Downlink information receiving method, downlink information sending method, and terminal and network-side device

Abstract

The present application belongs to the technical field of communications. Disclosed are a downlink information receiving method, a downlink information sending method, and a terminal and a network-side device. The downlink information receiving method comprises: a terminal sending a target uplink transmission, which is used for requesting the sending of first downlink information; and the terminal receiving the first downlink information, wherein a possible sending position for the first downlink information is determined by means of at least one of the following: being pre-defined in a protocol, being indicated by a network-side device, being indicated in feedback information for the target uplink transmission, or being indicated in second downlink information, which second downlink information is sent periodically, and the first downlink information or the second downlink information comprises at least one of the following, or, the first downlink information or the second downlink information comprises a control channel / search space for scheduling at least one of the following: SSB, PSS, SSS, PBCH, DMRS, TRS, CSI-RS, positioning signal, at least some SIBs, and at least some OSI.

Description

Methods for receiving or sending downlink information, terminals and network-side equipment

[0001] Cross-references to related applications

[0002] This application claims priority to Chinese Patent Application No. 202510351649.6, filed on March 24, 2025, entitled “Method for Receiving or Transmitting Downlink Information, Terminal and Network Side Device”, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application belongs to the field of communication technology, specifically relating to a method for receiving or sending downlink information, a terminal, and network-side equipment. Background Technology

[0004] Some related technologies involve always-on downlink information, such as periodically transmitted downlink information, including synchronization signals and physical broadcast channel blocks (SSBs). The periodic transmission of downlink information is energy-intensive for network-side equipment. Increasing the period of this downlink information can reduce the energy consumption of network-side equipment to some extent, but it increases the search complexity of the terminal, which is also energy-intensive for the terminal. Summary of the Invention

[0005] This application provides a method, terminal, and network-side device for receiving or sending downlink information, which can solve the problem of how to send or receive downlink information in order to reduce the energy consumption of communication equipment.

[0006] In a first aspect, a method for receiving downlink information is provided, comprising: a terminal sending a target uplink transmission, the target uplink transmission being used to request the transmission of first downlink information; the terminal receiving the first downlink information; wherein the possible transmission location of the first downlink information is determined by at least one of the following: protocol predefined, network-side device indication, feedback information indication of the target uplink transmission, or second downlink information indication, the second downlink information being transmitted periodically; the first downlink information or the second downlink information includes at least one of the following, or the first downlink information or the second downlink information includes a control channel / search space that schedules at least one of the following: SSB, PSS, SSS, PBCH, DMRS, TRS, CSI-RS, location signal, at least a portion of SIB, and at least a portion of OSI.

[0007] Secondly, a method for transmitting downlink information is provided, comprising: a network-side device receiving a target uplink transmission, the target uplink transmission being used to request the transmission of first downlink information; the network-side device transmitting the first downlink information; wherein the possible transmission location of the first downlink information is determined by at least one of the following: protocol predefined, indication by the network-side device, feedback information indication of the target uplink transmission, or indication of second downlink information, the second downlink information being transmitted periodically; the first downlink information or the second downlink information includes at least one of the following, or the first downlink information or the second downlink information includes a control channel / search space that schedules at least one of the following: SSB, PSS, SSS, PBCH, DMRS, TRS, CSI-RS, location signal, at least a portion of SIB, and at least a portion of OSI.

[0008] Thirdly, a downlink information receiving device is provided, applied to a terminal, comprising: a transmitting module for transmitting a target uplink transmission, the target uplink transmission being used to request the transmission of first downlink information; and a receiving module for receiving the first downlink information; wherein the possible transmission location of the first downlink information is determined by at least one of the following: protocol predefined, network-side device indication, feedback information indication of the target uplink transmission, or second downlink information indication, the second downlink information being transmitted periodically; the first downlink information or the second downlink information includes at least one of the following, or the first downlink information or the second downlink information includes a control channel / search space that schedules at least one of the following: SSB, PSS, SSS, PBCH, DMRS, TRS, CSI-RS, location signal, at least a portion of SIB, and at least a portion of OSI.

[0009] Fourthly, a downlink information transmission apparatus is provided, applied to a network-side device, comprising: a receiving module for receiving a target uplink transmission, the target uplink transmission being used to request the transmission of first downlink information; and a transmitting module for transmitting the first downlink information; wherein the possible transmission location of the first downlink information is determined by at least one of the following: protocol predefined, indication by the network-side device, feedback information indication of the target uplink transmission, or indication of second downlink information, the second downlink information being transmitted periodically; the first downlink information or the second downlink information includes at least one of the following, or the first downlink information or the second downlink information includes a control channel / search space that schedules at least one of the following: SSB, PSS, SSS, PBCH, DMRS, TRS, CSI-RS, location signal, at least a portion of SIB, and at least a portion of OSI.

[0010] Fifthly, a downlink information receiving or transmitting apparatus is provided, the apparatus being configured to perform the steps of the method described in the first aspect, or to implement the steps of the method described in the second aspect.

[0011] In a sixth aspect, a terminal is provided, the terminal including a processor and a memory, the memory storing a program or instructions executable on the processor, the program or instructions, when executed by the processor, implementing the steps of the method as described in the first aspect.

[0012] In a seventh aspect, a terminal is provided, including a processor and a communication interface, wherein the communication interface is used to send a target uplink transmission, the target uplink transmission being used to request the transmission of first downlink information; and to receive the first downlink information; wherein the possible transmission location of the first downlink information is determined by at least one of the following: protocol predefined, network-side device indication, feedback information indication of the target uplink transmission, or second downlink information indication, the second downlink information being transmitted periodically; the first downlink information or the second downlink information includes at least one of the following, or the first downlink information or the second downlink information includes a control channel / search space that schedules at least one of the following: SSB, PSS, SSS, PBCH, DMRS, TRS, CSI-RS, location signal, at least a portion of SIB, and at least a portion of OSI.

[0013] Eighthly, a network-side device is provided, the network-side device including a processor and a memory, the memory storing a program or instructions executable on the processor, the program or instructions, when executed by the processor, implementing the steps of the method as described in the second aspect.

[0014] A ninth aspect provides a network-side device, including a processor and a communication interface, wherein the communication interface is used to receive a target uplink transmission, the target uplink transmission being used to request the transmission of first downlink information; and to transmit the first downlink information; wherein the possible transmission location of the first downlink information is determined by at least one of the following: protocol predefined, indication by the network-side device, indication of feedback information from the target uplink transmission, or indication of second downlink information, the second downlink information being transmitted periodically; the first downlink information or the second downlink information includes at least one of the following, or the first downlink information or the second downlink information includes a control channel / search space that schedules at least one of the following: SSB, PSS, SSS, PBCH, DMRS, TRS, CSI-RS, location signal, at least a portion of SIB, and at least a portion of OSI.

[0015] In a tenth aspect, a readable storage medium is provided, on which a program or instructions are stored, which, when executed by a processor, implement the steps of the method described in the first aspect, or implement the steps of the method described in the second aspect.

[0016] Eleventhly, a wireless communication system is provided, comprising: a terminal and a network-side device, wherein the terminal can be used to perform the steps of the method as described in the first aspect, and the network-side device can be used to perform the steps of the method as described in the second aspect.

[0017] In a twelfth aspect, a chip is provided, the chip including a processor and a communication interface coupled to the processor, the processor being configured to run a program or instructions to implement the steps of the method described in the first aspect, or to implement the steps of the method described in the second aspect.

[0018] In a thirteenth aspect, a computer program / program product is provided, which is stored in a storage medium and is executed by at least one processor to implement the steps of the method as described in the first aspect, or to implement the steps of the method as described in the second aspect.

[0019] In this embodiment, the terminal can send a target uplink transmission, triggering the network-side device to send the first downlink information at a possible transmission location of the first downlink information, which helps to reduce the energy consumption of the terminal and the network-side device. Attached Figure Description

[0020] Figure 1 is a schematic diagram of a wireless communication system according to an embodiment of this application;

[0021] Figure 2 is a schematic flowchart of a downlink information receiving method according to an embodiment of this application;

[0022] Figure 3 is a schematic diagram illustrating a specific application of the downlink information receiving method according to an embodiment of this application;

[0023] Figure 4 is a schematic diagram illustrating a specific application of the downlink information receiving method according to an embodiment of this application;

[0024] Figure 5 is a schematic diagram of the structure of the first downlink information or the second downlink information according to an embodiment of this application;

[0025] Figure 6 is a schematic diagram of the structure of the first downlink information or the second downlink information according to an embodiment of this application;

[0026] Figure 7 is a schematic diagram of the structure of the first downlink information or the second downlink information according to an embodiment of this application;

[0027] Figure 8 is a schematic diagram of the structure of the first downlink information or the second downlink information according to an embodiment of this application;

[0028] Figure 9 is a schematic diagram illustrating a specific application of the downlink information receiving method according to an embodiment of this application;

[0029] Figure 10 is a schematic flowchart of a downlink information transmission method according to an embodiment of this application;

[0030] Figure 11 is a schematic diagram of the structure of a downlink information receiving device according to an embodiment of this application;

[0031] Figure 12 is a schematic diagram of the structure of a downlink information transmitting device according to an embodiment of this application;

[0032] Figure 13 is a schematic diagram of the structure of a communication device according to an embodiment of this application;

[0033] Figure 14 is a schematic diagram of the structure of a terminal according to an embodiment of this application;

[0034] Figure 15 is a schematic diagram of the structure of a network-side device according to an embodiment of this application. Detailed Implementation

[0035] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0036] The terms "first," "second," etc., used in this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such terms can be used interchangeably where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first" and "second" are generally of the same class, not limited in number; for example, the first object can be one or more. Furthermore, "or" in this application indicates at least one of the connected objects. For example, the scope of protection for "A or B" covers at least three scenarios: Scenario 1: including A but not B; Scenario 2: including B but not A; Scenario 3: including both A and B. In addition, the terms "A and / or B," "at least one of A and B," and "at least one of A or B" also cover at least the above three scenarios. The character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0037] The term "instruction" in this application can be either a direct instruction (or explicit instruction) or an indirect instruction (or implicit instruction). A direct instruction can be understood as the sender explicitly informing the receiver of specific information, the required operation, or the requested result in the instruction sent. An indirect instruction can be understood as the receiver determining the corresponding information based on the instruction sent by the sender, or making a judgment and determining the required operation or requested result based on the judgment result.

[0038] It is worth noting that the technologies described in this application are 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), or other systems. The terms "system" and "network" in this application are often used interchangeably, and the described technologies can be used in the systems and radio technologies mentioned above, as well as in other systems and radio technologies. The following description describes New Radio (NR) systems for illustrative purposes, and the term NR is used in most of the following description; however, these technologies can also be applied to systems other than NR systems, such as 6th Generation (6G) communication systems.

[0039] Figure 1 shows a block diagram of a wireless communication system applicable to an embodiment of this application. The wireless communication system includes a terminal 11 and a network-side device 12. The terminal 11 can also be referred to as User Equipment (UE), and can be a mobile phone, tablet computer, laptop computer, notebook computer, personal digital assistant (PDA), handheld computer, netbook, ultra-mobile personal computer (UMPC), mobile internet device (MID), augmented reality (AR), virtual reality (VR) device, robot, wearable device, flight vehicle, vehicle user equipment (VUE), shipboard equipment, pedestrian user equipment (PUE), smart home (home devices with wireless communication capabilities, such as refrigerators, televisions, washing machines, or furniture), game console, personal computer (PC), ATM, or self-service machine, etc. Wearable devices include: smartwatches, smart bracelets, smart headphones, smart glasses, smart jewelry (smart bracelets, smart chains, smart rings, smart necklaces, smart anklets, smart anklets, etc.), smart wristbands, smart clothing, etc. Among these, in-vehicle devices can also be referred to as in-vehicle terminals, in-vehicle controllers, in-vehicle modules, in-vehicle components, in-vehicle chips, or in-vehicle units, etc. It should be noted that the specific type of terminal 11 is not limited in this application embodiment. Network-side equipment 12 may include access network equipment or core network equipment, wherein access network equipment may also be referred to as Radio Access Network (RAN) equipment, radio access network function, or radio access network unit. Access network equipment may include base stations, Wireless Local Area Network (WLAN) access points (APs), or Wireless Fidelity (WiFi) nodes, etc.Among them, base stations can be referred to as Node B (NB), Evolved Node B (eNB), Next Generation Node B (gNB), New Radio Node B (NR Node B), Access Point, Relay Base Station (RBS), Serving Base Station (SBS), Base Transceiver Station (BTS), Radio Base Station, Radio Transceiver, Basic Service Set (BSS), Extended Service Set (ESS), Home Node B (HNB), Home Evolved Node B, Transmit / Receive Point (TRP), Non-Terrestrial Network (NTN) equipment (such as satellite or high altitude platform stations). The term "base station" can be any suitable term in the field, such as "station" or any other appropriate term in the relevant field, as long as the same technical effect is achieved. The term "base station" is not limited to specific technical terms. It should be noted that the embodiments of this application only use the base station in the NR system as an example for introduction, and do not limit the specific type of base station.

[0040] Core network equipment, also known as core network nodes, core network functions, or core network elements, includes, but is not limited to, at least one of the following: Mobility Management Entity (MME), Access and Mobility Management Function (AMF), Session Management Function (SMF), User Plane Function (UPF), Policy Control Function (PCF), Policy and Charging Rules Function (PCRF), Edge Application Server Discovery Function (EASDF), Unified Data Management (UDM), Unified Data Repository (UDR), Home Subscriber Server (HSS), Centralized network configuration (CNC), Network Repository Function (NRF), Network Exposure Function (NEF), Local NEF (L-NEF), and Binding Support. Functions include BSF, Application Function (AF), Location Management Function (LMF), Gateway Mobile Location Centre (GMLC), Network Data Analytics Function (NWDAF), and Non-Terrestrial Network (NTN) equipment (such as satellite or high altitude platform station).It should be noted that the embodiments of this application only use the core network equipment in the NR system as an example for introduction, and do not limit the specific type of core network equipment. If the name of the core network equipment mentioned in the embodiments of this application changes in subsequent protocol versions (e.g., 6G), it is also within the scope of protection of this application.

[0041] Optionally, the core network equipment can be implemented by one or more functional modules in a single device, or by multiple devices working together; this application does not specifically limit this. It is understood that the aforementioned functional modules can be network elements in hardware devices, software functional modules running on dedicated hardware, or virtualized functional modules instantiated on a platform (e.g., a cloud platform).

[0042] The method for receiving or sending downlink information provided in this application will be described in detail below with reference to the accompanying drawings and through some embodiments and application scenarios.

[0043] The terminal in the various embodiments of this application can be any kind of communication terminal or device, and is not limited to a mobile phone terminal.

[0044] In the various embodiments of this application, the SSB can be replaced with a synchronization signal or a synchronization signal / broadcast channel, or it can be called any channel that includes a synchronization signal, a broadcast signal, a physical broadcast channel (PBCH), a downlink broadcast channel carrying system messages, or its control channel.

[0045] The SIB1 in the various embodiments of this application carries at least part of the cell information, and may also be other terms or multiple SIB types.

[0046] The paging message in the various embodiments of this application can be at least one of paging control information (such as a control channel that schedules the paging data channel), paging information (such as a paging data channel), a data channel scheduled by the paging control information (such as a PDSCH channel additionally scheduled by the paging DCI), or an additional data channel scheduled by the paging data channel (such as a PDSCH channel further scheduled by the paging PDSCH). The paging message content can be the paging message itself or a short message.

[0047] As shown in Figure 2, this application embodiment provides a downlink information receiving method 200. This method can be executed by a terminal, in other words, the method can be executed by software or hardware installed on the terminal. The method includes the following steps.

[0048] S202: The terminal sends a target uplink transmission, which is used to request the transmission of the first downlink information.

[0049] The target uplink transmission is used to request the network-side device to send first downlink information. In some embodiments, the target uplink transmission may include at least one of the following:

[0050] 1) Physical Random Access Channel (PRACH).

[0051] 2) Low Power-Wake Up Signaling (LP-WUS).

[0052] 3) Wake-up Signaling (WUS).

[0053] 4) A signal specifically designed to trigger or request the first downlink information, such as a first downlink information with a specific sequence or a first downlink information with a specific waveform.

[0054] 5) Sounding Reference Signal (SRS).

[0055] 6) Scheduling Request (SR).

[0056] 7) Configure and schedule the Physical Uplink Shared Channel (CG PUSCH).

[0057] 8) Random access message 3 (Msg3) or random access message A (MsgA), such as Msg3 PUSCH, MsgA PUSCH.

[0058] This embodiment can flexibly use the above-mentioned different types of signals or channels as target uplink transmissions to request the transmission of the first downlink information; at the same time, this embodiment can use existing signals or channels to request the transmission of the first downlink information, avoiding major changes to the protocol and reducing development costs.

[0059] In some embodiments, after sending the target uplink transmission, the terminal can also receive feedback information of the target uplink transmission. The feedback information of the target uplink transmission includes at least one of the following: a WUS response, a paging message, or a Random Access Response (RAR). It is understood that this feedback information corresponds to the target uplink transmission. For example, if the target uplink transmission is LP-WUS or WUS, the feedback information can be a WUS response; if the target uplink transmission is PRACH, the feedback information can be a RAR; if the target uplink transmission is SRS, etc., the feedback information is a paging message, etc.

[0060] This embodiment, by receiving feedback information from the target uplink transmission, helps the terminal determine whether the network-side device has successfully received the target uplink transmission. If it is determined that the network-side device has successfully received the target uplink transmission, the terminal can receive the first downlink information at the possible transmission location of the first downlink information; or, if it is determined that the network-side device has not successfully received the target uplink transmission, the process can be terminated.

[0061] The feedback information of the target uplink transmission in this embodiment can also have other uses, such as indicating the possible transmission location of the first downlink information, indicating the resources or configuration of the first downlink information, etc.

[0062] S204: The terminal receives the first downlink information; wherein the possible transmission location of the first downlink information is determined by at least one of the following: protocol predefined, network-side device indication, feedback information indication of the target uplink transmission, or second downlink information indication, wherein the second downlink information is transmitted periodically.

[0063] In some embodiments, the terminal receives the first downlink information at a possible transmission location of the first downlink information; wherein, the reception of the first downlink information may also be the reception of a portion of the first downlink information; it is possible that the portion of the first downlink information that has already been received does not meet the requirements, thereby retransmitting the target uplink transmission, prompting the network-side device to send the remaining portion of the first downlink information.

[0064] In some embodiments, the first downlink information includes at least one of the following, or the first downlink information includes a control channel / search space that schedules at least one of the following: a synchronization signal and physical broadcast channel block (SSB), a primary synchronization signal (PSS), a secondary synchronization signal (SSS), a physical broadcast channel (PBCH), a demodulation reference signal (DMRS), a tracking reference signal (TRS), a channel state information-reference signal (CSI-RS), a positioning signal, at least a portion of system information blocks (SIBs), and at least a portion of other system information (OSI).

[0065] The type or content of the second downlink information may be different from or the same as that of the first downlink information. In some embodiments, the second downlink information includes at least one of the following, or the second downlink information includes a control channel / search space that schedules at least one of the following: SSB, PSS, SSS, PBCH, DMRS, TRS, CSI-RS, location signal, at least a portion of SIB, and at least a portion of OSI.

[0066] In some embodiments, the first downlink information can be understood as a Type 2 SSB, such as a demand-based SSB, i.e., an OD-SSB. At least a portion of the Type 2 SSB is a reference signal or channel that is transmitted on demand (e.g., requested on demand by the terminal), such as only sending PSS and SSS. The first downlink information is not sent by default to save energy. The second downlink information can be understood as a Type 1 SSB, wherein at least a portion of the Type 1 SSB is a reference signal or channel that is transmitted periodically.

[0067] This embodiment can divide the existing SSB into Type 1 SSB and Type 2 SSB. Type 1 SSB adopts a periodic transmission method similar to the existing technology; Type 2 SSB adopts an on-demand request triggering method, which not only ensures the information required by the terminal, but also helps to reduce the power consumption of the terminal and network side equipment.

[0068] In a specific embodiment, as shown in Figure 3, the first downlink information can be a Type 2 SSB, including PSS and SSS. The first downlink information can be referred to as a small SSB. The first downlink information is sent on demand, and the potential transmission location of the first downlink information is a periodic location, or the potential transmission location of the first downlink information is indicated by the second downlink information. The second downlink information can be a Type 1 SSB, including PSS, SSS, and PBCH. The second downlink information can be referred to as a large SSB, and the second downlink information is sent periodically.

[0069] In this embodiment, by periodically sending large SSBs and the terminal requesting small SSBs on demand, it is beneficial to reduce the energy consumption of the terminal and network-side equipment.

[0070] In another specific embodiment, the first downlink information can be a Type 2 SSB, including PSS, SSS, and PBCH. This first downlink information can be referred to as a large SSB. The first downlink information is sent on demand, and its potential transmission location is periodic, or the potential transmission location is indicated by the second downlink information. The second downlink information can be a Type 1 SSB, including PSS and SSS. This second downlink information can be referred to as a small SSB, and it is sent periodically.

[0071] In this embodiment, by periodically sending small SSBs and the terminal requesting large SSBs on demand, it is not only beneficial to reduce the energy consumption of the terminal and network-side equipment, but also to ensure that the terminal obtains the necessary information (such as large SSBs) for accessing the cell.

[0072] In this embodiment, the terminal can send a target uplink transmission, triggering the network-side device to send the first downlink information at a possible transmission location of the first downlink information, which helps to reduce the energy consumption of the terminal and the network-side device.

[0073] The downlink information receiving method provided in this application embodiment allows the terminal to request the transmission of first downlink information on demand through the target uplink transmission, which helps reduce the power consumption of the terminal and network-side equipment. Simultaneously, the possible transmission location of the first downlink information can be determined through protocol predefinition, network-side equipment indication, feedback information indication from the target uplink transmission, or indication of periodically transmitted second downlink information, which facilitates successful reception of the first downlink information by the terminal. This embodiment also defines first downlink information and second downlink information, which helps the terminal determine which first downlink information can be requested on demand and which second downlink information is periodically transmitted, thus improving the performance of the communication system.

[0074] The downlink information receiving method provided in this application embodiment can be applied in at least the following scenarios:

[0075] Scenario 1: In 6G and other scenarios, terminals in different Radio Resource Control (RRC) states can be associated with different types of SSBs. For example, idle terminals are associated with Type 1 SSBs (corresponding to the second downlink information in other embodiments, and the same applies thereafter), and connected terminals are associated with Type 2 SSBs (corresponding to the first downlink information in other embodiments, and the same applies thereafter). The periodic transmission of Type 1 SSBs ensures the quality of service for idle terminals, while Type 2 SSBs are requested and transmitted by connected terminals on demand to reduce the power consumption of terminals and network-side equipment.

[0076] This embodiment, while ensuring the performance of idle and connected terminals, triggers the transmission of Type 2SSB on demand, which is beneficial for energy saving of network-side equipment, for terminal access to energy-saving cells, and for terminals to trigger the first downlink information for measurement on demand.

[0077] Scenario 2: Connected-state terminals perform both periodic and event-based measurement reporting. When the network-side device determines that the connected-state terminal's measurement reporting results are poor, it activates additional PSS and SSS (Type 2SSB, corresponding to the first downlink information in other embodiments) to provide the terminal with more measurements. For the terminal, it can trigger Type 2SSB through target uplink transmission. After Type 2SSB is triggered, the network-side device can instruct the connected-state terminal to perform measurements at the corresponding location.

[0078] Scenario 3: The periodically transmitted Type 1SSB is a wide-beam transmission. The terminal triggers the transmission of Type 2SSB on demand. The triggered Type 2SSB is a narrow-beam transmission, which is beneficial for beam management.

[0079] Scenario 4: During Radio Link Monitor (RLM), after the number of Out Of Synchronization (OOS) errors reaches N310, the terminal triggers a Type 2 SSB through target uplink transmission. The power of the triggered Type 2 SSB is tentatively increased. The terminal performs RLM based on the Type 2 SSB, that is, it tries to ensure that N311 In Synchronization (IS) indications can be achieved during the T310 operation to avoid subsequent declarations of Radio Link Failure (RLF).

[0080] Scenario 5: During beam failure recovery (BFR), the SSB of the candidate beam is usually transmitted periodically. To save energy, the SSB of the candidate beam is not transmitted initially. When certain conditions are met, such as before beam failure, the terminal triggers the candidate beam through uplink transmission to the target beam, and then the SSB of the candidate beam starts to be transmitted, which is beneficial for energy saving.

[0081] In some embodiments, the terminal sending the target uplink transmission includes: the terminal sending the target uplink transmission when a first condition is met, wherein the first condition may include at least one of the following:

[0082] 1) The first downlink information was not received. This example can also be described as the network-side device not sending the first downlink information. This example is beneficial for the terminal to successfully receive the first downlink information.

[0083] 2) Beam failure (BF) occurs, which is beneficial for beam failure recovery.

[0084] 3) A radio link failure (RLF) occurs, which is beneficial for radio link recovery.

[0085] 4) The conditions for cell selection are met. This example is beneficial for the terminal to perform cell selection based on the first downlink information.

[0086] 5) The conditions for cell reselection are met. This example is beneficial for the terminal to perform cell reselection based on the first downlink information.

[0087] 6) Receive N consecutive Out Of Synchronization (OOS) indications, where N is an integer greater than 1.

[0088] For example, during the operation of the T310 timer, after receiving N310 consecutive OOS indications, a finer-grained first downlink message is triggered as a reference signal for the RLM to avoid subsequent RLF declarations.

[0089] 7) The T310 timer is running. The T310 timer is used for wireless link failure detection and wireless link recovery. This example is beneficial for triggering finer-grained first downlink information as a reference signal for the RLM to avoid subsequent RLF declarations.

[0090] 8) The following reselection or handover conditions are met: cell, TRP, carrier, band, subband, and reference signal group. This example is beneficial for the terminal to perform measurements based on the first downlink information.

[0091] 9) The measured value of the reference signal is not greater than the first threshold. The reference signal can be the second downlink information, etc. This example is beneficial for the terminal to perform measurements based on the first downlink information.

[0092] 10) There is a service to be transmitted, for example, a connected or inactive terminal has a service to be transmitted. This example is beneficial for the terminal to perform measurements based on the first downlink information.

[0093] 11) There is an urgent service to be transmitted or the service priority has reached a certain level. For example, a connected terminal or an inactive terminal has an urgent service to be transmitted; or the service priority of the service to be transmitted has reached a certain level. This example is beneficial for the terminal to make measurements based on the first downlink information.

[0094] 12) An uplink or downlink data packet arrives. For example, an uplink data packet arrives at the MAC layer. This example is beneficial for the terminal to perform measurements based on the first downlink information.

[0095] 13) The time interval between the last transmission of the target uplink is not less than the first duration, for example, the time interval between the last transmission of the target uplink (such as the transmission of WUS) is greater than A time units (such as symbols / time slots), so as to ensure that the terminal does not repeatedly transmit WUS multiple times in a short period of time and reduce terminal overhead.

[0096] 14) The second downlink information decoding fails, for example, PBCH decoding fails, SIB1 PDCCH decoding fails, SIB1 PDSCH decoding fails. This example is beneficial for the terminal to perform measurements based on the first downlink information.

[0097] 15) Multiple second downlink information decoding failures reach or exceed the first number, which is beneficial for the terminal to perform measurements based on the first downlink information.

[0098] 16) The number of failed attempts to access the target cell reaches or exceeds the second count. For example, the number of failed PRACH transmissions based on the second downlink information reaches the second count. This example is beneficial for the terminal to access the target cell based on the first downlink information.

[0099] 17) After using a specific transmission power (such as the maximum transmission power), the number of failed attempts to access the target cell reaches or exceeds the second number. For example, if the PRACH transmission power based on the second downlink information reaches a specific value, such as the maximum value, and access to the target cell still fails, the terminal sends the target uplink transmission to request the transmission of the first downlink information. This example is beneficial for the terminal to access the target cell based on the first downlink information.

[0100] 18) The timing advance (TA) for sending the target uplink transmission is effective.

[0101] 19) The number of transmissions of the target uplink transmission is no more than the third number, which can be configured or predefined.

[0102] 20) The target uplink transmission is a retransmission, and the time interval between the last transmission of the target uplink transmission and the last transmission is not less than the second duration.

[0103] 21) The first downlink information is allowed to be sent by the terminal upon request.

[0104] 22) The measured value of the first downlink information that has already been transmitted is not greater than the second threshold. This measured value may be the Reference Signal Receiving Power (RSRP), etc. In this example, the terminal can trigger other more suitable first downlink information through the target uplink transmission.

[0105] 23) The measured value of some of the transmitted first downlink information is less than the measured value of the second downlink information, and this measured value may be RSRP, etc. In this example, the terminal can trigger other more suitable first downlink information through the target uplink transmission.

[0106] 24) The measured value of some of the transmitted first downlink information is less than the measured value of the second downlink information, and the difference is not less than a third threshold. This measured value can be RSRP, etc. In this example, the terminal can trigger other more suitable first downlink information through the target uplink transmission.

[0107] In this embodiment, the terminal sends the target uplink transmission when the first condition is met, which is beneficial for the terminal to send the target uplink transmission at an appropriate time and improve the performance of the communication system.

[0108] This embodiment can be applied to different scenarios based on different first conditions.

[0109] In some embodiments, the terminal receiving the first downlink information includes: the terminal receiving the first downlink information based on resources or configuration of the first downlink information, wherein the resources or configuration of the first downlink information are used to indicate at least one of the following:

[0110] 1) Allow the type or feature of the terminal that is allowed to measure the first downlink information, for example, only allow terminals with reduced capability (RedCap UE) to measure the first downlink information.

[0111] 2) The reference signal identifier or reference signal group identifier corresponding to the first downlink information, such as SSB identifier (SSB index) or SSB group identifier (SSB group index).

[0112] 3) The content included in the first downlink information, such as the first downlink information only including PSS and SSS, or the first downlink information including PSS, SSS and simplified PBCH, which occupies 12 physical resource blocks (PRB).

[0113] 4) Repeated transmission of the first downlink information, for example, the number of times it is repeated.

[0114] 5) The transmission power of the first downlink information.

[0115] 6) The terminal radio resource control (RRC) state associated with the first downlink information, which may include RRC idle state, RRC inactive state, RRC connected state, network power saving state (NES state), non-network power saving state (non-NES state), etc.

[0116] 7) The transmission period of the first downlink information, which may be referred to as the period (Time period) thereafter, is related to the timing of SSB to RO or WUS, or the time window related to SSB to PRACH / WUS repetition.

[0117] 8) The number of cycles of the first downlink information transmission, that is, after the first downlink information is triggered, M cycles will be sent according to cycle T, or M cycles will be sent according to the cycle of the second downlink signal.

[0118] 9) The number of bursts in the first downlink information transmission, i.e., after the first downlink information is triggered, N bursts will be sent according to period T, or N bursts will be sent according to the period of the second downlink signal.

[0119] 10) Quasi-Co-Location (QCL) information of the first downlink information.

[0120] 11) QCL information, beams, reference signals, or channel resources associated with different parts of the first downlink information. For example, the first downlink information contains multiple parts, and different parts are associated with different PRACH resources. Based on the found PRACH, the network-side device determines that the transmission characteristics (e.g., beam) of subsequent downlink signals / channels can be the same as the transmission characteristics of the first downlink information part associated with the PRACH. This embodiment is beneficial to improving the reliability of the transmission of other downlink signals / channels.

[0121] 12) Different repeated transmissions of the first downlink information are associated with QCL information, beams, reference signals or channel resources respectively. For example, the first downlink information is transmitted multiple times, and different repeated transmissions are associated with different PRACH resources. Based on the found PRACH, the network-side device determines that the transmission characteristics (e.g., beam) of other subsequent downlink signals / channels can be the same as the transmission characteristics of the repeated transmissions of the first downlink information associated with the PRACH. This embodiment is beneficial to improving the reliability of other downlink signal / channel transmissions.

[0122] 13) Whether the first downlink information and the second downlink information belong to the same Band Width Part (BWP).

[0123] 14) The search step size of the Sync raster for the first downlink information.

[0124] 15) Whether the first downlink information is located on the synchronization grid.

[0125] 16) The transmission frequency of the first downlink information, such as the synchronization grid, or the frequency offset relative to the second downlink information, or the BWP where the first downlink information is located.

[0126] 17) Time and frequency resource configuration of the first downlink information.

[0127] 18) Common RNTI (Temporary Identifier for Public Radio Networks). This example helps the terminal determine, based on the Common RNTI, whether the first downlink information is already in a transmitting state, an active state, or has been triggered.

[0128] 19) Search space. This example helps the terminal determine, based on the search space, whether the first downlink information is already in a sending state, in an active state, or has been triggered.

[0129] 20) Whether the first downlink information is allowed to be requested by the terminal.

[0130] This embodiment, by providing resources or configurations for the first downlink information, helps the terminal determine the time domain location, frequency domain location, or frequency point of the first downlink information, which is beneficial for the terminal to successfully receive the first downlink information.

[0131] In some embodiments, the transmission frequency of the first downlink information mentioned above may be indicated by at least one of the following:

[0132] 1) Absolute Radio Frequency Channel Number (ARFCN).

[0133] 2) The offset relative to a specific frequency can be one or a set of PRB numbers, one or a set of subcarrier spacing numbers, or the offset of the GSCN value.

[0134] 3) The frequency offset of a specific frequency position (e.g., center frequency) of the first downlink information relative to a specific frequency position (e.g., center frequency) of the second downlink information.

[0135] 4) Global Synchronization Channel Number (GSCN).

[0136] This embodiment improves the terminal's ability to successfully receive the first downlink information by providing a transmission frequency for the first downlink information.

[0137] In some embodiments, the time-frequency resource configuration of the first downlink information includes at least one of the following:

[0138] 1) The time-domain offset of the first downlink information relative to the second downlink information may include offsets at the symbol level, slot level, millisecond level, or frame level.

[0139] 2) The frequency domain offset of the first downlink information relative to the second downlink information may include offsets at the PRB or Resource Element (RE) granularity.

[0140] 3) The transmission period of the first downlink information and the offset of the transmission position of the first downlink information relative to the start of the period within each period. This example uses the period plus the offset to determine the possible periodic locations of the first downlink information. This example is similar to SSB-based Measurement Timing configuration (SMTC), where the period varies from 1 to 160 subframes, and the corresponding offset value is less than or equal to the period value.

[0141] 4) The time domain offset of the first downlink information relative to the target uplink transmission.

[0142] 5) The first downlink information is offset in the time domain relative to the feedback information transmitted uplink to the target.

[0143] 6) The offset of the first downlink information relative to the start or end position of the target receiving window, wherein the target receiving window is the window through which the terminal receives feedback information transmitted from the target uplink. The start position may be a start time unit, and the end position may be an end time unit; wherein the start time unit and end time unit include milliseconds, frames, subframes, time slots, symbols, etc.

[0144] 7) The transmission period, transmission window, or transmission time length of the first downlink information, wherein the unit of the transmission period, transmission window, or transmission time length includes milliseconds, frames, subframes, time slots, symbols, number of periods, or number of SSB clusters (SSB bursts), etc.

[0145] This example can directly indicate the transmission period of the first downlink information without requiring a period offset.

[0146] The transmission period of the first downlink information is related to at least one of the following:

[0147] a. The association period from the first downlink information to a specific signal (such as PRACH or the target uplink transmission).

[0148] b. Determining the window for repeated transmissions of the target transmission (such as PRACH or target uplink transmission).

[0149] c. SSB (e.g., first downlink information or second downlink information) is mapped to the RO period or mode period.

[0150] d. The transmission period of the target uplink transmission.

[0151] This embodiment provides time and frequency resources for the first downlink information, which helps the terminal to successfully receive the first downlink information.

[0152] In some embodiments, before the terminal receives the first downlink information, the method further includes: the terminal determining the resources or configuration of the first downlink information based on at least one of the following:

[0153] 1) Indication or configuration of the SIB of the target cell. The SIB may include SIB1, SIBX, etc. The target cell may be the cell where the terminal sends the target uplink transmission, the cell that sends the first downlink information, or the cell that provides the configuration for sending the target uplink transmission.

[0154] 2) The indication of the second downlink information.

[0155] 3) Predefined information, such as a resource allocation table that predefines the resources of the first downlink information relative to the resources of the second downlink information. This resource allocation table may include corresponding time-domain resources, frequency-domain resources, sequence resources, spatial resources, signal formats, and may also include resource allocation information of the target uplink transmission resources that trigger the first downlink signal.

[0156] 4) Indication of the target uplink transmission.

[0157] 5) Indication of feedback information transmitted uplink to the target.

[0158] 6) Dedicated RRC signaling, downlink control information (DCI), media access control control element (MAC CE), RRC resume signaling, or RRC release signaling indication. For example, for a connected terminal, the network-side device can indicate the configuration of the first downlink information through dedicated RRC signaling.

[0159] 7) Paging message or paging DCI instruction.

[0160] 8) System Information Notification (SI) Instructions.

[0161] 9) System message update instructions.

[0162] 10) The frequency band, carrier, subband, BWP, frequency range, or synchronization grid in which the first downlink information is located.

[0163] 11) The frequency band, carrier, subband, BWP, frequency range, or synchronization grid in which the second downlink information is located.

[0164] This embodiment facilitates the terminal's flexible acquisition of resources or configurations for the first downlink information.

[0165] In some embodiments, the first downlink information includes at least one of the following features:

[0166] 1) It is a subset of SSBs in the entire candidate SSB beam set. For example, it can be indicated by a bitmap (such as an SSB index) that indicates at least one SSB in the candidate SSB beam set. The fields of the bitmap can be similar to ssb-PositionsInBurst in NR.

[0167] 2) Not on the sync rater.

[0168] 3) Located on a specific sync raster, which only allows specific terminals to perform measurements. This specificity can be, at most, the terminal type / feature corresponding to the terminal that the first downlink information is allowed to measure; or, the specific sync raster only allows terminals in a specific RRC state (e.g., RRC connected) to perform measurements. In this example, different sync rasteres and different terminal features have a mapping relationship, and the terminal can determine the sync raster where the first downlink information is located based on the supported terminal features.

[0169] 4) The period of the first downlink information is the same as the period of the second downlink information.

[0170] 5) The frequency of the first downlink information is the same as the frequency of the second downlink information or is located on the same synchronization grid. In other examples, the frequency of the first downlink information is different from the frequency of the second downlink information or is located on different synchronization grids.

[0171] 6) The time-domain resources of the first downlink information overlap or are time-division multiplexed with the time-domain resources of the second downlink information. In other examples, the time-domain resources of the first downlink information do not overlap with the time-domain resources of the second downlink information.

[0172] 7) The frequency domain resources of the first downlink information overlap or are frequency-division multiplexed with the frequency domain resources of the second downlink information. In other examples, the frequency domain resources of the first downlink information do not overlap with the frequency domain resources of the second downlink information.

[0173] 8) The specific information element (IE) in the Master Information Block (MIB) indicated by the first downlink information has a specific value. For example, when the specific information element Kssb = 30 (FR1) or 14 (FR2), it indicates that the SSB is a Type 2 SSB.

[0174] 9) The first downlink information is associated with the second downlink information. For example, the association relationship can be: one second downlink information is associated with the repeated transmission of one or more first downlink information; or the association relationship can be: one second downlink information is associated with one or more first downlink information.

[0175] 10) The first downlink information and the second downlink information belong to different reference signal identifier groups, different TRP groups, or different carrier groups. For example, the first downlink information and the second downlink information have different SSB identifiers.

[0176] 11) The first downlink information and the second downlink information have different structures.

[0177] 12) The first downlink information and the second downlink information share the time domain position or frequency domain position of the candidate.

[0178] This embodiment, by providing features of the first downlink information, facilitates the successful reception of the first downlink information by the terminal.

[0179] In some embodiments, after the terminal receives the first downlink information, the method further includes: the terminal determining, based on at least one of the following, that it is capable of performing random access or initiating a connection establishment request based on the first downlink information:

[0180] 1) The first downlink information is located at a specific frequency position or on a synchronization grid.

[0181] For example, if the first downlink information is located at a specific frequency position or on a synchronization grid, the idle terminal considers itself capable of making a random access / initiating a connection establishment request based on the first downlink information. In other embodiments, if the first downlink information is located at a specific frequency position or on a synchronization grid, the idle terminal considers itself unable to make a random access / initiating a connection establishment request based on the first downlink information.

[0182] 2) The level or type of the first downlink information.

[0183] For example, the first downlink information is an SSB, which implicitly or explicitly indicates its SSB level (e.g., stage 1 or stage 2) or SSB type (e.g., Type 1 or Type 2). If the first downlink information is stage 2 or of type Type 2, the terminal can determine that it can perform random access or initiate a connection establishment request based on the first downlink information.

[0184] 3) The indication of the first downlink information.

[0185] For example, the first downlink information implicitly or explicitly indicates whether the first downlink information can be used for random access or whether it can be used to initiate a connection establishment request.

[0186] 4) The first downlink information is associated with the Physical Random Access Channel (PRACH), mapped to the PRACH, associated with the RACH occasion (RO), or associated with the WUS occasion (wake up signal occasion).

[0187] For example, if the first downlink information implicitly or explicitly indicates that it is associated with PRACH, mapped to PRACH, associated with RACH timing, or associated with WUS timing, the terminal determines that it can perform random access or initiate a connection establishment request based on the first downlink information.

[0188] 5) The first downlink information is associated with an idle terminal.

[0189] For example, the first downlink information can implicitly or explicitly indicate whether it is associated with an idle terminal or a connected terminal. If the first downlink information is associated with an idle terminal, the terminal determines that it can perform random access or initiate a connection establishment request based on the first downlink information.

[0190] 6) The first downlink information applies to idle terminals.

[0191] For example, the first downlink information implicitly or explicitly indicates whether it is applicable to the idle terminal. If the first downlink information is applicable to the idle terminal, the terminal determines that it can perform random access or initiate a connection establishment request based on the first downlink information.

[0192] The aforementioned explicit indication may include: the first downlink information including a MIB, adding a bit to the MIB, or explicitly indicating using a spare bit in the MIB.

[0193] The aforementioned implicit indication may include: the first downlink information includes a MIB, the existing field in the MIB is redefined, and Kssb in the first downlink information is used as an indication. When Kssb = 30 (FR1) or 14 (FR2): for 6G idle state terminals, it is considered that random access cannot be performed based on the first downlink information. The idle state terminal further uses pdcch-ConfigSIB1 to find the frequency domain location (such as GSCN) of the SSB that can be accessed; for 6G connected state terminals, the SSB is understood to be a Type 2 SSB, and it is understood that the Type 2 SSB only transmits for one time window, or only transmits for a few quantities or periods, and measurement can only be performed based on the Type 2 SSB.

[0194] 7) The measured value of the first downlink information (e.g., RSRP, and so on) is not less than the fourth threshold.

[0195] 8) The measured value of the first downlink information is greater than the measured value of the second downlink information.

[0196] 9) The measured value of the first downlink information is greater than the measured value of the second downlink information and the difference is not less than the fifth threshold.

[0197] 10) The average of the measurements of multiple first downlink information is not less than the sixth threshold.

[0198] 11) The mean of the measurements of multiple first downlink information items within the target time period is greater than the mean of the measurements of multiple second downlink information items.

[0199] 12) Within the target time period, the mean of the measurements of multiple first downlink information is greater than the mean of the measurements of multiple second downlink information and the difference is not less than the seventh threshold.

[0200] The thresholds in various embodiments of this application, such as at least one of the first to seventh thresholds, may be predefined or configured or indicated by the network-side device.

[0201] In some embodiments, after the terminal receives the first downlink information, the method further includes: the terminal determining that the first downlink information is only used for measurement based on at least one of the following:

[0202] 1) The first downlink information is located at a specific frequency position or on a synchronization grid.

[0203] For example, if the first downlink information is located at a specific frequency position or on a synchronization grid, the idle terminal considers the first downlink information to be used only for measurement.

[0204] 2) The level or type of the first downlink information.

[0205] For example, the first downlink information is an SSB, which implicitly or explicitly indicates its SSB level (e.g., stage1 or stage2) or SSB type (e.g., Type1 or Type2). If the first downlink information is stage1 or of type Type1, the terminal can determine that the first downlink information is only used for measurement.

[0206] 3) The indication of the first downlink information.

[0207] For example, the first downlink information may implicitly or explicitly indicate whether the first downlink information is used only for measurement.

[0208] 4) The first downlink information is not associated with PRACH, is not mapped to PRACH, is not associated with RACH timing, or is not associated with WUS timing.

[0209] For example, if the first downlink information implicitly or explicitly indicates that it is not associated with PRACH, is not mapped to PRACH, is not associated with RACH timing, or is not associated with WUS timing, the terminal determines that the first downlink information is only used for measurement.

[0210] 5) The first downlink information is associated with the connected terminal.

[0211] For example, the first downlink information can implicitly or explicitly indicate whether it is associated with an idle terminal or a connected terminal. If the first downlink information is associated with a connected terminal, the terminal determines that the first downlink information is only used for measurement.

[0212] 6) The first downlink information is not applicable to idle terminals.

[0213] For example, the first downlink information implicitly or explicitly indicates whether it is applicable to the idle state terminal. If the first downlink information is not applicable to the connected state terminal, the terminal determines that the first downlink information is only used for measurement.

[0214] 7) The measured value of the first downlink information is not less than the fourth threshold.

[0215] 8) The measured value of the first downlink information is greater than the measured value of the second downlink information.

[0216] 9) The measured value of the first downlink information is greater than the measured value of the second downlink information and the difference is not less than the fifth threshold.

[0217] 10) The average of the measurements of multiple first downlink information is not less than the sixth threshold.

[0218] 11) The mean of the measurements of multiple first downlink information items within the target time period is greater than the mean of the measurements of multiple second downlink information items.

[0219] 12) Within the target time period, the mean of the measurements of multiple first downlink information is greater than the mean of the measurements of multiple second downlink information and the difference is not less than the seventh threshold.

[0220] In some embodiments, when the terminal determines that it cannot perform random access and initiate a connection establishment request based on the first downlink information, or determines that the first downlink information cannot be used for measurement, the method further includes: determining the resource location of a reference signal (such as an SSB) that allows random access based on the first downlink information, the feedback information of the target uplink transmission, or the resources or configuration of the first downlink information.

[0221] For example, the first downlink information includes a MIB. When the value of a specific field in the MIB, such as Kssb = 30 (FR1) or 14 (FR2), the 6G idle terminal believes that random access cannot be performed based on the first downlink information. The idle terminal further determines the frequency domain resource location of the SSB that allows random access, such as the GSCN, based on the specific field value in the MIB (such as pdcch-ConfigSIB1).

[0222] In some embodiments, if the first downlink information is already in the sending state, in the active state, or has been triggered due to the triggering of other terminals (such as UE1), the terminal (such as UE2) in this application embodiment may no longer send the target uplink transmission in order to reduce signaling overhead.

[0223] In some embodiments, the method further includes: the terminal determining, based on at least one of the following, that the first downlink information is in a sending state, in an active state, or has been triggered:

[0224] 1) A DCI scrambled with a specific RNTI (e.g., a specific common RNTI) is found in a specific search space (e.g., common SS), and the DCI is used to schedule the feedback information of the uplink transmission of the target.

[0225] The specific RNTI and specific search space mentioned above can be predefined by the protocol or included in the configuration of the first downlink information.

[0226] For example, if the first downlink information is an OD-SSB, and the terminal can find a DCI scrambled with a specific RNTI, the terminal assumes that the network-side device will send an OD-SSB at a possible transmission location in the next cycle. If the terminal does not find a DCI scrambled with a specific RNTI, the terminal assumes that the OD-SSB has not been sent and can send a target uplink transmission (such as WUS) request for an OD-SSB.

[0227] 2) The feedback information of the DCI scheduling with specific RNTI scrambling found (such as RAR or WUS response) contains the preamble identifier corresponding to the target uplink transmission.

[0228] For example, if the target uplink transmission is UL WUS and the feedback information is RAR, and if the RAR contains a preamble identifier corresponding to UL WUS (any preamble for UL WUS), then the terminal believes that the network-side device will send OD-SSB at a possible location in the next cycle's OD-SSB, where the first downlink information is OD-SSB.

[0229] If the terminal receives DCI via blind search and also receives RAR, then RAR can indicate that the first downlink information will be sent for X more cycles, where X is indicated by RAR.

[0230] 3) The first downlink information was blindly detected at a possible transmission location of the first downlink information.

[0231] For example, based on the configuration of the first downlink information, the terminal performs blind detection at the possible transmission location of the first downlink information, that is, the terminal directly performs blind detection of the first downlink information at the possible transmission location of the first downlink information before transmitting the target uplink transmission.

[0232] In this example, the duration of blind detection required by the terminal, or how many blind detection cycles the terminal needs to determine whether the OD-SSB is broadcasting or not, can be determined by protocol agreement or network-side device configuration.

[0233] 4) The network-side device indicates that the first downlink information is in the sending state, in the active state, or has been triggered.

[0234] The network-side device may indicate whether the first downlink information associated with the second downlink information is being transmitted; the end position of the transmission of the first downlink information associated with the second downlink information, such as the end of transmission after the Yth cycle following the second downlink information, or that the associated first downlink information will be transmitted for Z more cycles after the second downlink information.

[0235] The network-side device may indicate the information by: using newly added bits in the MIB of the second downlink information; or by using idle bits in the MIB of the second downlink information.

[0236] In one example, RRC signaling, MAC CE, DCI, and paging messages indicate that the current first downlink information is being sent and how long it has been sent.

[0237] In this embodiment, the terminal determines that the first downlink information is in a sending state, in an active state, or has been triggered, which can reduce unnecessary uplink transmissions and reduce communication overhead.

[0238] In some embodiments, after the terminal sends the target uplink transmission, the method further includes: the terminal receiving feedback information of the target uplink transmission, wherein the feedback information of the target uplink transmission is used to indicate at least one of the following:

[0239] 1) The preamble identifier corresponding to the target uplink transmission.

[0240] 2) The reference signal (SSB) beam identifier or beam group identifier corresponding to the first downlink information.

[0241] 3) The transmission period of the first downlink information.

[0242] 4) The number of cycles of the first downlink information transmission, that is, after the first downlink information is triggered, M cycles will be sent according to cycle T, or M cycles will be sent according to the cycle of the second downlink signal.

[0243] 5) The number of clusters in the first downlink information transmission, i.e., after the first downlink information is triggered, N bursts will be sent according to period T, or N bursts will be sent according to the period of the second downlink signal.

[0244] 6) Duration of the target receiving window, wherein the target receiving window is the window through which the terminal receives feedback information transmitted uplink from the target.

[0245] This embodiment, by receiving feedback information from the target uplink transmission, helps the terminal determine whether the network-side device has successfully received the target uplink transmission. If it is determined that the network-side device has successfully received the target uplink transmission, the terminal can receive the first downlink information at the possible transmission location of the first downlink information; or, if it is determined that the network-side device has not successfully received the target uplink transmission, the process can be terminated.

[0246] The feedback information of the target uplink transmission in this embodiment can also have other uses, such as indicating the possible transmission location of the first downlink information, indicating the resources or configuration of the first downlink information, etc.

[0247] In some embodiments, the method further includes: when the first downlink information and the second downlink information overlap, the terminal performs one of the following:

[0248] 1) Only the first downlink information is received.

[0249] 2) Only the second downlink information is received.

[0250] 3) Only the earlier of the first downlink information and the second downlink information in the time domain is received.

[0251] 4) Only receive the one containing the PBCH load between the first downlink information and the second downlink information.

[0252] In this embodiment, the first downlink information and the second downlink information overlap, which can be in the time domain, in the frequency domain, or in both the time domain and the frequency domain.

[0253] In this embodiment, the terminal can determine the corresponding receiving behavior based on the priority of the first downlink information and the second downlink information.

[0254] To illustrate in detail the method for receiving or sending downlink information provided in the embodiments of this application, the following will describe it in conjunction with several specific embodiments.

[0255] Example Group 1

[0256] In this embodiment, the first downlink information is Type 2SSB (OD-SSB). The possible transmission location of Type 2SSB is periodic, but whether to send Type 2SSB at the possible transmission location depends on whether the terminal sends the target uplink transmission, which is UL-WUS, or WUS for short, as shown in Figure 3.

[0257] In this embodiment, the OD-SSB (Type 2SSB) can be a one-shot SSB that performs measurements in the connected state (UE). This embodiment can predefine some possible transmission locations, and after the terminal sends WUS, it receives the OD-SSB at the possible transmission location. These Type 2SSBs may only contain PSS and SSS, without carrying PBCH, or only carry a small portion of PBCH.

[0258] In this embodiment, the second downlink information is Type 1SSB, as shown in Figure 3. Type 1SSB is sent periodically.

[0259] This embodiment includes the following steps:

[0260] Step 1: Connected terminals can obtain WUS configuration based on RRC signaling, SIB, DCI or MAC CE.

[0261] This embodiment can either directly configure specific WUS configuration parameters to the terminal, or configure multiple WUS configurations via RRC, with DCI or MAC CE dynamically indicating one of them.

[0262] Step 2: When the connected terminal meets the first condition, it sends WUS. The first condition can be found in the description of other embodiments and will not be repeated here.

[0263] Step 3: The terminal receives Type 2SSB. The terminal assumes that Type 2SSB will send N bursts according to period T. Wherein, N and T can be predefined by the protocol, or indicated to the terminal by RRC signaling, DCI, MAC CE, or by Type 1SSB.

[0264] In this embodiment, the configuration of OD-SSB (Type 2SSB) (explicit, preconfigured, or specified) can be found in the description of the resources or configuration of the first downlink information in other embodiments.

[0265] The configuration of OD-SSB (Type 2SSB) can be indicated or configured by SIB1 / SIBX, or by Type 1SSB, or predefined by the protocol.

[0266] The characteristics of OD-SSB (Type 2SSB) can be found in the description of the characteristics of the first downlink information in other embodiments.

[0267] Step 4: Based on the received Type 2SSB, the terminal further determines whether to declare BF, declare RLF, perform cell reselection, or retransmit WUS.

[0268] The following describes the effects of OD-SSB dynamic activation / deactivation.

[0269] If the Type 2SSB (OD-SSB) is on the synchronization grid, the impact on idle terminals can be reduced by at least one of the following methods.

[0270] 1) OD-SSB specifies that only connected terminals are allowed to perform measurements on a specific synchronization grid, and idle terminals are not allowed to access it.

[0271] 2) The MIB of the PBCH of the OD-SSB indicates whether or how to search for a type 1 SSB (corresponding to the second downlink information in other embodiments), or indicates the level or type of the current SSB, or indicates whether it is associated with RO / WUS resources.

[0272] If the MIB indication is Type 2SSB, then idle-state terminals are not allowed to access based on Type 2SSB by default.

[0273] If the MIB indication is not associated with the RO, then the idle-state terminal defaults to the absence of a mapping between the OD-SSB and the RO, and access based on Type 2SSB is not allowed.

[0274] 3) A specific value in a field of the PBCH MIB indicates that the OD-SSB is not applicable to idle terminals / not associated with PRACH.

[0275] For example, a specific field of '0' indicates that an idle terminal can continue searching for Type 1 SSB access on the synchronization grid, while a specific field of '1' indicates that an idle terminal does not need to continue searching for SSBs on the synchronization grid.

[0276] For Type 2 SSB, Kssb = 30(FR1) / 14(FR2). For traditional terminals, this is directly removed. For idle terminals such as 6G, the frequency domain location (GSCN) that can be accessed by the idle terminal is further indicated based on pdcch-ConfigSIB1. For connected terminals such as 6G, this SSB is understood as Type 2 SSB, meaning that this Type 2 SSB only transmits for one time window or only transmits a few quantities / cycles, allowing measurements to be performed based on this Type 2 SSB.

[0277] Impact on rate matching of connected terminals: RRC configures the RB-level rate matching pattern of Type 2SSB. After the terminal receives the RAR from WUS and confirms the successful activation of Type 2SSB, the terminal performs PDSCH rate matching based on the RM configuration of Type 2SSB.

[0278] If OD-SSB is triggered by UE1, in order to prevent other UEs from repeatedly sending WUS, UE2 (connected-state terminal) determines the broadcast status of Type 2SSB based on the following method:

[0279] 1) UE2 blind search, blindly search for DCI scrambled with common RNTI. If UE2 can find DCI scrambled with common RNTI, then UE2 believes that OD-SSB will be sent at the possible transmission position in the next cycle.

[0280] 2) Blindly search the RAR of DCI scheduling with common RNTI scrambling. If the RAR contains any preamble of WUS, then UE2 believes that OD-SSB will be sent at the possible transmission position in the next cycle.

[0281] 3) If the possible transmission locations of the OD-SSB are periodic, UE2 will blindly search for SS at the possible transmission locations of the OD-SSB before sending WUS. How long / how many cycles of blind search can determine whether the Type 2 SSB is broadcasting or not requires protocol agreement / network-side configuration indication.

[0282] 4) The network-side device indicates whether Type 2SSB is being transmitted at the possible transmission location X cycles after the Type 1SSB indication.

[0283] The network-side device can indicate this by: using newly added bits in the MIB of the Type 1SSB; or by using idle bits in the MIB of the Type 1SSB.

[0284] If the OD-SSB is used for a connected terminal, RRC signaling, MAC CE / DCI, and paging messages can be used to indicate that the OD-SSB is currently transmitting and how long it has been transmitting can be described in absolute time.

[0285] The WUS RAR indicates whether the Type 2SSB is being transmitted in the next X cycles, X of which is indicated by the RAR.

[0286] Example 2

[0287] In this embodiment, the first downlink information is Type 2 SSB (OD-SSB), and the second downlink information is Type 1 SSB (always-on SSB, AO-SSB). The time domain position of Type 1 SSB is the same as the time domain position (configuration) that Type 2 SSB may send. Essentially, when the time domain positions of OD-SSB and AO-SSB overlap, OD-SSB covers AO-SSB.

[0288] In this embodiment, the network-side equipment periodically sends AO-SSBs, such as PSS and SSS, to ensure that idle-state terminals can synchronize. When an idle-state terminal needs to access a cell, the terminal triggers a complete SSB (Type 2 SSB) as needed to obtain the necessary information for cell access. In this embodiment, the periods of Type 2 SSB and Type 1 SSB are consistent, that is, the potential transmission locations are consistent. WUS determines whether a Type 1 SSB or a Type 2 SSB appears at the potential transmission location.

[0289] Taking Figure 4 as an example, both Type 1 SSB and Type 2 SSB have a period of 20ms. The network-side device sends a Type 1 SSB (PSS+SSS) every 20ms, which achieves energy saving compared to sending a complete SSB (PSS+SSS+PBCH) every 20ms in the NR system. When the terminal meets the first condition for sending WUS, the terminal sends WUS. Then, for the N bursts (N*20ms) after WUS, the reference signal at the possible transmission positions is Type 2 SSB. After N bursts, the reference signal at the possible transmission positions reverts to Type 1 SSB to save energy.

[0290] This embodiment includes the following steps:

[0291] Step 1: The protocol predefines the WUS configuration, including the WUS uplink frequency, transmit power, preamble sequence, time and frequency resources, etc.

[0292] Step 2: After the idle terminal measures PSS+SSS (Type 1 SSB), if it chooses to access the cell, it sends WUS based on the predefined WUS configuration to request the network side to send the complete SSB (Type 2 SSB).

[0293] Step 3: The terminal receives the complete SSB (Type 2 SSB), receiving N bursts. N can be pre-defined by the protocol, such as 4 or 8, or N can be indicated by the Type 1 SSB. The terminal reads the MIB, receives SIB1, and determines whether the cell selection criteria are met. The terminal assumes that after N bursts following the WUS, the reference signals at possible transmission locations have all recovered to the original Type 1 SSB. If further measurement is required, the WUS needs to be retransmitted.

[0294] Step 4: If the cell residency criteria are met, the terminal will reside in that cell.

[0295] In some embodiments, the period of the triggered OD-SSB (Type 1SSB) is consistent with the period of the periodically transmitted Type 2SSB, that is, the periods of Type 1SSB and Type 2SSB are the same, and the possible transmission positions in the time domain are the same. When WUS is triggered, OD-SSB (Type 1SSB) will send N bursts. After N bursts, the SSB at the possible transmission positions will revert to Type 2SSB.

[0296] WUS configuration can also be implicitly indicated by PSS, SSS, or PSS+SSS of Type 2SSB.

[0297] In this embodiment, only the PSS and SSS are periodically transmitted, which saves power for the network side. If an idle state wants to access the cell, it must first wake up the entire SSB to transmit in order to obtain complete access information for the cell, which may result in some delay.

[0298] Example 3

[0299] This embodiment primarily illustrates possible examples of Type 1 SSB and Type 2 SSB:

[0300] Example 1, as shown in Figure 5, Type 1 SSB or Type 2 SSB occupies 4 symbols in the time domain and 20 RBs in the frequency domain.

[0301] Example 2, as shown in Figure 6, Type 1 SSB or Type 2 SSB occupies 2 symbols in the time domain and 127 subcarriers in the frequency domain, including PSS+SSS.

[0302] Example 3, as shown in Figure 7, Type 1 SSB or Type 2 SSB occupies X symbols in the time domain and 127 subcarriers in the frequency domain, including PSS+SSS+PBCH.

[0303] Example 4, as shown in Figure 8, Type 1 SSB or Type 2 SSB occupies X symbols in the time domain and 12 PRBs in the frequency domain, including PSS+SSS+PBCH.

[0304] It is understood that the above are just examples, and the number of symbols occupied by Type 1 SSB and Type 2 SSB in the time domain or in the frequency domain is not limited accordingly.

[0305] Example 4

[0306] In this embodiment, OD-SSB and AO-SSB are not located at the same frequency.

[0307] In this embodiment, as shown in Figure 9, there is an opportunity for WUS to be sent when the Type 1 SSB is periodically sent at offsets of several symbols or slots. When the terminal meets the first condition for sending WUS, it sends WUS in sync raster1 to request the transmission of Type 2 SSB (OD-SSB).

[0308] This embodiment includes the following steps:

[0309] Step 1: The protocol predefines the WUS configuration, including the WUS uplink frequency, transmit power, preamble sequence, time and frequency resources, etc.; or the Type 1SSB indicates the WUS transmission information.

[0310] Step 2: After the idle terminal measures PSS+SSS (Type 1SSB), if it chooses to access the cell, it sends WUS based on the predefined WUS configuration to request the network side to send the complete SSB (Type 2SSB). The Type 2SSB can be on the same frequency point 1 or synchronization grid 1 as the Type 1SSB, or it can be on another frequency point 2 or synchronization grid 2. The frequency point 2 or synchronization grid 2 can be predefined by the protocol or indicated by the Type 1SSB.

[0311] Step 3: The terminal receives the complete SSB (Type 2 SSB) at frequency point 2 or synchronization grid 2, and receives N bursts. N can be agreed upon in advance by the protocol, such as 4 or 8. N can also be indicated by Type 1 SSB. The terminal reads the MIB, receives SIB1, and determines whether the cell selection criteria are met.

[0312] Step 4: If the cell camping criteria are met, the terminal camps in that cell and returns to frequency point 1 or synchronization grid 1 to receive paging messages.

[0313] In some embodiments, the frequency difference between frequency point 1 or synchronization grid 1 and frequency point 2 or synchronization grid 2 is less than a certain value to reduce the time of UE RF retuning.

[0314] In some embodiments, Type 2SSB and Type 1SSB are on the same synchronization grid.

[0315] In some embodiments, if Type 2SSB and Type 1SSB are on different synchronization grids, after the terminal sends WUS, it first goes to synchronization grid 2 to receive Type 2SSB, receives SIB1, obtains the necessary cell access information, and then readjusts back to synchronization grid 1 to camp.

[0316] The method for receiving downlink information according to an embodiment of this application has been described in detail above with reference to Figures 2 to 9. The method for transmitting downlink information according to another embodiment of this application will now be described in detail with reference to Figure 10. It is understood that the interaction between the network-side device and the terminal described from the perspective of the network-side device is the same as or corresponds to the terminal-side description in the method shown in Figure 2; to avoid repetition, relevant descriptions are appropriately omitted.

[0317] Figure 10 is a schematic flowchart illustrating the downlink information transmission method according to an embodiment of this application, which can be applied to network-side devices. As shown in Figure 10, the method 1000 includes the following steps.

[0318] S1002: The network-side device receives the target uplink transmission, which is used to request the transmission of the first downlink information.

[0319] S1004: The network-side device sends the first downlink information; wherein the possible transmission location of the first downlink information is determined by at least one of the following: protocol predefined, indication by the network-side device, indication of feedback information of the target uplink transmission, or indication of second downlink information, wherein the second downlink information is sent periodically.

[0320] The first downlink information or the second downlink information includes at least one of the following, or the first downlink information or the second downlink information includes a control channel / search space that schedules at least one of the following: SSB, PSS, SSS, PBCH, DMRS, TRS, CSI-RS, location signal, at least a portion of SIB and at least a portion of OSI.

[0321] In this embodiment, the terminal can request the transmission of first downlink information on demand through the target uplink transmission, which helps reduce the power consumption of the terminal and network-side equipment. At the same time, the possible transmission location of the first downlink information can be determined by means of protocol predefinition, network-side equipment indication, feedback information indication from the target uplink transmission, or indication of periodically transmitted second downlink information, which helps the terminal to successfully receive the first downlink information. This embodiment also defines the first downlink information and the second downlink information, which helps the terminal determine which first downlink information can be requested on demand and which second downlink information is transmitted periodically, thereby improving the performance of the communication system.

[0322] In some embodiments, the method further includes: the network-side device indicating to the terminal the resources or configuration of the first downlink information, wherein the resources or configuration of the first downlink information are used to indicate at least one of the following:

[0323] 1) Allow the type or feature of the terminal that is allowed to measure the first downlink information, for example, only allow terminals with reduced capability (RedCap UE) to measure the first downlink information.

[0324] 2) The reference signal identifier or reference signal group identifier corresponding to the first downlink information, such as SSB identifier (SSB index) or SSB group identifier (SSB group index).

[0325] 3) The content included in the first downlink information, such as the first downlink information only including PSS and SSS, or the first downlink information including PSS, SSS and simplified PBCH, which occupies 12 physical resource blocks (PRB).

[0326] 4) Repeated transmission of the first downlink information, for example, the number of times it is repeated.

[0327] 5) The transmission power of the first downlink information.

[0328] 6) The terminal radio resource control (RRC) state associated with the first downlink information, which may include RRC idle state, RRC inactive state, RRC connected state, network power saving state (NES state), non-network power saving state (non-NES state), etc.

[0329] 7) The transmission period of the first downlink information, which may be referred to as the period (Time period) thereafter, is related to the timing of SSB to RO or WUS, or the time window related to SSB to PRACH / WUS repetition.

[0330] 8) The number of cycles of the first downlink information transmission, that is, after the first downlink information is triggered, M cycles will be sent according to cycle T, or M cycles will be sent according to the cycle of the second downlink signal.

[0331] 9) The number of bursts in the first downlink information transmission, i.e., after the first downlink information is triggered, N bursts will be sent according to period T, or N bursts will be sent according to the period of the second downlink signal.

[0332] 10) Quasi-Co-Location (QCL) information of the first downlink information.

[0333] 11) QCL information, beams, reference signals, or channel resources associated with different parts of the first downlink information. For example, the first downlink information contains multiple parts, and different parts are associated with different PRACH resources. Based on the found PRACH, the network-side device determines that the transmission characteristics (e.g., beam) of subsequent downlink signals / channels can be the same as the transmission characteristics of the first downlink information part associated with the PRACH. This embodiment is beneficial to improving the reliability of the transmission of other downlink signals / channels.

[0334] 12) Different repeated transmissions of the first downlink information are associated with QCL information, beams, reference signals or channel resources respectively. For example, the first downlink information is transmitted multiple times, and different repeated transmissions are associated with different PRACH resources. Based on the found PRACH, the network-side device determines that the transmission characteristics (e.g., beam) of other subsequent downlink signals / channels can be the same as the transmission characteristics of the repeated transmissions of the first downlink information associated with the PRACH. This embodiment is beneficial to improving the reliability of other downlink signal / channel transmissions.

[0335] 13) Whether the first downlink information and the second downlink information belong to the same Band Width Part (BWP).

[0336] 14) The search step size of the Sync raster for the first downlink information.

[0337] 15) Whether the first downlink information is located on the synchronization grid.

[0338] 16) The transmission frequency of the first downlink information, such as the synchronization grid, or the frequency offset relative to the second downlink information, or the BWP where the first downlink information is located.

[0339] 17) Time and frequency resource configuration of the first downlink information.

[0340] 18) Common RNTI (Temporary Identifier for Public Radio Networks). This example helps the terminal determine, based on the Common RNTI, whether the first downlink information is already in a transmitting state, an active state, or has been triggered.

[0341] 19) Search space. This example helps the terminal determine, based on the search space, whether the first downlink information is already in a sending state, in an active state, or has been triggered.

[0342] 20) Whether the first downlink information is allowed to be requested by the terminal.

[0343] This embodiment, by providing resources or configurations for the first downlink information, helps the terminal determine the time domain location, frequency domain location, or frequency point of the first downlink information, which is beneficial for the terminal to successfully receive the first downlink information.

[0344] In some embodiments, the first downlink information includes at least one of the following features:

[0345] 1) It is a subset of SSBs in the entire candidate SSB beam set. For example, it can be indicated by a bitmap (such as an SSB index) that indicates at least one SSB in the candidate SSB beam set. The fields of the bitmap can be similar to ssb-PositionsInBurst in NR.

[0346] 2) Not on the sync rater.

[0347] 3) Located on a specific sync raster, which only allows specific terminals to perform measurements. This specificity can be, at most, the terminal type / feature corresponding to the terminal that the first downlink information is allowed to measure; or, the specific sync raster only allows terminals in a specific RRC state (e.g., RRC connected) to perform measurements. In this example, different sync rasteres and different terminal features have a mapping relationship, and the terminal can determine the sync raster where the first downlink information is located based on the supported terminal features.

[0348] 4) The period of the first downlink information is the same as the period of the second downlink information.

[0349] 5) The frequency of the first downlink information is the same as the frequency of the second downlink information or is located on the same synchronization grid. In other examples, the frequency of the first downlink information is different from the frequency of the second downlink information or is located on different synchronization grids.

[0350] 6) The time-domain resources of the first downlink information overlap or are time-division multiplexed with the time-domain resources of the second downlink information. In other examples, the time-domain resources of the first downlink information do not overlap with the time-domain resources of the second downlink information.

[0351] 7) The frequency domain resources of the first downlink information overlap or are frequency-division multiplexed with the frequency domain resources of the second downlink information. In other examples, the frequency domain resources of the first downlink information do not overlap with the frequency domain resources of the second downlink information.

[0352] 8) The specific information element (IE) in the Master Information Block (MIB) indicated by the first downlink information has a specific value. For example, when the specific information element Kssb = 30 (FR1) or 14 (FR2), it indicates that the SSB is a Type 2 SSB.

[0353] 9) The first downlink information is associated with the second downlink information. For example, the association relationship can be: one second downlink information is associated with the repeated transmission of one or more first downlink information; or the association relationship can be: one second downlink information is associated with one or more first downlink information.

[0354] 10) The first downlink information and the second downlink information belong to different reference signal identifier groups, different TRP groups, or different carrier groups. For example, the first downlink information and the second downlink information have different SSB identifiers.

[0355] 11) The first downlink information and the second downlink information have different structures.

[0356] 12) The first downlink information and the second downlink information share the time domain position or frequency domain position of the candidate.

[0357] This embodiment, by providing features of the first downlink information, facilitates the successful reception of the first downlink information by the terminal.

[0358] In some embodiments, after the network-side device receives the target uplink transmission, the method further includes: the network-side device sending feedback information of the target uplink transmission, the feedback information of the target uplink transmission indicating at least one of the following:

[0359] 1) The preamble identifier corresponding to the target uplink transmission.

[0360] 2) The reference signal (SSB) beam identifier or beam group identifier corresponding to the first downlink information.

[0361] 3) The transmission period of the first downlink information.

[0362] 4) The number of cycles of the first downlink information transmission, that is, after the first downlink information is triggered, M cycles will be sent according to cycle T, or M cycles will be sent according to the cycle of the second downlink signal.

[0363] 5) The number of clusters in the first downlink information transmission, i.e., after the first downlink information is triggered, N bursts will be sent according to period T, or N bursts will be sent according to the period of the second downlink signal.

[0364] 6) Duration of the target receiving window, wherein the target receiving window is the window through which the terminal receives feedback information transmitted uplink from the target.

[0365] The downlink information receiving or transmitting method provided in this application can be executed by a downlink information receiving or transmitting device. This application uses the example of a downlink information receiving or transmitting device executing the downlink information receiving or transmitting method to illustrate the downlink information receiving or transmitting device provided in this application.

[0366] This application provides a downlink information receiving or transmitting apparatus. As an example, the downlink information receiving or transmitting apparatus may be a communication device or a component within a communication device, such as a chip. The communication device may be a terminal, a network-side device, or a server, etc. Exemplarily, the terminal may include, but is not limited to, the type of terminal 11 listed above, and the network-side device may include, but is not limited to, the type of network-side device 12 listed above. This application does not impose specific limitations.

[0367] The downlink information receiving or transmitting device includes a receiving module, a transmitting module, and a processing module. These modules can be implemented in software or hardware. When implemented in hardware, the processing module can be implemented by a processor. For example, the processor can include general-purpose processors, special-purpose processors, etc., such as central processing units (CPUs), microprocessors, digital signal processors (DSPs), artificial intelligence (AI) processors, graphics processing units (GPUs), application-specific integrated circuits (ASICs), network processors (NPs), field-programmable gate arrays (FPGAs), or other programmable logic devices, gate circuits, transistors, discrete hardware components, etc. The receiving and transmitting modules can be implemented by a communication interface, which can include one or more of the following: transceivers, pins, circuits, buses, radio frequency units, etc.

[0368] Specifically, referring to Figure 11, when the downlink information receiving device is a terminal or a component in a terminal, the downlink information receiving device 1100 includes the following modules.

[0369] The sending module 1102 is used to send a target uplink transmission, which is used to request the sending of first downlink information.

[0370] The receiving module 1104 is configured to receive the first downlink information; wherein the possible transmission location of the first downlink information is determined by at least one of the following: protocol predefined, network-side device indication, feedback information indication of the target uplink transmission, or second downlink information indication, the second downlink information being transmitted periodically; the first downlink information or the second downlink information includes at least one of the following, or the first downlink information or the second downlink information includes a control channel / search space that schedules at least one of the following: SSB, PSS, SSS, PBCH, DMRS, TRS, CSI-RS, location signal, at least a portion of SIB, and at least a portion of OSI.

[0371] In this embodiment, the terminal can request the transmission of first downlink information on demand through the target uplink transmission, which helps reduce the power consumption of the terminal and network-side equipment. At the same time, the possible transmission location of the first downlink information can be determined by means of protocol predefinition, network-side equipment indication, feedback information indication from the target uplink transmission, or indication of periodically transmitted second downlink information, which helps the terminal to successfully receive the first downlink information. This embodiment also defines the first downlink information and the second downlink information, which helps the terminal determine which first downlink information can be requested on demand and which second downlink information is transmitted periodically, thereby improving the performance of the communication system.

[0372] In some embodiments, the sending module 1102 is configured to send the target uplink transmission when a first condition is met, the first condition including at least one of the following:

[0373] 1) The first downlink information was not received. This example can also be described as the network-side device not sending the first downlink information. This example is beneficial for the terminal to successfully receive the first downlink information.

[0374] 2) Beam failure (BF) occurs, which is beneficial for beam failure recovery.

[0375] 3) A radio link failure (RLF) occurs, which is beneficial for radio link recovery.

[0376] 4) The conditions for cell selection are met. This example is beneficial for the terminal to perform cell selection based on the first downlink information.

[0377] 5) The conditions for cell reselection are met. This example is beneficial for the terminal to perform cell reselection based on the first downlink information.

[0378] 6) Receive N consecutive Out Of Synchronization (OOS) indications, where N is an integer greater than 1.

[0379] For example, during the operation of the T310 timer, after receiving N310 consecutive OOS indications, a finer-grained first downlink message is triggered as a reference signal for the RLM to avoid subsequent RLF declarations.

[0380] 7) The T310 timer is running. The T310 timer is used for wireless link failure detection and wireless link recovery. This example is beneficial for triggering finer-grained first downlink information as a reference signal for the RLM to avoid subsequent RLF declarations.

[0381] 8) The following reselection or handover conditions are met: cell, TRP, carrier, band, subband, and reference signal group. This example is beneficial for the terminal to perform measurements based on the first downlink information.

[0382] 9) The measured value of the reference signal is not greater than the first threshold. The reference signal can be the second downlink information, etc. This example is beneficial for the terminal to perform measurements based on the first downlink information.

[0383] 10) There is a service to be transmitted, for example, a connected or inactive terminal has a service to be transmitted. This example is beneficial for the terminal to perform measurements based on the first downlink information.

[0384] 11) There is an urgent service to be transmitted or the service priority has reached a certain level. For example, a connected terminal or an inactive terminal has an urgent service to be transmitted; or the service priority of the service to be transmitted has reached a certain level. This example is beneficial for the terminal to make measurements based on the first downlink information.

[0385] 12) An uplink or downlink data packet arrives. For example, an uplink data packet arrives at the MAC layer. This example is beneficial for the terminal to perform measurements based on the first downlink information.

[0386] 13) The time interval between the last transmission of the target uplink is not less than the first duration, for example, the time interval between the last transmission of the target uplink (such as the transmission of WUS) is greater than A time units (such as symbols / time slots), so as to ensure that the terminal does not repeatedly transmit WUS multiple times in a short period of time and reduce terminal overhead.

[0387] 14) The second downlink information decoding fails, for example, PBCH decoding fails, SIB1 PDCCH decoding fails, SIB1 PDSCH decoding fails. This example is beneficial for the terminal to perform measurements based on the first downlink information.

[0388] 15) Multiple second downlink information decoding failures reach or exceed the first number, which is beneficial for the terminal to perform measurements based on the first downlink information.

[0389] 16) The number of failed attempts to access the target cell reaches or exceeds the second count. For example, the number of failed PRACH transmissions based on the second downlink information reaches the second count. This example is beneficial for the terminal to access the target cell based on the first downlink information.

[0390] 17) After using a specific transmission power (such as the maximum transmission power), the number of failed attempts to access the target cell reaches or exceeds the second number. For example, if the PRACH transmission power based on the second downlink information reaches a specific value, such as the maximum value, and access to the target cell still fails, the terminal sends the target uplink transmission to request the transmission of the first downlink information. This example is beneficial for the terminal to access the target cell based on the first downlink information.

[0391] 18) The timing advance (TA) for sending the target uplink transmission is effective.

[0392] 19) The number of transmissions of the target uplink transmission is no more than the third number, which can be configured or predefined.

[0393] 20) The target uplink transmission is a retransmission, and the time interval between the last transmission of the target uplink transmission and the last transmission is not less than the second duration.

[0394] 21) The first downlink information is allowed to be sent by the terminal upon request.

[0395] 22) The measured value of the first downlink information that has already been transmitted is not greater than the second threshold. This measured value may be the Reference Signal Receiving Power (RSRP), etc. In this example, the terminal can trigger other more suitable first downlink information through the target uplink transmission.

[0396] 23) The measured value of some of the transmitted first downlink information is less than the measured value of the second downlink information, and this measured value may be RSRP, etc. In this example, the terminal can trigger other more suitable first downlink information through the target uplink transmission.

[0397] 24) The measured value of some of the transmitted first downlink information is less than the measured value of the second downlink information, and the difference is not less than a third threshold. This measured value can be RSRP, etc. In this example, the terminal can trigger other more suitable first downlink information through the target uplink transmission.

[0398] In this embodiment, the terminal sends the target uplink transmission when the first condition is met, which is beneficial for the terminal to send the target uplink transmission at an appropriate time and improve the performance of the communication system.

[0399] In some embodiments, the receiving module 1104 is configured to receive the first downlink information based on resources or configuration of the first downlink information, wherein the resources or configuration of the first downlink information are configured to indicate at least one of the following:

[0400] 1) Allow the type or feature of the terminal that is allowed to measure the first downlink information, for example, only allow terminals with reduced capability (RedCap UE) to measure the first downlink information.

[0401] 2) The reference signal identifier or reference signal group identifier corresponding to the first downlink information, such as SSB identifier (SSB index) or SSB group identifier (SSB group index).

[0402] 3) The content included in the first downlink information, such as the first downlink information only including PSS and SSS, or the first downlink information including PSS, SSS and simplified PBCH, which occupies 12 physical resource blocks (PRB).

[0403] 4) Repeated transmission of the first downlink information, for example, the number of times it is repeated.

[0404] 5) The transmission power of the first downlink information.

[0405] 6) The terminal radio resource control (RRC) state associated with the first downlink information, which may include RRC idle state, RRC inactive state, RRC connected state, network power saving state (NES state), non-network power saving state (non-NES state), etc.

[0406] 7) The transmission period of the first downlink information, which may be referred to as the period (Time period) thereafter, is related to the timing of SSB to RO or WUS, or the time window related to SSB to PRACH / WUS repetition.

[0407] 8) The number of cycles of the first downlink information transmission, that is, after the first downlink information is triggered, M cycles will be sent according to cycle T, or M cycles will be sent according to the cycle of the second downlink signal.

[0408] 9) The number of bursts in the first downlink information transmission, i.e., after the first downlink information is triggered, N bursts will be sent according to period T, or N bursts will be sent according to the period of the second downlink signal.

[0409] 10) Quasi-Co-Location (QCL) information of the first downlink information.

[0410] 11) QCL information, beams, reference signals, or channel resources associated with different parts of the first downlink information. For example, the first downlink information contains multiple parts, and different parts are associated with different PRACH resources. Based on the found PRACH, the network-side device determines that the transmission characteristics (e.g., beam) of subsequent downlink signals / channels can be the same as the transmission characteristics of the first downlink information part associated with the PRACH. This embodiment is beneficial to improving the reliability of the transmission of other downlink signals / channels.

[0411] 12) Different repeated transmissions of the first downlink information are associated with QCL information, beams, reference signals or channel resources respectively. For example, the first downlink information is transmitted multiple times, and different repeated transmissions are associated with different PRACH resources. Based on the found PRACH, the network-side device determines that the transmission characteristics (e.g., beam) of other subsequent downlink signals / channels can be the same as the transmission characteristics of the repeated transmissions of the first downlink information associated with the PRACH. This embodiment is beneficial to improving the reliability of other downlink signal / channel transmissions.

[0412] 13) Whether the first downlink information and the second downlink information belong to the same Band Width Part (BWP).

[0413] 14) The search step size of the Sync raster for the first downlink information.

[0414] 15) Whether the first downlink information is located on the synchronization grid.

[0415] 16) The transmission frequency of the first downlink information, such as the synchronization grid, or the frequency offset relative to the second downlink information, or the BWP where the first downlink information is located.

[0416] 17) Time and frequency resource configuration of the first downlink information.

[0417] 18) Common RNTI (Temporary Identifier for Public Radio Networks). This example helps the terminal determine, based on the Common RNTI, whether the first downlink information is already in a transmitting state, an active state, or has been triggered.

[0418] 19) Search space. This example helps the terminal determine, based on the search space, whether the first downlink information is already in a sending state, in an active state, or has been triggered.

[0419] 20) Whether the first downlink information is allowed to be requested by the terminal.

[0420] This embodiment, by providing resources or configurations for the first downlink information, helps the terminal determine the time domain location, frequency domain location, or frequency point of the first downlink information, which is beneficial for the terminal to successfully receive the first downlink information.

[0421] In some embodiments, the apparatus further includes a first processing module, configured to determine the resources or configuration of the first downlink information based on at least one of the following:

[0422] 1) Indication or configuration of the SIB of the target cell. The SIB may include SIB1, SIBX, etc. The target cell may be the cell where the terminal sends the target uplink transmission, the cell that sends the first downlink information, or the cell that provides the configuration for sending the target uplink transmission.

[0423] 2) The indication of the second downlink information.

[0424] 3) Predefined information, such as a resource allocation table that predefines the resources of the first downlink information relative to the resources of the second downlink information. This resource allocation table may include corresponding time-domain resources, frequency-domain resources, sequence resources, spatial resources, signal formats, and may also include resource allocation information of the target uplink transmission resources that trigger the first downlink signal.

[0425] 4) Indication of the target uplink transmission.

[0426] 5) Indication of feedback information transmitted uplink to the target.

[0427] 6) Dedicated RRC signaling, downlink control information (DCI), media access control control element (MAC CE), RRC resume signaling, or RRC release signaling indication. For example, for a connected terminal, the network-side device can indicate the configuration of the first downlink information through dedicated RRC signaling.

[0428] 7) Paging message or paging DCI instruction.

[0429] 8) System Information Notification (SI) Instructions.

[0430] 9) System message update instructions.

[0431] 10) The frequency band, carrier, subband, BWP, frequency range, or synchronization grid in which the first downlink information is located.

[0432] 11) The frequency band, carrier, subband, BWP, frequency range, or synchronization grid in which the second downlink information is located.

[0433] This embodiment facilitates the terminal's flexible acquisition of resources or configurations for the first downlink information.

[0434] In some embodiments, the apparatus further includes a second processing module, configured to determine, based on at least one of the following, whether random access or a connection establishment request can be initiated based on the first downlink information:

[0435] 1) The first downlink information is located at a specific frequency position or on a synchronization grid.

[0436] For example, if the first downlink information is located at a specific frequency position or on a synchronization grid, the idle terminal considers itself capable of making a random access / initiating a connection establishment request based on the first downlink information. In other embodiments, if the first downlink information is located at a specific frequency position or on a synchronization grid, the idle terminal considers itself unable to make a random access / initiating a connection establishment request based on the first downlink information.

[0437] 2) The level or type of the first downlink information.

[0438] For example, the first downlink information is an SSB, which implicitly or explicitly indicates its SSB level (e.g., stage 1 or stage 2) or SSB type (e.g., Type 1 or Type 2). If the first downlink information is stage 2 or of type Type 2, the terminal can determine that it can perform random access or initiate a connection establishment request based on the first downlink information.

[0439] 3) The indication of the first downlink information.

[0440] For example, the first downlink information implicitly or explicitly indicates whether the first downlink information can be used for random access or whether it can be used to initiate a connection establishment request.

[0441] 4) The first downlink information is associated with the Physical Random Access Channel (PRACH), mapped to the PRACH, associated with the RACH occasion (RO), or associated with the WUS occasion (wake up signal occasion).

[0442] For example, if the first downlink information implicitly or explicitly indicates that it is associated with PRACH, mapped to PRACH, associated with RACH timing, or associated with WUS timing, the terminal determines that it can perform random access or initiate a connection establishment request based on the first downlink information.

[0443] 5) The first downlink information is associated with an idle terminal.

[0444] For example, the first downlink information can implicitly or explicitly indicate whether it is associated with an idle terminal or a connected terminal. If the first downlink information is associated with an idle terminal, the terminal determines that it can perform random access or initiate a connection establishment request based on the first downlink information.

[0445] 6) The first downlink information applies to idle terminals.

[0446] For example, the first downlink information implicitly or explicitly indicates whether it is applicable to the idle terminal. If the first downlink information is applicable to the idle terminal, the terminal determines that it can perform random access or initiate a connection establishment request based on the first downlink information.

[0447] The aforementioned explicit indication may include: the first downlink information including a MIB, adding a bit to the MIB, or explicitly indicating using a spare bit in the MIB.

[0448] The aforementioned implicit indication may include: the first downlink information includes a MIB, the existing field in the MIB is redefined, and Kssb in the first downlink information is used as an indication. When Kssb = 30 (FR1) or 14 (FR2): for 6G idle state terminals, it is considered that random access cannot be performed based on the first downlink information. The idle state terminal further uses pdcch-ConfigSIB1 to find the frequency domain location (such as GSCN) of the SSB that can be accessed; for 6G connected state terminals, the SSB is understood to be a Type 2 SSB, and it is understood that the Type 2 SSB only transmits for one time window, or only transmits for a few quantities or periods, and measurement can only be performed based on the Type 2 SSB.

[0449] 7) The measured value of the first downlink information (e.g., RSRP, and so on) is not less than the fourth threshold.

[0450] 8) The measured value of the first downlink information is greater than the measured value of the second downlink information.

[0451] 9) The measured value of the first downlink information is greater than the measured value of the second downlink information and the difference is not less than the fifth threshold.

[0452] 10) The average of the measurements of multiple first downlink information is not less than the sixth threshold.

[0453] 11) The mean of the measurements of multiple first downlink information items within the target time period is greater than the mean of the measurements of multiple second downlink information items.

[0454] 12) Within the target time period, the mean of the measurements of multiple first downlink information is greater than the mean of the measurements of multiple second downlink information and the difference is not less than the seventh threshold.

[0455] In some embodiments, the apparatus further includes a third processing module for determining, based on at least one of the following, that the first downlink information is used solely for measurement:

[0456] 1) The first downlink information is located at a specific frequency position or on a synchronization grid.

[0457] For example, if the first downlink information is located at a specific frequency position or on a synchronization grid, the idle terminal considers the first downlink information to be used only for measurement.

[0458] 2) The level or type of the first downlink information.

[0459] For example, the first downlink information is an SSB, which implicitly or explicitly indicates its SSB level (e.g., stage1 or stage2) or SSB type (e.g., Type1 or Type2). If the first downlink information is stage1 or of type Type1, the terminal can determine that the first downlink information is only used for measurement.

[0460] 3) The indication of the first downlink information.

[0461] For example, the first downlink information may implicitly or explicitly indicate whether the first downlink information is used only for measurement.

[0462] 4) The first downlink information is not associated with PRACH, is not mapped to PRACH, is not associated with RACH timing, or is not associated with WUS timing.

[0463] For example, if the first downlink information implicitly or explicitly indicates that it is not associated with PRACH, is not mapped to PRACH, is not associated with RACH timing, or is not associated with WUS timing, the terminal determines that the first downlink information is only used for measurement.

[0464] 5) The first downlink information is associated with the connected terminal.

[0465] For example, the first downlink information can implicitly or explicitly indicate whether it is associated with an idle terminal or a connected terminal. If the first downlink information is associated with a connected terminal, the terminal determines that the first downlink information is only used for measurement.

[0466] 6) The first downlink information is not applicable to idle terminals.

[0467] For example, the first downlink information implicitly or explicitly indicates whether it is applicable to the idle state terminal. If the first downlink information is not applicable to the connected state terminal, the terminal determines that the first downlink information is only used for measurement.

[0468] 7) The measured value of the first downlink information is not less than the fourth threshold.

[0469] 8) The measured value of the first downlink information is greater than the measured value of the second downlink information.

[0470] 9) The measured value of the first downlink information is greater than the measured value of the second downlink information and the difference is not less than the fifth threshold.

[0471] 10) The average of the measurements of multiple first downlink information is not less than the sixth threshold.

[0472] 11) The mean of the measurements of multiple first downlink information items within the target time period is greater than the mean of the measurements of multiple second downlink information items.

[0473] 12) Within the target time period, the mean of the measurements of multiple first downlink information is greater than the mean of the measurements of multiple second downlink information and the difference is not less than the seventh threshold.

[0474] In some embodiments, the apparatus further includes a fourth processing module, configured to determine the resource location of a reference signal that allows random access, based on the first downlink information, feedback information of the target uplink transmission, or the resources or configuration of the first downlink information, when it is determined that random access and connection establishment requests cannot be initiated based on the first downlink information, or that the first downlink information cannot be used for measurement.

[0475] In some embodiments, the apparatus further includes a fifth processing module, configured to determine, based on at least one of the following, that the first downlink information is in a transmission state, in an active state, or has been triggered:

[0476] 1) A DCI scrambled with a specific RNTI (e.g., a specific common RNTI) is found in a specific search space (e.g., common SS), and the DCI is used to schedule the feedback information of the uplink transmission of the target.

[0477] The specific RNTI and specific search space mentioned above can be predefined by the protocol or included in the configuration of the first downlink information.

[0478] For example, if the first downlink information is an OD-SSB, and the terminal can find a DCI scrambled with a specific RNTI, the terminal assumes that the network-side device will send the OD-SSB at a potential transmission location in the next cycle. If the terminal does not find a DCI scrambled with a specific RNTI, the terminal assumes that the OD-SSB has not been sent and can send a target uplink transmission (such as WUS) request for the OD-SSB.

[0479] 2) The feedback information of the DCI scheduling with specific RNTI scrambling (such as RAR or WUS response) found contains the preamble identifier corresponding to the target uplink transmission.

[0480] For example, if the target uplink transmission is UL WUS and the feedback information is RAR, and if the RAR contains a preamble identifier corresponding to UL WUS (any preamble for UL WUS), then the terminal believes that the network-side device will send OD-SSB at a possible location in the next cycle's OD-SSB, where the first downlink information is OD-SSB.

[0481] If the terminal receives DCI via blind search and also receives RAR, then RAR can indicate that the first downlink information will be sent for X more cycles, where X is indicated by RAR.

[0482] 3) The first downlink information was blindly detected at a possible transmission location of the first downlink information.

[0483] For example, based on the configuration of the first downlink information, the terminal performs blind detection at the possible transmission location of the first downlink information, that is, the terminal directly performs blind detection of the first downlink information at the possible transmission location of the first downlink information before transmitting the target uplink transmission.

[0484] In this example, the duration of blind detection required by the terminal and the number of blind detection cycles needed to determine whether the OD-SSB is broadcasting or not can be determined by the protocol or by the network-side device configuration.

[0485] 4) The network-side device indicates that the first downlink information is in the sending state, in the active state, or has been triggered.

[0486] The network-side device may indicate whether the first downlink information associated with the second downlink information is being transmitted; the end position of the transmission of the first downlink information associated with the second downlink information, such as the end of transmission after the Yth cycle following the second downlink information, or the fact that the associated first downlink information will be transmitted for Z cycles after the second downlink information.

[0487] The network-side device may indicate the information by: using newly added bits in the MIB of the second downlink information; or by using idle bits in the MIB of the second downlink information.

[0488] In one example, RRC signaling, MAC CE, DCI, and paging messages indicate that the current first downlink information is being sent and how long it has been sent.

[0489] The processing modules in the various embodiments of this application, such as at least one of the first to fifth processing modules, may be the same module or different modules.

[0490] In some embodiments, the receiving module 1104 is further configured to receive feedback information of the target uplink transmission, the feedback information of the target uplink transmission being used to indicate at least one of the following:

[0491] 1) The preamble identifier corresponding to the target uplink transmission.

[0492] 2) The reference signal (SSB) beam identifier or beam group identifier corresponding to the first downlink information.

[0493] 3) The transmission period of the first downlink information.

[0494] 4) The number of cycles of the first downlink information transmission, that is, after the first downlink information is triggered, M cycles will be sent according to cycle T, or M cycles will be sent according to the cycle of the second downlink signal.

[0495] 5) The number of clusters in the first downlink information transmission, i.e., after the first downlink information is triggered, N bursts will be sent according to period T, or N bursts will be sent according to the period of the second downlink signal.

[0496] 6) Duration of the target receiving window, wherein the target receiving window is the window through which the terminal receives feedback information transmitted uplink from the target.

[0497] In some embodiments, the receiving module 1104 is further configured to perform one of the following when the first downlink information and the second downlink information overlap:

[0498] 1) Only the first downlink information is received.

[0499] 2) Only the second downlink information is received.

[0500] 3) Only the earlier of the first downlink information and the second downlink information in the time domain is received.

[0501] 4) Only receive the one containing the PBCH load between the first downlink information and the second downlink information.

[0502] In this embodiment, the first downlink information and the second downlink information overlap, which can be in the time domain, in the frequency domain, or in both the time domain and the frequency domain.

[0503] In this embodiment, the terminal can determine the corresponding receiving behavior based on the priority of the first downlink information and the second downlink information.

[0504] Referring to Figure 12, when the downlink information transmitting device is a network-side device or a component within a network-side device, the downlink information transmitting device 1200 includes the following modules.

[0505] The receiving module 1202 is used to receive the target uplink transmission, which is used to request the transmission of the first downlink information.

[0506] The transmitting module 1204 is used to transmit the first downlink information; wherein the possible transmission location of the first downlink information is determined by at least one of the following: protocol predefined, network-side device indication, feedback information indication of the target uplink transmission, or second downlink information indication, and the second downlink information is transmitted periodically; the first downlink information or the second downlink information includes at least one of the following, or the first downlink information or the second downlink information includes a control channel / search space that schedules at least one of the following: SSB, PSS, SSS, PBCH, DMRS, TRS, CSI-RS, location signal, at least a portion of SIB, and at least a portion of OSI.

[0507] In this embodiment, the terminal can request the transmission of first downlink information on demand through the target uplink transmission, which helps reduce the power consumption of the terminal and network-side equipment. At the same time, the possible transmission location of the first downlink information can be determined by means of protocol predefinition, network-side equipment indication, feedback information indication from the target uplink transmission, or indication of periodically transmitted second downlink information, which helps the terminal to successfully receive the first downlink information. This embodiment also defines the first downlink information and the second downlink information, which helps the terminal determine which first downlink information can be requested on demand and which second downlink information is transmitted periodically, thereby improving the performance of the communication system.

[0508] In some embodiments, the sending module 1204 is further configured to indicate to the terminal the resources or configuration of the first downlink information, wherein the resources or configuration of the first downlink information are used to indicate at least one of the following:

[0509] 1) Allow the type or feature of the terminal that is allowed to measure the first downlink information, for example, only allow terminals with reduced capability (RedCap UE) to measure the first downlink information.

[0510] 2) The reference signal identifier or reference signal group identifier corresponding to the first downlink information, such as SSB identifier (SSB index) or SSB group identifier (SSB group index).

[0511] 3) The content included in the first downlink information, such as the first downlink information only including PSS and SSS, or the first downlink information including PSS, SSS and simplified PBCH, which occupies 12 physical resource blocks (PRB).

[0512] 4) Repeated transmission of the first downlink information, for example, the number of times it is repeated.

[0513] 5) The transmission power of the first downlink information.

[0514] 6) The terminal radio resource control (RRC) state associated with the first downlink information, which can be RRC idle state, RRC inactive state, RRC connected state, network power saving state (NES state), non-network power saving state (non-NES state), etc.

[0515] 7) The transmission period of the first downlink information, which may be referred to as the period (Time period) thereafter, is related to the timing of SSB to RO or WUS, or the time window related to SSB to PRACH / WUS repetition.

[0516] 8) The number of cycles of the first downlink information transmission, that is, after the first downlink information is triggered, M cycles will be sent according to cycle T, or M cycles will be sent according to the cycle of the second downlink signal.

[0517] 9) The number of bursts in the first downlink information transmission, i.e., after the first downlink information is triggered, N bursts will be sent according to period T, or N bursts will be sent according to the period of the second downlink signal.

[0518] 10) Quasi-Co-Location (QCL) information of the first downlink information.

[0519] 11) QCL information, beams, reference signals, or channel resources associated with different parts of the first downlink information. For example, the first downlink information contains multiple parts, and different parts are associated with different PRACH resources. Based on the found PRACH, the network-side device determines that the transmission characteristics (e.g., beam) of subsequent downlink signals / channels can be the same as the transmission characteristics of the first downlink information part associated with the PRACH. This embodiment is beneficial to improving the reliability of the transmission of other downlink signals / channels.

[0520] 12) Different repeated transmissions of the first downlink information are associated with QCL information, beams, reference signals or channel resources respectively. For example, the first downlink information is transmitted multiple times, and different repeated transmissions are associated with different PRACH resources. Based on the found PRACH, the network-side device determines that the transmission characteristics (e.g., beam) of other subsequent downlink signals / channels can be the same as the transmission characteristics of the repeated transmissions of the first downlink information associated with the PRACH. This embodiment is beneficial to improving the reliability of other downlink signal / channel transmissions.

[0521] 13) Whether the first downlink information and the second downlink information belong to the same Band Width Part (BWP).

[0522] 14) The search step size of the Sync raster for the first downlink information.

[0523] 15) Whether the first downlink information is located on the synchronization grid.

[0524] 16) The transmission frequency of the first downlink information, such as the synchronization grid, or the frequency offset relative to the second downlink information, or the BWP where the first downlink information is located.

[0525] 17) Time and frequency resource configuration of the first downlink information.

[0526] 18) Common RNTI (Temporary Identifier for Public Radio Networks). This example helps the terminal determine, based on the Common RNTI, whether the first downlink information is already in a transmitting state, an active state, or has been triggered.

[0527] 19) Search space. This example helps the terminal determine, based on the search space, whether the first downlink information is already in a sending state, in an active state, or has been triggered.

[0528] 20) Whether the first downlink information is allowed to be requested by the terminal.

[0529] This embodiment, by providing resources or configurations for the first downlink information, helps the terminal determine the time domain location, frequency domain location, or frequency point of the first downlink information, which is beneficial for the terminal to successfully receive the first downlink information.

[0530] In some embodiments, the first downlink information includes at least one of the following features:

[0531] 1) It is a subset of SSBs in the entire candidate SSB beam set. For example, it can be indicated by a bitmap (such as an SSB index) that indicates at least one SSB in the candidate SSB beam set. The fields of the bitmap can be similar to ssb-PositionsInBurst in NR.

[0532] 2) Not on the sync rater.

[0533] 3) Located on a specific sync raster, which only allows specific terminals to perform measurements. This specificity can be, at most, the terminal type / feature corresponding to the terminal that the first downlink information is allowed to measure; or, the specific sync raster only allows terminals in a specific RRC state (e.g., RRC connected) to perform measurements. In this example, different sync rasteres and different terminal features have a mapping relationship, and the terminal can determine the sync raster where the first downlink information is located based on the supported terminal features.

[0534] 4) The period of the first downlink information is the same as the period of the second downlink information.

[0535] 5) The frequency of the first downlink information is the same as the frequency of the second downlink information or is located on the same synchronization grid. In other examples, the frequency of the first downlink information is different from the frequency of the second downlink information or is located on different synchronization grids.

[0536] 6) The time-domain resources of the first downlink information overlap or are time-division multiplexed with the time-domain resources of the second downlink information. In other examples, the time-domain resources of the first downlink information do not overlap with the time-domain resources of the second downlink information.

[0537] 7) The frequency domain resources of the first downlink information overlap or are frequency-division multiplexed with the frequency domain resources of the second downlink information. In other examples, the frequency domain resources of the first downlink information do not overlap with the frequency domain resources of the second downlink information.

[0538] 8) The specific information element (IE) in the Master Information Block (MIB) indicated by the first downlink information has a specific value. For example, when the specific information element Kssb = 30 (FR1) or 14 (FR2), it indicates that the SSB is a Type 2 SSB.

[0539] 9) The first downlink information is associated with the second downlink information. For example, the association relationship can be: one second downlink information is associated with the repeated transmission of one or more first downlink information; or the association relationship can be: one second downlink information is associated with one or more first downlink information.

[0540] 10) The first downlink information and the second downlink information belong to different reference signal identifier groups, different TRP groups, or different carrier groups. For example, the first downlink information and the second downlink information have different SSB identifiers.

[0541] 11) The first downlink information and the second downlink information have different structures.

[0542] 12) The first downlink information and the second downlink information share the time domain position or frequency domain position of the candidate.

[0543] This embodiment, by providing features of the first downlink information, facilitates the successful reception of the first downlink information by the terminal.

[0544] In some embodiments, the sending module 1204 is further configured to send feedback information of the target uplink transmission, the feedback information of the target uplink transmission being used to indicate at least one of the following:

[0545] 1) The preamble identifier corresponding to the target uplink transmission.

[0546] 2) The reference signal (SSB) beam identifier or beam group identifier corresponding to the first downlink information.

[0547] 3) The transmission period of the first downlink information.

[0548] 4) The number of cycles of the first downlink information transmission, that is, after the first downlink information is triggered, M cycles will be sent according to cycle T, or M cycles will be sent according to the cycle of the second downlink signal.

[0549] 5) The number of clusters in the first downlink information transmission, i.e., after the first downlink information is triggered, N bursts will be sent according to period T, or N bursts will be sent according to the period of the second downlink signal.

[0550] 6) Duration of the target receiving window, wherein the target receiving window is the window through which the terminal receives feedback information transmitted uplink from the target.

[0551] The downlink information receiving or transmitting device provided in this application embodiment can implement the various processes implemented in the method embodiments of Figures 2 to 10 and achieve the same technical effect. To avoid repetition, it will not be described again here.

[0552] As shown in Figure 13, this application embodiment also provides a communication device 1300, including a processor 1301 and a memory 1302. The memory 1302 stores a program or instructions that can run on the processor 1301. For example, when the communication device 1300 is a terminal, the program or instructions executed by the processor 1301 implement the various steps of the above-described downlink information receiving method embodiment and achieve the same technical effect. When the communication device 1300 is a network-side device, the program or instructions executed by the processor 1301 implement the various steps of the above-described downlink information sending method embodiment and achieve the same technical effect. To avoid repetition, this will not be described again here.

[0553] This application also provides a terminal, including a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run programs or instructions to implement the steps in the method embodiment shown in FIG2. This terminal embodiment corresponds to the above-described terminal-side method embodiment, and all implementation processes and methods of the above-described method embodiments can be applied to this terminal embodiment and can achieve the same technical effect. The terminal can be the downlink information receiving device shown in FIG11. Specifically, FIG14 is a schematic diagram of the hardware structure of a terminal implementing an embodiment of this application.

[0554] The terminal 1400 includes, but is not limited to, at least some of the following components: radio frequency unit 1401, network module 1402, audio output unit 1403, input unit 1404, sensor 1405, display unit 1406, user input unit 1407, interface unit 1408, memory 1409, and processor 1410.

[0555] Those skilled in the art will understand that the terminal 1400 may also include a power supply (such as a battery) for powering various components. The power supply can be logically connected to the processor 1410 through a power management system, thereby enabling functions such as charging, discharging, and power consumption management through the power management system. The terminal structure shown in Figure 14 does not constitute a limitation on the terminal. The terminal may include more or fewer components than shown, or combine certain components, or have different component arrangements, which will not be elaborated here.

[0556] It should be understood that, in this embodiment, the input unit 1404 may include a graphics processor 14041 and a microphone 14042. The graphics processor 14041 processes image data of still images or videos obtained by an image capture device (such as a camera) in video capture mode or image capture mode. The display unit 1406 may include a display panel 14061, which may be configured in the form of a liquid crystal display, an organic light-emitting diode, or the like. The user input unit 1407 includes at least one of a touch panel 14071 and other input devices 14072. The touch panel 14071 is also called a touch screen. The touch panel 14071 may include a touch detection device and a touch controller. Other input devices 14072 may include, but are not limited to, physical keyboards, function keys (such as volume control buttons, power buttons, etc.), trackballs, mice, and joysticks, which will not be described in detail here.

[0557] In this embodiment, after receiving downlink data from the network-side device, the radio frequency unit 1401 can transmit it to the processor 1410 for processing; in addition, the radio frequency unit 1401 can send uplink data to the network-side device. Typically, the radio frequency unit 1401 includes, but is not limited to, antennas, amplifiers, transceivers, couplers, low-noise amplifiers, duplexers, etc.

[0558] The memory 1409 can be used to store software programs or instructions, as well as various data. The memory 1409 may primarily include a first storage area for storing programs or instructions and a second storage area for storing data. The first storage area may store the operating system, application programs or instructions required for at least one function (such as sound playback, image playback, etc.). Furthermore, the memory 1409 may include volatile memory or non-volatile memory. The non-volatile memory may be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), or flash memory. Volatile memory can be random access memory (RAM), static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDRSDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM), and direct memory bus RAM (DRRAM). The memory 1409 in this embodiment includes, but is not limited to, these and any other suitable types of memory.

[0559] Processor 1410 may include one or more processing units; optionally, processor 1410 integrates an application processor and a modem processor, wherein the application processor mainly handles operations involving the operating system, user interface, and applications, and the modem processor mainly handles wireless communication signals, such as a baseband processor. It is understood that the aforementioned modem processor may also not be integrated into processor 1410.

[0560] The radio frequency unit 1401 is used to transmit a target uplink transmission, which is used to request the transmission of first downlink information; and to receive the first downlink information; wherein the possible transmission location of the first downlink information is determined by at least one of the following: protocol predefined, network-side device indication, feedback information indication of the target uplink transmission, or second downlink information indication, and the second downlink information is transmitted periodically; the first downlink information or the second downlink information includes at least one of the following, or the first downlink information or the second downlink information includes a control channel / search space that schedules at least one of the following: SSB, PSS, SSS, PBCH, DMRS, TRS, CSI-RS, location signal, at least a portion of SIB, and at least a portion of OSI.

[0561] The terminal provided in this application embodiment can request the transmission of first downlink information on demand through the target uplink transmission, which helps reduce the power consumption of the terminal and network-side equipment. At the same time, the possible transmission location of the first downlink information can be determined by means of protocol predefinition, network-side equipment indication, feedback information indication from the target uplink transmission, or indication of periodically transmitted second downlink information, which helps the terminal to successfully receive the first downlink information. This embodiment also defines the first downlink information and the second downlink information, which helps the terminal determine which first downlink information can be requested on demand and which second downlink information is transmitted periodically, thereby improving the performance of the communication system.

[0562] It is understood that the implementation process of each implementation method mentioned in this embodiment can refer to the relevant description of the downlink information receiving method embodiment and achieve the same or corresponding technical effects. To avoid repetition, it will not be described again here.

[0563] This application also provides a network-side device, including a processor and a communication interface. The communication interface is coupled to the processor, and the processor is used to run programs or instructions to implement the steps of the method embodiment shown in FIG10. This network-side device embodiment corresponds to the above-described network-side device method embodiment. All implementation processes and methods of the above-described method embodiments can be applied to this network-side device embodiment and can achieve the same technical effect.

[0564] Specifically, this application embodiment also provides a network-side device, which can be the downlink information transmitting device shown in FIG12. As shown in FIG15, the network-side device 1500 includes: an antenna 151, a radio frequency device 152, a baseband device 153, a processor 154, and a memory 155. The antenna 151 is connected to the radio frequency device 152. In the uplink direction, the radio frequency device 152 receives information through the antenna 151 and sends the received information to the baseband device 153 for processing. In the downlink direction, the baseband device 153 processes the information to be transmitted and sends it to the radio frequency device 152. The radio frequency device 152 processes the received information and transmits it through the antenna 151.

[0565] The method executed by the network-side device in the above embodiments can be implemented in the baseband device 153, which includes a baseband processor.

[0566] The baseband device 153 may include at least one baseband board, on which multiple chips are disposed, as shown in FIG15. One of the chips is, for example, a baseband processor, which is connected to the memory 155 via a bus interface to call the program or instructions in the memory 155 to execute the network-side device operation shown in the above method embodiment.

[0567] The network-side device may also include a network interface 156, such as a Common Public Radio Interface (CPRI).

[0568] The radio frequency device 152 is used to receive a target uplink transmission, which is used to request the transmission of first downlink information; and to transmit the first downlink information; wherein the possible transmission location of the first downlink information is determined by at least one of the following: protocol predefined, network-side device indication, feedback information indication of the target uplink transmission, or second downlink information indication, and the second downlink information is transmitted periodically; the first downlink information or the second downlink information includes at least one of the following, or the first downlink information or the second downlink information includes a control channel / search space that schedules at least one of the following: SSB, PSS, SSS, PBCH, DMRS, TRS, CSI-RS, location signal, at least a portion of SIB, and at least a portion of OSI.

[0569] In addition, the network-side device 1500 of this application embodiment also includes: a program or instructions stored in the memory 155 and executable on the processor 154. The processor 154 calls the program or instructions in the memory 155 to execute the methods executed by each module shown in FIG12 and achieve the same technical effect. To avoid repetition, it will not be described in detail here.

[0570] This application also provides a readable storage medium storing a program or instructions. When the program or instructions are executed by a processor, they implement the various processes of the above-described method embodiments for receiving or sending downlink information and achieve the same technical effect. To avoid repetition, they will not be described again here.

[0571] The processor mentioned above is either the processor in the terminal described in the above embodiments or the processor in the network-side device. The readable storage medium includes computer-readable storage media, such as computer read-only memory (ROM), random access memory (RAM), magnetic disk, or optical disk. In some examples, the readable storage medium may be a non-transient readable storage medium.

[0572] This application embodiment also provides a chip, which includes a processor and a communication interface. The communication interface and the processor are coupled. The processor is used to run programs or instructions to implement the various processes of the above-described downlink information receiving or sending method embodiments, and can achieve the same technical effect. To avoid repetition, it will not be described again here.

[0573] It should be understood that the chip mentioned in the embodiments of this application may also be referred to as a system-on-a-chip, system chip, chip system, or system-on-a-chip, etc.

[0574] This application also provides a computer program / program product, which is stored in a storage medium and executed by at least one processor to implement the various processes of the above-described method embodiments for receiving or sending downlink information, and can achieve the same technical effect. To avoid repetition, it will not be described again here.

[0575] This application also provides a downlink information receiving or sending system, including: a terminal and a network-side device, wherein the terminal can be used to perform the steps of the downlink information receiving method described above, and the network-side device can be used to perform the steps of the downlink information sending method described above.

[0576] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0577] From the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of computer software products plus necessary general-purpose hardware platforms, and of course, they can also be implemented by hardware. The computer software product is stored in a storage medium (such as ROM, RAM, magnetic disk, optical disk, etc.), and the computer software product includes several instructions to cause the terminal or network-side device to execute the methods described in the various embodiments of this application.

[0578] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other implementations under the guidance of this application without departing from the spirit and scope of the claims. All of these implementations are within the protection scope of this application.

Claims

1. A method for receiving downlink information, comprising: The terminal sends a target uplink transmission, which is used to request the transmission of first downlink information; The terminal receives the first downlink information; The possible transmission location of the first downlink information is determined by at least one of the following: protocol predefined, network-side device indication, feedback information indication of the target uplink transmission, or second downlink information indication, wherein the second downlink information is transmitted periodically; The first downlink information or the second downlink information includes at least one of the following, or the first downlink information or the second downlink information includes a control channel / search space that schedules at least one of the following: synchronization signal and physical broadcast channel block SSB, primary synchronization signal PSS, secondary synchronization signal SSS, physical broadcast channel PBCH, demodulation reference signal DMRS, tracking reference signal TRS, channel state information reference signal CSI-RS, positioning signal, at least a portion of system information block SIB and at least a portion of other system information OSI.

2. The method according to claim 1, wherein, The terminal sending the target uplink transmission includes: the terminal sending the target uplink transmission when a first condition is met, wherein the first condition includes at least one of the following: The first downlink information was not received; Beam failure (BF) occurred; Radio link failure (RLF) occurred; The conditions for selecting a residential community must be met; The conditions for community re-election are met; Receive N consecutive Out-of-Synchronization (OOS) indications, where N is an integer greater than 1; Timer T310 is running; The following reselection or handover conditions must be met: cell, transmit / receive point (TRP), carrier, frequency band, subband, and reference signal group; The measured value of the reference signal is not greater than the first threshold. There is a service to be transmitted; There is urgent business to be transmitted or the business priority reaches a specific level; Uplink or downlink data packets have arrived; The time interval since the last uplink transmission of the target is not less than a first duration; The second downlink information decoding failed; Multiple second downlink information decoding failures reached or exceeded the first number; The number of failed attempts to access the target cell has reached or exceeded the second count; The number of failed attempts to access the target cell after using a specific transmission power reaches or exceeds the second count; The timing advance TA for sending the target uplink transmission is effective; The number of times the target uplink transmission is sent is no greater than the third time; The target uplink transmission is a retransmission, and the time interval between the last transmission of the target uplink transmission and the last transmission is not less than the second duration; The first downlink information can be sent upon request by the terminal; The measured value of the first downlink information that has already been transmitted is not greater than the second threshold; The measured value of some of the transmitted first downlink information is less than the measured value of the second downlink information; The measured value of some of the transmitted first downlink information is less than the measured value of the second downlink information and the difference is not less than the third threshold.

3. The method according to claim 1 or 2, wherein, The terminal receiving the first downlink information includes: the terminal receiving the first downlink information based on resources or configuration of the first downlink information, wherein the resources or configuration of the first downlink information are used to indicate at least one of the following: The type or characteristics of the terminal that is allowed to measure the first downlink information; The reference signal identifier or reference signal group identifier corresponding to the first downlink information; The content contained in the first downlink information; Repeated transmission of the first downlink information; The transmission power of the first downlink information; The terminal radio resource control (RRC) status associated with the first downlink information; The transmission period of the first downlink information; The number of cycles of the first downlink information transmission; The number of clusters in the first downlink information transmission; The quasi-co-address QCL information of the first downlink information; Different parts of the first downlink information are respectively associated with QCL information, beam, reference signal or channel resources; The different repeated transmissions of the first downlink information are respectively associated with QCL information, beam, reference signal or channel resources; Whether the first downlink information and the second downlink information belong to the same bandwidth portion (BWP); The synchronous grid search step size of the first downlink information; Whether the first downlink information is located on the synchronization grid; The transmission frequency of the first downlink information; The time-frequency resource configuration of the first downlink information; Public wireless network temporary identifier (RNTI); Search space; Whether the first downlink information is allowed to be requested by the terminal.

4. The method according to claim 3, wherein, The transmission frequency of the first downlink information is indicated by at least one of the following: Absolute wireless channel number ARFCN; The offset relative to a specific frequency; The frequency offset of a specific frequency position of the first downlink information relative to a specific frequency position of the second downlink information; Global Synchronization Channel Number (GSCN).

5. The method according to claim 3, wherein, The time-frequency resource configuration of the first downlink information includes at least one of the following: The first downlink information is offset in the time domain relative to the second downlink information; The first downlink information is offset in the frequency domain relative to the second downlink information; The transmission period of the first downlink information and the offset of the transmission position of the first downlink information relative to the start of the period within each period; The first downlink information is offset in the time domain relative to the target uplink transmission; The first downlink information is offset in the time domain relative to the feedback information transmitted uplink to the target. The offset of the first downlink information relative to the start or end position of the target receiving window, wherein the target receiving window is the window through which the terminal receives feedback information transmitted from the target uplink; The transmission period, transmission window, or transmission time length of the first downlink information.

6. The method according to any one of claims 1 to 5, wherein, Before the terminal receives the first downlink information, the method further includes: the terminal determining the resources or configuration of the first downlink information based on at least one of the following: Indication or configuration of the SIB of the target cell; The indication of the second downlink information; Predefined information; The indication of the target uplink transmission; The indication of the feedback information transmitted uplink from the target; Dedicated RRC signaling, downlink control information (DCI), media access control unit (MAC) CE, RRC recovery signaling, or RRC release signaling indication; Paging message or paging DCI instruction; System information notification instructions; System message update indication; The frequency band, carrier, subband, BWP, frequency range, or synchronization grid in which the first downlink information is located; The frequency band, carrier, subband, BWP, frequency range, or synchronization grid in which the second downlink information is located.

7. The method according to any one of claims 1 to 6, wherein, The first downlink information is characterized by at least one of the following: It is a subset of the total set of candidate SSB beams; Not on the synchronization grid; Located on a dedicated synchronization grid; The period of the first downlink information is the same as the period of the second downlink information; The frequency of the first downlink information is the same as the frequency of the second downlink information or is located on the same synchronization grid. The time-domain resources of the first downlink information overlap with or are time-division multiplexed (TDM) with the time-domain resources of the second downlink information. The frequency domain resources of the first downlink information overlap with or are frequency division multiplexed (FDM) with the frequency domain resources of the second downlink information. The specific information element IE in the master information block (MIB) indicated by the first downlink information has a specific value; The first downlink information is associated with the second downlink information; The first downlink information and the second downlink information belong to different reference signal identifier groups, different TRP groups, or different carrier groups; The first downlink information and the second downlink information have different structures; The first downlink information and the second downlink information share the candidate's time domain position or frequency domain position.

8. The method according to any one of claims 1 to 7, wherein, After the terminal receives the first downlink information, the method further includes: the terminal determining, based on at least one of the following, that it is capable of performing random access or initiating a connection establishment request based on the first downlink information: The first downlink information is located at a specific frequency position or on a synchronization grid; The level or type of the first downlink information; The indication of the first downlink information; The first downlink information is associated with the Physical Random Access Channel (PRACH), mapped to the PRACH, and associated with the RACH timing or the WUS timing; The first downlink information is associated with an idle terminal; The first downlink information applies to idle terminals; The measured value of the first downlink information is not less than the fourth threshold; The measured value of the first downlink information is greater than the measured value of the second downlink information; The measured value of the first downlink information is greater than the measured value of the second downlink information and the difference is not less than the fifth threshold. The average of the measurements of multiple first downlink information is not less than the sixth threshold; The mean of the measurements of multiple first downlink information items within the target time period is greater than the mean of the measurements of multiple second downlink information items; Within the target time period, the mean of the measurements of multiple first downlink information is greater than the mean of the measurements of multiple second downlink information, and the difference is not less than the seventh threshold.

9. The method according to any one of claims 1 to 7, wherein, After the terminal receives the first downlink information, the method further includes: the terminal determining, based on at least one of the following, that the first downlink information is only used for measurement: The first downlink information is located at a specific frequency position or on a synchronization grid; The level or type of the first downlink information; The indication of the first downlink information; The first downlink information is not associated with the Physical Random Access Channel (PRACH), is not mapped to PRACH, is not associated with RACH timing, or is not associated with WUS timing; The first downlink information is associated with the connected terminal; The first downlink information does not apply to idle terminals; The measured value of the first downlink information is not less than the fourth threshold; The measured value of the first downlink information is greater than the measured value of the second downlink information; The measured value of the first downlink information is greater than the measured value of the second downlink information and the difference is not less than the fifth threshold. The average of the measurements of multiple first downlink information is not less than the sixth threshold; The mean of the measurements of multiple first downlink information items within the target time period is greater than the mean of the measurements of multiple second downlink information items; Within the target time period, the mean of the measurements of multiple first downlink information is greater than the mean of the measurements of multiple second downlink information, and the difference is not less than the seventh threshold.

10. The method according to any one of claims 1 to 9, wherein, If the terminal determines that it cannot perform random access or initiate a connection establishment request based on the first downlink information, or determines that the first downlink information cannot be used for measurement, the method further includes: Based on the first downlink information, the feedback information of the target uplink transmission, or the resources or configuration of the first downlink information, determine the resource location of the reference signal that allows random access.

11. The method according to any one of claims 1 to 10, wherein, The method further includes: the terminal determining, based on at least one of the following, that the first downlink information is in a sending state, in an active state, or has been triggered: A DCI scrambled with a specific RNTI is found in a specific search space, and the DCI is used to schedule the feedback information of the target uplink transmission; The feedback information of the DCI scheduling with specific RNTI scrambling found contains the preamble identifier corresponding to the target uplink transmission. The first downlink information was blindly detected at the possible transmission location of the first downlink information. The network-side device indicates that the first downlink information is in the sending state, in the active state, or has been triggered.

12. The method according to any one of claims 1 to 11, wherein, After the terminal sends the target uplink transmission, the method further includes: the terminal receiving feedback information of the target uplink transmission, wherein the feedback information of the target uplink transmission is used to indicate at least one of the following: The preamble identifier corresponding to the target uplink transmission; The reference signal beam identifier or beam group identifier corresponding to the first downlink information; The transmission period of the first downlink information; The number of cycles of the first downlink information transmission; The number of clusters in the first downlink information transmission; The duration of the target receiving window, which is the window through which the terminal receives feedback information transmitted uplink from the target.

13. The method according to any one of claims 1 to 12, wherein, The feedback information transmitted uplink to the target includes at least one of the following: WUS response, paging message, or random access response (RAR).

14. The method according to any one of claims 1 to 13, wherein, The target uplink transmission includes at least one of the following: PRACH; Uplink low-power wake-up signal; Wake-up signal; A signal specifically used to trigger or request the first downlink information; Detection Reference Signal (SRS); Scheduling Request (SR); Configure and schedule the physical uplink shared channel (CG PUSCH); Random access message 3 or random access message A.

15. The method according to any one of claims 1 to 14, wherein, The method further includes: when the first downlink information and the second downlink information overlap, the terminal performs one of the following: Only the first downlink information is received; Only the second downlink information will be received; Only the earlier of the first downlink information and the second downlink information in the time domain is received; Only the one containing the PBCH load in the first downlink information and the second downlink information is received.

16. A method for transmitting downlink information, comprising: The network-side device receives a target uplink transmission, which is used to request the transmission of first downlink information. The network-side device sends the first downlink information; The possible transmission location of the first downlink information is determined by at least one of the following: protocol predefined, network-side device indication, feedback information indication of the target uplink transmission, or second downlink information indication, wherein the second downlink information is transmitted periodically; The first downlink information or the second downlink information includes at least one of the following, or the first downlink information or the second downlink information includes a control channel / search space that schedules at least one of the following: SSB, PSS, SSS, PBCH, DMRS, TRS, CSI-RS, location signal, at least a portion of SIB and at least a portion of OSI.

17. The method according to claim 16, wherein, The method further includes: the network-side device indicating the resources or configuration of the first downlink information to the terminal, wherein the resources or configuration of the first downlink information are used to indicate at least one of the following: The type or characteristics of the terminal that is allowed to measure the first downlink information; The reference signal identifier or reference signal group identifier corresponding to the first downlink information; The content contained in the first downlink information; Repeated transmission of the first downlink information; The transmission power of the first downlink information; The RRC status of the terminal associated with the first downlink information; The transmission period of the first downlink information; The number of cycles of the first downlink information transmission; The number of clusters in the first downlink information transmission; QCL information of the first downlink information; Different parts of the first downlink information are respectively associated with QCL information, beam, reference signal or channel resources; The different repeated transmissions of the first downlink information are respectively associated with QCL information, beam, reference signal or channel resources; Whether the first downlink information and the second downlink information belong to the same BWP; The synchronous grid search step size of the first downlink information; Whether the first downlink information is located on the synchronization grid; The transmission frequency of the first downlink information; The time-frequency resource configuration of the first downlink information; Public RNTI; Search space; Whether the first downlink information is allowed to be requested by the terminal.

18. The method according to claim 16 or 17, wherein, The first downlink information is characterized by at least one of the following: It is a subset of the total set of candidate SSB beams; Not on the synchronization grid; Located on a dedicated synchronization grid; The period of the first downlink information is the same as the period of the second downlink information; The frequency of the first downlink information is the same as the frequency of the second downlink information or is located on the same synchronization grid. The time-domain resources of the first downlink information overlap with the time-domain resources of the second downlink information or are TDM; The frequency domain resources of the first downlink information overlap with or are FDM-based with the frequency domain resources of the second downlink information. The specific IE in the MIB indicated by the first downlink information is a specific value; The first downlink information is associated with the second downlink information; The first downlink information and the second downlink information belong to different reference signal identifier groups, different TRP groups, or different carrier groups; The first downlink information and the second downlink information have different structures; The first downlink information and the second downlink information share the candidate's time domain position or frequency domain position.

19. The method according to any one of claims 16 to 18, wherein, After the network-side device receives the target uplink transmission, the method further includes: the network-side device sending feedback information of the target uplink transmission, wherein the feedback information of the target uplink transmission is used to indicate at least one of the following: The preamble identifier corresponding to the target uplink transmission; The reference signal beam identifier or beam group identifier corresponding to the first downlink information; The transmission period of the first downlink information; The number of cycles of the first downlink information transmission; The number of clusters in the first downlink information transmission; The duration of the target receiving window, which is the window through which the terminal receives feedback information transmitted uplink from the target.

20. A downlink information receiving device, applied to a terminal, comprising: The sending module is used to send a target uplink transmission, which is used to request the sending of first downlink information; The receiving module is used to receive the first downlink information; The possible transmission location of the first downlink information is determined by at least one of the following: protocol predefined, network-side device indication, feedback information indication of the target uplink transmission, or second downlink information indication, wherein the second downlink information is transmitted periodically; The first downlink information or the second downlink information includes at least one of the following, or the first downlink information or the second downlink information includes a control channel / search space that schedules at least one of the following: SSB, PSS, SSS, PBCH, DMRS, TRS, CSI-RS, location signal, at least a portion of SIB and at least a portion of OSI.

21. The apparatus according to claim 20, wherein, The sending module is configured to send the target uplink transmission when a first condition is met, wherein the first condition includes at least one of the following: The first downlink information was not received; BF occurred; RLF occurred; The conditions for selecting a residential community must be met; The conditions for community re-election are met; Receive N consecutive OOS indications, where N is an integer greater than 1; Timer T310 is running; The following reselection or handover conditions must be met: cell, TRP, carrier, frequency band, subband, and reference signal group; The measured value of the reference signal is not greater than the first threshold. There is a service to be transmitted; There is urgent business to be transmitted or the business priority reaches a specific level; Uplink or downlink data packets have arrived; The time interval since the last uplink transmission of the target is not less than a first duration; The second downlink information decoding failed; Multiple second downlink information decoding failures reached or exceeded the first number; The number of failed attempts to access the target cell has reached or exceeded the second count; The number of failed attempts to access the target cell after using a specific transmission power reaches or exceeds the second count; The timing advance TA for sending the target uplink transmission is effective; The number of times the target uplink transmission is sent is no greater than the third time; The target uplink transmission is a retransmission, and the time interval between the last transmission of the target uplink transmission and the last transmission is not less than the second duration; The first downlink information can be sent upon request by the terminal; The measured value of the first downlink information that has already been transmitted is not greater than the second threshold; The measured value of some of the transmitted first downlink information is less than the measured value of the second downlink information; The measured value of some of the transmitted first downlink information is less than the measured value of the second downlink information and the difference is not less than the third threshold.

22. The apparatus according to claim 20 or 21, wherein, The receiving module is configured to receive the first downlink information based on resources or configuration of the first downlink information, wherein the resources or configuration of the first downlink information are configured to indicate at least one of the following: The type or characteristics of the terminal that is allowed to measure the first downlink information; The reference signal identifier or reference signal group identifier corresponding to the first downlink information; The content contained in the first downlink information; Repeated transmission of the first downlink information; The transmission power of the first downlink information; The RRC status of the terminal associated with the first downlink information; The transmission period of the first downlink information; The number of cycles of the first downlink information transmission; The number of clusters in the first downlink information transmission; QCL information of the first downlink information; Different parts of the first downlink information are respectively associated with QCL information, beam, reference signal or channel resources; The different repeated transmissions of the first downlink information are respectively associated with QCL information, beam, reference signal or channel resources; Whether the first downlink information and the second downlink information belong to the same BWP; The synchronous grid search step size of the first downlink information; Whether the first downlink information is located on the synchronization grid; The transmission frequency of the first downlink information; The time-frequency resource configuration of the first downlink information; Public RNTI; Search space; Whether the first downlink information is allowed to be requested by the terminal.

23. The apparatus according to any one of claims 20 to 22, wherein, The device further includes a first processing module, configured to determine the resources or configuration of the first downlink information based on at least one of the following: Indication or configuration of the SIB of the target cell; The indication of the second downlink information; Predefined information; The indication of the target uplink transmission; The indication of the feedback information transmitted uplink from the target; Dedicated RRC signaling, DCI, MAC CE, RRC recovery signaling, or RRC release signaling indication; Paging message or paging DCI instruction; System information notification instructions; System message update indication; The frequency band, carrier, subband, BWP, frequency range, or synchronization grid in which the first downlink information is located; The frequency band, carrier, subband, BWP, frequency range, or synchronization grid in which the second downlink information is located.

24. The apparatus according to any one of claims 20 to 23, wherein, The device further includes a second processing module, configured to determine, based on at least one of the following, whether random access or a connection establishment request can be initiated based on the first downlink information: The first downlink information is located at a specific frequency position or on a synchronization grid; The level or type of the first downlink information; The indication of the first downlink information; The first downlink information is associated with PRACH, mapped to PRACH, associated with RACH timing, or associated with WUS timing; The first downlink information is associated with an idle terminal; The first downlink information applies to idle terminals; The measured value of the first downlink information is not less than the fourth threshold; The measured value of the first downlink information is greater than the measured value of the second downlink information; The measured value of the first downlink information is greater than the measured value of the second downlink information and the difference is not less than the fifth threshold. The average of the measurements of multiple first downlink information is not less than the sixth threshold; The mean of the measurements of multiple first downlink information items within the target time period is greater than the mean of the measurements of multiple second downlink information items; Within the target time period, the mean of the measurements of multiple first downlink information is greater than the mean of the measurements of multiple second downlink information, and the difference is not less than the seventh threshold.

25. The apparatus according to any one of claims 20 to 23, wherein, The device further includes a third processing module for determining, based on at least one of the following, that the first downlink information is used only for measurement: The first downlink information is located at a specific frequency position or on a synchronization grid; The level or type of the first downlink information; The indication of the first downlink information; The first downlink information is not associated with PRACH, is not mapped to PRACH, is not associated with RACH timing, or is not associated with WUS timing; The first downlink information is associated with the connected terminal; The first downlink information does not apply to idle terminals; The measured value of the first downlink information is not less than the fourth threshold; The measured value of the first downlink information is greater than the measured value of the second downlink information; The measured value of the first downlink information is greater than the measured value of the second downlink information and the difference is not less than the fifth threshold. The average of the measurements of multiple first downlink information is not less than the sixth threshold; The mean of the measurements of multiple first downlink information items within the target time period is greater than the mean of the measurements of multiple second downlink information items; Within the target time period, the mean of the measurements of multiple first downlink information is greater than the mean of the measurements of multiple second downlink information, and the difference is not less than the seventh threshold.

26. The apparatus according to any one of claims 20 to 25, wherein, The device further includes a fourth processing module, configured to determine the resource location of a reference signal that allows random access when it is determined that random access and connection establishment requests cannot be initiated based on the first downlink information, or that the first downlink information cannot be used for measurement, based on the first downlink information, the feedback information of the target uplink transmission, or the resources or configuration of the first downlink information.

27. The apparatus according to any one of claims 20 to 26, wherein, The device further includes a fifth processing module, configured to determine, based on at least one of the following, that the first downlink information is in a transmission state, in an active state, or has been triggered: A DCI scrambled with a specific RNTI is found in a specific search space, and the DCI is used to schedule the feedback information of the target uplink transmission; The feedback information of the DCI scheduling with specific RNTI scrambling found contains the preamble identifier corresponding to the target uplink transmission. The first downlink information was blindly detected at the possible transmission location of the first downlink information. The network-side device indicates that the first downlink information is in the sending state, in the active state, or has been triggered.

28. The apparatus according to any one of claims 20 to 27, wherein, The receiving module is further configured to receive feedback information from the target uplink transmission, wherein the feedback information from the target uplink transmission is used to indicate at least one of the following: The preamble identifier corresponding to the target uplink transmission; The reference signal beam identifier or beam group identifier corresponding to the first downlink information; The transmission period of the first downlink information; The number of cycles of the first downlink information transmission; The number of clusters in the first downlink information transmission; The duration of the target receiving window, which is the window through which the terminal receives feedback information transmitted uplink from the target.

29. The apparatus according to any one of claims 20 to 28, wherein, The receiving module is further configured to perform one of the following actions when the first downlink information and the second downlink information overlap: Only the first downlink information is received; Only the second downlink information will be received; Only the earlier of the first downlink information and the second downlink information in the time domain is received; Only the one containing the PBCH load in the first downlink information and the second downlink information is received.

30. A downlink information transmitting apparatus, applied to network-side equipment, comprising: The receiving module is used to receive the target uplink transmission, which is used to request the transmission of the first downlink information; The sending module is used to send the first downlink information; The possible transmission location of the first downlink information is determined by at least one of the following: protocol predefined, network-side device indication, feedback information indication of the target uplink transmission, or second downlink information indication, wherein the second downlink information is transmitted periodically; The first downlink information or the second downlink information includes at least one of the following, or the first downlink information or the second downlink information includes a control channel / search space that schedules at least one of the following: SSB, PSS, SSS, PBCH, DMRS, TRS, CSI-RS, location signal, at least a portion of SIB and at least a portion of OSI.

31. The apparatus according to claim 30, wherein, The sending module is further configured to indicate to the terminal the resources or configuration of the first downlink information, wherein the resources or configuration of the first downlink information are used to indicate at least one of the following: The type or characteristics of the terminal that is allowed to measure the first downlink information; The reference signal identifier or reference signal group identifier corresponding to the first downlink information; The content contained in the first downlink information; Repeated transmission of the first downlink information; The transmission power of the first downlink information; The RRC status of the terminal associated with the first downlink information; The transmission period of the first downlink information; The number of cycles of the first downlink information transmission; The number of clusters in the first downlink information transmission; QCL information of the first downlink information; Different parts of the first downlink information are respectively associated with QCL information, beam, reference signal or channel resources; The different repeated transmissions of the first downlink information are respectively associated with QCL information, beam, reference signal or channel resources; Whether the first downlink information and the second downlink information belong to the same BWP; The synchronous grid search step size of the first downlink information; Whether the first downlink information is located on the synchronization grid; The transmission frequency of the first downlink information; The time-frequency resource configuration of the first downlink information; Public RNTI; Search space; Whether the first downlink information is allowed to be requested by the terminal.

32. The apparatus according to claim 30 or 31, wherein, The first downlink information is characterized by at least one of the following: It is a subset of the total set of candidate SSB beams; Not on the synchronization grid; Located on a dedicated synchronization grid; The period of the first downlink information is the same as the period of the second downlink information; The frequency of the first downlink information is the same as the frequency of the second downlink information or is located on the same synchronization grid. The time-domain resources of the first downlink information overlap with the time-domain resources of the second downlink information or are TDM; The frequency domain resources of the first downlink information overlap with or are FDM-based with the frequency domain resources of the second downlink information. The specific IE in the MIB indicated by the first downlink information is a specific value; The first downlink information is associated with the second downlink information; The first downlink information and the second downlink information belong to different reference signal identifier groups, different TRP groups, or different carrier groups; The first downlink information and the second downlink information have different structures; The first downlink information and the second downlink information share the candidate's time domain position or frequency domain position.

33. The apparatus according to any one of claims 30 to 32, wherein, The sending module is further configured to send feedback information of the target uplink transmission, the feedback information of the target uplink transmission being used to indicate at least one of the following: The preamble identifier corresponding to the target uplink transmission; The reference signal beam identifier or beam group identifier corresponding to the first downlink information; The transmission period of the first downlink information; The number of cycles of the first downlink information transmission; The number of clusters in the first downlink information transmission; The duration of the target receiving window, which is the window through which the terminal receives feedback information transmitted uplink from the target.

34. A terminal comprising a processor and a memory, the memory storing a program or instructions executable on the processor, the program or instructions, when executed by the processor, implementing the steps of the method as claimed in any one of claims 1 to 15.

35. A network-side device, comprising a processor and a memory, the memory storing a program or instructions executable on the processor, the program or instructions, when executed by the processor, implementing the steps of the method as claimed in any one of claims 16 to 19.

36. A readable storage medium storing a program or instructions that, when executed by a processor, implement the steps of the method as claimed in any one of claims 1 to 15, or implement the steps of the method as claimed in any one of claims 16 to 19.

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