Method, device and storage medium for determining protection interval

Abstract

The embodiments of the present application provide a method, device and storage medium for determining a guard interval, which are used to improve the transmission performance of a system channel. The method includes: according to the channel transmission conditions at the junction of two consecutive time units, selecting N consecutive symbols from the junction of two time units as a guard interval, the symbols on both sides of the guard interval belong to different time units, and the time units on both sides correspond to different frequency domain subbands, where N is a positive integer. The guard interval determined by the above method has the least impact on the transmission performance of the system channel, ensuring the transmission performance of the system during the frequency subband retuning.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of communication technology, and in particular, to a method, device and storage medium for determining a protection interval. Background Art

[0002] The New Radio (NR) system mainly supports Enhanced Mobile Broadband (eMBB) services to meet the requirements of high speed, high spectrum efficiency, and large bandwidth. In practical applications, in addition to eMBB services, there are many other types of services, such as data transmission services for industrial IoT sensors, surveillance cameras, and wearable devices. The terminals that support these services have the characteristics of large number of connections, low power consumption, and low cost. Compared with terminals that support eMBB services, the hardware capabilities are reduced, such as reduced supported bandwidth, reduced processing speed, and reduced number of antennas. Therefore, it is necessary to optimize the NR system for low-capability terminals that support the above other types of services, and the corresponding system is called the NR-light system.

[0003] In order to improve the performance of channel transmission, the NR system considers using frequency hopping for channel transmission, that is, the bandwidth of the channel resources in different time units can be different. Accordingly, the terminal needs to retun the receiver bandwidth from one bandwidth to another. During the retuning period, the terminal cannot receive or send channels, which will affect the transmission performance of the system channel. Summary of the invention

[0004] The embodiments of the present application provide a method, device and storage medium for determining a protection interval to ensure the transmission performance of a system channel.

[0005] In the first aspect, an embodiment of the present application provides a method for determining a protection interval, comprising: determining N symbols in a first symbol set as a protection interval according to the channel reception status of symbols in the first symbol set; the symbols in the first symbol set belong to the end of a first time unit and the beginning of a second time unit, the first time unit and the second time unit are two continuous time units in the time domain, the first time unit and the second time unit correspond to different frequency domain subbands, and the number of symbols in the first symbol set is greater than N, where N is a positive integer.

[0006] In the second aspect, an embodiment of the present application provides a method for determining a protection interval, including: determining N symbols in a first symbol set as a protection interval according to a preset channel transmission status of symbols in the first symbol set; the symbols in the first symbol set belong to the end of a first time unit and the beginning of a second time unit, the first time unit and the second time unit are two continuous time units in the time domain, the first time unit and the second time unit correspond to different frequency domain subbands, and the number of symbols in the first symbol set is greater than N, where N is a positive integer.

[0007] In the third aspect, an embodiment of the present application provides a terminal device, including: a processing module, used to determine that N symbols in the first symbol set are protection intervals according to the channel reception status of the symbols in the first symbol set; the symbols in the first symbol set belong to the end of the first time unit and the beginning of the second time unit, the first time unit and the second time unit are two continuous time units in the time domain, the first time unit and the second time unit correspond to different frequency domain subbands, and the number of symbols in the first symbol set is greater than N, where N is a positive integer.

[0008] In a fourth aspect, an embodiment of the present application provides a network device, comprising: a processing module, used to determine that N symbols in the first symbol set are protection intervals according to the preset channel transmission status of the symbols in the first symbol set; the symbols in the first symbol set belong to the end of the first time unit and the beginning of the second time unit, the first time unit and the second time unit are two continuous time units in the time domain, the first time unit and the second time unit correspond to different frequency domain subbands, and the number of symbols in the first symbol set is greater than N, where N is a positive integer.

[0009] In a fifth aspect, an embodiment of the present application provides a terminal device, comprising: a transceiver, a processor, and a memory; the memory stores computer-executable instructions; the processor executes the computer-executable instructions stored in the memory, so that the processor executes the method described in the first aspect. In one implementation, the processor may be a chip.

[0010] In a sixth aspect, an embodiment of the present application provides a network device, comprising: a transceiver, a processor, and a memory; the memory stores computer-executable instructions; the processor executes the computer-executable instructions stored in the memory, so that the processor executes the method as described in the second aspect. In one implementation, the processor may be a chip.

[0011] In a seventh aspect, an embodiment of the present application provides a computer-readable storage medium, wherein the computer-readable storage medium stores computer-executable instructions, which, when executed by a processor, are used to implement the method described in the first aspect.

[0012] In an eighth aspect, an embodiment of the present application provides a computer-readable storage medium, wherein the computer-readable storage medium stores computer-executable instructions, which, when executed by a processor, are used to implement the method described in the second aspect.

[0013] The embodiments of the present application provide a method, device and storage medium for determining a guard interval, which are used to improve the transmission performance of a system channel. The method includes: according to the channel transmission conditions at the junction of two consecutive time units, selecting N consecutive symbols from the junction of two time units as a guard interval, the symbols on both sides of the guard interval belong to different time units, and the time units on both sides correspond to different frequency domain subbands, where N is a positive integer. The guard interval determined by the above method has the least impact on the transmission performance of the system channel, ensuring the transmission performance of the system during the frequency subband retuning. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A schematic diagram of the structure of a communication system provided in an embodiment of the present application;

[0015] Figure 2 A flowchart of a method for determining a protection interval provided in an embodiment of the present application;

[0016] Figure 3 A schematic diagram of the positions of the guard interval, the first time unit and the second time unit in the time domain provided in an embodiment of the present application;

[0017] Figure 4 A schematic diagram of symbol distribution at the junction of time units provided in an embodiment of the present application;

[0018] Figure 5 A schematic diagram of symbol distribution at the junction of time units provided in an embodiment of the present application;

[0019] Figure 6 A schematic diagram of symbol distribution at the junction of time units provided in an embodiment of the present application;

[0020] Figure 7 A schematic diagram of symbol distribution at the junction of time units provided in an embodiment of the present application;

[0021] Figure 8 A schematic diagram of symbol distribution at the junction of time units provided in an embodiment of the present application;

[0022] Fig. 9A schematic diagram of symbol distribution at the junction of time units provided in an embodiment of the present application;

[0023] Fig.10 A schematic diagram of symbol distribution at the junction of time units provided in an embodiment of the present application;

[0024] Fig.11 A schematic diagram of symbol distribution at the junction of time units provided in an embodiment of the present application;

[0025] Fig.12 A schematic diagram of symbol distribution at the junction of time units provided in an embodiment of the present application;

[0026] Fig.13 A schematic diagram of symbol distribution at the junction of time units provided in an embodiment of the present application;

[0027] Fig.14 A schematic diagram of symbol distribution at the junction of time units provided in an embodiment of the present application;

[0028] Fig.15 A schematic diagram of symbol distribution at the junction of time units provided in an embodiment of the present application;

[0029] Fig.16 A schematic diagram of symbol distribution at the junction of time units provided in an embodiment of the present application;

[0030] Fig.17 A schematic diagram of symbol distribution at the junction of time units provided in an embodiment of the present application;

[0031] Fig.18 A schematic diagram of symbol distribution at the junction of time units provided in an embodiment of the present application;

[0032] Fig.19 A schematic diagram of symbol distribution at the junction of time units provided in an embodiment of the present application;

[0033] Fig. 20 A schematic diagram of symbol distribution at the junction of time units provided in an embodiment of the present application;

[0034] Fig.21 A flowchart of a method for determining a protection interval provided in an embodiment of the present application;

[0035] Fig. 22 A schematic diagram of the structure of a terminal device provided in an embodiment of the present application;

[0036] Fig.23 A schematic diagram of the structure of a network device provided in an embodiment of the present application;

[0037] Fig.24A schematic diagram of the hardware structure of a terminal device provided in an embodiment of the present application;

[0038] Fig.25 A schematic diagram of the hardware structure of a network device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0040] The terms "first", "second", etc. in the specification, claims and the above-mentioned drawings of the embodiments of the present application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in a sequence other than illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, the process, method, system, product or equipment comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or equipment.

[0041] In the NR system, the synchronization signal (SS) and the physical broadcast channel (PBCH) block appear in the form of SS / PBCH resource blocks according to a certain time-frequency domain resource relationship, referred to as the synchronization signal block (SSB). SSB may include at least one of PBCH, primary synchronization signal (PSS), and secondary synchronization signal (SSS).

[0042] The network device can send a series of SSBs (or SSB sets) in different beam directions, such as SSB1, SSB2, SSB3, etc., that is, the network device covers the entire cell through multi-beam scanning to facilitate reception by terminal devices in the cell. The channel that carries SSB information is PBCH, which is used to carry the main information block (MIB). The terminal device can obtain the control resource set CORESET information of type0 PDCCH from the pdcch-ConfigSIB1 field of the MIB information. The CORESET information is used to indicate the resource block RB of type0 PDCCH in the frequency domain and the number of OFDM symbols in the time domain. The terminal device can also obtain the search space information of type0 PDCCH from the pdcch-ConfigSIB1 field of the MIB information. The search space information is used to determine the monitoring time of type0 PDCCH. The search space information includes the starting OFDM symbol number of type0 PDCCH and the monitoring period.

[0043] After receiving the SSB, the terminal device can achieve time synchronization with the network device and obtain the basic configuration information of the network. In addition, the terminal device needs to obtain some necessary system information to complete the cell residence and initial access. These necessary system information are called RMSI (Remaining Minimum System Information) in NR. RMSI can be considered as the SIB1 (System Information Block 1) message in LTE, which is mainly sent through the Physical Down Link Shared Channel (PDSCH), and the PDSCH channel requires the downlink control information (Downlink Control Information, DCI) of the Physical Down Link Control Channel (PDCCH) to schedule. The terminal device can obtain the PDCCH channel information for scheduling RMSI from the pdcch-ConfigSIB1 field of the MIB information, perform blind detection on the PDCCH, and obtain RMSI, that is, the SIB1 message.

[0044] The NR system is mainly designed to support eMBB services, and its main technology is to meet the needs of high speed, high spectrum efficiency, and large bandwidth. In fact, in addition to eMBB, there are many different types of services, such as sensor networks, video surveillance, wearables, etc., which have different requirements from eMBB services in terms of speed, bandwidth, power consumption, cost, etc. The capabilities of terminals supporting these services are reduced compared to those supporting eMBB, such as reduced supported bandwidth, relaxed processing time, and reduced number of antennas. In order to better support other types of services in addition to eMBB services, the NR system needs to be optimized for these services and corresponding low-capability terminals. Such a system is called an NR-light system.

[0045] In the NR-light system, low-capability terminals support limited bandwidth, so the bandwidth of the CORESET of the type0PDCCH indicated by the network side is relatively narrow. In order to ensure the reception performance of type0 PDCCH, repeated transmission in the time domain is usually adopted, that is, type0 PDCCH is sent in multiple time units. Then, the monitoring timing of type0 PDCCH corresponding to each indexed SSB may require more time units, resulting in the occupation of a large number of downlink subframes, causing delays in receiving SIB1. In this regard, frequency hopping can be used to make the bandwidth of the CORESET of type0 PDCCH corresponding to a certain indexed SSB change in different time units, that is, readjust from one bandwidth to another, so that the terminal can detect type0 PDCCH on the bandwidth of different CORESETs in the same time unit, reducing the delay of the terminal receiving SIB1. In the related art, the SSBs in different beam directions (or SSBs with different indexes) usually indicate the same CORESET information of the type0 PDCCH. Through the above-mentioned frequency hopping method, the CORESET information corresponding to at least two SSBs with different indexes is not exactly the same, so that the terminal can receive the channel on the bandwidth of different CORESETs in the same time unit, thereby improving the terminal's ability to receive the channel.

[0046] The above frequency hopping method requires the terminal to retun the receiver bandwidth from one bandwidth to another. During the retuning period, the terminal cannot receive and send channels, which will affect the transmission performance of the system channel. Since the time domain resource configuration of the control channel in the NR system is relatively flexible, under different control channel resource configurations, corresponding protection intervals need to be defined to ensure the transmission performance of the NR-Light system.

[0047] In this regard, an embodiment of the present application provides a method for determining a guard interval, taking into account that the above-mentioned bandwidth re-adjustment (or frequency sub-band re-adjustment) occurs at the boundary of two consecutive time units (such as the first time unit and the second time unit), and the bandwidths of the two consecutive time units are different, the guard interval is determined from the boundary of the two consecutive time units based on the channel transmission conditions of the symbols at the boundary of the two time units. The guard interval of the embodiment of the present application can be one symbol, or multiple consecutive symbols, wherein the symbol on the left side of the guard interval belongs to the first time unit, and the symbol on the right side of the guard interval belongs to the second time unit.

[0048] Figure 1 This is a schematic diagram of the structure of a communication system provided in an embodiment of the present application. Figure 1 As shown, the communication system includes a network device and a plurality of terminal devices connected to the network device for communication, such as Figure 1 UE1 to UE6 are shown. Among them, the network device can be a base station (Base station, BS), and the base station can be a multi-beam base station or a single-beam base station. The terminal device can be a fixed terminal device or a mobile terminal device. The base station and UE1 to UE6 form a communication system, in which the base station can send a series of SSBs in a beam scanning manner, so that one or more UEs among UE1 to UE6 can determine the CORESET information and search space information corresponding to at least one SSB according to at least one SSB received, so as to perform PDCCH detection and receive downlink data on the PDSCH scheduled by the PDCCH DCI, such as the system message SIB1.

[0049] The technical solution of the embodiment of the present application is mainly applied to communication systems based on NR technology, such as the fifth generation mobile communication technology (5th generation mobile networks, referred to as 5G) communication system, NR-light system, etc. It can also be applied to other communication systems, as long as there is an entity in the communication system that needs to indicate communication with another entity, and the other entity needs to interpret the advance data transmission in some way, for example, it can be applied to the scheduling of multiple data blocks between network equipment and terminal equipment, or two terminal equipment, one of which assumes the function of accessing the network, etc. Specifically, the communication system can be, for example: Global System of Mobile communication (GSM) system, Code Division Multiple Access (CDMA) system, Wideband Code Division Multiple Access (WCDMA) system, General Packet Radio Service (GPRS) system, Long Term Evolution (LTE) system, advanced Long Term Evolution LTE-A (LTE Advanced) system, LTE Frequency Division Duplex (FDD) system, LTE Time Division Duplex (TDD) system, Universal Mobile Telecommunication System (UMTS), etc.

[0050] The terminal device referred to in the technical solution of the embodiment of the present application can be a wireless terminal or a wired terminal. The wireless terminal can be a device that provides voice and / or other business data connectivity to users, a handheld device with a wireless connection function, or other processing devices connected to a wireless modem. The wireless terminal can communicate with one or more core networks via a radio access network (Radio Access Network, referred to as RAN). The wireless terminal can be a mobile terminal, such as a mobile phone (or "cellular" phone) and a computer with a mobile terminal. For example, it can be a portable, pocket-sized, handheld, computer-built-in or vehicle-mounted mobile device that exchanges language and / or data with the radio access network. For example, Personal Communication Service (PCS) phones, cordless phones, Session Initiation Protocol (SIP) phones, Wireless Local Loop (WLL) stations, Personal Digital Assistants (PDA) and other devices. A wireless terminal may also be referred to as a system, a subscriber unit, a subscriber station, a mobile station, a mobile station, a remote station, a remote terminal, an access terminal, a user terminal, a user agent, or a user device or user equipment, without limitation herein.

[0051] The network device referred to in the technical solution of the embodiment of the present application is a device deployed in a wireless access network to provide wireless communication functions, which can be a base station (Base Transceiver Station, BTS) in Global System of Mobile communication (GSM) or Code Division Multiple Access (CDMA), or a base station (NodeB, NB) in Wideband Code Division Multiple Access (WCDMA), or an evolved base station (Evolutional Node B, eNB or eNodeB) in LTE, or a relay station or access point, or a transmission reception point (TRP) or next generation node B (generation nodeB, gNB) in a new air interface NR network, or base stations in other future network systems, etc., are not limited here.

[0052] The network device of the embodiment of the present application can indicate the CORESET information and search space information of the PDCCH through MIB information. The terminal device detects the PDCCH in the CORESET and search space of the PDCCH indicated by the network device.

[0053] In practical applications, the above CORESET information can be obtained by indicating any index in Table 1 in the pdcch-ConfigSIB1 field of the MIB to determine the number of RBs, the number of symbols, and the RB offset value compared to the SSB of the CORESET corresponding to the index.

[0054] It should be noted that Table 1 below shows the case where the subcarrier spacing is 15kHz, the bandwidth of CORESET can be configured as 24, 48, 96 RBs, the number of symbols of CORESET can be 1, 2, 3, and the number of RBs by which the frequency domain position of CORESET is offset from the frequency domain position of SSB can be 0, 2, 4, 12, 16, 38. The multiplexing method of SSB and CORESET in Table 1 is method 1, that is, PDCCH and SSB adopt time division multiplexing. Of course, the multiplexing method of SSB and CORESET can also be method 2 (PDCCH and SSB adopt frequency division and time division multiplexing) or method 3 (PDCCH and SSB adopt frequency division multiplexing). Table 1 is only an example, and for different subcarrier spacings or different multiplexing methods, the corresponding table content is different.

[0055] In practical applications, the pdcch-ConfigSIB1 field of the above MIB also indicates the search space information of the type0 PDCCH, which can be used to determine the monitoring timing of the type0 PDCCH (ie, the starting OFDM symbol number).

[0056] The monitoring timing of type0 PDCCH is determined by the following method:

[0057] For the multiplexing mode of SSB and CORESET, mode 1 is used. The UE monitors the type0 PDCCH common search space in two consecutive time slots. The starting time slot in the two consecutive time slots is numbered n0. Each indexed SSB corresponds to a monitoring window. The number n0 of the starting time slot of the monitoring window can be determined by formula 1:

[0058]

[0059] Where i is the index of the SSB, μ is the system parameter related to the subcarrier spacing Δf, is the number of time slots in a radio frame. Both M and O are indicated by the Searchspace information in the PBCH. The values ​​of O include {0,2,5,7} in the frequency domain below 6 GHz (frequency range 1) and {0,2.5,5,7.5} in the frequency domain above 6 GHz (frequency range 2). The values ​​of M include {1 / 2,1,2}.

[0060] Taking frequency range 1 as an example, the Searchspace 0 indication information is shown in Table 2 below. By indicating any index in Table 2 in the pdcch-ConfigSIB1 field of the MIB, the O, M, the number of search space sets per slot, and the first symbol index corresponding to the index can be determined. The i in Table 2 represents the index number of the SSB. For example, when the index is 1, if the index number of the SSB is an even number, the first symbol index of the search space is 0. If the index number of the SSB is an odd number, the first symbol index of the search space is Indicates the number of symbols contained in a CORESET.

[0061] After determining the number of the starting time slot n0, it is necessary to further determine the radio frame number SFN where the listening window is located. C , can be determined by formula 2 or 3:

[0062]

[0063]

[0064] That is, if The calculated number of time slots is less than the number of time slots contained in a wireless frame, SFN C For an even-numbered radio frame, if The calculated number of time slots is greater than or equal to the number of time slots contained in a wireless frame, SFN C Odd-numbered radio frames.

[0065] In the embodiment of the present application, the pdcch-ConfigSIB1 field of the MIB information carried by the PBCH of the SSB contains 8 bits, and the CORESET information and Searchspace information of the type0 PDCCH each occupy 4 bits. The CORESET information carried by the PBCH of SSBs with different indexes can be the same or different, wherein the CORESET information carried by the PBCH of SSBs with different indexes is different, that is, the MIB information corresponding to SSBs with different indexes is different.

[0066] The value range of i is [0, L-1], where L is the maximum number of SSBs corresponding to the frequency band where the SSB is located. The maximum number of SSBs L has the following relationship with the frequency band of the system: if the frequency range is less than or equal to 3GHz, L is 4; if the frequency range is greater than 3GHz and less than 6GHz, L is 8; if the frequency range is greater than or equal to 6GHz and less than 52.6GHz, L is 64. The index number of the SSB can be indicated by the demodulation reference signal (DMRS) of the PBCH or the information carried by the PBCH.

[0067] Table 1

[0068]

[0069] Table 2

[0070]

[0071]

[0072] It should be noted that, in addition to indicating the CORESET information and search space information of the PDCCH through the above-mentioned MIB information, the network device in the embodiment of the present application can also configure the CORESET information and search space information of the PDCCH through the system message SIB1 or radio resource control (Radio Resource Control, RRC) signaling.

[0073] The configuration information of the search space includes the following information:

[0074] (1) Search space ID

[0075] (2) The identifier of the control resource set (controlResourceSetId) indicates the configuration ID of the control resource set and configures the time and frequency resources of the PDCCH search space.

[0076] (3) The period of the monitored time slot and the offset within the period. Currently, NR supports periods of 1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 160, 320, 640, 1280, and 2560 time slots.

[0077] (4) Duration indicates the number of time slots monitored continuously within the PDCCH search space period.

[0078] (5) monitoringSymbolsWithinSlot indicates which symbols within the PDCCH monitoring time slot are used for PDCCH monitoring.

[0079] (6)PDCCH candidates indicates the configuration information of PDCCH candidates.

[0080] (7) Type of search space: common search space or UE-specific search space.

[0081] The configuration information of CORESET includes the following information:

[0082] (1) Identification of the control resource set: The number of the CORESET, ranging from 1 to 11, CORESET 0 is the CORESET indicated in the broadcast message.

[0083] (2)frequencyDomainResources: CORESET frequency domain resources, indicating the RBs included in CORESET.

[0084] (3) duration: the number of consecutive symbols contained in CORESET, with a value range of {1, 2, 3}.

[0085] (4) cce-REG-MappingType: can be configured as interleaved mapping or non-interleaved mapping.

[0086] (5) precoderGranularity: indicates whether the precoding granularity of DMRS is wideband precoding or narrowband precoding.

[0087] When the network device of the embodiment of the present application schedules downlink data transmission through the DCI (DCI format 1_0 or DCIformat 1_1) of the downlink authorization (DL grant), the scheduling information of the PDSCH will be carried in the DCI, including time domain and frequency domain resource allocation information. Among them, the time domain resource allocation information is indicated by the TimeDomainResourceAllocation (TDRA) field. Table 3 shows the default table corresponding to the TDRA indication field, which is used to determine the meaning of the TDRA indication field in the DCI carried in the type0 PDCCH. When the terminal device detects the type0 PDCCH and obtains the TDRA information, the SLIV corresponding to the TDRA is determined according to Table 3. The indication field contains 4 bits, which can indicate 16 different rows in a resource allocation table, such as the 16 row indexes shown in Table 4. Each row contains different resource allocation combinations, such as the starting symbol S of the PDSCH, the length L, K0 and different types (type), etc. Among them, K0 represents the number of offset time slots between the time slot where the DCI is located and the time slot where the PDSCH is located.

[0088] Table 3

[0089]

[0090]

[0091] In the NR system, the starting symbol and length of PDSCH are no longer fixed. Instead, the starting symbol S and length L of PDSCH in the scheduling time slot are indicated by TDRA in DCI. The values ​​of S and L are not arbitrary, but are jointly coded to form a SLIV value (the start and length indicator). The possible values ​​in one implementation are shown in Table 4. In Table 4, there are two ways of time domain resource allocation: Type A and Type B. The candidate values ​​of S and L corresponding to Type A and Type B are different. Type A is mainly for slot-based services, S is relatively forward, and L is relatively long. Type B is mainly for URLLC services, which have higher latency requirements, so the position of S is relatively arbitrary to facilitate the transmission of URLLC services that arrive at any time, and L is shorter, which can reduce transmission latency.

[0092] Table 4

[0093]

[0094] Based on the above communication system, the technical solution of the present application is described in detail with several specific embodiments in combination with the accompanying drawings. The following specific embodiments can be combined with each other, and the same or similar concepts or processes are not repeated in some embodiments.

[0095] Figure 2 A flowchart of a method for determining a protection interval provided in an embodiment of the present application. Figure 2 As shown, the method provided in this embodiment can be applied to Figure 1 For any UE shown in FIG. 1 , the method comprises the following steps:

[0096] Step 101: Determine, according to channel reception conditions of symbols in a first symbol set, that N symbols in a first symbol set are guard intervals.

[0097] In an embodiment of the present application, the symbols in the first symbol set belong to the symbols at the end of the first time unit and the beginning of the second time unit. The first time unit and the second time unit are two continuous time units in the time domain, with the first time unit in front and the second time unit in the back. The first time unit and the second time unit correspond to different frequency domain subbands, and the number of symbols in the first symbol set is greater than N, where N is a positive integer. It should be noted that the time unit in the embodiment of the present application may be a wireless frame, a subframe, a time slot, etc., and the embodiment of the present application does not impose any restrictions on this.

[0098] The symbols in the first symbol set in the embodiment of the present application can be understood as the symbols at the junction of the first time unit and the second time unit. As an example, assuming that the number of symbols N in the protection interval is 1, the UE can select a symbol from the two symbols at the junction of the first time unit and the second time unit, where the two symbols at the junction can be the last symbol at the end of the first time unit and the first symbol at the beginning of the second time unit. As another example, assuming that the number of symbols in the protection interval is 2, the UE can select four symbols from the junction of the first time unit and the second time unit, where the four symbols at the junction can be the last two symbols at the end of the first time unit and the first two symbols at the beginning of the second time unit.

[0099] In the embodiment of the present application, the channel reception status of the symbols in the first symbol set includes: receiving PDSCH, receiving PDCCH, or not receiving at least one of the channels. That is, any symbol in the first symbol set can be used to receive PDSCH, receive PDCCH, or not receive the channel.

[0100] The N symbols of the guard interval determined in the embodiment of the present application are continuous symbols, and the symbols on both sides of the guard interval belong to different time units. Figure 3 The position of the guard interval and the first time unit and the second time unit in the time domain is shown as follows: Figure 3 It can be seen that the guard interval is located at the boundary between the first time unit and the second time unit, the symbol on the left side of the guard interval belongs to the symbol of the first time unit, and the symbol on the right side of the guard interval belongs to the symbol of the second time unit.

[0101] According to the channel reception conditions of the symbols in the first symbol set, N symbols in the first symbol set are determined as the protection interval. The protection interval of N symbols includes the following situations: (1) the last N symbols at the end of the first time unit; (2) the first N symbols at the beginning of the second time unit; (3) N consecutive symbols selected from the last N-1 symbols at the end of the first time unit and the first N-1 symbols at the beginning of the second time unit.

[0102] As an example, when N is 1, the guard interval may be the last symbol at the end of the first time unit, or the first symbol at the beginning of the second time unit. As an example, when N is 2, the guard interval may be the last two symbols at the end of the first time unit, or the first two symbols at the beginning of the second time unit, or the last symbol at the end of the first time unit and the first symbol at the beginning of the second time unit. As an example, when N is 3, the guard interval may be the last three symbols at the end of the first time unit, or the first three symbols at the beginning of the second time unit, or three consecutive symbols selected from the last two symbols at the end of the first time unit and the first two symbols at the beginning of the second time unit.

[0103] The above examples show several possible situations of the protection interval corresponding to different N values. For the several possible situations of the protection interval corresponding to any one N value, it is necessary to conduct a comprehensive analysis based on the channel reception conditions of each symbol at the junction of the time units to determine the final protection interval. In the comprehensive analysis, the type of channel of the symbol at the junction, the type of information carried by the channel, the type of search space of the channel, etc. can be considered, so that the symbol finally selected as the protection interval has the least impact on the terminal channel reception performance. In the NR system, since the channel resource configuration of different time units is very flexible, there are many channel reception conditions for symbols at the junction of two consecutive time units, and the factors considered in the comprehensive analysis are not the same. For details, please refer to the following embodiments.

[0104] Step 102: Perform frequency sub-band retuning in the determined guard interval. The frequency sub-band retuning means that the UE adjusts the receiver bandwidth from the bandwidth of the first time unit to the bandwidth of the second time unit. During the frequency sub-band retuning, the UE does not receive or send channels.

[0105] The method for determining the guard interval provided in the embodiment of the present application determines N symbols as the guard interval by comprehensively analyzing the channel reception conditions of multiple symbols at the junction of two consecutive time units, where N is a positive integer. The N symbols of the determined guard interval are continuous symbols, and the symbols on both sides of the guard interval belong to symbols of different time units. The terminal performs frequency sub-band retuning in the determined guard interval. The guard interval determined by the above method has the least impact on the terminal channel reception performance, thereby ensuring the transmission performance of the communication system.

[0106] The above embodiment shows that the terminal needs to perform a comprehensive analysis based on the channel reception requests of multiple symbols at the junction of two consecutive time units to determine the protection interval. Figure 4 To Attachment Fig. 20 A method for determining a guard interval for various symbol distribution situations at the junction of two consecutive time units is described in detail. The symbol distribution at the junction of the time units is the symbol distribution in the first symbol set. Since each symbol in the first symbol set can be used to receive PDSCH, PDCCH, or not receive a channel, the first symbol set may include only one type of symbol or multiple types of symbols.

[0107] The following describes the situation where the first symbol set includes only one type of symbol. Figures 4 to 9 .

[0108] In the first case, multiple symbols at the junction of the first time unit and the second time unit are all used to receive PDSCH, that is, the symbols in the first symbol set are all used to receive PDSCH. The protection interval can be the last N symbols at the end of the first time unit, or the first N symbols at the end of the second time unit, or N consecutive symbols selected from the last N-1 symbols at the end of the first time unit and the first N-1 symbols at the beginning of the second time unit.

[0109] Figure 4 A schematic diagram of symbol distribution at the junction of time units provided in an embodiment of the present application. Figure 4 The number of guard interval symbols N is 1, the symbols in the first symbol set include the last symbol at the end of the first time unit and the first symbol at the beginning of the second time unit, and a symbol is selected from the first symbol set as the guard interval. In this example, the guard interval can be Figure 4 The guard interval shown in (a), i.e. the last symbol at the end of the first time unit, may also be Figure 4 The protection interval shown in (b) is the first symbol at the beginning of the second time unit.

[0110] Figure 5A schematic diagram of symbol distribution at the junction of time units provided in an embodiment of the present application. Figure 5 The number of guard interval symbols N is 2, the symbols in the first symbol set include the last two symbols at the end of the first time unit and the first two symbols at the beginning of the second time unit, and two consecutive symbols are selected from the first symbol set as the guard interval. In this example, the guard interval can be Figure 5 The guard interval shown in (a), that is, the last symbol at the end of the first time unit and the first symbol at the beginning of the second time unit, can also be Figure 5 The guard interval shown in (b), i.e., the last two symbols at the end of the first time unit, may also be Figure 5 The protection interval shown in (c) is the first two symbols at the beginning of the second time unit.

[0111] In the first case above, if the protection interval is the last N symbols at the end of the first time unit, or the first N symbols at the end of the second time unit. Whether to select the last N symbols at the end of the first time unit as the protection interval or the first N symbols at the beginning of the second time unit as the protection interval can be determined in the following manner: the protection interval is determined according to the type of information received by the last N symbols at the end of the first time unit and the first N symbols at the beginning of the second time unit. Among them, the type of information received by the symbol for PDSCH includes public information or user information. The type of information received by the symbol for PDSCH can be determined according to the search space of PDCCH. For example, if the search space of PDCCH is a public search space, the corresponding type of information received by the symbol for PDSCH is public information. For another example, if the search space of PDCCH is a user-specific search space, the corresponding type of information received by the symbol for PDSCH is user information.

[0112] In a possible implementation, N symbols for receiving public information are used as a guard interval. In this implementation, the priority of user information carried by PDSCH is higher than the public information carried by PDSCH, so N symbols of PDSCH carrying public information are used as a guard interval.

[0113] In another possible implementation, N symbols of user information are used as a guard interval. In this implementation, the priority of public information carried by PDSCH is higher than that of user information carried by PDSCH, so N symbols of PDSCH carrying user information are used as a guard interval.

[0114] Furthermore, if the type of information received by the last N symbols at the end of the first time unit and the first N symbols at the beginning of the second time unit is the same, the terminal can also determine the protection interval based on the type of public information received by the last N symbols at the end of the first time unit and the first N symbols at the beginning of the second time unit, or the type of user information.

[0115] In a possible implementation, if the last N symbols at the end of the first time unit and the first N symbols at the beginning of the second time unit are both used to receive public information, the terminal can also determine whether to select the last N symbols or the first N symbols based on the type of public information received by the last N symbols at the end of the first time unit and the first N symbols at the beginning of the second time unit. The types of public information include system messages (such as SIB1 to SIB9), random access response messages, paging messages, time slot format indication messages, etc. In this implementation, the types of public information received by the last N symbols at the end of the first time unit and the first N symbols at the beginning of the second time unit are different, and the types of public information received by the last N symbols at the end of the first time unit are the same, and the types of public information received by the first N symbols at the beginning of the second time unit are the same. The terminal can determine whether to select the last N symbols or the first N symbols based on the priority of the preset public information type.

[0116] In another possible implementation, if the last N symbols at the end of the first time unit and the first N symbols at the beginning of the second time unit are both used to receive user information, the terminal can also determine whether to select the last N symbols or the first N symbols according to the type of user information received by the last N symbols at the end of the first time unit and the first N symbols at the beginning of the second time unit. The type of user information may be the type of service, for example, the service type is service 1, service 2, service 3, etc. As an example, the PDSCH carries the channel resources determined by the semi-static configuration authorization method, and the user information carried by the PDSCH may be service data with low delay and high reliability requirements. As another example, the user information carried by the PDSCH scheduled by DCI may also be ordinary service data. In this implementation, the last N symbols at the end of the first time unit and the first N symbols at the beginning of the second time unit receive different types of user information, and the last N symbols at the end of the first time unit receive the same type of user information, and the first N symbols at the beginning of the second time unit receive the same type of user information. The terminal can determine whether to select the last N symbols or the first N symbols according to the priority of the preset user information type. The network side may indicate the priority information of the preset user information type through the PDCCH, for example, through the timing parameter K0 in the PDCCH.

[0117] In the first case above, the terminal receives the type of information of PDSCH through symbols in the first symbol set, selects N consecutive symbols from the last N symbols at the end of the first time unit and the first N symbols at the beginning of the second time unit as the protection interval, and the symbols on both sides of the protection interval belong to symbols of different time units. Among them, which information type symbol is selected depends on the priority of the preset information type. The information type can be divided into public information or user information, and the type of public information or user information can be further subdivided. The protection interval determined by the above method has the least impact on the transmission of PDSCH, ensuring the transmission performance of the communication system.

[0118] In the second case, multiple symbols at the junction of the first time unit and the second time unit are all used to receive the PDCCH, that is, the symbols in the first symbol set are all used to receive the PDCCH. The guard interval can be the last N symbols at the end of the first time unit, or the first N symbols at the end of the second time unit, or N consecutive symbols selected from the last N-1 symbols at the end of the first time unit and the first N-1 symbols at the beginning of the second time unit.

[0119] Figure 6 A schematic diagram of symbol distribution at the junction of time units provided in an embodiment of the present application. Figure 6 The number of guard interval symbols N is 1, the symbols in the first symbol set include the last symbol at the end of the first time unit and the first symbol at the beginning of the second time unit, and a symbol is selected from the first symbol set as the guard interval. In this example, the guard interval can be Figure 6 The guard interval shown in (a), i.e. the last symbol at the end of the first time unit, may also be Figure 6 The protection interval shown in (b) is the first symbol at the beginning of the second time unit.

[0120] Figure 7 A schematic diagram of symbol distribution at the junction of time units provided in an embodiment of the present application. Figure 7 The number of guard interval symbols N is 2, the symbols in the first symbol set include the last two symbols at the end of the first time unit and the first two symbols at the beginning of the second time unit, and two consecutive symbols are selected from the first symbol set as the guard interval. In this example, the guard interval can be Figure 7 The guard interval shown in (a), that is, the last symbol at the end of the first time unit and the first symbol at the beginning of the second time unit, can also be Figure 7 The guard interval shown in (b), i.e., the last two symbols at the end of the first time unit, may also be Figure 7 The protection interval shown in (c) is the first two symbols at the beginning of the second time unit.

[0121] In the second case above, if the guard interval is the last N symbols at the end of the first time unit, or the first N symbols at the end of the second time unit, the following method can be used to determine whether to select the last N symbols at the end of the first time unit as the guard interval or the first N symbols at the beginning of the second time unit as the guard interval:

[0122] The guard interval is determined according to the type of search space for receiving PDCCH from the last N symbols at the end of the first time unit and the first N symbols at the beginning of the second time unit, wherein the type of search space for receiving PDCCH includes a common search space or a user-specific search space.

[0123] In a possible implementation, N symbols of the common search space of the received PDCCH are used as a guard interval. In this implementation, the priority of the user-specific search space of the PDCCH is higher than the common search space of the PDCCH, so N symbols of the common search space of the received PDCCH are used as a guard interval.

[0124] In another possible implementation, N symbols of the user-specific search space of the received PDCCH are used as a guard interval. In this implementation, the priority of the common search space of the PDCCH is higher than the user-specific search space of the PDCCH, so the N symbols of the user-specific search space of the received PDCCH are used as a guard interval.

[0125] Furthermore, if the type of search space for receiving PDCCH for the last N symbols at the end of the first time unit and the first N symbols at the beginning of the second time unit is the same, the terminal can also determine the protection interval based on the type of common search space for receiving PDCCH for the last N symbols at the end of the first time unit and the first N symbols at the beginning of the second time unit, or the type of user-specific search space.

[0126] In a possible implementation, if the types of the search spaces for PDCCH received by the last N symbols at the end of the first time unit and the first N symbols at the beginning of the second time unit are both common search spaces, the terminal can also determine whether to select the last N symbols or the first N symbols based on the types of the common search spaces for PDCCH received by the last N symbols at the end of the first time unit and the first N symbols at the beginning of the second time unit. Among them, the types of the common search spaces for PDCCH include type0, type0A, type1, and type2 PDCCH search spaces. In this implementation, the types of the common search spaces for PDCCH received by the last N symbols at the end of the first time unit and the first N symbols at the beginning of the second time unit are different, and the types of the common search spaces for PDCCH received by the last N symbols at the end of the first time unit are the same, and the types of the common search spaces for PDCCH received by the first N symbols at the beginning of the second time unit are the same. The terminal can determine whether to select the last N symbols or the first N symbols based on the priority of the preset common search space type.

[0127] In another possible implementation, if the types of the search spaces for receiving the PDCCH for the last N symbols at the end of the first time unit and the first N symbols at the beginning of the second time unit are both user-specific search spaces, the terminal may also determine whether to select the last N symbols or the first N symbols according to the types of the user-specific search spaces for receiving the PDCCH for the last N symbols at the end of the first time unit and the first N symbols at the beginning of the second time unit. The type of the user-specific search space may be a service type for data transmission based on the DCI scheduling corresponding to the user-specific search space, such as a user-specific search space for service types 1, 2, and 3. The type of the user-specific search space may be obtained from the configuration information of the search space, that is, the configuration information of the search space includes indication information for distinguishing the type or priority of the user-specific search space. In this implementation, the types of the search spaces for receiving the PDCCH for the last N symbols at the end of the first time unit and the first N symbols at the beginning of the second time unit are different, and the types of the search spaces for receiving the PDCCH for the last N symbols at the end of the first time unit are the same, and the types of the search spaces for receiving the PDCCH for the first N symbols at the beginning of the second time unit are the same. The terminal can determine whether to select the last N symbols or the first N symbols according to the priority of the preset user-specific search space type. The network side can indicate the priority information of the preset user-specific search space type through PDCCH, for example, determining the priority information through the timing parameter K0 in PDCCH.

[0128] In the second case mentioned above, the terminal receives the type of search space of PDCCH through symbols in the first symbol set, selects N consecutive symbols from the last N symbols at the end of the first time unit and the first N symbols at the beginning of the second time unit as the protection interval, and the symbols on both sides of the protection interval belong to symbols of different time units. Among them, which search space symbol is selected depends on the priority of the preset search space type. The type of search space can be divided into a common search space or a user-specific search space, and the type of common search space or user-specific search space can be further subdivided. The protection interval determined by the above method has the least impact on the PDCCH reception performance, ensuring the transmission of high-priority PDCCH.

[0129] In the third case, multiple symbols at the junction of the first time unit and the second time unit do not receive the channel, that is, none of the symbols in the first symbol set receives the channel. The guard interval may be the last N symbols at the end of the first time unit, or the first N symbols at the end of the second time unit, or N consecutive symbols selected from the last N-1 symbols at the end of the first time unit and the first N-1 symbols at the beginning of the second time unit.

[0130] Figure 8 A schematic diagram of symbol distribution at the junction of time units provided in an embodiment of the present application. Figure 8 The number of guard interval symbols N is 1, the symbols in the first symbol set include the last symbol at the end of the first time unit and the first symbol at the beginning of the second time unit, and a symbol is selected from the first symbol set as the guard interval. In this example, the guard interval can be Figure 8 The guard interval shown in (a), i.e. the last symbol at the end of the first time unit, may also be Figure 8 The protection interval shown in (b) is the first symbol at the beginning of the second time unit.

[0131] Fig. 9 A schematic diagram of symbol distribution at the junction of time units provided in an embodiment of the present application. Fig. 9 The number of guard interval symbols N is 2, the symbols in the first symbol set include the last two symbols at the end of the first time unit and the first two symbols at the beginning of the second time unit, and two consecutive symbols are selected from the first symbol set as the guard interval. In this example, the guard interval can be Fig. 9 The guard interval shown in (a), that is, the last symbol at the end of the first time unit and the first symbol at the beginning of the second time unit, can also be Fig. 9 The guard interval shown in (b), i.e., the last two symbols at the end of the first time unit, may also be Fig. 9 The protection interval shown in (c) is the first two symbols at the beginning of the second time unit.

[0132] In the third case above, the last N symbols at the end of the first time unit and the first N symbols at the beginning of the second time unit do not receive the channel. The terminal can select the last N symbols at the end of the first time unit as the protection interval, or the first N symbols at the beginning of the second time unit as the protection interval, or can select consecutive N symbols from the last N-1 symbols at the end of the first time unit and the first N-1 symbols at the beginning of the second time unit as the protection interval. Any of the above three selection methods can be set according to predefined rules, and the embodiments of the present application do not impose any restrictions on this. The protection interval determined by the above method has the least impact on the terminal channel reception performance, ensuring the transmission performance of the communication system.

[0133] The following describes a case where the first symbol set includes at least two types of symbols.

[0134] If the symbols in the first symbol set are used to receive at least two of PDSCH, PDCCH, or non-receiving channels, the guard interval is to select N consecutive symbols from the last N symbols at the end of the first time unit and the first N symbols at the beginning of the second time unit, the symbols on both sides of the guard interval belong to symbols of different time units, the number of symbols of non-receiving channels in the consecutive N symbols is greater than or equal to the number of symbols of receiving PDSCH, and the number of symbols of receiving PDSCH is greater than or equal to the number of symbols of receiving PDCCH. In other words, the general principle of selecting N consecutive symbols is to include as many symbols of non-receiving channels as possible, that is, the first most symbols in the consecutive N symbols are symbols of non-receiving channels, the second most symbols are symbols of receiving PDSCH, and the last are symbols of receiving PDCCH.

[0135] In some embodiments, the number of symbols not receiving channels in the selected N consecutive symbols is greater than or equal to the number of symbols receiving PDCCH, and the number of symbols receiving PDCCH is greater than or equal to the number of symbols receiving PDSCH.

[0136] The following is combined with Figures 10 to 20 Different situations in which the symbols in the first symbol set are used to receive PDSCH, PDCCH, or at least two of the channels are not received are described in detail. It should be noted that since the symbols at the junction of the first time unit and the second time unit include at least two of the symbols for receiving PDSCH, receiving PDCCH, and not receiving the channel, the symbol distribution is relatively complex, and the following examples cannot exhaustively list all symbol distribution situations. For symbol distribution situations not shown, the terminal determines the protection interval based on the general principle of the above selection.

[0137] In some embodiments, the channel reception conditions of the symbols at the end of the first time unit and the symbols at the beginning of the second time unit in the first symbol set are different, and the protection interval can be the last N symbols at the end of the first time unit, or the first N symbols at the beginning of the second time unit. The terminal can determine the protection interval based on the type of the channel received by the last N symbols at the end of the first time unit and the first N symbols at the beginning of the second time unit. Specifically, N symbols of the first channel type are used as the protection interval, where the first channel type includes one of PDSCH, PDCCH, and non-receiving channel.

[0138] Fig.10 A schematic diagram of symbol distribution at the junction of time units provided in an embodiment of the present application. Fig.10 The number of guard interval symbols N is 1. The symbols in the first symbol set include the last symbol at the end of the first time unit and the first symbol at the beginning of the second time unit. A symbol is selected from the first symbol set as the guard interval. For example, if the last symbol at the end of the first time unit receives PDSCH and the first symbol at the beginning of the second time unit receives PDCCH, if the priority of PDCCH is higher than that of PDSCH, the guard interval is Fig.10 The guard interval shown in (a) is the last symbol at the end of the first time unit, which receives the PDSCH. This implementation method gives priority to the transmission of the PDCCH, and the selection of the guard interval has little effect on the transmission of the PDCCH. If the priority of the PDSCH is higher than that of the PDCCH, the guard interval is Fig.10 The guard interval shown in (b) is the first symbol at the beginning of the second time unit, and the symbol receives the PDCCH. This implementation method gives priority to the transmission of the PDSCH, and the selection of the guard interval has little effect on the transmission of the PDSCH.

[0139] For the last symbol at the end of the first time unit to receive PDCCH, and the first symbol at the beginning of the second time unit to receive PDSCH, the principle of determining the guard interval is the same as Fig.10 The examples shown are not repeated here.

[0140] Fig.11 A schematic diagram of symbol distribution at the junction of time units provided in an embodiment of the present application. Fig.11 The number of guard interval symbols N is 2. The symbols in the first symbol set include the last two symbols at the end of the first time unit and the first two symbols at the beginning of the second time unit. Two consecutive symbols are selected from the first symbol set as the guard interval. For example, if the last two symbols at the end of the first time unit receive PDSCH and the first two symbols at the beginning of the second time unit receive PDCCH, if the priority of PDCCH is higher than that of PDSCH, the guard interval is Fig.11The guard interval shown in (a) is the last two symbols at the end of the first time unit. The last two symbols are both PDSCH. This implementation method gives priority to the transmission of PDCCH, and the selection of the guard interval has little effect on the transmission of PDCCH. If the priority of PDSCH is higher than that of PDCCH, the guard interval is Fig.11 The protection interval shown in (b) is the first two symbols at the beginning of the second time unit, and the first two symbols are both used to receive PDCCH. This implementation method gives priority to the transmission of PDSCH, and the selection of the protection interval has little impact on the transmission of PDSCH. In one implementation, the priority order of PDSCH and PDCCH can be ignored, and the last symbol at the end of the first time unit for receiving PDSCH and the first symbol at the beginning of the second time unit for receiving PDCCH can be directly used as the protection interval, such as Fig.11 as shown in (c).

[0141] For the last two symbols at the end of the first time unit to receive PDCCH, and the first two symbols at the beginning of the second time unit to receive PDSCH, the principle of determining the guard interval is the same as Fig.11 The examples shown are not repeated here.

[0142] Fig.12 A schematic diagram of symbol distribution at the junction of time units provided in an embodiment of the present application. Fig.12 The number of guard interval symbols N is 1, and the symbols in the first symbol set include the last symbol at the end of the first time unit and the first symbol at the beginning of the second time unit. A symbol is selected from the first symbol set as the guard interval. For example, the last symbol at the end of the first time unit does not receive a channel, and the first symbol at the beginning of the second time unit receives PDCCH or PDSCH. Since the priority of not receiving a channel is lower than that of PDCCH and PDSCH, Fig.12 As shown, the last symbol at the end of the first time unit of the non-receiving channel is used as the guard interval. This implementation method gives priority to ensuring the transmission of PDCCH or PDSCH, and the selection of the guard interval has little impact on the transmission of PDCCH or PDSCH.

[0143] For the last symbol at the end of the first time unit, the PDCCH or PDSCH is received, and the first symbol at the beginning of the second time unit does not receive the channel. The principle of determining the protection interval is the same as Fig.12 The examples shown are not repeated here.

[0144] Fig.13 A schematic diagram of symbol distribution at the junction of time units provided in an embodiment of the present application. Fig.13The number of guard interval symbols N is 2, and the symbols in the first symbol set include the last two symbols at the end of the first time unit and the first two symbols at the beginning of the second time unit. Two consecutive symbols are selected from the first symbol set as the guard interval. For example, the last two symbols at the end of the first time unit do not receive the channel, and the first two symbols at the beginning of the second time unit receive PDCCH or PDSCH. Since the priority of not receiving the channel is lower than that of PDCCH and PDSCH, Fig.13 As shown, the last two symbols at the end of the first time unit of the non-receiving channel are used as the guard interval. This implementation method gives priority to ensuring the transmission of PDCCH or PDSCH, and the selection of the guard interval has little impact on the transmission of PDCCH or PDSCH.

[0145] For the last two symbols at the end of the first time unit, PDCCH or PDSCH is received, and the first two symbols at the beginning of the second time unit do not receive the channel, the principle of determining the protection interval is the same as Fig.13 The examples shown are not repeated here.

[0146] In some embodiments, the number N of guard interval symbols is 2. If there are three consecutive symbols between the last two symbols at the end of the first time unit and the first two symbols at the beginning of the second time unit, which are symbols in which the terminal does not receive the channel, the terminal selects two consecutive symbols from the three consecutive symbols as the guard interval, such as Fig.14 shown.

[0147] In some embodiments, the number N of guard interval symbols is 2. If two consecutive symbols of the last two symbols at the end of the first time unit and the first two symbols at the beginning of the second time unit are symbols of the terminal not receiving the channel, the terminal uses the two consecutive symbols of the channel not receiving as the guard interval, such as Fig.13 , Fig.15 shown.

[0148] In some embodiments, the number N of guard interval symbols is 2. If only one of the last two symbols at the end of the first time unit and the first two symbols at the beginning of the second time unit is a symbol of a non-receiving channel, the symbol of the non-receiving channel is used as a symbol of the guard interval, and the other symbol of the guard interval is determined from symbols adjacent to the symbol of the non-receiving channel. The guard interval can be the symbol of the non-receiving channel and a symbol on the left of the symbol, such as Fig.16 As shown in (a), it can also be a symbol of a non-receiving channel and a symbol on the right side of the symbol, such as Fig.16 as shown in (b).

[0149] Specifically, another symbol of the protection interval is determined according to the channel type of the symbols on the left and right sides of the symbol of the non-receiving channel, for example, a symbol of the channel type PDCCH is used as another symbol of the protection interval, or a symbol of the channel type PDSCH is used as another symbol of the protection interval.

[0150] Furthermore, if the channel types of the symbols on the left and right sides of the symbol of the unreceived channel are the same, the following two situations are included:

[0151] In the first case, the channel types of the symbols on the left and right sides of the symbol of the unreceived channel are both PDSCH, and the symbol carrying public information is used as another symbol of the protection interval, or the symbol carrying user information is used as another symbol of the protection interval. Further, if the information types carried by the symbols on the left and right sides of the symbol of the unreceived channel are the same, the terminal determines the other symbol of the protection interval according to the type of public information or the type of user information. The above implementation principle is the same as Figure 4 , Figure 5 For details of the embodiment shown, please refer to the above embodiment.

[0152] In the second case, if the channel types of the symbols on the left and right sides of the symbol of the channel that is not received are both PDCCH, the symbol of the common search space of PDCCH is used as another symbol of the protection interval, or the symbol of the user-specific search space of PDCCH is used as another symbol of the protection interval. Further, if the search space types of the PDCCH on the left and right sides of the symbol of the channel that is not received are the same, the terminal determines another symbol of the protection interval according to the type of the common search space or the type of the user-specific search space. The above implementation principle is the same as Figure 6 , Figure 7 For details of the embodiment shown, please refer to the above embodiment.

[0153] In some embodiments, the number of guard interval symbols N is 2, if the last two symbols at the end of the first time unit and the first two symbols at the beginning of the second time unit include symbols for receiving PDSCH and symbols for receiving PDCCH, and the priority of PDCCH is preset to be higher than that of PDSCH, then at least one symbol in the determined guard interval is a symbol for receiving PDSCH. Fig.17 As shown in (a), the symbol of the received PDSCH is used as one symbol of the guard interval, and the other symbol of the guard interval is determined from symbols adjacent to the symbol of the received PDSCH.

[0154] In some embodiments, the number N of guard interval symbols is 3. If there are three consecutive received PDSCH symbols among the last three symbols at the end of the first time unit and the first three symbols at the beginning of the second time unit, the terminal uses the three consecutive received PDSCH symbols as the guard interval, such as Fig.17 as shown in (b).

[0155] In some embodiments, the number of guard interval symbols N is 2. If the last two symbols at the end of the first time unit and the first two symbols at the beginning of the second time unit include symbols for receiving PDSCH or PDCCH and symbols for not receiving channels, and the priority of not receiving channels is lower than that of PDSCH and PDCCH, then at least one symbol in the determined guard interval is a symbol for not receiving channels. Fig.18 As shown in (a), two consecutive symbols of the channel that are not received are used as the protection interval. Fig.18 As shown in (b), the symbols of the two non-receiving channels are not continuous, and the protection interval can be the last two symbols at the end of the first time unit, or the first two symbols at the beginning of the second time unit. Specifically, the terminal can determine the protection interval according to the type of information carried by the last symbol at the end of the first time unit and the first symbol at the beginning of the second time unit, or the type of the PDCCH search space.

[0156] In some embodiments, the number of guard interval symbols N is 3. If the last three symbols at the end of the first time unit and the first three symbols at the beginning of the second time unit include symbols for receiving PDSCH or PDCCH, and symbols for not receiving channels, and the priority of not receiving channels is lower than that of PDSCH and PDCCH, then at least one symbol in the determined guard interval is a symbol for not receiving channels. Fig.19 As shown in (a), two consecutive symbols of the unreceived channel are used as two symbols of the protection interval, and the other symbol of the protection interval is the first symbol at the beginning of the second time unit. Fig.19 As shown in (b), if the symbols of the non-receiving channel are discontinuous (for example, appear at intervals), three consecutive symbols are selected from the last three symbols at the end of the first time unit and the first three symbols at the beginning of the second time unit, and two of the three consecutive symbols are symbols of the non-receiving channel that appear at intervals, for example Fig.19 The last three symbols at the end of the first time unit in (b), or the last symbol at the end of the first time unit and the first two symbols at the beginning of the second time unit. Specifically, the terminal may determine the protection interval according to the type of information carried by the second-to-last symbol at the end of the first time unit and the first symbol at the beginning of the second time unit, or the type of the PDCCH search space.

[0157] In some embodiments, the number of guard interval symbols N is 2, if the last two symbols at the end of the first time unit and the first two symbols at the beginning of the second time unit include symbols for receiving PDSCH, symbols for receiving PDCCH, and symbols for not receiving channels, and the priority of PDCCH is higher than that of PDSCH, and the priority of PDSCH is higher than that of not receiving channels, then at least one symbol for not receiving channels is determined in the guard interval. Fig. 20 As shown in (a), the last two symbols at the end of the first time unit are used as a protection interval, including a symbol for not receiving a channel and a symbol for receiving a PDSCH.

[0158] In some embodiments, the number of guard interval symbols N is 3, if the last three symbols at the end of the first time unit and the first three symbols at the beginning of the second time unit include symbols for receiving PDSCH, symbols for receiving PDCCH, and symbols for not receiving channels, and the priority of PDCCH is higher than that of PDSCH, and the priority of PDSCH is higher than that of not receiving channels, then at least one symbol for not receiving channels is included in the determined guard interval. Fig. 20 As shown in (b), the last three symbols at the end of the first time unit are used as a protection interval, including two consecutive symbols of no channel reception and one symbol of PDSCH reception.

[0159] By the above Figures 10 to 20 It can be seen from several embodiments that the guard interval of N symbols must meet the following conditions at the same time: the guard interval is N consecutive symbols, the symbols on both sides of the guard interval belong to different time units, the number of symbols of the non-receiving channel in the N symbols in the guard interval is greater than or equal to the number of symbols of the received PDSCH, and the number of symbols of the received PDSCH is greater than or equal to the number of symbols of the received PDCCH.

[0160] It should be noted that the above-mentioned embodiments are all based on the example of the priority of the non-receiving channel being less than the priority of PDSCH being less than the priority of PDCCH. In actual applications, the priority of the non-receiving channel can also be preset to be less than the priority of PDCCH being less than the priority of PDSCH. The embodiments of the present application do not impose any limitation on this.

[0161] In one embodiment, the guard interval of N symbols needs to meet the following conditions at the same time: the guard interval is N consecutive symbols, the symbols on both sides of the guard interval belong to different time units, the number of symbols of the non-receiving channel in the N symbols in the guard interval is greater than or equal to the number of symbols of the received PDCCH, and the number of symbols of the received PDCCH is greater than or equal to the number of symbols of the received PDSCH.

[0162] In general, the above embodiments all prioritize the channel types and preferentially select the symbols of the non-receiving channels at the junction of the time units as the protection interval, so as to ensure the minimum impact on the transmission of the PDCCH and PDSCH.

[0163] Fig.21 A flowchart of a method for determining a protection interval provided in an embodiment of the present application. Fig.21 As shown, the method provided in this embodiment can be applied to Figure 1 The base station shown in the figure comprises the following steps:

[0164] Step 201: Determine N symbols in a first symbol set as a guard interval according to channel transmission conditions of symbols in a first symbol set.

[0165] In the embodiment of the present application, the symbols in the first symbol set belong to the symbols at the end of the first time unit and the beginning of the second time unit, and the first time unit and the second time unit are two consecutive time units in the time domain, the first time unit is in the front, and the second time unit is in the back. Among them, the frequency domain subbands corresponding to the first time unit and the second time unit are different, and the number of symbols in the first symbol set is greater than N, and N is a positive integer.

[0166] The symbols in the first symbol set in the embodiment of the present application can be understood as the symbols at the junction of the first time unit and the second time unit. As an example, assuming that the number of symbols N in the protection interval is 1, the UE can select a symbol from the two symbols at the junction of the first time unit and the second time unit, where the two symbols at the junction can be the last symbol at the end of the first time unit and the first symbol at the beginning of the second time unit. As another example, assuming that the number of symbols in the protection interval is 2, the UE can select four symbols from the junction of the first time unit and the second time unit, where the four symbols at the junction can be the last two symbols at the end of the first time unit and the first two symbols at the beginning of the second time unit.

[0167] In the embodiment of the present application, the preset channel transmission conditions of the symbols in the first symbol set include: transmitting PDSCH, transmitting PDCCH, or not transmitting at least one of the channels. That is, any symbol in the first symbol set can be used to transmit PDSCH, transmit PDCCH, or not transmit the channel.

[0168] It should be noted that the preset channel sending status of the symbol can be understood as the planned channel sending status pre-configured by the network side for each symbol (such as sending PDCCH, sending PDCH, or not sending the channel). Specifically, the symbol corresponding to the search space of PDCCH can be semi-statically configured through high-level information, the symbol of PDSCH can be scheduled to be transmitted through the PDCCH sent in the current time slot or the previous time slot, and the symbol of PDSCH can be semi-statically configured through high-level signaling. Exemplarily, the preset channel sending status of symbol 1 is to send PDSCH. If symbol 1 is the last symbol at the end of the first time unit and is determined to be a protection interval, the base station can send or not send PDSCH on symbol 1 as a protection interval.

[0169] The N symbols of the guard interval determined in the embodiment of the present application are continuous symbols, and the symbols on both sides of the guard interval belong to different time units. Figure 3The position of the guard interval and the first time unit and the second time unit in the time domain is shown as follows: Figure 3 It can be seen that the guard interval is located at the boundary between the first time unit and the second time unit, the symbol on the left side of the guard interval belongs to the symbol of the first time unit, and the symbol on the right side of the guard interval belongs to the symbol of the second time unit.

[0170] According to the preset channel transmission conditions of the symbols in the first symbol set, N symbols in the first symbol set are determined as the protection interval. The protection interval of N symbols includes the following situations: (1) the last N symbols at the end of the first time unit; (2) the first N symbols at the beginning of the second time unit; (3) N consecutive symbols selected from the last N-1 symbols at the end of the first time unit and the first N-1 symbols at the beginning of the second time unit.

[0171] As an example, when the value of N is 1, the protection interval may be the last symbol at the end of the first time unit, or the first symbol at the beginning of the second time unit.

[0172] As an example, when N is 2, the protection interval can be the last two symbols at the end of the first time unit, or the first two symbols at the beginning of the second time unit, or the last symbol at the end of the first time unit and the first symbol at the beginning of the second time unit.

[0173] As an example, when N is 3, the protection interval can be the last three symbols at the end of the first time unit, or the first three symbols at the beginning of the second time unit, or 3 consecutive symbols selected from the last 2 symbols at the end of the first time unit and the first 2 symbols at the beginning of the second time unit.

[0174] The above examples show several possible situations of the protection interval corresponding to different N values. For the several possible situations of the protection interval corresponding to any one N value, it is necessary to conduct a comprehensive analysis based on the preset channel transmission conditions of each symbol at the junction of the time units to determine the final protection interval. In the comprehensive analysis, the type of channel of the symbol at the junction, the type of information carried by the channel, the type of search space of the channel, etc. can be considered, so that the symbol finally selected as the protection interval has the least impact on the terminal channel transmission performance. In the NR system, since the channel resource configuration of different time units is very flexible, there are many preset channel transmission conditions for the symbols at the junction of two consecutive time units, and the factors considered in the comprehensive analysis are not the same. For details, please refer to the following embodiments.

[0175] Step 202: Perform corresponding operations in the determined protection interval.

[0176] The operations performed by the base station in the determined protection interval include at least one of the following:

[0177] Not sending / sending a channel; performing frequency sub-band re-tuning; and performing rate matching on symbols belonging to the guard interval among symbols of the sending channel.

[0178] The frequency sub-band re-tuning in the embodiment of the present application refers to the base station adjusting the receiver bandwidth from the bandwidth of the first time unit to the bandwidth of the second time unit. During the frequency sub-band re-tuning, the base station may not receive information or send channels. The base station may also continue to send channels on symbols serving as guard intervals according to the preset sending status of the symbols. The embodiment of the present application does not impose any restrictions on this.

[0179] The rate matching of the embodiment of the present application refers to that when the preset channel contains a symbol as a protection interval, the data carried by the channel is modulated and mapped, and is not mapped to the symbol as the protection interval. Exemplarily, assuming that the base station plans to send PDSCH on the last 10 symbols at the end of the first time unit, wherein the last symbol at the end of the first time unit is used as the protection interval, the base station can adjust the time domain resources of PDSCH, and send PDSCH on 9 symbols excluding the last symbol in the last 10 symbols at the end of the first time unit, to ensure the reliability of the base station channel transmission.

[0180] The method for determining the guard interval provided in the embodiment of the present application determines N symbols as the guard interval by comprehensively analyzing the preset channel transmission conditions of multiple symbols at the junction of two consecutive time units, where N is a positive integer. The N symbols of the determined guard interval are continuous symbols, and the symbols on both sides of the guard interval belong to symbols of different time units. The base station may not send the channel in the determined guard interval, or perform frequency sub-band retuning, or rate match the symbols of the transmitted channel that belong to the guard interval. The guard interval determined by the above method has the least impact on the channel transmission performance of the base station, thereby ensuring the transmission performance of the communication system.

[0181] In some embodiments, if the preset channel transmission status of the symbols in the first symbol set is to send PDSCH, the protection interval is the last N symbols at the end of the first time unit or the first N symbols at the beginning of the second time unit; according to the preset channel transmission status of the symbols in the first symbol set, the N symbols in the first symbol set are determined to be the protection interval, including: determining the protection interval according to the type of preset transmission information of the last N symbols at the end of the first time unit and the first N symbols at the beginning of the second time unit.

[0182] In some embodiments, the protection interval is determined based on the type of information preset to be sent between the last N symbols at the end of the first time unit and the first N symbols at the beginning of the second time unit, including: using the N symbols preset to send public information as the protection interval; or using the N symbols preset to send user information as the protection interval.

[0183] In some embodiments, if the type of information sent by the last N symbols at the end of the first time unit and the first N symbols at the beginning of the second time unit is the same; the protection interval is determined based on the preset type of information sent by the last N symbols at the end of the first time unit and the first N symbols at the beginning of the second time unit, including: determining the protection interval based on the preset type of public information sent by the last N symbols at the end of the first time unit and the first N symbols at the beginning of the second time unit, or the type of user information.

[0184] In some embodiments, if the preset channel transmission status of the symbols in the first symbol set is to send PDCCH, the protection interval is the last N symbols at the end of the first time unit or the first N symbols at the beginning of the second time unit; according to the preset channel transmission status of the symbols in the first symbol set, the N symbols in the first symbol set are determined to be the protection interval, including: according to the type of search space for sending PDCCH preset according to the last N symbols at the end of the first time unit and the first N symbols at the beginning of the second time unit, the protection interval is determined.

[0185] In some embodiments, the protection interval is determined based on the type of search space preset for sending PDCCH based on the last N symbols at the end of the first time unit and the first N symbols at the beginning of the second time unit, including: using N symbols of the common search space preset for sending PDCCH as the protection interval; or using N symbols of the user-specific search space preset for sending PDCCH as the protection interval.

[0186] In some embodiments, if the type of search space for sending PDCCH for the last N symbols at the end of the first time unit and the first N symbols at the beginning of the second time unit is the same; the protection interval is determined according to the type of search space for sending PDCCH preset according to the last N symbols at the end of the first time unit and the first N symbols at the beginning of the second time unit, including: determining the protection interval according to the type of common search space for sending PDCCH preset according to the last N symbols at the end of the first time unit and the first N symbols at the beginning of the second time unit, or the type of user-specific search space.

[0187] In some embodiments, if the preset channel transmission conditions of the symbols in the first symbol set are all non-transmission channels, the guard interval is to select N consecutive symbols from the last N symbols at the end of the first time unit and the first N symbols at the beginning of the second time unit.

[0188] The above embodiments show the case where the first symbol set includes only one type of symbol, and its implementation principle and technical effect are the same as those of the terminal side. Figures 4 to 9 For details, please refer to the above embodiments, which will not be described in detail here.

[0189] In some embodiments, if the preset channel transmission conditions of the symbols in the first symbol set include sending PDSCH, PDCCH, or not sending at least two of the channels; the protection interval is N consecutive symbols selected from the last N symbols at the end of the first time unit and the first N symbols at the beginning of the second time unit, and the number of symbols for not sending the channel in the consecutive N symbols is greater than or equal to the number of symbols for sending PDSCH, and the number of symbols for sending PDSCH is greater than or equal to the number of symbols for sending PDCCH.

[0190] In some embodiments, if the preset channel transmission conditions of the symbols at the end of the first time unit in the first symbol set are different from those of the symbols at the beginning of the second time unit, the protection interval is the last N symbols at the end of the first time unit or the first N symbols at the beginning of the second time unit; according to the preset channel transmission conditions of the symbols in the first symbol set, the N symbols in the first symbol set are determined to be the protection interval, including: determining the protection interval according to the type of preset transmission channel for the last N symbols at the end of the first time unit and the first N symbols at the beginning of the second time unit.

[0191] In some embodiments, the type of the transmission channel is preset based on the last N symbols at the end of the first time unit and the first N symbols at the beginning of the second time unit, and the protection interval is determined, including: using N symbols of the first channel type as the protection interval; the first channel type includes one of PDSCH, PDCCH, and non-transmitting channel.

[0192] The above embodiments show the case where the first symbol set includes at least two types of symbols, and the implementation principle and technical effect are the same as those of the terminal side. Figures 10 to 20 For details, please refer to the above embodiments, which will not be described in detail here.

[0193] The above describes in detail the method for determining the protection interval provided in the embodiment of the present application. The following will describe the terminal device and network device provided in the embodiment of the present application.

[0194] Fig. 22 A schematic diagram of the structure of a terminal device provided in an embodiment of the present application. Fig. 22 As shown, the terminal device 300 provided in the embodiment of the present application includes:

[0195] The processing module 301 is used to determine, according to the channel reception status of the symbols in the first symbol set, that N symbols in the first symbol set are the guard interval;

[0196] The symbols in the first symbol set belong to the end of the first time unit and the beginning of the second time unit, the first time unit and the second time unit are two consecutive time units in the time domain, the first time unit and the second time unit correspond to different frequency domain subbands, and the number of symbols in the first symbol set is greater than N, where N is a positive integer.

[0197] In one implementation, the N symbols serving as the guard interval are continuous symbols, and the symbols on both sides of the guard interval belong to different time units.

[0198] In one embodiment, the guard interval is the last N symbols at the end of the first time unit; or

[0199] The guard interval is the first N symbols at the beginning of the second time unit; or

[0200] The guard interval is N consecutive symbols selected from the last N-1 symbols at the end of the first time unit and the first N-1 symbols at the beginning of the second time unit.

[0201] In one implementation, the channel reception status of the symbols in the first symbol set includes at least one of receiving a PDSCH, receiving a PDCCH, or not receiving a channel.

[0202] In a possible implementation, if the symbols in the first symbol set are all used to receive the PDSCH, the guard interval is the last N symbols at the end of the first time unit or the first N symbols at the beginning of the second time unit;

[0203] The processing module 301 is specifically configured to determine the protection interval according to the type of information received from the last N symbols at the end of the first time unit and the first N symbols at the beginning of the second time unit.

[0204] In a possible implementation, the processing module 301 is specifically configured to:

[0205] Using the N symbols of received public information as the guard interval; or

[0206] The N symbols of received user information are used as the guard interval.

[0207] In a possible implementation, if the type of received information of the last N symbols at the end of the first time unit and the first N symbols at the beginning of the second time unit is the same;

[0208] The processing module 301 is specifically configured to determine the protection interval according to the type of the public information received from the last N symbols at the end of the first time unit and the first N symbols at the beginning of the second time unit, or the type of the user information.

[0209] In a possible implementation, if the symbols in the first symbol set are all used to receive the PDCCH, the guard interval is the last N symbols at the end of the first time unit or the first N symbols at the beginning of the second time unit;

[0210] The processing module 301 is specifically configured to determine a guard interval according to the type of the search space for receiving the PDCCH based on the last N symbols at the end of the first time unit and the first N symbols at the beginning of the second time unit.

[0211] In a possible implementation, the processing module 301 is specifically configured to:

[0212] Using the N symbols of the common search space for receiving the PDCCH as the guard interval; or,

[0213] The N symbols of the user-specific search space of the PDCCH are received as the guard interval.

[0214] In a possible implementation, if the type of the search space for receiving the PDCCH for the last N symbols at the end of the first time unit and the first N symbols at the beginning of the second time unit is the same;

[0215] The processing module 301 is specifically used to determine the protection interval according to the type of the common search space of the PDCCH received by the last N symbols at the end of the first time unit and the first N symbols at the beginning of the second time unit, or the type of the user-specific search space.

[0216] In a possible implementation, if no symbols in the first symbol set receive a channel, the protection interval is to select N consecutive symbols from the last N symbols at the end of the first time unit and the first N symbols at the beginning of the second time unit.

[0217] In a possible implementation, if the symbols in the first symbol set are used to receive at least two of a PDSCH, a PDCCH, or a non-receiving channel;

[0218] The protection interval is to select N consecutive symbols from the last N symbols at the end of the first time unit and the first N symbols at the beginning of the second time unit, wherein the number of symbols of the non-receiving channel in the N consecutive symbols is greater than or equal to the number of symbols of the receiving PDSCH, and the number of symbols of the receiving PDSCH is greater than or equal to the number of symbols of the receiving PDCCH.

[0219] In a possible implementation, if the channel reception conditions of the symbol at the end of the first time unit and the symbol at the beginning of the second time unit in the first symbol set are different, the guard interval is the last N symbols at the end of the first time unit or the first N symbols at the beginning of the second time unit;

[0220] The processing module 301 is specifically configured to determine a protection interval according to the type of a receiving channel of the last N symbols at the end of the first time unit and the first N symbols at the beginning of the second time unit.

[0221] In a possible implementation, the processing module 301 is specifically configured to:

[0222] Using the N symbols of the first channel type as the guard interval;

[0223] The first channel type includes one of PDSCH, PDCCH, and a non-receiving channel.

[0224] In one implementation, the terminal device 300 further includes: a transceiver module 302 .

[0225] The transceiver module 302 does not receive the channel during the determined guard interval.

[0226] The processing module 301 is further configured to perform frequency sub-band retuning in the determined guard interval.

[0227] The terminal device provided in the embodiment of the present application is used to execute the technical solution of the terminal device in the aforementioned method embodiment. Its implementation principle and technical effects are similar and will not be repeated here.

[0228] Fig.23 A schematic diagram of the structure of a network device provided in an embodiment of the present application. Fig.23 As shown, the network device 400 provided in the embodiment of the present application includes:

[0229] The processing module 401 is used to determine, according to a preset channel transmission condition of symbols in the first symbol set, that N symbols in the first symbol set are guard intervals;

[0230] The symbols in the first symbol set belong to the end of the first time unit and the beginning of the second time unit, the first time unit and the second time unit are two consecutive time units in the time domain, the first time unit and the second time unit correspond to different frequency domain subbands, and the number of symbols in the first symbol set is greater than N, where N is a positive integer.

[0231] In one implementation, the N symbols serving as the guard interval are continuous symbols, and the symbols on both sides of the guard interval belong to different time units.

[0232] In one embodiment, the guard interval is the last N symbols at the end of the first time unit; or

[0233] The guard interval is the first N symbols at the beginning of the second time unit; or

[0234] The guard interval is N consecutive symbols selected from the last N-1 symbols at the end of the first time unit and the first N-1 symbols at the beginning of the second time unit.

[0235] In one implementation, the preset channel transmission condition of the symbols in the first symbol set includes at least one of transmitting a PDSCH, transmitting a PDCCH, or not transmitting a channel.

[0236] In a possible implementation, if the preset channel transmission conditions of the symbols in the first symbol set are all PDSCH transmission, the guard interval is the last N symbols at the end of the first time unit or the first N symbols at the beginning of the second time unit;

[0237] The processing module 401 is specifically configured to determine the protection interval according to the type of information preset for transmission based on the last N symbols at the end of the first time unit and the first N symbols at the beginning of the second time unit.

[0238] In a possible implementation, the processing module 401 is specifically configured to:

[0239] Using the N symbols preset to send public information as the guard interval; or

[0240] The N symbols preset to send user information are used as the protection interval.

[0241] In a possible implementation, if the type of information sent by the last N symbols at the end of the first time unit and the first N symbols at the beginning of the second time unit is the same;

[0242] The processing module 401 is specifically used to determine the protection interval according to the type of the public information to be sent, or the type of the user information, preset according to the last N symbols at the end of the first time unit and the first N symbols at the beginning of the second time unit.

[0243] In a possible implementation manner, if the preset channel transmission conditions of the symbols in the first symbol set are all PDCCH transmission, the guard interval is the last N symbols at the end of the first time unit or the first N symbols at the beginning of the second time unit;

[0244] The processing module 401 is specifically configured to determine the guard interval according to the type of search space for sending the PDCCH preset according to the last N symbols at the end of the first time unit and the first N symbols at the beginning of the second time unit.

[0245] In a possible implementation, the processing module 401 is specifically configured to:

[0246] The N symbols of the common search space preset for sending the PDCCH are used as the guard interval; or, the N symbols of the user-specific search space preset for sending the PDCCH are used as the guard interval.

[0247] In a possible implementation, if the type of the search space for sending the PDCCH by the last N symbols at the end of the first time unit and the first N symbols at the beginning of the second time unit is the same;

[0248] The processing module 401 is specifically used to determine the protection interval according to the type of common search space for sending the PDCCH, or the type of user-specific search space, preset according to the last N symbols at the end of the first time unit and the first N symbols at the beginning of the second time unit.

[0249] In one possible implementation, if the preset channel transmission conditions of the symbols in the first symbol set are all non-transmitting channels, the protection interval is to select N consecutive symbols from the last N symbols at the end of the first time unit and the first N symbols at the beginning of the second time unit.

[0250] In a possible implementation manner, if the preset channel transmission conditions of the symbols in the first symbol set include at least two of transmitting a PDSCH, a PDCCH, or not transmitting a channel;

[0251] The protection interval is to select N consecutive symbols from the last N symbols at the end of the first time unit and the first N symbols at the beginning of the second time unit, and the number of symbols for not sending channels in the N consecutive symbols is greater than or equal to the number of symbols for sending PDSCH, and the number of symbols for sending PDSCH is greater than or equal to the number of symbols for sending PDCCH.

[0252] In a possible implementation, if the preset channel transmission conditions of the symbol at the end of the first time unit and the symbol at the beginning of the second time unit in the first symbol set are different, the guard interval is the last N symbols at the end of the first time unit or the first N symbols at the beginning of the second time unit;

[0253] The processing module 401 is specifically configured to preset the type of the transmission channel according to the last N symbols at the end of the first time unit and the first N symbols at the beginning of the second time unit, and determine the protection interval.

[0254] In a possible implementation, the processing module 401 is specifically configured to:

[0255] Using the N symbols of the first channel type as the guard interval;

[0256] The first channel type includes one of PDSCH, PDCCH, and a non-transmitting channel.

[0257] In one implementation, the network device 400 further includes: a transceiver module 402 .

[0258] The transceiver module 402 is used to send or not send a channel in a determined protection interval.

[0259] The processing module 401 is further configured to perform frequency sub-band retuning in the determined guard interval, or perform rate matching on symbols belonging to the guard interval among symbols of the transmission channel.

[0260] The network device provided in the embodiment of the present application is used to implement the technical solution of the network device of the aforementioned method embodiment. Its implementation principle and technical effects are similar and will not be repeated here.

[0261] It should be noted that it should be understood that the division of the various modules of the above terminal equipment or network equipment is only a division of logical functions. In actual implementation, they can be fully or partially integrated into one physical entity, or they can be physically separated. And these modules can all be implemented in the form of software called by processing elements; they can also be all implemented in the form of hardware; some modules can also be implemented in the form of software called by processing elements, and some modules can be implemented in the form of hardware. For example, the processing module can be a separately established processing element, or it can be integrated in a chip of the above-mentioned device. In addition, it can also be stored in the memory of the above-mentioned device in the form of program code, and called and executed by a processing element of the above-mentioned device. The function of the above-mentioned module is determined. The implementation of other modules is similar. In addition, all or part of these modules can be integrated together, or they can be implemented independently. The processing element described here can be an integrated circuit with signal processing capabilities. In the implementation process, each step of the above method or each module above can be completed by an integrated logic circuit of hardware in the processor element or instructions in the form of software.

[0262] For example, the above modules may be one or more integrated circuits configured to implement the above methods, such as one or more application specific integrated circuits (ASIC), or one or more microprocessors (digital signal processors, DSP), or one or more field programmable gate arrays (FPGA), etc. For another example, when a module above is implemented in the form of a processing element scheduling program code, the processing element may be a general-purpose processor, such as a central processing unit (CPU) or other processor that can call program code. For another example, these modules may be integrated together and implemented in the form of a system-on-a-chip (SOC).

[0263] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the process or function described in the embodiment of the present application is generated in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions may be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from a website site, computer, server or data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) mode to another website site, computer, server or data center. The computer-readable storage medium may be any available medium that a computer can access or a data storage device such as a server or data center that includes one or more available media integrated. The available medium may be a magnetic medium, (e.g., a floppy disk, a hard disk, a tape), an optical medium (e.g., a DVD), or a semiconductor medium (e.g., a solid state disk (SSD)), etc.

[0264] Fig.24 A schematic diagram of the hardware structure of a terminal device provided in an embodiment of the present application. Fig.24 As shown, the terminal device 500 may include: a transceiver 501, a processor 502, and a memory 503; the memory 503 stores computer execution instructions; the processor 502 executes the computer execution instructions stored in the memory 503, so that the processor 502 executes the technical solution of the method for determining the protection interval on the terminal device side as in any of the aforementioned method embodiments.

[0265] In one implementation, the processor 502 may be a chip.

[0266] Fig.25 A schematic diagram of the hardware structure of a network device provided in an embodiment of the present application. Fig.25 As shown, the terminal device 600 may include: a transceiver 601, a processor 602, and a memory 603; the memory 603 stores computer execution instructions; the processor 602 executes the computer execution instructions stored in the memory 603, so that the processor 602 executes the technical solution of the method for determining the protection interval on the network device side as in any of the aforementioned method embodiments.

[0267] In one implementation, the processor 602 may be a chip.

[0268] An embodiment of the present application also provides a computer-readable storage medium, in which computer-executable instructions are stored. When the computer-executable instructions are executed by a processor, they are used to implement the technical solution on the terminal device side in any of the aforementioned method embodiments.

[0269] An embodiment of the present application further provides a computer-readable storage medium, in which computer-executable instructions are stored. When the computer-executable instructions are executed by a processor, they are used to implement the technical solution on the network device side in any of the aforementioned method embodiments.

[0270] An embodiment of the present application also provides a program, which, when executed by a processor, is used to execute the technical solution on the terminal device side in any of the aforementioned method embodiments.

[0271] The embodiment of the present application also provides a program, which, when executed by a processor, is used to execute the technical solution on the network device side in any of the aforementioned method embodiments.

[0272] An embodiment of the present application also provides a computer program product, including program instructions, which are used to implement the technical solution on the terminal device side in any of the aforementioned method embodiments.

[0273] An embodiment of the present application also provides a computer program product, including program instructions, which are used to implement the technical solution on the network device side in any of the aforementioned method embodiments.

[0274] The embodiment of the present application also provides a chip, including: a processing module and a communication interface, wherein the processing module can execute the technical solution on the terminal device side in the aforementioned method embodiment.

[0275] Furthermore, the chip also includes a storage module (such as a memory), the storage module is used to store instructions, the processing module is used to execute the instructions stored in the storage module, and the execution of the instructions stored in the storage module enables the processing module to execute the technical solution on the terminal device side.

[0276] The embodiment of the present application also provides a chip, including: a processing module and a communication interface, and the processing module can execute the technical solution on the network device side in the aforementioned method embodiment.

[0277] Furthermore, the chip also includes a storage module (such as a memory), the storage module is used to store instructions, the processing module is used to execute the instructions stored in the storage module, and the execution of the instructions stored in the storage module enables the processing module to execute the technical solution on the network device side.

[0278] In the present application, "at least two" means two or more, and "plurality" means two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone, where A and B can be singular or plural. The character " / " generally indicates that the previous and next associated objects are in an "or" relationship; in the formula, the character " / " indicates that the previous and next associated objects are in a "division" relationship. "At least one of the following items" or similar expressions refers to any combination of these items, including any combination of single items or plural items. For example, at least one of a, b, or c can represent: a, b, c, ab, ac, bc, or abc, where a, b, c can be single or multiple.

[0279] It should be understood that the various numerical numbers involved in the embodiments of the present application are only used for the convenience of description and are not used to limit the scope of the embodiments of the present application.

[0280] It can be understood that in the embodiments of the present application, the size of the serial numbers of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

Claims

1. A method for determining a guard interval, characterized in that: include: Determining, according to channel reception conditions of symbols in the first symbol set, that N symbols in the first symbol set are guard intervals; The symbols in the first symbol set belong to the symbols at the end of a first time unit and the beginning of a second time unit, the first time unit and the second time unit are two consecutive time units in the time domain, the first time unit and the second time unit correspond to different frequency domain subbands, and the number of symbols in the first symbol set is greater than N, where N is a positive integer; The channel reception status of the symbols in the first symbol set includes at least one of receiving a physical downlink shared channel PDSCH, receiving a physical downlink control channel PDCCH, or not receiving a channel; If the channel reception conditions of the symbols in the first symbol set are all PDSCH reception: The guard interval is the last N symbols at the end of the first time unit or or the first N symbols at the beginning of the second time unit; The determining, according to the channel reception conditions of the symbols in the first symbol set, that the N symbols in the first symbol set are the guard intervals includes: According to the last N symbols at the end of the first time unit and the second time unit The type of the first N symbols received at the beginning of the interval unit is used to determine the guard interval; If the channel reception conditions of the symbols in the first symbol set are all PDCCH reception: The guard interval is the last N symbols at the end of the first time unit or or the first N symbols at the beginning of the second time unit; The determining, according to the channel reception conditions of the symbols in the first symbol set, that the N symbols in the first symbol set are the guard intervals includes: According to the last N symbols at the end of the first time unit and the second time unit The type of the search space for receiving the PDCCH at the first N symbols at the beginning of the time unit, Determine the guard interval; If the channel reception conditions of the symbols in the first symbol set are all non-receiving channels: The guard interval is the last N symbols from the end of the first time unit and select N consecutive symbols from the first N symbols at the beginning of the second time unit; if the channel reception status of the symbols in the first symbol set includes at least two of receiving PDSCH, PDCCH, or not receiving a channel: The protection interval is to select N consecutive symbols from the last N symbols at the end of the first time unit and the first N symbols at the beginning of the second time unit, wherein the number of symbols of the non-receiving channel in the N consecutive symbols is greater than or equal to the number of symbols of the receiving PDSCH, and the number of symbols of the receiving PDSCH is greater than or equal to the number of symbols of the receiving PDCCH.

2. The method according to claim 1, characterized in that The N symbols serving as the guard interval are continuous symbols, and the symbols on both sides of the guard interval belong to different time units.

3. The method according to claim 1 or 2, characterized in that: The guard interval is the last N symbols at the end of the first time unit; or The guard interval is the first N symbols at the beginning of the second time unit; or The guard interval is N consecutive symbols selected from the last N-1 symbols at the end of the first time unit and the first N-1 symbols at the beginning of the second time unit.

4. The method according to claim 1, characterized in that If the channel reception conditions of the symbols in the first symbol set are all PDSCH reception, determining the guard interval according to the type of information received from the last N symbols at the end of the first time unit and the first N symbols at the beginning of the second time unit includes: Using the N symbols of received public information as the guard interval; or The N symbols of received user information are used as the guard interval.

5. The method according to claim 1, characterized in that If the channel reception conditions of the symbols in the first symbol set are all PDSCH reception, if the type of reception information of the last N symbols at the end of the first time unit and the first N symbols at the beginning of the second time unit is the same; The determining the guard interval according to the type of information received from the last N symbols at the end of the first time unit and the first N symbols at the beginning of the second time unit includes: The protection interval is determined according to the type of public information received by the last N symbols at the end of the first time unit and the first N symbols at the beginning of the second time unit, or the type of user information.

6. The method according to claim 1, characterized in that If the channel reception conditions of the symbols in the first symbol set are all PDCCH reception, the determining the guard interval according to the type of the search space for receiving the PDCCH based on the last N symbols at the end of the first time unit and the first N symbols at the beginning of the second time unit includes: Using the N symbols of the common search space for receiving the PDCCH as the guard interval; or, The N symbols of the user-specific search space of the PDCCH are received as the guard interval.

7. The method according to claim 1, characterized in that If the channel reception conditions of the symbols in the first symbol set are all for receiving PDCCH, if the search space type for receiving the PDCCH for the last N symbols at the end of the first time unit and the first N symbols at the beginning of the second time unit is the same; The determining the guard interval according to the type of the search space for receiving the PDCCH according to the last N symbols at the end of the first time unit and the first N symbols at the beginning of the second time unit includes: The guard interval is determined according to the type of the common search space for receiving the PDCCH in the last N symbols at the end of the first time unit and the first N symbols at the beginning of the second time unit, or the type of the user-specific search space.

8. The method according to claim 1, characterized in that If the channel reception conditions of the symbols in the first symbol set include at least two of receiving PDSCH, PDCCH, or not receiving a channel, if the channel reception conditions of the symbols at the end of the first time unit and the symbols at the beginning of the second time unit in the first symbol set are different, the guard interval is the last N symbols at the end of the first time unit or the first N symbols at the beginning of the second time unit; The determining, according to the channel reception conditions of the symbols in the first symbol set, that the N symbols in the first symbol set are the guard intervals includes: A guard interval is determined according to the type of a receiving channel of the last N symbols at the end of the first time unit and the first N symbols at the beginning of the second time unit.

9. The method according to claim 8, characterized in that The determining of the guard interval according to the type of the receiving channel of the last N symbols at the end of the first time unit and the first N symbols at the beginning of the second time unit includes: Using the N symbols of the first channel type as the guard interval; The first channel type includes one of PDSCH, PDCCH, and a non-receiving channel.

10. A method for determining a guard interval, characterized in that: include: Determining, according to a preset channel transmission condition of symbols in the first symbol set, that N symbols in the first symbol set are guard intervals; The symbols in the first symbol set belong to the symbols at the end of a first time unit and the beginning of a second time unit, the first time unit and the second time unit are two consecutive time units in the time domain, the first time unit and the second time unit correspond to different frequency domain subbands, and the number of symbols in the first symbol set is greater than N, where N is a positive integer; The preset channel transmission status of the symbols in the first symbol set includes at least one of transmitting a physical downlink shared channel PDSCH, transmitting a physical downlink control channel PDCCH, or not transmitting a channel; If the preset channel transmission conditions of the symbols in the first symbol set are all PDSCH transmission: The guard interval is the last N symbols at the end of the first time unit or or the first N symbols at the beginning of the second time unit; The determining, according to a preset channel transmission condition of symbols in the first symbol set, that N symbols in the first symbol set are guard intervals includes: According to the last N symbols at the end of the first time unit and the second time unit The first N symbols at the beginning of the interval unit preset the type of information to be sent, and determine the guard interval; If the preset channel transmission conditions of the symbols in the first symbol set are all PDCCH transmission: The guard interval is the last N symbols at the end of the first time unit or or the first N symbols at the beginning of the second time unit; The determining, according to a preset channel transmission condition of symbols in the first symbol set, that N symbols in the first symbol set are guard intervals includes: According to the last N symbols at the end of the first time unit and the second time unit The first N symbols at the beginning of the time unit preset the type of the search space for sending the PDCCH and determine the guard interval; If the preset channel transmission conditions of the symbols in the first symbol set are all non-transmission channels: The guard interval is the last N symbols from the end of the first time unit and selecting N consecutive symbols from the first N symbols at the beginning of the second time unit; If the preset channel transmission conditions of the symbols in the first symbol set include at least two of transmitting PDSCH, PDCCH, or not transmitting a channel; The protection interval is to select N consecutive symbols from the last N symbols at the end of the first time unit and the first N symbols at the beginning of the second time unit, and the number of symbols for not sending channels in the N consecutive symbols is greater than or equal to the number of symbols for sending PDSCH, and the number of symbols for sending PDSCH is greater than or equal to the number of symbols for sending PDCCH.

11. The method according to claim 10, characterized in that The N symbols serving as the guard interval are continuous symbols, and the symbols on both sides of the guard interval belong to different time units.

12. The method according to claim 10 or 11, characterized in that: The guard interval is the last N symbols at the end of the first time unit; or The guard interval is the first N symbols at the beginning of the second time unit; or The guard interval is N consecutive symbols selected from the last N-1 symbols at the end of the first time unit and the first N-1 symbols at the beginning of the second time unit.

13. The method according to claim 10, characterized in that If the preset channel transmission conditions of the symbols in the first symbol set are all PDSCH transmission, the determining the guard interval according to the type of preset transmission information of the last N symbols at the end of the first time unit and the first N symbols at the beginning of the second time unit includes: Using the N symbols preset to send public information as the guard interval; or The N symbols preset to send user information are used as the protection interval.

14. The method according to claim 10, characterized in that If the preset channel transmission conditions of the symbols in the first symbol set are all to transmit PDSCH, if the type of information transmitted by the last N symbols at the end of the first time unit and the first N symbols at the beginning of the second time unit is the same; The determining the guard interval according to the type of information sent by the last N symbols at the end of the first time unit and the first N symbols at the beginning of the second time unit includes: The protection interval is determined according to the type of public information to be sent, or the type of user information, preset by the last N symbols at the end of the first time unit and the first N symbols at the beginning of the second time unit.

15. The method according to claim 10, characterized in that If the preset channel transmission conditions of the symbols in the first symbol set are all for sending PDCCH, the type of the search space for sending the PDCCH is preset according to the last N symbols at the end of the first time unit and the first N symbols at the beginning of the second time unit, and the guard interval is determined, including: The N symbols of the common search space preset for sending the PDCCH are used as the guard interval; or, The N symbols of the user-specific search space for sending the PDCCH are preset as the guard interval.

16. The method according to claim 10, characterized in that If the preset channel transmission conditions of the symbols in the first symbol set are all for transmitting PDCCH, if the search space type for transmitting the PDCCH for the last N symbols at the end of the first time unit and the first N symbols at the beginning of the second time unit is the same; The step of presetting the type of search space for sending the PDCCH according to the last N symbols at the end of the first time unit and the first N symbols at the beginning of the second time unit, and determining the guard interval includes: The protection interval is determined according to the type of the common search space for sending the PDCCH preset according to the last N symbols at the end of the first time unit and the first N symbols at the beginning of the second time unit, or the type of the user-specific search space.

17. The method according to claim 10, characterized in that If the preset channel transmission conditions of the symbols in the first symbol set include at least two of transmitting PDSCH, PDCCH, or not transmitting a channel, if the preset channel transmission conditions of the symbols at the end of the first time unit and the symbols at the beginning of the second time unit in the first symbol set are different, the guard interval is the last N symbols at the end of the first time unit or the first N symbols at the beginning of the second time unit; The determining, according to a preset channel transmission condition of symbols in the first symbol set, that N symbols in the first symbol set are guard intervals includes: The protection interval is determined according to the type of the preset transmission channel based on the last N symbols at the end of the first time unit and the first N symbols at the beginning of the second time unit.

18. The method according to claim 17, characterized in that The step of presetting the type of the transmission channel according to the last N symbols at the end of the first time unit and the first N symbols at the beginning of the second time unit to determine the guard interval includes: Using the N symbols of the first channel type as the guard interval; The first channel type includes one of PDSCH, PDCCH, and a non-transmitting channel.

19. A terminal device, characterized in that: include: A processing module, configured to determine, according to channel reception conditions of symbols in the first symbol set, that N symbols in the first symbol set are guard intervals; The symbols in the first symbol set belong to the symbols at the end of a first time unit and the beginning of a second time unit, the first time unit and the second time unit are two consecutive time units in the time domain, the first time unit and the second time unit correspond to different frequency domain subbands, and the number of symbols in the first symbol set is greater than N, where N is a positive integer; The channel reception status of the symbols in the first symbol set includes at least one of receiving a physical downlink shared channel PDSCH, receiving a physical downlink control channel PDCCH, or not receiving a channel; If the channel reception conditions of the symbols in the first symbol set are all PDSCH reception: The guard interval is the last N symbols at the end of the first time unit or or the first N symbols at the beginning of the second time unit; The processing module is specifically configured to receive the type of information according to the last N symbols at the end of the first time unit and the first N symbols at the beginning of the second time unit, determining the protection interval; If the channel reception conditions of the symbols in the first symbol set are all PDCCH reception: The guard interval is the last N symbols at the end of the first time unit or or the first N symbols at the beginning of the second time unit; The processing module is specifically configured to receive the last N symbols at the end of the first time unit and the first N symbols at the beginning of the second time unit. The type of PDCCH search space determines the guard interval; If none of the symbols in the first symbol set receives a channel: The guard interval is the last N symbols from the end of the first time unit and select N consecutive symbols from the first N symbols at the beginning of the second time unit; if the channel reception status of the symbols in the first symbol set includes at least two of receiving PDSCH, PDCCH, or not receiving a channel: The guard interval is a continuous N symbols selected from the last N symbols at the end of the first time unit and the first N symbols at the beginning of the second time unit, wherein the number of symbols of the non-receiving channel in the continuous N symbols is greater than or equal to the number of symbols of the receiving channel. The number of PDSCH symbols, the number of received PDSCH symbols is greater than or equal to the number of received PDCCH symbols.

20. The device according to claim 19, characterized in that The N symbols serving as the guard interval are continuous symbols, and the symbols on both sides of the guard interval belong to different time units.

21. The device according to claim 19 or 20, characterized in that The guard interval is the last N symbols at the end of the first time unit; or The guard interval is the first N symbols at the beginning of the second time unit; or The guard interval is N consecutive symbols selected from the last N-1 symbols at the end of the first time unit and the first N-1 symbols at the beginning of the second time unit.

22. The device according to claim 19, characterized in that If the channel reception conditions of the symbols in the first symbol set are all PDSCH reception, the processing module is specifically used to: Using the N symbols of received public information as the guard interval; or The N symbols of received user information are used as the guard interval.

23. The device according to claim 19, characterized in that If the channel reception conditions of the symbols in the first symbol set are all PDSCH reception, if the type of reception information of the last N symbols at the end of the first time unit and the first N symbols at the beginning of the second time unit is the same; The processing module is specifically used to determine the protection interval according to the type of public information received by the last N symbols at the end of the first time unit and the first N symbols at the beginning of the second time unit, or the type of user information.

24. The device according to claim 19, characterized in that If the channel reception conditions of the symbols in the first symbol set are all PDCCH reception, the processing module is specifically used to: Using the N symbols of the common search space for receiving the PDCCH as the guard interval; or, The N symbols of the user-specific search space of the PDCCH are received as the guard interval.

25. The device according to claim 19, characterized in that If the channel reception conditions of the symbols in the first symbol set are all for receiving PDCCH, if the search space type for receiving the PDCCH for the last N symbols at the end of the first time unit and the first N symbols at the beginning of the second time unit is the same; The processing module is specifically used to determine the protection interval according to the type of the common search space of the PDCCH received by the last N symbols at the end of the first time unit and the first N symbols at the beginning of the second time unit, or the type of the user-specific search space.

26. The device according to claim 19, characterized in that If the channel reception conditions of the symbols in the first symbol set include at least two of receiving PDSCH, PDCCH, or not receiving a channel, if the channel reception conditions of the symbols at the end of the first time unit and the symbols at the beginning of the second time unit in the first symbol set are different, the guard interval is the last N symbols at the end of the first time unit or the first N symbols at the beginning of the second time unit; The processing module is specifically configured to determine a protection interval according to a type of a receiving channel of the last N symbols at the end of the first time unit and the first N symbols at the beginning of the second time unit.

27. The device according to claim 26, characterized in that The processing module is specifically used for: Using the N symbols of the first channel type as the guard interval; The first channel type includes one of PDSCH, PDCCH, and a non-receiving channel.

28. A network device, characterized in that: include: A processing module, configured to determine, according to a preset channel transmission condition of symbols in the first symbol set, that N symbols in the first symbol set are guard intervals; The symbols in the first symbol set belong to the symbols at the end of a first time unit and the beginning of a second time unit, the first time unit and the second time unit are two consecutive time units in the time domain, the first time unit and the second time unit correspond to different frequency domain subbands, and the number of symbols in the first symbol set is greater than N, where N is a positive integer; The preset channel transmission status of the symbols in the first symbol set includes at least one of transmitting a physical downlink shared channel PDSCH, transmitting a physical downlink control channel PDCCH, or not transmitting a channel; If the preset channel transmission conditions of the symbols in the first symbol set are all PDSCH transmission: The guard interval is the last N symbols at the end of the first time unit or or the first N symbols at the beginning of the second time unit; The processing module is specifically used to determine the guard interval according to the type of information preset for transmission of the last N symbols at the end of the first time unit and the first N symbols at the beginning of the second time unit; If the preset channel transmission conditions of the symbols in the first symbol set are all PDCCH transmission: The guard interval is the last N symbols at the end of the first time unit or or the first N symbols at the beginning of the second time unit; The processing module is specifically configured to preset the sending of the first time unit according to the last N symbols at the end of the first time unit and the first N symbols at the beginning of the second time unit. The type of the search space of the PDCCH determines the guard interval; If the preset channel transmission conditions of the symbols in the first symbol set are all non-transmission channels: The guard interval is the last N symbols from the end of the first time unit and selecting N consecutive symbols from the first N symbols at the beginning of the second time unit; If the preset channel transmission conditions of the symbols in the first symbol set include at least two of transmitting PDSCH, PDCCH, or not transmitting a channel: The guard interval is the last N symbols from the end of the first time unit and selecting N consecutive symbols from the first N symbols at the beginning of the second time unit, The number of symbols of the channel not transmitted in the continuous N symbols is greater than or equal to the number of symbols of the channel transmitted. The number of PDSCH symbols, the number of PDSCH symbols sent is greater than or equal to the number of PDCCH symbols sent.

29. The device according to claim 28, characterized in that The N symbols serving as the guard interval are continuous symbols, and the symbols on both sides of the guard interval belong to different time units.

30. The device according to claim 28 or 29, characterized in that The guard interval is the last N symbols at the end of the first time unit; or The guard interval is the first N symbols at the beginning of the second time unit; or The guard interval is N consecutive symbols selected from the last N-1 symbols at the end of the first time unit and the first N-1 symbols at the beginning of the second time unit.

31. The device according to claim 28, characterized in that If the preset channel transmission conditions of the symbols in the first symbol set are all PDSCH transmission, the processing module is specifically used to: Using the N symbols preset to send public information as the guard interval; or The N symbols preset to send user information are used as the protection interval.

32. The apparatus according to claim 28, characterized in that If the preset channel transmission conditions of the symbols in the first symbol set are all to transmit PDSCH, if the type of information transmitted by the last N symbols at the end of the first time unit and the first N symbols at the beginning of the second time unit is the same; The processing module is specifically used to determine the protection interval according to the type of public information to be sent, or the type of user information, preset according to the last N symbols at the end of the first time unit and the first N symbols at the beginning of the second time unit.

33. The device according to claim 28, characterized in that If the preset channel transmission conditions of the symbols in the first symbol set are all PDCCH transmission, the processing module is specifically used to: The N symbols of the common search space preset for sending the PDCCH are used as the guard interval; or, the N symbols of the user-specific search space preset for sending the PDCCH are used as the guard interval.

34. The apparatus according to claim 28, characterized in that If the preset channel transmission conditions of the symbols in the first symbol set are all for transmitting PDCCH, if the search space type for transmitting the PDCCH for the last N symbols at the end of the first time unit and the first N symbols at the beginning of the second time unit is the same; The processing module is specifically used to determine the protection interval according to the type of common search space for sending the PDCCH, or the type of user-specific search space, preset according to the last N symbols at the end of the first time unit and the first N symbols at the beginning of the second time unit.

35. The apparatus according to claim 28, characterized in that If the preset channel transmission conditions of the symbols in the first symbol set include at least two of transmitting PDSCH, PDCCH, or not transmitting a channel, if the preset channel transmission conditions of the symbols at the end of the first time unit and the symbols at the beginning of the second time unit in the first symbol set are different, the guard interval is the last N symbols at the end of the first time unit or the first N symbols at the beginning of the second time unit; The processing module is specifically used to preset the type of the transmission channel according to the last N symbols at the end of the first time unit and the first N symbols at the beginning of the second time unit, and determine the protection interval.

36. The device according to claim 35, characterized in that The processing module is specifically used for: Using the N symbols of the first channel type as the guard interval; The first channel type includes one of PDSCH, PDCCH, and a non-transmitting channel.

37. A terminal device, characterized in that: include: Transceivers, processors, memory; The memory stores computer-executable instructions; The processor executes the computer-executable instructions stored in the memory, so that the processor performs the method according to any one of claims 1 to 9.

38. A network device, characterized in that: include: Transceivers, processors, memory; The memory stores computer-executable instructions; The processor executes the computer-executable instructions stored in the memory, so that the processor performs the method according to any one of claims 10 to 18.

39. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer-executable instructions, which are used to implement the method according to any one of claims 1 to 9 when the computer-executable instructions are executed by a processor.

40. A computer-readable storage medium, characterized in that The computer-readable storage medium stores computer-executable instructions, which are used to implement the method of any one of claims 10-18 when executed by a processor.

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