Method and apparatus for determining cyclic prefix (CP) parameter, and communication device

Abstract

The present application belongs to the technical field of communications. Disclosed are a method and apparatus for determining a cyclic prefix (CP) parameter, and a communication device. The method for determining a CP parameter in the embodiments of the present application comprises: on the basis of first information, a communication device determining a CP parameter corresponding to a target object, wherein the CP length of the target object is related to the CP parameter, and the first information comprises at least one of a transmission mode of the target object, a transmission parameter of the target object, related information of a reference object, target information and a preset association relationship; and the communication device transmitting the target object on the basis of the CP length of the target object. The target object comprises at least one of SI, an SIB, a downlink control channel for scheduling the SI or the SIB, and a downlink shared channel for bearing the SI or the SIB; the target information comprises information used for indicating the target object or information used for requesting the target object; and the preset association relationship comprises an association relationship between each of at least one object and a CP parameter.

Description

Method, device and communication equipment for determining cyclic prefix CP parameters

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Chinese Patent Application No. 202410199097.7 filed on February 22, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0003] The present application belongs to the field of communication technology, and specifically relates to a method, apparatus and communication equipment for determining a cyclic prefix (CP) parameter. Background Art

[0004] To eliminate possible interference between adjacent orthogonal frequency division multiplex (OFDM) symbols, an OFDM symbol typically consists of two parts: a cyclic prefix (CP) and a time-domain signal obtained after an inverse fast Fourier transform (IFFT). In related technologies, communication devices typically default to the normal CP (NCP) as the CP parameter for various objects (such as system information and downlink channels). This suggests that the CP parameter determination method used in related technologies lacks flexibility. Summary of the Invention

[0005] The embodiments of the present application provide a method, apparatus, and communication device for determining a cyclic prefix (CP) parameter, which can solve the problem of lack of flexibility in the CP parameter determination method in related technologies.

[0006] In a first aspect, a method for determining a cyclic prefix (CP) parameter is provided, the method comprising:

[0007] The communication device determines, based on first information, a CP parameter corresponding to a target object, where a CP length of the target object is related to the CP parameter, the first information including at least one of: a transmission mode of the target object, a transmission parameter of the target object, relevant information of a reference object, target information, and a preset association relationship;

[0008] The communication device transmits the target object according to the CP length of the target object;

[0009] The target object includes at least one of system information SI, system information block SIB, a downlink control channel for scheduling SI or SIB, and a downlink shared channel for carrying SI or SIB;

[0010] The reference object includes at least one of SI, SIB, synchronization signal block SSB, broadcast signal, downlink control channel, and downlink shared channel transmitted before the target object;

[0011] The target information includes information for indicating the target object, or the target information includes information for requesting the target object;

[0012] The preset association relationship includes an association relationship between each object of at least one object and a CP parameter, and the at least one object includes at least one of the target object and the reference object.

[0013] In a second aspect, a cyclic prefix (CP) parameter determination device is provided, the device comprising:

[0014] a first processing unit, configured to determine a CP parameter corresponding to a target object based on first information, where a CP length of the target object is related to the CP parameter, the first information including at least one of: a transmission mode of the target object, a transmission parameter of the target object, relevant information of a reference object, target information, and a preset association relationship;

[0015] a second processing unit, configured to transmit the target object according to the CP length of the target object;

[0016] The target object includes at least one of system information SI, system information block SIB, a downlink control channel for scheduling SI or SIB, and a downlink shared channel for carrying SI or SIB;

[0017] The reference object includes at least one of SI, SIB, synchronization signal block SSB, broadcast signal, downlink control channel, and downlink shared channel transmitted before the target object;

[0018] The target information includes information for indicating the target object, or the target information includes information for requesting the target object;

[0019] The preset association relationship includes an association relationship between each object of at least one object and a CP parameter, and the at least one object includes at least one of the target object and the reference object.

[0020] In a third aspect, a terminal is provided, comprising a processor and a memory, wherein the memory stores a program or instruction that can be run on the processor, and when the program or instruction is executed by the processor, the steps of the method described in the first aspect are implemented.

[0021] In a fourth aspect, a terminal is provided, including a processor and a communication interface, wherein the processor is configured to: determine, based on first information, a CP parameter corresponding to a target object, where the CP length of the target object is related to the CP parameter, the first information including: a transmission mode of the target object, a transmission parameter of the target object, relevant information of a reference object, target information, and at least one of a preset association relationship; and the communication device transmits the target object according to the CP length of the target object;

[0022] The target object includes at least one of system information SI, system information block SIB, a downlink control channel for scheduling SI or SIB, and a downlink shared channel for carrying SI or SIB;

[0023] The reference object includes at least one of SI, SIB, synchronization signal block SSB, broadcast signal, downlink control channel, and downlink shared channel transmitted before the target object;

[0024] The target information includes information for indicating the target object, or the target information includes information for requesting the target object;

[0025] The preset association relationship includes an association relationship between each object of at least one object and a CP parameter, and the at least one object includes at least one of the target object and the reference object.

[0026] In a fifth aspect, a network side device is provided, which includes a processor and a memory, wherein the memory stores programs or instructions that can be run on the processor, and when the program or instructions are executed by the processor, the steps of the method described in the first aspect are implemented.

[0027] In a sixth aspect, a network-side device is provided, including a processor and a communication interface, wherein the processor is configured to:

[0028] determining, based on first information, a CP parameter corresponding to a target object, where a CP length of the target object is related to the CP parameter, the first information including: a transmission mode of the target object, a transmission parameter of the target object, relevant information of a reference object, target information, and at least one of a preset association relationship; and transmitting, by the communication device, the target object according to the CP length of the target object;

[0029] The target object includes at least one of system information SI, system information block SIB, a downlink control channel for scheduling SI or SIB, and a downlink shared channel for carrying SI or SIB;

[0030] The reference object includes at least one of SI, SIB, synchronization signal block SSB, broadcast signal, downlink control channel, and downlink shared channel transmitted before the target object;

[0031] The target information includes information for indicating the target object, or the target information includes information for requesting the target object;

[0032] The preset association relationship includes an association relationship between each object of at least one object and a CP parameter, and the at least one object includes at least one of the target object and the reference object.

[0033] In a seventh aspect, a readable storage medium is provided, on which a program or instruction is stored. When the program or instruction is executed by a processor, the steps of the method described in the first aspect are implemented.

[0034] In an eighth aspect, a wireless communication system is provided, comprising: a terminal and a network side device, wherein the terminal can be used to execute the steps of the method described in the first aspect, and the network side device can be used to execute the steps of the method described in the first aspect.

[0035] In a ninth aspect, a chip is provided, comprising a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is configured to run a program or instruction to implement the method described in the first aspect.

[0036] In the tenth aspect, a computer program / program product is provided, which is stored in a storage medium and executed by at least one processor to implement the steps of the cyclic prefix CP parameter determination method as described in the first aspect.

[0037] In an embodiment of the present application, a communication device determines the CP parameters corresponding to a target object based on first information, wherein the CP length of the target object is related to the CP parameters, and the first information includes: at least one of the transmission mode of the target object, the transmission parameters of the target object, relevant information of a reference object, target information, and a preset association relationship; the communication device transmits the target object according to the CP length of the target object. In this way, the communication device can more flexibly determine the CP parameters corresponding to the target object based on the first information, thereby improving the flexibility of the CP parameter determination method. Based on this, the embodiment of the present application can support diverse CP parameters, which are conducive to resisting inter-symbol interference caused by delay spread. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] FIG1 is a schematic diagram of a network structure applicable to an embodiment of the present application;

[0039] FIG2 is a schematic diagram of the structure of an OFDM symbol;

[0040] FIG3 is a flow chart of a method for determining CP parameters provided in an embodiment of the present application;

[0041] FIG4 is a structural diagram of a CP parameter determination device provided in an embodiment of the present application;

[0042] FIG5 is a structural diagram of a communication device provided in an embodiment of the present application;

[0043] FIG6 is a structural diagram of a terminal provided in an embodiment of the present application;

[0044] FIG7 is a structural diagram of a network-side device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0045] The following will be combined with the accompanying drawings in the embodiments of this application to clearly describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of this application.

[0046] The terms "first", "second", etc. in this application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the terms used in this way are interchangeable where appropriate, so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first" and "second" are generally of the same type, and do not limit the number of objects, for example, the first object can be one or more. In addition, "or" in this application represents at least one of the connected objects. For example, "A or B" covers three options, namely, Option 1: including A but not including B; Option 2: including B but not including A; Option 3: including both A and B. The character " / " generally indicates that the objects associated before and after are in an "or" relationship.

[0047] The term "indication" in this application can be either a direct indication (or explicit indication) or an indirect indication (or implicit indication). A direct indication can be understood as the sender explicitly informing the receiver of specific information, the operation to be performed, or the requested result, etc. in the instruction sent; an indirect indication 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 operation to be performed or the requested result, etc. based on the judgment result.

[0048] It is worth noting that the technology described in the embodiments of the present application is not limited to the Long Term Evolution (LTE) / LTE-Advanced (LTE-A) system, but can also be used in other wireless communication systems, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single-carrier Frequency-Division Multiple Access (SC-FDMA) or other systems. The terms "system" and "network" in the embodiments of the present application are often used interchangeably, and the technology described can be used for the systems and radio technologies mentioned above, as well as for other systems and radio technologies. The following description describes a New Radio (NR) system for illustrative purposes, and NR terminology is used in most of the following description, but these technologies can also be applied to systems other than NR systems, such as 6th generation (6G) systems. th Generation, 6G) communication system.

[0049] FIG1 is a block diagram of a wireless communication system applicable to an embodiment of the present application. The wireless communication system includes a terminal 11 and a network-side device 12. The terminal 11 may be a mobile phone, a tablet computer (Tablet Personal Computer), a laptop computer (Laptop Computer), a notebook computer, a personal digital assistant (PDA), a handheld computer, a netbook, an ultra-mobile personal computer (UMPC), a mobile internet device (MID), an augmented reality (AR), a virtual reality (VR) device, a robot, a wearable device (Wearable Device), an aircraft (Flight Vehicle), a vehicle-mounted device (VUE), a ship-mounted device, a pedestrian user equipment (PUE), a smart home (home appliances with wireless communication capabilities, such as refrigerators, televisions, washing machines, or furniture), a game console, a personal computer (PC), an ATM, or a self-service machine, or other terminal-side devices. Wearable devices include: smart watches, smart bracelets, smart headphones, smart glasses, smart jewelry (smart bracelets, smart bracelets, smart rings, smart necklaces, smart anklets, smart anklets, etc.), smart wristbands, smart clothing, etc. Among them, the vehicle-mounted device can also be called a vehicle-mounted terminal, a vehicle-mounted controller, a vehicle-mounted module, a vehicle-mounted component, a vehicle-mounted chip or a vehicle-mounted unit, etc. It should be noted that the specific type of the terminal 11 is not limited in the embodiment of the present application. The network side device 12 may include an access network device, wherein the access network device may also be called a radio access network (Radio Access Network, RAN) device, a radio access network function or a radio access network unit. The access network device may include a base station, a wireless local area network (WLAN) access point (AP) or a wireless fidelity (WiFi) node, etc.Among them, the base station can be referred to as Node B (NB), Evolved Node B (eNB), the 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 (home evolved Node B), Transmission Reception Point (TRP) or other appropriate terms in the relevant field. As long as the same technical effect is achieved, the base station is not limited to specific technical vocabulary. It should be noted that in the embodiment of the present application, only the base station in the NR system is used as an example for introduction, and the specific type of the base station is not limited.

[0050] Before describing the embodiments of the present application, the following briefly introduces the relevant technologies:

[0051] 1. System Information (SI) in 5G NR Technology

[0052] 5G NR system information includes the Master Information Block (MIB) and a series of System Information Blocks (SIBs). Based on the content contained in the system information, it can be divided into Minimum System Information (SI) and Other SI (OSI), where:

[0053] Minimum SI contains basic information for initial access and obtaining other system information. Minimum SI mainly includes MIB and SIB1.

[0054] The MIB contains cell barring status information and physical layer information necessary to obtain further system information, such as the configuration of Control Resource Set (CORESET) # 0. The MIB is carried on the Broadcast Channel (BCH) and broadcast periodically.

[0055] The SIB1 message defines scheduling information for other system information blocks and contains information required for initial access. SIB1, also known as Remaining Minimum System Information (RMSI), is carried on the Downlink Shared Channel (DL-SCH) and can be broadcast periodically or sent to user equipment (UE) on the DL-SCH in a dedicated manner when in the Radio Resource Control (RRC) connected (RRC_CONNECTED) state.

[0056] Other SI covers all system messages not broadcast in Minimum SI, including SIB2 to SIB9 (denoted as SIBx). These SIBx can be sent in the following ways:

[0057] Periodically broadcast on DL-SCH;

[0058] A UE in the RRC idle (RRC_IDLE) state or the RRC inactive (RRC_INACTIVE) state requests a broadcast;

[0059] In the RRC_CONNECTED state, it is sent to the UE on the DL-SCH in a dedicated manner.

[0060] MIB information is transmitted through the BCH and the physical broadcast channel (PBCH), and SIBx information is transmitted through the DL-SCH and the physical downlink shared channel (PDSCH).

[0061] 2. Initial Access Process in 5G NR Technology

[0062] In 5G NR technology, the process of UE accessing the wireless bearer network is divided into two processes: initial access and random access.

[0063] The UE first searches for the synchronization signal block (SSB) to obtain the frequency and time of the access carrier, as well as the parameters required for access, to achieve downlink synchronization. The UE obtains information about the physical downlink control channel (PDCCH) that carries the scheduling SIB1 information through the MIB message in the SSB. It performs blind detection on the PDCCH to obtain information such as the time and frequency resources occupied by the PDSCH of SIB1, and then obtains the PDSCH where SIB1 is placed, and finally decodes SIB1. In 5G NR, SIB2 to SIB9 use an on-demand mechanism and can be triggered by the network or provided in a broadcast or dedicated manner based on the terminal's request.

[0064] After completing downlink synchronization and receiving system information, the UE can synchronize with the gNB's downlink timing and obtain network-side configuration parameters. Based on the association between the SSB and the RACH occasion (RO), the UE determines the RO resource set and preamble resource set associated with the SSB. The UE randomly selects an RO resource and a preamble resource from the resource set and sends Message 1 (Msg1) to initiate a random access procedure.

[0065] 3. SSB Structure in 5G NR Technology

[0066] In order for the UE to search for a reasonable cell and synchronize with the selected cell, the network side usually needs to broadcast a synchronization signal and provide certain master information about the cell. The UE obtains the required information through SSB. In 5G, SSB includes: Primary Synchronisation Signal (PSS), Secondary Synchronisation Signal (SSS), PBCH, PBCH Demodulation Reference Signal (DMRS). Among them, the main functions of PSS and SSS are to achieve symbol-level synchronization and complete the Physical Cell Identifier (PCI). PBCH contains the MIB of the cell and some SSB index (SSB-index) information (lower three bits).

[0067] 4. SIB1 and OSI in 5G NR Technology

[0068] SIB1 defines the scheduling information and initial access information of other system information blocks, and is the configuration information that the UE must obtain to continue subsequent behavior. MIB is the only prior information for obtaining SIB1. In NR, the 8-bit pdcch-ConfigSIB1 parameter in the MIB message indicates the configuration information related to CORESET 0. Among them, the upper 4 bits of pdcch-ConfigSIB1 indicate the number of resource blocks (RBs) and OFDM symbols occupied by CORESET 0, the multiplexing method of SSB and CORESET 0, and the frequency domain offset between the starting RB of CORESET 0 and the starting RB of SSB. The lower 4 bits of pdcch-ConfigSIB1 indicate the relevant parameter configuration of the Type 0 Common Search Space (CSS).

[0069] In NR, the PDCCH channel is also called CORESET. The PDCCH that carries the scheduling SIB1 information is CORESET 0, and the corresponding search space is Type 0 CSS. The time-frequency resources of CORESET 0 and the time-frequency resources of SSB can be multiplexed in the following three ways:

[0070] (1) Type 1: SSB and CORESET are multiplexed using time division multiplexing (TDM);

[0071] (2) Type 2: SSB and CORESET are multiplexed using TDM + Frequency Division Multiplexing (FDM);

[0072] (3) Type 3: SSB and CORESET are multiplexed in FDM mode.

[0073] The UE knows the possible address of the PDCCH that schedules SIB1. After blind detection, it can obtain the PDCCH, and then obtain the PDSCH where SIB1 is placed, and finally decode SIB1. Because SIB1 contains parameter thresholds for cell selection, unified access control parameters, common configuration parameters for the serving cell (Cell), and other SIBx scheduling parameters, the content of SIB1 is very important.

[0074] SIBx is not broadcast periodically by default in NR. If there is no periodic broadcast, the UE can use the On Demand mechanism to request system information, and the network side will configure it to be sent by broadcast or UE-dedicated signaling. The scheduling information of SIBx other than SIB1 is configured in the si-SchedulingInfo information element (IE) in SIB1. 5G supports combining multiple SIBx with the same period and status into one SchedulingInfo IE, and can independently configure si-BroadcastStatus{broadcasting,notBroadcasting} and si-Periodicity for each package. If the system information required by the UE is not broadcast in the cell, the UE is supported to request system information through Msg1 or Msg3. If the si-SchedulingInfo IE contains si-RequestConfig or si-RequestConfigSUL, the UE can trigger the underlying layer to initiate a random access process and request system information through Msg1. If the si-SchedulingInfo IE does not include si-RequestConfig and si-RequestConfigSUL, system information can be requested through Msg3.

[0075] 5. Obtain the time-frequency position of CORESET0 based on the MIB information in SSB

[0076] The UE demodulates the MIB and obtains the 8-bit Pdcch-ConfigSIB1 information.

[0077] 1) The controlResourceSetZero field in the upper 4 bits (MSB) of Pdcch-ConfigSIB1 is used to query the table (10 tables corresponding to CORESET0 in TS 38.213 (Tables 13-1 through 13-10)) to determine the time-frequency resource information for CORESET0. The specific table to use is further determined by the minimum channel bandwidth, SSB subcarrier spacing (SCS), and PDCCH SCS. For example, if SSB SCS = 30 kHz and PDCCH SCS = 30 kHz, the table corresponding to CORESET0 is Table 13-4. The controlResourceSetZero field is used to query the table to obtain the relevant CORESET0 parameters: CORESET type (Pattern), number of consecutive RBs, number of symbols, and RB offset (Offset).

[0078] 2) According to the relevant parameters of CORESET0, confirm the table that needs to be searched for the PDCCH monitoring opportunity (Table 13-11 to Table 13-14, for example, according to the CORESET0 parameters, determine that the table to be searched is Table 13-11). According to the known information SearchSpaceZero field, the corresponding table can be searched to obtain the required parameters: O, M, the number of search spaces in a time slot (Slot), and the first symbol index (First symbol index).

[0079] 6. Cyclic Prefix

[0080] In an OFDM system, an OFDM symbol typically consists of two parts: the CP, which is the first part, and the time-domain signal obtained after IFFT. The CP consists of the last Ncp sampling points of the second part, as shown in Figure 2.

[0081] Without a CP, intersymbol interference (ISI) may exist between adjacent OFDM symbols. For example, due to multipath delay, multiple sampling points at the end of the previous OFDM symbol overlap with multiple sampling points at the beginning of the second OFDM symbol. Or, due to timing error, the Fast Fourier Transform (FFT) time window at the receiving end includes the last multiple sampling points of the previous OFDM symbol and some sampling points of the current OFDM symbol. By adding a CP, and ensuring that the CP length is no less than the total delay (for example, including the delay caused by transmission delay and timing error), it is ensured that the FFT time window at the receiving end only includes the signal of the current OFDM symbol, and there is no ISI. It is not difficult to see that the length of the CP is related to the channel environment. For example, in an environment with a small propagation delay, a shorter CP is sufficient to eliminate ISI; in an environment with a large propagation delay, a longer CP is required to eliminate ISI. Therefore, the NR / LTE system supports two types of CPs: one is called NCP and the other is called Extended CP (ECP). CP can prevent inter-symbol interference (ISI), but because it cannot carry additional information, its overhead reduces resource efficiency. Specifically, the longer the CP, the lower the transmission efficiency of an OFDM symbol. With NCP, 14 OFDM symbols can be transmitted in a slot. With ECP, only 12 OFDM symbols can be transmitted in a slot. System design often requires a compromise between transmission efficiency and ISI.

[0082] The NR system can support different subcarrier spacings (SCS). For different SCSs, the ratio of the number of sampling points in the first part (i.e., the part occupied by the CP) and the number of sampling points in the second part of the OFDM symbol is the same, thereby ensuring the same transmission efficiency. For example, as shown in the formula in protocol TS 38.211 (i.e., the formula provided below), for any SCS, for a specific OFDM symbol, if the CP is NCP, the ratio of the number of sampling points in the first part to the number of sampling points in the second part is 144:2048. If the CP is ECP, the ratio of the number of sampling points in the first part to the number of sampling points in the second part is 512:2048. It can be seen that since the ratio of the number of sampling points in the first part to the number of sampling points in the second part does not change with the SCS, the time length of the first part decreases as the SCS increases.

[0083] In the NR system, after evaluation, although the CP length becomes shorter as the SCS increases, in the frequency range 1 (FR1) scenario, when SCS = 15 kHz and SCS = 30 kHz, the length of the NCP is sufficient to reduce inter-symbol interference, but when SCS = 60 kHz, the length of the NCP is insufficient under some channel conditions. Therefore, in the scenario of SCS = 60 kHz, NCP and ECP can be supported. In FR2 and FR2-2 scenarios, due to the smaller coverage area, the use of analog beams significantly shortens the multipath delay compared to FR1. Therefore, although the CP length becomes shorter as the SCS increases, the length of the NCP is still sufficient.

[0084] Furthermore, for NR / LTE systems, the time and frequency domain offsets of the UE or base station caused by hardware must meet specific requirements. For example, the UE must meet a carrier frequency offset (CFO) of no more than 0.1ppm, and the UE must periodically correct the time and frequency offset based on synchronization signals. Therefore, the length of the CP required to mitigate timing errors is essentially negligible.

[0085] In the NR system of the related technology, the CP parameters of the system information-related signals are all set to NCP by default, which can reduce the complexity and signaling overhead of the UE's initial access, but this CP parameter determination method lacks flexibility.

[0086] In addition, new scenarios or requirements may emerge in future communication systems, such as cells with longer propagation delays in non-terrestrial networks (NTN), larger SCSs in FR3, larger cells in cell-free networks, terminals with relaxed time and frequency accuracy requirements, and ultra-high-speed mobile terminals. NCP cannot meet the requirements in these scenarios.

[0087] In order to support different scenarios and meet different needs, during initial access, the network side needs to introduce different CP types for the downlink broadcast synchronization signal to resist the inter-symbol interference caused by different sizes of delay spread. At the same time, it also avoids using too long CP to avoid excessive resource overhead. For example, different SSB indexes support different CP lengths to support beams of different coverage sizes. During the initial access phase, the CP types of other system information-related signals also need to match system requirements to avoid resource waste or inter-symbol interference caused by too short CP. For on-demand system information, system information for cell switching, and system information for neighboring cells or secondary cells (Scell), the CP of system information-related signals also needs to be expanded to support different scenarios and meet different needs.

[0088] This requires terminals and network-side devices to be able to flexibly determine the CP parameters of various system information-related signals to support different scenarios and meet different needs.

[0089] In view of this, embodiments of the present application provide a cyclic prefix CP parameter determination method, a cyclic prefix CP parameter determination apparatus, and a communication device to solve the problem of lack of flexibility in the CP parameter determination method in related technologies.

[0090] The following describes in detail the CP parameter determination method provided in the embodiments of the present application through some embodiments and their application scenarios in conjunction with the accompanying drawings.

[0091] FIG3 shows a flow chart of a method for determining CP parameters provided by an embodiment of the present application. As shown in FIG3 , the method for determining CP parameters includes the following steps:

[0092] Step 301: The communication device determines, based on first information, a CP parameter corresponding to a target object, where the CP length of the target object is related to the CP parameter, and the first information includes at least one of: a transmission mode of the target object, transmission parameters of the target object, relevant information of a reference object, target information, and a preset association relationship;

[0093] Step 302: The communication device transmits the target object according to the CP length of the target object.

[0094] Among them, the target object includes at least one of SI, SIB, a downlink control channel for scheduling SI or SIB, and a downlink shared channel for carrying SI or SIB. That is to say, the type of the target object can be at least one of SI, SIB, a downlink control channel for scheduling SI or SIB, and a downlink shared channel for carrying SI or SIB. The target object can be understood as SI / SIB other than MIB (or SI / SIB-related signals, such as channels containing SI / SIB scheduling information, channels carrying SI / SIB, etc.). For ease of understanding, "target object" can be replaced by "system information-related signals". The "system information-related signals" here are a general term, which can include system information itself and system information blocks, downlink control channels, downlink shared channels or CORESETs related to system information.

[0095] Exemplarily, the target object may include at least one of the following: PDCCH containing SIB1 scheduling information, SIB1, PDCCH containing OSI (or SIBx) scheduling information, OSI (or SIBx), PDSCH containing SIB1, PDSCH containing OSI (or SIBx).

[0096] It should be noted that the above-mentioned MIB can be understood as the system information contained in the synchronization signal (or SSB), the signal (or system information) used for synchronization contained in the synchronization signal (or SSB), and the above-mentioned MIB can be replaced by expressions such as synchronization signal, broadcast signal, broadcast channel or other system message downlink broadcast channel.

[0097] The reference object includes at least one of the SI, SIB, SSB, broadcast signal, downlink control channel, and downlink shared channel transmitted before the target object. In an embodiment of the present application, the reference object may be an object predefined by a protocol, or the reference object may be an object indicated by a network-side device. Exemplarily, the reference object may be a synchronization signal, such as an SSB. Exemplarily, the reference object may be an object associated with the target object, for example, if the target object is SIB1, the reference object may be a PDCCH that schedules SIB1.

[0098] The target information includes information indicating the target object, or includes information requesting the target object. The information indicating the target object can be understood as information sent by the network device to the terminal to determine the target object. The information requesting the target object can be understood as information sent by the terminal to the network device based on an on-demand mechanism to request the target object.

[0099] The preset association relationship includes an association relationship between each object of at least one object and a CP parameter. Here, the at least one object includes at least one of the target object and the reference object. Exemplarily, the at least one object may include, for example, an SSB, SIB1, PDCCH, PDSCH, or CORESET.

[0100] The CP parameter can be understood as a parameter used to uniquely determine the CP length. For example, the CP parameter can be the CP type or CP length. The CP parameter can also be the CP number. CP types can include types such as NCP and ECP defined in related technologies. CP types can also include newly defined types such as the first CP type and the second CP type. For example, the CP of a given SCS can have multiple lengths to suit different scenarios. In this case, the multiple CP lengths can be numbered, and the CP parameter can be used to determine the number, thereby uniquely determining the CP length.

[0101] The communication device in the embodiment of the present application can be either a terminal or a network side device. That is to say, the embodiment of the present application can be applied to both a terminal and a network side device, or in other words, both the terminal and the network side device can adopt the scheme of the embodiment of the present application to determine the CP parameters of the target object and transmit the target object according to the CP length of the target object.

[0102] In an embodiment of the present application, a communication device determines the CP parameters corresponding to a target object based on first information, and the CP length of the target object is related to the CP parameters, and the first information includes: at least one of the transmission mode of the target object, the transmission parameters of the target object, the relevant information of the reference object, the target information, and the preset association relationship; the communication device transmits the target object according to the CP length of the target object. Compared with the related art in which the CP parameters of the system information-related signal are determined in a single manner (i.e., the default method is the NCP type), the embodiment of the present application can determine the CP parameters of the system information-related signal based on the transmission mode of the target object, the transmission parameters of the target object, the relevant information of the reference object, the target information or the preset association relationship, etc., which can improve the flexibility of the CP parameter determination method and enable the communication system to support a variety of CP parameters. Diversified CP parameters are conducive to resisting the interference between symbols caused by delay expansion, and can better meet the needs of different deployment scenarios and different terminal types of future communication systems. By determining the CP parameters corresponding to the target object, the terminal can correctly demodulate the system information-related signal.

[0103] In some embodiments, the communication device determines, based on the first information, a CP parameter corresponding to the target object, including at least one of the following:

[0104] In a case where the transmission mode of the target object is broadcast transmission, the communication device determines a preset first CP parameter as the CP parameter corresponding to the target object;

[0105] In the case where the transmission mode of the target object is on-demand transmission, the communication device determines the CP parameter corresponding to the target object based on the transmission parameter of the target object, the relevant information of the reference object, the target information and at least one of the preset association relationship.

[0106] In this embodiment, the communication device can first determine the CP parameters corresponding to the target object based on the transmission mode of the target object. If it is impossible to determine the CP parameters corresponding to the target object based only on the transmission mode of the target object, the communication device can further determine the CP parameters corresponding to the target object based on other aspects.

[0107] The preset first CP parameter can be understood as a default CP parameter. The default CP parameter can be predefined by a protocol or indicated by a network-side device. In this way, for a target object transmitted via broadcast transmission, the terminal can directly determine the default CP parameter as the CP parameter corresponding to the target object, which can reduce the complexity and signaling overhead of the terminal in determining the CP parameter.

[0108] The on-demand transmission mode can be understood as a transmission mode based on the on-demand mechanism. Under this transmission mode, the CP parameters corresponding to the target object can be determined based on at least one of the transmission parameters of the target object, the relevant information of the reference object, the target information and the preset association relationship.

[0109] In this implementation, different transmission modes correspond to different CP parameter determination methods, which can improve the flexibility of the CP parameter determination method and enable the communication system to support diverse CP parameters.

[0110] In some embodiments, the transmission parameter of the target object includes at least one of the following:

[0111] The SCS of the target object;

[0112] The minimum bandwidth of the target object;

[0113] The temporal location of the target object;

[0114] The frequency domain position of the target object;

[0115] Related parameters of the CORESET of the target object;

[0116] Related parameters of the search space of the target object.

[0117] In this implementation, the communication device may determine the CP parameter corresponding to the target object based on at least one of the above transmission parameters.

[0118] Taking the SCS of the target object as an example, if the SCS of the target object is 15KHz, the CP type corresponding to the target object is determined to be NCP; if the SCS of the target object is 30KHz, the CP type corresponding to the target object is determined to be ECP.

[0119] The frequency domain position of the target object may be, for example, the frequency band, subband, carrier, or FR where the target object is located.

[0120] The time domain position of the target object may be, for example, a symbol index or a frame index of the target object. Exemplarily, the communication device may determine the CP parameter corresponding to the target object based on whether the frame index of the target object is an odd number or an even number.

[0121] Exemplarily, if the target object is a PDCCH that schedules SIBx, the communications device may determine the CP parameters corresponding to the target object based on the relevant parameters of the CORESET of the PDCCH; or determine the CP parameters corresponding to the target object based on the relevant parameters of the search space of the PDCCH. The relevant parameters of the search space of the target object may be, for example, the aggregation level of the search space of the target object. For example, when the aggregation level of the search space of the PDCCH is 1 to 4, the CP type corresponding to the PDCCH is NCP; when the aggregation level of the search space of the PDCCH is 8 to 16, the CP type corresponding to the PDCCH is ECP.

[0122] In this implementation, the CP parameters corresponding to different transmission parameters (or combinations of different transmission parameters) of the target object may be the same or different, so that the communication system can support diverse CP parameters.

[0123] In some embodiments, the first information includes at least one of a transmission parameter of the target object and relevant information of the reference object;

[0124] The communication device determines, based on the first information, a CP parameter corresponding to the target object, including at least one of the following:

[0125] The communication device determines a target CP parameter as a CP parameter corresponding to the target object, where the target CP parameter is a CP parameter corresponding to the reference object, and the relevant information of the reference object includes the target CP parameter;

[0126] The communication device determines, based on the transmission parameters of the reference object, a CP parameter corresponding to the target object, where the relevant information of the reference object includes the transmission parameters of the reference object;

[0127] The communication device determines, based on the transmission parameters of the target object and the transmission parameters of the reference object, a CP parameter corresponding to the target object, wherein the relevant information of the reference object includes the transmission parameters of the reference object;

[0128] The communication device determines, according to a relative relationship between the transmission parameters of the target object and the transmission parameters of the reference object, a CP parameter corresponding to the target object, wherein the relevant information of the reference object includes the transmission parameters of the reference object;

[0129] The communication device determines a CP parameter corresponding to the target object according to a multiplexing mode of the target object and the reference object, where the relevant information of the reference object includes the multiplexing mode of the target object and the reference object.

[0130] In this implementation, the communication device may determine the CP parameter corresponding to the target object based on at least one of the transmission parameter of the target object and the relevant information of the reference object.

[0131] The relevant information of the reference object may be the CP parameters corresponding to the reference object (ie, target CP parameters), the transmission parameters of the reference object, or the multiplexing method of the target object and the reference object.

[0132] Taking the case where the relevant information of the reference object is the CP parameter corresponding to the reference object as an example, the CP parameter corresponding to the target object may be the same as the CP parameter corresponding to the reference object. In this way, the communication device may directly determine the CP parameter corresponding to the reference object as the CP parameter corresponding to the target object.

[0133] Exemplarily, the reference object may be the SSB (or SSB type) selected by the terminal. Different SSB types may correspond to different coverage ranges. With the diversification of deployment scenarios and terminal types, the terminal may select an appropriate SSB type based on the deployment scenario or terminal type. In this example, the CP parameters corresponding to the SSB type are determined as the CP parameters of the target object, which can better meet the requirements of different coverage ranges.

[0134] In addition, the reference object may also be an object used to schedule the target object; or, the reference object may be an object used to carry the target object.

[0135] Taking the example where the relevant information of the reference object is the transmission parameters of the reference object, the communication device can determine the CP parameters corresponding to the target object based solely on the transmission parameters of the reference object, or the communication device can determine the CP parameters corresponding to the target object by combining the transmission parameters of the target object and the transmission parameters of the reference object, or the communication device determines the CP parameters corresponding to the target object based on the relative relationship between the transmission parameters of the target object and the transmission parameters of the reference object.

[0136] Optionally, the transmission parameter of the reference object includes at least one of the following:

[0137] the SCS of the reference object;

[0138] the minimum bandwidth of the reference object;

[0139] The frequency domain position of the reference object;

[0140] The temporal position of the reference object;

[0141] Related parameters of the CORESET of the reference object;

[0142] Related parameters of the search space of the reference object.

[0143] Exemplarily, if the target object is SIBx (or a PDSCH carrying SIBx), the communication device may determine the CP parameters corresponding to the target object based on the relevant parameters of the CORESET of the PDCCH that schedules the SIBx; or, the communication device may determine the CP parameters corresponding to the target object based on the parameters related to the search space of the PDCCH that schedules the SIBx, where PDCCH can be understood as a reference object. The relevant parameters of the search space of the reference object may be, for example, the aggregation level of the search space of the reference object. For example, when the aggregation level of the search space of the PDCCH is 1 to 4, the CP type corresponding to the SIBx is NCP, and when the aggregation level of the search space of the PDCCH is 8 to 16, the CP type corresponding to the SIBx is ECP.

[0144] Exemplarily, the communication device may determine the CP parameters corresponding to the target object based on the SCS of the target object and the SCS of the reference object. For example, the protocol may predefine a mapping relationship or table between the SCS of the target object, the SCS of the reference object, and the CP parameters, and the communication device determines the CP parameters corresponding to the target object by looking up the table.

[0145] In this implementation, the CP parameters corresponding to different transmission parameters (or combinations of different transmission parameters) may be the same or different, so that the communication system can support diverse CP parameters.

[0146] In this implementation, the CP parameters corresponding to different transmission parameters (or combinations of different transmission parameters) of the reference object may be the same or different, so that the communication system can support diverse CP parameters.

[0147] Optionally, the relative relationship between the transmission parameter of the target object and the transmission parameter of the reference object includes at least one of the following:

[0148] The size relationship between the SCS of the target object and the SCS of the reference object;

[0149] The frequency domain position relationship of the target object relative to the reference object;

[0150] The temporal position relationship of the target object relative to the reference object.

[0151] In some embodiments, the communication device determines the CP parameter corresponding to the target object based on a relative relationship between the transmission parameter of the target object and the transmission parameter of the reference object, including at least one of the following:

[0152] In a case where the SCS of the target object is equal to the SCS of the reference object, the communication device determines the target CP parameter as the CP parameter corresponding to the target object;

[0153] When the SCS of the target object is greater than the SCS of the reference object, the communication device determines the second CP parameter as the CP parameter corresponding to the target object, and the CP length corresponding to the second CP parameter is greater than or equal to the CP length corresponding to the target CP parameter, or the ratio of the CP length corresponding to the second CP parameter to the length of the time domain signal is greater than or equal to the ratio of the CP length corresponding to the target CP parameter to the length of the time domain signal;

[0154] When the SCS of the target object is smaller than the SCS of the reference object, the communication device determines the third CP parameter as the CP parameter corresponding to the target object, and the CP length corresponding to the third CP parameter is smaller than or equal to the CP length corresponding to the target CP parameter, or the ratio of the CP length corresponding to the third CP parameter to the length of the time domain signal is smaller than or equal to the ratio of the CP length corresponding to the target CP parameter to the length of the time domain signal.

[0155] Here, the ratio of the CP length to the length of the time domain signal can be understood as the ratio of the length of the CP portion in the time domain signal to the length of the entire time domain signal. The time domain signal can be, for example, an OFDM symbol or a time domain signal obtained by performing an IFFT transformation on modulated data.

[0156] For example, if the SCS of the target object and the reference object are the same, the CP parameters of the target object and the reference object are the same; if the SCS of the target object is greater than the SCS of the reference object, the target object adopts a longer CP than the reference object; if the SCS of the target object is less than the SCS of the reference object, the target object adopts a shorter CP than the reference object.

[0157] In some embodiments, the communication device determines the CP parameter corresponding to the target object based on a relative relationship between the transmission parameter of the target object and the transmission parameter of the reference object, including at least one of the following:

[0158] In a case where the target object and the reference object are located at the same frequency domain position, the communication device determines the target CP parameter as the CP parameter corresponding to the target object;

[0159] In a case where the frequency domain position of the target object is within the frequency domain range of the reference object, the communication device determines the target CP parameter as the CP parameter corresponding to the target object;

[0160] In a case where a frequency domain interval between the target object and the reference object is smaller than a first threshold, the communication device determines the target CP parameter as the CP parameter corresponding to the target object.

[0161] For example, the communication device can determine whether the target object and the reference object are in the same subband / carrier / band / band combination. If the target object and the reference object are in the same subband / carrier / band / band combination, the CP parameters of the target object and the reference object are the same.

[0162] For example, the communication device can determine whether the frequency domain interval between the target object and the reference object is less than a given threshold (such as whether the carriers where the target object and the reference object are located are continuous). If the frequency domain interval between the target object and the reference object is less than the given threshold, the CP parameters of the target object and the reference object are the same.

[0163] In some embodiments, the communication device determines, according to a multiplexing mode of the target object and the reference object, a CP parameter corresponding to the target object, including:

[0164] In a case where the multiplexing mode of the target object and the reference object is frequency division multiplexing, the communication device determines the target CP parameter as the CP parameter corresponding to the target object.

[0165] For example, the protocol can predefine the following rules: When the target object and the reference object are frequency-division multiplexed, their CP parameters can be the same; when the target object and the reference object are time-division multiplexed, their CP parameters can be different. Taking the reference object as SSB and the target object as CORESET0 as an example, when the multiplexing mode is Type 3, CORESET0 and SSB are frequency-division multiplexed, and the CP parameters of CORESET0 are the same as the CP parameters of SSB. When the multiplexing mode is Type 1 or Type 2, CORESET0 and SSB are time-division multiplexed, and the CP parameters of CORESET0 can be determined by other methods.

[0166] It should be noted that the communication device may combine one or more of the methods described in the above embodiments to determine the CP parameters corresponding to the target object. For example, the communication device may first determine the CP parameters based on the multiplexing method of the target object and the reference object. If the target object and the reference object are frequency-division multiplexed, the CP parameters of the target object and the reference object are the same. If the target object and the reference object are time-division multiplexed, the CP parameters of the target object and the reference object are then determined based on the transmission parameters of the target object and the transmission parameters of the reference object.

[0167] In some embodiments, the first information includes the target information, and the target information includes CP parameter related information;

[0168] The communication device determines, based on the first information, a CP parameter corresponding to the target object, including:

[0169] The communication device determines the CP parameter corresponding to the CP parameter-related information as the CP parameter corresponding to the target object.

[0170] In this implementation, the communication device may determine the CP parameters corresponding to the target object based solely on the target information.

[0171] In this embodiment, at least part of the target information is CP parameter-related information. In this way, the communication device can directly determine the CP parameters corresponding to the CP parameter-related information as the CP parameters corresponding to the target object. This CP parameter determination method can reduce the complexity and signaling overhead of the terminal in determining the CP parameters.

[0172] Optionally, the CP parameter-related information includes at least one of the following:

[0173] CP type information;

[0174] CP length information;

[0175] Joint coding information carrying CP type information;

[0176] Jointly coded information carrying CP length information;

[0177] Index indication information, where the index indication information is associated with the CP parameter.

[0178] Exemplarily, the CP type information may be used to indicate one or more CP types, where the CP type may be, for example, a first CP type, a second CP type, a third CP type, etc. Each CP type corresponds to a different CP length according to different SCSs.

[0179] Exemplarily, the CP length information may be used to indicate one or more CP lengths, such as n sampling points (samples) or n time units.

[0180] Exemplarily, the CP length information may be the value of a parameter in a CP length formula, where the CP length formula may be predefined by a protocol.

[0181] Exemplarily, the joint coding information can be used to indicate one or more joint codings, each joint coding includes CP type information, and the joint coding information can be, for example, a joint coding indication of the CP type information and the SCS, such as 60KHz-ECP; or, the joint coding information can be, for example, a joint coding indication of the CP type information and the reference position, such as pos3-ECP.

[0182] Exemplarily, the index indication information may be used to indicate one or more tables, for example, a table predefined by the protocol containing CP parameters, and the index indication information includes an index of the table.

[0183] Optionally, the target object includes at least one of a first target object and a second target object, the first target object is a target object of a serving cell, and the second target object is a target object of a neighboring cell;

[0184] The target information includes at least one of the following:

[0185] Information indicating the first target object;

[0186] Information indicating the second target object;

[0187] Used to request information about the first target object;

[0188] Used to request information about the second target object.

[0189] Optionally, the target information includes at least one of the following:

[0190] Neighboring cell measurement information sent by the network device to the terminal for cell selection or reselection;

[0191] Configuration information for the Scell ​​sent by the network side device to the terminal;

[0192] Configuration information for on-demand signaling sent by the network side device to the terminal;

[0193] WUS sent by the network side device to the terminal;

[0194] The terminal sends a request signal to the network side device;

[0195] WUS sent by the terminal to the network-side device.

[0196] Exemplarily, the target information may be indication information in the SSB used to indicate the PDCCH used to carry the scheduling SIB1 information. Here, the target object is the PDCCH used to carry the scheduling SIB1 information, specifically, the first target object.

[0197] Exemplarily, the target information may be indication information for indicating a target object included in other signals during the initial access process, such as indication information included in SIB1 for indicating a PDCCH for carrying SIB2 scheduling information. Here, the target object is a PDCCH for carrying SIB2 scheduling information, specifically, the first target object.

[0198] Exemplarily, the target information may be a request signal or activation signal for requesting a demand-based target object (such as an on-demand SIB1 or on-demand OSI). The request signal or activation signal may be triggered by a network-side device or by a terminal. The activation signal may be understood as a signal of a wake-up mechanism, such as a wake-up signal (WUS). Here, the target object may be an on-demand SIB1, specifically, the first target object; or the target object may be an on-demand OSI, specifically, the first target object.

[0199] Exemplarily, the target information may be configuration information for a neighboring cell, or reselection information for a neighboring cell, or measurement information for a neighboring cell, or a reselection threshold for a neighboring cell, or an activation signal for a demand-based target object (such as on demand SIB1 or on demand OSI) for a neighboring cell.

[0200] Exemplarily, the target information may be configuration information for a Scell.

[0201] In some embodiments, the at least one object includes at least one of the following:

[0202] At least one SSB type;

[0203] SIBx corresponding to each SSB type of at least one SSB type, where x in SIBx is a natural number;

[0204] At least one SSB type and a corresponding CORESET for each SSB type.

[0205] That is, the preset association relationship includes at least one of the following:

[0206] an association between each SSB type and a CP parameter of at least one SSB type;

[0207] The association between the SIBx and CP parameters corresponding to each SSB type of at least one SSB type;

[0208] The association relationship between the CORESET and CP parameters corresponding to each SSB type of at least one SSB type.

[0209] In this implementation, the communication device may determine the CP parameter corresponding to the target object based solely on the preset association relationship.

[0210] For example, when there are multiple SSB types, an association relationship between each SSB type and a CP parameter can be preset, and the CP parameters of CORESET0 / SIB1 corresponding to each SSB type can be determined by the preset association relationship. For example, a table of SSB types to CP parameters is introduced, where the CP is applied not only to the SSB, but also to the CORESET0 / SIB1 associated with the SSB, etc. For another example, a table of SSB types and associated CORESET0 / SIB1 CP parameters is introduced, where the CP parameters are only applied to the CORESET0 / SIB1 associated with the SSB, etc.

[0211] In this implementation, the manner of determining the CP parameters based on the preset association relationship can reduce the complexity and signaling overhead of the terminal in determining the CP parameters.

[0212] In some embodiments, different priorities can be set for different CP parameter determination methods. In this way, the communication device can first use the high-priority method to determine the CP parameters corresponding to the target object in order of priority. If it cannot be determined, the second-highest priority method can be used to determine the CP parameters corresponding to the target object, and so on.

[0213] Exemplarily, the CP parameters of the target object are first determined according to the transmission mode of the target object. If it is a broadcast mode, the default CP parameters are adopted. If it is an on-demand mode, the CP parameters of the target object are further determined according to the target information.

[0214] In addition, if the CP parameters corresponding to the target object determined by a certain method include multiple CP parameters, other methods may be combined to further determine the CP parameters corresponding to the target object.

[0215] For example, if there are multiple CP parameters associated with a certain SSB type in a preset association relationship, then the multiple optional CP parameters corresponding to the SSB type can be determined first based on the preset association relationship, and then the CP parameters corresponding to the target object can be determined based on the transmission parameters of the target object and the transmission parameters of the reference object.

[0216] In order to better understand the embodiments of the present application, the following takes a communication device as an example to provide multiple specific embodiments to illustrate how the communication device determines the CP parameters corresponding to the target object.

[0217] Example 1: The terminal determines the CP parameter of the target object according to the selected SSB type or the association relationship with the SSB type

[0218] For the initial access process, the CP type or CP length of the target object can be bound to the SSB type selected by the terminal, thereby achieving initial access in an area of ​​a specific coverage size.

[0219] In some embodiments, the CP length of the target object is determined by the CP type of the SSB selected by the terminal, such as the PDCCH (CORESET0) scheduling SIB1 or the CP type of SIB1 is the same as the CP type of the SSB selected by the terminal.

[0220] In some embodiments, for example, a table of SSB types and associated CORESET0 / SIB1 CP types is introduced, where the CP type is only applied to the CORESET0 / SIB1, etc., to which this SSB is associated, as shown in Table 1.

[0221] Table 1

[0222] The terminal can determine the SSB type to be used according to the terminal type, which includes NTN type terminal or non-NTN type terminal, reduced capability (Redcap) terminal or ordinary terminal, low power consumption terminal (such as artificial intelligence Internet of Things (AIOT) terminal or low power wake-up receiver (LP-WUR) terminal) or ordinary power consumption terminal.

[0223] Different SSB indexes may correspond to different SSB types, and different SSB types correspond to different coverage ranges, so areas with various coverage range sizes can be achieved.

[0224] Example 2: The terminal determines the CP parameter of the target object according to the transmission parameter or transmission mode of the target object

[0225] According to one implementation, the protocol may predefine CP parameters corresponding to each SCS. Therefore, the terminal can determine the CP parameters based on the SCS. Target objects within the same SCS may be defined to correspond to the same CP parameters, or to correspond to different CP parameters. For example, for a given SCS, the protocol may predefine one CP parameter for SIB1 and another for OSI to meet different coverage requirements.

[0226] According to one implementation, a table is predefined in the protocol. Taking Table 2 as an example, the CP type or CP length of the target object is determined based on the SCS of the target object and the SCS of the reference object.

[0227] Table 2

[0228] The subcarrier spacing of the PDCCH in Table 2 may be indicated by the subCarrierSpacingCommon parameter in the MIB.

[0229] According to one implementation, the protocol may predefine CP parameters for each band, subband, carrier, or frame rate. When a terminal receives a target object in a given band, subband, carrier, or frame rate, it can receive the target object based on the CP parameters corresponding to the band, subband, carrier, or frame rate. This approach allows the appropriate CP length to be selected based on the frequency domain application scenario or channel quality, avoiding resource waste, inter-symbol interference caused by a too short CP, and reducing signaling overhead.

[0230] According to one implementation method, the protocol may predefine the CP parameters corresponding to the target object that meets a specific frequency domain position relationship. The terminal may determine the CP parameters of the target object based on the relative frequency domain position relationship between the target object and the reference object. In addition, the relative frequency domain position relationship includes whether the target object and the reference object are in the same subband / carrier / band / specific band combination, or whether the frequency domain interval between the target object and the reference object is less than a given threshold, such as whether the target object and the reference object are in multiple consecutive carriers, or whether the interval between the frequency domain resources of the target object and the reference object is less than a given threshold. In this way, the target object and the reference object may have the same requirements for the CP parameters, such as belonging to the same beam, or having the same coverage requirements, or serving the same terminal type. Binding the CP parameters of the target object with the CP parameters of the reference object can not only flexibly meet system requirements, but also reduce signaling overhead.

[0231] According to an example, the reference object is an SSB, and the target object is a PDCCH that schedules SIB1. If the terminal detects the SSB, and the SSB indicates frequency domain information of CORESET0 (i.e., the PDCCH that schedules SIB1), the terminal can determine the CP parameter of CORESET0 based on the frequency domain position relationship between CORESET0 and the SSB.

[0232] According to one example, the reference object is the SSB, and the target object is SIB1. The terminal detects the SSB, and based on the frequency domain information of CORESET0 (i.e., the PDCCH that schedules SIB1) indicated in the SSB, the terminal blindly detects the PDCCH that schedules SIB1. The PDCCH indicates the frequency domain information of SIB1, and the terminal can determine the CP parameters of SIB1 based on the frequency domain position relationship between SIB1 and the SSB.

[0233] According to one example, the reference object is SIB1, and the target object is SIB2 (or other OSI). Based on the indication information in SIB1, the terminal blindly detects the PDCCH scheduled by SIB2. The PDCCH indicates the frequency domain information of SIB2. The terminal can then determine the CP parameters of SIB2 based on the frequency domain position relationship between SIB2 and SIB1.

[0234] According to an example, the reference object refers to an object that includes target information, and the target information is used to determine (or indicate or request) the target object. Then the CP parameter of the target object can be determined based on the relative frequency domain position relationship between the target object and the reference object. For example, SSB can indicate the frequency domain position of the PDCCH that schedules SIB1 (i.e., the CORESET0 range), then the CP parameter of the PDCCH that schedules SIB1 can be determined based on the relative frequency domain position relationship between CORESET0 and SSB.

[0235] Embodiment 3: The terminal determines the CP parameter of the target object according to the indication information (ie, target information) used to determine the target object

[0236] In some scenarios, after detecting indication information for determining a target object, the terminal determines the CP length of the target object. The target object may be of a serving cell or another cell.

[0237] According to one implementation method, the terminal may determine the CP length or CP type of the target object based on the indication information used to determine the target object. For example, the SSB contains indication information for determining the PDCCH for scheduling SIB1, and the indication information also contains CP parameter-related information of the PDCCH for scheduling SIB1, which can determine the CP length of the PDCCH for scheduling SIB1. Alternatively, the SSB contains indication information for determining the PDCCH for scheduling SIB1, and the position of SIB1 is further determined based on the PDCCH. Then, the indication information in the SSB also belongs to the indication information for determining SIB1, and the CP parameter-related information contained in the indication information in the SSB can also be used to determine the CP length of SIB1. Alternatively, the indication information in the PDCCH for scheduling SIB1 is used to determine the position of SIB1, and the CP parameter-related information contained in the indication information in the PDCCH is used to determine the CP length of SIB1.

[0238] Optionally, the CP parameter-related information included in the indication information for determining the target object may be indicated separately from the time domain information (or frequency domain information). Optionally, the CP parameter-related information included in the indication information for determining the target object may be indicated jointly with the time domain information (or frequency domain information). For example, the protocol predefines the time domain information of the target object (the time domain position of the reference object can be used as a reference), and the time domain information is presented in the form of a table, where each row in the table provides a type of frequency domain information and a CP parameter.

[0239] According to one implementation, the indication information used to determine the target object may include one or more joint coding type indications, and the joint coding type may indicate CP-related parameters and other parameters. For example, in the MIB message of the SSB, a single IE is used to simultaneously indicate the subcarrier spacing and cyclic prefix type during the initial access process, such as scs15-NCP, scs60-NCP, or scs60-ECP. For example, in the MIB message of the SSB, a single IE is used to simultaneously indicate the reference object position coding indication and the cyclic prefix type, such as pos2-NCP, pos3-NCP, or pos3-ECP.

[0240] According to one implementation, the protocol predefines a table containing CP parameters, which can be included in the target object's indication information. For example, CP-related parameters are added to Tables 13-1 through 13-10 of TS38.213 (Table 13-9, as shown in Table 3). The table to be searched is determined based on the minimum channel bandwidth, SSB SCS, and PDCCH SCS. The controlResourceSetZero field in the upper 4 bits (MSB) of Pdcch-ConfigSIB1 is searched to determine the time-frequency resource information and CP parameters for CORESET0.

[0241] Table 3

[0242] According to one implementation, the protocol predefines a table containing CP parameters, and the index of the table can be included in the indication information of the target object. For example, TS38.213 Tables 13-11 to 13-14 add parameters related to the cyclic prefix (Table 13-13 is used as an example, as shown in Table 4). Based on the parameters of CORESET0, the table to be searched for the PDCCH monitoring timing is determined. By searching the corresponding table based on the SearchSpaceZero field, the relevant parameters of the search space, including the CP parameters of the search space, can be obtained.

[0243] Table 4

[0244] According to one implementation, in a carrier aggregation (CA) or dual connectivity (DC) scenario, after a terminal accesses a serving cell, if the cell is an Scell, a network device may configure the Scell ​​for the terminal, and the information configuring the Scell ​​may include CP parameter-related information used to determine a target object (SIB2 / SIB3) of the Scell. The network device may configure multiple CP parameters for a Scell, and the network device may indicate a CP parameter in the signaling for activating the Scell.

[0245] The network side device may configure a CP parameter applicable to multiple target objects, or the network side device may configure a CP parameter for each target object separately.

[0246] According to one implementation, the current serving cell may provide the terminal with information about multiple neighboring cells, such as measurement information of neighboring cells used for cell selection / reselection, which may include information related to CP parameters used to determine target objects for the neighboring cells. The network device may configure a CP parameter applicable to multiple target objects for one or a group of neighboring cells, or the network device may configure CP parameters for each target object separately.

[0247] According to one implementation method, the current serving cell may provide the terminal with configuration information of a demand-based target object (e.g., on demand SIB1 or on demand OSI) of the current cell or another cell (e.g., Scell ​​or neighboring cell), for example, information of the WUS configured to request the target object, which may include information related to CP parameters for determining the target object of the cell.

[0248] Optionally, the terminal reports the preferred CP parameters when requesting the target object. For example, the terminal may report the CP type of the target object preferred by the terminal in the neighboring cell to the current serving cell, or the terminal may report the preferred CP type to the cell of the target object. For example, the wake-up signal sent by the terminal may explicitly or implicitly indicate the preferred CP parameters. After receiving the wake-up signal sent by the terminal, the network side device may send a downlink signal to configure CP parameter related information or confirm the CP preference reported by the terminal. For example, the downlink signal is a confirmation signal for responding to the wake-up signal sent by the terminal, which may carry CP parameter related information or confirmation information of the CP preference reported by the terminal.

[0249] According to one implementation, the current serving cell may provide the terminal with information related to the CP parameters of the target object of the current serving cell. If the network device needs to update the information related to the CP parameters of the target object of the serving cell, the network device may notify the terminal before changing the CP parameters of the synchronization signal. For example, the network device may carry the information related to the CP parameters of the target object via system information, paging information, or user-specific signaling. The terminal may determine the CP length of the target object based on this information.

[0250] In summary, the embodiments of the present application can improve the flexibility of the CP parameter determination method, enabling the communication system to support a variety of CP parameters. Diversified CP parameters are conducive to resisting the inter-symbol interference caused by delay spread, and can better meet the needs of different deployment scenarios and different terminal types of future communication systems.

[0251] The CP parameter determination method provided in the embodiment of the present application can be executed by a CP parameter determination device. In the embodiment of the present application, the CP parameter determination device performing the CP parameter determination method is used as an example to illustrate the CP parameter determination device provided in the embodiment of the present application.

[0252] 4 , an embodiment of the present application further provides a CP parameter determination device. As shown in FIG4 , the CP parameter determination device 400 includes:

[0253] A first processing unit 401 is configured to determine a CP parameter corresponding to a target object based on first information, where the CP length of the target object is related to the CP parameter, and the first information includes at least one of: a transmission mode of the target object, a transmission parameter of the target object, relevant information of a reference object, target information, and a preset association relationship;

[0254] A second processing unit 402 is configured to transmit the target object according to the CP length of the target object;

[0255] The target object includes at least one of system information SI, system information block SIB, a downlink control channel for scheduling SI or SIB, and a downlink shared channel for carrying SI or SIB;

[0256] The reference object includes at least one of SI, SIB, synchronization signal block SSB, broadcast signal, downlink control channel, and downlink shared channel transmitted before the target object;

[0257] The target information includes information for indicating the target object, or the target information includes information for requesting the target object;

[0258] The preset association relationship includes an association relationship between each object of at least one object and a CP parameter, and the at least one object includes at least one of the target object and the reference object.

[0259] Optionally, the first processing unit 401 includes at least one of the following:

[0260] A first processing subunit is configured to, when the transmission mode of the target object is broadcast transmission, determine a preset first CP parameter as a CP parameter corresponding to the target object;

[0261] The first processing sub-unit is used to determine the CP parameter corresponding to the target object based on the transmission parameter of the target object, the relevant information of the reference object, the target information and at least one of the preset association relationship when the transmission mode of the target object is on-demand transmission.

[0262] Optionally, the transmission parameter of the target object includes at least one of the following:

[0263] The subcarrier spacing SCS of the target object;

[0264] The minimum bandwidth of the target object;

[0265] The temporal location of the target object;

[0266] The frequency domain position of the target object;

[0267] Relevant parameters of the control resource set CORESET of the target object;

[0268] Related parameters of the search space of the target object.

[0269] Optionally, the first information includes at least one of a transmission parameter of the target object and relevant information of the reference object;

[0270] The first processing unit 401 includes at least one of the following:

[0271] a third processing subunit, configured to determine a target CP parameter as a CP parameter corresponding to the target object, wherein the target CP parameter is a CP parameter corresponding to the reference object, and the relevant information of the reference object includes the target CP parameter;

[0272] a fourth processing subunit, configured to determine a CP parameter corresponding to the target object according to the transmission parameter of the target object and the transmission parameter of the reference object, wherein the relevant information of the reference object includes the transmission parameter of the reference object;

[0273] a fifth processing subunit, configured to determine a CP parameter corresponding to the target object according to the transmission parameter of the reference object, wherein the relevant information of the reference object includes the transmission parameter of the reference object;

[0274] a sixth processing subunit, configured to determine a CP parameter corresponding to the target object according to a relative relationship between the transmission parameter of the target object and the transmission parameter of the reference object, wherein the relevant information of the reference object includes the transmission parameter of the reference object;

[0275] The seventh processing subunit is configured to determine a CP parameter corresponding to the target object according to a multiplexing mode of the target object and the reference object, wherein the relevant information of the reference object includes the multiplexing mode of the target object and the reference object.

[0276] Optionally, the transmission parameters of the reference object include at least one of the following: the SCS of the reference object; the minimum bandwidth of the reference object; the frequency domain position of the reference object; the time domain position of the reference object; relevant parameters of the CORESET of the reference object; and relevant parameters of the search space of the reference object.

[0277] Optionally, the relative relationship between the transmission parameter of the target object and the transmission parameter of the reference object includes at least one of the following:

[0278] The size relationship between the SCS of the target object and the SCS of the reference object;

[0279] The frequency domain position relationship of the target object relative to the reference object;

[0280] The temporal position relationship of the target object relative to the reference object.

[0281] Optionally, the sixth processing subunit is specifically configured to perform at least one of the following:

[0282] When the SCS of the target object is equal to the SCS of the reference object, determining the target CP parameter as the CP parameter corresponding to the target object;

[0283] When the SCS of the target object is greater than the SCS of the reference object, a second CP parameter is determined as the CP parameter corresponding to the target object, and a CP length corresponding to the second CP parameter is greater than or equal to the CP length corresponding to the target CP parameter, or a ratio of the CP length corresponding to the second CP parameter to the length of the time domain signal is greater than or equal to the ratio of the CP length corresponding to the target CP parameter to the length of the time domain signal;

[0284] When the SCS of the target object is smaller than the SCS of the reference object, a third CP parameter is determined as the CP parameter corresponding to the target object, and a CP length corresponding to the third CP parameter is less than or equal to the CP length corresponding to the target CP parameter, or a ratio of the CP length corresponding to the third CP parameter to the length of the time domain signal is less than or equal to the ratio of the CP length corresponding to the target CP parameter to the length of the time domain signal;

[0285] In a case where the target object and the reference object are located at the same frequency domain position, determining the target CP parameter as the CP parameter corresponding to the target object;

[0286] In a case where the frequency domain position of the target object is within the frequency domain range of the reference object, determining the target CP parameter as the CP parameter corresponding to the target object;

[0287] In a case where the frequency domain interval between the target object and the reference object is smaller than a first threshold, the target CP parameter is determined as the CP parameter corresponding to the target object.

[0288] Optionally, the seventh processing subunit is specifically configured to:

[0289] In a case where the multiplexing mode of the target object and the reference object is frequency division multiplexing, the target CP parameter is determined to be the CP parameter corresponding to the target object.

[0290] Optionally, the reference object is predefined by a protocol, or the reference object is indicated by a network-side device.

[0291] Optionally, the reference object is an SSB selected by the terminal; or

[0292] The reference object is an object used to schedule the target object; or

[0293] The reference object is an object used to carry the target object.

[0294] Optionally, the first information includes the target information, and the target information includes CP parameter related information;

[0295] The first processing unit 401 includes:

[0296] An eighth processing sub-unit is configured to determine the CP parameter corresponding to the CP parameter-related information as the CP parameter corresponding to the target object.

[0297] Optionally, the CP parameter-related information includes at least one of the following:

[0298] CP type information;

[0299] CP length information;

[0300] Joint coding information carrying CP type information;

[0301] Jointly coded information carrying CP length information;

[0302] Index indication information, where the index indication information is associated with the CP parameter.

[0303] Optionally, the target object includes at least one of a first target object and a second target object, the first target object is a target object of a serving cell, and the second target object is a target object of a neighboring cell;

[0304] The target information includes at least one of the following:

[0305] Information indicating the first target object;

[0306] Information indicating the second target object;

[0307] Used to request information about the first target object;

[0308] Used to request information about the second target object.

[0309] Optionally, the target information includes at least one of the following:

[0310] Neighboring cell measurement information sent by the network device to the terminal for cell selection or reselection;

[0311] Configuration information for the secondary cell (Scell) sent by the network side device to the terminal;

[0312] Configuration information for on-demand signaling sent by the network side device to the terminal;

[0313] A wake-up signal WUS is sent by the network side device to the terminal;

[0314] The terminal sends a request signal to the network side device;

[0315] WUS sent by the terminal to the network-side device.

[0316] Optionally, the at least one object includes at least one of the following:

[0317] At least one SSB type;

[0318] SIBx corresponding to each SSB type of at least one SSB type, where x in SIBx is a natural number;

[0319] At least one SSB type and a corresponding CORESET for each SSB type.

[0320] In summary, the embodiments of the present application can improve the flexibility of the CP parameter determination method, enabling the communication system to support a variety of CP parameters. Diversified CP parameters are conducive to resisting the inter-symbol interference caused by delay spread, and can better meet the needs of different deployment scenarios and different terminal types of future communication systems.

[0321] The CP parameter determination device in the embodiments of the present application can be an electronic device, such as an electronic device with an operating system, or a component in an electronic device, such as an integrated circuit or chip. The electronic device can be a terminal or other device other than a terminal. For example, the terminal can include but is not limited to the types of terminal 11 listed above, and other devices can be servers, network attached storage (NAS), etc., which are not specifically limited in the embodiments of the present application.

[0322] The CP parameter determination device provided in the embodiment of the present application can implement each process implemented in the method embodiment of Figure 3 and achieve the same technical effect. To avoid repetition, it will not be described here.

[0323] As shown in Figure 5, an embodiment of the present application further provides a communication device 900, including a processor 901 and a memory 902. The memory 902 stores a program or instruction that can be run on the processor 901. For example, when the communication device 900 is a terminal, the program or instruction is executed by the processor 901 to implement the various steps of the above-mentioned method embodiment and can achieve the same technical effect. When the communication device 900 is a network-side device, the program or instruction is executed by the processor 901 to implement the various steps of the above-mentioned method embodiment and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0324] The present application also provides a terminal comprising a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is configured to execute a program or instruction to implement the steps of the method embodiment shown in FIG3 . This terminal embodiment corresponds to the aforementioned method embodiment, and each implementation process and implementation method of the aforementioned method embodiment are applicable to this terminal embodiment and can achieve the same technical effects. Specifically, FIG6 is a schematic diagram of the hardware structure of a terminal implementing an embodiment of the present application.

[0325] The terminal 1000 includes but is not limited to: a radio frequency unit 1001, a network module 1002, an audio output unit 1003, an input unit 1004, a sensor 1005, a display unit 1006, a user input unit 1007, an interface unit 1008, a memory 1009 and at least some of the components of the processor 1010.

[0326] Those skilled in the art will appreciate that the terminal 1000 may also include a power supply (such as a battery) to power various components. The power supply may be logically connected to the processor 1010 via a power management system, thereby enabling the power management system to manage charging, discharging, and power consumption. The terminal structure shown in FIG6 does not limit the terminal. The terminal may include more or fewer components than shown, or may combine certain components, or have different component arrangements, which will not be described in detail here.

[0327] It should be understood that in an embodiment of the present application, the input unit 1004 may include a graphics processing unit (GPU) 10041 and a microphone 10042, and the graphics processor 10041 processes the image data of a static picture or video obtained by an image capture device (such as a camera) in a video capture mode or an image capture mode. The display unit 1006 may include a display panel 10061, and the display panel 10061 may be configured in the form of a liquid crystal display, an organic light emitting diode, etc. The user input unit 1007 includes a touch panel 10071 and at least one of other input devices 10072. The touch panel 10071 is also called a touch screen. The touch panel 10071 may include two parts: a touch detection device and a touch controller. Other input devices 10072 may include, but are not limited to, a physical keyboard, function keys (such as volume control keys, switch keys, etc.), a trackball, a mouse, and an operating stick, which will not be repeated here.

[0328] In the embodiment of the present application, after receiving downlink data from a network-side device, the RF unit 1001 may transmit the data to the processor 1010 for processing. Furthermore, the RF unit 1001 may send uplink data to the network-side device. Typically, the RF unit 1001 includes, but is not limited to, an antenna, an amplifier, a transceiver, a coupler, a low-noise amplifier, a duplexer, and the like.

[0329] The memory 1009 can be used to store software programs or instructions and various data. The memory 1009 may mainly include a first storage area for storing programs or instructions and a second storage area for storing data, wherein the first storage area may store an operating system, applications or instructions required for at least one function (such as a sound playback function, an image playback function, etc.). In addition, the memory 1009 may include a volatile memory or a non-volatile memory. Among them, the non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM), a static random access memory (SRAM), a dynamic random access memory (DRAM), a synchronous dynamic random access memory (SDRAM), a double data rate synchronous dynamic random access memory (DDRSDRAM), an enhanced synchronous dynamic random access memory (ESDRAM), a synchronous link dynamic random access memory (SLDRAM), and a direct memory bus random access memory (DRRAM). The memory 1009 in the embodiment of the present application includes but is not limited to these and any other suitable types of memory.

[0330] Processor 1010 may include one or more processing units. Optionally, processor 1010 integrates an application processor and a modem processor. The application processor primarily handles operations related to the operating system, user interface, and application programs, while the modem processor primarily processes wireless communication signals, such as a baseband processor. It is understood that the modem processor may not be integrated into processor 1010.

[0331] The processor 1010 is configured to:

[0332] Determining, based on first information, a CP parameter corresponding to a target object, where a CP length of the target object is related to the CP parameter, the first information including at least one of: a transmission mode of the target object, a transmission parameter of the target object, relevant information of a reference object, target information, and a preset association relationship;

[0333] Transmitting the target object according to the CP length of the target object;

[0334] The target object includes at least one of system information SI, system information block SIB, a downlink control channel for scheduling SI or SIB, and a downlink shared channel for carrying SI or SIB;

[0335] The reference object includes at least one of SI, SIB, synchronization signal block SSB, broadcast signal, downlink control channel, and downlink shared channel transmitted before the target object;

[0336] The target information includes information for indicating the target object, or the target information includes information for requesting the target object;

[0337] The preset association relationship includes an association relationship between each object of at least one object and a CP parameter, and the at least one object includes at least one of the target object and the reference object.

[0338] In summary, the embodiments of the present application can improve the flexibility of the CP parameter determination method, enabling the communication system to support a variety of CP parameters. Diversified CP parameters are conducive to resisting the inter-symbol interference caused by delay spread, and can better meet the needs of different deployment scenarios and different terminal types of future communication systems.

[0339] It can be understood that the implementation process of each implementation method mentioned in this embodiment can refer to the relevant description of the CP parameter determination method embodiment and achieve the same or corresponding technical effects. To avoid repetition, it will not be repeated here.

[0340] The present application also provides a network-side device, including a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is configured to execute a program or instruction to implement the steps of the method embodiment shown in FIG3 . This network-side device embodiment corresponds to the above-described method embodiment, and each implementation process and implementation method of the above-described method embodiment are applicable to this network-side device embodiment and can achieve the same technical effects.

[0341] Specifically, embodiments of the present application also provide a network-side device. As shown in Figure 7, the network-side device 1100 includes an antenna 111, a radio frequency device 112, a baseband device 113, a processor 114, and a memory 115. Antenna 111 is connected to radio frequency device 112. In the uplink direction, radio frequency device 112 receives information via antenna 111 and sends the received information to baseband device 113 for processing. In the downlink direction, baseband device 113 processes the information to be transmitted and sends it to radio frequency device 112. Radio frequency device 112 processes the received information and then sends it through antenna 111.

[0342] The method executed by the network-side device in the above embodiment may be implemented in the baseband device 113 , which includes a baseband processor.

[0343] The baseband device 113 may include, for example, at least one baseband board, on which multiple chips are arranged, as shown in Figure 7, one of which is, for example, a baseband processor, which is connected to the memory 115 through a bus interface to call the program in the memory 115 and execute the network-side device operations shown in the above method embodiment.

[0344] The network side device may further include a network interface 116, which is, for example, a Common Public Radio Interface (CPRI).

[0345] Specifically, the network side device 1100 of the embodiment of the present application also includes: instructions or programs stored in the memory 115 and executable on the processor 114. The processor 114 calls the instructions or programs in the memory 115 to execute the methods of execution of each module shown in Figure 4 and achieve the same technical effect. To avoid repetition, it will not be described here.

[0346] An embodiment of the present application also provides a readable storage medium, on which a program or instruction is stored. When the program or instruction is executed by a processor, the various processes of the above-mentioned CP parameter determination method embodiment are implemented, and the same technical effect can be achieved. To avoid repetition, it will not be repeated here.

[0347] The processor is the processor in the terminal described in the above embodiment. The readable storage medium includes a computer-readable storage medium, such as a computer read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk. In some examples, the readable storage medium may be a non-transitory readable storage medium.

[0348] An embodiment of the present application further provides a chip, which includes a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run programs or instructions to implement the various processes of the above-mentioned CP parameter determination method embodiment, and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0349] It should be understood that the chip mentioned in the embodiments of the present application can also be called a system-level chip, a system chip, a chip system or a system-on-chip chip, etc.

[0350] An embodiment of the present application further 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-mentioned CP parameter determination method embodiment, and can achieve the same technical effects. To avoid repetition, it is not repeated here.

[0351] An embodiment of the present application further provides a communication system, including: a terminal and a network-side device, wherein the terminal can be used to execute the steps of the CP parameter determination method described above, and the network-side device can be used to execute the steps of the CP parameter determination method described above.

[0352] It should be noted that, in this article, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in the opposite order according to the functions involved. For example, the described method may be performed in an order different from that described, and various steps may also be added, omitted or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0353] Through the description of the above embodiments, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of a computer software product plus a necessary general-purpose hardware platform, or of course, by hardware. The computer software product is stored in a storage medium (such as ROM, RAM, magnetic disk, optical disk, etc.) and includes a number of instructions for enabling a terminal or network-side device to execute the methods described in each embodiment of the present application.

[0354] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of this application, ordinary technicians in this field can also make many forms of implementation methods without departing from the purpose of this application and the scope of protection of the claims. These implementation methods are all within the protection of this application.

Claims

1. A method for determining a cyclic prefix (CP) parameter, comprising: The communication device determines, based on first information, a CP parameter corresponding to a target object, where a CP length of the target object is related to the CP parameter, the first information including at least one of: a transmission mode of the target object, a transmission parameter of the target object, relevant information of a reference object, target information, and a preset association relationship; The communication device transmits the target object according to the CP length of the target object; The target object includes at least one of system information SI, system information block SIB, a downlink control channel for scheduling SI or SIB, and a downlink shared channel for carrying SI or SIB; The reference object includes at least one of SI, SIB, synchronization signal block SSB, broadcast signal, downlink control channel, and downlink shared channel transmitted before the target object; The target information includes information for indicating the target object, or the target information includes information for requesting the target object; The preset association relationship includes an association relationship between each object of at least one object and a CP parameter, and the at least one object includes at least one of the target object and the reference object.

2. The method according to claim 1, wherein The communication device determines, based on the first information, a CP parameter corresponding to the target object, including at least one of the following: In a case where the transmission mode of the target object is broadcast transmission, the communication device determines a preset first CP parameter as the CP parameter corresponding to the target object; In the case where the transmission mode of the target object is on-demand transmission, the communication device determines the CP parameter corresponding to the target object based on the transmission parameter of the target object, the relevant information of the reference object, the target information and at least one of the preset association relationship.

3. The method according to claim 1 or 2, wherein: The transmission parameters of the target object include at least one of the following: The subcarrier spacing SCS of the target object; The minimum bandwidth of the target object; The temporal location of the target object; The frequency domain position of the target object; Relevant parameters of the control resource set CORESET of the target object; Related parameters of the search space of the target object.

4. The method according to any one of claims 1 to 3, wherein The first information includes at least one of a transmission parameter of the target object and relevant information of the reference object; The communication device determines, based on the first information, a CP parameter corresponding to the target object, including at least one of the following: The communication device determines a target CP parameter as a CP parameter corresponding to the target object, where the target CP parameter is a CP parameter corresponding to the reference object, and the relevant information of the reference object includes the target CP parameter; The communication device determines, based on the transmission parameters of the reference object, a CP parameter corresponding to the target object, where the relevant information of the reference object includes the transmission parameters of the reference object; The communication device determines, based on the transmission parameters of the target object and the transmission parameters of the reference object, a CP parameter corresponding to the target object, wherein the relevant information of the reference object includes the transmission parameters of the reference object; The communication device determines, according to a relative relationship between the transmission parameters of the target object and the transmission parameters of the reference object, a CP parameter corresponding to the target object, wherein the relevant information of the reference object includes the transmission parameters of the reference object; The communication device determines a CP parameter corresponding to the target object according to a multiplexing mode of the target object and the reference object, where the relevant information of the reference object includes the multiplexing mode of the target object and the reference object.

5. The method according to claim 4, wherein The transmission parameters of the reference object include at least one of the following: the SCS of the reference object; the minimum bandwidth of the reference object; The frequency domain position of the reference object; The temporal position of the reference object; Related parameters of the CORESET of the reference object; Related parameters of the search space of the reference object; or, The relative relationship between the transmission parameters of the target object and the transmission parameters of the reference object includes at least one of the following: The size relationship between the SCS of the target object and the SCS of the reference object; The frequency domain position relationship of the target object relative to the reference object; The temporal position relationship of the target object relative to the reference object.

6. The method according to claim 5, wherein: The communication device determines, according to a relative relationship between the transmission parameter of the target object and the transmission parameter of the reference object, a CP parameter corresponding to the target object, including at least one of the following: In a case where the SCS of the target object is equal to the SCS of the reference object, the communication device determines the target CP parameter as the CP parameter corresponding to the target object; When the SCS of the target object is greater than the SCS of the reference object, the communication device determines the second CP parameter as the CP parameter corresponding to the target object, and the CP length corresponding to the second CP parameter is greater than or equal to the CP length corresponding to the target CP parameter, or the ratio of the CP length corresponding to the second CP parameter to the length of the time domain signal is greater than or equal to the ratio of the CP length corresponding to the target CP parameter to the length of the time domain signal; When the SCS of the target object is smaller than the SCS of the reference object, the communication device determines the third CP parameter as the CP parameter corresponding to the target object, and the CP length corresponding to the third CP parameter is smaller than or equal to the CP length corresponding to the target CP parameter, or the ratio of the CP length corresponding to the third CP parameter to the length of the time domain signal is smaller than or equal to the ratio of the CP length corresponding to the target CP parameter to the length of the time domain signal.

7. The method according to claim 5, wherein: The communication device determines, according to a relative relationship between the transmission parameter of the target object and the transmission parameter of the reference object, a CP parameter corresponding to the target object, including at least one of the following: In a case where the target object and the reference object are located at the same frequency domain position, the communication device determines the target CP parameter as the CP parameter corresponding to the target object; In a case where the frequency domain position of the target object is within the frequency domain range of the reference object, the communication device determines the target CP parameter as the CP parameter corresponding to the target object; In a case where a frequency domain interval between the target object and the reference object is smaller than a first threshold, the communication device determines the target CP parameter as the CP parameter corresponding to the target object.

8. The method according to claim 4, wherein: The communication device determines, according to a multiplexing mode of the target object and the reference object, a CP parameter corresponding to the target object, including: In a case where the multiplexing mode of the target object and the reference object is frequency division multiplexing, the communication device determines the target CP parameter as the CP parameter corresponding to the target object.

9. The method according to any one of claims 1 to 8, wherein The reference object is the SSB selected by the terminal; or The reference object is an object used to schedule the target object; or The reference object is an object used to carry the target object.

10. The method according to any one of claims 1 to 9, wherein The first information includes the target information, and the target information includes CP parameter related information; The communication device determines, based on the first information, a CP parameter corresponding to the target object, including: The communication device determines the CP parameter corresponding to the CP parameter-related information as the CP parameter corresponding to the target object.

11. The method according to claim 10, wherein: The CP parameter related information includes at least one of the following: CP type information; CP length information; Joint coding information carrying CP type information; Jointly coded information carrying CP length information; Index indication information, where the index indication information is associated with the CP parameter.

12. The method according to any one of claims 1 to 11, wherein The target object includes at least one of a first target object and a second target object, the first target object is a target object of a serving cell, and the second target object is a target object of a neighboring cell; The target information includes at least one of the following: Information indicating the first target object; Information indicating the second target object; Used to request information about the first target object; Used to request information about the second target object.

13. The method according to any one of claims 1 to 12, wherein The target information includes at least one of the following: Neighboring cell measurement information sent by the network device to the terminal for cell selection or reselection; Configuration information for the secondary cell (Scell) sent by the network side device to the terminal; Configuration information for on-demand signaling sent by the network side device to the terminal; A wake-up signal WUS is sent by the network side device to the terminal; The terminal sends a request signal to the network side device; WUS sent by the terminal to the network-side device.

14. The method according to any one of claims 1 to 13, wherein The at least one object includes at least one of the following: At least one SSB type; SIBx corresponding to each SSB type of at least one SSB type, where x in SIBx is a natural number; At least one SSB type and a corresponding CORESET for each SSB type.

15. A cyclic prefix (CP) parameter determination device, comprising: a first processing unit, configured to determine a CP parameter corresponding to a target object based on first information, where a CP length of the target object is related to the CP parameter, the first information including at least one of: a transmission mode of the target object, a transmission parameter of the target object, relevant information of a reference object, target information, and a preset association relationship; a second processing unit, configured to transmit the target object according to the CP length of the target object; The target object includes at least one of system information SI, system information block SIB, a downlink control channel for scheduling SI or SIB, and a downlink shared channel for carrying SI or SIB; The reference object includes at least one of SI, SIB, synchronization signal block SSB, broadcast signal, downlink control channel, and downlink shared channel transmitted before the target object; The target information includes information for indicating the target object, or the target information includes information for requesting the target object; The preset association relationship includes an association relationship between each object of at least one object and a CP parameter, and the at least one object includes at least one of the target object and the reference object.

16. The device according to claim 15, wherein The first processing unit includes at least one of the following: A first processing subunit is configured to, when the transmission mode of the target object is broadcast transmission, determine a preset first CP parameter as a CP parameter corresponding to the target object; The first processing sub-unit is used to determine the CP parameter corresponding to the target object based on the transmission parameter of the target object, the relevant information of the reference object, the target information and at least one of the preset association relationship when the transmission mode of the target object is on-demand transmission.

17. The device according to claim 15 or 16, wherein The first information includes at least one of a transmission parameter of the target object and relevant information of the reference object; The first processing unit includes at least one of the following: a third processing subunit, configured to determine a target CP parameter as a CP parameter corresponding to the target object, wherein the target CP parameter is a CP parameter corresponding to the reference object, and the relevant information of the reference object includes the target CP parameter; a fourth processing subunit, configured to determine a CP parameter corresponding to the target object according to the transmission parameter of the target object and the transmission parameter of the reference object, wherein the relevant information of the reference object includes the transmission parameter of the reference object; a fifth processing subunit, configured to determine a CP parameter corresponding to the target object according to the transmission parameter of the reference object, wherein the relevant information of the reference object includes the transmission parameter of the reference object; a sixth processing subunit, configured to determine a CP parameter corresponding to the target object according to a relative relationship between the transmission parameter of the target object and the transmission parameter of the reference object, wherein the relevant information of the reference object includes the transmission parameter of the reference object; The seventh processing subunit is configured to determine a CP parameter corresponding to the target object according to a multiplexing mode of the target object and the reference object, wherein the relevant information of the reference object includes the multiplexing mode of the target object and the reference object.

18. The device according to claim 17, wherein The sixth processing subunit is specifically configured to: When the SCS of the target object is equal to the SCS of the reference object, determining the target CP parameter as the CP parameter corresponding to the target object; When the SCS of the target object is greater than the SCS of the reference object, a second CP parameter is determined as the CP parameter corresponding to the target object, and a CP length corresponding to the second CP parameter is greater than or equal to the CP length corresponding to the target CP parameter, or a ratio of the CP length corresponding to the second CP parameter to the length of the time domain signal is greater than or equal to the ratio of the CP length corresponding to the target CP parameter to the length of the time domain signal; When the SCS of the target object is smaller than the SCS of the reference object, a third CP parameter is determined as the CP parameter corresponding to the target object, and a CP length corresponding to the third CP parameter is less than or equal to the CP length corresponding to the target CP parameter, or a ratio of the CP length corresponding to the third CP parameter to the length of the time domain signal is less than or equal to the ratio of the CP length corresponding to the target CP parameter to the length of the time domain signal; In a case where the target object and the reference object are located at the same frequency domain position, determining the target CP parameter as the CP parameter corresponding to the target object; In a case where the frequency domain position of the target object is within the frequency domain range of the reference object, determining the target CP parameter as the CP parameter corresponding to the target object; In a case where the frequency domain interval between the target object and the reference object is smaller than a first threshold, the target CP parameter is determined as the CP parameter corresponding to the target object.

19. The device according to claim 17, wherein The seventh processing subunit is specifically configured to: In a case where the multiplexing mode of the target object and the reference object is frequency division multiplexing, the target CP parameter is determined to be the CP parameter corresponding to the target object.

20. The device according to any one of claims 15 to 19, wherein The first information includes the target information, and the target information includes CP parameter related information; The first processing unit includes: An eighth processing sub-unit is configured to determine the CP parameter corresponding to the CP parameter-related information as the CP parameter corresponding to the target object.

21. The device according to any one of claims 15 to 20, wherein The target information includes at least one of the following: Neighboring cell measurement information sent by the network device to the terminal for cell selection or reselection; Configuration information for the secondary cell (Scell) sent by the network side device to the terminal; Configuration information for on-demand signaling sent by the network side device to the terminal; A wake-up signal WUS is sent by the network side device to the terminal; The terminal sends a request signal to the network side device; WUS sent by the terminal to the network-side device.

22. A communication device comprising a processor and a memory, wherein the memory stores a program or instruction executable on the processor, and when the program or instruction is executed by the processor, the steps of the method for determining a cyclic prefix (CP) parameter according to any one of claims 1 to 14 are implemented.

23. A readable storage medium storing a program or instruction, wherein the program or instruction, when executed by a processor, implements the steps of the method for determining a cyclic prefix (CP) parameter according to any one of claims 1 to 14.

24. A computer program product comprising computer instructions, wherein when the computer instructions are executed by a processor, the steps of the method for determining a cyclic prefix (CP) parameter according to any one of claims 1 to 14 are implemented.

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