A CP determination method, terminal device, and network device

Abstract

The present application discloses a CP determination method, a terminal device, and a network device. The method includes: the terminal device receives high-level signaling and / or downlink control information DCI, and the high-level signaling and / or DCI are used to indicate the CP of at least one symbol; the terminal device determines the CP of at least one symbol based on the high-level signaling and / or DCI.

Description

Technical Field

[0001] The present application relates to the field of wireless communication technology, and in particular to a cyclic prefix (CP) determination method, terminal equipment, and network equipment. Background Art

[0002] Due to the different service characteristics of the public network and the industry-specific network, they use different time division duplex (TDD) frame structure configurations. Therefore, when the two are networked at the same frequency, there will be serious cross-link interference problems.

[0003] From the perspective of the interfered base station, in order to enable interference cancellation processing, the timing deviation between the symbol boundary of the downlink signal sent by the interfering base station arriving at the cell and the symbol boundary of the uplink signal received by the cell must be less than or equal to the length of the CP.

[0004] However, in the prior art, the timing deviation between the symbol boundary of the downlink signal sent by the interfering base station arriving at the cell and the symbol boundary of the uplink signal received by the cell is much greater than the length of the CP, resulting in a high implementation complexity of the interference cancellation algorithm, which will exceed the actual processing capability of the existing hardware. Summary of the invention

[0005] To solve the above technical problems, embodiments of the present invention provide a CP determination method, a terminal device, a network device, a chip, and a computer-readable storage medium.

[0006] The CP determination method provided in the embodiment of the present application includes:

[0007] The terminal device receives high-level signaling and / or downlink control information (Down Control Information, DCI), where the high-level signaling and / or DCI are used to indicate a CP of at least one symbol;

[0008] The terminal device determines the CP of at least one symbol based on the high-layer signaling and / or DCI.

[0009] The CP determination method provided in the embodiment of the present application includes:

[0010] The network device sends high-layer signaling and / or DCI to the terminal device, where the high-layer signaling and / or DCI is used to indicate the CP of at least one symbol.

[0011] The CP determination device provided in the embodiment of the present application is applied to a terminal device, and the device includes:

[0012] A receiving unit, configured to receive high-level signaling and / or DCI, wherein the high-level signaling and / or DCI is used to indicate a CP of at least one symbol;

[0013] The determining unit is used to determine the CP of at least one symbol according to the high-layer signaling and / or DCI.

[0014] The CP determination device provided in the embodiment of the present application is applied to a terminal device, and the device includes:

[0015] A receiving unit, configured to receive high-level signaling and / or DCI, wherein the high-level signaling and / or DCI is used to indicate a CP of at least one symbol;

[0016] The determining unit is used to determine the CP of at least one symbol according to the high-layer signaling and / or DCI.

[0017] The terminal device provided in an embodiment of the present application includes: a processor and a memory, the memory is used to store a computer program, and the processor is used to call and run the computer program stored in the memory to execute any one of the above-mentioned CP determination methods.

[0018] The network device provided in the embodiment of the present application includes: a processor and a memory, the memory is used to store a computer program, and the processor is used to call and run the computer program stored in the memory to execute any one of the above-mentioned CP determination methods.

[0019] The chip provided in the embodiment of the present application includes: a processor, which is used to call and run a computer program from a memory, so that a device equipped with the chip executes any one of the above methods.

[0020] The core computer-readable storage medium provided in the embodiment of the present application is used to store a computer program, and the computer program enables a computer to execute any one of the above methods.

[0021] In the technical solution of the embodiment of the present application, the CP of at least one symbol is indicated by enhanced high-level signaling and / or DCI, thereby achieving flexible configuration of the CP, and thus the requirements of suppressing cross-link interference and improving spectrum efficiency can be met through the configured CP. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of an application scenario of an embodiment of the present application;

[0023] Figure 2 It is a schematic diagram of cross-link interference between a public network and an industry-specific network provided in an embodiment of the present application;

[0024] Figure 3 N is provided in the embodiment of the present application TA，offset Schematic diagram of the impact;

[0025] Figure 4 is a schematic diagram of the influence of propagation delay provided in an embodiment of the present application;

[0026] Figure 5 is a schematic diagram of the comprehensive timing deviation provided in an embodiment of the present application;

[0027] Figure 6 This is a schematic diagram of cell interference provided by an embodiment of the present application;

[0028] Figure 7 It is a schematic diagram of the lengths of a common CP and an extended CP provided in an embodiment of the present application;

[0029] Figure 8 is a schematic diagram of a hybrid time slot configuration provided in an embodiment of the present application;

[0030] Fig. 9 is a flow chart of a CP determination method provided in an embodiment of the present application;

[0031] Figure 10-1 It is a schematic diagram of DCI scheduling PDSCH provided in an embodiment of the present application;

[0032] Figure 10-2 It is a schematic diagram of DCI scheduling PUSCH provided in an embodiment of the present application;

[0033] Fig.11 It is a schematic diagram of each time slot using the same CP configuration provided by an embodiment of the present application;

[0034] Fig.12 is a schematic diagram of a reference subcarrier spacing provided in an embodiment of the present application;

[0035] Fig.13 It is a schematic diagram of different CP configurations for different symbols in a time slot provided by an embodiment of the present application;

[0036] Fig.14 The structure of the CP determination device provided in the embodiment of the present application is shown in FIG. Figure 1 ;

[0037] Fig.15 The structure of the CP determination device provided in the embodiment of the present application is shown in FIG. Figure 2 ;

[0038] Fig.16 is a schematic structural diagram of a communication device provided in an embodiment of the present application;

[0039] Fig.17 It is a schematic structural diagram of the chip of an embodiment of the present application. DETAILED DESCRIPTION

[0040] The following will describe the technical solutions in the embodiments of the present application 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.

[0041] Figure 1 It is a schematic diagram of an application scenario of an embodiment of the present application.

[0042] like Figure 1 As shown, the communication system 100 may include a terminal device 110 and a network device 120. The network device 120 may communicate with the terminal device 110 via an air interface. The terminal device 110 and the network device 120 support multi-service transmission.

[0043] It should be understood that the embodiments of the present application are only exemplified by the communication system 100, but the embodiments of the present application are not limited thereto. That is to say, the technical solutions of the embodiments of the present application can be applied to various communication systems, such as: Long Term Evolution (LTE) system, LTE Time Division Duplex (TDD), Universal Mobile Telecommunication System (UMTS), Internet of Things (IoT) system, Narrow Band Internet of Things (NB-IoT) system, enhanced Machine Type Communications (eMTC) system, 5G communication system (also called New Radio (NR) communication system), or future communication systems, etc.

[0044] exist Figure 1 In the communication system 100 shown, the network device 120 may be an access network device that communicates with the terminal device 110. The access network device may provide communication coverage for a specific geographical area, and may communicate with the terminal device 110 (eg, UE) located in the coverage area.

[0045] The network device 120 may be an evolved Node B (eNB or eNodeB) in a Long Term Evolution (LTE) system, or a Next Generation Radio Access Network (NG RAN) device, or a base station (gNB) in an NR system, or a wireless controller in a Cloud Radio Access Network (CRAN), or the network device 120 may be a relay station, an access point, a vehicle-mounted device, a wearable device, a hub, a switch, a bridge, a router, or a network device in a future evolved Public Land Mobile Network (PLMN), etc.

[0046] The terminal device 110 may be any terminal device, including but not limited to a terminal device connected to the network device 120 or other terminal devices by wire or wireless connection.

[0047] For example, the terminal device 110 may refer to an access terminal, a user equipment (UE), a user unit, a user station, a mobile station, a mobile station, a remote station, a remote terminal, a mobile device, a user terminal, a terminal, a wireless communication device, a user agent, or a user device. The access terminal may be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, an IoT device, a satellite handheld terminal, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device with wireless communication function, a computing device or other processing device connected to a wireless modem, a vehicle-mounted device, a wearable device, a terminal device in a 5G network, or a terminal device in a future evolution network, etc.

[0048] The terminal device 110 may be used for device-to-device (D2D) communication.

[0049] The wireless communication system 100 may also include a core network device 130 for communicating with the base station, and the core network device 130 may be a 5G core network (5G Core, 5GC) device, for example, an access and mobility management function (Access and Mobility Management Function, AMF), and for example, an authentication server function (Authentication Server Function, AUSF), and for example, a user plane function (User Plane Function, UPF), and for example, a session management function (Session Management Function, SMF). Optionally, the core network device 130 may also be an evolved packet core (Evolved Packet Core, EPC) device of the LTE network, for example, a session management function + a data gateway (Session Management Function + Core Packet Gateway, SMF + PGW-C) device of the core network. It should be understood that SMF + PGW-C can simultaneously implement the functions that SMF and PGW-C can implement. In the process of network evolution, the above-mentioned core network device may also be called other names, or a new network entity may be formed by dividing the functions of the core network, which is not limited to the embodiments of the present application.

[0050] The functional units in the communication system 100 may also establish connections through next generation (NG) network interfaces to achieve communication.

[0051] For example, the terminal device establishes an air interface connection with the access network device through the NR interface for transmitting user plane data and control plane signaling; the terminal device can establish a control plane signaling connection with the AMF through the NG interface 1 (N1 for short); the access network device, such as the next generation wireless access base station (gNB), can establish a user plane data connection with the UPF through the NG interface 3 (N3 for short); the access network device can establish a control plane signaling connection with the AMF through the NG interface 2 (N2 for short); the UPF can establish a control plane signaling connection with the SMF through the NG interface 4 (N4 for short); the UPF can exchange user plane data with the data network through the NG interface 6 (N6 for short); the AMF can establish a control plane signaling connection with the SMF through the NG interface 11 (N11 for short); the SMF can establish a control plane signaling connection with the PCF through the NG interface 7 (N7 for short).

[0052] Figure 1A base station, a core network device and two terminal devices are shown exemplarily. Optionally, the wireless communication system 100 may include multiple base station devices and each base station may include another number of terminal devices within its coverage area, which is not limited in the embodiments of the present application.

[0053] It should be noted that Figure 1 It is only to illustrate the system to which the present application is applicable in the form of an example. Of course, the method shown in the embodiment of the present application can also be applied to other systems. In addition, the terms "system" and "network" are often used interchangeably in this article. The term "and / or" in this article is only a description of the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship. It should also be understood that the "indication" mentioned in the embodiment of the present application can be a direct indication, an indirect indication, or an indication of an association relationship. For example, A indicates B, which can mean that A directly indicates B, for example, B can be obtained through A; it can also mean that A indirectly indicates B, for example, A indicates C, B can be obtained through C; it can also mean that there is an association relationship between A and B. It should also be understood that the "correspondence" mentioned in the embodiment of the present application can mean that there is a direct or indirect correspondence relationship between the two, or it can mean that there is an association relationship between the two, or it can mean that there is an indication and being indicated, configuration and being configured, etc. It should also be understood that the "predefined" or "predefined rules" mentioned in the embodiments of the present application can be implemented by pre-saving corresponding codes, tables or other methods that can be used to indicate relevant information in devices (for example, including terminal devices and network devices), and the present application does not limit its specific implementation method. For example, predefined can refer to the definition in the protocol. It should also be understood that in the embodiments of the present application, the "protocol" may refer to a standard protocol in the field of communications, such as LTE protocols, NR protocols, and related protocols used in future communication systems, and the present application does not limit this.

[0054] To facilitate understanding of the technical solutions of the embodiments of the present application, the relevant technologies of the embodiments of the present application are described below. The following related technologies can be arbitrarily combined with the technical solutions of the embodiments of the present application as optional solutions, and they all belong to the protection scope of the embodiments of the present application.

[0055] Cross-link interference

[0056] The public network is mainly used for downlink services, with more downlink time slots; the industry-specific network is mainly used for uplink services, with more uplink time slots. When the public network and the industry-specific network are networked in the same frequency TDD, there will be cross-link interference problems in some time slots.

[0057] like Figure 2As shown, the public network is implemented through the coverage of macro cells, and the base station corresponding to the public network is referred to as the public network base station. The industry-specific network is implemented through the coverage of cellular cells, and the base station corresponding to the industry-specific network is referred to as the industry-specific network base station. As an example, for the public network, the DDDSUDDSUU frame structure is used; for the industry-specific network, the DSUUU frame structure is used. On some time slots ( Figure 2 The public network base station is for downlink transmission, while the industry-specific network base station is for uplink reception. For the industry-specific network, since the power of the downlink signal (i.e., interference signal) sent by the public network base station in the neighboring area is much stronger than the power of the uplink signal (i.e., useful signal) sent by the terminal equipment corresponding to the industry-specific network, there is a more serious cross-link interference problem. Figure 2 In the cross-link interference shown, the public network base station can be understood as the interfering base station, and the industry-specific network base station can be understood as the interfered base station.

[0058] In order to suppress the above-mentioned cross-link interference problem, 3GPP has studied Duplexing flexibility and cross-link interference mitigation technology, and established the Cross-Link Interference (CLI) project.

[0059] In the process of standard research, the interference problem of downlink transmission of base station A (interfering base station) on uplink reception of base station B (interfered base station) can be solved based on the base station implementation method (referred to as cross-link interference between base stations). For example, when base stations A and B belong to the same manufacturer, base station A can inform base station B of the original downlink data it sends through a wired link; after base station B receives the original downlink data sent by base station A, it can easily "delete" the interference effect of base station B in the uplink reception signal to ensure its uplink network performance.

[0060] Based on the above considerations, the CLI standardization work did not enhance the standardized solution for the cross-link interference problem between base stations, but completely relied on manufacturers to implement it.

[0061] During the implementation in the existing network, it was found that from the perspective of the interfered base station, there may be a certain timing deviation between the symbol boundary of the downlink signal sent by the interfering base station in the neighboring cell arriving at the current cell and the symbol boundary of the uplink signal received by the current cell, and the timing deviation is greater than the length of the CP, resulting in the high complexity of the implementation of the interference cancellation algorithm, which will exceed the actual processing capabilities of the existing hardware.

[0062] Among them, timing deviation is mainly caused by the following two reasons:

[0063] 1) The preset timing advance (TA) offset in the TDD system, that is, N TA，offset ;

[0064] 2) Spatial propagation delay between base stations.

[0065] These two reasons are explained below.

[0066] The preset TA offset (N TA，offset )

[0067] The terminal device will receive the first path of the downlink frame of the reference cell before (N TA +N TA，offset )×T c Transmit uplink frames.

[0068] Among them, N TA，offset The method for determining N is as follows: TA，offset The value of can be configured by higher-level signaling (n-TimingAdvanceOffset). If N is not configured in higher-level signaling TA，offset The terminal device determines N according to the preset rules. TA，offset The default value of .

[0069] n-TimingAdvanceOffset is configured in a system message or a Radio Resource Control (RRC) signaling. As an example, the value range is shown in Table 1 below:

[0070]

[0071] Table 1

[0072] N TA，offset The default values ​​are shown in Table 2 below:

[0073]

[0074] Table 2

[0075] As can be seen from Table 2, for a typical TDD system (low frequency band FR1, and non-E-URA-NR and / or NB-IoT-NR coexistence), N TA，offset =25600. It should be noted that N TA，offset The unit is T c , where T c =1 / (Δf max ·N f )=1 / (480×10 3 ·4096)=0.5086×10 -9 s.

[0076] Note that for a typical NR system, the subcarrier spacing (SCS) is 30kHz (i.e., subcarrier configuration μ=1).

[0077] The duration of each symbol is in, Note that κ = T s / T c =64, therefore,

[0078] The NR system supports two types of CP formats, normal CP and extended CP. Table 3 below shows the transmission numerologies supported in the NR system, where μ is the subcarrier configuration and Δf is the subcarrier spacing.

[0079] μ <![CDATA[Δf=2 μ ·15[kHz]]]> CP 0 15 Ordinary CP 1 30 Ordinary CP 2 60 Normal CP, Extended CP 3 120 Ordinary CP 4 240 Ordinary CP

[0080] Table 3

[0081] As shown in Table 3 above, only when μ=2, normal CP and extended CP are supported. For other μ values, only normal CP is supported. Specifically, the CP length is in,

[0082]

[0083] Here, l is the symbol number.

[0084] As an example, when the subcarrier spacing is 30kHz (ie, subcarrier configuration μ=1), only normal CP is supported.

[0085]

[0086] In summary, for a 30kHz subcarrier spacing, N TA，offset =25600, therefore, That is N TA，offset ·T c It takes up about 0.39 symbol length and is much larger than the CP length.

[0087] In one example, if Figure 3 As shown in Figure 1, it is assumed that the frame timing boundaries of TDD base stations deployed on the same frequency in the 5G network are aligned. This functional requirement can be achieved by configuring a Global Navigation Satellite System (GNSS) timing receiver on each TDD base station.

[0088] Ignoring the propagation delay between the interfering base station and the interfered base station (assuming that the two are close to each other), the uplink symbol boundary of the interfered base station will be N ahead of its downlink symbol boundary. TA，offset ·T c Since the spatial propagation delay of the adjacent base stations is ignored, the uplink symbol reception boundary of the uplink signal of the interfered base station will also be N ahead of the symbol arrival boundary of the downlink interference signal of the neighboring cell. TA，offset ·T c When N TA，offset ·T c When >CP, the implementation complexity of the interference removal algorithm is too high and will exceed the actual processing capability of the existing hardware.

[0089] Spatial propagation delay between base stations

[0090] like Figure 4 As shown in FIG. 1 , when the influence of the neighboring station propagation delay is considered, when the downlink interference signal sent by the interfering base station reaches the interfered base station, its symbol boundary will be delayed by τs relative to the downlink symbol boundary of the interfered base station (τ represents the spatial propagation delay).

[0091] On the other hand, as mentioned above, due to the N TA，offset Configuration, the uplink symbol receiving boundary of the interfered base station will be N ahead of the downlink symbol boundary of the interfered base station TA，offset ·T c .

[0092] Therefore, if Figure 5 As shown, from the perspective of the interfered base station, the uplink symbol boundary of the interfered base station will be N ahead of the symbol arrival boundary of the downlink interference signal sent by the interfering base station. TA，offset ·T c +τ.

[0093] Finally, there are multiple interference sources in the network, and the distances from different strong interference sources to the interfered base station are different, which leads to higher requirements for interference removal processing.

[0094] like Figure 6 As shown, the three gray cells represent cells covered by the disturbed base station (for example, a factory in a vertical industry), and the other peripheral cells are all cells covered by the interfering base station (such as the public network).

[0095] For 30kHz subcarrier spacing, Therefore, the minimum CP length is Equivalent to 1.855×10 -6 s×3×10 8 m / s=553.5m spatial propagation delay.

[0096] That is, for a 30kHz subcarrier spacing, when the difference in distances between two interfering base stations and the interfered base station is greater than 553.5m, the difference in the first path delays between the two interfering base stations and the interfered base station is greater than 1 CP.

[0097] Obviously, a larger CP helps alleviate the problem of propagation delay differences between distant and nearby base stations.

[0098] However, a larger CP length means a larger transmission resource overhead. Figure 7 As shown, for normal CP (NCP), each time slot includes 14 symbols; while for extended CP (ECP), each time slot includes only 12 symbols. It should be noted that Figure 7 Only some symbols in a time slot are shown. Obviously, the spectrum efficiency of the extended CP is much lower than that of the normal CP.

[0099] In order to balance the conflicting requirements for CP between suppressing cross-link interference (requiring a long CP) and improving spectrum efficiency (requiring a short CP), a preferred solution is to use extended CP only in the time slots of the cross-link and use normal CP in other time slots, such as Figure 8 shown.

[0100] However, the current protocol does not support the above frame structure configuration using a hybrid CP.

[0101] In summary, due to the different service characteristics of the public network and the industry-specific network, the two use different TDD frame structure configurations. Therefore, when the two are networked at the same frequency, there will be serious cross-link interference problems.

[0102] From the perspective of the interfered base station, in order to enable interference cancellation processing, the timing deviation between the symbol boundary of the downlink signal sent by the interfering base station in the neighboring cell and the symbol boundary of the uplink signal received by the cell needs to be less than or equal to the CP length.

[0103] However, due to the preset TA offset (N TA，offset ) and the influence of spatial propagation delay between base stations. The timing deviation between the symbol boundary of the downlink signal sent by the interfering base station in the neighboring cell and the symbol boundary of the uplink signal received by the cell is much larger than the CP, resulting in a high complexity in the implementation of the interference cancellation algorithm, which will exceed the actual processing capability of the existing hardware.

[0104] To this end, the following technical solutions of the embodiments of the present application are proposed. The embodiments of the present application propose a timing adjustment and CP enhancement technology, which can ensure that when downlink signals of multiple interfering base stations within a certain distance range reach the interfered base station, the timing deviation between the uplink symbols of the interfered base station falls within the CP, which is convenient for subsequent interference elimination processing.

[0105] To facilitate understanding of the technical solutions of the embodiments of the present application, the technical solutions of the present application are described in detail below through specific embodiments. The above related technologies can be combined arbitrarily with the technical solutions of the embodiments of the present application as optional solutions, and they all belong to the protection scope of the embodiments of the present application. The embodiments of the present application include at least part of the following contents.

[0106] Fig. 9 is a flow chart of the CP determination method provided in the embodiment of the present application, such as Fig. 9 As shown, the CP determination method includes:

[0107] Step 901: The network device sends high-level signaling and / or DCI to the terminal device, and the terminal device receives the high-level signaling and / or DCI, where the high-level signaling and / or DCI are used to indicate the CP of at least one symbol.

[0108] Step 902: The terminal device determines the CP of at least one symbol according to the high-layer signaling and / or DCI.

[0109] In some optional implementations, the network device is a base station.

[0110] In some optional implementations, the high-layer signaling is RRC signaling.

[0111] In the embodiment of the present application, the terminal device determines the CP of at least one symbol according to the high-level signaling and / or DCI. The following describes how the terminal device determines the CP of at least one symbol in conjunction with the specific implementation of the high-level signaling and / or DCI.

[0112] Solution 1: DCI

[0113] In an embodiment of the present application, the DCI includes a first field; or, the DCI includes a first field and a second field; or, the DCI includes a third field; wherein the first field is a CP indication field, and the second field is a subcarrier configuration field; the third field is a CP and subcarrier configuration joint indication field; the DCI is used to schedule a first physical channel, and the first physical channel is a physical uplink shared channel (Physical Uplink Shared Channel, PUSCH) or a physical downlink shared channel (Physical Downlink Shared Channel, PDSCH).

[0114] In an embodiment of the present application, the first field in the DCI or the third field in the DCI is used by the terminal device to determine the CP configuration of the first physical channel, wherein the first physical channel occupies at least one symbol.

[0115] In an embodiment of the present application, the second field in the DCI or the third field in the DCI is used by the terminal device to determine the subcarrier spacing configuration of the first physical channel.

[0116] Different implementations of the DCI are described below.

[0117] Implementation method 1

[0118] In some optional implementations, the DCI includes a first field, and the terminal device determines the CP of at least one symbol based on the first field in the DCI.

[0119] In an embodiment of the present application, when the DCI includes a first field, the terminal device determines the CP configuration of the first physical channel according to the first field in the DCI, wherein the first physical channel occupies at least one symbol.

[0120] In an embodiment of the present application, when the DCI includes a first field, the terminal device determines the subcarrier spacing configuration of the first physical channel according to a first configuration, a default rule and at least one of the first field.

[0121] 1) In some optional implementations, if the first field indicates that the CP is a second type of CP, the terminal device expects that the subcarrier spacing configuration determined according to the first configuration is μ=2.

[0122] 2) In some optional implementations, if the first field indicates that the CP is a second type of CP, the terminal device determines that the subcarrier spacing configuration of the first physical channel is μ=2.

[0123] 3) In some optional embodiments, if the first field indicates that the CP is the second type of CP, the terminal device determines that the subcarrier spacing configuration of the first physical channel is μ=2; if the first field indicates that the CP is the first type of CP, the terminal device determines the subcarrier spacing configuration of the first physical channel according to the first configuration.

[0124] In the above solution, the first CP and the second CP are two different CP formats. In some optional implementations, the first CP is a common CP, and the second CP is an extended CP.

[0125] The above scheme is described below with reference to specific examples.

[0126] Example 1

[0127] The DCI includes a first field, which is a CP indication field, and the DCI does not include a subcarrier configuration field (ie, a second field).

[0128] The terminal device obtains the CP configuration of the PUSCH or PDSCH according to the first field. The terminal device obtains the subcarrier spacing configuration of the PUSCH or PDSCH according to its first configuration (such as BWP configuration), a default rule and at least one of the first fields.

[0129] In one embodiment, the CP indication field occupies 1 bit, wherein the value of 1 bit is 0 or 1, respectively indicating a normal CP or an extended CP. For example, the values ​​of 1 bit are 0 and 1, respectively indicating a normal CP and an extended CP, or the values ​​of 1 bit are 0 and 1, respectively indicating an extended CP and a normal CP.

[0130] In some optional implementations, the terminal device obtains the subcarrier spacing configuration of the PUSCH or PDSCH according to the first configuration (such as the BWP configuration). In one embodiment, if the first field indicates that the CP is an extended CP, the terminal device determines the subcarrier spacing configuration according to the first configuration, and the terminal device expects the subcarrier spacing configuration determined according to the first configuration to be μ=2, that is, the subcarrier spacing is 60kHz.

[0131] In some optional implementations, the terminal device obtains the subcarrier spacing configuration of the PUSCH or PDSCH according to the first field. For example, if the first field indicates that the CP is an extended CP, the terminal device determines that the subcarrier spacing configuration of the PUSCH or PDSCH is μ=2, that is, the subcarrier spacing is 60 kHz.

[0132] In some optional embodiments, if the first field indicates that the CP is an extended CP, the terminal device determines that the subcarrier spacing configuration of PUSCH or PDSCH is μ=2, that is, the subcarrier spacing is 60kHz; otherwise, if the first field indicates that the CP is a normal CP, the terminal device obtains the subcarrier spacing configuration of PUSCH or PDSCH according to the first configuration (such as BWP configuration).

[0133] Implementation method 2

[0134] In some optional implementations, the DCI includes a first field and a second field, and the terminal device determines the CP of at least one symbol based on the first field and the second field in the DCI.

[0135] In an embodiment of the present application, when the DCI includes a first field, the terminal device determines the CP configuration of the first physical channel according to the first field in the DCI, wherein the first physical channel occupies at least one symbol.

[0136] In an embodiment of the present application, when the DCI includes a second field, the terminal device determines the subcarrier spacing configuration of the first physical channel according to the second field in the DCI.

[0137] The above scheme is described below with reference to specific examples.

[0138] Example 2

[0139] The DCI includes a first field and a second field, the first field is a CP indication field, and the second field is a subcarrier configuration field.

[0140] The terminal device obtains the CP configuration of the PUSCH or PDSCH according to the first field. The terminal device obtains the subcarrier spacing configuration of the PUSCH or PDSCH according to the second field.

[0141] In one embodiment, the CP indication field occupies 1 bit, wherein the value of 1 bit is 0 or 1, respectively indicating a normal CP or an extended CP. For example, the values ​​of 1 bit are 0 and 1, respectively indicating a normal CP and an extended CP, or the values ​​of 1 bit are 0 and 1, respectively indicating an extended CP and a normal CP.

[0142] Implementation method three

[0143] In some optional implementations, the DCI includes a third field, and the terminal device determines the CP of at least one symbol based on the third field in the DCI.

[0144] In an embodiment of the present application, when the DCI includes a third field, the terminal device determines the CP configuration of the first physical channel according to the third field in the DCI, wherein the first physical channel occupies at least one symbol.

[0145] In an embodiment of the present application, when the DCI includes a third field, the terminal device determines the subcarrier spacing configuration of the first physical channel according to the third field in the DCI. Here, the value of the third field has a mapping relationship with the CP configuration and the subcarrier spacing configuration, and the mapping relationship is pre-configured or configured through high-level signaling.

[0146] The above scheme is described below with reference to specific examples.

[0147] Example 3

[0148] The DCI includes a third field, and the third field is a CP and subcarrier configuration joint indication field.

[0149] The terminal device obtains the CP configuration of PUSCH or PDSCH and the subcarrier spacing configuration of PUSCH or PDSCH according to the third field.

[0150] Here, the value of the third field has a mapping relationship with the CP configuration and the subcarrier spacing configuration. As an example, the terminal device uses the value of the third field as an index to look up the table to determine the CP configuration and the subcarrier spacing. Here, the table is a default table, or is configured through high-level signaling.

[0151] As an example, the following Table 4 is a mapping relationship table of the third field to the CP configuration and the subcarrier spacing configuration. It should be noted that the actual table may include some or all of the elements in the following Table 4.

[0152] The value of the third field Subcarrier spacing configuration (μ) CP Configuration 0 0 Ordinary CP 1 1 Ordinary CP 2 2 Ordinary CP 3 2 Extended CP 4 3 Ordinary CP 5 4 Ordinary CP

[0153] Table 4

[0154] In an embodiment of the present application, the terminal device may determine the CP configuration of the first physical channel according to the first field or the third field in the DCI. Specifically, if the first physical channel occupies one time slot, the CP configuration of the one time slot is determined; and / or, if the first physical channel occupies at least two time slots, the CP configuration of each time slot in the at least two time slots is determined, wherein the CP configuration of each time slot in the at least two time slots is the same; wherein the CP configuration of all symbols in the time slot is the same and is the CP configuration of the time slot.

[0155] For example: if PUSCH or PDSCH occupies a time slot, the terminal device determines the CP configuration of this time slot based on the first field or the third field in the DCI, and the CP configuration of each symbol in the time slot is the same, which is the CP configuration of the time slot.

[0156] For example: if PUSCH or PDSCH occupies at least two time slots, the terminal device determines the CP configuration of the two time slots according to the first field or the third field in the DCI. The CP configuration used in the two time slots is the same, and the CP configuration of each symbol in the time slot is also the same.

[0157] In an embodiment of the present application, for any time slot occupied by the first physical channel, the terminal device determines the CP length of each symbol in the time slot based on the CP configuration and / or subcarrier spacing configuration of the time slot.

[0158] In an embodiment of the present application, the CP format of the first physical channel scheduled by the DCI is the same as the CP format of the symbol where the DCI is located; or, the CP format of the first physical channel scheduled by the DCI is different from the CP format of the symbol where the DCI is located.

[0159] For example, the CP format of the PUSCH or PDSCH scheduled by the DCI is the same as the CP format of the symbol where the DCI is located. Alternatively, the CP format of the PUSCH or PDSCH scheduled by the DCI is different from the CP format of the symbol where the DCI is located.

[0160] As an example, Figure 10-1 As shown, the gray box represents the DCI that schedules the PDSCH. The symbol where the first DCI is located adopts the normal CP, and the PDSCH it schedules also adopts the normal CP; the symbol where the second DCI is located adopts the normal CP, but the PDSCH it schedules adopts the extended CP.

[0161] As an example, Figure 10-2 As shown, the gray box represents the DCI for scheduling PUSCH. The symbol where the third DCI is located adopts the normal CP, but the PUSCH scheduled by it adopts the extended CP; the symbol where the fourth DCI is located adopts the normal CP, and the PUSCH scheduled by it also adopts the normal CP.

[0162] It can be seen that based on the above scheduling method, the frame structure configuration of the hybrid CP can be implicitly implemented, that is, the extended CP is used only in the time slots of the cross link, and the ordinary CP is used in other time slots.

[0163] Solution 2: High-Level Signaling

[0164] In an embodiment of the present application, a terminal device determines a CP of at least one symbol based on high-level signaling, wherein the high-level signaling is used to indicate the CP of at least one symbol.

[0165] The following describes how a terminal device determines the CP of at least one symbol according to high-level signaling.

[0166] Implementation A

[0167] In some optional embodiments, the high-level signaling is used by the terminal device to determine the time domain period and the CP configuration list. In other words, the terminal device determines the time domain period and the CP configuration list according to the high-level signaling; wherein the time domain period includes N time slots, N is a positive integer; and the terminal device determines the CP configuration of each time slot in the N time slots according to the CP configuration list.

[0168] Specifically, the CP configuration of each time slot includes the first CP, the second CP, or the third CP.

[0169] Based on this, the terminal device determines the CP configuration of each of the N time slots according to the information included in the high-level signaling, wherein the CP configuration of all symbols in the time slot adopts the CP configuration of the time slot.

[0170] Implementation method B

[0171] In some optional embodiments, the high-level signaling is used by the terminal device to determine the time domain period and the CP configuration list. In other words, the terminal device determines the time domain period and the CP configuration list according to the high-level signaling; wherein the time domain period includes N time slots, N is a positive integer; and the terminal device determines the CP configuration of each time slot in the N time slots according to the CP configuration list.

[0172] Here, the CP configuration of each time slot includes the CP configuration of all symbols in the time slot, and the CP configuration of the symbols includes the first CP, the second CP, or the third CP; or, the CP configuration of each time slot includes a CP format index, and the CP format index is used to indicate the CP configuration of all symbols in a time slot, and the CP configuration of the symbols includes the first CP, the second CP, or the third CP.

[0173] Based on this, the terminal device determines the CP configuration of all symbols in each of the N time slots according to the information included in the high-layer signaling.

[0174] Implementation method C

[0175] In some optional embodiments, the high-level signaling is used by the terminal device to determine the time domain period, the CP configuration list and the reference subcarrier spacing configuration. In other words, the terminal device determines the time domain period, the CP configuration list and the reference subcarrier spacing configuration according to the high-level signaling; wherein the time domain period includes N time slots, N is a positive integer; the terminal device determines the CP configuration of each time slot in the N time slots according to the CP configuration list; the reference subcarrier spacing configuration is used to indicate the subcarrier spacing corresponding to the N time slots.

[0176] Specifically, the CP configuration of each time slot includes the first CP, the second CP, or the third CP.

[0177] Based on this, the terminal device determines that the first symbol is located within the second symbol according to the information included in the high-level signaling, and determines the CP configuration of the second symbol as the CP configuration of the first symbol, and the CP configuration of the second symbol adopts the CP configuration of the time slot where the second symbol is located; wherein the first symbol is a symbol corresponding to the actual subcarrier spacing, the second symbol is a symbol corresponding to the reference subcarrier spacing, and the actual subcarrier spacing is greater than or equal to the reference subcarrier spacing.

[0178] Implementation method D

[0179] In some optional embodiments, the high-level signaling is used by the terminal device to determine the time domain period, the CP configuration list and the reference subcarrier spacing configuration. In other words, the terminal device determines the time domain period, the CP configuration list and the reference subcarrier spacing configuration according to the high-level signaling; wherein the time domain period includes N time slots, N is a positive integer; the terminal device determines the CP configuration of each time slot in the N time slots according to the CP configuration list; the reference subcarrier spacing configuration is used to indicate the subcarrier spacing corresponding to the N time slots.

[0180] Specifically, the CP configuration of each time slot includes the CP configuration of all symbols in the time slot, and the CP configuration of the symbol includes the first CP, the second CP, or the third CP; or, the CP configuration of each time slot includes a CP format index, and the CP format index is used to indicate the CP configuration of all symbols in a time slot, and the CP configuration of the symbol includes the first CP, the second CP, or the third CP;

[0181] Based on this, the terminal device determines that the first symbol is located within the second symbol according to the information included in the high-level signaling, and determines the CP configuration of the second symbol as the CP configuration of the first symbol; wherein the first symbol is a symbol corresponding to the actual subcarrier spacing, the second symbol is a symbol corresponding to the reference subcarrier spacing, and the actual subcarrier spacing is greater than or equal to the reference subcarrier spacing.

[0182] In the above scheme, the first CP, the second CP and the third CP are three different CP formats. In some optional implementations, the first CP is a common CP, the second CP is an extended CP, and the third CP can be a CP longer than the extended CP. The embodiment of the present application does not limit the name of the third CP, for example, the third CP is an enhanced extended CP.

[0183] It should be noted that the technical solution of the embodiment of the present application may only include the above-mentioned solutions related to the first CP and the second CP, or may include the above-mentioned solutions related to the first CP, the second CP and the third CP.

[0184] The above solution is explained below with reference to specific examples. It should be noted that the following examples are described using solutions related to the first CP and the second CP as examples. Of course, the following examples are also applicable to solutions related to the first CP, the second CP and the third CP.

[0185] Example a

[0186] The high-level signaling is RRC signaling, and the RRC signaling includes a time domain cycle and a CP configuration list, wherein the CP configuration list includes a CP configuration of at least one time slot, and the CP configuration of each time slot includes a normal CP or an extended CP.

[0187] As an example, Fig.11 As shown, for the interfering base station, the time domain period = 5 time slots, and the CP configuration list is {normal CP, extended CP, extended CP, extended CP, normal CP}; for the disturbed base station, the time domain period = 5 time slots, and the CP configuration list is {normal CP, extended CP, extended CP, extended CP, normal CP}.

[0188] like Fig.11 As shown, in the time domain period, all symbols in a time slot adopt the same CP configuration, that is, all are normal CPs or extended CPs.

[0189] Example b

[0190] The high-level signaling is RRC signaling, which includes a time domain period, a CP configuration list, and a reference subcarrier spacing configuration. The CP configuration list includes a CP configuration for at least one time slot, and the CP configuration for each time slot includes a normal CP or an extended CP. Here, the actual subcarrier spacing is greater than or equal to the reference subcarrier spacing.

[0191] The CP configuration of a symbol using the actual subcarrier spacing adopts the CP configuration of the symbol using the reference subcarrier spacing where the symbol is located.

[0192] As an example, Fig.12 As shown in the figure, the reference subcarrier spacing is 15kHz and the actual subcarrier spacing is 30kHz. The first and second symbols of 30kHz are exactly located within the first symbol of 15kHz. Therefore, the CP configuration of the first and second symbols of 30kHz adopts the CP configuration of the first symbol of 15kHz where they are located.

[0193] Example c

[0194] The high-level signaling is RRC signaling, and the RRC signaling includes a time domain period and a CP configuration list, wherein the CP configuration list includes a CP configuration of at least one time slot, and the CP configuration of each time slot includes a CP configuration of at least one symbol.

[0195] As an example, Fig.13 As shown, for the interfering base station, the time domain period = 5 time slots, and the CP configuration list is {CP configuration of the first time slot, CP configuration of the second time slot, CP configuration of the third time slot, CP configuration of the fourth time slot, CP configuration of the fifth time slot}; wherein the CP configuration of each time slot includes the CP configuration of at least one symbol. For example,

[0196] The CP configuration of the first time slot is {normal CP, normal CP, …, normal CP};

[0197] The CP configuration of the second time slot is {normal CP, normal CP, ..., extended CP};

[0198] The CP configuration of the third time slot is {extended CP, extended CP, ..., extended CP};

[0199] The CP configuration of the fourth time slot is {extended CP, extended CP, ..., normal CP};

[0200] The CP configuration of the fifth time slot is {normal CP, normal CP, ..., normal CP}.

[0201] The above scheme can ensure that within the time domain period, all symbols in a time slot adopt independent CP configurations, and different symbols in a time slot can adopt the same or different CP configurations.

[0202] Example d

[0203] The high-level signaling is RRC signaling, which includes a time domain period, a CP configuration list, and a reference subcarrier spacing configuration. The CP configuration list includes a CP configuration for at least one time slot, and the CP configuration for each time slot includes a CP configuration for at least one symbol. Here, the actual subcarrier spacing is greater than or equal to the reference subcarrier spacing.

[0204] The CP configuration of a symbol using the actual subcarrier spacing adopts the CP configuration of the symbol using the reference subcarrier spacing where the symbol is located.

[0205] It should be noted that instance d is similar to instance b. The difference is that the solution of instance d can ensure that all symbols in a time slot adopt independent CP configurations within the time domain period, and different symbols in a time slot can adopt the same or different CP configurations.

[0206] Example

[0207] The high-level signaling is RRC signaling, which includes a time domain period and a CP configuration list, wherein the CP configuration list includes a CP configuration of at least one time slot, and the CP configuration of each time slot includes a CP format index, and a CP format index is used to determine the CP configuration of at least one symbol.

[0208] It should be noted that instance e can achieve the same CP configuration effect as instance c, that is, in the time domain period, all symbols in a time slot use independent CP configurations, and different symbols in a time slot can use the same or different CP configurations. The difference between instance e and instance c is that, in order to reduce signaling overhead, in instance e, the CP configuration of each time slot includes a CP format index.

[0209] against Fig.13 As shown in the schematic diagram, for the interfering base station, the time domain period = 5 time slots, the CP configuration list is {first CP format index, second CP format index, third CP format index, fourth CP format index, fifth CP format index}; wherein,

[0210] The first CP format index indicates that all symbols in a time slot use a common CP;

[0211] The second CP format index indicates that all symbols in a time slot adopt the following CP configuration: {normal CP, normal CP, ..., extended CP};

[0212] The third CP format index indicates that all symbols in a time slot use extended CP;

[0213] The fourth CP format index indicates that all symbols in a time slot adopt the following CP configuration: {extended CP, extended CP, ..., normal CP};

[0214] The fifth CP format index indicates that all symbols in a time slot adopt the following CP configuration: {normal CP, normal CP, ..., normal CP}.

[0215] In the above solution, the correspondence between the CP format index and the CP configuration of all symbols in a time slot is configured by other high-level signaling (such as RRC signaling).

[0216] Example f

[0217] The high-level signaling is RRC signaling, and the RRC signaling includes a time domain period, a CP configuration list, and a reference subcarrier spacing configuration. Among them, the CP configuration list includes the CP configuration of at least one time slot, and the CP configuration of each time slot includes a CP format index, and a CP format index is used to determine the CP configuration of at least one symbol. Here, the actual subcarrier spacing is greater than or equal to the reference subcarrier spacing.

[0218] The CP configuration of a symbol using the actual subcarrier spacing adopts the CP configuration of the symbol using the reference subcarrier spacing where the symbol is located.

[0219] It should be noted that instance f is similar to instance d, except that, in order to reduce signaling overhead, in instance f, the CP configuration of each time slot includes a CP format index.

[0220] In all the above schemes, the CP configuration corresponding to the symbol on which the first physical channel falls is used to transmit the first physical channel. Here, the first physical channel can carry a control signal, a service signal, or a reference signal.

[0221] Solution 3: DCI combined with high-level signaling

[0222] In an embodiment of the present application, the terminal device determines the CP of at least one symbol based on high-level signaling and DCI indication.

[0223] Here, the DCI includes at least one CP format index, each CP format index in the at least one CP format index is used to indicate the CP configuration of all symbols in a time slot, and the CP configuration of the symbol includes the first CP or the second CP or the third CP.

[0224] Here, the high-layer signaling is used to configure the corresponding relationship between each CP format index in the at least one CP format index and the CP configuration of all symbols in a time slot.

[0225] Based on this, the terminal device determines the CP configuration corresponding to at least one time slot according to the information included in the high-level signaling and the information included in the DCI, and the CP configuration corresponding to each time slot in the at least one time slot includes the CP configuration of all symbols in the time slot.

[0226] In some optional implementations, the DCI includes a CP format index, and the CP format index is used to indicate the CP configuration of time slot n+k, where time slot n is the time slot where the DCI is located.

[0227] In some optional implementations, the DCI includes M CP format indexes, where M is a positive integer greater than 1, and the M CP format indexes are used to indicate CP configurations corresponding to M-1 consecutive time slots starting from time slot n+k, where time slot n is the time slot where the DCI is located.

[0228] In some optional implementations, the DCI includes M CP format indexes, where M is a positive integer greater than 1, and the M CP format indexes are used to indicate CP configurations corresponding to multiple time slots starting from time slot n+k, where time slot n is the time slot where the DCI is located.

[0229] In the above scheme, the DCI is any one of UE-specific DCI, cell-specific DCI, or group-common DCI. In other words, the DCI is scrambled by a UE-specific RNTI, or a cell-specific RNTI, or a group-common RNTI.

[0230] In some optional implementations, k=0.

[0231] As an example, k=0, that is, the DCI includes a CP format index, and the CP format index is used to indicate the CP configuration corresponding to the time slot where the DCI is located.

[0232] As an example, k=0, that is, the DCI includes M CP format indexes, M is a positive integer greater than 1, and the M CP format indexes are used to indicate the CP configurations corresponding to M-1 consecutive time slots starting from the time slot where the DCI is located.

[0233] As an example, k=0, that is, the DCI includes M CP format indexes, M is a positive integer greater than 1, and the M CP format indexes are used to indicate CP configurations corresponding to multiple time slots starting from the time slot where the DCI is located.

[0234] In some optional implementations, the value of k is determined by at least one of DCI, RRC configuration, and MAC CE configuration.

[0235] As an example, the DCI includes a first indication field, and a value in the first indication field is a k value;

[0236] As an example, the DCI includes a second indication field, and the second indication field includes an index value. An index table from the index value to the k value is determined by at least one method of pre-agreement, RRC configuration, and MAC CE configuration. The terminal device determines the k value by querying the index table.

[0237] In the above scheme, the first CP, the second CP and the third CP are three different CP formats. In some optional implementations, the first CP is a common CP, the second CP is an extended CP, and the third CP can be a CP longer than the extended CP. The embodiment of the present application does not limit the name of the third CP, for example, the third CP is an enhanced extended CP.

[0238] It should be noted that the technical solution of the embodiment of the present application may only include the above-mentioned solutions related to the first CP and the second CP, or may include the above-mentioned solutions related to the first CP, the second CP and the third CP.

[0239] The above solution is explained below with reference to specific examples. It should be noted that the following examples are described using solutions related to the first CP and the second CP as examples. Of course, the following examples are also applicable to solutions related to the first CP, the second CP and the third CP.

[0240] Example I

[0241] The high-level signaling is RRC signaling, and the RRC signaling includes a correspondence relationship (also referred to as a mapping relationship) between at least one CP format index and a CP configuration of at least one symbol in a time slot. As an example, the RRC signaling includes a correspondence relationship between 5 CP format indices and a CP configuration of at least one symbol in a time slot, and the correspondence relationship is as follows:

[0242] The first CP format index indicates that all symbols in a time slot use a common CP;

[0243] The second CP format index indicates that all symbols in a time slot adopt the following CP configuration: {normal CP, normal CP, ..., extended CP};

[0244] The third CP format index indicates that all symbols in a time slot use extended CP;

[0245] The fourth CP format index indicates that all symbols in a time slot adopt the following CP configuration: {extended CP, extended CP, ..., normal CP};

[0246] The fifth CP format index indicates that all symbols in a time slot adopt the following CP configuration: {normal CP, normal CP, ..., normal CP}.

[0247] In one embodiment, the DCI includes a CP format index, and the CP format index is used to indicate the CP configuration of the time slot where the DCI is located.

[0248] In another embodiment, the DCI includes multiple CP format indexes, and the multiple CP format indexes are used to indicate the CP configuration of the time slot where the DCI is located and a limited number of time slots thereafter.

[0249] For example, the terminal device receives DCI in time slot n, which includes {CP format index 0, CP format index 1, CP format index 2}, indicating that the nth time slot adopts the CP configuration indicated by CP format index 0, the n+1th time slot adopts the CP configuration indicated by CP format index 1, and the n+2th time slot adopts the CP configuration indicated by CP format index 2.

[0250] In another embodiment, the DCI includes multiple CP format indexes, and the multiple CP format indexes are used to indicate the CP configuration of the time slot where the DCI is located and an infinite number of time slots thereafter.

[0251] For example, the terminal device receives DCI in time slot n, and the DCI includes {CP format index 0, CP format index 1, ..., CP format index M-1}, indicating that time slot n+m adopts the CP configuration indicated by CP format index m Mod M. Taking M=5 as an example, the CP format index adopted by the n+mth time slot is shown in Table 5 below. Yes, the CP format indexes corresponding to different time slots are repeated with M=5 time slots as a period.

[0252] m 0 1 2 3 4 5 6 7 8 9 CP format index used in the n+mth time slot 0 1 2 3 4 0 1 2 3 4

[0253] Table 5

[0254] In some optional implementations of the present application, the method further includes: the terminal device transmits an uplink frame at a first time according to the CP of the at least one symbol; wherein the first time is earlier than a first duration at a second time, the second time is a reception time of the first path of the downlink frame of the reference cell, and the first duration is determined based on the following formula:

[0255] (N TA +N TA，offset )×T c ;

[0256] Among them, N TA，offset is the timing advance offset, N TA is the uplink timing parameter, T c is the unit time of the timing advance. Here, the N TA，offset The value of N is configured through high-level signaling, where TA，offset The value of is negative.

[0257] In the above scheme, the terminal device receives the first path of the downlink frame of the reference cell before (N TA +N TA，offset )×T c Here, the terminal device can receive high-level signaling and determine N according to the high-level signaling. TA，offset The value of N TA，offset The value of can be negative.

[0258] For the network side, the network device indicates N to the terminal device. TA，offset The value of N TA，offset is the timing advance offset, N TA，offset The value of is negative.

[0259] The TA offset (N) preset in the TDD system TA，offset) and the influence of spatial propagation delay between base stations. The timing deviation between the symbol boundary of the downlink signal sent by the neighboring interfering base station arriving at the cell and the symbol boundary of the uplink signal received by the cell is much larger than the CP, resulting in a high complexity in the implementation of the interference cancellation algorithm, which will exceed the actual processing capability of the existing hardware.

[0260] In an application scenario, such as Figure 5 As shown, from the perspective of the interfered base station, the uplink symbol boundary of the interfered base station will be N ahead of the symbol arrival boundary of the downlink interference signal sent by the interfering station. TA，offset ·T c +τ, τ represents the spatial propagation delay. In order to eliminate the influence of the above TA offset, N TA，offset ·T c +τ=0, that is

[0261] In addition, in the cross-link interference scenario, N TA，offset It is related to the spatial propagation delay τ between base stations. Therefore, N TA，offset It needs to be configurable by the base station. In one example, as shown in Table 6 below, N can be configured in the high-level signaling n-TimingAdvanceOffset. TA，offset The value of is negative.

[0262]

[0263] Table 6

[0264] Among them, minusX1, minusX2, ... in the above Table 6 correspond to negative N TA，offset value.

[0265] In implementation, the network device determines the N according to the propagation distance from the second base station to itself. TA，offset The value of .

[0266] For example, the interfered base station can measure the propagation distance τ from the nearest interfering base station to itself min , and then select the value that matches -τ in the n-TimingAdvanceOffset enumeration variable value set. min The closest enumeration variable (e.g. minusXn) is used, and the variable is indicated to the terminal device through a system message or UE-specific RRC signaling.

[0267] For any of the above solutions, in some optional implementations, if the terminal device determines that the CP is the first CP according to the CP configuration of the time slot, the CP length of each symbol in the time slot is determined according to the following formula:

[0268] If l = 0 or l = 7·2μ ,but

[0269] If l≠0 and l≠7·2 μ ,but

[0270] In some optional implementations, if the terminal device determines that the CP is the second CP according to the CP configuration of the time slot, the CP length of each symbol in the time slot is determined according to the following formula:

[0271]

[0272] In some optional implementations, if the terminal device determines that the CP is the third type of CP according to the CP configuration of the time slot, the CP length of each symbol in the time slot is determined according to the following formula:

[0273]

[0274] in, is the CP length, κ=64, μ is determined based on the subcarrier spacing configuration, l is the symbol number, A is an integer, and A is not equal to 512κ·2 -μ Optionally, A>512κ·2 -μ .

[0275] In the above scheme, the first CP, the second CP and the third CP are three different CP formats. In some optional implementations, the first CP is a common CP, the second CP is an extended CP, and the third CP can be a CP longer than the extended CP. The embodiment of the present application does not limit the name of the third CP, for example, the third CP is an enhanced extended CP.

[0276] The above scheme can also be expressed by the following formula:

[0277]

[0278] It should be noted that when the CP is configured as an extended CP, the CP length of all symbols in a time slot is the same, that is, 512κ·2 -μ ; When the CP is configured as a normal CP, the CP lengths of different symbols in a time slot may be different, but the CP length of each symbol can be determined according to a preset rule (ie, the above formula).

[0279] It should be noted that the technical solution of the embodiment of the present application may only include the above-mentioned solutions related to the first CP and the second CP, or may include the above-mentioned solutions related to the first CP, the second CP and the third CP.

[0280] The technical solution of the embodiment of the present application proposes a timing adjustment and CP enhancement technology, which can ensure that when the downlink signals of multiple interfering base stations within a certain distance range reach the interfered base station, the timing deviation between the uplink symbols of the interfered base station falls within the CP, which is convenient for subsequent interference elimination processing; on the other hand, through enhanced high-level signaling and / or DCI indication, it can be ensured that the extended CP is used in the time slot of the cross-link, and the ordinary CP is used in other time slots, which meets the requirements of suppressing cross-link interference and improving spectrum efficiency.

[0281] Fig.14 The structure of the CP determination device provided in the embodiment of the present application is shown in FIG. Figure 1 , applied to terminal devices, such as Fig.14 As shown, the CP determination device includes:

[0282] The receiving unit 1401 is configured to receive high-level signaling and / or DCI, where the high-level signaling and / or DCI is used to indicate a CP of at least one symbol;

[0283] The determining unit 1402 is configured to determine a CP of at least one symbol according to the higher layer signaling and / or the DCI.

[0284] In some optional implementations, the DCI includes a first field; or, the DCI includes a first field and a second field; or, the DCI includes a third field;

[0285] Among them, the first field is a CP indication field, the second field is a subcarrier configuration field; the third field is a CP and subcarrier configuration joint indication field; the DCI is used to schedule a first physical channel, and the first physical channel is a physical uplink shared channel PUSCH or a physical downlink shared channel PDSCH.

[0286] In some optional implementations, the determination unit 1402 is used to determine the CP configuration of the first physical channel according to the first field in the DCI or the third field in the DCI, wherein the first physical channel occupies at least one symbol.

[0287] In some optional implementations, the DCI includes a first field, and the determination unit 1402 is used to determine the subcarrier spacing configuration of the first physical channel according to a first configuration, a default rule, and at least one of the first field.

[0288] In some optional implementations, if the first field indicates that the CP is the second type of CP, the terminal device expects that the subcarrier spacing configuration determined according to the first configuration is μ=2.

[0289] In some optional implementations, the determining unit 1402 is configured to determine that the subcarrier spacing configuration of the first physical channel is μ=2 if the first field indicates that the CP is a second type of CP.

[0290] In some optional embodiments, the determination unit 1402 is used to determine the subcarrier spacing configuration of the first physical channel as μ=2 if the first field indicates that the CP is the second type of CP; if the first field indicates that the CP is the first type of CP, determine the subcarrier spacing configuration of the first physical channel according to the first configuration.

[0291] In some optional implementations, the DCI includes a first field and a second field, and the determination unit 1402 is used to determine the subcarrier spacing configuration of the first physical channel according to the second field in the DCI.

[0292] In some optional implementations, the DCI includes a third field, and the determining unit 1402 is used to determine the subcarrier spacing configuration of the first physical channel according to the third field in the DCI.

[0293] In some optional implementations, the value of the third field has a mapping relationship with the CP configuration and the subcarrier spacing configuration, and the mapping relationship is pre-configured or configured through high-level signaling.

[0294] In some optional embodiments, the determination unit 1402 is used to determine the CP configuration of one time slot if the first physical channel occupies the one time slot; and / or, if the first physical channel occupies at least two time slots, determine the CP configuration of each time slot in the at least two time slots, wherein the CP configuration of each time slot in the at least two time slots is the same; wherein the CP configuration of all symbols in the time slot is the same and is the CP configuration of the time slot.

[0295] In some optional embodiments, the determination unit 1402 is used to determine, for any time slot occupied by the first physical channel, a CP length of each symbol in the time slot according to the CP configuration and / or subcarrier spacing configuration of the time slot.

[0296] In some optional implementations, the determination unit 1402 is used to determine the time domain period and the CP configuration list according to the high-level signaling; wherein the time domain period includes N time slots, N is a positive integer; and determine the CP configuration of each time slot in the N time slots according to the CP configuration list.

[0297] In some optional implementations, the CP configuration of each time slot includes a first CP, a second CP, or a third CP;

[0298] The determining unit 1402 is configured to determine the CP configuration of each of the N time slots according to the information included in the high-layer signaling, wherein the CP configuration of all symbols in the time slot adopts the CP configuration of the time slot.

[0299] In some optional implementations, the CP configuration of each time slot includes the CP configuration of all symbols in the time slot, and the CP configuration of the symbol includes the first CP, the second CP, or the third CP; or, the CP configuration of each time slot includes a CP format index, and the CP format index is used to indicate the CP configuration of all symbols in a time slot, and the CP configuration of the symbol includes the first CP, the second CP, or the third CP;

[0300] The determining unit 1402 is configured to determine the CP configuration of all symbols in each of the N time slots according to the information included in the high-layer signaling.

[0301] In some optional embodiments, the determination unit 1402 is used to determine the time domain period, the CP configuration list and the reference subcarrier spacing configuration according to the high-level signaling; wherein the time domain period includes N time slots, N is a positive integer; the CP configuration of each time slot in the N time slots is determined according to the CP configuration list; and the reference subcarrier spacing configuration is used to indicate the subcarrier spacing corresponding to the N time slots.

[0302] In some optional implementations, the CP configuration of each time slot includes a first CP, a second CP, or a third CP; the determining unit 1402 is configured to determine, according to the information included in the high-layer signaling, that the first symbol is located within the second symbol, determine the CP configuration of the second symbol as the CP configuration of the first symbol, and the CP configuration of the second symbol adopts the CP configuration of the time slot where the second symbol is located;

[0303] The first symbol is a symbol corresponding to an actual subcarrier spacing, the second symbol is a symbol corresponding to the reference subcarrier spacing, and the actual subcarrier spacing is greater than or equal to the reference subcarrier spacing.

[0304] In some optional implementations, the CP configuration of each time slot includes the CP configuration of all symbols in the time slot, and the CP configuration of the symbol includes the first CP, the second CP, or the third CP; or, the CP configuration of each time slot includes a CP format index, and the CP format index is used to indicate the CP configuration of all symbols in a time slot, and the CP configuration of the symbol includes the first CP, the second CP, or the third CP;

[0305] The determining unit 1402 is configured to determine, according to the information included in the high-layer signaling, that the first symbol is located within the second symbol, and determine the CP configuration of the second symbol as the CP configuration of the first symbol;

[0306] The first symbol is a symbol corresponding to an actual subcarrier spacing, the second symbol is a symbol corresponding to the reference subcarrier spacing, and the actual subcarrier spacing is greater than or equal to the reference subcarrier spacing.

[0307] In some optional implementations, the DCI includes at least one CP format index, each CP format index in the at least one CP format index is used to indicate the CP configuration of all symbols in a time slot, and the CP configuration of the symbol includes a first CP or a second CP or a third CP; and the high-layer signaling is used to configure the correspondence between each CP format index in the at least one CP format index and the CP configuration of all symbols in a time slot;

[0308] The determination unit 1402 is used to determine the CP configuration corresponding to at least one time slot according to the information included in the high-level signaling and the information included in the DCI, and the CP configuration corresponding to each time slot in the at least one time slot includes the CP configuration of all symbols in the time slot.

[0309] In some optional embodiments, the DCI includes a CP format index, and the CP format index is used to indicate the CP configuration of time slot n+k; or, the DCI includes M CP format indexes, M is a positive integer greater than 1, and the M CP format indexes are used to indicate the CP configuration corresponding to M-1 consecutive time slots starting from time slot n+k; or, the DCI includes M CP format indexes, M is a positive integer greater than 1, and the M CP format indexes are used to indicate the CP configuration corresponding to multiple time slots starting from time slot n+k; wherein, time slot n is the time slot where the DCI is located.

[0310] In some optional implementations, k=0; or, the value of k is determined by at least one of DCI, RRC configuration, and MAC CE configuration.

[0311] In some optional implementations, the determining unit 1402 is configured to determine the CP length of each symbol in the time slot according to the following formula if the CP is determined to be the first CP according to the CP configuration of the time slot:

[0312] If l = 0 or l = 7·2 μ ,but

[0313] If l≠0 and l≠7·2 μ ,but

[0314] If the CP is determined to be the second type of CP according to the CP configuration of the time slot, the CP length of each symbol in the time slot is determined according to the following formula:

[0315]

[0316] If the CP is determined to be the third type of CP according to the CP configuration of the time slot, the CP length of each symbol in the time slot is determined according to the following formula:

[0317]

[0318] in, is the CP length, κ=64, μ is determined based on the subcarrier spacing configuration, l is the symbol number, A is an integer, and A is not equal to 512κ·2 -μ .

[0319] In some optional implementations, the CP format of the first physical channel scheduled by the DCI is the same as the CP format of the symbol where the DCI is located; or, the CP format of the first physical channel scheduled by the DCI is different from the CP format of the symbol where the DCI is located.

[0320] In some optional implementations, the device further includes: a transmission unit 1403, configured to transmit an uplink frame at a first time according to the CP of the at least one symbol; wherein,

[0321] The first time is earlier than the second time by a first duration, the second time is the reception time of the first path of the downlink frame of the reference cell, and the first duration is determined based on the following formula:

[0322] (N TA +N TA，offset )×T c ;

[0323] Among them, N TA，offset is the timing advance offset, N TA is the uplink timing parameter, T c The unit time of the timing advance.

[0324] In some optional embodiments, the N TA，offset The value of N is configured through high-level signaling, where TA，offset The value of is negative.

[0325] Those skilled in the art should understand that Fig.14 The implementation functions of each unit in the CP determination device shown can be understood by referring to the relevant description of the aforementioned method. Fig.14The functions of each unit in the CP determination device shown can be implemented by a program running on a processor, or by a specific logic circuit.

[0326] Fig.15 The structure of the CP determination device provided in the embodiment of the present application is shown in FIG. Figure 2 , applied to network equipment, such as Fig.15 As shown, the CP determination device includes:

[0327] The sending unit 1501 is used to send high-layer signaling and / or DCI to the terminal device, where the high-layer signaling and / or DCI is used to indicate the CP of at least one symbol.

[0328] In some optional implementations, the DCI includes a first field; or, the DCI includes a first field and a second field; or, the DCI includes a third field;

[0329] Among them, the first field is a CP indication field, the second field is a subcarrier configuration field; the third field is a CP and subcarrier configuration joint indication field; the DCI is used to schedule a first physical channel, and the first physical channel is PUSCH or PDSCH.

[0330] In some optional embodiments, the first field in the DCI or the third field in the DCI is used by the terminal device to determine the CP configuration of the first physical channel, wherein the first physical channel occupies at least one symbol.

[0331] In some optional embodiments, the second field in the DCI or the third field in the DCI is used by the terminal device to determine the subcarrier spacing configuration of the first physical channel.

[0332] In some optional implementations, the CP format of the first physical channel scheduled by the DCI is the same as the CP format of the symbol where the DCI is located; or,

[0333] The CP format of the first physical channel scheduled by the DCI is different from the CP format of the symbol where the DCI is located.

[0334] In some optional embodiments, the high-level signaling is used by the terminal device to determine a time domain period and a CP configuration list; wherein the time domain period includes N time slots, N is a positive integer; and the CP configuration list is used to determine the CP configuration of each time slot in the N time slots.

[0335] In some optional implementations, the CP configuration of each time slot includes the first CP, the second CP, or the third CP.

[0336] In some optional embodiments, the CP configuration of each time slot includes the CP configuration of all symbols in the time slot, and the CP configuration of the symbols includes the first CP, the second CP, or the third CP; or, the CP configuration of each time slot includes a CP format index, and the CP format index is used to indicate the CP configuration of all symbols in a time slot, and the CP configuration of the symbols includes the first CP, the second CP, or the third CP.

[0337] In some optional embodiments, the high-level signaling is used by the terminal device to determine the time domain period, the CP configuration list and the reference subcarrier spacing configuration; wherein the time domain period includes N time slots, N is a positive integer; the CP configuration list is used to determine the CP configuration of each time slot in the N time slots; and the reference subcarrier spacing configuration is used to indicate the subcarrier spacing corresponding to the N time slots.

[0338] In some optional implementations, the CP configuration of each time slot includes the first CP, the second CP, or the third CP.

[0339] In some optional embodiments, the CP configuration of each time slot includes the CP configuration of all symbols in the time slot, and the CP configuration of the symbols includes the first CP, the second CP, or the third CP; or, the CP configuration of each time slot includes a CP format index, and the CP format index is used to indicate the CP configuration of all symbols in a time slot, and the CP configuration of the symbols includes the first CP, the second CP, or the third CP.

[0340] In some optional embodiments, the DCI includes at least one CP format index, each CP format index in the at least one CP format index is used to indicate the CP configuration of all symbols in a time slot, and the CP configuration of the symbol includes a first CP or a second CP or a third CP; and the high-level signaling is used to configure the correspondence between each CP format index in the at least one CP format index and the CP configuration of all symbols in a time slot.

[0341] In some optional embodiments, the DCI includes a CP format index, and the CP format index is used to indicate the CP configuration of time slot n+k; or, the DCI includes M CP format indexes, M is a positive integer greater than 1, and the M CP format indexes are used to indicate the CP configuration corresponding to M-1 consecutive time slots starting from time slot n+k; or, the DCI includes M CP format indexes, M is a positive integer greater than 1, and the M CP format indexes are used to indicate the CP configuration corresponding to multiple time slots starting from time slot n+k; wherein, time slot n is the time slot where the DCI is located.

[0342] In some optional implementations, k=0; or, the value of k is determined by at least one of DCI, RRC configuration, and MAC CE configuration.

[0343] In some optional implementations, the sending unit 1501 is further configured to indicate to the terminal device that N TA，offset The value of N TA，offset is the timing advance offset, N TA，offset The value of is negative.

[0344] In some optional implementations, the device further includes: a determining unit, configured to determine the N according to a propagation distance from the second base station to itself. TA，offset The value of .

[0345] Those skilled in the art should understand that Fig.15 The implementation functions of each unit in the CP determination device shown can be understood by referring to the relevant description of the aforementioned method. Fig.15 The functions of each unit in the CP determination device shown can be implemented by a program running on a processor, or by a specific logic circuit.

[0346] Fig.16 1600 is a schematic structural diagram of a communication device 1600 provided in an embodiment of the present application. The communication device may be a terminal device or a network device. Fig.16 The communication device 1600 shown includes a processor 1610, which can call and run a computer program from a memory to implement the method in the embodiment of the present application.

[0347] Alternatively, if Fig.16 As shown, the communication device 1600 may further include a memory 1620. The processor 1610 may call and run a computer program from the memory 1620 to implement the method in the embodiment of the present application.

[0348] The memory 1620 may be a separate device independent of the processor 1610 , or may be integrated into the processor 1610 .

[0349] Alternatively, if Fig.16 As shown, the communication device 1600 may further include a transceiver 1630, and the processor 1610 may control the transceiver 1630 to communicate with other devices, specifically, may send information or data to other devices, or receive information or data sent by other devices.

[0350] The transceiver 1630 may include a transmitter and a receiver. The transceiver 1630 may further include an antenna, and the number of antennas may be one or more.

[0351] Optionally, the communication device 1600 may specifically be a network device of an embodiment of the present application, and the communication device 1600 may implement corresponding processes implemented by the network device in each method of the embodiment of the present application, which will not be described in detail here for the sake of brevity.

[0352] Optionally, the communication device 1600 may specifically be a mobile terminal / terminal device of an embodiment of the present application, and the communication device 1600 may implement the corresponding processes implemented by the mobile terminal / terminal device in each method of the embodiment of the present application, which will not be described in detail here for the sake of brevity.

[0353] Fig.17 It is a schematic structural diagram of the chip of an embodiment of the present application. Fig.17 The chip 1700 shown includes a processor 1710, which can call and run a computer program from a memory to implement the method in the embodiment of the present application.

[0354] Alternatively, if Fig.17 As shown, the chip 1700 may further include a memory 1720. The processor 1710 may call and run a computer program from the memory 1720 to implement the method in the embodiment of the present application.

[0355] The memory 1720 may be a separate device independent of the processor 1710 , or may be integrated into the processor 1710 .

[0356] Optionally, the chip 1700 may further include an input interface 1730. The processor 1710 may control the input interface 1730 to communicate with other devices or chips, and specifically, may obtain information or data sent by other devices or chips.

[0357] Optionally, the chip 1700 may further include an output interface 1740. The processor 1710 may control the output interface 1740 to communicate with other devices or chips, and specifically, may output information or data to other devices or chips.

[0358] Optionally, the chip can be applied to the network device in the embodiments of the present application, and the chip can implement the corresponding processes implemented by the network device in each method of the embodiments of the present application. For the sake of brevity, they will not be repeated here.

[0359] Optionally, the chip can be applied to the mobile terminal / terminal device in the embodiments of the present application, and the chip can implement the corresponding processes implemented by the mobile terminal / terminal device in the various methods of the embodiments of the present application. For the sake of brevity, they will not be repeated here.

[0360] It should be understood that the chip mentioned in the embodiments of the present application can also be called a system-level chip, a system chip, a chip system or a system-on-chip chip, etc.

[0361] It should be understood that the processor of the embodiment of the present application may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method embodiment can be completed by the hardware integrated logic circuit or software instructions in the processor. The above processor can be a general processor, a digital signal processor (Digital Signal Processor, DSP), an application-specific integrated circuit (Application Specific Integrated Circuit, ASIC), a field programmable gate array (Field Programmable Gate Array, FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components. The methods, steps and logic block diagrams disclosed in the embodiments of the present application can be implemented or executed. The general processor can be a microprocessor or the processor can also be any conventional processor. The steps of the method disclosed in the embodiment of the present application can be directly embodied as a hardware decoding processor to perform, or the hardware and software modules in the decoding processor are combined and performed. The software module can be located in a random access memory, a flash memory, a read-only memory, a programmable read-only memory or an electrically erasable programmable memory, a register, and other mature storage media in the art. The storage medium is located in the memory, and the processor reads the information in the memory and completes the steps of the above method in combination with its hardware.

[0362] It can be understood that the memory in the embodiments of the present application can be a volatile memory or a non-volatile memory, or can include both volatile and non-volatile memories. Among them, the non-volatile memory can be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory can be a random access memory (RAM), which is used as an external cache. By way of example and not limitation, many forms of RAM are available, such as static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM), and direct RAM bus random access memory (DR RAM). It should be noted that the memory of the systems and methods described herein is intended to include, but is not limited to, these and any other suitable types of memory.

[0363] It should be understood that the above-mentioned memory is exemplary but not restrictive. For example, the memory in the embodiments of the present application may also be static random access memory (static RAM, SRAM), dynamic random access memory (dynamic RAM, DRAM), synchronous dynamic random access memory (synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (double data rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), synchronous link dynamic random access memory (synch link DRAM, SLDRAM) and direct memory bus random access memory (Direct Rambus RAM, DR RAM), etc. That is to say, the memory in the embodiments of the present application is intended to include but not limited to these and any other suitable types of memory.

[0364] An embodiment of the present application also provides a computer-readable storage medium for storing a computer program.

[0365] Optionally, the computer-readable storage medium can be applied to the network device in the embodiments of the present application, and the computer program enables the computer to execute the corresponding processes implemented by the network device in the various methods of the embodiments of the present application. For the sake of brevity, they are not repeated here.

[0366] Optionally, the computer-readable storage medium can be applied to the mobile terminal / terminal device in the embodiments of the present application, and the computer program enables the computer to execute the corresponding processes implemented by the mobile terminal / terminal device in the various methods of the embodiments of the present application. For the sake of brevity, they are not repeated here.

[0367] An embodiment of the present application also provides a computer program product, including computer program instructions.

[0368] Optionally, the computer program product can be applied to the network device in the embodiments of the present application, and the computer program instructions enable the computer to execute the corresponding processes implemented by the network device in the various methods of the embodiments of the present application. For the sake of brevity, they are not repeated here.

[0369] Optionally, the computer program product can be applied to the mobile terminal / terminal device in the embodiments of the present application, and the computer program instructions enable the computer to execute the corresponding processes implemented by the mobile terminal / terminal device in the various methods of the embodiments of the present application. For the sake of brevity, they are not repeated here.

[0370] The embodiment of the present application also provides a computer program.

[0371] Optionally, the computer program can be applied to the network device in the embodiments of the present application. When the computer program runs on a computer, the computer executes the corresponding processes implemented by the network device in the various methods in the embodiments of the present application. For the sake of brevity, they are not described here.

[0372] Optionally, the computer program can be applied to the mobile terminal / terminal device in the embodiments of the present application. When the computer program runs on the computer, the computer executes the corresponding processes implemented by the mobile terminal / terminal device in the various methods of the embodiments of the present application. For the sake of brevity, they are not repeated here.

[0373] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0374] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0375] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0376] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0377] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0378] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application can be essentially or partly embodied in the form of a software product that contributes to the prior art. The computer software product is stored in a storage medium and includes several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in each embodiment of the present application. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0379] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A method for determining a cyclic prefix CP, characterized in that: The method comprises: The terminal device receives high-layer signaling and / or downlink control information DCI, where the high-layer signaling and / or DCI is used to indicate a CP of at least one symbol; The terminal device determines a CP of at least one symbol according to the high-layer signaling and / or the DCI; The method further comprises: The terminal device determines a time domain period and a CP configuration list according to the high-level signaling; wherein the time domain period includes N time slots, and N is a positive integer; The terminal device determines the CP configuration of each time slot in the N time slots according to the CP configuration list; The DCI includes at least one CP format index, each of the at least one CP format index is used to indicate the CP configuration of all symbols in a time slot, and the CP configuration of the symbol includes any one of a first CP, a second CP, and a third CP; and the high-layer signaling is used to configure the correspondence between each CP format index in the at least one CP format index and the CP configuration of all symbols in a time slot; The terminal device determines, according to the high-layer signaling and the DCI, a CP of at least one symbol, including: The terminal device determines the CP configuration corresponding to at least one time slot according to the information included in the high-layer signaling and the information included in the DCI, and the CP configuration corresponding to each time slot in the at least one time slot includes the CP configuration of all symbols in the time slot.

2. The method according to claim 1, characterized in that The DCI includes a first field; or, The DCI includes a first field and a second field; or, The DCI includes a third field; Among them, the first field is a CP indication field, the second field is a subcarrier configuration field; the third field is a CP and subcarrier configuration joint indication field; the DCI is used to schedule a first physical channel, and the first physical channel is a physical uplink shared channel PUSCH or a physical downlink shared channel PDSCH.

3. The method according to claim 2, characterized in that The terminal device determines, according to the DCI, a CP of at least one symbol, including: The terminal device determines the CP configuration of the first physical channel according to the first field in the DCI or the third field in the DCI, wherein the first physical channel occupies at least one symbol.

4. The method according to claim 3, characterized in that The determining the CP configuration of the first physical channel includes: If the first physical channel occupies one time slot, determining a CP configuration of the one time slot; and / or, If the first physical channel occupies at least two time slots, determining a CP configuration of each of the at least two time slots, wherein the CP configuration of each of the at least two time slots is the same; The CP configurations of all symbols in the time slot are the same and are the CP configurations of the time slot.

5. The method according to claim 2, characterized in that: The method further comprises: The terminal device determines the subcarrier spacing configuration of the first physical channel according to at least one of the first configuration, the default rule and the first field; or, The terminal device determines the subcarrier spacing configuration of the first physical channel according to the second field in the DCI; or, The terminal device determines the subcarrier spacing configuration of the first physical channel according to the third field in the DCI.

6. The method according to claim 1, characterized in that The CP configuration of each time slot includes any one of a first CP, a second CP, and a third CP; The terminal device determines, according to the high-layer signaling, a CP of at least one symbol, including: The terminal device determines the CP configuration of each of the N time slots based on the information included in the high-layer signaling, wherein the CP configuration of all symbols in the time slot adopts the CP configuration of the time slot.

7. The method according to claim 1, characterized in that The CP configuration of each time slot includes the CP configuration of all symbols in the time slot, and the CP configuration of the symbols includes any one of a first CP, a second CP, and a third CP; or, The CP configuration of each time slot includes a CP format index, where the CP format index is used to indicate the CP configuration of all symbols in a time slot, where the CP configuration of the symbol includes any one of a first CP, a second CP, and a third CP; The terminal device determines, according to the high-layer signaling, a CP of at least one symbol, including: The terminal device determines the CP configuration of all symbols in each of the N time slots based on the information included in the high-layer signaling.

8. The method according to claim 1, characterized in that The method further comprises: The terminal device determines a reference subcarrier spacing configuration according to the high-level signaling; the reference subcarrier spacing configuration is used to indicate the subcarrier spacing corresponding to the N time slots.

9. The method according to claim 8, characterized in that The CP configuration of each time slot includes any one of a first CP, a second CP, and a third CP; The terminal device determines, according to the high-layer signaling, a CP of at least one symbol, including: The terminal device determines, according to the information included in the high-layer signaling, that the first symbol is located within the second symbol, determines the CP configuration of the second symbol as the CP configuration of the first symbol, and the CP configuration of the second symbol adopts the CP configuration of the time slot where the second symbol is located; The first symbol is a symbol corresponding to an actual subcarrier spacing, the second symbol is a symbol corresponding to the reference subcarrier spacing, and the actual subcarrier spacing is greater than or equal to the reference subcarrier spacing.

10. The method according to claim 8, characterized in that The CP configuration of each time slot includes the CP configuration of all symbols in the time slot, and the CP configuration of the symbols includes any one of a first CP, a second CP, and a third CP; or, The CP configuration of each time slot includes a CP format index, where the CP format index is used to indicate the CP configuration of all symbols in a time slot, where the CP configuration of the symbol includes the first CP, the second CP, or the third CP; The terminal device determines, according to the high-layer signaling, a CP of at least one symbol, including: The terminal device determines, according to the information included in the high-layer signaling, that the first symbol is located within the second symbol, and determines the CP configuration of the second symbol as the CP configuration of the first symbol; The first symbol is a symbol corresponding to an actual subcarrier spacing, the second symbol is a symbol corresponding to the reference subcarrier spacing, and the actual subcarrier spacing is greater than or equal to the reference subcarrier spacing.

11. The method according to claim 1, characterized in that: The DCI includes a CP format index, where the CP format index is used to indicate the CP configuration of time slot n+k; or, The DCI includes M CP format indexes, where M is a positive integer greater than 1, and the M CP format indexes are used to indicate CP configurations corresponding to M-1 consecutive time slots starting from time slot n+k; or, The DCI includes M CP format indexes, where M is a positive integer greater than 1, and the M CP format indexes are used to indicate CP configurations corresponding to multiple time slots starting from time slot n+k; Among them, time slot n is the time slot where the DCI is located.

12. The method according to claim 11, characterized in that k=0; or The value of k is determined by at least one of DCI, RRC configuration, and MACCE configuration.

13. The method according to any one of claims 1, 4, 6 to 12, characterized in that The method further comprises: The terminal device determines the CP length of each symbol in the time slot according to the CP configuration and / or subcarrier spacing configuration of the time slot.

14. The method according to claim 13, characterized in that The terminal device determines, according to the CP configuration and / or the subcarrier spacing configuration of the time slot, the CP length of each symbol in the time slot, including: If the terminal device determines that the CP is the first type of CP according to the CP configuration of the time slot, the CP length of each symbol in the time slot is determined according to the following formula: If l = 0 or l = 7·2 μ ,but If l≠0 and l≠7·2 μ ,but And / or, if the terminal device determines that the CP is the second CP according to the CP configuration of the time slot, the CP length of each symbol in the time slot is determined according to the following formula: And / or, if the terminal device determines that the CP is a third type of CP according to the CP configuration of the time slot, the CP length of each symbol in the time slot is determined according to the following formula: in, is the CP length, κ=64, μ is determined based on the subcarrier spacing configuration, l is the symbol number, A is an integer, and A is not equal to 512κ·2 -μ .

15. The method according to any one of claims 1 to 12, characterized in that The CP format of the first physical channel scheduled by the DCI is the same as the CP format of the symbol where the DCI is located; or, The CP format of the first physical channel scheduled by the DCI is different from the CP format of the symbol where the DCI is located.

16. The method according to any one of claims 1 to 12, characterized in that The method further comprises: The terminal device transmits an uplink frame at a first moment according to the CP of the at least one symbol; wherein, The first time is earlier than the second time by a first duration, the second time is the reception time of the first path of the downlink frame of the reference cell, and the first duration is determined based on the following formula: (N TA +N TA,offset )×T c ; Among them, N TA,offset is the timing advance offset, N TA is the uplink timing parameter, T c The unit time of the timing advance.

17. The method according to claim 16, characterized in that The N TA,offset The value of N is configured through high-level signaling, where TA,offset The value of is negative.

18. A CP determination method, characterized in that: The method comprises: The network device sends a high-layer signaling and / or a DCI to the terminal device, where the high-layer signaling and / or the DCI is used to indicate a CP of at least one symbol; The high-level signaling is used by the terminal device to determine a time domain period and a CP configuration list; wherein the time domain period includes N time slots, N is a positive integer; and the CP configuration list is used to determine the CP configuration of each time slot in the N time slots; The DCI includes at least one CP format index, each CP format index in the at least one CP format index is used to indicate the CP configuration of all symbols in a time slot, and the CP configuration of the symbol includes a first CP, a second CP, or a third CP; and the high-level signaling is used to configure the correspondence between each CP format index in the at least one CP format index and the CP configuration of all symbols in a time slot.

19. The method according to claim 18, characterized in that The DCI includes a first field; or, The DCI includes a first field and a second field; or, The DCI includes a third field; Among them, the first field is a CP indication field, the second field is a subcarrier configuration field; the third field is a CP and subcarrier configuration joint indication field; the DCI is used to schedule a first physical channel, and the first physical channel is PUSCH or PDSCH.

20. The method according to claim 19, characterized in that The first field in the DCI or the third field in the DCI is used by the terminal device to determine the CP configuration of the first physical channel, wherein the first physical channel occupies at least one symbol.

21. The method according to claim 19, characterized in that The second field in the DCI or the third field in the DCI is used by the terminal device to determine the subcarrier spacing configuration of the first physical channel.

22. The method according to claim 18, characterized in that The CP configuration of each time slot includes the first CP, the second CP, or the third CP.

23. The method according to claim 18, characterized in that The CP configuration of each time slot includes the CP configuration of all symbols in the time slot, and the CP configuration of the symbols includes the first CP, the second CP, or the third CP; or, The CP configuration of each time slot includes a CP format index, where the CP format index is used to indicate the CP configuration of all symbols in a time slot, where the CP configuration of the symbol includes the first CP, the second CP, or the third CP.

24. The method according to claim 18, characterized in that The high-level signaling is used by the terminal device to determine a reference subcarrier spacing configuration; the reference subcarrier spacing configuration is used to indicate the subcarrier spacing corresponding to the N time slots.

25. The method according to claim 24, characterized in that The CP configuration of each time slot includes the first CP, the second CP, or the third CP.

26. The method according to claim 24, characterized in that The CP configuration of each time slot includes the CP configuration of all symbols in the time slot, and the CP configuration of the symbols includes the first CP, the second CP, or the third CP; or, The CP configuration of each time slot includes a CP format index, where the CP format index is used to indicate the CP configuration of all symbols in a time slot, where the CP configuration of the symbol includes the first CP, the second CP, or the third CP.

27. The method according to claim 18, characterized in that The DCI includes a CP format index, where the CP format index is used to indicate the CP configuration of time slot n+k; or, The DCI includes M CP format indexes, where M is a positive integer greater than 1, and the M CP format indexes are used to indicate CP configurations corresponding to M-1 consecutive time slots starting from time slot n+k; or, The DCI includes M CP format indexes, where M is a positive integer greater than 1, and the M CP format indexes are used to indicate CP configurations corresponding to multiple time slots starting from time slot n+k; Among them, time slot n is the time slot where the DCI is located.

28. The method according to claim 27, characterized in that k=0; or The value of k is determined by at least one of DCI, RRC configuration, and MACCE configuration.

29. The method according to any one of claims 18 to 28, characterized in that The CP format of the first physical channel scheduled by the DCI is the same as the CP format of the symbol where the DCI is located; or, The CP format of the first physical channel scheduled by the DCI is different from the CP format of the symbol where the DCI is located.

30. The method according to any one of claims 18 to 28, characterized in that The method further comprises: The network device indicates N to the terminal device TA,offset The value of N TA,offset is the timing advance offset, N TA,offset The value of is negative.

31. The method according to claim 30, characterized in that The method further comprises: The network device determines the N according to the propagation distance from the second base station to itself. TA,offset The value of .

32. A CP determination device, applied to a terminal device, comprising: A receiving unit, configured to receive high-level signaling and / or DCI, wherein the high-level signaling and / or DCI is used to indicate a CP of at least one symbol; A determining unit, configured to determine a CP of at least one symbol according to the high-layer signaling and / or the DCI; The determining unit is configured to determine a time domain period and a CP configuration list according to the high-level signaling; wherein the time domain period includes N time slots, where N is a positive integer; and determine a CP configuration of each time slot in the N time slots according to the CP configuration list; The DCI includes at least one CP format index, each of the at least one CP format index is used to indicate the CP configuration of all symbols in a time slot, and the CP configuration of the symbol includes any one of a first CP, a second CP, and a third CP; and the high-layer signaling is used to configure the correspondence between each CP format index in the at least one CP format index and the CP configuration of all symbols in a time slot; The determination unit is used to determine the CP configuration corresponding to at least one time slot according to the information included in the high-layer signaling and the information included in the DCI, and the CP configuration corresponding to each time slot in the at least one time slot includes the CP configuration of all symbols in the time slot.

33. A CP determination device, applied to a network device, comprising: A sending unit, configured to send high-layer signaling and / or DCI to a terminal device, wherein the high-layer signaling and / or DCI is used to indicate a CP of at least one symbol; The high-level signaling is used by the terminal device to determine a time domain period and a CP configuration list; wherein the time domain period includes N time slots, N is a positive integer; and the CP configuration list is used to determine the CP configuration of each time slot in the N time slots; The DCI includes at least one CP format index, each CP format index in the at least one CP format index is used to indicate the CP configuration of all symbols in a time slot, and the CP configuration of the symbol includes a first CP, a second CP, or a third CP; and the high-level signaling is used to configure the correspondence between each CP format index in the at least one CP format index and the CP configuration of all symbols in a time slot.

34. A terminal device, characterized in that: include: A processor and a memory, the memory being used to store a computer program, the processor being used to call and run the computer program stored in the memory to execute the method according to any one of claims 1 to 17.

35. A network device, characterized in that: include: A processor and a memory, the memory being used to store a computer program, the processor being used to call and run the computer program stored in the memory to execute the method as claimed in any one of claims 18 to 31.

36. A chip, characterized in that: include: A processor, configured to call and run a computer program from a memory, so that a device equipped with the chip executes a method as claimed in any one of claims 1 to 17, or a method as claimed in any one of claims 18 to 31.

37. A computer-readable storage medium, characterized in that: Used to store a computer program, wherein the computer program causes a computer to execute the method according to any one of claims 1 to 17, or the method according to any one of claims 18 to 31.

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