Method and apparatus for wireless communication

Abstract

The present application provides a method and apparatus for wireless communication, which helps to improve the gain of uplink channel estimation based on DMRS bundling in the NTN system. The method includes: determining a first time domain window related to DMRS bundling for uplink channel estimation, where the time length of the first time domain window is determined according to first information, and the first information includes one or more of the following information: the determination of the first time interval for the terminal device to perform antenna switching; the time length of the nominal time domain window predefined / preconfigured by the network device; events that cause phase discontinuity and power inconsistency; the maximum duration for the terminal device to maintain phase continuity; the duration of the uplink channel repetition; the duration of the segmented transmission of the uplink channel.

Description

Technical Field

[0001] This application relates to the field of communication technologies, and more specifically, to a method and apparatus for wireless communication. Background Art

[0002] Some communication systems (such as non - terrestrial network (NTN) systems) have the characteristics of large propagation delay and strong device mobility. In such communication systems, when devices perform joint channel estimation based on demodulation reference signal (DMRS) bundling, it may not be possible to ensure phase continuity within a specified time domain window. For example, when a terminal device improves the uplink transmission gain by antenna switching, the antenna switching performed by the terminal device may affect the phase continuity and / or power consistency during DMRS bundling. Summary of the Invention

[0003] This application provides a method and apparatus for wireless communication. The following introduces each aspect related to the embodiments of this application.

[0004] In a first aspect, a method for wireless communication is provided, including: determining a first time domain window related to DMRS bundling for uplink channel estimation, where the time length of the first time domain window is determined according to first information, and the first information includes one or more of the following information: a first time interval for the terminal device to perform antenna switching; the time length of a nominal time domain window predefined / pre - configured by the network device; events that cause phase discontinuity and power inconsistency; the maximum duration for the terminal device to maintain phase continuity; the duration of the uplink channel repetition; the duration of the segmented transmission of the uplink channel.

[0005] In a second aspect, a device for wireless communication is provided. The device is a terminal device or a network device, and the device includes: a determination unit configured to determine a first time domain window related to DMRS bundling for uplink channel estimation, where the time length of the first time domain window is determined according to first information, and the first information includes one or more of the following information: a first time interval for the terminal device to perform antenna switching; the time length of a nominal time domain window predefined / pre - configured by the network device; events that cause phase discontinuity and power inconsistency; the maximum duration for the terminal device to maintain phase continuity; the duration of the uplink channel repetition; the duration of the segmented transmission of the uplink channel.

[0006] In a third aspect, a communication device is provided, including a memory and a processor. The memory is used to store a program, and the processor is used to call the program in the memory to execute the method as described in the first aspect.

[0007] Fourthly, a device is provided, including a processor, which is configured to call a program from a memory to execute the method as described in the first aspect.

[0008] Fifthly, a chip is provided, including a processor, which is configured to call a program from a memory, such that a device installed with the chip executes the method as described in the first aspect.

[0009] Sixthly, a computer-readable storage medium is provided, on which a program is stored, and the program causes a computer to execute the method as described in the first aspect.

[0010] Seventhly, a computer program product is provided, including a program, and the program causes a computer to execute the method as described in the first aspect.

[0011] Eighthly, a computer program is provided, and the computer program causes a computer to execute the method as described in the first aspect.

[0012] In the embodiments of the present application, a terminal device or a network device may determine the time length of a first time domain window related to DMRS bundling according to first information. The first information may include a first time interval for the terminal device to perform antenna switching, thereby avoiding antenna switching from damaging the phase continuity and power consistency during DMRS bundling. It can be seen that determining the time length of the first time domain window according to multiple pieces of information can help improve the gain of uplink channel estimation based on DMRS bundling. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a wireless communication system to which the embodiments of the present application are applied.

[0014] Figure 2 is an NTN system to which the embodiments of the present application are applied.

[0015] Figure 3 is another NTN system to which the embodiments of the present application are applied.

[0016] Figure 4 is a schematic diagram of a time domain window corresponding to DMRS bundling to which the embodiments of the present application are applied.

[0017] Figure 5 is a schematic flowchart of a method for wireless communication provided by the embodiments of the present application.

[0018] Figure 6 is Figure 5 a schematic flowchart of a possible implementation manner of the method shown.

[0019] Figure 7 is a schematic structural diagram of a device for wireless communication provided by the embodiments of the present application.

[0020] Figure 8 It is a schematic structural diagram of a communication device provided by an embodiment of the present application. Detailed implementation manners

[0021] Next, the technical solutions in the embodiments of the present application will be described with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. For the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0022] The embodiments of the present application can be applied to various communication systems. For example: the embodiments of the present application can be applied to a global system of mobile communication (GSM) system, a code division multiple access (CDMA) system, a wideband code division multiple access (WCDMA) system, a general packet radio service (GPRS), a long term evolution (LTE) system, an advanced long term evolution (LTE-A) system, a new radio (NR) system, an evolved system of the NR system, an LTE-based access to unlicensed spectrum (LTE-U) system, an NR-based access to unlicensed spectrum (NR-U) system, an NTN system, a universal mobile telecommunication system (UMTS), a wireless local area network (WLAN), a wireless fidelity (WiFi), a 5th-generation (5G) communication system. The embodiments of the present application can also be applied to other communication systems, such as future communication systems. Such a future communication system can be, for example, a 6th-generation (6G) mobile communication system, or a satellite communication system, etc.

[0023] Traditional communication systems support a limited number of connections and are also easy to implement. However, with the development of communication technologies, communication systems can support not only traditional cellular communications but also one or more other types of communications. For example, a communication system can support one or more of the following communications: device to device (D2D) communication, machine to machine (M2M) communication, machine type communication (MTC), enhanced MTC (eMTC), vehicle to vehicle (V2V) communication, and vehicle to everything (V2X) communication, etc. Embodiments of the present application can also be applied to communication systems that support the above communication methods.

[0024] The communication system in the embodiments of the present application can be applied to a carrier aggregation (CA) scenario, a dual connectivity (DC) scenario, or a standalone (SA) networking scenario.

[0025] The communication system in the embodiments of the present application can be applied to unlicensed spectrum. This unlicensed spectrum can also be considered shared spectrum. Alternatively, the communication system in the embodiments of the present application can also be applied to licensed spectrum. This licensed spectrum can also be considered dedicated spectrum.

[0026] Embodiments of the present application can be applied to terrestrial networks (TN) systems or NTN systems. As an example, the NTN system can include a 4G-based NTN system, an NR-based NTN system, an internet of things (IoT)-based NTN system, and a narrow band internet of things (NB-IoT)-based NTN system.

[0027] A communication system can include one or more terminal devices. The terminal devices mentioned in the embodiments of the present application can also be referred to as user equipment (UE), access terminal, user unit, user station, mobile station, mobile station (MS), mobile terminal (MT), remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent, or user device, etc.

[0028] In some embodiments, the terminal device may be a station (ST) in a WLAN. In some embodiments, the terminal device may be a cellular phone, cordless phone, session initiation protocol (SIP) phone, wireless local loop (WLL) station, personal digital assistant (PDA) device, handheld device with wireless communication function, computing device, or other processing device connected to a wireless modem, in-vehicle device, wearable device, terminal device in a next-generation communication system (such as an NR system), or a terminal device in a future evolved public land mobile network (PLMN) network, etc.

[0029] In some embodiments, the terminal device may be a device that provides voice and / or data connectivity to the user. For example, the terminal device may be a handheld device, in-vehicle device, etc. with wireless connection function. As some specific examples, the terminal device may be a mobile phone, tablet (Pad), laptop, palmtop computer, mobile internet device (MID), wearable device, virtual reality (VR) device, augmented reality (AR) device, wireless terminal in industrial control, wireless terminal in self-driving, wireless terminal in remote medical surgery, wireless terminal in smart grid, wireless terminal in transportation safety, wireless terminal in smart city, wireless terminal in smart home, etc.

[0030] In some embodiments, the terminal device may be deployed on land. For example, the terminal device may be deployed indoors or outdoors. In some embodiments, the terminal device may be deployed on water, such as on a ship. In some embodiments, the terminal device may be deployed in the air, such as on an airplane, balloon, and satellite.

[0031] In addition to the terminal device, the communication system may further include one or more network devices. The network device in the embodiments of the present application may be a device for communicating with the terminal device, and this network device may also be referred to as an access network device or a radio access network device. For example, the network device may be a base station. The network device in the embodiments of the present application may refer to a radio access network (RAN) node (or device) that connects the terminal device to the wireless network. The base station may generally cover various names as follows, or be replaced with the following names, such as: Node B, evolved Node B (eNB), next generation Node B (gNB), relay station, access point, transmitting and receiving point (TRP), transmitting point (TP), master station MeNB, secondary station SeNB, multi-mode radio (MSR) node, home base station, network controller, access node, wireless node, access point (AP), transmission node, transceiver node, base band unit (BBU), remote radio unit (RRU), active antenna unit (AAU), remote radio head (RRH), central unit (CU), distributed unit (DU), positioning node, etc. The base station may be a macro base station, a micro base station, a relay node, a donor node or the like, or a combination thereof. The base station may also refer to a communication module, a modem or a chip disposed in the foregoing device or apparatus. The base station may also be a mobile switching center and a device that undertakes the base station function in D2D, V2X, M2M communications, a network-side device in a 6G network, a device that undertakes the base station function in a future communication system, etc. The base station may support networks with the same or different access technologies. The embodiments of the present application do not limit the specific technologies and specific device forms adopted by the network device.

[0032] The base station may be fixed or mobile. For example, a helicopter or a drone may be configured to act as a mobile base station, and one or more cells may move according to the position of the mobile base station. In other examples, a helicopter or a drone may be configured to be used as a device for communicating with another base station.

[0033] In some deployments, the network device in the embodiments of the present application may refer to a CU or a DU, or the network device includes a CU and a DU. The gNB may further include an AAU.

[0034] By way of example and not limitation, in the embodiments of the present application, the network device may have mobility characteristics. For example, the network device may be a mobile device. In some embodiments of the present application, the network device may be a satellite or a balloon station. In some embodiments of the present application, the network device may also be a base station disposed at locations such as land or water areas.

[0035] In the embodiments of the present application, the network device may provide services for a cell. The terminal device communicates with the network device through the transmission resources used by the cell (for example, frequency domain resources, or in other words, spectrum resources). The cell may be a cell corresponding to the network device (such as a base station). The cell may belong to a macro base station or a base station corresponding to a small cell. Here, the small cell may include: metro cell, micro cell, pico cell, femto cell, etc. These small cells have the characteristics of small coverage range and low transmission power, and are suitable for providing high-rate data transmission services.

[0036] Exemplarily, Figure 1 is a schematic diagram of the architecture of a communication system provided by the embodiments of the present application. As Figure 1 shown, the communication system 100 may include a network device 110. The network device 110 may be a device that communicates with a terminal device 120 (or referred to as a communication terminal, terminal). The network device 110 may provide communication coverage for a specific geographical area and may communicate with terminal devices located within the coverage area.

[0037] Figure 1 Exemplarily, one network device and two terminal devices are shown. In some embodiments of the present application, the communication system 100 may include multiple network devices and the coverage range of each network device may include other numbers of terminal devices. The embodiments of the present application do not limit this.

[0038] Exemplarily, Figure 2 and Figure 3 are two schematic diagrams of the architectures of the NTN system mentioned above. Figure 2 The NTN system 200 shown uses a satellite 210 as an aerial platform. As Figure 2 shown, the satellite radio access network corresponding to the NTN system 200 includes a satellite 210, a service link 220, a feeder link 230, a terminal device 240, a gateway (GW) 250, and a network 260 including a base station and a core network.

[0039] The satellite 210 is a space-based spacecraft. The service link 220 refers to the link between the satellite 210 and the terminal device 240. The feeder link 230 refers to the link between the gateway 250 and the satellite 210. The earth-based gateway 250 connects the satellite 210 to the base station or the core network, depending on the architecture selection.

[0040] Figure 2 The shown NTN architecture is a bent-pipe transponder architecture. In this architecture, the base station is located on the earth behind the gateway 250, and the satellite 210 acts as a relay. The satellite 210 operates as a repeater to forward the feeder link 230 signals to the service link 220, or forward the service link 220 signals to the feeder link 230. That is to say, the satellite 210 does not have the function of a base station, and the communication between the terminal device 240 and the base station in the network 260 needs to be relayed by the satellite 210.

[0041] Figure 3 The shown NTN system 300 also uses the satellite 310 as an aerial platform, and this aerial platform carries the base station 312. As Figure 3 shown, the satellite radio access network corresponding to the NTN system 300 includes the satellite 310, the service link 320, the feeder link 330, the terminal device 340, the gateway 350, and the network 360. Different from Figure 2 that, there is a base station 312 on the satellite 310, and the network 360 behind the gateway 350 only includes the core network.

[0042] Figure 3 The shown NTN architecture is a regenerative transponder architecture. In this architecture, the satellite 310 carries the base station 312 and can be directly connected to the earth-based core network through a link. The satellite 310 has the function of a base station, and the terminal device 340 can communicate directly with the satellite 310. Therefore, the satellite 310 can be called a network device.

[0043] In Figure 2 and Figure 3 the communication systems of the shown architectures, multiple network devices can be included, and the coverage range of each network device can include other numbers of terminal devices, which are not limited in the embodiments of this application.

[0044] In the embodiments of this application, Figures 1 to 3 the shown communication system may also include other network entities such as a mobility management entity (MME) and an access and mobility management function (AMF), which are not limited in the embodiments of this application.

[0045] It should be understood that in the embodiments of the present application, a device with communication functions in a network / system can be referred to as a communication device. Taking Figure 1 the shown communication system 100 as an example, the communication device may include a network device 110 and a terminal device 120 with communication functions. The network device 110 and the terminal device 120 can be the specific devices described above, which will not be elaborated here; the communication device may also include other devices in the communication system 100, such as other network entities like a network controller, a mobility management entity, etc., which are not limited in the embodiments of the present application.

[0046] For the convenience of understanding, some related technical knowledge involved in the embodiments of the present application will be introduced first. The following related technologies can be arbitrarily combined with the technical solutions of the embodiments of the present application as optional solutions, and all of them fall within the protection scope of the embodiments of the present application. The embodiments of the present application include at least part of the following contents.

[0047] In R17, in order to achieve coverage enhancement, joint channel estimation across multiple consecutive time slots is introduced. Joint channel estimation can jointly utilize the DMRS of multiple consecutive time slots for channel estimation together to improve the accuracy of channel estimation, thereby effectively improving the coverage performance of the corresponding channel. For example, for a terminal device at the cell edge, the channel state between it and the network device is often poor and the signal-to-interference-plus-noise ratio level on the terminal device side is low. The network device adopting joint channel estimation can improve the accuracy of uplink channel estimation, improve the demodulation performance of the received signal, and thus improve the corresponding channel coverage.

[0048] In joint channel estimation, the network device instructs the terminal device to perform DMRS bundling during the uplink transmission by configuring relevant signaling. DMRS bundling can also be called DMRS binding. The main limitation of DMRS bundling is to maintain power consistency and phase continuity. That is to say, the joint channel estimation introduced in R17 is based on the condition of maintaining power consistency and phase continuity.

[0049] Taking phase continuity as an example, the relevant specifications define the phase continuity requirements that need to be met during the DMRS bundling duration. For example, in the requirements of Technical Specification TS 38.101-1[3], for the frequency division duplexing (FDD) band and the DMRS bundling configuration supporting 16 time slots, the maximum allowable phase difference between time slot 0 and any time slot "p" applying DMRS bundling is only 30 degrees. Another example is that for the FDD band and the DMRS bundling configuration supporting less than or equal to 8 time slots, the maximum allowable phase difference between any two consecutive time slots (for example, time slots "p - 1" and "p") applying DMRS bundling cannot exceed 25 degrees.

[0050] To specify the duration of channel binding, a configured time domain window (C-TDW) and an actual time domain window (A-TDW) are introduced in joint channel estimation. C-TDW can also be referred to as the nominal TDW or the nominal TDW. Generally, the duration of the TDW can be represented by the number of consecutive time slots. Except for the last C-TDW, the duration of each C-TDW can be given by higher layer configuration.

[0051] C-TDW usually consists of one or more A-TDWs. The terminal device can determine the A-TDW for DMRS bundling according to the C-TDW configured by the base station according to certain principles. For example, the first A-TDW starts at the first symbol of the channel transmission and ends before the "event" occurs. The "event" refers to an event that may cause the power consistency or phase continuity to be violated. For example, the terminal device is allowed to update the common timing advance (TA) and the terminal device specific TA between the A-TDWs in each DMRS bundling window or the "event" occurs. The A-TDW update will also be defined as an event that causes the power consistency and phase continuity to not be maintained. After the event occurs, the terminal device can decide whether to start a new A-TDW according to the configuration, the type of event, and its own capabilities. The A-TDW will also terminate at the end of the channel transmission.

[0052] Taking the transmission of the physical uplink shared channel (PUSCH) as an example, the terminal device will define the C-TDW and the A-TDW when performing PUSCH transmission. Among them, the C-TDW contains one or more consecutive time slots, and one or more C-TDWs jointly cover all PUSCH repeated transmissions in the time domain. Further, within each C-TDW, one or more A-TDWs can be implicitly determined, and the PUSCH transmission for which joint channel estimation can be actually performed is determined by the A-TDW. During PUSCH transmission, there is usually a TA or an "event" occurring in the A-TDW interval of the DMRS bundling time. That is to say, the network device expects the terminal device to maintain power consistency and phase continuity within each A-TDW.

[0053] For ease of understanding, the following combines Figure 4 , and takes the DMRS bundling time domain window corresponding to PUSCH repeated transmission as an example for detailed description.

[0054] See Figure 4, the time domain window of the DMRS bundling includes 16 time slots. Among them, the number of repeated transmissions of PUSCH is 16 times, and the length of C-TDW is configured to be 4 time slots. That is to say, all the repeated transmissions of PUSCH are covered by 4 C-TDWs within this time domain window.

[0055] Continue to refer to Figure 4 , both the start and end time slots of A-TDW are related to C-TDW and the event. As Figure 4 shown, A-TDW does not cover the repeated transmissions corresponding to the event. The start time slot of A-TDW may be the start time slot of each C-TDW or the next time slot of the event. The end time slot of A-TDW may be the end time slot of each C-TDW or the time slot before the event occurs. Therefore, within one C-TDW, A-TDW will be generated only after the event ends.

[0056] As described above in combination with Figure 4 the DMRS bundling for joint channel estimation is introduced. The current DMRS bundling standard is specified based on the TN system. Since the round-trip delay variation in the TN system is very low, when the terminal device does not perform autonomous TA adjustment during A-TDW, the phase can maintain the continuity required by the specification. However, for communication systems with strong mobility such as NTN mentioned above, due to network characteristics such as large propagation delay and device movement, it will be impossible to ensure meeting the phase continuity requirements based on DMRS bundling in the above specification. For example, since the satellite moves very fast and significantly changes the round-trip delay, this will cause phase discontinuity and time asynchronization.

[0057] In some communication systems (for example, the NR system), the network device can also utilize channel reciprocity to obtain downlink channel information. Exemplarily, the network device can determine the downlink channel information by measuring the sounding reference signal (SRS). For example, the base station side can utilize channel reciprocity to obtain the downlink channel information by measuring SRS.

[0058] Channel reciprocity can also be referred to as coherent reciprocity. During the coherence time, the channel fading experienced by the uplink (UL) and downlink channels is basically the same. The current requirements for coherent uplink multiple-input multiple-output (MIMO) are based on a 20-ms time window. Among them, the consistency requirement for related UL-MIMO is: within the specified 20-ms time window, starting from the last transmitted sounding reference signal (SRS) on the same antenna port, the maximum allowable difference in the relative power and phase error measured between different antenna ports. Therefore, this time window needs to ensure the measurement window size for the maximum allowable difference in relative power and phase error. In the NTN system, there is a large round trip time (RTT) delay, that is, round trip delay (RTD), between the terminal device and the satellite. This time window needs to be extended to adapt to the large RTD, so as to ensure the usefulness of the precoding sent by the network device. That is to say, in a system with a large RTT delay, in order to ensure the usefulness of precoding, the coherence time window needs to be extended to adapt to the large RTD of the NTN system.

[0059] In the NR system, 64 SRS bandwidth configuration methods are supported. The minimum bandwidth configurable for an SRS resource is 4 resource blocks (RBs), and the maximum bandwidth is 272 RBs. An SRS resource can include 1, 2, or 4 antenna ports, which are configured by the network device according to the capabilities of the terminal device.

[0060] NR also supports 4 types of SRS with different functions. The SRSs with different functions are managed and configured in the form of SRS resource sets. In some scenarios, for different SRS uses, the network device can configure different SRS resource sets for the terminal device. The network device can also indicate the use of the SRS resource set through higher-layer signaling. For example, the SRS resource set can be used for antenna switching. For example, the network device can configure multiple SRS resource sets for the UE, and each resource set is configured with its function by higher-layer signaling.

[0061] Antenna switching can support terminal devices with different antenna transceiver capabilities to apply channel reciprocity to the uplink and downlink channels. Limited by cost and hardware, the number of antennas that a terminal device can transmit simultaneously may be less than the number of receiving antennas, resulting in different terminal devices having different antenna transceiver capabilities. Among them, the number of antennas transmitted by the terminal device is less than or equal to the number of antennas transmitted by the network device. Exemplarily, the antenna transceiver capabilities of the terminal device can include: the number of transmit antennas is the same as the number of receive antennas (i.e., T = R), the number of transmit antennas is 1 and the number of receive antennas is 2 (i.e., 1T2R), the number of transmit antennas is 1 and the number of receive antennas is 4 (i.e., 1T4R), and the number of transmit antennas is 2 and the number of receive antennas is 4 (i.e., 2T4R).

[0062] For a terminal device with fewer transmit antennas than receive antennas, in order for the network device to obtain complete downlink channel state information, SRS can be transmitted using different antennas at different times through antenna switching. That is to say, in order to support terminal devices with fewer transmit antennas than receive antennas to provide downlink channel information to the network device through channel reciprocity, the NR system supports terminal devices to transmit SRS in the form of antenna switching. Further, when the terminal device applies channel reciprocity through antenna switching, the gain of channel estimation based on DMRS bundling can also be improved.

[0063] In some embodiments, the terminal device can transmit SRS according to the configuration information of SRS antenna switching. Among them, the configuration information of SRS antenna switching includes at least one of the following: the number of transmit antennas and the number of receive antennas information, SRS resource set information, SRS resource information, SRS port information, and transmission layer information.

[0064] The above describes the method by which the terminal device transmits SRS based on antenna switching. For the NTN system, the terminal device can improve the gain of uplink transmission and channel estimation through spatial diversity methods such as antenna switching. For example, the NTN system can support antenna switching when the signal quality corresponding to the current antenna is poor to improve the gain of uplink transmission. Another example is that the NTN system can support SRS antenna switching of the terminal device, that is, the terminal device transmits SRS using different antennas at different times according to predefined rules, so that the network device can obtain complete downlink channel state information. Another example is that the NTN system can support the terminal device to perform antenna switching when transmitting PUSCH based on DMRS binding to improve the gain of channel estimation after DMRS channel bundling.

[0065] However, in the case of channel estimation based on DMRS bundling in the NTN system, the antenna switching of the terminal device may affect the phase continuity and / or power consistency during DMRS bundling.

[0066] The above text introduced the impact of antenna switching performed by the terminal device on the joint channel estimation based on DMRS bundling in the NTN system. There are also various problems in the NTN system that may affect channel estimation. For example, in the NTN system, the ability of the terminal device to maintain phase continuity is affected by problems such as large propagation delays and strong mobility. Another example is that the duration of the segmented transmission of the uplink channel in the NTN system is also affected.

[0067] It should be noted that the problem mentioned above in the NTN system that affects the phase continuity and / or power consistency during DMRS bundling due to large propagation delays and strong device mobility is only an example. The embodiments of the present application can be applied to any type of communication scenario for channel estimation based on DMRS bundling in a communication system with large propagation delays and strong device mobility.

[0068] To solve the above problems, the embodiments of the present application propose a method for wireless communication. Through this method, the terminal device or the network device can determine the time length of the first time domain window corresponding to the DMRS bundling based on various information such as the first time interval of antenna switching, thereby improving the gain of uplink channel estimation based on DMRS bundling. The following combines Figure 5 to describe in detail a method embodiment of the embodiments of the present application. For ease of understanding, the following combines Figure 5 to explain in detail the method proposed in the embodiments of the present application.

[0069] Referring to Figure 5 , in step S510, determine the first time domain window related to the DMRS bundling for uplink channel estimation.

[0070] The communication device that determines the first time domain window can be any one of the terminal devices described above, or any one of the network devices described above, which is not limited herein.

[0071] The terminal device can be a terminal device that communicates with any one of the network devices. In some embodiments, the terminal device can be a device in the NTN system that communicates with the aerial platform through the service link, or a gateway that communicates with the aerial platform through the feeder link. The aerial platform is, for example, a satellite, or, for example, a drone system.

[0072] In some embodiments, the terminal device can be a communication device with different capabilities. Exemplarily, the terminal device can be a device that meets the R18 capability requirements. Exemplarily, the terminal device can have the ability to support antenna switching. For example, when the number of transmitting antennas of the terminal device is less than the number of receiving antennas, the terminal device can perform uplink transmission on different antenna ports through antenna switching. Exemplarily, the terminal device can have different antenna transceiver capabilities.

[0073] A network device can be a communication device that provides network services to any type of terminal device. In some embodiments, the network device communicating with the terminal device can be a base station carried by a satellite in an NTN system. In some embodiments, the network device can be a satellite with different orbital altitudes in an NTN system. For example, the network device can be a low earth orbit (LEO) satellite, a medium earth orbit (MEO) satellite, a geostationary earth orbit (GEO) satellite, or a high elliptical orbit (HEO) satellite, etc. When the orbital altitude of the LEO satellite is 1200 km, it can be represented by LEO-1200.

[0074] Wireless communication of different service types can be carried out between the terminal device and the network device. The service type includes voice over internet protocol (VoIP) service. For example, the terminal device and the network device can transmit VoIP data packets.

[0075] The terminal device or the network device determines a first time domain window, which means that the terminal device or the network device determines a first time domain window related to DMRS bundling. That is to say, the first time domain window is the time domain window for the terminal device to send the uplink channel based on DMRS bundling. This DMRS bundling helps the communication device estimate the uplink channel. For example, when the terminal device determines a first time domain window related to DMRS bundling, it can facilitate the terminal device to send an uplink channel for the network device to perform channel estimation within the first time domain window. Another example is that when the network device determines a first time domain window related to DMRS bundling, it can indicate the first time domain window for the terminal device to send the uplink channel and perform channel estimation based on the uplink channel corresponding to this time domain window. Another example is that based on channel reciprocity, the network device indicating the first time domain window to the terminal device can facilitate the network device to obtain downlink channel information through the uplink channel sent by the terminal device.

[0076] The uplink channel corresponding to the DMRS bundling can be the PUSCH sent by the terminal device or the physical uplink control channel (PUCCH), which is not limited here.

[0077] The first time domain window is related to the DMRS bundling for uplink channel estimation, which means that the first time domain window is the time domain window during the DMRS bundling. This DMRS bundling is used for joint channel estimation to enhance uplink coverage. The first time domain window can be the A-TDW during the DMRS bundling, or the time domain window when the terminal device transmits the uplink channel in segments during the DMRS bundling.

[0078] In some embodiments, the first time domain window is the A-TDW related to the DMRS bundling. During the time period corresponding to the A-TDW, the terminal device can maintain phase continuity and / or power consistency. The terminal device or the network device can determine the first time domain window according to the continuity requirements of the A-TDW. By maintaining phase continuity and power consistency during the duration of the A-TDW, the terminal device allows the receiver to perform joint channel estimation across multiple time slots.

[0079] As a possible implementation, the DMRS bundling period may include one or more A-TDWs. The A-TDW related to the DMRS bundling can be this one A-TDW, or any one of the multiple A-TDWs.

[0080] In some embodiments, the first time domain window is the time period corresponding to the segmented transmission of the uplink channel. Specifically, when the terminal device performs segmented transmission during the DMRS bundling, each continuous transmission time period is the first time domain window.

[0081] As a possible implementation, the DMRS bundling period may include one or more time periods of segmented transmission. The segmented transmission related to this DMRS bundling can be this one segment, or any one of the multiple segments.

[0082] The terminal device or the network device determines the first time domain window, including determining the time length of the first time domain window. The time length of the first time domain window can be determined according to the first information. The first information may include one or more of the following information: the first time interval for the terminal device to perform antenna switching; the time length of the C-TDW predefined / preconfigured by the network device; events that cause phase discontinuity and power inconsistency; the maximum duration for the terminal device to maintain phase continuity; the duration of the uplink channel repetition; the duration of the segmented transmission of the uplink channel.

[0083] In some embodiments, the first information for determining the time length of the first time domain window may include two or more of the above-mentioned information. Among them, the multiple information may be determined mutually or included mutually. For example, the time length of the pre-defined / pre-configured C-TDW by the network device may determine the duration of the uplink channel segmented transmission. For another example, the antenna switching performed by the terminal device may be one of multiple events that cause phase discontinuity and power inconsistency. Therefore, when the first time domain window is the A-TDW, the time length of the A-TDW may be determined according to the time length of the C-TDW and the first time interval of the antenna switching.

[0084] In some embodiments, the first information includes the first time interval of the antenna switching performed by the terminal device. That is to say, the time length of the first time domain window is determined according to the first time interval. Exemplarily, when the first time domain window is the time period of the uplink channel segmented transmission, the boundary of each segment may be determined according to the first time interval. Exemplarily, when the first time domain window is the A-TDW, the boundary of the A-TDW may be determined according to the first time interval.

[0085] As a possible implementation manner, when the first information includes the first time interval, it may further include one or more of the above-mentioned multiple information. For example, when the first time domain window is the A-TDW, the time length of the first time domain window may be jointly determined according to the first time interval, the time length of the C-TDW, and the event that disrupts the continuity.

[0086] Hereinafter, taking the A-TDW as an example, a method for determining the time length of the first time domain window according to the first time interval will be specifically described. It should be noted that when the first time domain window is other time periods, the time length of this time period may also be determined with reference to the determination method of the A-TDW time length, which will not be elaborated here.

[0087] That the A-TDW is determined according to the first time interval of the antenna switching performed by the terminal device means that the time length of the A-TDW may be determined according to the time interval of the antenna switching performed by the terminal device. That is to say, the size of the A-TDW may be determined according to the first time interval corresponding to the antenna switching of the terminal device.

[0088] The terminal device or the network device determines the A-TDW corresponding to the DMRS bundling based on the time interval of the antenna switching, which helps to improve the gain of the communication device for channel estimation and uplink transmission when the antenna switching and the DMRS bundling are jointly executed. In some embodiments, after the terminal device enables the antenna switching, the antenna switching may occur multiple times in the middle of the repeated transmission of the uplink channel (such as PUSCH). The phase continuity of the uplink transmission will be interrupted at the antenna switching point. Therefore, the antenna switching will limit the length of the A-TDW. That is to say, the antenna switching cannot be performed within the DMRS bundling, otherwise the phase continuity and power consistency cannot be guaranteed within the DMRS bundle.

[0089] In some embodiments, in order to effectively use antenna switching for spatial diversity in an NTN system, for UL transmissions with DMRS bundling, antenna switching can be performed at the boundary of two bundling windows. This boundary is related to the first time interval. For example, when the DMRS binding corresponds to an A-TDW, the execution time of antenna switching can be the boundary time of this A-TDW.

[0090] As can be seen from the foregoing, when the number of transmit antennas of the terminal device is less than the number of receive antennas, the terminal device can transmit uplink data on different antenna ports through antenna switching. As a possible implementation, when the signal quality of a certain antenna port does not meet the requirements, the terminal device can ensure the uplink coverage performance through antenna switching. That is to say, the timing of antenna switching can be related to the signal quality corresponding to the transmit antenna.

[0091] As a possible implementation, the timing of antenna switching can be determined by the signal quality corresponding to the antenna currently transmitting the uplink channel. That is to say, when the antenna currently transmitting the uplink channel is the first antenna, the signal quality corresponding to the first antenna can be used to determine the timing of antenna switching. For example, when the signal quality corresponding to the first antenna meets the requirements, the terminal device can refrain from performing antenna switching. Another example is that when the signal quality corresponding to the first antenna does not meet the requirements, the terminal device switches the first antenna transmitting the uplink channel to the second antenna.

[0092] As a possible implementation, the signal quality for determining the timing of antenna switching can be expressed by the signal-to-noise ratio (SNR), or by the reference signal received power (RSRP), or by the reference signal received quality (RSRQ).

[0093] As another possible implementation, whether the signal quality meets the requirements can be determined by a set threshold. For example, if the signal quality is greater than or equal to the first threshold, the terminal device can refrain from performing antenna switching. Conversely, if the signal quality corresponding to the first antenna is less than the first threshold, the terminal device switches the first antenna transmitting the uplink channel to the second antenna.

[0094] Taking SNR as an example, the first threshold is set to SNR target . If the signal quality of the first antenna is SNR1 < SNR target , then antenna switching is indicated. Similarly, if the signal quality of the second antenna is SNR2 < SNR target, it indicates antenna switching. After the antenna switching, the mean signal quality SNR of the first antenna and the second antenna av satisfies the following conditions:

[0095] SNR av = 2 CAP - 1;

[0096] where CAP = [log2(1 + SNR1)+log2(1 + SNR2)] / 2.

[0097] In some embodiments, it takes a certain amount of time for the terminal device to perform antenna port switching. Further, during the process of the terminal device performing antenna port switching, no uplink information can be sent. As a possible implementation, the terminal device can configure a guard interval for antenna switching to ensure the antenna port switching process. For example, the terminal device can prepare the relevant configurations for antenna switching within this guard interval.

[0098] As a possible implementation, the guard interval for antenna switching can be represented by a time length or by the number of time units. The time unit can be a time slot or a symbol, which is not limited here. Exemplarily, the terminal device can configure a guard interval K for antenna switching, and the guard interval K can be set to 1, 2, 3,..., N symbol lengths. Exemplarily, the length of the guard interval can be represented by X milliseconds.

[0099] In some embodiments, the time for the terminal device to complete antenna switching can include this guard interval or can be only the time period for the terminal device to perform antenna switching. If the guard interval is included, the time for the terminal device to complete antenna switching refers to the time period for the terminal device to perform antenna switching and the guard intervals before and after.

[0100] In some embodiments, the time for the terminal device to complete antenna switching can be represented by a time length or by the number of time units. The time length can be a time period represented by various time units such as milliseconds. The time unit can be a time slot or a symbol, which is not limited here. Exemplarily, the time for the terminal device to complete antenna switching can be represented by the number of time slots. For different subcarrier intervals, the time slot length will be different. For example, defining the time length for the antenna to complete antenna switching as T1, and T1 includes the guard interval for antenna switching, the time T for the terminal device to complete antenna switching can also be represented as:

[0101]

[0102] where Denote floor function, γ is a rational number representing the adjustment factor, and T_slot represents the time length of a time slot. The above formula indicates that the terminal device needs T time slots to complete the handover.

[0103] In some embodiments, the configuration information for the terminal device to perform antenna handover can be predefined or configured by the network device. For example, the network device can send the configuration information for antenna handover to the terminal device through radio resource control (RRC) signaling, downlink control information (DCI), or medium access control (MAC) signaling (such as a MAC control element (CE)).

[0104] The first time interval for the terminal device to perform antenna handover can be a time period determined based on two adjacent antenna handovers. In some embodiments, the first time interval can refer to the time period between the time point when the terminal device completes the Nth antenna handover and the time point when the (N + 1)th antenna handover is triggered. In some embodiments, the first time interval can refer to the time period between the time point when the terminal device completes the Nth antenna handover and the time point when the (N + 1)th antenna handover is completed. In some embodiments, the first time interval can refer to the time period between the time point when the terminal device triggers the Nth antenna handover and the time point when the (N + 1)th antenna handover is triggered.

[0105] In some embodiments, the first time interval for the terminal device to perform antenna handover can be related to the timing of the antenna handover described above, or can be related to the antenna handover interval supported by the terminal device.

[0106] As a possible implementation, the first time interval for the terminal device to perform antenna handover can be determined based on the timing of the antenna handover. Exemplarily, the terminal device can determine the end time point of the first time interval based on the signal quality of the antenna port. For example, during the transmission of the uplink channel, if the signal quality of the antenna port for transmitting the uplink channel is less than a set threshold, the antenna handover is triggered. As known from the above, the end time point of the first time interval is the time point when the antenna handover is triggered.

[0107] As another possible implementation, the first time interval for the terminal device to perform antenna handover can be related to the length of the antenna handover interval supported by the terminal device. Exemplarily, the first time interval can be equal to the length of the antenna handover interval supported by the terminal device, or can be less than the antenna handover interval supported by the terminal device.

[0108] Exemplarily, the antenna switching interval supported by the terminal device may be related to the capabilities of the terminal device or the communication environment between the terminal device and the network device. For example, the terminal device may determine the length of the supported antenna switching interval based on its ability to maintain phase continuity and power consistency.

[0109] In some embodiments, the first time interval for the terminal device to perform antenna switching may be autonomously determined by the terminal device. For example, the terminal device may determine the first time interval according to the length of the antenna switching interval it supports. Another example is that since the total budget for a single VoIP data packet is 20 ms, the terminal device may set the interval for antenna switching to a specific time length. This time length may be, for example, 1, 2, 4, 8, 10, or 12 ms.

[0110] Determined according to the first time interval for the terminal device to perform antenna switching, it means that the antenna switching performed by the terminal device can be regarded as an event that interrupts phase continuity and / or power consistency. Since the terminal device does not transmit uplink data during antenna switching, the antenna switching can be regarded as a new event that disrupts phase continuity and / or power consistency. Therefore, the antenna switching needs to be one of the factors for determining the duration of A-TDW. For the DMRS binding with antenna switching enabled, the corresponding A-TDW can be determined by the first time interval for the terminal device to perform antenna switching to ensure that the phase continuity meets the continuity requirements in relevant technical specifications (e.g., Clause 6.4.2.5 in TS 38.101-1). In this case, the antenna switching of the terminal device and the DMRS binding for joint channel estimation are jointly performed on the uplink channel (e.g., PUSCH) transmission, thereby improving the gain of channel estimation while utilizing more spatial diversity.

[0111] Exemplarily, to meet the requirements of LEO-1200PUSCH for VoIP, the antenna switching should be considered together with the DMRS binding. A smaller antenna switching interval can utilize more spatial diversity within the 20-ms VoIP transmission time budget, while a larger A-TDW can provide more channel estimation gain.

[0112] When the size of the first time domain window related to the DMRS bundling is determined according to the first time interval of the antenna switching, it is convenient to jointly execute the DMRS bundling mechanism and the antenna switching mechanism during the transmission of the uplink channel. When the DMRS binding and the antenna switching are used jointly, the first time domain window is determined according to the first time interval, which can improve the spatial diversity gain based on the antenna switching while ensuring the channel estimation gain based on the DMRS bundling.

[0113] The terminal device or the network device can determine the A-TDW according to the first time interval in various ways. For example, the terminal device can determine the A-TDW through information interaction with the network device.

[0114] In some embodiments, the terminal device can send the first time interval to the network device. The network device can determine the A-TDW according to the first time interval. The network device can send the configuration information of the A-TDW to the terminal device. The configuration information of the A-TDW can include the time length of the A-TDW and can also include the configuration parameters of the A-TDW.

[0115] Exemplarily, when the terminal device autonomously determines the switching interval of the antenna, the network device may not know the antenna switching interval executed by the terminal device. Therefore, the terminal device needs to report auxiliary information, which can indicate the first time interval. For example, the terminal device can report the autonomously determined first time interval to facilitate the network device to determine the size of the A-TDW for DMRS binding, thereby ensuring the performance of the system uplink coverage. After determining the A-TDW according to the first time interval, the network device notifies the terminal device. Another example is that the terminal device can report the length of the antenna switching interval it supports to the network device to let the network device determine the size of the A-TDW for DMRS binding. The network device can feedback the size of the A-TDW to the terminal device through RRC dedicated signaling or terminal device capability reporting.

[0116] For ease of understanding, the following introduces a possible implementation manner for the terminal device to determine the A-TDW in combination with Figure 6 the flow schematic diagram shown. Figure 6 It is written from the perspective of the interaction between the terminal device and the network device.

[0117] Refer to Figure 6 , in step S610, the terminal device sends the first time interval to the network device. In the case where the terminal device autonomously determines the first time interval, the network device does not determine this first time interval. The terminal device can send the first time interval to the network device, and this first time interval can be used for the network device to determine the size of the A-TDW.

[0118] In step S620, the network device sends the configuration information of the A-TDW to the terminal device.

[0119] Previously, in combination with Figure 5 and Figure 6 it was introduced that when the first information includes the first time interval for the terminal device to perform antenna switching, the method for the terminal device or the network device to determine the time length of the first time domain window based on the first time interval. As can be seen from the foregoing, the first information can also include various other information.

[0120] In some embodiments, the first information may include configuration information related to DMRS bundling. The configuration information related to DMRS bundling can be used to determine the time length of the first time domain window. For example, when the first time domain window is A-TDW, the terminal device can determine A-TDW based on this configuration information and the first time interval. Further, the terminal device can notify the network device of the duration of this A-TDW through dedicated signaling.

[0121] As a possible implementation, the configuration information related to DMRS bundling may include C-TDW related to DMRS bundling. That is to say, the first information may include the time length of the nominal time domain window predefined / preconfigured by the network device. The nominal time domain window is C-TDW. The network device can set the size of C-TDW. Exemplarily, the network device can configure C-TDW based on the report of the terminal device. This report can consider requirements such as phase difference limitation, timing, and frequency error. This report also includes the capabilities of the terminal device. That is to say, the size of C-TDW can depend on the capabilities of the terminal device. Exemplarily, when PUSCH is repetitively transmitted, the length of C-TDW can be configured by the RRC signaling of the network device. For example, for a terminal device using the PUSCH-TimeDomainWindowLength-r18 information element (IE), the network device can configure it through specific RRC signaling. This specific RRC signaling can configure C-TDW to any value from 1 time slot to 32 time slots. Exemplarily, C-TDW can be determined according to the duration of the uplink channel segmented transmission, which will be described in combination with the determination method of A-TDW later.

[0122] Exemplarily, the time length of C-TDW can be carried in one or more of the following information: broadcast message, RRC message, and DCI. Specifically, the network device can send C-TDW through a broadcast message or an RRC message or DCI or a combination of multiple messages. Among them, DCI can send C-TDW through dynamic indication.

[0123] Exemplarily, C-TDW can be the same for all terminal devices or different.

[0124] Exemplarily, the network device can determine C-TDW according to the service type. That is to say, C-TDW can be related to the service type corresponding to the uplink channel. Exemplarily, C-TDW can be determined according to the quality of service (QoS) of the service. Different services can have different C-TDW sizes. For example, for VoIP services, C-TDW can be set not to exceed 10 ms.

[0125] As a possible implementation, when the network device is a satellite in the NTN system, the configuration information related to DMRS bundling may include the time domain window related to DMRS bundling. The time domain window related to DMRS may include C-TDW or the A-TDW determined by the satellite. In this case, the time length of the time domain window may be determined according to one or more of the following information: the relative position between the satellite and the terminal device; the timing drift corresponding to the satellite.

[0126] Exemplarily, the network device may configure the C-TDW length as the current timing drift derived from the satellite ephemeris. By configuring the C-TDW as the timing drift, it is convenient for the terminal device to update the time / frequency pre-compensation frequently enough. The magnitude of the timing drift is largely affected by the elevation angle between the satellite and the terminal device. Taking LEO-1200km as an example, assuming the terminal device is fixed, when the satellite moves away from the terminal device at an elevation angle of 30 degrees, the timing drift of the round-trip delay is about 70.5 μs / s; when the satellite moves away from the terminal device at an elevation angle of 60 degrees, the timing drift of the round-trip delay is 42.59 μs / s; when the elevation angle is approximately 90 degrees, the timing drift becomes 0.36 μs / s.

[0127] Exemplarily, the network device may configure the C-TDW based on the necessary TA pre-compensation update period at the lowest satellite elevation angle in the orbit to allow the terminal device to update the TA pre-compensation with a sufficient update period to meet the timing requirements. The network device may update the C-TDW through RRC reconfiguration according to the satellite position and adjust the C-TDW according to the satellite movement. When the network device does not know the position of the terminal device, it is necessary for the network device to estimate the necessary TA pre-compensation update period. For example, the network device may estimate the update period using the satellite position and beam direction and then configure the TDW. The update period may be a fixed value or related to frequent RRC reconfigurations.

[0128] Exemplarily, the network device will configure the C-TDW based on the capability information reported by the terminal device or the auxiliary information reported by the terminal device. For example, the network device receives the capability of the maximum number of time slots that can meet the phase rotation requirement and timing error limit reported by the terminal device. When the terminal device reports its capability according to the maximum number of time slots, it can pre-compensate to keep the phase rotation within the phase difference limit and keep the timing error within the timing error limit. The network device configures the C-TDW of the terminal device, where the configured TDW size is the upper limit of the maximum number of time slots reported by the terminal device. Optionally, the size of the C-TDW bound to the PUSCH DMRS (if configured) is the upper limit of the maximum number of time slots reported by the terminal device. Optionally, if the size of the C-TDW bound to the PUSCH DMRS is not configured, the size of the A-TDW is equal to the minimum of the maximum number of time slots reported by the terminal device, the PUSCH repetition duration, and the hopping interval of the PUSCH DMRS binding. Optionally, if the size of the C-TDW bound to the PUSCH DMRS is not configured, the size of the A-TDW is equal to the maximum of the maximum number of time slots reported by the terminal device, the PUSCH repetition duration, and the hopping interval of the PUSCH DMRS binding.

[0129] Exemplarily, the A-TDW can be explicitly indicated by the network device. For example, the network device can indicate that the A-TDW depends on the required satellite position and / or beam direction. The network device can estimate the necessary TA pre-compensation update period of the terminal device based on this information, so as to determine the A-TDW.

[0130] Exemplarily, the list of RRC parameters for the PUSCH DMRS binding for NTN can be seen in Table 1. Table 1 is the preliminary list of RRC parameters for the PUSCH DMRS bundling for NTN (Preliminary list of RRC parameters for PUSCH DMRS bundling for NTN).

[0131] Table 1

[0132]

[0133] Exemplarily, the network device can estimate / predict the timing drift based on the UL signal from the terminal device. Further, the network device can configure the C-TDW / A-TDW of the terminal device according to the timing drift, so that the terminal device can pause the pre-compensation update within the corresponding TDW without exceeding the requirements for time / frequency accuracy.

[0134] Exemplarily, C-TDW can be determined according to the relative position between the satellite and the terminal device. The relative position between the satellite and the terminal device may include the elevation angle of the terminal device relative to the satellite. For example, the larger the elevation angle between the terminal device and the satellite, the larger the configurable C-TDW. That is to say, C-TDW is positively correlated with the elevation angle. As a specific embodiment, the network device may configure multiple C-TDWs based on the variable elevation angle. These C-TDWs can be determined and indicated by the network device in a semi-static manner.

[0135] Exemplarily, the network device can also configure C-TDW according to the epoch update. That is to say, the epoch update of the satellite can also be used as an event to interrupt the DMRS bundling.

[0136] In some embodiments, when the first time domain window is A-TDW, A-TDW can be determined according to the first time interval and the time length of the C-TDW predefined / preconfigured by the network device. This DMRS bundling can be the DMRS bundling corresponding to A-TDW. Exemplarily, when antenna switching is adopted, the network device can determine A-TDW within C-TDW, or can determine the time length of A-TDW according to the capability report information of the terminal device or the auxiliary information of the terminal device.

[0137] When DMRS binding and antenna switching are used jointly, A-TDW is jointly determined by C-TDW and the first time interval of antenna switching, and a trade-off between the channel estimation gain based on DMRS bundling and the spatial diversity gain based on antenna switching can be achieved. That is to say, when the size of A-TDW is jointly determined by the size of C-TDW and the first time interval of antenna switching, the optimal uplink coverage performance of the terminal device can be explored through the trade-off between the channel estimation gain of DMRS bundling and the spatial diversity gain of antenna switching.

[0138] Exemplarily, the time length of A-TDW can be determined by the time length of C-TDW, the time for the terminal device to complete antenna switching, and the first time interval for the terminal device to perform antenna switching. For example, T A-TDW can satisfy the following conditions:

[0139] T A-TDW = min(α×T C-TDW , β×(T + M));

[0140] where min() represents taking the minimum value among them, T C-TDWIndicates the time length of C-TDW, T represents the time when the terminal device completes antenna switching, M represents the first time interval, and α and β are rational numbers representing adjustment factors respectively. α and β can be set by the network device or the terminal device. α and β can be the same or different. For example, the terminal device can adjust the magnitudes of the α and β factors respectively according to the current coverage conditions.

[0141] As a specific embodiment, the terminal device can report the first time interval M that it supports for antenna switching. The network device can determine A-TDW according to the above formula and inform the terminal device to select A-TDW.

[0142] As another specific embodiment, the terminal device needs to determine the first time interval M that it supports, and then determine the selectable A-TDW according to the above formula.

[0143] Exemplarily, the time length of A-TDW can be determined by the time length of C-TDW, the protection interval for the terminal device to perform antenna switching, and the first time interval for the terminal device to perform antenna switching. T A-TDW can satisfy the following conditions:

[0144] T A-TDW = min(α × T C-TDW , β × (K + M));

[0145] where K represents the protection interval for the terminal device to perform the antenna switching.

[0146] Exemplarily, the time length of A-TDW can be determined by the time length of C-TDW and the first time interval M for the terminal device to perform antenna switching. T A-TDW can satisfy the following conditions:

[0147] T A-TDW = min(α × T C-TDW , β × M).

[0148] In some embodiments, the time length of the first time domain window may be determined according to events that cause phase discontinuity and power inconsistency. Optionally, if the network device is configured with TACommonDrift and TACommonDriftVariation, it may still cause the update of the common TA. When the common TA is updated, it will be difficult to control the repeated transmissions that support DMRS binding. To maintain such terminal device behavior, the update of the common TA is regarded as an event. If DMRS binding is enabled, the application time of the updated common TA may be indicated or configured together with TACommonDrift and TACommonDriftVariation. In addition, the terminal device may calculate a terminal device-specific TA based on higher layer parameters related to the terminal device location and the serving satellite ephemeris (if configured). The terminal device may also report such a terminal device-specific TA to the network device, and a timing advance report (TAR) requires uplink-shared channel (UL-SCH) resources. Therefore, the application of the terminal device-specific TA should also be regarded as an event. Optionally, if a timer is configured for the epoch time of the satellite, the start / restart of the timer duration means that the serving satellite ephemeris and the common TA-related parameters share the same epoch time. If the validity timer is restarted due to the update of the epoch time within the TDW, the phase continuity and / or power consistency will not be maintained. Therefore, the application time of the updated serving satellite ephemeris may also be regarded as an event. Therefore, events that disrupt phase continuity and / or power consistency include common TA adjustment, update of the application time of the satellite ephemeris, application of the terminal device-specific TA, etc. The terminal device or the network device may determine the time length of the first time domain window according to these events. For example, when the first time domain window is the time period of segmented transmission related to DMRS bundling, these events will determine the time length of each segment.

[0149] In some embodiments, the first information may include the maximum duration for which the terminal device maintains phase continuity. That is to say, the time length of the first time domain window may be determined according to the maximum duration for which the terminal device maintains phase continuity. The maximum duration for maintaining phase continuity refers to the maximum duration within which the phase difference limit, timing, and frequency error requirements are met. The first time domain window will in no case be greater than this maximum duration. Since this maximum duration is related to the capabilities of the terminal device, the capabilities of the terminal device may include whether the terminal device uses timing drift pre-compensation in the TDW and the first time interval for antenna switching.

[0150] Exemplarily, in an NTN system, the maximum duration of a terminal device may be related to the ephemeris parameters or position parameters of a satellite. For example, the maximum duration may increase as the timing drift decreases. Also, for example, the length of the time window during which the terminal device can maintain phase continuity varies with the elevation angle of the terminal device relative to the satellite.

[0151] Exemplarily, the maximum duration may be related to the ability of the terminal device to perform TA adjustment and frequency adjustment. For an NTN system, the ability of the terminal device to maintain phase continuity and power consistency also depends on the autonomous TA adjustment and frequency adjustment implemented by the terminal device. Therefore, the maximum TDW duration supported by the terminal device should consider the impact of the terminal device's autonomous TA adjustment and frequency adjustment.

[0152] Exemplarily, the maximum TDW duration supported by the terminal device should be reflected in the UE capability report. That is, the capability report of the terminal device may indicate the maximum duration supported by the terminal device, that is, the maximum duration during which the terminal device can maintain phase continuity.

[0153] In some embodiments, the first information may include the duration of uplink channel segmented transmission. That is, the time length of the first time domain window may be determined according to the duration of uplink channel segmented transmission. The time length of the first time domain window being determined according to the duration of uplink channel segmented transmission means that the time length of the first time domain window may be determined according to the C-TDW determined by the duration of uplink channel segmented transmission. Taking the repeated transmission of PUSCH as an example, if the duration of PUSCH segmented transmission and the configuration of the DMRS bundling corresponding to PUSCH are configured separately, the size of the C-TDW of PUSCH DMRS bundling is related to the duration of PUSCH segmented transmission. Since the terminal device does not expect to perform time and frequency updates during the duration of PUSCH segmented transmission, the duration of PUSCH segmented transmission may be used as the upper limit of the C-TDW size.

[0154] Exemplarily, the duration of PUSCH segmented transmission may be determined by the network device based on the current timing drift derived from the satellite ephemeris. The network device may also indicate an updated configuration of the duration of PUSCH segmented transmission. The update of the duration of PUSCH segmented transmission will be used for the network device to autonomously reconfigure the size of the C-TDW. For example, the update configuration covers the C-TDW sizes corresponding to PUSCH-DMRS bundling of all terminal devices.

[0155] Exemplarily, for the case of uplink channel DMRS bundling, the duration of uplink channel segmented transmission can be carried in the system information block (SIB) and / or dedicated RRC signaling. For example, after the network device sets the duration of PUSCH segmented transmission, it can be indicated by SIB or dedicated RRC signaling. In other words, the duration of PUSCH segmented transmission can be configured by the network device and indicated in units of time slots or other time units through SIB or dedicated RRC signaling.

[0156] In some embodiments, the first information may further include the duration of uplink channel repetition. That is to say, the time length of the first time domain window can also be determined according to the duration of uplink channel repetition. The duration of uplink channel repetition may be related to the duration of uplink channel segmented transmission.

[0157] In some embodiments, the time length of the first time domain window can also be determined according to the frequency modulation interval of DMRS bundling.

[0158] In some embodiments, when the first time domain window is A-TDW, A-TDW can be determined according to the above-mentioned various information. For example, if the size of C-TDW corresponding to DMRS bundling is not configured, the size of A-TDW can be equal to the minimum or maximum value of some or all of the values of the maximum duration reported by the terminal device, the antenna switching interval, the duration of uplink channel segmented transmission, the duration of uplink channel repetition, and the hopping interval of uplink channel DMRS bundling.

[0159] In some embodiments, when the network device is a satellite in the NTN system, A-TDW can also be determined according to the relative position between the satellite and the terminal device and / or the timing drift corresponding to the satellite, just like C-TDW. Exemplarily, the larger the elevation angle between the terminal device and the satellite, the larger the configurable A-TDW. That is to say, A-TDW is positively correlated with the elevation angle. If C-TDW is configured according to the maximum sustainable time, the network device can configure multiple A-TDWs based on the variable elevation angle. These A-TDWs can be determined and indicated by the network device in a semi-static manner.

[0160] As can be seen from the above, when the time length of the first time domain window is determined according to the first time interval of antenna switching, it is convenient to jointly execute the DMRS bundling mechanism and the antenna switching mechanism in the transmission of the uplink channel. Further, when the time length of the first time domain window is jointly determined by the C-TDW size and the first time interval, the uplink coverage performance of the terminal device can be improved by weighing the channel estimation gain of DMRS bundling and the spatial diversity gain of antenna switching. Furthermore, when the time length of the first time domain window is determined according to the above various information, the first time domain window corresponding to DMRS bundling can be determined more reasonably based on the capabilities of the terminal device or other relevant information, thereby ensuring the gain of channel estimation.

[0161] As mentioned above, the capabilities of the terminal device include the ability to perform timing drift pre-compensation within the TDW. Pre-compensation can also be used to eliminate the Doppler frequency shift effect. Exemplarily, when the terminal device can implement compensation for its local clock, the Doppler frequency shift effect can be eliminated. Specifically, if the oscillator frequency is adjusted at the start of the TDW to cancel the Doppler frequency shift, the time drift is initially zero. Further, the impact on the TDW only increases when the Doppler frequency shift changes during the TDW, but this has only a very limited effect. For example, for a LEO-1200 satellite, the maximum one-way Doppler drift rate is 0.09 ppm / s (as shown in Table 6.1.1.1-8 of TS 38.821 [8]). After 20 ms, the maximum Doppler frequency shift of the serving link is 2 * 0.09 * 0.020 ppm = 0.0036 ppm or 7 Hz at a 2 GHz carrier frequency, and the impact caused by this frequency shift can be ignored.

[0162] In some embodiments, the impact of Doppler frequency shift or timing drift on the A-TDW and C-TDW can be determined by defining the capabilities of the terminal device to achieve pre-compensation.

[0163] Exemplarily, some terminal devices can cancel the Doppler frequency shift effect at the start of the TDW by pre-compensating their local clocks. The ability report of the terminal device can achieve pre-compensation by defining this ability.

[0164] Exemplarily, some terminal devices can update the time and frequency compensation within the TDW while maintaining coherent transmission. When doing so, it is necessary to avoid the TDW length limitation caused by pre-compensation updates. The ability report of the terminal device can define this ability to avoid pre-compensation updates.

[0165] Exemplarily, some terminal devices can only update the time and frequency pre-compensation at the TDW boundary. The ability report of the terminal device can indicate pre-compensation by defining this ability.

[0166] As described above in conjunction with Figures 1 to 6, which describes in detail the method embodiments of the present application. The following combines Figure 7 and Figure 8 , and describes in detail the device embodiments of the present application. It should be understood that the description of the device embodiments corresponds to the description of the method embodiments. Therefore, for the parts not described in detail, reference may be made to the previous method embodiments.

[0167] Figure 7 Figure Figure 7 is a schematic block diagram of a device for wireless communication according to an embodiment of the present application. The device 700 may be any of the terminal devices or network devices described above. Figure 7 The device 700 shown includes a determination unit 710.

[0168] The determination unit 710 is configurable to be used for the actual first time domain window related to the DMRS bundling of uplink channel estimation. The time length of the first time domain window is determined according to the first information, and the first information includes being determined by one or more of the following information: the first time interval for the terminal device to perform antenna switching; the time length of the nominal time domain window predefined / preconfigured by the network device; events causing phase discontinuity and power inconsistency; the maximum duration for the terminal device to maintain phase continuity; the uplink channel repetition duration; the duration of the uplink channel segmented transmission.

[0169] Optionally, the network device receiving the uplink channel is a satellite in the NTN system, and the time length of the first time domain window related to the DMRS bundling is further determined according to one or more of the following information: the relative position between the satellite and the terminal device; the timing drift corresponding to the satellite.

[0170] Optionally, the relative position between the satellite and the terminal device includes the elevation angle of the terminal device relative to the satellite, and the time length of the first time domain window related to the DMRS bundling is positively correlated with the elevation angle.

[0171] Optionally, the time length of the actual first time domain window for the demodulation reference signal DMRS bundling of the uplink channel estimation includes: the time length of the actual first time domain window determined by the terminal device receiving the network device; or, the time length of the actual first time domain window determined by the terminal device.

[0172] Optionally, the first information includes the time length of the nominal time domain window predefined / preconfigured by the network device, and the time length of the nominal time domain window and / or the time length of the first actual time domain window determined by the network device is carried in one or more of the following information: broadcast message, RRC message, DCI.

[0173] Optionally, the nominal time domain window is related to the service type corresponding to the uplink channel.

[0174] Optionally, the first information includes a first time interval for the terminal device to perform antenna switching. The antenna currently used by the terminal device to send the uplink channel is the first antenna. The timing of antenna switching is determined according to the signal quality corresponding to the first antenna, and the timing of antenna switching is related to the first time interval for the terminal device to perform antenna switching.

[0175] Optionally, the timing of antenna switching is further determined according to a first threshold related to the signal quality. When the signal quality corresponding to the first antenna is less than the first threshold, the antenna switching is triggered.

[0176] Optionally, the first information includes a first time interval for the terminal device to perform antenna switching. The time for the terminal device to complete antenna switching includes a guard interval configured by the terminal device for antenna switching.

[0177] Optionally, the first time domain window is A-TDW. The first information includes a first time interval for the terminal device to perform antenna switching and the time length of a nominal time domain window predefined / preconfigured by the network device. The time length T of A-TDW A-TDW satisfies the following condition:

[0178] T A-TDW = min(α × T C-TDW , β × (T + M));

[0179] where, T C-TDW represents the time length of the nominal time domain window, T represents the time for the terminal device to complete antenna switching, M represents the first time interval, and α, β represent adjustment factors.

[0180] Optionally, the first time domain window is A-TDW. The first information includes a first time interval for the terminal device to perform antenna switching and the time length of a nominal time domain window predefined / preconfigured by the network device. The time length T of A-TDW A-TDW satisfies the following condition:

[0181] T A-TDW = min(α × T C-TDW , β × (K + M));

[0182] where, T C-TDW represents the time length of the nominal time domain window, K represents the guard interval for the terminal device to perform antenna switching, M represents the first time interval, and α, β represent adjustment factors.

[0183] Optionally, the first information includes the maximum duration for the terminal device to maintain phase continuity. The maximum duration is related to the capabilities of the terminal device for TA adjustment and frequency adjustment.

[0184] Optionally, the maximum duration for the terminal device to maintain phase continuity is indicated through the capability report of the terminal device.

[0185] Optionally, the first information includes the duration of the uplink channel segmented transmission, and the duration of the uplink channel segmented transmission is carried in the SIB and / or dedicated RRC signaling.

[0186] Figure 8 The following is a schematic structural diagram of a communication device according to an embodiment of the present application. Figure 8 The dashed lines in indicate that the unit or module is optional. The device 800 can be used to implement the method described in the above method embodiment. The device 800 can be a chip, a terminal device or a network device.

[0187] The device 800 may include one or more processors 810. The processor 810 can support the device 800 to implement the method described in the foregoing method embodiment. The processor 810 can be a general-purpose processor or a dedicated processor. For example, the processor can be a central processing unit (CPU). Alternatively, the processor can also be other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field programmable gate arrays (FPGAs) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor can be a microprocessor or the processor can also be any conventional processor, etc.

[0188] The device 800 may further include one or more memories 820. A program is stored on the memory 820, and the program can be executed by the processor 810, so that the processor 810 executes the method described in the foregoing method embodiment. The memory 820 can be independent of the processor 810 or integrated in the processor 810.

[0189] The device 800 may further include a transceiver 830. The processor 810 can communicate with other devices or chips through the transceiver 830. For example, the processor 810 can perform data transmission and reception with other devices or chips through the transceiver 830.

[0190] An embodiment of the present application further provides a computer-readable storage medium for storing a program. The computer-readable storage medium can be applied to the terminal device or network device provided in the embodiment of the present application, and the program enables the computer to execute the methods executed by the terminal device or network device in various embodiments of the present application.

[0191] The computer-readable storage medium may be any available medium that can be read by a computer or a data storage device such as a server or a data center that integrates one or more available media. The available medium may be a magnetic medium (e.g., a floppy disk, a hard disk, a magnetic tape), an optical medium (e.g., a digital video disc (DVD)), or a semiconductor medium (e.g., a solid state disk (SSD)), etc.

[0192] An embodiment of the present application further provides a computer program product. The computer program product includes a program. The computer program product can be applied to the terminal device or the network device provided in the embodiment of the present application, and the program causes the computer to execute the methods executed by the terminal or the network device in various embodiments of the present application.

[0193] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the processes or functions described in 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 devices. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions may be transmitted from a website, a computer, a server, or a data center to another website, a computer, a server, or a data center by wire (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wirelessly (e.g., infrared, wireless, microwave, etc.).

[0194] An embodiment of the present application further provides a computer program. The computer program can be applied to the terminal device or the network device provided in the embodiment of the present application, and the computer program causes the computer to execute the methods executed by the terminal or the network device in various embodiments of the present application.

[0195] In the present application, the terms "system" and "network" can be used interchangeably. Additionally, the terms used in the present application are only for explaining the specific embodiments of the present application and are not intended to limit the present application. The terms "first", "second", "third", "fourth", etc. in the specification, claims, and drawings of the present application are used to distinguish different objects and not to describe a specific order. Furthermore, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion.

[0196] In the embodiments of the present application, the "indication" mentioned may be a direct indication, an indirect indication, or may also indicate an associated relationship. For example, A indicates B, which may mean that A directly indicates B, for example, B can be obtained through A; it may also mean that A indirectly indicates B, for example, A indicates C and B can be obtained through C; it may also mean that there is an associated relationship between A and B.

[0197] In the embodiments of the present application, the term "correspondence" may indicate a relationship of direct correspondence or indirect correspondence between two parties, may also indicate an associated relationship between two parties, or may also be relationships such as indication and being indicated, configuration and being configured, etc.

[0198] In the embodiments of the present application, "predefined" or "preconfigured" can be implemented by pre-saving corresponding codes, tables or other means that can be used to indicate relevant information in a device (for example, including a terminal device and a network device). The present application does not limit its specific implementation manner. For example, predefined can refer to what is defined in a protocol.

[0199] In the embodiments of the present application, the "protocol" may refer to a standard protocol in the communication field. For example, it may include the LTE protocol, the NR protocol, and related protocols applied to future communication systems. The present application does not limit this.

[0200] In the embodiments of the present application, determining B based on A does not mean determining B solely based on A. B can also be determined based on A and / or other information.

[0201] In the embodiments of the present application, the term "and / or" is merely a description of the associated relationship of associated objects, indicating that three relationships may exist. For example, A and / or B may indicate three situations: A exists alone, A and B exist simultaneously, and B exists alone. Additionally, in this document, the character " / " generally indicates that the associated objects before and after are in an "or" relationship.

[0202] In various embodiments of the present application, the magnitudes of the sequence numbers of the above processes do not mean the order of execution. The order of execution of each process should be determined by its function and internal logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.

[0203] In several embodiments provided by this application, it should be understood that the disclosed systems, devices, and methods can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the displayed or discussed couplings or direct couplings or communication connections to each other can be through some interfaces. The indirect couplings or communication connections of the devices or units can be in electrical, mechanical, or other forms.

[0204] The units described as separate components may or may not be physically separated. The components displayed as units may or may not be physical units, that is, they may be located in one place or distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0205] In addition, in each embodiment of this application, the functional units can be integrated into one processing unit, or each unit can exist physically alone, or two or more units can be integrated into one unit.

[0206] As described above, it is only the specific implementation manner of this application, but the protection scope of this application is not limited thereto. Any person skilled in the art within the technical scope disclosed by this application can easily think of changes or substitutions, which should all be covered within the protection scope of this application. Therefore, the protection scope of this application should be subject to the protection scope of the claimed rights.

Claims

1. A method for wireless communication, characterized in that, including: determine a first time domain window related to a demodulation reference signal DMRS bundle for uplink channel estimation, where the time length of the first time domain window is determined according to first information, and the first information includes a first time interval for the terminal device to perform antenna switching and the time length of a nominal time domain window predefined / preconfigured by the network device; wherein, the first time domain window is an actual time domain window A-TDW, and the time length of the A-TDW is determined according to the first time interval, the time length of the nominal time domain window, and the time when the terminal device completes the antenna switching.

2. The method according to claim 1, wherein The network device receiving the uplink channel is a satellite in the NTN system, and the time length of the first time domain window related to the DMRS bundle is also determined according to one or more of the following information: the relative position between the satellite and the terminal device; the timing drift corresponding to the satellite.

3. The method according to claim 2, wherein The relative position between the satellite and the terminal device includes the elevation angle of the terminal device relative to the satellite, and the time length of the first time domain window related to the DMRS bundle is positively correlated with the elevation angle.

4. The method according to claim 1, wherein The time length of the first time domain window includes: the time length of the first time domain window determined by the network device; or, the time length of the first time domain window determined by the terminal device.

5. The method according to any one of claims 1-4, characterized in that, The time length of the nominal time domain window and / or the time length of the first time domain window determined by the network device is carried in one or more of the following information: broadcast message, radio resource control RRC message, downlink control information DCI.

6. The method according to claim 5, wherein The nominal time domain window is related to the service type corresponding to the uplink channel.

7. The method according to any one of claims 1 to 4, characterized in that, The antenna of the terminal device currently transmitting the uplink channel is the first antenna, and the timing of the antenna switching is determined according to the signal quality corresponding to the first antenna, and the timing of the antenna switching is related to the first time interval for the terminal device to perform antenna switching.

8. The method according to claim 7, wherein The timing of the antenna switching is also determined according to a first threshold related to the signal quality, and the antenna switching is triggered when the signal quality corresponding to the first antenna is less than the first threshold.

9. The method according to any one of claims 1 to 4, characterized in that, The time length T of the A-TDW A-TDW satisfies the following conditions: T A-TDW = min(α × T C-TDW , β × (T + M)); where T C-TDW represents the time length of the nominal time domain window, T represents the time for the terminal device to complete the antenna switching, M represents the first time interval, and α and β represent adjustment factors.

10. The method according to any one of claims 1-4, characterized in that, The time for the terminal device to complete the antenna handover includes the guard interval configured by the terminal device for the antenna handover, and the time length T of the A-TDW A-TDW satisfies the following conditions: T A-TDW = min(α × T C-TDW , β × (K + M)); where T C-TDW represents the time length of the nominal time domain window, K represents the guard interval, M represents the first time interval, and α and β represent adjustment factors.

11. The method according to any one of claims 1 to 4, characterized in that The first information further includes the maximum duration for the terminal device to maintain phase continuity, and the maximum duration is related to the ability of the terminal device to perform timing advance TA adjustment and frequency adjustment.

12. The method according to claim 11, wherein The maximum duration for the terminal device to maintain phase continuity is indicated by the ability report of the terminal device.

13. The method according to any one of claims 1-4, characterized in that, The first information further includes the duration of the segmented transmission of the uplink channel, and the duration of the segmented transmission of the uplink channel is carried in the system information block SIB and / or dedicated RRC signaling.

14. A device for wireless communication, characterized in that, The device is a terminal device or a network device, and the device includes: a determination unit configured to determine a first time domain window related to a demodulation reference signal DMRS bundle for uplink channel estimation, where the time length of the first time domain window is determined according to first information, and the first information includes a first time interval for the terminal device to perform antenna switching and the time length of a nominal time domain window predefined / preconfigured by the network device; Among them, the first time domain window is the actual time domain window A-TDW, and the time length of the A-TDW is determined according to the first time interval, the time length of the nominal time domain window, and the time for the terminal device to complete the antenna switching.

15. The device according to claim 14, characterized in that, The network device receiving the uplink channel is a satellite in the NTN system, and the time length of the first time domain window related to the DMRS bundling is further determined according to one or more of the following information: The relative position between the satellite and the terminal device; The timing drift corresponding to the satellite.

16. The device according to claim 15, wherein The relative position between the satellite and the terminal device includes the elevation angle of the terminal device relative to the satellite, and the time length of the first time domain window related to the DMRS bundling is positively correlated with the elevation angle.

17. The device according to claim 14, characterized in that, The time length of the first time domain window includes: The time length of the first time domain window determined by the network device; Or, The time length of the first time domain window determined by the terminal device.

18. The device according to any one of claims 14 - 17, characterized in that, The time length of the nominal time domain window and / or the time length of the first time domain window determined by the network device are carried in one or more of the following information: broadcast message, radio resource control RRC message, downlink control information DCI.

19. The device according to claim 18, wherein The nominal time domain window is related to the service type corresponding to the uplink channel.

20. The device according to any one of claims 14-17, characterized in that, The antenna of the terminal device currently transmitting the uplink channel is the first antenna, and the timing of the antenna switching is determined according to the signal quality corresponding to the first antenna, and the timing of the antenna switching is related to the first time interval for the terminal device to perform antenna switching.

21. The device according to claim 20, wherein, The timing of the antenna switching is further determined according to a first threshold related to the signal quality, and the antenna switching is triggered when the signal quality corresponding to the first antenna is less than the first threshold.

22. The device according to any one of claims 14-17, characterized in that The time length T of the A-TDW A-TDW satisfies the following conditions: T A-TDW = min(α × T C-TDW , β × (T + M)); Among them, T C-TDW represents the time length of the nominal time domain window, T represents the time for the terminal device to complete the antenna switching, M represents the first time interval, and α and β represent adjustment factors.

23. The device according to any one of claims 14 - 17, characterized in that, The time for the terminal device to complete the antenna handover includes the guard interval configured by the terminal device for the antenna handover, and the time length T of the A-TDW A-TDW satisfies the following conditions: T A-TDW = min(α × T C-TDW , β × (K + M)); where T C-TDW represents the time length of the nominal time domain window, K represents the guard interval, M represents the first time interval, and α and β represent adjustment factors.

24. The device according to any one of claims 14-17, characterized in that, The first information further includes the maximum duration for the terminal device to maintain phase continuity, and the maximum duration is related to the ability of the terminal device to perform timing advance TA adjustment and frequency adjustment.

25. The device according to claim 24, characterized in that, The maximum duration for the terminal device to maintain phase continuity is indicated by the ability report of the terminal device.

26. The device according to any one of claims 14-17, characterized in that, The first information further includes the duration of the segmented transmission of the uplink channel, and the duration of the segmented transmission of the uplink channel is carried in the system information block SIB and / or dedicated RRC signaling.

27. A communication device, characterized in that, It includes a memory and a processor, the memory is used to store a program, and the processor is used to call the program in the memory to execute the method according to any one of claims 1-13.

28. A communication device, characterized in that, It includes a processor, which is used to call a program from the memory to execute the method according to any one of claims 1-13.

29. A chip, characterized in that, It includes a processor, which is used to call a program from the memory, so that the device installed with the chip executes the method according to any one of claims 1-13.

30. A computer-readable storage medium, characterized in that, A program is stored thereon, and the program enables a computer to execute the method according to any one of claims 1-13.

31. A computer program product, characterized in that, It includes a program, and the program enables a computer to execute the method according to any one of claims 1-13.

Images