Communication method and device

Abstract

A communication method and device, relating to the technical field of communications, used for solving the problem of a waste of resources caused by large delay of switching between downlink reception and uplink transmission. The method may comprise: a communication device determining a first symbol, wherein the first symbol comprises a first interval, and further comprises a second interval and / or a third interval, the first interval is used for switching between downlink transmission and uplink transmission, and is used as a reserved resource or a guard interval, the second interval is used for uplink transmission, and the third interval is used for downlink transmission; and sending first indication information, wherein the first indication information is used for indicating the first symbol.

Description

Communication method and device Technical Field

[0001] The present application relates to the field of communication technology, and in particular to a communication method and device. Background Art

[0002] With the advancement of wireless communication technology, the fifth generation mobile communication technology (5G) is now placing higher data transmission requirements on systems, such as higher throughput, lower latency, higher reliability, and a larger number of connections. To meet these transmission requirements, technologies such as enhanced mobile broadband (eMBB), ultra-reliable and low-latency communications (URLLC), and massive machine type communications (mMTC) have been proposed based on 5G communication systems.

[0003] The existing frame structure includes uplink and downlink symbols, which can be used for uplink and downlink transmission, respectively. Reserved resources, such as a guard period (GP), are required between downlink and uplink symbols to facilitate the transition between downlink reception and uplink transmission at the receiving end. For example, a timeslot can contain 14 symbols, and there can be a maximum of two downlink-to-uplink transitions within a timeslot. These two transitions involve two GP symbols, and the overhead of these two GP symbols is equal to one-seventh of a timeslot.

[0004] A GP includes the round-trip time (RTT) between the transmitter and receiver, as well as the uplink and downlink conversion delay at the receiver. For some communication scenarios requiring low latency, such as URLLC factory scenarios, the distance between the transmitter and receiver devices is relatively short, resulting in a relatively small RTT. However, the existing frame structure requires excessively high reserved resource overhead, leading to significant latency.

[0005] Summary of the Invention

[0006] The embodiments of the present application provide a communication method and apparatus for solving the problem of large conversion delay from downlink transmission to uplink transmission and waste of resources.

[0007] To achieve the above objectives, this application adopts the following technical solutions:

[0008] In a first aspect, a communication method is provided, the method comprising: determining a first symbol, the first symbol comprising a first interval and a second interval, or comprising a first interval and a third interval, or comprising a first interval, a second interval and a third interval, wherein the first interval is used to realize the conversion from downlink transmission to uplink transmission, as a reserved resource or a protection interval, the second interval is used for uplink transmission, and the third interval is used for downlink transmission; sending first indication information, the first indication information being used to indicate the first symbol.

[0009] In the above implementation, a new symbol such as the first symbol is defined as a partial OFDM symbol. The transmitting end sends the partial OFDM symbol in the time domain, and the receiving end recovers the complete frequency domain signal based on the partial OFDM symbol. The remaining time domain part can be used as a reserved resource or a protection interval to realize the delay of the uplink and downlink conversion, thereby reducing the GP overhead and reducing the delay.

[0010] In one embodiment, the first indication information is used to indicate at least one of the following: the starting position of the first interval in the first symbol, the duration corresponding to the first interval, the ratio of the duration of the first interval to the duration of the first symbol, the duration occupied by the second interval in the first symbol, the ratio of the duration of the second interval to the duration of the first symbol, the duration occupied by the third interval in the first symbol, or the ratio of the duration of the third interval to the duration of the first symbol.

[0011] In one embodiment, the first symbol is preconfigured as follows: the starting position of the first interval is the starting position of the first symbol, or the ending position of the first interval is the ending position of the first symbol, or the starting position or the ending position of the first interval is the middle position of the first symbol, or the starting position and / or the ending position of the first interval is other positions in the first symbol except the starting position and the ending position.

[0012] In one embodiment, the first indication information includes a first index value, which corresponds to a first position and a first duration; wherein the first position is used to indicate the starting position of the first interval in the first symbol, and the first duration is used to indicate the duration of the first interval in the first symbol; or, the first indication information includes a second index value, which corresponds to a second duration and a third duration; wherein the second duration is used to indicate the duration of the third interval in the first symbol, and the third duration is used to indicate the duration of the second interval in the first symbol.

[0013] In one embodiment, the first indication information is carried in at least one of the following: system information block SIB1, radio resource control RRC signal, downlink control information DCI, sidelink control information SCI, other physical layer signaling or other high layer signaling.

[0014] In one embodiment, the method further includes: receiving capability information of the first device, where the capability information is used to indicate whether the first device supports the first symbol and / or the type of the supported first symbol.

[0015] In one embodiment, the capability information includes at least one of the following: information on whether the first device supports the first symbol, information on the first symbol type supported by the first device, information on the conversion period supported by the first device, or information on the capability of the first device to convert a received downlink signal into a sent uplink signal.

[0016] In a second aspect, a communication method is provided, which includes: receiving first indication information, where the first indication information is used to indicate a first symbol, where the first symbol includes a first interval and a second interval, or includes a first interval and a third interval, or includes a first interval, a second interval and a third interval, wherein the first interval is used to realize the conversion from downlink transmission to uplink transmission, as a reserved resource or a protection interval, the second interval is used for uplink transmission, and the third interval is used for downlink transmission; and determining the first symbol based on the first indication information.

[0017] In one embodiment, the first indication information is used to indicate at least one of the following: the starting position of the first interval in the first symbol, the duration corresponding to the first interval, the ratio of the duration of the first interval to the duration of the first symbol, the duration occupied by the second interval in the first symbol, the ratio of the duration of the second interval to the duration of the first symbol, the duration occupied by the third interval in the first symbol, or the ratio of the duration of the third interval to the duration of the first symbol.

[0018] In one embodiment, the first symbol is preconfigured as follows: the starting position of the first interval is the starting position of the first symbol, or the ending position of the first interval is the ending position of the first symbol, or the starting position or the ending position of the first interval is the middle position of the first symbol, or the starting position and / or the ending position of the first interval is other positions in the first symbol except the starting position and the ending position.

[0019] In one embodiment, the first indication information includes a first index value, which corresponds to a first position and a first duration; wherein the first position is used to indicate the starting position of the first interval in the first symbol, and the first duration is used to indicate the duration of the first interval in the first symbol; or, the first indication information includes a second index value, which corresponds to a second duration and a third duration; wherein the second duration is used to indicate the duration of the third interval in the first symbol, and the third duration is used to indicate the duration of the second interval in the first symbol.

[0020] In one embodiment, the first indication information is carried in at least one of the following: system information block SIB1, radio resource control RRC signal, downlink control information DCI, sidelink control information SCI, other physical layer signaling or other high layer signaling.

[0021] In one embodiment, the method further includes: sending capability information, where the capability information is used to indicate whether the first device supports the first symbol and / or the type of the supported first symbol.

[0022] In one embodiment, the capability information includes at least one of the following: information on whether the first device supports the first symbol, information on the first symbol type supported by the first device, information on the conversion period supported by the first device, or information on the capability of the first device to convert a received downlink signal into a sent uplink signal.

[0023] According to a third aspect, a communication method is provided, which includes: determining a first time slot format, wherein the first time slot format includes at least one first symbol, the first symbol includes a first interval and a second interval, or includes a first interval and a third interval, or includes a first interval, a second interval and a third interval, wherein the first interval is used to realize the conversion from downlink transmission to uplink transmission, as a reserved resource or a protection interval, the second interval is used for uplink transmission, and the third interval is used for downlink transmission; and sending second indication information to indicate the first time slot format.

[0024] In the above implementation, the transmitting and receiving ends can determine the format of at least one time slot containing the first symbol by exchanging second indication information, thereby utilizing some of the symbols for specific information transmission, reducing the delay overhead of the guard interval, and improving communication resource utilization. Furthermore, the transmitting and receiving ends can flexibly configure and indicate transmission resources, thereby improving transmission efficiency.

[0025] In one implementation, the second indication information is used to indicate position information of the at least one first symbol.

[0026] In one embodiment, the first symbol is the last symbol of a downlink channel, or the first symbol is the first symbol of an uplink channel.

[0027] In one implementation, the second indication information is used to indicate a sequence number of the at least one first symbol in the first time slot format.

[0028] In one embodiment, before receiving the second indication information, the method also includes: receiving third indication information, the third indication information is used to indicate a second time slot format, the second time slot format includes at least one of an uplink symbol, a downlink symbol or a flexible symbol; the second indication information includes the sequence number of at least one symbol in the second time slot format, the sequence number is used to indicate the sequence number of the first symbol in the first time slot format.

[0029] In one embodiment, the second indication information is used to indicate information of the first symbol included in an uplink transmission symbol, a downlink transmission symbol, a flexible symbol, a frame structure, or a mini-time slot.

[0030] In one embodiment, the second indication information is carried in at least one of the following: system message block SIB1, radio resource control RRC signal, downlink control information DCI, sidelink control information SCI, time slot format indication SFI, other physical layer signaling or other high-layer signaling.

[0031] In one embodiment, the method further includes: receiving capability information of the first device, where the capability information is used to indicate whether the first device supports the first symbol and / or the type of the supported first symbol.

[0032] In one embodiment, the capability information includes at least one of the following: information on whether the first device supports the first symbol, information on the first symbol type supported by the first device, information on the conversion period supported by the first device, or information on the capability of the first device to convert a received downlink signal into a sent uplink signal.

[0033] In a fourth aspect, a communication method is provided, the method comprising: receiving second indication information, the second indication information being used to determine a first time slot format, wherein the first time slot format includes at least one first symbol, the first symbol including a first interval and a second interval, or including a first interval and a third interval, or including a first interval, a second interval and a third interval, the first interval being used to realize the conversion from downlink transmission to uplink transmission, as a reserved resource or a protection interval, the second interval being used for uplink transmission, and the third interval being used for downlink transmission; determining the first time slot format according to the second indication information.

[0034] In one implementation, the second indication information is used to indicate position information of the at least one first symbol.

[0035] In one embodiment, the first symbol is the last symbol of a downlink channel, or the first symbol is the first symbol of an uplink channel.

[0036] In one implementation, the second indication information is used to indicate a sequence number of the at least one first symbol in the first time slot format.

[0037] In one embodiment, before receiving the second indication information, the method also includes: receiving third indication information, the third indication information is used to indicate a second time slot format, the second time slot format includes at least one of an uplink symbol, a downlink symbol or a flexible symbol; the second indication information includes the sequence number of at least one symbol in the second time slot format, the sequence number is used to indicate the sequence number of the first symbol in the first time slot format.

[0038] In one embodiment, the second indication information is used to indicate information of the first symbol included in an uplink transmission symbol, a downlink transmission symbol, a flexible symbol, a frame structure, or a mini-time slot.

[0039] In one embodiment, the second indication information is carried in at least one of the following: system message block SIB1, radio resource control RRC signal, downlink control information DCI, sidelink control information SCI, time slot format indication SFI, other physical layer signaling or other high-layer signaling.

[0040] In one embodiment, the method further includes: sending capability information of the first device, where the capability information is used to indicate whether the first device supports the first symbol and / or the type of the supported first symbol.

[0041] In one embodiment, the capability information includes at least one of the following: information on whether the first device supports the first symbol, information on the first symbol type supported by the first device, information on the conversion period supported by the first device, or information on the capability of the first device to convert a received downlink signal into a sent uplink signal.

[0042] In a fifth aspect, a communication device is provided, which includes: a processing module for determining a first symbol, wherein the first symbol includes a first interval and a second interval, or includes a first interval and a third interval, or includes a first interval, a second interval and a third interval, wherein the first interval is used to realize the conversion from downlink transmission to uplink transmission, as a reserved resource or a protection interval, the second interval is used for uplink transmission, and the third interval is used for downlink transmission; a communication module for sending first indication information, wherein the first indication information is used to indicate the first symbol.

[0043] In one embodiment, the first indication information is used to indicate at least one of the following: the starting position of the first interval in the first symbol, the duration corresponding to the first interval, the ratio of the duration of the first interval to the duration of the first symbol, the duration occupied by the second interval in the first symbol, the ratio of the duration of the second interval to the duration of the first symbol, the duration occupied by the third interval in the first symbol, or the ratio of the duration of the third interval to the duration of the first symbol.

[0044] In one embodiment, the first symbol is preconfigured as follows: the starting position of the first interval is the starting position of the first symbol, or the ending position of the first interval is the ending position of the first symbol, or the starting position or the ending position of the first interval is the middle position of the first symbol, or the starting position and / or the ending position of the first interval is other positions in the first symbol except the starting position and the ending position.

[0045] In one embodiment, the first indication information includes a first index value, which corresponds to a first position and a first duration; wherein the first position is used to indicate the starting position of the first interval in the first symbol, and the first duration is used to indicate the duration of the first interval in the first symbol; or, the first indication information includes a second index value, which corresponds to a second duration and a third duration; wherein the second duration is used to indicate the duration of the third interval in the first symbol, and the third duration is used to indicate the duration of the second interval in the first symbol.

[0046] In one embodiment, the first indication information is carried in at least one of the following: system information block SIB1, radio resource control RRC signal, downlink control information DCI or sidelink control information SCI, or other physical layer signaling or other high layer signaling.

[0047] In one embodiment, the communication module is further configured to receive capability information of the device, where the capability information is used to indicate whether the device supports the first symbol and / or the type of the supported first symbol.

[0048] In one embodiment, the capability information includes at least one of the following: information on whether the device supports the first symbol, information on the first symbol type supported by the device, information on the conversion cycle supported by the device, or information on the device's ability to convert a received downlink signal into a sent uplink signal.

[0049] In a sixth aspect, a communication device is provided, which includes: a communication module for receiving first indication information, wherein the first indication information is used to indicate a first symbol, the first symbol includes a first interval and a second interval, or includes a first interval and a third interval, or includes a first interval, a second interval and a third interval, wherein the first interval is used to realize the conversion from downlink transmission to uplink transmission, as a reserved resource or a protection interval, the second interval is used for uplink transmission, and the third interval is used for downlink transmission; a processing module for determining the first symbol based on the first indication information.

[0050] In one embodiment, the first indication information is used to indicate at least one of the following: the starting position of the first interval in the first symbol, the duration corresponding to the first interval, the ratio of the duration of the first interval to the duration of the first symbol, the duration occupied by the second interval in the first symbol, the ratio of the duration of the second interval to the duration of the first symbol, the duration occupied by the third interval in the first symbol, or the ratio of the duration of the third interval to the duration of the first symbol.

[0051] In one embodiment, the first symbol is preconfigured as follows: the starting position of the first interval is the starting position of the first symbol, or the ending position of the first interval is the ending position of the first symbol, or the starting position or the ending position of the first interval is the middle position of the first symbol, or the starting position and / or the ending position of the first interval is other positions in the first symbol except the starting position and the ending position.

[0052] In one embodiment, the first indication information includes a first index value, which corresponds to a first position and a first duration; wherein the first position is used to indicate the starting position of the first interval in the first symbol, and the first duration is used to indicate the duration of the first interval in the first symbol; or, the first indication information includes a second index value, which corresponds to a second duration and a third duration; wherein the second duration is used to indicate the duration of the third interval in the first symbol, and the third duration is used to indicate the duration of the second interval in the first symbol.

[0053] In one embodiment, the first indication information is carried in at least one of the following: system information block SIB1, radio resource control RRC signal, downlink control information DCI or sidelink control information SCI, or other physical layer signaling or other high layer signaling.

[0054] In one embodiment, the communication module is further configured to send capability information of the device, where the capability information is used to indicate whether the device supports the first symbol and / or the type of the supported first symbol.

[0055] In one embodiment, the capability information includes at least one of the following: information on whether the device supports the first symbol, information on the first symbol type supported by the device, information on the conversion cycle supported by the device, or information on the device's ability to convert a received downlink signal into a sent uplink signal.

[0056] In the seventh aspect, a communication device is provided, which includes: a processing module for determining a first time slot format, wherein the first time slot format includes at least one first symbol, the first symbol includes a first interval and a second interval, or includes a first interval and a third interval, or includes a first interval, a second interval and a third interval, wherein the first interval is used to realize the conversion from downlink transmission to uplink transmission, as a reserved resource or a protection interval, the second interval is used for uplink transmission, and the third interval is used for downlink transmission; a communication module for sending second indication information for indicating the first time slot format.

[0057] In one implementation, the second indication information is used to indicate position information of the at least one first symbol.

[0058] In one embodiment, the first symbol is the last symbol of a downlink channel, or the first symbol is the first symbol of an uplink channel.

[0059] In one implementation, the second indication information is used to indicate a sequence number of the at least one first symbol in the first time slot format.

[0060] In one embodiment, the communication module is also used to: receive third indication information, wherein the third indication information is used to indicate a second time slot format, wherein the second time slot format includes at least one of an uplink symbol, a downlink symbol or a flexible symbol; the second indication information includes the sequence number of at least one symbol in the second time slot format, and the sequence number is used to indicate the sequence number of the first symbol in the first time slot format.

[0061] In one embodiment, the second indication information is used to indicate information of the first symbol included in an uplink transmission symbol, a downlink transmission symbol, a flexible symbol, a frame structure, or a mini-time slot.

[0062] In one embodiment, the second indication information is carried in at least one of the following: system information block SIB1, radio resource control RRC signal, downlink control information DCI, sidelink control information SCI time slot format indication SFI, other physical layer signaling or other high-layer signaling.

[0063] In one embodiment, the communication module is further configured to receive or send capability information of the device, where the capability information is used to indicate whether the device supports the first symbol and / or the type of the supported first symbol.

[0064] In one embodiment, the capability information includes at least one of the following: information on whether the device supports the first symbol, information on the first symbol type supported by the device, information on the conversion cycle supported by the device, or information on the device's ability to convert a received downlink signal into a sent uplink signal.

[0065] In an eighth aspect, a communication device is provided, comprising: a communication module for receiving second indication information, wherein the second indication information is used to indicate a first time slot format, wherein the first time slot format includes at least one first symbol, the first symbol includes a first interval and a second interval, or includes a first interval and a third interval, or includes a first interval, a second interval and a third interval, the first interval is used to realize the conversion from downlink transmission to uplink transmission, as a reserved resource or a protection interval, the second interval is used for uplink transmission, and the third interval is used for downlink transmission; and a processing module for determining the first time slot format based on the second indication information.

[0066] In one implementation, the second indication information is used to indicate position information of the at least one first symbol.

[0067] In one embodiment, the first symbol is the last symbol of a downlink channel, or the first symbol is the first symbol of an uplink channel.

[0068] In one implementation, the second indication information is used to indicate a sequence number of the at least one first symbol in the first time slot format.

[0069] In one embodiment, the communication module is also used to: send a third indication information, wherein the third indication information is used to indicate a second time slot format, wherein the second time slot format includes at least one of an uplink symbol, a downlink symbol or a flexible symbol; the second indication information includes the sequence number of at least one symbol in the second time slot format, and the sequence number is used to indicate the sequence number of the first symbol in the first time slot format.

[0070] In one embodiment, the second indication information is used to indicate information of the first symbol included in an uplink transmission symbol, a downlink transmission symbol, a flexible symbol, a frame structure, or a mini-time slot.

[0071] In one embodiment, the second indication information is carried in at least one of the following: system information block SIB1, radio resource control RRC signal, downlink control information DCI, sidelink control information SCI, time slot format indication SFI, other physical layer signaling or other high-layer signaling.

[0072] In one embodiment, the communication module is further configured to receive or send capability information of the device, where the capability information is used to indicate whether the device supports the first symbol and / or the type of the supported first symbol.

[0073] In one embodiment, the capability information includes at least one of the following: information on whether the device supports the first symbol, information on the first symbol type supported by the device, information on the conversion cycle supported by the device, or information on the device's ability to convert a received downlink signal into a sent uplink signal.

[0074] In the ninth aspect, a communication device is provided, comprising: one or more processors and one or more memories; the one or more memories are coupled to the one or more processors, the one or more memories are used to store computer program code, and the computer program code includes computer instructions, and when the one or more processors execute the computer instructions, the communication device executes the method as described in any one of the first to fourth aspects above.

[0075] In a tenth aspect, a computer-readable storage medium is provided, wherein the computer-readable storage medium stores computer-executable instructions, and when the computer-executable instructions are called by the computer, the computer is used to enable the computer to execute any one of the methods described in the first to fourth aspects above.

[0076] In an eleventh aspect, a computer program product is provided. When the computer program product is run on a computer, the computer performs the method as described in any one of the first to fourth aspects above.

[0077] In the twelfth aspect, a communication system is provided, which may include the communication device described in any one of the fifth and sixth aspects above, or the communication system may include the communication device described in any one of the seventh and eighth aspects above.

[0078] In a thirteenth aspect, a chip is provided, which is coupled to a memory and is used to read and execute program instructions stored in the memory to implement the method as described in any one of the first to fourth aspects above.

[0079] It can be understood that any communication device, computer-readable storage medium, computer program product, communication system or chip provided in the above-mentioned fifth to twelfth aspects can be implemented by the corresponding method provided above. Therefore, the beneficial effects that can be achieved can refer to the beneficial effects in the corresponding method provided above, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0080] Figures 1 to 5 are architecture diagrams 1 to 5 of a communication system provided in an embodiment of the present application;

[0081] FIG6 is a schematic structural diagram of a communication device provided in an embodiment of the present application;

[0082] FIG7 is a schematic diagram of a guard interval provided in an embodiment of the present application;

[0083] FIG8 is a schematic diagram of a time slot format provided in an embodiment of the present application;

[0084] FIG9 is a schematic diagram of a time slot format provided in an embodiment of the present application;

[0085] FIG10 is a schematic diagram of a compressed sensing process provided by an embodiment of the present application;

[0086] FIG11 is a schematic diagram of a communication method provided in an embodiment of the present application;

[0087] FIG12 is a schematic diagram of different types of first symbols provided in an embodiment of the present application;

[0088] FIG13 is a schematic diagram of the composition of a first symbol provided in an embodiment of the present application;

[0089] FIG14 is a flow chart of a communication method provided in an embodiment of the present application;

[0090] FIG15 is a schematic diagram of a first time slot format provided in an embodiment of the present application;

[0091] FIG16 is a schematic diagram of another first time slot format provided in an embodiment of the present application;

[0092] FIG17 is a schematic diagram of another first time slot format provided in an embodiment of the present application;

[0093] FIG18 is a schematic diagram of another first time slot format provided in an embodiment of the present application;

[0094] FIG19 is a schematic diagram of a mini-slot format provided in an embodiment of the present application;

[0095] FIG20 is a schematic structural diagram of a communication device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0096] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments.

[0097] In the following, the terms "first," "second," etc. are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the quantity of the technical features indicated. Therefore, a feature specified as "first," "second," etc. may explicitly or implicitly include one or more of the features.

[0098] In addition, in this application, directional terms such as "up", "down", "left", "right", "horizontal" and "vertical" are defined relative to the orientation of the components in the drawings. It should be understood that these directional terms are relative concepts. They are used for relative description and clarification, and they can change accordingly according to changes in the orientation of the components in the drawings.

[0099] In this application, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium.

[0100] First, the implementation scenario of the embodiment of the present application is described with reference to the accompanying drawings.

[0101] The methods provided in the embodiments of the present application can be applied to various communication systems, including but not limited to: non-terrestrial network (NTN) communication systems, narrowband Internet of Things (NB-IoT) systems, global system for mobile communications (GSM), enhanced data rate for GSM evolution (EDGE), wideband code division multiple access (WCDMA), code division multiple access 2000 (CDMA2000), time division-synchronization code division multiple access (TD-SCDMA), long term evolution (LTE), 5G mobile communication systems, and three major application scenarios of next-generation mobile communication systems such as 6G, namely enhanced mobile broadband (eMBB), ultra-reliable low-latency communications (URLLC), and enhanced machine-type communications (EMTC). Communication, eMTC) etc.

[0102] The following describes the communication scenarios of the embodiments of the present application by taking the communication systems shown in Figures 1 to 5 as an example.

[0103] As shown in Figure 1, a schematic diagram of the architecture of a communication system provided in an embodiment of the present application is provided. In Figure 1, the communication system may include at least one network device and / or at least one terminal device. For example, the communication system may include network device 101 and network device 102, or the communication system may include network device 101 and terminal device 103, or the communication system may include terminal device 104 and terminal device 105.

[0104] In Figure 1 , the network device can provide wireless access services for terminal devices. Specifically, each network device corresponds to a service coverage area. Terminal devices that enter this area can communicate with the network device via the Uu port to receive the wireless access services provided by the network device. Terminal devices and network devices can communicate via the Uu port link. The Uu port link can be divided into uplink (UL) and downlink (DL) based on the direction of the uplink data transmitted. The UL can transmit data sent from the terminal device to the network device, and the DL can transmit data transmitted from the network device to the terminal device. For example, in Figure 1 , terminal device 103 is located in the coverage area of ​​network device 101. Network device 101 can send data to terminal device 103 via DL, and terminal device 103 can send data to network device 101 via UL.

[0105] Terminal devices can communicate with other terminal devices via direct communication links. A direct communication link can be referred to as a side link or sidelink (SL). For example, if the direct communication link is a sidelink, terminal devices 103 and 104 in FIG1 can communicate via the sidelink, and terminal devices 104 and 105 in FIG1 can communicate via the sidelink.

[0106] The network devices in Figure 1, such as network device 101 or network device 102, can be transmission reception points (TRPs), base stations, relay stations, or access points. Network devices 101 or 102 can be network devices in a 5G communication system or a network device in a future evolution network. They can also be base transceiver stations (BTSs) in a global system for mobile communication (GSM) or a code division multiple access (CDMA) network, NBs (NodeBs) in wideband code division multiple access (WCDMA), or eNBs or eNodeBs (evolutionary NodeBs) in long term evolution (LTE). Network devices 101 or 102 can also be wireless controllers in a cloud radio access network (CRAN) scenario.

[0107] The terminal devices in FIG1 , such as terminal device 103 , terminal device 104 , or terminal device 105 , may be devices that include wireless transceiver functionality and can provide communication services to users. Specifically, terminal device 103 , terminal device 104 , or terminal device 105 may be devices in a V2X system, a D2D system, a machine type communication (MTC) system, or the like. For example, terminal device 103 , terminal device 104 , terminal device 105 , or terminal device 106 may refer to an industrial robot, industrial automation equipment, user equipment (UE), an access terminal, 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 terminal device, a user agent, or a user device. For example, terminal device 103, terminal device 104, terminal device 105 or terminal device 106 can be a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, 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 network after 5G or a terminal device in a future evolution network, and this application does not limit this. The terminal device of this application can also be a vehicle-mounted module, a vehicle-mounted module, a vehicle-mounted component, a vehicle-mounted chip or a vehicle-mounted unit that is built into a vehicle as one or more components or units, and the vehicle can implement the method of this application through the built-in vehicle-mounted module, vehicle-mounted module, vehicle-mounted component, vehicle-mounted chip or vehicle-mounted unit.

[0108] In one embodiment, the network device may be an aerial network device in an NTN communication system, or may refer to a non-ground base station or non-ground device, such as a drone, a hot air balloon, a low-orbit satellite, a medium-orbit satellite, a high-orbit satellite, etc. The method provided in the embodiment of the present application can be applied to the communication system shown in Figure 2, which may include an aerial network device, such as a satellite; the communication system may also include at least one terminal device, such as the terminal device shown in Figure 2.

[0109] Satellites can operate in either transparent transmission mode or regeneration mode. In transparent transmission mode, they act as relays, forwarding signals from network devices or terminals, enhancing terrestrial network coverage. Satellites can filter, convert, and amplify wireless frequencies. As shown in Figure 2, transparent transmission between terminals and base stations is possible via the transparent transmission satellite.

[0110] When operating in regenerative mode, the satellite possesses signal processing capabilities; this means it has the processing capabilities of a base station, capable of sending signals to other network devices or terminal devices, thereby providing communication services to these devices. As shown in Figure 2, a terminal establishes wireless communication with the regenerative satellite via the Uu port, enabling communication with the core network.

[0111] In addition, the method provided in the embodiment of the present application can be applied to an inter-satellite link (ISL) communication system between satellites as shown in Figure 3. The communication system may include satellite 1 and satellite 2, and satellite 1 and satellite 2 communicate via the ISL. The satellite includes two parts: an acquisition, pointing and tracking (APT) subsystem and a communication subsystem, as shown in Figure 3.

[0112] The communications subsystem is responsible for transmitting intersatellite information and is the core of the intersatellite communication system. The APT subsystem is responsible for acquisition, alignment, and tracking between satellites. Acquisition is used to determine the incoming signal's direction, alignment is used to adjust the transmitted wave's aiming direction, and tracking is used to continuously adjust alignment and acquisition throughout the communication process. To minimize the effects of attenuation and interference in the channel and maintain high confidentiality and transmission rates, the APT can be adjusted in real time to continuously adapt to changes. Existing APT and communication subsystems are independent systems. The APT subsystem can be an optical system, which is difficult to align and requires mechanical pointing adjustment. The communication subsystem can be an optical communication system, and some microwave band systems also use a single high-gain antenna.

[0113] The method provided in the embodiment of the present application can be applied to the integrated access and backhaul (IAB) network as shown in Figure 4. The IAB network refers to a transmission network for information integrated access and backhaul between the terminal, the core network and the user service end (such as the server). For the backhaul link (backhaul link) and the access link (access link), the IAB network can realize access and backhaul integration. As shown in Figure 4, the IAB network may include an IAB parent node (IAB Doner), an IAB node (IAB node) and a user device. Among them, the link between the IAB Doner and the IAB node is a backhaul link, and the link between the user device and the IAB node is an access link.

[0114] For example, the method provided in the embodiment of the present application can be applied to side-by-side communication scenarios between terminals. Common application scenarios include wireless screen projection, virtual reality (VR) games, or data encoding and decoding of applications in mobile phones. The schematic diagram of mobile phone wireless screen projection shown in Figure 5 includes a smart TV and a smart phone, which realize screen projection and playback through wireless signals.

[0115] It should be noted that the communication systems shown in Figures 1-5 are for illustrative purposes only and are not intended to limit the technical solutions of this application. Those skilled in the art will appreciate that, in a specific implementation, the communication system may also include other devices, and the number of network devices and terminal devices may be determined based on specific needs. Furthermore, the network elements shown in the figures may also be connected via other interfaces, without limitation.

[0116] Optionally, each network element in the diagram of the embodiment of the present application, such as a network device or a terminal device, may be a functional module within a device. It is understood that the functional module may be a component in a hardware device, such as a communication chip or communication component in a terminal device or a network device, or a software functional module running on the hardware, or a virtualized function instantiated on a platform (e.g., a cloud platform).

[0117] For example, each network element in Figures 1 to 5 can be implemented by the communication device 600 in Figure 6. Figure 6 shows a schematic diagram of the hardware structure of a communication device applicable to embodiments of the present application. The communication device 600 may include at least one processor 601, a communication line 602, a memory 603, and at least one communication interface 604.

[0118] The processor 601 can be a general-purpose central processing unit (CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more integrated circuits used to control the execution of the program of the present application.

[0119] The communication link 602 may include a path for transmitting information between the above components, such as a bus.

[0120] The communication interface 604 uses any transceiver-like device for communicating with other devices or communication networks, such as an Ethernet interface, a radio access network (RAN) interface, a wireless local area network (WLAN) interface, etc.

[0121] The memory 603 can be a read-only memory (ROM) or other types of static storage devices that can store static information and instructions, a random access memory (RAM) or other types of dynamic storage devices that can store information and instructions, or an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disc storage, optical disc storage (including compressed optical disc, laser disc, optical disc, digital versatile disc, Blu-ray disc, etc.), a magnetic disk storage medium or other magnetic storage device, or any other medium that can be used to carry or store desired program codes in the form of instructions or data structures and can be accessed by a computer, but is not limited thereto. The memory can be independent and connected to the processor via a communication line 602. The memory can also be integrated with the processor. The memory provided in the embodiment of the present application can generally have non-volatility. Among them, the memory 603 is used to store the computer execution instructions involved in executing the solution of the present application, and is controlled by the processor 601 to execute. The processor 601 is used to execute the computer-executable instructions stored in the memory 603, thereby implementing the method provided in the embodiment of the present application.

[0122] Optionally, the computer-executable instructions in the embodiments of the present application may also be referred to as application code, which is not specifically limited in the embodiments of the present application.

[0123] In a specific implementation, as an embodiment, the processor 601 may include one or more CPUs, such as CPU0 and CPU1 in FIG. 2 .

[0124] In a specific implementation, as an embodiment, the communication device 600 may include multiple processors, such as the processor 601 and the processor 607 in FIG6 . Each of these processors may be a single-core (single-CPU) processor or a multi-core (multi-CPU) processor. The processor herein may refer to one or more devices, circuits, and / or processing cores for processing data (e.g., computer program instructions).

[0125] In a specific implementation, as an embodiment, the communication device 600 may further include an output device 605 and an input device 606. The output device 605 communicates with the processor 601 and can display information in a variety of ways. For example, the output device 605 can be a liquid crystal display (LCD), a light emitting diode (LED) display device, a cathode ray tube (CRT) display device, or a projector. The input device 606 communicates with the processor 601 and can receive user input in a variety of ways. For example, the input device 606 can be a mouse, a keyboard, a touch screen device, or a sensor device.

[0126] In a specific implementation, the communication device 600 can be a desktop computer, a portable computer, a network server, a personal digital assistant (PDA), a mobile phone, a tablet computer, a wireless terminal device, an embedded device, or a device with a similar structure as shown in Figure 6. The embodiment of the present application does not limit the type of the communication device 600.

[0127] In the wireless resource, the smallest resource granularity in the time domain can be an orthogonal frequency division multiplexing (OFDM) symbol, which can be abbreviated as OS. Currently, OFDM symbols can be of the following three types:

[0128] Uplink symbol: Indicated by the letter U, it is used for uplink transmission, and the signal it carries can be called an uplink signal.

[0129] Downlink symbol: Indicated by the letter D, it is used for downlink transmission, and the signal it carries can be called a downlink signal.

[0130] Flexible symbols, represented by the letter F, can be used as reserved resources for uplink transmission or downlink transmission. Flexible symbols can also serve as guard periods (GPs) to facilitate transitions between uplink and downlink transmission.

[0131] The length of an OFDM symbol includes the length of the cyclic prefix (CP) and the useful symbol length. To meet different latency requirements, CPs can be divided into regular CPs and extended CPs. For example, when the SCS is 60 kHz, a regular CP contains 14 symbols per time slot, while an extended CP contains 12 symbols per time slot, which is suitable for communication scenarios with higher transmission latency.

[0132] In existing protocols, different subcarrier spacings (SCS) are set with corresponding CP lengths and symbol durations, also known as useful symbol lengths; and the number of symbols in each time slot is set accordingly, as shown in Table 1.

[0133] Table 1

[0134] For example, as shown in Figure 7, the base station sends a DL signal to the UE, and the UE sends an uplink signal to the base station. For the UE, a GP between the DL signal and the UL signal may include two parts: the switching delay from downlink transmission to uplink transmission and 2 times the length of the round trip time (RTT).

[0135] Each time slot can be freely combined with the three types of symbols mentioned above to form a variety of time slot formats. Based on the above symbol types, the time slot formats currently agreed upon by the protocol can include the following types:

[0136] Type 1: Contains only D symbols. This time slot is used only for transmitting downlink signals and is called a downlink time slot, also known as a DL-only slot. For example, type 1 is shown in Figure 8.

[0137] Type 2: Contains only U symbols. This time slot is used only for uplink signal transmission and is called an uplink time slot, also known as a UL-only slot. For example, type 2 is shown in Figure 8.

[0138] Type 3: Contains only F symbols. This time slot can be used to transmit uplink and / or downlink signals and is also called a flexible-only slot. For example, type 3 is shown in Figure 8.

[0139] Type 4: A timeslot contains at least one D symbol or one U symbol, and the timeslot also contains an F symbol, such as types 4-1 to 4-5 in Figure 8.

[0140] In the field of communications, two time units Tc and Ts are defined. Time unit T c =1 / (Δf max ·N f), where Δf max =480·10 3 Hz, N f =4096. κ = T s / T c =64, time unit T s =1 / (Δf ref ·N f,ref ),Δf ref =15·10 3 Hz, N f,ref =2048. As shown in Figure 9, taking SCS of 15KHz, 30KHz, and 45KHz as examples, a schematic diagram of the frame structure and time slot format in units of Ts is shown. For example, as shown in Figure 9, the SCS is 15KHz, corresponding to two time slot formats, the useful symbol length is 2048Ts, the regular CP is 144Ts, and the corresponding time slot is (144+2048)Ts; the extended CP is 160Ts, and the corresponding time slot is (160+2048)Ts. The SCS is 30KHz, corresponding to the useful symbol length is 1024Ts, the regular CP is 72Ts, and the corresponding time slot is (72+1024)Ts; the extended CP is 88Ts, and the corresponding time slot is (88+1024)Ts. The SCS is 60KHz, and the corresponding useful symbol length is 512Ts. The regular CP is 36Ts, and the corresponding time slot is (36+512)Ts; the extended CP is 52Ts, and the corresponding time slot is (52+512)Ts.

[0141] As described in Figure 7 above, in the existing time slot format, a time slot can include up to two GP symbols, so the overhead of these two GP symbols is 1 / 7 of the time slot. For communication scenarios with low latency requirements, such as factory scenarios, the distance between the transmitting and receiving devices is relatively close, so the RTT is relatively small. However, the overhead of the protection interval in the existing frame structure is too large, resulting in a larger delay.

[0142] To solve the above problems, the present application provides a communication method, which defines a new symbol, namely a partial OFDM symbol, and based on "compressed sensing algorithm" or "frequency domain zero insertion" and other processing, the transmitter sends partial OFDM symbols in the time domain, and the receiver recovers the complete frequency domain signal based on the partial OFDM symbols; the remaining time domain part can be used as a reserved resource or protection interval to realize the delay of uplink and downlink conversion, thereby reducing GP overhead and reducing latency.

[0143] The classic Nyquist sampling theorem states that to recover the original signal from the sampled signal without distortion, the Nyquist sampling frequency must be greater than twice the highest frequency in the original signal. This sampling theorem assumes that sampling is performed at equal intervals.

[0144] Compressed sensing algorithms, also known as compressed sampling or sparse sampling, exploit the sparse nature of signals to obtain discrete samples of the signal using random sampling at a rate far less than the Nyquist sampling rate. The original signal can then be restored using a nonlinear reconstruction algorithm. In other words, compressed sensing algorithms can achieve the effect of full sampling using only a few sampling points. The conditions for compressed sensing algorithms include: 1) the signal is sparse in a certain domain of variation, for example, the signal has only a few non-zero values ​​in the frequency domain, i.e., it is sparse; and 2) random subsampling is used.

[0145] Compressed sensing algorithm, as shown in Figure 10, the original signal is sparse in the frequency domain. The transmitter sends part of the time domain OFDM symbols; the receiver receives this part of the time domain OFDM symbols and can restore the original frequency domain signal by decompressing the compressed sensing algorithm.

[0146] In addition, frequency domain interpolation is a periodic property of discrete Fourier transform. Based on this periodic property, part of the time domain information can be sent / received to achieve early recovery of the frequency domain signal.

[0147] Exemplarily, the first frequency domain signal [a1, a2, a3, a4] is interpolated with 0 in the frequency domain, such as inserting a 0 between every two signals, and the second frequency domain signal obtained may be [a1, 0, a2, 0, a3, 0, a4, 0]. The second frequency domain signal is subjected to an inverse discrete Fourier transform (IDFT) or an inverse fast Fourier transform (IFFT) to obtain a second time domain signal of the second frequency domain signal. It can be seen that the second time domain signal of the second frequency domain signal is a double repetition of the first time domain signal of the first frequency domain signal. Therefore, the original frequency domain signal can be restored based on the received portion of the second time domain signal, such as 1 / 2 of the second time domain signal.

[0148] The following will describe in detail the methods provided in the embodiments of the present application with reference to the accompanying drawings. The following embodiments of the present application can be applied to any of the aforementioned communication systems and are not limited to the communication systems in the above examples. In the following embodiments, only the transmitting end and the receiving end are used as examples. For example, the receiving end can be a first device, specifically a terminal, a base station, or a satellite, or a module or chip included in the above devices; the transmitting end can be a second device, specifically a terminal, a base station, or a satellite, or a module or chip included in the above devices.

[0149] It should be noted that the message names between network elements or the names of parameters in the messages in the following embodiments of the present application are only examples, and other names may be used in specific implementations. The embodiments of the present application do not specifically limit this.

[0150] It is understood that in the embodiments of the present application, the first device or the second device can perform some or all of the steps in the embodiments of the present application. These steps are merely examples, and the embodiments of the present application can also perform other steps or variations of various steps. In addition, the various steps can be performed in a different order than those presented in the embodiments of the present application, and it is possible that not all of the steps in the embodiments of the present application need to be performed.

[0151] As shown in FIG11 , the present application provides a communication method, which may include the following steps.

[0152] 1101: The second device determines a first symbol.

[0153] The first symbol is a partial OFDM symbol newly defined in this application, which can be called partial OS. This application does not specifically limit the name of this symbol.

[0154] The first symbol includes a first interval. In addition, the first symbol also includes a second interval or a third interval, or the first symbol also includes a second interval and a third interval. The first interval is used to achieve the conversion from downlink transmission to uplink transmission, as a reserved resource or a protection interval. The second interval is used for uplink transmission, and the third interval is used for downlink transmission. In other words, part of the resources in the first symbol are used to achieve the conversion from downlink transmission to uplink transmission, and the remaining resources can be used to transmit useful symbols, such as carrying part of the uplink signal and / or downlink signal, to achieve uplink and downlink transmission, thereby no longer requiring at least one GP symbol as a protection interval, which can effectively reduce the delay overhead of the protection interval.

[0155] The first interval may include the following three meanings: 1) The first interval can be used to achieve the conversion from downlink transmission to uplink transmission, such as the time taken by the receiving end shown in Figure 7 to convert from downlink transmission to uplink transmission. For example, for some low-latency implementation scenarios, such as factory scenarios, the RTT is small and can be ignored. 2) The first interval can be used as a protection interval, which is not limited to being used to achieve the delay from downlink transmission to uplink transmission, and can also include 2 times the RTT duration, etc. 3) The first interval can be used as a reserved resource for uplink and downlink transmission and to achieve the functions of 1) or 2) above.

[0156] In one embodiment, the starting position of the first interval may be the starting position of the first symbol, or the ending position of the first interval may be the ending position of the first symbol, or the starting position or the ending position of the first interval may be a middle position of the first symbol, or the starting position and / or the ending position of the first interval may be other positions of the first symbol except the starting position and the ending position. In other words, the first interval may start from any position of the first symbol and end at any position of the first symbol.

[0157] Figure 12 shows several types of first intervals, where, as shown in (a) in Figure 12, for the first interval preamble, the starting position of the first interval can be the starting position of the first symbol, and the ending position of the first interval can be any position in the first symbol except the starting position and the ending position, and the duration of the first interval is greater than 0 (s) and less than the length of the first symbol. For example, the length of the first interval can be half the length of an OFDM symbol, then the first half of the first symbol can be the first interval, and the second half of the symbol can be used to carry useful signals, for example, the second half of the first symbol can be the second interval, used for uplink transmission. It can be seen that the first symbol sends a partial uplink signal. Optionally, the partial uplink signal includes a partial useful signal, or the partial uplink signal includes a partial CP signal and all useful signals.

[0158] In addition, as shown in (b) of Figure 12, for the first interval being post-positioned, the end position of the first interval can be the end position of the first symbol, the start position of the first interval can be any position in the first symbol except the start position and the end position, and the duration of the first interval is greater than 0 (s) and less than the length of the first symbol. For example, the length of the first interval can be half the length of an OFDM symbol, then the second half of the first symbol can be the first interval, then the first half of the symbol can be used to carry a useful signal, for example, the first half of the first symbol can be the third interval for downlink transmission. Optionally, the partial downlink signal includes all CP signals and part of the useful signal, or the partial downlink signal includes part of the useful signal.

[0159] In addition, as shown in (c) of Figure 12, for the first interval being centered, that is, the starting position and the ending position of the first interval can be any position in the first symbol except the starting position and the ending position, and the duration of the first interval is greater than 0 (s) and less than the length of the first symbol. For example, the length of the first interval can be half the length of an OFDM symbol, then the first 1 / 4 symbol of the first symbol can be the third interval for downlink transmission; the middle 1 / 2 symbol is the first interval; and the last 1 / 4 symbol of the first symbol can be the second interval for uplink transmission. It can be seen that the first symbol sends a partial downlink signal, optionally, the partial downlink signal includes all CP signals and part of the useful signal; or, the partial downlink signal includes part of the useful signal; optionally, the partial uplink signal includes part of the useful signal, or, the partial uplink signal includes part of the CP signal and all useful signals.

[0160] In one embodiment, the first symbol may be predefined by protocol as being placed before the first interval, in the middle of the first interval, or after the first interval. Further, the specific format related to placing the first interval before, in the middle of, or after the first interval may be indicated by the first indication information. Or, further optionally, the specific format related to placing the first interval before, in the middle of, or after the first interval may be predefined by protocol. The specific related format includes at least one of the following: the starting position of the first interval in the first symbol, the duration corresponding to the first interval, the number of sampling points corresponding to the first interval, the proportion of the duration of the first interval to the duration of the first symbol, the duration occupied by the second interval in the first symbol, the proportion of the duration of the second interval to the duration of the first symbol, the duration occupied by the third interval in the first symbol, or the proportion of the duration of the third interval to the duration of the first symbol. In the above embodiment, if the protocol predefines a specific format for the first symbol, there is no need to send the first indication information without indication overhead.

[0161] 1102: The second device sends first indication information to the first device, where the first indication information is used to indicate a first symbol.

[0162] Specifically, the second device determines the first symbol, which may specifically be determining the format of the first symbol. For example, whether the first symbol is pre-placed, mid-placed, or post-placed with the first interval described above; or the format of the first symbol specifically includes parameters such as the duration of the first interval included in the first symbol and the starting position of the first interval included in the first symbol. After determining the format of the first symbol, the second device may send first indication information to the first device, indicating the format of the first symbol, such as the type of the first symbol and / or related parameters.

[0163] In one embodiment, the first indication information can be used to indicate at least one of the following: the starting position of the first interval in the first symbol, the duration corresponding to the first interval, the number of sampling points corresponding to the first interval, the ratio of the duration of the first interval to the duration of the first symbol, the duration occupied by the second interval in the first symbol, the ratio of the duration of the second interval to the duration of the first symbol, the duration occupied by the third interval in the first symbol, or the ratio of the duration of the third interval to the duration of the first symbol.

[0164] Exemplarily, the second device and the first device pre-configure or agree upon a type of the first symbol as one of pre-first interval, mid-first interval, and post-first interval. For example, if the first symbol type is configured as pre-first interval, the first indication information sent by the second device to the first device indicates the duration corresponding to the first interval, so that the second device can obtain the specific format of the first symbol based on the pre-configured or agreed upon type of the first symbol and the duration corresponding to the first interval.

[0165] In another example, if the type of the first symbol is defined as: the first interval is placed in front, the first interval is placed in the middle, and the first interval is placed in the back, then the first indication information may include the starting position of the first interval and the duration corresponding to the first interval. For example, the duration corresponding to the first interval can be 1 / 2 of the first symbol, or 1 / 4 of the first symbol, or any other proportion, which can be represented by 1 / 2 or 1 / 4OS respectively. In addition, the starting position of the first interval can be the starting position of the first symbol, the middle position of the first symbol, or the 1 / 4 position of the first symbol, which can be represented by parameters 0, 1 / 2, or 1 / 4OS respectively. As shown in Table 2, the first indication information may include one of the following index values, each index value being associated with a starting position of the first interval and the length of the first interval. The first indication information is used to indicate the parameter corresponding to the index, thereby indicating the format of the first symbol.

[0166] Table 2 Predefined / configured first symbol parameters

[0167] For example, referring to Table 2 predefined / configured in the protocol, if the index included in the first indication information is 00, it indicates that the first interval starts at the start position of the first symbol and the length of the first interval is 1 / 2 of the first symbol. Based on the first indication information, it can be determined that the first symbol is in the format described in 14 above, where the first interval is pre-positioned. Similarly, if the index included in the first indication information is 01, it corresponds to the format described above, where the first interval is post-positioned; and if the index included in the first indication information is 10, it corresponds to the format described above, where the first interval is mid-positioned.

[0168] In the aforementioned example, parameters such as the starting position of the first interval and the length of the first interval included in the first indication information are in units of the length of the first symbol. In another embodiment, parameters such as the starting position of the first interval and the length of the first interval included in the first indication information may be in units of milliseconds (ms), or may be in units of time units such as Ts or Tc.

[0169] Exemplarily, the first indication information may be used to indicate at least one index in Table 3 predefined / configured by the following protocol. Table 3 takes an SCS of 30 kHz and a conventional CP as an example. The first symbol includes: (72+1024)Ts, where the CP length is 72Ts and the length of the useful information is 1024Ts.

[0170] Table 3 Predefined / configured first symbol parameters

[0171] For example, if the index included in the first indication information is 00, it means that the end position of the CP in the first symbol can be the starting position of the first interval, and the length of the first interval is 1 / 2 of the length of the useful information in the first symbol, then the format of the first symbol can be determined according to the first indication information.

[0172] For example, if the index included in the first indication information is 01, it means that the starting position of the first interval is 1 / 2 of the length of the useful information in the first symbol, and the length of the first interval is 1 / 2 of the length of the useful information in the first symbol. The format of the first symbol can be determined according to the first indication information.

[0173] For example, if the index included in the first indication information is 10, it means that the starting position of the first interval is 1 / 4 of the length of the useful information in the first symbol, and the length of the first interval is 1 / 2 of the length of the useful information in the first symbol. The format of the first symbol can be determined based on the first indication information.

[0174] It should be noted that, for the compressed sensing algorithm, the starting position of the first interval in the above embodiment can be any starting position of the first symbol, or it can be the position of 1 / 2 or 1 / 4 OS of the first symbol; the duration of the first interval can be 1 / 2 or 1 / 4 of the first symbol, or it can be any duration in the first symbol, and any duration is less than or equal to the duration of the first symbol. For the frequency domain zero interpolation algorithm, the duration of the second interval and / or the third interval in the first symbol needs to meet the duration greater than or equal to one time domain period. For example, frequency domain zero interpolation is performed between every two signals of the first frequency domain signal [a1, a2, a3, a4], and the second frequency domain signal obtained can be [a1, 0, a2, 0, a3, 0, a4, 0]. Then the second time domain signal corresponding to the second frequency domain signal is periodic, that is, the second time domain signal is two repetitions of the first time domain signal corresponding to the first frequency domain signal. One time domain period represents the duration of the first time domain signal, so the second interval contains at least one time domain period and / or the third interval contains at least one time domain period.

[0175] In the above implementation of configuring three types of first symbols, the structure of the first symbol is relatively simple, and there are fewer formats of the first symbol predefined by the protocol or configured by the high layer, so the overhead of the indication information is relatively small.

[0176] In a possible implementation, a format index table of one or more first symbols can be preconfigured or predefined to include format parameters of multiple first symbols; then, one of the index values ​​is indicated by the first indication information to indicate the format of at least one first symbol.

[0177] For example, each index value may correspond to a first position and a first duration, wherein the first position is used to indicate the starting position of the first interval in the first symbol, and the first duration is used to indicate the duration of the first interval in the first symbol. As shown in FIG13 , the first position is the starting position of the first interval, denoted by S; the first duration is the duration of the first interval, denoted by L.

[0178] Exemplarily, the first indication information may be used to indicate at least one index value as shown in Table 4. Table 4 takes the SCS as 15 kHz and the normal CP as an example. The first symbol includes: (144+2048)Ts, where the CP length is 144Ts and the length of the useful information is 2048Ts.

[0179] Table 4 Predefined / configured first symbol parameters

[0180] It should be noted that the parameters in Table 4 above are only examples, where S can be any position of the first symbol, such as the starting position of the first symbol, 1 / 2 of the first symbol, 1 / 4 of the first symbol, or 3 / 4 of the first symbol, which corresponds to S being 0, S being (144+2048) / 2Ts=1096Ts, S being (144+2048) / 4Ts=548Ts, or S being 3*(144+2048) / 4Ts=1644Ts, etc. Similarly, L can also be any length, and the values ​​of S and L must satisfy the condition that S+L is less than or equal to the length of one first symbol.

[0181] In addition, if the format of the first symbol is configured with multiple index tables, the network device can configure one of the index tables for the first device or the second device through high-level signaling according to business requirements; or the second device can independently configure an index table for the first device and indicate one of the index values ​​to the first device to determine the format of the first symbol. The format configuration of the first symbol is flexible, and the indication method is flexible.

[0182] Alternatively, in another embodiment, each index value in the format index table of the first symbol may correspond to a second duration and a third duration. The second duration is used to indicate the duration of the third interval in the first symbol, and the third duration is used to indicate the duration of the second interval in the first symbol. As shown in FIG13 , the second duration is the duration of the downlink signal, denoted by Rx; the third duration is the duration of the uplink signal, denoted by Tx. For the receiving end, the second duration indicates the time occupied by the received signal, and the third duration indicates the time occupied by the transmitted signal.

[0183] Exemplarily, the first indication information may be used to indicate at least one index value as shown in Table 5. Table 6 takes SCS of 15 kHz and normal CP as an example.

[0184] It should be noted that in the following tables, the values ​​of Rx and Tx need to meet the condition: Rx+Tx is less than the length of a first symbol.

[0185] Table 5 Predefined / configured first symbol parameters

[0186] Exemplarily, the first indication information may be used to indicate at least one index value as shown in Table 6. Table 7 takes the SCS as 60 kHz and the normal CP as an example. The first symbol includes: (36+512)Ts, where the CP length is 36Ts and the length of the useful information is 512Ts.

[0187] Table 6 Predefined / Configured First Symbol Parameters

[0188] In another exemplary embodiment, the first indication information can be used to indicate at least one index value as shown in Table 7. Table 7 takes an SCS of 60 kHz and a conventional CP as an example. The first symbol includes: (36+512)Ts, where the CP length is 36Ts and the length of the useful information is 512Ts. Unlike the aforementioned index table, Table 7 treats the useful information in the first symbol other than the CP as a whole, taking into account the starting position of the first interval and the length of the first interval. For example, the length of the first interval can be configured to be 1 / 2, 1 / 4, or 3 / 4 of the useful information 512Ts, which can be 256Ts, 128Ts, or 384Ts, respectively.

[0189] Table 7 Predefined / Configured First Symbol Parameters

[0190] It should be noted that the parameters in Tables 5 to 7 above are only examples, where Tx or Rx can be not limited to the lengths in the above tables, and can be any value that meets the conditions. For example, the value of Rx+Tx needs to meet the condition: Rx+Tx is less than the length of a first symbol.

[0191] In addition, in a possible implementation scenario, if the conversion time from the received signal to the transmitted signal is very small and can be ignored, that is, the length of the first interval included in the first symbol is considered to be 0, then the above-mentioned Rx+Tx can be equal to the length of a first symbol.

[0192] In contrast, the first device may receive information from the second device. Optionally, the following steps may also be included.

[0193] 1103: The first device receives the first indication information and determines the first symbol according to the first indication information.

[0194] In one embodiment, the first indication information may be carried in higher-layer signaling or in physical layer signaling. For example, the first indication information may be carried in at least one of the following: system information block (SIB) 1, radio resource control (RRC) signal, downlink control information (DCI), sidelink control information (SCI), other physical layer signaling, or higher-layer signaling.

[0195] Specifically, the format of the first symbol can be determined through multi-level indication. Exemplarily, the first device may first receive an RRC signal from a network device or a second device to configure any of the index tables in Tables 2 to 7. The first device then receives a DCI or SCI from the second device to indicate at least one index value in the index table, thereby indicating the format of the first symbol.

[0196] In addition, in one embodiment, the transceiver can also determine the format of the portion of the OS that meets the capability based on their respective capability information. In other words, the first device can include parameters such as the type or format of the first symbol it supports in the capability information and report it to the second device, so that the second device can determine the format of the first symbol based on the received capability information.

[0197] Optionally, the method may further include the following steps:

[0198] 1. The first device sends capability information to the second device.

[0199] 2. The second device receives the capability information of the first device.

[0200] The capability information is used to indicate whether the first device supports the first symbol and / or the type of the supported first symbol. Correspondingly, after successfully receiving the capability information of the first device, the second device can determine the first symbol according to the capability information.

[0201] In one embodiment, the capability information may include at least one of the following: information on whether the first device supports the first symbol, information on the first symbol type supported by the first device, information on the conversion period supported by the first device, or information on the first device's ability to convert downlink transmission to uplink transmission.

[0202] Among them, the information of the downlink transmission conversion capability of the first device can be quantified as a specific value for representation. For example, the first device can quantify the capability of converting downlink transmission into uplink transmission into level 1, level 2, and level 3, etc., wherein the higher the level value, the weaker the capability of converting downlink transmission into uplink transmission of the first device, that is, the longer the delay of converting downlink transmission into uplink transmission of the first device, and the longer the first interval duration of the first symbol predefined or configured by the high-level layer or indicated by the physical layer signaling of the second device; the lower the level value, the stronger the capability of converting downlink transmission into uplink transmission of the first device, that is, the shorter the delay of converting downlink transmission into uplink transmission of the first device, and the longer the first interval duration of the first symbol predefined or configured by the high-level layer or indicated by the physical layer signaling of the second device.

[0203] Alternatively, in one embodiment, the capability information of the first device may be represented by a conversion period. The conversion period may specifically refer to the length of a period during which the first device undergoes a continuous uplink / downlink transmission conversion. For example, one period is equal to the time taken for downlink transmission, the time taken for downlink-to-uplink conversion, and the time taken for uplink transmission. For example, the conversion period of the first device is represented by T, which can be expressed as: T = X / 14 (time slots), where X can be a positive integer and can represent the maximum number of times downlink transmission is converted to uplink transmission within a time slot. Alternatively, the conversion period can be converted into time units, such as milliseconds or microseconds.

[0204] For example, the first device may associate a capability quantization value for converting downlink transmission to uplink transmission with a conversion period, as shown in Table 8. Based on information about supported conversion periods, the first device may determine a capability quantization level for converting downlink transmission to uplink transmission, and thereby transmit the determined capability information to the second device. The stronger the capability quantization value, the more flexible the uplink / downlink conversion of the configurable time slot format of the first device.

[0205] Table 8

[0206] Through the above implementation, the signal transmission and reception ends can negotiate the supported OFDM formats and flexibly configure the symbol format based on the capabilities of the receiving end, so that the transmitting end determines some OFDM formats supported by the receiving end (i.e., the format of the first symbol mentioned above) and further determines the time slot format, making the transmission more flexible and reliable.

[0207] In addition, it can be seen from the above table that by applying the symbol format in the embodiment of the present application, a maximum of 14 uplink and downlink conversions can be achieved in one time slot. Compared with the situation where a maximum of 2 uplink and downlink conversions can be achieved in one time slot, the present application can effectively improve transmission flexibility, shorten the uplink and downlink conversion delay, and improve communication efficiency.

[0208] Based on the format of the first symbol defined above, the present application also provides a communication method for a transmitting end and a receiving end to determine the format of at least one time slot including the first symbol, so as to apply some symbols to specific information transmission and reduce the delay overhead of the protection interval. It can be seen that the above embodiments of the present application can be combined with the following embodiments. According to the specific implementation scenario, the receiving end can receive the configuration information of the first symbol, that is, the first indication information. Before or after this, the receiving end can also receive the second indication information for indicating the format of the first time slot including the first symbol. The embodiments of the present application do not limit the specific implementation methods and the order of implementation.

[0209] It should be noted that the time slot format may refer to the combination and arrangement order of various symbols included in a time slot. In the application scenario of this application, in addition to the time slot format, it may also include the format of the mini-time slot, or the determination of the frame format. The following embodiments are only described by taking the time slot format as an example and do not constitute a limitation to this.

[0210] As shown in FIG. 14 , the method may include the following steps.

[0211] 1401: The second device determines a first time slot format.

[0212] The first time slot format may include at least one first symbol, which may be represented as symbol P in the embodiment of the present application.

[0213] As can be seen from the foregoing embodiments, the symbol types in a timeslot, mini-time slot, or frame include the aforementioned D (which can be identified as Rx for a terminal, indicating a received symbol), U (which can be identified as Tx for a terminal, indicating a transmitted symbol), F, and P. Symbols D and U belong to the OFDM OS, symbol P belongs to the partial OS, and symbol F can be considered either the OFDM OS or the partial OS.

[0214] Among the aforementioned symbols, symbols that can be used for downlink transmission include: D, P, or F; symbols that can be used for uplink transmission include: U, P, or F. A P symbol may include a portion of symbols used for downlink transmission (such as the aforementioned second interval), or may include a portion of symbols used for downlink transmission (such as the aforementioned third interval), or may include both a portion of symbols used for downlink transmission and a portion of symbols used for downlink transmission (such as including the second interval and the third interval).

[0215] For example, taking a time slot including 14 symbols as an example, any of these 14 symbols can be U, D, F or P. The transmitter can determine the type and arrangement order of each symbol in the time slot format based on the transmission requirements between the transmitter and the receiver.

[0216] 1402: The second device sends second indication information to the first device, which is used to indicate the first time slot format.

[0217] Specifically, after determining the first time slot format, the second device may indicate the first time slot format to the first device by sending second indication information.

[0218] 1403: The first device determines the first time slot format according to the second indication information.

[0219] In one embodiment, the second indication information may be used to indicate the position information of each symbol, which may include the position information of at least one first symbol. For example, the first and second devices may configure an index table of time slot formats, using the second indication information to indicate an index value corresponding to a set of symbol arrangement formats in a time slot. For example, Table 9 shows some possible time slot formats.

[0220] Table 9, Time Slot Table Index Table

[0221] In another embodiment, it may be pre-configured or agreed upon by protocol that the first symbol may be the last symbol of a downlink channel, or the first symbol may be the first symbol of an uplink channel.

[0222] For example, as shown in FIG15 , if the downlink channel occupies one symbol, this symbol can be designated as the first symbol P. If the downlink channel occupies more than one symbol, such as n symbols, then the 1st to n-1st symbols are conventional OFDM symbols, and the nth symbol, i.e., the last symbol, can be the first symbol P. For example, as shown in FIG16 , if the downlink channel occupies two symbols, the first symbol can be symbol D, and the second symbol can be the first symbol P.

[0223] Similarly, if the protocol stipulates, the first symbol is the first symbol of the uplink channel.

[0224] For example, if the uplink channel occupies one symbol, this symbol may be designated as the first symbol P. If the uplink channel occupies more than one symbol, such as n symbols, the first symbol may be the first symbol P, and the second to nth symbols are conventional OFDM symbols.

[0225] In another embodiment, the second indication information may be used to indicate a sequence number of at least one first symbol in the first time slot format, wherein the sequence number may refer to position information of the first symbol in the first time slot format.

[0226] Exemplarily, the second indication information is used to indicate the position information of the first symbol. If the receiving end, such as the first device, determines that the received signal includes the second indication information, it can be determined that the time slot format includes the first symbol; if the second indication information is not included, it can be determined that the time slot format does not include the first symbol and only includes conventional symbol types. Further, the first device can determine the position information of each first symbol based on the second indication information. For example, as shown in the first time slot format of Figure 17, the time slot includes a first symbol P with a serial number of 1, which means that the symbol position of the symbol P in the time slot is the second (the serial number of the first symbol is 0).

[0227] The above indication method can realize specific indication of the first symbol in a determined time slot format with less signaling overhead when the number of first symbols included in the time slot format is small, for example, the number of first symbols included in a time slot is 1 or 2, and the indication method is more flexible.

[0228] In addition, in one embodiment, the second indication information may be used to indicate information about the first symbol included in an uplink transmission symbol, a downlink transmission symbol, a flexible symbol, a frame structure, or a mini-time slot. Specifically, the second indication information may be used to indicate whether the uplink transmission symbol, the downlink transmission symbol, the flexible symbol, the frame structure, or the mini-time slot includes the first symbol; further, optionally, the second indication information may also indicate information about the number and / or position of the included first symbols.

[0229] In one embodiment, the time slot format can also be indicated in the following manner: first, a rough indication is made based on the existing time slot format indication method, such as indicating the second time slot format; and then the second indication information is further indicated. For example, the second indication information can indicate which one or several symbols in the second time slot format are the first symbols, thereby determining the specific time slot format through hierarchical indication.

[0230] The method includes: before receiving the second indication information, the first device may also receive third indication information, the third indication information being used to indicate a second time slot format, where the second time slot format includes at least one of an uplink symbol, a downlink symbol, or a flexible symbol. Exemplarily, the second time slot format may be configured for the first device via higher layer signaling; then, the second indication information is used to indicate to the first device that at least one symbol included in the second time slot format may be the first symbol.

[0231] At this time, the second indication information may include a sequence number of at least one symbol in the second time slot format, where the sequence number is used to indicate a sequence number of a first symbol included in the first time slot format.

[0232] Exemplarily, a symbol index table of a specific transmission type can be configured, and the second indication information can be used to indicate the different number of symbols under the transmission type, and the symbol type of each corresponding symbol can be specifically configured as a conventional OS symbol or as the first symbol P of an embodiment of the present application.

[0233] For example, taking downlink transmission as an example, some possible examples are shown in Table 10. The conventional OS symbol can be represented as O, which is used to indicate the existing symbol U, D, or F. For downlink transmission, the configurable conventional symbol can be the symbol D or the symbol F.

[0234] Table 10

[0235] Similarly, for uplink transmission, the symbol index table of uplink transmission can also be configured to indicate the different numbers of symbols in uplink transmission and the corresponding symbol types, specifically whether they are configured as conventional OS symbols or as the first symbol P.

[0236] For example, FIG18 shows some possible examples, in which a conventional OS symbol may be represented as O to indicate an existing symbol U, D, or F. Index 1 corresponds to Tx having 4 symbols, including 2 P symbols; index 2 corresponds to Tx having 5 symbols, including 5 P symbols; index 3 corresponds to Tx having 8 symbols, including 3 P symbols; and index 4 corresponds to Tx having 8 symbols, all of which are P symbols.

[0237] Optionally, the second indication information can be used to indicate whether an OFDM symbol, mini-slot, time slot, downlink channel, symbol F or frame reception in a mini-slot is a conventional OFDM symbol configured, or the first symbol P in an embodiment of the present application.

[0238] Exemplarily, as shown in FIG19 , if the second indication information is used to indicate a mini-slot, it can be determined based on the second indication information that the mini-slot is configured with symbol P, or a schematic diagram of a configured conventional OFDM symbol.

[0239] In one embodiment, the second indication information may be carried in at least one of the following: SIB1, RRC signal, DCI, SCI, Slot Format Indicator (SFI), or other physical layer signaling or higher layer signaling. Exemplarily, the slot format indication may be implemented through multi-level indication, such as the second device first sending an RRC signal carrying a configured slot format index table to the first device; then, the second device sends a DCI to the first device indicating one of the index values, so that the first device determines the first slot format.

[0240] In order to improve transmission reliability, the time slot format can be flexibly configured based on the capability of the receiving end through negotiation between the transmitting and receiving ends. As mentioned above, in a possible implementation, the method can also include the following steps.

[0241] 1. The first device sends capability information to the second device.

[0242] 2. The second device receives the capability information of the first device.

[0243] The capability information indicates whether the first device supports the first symbol and / or the type of the supported first symbol. Correspondingly, after successfully receiving the capability information from the first device, the second device can determine the first time slot format based on the capability information. Similarly, the specific method for indicating the capability information can be found in the aforementioned content and will not be further elaborated here.

[0244] In the above-mentioned implementation mode of the present application, the transceiver can determine the first time slot format to be used through the second indication information. Combined with the first indication information in the aforementioned embodiment, the specific type and format of the first symbol in the first time slot format can be determined, so that the transceiver can flexibly implement the configuration and indication of transmission resources and improve transmission efficiency.

[0245] It should be noted that the several implementation methods provided above in this application can be used individually or in combination, such as referring to the specific execution steps of each implementation method applied in the same process, which will not be described one by one in this application.

[0246] In addition, the present application also provides a communication device. As shown in FIG20 , the communication device 2000 may include a processing module 2001 and a communication module 2002 .

[0247] Specifically, the communication device 2000 can implement the functions of the transmitting end or the receiving end in each possible implementation manner described in Figure 11 or Figure 14 above. For details, please refer to the detailed descriptions in the above-mentioned method examples, which will not be repeated here.

[0248] For example, the communication device has the function of implementing the receiving end, such as the first device, in each possible embodiment described in FIG. 11 or FIG. 14 . The functions can be implemented by hardware or by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the functions.

[0249] For example, in the embodiments shown in FIG11 or FIG14 , if the communication device 2000 is used to implement the functions of the second device, the processing module 2001 may be used to determine the first symbol or the first time slot format. The communication module 2002 may be used to send the first indication information or the second indication information to the first device.

[0250] Exemplarily, for the implementation shown in Figure 11 or Figure 14, if the communication device 2000 is used to implement the function of the first device, the communication module 2002 is used to receive the first indication information or the second indication information, thereby determining the first symbol or determining the first time slot format.

[0251] The specific execution process and embodiments in the above-mentioned communication device can refer to the steps executed by the sending end or the receiving end in the above-mentioned method embodiment, and the related descriptions. The technical problems solved and the technical effects brought about can also refer to the contents described in the above-mentioned embodiments, and will not be repeated here one by one.

[0252] It can be understood that, in conjunction with Figure 20, each network element involved in the embodiments of the present application may adopt the composition structure shown in Figure 20 or include the components shown in Figure 20. Figure 20 is a schematic structural diagram of a communication device 2000 provided in an embodiment of the present application. When the communication device 2000 has the functions of the first device or the second device in the embodiments of the present application, the communication device 2000 can be a chip or system on a chip in the first device or the second device.

[0253] In the embodiment of the present application, the chip system can be composed of chips, or can include chips and other discrete devices.

[0254] 6 , illustratively, the functions / implementation processes of the processing module 2001 in FIG20 may be implemented by the processor 601 in FIG6 calling computer program instructions stored in the memory 603. For example, the functions / implementation processes of the communication module 2002 in FIG20 may be implemented by the communication interface 604 in FIG6 .

[0255] When the communication device 2000 is an electronic device, the communication module 2002 may be a transceiver, which may include an antenna and a radio frequency circuit, and the processing module 2001 may be a processor, such as a baseband chip. When the device is a component having the functions of the first device or the second device in the above-mentioned embodiment, the communication module 2002 may be a radio frequency unit, and the processing module 2001 may be a processor. When the device is a system-on-chip, the communication module 2002 may be the input interface and / or output interface of the system-on-chip, and the processing module 2001 may be the processor of the system-on-chip, such as a central processing unit (CPU).

[0256] In some embodiments, the processor 601 in Figure 6 can call the computer execution instructions stored in the memory 603 so that the device 600 can perform the operations of the first device or the second device in the above-mentioned method embodiments to implement the above-mentioned possible implementation methods of the present application.

[0257] In this embodiment, the communication device is presented in the form of various functional modules divided in an integrated manner. Here, "module" can refer to a specific circuit, a processor and memory that executes one or more software or firmware programs, an integrated logic circuit, and / or other devices that can provide the above-mentioned functions. In a simple embodiment, those skilled in the art will appreciate that the communication device can take the form shown in Figure 6 above.

[0258] In an exemplary embodiment, a computer-readable storage medium including instructions or a computer program product is also provided. The instructions can be executed by the processor 601 of the communication device 600 to perform the method of the above embodiment. Therefore, the technical effects that can be achieved can be referred to the above method embodiment and will not be repeated here.

[0259] The present application also provides a computer program product, which includes instructions. When the instructions are executed, the computer can respectively perform operations of a terminal device or a network device corresponding to the above method.

[0260] The present application also provides a system-on-chip (SoC), comprising a processing unit and a communication unit. The processing unit may be, for example, a processor, and the communication unit may be, for example, an input / output interface, a pin, or a circuit. The processing unit may execute computer instructions to cause the communication device implemented by the SoC to perform the operations of the terminal device and the network device in the methods provided in the embodiments of the present application.

[0261] Optionally, any one of the communication devices provided in the above embodiments of the present application may include the system chip.

[0262] Optionally, the computer instructions are stored in a storage unit.

[0263] An embodiment of the present application further provides a communication system, which may include: any one of the first device and second device in the above-mentioned implementation manners.

[0264] In the above embodiments, all or part of the embodiments may be implemented using software, hardware, firmware, or any combination thereof. When implemented using a software program, all or part of the embodiments may be implemented in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the processes or functions according to the embodiments of the present application are generated in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device.

[0265] The protocol described in this application may refer to a communication protocol or specification, such as the 3rd Generation Partnership Project (3GPP) communication protocol.

[0266] It is understood that in the embodiments of the present application, the terminal and / or the network device may perform some or all of the steps in the embodiments of the present application. These steps or operations are merely examples. In the embodiments of the present application, other operations or variations of various operations may also be performed. In addition, the various steps may be performed in a different order than those presented in the embodiments of the present application, and it is possible that not all of the operations in the embodiments of the present application need to be performed.

[0267] In this application, "at least one" means one or more, and "more than one" means two or more. "And / or" describes the relationship between associated objects, indicating that three possible relationships exist. For example, "A and / or B" can mean: A exists alone, A and B exist simultaneously, and B exists alone, where A and B can be singular or plural. In the text description of this application, the character " / " generally indicates that the associated objects are in an "or" relationship.

[0268] It should be noted that, in this application, words such as "exemplary" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described in this application as "exemplary" or "for example" should not be construed as being preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "for example" is intended to present the relevant concepts in a concrete manner.

[0269] In the various embodiments of the present application, unless otherwise specified or there is a logical conflict, the terms and / or descriptions between different embodiments are consistent and can be referenced by each other. The technical features in different embodiments can be combined to form new embodiments according to their inherent logical relationships.

[0270] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A communication method, characterized in that: The method comprises: Determine a first symbol, wherein the first symbol includes a first interval and a second interval, or includes a first interval and a third interval, or includes the first interval, the second interval, and the third interval, wherein the first interval is used to implement conversion from downlink transmission to uplink transmission, as a reserved resource or a guard interval, the second interval is used for uplink transmission, and the third interval is used for downlink transmission; Send first indication information, where the first indication information is used to indicate the first symbol.

2. A communication method, characterized in that: The method comprises: receiving first indication information, where the first indication information is used to indicate a first symbol, where the first symbol includes a first interval and a second interval, or includes a first interval and a third interval, or includes a first interval, a second interval, and a third interval, wherein the first interval is used to implement conversion from downlink transmission to uplink transmission, as a reserved resource or a guard interval, the second interval is used for uplink transmission, and the third interval is used for downlink transmission; A first symbol is determined according to the first indication information.

3. The method according to claim 1 or 2, characterized in that: The first indication information is used to indicate at least one of the following: The starting position of the first interval in the first symbol, the duration corresponding to the first interval, the ratio of the duration of the first interval to the duration of the first symbol, the duration occupied by the second interval in the first symbol, the ratio of the duration of the second interval to the duration of the first symbol, the duration occupied by the third interval in the first symbol, or the ratio of the duration of the third interval to the duration of the first symbol.

4. The method according to claim 3, characterized in that: The first symbol is preconfigured as follows: the starting position of the first interval is the starting position of the first symbol, or the ending position of the first interval is the ending position of the first symbol, or the starting position or the ending position of the first interval is the middle position of the first symbol, or the starting position and / or the ending position of the first interval is other positions in the first symbol except the starting position and the ending position.

5. The method according to claim 1 or 2, characterized in that: The first indication information includes a first index value, and the first index value corresponds to a first position and a first duration; The first position is used to indicate the starting position of the first interval in the first symbol, and the first duration is used to indicate the duration of the first interval in the first symbol; or, The first indication information includes a second index value, and the second index value corresponds to the second duration and the third duration; The second duration is used to indicate the duration of the third interval in the first symbol, and the third duration is used to indicate the duration of the second interval in the first symbol.

6. The method according to any one of claims 1 to 5, characterized in that: The first indication information is carried in at least one of the following: a system message block SIB1, a radio resource control RRC signal, downlink control information DCI or sidelink control information SCI.

7. The method according to any one of claims 1, 3, 4, 5 or 6, characterized in that: The method further comprises: Capability information of a first device is received, where the capability information is used to indicate whether the first device supports a first symbol and / or a type of supported first symbol.

8. The method according to any one of claims 2, 3, 4, 5 or 6, characterized in that: The method further comprises: Capability information is sent, where the capability information is used to indicate whether the first device supports the first symbol and / or the type of the supported first symbol.

9. The method according to claim 7 or 8, characterized in that: The capability information includes at least one of the following: information on whether the first device supports the first symbol, information on the first symbol type supported by the first device, information on the conversion cycle supported by the first device, or information on the capability of the first device to convert a received downlink signal into a sent uplink signal.

10. A communication method, characterized in that: The method comprises: Determine a first time slot format, wherein the first time slot format includes at least one first symbol, the first symbol includes a first interval and a second interval, or includes a first interval and a third interval, or includes a first interval, a second interval and a third interval, wherein the first interval is used to implement conversion from downlink transmission to uplink transmission, as a reserved resource or a guard interval, the second interval is used for uplink transmission, and the third interval is used for downlink transmission; Send second indication information to indicate the first time slot format.

11. A communication method, characterized in that: The method comprises: receiving second indication information, wherein the second indication information is used to indicate a first time slot format; wherein the first time slot format The method comprises at least one first symbol, wherein the first symbol comprises a first interval and a second interval, or comprises a first interval and a third interval, or comprises a first interval, a second interval and a third interval, wherein the first interval is used to implement conversion from downlink transmission to uplink transmission, and serves as a reserved resource or a guard interval, the second interval is used for uplink transmission, and the third interval is used for downlink transmission; Determine the first time slot format according to the second indication information.

12. The method according to claim 10 or 11, characterized in that: The second indication information is used to indicate position information of the at least one first symbol.

13. The method according to claim 10 or 11, characterized in that: The first symbol is the last symbol of a downlink channel, or the first symbol is the first symbol of an uplink channel.

14. The method according to claim 12, characterized in that The second indication information is used to indicate a sequence number of the at least one first symbol in the first time slot format.

15. The method according to claim 11, characterized in that Before receiving the second indication information, the method further includes: receiving third indication information, where the third indication information is used to indicate a second time slot format, where the second time slot format includes at least one of an uplink symbol, a downlink symbol, or a flexible symbol; The second indication information includes a sequence number of at least one symbol in the second time slot format, where the sequence number is used to indicate a sequence number of the first symbol in the first time slot format.

16. The method according to any one of claims 10 to 15, characterized in that: The second indication information is used to indicate information of the first symbol included in an uplink transmission symbol, a downlink transmission symbol, a flexible symbol, a frame structure or a mini-time slot.

17. The method according to any one of claims 10 to 16, characterized in that: The second indication information is carried in at least one of the following: system message block SIB1, radio resource control RRC signal, downlink control information DCI, sidelink control information SCI or time slot format indication SFI.

18. The method according to any one of claims 10 to 16, characterized in that: The method further comprises: Receive / send capability information of a first device, where the capability information is used to indicate whether the first device supports a first symbol and / or a type of supported first symbol.

19. The method according to claim 17 or 18, characterized in that The capability information includes at least one of the following: information on whether the first device supports the first symbol, information on the first symbol type supported by the first device, information on the conversion cycle supported by the first device, or information on the capability of the first device to convert a received downlink signal into a sent uplink signal.

20. A communication device, characterized in that: The device comprises: A processing module, configured to determine a first symbol, wherein the first symbol includes a first interval and a second interval, or includes a first interval and a third interval, or includes the first interval, the second interval, and the third interval, wherein the first interval is used to implement a conversion from downlink transmission to uplink transmission, as a reserved resource or a guard interval, the second interval is used for uplink transmission, and the third interval is used for downlink transmission; The communication module is used to send first indication information, where the first indication information is used to indicate the first symbol.

21. A communication device, characterized in that: The device comprises: A communication module, configured to receive first indication information, where the first indication information is used to indicate a first symbol, where the first symbol includes a first interval and a second interval, or includes a first interval and a third interval, or includes the first interval, the second interval, and the third interval, wherein the first interval is used to implement conversion from downlink transmission to uplink transmission, as a reserved resource or a protection interval, the second interval is used for uplink transmission, and the third interval is used for downlink transmission; A processing module is used to determine a first symbol according to the first indication information.

22. The device according to claim 20 or 21, characterized in that The first indication information is used to indicate at least one of the following: The starting position of the first interval in the first symbol, the duration corresponding to the first interval, the ratio of the duration of the first interval to the duration of the first symbol, the duration occupied by the second interval in the first symbol, the ratio of the duration of the second interval to the duration of the first symbol, the duration occupied by the third interval in the first symbol, or the ratio of the duration of the third interval to the duration of the first symbol.

23. The device according to claim 22, characterized in that The first symbol is preconfigured as follows: the starting position of the first interval is the starting position of the first symbol, or the ending position of the first interval is the ending position of the first symbol, or the starting position or the ending position of the first interval is the middle position of the first symbol, or the starting position and / or the ending position of the first interval is other positions in the first symbol except the starting position and the ending position.

24. The device according to claim 20 or 21, characterized in that The first indication information includes a first index value, and the first index value corresponds to a first position and a first duration; The first position is used to indicate the starting position of the first interval in the first symbol, and the first duration is used to indicate the duration of the first interval in the first symbol; or, The first indication information includes a second index value, and the second index value corresponds to the second duration and the third duration; The second duration is used to indicate the duration of the third interval in the first symbol, and the third duration is used to indicate the duration of the second interval in the first symbol.

25. The device according to any one of claims 20 to 24, characterized in that The first indication information is carried in at least one of the following: a system message block SIB1, a radio resource control RRC signal, downlink control information DCI or sidelink control information SCI.

26. The device according to any one of claims 20 to 25, characterized in that The communication module is further used to receive / send capability information of the device, where the capability information is used to indicate whether the device supports the first symbol and / or the type of the supported first symbol.

27. The device according to claim 26, characterized in that The capability information includes at least one of the following: information on whether the device supports the first symbol, information on the first symbol type supported by the device, information on the conversion cycle supported by the device, or information on the device's ability to convert a received downlink signal into a sent uplink signal.

28. A communication device, characterized in that: The device comprises: A processing module, configured to determine a first time slot format, wherein the first time slot format includes at least one first symbol, the first symbol includes a first interval and a second interval, or includes a first interval and a third interval, or includes a first interval, a second interval and a third interval, wherein the first interval is used to implement a conversion from downlink transmission to uplink transmission, as a reserved resource or a protection interval, the second interval is used for uplink transmission, and the third interval is used for downlink transmission; The communication module is used to send second indication information, which is used to indicate the first time slot format.

29. A communication device, characterized in that: The device comprises: A communication module, configured to receive second indication information, where the second indication information is used to indicate a first time slot format, wherein the first time slot format includes at least one first symbol, the first symbol includes a first interval and a second interval, or includes a first interval and a third interval, or includes a first interval, a second interval and a third interval, the first interval is used to implement conversion from downlink transmission to uplink transmission, as a reserved resource or a protection interval, the second interval is used for uplink transmission, and the third interval is used for downlink transmission; A processing module is used to determine the first time slot format according to the second indication information.

30. The device according to claim 28 or 29, characterized in that The second indication information is used to indicate position information of the at least one first symbol.

31. The device according to claim 28 or 29, characterized in that The first symbol is the last symbol of a downlink channel, or the first symbol is the first symbol of an uplink channel.

32. The device according to claim 30, characterized in that The second indication information is used to indicate a sequence number of the at least one first symbol in the first time slot format.

33. The device according to claim 29, characterized in that The communication module is also used for: receiving third indication information, where the third indication information is used to indicate a second time slot format, where the second time slot format includes at least one of an uplink symbol, a downlink symbol, or a flexible symbol; The second indication information includes a sequence number of at least one symbol in the second time slot format, where the sequence number is used to indicate a sequence number of the first symbol in the first time slot format.

34. The device according to any one of claims 28 to 33, characterized in that The second indication information is used to indicate information of the first symbol included in an uplink transmission symbol, a downlink transmission symbol, a flexible symbol, a frame structure or a mini-time slot.

35. The device according to any one of claims 28 to 34, characterized in that The second indication information is carried in at least one of the following: system message block SIB1, radio resource control RRC signal, downlink control information DCI, sidelink control information SCI or time slot format indication SFI.

36. The device according to any one of claims 28 to 35, characterized in that The communication module is further used to receive or send capability information of the device, where the capability information is used to indicate whether the device supports the first symbol and / or the type of the supported first symbol.

37. The device according to claim 36, characterized in that The capability information includes at least one of the following: information on whether the device supports the first symbol, information on the first symbol type supported by the device, information on the conversion cycle supported by the device, or information on the device's ability to convert a received downlink signal into a sent uplink signal.

38. A communication device, characterized in that: include: one or more processors and one or more memories; The one or more memories are coupled to the one or more processors, and the one or more memories are used to store computer program codes, wherein the computer program codes include computer instructions. When the one or more processors execute the computer instructions, the communication device executes the method according to any one of claims 1 to 19.

39. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer-executable instructions, and when the computer-executable instructions are called by the computer, the computer is used to enable the computer to execute the method described in any one of claims 1 to 19.

40. A computer program product, characterized in that When the computer program product is run on a computer, the computer is caused to execute the method according to any one of claims 1 to 19.

Images