 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;

[0570] 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 short for Physical Random Access Channel Occasion.

[0571] 7) The relevant configuration information of the SSB sent after being successfully triggered by WUS, which may specifically include at least one of the following:

[0572] 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;

[0573] After being successfully triggered by WUS, the listening window of the SSB sent by the at least one second access object, that is, the UE listens to the SSB within this listening window;

[0574] After being successfully triggered by WUS, at least one time domain resource index or the position of at least one time domain resource of the actually sent SSB by the at least one second access object;

[0575] 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 transmission periods;

[0576] 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;

[0577] After being successfully triggered by WUS, the time domain resource position of the first SSB or the first SIB 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;

[0578] After being successfully triggered by WUS, the sending mode of the SSB sent by the at least one second access object, 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.

[0579] 8) Configuration information related to the SIB sent after successful triggering by WUS, which may specifically include at least one of the following:

[0580] After successful triggering by WUS, the transmission period of the SIB sent by the at least one second object, and configuration information of at least one of the Physical Downlink Control Channel (PDCCH) and Control Resource Set (CORESET) carrying the scheduling information of the SIB;

[0581] After successful triggering by WUS, the listening window for the SIB sent by the at least one second object, that is, the UE listens for the SIB within this listening window;

[0582] After successful triggering by WUS, one of the transmission time length, number of transmissions, and number of transmission periods of the SIB sent by the at least one second object, such as one of the transmission time length, number of transmissions, and number of transmission periods of SIB1;

[0583] After successful triggering by WUS, the frequency domain resource information of the SIB sent by the at least one second object, and the frequency domain resource information includes at least one of the starting position of the frequency domain resource (for example, the carrier, BWP, or the position in the frequency band where it is located), the number of frequency bands occupied by the frequency domain resource, and the bandwidth size of the signal;

[0584] After successful triggering by WUS, the time domain resource information of the SIB sent by the at least one second object, and the time domain resource information includes at least one of the time domain resource position (for example, the offset relative to the synchronization / broadcast channel), the size of the listening window, the period of the listening window, the number of time domain repeated transmissions, and the time domain repeated transmission mode;

[0585] After successful triggering by WUS, the transmission mode of the SIB sent by the at least one second object, and the transmission mode includes one of the normal transmission mode, energy-saving transmission mode, aggregation transmission mode, long-period transmission mode, and on-demand transmission mode. Among them, the energy-saving transmission mode can be a simplified transmission mode that only sends core configuration information such as RACH, and the aggregation transmission mode can be a transmission mode where there is no time domain gap between multiple SIB1s.

[0586] 9) Configuration information related to RACH listening after successful triggering by WUS, which may specifically include:

[0587] After the successful triggering of the WUS, at least one of the following information of the at least one second access object is monitored: the period of monitoring the RACH, the number of RACHs monitored, the frequency domain resource configuration information of monitoring the RACH, the time domain resource configuration information of monitoring the RACH, and the monitoring mode of monitoring the RACH, where the monitoring mode includes one of a normal monitoring mode, a simplified monitoring mode (such as reducing the RO opportunity), an aggregated monitoring mode (no time domain interval between multiple ROs), and a on-demand monitoring mode.

[0588] 10) The characteristic information of the at least one second access object may specifically include at least one of the following:

[0589] The identification information of the at least one second access object;

[0590] Whether the at least one second access object can use the first access object as a reference access object;

[0591] Whether the at least one second access object is co-located with the first access object;

[0592] Whether the at least one second access object is in the same Timing Advance Group (TAG) as the first access object;

[0593] Whether the at least one second access object has a Quasi CoLocation (QCL) relationship with the first access object;

[0594] The reference access object of the at least one second access object;

[0595] The access object co-located with the at least one second access object;

[0596] The access object in the same TAG as the at least one second access object;

[0597] The access object having a QCL relationship with the at least one second access object;

[0598] Whether the at least one second access object is in a prohibited Bar state;

[0599] The priority of the at least one second access object when the UE performs random access channel selection;

[0600] Whether the at least one second access object is set to the Bar state for UEs of the first type, where the first type includes at least one of Reduced Capability (Redcap), Non-Terrestrial Network (NTN), and Network Energy Saving (NES) function;

[0601] The eigenvalue N of the UE ID allowed to perform 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;

[0602] Whether the at least one second access object supports UE residence;

[0603] Whether the at least one second access object is a suitable cell;

[0604] Whether the at least one second access object supports cell selection and / or cell reselection;

[0605] Partial system information of the at least one second access object, where the partial system information includes 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.

[0606] Among them, the WUS configuration information included in the first information may include at least one of the following:

[0607] 1) Synchronization reference configuration information of WUS, which may specifically include at least one of the following:

[0608] At least one of the SSB, Channel State Information-Reference Signal (CSI-RS), and tracking reference signal (TRS) of the first access object;

[0609] GPS timing.

[0610] 2) Resource configuration information of WUS, which may specifically include at least one of the following:

[0611] Time-domain resource information;

[0612] Frequency domain resource information;

[0613] Signal sequence configuration information. For example, the preamble group 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.

[0614] 3) Power configuration information of the WUS, which can specifically include at least one of the following:

[0615] Initial power of the signal;

[0616] Signal power ramp step.

[0617] 4) Repetition transmission configuration information of the WUS, which can specifically include at least one of the following:

[0618] Number of repetitions of a single signal transmission;

[0619] Maximum number of repetitions of channel transmission.

[0620] 5) Spatial domain parameter configuration information of the WUS, which can specifically include at least one of the following:

[0621] Correspondence between the WUS and the SSB of the first access object;

[0622] Correspondence between the WUS and the SSB of the at least one second access object;

[0623] Correspondence between the WUS and the SSB of the second access object group.

[0624] 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.

[0625] Among them, the form of the WUS signal includes at least one of the following:

[0626] RACH;

[0627] Msg1;

[0628] Preamble sequence;

[0629] Sounding Reference Signal (SRS);

[0630] Physical Uplink Control Channel (PUCCH).

[0631] Among them, the configuration method of the resource configuration information of the WUS includes at least one of the following:

[0632] Configure a signal resource list in the first information, where 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;

[0633] Configure a signal resource list in the first information, where each element of the signal resource list corresponds explicitly to the second access object or the second access object group index;

[0634] 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 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;

[0635] Configure one or more signal resources for the second access object or the second access object group in the first information.

[0636] Among them, the signal resources configured by the resource configuration information of the WUS include at least one of the following:

[0637] 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;

[0638] The time-frequency resources are the time-frequency resources of the dedicated RACH on the first access object or the second access object group that are specifically used to trigger SSB / SIB 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;

[0639] The time-frequency resources are the time-frequency resources of the dedicated SRS / PUCCH on the first access object or the second access object group that are used to trigger SSB / SIB transmission and / or RACH listening.

[0640] Among them, the grouping method of the second access object group includes at least one of the following:

[0641] Configured by the network-side device;

[0642] Specified by the protocol.

[0643] Among them, the grouping rules of the second access object group include at least one of the following:

[0644] The second access objects in the same frequency band are grouped as one group;

[0645] The second access objects in the same frequency band range are grouped as one group;

[0646] The second access objects with at least one of the Initial BWP, active BWP, SSB, and SCS being the same are grouped as one group;

[0647] The second access objects with the same transmission mode are grouped as one group, where the transmission mode is related to at least one of the following: whether to send SSB, whether to perform RACH monitoring, and whether to support on-demand SSB, etc.;

[0648] The co-located second access objects are grouped as one group;

[0649] The second access objects with the same SSB transmission period are grouped as one group.

[0650] Regarding how the terminal 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.

[0651] Figure 8 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, without the second access object continuously sending information such as SSB and SIB all the time, but sending SSB on demand or performing RACH monitoring on demand. Therefore, while saving energy on the network side, the capacity of the network side can be guaranteed to the greatest extent.

[0652] Optionally, when 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 send SSB / SIB, or the WUS configuration information for triggering the SSB / SIB adaptation adjustment of at least one of the second access objects, and the first information includes the WUS configuration information for triggering the random access channel RACH monitoring of at least one of the second access objects, or the WUS configuration information for triggering the RACH monitoring adaptation adjustment of at least one of the second access objects, a communication method provided by the embodiments of the present application may further include:

[0653] The target access object receives a wake-up signal WUS, where the WUS is used to trigger the target access object to perform at least one of transmitting an SSB, transmitting an SIB, and monitoring a RACH.

[0654] In one example, the target access object receives a wake-up signal WUS, and the WUS is transmitted by the terminal when a first condition is satisfied.

[0655] Wherein, the first condition may include at least one of the following:

[0656] 1) The first access object is not a suitable cell;

[0657] 2) The target access object is a suitable cell;

[0658] 3) Perform intra-frequency or inter-frequency measurement on the target access object;

[0659] 4) The target access object is in a first energy-saving state, where the first energy-saving state includes at least one of not transmitting an SSB, not transmitting an SIB, not monitoring a RACH, transmitting an energy-saving SSB (such as Sparse SSB), transmitting an energy-saving SIB (such as Sparse SIB), and energy-saving monitoring of 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;

[0660] 5) The terminal is sensitive to access latency;

[0661] 6) The terminal is in the process of recovering from a link failure.

[0662] In another example, the wake-up signal WUS for the target access object is transmitted by the terminal assuming that the target access object is in a second energy-saving state.

[0663] Wherein, the second energy-saving state may include at least one of the following:

[0664] Not transmitting an SIB, normally transmitting an SSB, and performing normal RACH monitoring;

[0665] Not transmitting an SIB, not transmitting an SSB or transmitting an energy-saving SSB (such as a simplified SSB or a sparse SSB, etc.), with the first access object as a reference, and performing normal RACH monitoring;

[0666] Not transmitting an SIB, normally transmitting an SSB, and not performing normal RACH monitoring;

[0667] 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;

[0668] Send SIB, send SSB normally, and do not perform normal RACH monitoring;

[0669] Send SIB, do not send SSB or send energy-saving SSB, and do not perform normal RACH monitoring;

[0670] Send SIB, send SSB normally, and perform normal RACH monitoring;

[0671] Send SIB, do not send SSB or send energy-saving SSB, and perform normal RACH monitoring;

[0672] Among them, the energy-saving SSB includes one of lightweight SSB, simplified SSB, sparse SSB, and long-period SSB.

[0673] In the first example, the target access object receiving the wake-up signal WUS may include: the target access object receives one WUS, and this WUS can be used for two purposes: one is to trigger the target access object to send SSB and / or send SIB, and the other is to trigger the target access object to monitor RACH.

[0674] In the second example, the target access object receiving the wake-up signal WUS may include: the target access object receives the first WUS, and the first WUS is used to trigger the target access object to send SSB and / or send SIB; the target access object receives the second WUS, where the second WUS is used to trigger the target access object to monitor RACH.

[0675] Exemplarily, the target access object receiving the second WUS (the time point of receiving the second WUS) includes one of the following:

[0676] The target access object receives the second WUS that the terminal starts to send Z time slots / symbols / milliseconds after sending the first WUS;

[0677] The target access object receives the second WUS that the terminal starts to send X time slots / symbols / milliseconds after receiving the feedback for the first WUS;

[0678] The target access object receives the second WUS that the terminal starts to send Y time slots / symbols / milliseconds after receiving the first SSB or the first SIB sent after successfully triggering the target access object;

[0679] 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.

[0680] 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 the first WUS is sent.

[0681] A communication method provided by this 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, the capacity of the network-side can be guaranteed to the greatest extent.

[0682] Optionally, when the WUS is used to trigger the target access object to send an SSB / SIB, a communication method provided by an embodiment of this application may further include: the target access object sends an SSB / SIB. This enables the target access object to send an SSB / SIB on demand under the trigger of the WUS, thereby preparing for the UE to access the target access object and increasing the capacity of the network-side.

[0683] Optionally, a communication method provided by an embodiment of this application may further include:

[0684] The target access object monitors a first operation (such as random access) initiated by the terminal.

[0685] Optionally, a communication method provided by an embodiment of this application may further include:

[0686] The target access object receives the WUS sent again by the terminal when a second condition is met, to improve the success rate of performing the first operation.

[0687] Wherein, the second condition may include but is not limited to at least one of the following:

[0688] 1) SSB detection fails;

[0689] 2) The number of random access attempts reaches the maximum value;

[0690] The number of transmissions of the WUS is less than or equal to a preset maximum number of transmissions;

[0691] 3) No feedback for the previous WUS is received;

[0692] 4) The previous WUS is used to trigger the transmission of SSB / SIB. After receiving the feedback for the previous WUS signal, the WUS for triggering RACH monitoring is sent again (that is, the re - transmission of WUS is to trigger RACH monitoring);

[0693] 5) No feedback for the previous WUS is received before the timer expires.

[0694] Optionally, the re - transmitted WUS signal has at least one of the following characteristics:

[0695] 1) The signal power increases;

[0696] 2) The time interval from the previous WUS transmission is greater than a preset time interval;

[0697] 3) The frequency - domain resources and sequence resources are the same as those of the previous WUS.

[0698] The above introduces a communication method applied to network - side devices provided by an embodiment of the present application.

[0699] It should be noted that for the random access method or communication method provided by the embodiments of the present application, the execution subject can be a communication device. In the embodiments of the present application, taking the communication device executing the random access method as an example, the communication device provided by the embodiments of the present application is described.

[0700] Next, a communication device provided by an embodiment of the present application will be described with reference to the accompanying drawings. Since the communication device provided by an embodiment of the present application corresponds to the random access method provided by an embodiment of the present application, the description of the communication device provided by an embodiment of the present application is relatively brief, and the detailed content can refer to the introduction in the method embodiment part above.

[0701] As Figure 9 shown, an embodiment of the present application provides a random access device 900, and the device 900 may include: an information receiving module 901 and an access object selection module 902.

[0702] The information receiving module 901 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.

[0703] 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 following mainly takes the multi - carrier scenario as an example for illustration.

[0704] 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 any anchor carrier and non-anchor carrier based on the system information obtained from the anchor carrier.

[0705] 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 transmit SSB (SSB-less carrier), or the second access object is a carrier that supports on-demand transmission of SSB (on-demand SSB carrier). 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.

[0706] Wherein, the first information corresponds to at least one second access object in the second access object group, and the first information may include at least one of the following:

[0707] 1) Wake-up signal WUS configuration information for triggering at least one of the second access objects to transmit SSB, or WUS configuration information for triggering adaptive adjustment of SSB of at least one of the second access objects, wherein the SSB includes at least one of a Synchronization Signal Block and a Physical Broadcast Channel block;

[0708] 2) Wake-up signal WUS configuration information for triggering at least one of the second access objects to transmit SIB, or WUS configuration information for triggering adaptive adjustment of SIB of at least one of the second access objects;

[0709] 3) Wake-up signal WUS configuration information for triggering random access channel RACH monitoring of at least one of the second access objects, or WUS configuration information for triggering adaptive adjustment of RACH monitoring of at least one of the second access objects;

[0710] 4) Configuration information related to the SSB currently being transmitted by at least one of the second access objects, which may specifically include at least one of the following:

[0711] Whether at least one of the second access objects is transmitting SSB;

[0712] At least one of the frequency point of the SSB being transmitted by the at least one second access object, the SSB transmission period, and the number of SSBs within one transmission period

[0713] 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 (long SSB transmission period), 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

[0714] 5) Configuration information related to the SIB currently being transmitted by the at least one second access object, which may specifically include at least one of the following:

[0715] Whether the at least one second access object transmits the SIB

[0716] The transmission period of the SIB being transmitted by the at least one second access object

[0717] Configuration information of at least one of the Physical Downlink Control Channel (PDCCH) and the control resource set associated with the SIB being transmitted by the at least one second access object

[0718] The transmission mode of the SIB 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 (long SIB transmission period), 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 SIB1s

[0719] 6) 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:

[0720] Whether the at least one second access object performs RACH listening

[0721] 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;

[0722] 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 short for Physical Random Access Channel Occasion.

[0723] 7) The relevant configuration information of the SSB sent after being successfully triggered by WUS, which may specifically include at least one of the following:

[0724] After being successfully triggered by WUS, at least one of the frequency point for the at least one second access object to send the SSB, the period for sending the SSB, and the number of SSBs within one transmission period;

[0725] 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 to the SSB within this listening window;

[0726] 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;

[0727] After being successfully triggered by 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;

[0728] 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;

[0729] After being successfully triggered by WUS, the time domain resource position of the first SSB or the first SIB 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;

[0730] After the successful triggering of WUS, the transmission mode of the at least one second access object to send SSB, and the transmission mode includes one of a normal transmission mode, an energy-saving transmission mode (e.g., only sending 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.

[0731] 8) The relevant configuration information of the SIB sent after the successful triggering of WUS, which may specifically include at least one of the following:

[0732] After the successful triggering of WUS, the transmission period of the at least one second object to send SIB, and the configuration information of at least one of the Physical Downlink Control Channel (PDCCH) and the Control Resource Set (CORESET) carrying the scheduling information of the SIB;

[0733] After the successful triggering of WUS, the listening window for the at least one second object to send SIB, that is, the UE listens for SIB within this listening window;

[0734] After the successful triggering of WUS, one of the transmission time length, the number of transmission times, and the number of transmission periods of the at least one second object to send SIB, such as one of the transmission time length, the number of transmission times, and the number of transmission periods of SIB1;

[0735] After the successful triggering of WUS, the frequency domain resource information of the at least one second object to send SIB, and the frequency domain resource information includes at least one of the starting position of the frequency domain resource (e.g., the carrier, BWP, or the position in the frequency band where it is located), the number of frequency bands occupied by the frequency domain resource, and the bandwidth size of the signal;

[0736] After the successful triggering of WUS, the time domain resource information of the at least one second object to send SIB, and the time domain resource information includes at least one of the time domain resource position (e.g., the offset relative to the synchronization / broadcast channel), the size of the listening window, the period of the listening window, the number of time domain repeated transmissions, and the time domain repeated transmission mode;

[0737] After the successful triggering of WUS, the transmission mode of the at least one second object to send SIB, and the transmission mode includes one of a normal transmission mode, an energy-saving transmission mode, an aggregated transmission mode, a long-period transmission mode, and an on-demand transmission mode. Among them, the energy-saving transmission mode may be a simplified transmission mode that only sends core configuration information such as RACH, and the aggregated transmission mode may be a transmission mode where there is no time domain gap between multiple SIB1s.

[0738] 9) Related configuration information for RACH monitoring after successful triggering by WUS, which may specifically include:

[0739] After successful triggering by WUS, at least one of the following for the at least one second access object to monitor RACH: the period of monitoring RACH, the number of RACHs to monitor, 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. Among them, the monitoring mode includes one of the normal monitoring mode, simplified monitoring mode (e.g., reducing RO opportunities), aggregated monitoring mode (no time-domain interval between multiple ROs), and on-demand monitoring mode.

[0740] 10) Characteristic information of the at least one second access object, which may specifically include at least one of the following:

[0741] The identification information of the at least one second access object;

[0742] Whether the at least one second access object can use the first access object as a reference access object;

[0743] Whether the at least one second access object is co-located with the first access object;

[0744] Whether the at least one second access object is in the same Timing Advance Group (TAG) as the first access object;

[0745] Whether the at least one second access object has a Quasi CoLocation (QCL) relationship with the first access object;

[0746] The reference access object of the at least one second access object;

[0747] The access object co-located with the at least one second access object;

[0748] The access object in the same TAG as the at least one second access object;

[0749] The access object having a QCL relationship with the at least one second access object;

[0750] Whether the at least one second access object is in the prohibited Bar state;

[0751] The priority of the at least one second access object when the UE performs random access channel selection;

[0752] Whether the at least one second access object is set to the Bar state for UEs of the first type, where the first type includes at least one of Reduced Capability (Redcap), Non-Terrestrial Network (NTN), and Network Energy Saving (NES) function;

[0753] The eigenvalue N of the UE ID allowed to perform 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;

[0754] Whether the at least one second access object supports UE residence;

[0755] Whether the at least one second access object is a suitable cell;

[0756] Whether the at least one second access object supports cell selection and / or cell reselection;

[0757] Partial system information of the at least one second access object, where the partial system information includes 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.

[0758] Wherein, the WUS configuration information included in the first information may include at least one of the following:

[0759] 1) Synchronization reference configuration information of WUS, which may specifically include at least one of the following:

[0760] At least one of the SSB, Channel State Information-Reference Signal (CSI-RS), and tracking reference signal (TRS) of the first access object;

[0761] GPS timing.

[0762] 2) Resource configuration information of WUS, which may specifically include at least one of the following:

[0763] Time-domain resource information;

[0764] Frequency domain resource information;

[0765] Signal sequence configuration information. For example, the preamble group 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.

[0766] 3) Power configuration information of WUS, which can specifically include at least one of the following:

[0767] Initial power of the signal;

[0768] Signal power ramp step.

[0769] 4) Repetition transmission configuration information of WUS, which can specifically include at least one of the following:

[0770] Number of repetitions of a single signal transmission;

[0771] Maximum number of repetitions of channel transmission.

[0772] 5) Spatial domain parameter configuration information of WUS, which can specifically include at least one of the following:

[0773] Correspondence between WUS and the SSB of the first access object;

[0774] Correspondence between WUS and the SSB of the at least one second access object;

[0775] Correspondence between WUS and the SSB of the second access object group.

[0776] 6) Transmission timer configuration information of WUS. The timer is used to avoid overly frequent WUS transmissions. Generally, the timer is started after WUS is transmitted, and WUS is not allowed to be repeatedly transmitted before the timer expires.

[0777] Among them, the form of the WUS signal includes at least one of the following:

[0778] RACH;

[0779] Msg1;

[0780] Preamble sequence;

[0781] Sounding Reference Signal (SRS);

[0782] Physical Uplink Control Channel (PUCCH).

[0783] Among them, the configuration method of the resource configuration information of the WUS includes at least one of the following:

[0784] Configure a signal resource list in the first information, where 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;

[0785] Configure a signal resource list in the first information, where each element of the signal resource list corresponds explicitly to the second access object or the second access object group index;

[0786] 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 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;

[0787] Configure one or more signal resources for the second access object or the second access object group in the first information.

[0788] Among them, the signal resources configured by the resource configuration information of the WUS include at least one of the following:

[0789] 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 as the common RACH on the first access object;

[0790] 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 / SIB 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;

[0791] The time-frequency resources are the time-frequency resources of the dedicated SRS / PUCCH on the first access object or the second access object group for triggering SSB / SIB transmission and / or RACH listening.

[0792] Among them, the grouping method of the second access object group includes at least one of the following:

[0793] Configured by the network side device;

[0794] Specified by the protocol.

[0795] Among them, the grouping rules of the second access object group include at least one of the following:

[0796] The second access objects in the same frequency band are grouped as one group;

[0797] The second access objects in the same frequency band interval are grouped as one group;

[0798] The second access objects with at least one of the Initial BWP, active BWP, SSB, and SCS being the same are grouped as one group;

[0799] The second access objects with the same transmission mode are grouped as 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.;

[0800] The co-located second access objects are grouped as one group;

[0801] The second access objects with the same SSB transmission period are grouped as one group.

[0802] The access object selection module 902 is configured to select, according to the first information and the first rule, a target access object for performing a first operation from the first access object and the second access object groups, 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.

[0803] One or more access objects that the network side device indicates or configures for the terminal to randomly access;

[0804] By default, the access object for which the terminal is to perform random access is the first access object;

[0805] The Bar status information of the second access object;

[0806] The index value of the second access object;

[0807] The center frequency of the second access object;

[0808] The subcarrier spacing (SCS) of the second access object;

[0809] The identifier of the second access object;

[0810] The frequency interval between the second access object and the first access object;

[0811] Whether the second access object performs normal RACH listening;

[0812] Whether the second access object normally transmits SSB;

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

[0814] Whether the second access object meets at least two of the following conditions: normal RACH listening, normal SSB sending, and normal SIB sending;

[0815] The number of times WUS needs to be sent to the second access object;

[0816] The priority of the second access object;

[0817] 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);

[0818] A randomly generated access object index;

[0819] The weight value of the second access object;

[0820] A randomly generated access object weight value;

[0821] Whether the first access object is a suitable cell;

[0822] Whether the second access object is a suitable cell.

[0823] 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:

[0824] ① The transmission mode of the second access object, where the transmission mode includes one of whether to send SSBs normally, whether to support on-demand SSB sending, and whether to listen to RACH normally. For example, the relationship between the priority of the second access object and the transmission mode can be:

[0825] The priority of the second access object that sends SSBs normally > the priority of the second access object that does not send SSBs with the first access object as a reference > the priority of the second access object that sends SSBs on demand;

[0826] The priority of the second access object that sends SIBs normally > the priority of the second access object that sends SIBs on demand;

[0827] The priority of the second access object that listens to RACH normally > the priority of the second access object that listens to RACH on demand.

[0828] ② The frequency band interval between the second access object and the first access object;

[0829] ③ The number of the second access object.

[0830] The following gives two examples to illustrate how the access object selection module 902 specifically 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 also be involved in the following specific embodiments, which will not be elaborated here for the time being. Please refer to the following for details.

[0831] The first example

[0832] The access object selection module 902 can specifically be used for:

[0833] Determine whether the first access object is a suitable cell;

[0834] When the first access object is a suitable cell, select the first access object as the target access object;

[0835] When the first access object is not a suitable cell, perform one of the first step, the second step, and the third step.

[0836] Among them, the first step includes:

[0837] According to the reference signal measurement results corresponding to at least one second access object in the second access object group and the system information SIB sent by the at least one second access object triggered by WUS, determine whether the at least one second access object is a suitable cell;

[0838] When one or more second access objects in 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.

[0839] Among them, the second step includes:

[0840] According to the reference signal measurement results corresponding to at least one second access object in the second access object group and the partial SIB 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;

[0841] When one or more of the at least one second access object is a suitable cell, select a suitable cell from the at least one second access object according to the first rule. And when the terminal fails to obtain the SIB of the suitable cell, send a WUS for triggering the SIB transmission to the suitable cell, and use the suitable cell as the target access object for performing the first operation after receiving the SIB.

[0842] Among them, the third step includes:

[0843] Ignore the second access object and find other suitable cells as the target access objects for the operations to be performed.

[0844] Further, the finding of other suitable cells as the target access objects for performing the first operation may include:

[0845] 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 the operations to be performed;

[0846] 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 the operations to be performed, where the third access object group includes access objects that meet the third condition;

[0847] Among them, the third condition includes at least one of the following:

[0848] Taking the first access object as a reference;

[0849] Collocated with the first access object;

[0850] Being a continuous access object on the same frequency band as the first access object.

[0851] The second example

[0852] The access object selection module 902 can specifically be used to: execute the fourth step or the fifth step.

[0853] Among them, the fourth step includes:

[0854] Determine whether the first access object is a suitable cell according to the reference signal measurement result of the first access object and the system information SIB of the first access object;

[0855] Determine whether at least one of the second access objects in the second access object group is a suitable cell according to the reference signal measurement result of at least one of the second access objects in the second access object group and the partial SIB of at least one of the second access objects included in the first information;

[0856] When the first access object is a suitable cell and one or more of 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 according to a first rule;

[0857] If the suitable cell is the first access object, use the suitable cell as the target access object for performing a first operation;

[0858] If the suitable cell is a second access object, send a WUS that triggers SIB transmission to the suitable cell, and use the suitable cell as the target access object for performing a first operation after receiving the SIB.

[0859] Among them, the fifth step includes:

[0860] Determine whether the first access object is a suitable cell according to the reference signal measurement result of the first access object and the SIB of the first access object;

[0861] Determine whether at least one of the second access objects in the second access object group is a suitable cell according to the reference signal measurement result of at least one second access object in the second access object group and the SIB sent by the at least one second access object triggered by the WUS;

[0862] When the first access object is a suitable cell and one or more of 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 a first operation.

[0863] In the embodiments of the present application, the reference signal corresponding to one 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 one 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, 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.

[0864] Figure 8A random access device provided by the illustrated embodiment enables the network-side device to provide first information about a second access object group to the terminal through a first access object. As a result, the terminal can select a target access object for residence or random access from the first access object and the second access object group according to the first information and a first rule. Instead of the second access object continuously sending information such as SSB and SIB, it sends SSB / SIB on demand or performs RACH listening on demand. Therefore, while saving energy on the network side, the network-side capacity can be guaranteed to the greatest extent possible.

[0865] Optionally, as Figure 10 illustrated, a random access device 900 provided by an embodiment of the present application may further include:

[0866] A first WUS sending module 903, 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 SSB / SIB, or WUS configuration information for triggering adaptive adjustment of SSB / SIB 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 adaptive adjustment of RACH listening of at least one second access object, where the WUS is used to trigger the target access object to perform at least one of sending SSB, sending SIB, and listening to RACH.

[0867] In an example, the first WUS sending module 903 is configured to: send a WUS for the target access object when a first condition is met.

[0868] Wherein, the first condition may include at least one of the following:

[0869] 1) The first access object is not a suitable cell;

[0870] 2) The target access object is a suitable cell;

[0871] 3) Perform intra-frequency or inter-frequency measurement on the target access object;

[0872] 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 SSB, not sending SIB, not listening to RACH, sending energy-saving SSB (such as Sparse SSB), sending energy-saving SIB (such as Sparse SIB), and energy-saving listening to RACH (such as Sparse RACH monitoring), and the energy-saving SSB includes one of lightweight SSB, simplified SSB, sparse SSB, and long-period SSB;

[0873] 5) The terminal is sensitive to access latency;

[0874] 6) The terminal is in the process of recovering from a link failure.

[0875] 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.

[0876] Wherein, the second energy-saving state may include at least one of the following:

[0877] Not sending SIB, normally sending SSB, and performing normal RACH listening;

[0878] Not sending SIB, not sending SSB or sending energy-saving SSB (such as simplified SSB or sparse SSB, etc.), with the first access object as a reference, and performing normal RACH listening;

[0879] Not sending SIB, normally sending SSB, and not performing normal RACH listening;

[0880] Not sending SIB, not sending SSB or sending energy-saving SSB (such as simplified SSB or sparse SSB, etc.), and not performing normal RACH listening;

[0881] Sending SIB, normally sending SSB, and not performing normal RACH listening;

[0882] Sending SIB, not sending SSB or sending energy-saving SSB, and not performing normal RACH listening;

[0883] Sending SIB, normally sending SSB, and performing normal RACH listening;

[0884] Sending SIB, not sending SSB or sending energy-saving SSB, and performing normal RACH listening;

[0885] Wherein, the energy-saving SSB includes one of lightweight SSB, simplified SSB, sparse SSB, and long-period SSB.

[0886] In the first example, the first WUS sending module 903 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 an SSB and / or send an SIB, and the other is to trigger the target access object to listen for a RACH.

[0887] In the second example, the first WUS sending module 903 can be used to: send a first WUS for the target access object, and the first WUS is used to trigger the target access object to send an SSB and / or send an SIB; and send a second WUS for the target access object, where the second WUS is used to trigger the target access object to listen for a RACH.

[0888] Exemplarily, the first WUS sending module 903 can be used for one of the following:

[0889] After Z time slots / symbols / milliseconds of sending the first WUS, start sending the second WUS for the target access object;

[0890] After X time slots / symbols / milliseconds of receiving the feedback for the first WUS, start sending the second WUS for the target access object;

[0891] After Y time slots / symbols / milliseconds of receiving the first SSB or the first SIB sent after successfully triggering the target access object, start sending the second WUS for the target access object;

[0892] When the number of transmissions of the first WUS reaches the maximum value, send the second WUS for the target access object;

[0893] Start a first timer after sending the first WUS, and after the first timer times out, send the second WUS for the target access object.

[0894] Figure 10 A random access device 900 provided by the illustrated 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 guaranteed to the greatest extent.

[0895] Optionally, as Figure 11 shown, a random access device 900 provided by an embodiment of the present application may further include:

[0896] The SSB monitoring module 904 is configured to monitor the SSB / SIB sent by the target access object when the WUS is used to trigger the SSB / SIB transmission.

[0897] Exemplarily, the SSB monitoring module 904 may be specifically configured to perform one of the following:

[0898] Start a third timer after sending the WUS, and start monitoring the SSB / SIB sent by the target access object after the third timer expires;

[0899] Start monitoring the SSB / SIB sent by the target access object after C time slots / symbols / milliseconds after sending the WUS;

[0900] Start monitoring the SSB / SIB sent by the target access object in the next time slot after sending the WUS;

[0901] Monitor the SSB / SIB sent by the target access object within the SSB monitoring window configured in the first information.

[0902] Figure 11 A random access device 900 provided by the illustrated embodiment can trigger a target access object (a second access object) to send SSB / SIB on-demand, thereby preparing for RACH of the target access object and increasing the capacity of the network side.

[0903] Optionally, as Figure 12 shown, a random access device 900 provided by an embodiment of the present application may further include:

[0904] An operation initiation module 905, configured to initiate the first operation to the target access object.

[0905] Exemplarily, the target access object is a second access object, and the operation initiation module 905 (the time point for initiating the first operation to the target access object) may be specifically configured to perform one of the following:

[0906] Start a second timer after sending the WUS to the target access object, and initiate the first operation to the target access object after the second timer expires (such as initiating a RACH. Correspondingly, the WUS may be the same WUS used to trigger the SSB transmission and RACH monitoring, or the second WUS described above);

[0907] 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);

[0908] 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).

[0909] Optionally, a random access device 900 provided by an embodiment of the present application may further include:

[0910] A second WUS sending module, configured to resend a wake-up signal WUS for the target access object when a second condition is met.

[0911] Wherein, the second condition may include but is not limited to at least one of the following:

[0912] 1) SSB detection fails;

[0913] 2) The number of random access attempts reaches the maximum value;

[0914] The number of WUS transmissions is less than or equal to a preset maximum number of transmissions;

[0915] 3) No feedback for the previous WUS is received;

[0916] 4) The previous WUS is used to trigger the transmission of SSB / SIB. After receiving the feedback of the previous WUS signal, resend the WUS for triggering RACH listening (that is, resending the WUS is to trigger RACH listening);

[0917] 5) No feedback for the previous WUS is received before the timer expires.

[0918] Optionally, the resend WUS signal has at least one of the following characteristics:

[0919] 1) The signal power increases;

[0920] 2) The time interval from the previous WUS transmission is greater than a preset time interval;

[0921] 3) The frequency domain resources and sequence resources are the same as those of the previous WUS.

[0922] It should be noted that Figure 9 The shown device can achieve Figure 2The method shown can achieve the same technical effects, so the description is relatively simple. For related parts, reference can be made to the description of the embodiment shown in Figure 2 above.

[0923] As Figure 13 shown, an embodiment of the present application provides a communication device 1300, which may include: an information sending module 1301.

[0924] The information sending module 1301 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 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).

[0925] 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. The following mainly takes a multi-carrier scenario as an example for illustration.

[0926] In one implementation manner, 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.

[0927] In another implementation manner, 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 send SSB (SSB-less carrier), or the second access object is a carrier that supports on-demand sending of SSB (on-demand SSB carrier). Among them, the first information may be sent by the first access object through a broadcast message; or, by default, the first information is the same as the corresponding information of the first access object.

[0928] Among them, the first information corresponds to at least one second access object in the second access object group, and the first information may include at least one of the following:

[0929] 1) Wake-up signal 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;

[0930] 2) WUS configuration information for triggering at least one of the second access objects to send an SIB, or WUS configuration information for triggering SIB adaptation adjustment of at least one of the second access objects;

[0931] 3) 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;

[0932] 4) Related 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:

[0933] Whether at least one of the second access objects is sending an SSB;

[0934] 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;

[0935] The transmission mode of the SSB being sent by at least one of the second access objects, 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 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 a Primary Synchronization Signal (PSS) and a Secondary Synchronization Signal (SSS), and the compact transmission mode may be a transmission mode where there is no time domain gap between multiple SSBs.

[0936] 5) Related configuration information of the SIB currently being sent by at least one of the second access objects, which may specifically include at least one of the following:

[0937] Whether at least one of the second access objects sends an SIB;

[0938] The transmission period of the SIB being sent by at least one of the second access objects;

[0939] Configuration information of at least one of the physical downlink control channel PDCCH and control resource set associated with the SIB being sent by the at least one second access object;

[0940] The transmission mode of the SIB being sent 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 (long SIB transmission period), and an on-demand transmission mode. Among them, the energy-saving transmission mode can be a simplified transmission mode that only sends 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 SIB1s.

[0941] 6) 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:

[0942] Whether the at least one second access object performs RACH listening;

[0943] 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;

[0944] 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.

[0945] 7) Configuration information related to the SSB sent after successful triggering by WUS, which may specifically include at least one of the following:

[0946] After successful triggering by WUS, at least one of the frequency point for the at least one second access object to send the SSB, the period for sending the SSB, and the number of SSBs within one transmission period;

[0947] After the successful triggering of WUS, the at least one second access object sends a listening window for SSB, that is, the UE listens for SSB within this listening window;

[0948] After the successful triggering of WUS, the at least one time domain resource index or the position of at least one time domain resource where the at least one second access object actually sends SSB;

[0949] After the successful triggering of 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 transmission times, and the number of SSB transmission cycles;

[0950] 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;

[0951] After the successful triggering of WUS, the time domain resource position of the first SSB or the first SIB sent by the at least one second access object. For example, it is sent in the nearest SSB cycle of X time slots / symbols after the triggering signal (WUS) transmission time;

[0952] After the successful triggering of WUS, the transmission mode of the SSB sent by the at least one second access object, and the transmission mode includes one of normal transmission mode, energy-saving transmission mode (such as only sending PSS and SSS), aggregation transmission mode (such as no time domain interval between multiple SSBs), long cycle transmission mode (longer SSB cycle), and on-demand transmission mode.

[0953] 8) The relevant configuration information of the SIB sent after the successful triggering of WUS, which may specifically include at least one of the following:

[0954] After the successful triggering of WUS, the transmission cycle of the SIB sent by the at least one second object, and the configuration information of at least one of the Physical Downlink Control Channel (PDCCH) and the Control Resource Set (CORESET) carrying the scheduling information of this SIB;

[0955] After the successful triggering of WUS, the listening window for the SIB sent by the at least one second object, that is, the UE listens for SIB within this listening window;

[0956] After the successful triggering of WUS, one of the transmission time length, the number of transmissions, and the number of transmission cycles of the SIB sent by the at least one second object, such as one of the transmission time length, the number of transmissions, and the number of transmission cycles of SIB1;

[0957] After the successful triggering of WUS, the at least one second object sends the frequency-domain resource information of the SIB, where the frequency-domain resource information includes at least one of the starting position of the frequency-domain resource (e.g., the carrier, BWP, or the position in the frequency band where it is located), the number of frequency bands occupied by the frequency-domain resource, and the bandwidth size of the signal;

[0958] After the successful triggering of WUS, the at least one second object sends the time-domain resource information of the SIB, where the time-domain resource information includes at least one of the time-domain resource position (e.g., the offset relative to the synchronization / broadcast channel), the size of the listening window, the period of the listening window, the number of time-domain repeated transmissions, and the time-domain repeated transmission mode;

[0959] After the successful triggering of WUS, the at least one second object sends the transmission mode of the SIB, where the transmission mode includes one of the normal transmission mode, the energy-saving transmission mode, the aggregation transmission mode, the long-period transmission mode, and the on-demand transmission mode. Among them, the energy-saving transmission mode can be a simplified transmission mode that only sends core configuration information such as RACH, and the aggregation transmission mode can be a transmission mode where there is no time-domain gap between multiple SIB1s.

[0960] 9) The relevant configuration information for RACH listening after the successful triggering of WUS, specifically, may include:

[0961] After the successful triggering of WUS, the at least one second access object listens to at least one of the period of RACH, the number of RACHs listened to, the frequency-domain resource configuration information of RACH listening, the time-domain resource configuration information of RACH listening, and the listening mode of RACH listening. Among them, the listening mode includes one of the normal listening mode, the simplified listening mode (e.g., reducing the RO opportunity), the aggregation listening mode (no time-domain gap between multiple ROs), and the on-demand listening mode.

[0962] 10) The characteristic information of the at least one second access object, specifically, may include at least one of the following:

[0963] The identification information of the at least one second access object;

[0964] Whether the at least one second access object can use the first access object as a reference access object;

[0965] Whether the at least one second access object is co-located with the first access object;

[0966] Whether the at least one second access object is in the same Timing Advance Group (TAG) as the first access object;

[0967] whether the at least one second access object has a Quasi CoLocation (QCL) relationship with the first access object;

[0968] the reference access object of the at least one second access object;

[0969] the access object co-located with the at least one second access object;

[0970] the access object in the same TAG as the at least one second access object;

[0971] the access object having a QCL relationship with the at least one second access object;

[0972] whether the at least one second access object is in a barred state;

[0973] the priority of the at least one second access object when the UE performs random access channel selection;

[0974] whether the at least one second access object is set to a barred state for a 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;

[0975] 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;

[0976] whether the at least one second access object supports UE residence;

[0977] whether the at least one second access object is a suitable cell;

[0978] whether the at least one second access object supports cell selection and / or cell reselection;

[0979] partial system information of the at least one second access object, where the partial system information includes 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.

[0980] Among them, the WUS configuration information included in the first information may include at least one of the following:

[0981] 1) Synchronization reference configuration information of WUS, which may specifically include at least one of the following:

[0982] At least one of the SSB, Channel State Information-Reference Signal (CSI-RS), and tracking reference signal (TRS) of the first access object;

[0983] GPS timing.

[0984] 2) Resource configuration information of WUS, which may specifically include at least one of the following:

[0985] Time-domain resource information;

[0986] Frequency-domain resource information;

[0987] 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.

[0988] 3) Power configuration information of WUS, which may specifically include at least one of the following:

[0989] Initial signal power;

[0990] Signal power ramp step.

[0991] 4) Repetition transmission configuration information of WUS, which may specifically include at least one of the following:

[0992] Number of repetitions of a single signal transmission;

[0993] Maximum number of repetitions of channel transmission.

[0994] 5) Spatial domain parameter configuration information of WUS, which may specifically include at least one of the following:

[0995] Correspondence between WUS and the SSB of the first access object;

[0996] Correspondence between WUS and the SSB of the at least one second access object;

[0997] Correspondence between WUS and the SSB of the second access object group.

[0998] 6) Configuration information of the transmission timer of the Wake-Up Signal (WUS). The timer is used to avoid overly frequent transmission of the WUS. Generally, the timer is started after the WUS is transmitted, and repeated transmission of the WUS is not allowed before the timer expires.

[0999] Among them, the form of the WUS signal includes at least one of the following:

[1000] Random Access Channel (RACH);

[1001] Message 1 (Msg1);

[1002] Preamble sequence;

[1003] Sounding Reference Signal (SRS);

[1004] Physical Uplink Control Channel (PUCCH).

[1005] Among them, the configuration method of the resource configuration information of the WUS includes at least one of the following:

[1006] 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. One element in the signal resource list includes one or more resources;

[1007] 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;

[1008] 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. The resource number is determined according to at least one of time domain, frequency domain, and spatial domain;

[1009] Configure one or more signal resources for the second access object or the second access object group in the first information.

[1010] Among them, the signal resources configured by the resource configuration information of the WUS include at least one of the following:

[1011] 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;

[1012] The time-frequency resource is the time-frequency resource of a dedicated RACH on the first access object or the second access object group, which is specifically used to trigger SSB / SIB transmission and / or RACH 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 it can be a partial resource of the time-frequency resource of the common RACH on the first access object;

[1013] The time-frequency resource is the time-frequency resource of a dedicated SRS / PUCCH on the first access object or the second access object group, which is used to trigger SSB / SIB transmission and / or RACH listening.

[1014] Among them, the grouping method of the second access object group includes at least one of the following:

[1015] Configured by the network-side device;

[1016] Specified by the protocol.

[1017] Among them, the grouping rules of the second access object group include at least one of the following:

[1018] The second access objects in the same frequency band (band) are grouped into one group;

[1019] The second access objects in the same frequency band interval are grouped into one group;

[1020] 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;

[1021] 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 send SSB, whether to perform RACH listening, and whether to support on-demand SSB, etc.;

[1022] The co-located second access objects are grouped into one group;

[1023] The second access objects with the same SSB transmission period are grouped into one group.

[1024] Regarding how the terminal selects the target access object to perform 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.

[1025] It should be noted that Figure 13 the illustrated device can implement Figure 8 the illustrated method and can achieve the same technical effects. Therefore, the description is relatively simple, and the relevant parts can be referred to the above forFigure 8 Description of the illustrated embodiment.

[1026] Optionally, a communication device 1300 provided by an embodiment of the present application may further include:

[1027] A first WUS receiving module, configured to, 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 / SIB, or WUS configuration information for triggering adaptive adjustment of the SSB / SIB of at least one second access object, and the first information includes WUS configuration information for triggering at least one second access object to monitor a random access channel (RACH), or WUS configuration information for triggering adaptive adjustment of the RACH monitoring of at least one second access object, the target access object receives a wake-up signal (WUS), where the WUS is used to trigger the target access object to perform at least one of sending an SSB, sending an SIB, and monitoring a RACH.

[1028] In one example, the target access object receives a wake-up signal WUS, and the WUS is sent by the terminal when a first condition is met.

[1029] Wherein, the first condition may include at least one of the following:

[1030] 1) The first access object is not a suitable cell;

[1031] 2) The target access object is a suitable cell;

[1032] 3) Perform intra-frequency or inter-frequency measurement on the target access object;

[1033] 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 monitoring 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 monitoring of 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;

[1034] 5) The terminal is sensitive to access latency;

[1035] 6) The terminal is in the process of recovering from a link failure.

[1036] 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 the second power-saving state.

[1037] Wherein, the second power-saving state may include at least one of the following:

[1038] Not sending SIB, normally sending SSB, and performing normal RACH listening;

[1039] Not sending SIB, not sending 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;

[1040] Not sending SIB, normally sending SSB, and not performing normal RACH listening;

[1041] Not sending SIB, not sending SSB or sending a power-saving SSB (such as a simplified SSB or a sparse SSB, etc.), and not performing normal RACH listening;

[1042] Sending SIB, normally sending SSB, and not performing normal RACH listening;

[1043] Sending SIB, not sending SSB or sending a power-saving SSB, and not performing normal RACH listening;

[1044] Sending SIB, normally sending SSB, and performing normal RACH listening;

[1045] Sending SIB, not sending SSB or sending a power-saving SSB, and performing normal RACH listening;

[1046] Wherein, the power-saving SSB includes one of a lightweight SSB, a simplified SSB, a sparse SSB, and a long-period SSB.

[1047] In the first example, the first WUS receiving module is configured to: the target access object receives a 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 / or send SIB, and the other is to trigger the target access object to listen for RACH.

[1048] In the second example, the first WUS receiving module is configured to: the target access object receives a first WUS for the target access object, and the first WUS is used to trigger the target access object to send SSB and / or send SIB; the target access object receives a second WUS for the target access object, wherein the second WUS is used to trigger the target access object to listen for RACH.

[1049] Exemplarily, the first WUS receiving module is used for one of the following:

[1050] The target access object receives the second WUS for the target access object that starts to be sent Z time slots / symbols / milliseconds after the terminal sends the first WUS.

[1051] The target access object receives the second WUS for the target access object that starts to be sent X time slots / symbols / milliseconds after the terminal receives the feedback for the first WUS.

[1052] The target access object receives the second WUS for the target access object that starts to be sent Y time slots / symbols / milliseconds after the terminal receives the first SSB or the first SIB sent after successfully triggering the target access object.

[1053] The target access object receives the second WUS for the target access object sent when the number of transmissions of the first WUS by the terminal reaches the maximum value.

[1054] The target access object receives the second WUS for the target access object sent after the first timer expires, where the first timer is started after the first WUS is sent.

[1055] A communication device 1300 provided in 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 ensured to the greatest extent.

[1056] Optionally, a communication device 1300 provided in an embodiment of the present application may further include: a signal sending module, configured to, when the WUS is used to trigger the target access object to send an SSB / SIB, the target access object sends an SSB / SIB. So that the target access object sends an SSB / SIB on demand under the trigger of the WUS, thereby preparing for the UE to access the target access object and increasing the capacity of the network side.

[1057] Optionally, a communication device 1300 provided in an embodiment of the present application may further include: an operation receiving module, configured to listen for the first operation initiated by the terminal for the target access object.

[1058] Optionally, a communication device 1300 provided by an embodiment of the present application may further include: a second WUS receiving module, configured to receive a wake-up signal WUS for the target access object retransmitted by the terminal when a second condition is satisfied, so as to improve the success rate of performing a first operation.

[1059] Wherein, the second condition may include but is not limited to at least one of the following:

[1060] 1) SSB detection fails;

[1061] 2) The number of random access attempts reaches the maximum value;

[1062] The number of transmissions of the WUS is less than or equal to a preset maximum number of transmissions;

[1063] 3) No feedback for the previous WUS is received;

[1064] 4) The previous WUS is used to trigger the transmission of SSB / SIB. After receiving the feedback for the previous WUS signal, a WUS for triggering RACH monitoring is retransmitted (that is, the WUS is retransmitted again to trigger RACH monitoring);

[1065] 5) No feedback for the previous WUS is received before the timer times out.

[1066] Optionally, the retransmitted WUS signal has at least one of the following characteristics:

[1067] 1) The signal power increases;

[1068] 2) The time interval from the previous WUS transmission is greater than a preset time interval;

[1069] 3) The frequency domain resources and sequence resources are the same as those of the previous WUS.

[1070] It should be noted that the communication device in the embodiment of the present application may 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 may be a terminal or other devices other than the terminal. Exemplarily, the terminal may include but is not limited to the types of the terminal 11 listed above, and other devices may be a server, a network attached storage (NAS), etc., which are not specifically limited in the embodiment of the present application.

[1071] Optionally, as Figure 14As shown in the figure, an embodiment of the present application further provides a communication device 1400, including a processor 1401 and a memory 1402. A program or instruction that can run on the processor 1401 is stored on the memory 1402. For example, when the communication device 1400 is a terminal, when the program or instruction is executed by the processor 1401, each step of the above-mentioned random access method embodiment is implemented, and the same technical effect can be achieved. When the communication device 1400 is a network-side device, when the program or instruction is executed by the processor 1401, each step of the above-mentioned communication method embodiment is implemented, and the same technical effect can be achieved. To avoid repetition, details are not described here.

[1072] An embodiment of the present application further provides 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. Among them, the second access object group includes one or more second access objects different from the first access object; the processor is used to select a target access object for performing a first operation from the first access object and the second access object group 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). This terminal embodiment corresponds to the above-mentioned terminal-side method embodiment. Each implementation process and implementation method of the above method embodiment can be applied to this terminal embodiment, and the same technical effect can be achieved. Specifically, Figure 15 A schematic diagram of the hardware structure of a terminal for implementing an embodiment of the present application.

[1073] The terminal 1500 includes, but is not limited to, at least some components such as a radio frequency unit 1501, a network module 1502, an audio output unit 1503, an input unit 1504, a sensor 1505, a display unit 1506, a user input unit 1507, an interface unit 1508, a memory 1509, and a processor 1510.

[1074] Those skilled in the art can understand that the terminal 1500 may further include a power supply (such as a battery) for supplying power to each component. The power supply can be logically connected to the processor 1510 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 15 The terminal structure shown in the figure does not limit the terminal. The terminal may include more or fewer components than shown in the figure, or combine some components, or have different component arrangements, which will not be elaborated here.

[1075] It should be understood that in the embodiments of the present application, the input unit 1504 may include a Graphics Processing Unit (GPU) 15041 and a microphone 15042. The graphics processor 15041 processes the image data of static pictures or videos obtained by an image capture device (such as a camera) in the video capture mode or the image capture mode. The display unit 1506 may include a display panel 15061, and the display panel 15061 may be configured in the form of, for example, a liquid crystal display, an organic light-emitting diode, etc. The user input unit 1507 includes at least one of a touch panel 15071 and other input devices 15072. The touch panel 15071 is also referred to as a touch screen. The touch panel 15071 may include two parts: a touch detection device and a touch controller. The other input devices 15072 may include, but are not limited to, a physical keyboard, function keys (such as volume control keys, switch keys, etc.), a trackball, a mouse, a joystick, which will not be elaborated herein.

[1076] In the embodiments of the present application, after receiving the downlink data from the network-side device, the radio frequency unit 1501 may transmit it to the processor 1510 for processing; in addition, the radio frequency unit 1501 may send the uplink data to the network-side device. Generally, the radio frequency unit 1501 includes, but is not limited to, an antenna, an amplifier, a transceiver, a coupler, a low-noise amplifier, a duplexer, etc.

[1077] The memory 1509 can be used to store software programs or instructions and various data. The memory 1509 may mainly include a first storage area for storing programs or instructions and a second storage area for storing data. Among them, the first storage area can 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 1509 can include volatile memory or non-volatile memory, or the memory 1509 can include both volatile and non-volatile memory. Among them, the non-volatile memory can 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 can 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 1509 in the embodiments of the present application includes, but is not limited to, these and any other suitable types of memory.

[1078] The processor 1510 may include one or more processing units; optionally, the processor 1510 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 1510 either.

[1079] Among them, the radio frequency unit 1501 can be used 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.

[1080] Among them, the processor 1510 can be used to select a target access object for performing a first operation from the first access object and the second access object group according to the first information and the first rule, 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).

[1081] In the embodiment of the present application, since the terminal 1500 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, it is not necessary for the second access object to continuously send information such as SSB and SIB. Therefore, while saving energy on the network side, the capacity of the network side can be guaranteed to the greatest extent.

[1082] 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 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 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). 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 the same technical effect can be achieved.

[1083] Specifically, the embodiment of the present application further provides a network-side device. As Figure 16 shown, the network-side device 1600 includes: an antenna 1601, a radio frequency device 1602, a baseband device 1603, a processor 1604, and a memory 1605. The antenna 1601 is connected to the radio frequency device 1602. In the uplink direction, the radio frequency device 1602 receives information through the antenna 1601 and sends the received information to the baseband device 1603 for processing. In the downlink direction, the baseband device 1603 processes the information to be sent and sends it to the radio frequency device 1602. The radio frequency device 1602 processes the received information and then sends it out through the antenna 1601.

[1084] In the above embodiments, the method executed by the network-side device can be implemented in the baseband device 1603, and the baseband device 1603 includes a baseband processor.

[1085] The baseband device 1603 may include, for example, at least one baseband board, and a plurality of chips are arranged on the baseband board, such as Figure 16As shown, one of the chips, for example, a baseband processor, is connected to the memory 1605 through a bus interface to call the program in the memory 1605 and execute the operations of the network device shown in the above method embodiments.

[1086] The network-side device may further include a network interface 1606, which is, for example, a common public radio interface (CPRI).

[1087] Specifically, the network-side device 16000 in the embodiments of the present invention further includes: instructions or programs stored on the memory 1605 and executable on the processor 1604. The processor 1604 calls the instructions or programs in the memory 1605 to execute Figure 13 the methods executed by the modules shown, and achieves the same technical effects. To avoid repetition, it will not be elaborated here.

[1088] 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, they implement the various processes of the above-mentioned random access method embodiments and can achieve the same technical effects. To avoid repetition, it will not be elaborated here.

[1089] Wherein, 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.

[1090] 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-mentioned random access method or communication method embodiments and can achieve the same technical effects. To avoid repetition, it will not be elaborated here.

[1091] 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, etc.

[1092] 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-mentioned random access method or communication method embodiments and can achieve the same technical effects. To avoid repetition, it will not be elaborated here.

[1093] 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, where the network-side device can be used to execute steps such as Figure 8 Steps of the communication method described.

[1094] It should be noted that in this article, the term "including", "comprising" or any other variant thereof is intended to cover non-exclusive inclusion, such that a process, method, article or device including a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including a..." 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 a 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. Additionally, features described with reference to certain examples may be combined in other examples.

[1095] Through the description of the above embodiments, those skilled in the art can clearly understand that the methods of the above embodiments 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 can be a mobile phone, computer, server, air conditioner, or network device, etc.) to execute the methods described in various embodiments of the present application.

[1096] The embodiments of the present application have been described above in conjunction with the accompanying drawings. However, the present application is not limited to the above specific embodiments. The above specific embodiments are merely illustrative and not restrictive. Under the inspiration of the present application, those of ordinary skill in the art can also make many forms without departing from the purpose of the present application and the scope protected by the claims, and all of them 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, where the second access object group includes one or more second access objects different from the first access object; The terminal selects a target access object for performing a first operation from the first access object and the second access object group 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); 2. 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 includes at least one of the following: 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 adaptive adjustment of the SSB 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; WUS configuration information for triggering at least one second access object to send a system information block (SIB), or WUS configuration information for triggering adaptive adjustment of the SIB of at least one second access object; WUS configuration information for triggering random access channel (RACH) listening of at least one second access object, or WUS configuration information for triggering adaptive adjustment of RACH listening of at least one second access object; Relevant configuration information of the SSB currently being sent by at least one second access object; Relevant configuration information of the SIB currently being sent by at least one second access object; Relevant configuration information of the RACH listening behavior currently in which at least one second access object is located; Relevant configuration information of the SSB sent after successful triggering by WUS; Relevant configuration information of the SIB sent after successful triggering by WUS; Relevant configuration information of RACH listening after successful triggering by WUS; Characteristic information of at least one second access object itself.

3. The method according to claim 1, 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 for which the terminal is to perform random access is the first access object; Bar status information of the second access object; Index value of the second access object; Center frequency of the second access object; Sub - carrier spacing (SCS) of the second access object; Identifier of the second access object; 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 normally sends an SIB; Whether the second access object satisfies at least two of normal RACH listening, normal SSB sending, and normal SIB sending; Number of times WUS needs to be sent to the second access object; Priority of the second access object; 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); 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.

4. 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 one of the first step, the second step, and the third 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 the system information SIB sent by the at least one second access object triggered by WUS; 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: 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 the partial SIB 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 according to the first rule, and when the terminal does not obtain the SIB of the suitable cell, sending a WUS triggering the SIB transmission to the suitable cell, and using the suitable cell as the target access object for performing the first operation after receiving the SIB; Wherein, the third step includes: Ignoring the second access object and looking for other suitable cells as the target access objects for performing the operation.

5. 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: Performing the fourth step or the fifth step; Wherein, the fourth step includes: Determining whether the first access object is a suitable cell according to the reference signal measurement result of the first access object and the system information 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 of at least one second access object in the second access object group and the partial SIB 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 according to the first rule; If the suitable cell is the first access object, use the suitable cell as the target access object for performing the first operation; If the suitable cell is a second access object, send a WUS that triggers the transmission of SIB to the suitable cell, and use the suitable cell as the target access object for performing the first operation after receiving the SIB; Among them, the fifth step includes: Determine whether the first access object is a suitable cell according to the reference signal measurement result of the first access object and the SIB of the first access object; 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 of at least one second access object in the second access object group and the SIB sent by the at least one second access object triggered by the WUS; 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.

6. The method according to claim 2, wherein, The target access object belongs to the second access object group, the first information includes the WUS configuration information that triggers the at least one second access object to send SSB / SIB, or the WUS configuration information that triggers the adaptive adjustment of the SSB / SIB of the at least one second access object, and the first information includes the WUS configuration information that triggers the random access channel RACH listening of the at least one second access object, or the WUS configuration information that triggers the adaptive adjustment of the RACH listening of the at least one second access object. The method further includes: When the terminal meets the first condition, send a WUS for the target access object, where the WUS is used to trigger the target access object to send at least one of SSB, send SIB, and listen to RACH; Among them, 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; Perform 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 SSB, not sending SIB, not listening to RACH, sending energy-saving SSB, sending energy-saving SIB, and energy-saving listening to RACH, and the energy-saving SSB includes one of lightweight SSB, simplified SSB, sparse SSB, and long-period SSB; The terminal is sensitive to access delay; The terminal is in the process of recovering from a link failure.

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

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

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

10. The method according to claim 8, wherein, The method further includes: The terminal initiates the first operation to the target access object; Wherein, the target access object is a second access object. The initiating the first operation to the target access object includes one of the following: After sending the WUS to the target access object, start a second timer. After the second timer expires, the terminal initiates the first operation to the target access object; 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; 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.

11. 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. Among them, the second access object group contains one or more second access objects different from the first 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.

12. The method according to claim 11, wherein, The first information corresponds to at least one second access object in the second access object group, and the first information includes at least one of the following: WUS configuration information for triggering 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 at least one of the second access objects to send an SIB, or WUS configuration information for triggering SIB adaptation adjustment of at least one of the second access objects; WUS configuration information for triggering random access channel RACH monitoring of at least one of the second access objects, or WUS configuration information for triggering RACH monitoring 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; Configuration information related to the SIB currently being sent by the at least one second access object; Configuration information related to the RACH listening behavior in which the at least one second access object is currently located; Configuration information related to the SSB sent after successful triggering by WUS; Configuration information related to the SIB sent after successful triggering by WUS; Configuration information related to RACH listening after successful triggering by WUS; Characteristic information of the at least one second access object itself.

13. The method according to claim 12, wherein, The target access object belongs to the second access object group, the first information includes WUS configuration information for triggering the at least one second access object to send an SSB / SIB, or WUS configuration information for triggering an adaptive adjustment of the SSB / SIB of the at least one second access object, and the first information includes WUS configuration information for triggering the at least one second access object to listen to the random access channel RACH, or WUS configuration information for triggering an adaptive adjustment of the RACH listening of the at least one second access object. The method further includes: The target access object receives a wake-up signal WUS, where the WUS is sent by the terminal when a first condition is met, and the WUS is used to trigger the target access object to perform at least one of sending an SSB, sending an SIB, and listening to the RACH. 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 to the RACH, sending an energy-saving SSB, sending an energy-saving SIB, and energy-saving listening to the RACH. 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.

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

15. A random access device, wherein, The apparatus 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; An access object selection module, configured to select a target access object that performs 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.

16. The device according to claim 15, wherein, The first information corresponds to at least one second access object in the second access object group, and the first information includes at least one of the following: The wake-up signal WUS configuration information for triggering the at least one second access object to send an 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; The WUS configuration information for triggering the at least one second access object to send an SIB, or the WUS configuration information for triggering the SIB adaptation adjustment of the at least one second access object; The WUS configuration information for triggering the random access channel RACH listening of the at least one second access object, or the WUS configuration information for triggering the RACH listening adaptation adjustment of the at least one second access object; The relevant configuration information of the SSB currently being sent by the at least one second access object; The relevant configuration information of the SIB currently being sent by the at least one second access object; The relevant configuration information of the RACH listening behavior currently being performed by the at least one second access object; The relevant configuration information of the SSB sent after the WUS trigger is successful; The relevant configuration information of the SIB sent after the WUS trigger is successful; The relevant configuration information of the RACH listening after the WUS trigger is successful; The characteristic information of the at least one second access object itself.

17. The device according to claim 15, wherein, The first rule is related to at least one of the following: One or more access objects that the network side device indicates or configures for the terminal to 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 normally sends an SIB; Whether the second access object satisfies at least two of performing normal RACH listening, normally sending an SSB, and normally sending an SIB; The number of times of WUS that needs to be sent to the second access object; The priority of the second access object; The signal strength measurement value of the reference signal of the second access object, where the signal strength includes at least one of the reference signal received power RSRP and the 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.

18. 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 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.

19. The device according to claim 18, characterized in that, The first information corresponds to at least one second access object in the second access object group, and the first information includes at least one of the following: Wake-up signal (WUS) configuration information for triggering the at least one second access object to send a synchronization signal block (SSB), or WUS configuration information for triggering adaptive adjustment of the SSB 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; WUS configuration information for triggering the at least one second access object to send a system information block (SIB), or WUS configuration information for triggering adaptive adjustment of the SIB of the at least one second access object; WUS configuration information for triggering the at least one second access object to listen on a random access channel (RACH), or WUS configuration information for triggering adaptive adjustment of the RACH listening of the at least one second access object; Relevant configuration information of the SSB currently being sent by the at least one second access object; Relevant configuration information of the SIB currently being sent by the at least one second access object; Relevant configuration information of the RACH listening behavior currently in which the at least one second access object is located; Relevant configuration information of the SSB sent after being successfully triggered by WUS; Relevant configuration information of the SIB sent after being successfully triggered by WUS; Relevant configuration information of the RACH listening after being successfully triggered by WUS; Characteristic information of the at least one second access object itself.

20. A terminal, characterized in that, Comprising 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, the steps of the random access method according to any one of claims 1 to 10 are implemented.

21. A network-side device, characterized in that, Comprising 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, the steps of the communication method according to any one of claims 11 to 14 are implemented.

22. A readable storage medium, characterized in that, A program or instruction is stored on the readable storage medium, and when the program or instruction is executed by a processor, the steps of the random access method according to any one of claims 1 to 10 are implemented, or the steps of the communication method according to any one of claims 11 to 14 are implemented.

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