A communication method and apparatus

Abstract

The application provides a communication method and device to solve the problem of large signaling overhead caused by resource scheduling in a slow channel changing scene. In the application, the first signaling received by the terminal device includes first indication information of first information associated with the first signal and the second signal, the terminal device receives second signaling, the second signaling indicates that the terminal device receives the second signal in a second time unit, the second signaling does not include indication information of the first information associated with the second signal, and the terminal device receives the second signal in the second time unit according to the first indication information and the second signaling. Since the second signaling no longer carries the indication information of the first information associated with the second signal, the overhead of the second signaling is reduced, and the communication efficiency is improved.

Description

TECHNICAL FIELD

[0001] Embodiments of the present application relate to the field of wireless communication, and in particular, to a communication method and apparatus. BACKGROUND

[0002] In a 5th generation (5G) new radio (NR) system and a long term evolution (LTE) system, a network device sends a downlink control information (DCI) to a terminal device in each time slot, which is used to instruct the terminal device to receive a physical downlink shared channel (PDSCH) in a plurality of continuous time slots, and each DCI includes an indication field used to indicate a frequency domain position of the PDSCH and an antenna port.

[0003] For a terminal device with a slowly changing channel, when the terminal device needs to receive a PDSCH in a plurality of continuous time slots, the network device sends a DCI to the terminal device in each time slot, which is used to schedule the PDSCH, and the DCI in each time slot carries a frequency domain resource indication field and an antenna port indication field indicating the same content, thereby increasing unnecessary signaling overhead. SUMMARY

[0004] Embodiments of the present application provide a communication method and device for reducing signaling overhead.

[0005] In a first aspect, the present application provides a communication method. The execution subject of the method can be a terminal device or a chip applied in the terminal device. Hereinafter, the execution subject is taken as an example to be described. The terminal device can receive a first signaling from a network device, the first signaling instructing the terminal device to receive a first signal in a first time unit, and the first signaling including first indication information of first information associated with the first signal and a second signal. The terminal device can receive the first signal in the first time unit according to the first signaling. The terminal device receives a second signaling, the second signaling instructing the terminal device to receive a second signal in a second time unit, and the second signaling not including indication information of the first information associated with the second signal. The terminal device can receive the second signal in the second time unit according to the first indication information and the second signaling. The first information includes at least one of frequency domain resource information, modulation and coding strategy information, antenna port information, or bandwidth part information.

[0006] The above manner can enable the second signaling to not carry the indication information used for indicating the first information associated with the second signal, thereby reducing the overhead of the indication information carried in the second signaling and improving communication efficiency. Further, for a terminal device with a slowly changing channel, the channel quality of the terminal device and the network device in a plurality of consecutive time slots is almost unchanged, and thus the network device transmits signals to the terminal device in the plurality of consecutive time slots by using one or more of the same frequency domain resource, modulation and coding strategy, antenna port, or bandwidth part, and thus does not have a negative impact on transmission performance, thereby being capable of reducing the overhead of transmitting the second signaling without reducing communication quality.

[0007] In a possible design, the terminal device receives the second signal in the second time unit according to the first indication information and the second signaling, including that the terminal device can determine the first information associated with the second signal according to the first indication information, and receive the second signal in the second time unit according to the first information and the second signaling. The above manner enables the terminal device to determine the first information corresponding to the second signal, so that the terminal device can correctly receive the second signal, thereby being capable of reducing the overhead of transmitting the second signaling without reducing communication quality.

[0008] In a possible design, the indication information of the first information includes frequency domain resource indication information and antenna port indication information, and the terminal device determines the frequency domain resource occupied by the second signal and the antenna port number corresponding to the frequency domain resource according to the frequency domain resource indication information and the antenna port indication information respectively, and receives the second signal in the second time unit according to the frequency domain resource occupied by the second signal, the antenna port number corresponding to the frequency domain resource, and the second signaling. The above manner enables the terminal device to determine the frequency domain resource and the antenna port number corresponding to the second signal, so that the terminal device can correctly receive the second signal, thereby being capable of reducing the overhead of transmitting the second signaling without reducing communication quality.

[0009] In a possible design, the first time unit and the second time unit each include one or more time slots, mini-slots, or symbols. For example, the first time unit and the second time unit are each a time slot, and the first time unit and the second time unit do not overlap in time. The above manner enables the first signal and the second signal to not interfere with each other in time domain, so that the terminal device can correctly receive the first signal and the second signal, thereby being capable of reducing the overhead of transmitting the second signaling without reducing communication quality.

[0010] In a possible design, the first time unit and the second time unit correspond to a same uplink-downlink switching period. The uplink-downlink switching period can be a period of time in which switching from a sending signal to a receiving signal can be performed only once. Therefore, the above manner can ensure phase continuity of the first signal and the second signal, so that the terminal device can receive a demodulation reference signal corresponding to the first signal when receiving the second signal, and the receiving performance of the second signal is improved.

[0011] In a second aspect, the present application provides a communication method. The execution subject of the method can be a network device or a chip applied in the network device. Hereinafter, the execution subject is taken as an example to be described. The beneficial effects can be referred to the first aspect, and will not be described here.

[0012] The network device can send a first signaling to the terminal device, where the first signaling is used to instruct the terminal device to receive a first signal in a first time unit, and the first signaling includes first indication information of first information associated with the first signal and a second signal. The network device can send the first signal in the first time unit. The network device sends a second signaling to the terminal device, where the second signaling is used to instruct the terminal device to receive a second signal in a second time unit, and the second signaling does not include indication information of the first information associated with the second signal. The network device can send the second signal to the terminal device in the second time unit. The first information includes at least one of frequency domain resource information, modulation and coding strategy information, antenna port information, and bandwidth part information.

[0013] In a possible design, before the network device sends the first signaling to the terminal device, the network device also needs to determine that the first information associated with the first signal and the second signal is the same.

[0014] In a possible design, the first time unit and the second time unit respectively include one or more time slots, micro time slots, or symbols. For example, the first time unit and the second time unit are one time slot respectively, and the first time unit and the second time unit do not overlap in time. The first time unit and the second time unit correspond to a same uplink-downlink switching period.

[0015] In a third aspect, a communication apparatus is provided. Benefits can be derived from the description of the first aspect and will not be repeated here. The communication apparatus has the functionality to implement the actions of the method examples of the first aspect described above. The functionality can be implemented by hardware, or by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the functionality described above. In one possible design, the communication apparatus includes a storage module and a transceiver module. The storage module is configured to store computer programs or instructions. The transceiver module is configured to receive a first signaling from a network device, where the first signaling indicates the terminal device to receive a first signal in a first time unit, and the first signaling includes first indication information of first information associated with the first signal and a second signal. The transceiver module is configured to receive the first signal in the first time unit according to the first signaling, receive a second signaling, where the second signaling indicates the terminal device to receive a second signal in a second time unit, and the second signaling does not include indication information of the first information associated with the second signal. The transceiver module is configured to receive the second signal in the second time unit according to the first indication information and the second signaling. These modules can perform the corresponding functions in the method examples of the first aspect described above. Details can be found in the description of the method examples, and will not be repeated here.

[0016] In a fourth aspect, a communication apparatus is provided. Benefits can be derived from the description of the second aspect and will not be repeated here. The communication apparatus has the functionality to implement the actions of the method examples of the second aspect described above. The functionality can be implemented by hardware, or by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the functionality described above. In one possible design, the communication apparatus includes a storage module and a transceiver module. The storage module is configured to store computer programs or instructions. The transceiver module is configured to send a first signaling to a terminal device, where the first signaling indicates the terminal device to receive a first signal in a first time unit, and the first signaling includes first indication information of first information associated with the first signal and a second signal. The transceiver module is configured to send the first signal in the first time unit. The transceiver module is configured to send a second signaling to the terminal device, where the second signaling indicates the terminal device to receive a second signal in a second time unit, and the second signaling does not include indication information of the first information associated with the second signal. The transceiver module is configured to send the second signal to the terminal device in the second time unit. These modules can perform the corresponding functions in the method examples of the second aspect described above. Details can be found in the description of the method examples, and will not be repeated here.

[0017] In a fifth aspect, a communication apparatus is provided. The communication apparatus can be a terminal device in the method embodiments described above, or a chip configured in the terminal device. The communication apparatus includes a communication interface and a processor, and optionally, a memory. The memory is configured to store computer programs or instructions. The processor is coupled to the memory and the communication interface. When the processor executes the computer programs or instructions, the communication apparatus performs the method performed by the terminal device in the method embodiments described above.

[0018] In a sixth aspect, a communication apparatus is provided. The communication apparatus can be a network device in the method embodiments described above, or a chip configured in the network device. The communication apparatus includes a communication interface and a processor, and optionally, a memory. The memory is configured to store computer programs or instructions. The processor is coupled to the memory and the communication interface. When the processor executes the computer programs or instructions, the communication apparatus performs the method performed by the network device in the method embodiments described above.

[0019] In a seventh aspect, a computer program product is provided. The computer program product includes computer program codes. When the computer program codes are executed, the method performed by the terminal device in the aspects described above is performed.

[0020] In an eighth aspect, a computer program product is provided. The computer program product includes computer program codes. When the computer program codes are executed, the method performed by the network device in the aspects described above is performed.

[0021] In a ninth aspect, a chip system is provided. The chip system includes a processor configured to implement the functions of the terminal device in the methods of the aspects described above. In a possible design, the chip system further includes a memory configured to store program instructions and / or data. The chip system can be composed of a chip, or include a chip and other discrete devices.

[0022] In a tenth aspect, a chip system is provided. The chip system includes a processor configured to implement the functions of the network device in the methods of the aspects described above. In a possible design, the chip system further includes a memory configured to store program instructions and / or data. The chip system can be composed of a chip, or include a chip and other discrete devices.

[0023] In an eleventh aspect, a computer readable storage medium is provided. The computer readable storage medium stores a computer program. When the computer program is executed, the method performed by the terminal device in the aspects described above is implemented.

[0024] In a twelfth aspect, this application provides a computer-readable storage medium storing a computer program that, when run, implements the methods executed by the network device in the above aspects. Attached Figure Description

[0025] Figure 1 A schematic diagram of the architecture of a mobile communication system used in the embodiments of this application;

[0026] Figure 2 This is a possible resource diagram in an embodiment of this application;

[0027] Figure 3 This is a schematic diagram illustrating a possible configuration of the DMRS port according to an embodiment of this application;

[0028] Figure 4 This is a schematic diagram illustrating the correspondence between subframes, symbols, time slots, and microtime slots in an embodiment of this application;

[0029] Figure 5A This is a schematic diagram of a possible communication method in an embodiment of this application;

[0030] Figure 5B This is a schematic diagram illustrating another possible communication method in an embodiment of this application;

[0031] Figure 6 This is a schematic diagram of a possible time unit in an embodiment of this application;

[0032] Figure 7 This is a schematic diagram of the communication device 700 in an embodiment of this application;

[0033] Figure 8 This is a schematic diagram of the communication device 800 in an embodiment of this application. Detailed Implementation

[0034] like Figure 1 The diagram shown illustrates a possible network architecture applicable to an embodiment of this application, including a terminal device 110 and an access network device 120. The terminal device 110 and the access network device 120 can communicate via a Uu air interface, which can be understood as a universal UE to network interface between a terminal device and a network device. Uu air interface transmission includes uplink and downlink transmission.

[0035] The uplink transmission refers to the transmission of uplink information from the terminal device 110 to the access network device 120. The uplink information can include one or more of uplink data information, uplink control information, and a reference signal (RS). A channel used for transmitting the uplink information is referred to as an uplink channel, which can be a physical uplink shared channel (PUSCH) or a physical uplink control channel (PUCCH). The PUSCH is used to carry uplink data, which can also be referred to as uplink data information. The PUCCH is used to carry uplink control information (UCI) fed back by the terminal device. The UCI can include channel state information (CSI), an acknowledgement (ACK) / negative acknowledgement (NACK), and the like.

[0036] The downlink transmission refers to the transmission of downlink information from the access network device 120 to the terminal device 110. The downlink information can include one or more of downlink data information, downlink control information, and a downlink reference signal. The downlink reference signal can be a channel state information reference signal (CSI-RS) or a phase tracking reference signal (PTRS). A channel used for transmitting the downlink information is referred to as a downlink channel, which can be a physical downlink shared channel (PDSCH) or a physical downlink control channel (PDCCH). The PDCCH is used to carry downlink control information (DCI), and the PDSCH is used to carry downlink data, which can also be referred to as downlink data information.

[0037] Optionally, in the method, Figure 1The network architecture shown may also include a core network device 130. Terminal device 110 can connect wirelessly to access network device 120, and access network device 120 can connect to core network device 130 via wired or wireless means. Core network device 130 and access network device 120 can be independent and different physical devices, or they can be the same physical device integrating all or part of the logical functions of core network device 130 and access network device 120.

[0038] It should be noted that, in Figure 1 In the network architecture shown, the terminal device 110 can be fixed or movable, and this application does not limit it. Figure 1 The network architecture shown may also include other network devices, such as wireless relay devices and wireless backhaul devices, which are not limited in this application. Figure 1 In the architecture shown, there is no limit to the number of terminal devices, access network devices, and core network devices.

[0039] The technical solutions in this application can be applied to various communication systems, such as Long Term Evolution (LTE) systems, 5th Generation (5G) mobile communication systems, and future mobile communication systems.

[0040] based on Figure 1 The network architecture provided typically employs Orthogonal Frequency Division Multiplexing Access (OFDMA) as its multiple access method. The main characteristic of OFDMA is that it divides transmission resources into mutually orthogonal time-frequency resource elements (REs). Network devices and terminal devices transmit signals through REs. Because different REs are orthogonal, the terminal device can receive the signal transmitted on each RE individually. Considering the fading characteristics of wireless channels, the signal carried on an RE will be distorted after transmission through the channel; this channel distortion is usually referred to as the channel coefficient. To enable signal recovery at the terminal device, a reference signal-based scheme is typically used to estimate the channel coefficient. That is, the network device transmits a known signal on a specific RE, and the terminal device estimates the channel coefficient based on the received signal and the known signal. The estimated channel coefficient is then used to interpolate the channel coefficients on other REs, thus facilitating signal reception and demodulation using the estimated channel coefficient.

[0041] In the existing wireless communication system, the base station is equipped with multiple antennas to realize spatial multiplexing transmission by using multiple input multiple output (MIMO) technology, that is, multiple data are transmitted on the same time-frequency resource, each data is transmitted on an independent spatial layer, and each spatial layer is mapped to a different antenna port for transmission. Considering that the channel coefficients of different antenna ports to the terminal are not the same, in order to enable the terminal device to obtain the information transmitted on multiple spatial layers, the channel coefficients between each antenna port and the terminal need to be estimated, so different DMRS needs to be configured for each antenna port, and the DMRS corresponding to different antenna ports can be multiplexed by time division, frequency division and code division, etc. For example, as shown in Figure 2 , where the horizontal direction represents the time domain and the vertical direction represents the frequency domain, each small square represents one RE, and DMRS ports 0 and 1 are multiplexed by orthogonal codes, so the REs corresponding to the two ports are also called a code division multiplexing (CDM) group. In the example of the following figure, the total number of DMRS ports is 6, and the number of CDM groups is 3.

[0042] 5G NR supports fixed access nodes, which are usually installed in fixed positions such as windows, roofs, etc. Once installed, the position does not change with time, so the speed of change of its channel quality with time is lower than that of the mobile phone channel quality. Generally, for fixed access nodes, it can be understood that the channel state between the network device and the terminal device is approximately equal in the continuous N time units, at this time, for M time units in the N time units, DMRS can not be configured, and the channel estimated by the DMRS in the preceding time unit is used for data demodulation, thereby reducing the pilot overhead. Wherein, the time unit can be a time slot, and M and N are integers, M < N. As shown below Figure 3 , 2 DMRS symbols are configured in time slot #0, and no DMRS symbol is configured in subsequent time slots #1 to #N.

[0043] In an application scenario where a channel changes slowly, a network device sends a DCI to a terminal device in each time unit, for instructing the terminal device to receive a PDSCH from the network device in a plurality of continuous time units, and indication information for indicating a corresponding frequency domain position, an antenna port, etc. of the PDSCH is included in each DCI. However, for a terminal device whose channel changes slowly, when the terminal device needs to receive a PDSCH in a plurality of continuous time units, the network device sends a DCI to the terminal in each time unit, for scheduling the PDSCH, and the DCI in each time unit carries a frequency domain resource indication field and an antenna port indication field indicating the same content, thus increasing unnecessary signaling overhead.

[0044] Based on the above, the present application provides a communication method, the principle of which is that first indication information of first information associated with a first signal and a second signal is included in first signaling received by a terminal device, second signaling received by the terminal device does not include indication information of the first information associated with the second signal, and the terminal device can receive the second signal according to the first indication information and the second signaling. Since the first indication information of the first information associated with the second signal is no longer carried in the second signaling, the overhead of the indication information carried in the second signaling can be reduced, and the communication efficiency is improved.

[0045] Some terms or phrases used in the present application are explained below, which are also part of the invention.

[0046] I. Network device

[0047] The wireless access network device is an access device through which a terminal device accesses the mobile communication system by wireless means. The wireless access network device can be a base station, an evolved NodeB (eNodeB), a transmission reception point (TRP), a next generation NodeB (gNB) in a 5G mobile communication system, a base station in a future mobile communication system, or an access node in a WiFi system, etc. The wireless access network device can also be a module or unit that completes part of the function of a base station, for example, it can be a central unit (CU) or a distributed unit (DU). The wireless access network device can also be a road side unit (RSU) in a V2X technology. The base station can be used to convert the received air frames and Internet Protocol (IP) packets into each other, serving as a router between the terminal device and the rest of the access network, which can include an IP network. The RSU can be a fixed infrastructure entity that supports vehicle-to-everything (V2X) applications and can exchange messages with other entities that support V2X applications. The access network device can also coordinate the management of the properties of the air interface. The embodiments of the present application do not limit the specific technology and specific device form adopted by the wireless access network device. In the present application, the wireless access network device is referred to as a network device, and if not otherwise specified, the network device refers to the wireless access network device.

[0048] II. Terminal device

[0049] The terminal device can also be referred to as a terminal, user equipment (UE), mobile station (MS), mobile terminal (MT), etc. The terminal device can be a mobile phone, a tablet computer, a computer with wireless transceiver function, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal in industrial control, a wireless terminal in self driving, a wireless terminal in remote medical surgery, a wireless terminal in smart grid, a wireless terminal in transportation safety, a wireless terminal in smart city, a wireless terminal in smart home, etc. Embodiments of the present application do not limit the specific technology and specific device form of the terminal device.

[0050] In the embodiments of the present application, the apparatus for implementing the function of the network device can be a network device, or an apparatus capable of supporting the network device to implement the function, such as a chip system, which can be installed in the network device. In the technical solutions provided in the embodiments of the present application, the apparatus for implementing the function of the network device is taken as an example to describe the technical solutions provided in the embodiments of the present application.

[0051] The network device and the terminal device can be deployed on land, including indoor or outdoor, handheld or vehicle-mounted; can also be deployed on water surface; can also be deployed on aircraft, balloons and artificial satellites in the air. Embodiments of the present application do not limit the application scenarios of the network device and the terminal device.

[0052] The network device and the terminal device can communicate through licensed spectrum, can also communicate through unlicensed spectrum, and can also communicate through both licensed spectrum and unlicensed spectrum. The network device and the terminal device can communicate through spectrum below 6 gigahertz (GHz), can also communicate through spectrum above 6 GHz, and can also communicate through both spectrum below 6 GHz and spectrum above 6 GHz. Embodiments of the present application do not limit the spectrum resources used between the network device and the terminal device.

[0053] In the embodiments of the present application, the time domain symbol can be an orthogonal frequency division multiplexing (OFDM) symbol or a single carrier-frequency division multiplexing (SC-FDM) symbol. If not specified, the symbol in the embodiments of the present application refers to a time domain symbol.

[0054] III. Time unit

[0055] The time unit is a time domain unit for data transmission, which can include a radio frame, a subframe, a slot, a mini-slot, a time domain symbol, and the like. In 5G new radio (NR), one radio frame can include 10 subframes, and one subframe can include one or more slots. Specifically, the number of slots included in one subframe is related to the subcarrier spacing.

[0056] The frame structure parameter (numerology) can include a subcarrier spacing and / or a cyclic prefix (CP) type. The CP type can also be referred to as a CP length, or simply a CP. The CP type can be an extended CP or a normal CP. One slot under the extended CP can include 12 time domain symbols, and one slot under the normal CP can include 14 time domain symbols. The time domain symbol can be referred to as a symbol. The time domain symbol can be an orthogonal frequency division multiplexing (OFDM) symbol or a discrete fourier transform spread orthogonal frequency division multiplexing (DFT-s-OFDM) symbol. In the embodiments of the present application, the time domain symbol is taken as an example for description.

[0057] As shown in Table 1, in the NR system, five frame structure parameters can be supported, numbered 0 to 4. For example, the frame structure parameter numbered 2 is: the subcarrier spacing is 60 kHz, and the CP is a normal CP or an extended CP.

[0058] Table 1. Supported frame structure parameters (numerologies)

[0059]

[0060] Different time slot lengths can exist for different subcarrier spacings. For example, when the subcarrier spacing is 15kHz, one time slot is 1 millisecond (ms); when the subcarrier spacing is 30kHz, one time slot is 0.5ms. A micro-time slot, also known as a mini-time slot, can be a smaller unit than a time slot. A micro-time slot can include one or more symbols. For example, a micro-time slot can include 2 symbols, 4 symbols, or 7 symbols, etc. A time slot can include one or more micro-time slots.

[0061] like Figure 4 As shown, taking a subcarrier spacing of 15kHz as an example, one radio frame lasts for 10ms, each subframe lasts for 1ms, one radio frame includes 10 subframes, each time slot lasts for 1ms, each subframe may include one time slot, and each time slot may include 14 symbols. Furthermore, micro-time slots may include 4 symbols, 2 symbols, or 7 symbols, etc.

[0062] IV. Frequency Domain Unit

[0063] A frequency domain unit may include one or more resource blocks (RBs), resource elements (REs), resource block groups (RBGs), or resource element groups (REGs). For example, an RBG may include one or more RBs, such as 6; an RB may include one or more REs, such as 12; and a REG may include a time-domain symbol in the time domain and an RB in the frequency domain.

[0064] V. Antenna Port

[0065] An antenna port is a logical port used for transmission, and one antenna port includes multiple physical antennas. From the perspective of the terminal device, each antenna port corresponds to an independent wireless channel.

[0066] VI. Demodulation Reference Signal

[0067] A demodulation reference signal (DMRS) is a reference signal used for recovering a received signal. The DMRS is a signal known to a terminal device. The terminal device can determine a fading characteristic of a wireless channel, that is, a channel coefficient of the wireless channel, according to the received signal and the DMRS, and the channel coefficient is used for recovering the received signal. In a 5G NR system, considering that channel coefficients of different antenna ports to the terminal device are not the same, in order for the terminal device to obtain information transmitted on multiple spatial layers, the channel coefficient between each antenna port and the terminal device needs to be estimated, and therefore different DMRSs need to be configured for each antenna port. The DMRSs corresponding to different antenna ports can be multiplexed in a time division, frequency division, code division, or the like. Currently, a 5G NR system can support a maximum of 12 MDRS ports.

[0068] In the embodiments of the present application, "at least one" means one or more, and "multiple" means two or more. The "and / or" describes the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B can represent: A exists alone, A and B exist together, and B exists alone, where A and B can be singular or plural. The character " / " generally represents an "or" relationship between the associated objects before and after it. "At least one of the following" or the like means any combination of these items, including single item or any combination of multiple items. For example, at least one of a, b, or c can represent: a, b, c, a-b, a-c, b-c, or a-b-c, where a, b, and c can be single or multiple.

[0069] In addition, unless otherwise stated, the ordinal numbers "first", "second", and the like mentioned in the embodiments of the present application are used to distinguish a plurality of objects, and are not used to limit the order, time sequence, priority, or importance of the plurality of objects. For example, the first information and the second information are only used to distinguish different signaling, and do not mean that the contents, priority, sending order, or importance of the two kinds of information are different.

[0070] As described above, some concepts related to the embodiments of the present application are introduced, and the embodiments of the present application are described below. As shown in Figure 5A The embodiments of the present application provide a flowchart of a communication method, which can be executed by a terminal device and a network device, or can be executed by a chip in the terminal device and a chip in the network device. Figure 5A The network device in the method can be the network device described above Figure 1 The access network device 120 in the method can be the access network device described above Figure 1 The terminal device in the method can be the terminal device 110 described above. Figure 5A The method shown in the figure can include the following operations.

[0071] 501、network device sends first signaling to terminal device. Correspondingly, the terminal device receives the first signaling.

[0072] The first signaling is used to instruct the terminal device to receive a first signal in a first time unit, and the first signaling includes first indication information of first information associated with the first signal and a second signal. For example, the first information is frequency domain resource information, and the first signaling includes first indication information of frequency domain resource information associated with the first signal and first indication information of frequency domain resource information associated with the second signal.

[0073] As shown in FIG. 5, before step 501, the method can further include that the network device determines that the first information associated with the first signal and the second signal is the same. Figure 5B

[0074] 502、the network device sends the first signal in the first time unit. Correspondingly, the terminal device receives the first signal in the first time unit according to the first signaling.

[0075] 503、the network device sends second signaling to the terminal device. Correspondingly, the terminal device receives the second signaling.

[0076] The second signaling is used to instruct the terminal device to receive a second signal in a second time unit, and the second signaling does not include indication information of first information associated with the second signal.

[0077] The first indication information of the first information in step 501 is associated with the second signal, and in step 503, the second signaling does not include any indication information of the first information associated with the second signal. In other words, in step 501, the first signal and the second signal are associated with the same first indication information. And in step 503, the indication information refers to any indication information of the first information associated with the second signaling. The indication information of the first information refers to indication information that is functionally used to indicate the first information associated with the second signaling. And the first indication information of the first information in step 501 is specific, that is, the specific indication information included in the first signaling.

[0078] 504、the network device sends the second signal to the terminal device in the second time unit. Correspondingly, the terminal device receives the second signal in the second time unit according to the first indication information and the second signaling.

[0079] ​In an implementation of step 504, the terminal device determines the first information associated with the second signal according to the indication information of the first information, and receives the second signal in the second time unit according to the first information and the second signaling.

[0080] In one example, the first information includes at least one of frequency domain resource information, modulation and coding strategy information, antenna port information, bandwidth part information, DMRS sequence initialization information, a transmission power control command of a scheduled PUCCH, and a PUCCH resource index.

[0081] Before the terminal device receives the second signal in the second time unit according to the indication information of the first information and the second signaling in step 504, the terminal device can determine the resource occupied by the second signal in any of the following ways.

[0082] For example, the first information can be frequency domain resource information, modulation and coding strategy information, antenna port information, bandwidth part information, DMRS sequence initialization information, a transmission power control command of a scheduled PUCCH, or a PUCCH resource index. For example, when the first information is frequency domain resource information, the terminal device determines the frequency domain resource occupied by the second signal according to the indication information of the frequency domain resource, and receives the second signal according to the frequency domain resource occupied by the second signal and the second signaling. When the first information is antenna port information, the terminal device determines the antenna port corresponding to the second signal according to the indication information of the antenna port information, and receives the second signal according to the antenna port corresponding to the second signal and the second signaling. When the first information is modulation and coding strategy information, the terminal device determines the modulation and coding information corresponding to the second signal according to the indication information of the modulation and coding information, and receives the second signal according to the modulation and coding information corresponding to the second signal and the second signaling. When the first information is bandwidth part information, the terminal device determines the bandwidth part corresponding to the second signal according to the indication information of the bandwidth part information, and receives the second signal according to the bandwidth part information corresponding to the second signal and the second signaling. When the first information is DMRS sequence initialization information, the terminal device determines the DMRS sequence corresponding to the second signal according to the indication information of the DMRS sequence initialization information, and receives the second signal according to the DMRS sequence corresponding to the second signal and the second signaling.

[0083] For example, the first information can include two or more of frequency domain resource information, modulation and coding strategy information, antenna port information, bandwidth part information, DMRS sequence initialization information, a transmission power control command of a scheduled PUCCH, or a PUCCH resource index. For example, when the first information includes at least the frequency domain resource information and the antenna port information, the first indication information includes at least first sub-indication information and second sub-indication information, the first sub-indication information indicates the frequency domain resource information, the second sub-indication information indicates the antenna port information, the terminal device determines the frequency domain resource occupied by the second signal according to the first sub-indication information, and determines the antenna port corresponding to the second signal according to the second sub-indication information, so as to receive the second signal according to the frequency domain resource occupied by the second signal, the antenna port, and the second signaling. When the first information includes at least the frequency domain resource information and the modulation and coding information, the first indication information includes at least first sub-indication information and second sub-indication information, the first sub-indication information indicates the frequency domain resource information, the second sub-indication information indicates the modulation and coding information, the terminal device determines the frequency domain resource occupied by the second signal according to the first sub-indication information, and determines the modulation and coding information corresponding to the second signal according to the second sub-indication information, so as to receive the second signal according to the frequency domain resource occupied by the second signal and the modulation and coding information, and the second signaling. When the first information includes at least the frequency domain resource information, the antenna port information, and the modulation and coding information, the first indication information includes at least first sub-indication information, second sub-indication information, and third sub-indication information, the first sub-indication information indicates the frequency domain resource information, the second sub-indication information indicates the antenna port information, and the third sub-indication information indicates the modulation and coding information, the terminal device determines the frequency domain resource occupied by the second signal according to the first sub-indication information, determines the antenna port corresponding to the second signal according to the second sub-indication information, and determines the modulation and coding information corresponding to the second signal according to the third sub-indication information, so as to receive the second signal according to the frequency domain resource occupied by the second signal, the corresponding antenna port, the corresponding modulation and coding information, and the second signaling.

[0084] It should be noted that the first information includes but is not limited to the above examples. The first information can include one, two or more of frequency domain resource information, modulation and coding strategy information, antenna port information, bandwidth part information, DMRS sequence initialization information, a scheduled PUCCH transmission power control command or a PUCCH resource index, and can also include other resource information for receiving a signal. In addition, the first indication information can include one or more of frequency domain resource information indication information, modulation and coding strategy information indication information, antenna port information indication information, bandwidth part information indication information, DMRS sequence initialization information indication information, a scheduled PUCCH transmission power control command indication information or a PUCCH resource index indication information. The naming of the indication information included in the first indication information is not limited in the present application, as long as it can indicate the corresponding resource information.

[0085] It should be noted that the first signaling includes first indication information of the first information associated with the first signal, and the first signaling is not limited to including only the first indication information. That is, in addition to the first indication information, the first signaling can also include second indication information other than the first indication information. For example, the second indication information can include indication information for indicating a HARQ process, indication information for indicating whether it is a new transmission, indication information for indicating time resources occupied by the first signal, and of course other information. Here, the second indication information is not limited.

[0086] In one example, the first time unit and the second time unit each include one or more slots, mini-slots or symbols. The first time unit and the second time unit do not overlap in time. The first time unit and the second time unit are in the same uplink-downlink switching period. In this way, the phase continuity of the first signal and the second signal can be ensured, so that the terminal device can use the demodulation reference signal corresponding to the first signal to receive the second signal, thereby improving the reception performance of the second signal.

[0087] For example, as shown in Figure 6 One uplink-downlink switching period includes five slots, of which slots 0, 1, 2 and 3 are downlink slots or downlink dominant slots (slots with more downlink symbols than uplink symbols), and slot 4 is an uplink slot. The first time unit is slot 0, and the second time unit can be slot 1, slot 2 or slot 3.

[0088] In one example, the first time unit can include N1 first time slots, and the second time unit can include N2 second time slots, where N1 and N2 are positive integers, the first signal carried in each of the N1 first time slots corresponds to the same HARQ process, while the first signal carried in each of the N1 first time slots corresponds to different transport blocks. In this example, the first signaling includes indication information for indicating the HARQ process of the first signal carried in the N1 first time slots, and the first signaling also includes indication information for indicating whether the signal carried in each of the N1 first time slots is a new transmission, as well as a redundancy version index. Similarly, the second signaling includes indication information for indicating the HARQ process of the second signal carried in the N2 second time slots, and the second signaling can also include indication information for indicating whether the signal carried in each of the N2 second time slots is a new transmission, as well as a redundancy version index.

[0089] For example, in the case of N1 = 2, the first signaling includes one indication information for indicating the HARQ process of the first signal carried in the 2 first time slots, and the indication information can take any value from 0 to M, where M is a positive integer. The first signaling includes two indication information A1 and A2, which are respectively used to indicate whether the signal carried in the 2 first time slots is a new transmission, where A1 is used to indicate whether the signal carried in one of the 2 first time slots is a new transmission, and A2 is used to indicate whether the signal carried in the other of the 2 first time slots is a new transmission. The first signaling can also include two indication information B1 and B2, which are respectively used to indicate the indication information of the redundancy version index corresponding to the signal carried in the 2 first time slots, where B1 is used to indicate the redundancy version index corresponding to the signal carried in one of the 2 first time slots, and B2 is used to indicate the redundancy version index corresponding to the signal carried in the other of the 2 first time slots, where the redundancy version index can take any value from 0 to K, where K is a positive integer.

[0090] In addition, the value of N2 can be equal to N1, or can not be equal to N1, can be greater than N1, or can be less than N1, which is not limited in the present embodiment.

[0091] In one example, the first signaling and the second signaling in the present application can be control signaling, for example, can be physical layer control signaling, media access control (MAC) layer control signaling, or radio resource control (RRC) layer control signaling. In order to better understand the technical solutions of the present application, the following downlink control information (DCI) is taken as an example for description, since the DCI is carried in a physical downlink control channel (PDCCH) and is sent by a network device to a terminal device. The first signaling is Normal-DCI, i.e., the DCI in the prior art. The second signaling is a newly defined mini-DCI in the present application, wherein the mini-DCI does not at least contain a frequency domain resource indication field and / or an antenna port indication field, while the Normal-DCI must contain the frequency domain resource indication field and the antenna port indication field.

[0092] In order to better understand the technical solutions of the present application, the newly defined mini-DCI is described below in combination with the NR protocol, for example, the format of the mini-DCI can be 1_1, and can include one or more of the following fields:

[0093] Bandwidth part indication: used to indicate the bandwidth part index where the PDSCH is located; or

[0094] Frequency domain resource indication: used to indicate the frequency domain resource position occupied by the PDSCH; or

[0095] Modulation and coding strategy: used to indicate the modulation mode and coding rate of the PDSCH; or

[0096] Antenna port: used to indicate the index of the antenna port corresponding to the PDSCH; or

[0097] Demodulation reference signal sequence initial value: used to indicate the initial value of the sequence in the demodulation reference signal corresponding to the PDSCH.

[0098] Further, the mini-DCI can also not include one or more of the following fields:

[0099] - PUCCH transmission power control command, used to indicate the power adjustment of the PUCCH sent by the terminal device; or

[0100] - PUCCH resource indication: used to indicate the resource of the PUCCH sent by the terminal device; or

[0101] - Sounding reference signal (SRS) request: used to indicate the terminal device to send the SRS.

[0102] In one example, the first signal and the second signal in the present application can both be PDSCH. The first PDSCH is scheduled by the Normal-DCI, and the second PDSCH is scheduled by the mini-DCI. Since the Normal-DCI includes the indication information of all the related information of the first PDSCH, the terminal device can receive the first signal only according to the first signaling. Since the mini-DCI does not include the indication information of at least one of the PUCCH transmission power control command, the PUCCH resource indication, and the SRS request, the terminal device needs to determine the information (such as at least one of the PUCCH transmission power control command, the PUCCH resource indication, and the SRS request) not explicitly indicated in the mini-DCI according to the indication information included in the Normal-DCI, and the terminal device can determine the access resource of the second signal according to the indication information of the first information and other information included in the second signaling, and then receive the second signal using the access resource.

[0103] For example, in the case that the mini-DCI does not include the frequency domain resource indication information and the antenna port indication information, the terminal device determines the frequency domain resource occupied by the second signal and the corresponding antenna port number according to the frequency domain resource indication information and the antenna port indication information in the first signaling, and determines other information of the second signal such as the time domain resource occupied by the second signal according to the indication information in the second signaling, so as to receive the second signal.

[0104] It should be noted that the first signal and the second signal in the embodiments of the present application can correspond to the same process, or can correspond to different processes.

[0105] For the terminal device with slowly changing channel, when the terminal device needs to receive the PDSCH in a plurality of continuous time slots, the network device sends the DCI to the terminal in each time slot for scheduling the PDSCH, and the DCI in each time slot carries the frequency domain resource indication field and the antenna port indication field indicating the same content, thereby increasing unnecessary signaling overhead. The technical solution of the present application includes the first indication information of the first information associated with the first signal and the second signal in the first signaling, and the second signaling does not include the indication information of the first information associated with the second signal. Therefore, the overhead of the indication information carried in the second signaling is reduced, and the communication efficiency is improved. Further, for the terminal device with slowly changing channel, the channel quality between the network device and the terminal device in a plurality of continuous time slots is almost unchanged, so that the network device sends signals to the terminal device using the same frequency domain resource, modulation and coding strategy, antenna port, or bandwidth part in the plurality of continuous time slots, which does not have a negative impact on the transmission performance, so that the overhead of the second signaling can be reduced without reducing the communication quality.

[0106] In the embodiments provided above, the methods provided by this application have been described from the perspectives of network devices, terminal devices, and the interaction between network devices and terminal devices. To implement the functions of the methods provided in the embodiments of this application, network devices and terminal devices may include hardware structures and / or software modules, implementing the above functions in the form of hardware structures, software modules, or a combination of hardware structures and software modules. Whether a particular function is implemented in the form of hardware structures, software modules, or a combination of hardware structures and software modules depends on the specific application and design constraints of the technical solution.

[0107] Figure 7 and Figure 8 This is a schematic diagram illustrating the possible structures of communication devices provided in embodiments of this application. These communication devices can implement the functions of the terminal device or network device in the above method embodiments, and therefore can also achieve the beneficial effects of the above method embodiments. In the embodiments of this application, the communication device can be as follows: Figure 1 The terminal device 110 shown can also be as follows: Figure 1 The access network device 120 shown can also be a module (such as a chip) applied to terminal equipment or access network equipment.

[0108] like Figure 7 As shown, the communication device 700 includes a storage module 701 and a transceiver module 702. The communication device 700 can be used to implement the above-mentioned... Figure 5A or Figure 5B The methods illustrated in this embodiment demonstrate the functions of the terminal device or network device.

[0109] When the communication device 700 is used to implement Figure 5A or Figure 5B The terminal device in the method embodiment functions as follows: the storage module 701 is used to store computer programs or instructions. The transceiver module 702 is used to receive a first signaling, which instructs the terminal device to receive a first signal within a first time unit. The first signaling includes first indication information of first information associated with the first signal and a second signal. The terminal device receives the first signal within the first time unit according to the first signaling. It also receives a second signaling, which instructs the terminal device to receive a second signal within a second time unit. The second signaling does not include indication information of the first information associated with the second signal. Finally, the terminal device receives the second signal within the second time unit according to the first indication information and the second signaling. Further, the communication device may also include a processing module 703, used to determine the first information associated with the second signal based on the first indication information; and the transceiver module 702, used to receive the second signal within the second time unit based on the first information and the second signaling.

[0110] When the communication device 700 is used to implement Figure 5A or Figure 5B The network device in the method embodiment functions as follows: the storage module 701 is used to store computer programs or instructions. The transceiver module 702 is used to send a first signaling to the terminal device, the first signaling instructing the terminal device to receive a first signal within a first time unit, the first signaling including first indication information associated with the first signal and a second signal; sending the first signal within the first time unit; sending a second signaling to the terminal device, the second signaling instructing the terminal device to receive a second signal within a second time unit, the second signaling not including the indication information associated with the second signal; and sending the second signal to the terminal device within the second time unit. Further, the communication device also includes a processing module 703, used to determine that the first information associated with the first signal and the second signal is the same.

[0111] For a more detailed description of the storage module 701, transceiver module 702 and processing module 703, please refer to the relevant descriptions in the above method embodiments, which will not be repeated here.

[0112] like Figure 8 As shown, the communication device 800 includes a processor 810 and an interface circuit 820. The processor 810 and the interface circuit 820 are coupled to each other. It is understood that the interface circuit 820 can be a transceiver or an input / output interface. Optionally, the communication device 800 may also include a memory 8030 for storing instructions executed by the processor 810, or storing input data required by the processor 810 to execute instructions, or storing data generated after the processor 810 executes instructions.

[0113] When the aforementioned communication device is a chip applied to a terminal device, the terminal device chip implements the functions of the terminal device in the above method embodiments. The terminal device chip receives information from other modules (such as radio frequency modules or antennas) in the terminal device, which is sent to the terminal device by the network device; or, the terminal device chip sends information to other modules (such as radio frequency modules or antennas) in the terminal device, which is sent to the network device by the terminal device.

[0114] When the aforementioned communication device is a chip applied to a network device, the network device chip implements the functions of the network device in the above method embodiments. The network device chip receives information from other modules (such as radio frequency modules or antennas) in the network device, which is information sent by the terminal device to the network device; or, the network device chip sends information to other modules (such as radio frequency modules or antennas) in the network device, which is information sent by the network device to the terminal device.

[0115] It is appreciated that the processor in the embodiments of the present application can be a central processing unit (CPU), and can also be other general-purpose processors, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic devices, transistor logic devices, a hardware component or any combination thereof. The general-purpose processor can be a microprocessor or any conventional processor.

[0116] The method steps in the embodiments of the present application can be implemented by means of hardware, or by means of a processor executing software instructions. The software instructions can be composed of corresponding software modules, and the software modules can be stored in a random access memory (RAM), a flash memory, a read-only memory (ROM), a programmable ROM (PROM), an erasable PROM (EPROM), an electrically EPROM (EEPROM), a register, a hard disk, a mobile hard disk, a CD-ROM or any other form of storage medium well known in the art. An exemplary storage medium is coupled to the processor, so that the processor can read information from, and write information to, the storage medium. Of course, the storage medium can also be a component of the processor. The processor and the storage medium can be located in an ASIC. In addition, the ASIC can be located in the access network device or the terminal device. Of course, the processor and the storage medium can also exist as discrete components in the access network device or the terminal device.

[0117] In the above embodiments, all or part of the embodiments can be implemented by software, hardware, firmware or any combination thereof. When implemented by software, all or part of the embodiments can be implemented in the form of a computer program product. The computer program product includes one or more computer programs or instructions. When the computer programs or instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of the present application are performed. The computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable devices. The computer programs or instructions can be stored in or transmitted by a computer readable storage medium. The computer readable storage medium can be any available medium accessible by a computer or a data storage device such as a server integrating one or more available media. The available medium can be a magnetic medium, such as a floppy disk, a hard disk, a magnetic tape; an optical medium, such as a DVD; or a semiconductor medium, such as a solid state disk (SSD).

[0118] In various embodiments of the present application, the terms and / or descriptions of different embodiments are consistent and can be referred to each other if there is no special description and logical conflict. The technical features in different embodiments can be combined to form new embodiments according to their inherent logical relationship.

[0119] In the present application, "at least one" means one or more, and "multiple" means two or more. The "and / or" describes the association relationship between the associated objects, which means that there can be three kinds of relationships, for example, A and / or B, which can represent the following three cases: A exists alone, A and B exist together, and B exists alone, where A and B can be singular or plural. In the literal description of the present application, the character " / ", generally represents that the front and rear associated objects are in an "or" relationship; in the formula of the present application, the character " / ", represents that the front and rear associated objects are in a "division" relationship.

[0120] It can be understood that the various numbers involved in the embodiments of the present application are only distinguished for convenience of description, and are not used to limit the scope of the embodiments of the present application. The size of the serial number of the above processes does not mean the execution order, and the execution order of the processes should be determined according to its function and inherent logic.

Claims

1. A communication method applied to a terminal device or a chip in a terminal device, characterized in that, include: The terminal device receives a first signaling instruction, which instructs the terminal device to receive a first signal within a first time unit. The first signaling instruction includes first indication information associated with first information related to the first signal and a second signal. The first information includes at least one of modulation and coding strategy information, antenna port information, or bandwidth portion information. The first signal is received within the first time unit according to the first signaling; The terminal device receives a second signaling instruction, which instructs the terminal device to receive a second signal within a second time unit. The second signaling instruction does not include indication information of the first information associated with the second signal. The second signal is received within the second time unit according to the first instruction information and the second signaling, and the first time unit and the second time unit do not overlap in time.

2. The method according to claim 1, characterized in that, Receiving the second signal within the second time unit according to the first indication information and the second signaling includes: The first information associated with the second signal is determined based on the first indication information; The second signal is received within the second time unit based on the first information and the second signaling.

3. The method according to claim 2, characterized in that, The indication information of the first information includes frequency domain resource indication information and antenna port indication information. The terminal device determines the first information associated with the second signal based on the first indication information, and receives the second signal in the second time unit based on the first information and the second signaling, including: The frequency domain resources occupied by the second signal and the antenna port number corresponding to the frequency domain resources are determined according to the frequency domain resource indication information and the antenna port indication information, respectively. The second signal is received within the second time unit based on the frequency domain resources occupied by the second signal, the antenna port number corresponding to the frequency domain resources, and the second signaling.

4. The method according to any one of claims 1 to 3, characterized in that, The first time unit and the second time unit each include one or more time slots, micro-time slots or symbols.

5. The method according to any one of claims 1 to 3, characterized in that, The first time unit and the second time unit are each a time slot.

6. The method according to any one of claims 1 to 5, characterized in that, The first time unit and the second time unit correspond to the same uplink / downlink switching cycle.

7. A communication method applied to a network device or a chip in a network device, characterized in that, include: Send a first signaling message to a terminal device, the first signaling message being used to instruct the terminal device to receive a first signal within a first time unit, the first signaling message including first indication information associated with a first signal and a second signal; the first information including at least one of modulation and coding strategy information, antenna port information, and bandwidth information; The first signal is transmitted within the first time unit; Send a second signaling message to the terminal device, the second signaling message being used to instruct the terminal device to receive a second signal within a second time unit, the second signaling message not including indication information of the first information associated with the second signal; The second signal is sent to the terminal device in the second time unit, and the first time unit and the second time unit do not overlap in time.

8. The method according to claim 7, characterized in that, Before sending the first signaling to the terminal device, the method further includes: It is determined that the first information associated with the first signal and the second signal is the same.

9. The method according to claim 7 or 8, characterized in that, The first time unit and the second time unit each include one or more time slots, micro-time slots or symbols.

10. The method according to claim 7 or 8, characterized in that, The first time unit and the second time unit are each a time slot.

11. The method according to any one of claims 7 to 10, characterized in that, The first time unit and the second time unit correspond to the same uplink / downlink switching cycle.

12. A communication device, characterized in that, The communication device is a terminal device, or a chip installed in a terminal device. The communication device includes a storage module and a transceiver module, wherein... The storage module is used to store computer programs or instructions; The transceiver module is configured to receive a first signaling, which instructs the transceiver module to receive a first signal within a first time unit. The first signaling includes first indication information associated with the first signal and a second signal. The first information includes at least one of modulation and coding strategy information, antenna port information, or bandwidth portion information. The transceiver module is used to receive the first signal within the first time unit according to the first signaling; The transceiver module is used to receive a second signaling, the second signaling instructing the transceiver module to receive a second signal within a second time unit, the second signaling not including indication information of the first information associated with the second signal; The transceiver module receives the second signal within the second time unit according to the first instruction information and the second signaling, and the first time unit and the second time unit do not overlap in time.

13. The apparatus according to claim 12, characterized in that, The device further includes: The processing module is configured to determine the first information associated with the second signal based on the first indication information; The transceiver module is used to receive the second signal within the second time unit based on the first information and the second signaling.

14. The apparatus according to claim 13, characterized in that, When the indication information of the first information includes frequency domain resource indication information and antenna port indication information, the processing module is specifically used to determine the frequency domain resources occupied by the second signal and the antenna port number corresponding to the frequency domain resources according to the frequency domain resource indication information and the antenna port indication information, respectively. The transceiver module is specifically used to receive the second signal within the second time unit based on the frequency domain resources occupied by the second signal, the antenna port number corresponding to the frequency domain resources, and the second signaling.

15. The apparatus according to any one of claims 12 to 14, characterized in that, The first time unit and the second time unit each include one or more time slots, micro-time slots or symbols.

16. The apparatus according to any one of claims 12 to 14, characterized in that, The first time unit and the second time unit are each a time slot.

17. The apparatus according to any one of claims 12 to 16, characterized in that, The first time unit and the second time unit correspond to the same uplink / downlink switching cycle.

18. A communication device, characterized in that, The communication device is a network device, or a chip installed in a network device. The communication device includes a storage module and a transceiver module. The storage module is used to store computer programs or instructions; The transceiver module is used to send a first signaling to the terminal device. The first signaling is used to instruct the terminal device to receive a first signal within a first time unit. The first signaling includes first indication information associated with the first signal and the second signal. The first information includes at least one of modulation and coding strategy information, antenna port information, and bandwidth information. The transceiver module is used to transmit the first signal within the first time unit; The transceiver module is used to send a second signaling to the terminal device. The second signaling is used to instruct the terminal device to receive a second signal within a second time unit. The second signaling does not include indication information of the first information associated with the second signal. The transceiver module is used to send the second signal to the terminal device in the second time unit, wherein the first time unit and the second time unit do not overlap in time.

19. The apparatus according to claim 18, characterized in that, The device further includes: The processing module is used to determine that the first information associated with the first signal and the second signal is the same.

20. The apparatus according to claim 18 or 19, characterized in that, The first time unit and the second time unit each include one or more time slots, micro-time slots or symbols.

21. The apparatus according to claim 18 or 19, characterized in that, The first time unit and the second time unit are each a time slot.

22. The apparatus according to any one of claims 18 to 21, characterized in that, The first time unit and the second time unit correspond to the same uplink / downlink switching cycle.

23. A communication device, characterized in that, The device includes a processor and an interface circuit, wherein the interface circuit is used to receive signals from other communication devices besides the communication device and transmit them to the processor, or to send signals from the processor to other communication devices besides the communication device, and the processor is used to implement the method as described in any one of claims 1 to 6 or 7 to 11 through logic circuits or execution code instructions.

24. A computer-readable storage medium, characterized in that, The storage medium stores a computer program or instructions, which, when executed by a communication device, implement the method as described in any one of claims 1 to 6 or 7 to 11.

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