Data transmission method and related device

Abstract

The embodiment of the invention relates to a data transmission method and a related device. A method includes receiving or transmitting a signal based on a first transmission mode, wherein the first transmission mode corresponds to a first port capability and / or a first bandwidth capability; performing transmission mode switching from the first transmission mode to a second transmission mode, wherein the second transmission mode corresponds to a second port capability and / or a second bandwidth capability; and receiving or transmitting a signal based on the second transmission mode. In this way, the terminal equipment can dynamically switch the transmission mode, energy saving of the terminal equipment is achieved when the service volume is small, and high-capacity transmission is achieved when the service volume is large.

Description

Technical Field

[0001] Embodiments of the present disclosure relate to the field of communications, and more particularly, to a data transmission method and related devices. Background Art

[0002] In wireless communication systems, the baseband processing capability of the terminal equipment (UE) is one of the main factors affecting the cost and power consumption of the UE, and the main factors related to the baseband processing capability include port capability and bandwidth capability. Among them, baseband processing includes at least one of the following: channel estimation, equalization, channel coding, channel decoding, symbol modulation, symbol demodulation, waveform modulation, waveform demodulation, source coding, or source decoding. In view of the large bandwidth spectrum resources of some frequency bands, the characteristics of rich multipath in the channel environment, and the diversified needs of future communication services, the UE side may have a variety of transmission and signal processing requirements with different bandwidths and different numbers of ports to meet the transmission requirements of different services under the premise of limited cost and power consumption. At present, the scheduling method of baseband processing capability needs further study. Summary of the invention

[0003] The exemplary embodiments of the present disclosure provide a data transmission method and related apparatus, which can realize the sharing of port capacity and bandwidth capacity, thereby helping to save power consumption of terminal equipment or improve user perceived rate.

[0004] In a first aspect, an embodiment of the present disclosure provides a data transmission method, which can be executed by a terminal device, or by a component in the terminal device (e.g., a processor, a chip, or a chip system, etc.), or by a logic module or software that can implement all or part of the functions of the terminal device. The method includes: receiving or sending a signal based on a first transmission mode, wherein the first transmission mode corresponds to a first port capability and / or a first bandwidth capability; performing a transmission mode switch from the first transmission mode to a second transmission mode, wherein the second transmission mode corresponds to a second port capability and / or a second bandwidth capability; and receiving or sending a signal based on the second transmission mode.

[0005] In this way, the terminal device can save power consumption of the terminal device by dynamically switching the transmission mode, or achieve higher transmission rate and improve the user's perceived rate. For example, the terminal device can save power consumption of the terminal device by dynamically closing some sending or receiving channels; or achieve higher transmission rate by dynamically opening more sending or receiving channels, thereby improving the user's perceived rate.

[0006] In some embodiments, the first port capability and the second port capability include at least one of the following: the number of pilot ports, the number of data ports, the number of pilot streams, the number of data channel streams, the number of transmitting antenna ports, the number of receiving antenna ports, the number of transmitting ports, the number of receiving ports, and the connection relationship between the radio frequency (RF) chain and the antenna.

[0007] In some embodiments, the first bandwidth capability and the second bandwidth capability include at least one of the following: single carrier bandwidth, multi-carrier aggregation bandwidth, multi-carrier aggregation number, pilot signal bandwidth, data channel bandwidth, uplink bandwidth, downlink bandwidth, and RF chain operating bandwidth.

[0008] In some embodiments, when the first port capability is greater than or equal to the second port capability, the first bandwidth capability is less than or equal to the second bandwidth capability; or when the first bandwidth capability is greater than or equal to the second bandwidth capability, the first port capability is less than or equal to the second port capability. In other words, the terminal device side can support bandwidth capability and port capability sharing. For example, the terminal device can reduce the number of transceiver ports and support larger bandwidth transmission based on the saved processing power, or the terminal device can reduce the transmission bandwidth and support more port number transmission based on the saved processing power. In this way, the terminal device can dynamically switch the working bandwidth and change the number of uplink and downlink antenna ports under a fixed capability resource pool, thereby achieving the performance requirements of power consumption and capacity of the terminal device in different channel environments.

[0009] In some embodiments, the method further includes: before executing the transmission mode switching, sending capability information indicating the capability supported by the terminal device to the network device, wherein the capability information indicates the port capability and / or bandwidth capability, the port capability includes at least the first port capability and the second port capability, and the bandwidth capability includes at least the first bandwidth capability and the second bandwidth capability.

[0010] In some embodiments, the capability information further indicates the processing delay of switching between different capabilities. In some embodiments, the processing delay of switching between different capabilities can be reported separately.

[0011] In some embodiments, the method further includes: before executing the transmission mode switching, receiving a transmission mode indication from the network device, wherein the transmission mode indication includes: the second transmission mode, and / or the effective time of the second transmission mode. In this way, the terminal device can switch the transmission mode based on the transmission mode indication of the network device, so that the network device decides the transmission mode to be switched to by the terminal device based on the real-time scheduling requirements.

[0012] In some embodiments, receiving the transmission mode indication includes at least one of the following: receiving the transmission mode indication through radio resource control (RRC) signaling; receiving the transmission mode indication through bandwidth part (BWP) configuration information; receiving the transmission mode indication through serving cell configuration information; receiving the transmission mode indication through secondary cell (SCell) activation signaling; or receiving the transmission mode indication through SCell deactivation signaling. In this way, a flexible transmission mode indication method is provided.

[0013] In some embodiments, performing transmission mode switching includes at least one of the following: changing a working port of the terminal device; changing a working bandwidth of the terminal device; or changing a baseband processing capability of the terminal device. In this way, the terminal device can achieve flexible switching between different transmission modes.

[0014] In some embodiments, the method further includes: before performing the transmission mode switching, sending a transmission mode switching request to the network device.

[0015] In some embodiments, sending the transmission mode switching request includes at least one of the following: sending the transmission mode switching request through a physical random access channel (PRACH); sending the transmission mode switching request through a physical uplink shared channel (PUSCH); or sending the transmission mode switching request through a physical uplink control channel (PUCCH). In this way, a flexible transmission mode switching request method is provided.

[0016] In some embodiments, the transmission mode switching request includes at least one of the following: an uplink resource request for reporting the second transmission mode, a reason for the terminal device to switch the transmission mode, an indication of the second transmission mode after switching, and a transmission mode switching protection interval. The above reasons for the transmission mode switching in the transmission mode switching request can be direct reasons or classified reasons, such as reasons on the terminal device side or reasons on the network device side.

[0017] In some embodiments, the triggering condition for sending a transmission mode switching request to the network device includes at least one of the following: a change in the energy saving requirement of the terminal device, a change in the channel quality of the terminal device, a change in the service load of the network device, a change in the amount of service to be transmitted by the terminal device, or a change in the channel characteristics of the terminal device. In this way, the terminal device can request the network device to switch the transmission mode based on the real-time status requirements to achieve energy saving of the terminal device, or to achieve higher rate transmission and improve the user perceived rate.

[0018] In a second aspect, an embodiment of the present disclosure provides a method, which can be executed by a network device, or by a component in the network device (e.g., a processor, a chip, or a chip system, etc.), or by a logic module or software that can implement all or part of the network device functions. The method includes: based on a first transmission mode of the terminal device, sending a signal to the terminal device or receiving a signal from the terminal device, wherein the first transmission mode corresponds to a first port capability and / or a first bandwidth capability; and after the terminal device performs a transmission mode switch from the first transmission mode to the second transmission mode, based on the second transmission mode of the terminal device, sending a signal to the terminal device or receiving a signal from the terminal device, wherein the second transmission mode corresponds to a second port capability and / or a second bandwidth capability.

[0019] In this way, network equipment can support dynamic switching of transmission modes on the terminal device side, realize power saving of terminal devices, or realize higher-speed transmission and improve user-perceived rate. For example, network equipment can dynamically change the transmission bandwidth and number of transceiver antenna ports of terminal devices based on real-time business needs; when the terminal device has energy-saving needs or the amount of business to be transmitted by the terminal device is small, by closing some RF channels, or reducing the transmission bandwidth, or reducing the number of transmission ports, the baseband signal processing requirements are reduced to achieve energy saving of the terminal device; when the channel environment of the terminal device is multipath-rich and the network load is large, by opening more transceiver channels, or switching the connection relationship between the terminal device RF chain and the physical antenna from the antenna structure using hybrid beam forming (HBF) to the antenna structure using digital beam forming (DBF), the number of air interface transmission streams of the terminal device is increased, thereby achieving high-capacity transmission.

[0020] In some embodiments, the first port capability and the second port capability include at least one of the following: the number of pilot ports, the number of data ports, the number of pilot streams, the number of data channel streams, the number of transmitting antenna ports, the number of receiving antenna ports, the number of transmitting ports, the number of receiving ports, and the connection relationship between the RF chain and the antenna.

[0021] In some embodiments, the first bandwidth capability and the second bandwidth capability include at least one of the following: single carrier bandwidth, multi-carrier aggregation bandwidth, multi-carrier aggregation number, pilot signal bandwidth, data channel bandwidth, uplink bandwidth, downlink bandwidth, and RF chain operating bandwidth.

[0022] In some embodiments, when the first port capability is greater than or equal to the second port capability, the first bandwidth capability is less than or equal to the second bandwidth capability; or when the first bandwidth capability is greater than or equal to the second bandwidth capability, the first port capability is less than or equal to the second port capability. In other words, the terminal device side can support bandwidth capability and port capability sharing to achieve the performance requirements of power consumption and capacity of the terminal device in different channel environments.

[0023] In some embodiments, the method further includes: receiving capability information from the terminal device indicating capability supported by the terminal device, wherein the capability information indicates port capability and / or bandwidth capability, the port capability includes at least a first port capability and a second port capability, and the bandwidth capability includes at least a first bandwidth capability and a second bandwidth capability.

[0024] In some embodiments, the capability information further indicates the processing delay of switching between different capabilities. In some embodiments, the processing delay of switching between different capabilities can be reported separately.

[0025] In some embodiments, the method further includes: determining one or more transmission modes supported by the terminal device based on the capability information; and determining a second transmission mode to which the terminal device is to switch from the one or more transmission modes.

[0026] In some embodiments, the method further includes: sending a transmission mode indication to the terminal device, wherein the transmission mode indication includes: the second transmission mode, and / or the effective time of the second transmission mode. In this way, the network device can determine the transmission mode that the terminal device can support based on the capability information reported by the terminal device, and decide the transmission mode to be switched to by the terminal device based on the real-time scheduling requirements.

[0027] In some embodiments, sending the transmission mode indication includes at least one of the following: sending the transmission mode indication through RRC signaling; sending the transmission mode indication through BWP configuration information; sending the transmission mode indication through serving cell configuration information; sending the transmission mode indication through SCell activation signaling; or sending the transmission mode indication through SCell deactivation signaling. In this way, a flexible transmission mode indication method is provided.

[0028] In some embodiments, the method further includes: receiving a transmission mode switching request from a terminal device.

[0029] In some embodiments, the transmission mode switching request includes at least one of the following: an uplink resource request of the terminal device for reporting the second transmission mode, the reason for the terminal device to switch the transmission mode, an indication of the second transmission mode after switching, and a transmission mode switching protection interval.

[0030] In some embodiments, the method further includes: receiving a transmission mode switched message from the terminal device, wherein the transmission mode switched message includes at least one of the following: whether the transmission mode switching is completed, the reason why the terminal device switches the transmission mode, and an indication of the second transmission mode after switching. The above reasons for the transmission mode switching in the received transmission mode switched message can be direct reasons or classified reasons, such as reasons on the terminal device side or reasons on the network device side.

[0031] In a third aspect, an embodiment of the present disclosure provides a communication device. The communication device includes a transceiver module and a processing module; the transceiver module is used to receive or send a signal based on a first transmission mode, wherein the first transmission mode corresponds to a first port capability and / or a first bandwidth capability; the processing module is used to perform a transmission mode switch from the first transmission mode to a second transmission mode, wherein the second transmission mode corresponds to a second port capability and / or a second bandwidth capability; the transceiver module is also used to receive or send a signal based on the second transmission mode.

[0032] In some embodiments, the first port capability and the second port capability include at least one of the following: the number of pilot ports, the number of data ports, the number of pilot streams, the number of data channel streams, the number of transmitting antenna ports, the number of receiving antenna ports, the number of transmitting ports, the number of receiving ports, and the connection relationship between the RF chain and the antenna.

[0033] In some embodiments, the first bandwidth capability and the second bandwidth capability include at least one of the following: single carrier bandwidth, multi-carrier aggregation bandwidth, multi-carrier aggregation number, pilot signal bandwidth, data channel bandwidth, uplink bandwidth, downlink bandwidth, and RF chain operating bandwidth.

[0034] In some embodiments, when the first port capability is greater than or equal to the second port capability, the first bandwidth capability is less than or equal to the second bandwidth capability; or when the first bandwidth capability is greater than or equal to the second bandwidth capability, the first port capability is less than or equal to the second port capability.

[0035] In some embodiments, the transceiver module is also used to: before executing the transmission mode switching, send capability information indicating the capability supported by the terminal device to the network device, wherein the capability information indicates the port capability and / or bandwidth capability, the port capability includes at least the first port capability and the second port capability, and the bandwidth capability includes at least the first bandwidth capability and the second bandwidth capability.

[0036] In some embodiments, the capability information further indicates a processing delay of switching between different capabilities. In some embodiments, the processing delay of switching between different capabilities may be reported separately by the transceiver module.

[0037] In some embodiments, the transceiver module is further used to: before executing the transmission mode switching, receive a transmission mode indication from the network device, wherein the transmission mode indication includes the second transmission mode and / or the effective time of the second transmission mode.

[0038] In some embodiments, the transceiver module receives the transmission mode indication through at least one of the following: receiving the transmission mode indication through RRC signaling; receiving the transmission mode indication through BWP configuration information; receiving the transmission mode indication through serving cell configuration information; receiving the transmission mode indication through SCell activation signaling; or receiving the transmission mode indication through SCell deactivation signaling.

[0039] In some embodiments, the processing module performs transmission mode switching by at least one of: changing a working port of the terminal device; changing a working bandwidth of the terminal device; or changing a baseband processing capability of the terminal device.

[0040] In some embodiments, the transceiver module is further used to: before executing the transmission mode switching, send a transmission mode switching request to the network device.

[0041] In some embodiments, the transceiver module sends the transmission mode switching request through at least one of the following: sending the transmission mode switching request through PRACH; sending the transmission mode switching request through PUSCH; or sending the transmission mode switching request through PUCCH.

[0042] In some embodiments, the transmission mode switching request includes at least one of the following: an uplink resource request for reporting the second transmission mode, the reason why the terminal device switches the transmission mode, an indication of the second transmission mode after switching, and a transmission mode switching protection interval.

[0043] In some embodiments, the triggering condition for sending a transmission mode switching request to a network device includes at least one of the following: a change in the energy saving requirement of the terminal device, a change in the channel quality of the terminal device, a change in the service load of the network device, a change in the amount of service to be transmitted by the terminal device, or a change in the channel characteristics of the terminal device.

[0044] Optionally, the transceiver module may include a sending module and a receiving module. The sending module is used to perform the sending operation in the above embodiment. The receiving module is used to perform the receiving operation in the above embodiment.

[0045] In a fourth aspect, an embodiment of the present disclosure provides a communication device. The communication device includes a transceiver module; the transceiver module is used to send a signal to a terminal device or receive a signal from a terminal device based on a first transmission mode of the terminal device, wherein the first transmission mode corresponds to a first port capability and / or a first bandwidth capability; the transceiver module is also used to: after the terminal device performs a transmission mode switch from the first transmission mode to the second transmission mode, send a signal to the terminal device or receive a signal from the terminal device based on the second transmission mode of the terminal device, wherein the second transmission mode corresponds to a second port capability and / or a second bandwidth capability.

[0046] In some embodiments, the first port capability and the second port capability include at least one of the following: the number of pilot ports, the number of data ports, the number of pilot streams, the number of data channel streams, the number of transmitting antenna ports, the number of receiving antenna ports, the number of transmitting ports, the number of receiving ports, and the connection relationship between the RF chain and the antenna.

[0047] In some embodiments, the first bandwidth capability and the second bandwidth capability include at least one of the following: single carrier bandwidth, multi-carrier aggregation bandwidth, multi-carrier aggregation number, pilot signal bandwidth, data channel bandwidth, uplink bandwidth, downlink bandwidth, and RF chain operating bandwidth.

[0048] In some embodiments, when the first port capability is greater than or equal to the second port capability, the first bandwidth capability is less than or equal to the second bandwidth capability; or when the first bandwidth capability is greater than or equal to the second bandwidth capability, the first port capability is less than or equal to the second port capability.

[0049] In some embodiments, the transceiver module is also used to: receive capability information from the terminal device indicating capability supported by the terminal device, wherein the capability information indicates port capability and / or bandwidth capability, the port capability includes at least a first port capability and a second port capability, and the bandwidth capability includes at least a first bandwidth capability and a second bandwidth capability.

[0050] In some embodiments, the capability information further indicates the processing delay of switching between different capabilities. In some embodiments, the processing delay of switching between different capabilities can be reported separately.

[0051] In some embodiments, the communication apparatus further includes a processing module, the processing module being used to: determine one or more transmission modes supported by the terminal device based on the capability information; and determine a second transmission mode to which the terminal device is to switch from the one or more transmission modes.

[0052] In some embodiments, the transceiver module is further used to: send a transmission mode indication to the terminal device, wherein the transmission mode indication includes the second transmission mode, and / or the effective time of the second transmission mode.

[0053] In some embodiments, the transceiver module sends the transmission mode indication through at least one of the following: sending the transmission mode indication through RRC signaling; sending the transmission mode indication through BWP configuration information; sending the transmission mode indication through serving cell configuration information; sending the transmission mode indication through SCell activation signaling; or sending the transmission mode indication through SCell deactivation signaling.

[0054] In some embodiments, the transceiver module is further used to: receive a transmission mode switching request from a terminal device.

[0055] In some embodiments, the transmission mode switching request includes at least one of the following: an uplink resource request of the terminal device for reporting the second transmission mode, the reason for the terminal device to switch the transmission mode, an indication of the second transmission mode after switching, and a transmission mode switching protection interval.

[0056] In some embodiments, the transceiver module is also used to: receive a transmission mode switched message from a terminal device, wherein the transmission mode switched message includes at least one of the following: whether the transmission mode switch is completed, the reason why the terminal device switches the transmission mode, and an indication of the second transmission mode after switching.

[0057] Optionally, the transceiver module may include a sending module and a receiving module. The sending module is used to perform the sending operation in the above embodiment. The receiving module is used to perform the receiving operation in the above embodiment.

[0058] In a fifth aspect, an embodiment of the present disclosure provides a communication device, wherein the communication device includes a processor, the processor being configured to execute a computer program or computer instruction in a memory to execute a method as described in the first aspect or the second aspect or any of the embodiments thereof.

[0059] Optionally, the communication device further includes a transceiver, and the processor is used to control the transceiver to send and receive signals. The transceiver includes a transmitter and a receiver, the transmitter is used to perform the sending operation in the above embodiment, and the receiver is used to perform the receiving operation in the above embodiment.

[0060] In a sixth aspect, an embodiment of the present disclosure provides a communication device. The communication device includes: a processor and a memory. The memory stores a computer program or a computer instruction, and the processor is used to call and run the computer program or the computer instruction stored in the memory, so that the processor implements the method in the first aspect or the second aspect or any embodiment thereof.

[0061] Optionally, the communication device further includes a transceiver, and the processor is used to control the transceiver to send and receive signals. The transceiver includes a transmitter and a receiver, the transmitter is used to perform the sending operation in the above embodiment, and the receiver is used to perform the receiving operation in the above embodiment.

[0062] In a seventh aspect, an embodiment of the present disclosure provides a communication device. The communication device includes a processor and an interface circuit, the processor is used to communicate with other devices through the interface circuit, and execute the method as described in the first aspect or the second aspect or any embodiment thereof. The processor includes one or more.

[0063] In an eighth aspect, an embodiment of the present disclosure provides a communication device. The communication device includes a processor, which is connected to a memory and is used to call a program stored in the memory to execute a method as in the first aspect or the second aspect or any embodiment thereof. The memory may be located inside the communication device or outside the device. And the processor includes one or more.

[0064] In some embodiments, the apparatus of the third to eighth aspects described above may be a chip or a chip system.

[0065] In a ninth aspect, an embodiment of the present disclosure provides a computer program product comprising computer instructions, which, when executed on a computer, enables the computer to execute the method of the first aspect or the second aspect or any of its embodiments.

[0066] In a tenth aspect, an embodiment of the present disclosure provides a computer-readable storage medium, comprising computer instructions, which, when executed on a computer, enable the computer to execute a method as in the first aspect or the second aspect or any of its embodiments.

[0067] In an eleventh aspect, an embodiment of the present disclosure provides a chip device, comprising a processor, for calling a computer program or computer instructions in a memory so that the processor executes a method as in the first aspect or the second aspect or any embodiment thereof.

[0068] Optionally, the processor is coupled to the memory via an interface.

[0069] In the twelfth aspect, an embodiment of the present disclosure provides a communication system, which includes a first device and a second device; the first device is used to execute the method in any embodiment of the first aspect, and the second device is used to execute the method in the second aspect or any embodiment thereof. BRIEF DESCRIPTION OF THE DRAWINGS

[0070] The above and other features, advantages and aspects of the embodiments of the present disclosure will become more apparent with reference to the following detailed description in conjunction with the accompanying drawings. Several implementations of the present disclosure are shown here in an exemplary and non-limiting manner. In the accompanying drawings:

[0071] Figure 1A A schematic diagram showing a communication system in which some embodiments of the present disclosure may be applied;

[0072] Figure 1B A schematic diagram showing another communication system in which some embodiments of the present disclosure may be applied;

[0073] Figure 1C A schematic diagram showing a network element structure according to some embodiments of the present disclosure;

[0074] Figure 2 A schematic signaling diagram showing a communication process according to some embodiments of the present disclosure;

[0075] Figure 3 A schematic signaling diagram showing another communication process according to some embodiments of the present disclosure;

[0076] Figure 4 A schematic signaling diagram showing another communication process according to some embodiments of the present disclosure;

[0077] Figure 5 A flow chart showing a communication process according to some embodiments of the present disclosure;

[0078] Figure 6 A flow chart showing another communication process according to some embodiments of the present disclosure;

[0079] Figure 7 A schematic diagram showing the structure of a possible communication device provided according to an embodiment of the present disclosure is shown;

[0080] Figure 8 A schematic structural diagram of another possible communication device provided according to an embodiment of the present disclosure is shown.

[0081] In the various drawings, the same or similar reference numerals represent the same or similar elements. DETAILED DESCRIPTION

[0082] Embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although certain embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be construed as being limited to the embodiments set forth herein. On the contrary, these embodiments are provided to provide a more thorough and complete understanding of the present disclosure. It should be understood that the drawings and embodiments of the present disclosure are only for exemplary purposes and are not intended to limit the scope of protection of the present disclosure.

[0083] In the present disclosure, the term "including" and similar terms should be understood as open inclusion, i.e., "including but not limited to". The term "based on" should be understood as "based at least in part on". The term "one embodiment" or "the embodiment" should be understood as "at least one embodiment". The terms "first", "second", etc. may refer to different or the same objects. Other explicit and implicit definitions may also be included below.

[0084] It can be understood that "sending" and "receiving" in the present disclosure indicate the direction of signal transmission. For example, "sending information to XX" can be understood as the destination of the information is XX, which can include direct sending through the air interface, and also include indirect sending through the air interface by other units or modules. "Receiving information from YY" can be understood as the source of the information is YY, which can include direct receiving from YY through the air interface, and also include indirect receiving from YY through the air interface from other units or modules. "Sending" can also be understood as the "output" of the chip interface, and "receiving" can also be understood as the "input" of the chip interface.

[0085] In other words, sending and receiving can be performed between devices, for example, between a network device and a terminal device, or can be performed within a device, for example, sending or receiving between components, modules, chips, software modules, or hardware modules within the device through a bus, wiring, or interface.

[0086] It is understandable that information may be processed between the source and destination of information transmission, such as coding, modulation, etc., but the destination can understand the valid information from the source. Similar expressions in this disclosure can be understood similarly and will not be repeated.

[0087] The terminal device and network device involved in the present disclosure are introduced below.

[0088] Terminal equipment, also known as user equipment (UE), mobile station (MS), mobile terminal (MT), customer premise equipment (CPE), etc. Terminal equipment is a device that includes wireless communication functions (providing voice / data connectivity to users). For example, handheld devices with wireless connection functions, vehicle-mounted devices, machine type communication (MTC) terminals, etc. At present, terminal equipment can include: mobile phones, tablet computers, laptops, PDAs, mobile Internet devices (MID), wearable devices, virtual reality (VR) devices, augmented reality (AR) devices, wireless terminals in industrial control, wireless terminals in self driving, wireless terminals in remote medical surgery, wireless terminals in smart grids, wireless terminals in transportation safety, wireless terminals in smart cities, or wireless terminals in smart homes, etc. For example, the wireless terminal in unmanned driving can be a drone, helicopter, or airplane. For example, the wireless terminal in the Internet of Vehicles can be a vehicle-mounted device, vehicle equipment, vehicle-mounted module, vehicle, or ship. The wireless terminal in industrial control can be a camera, robot, or robotic arm. The wireless terminal in a smart home can be a TV, air conditioner, sweeper, speaker, or set-top box.

[0089] It should be noted that the terminal device may be a device or apparatus with a chip, or a device or apparatus with integrated circuits, or a chip, module or control unit in the device or apparatus shown above, and the present disclosure does not limit this.

[0090] A network device is a device deployed in a radio access network to provide wireless communication functions for terminal devices. A network device can also be called an access network (RAN) entity, an access node, a network node, or a communication device.

[0091] Specifically, the network device may be an access network device of a cellular system related to the third generation partnership project (3GPP). For example, a fourth-generation (4G) mobile communication system, or a 5G mobile communication system. The network device may also be an access network device in an open access network (open RAN, O-RAN or ORAN) or a cloud radio access network (cloud radio access network, CRAN). Alternatively, the network device may also be an access network device in a communication system obtained by integrating two or more of the above communication systems.

[0092] The network equipment includes, but is not limited to: evolved Node B (eNB), radio network controller (RNC), Node B (NB), base station controller (BSC), base transceiver station (BTS), home base station (e.g., home evolved NodeB, or home Node B, HNB), baseband unit (BBU), access point (AP) in wireless fidelity (WIFI) system, macro base station, micro base station, wireless relay node, donor node, wireless controller in CRAN scenario, wireless backhaul node, transmission point (TP) or transmission and receiving point (TRP). The network equipment can also be an access network equipment in a 5G mobile communication system. For example, the next generation NodeB (gNB) in a new radio (NR) system, TRP, TP, or one or a group of antenna panels (including multiple antenna panels) of a base station in a 5G mobile communication system. Alternatively, the network device may also be a network node constituting a gNB or a transmission point. For example, a centralized unit (CU), a distributed unit (DU), a CU-control plane (CP), a CU-user plane (UP), or a radio unit (RU). The CU and DU may be separately configured or may be included in the same network element. For example, a BBU. The RU may be included in a radio frequency device or a radio frequency unit. For example, in a remote radio unit (RRU), an active antenna unit (AAU), or a remote radio head (RRH). Alternatively, the network device may also be a server, a wearable device, a vehicle, or an on-board device. For example, in V2X technology, the network device may be a roadside unit (RSU).

[0093] It should be noted that in different systems, CU (or CU-CP and CU-UP), DU or RU may also have different names, but those skilled in the art can understand their meanings. For example, in an open radio access network (ORAN) system, CU may also be referred to as an open centralized unit (O-CU) or an open CU, DU may also be referred to as an open distributed unit (O-DU), a centralized unit control plane (CU-CP) may also be referred to as an open centralized unit control plane (O-CU-CP) or an open CU-CP, a centralized unit user plane (CU-UP) may also be referred to as an open centralized unit user plane (O-CU-UP) or an open CU-UP, and RU may also be referred to as an open radio unit (O-RU), which is not specifically limited in the present disclosure. Any of the CU, CU-CP, CU-UP, DU and RU in the present disclosure may be implemented together through a software module, a hardware module, or a combination of a software module and a hardware module.

[0094] Optionally, for network elements in the ORAN system, each network element may implement the protocol layer functions shown in Table 1 below.

[0095] Table 1

[0096]

[0097]

[0098] It should be noted that the network device may be one or more network elements shown in Table 1 above, and the present disclosure does not make any specific limitation thereto.

[0099] It should be noted that the above Table 1 is only an example. In practical applications, the protocol layer functions supported by each network element are not limited. For example, each network element may support more protocol layer functions, or the protocol layer functions supported by each network element may be specifically configured in combination with actual conditions. This disclosure does not limit this.

[0100] The following describes the architecture of the CU and DU of the access network device. The access network device includes at least one CU and at least one DU. Optionally, the access network device also includes at least one RU.

[0101] The following is an introduction using an access network device including a CU and a DU as an example. The CU has some functions of the core network, and the CU may include a CU-CP and a CU-UP. The CU and the DU may be configured according to the protocol layer functions of the wireless network they implement. For example, the CU is configured to implement the functions of the PDCP layer and the protocol layers above (for example, the RRC layer and / or the SDAP layer). The DU is configured to implement the functions of the protocol layers below the PDCP layer (for example, the RLC layer, the MAC layer, and / or the PHY layer). For another example, the CU is configured to implement the functions of the protocol layers above the PDCP layer (such as the RRC layer and / or the SDAP layer), and the DU is configured to implement the functions of the PDCP layer and the protocol layers below (for example, the RLC layer, the MAC layer, and / or the PHY layer, etc.).

[0102] When the CU includes a CU-CP and a CU-UP, the CU-CP is used to implement the control plane function of the CU, and the CU-UP is used to implement the user plane function of the CU. For example, when the CU is configured to implement the functions of the PDCP layer, the RRC layer, and the SDAP layer, the CU-CP is used to implement the control plane function of the RRC layer and the PDCP layer, and the CU-UP is used to implement the user plane function of the SDAP layer and the PDCP layer.

[0103] CU-CP can interact with network elements in the core network for implementing control plane functions. The network elements in the core network for implementing control plane functions can be access and mobility function network elements, such as the access and mobility management function (AMF) in the 5G mobile communication system. The access and mobility function network element is responsible for mobility management in the mobile network, such as location update of terminal equipment, registration network of terminal equipment, switching of terminal equipment, etc. CU-UP can interact with network elements in the core network for implementing user plane functions. The network elements in the core network for implementing user plane functions, such as the user plane function (UPF) in the 5G mobile communication system, are responsible for forwarding and receiving data in the terminal device.

[0104] The above configuration of CU and DU is only an example, and the functions of CU and DU can also be configured as needed. For example, the CU or DU can be configured to have the functions of more protocol layers, or the CU or DU can be configured to have partial processing functions of the protocol layer. For example, some functions of the RLC layer and the functions of the protocol layers above the RLC layer are set in the CU, and the remaining functions of the RLC layer and the functions of the protocol layers below the RLC layer are set in the DU. For another example, the functions of the CU or DU can be divided according to the service type or other system requirements. For example, by delay, the functions that need to meet the smaller delay requirements for processing time are set in the DU, and the functions that do not need to meet the delay requirements are set in the CU.

[0105] DU and RU can cooperate to jointly implement the functions of the PHY layer. A DU can be connected to one or more RUs. The functions of DU and RU can be configured in a variety of ways according to the design. For example, DU is configured to implement baseband functions, and RU is configured to implement mid-RF functions. For another example, DU is configured to implement high-level functions in the PHY layer, and RU is configured to implement low-level functions in the PHY layer or to implement the low-level functions and RF functions. The high-level functions in the physical layer may include a part of the functions of the physical layer, which is closer to the MAC layer, and the low-level functions in the physical layer may include another part of the functions of the physical layer, which is closer to the mid-RF side.

[0106] Optionally, the network device may also be a core network device. The core network device is responsible for access control, registration management, service management, mobility management, etc. of the terminal device accessing the network. Some embodiments of the present disclosure may involve beams, and the embodiment of beams in the NR protocol may be a spatial domain filter, or a spatial filter, or a spatial domain parameter, a spatial parameter, a spatial domain setting, a spatial setting, or Quasi-colocation (QCL) information, QCL assumption, QCL indication, etc. The beam may be indicated by a transmission configuration indicator (TCI) state (TCI-state) parameter, or by a spatial relation parameter. Therefore, in the present disclosure, beam can be replaced by spatial filter, spatial filter, spatial parameter, spatial parameter, spatial setting, spatial setting, QCL information, QCL assumption, QCL indication, TCI-state (uplink (DL) TCI-state, downlink (UL) TCI-state), spatial relationship, etc. The above terms are also equivalent to each other. Beam can also be replaced by other terms representing beams, which is not limited in the present disclosure.

[0107] The beam used to transmit a signal may be referred to as a transmission beam (Tx beam), and may also be referred to as a spatial domain transmission filter, a spatial transmission filter, a spatial domain transmission parameter, or a spatial transmission parameter, a spatial domain transmission setting, or a spatial transmission setting. The downlink transmission beam may be specified by TCI-state.

[0108] The beam used to receive the signal may be referred to as a reception beam (Rx beam), and may also be referred to as a spatial domain reception filter, a spatial reception filter, a spatial domain reception parameter or a spatial reception parameter, a spatial domain reception setting or a spatial reception setting. The uplink transmit beam may be indicated by a spatial relation, or an uplink TCI-state, or a sounding reference signal (SRS) resource (indicating a transmit beam using the SRS). Therefore, the uplink beam may also be replaced by an SRS resource.

[0109] The transmit beam may refer to the distribution of signal strength in different directions of space after the signal is transmitted by the antenna, and the receive beam may refer to the distribution of signal strength in different directions of space of the wireless signal received from the antenna.

[0110] In addition, the beam may be a wide beam, a narrow beam, or other types of beams. The technology for forming the beam may be a beamforming technology or other technologies. The beamforming technology may specifically be a digital beamforming technology, an analog beamforming technology, or a hybrid digital / analog beamforming technology.

[0111] Beams generally correspond to resources. For example, when performing beam measurement, the network device measures different beams through different resources. The terminal device feeds back the measured resource quality, and the network device knows the quality of the corresponding beam. During data transmission, beam information is also indicated by its corresponding resources. For example, the network device indicates the information of the physical downlink shared channel (PDSCH) beam of the terminal device through the TCI field in the downlink control information (DCI).

[0112] Optionally, multiple beams with the same or similar communication characteristics are regarded as one beam. One beam may include one or more antenna ports for transmitting data channels, control channels, and sounding signals. One or more antenna ports forming a beam may also be regarded as an antenna port set.

[0113] In the embodiments of the present disclosure, unless otherwise specified, a beam refers to a transmission beam of a network device. In beam measurement, each beam of a network device corresponds to a resource, so the beam corresponding to the resource can be uniquely identified by the index of the resource.

[0114] There may be multiple transmission modes on the terminal device side to meet different service transmission requirements. In order to reduce the implementation cost of the terminal device, a feasible implementation method being explored is to "pool" the baseband processing capabilities on the terminal device side, that is, to unitize the baseband processing capabilities on the terminal device side, and combine different capability units to complete baseband signal processing based on actual transmission requirements. Baseband processing includes at least one of the following: channel estimation, equalization, channel coding, channel decoding, symbol modulation, symbol demodulation, waveform modulation, waveform demodulation, source coding, or source decoding.

[0115] As used in the present disclosure, the term "transmission mode" may generally refer to a certain mode or configuration for transmission, that is, a certain parameter or parameter combination for transmission. For example, "transmission mode" may refer to one or more parameters associated with the transmission capability (e.g., port capability and bandwidth capability) of the terminal device side. Specifically, the transmission mode may be defined as different values ​​of the transmission capability parameter, in which case different values ​​of the same transmission capability parameter correspond to different transmission modes, and different transmission capability parameters correspond to different transmission modes; the transmission mode may also be defined as a combination of multiple transmission capability parameters, and the capability parameter combination corresponding to each transmission mode may be the same, but with different values.

[0116] Based on the protocol, the terminal device can report the supported carrier aggregation (CA) aggregation capability and component carrier (CC) level signal processing capability. The CA aggregation capability includes the maximum number of CCs that can be activated simultaneously in the downlink, the combination of CCs for simultaneous data transmission, the maximum number of CCs that can be activated simultaneously in the uplink, and the combination of CCs for simultaneous data transmission. The CC-level signal processing capability includes the maximum downlink transmission capability of a single CC: downlink transmission bandwidth, the maximum number of spatial streams supported by downlink data transmission ("maxNumberMIMO-LayersPDSCH"), and the number of downlink receiving antenna ports; the maximum uplink transmission capability of a single CC: the maximum uplink transmission bandwidth of a single CC, the maximum number of spatial streams supported by uplink data transmission ("maxNumberMIMO-LayersPDSCH"), and the number of uplink transmitting antenna ports.

[0117] These reported parameter combinations represent the maximum mid-band radio frequency transceiver capability and baseband processing capability of the terminal device. For example, the downlink supports 4 CCs, each CC has a maximum bandwidth of 100MHz, and the maximum number of multiple-input multiple-output (MIMO) streams is 4 streams. This means that the terminal device can process a maximum bandwidth of 400MHz and receive and demodulate 4 parallel streams.

[0118] However, for the maximum capability combination reported by the terminal device (for example, the carrier aggregation capability is a single CC, the maximum bandwidth of each CC is 100MHz, and there are 4 parallel streams), when the network load is low, the main path of the user channel is dominant, and the system available spectrum is 400MHz, then the terminal device side adopts 100MHz+1 stream transmission. Since the actual number of user transmission streams is less than the maximum number of supported streams, there is a surplus in the baseband processing capability on the terminal device side, but due to the maximum bandwidth reported, the transmission rate on the terminal device side or the user perceived rate is not maximized.

[0119] Some embodiments of the present disclosure provide a data transmission solution for sharing bandwidth capability and port capability on the terminal device side. Through this solution, based on actual business scheduling requirements, the baseband processing capability of the terminal device side for different combinations of bandwidth and ports is dynamically adjusted, so as to maximize the user transmission capacity or user perceived rate under the premise that the baseband processing capability of the terminal device is fixed.

[0120] Figure 1A A schematic diagram of a communication system 100 in which some embodiments of the present disclosure may be applied is shown. Exemplarily, the communication system 100 is a mobile communication system, including a single network device 110-1 and multiple terminal devices 120-1 and 120-2, and the single network device may transmit data or control signaling to a single or multiple terminal devices.

[0121] Figure 1B A schematic diagram of a communication system 150 in which some embodiments of the present disclosure may be applied is shown. Exemplarily, the communication system 150 is a mobile communication system, including multiple network devices 110-2, 110-3 and 110-4 and a single terminal device 120-3, and the multiple network devices may simultaneously transmit data or control signaling for the single terminal device.

[0122] It is important to understand that Figure 1A and Figure 1BThe scenarios, number of devices, and connections therebetween are shown for illustrative purposes only and do not imply any limitation. The embodiments of the present disclosure may also be applied to other possible scenarios. In some embodiments, network devices 110-1, 110-2, 110-3, and 110-4 may be collectively referred to as network devices 110 or base stations 110, and terminal devices 120-1, 120-2, and 120-3 may be collectively referred to as terminal devices 120 or UE 120.

[0123] Figure 1A and Figure 1B The communication between each network device and each terminal device in the communication system shown can also be expressed in another form, such as Figure 1C As shown, the terminal device 120 includes a processor 121, a memory 122 and a transceiver 123, and the transceiver 123 includes a transmitter 1231, a receiver 1232 and an antenna 1233. The network device 110 includes a processor 111, a memory 112 and a transceiver 113, and the transceiver 113 includes a transmitter 1131, a receiver 1132 and an antenna 1133. The receiver 1232 can be used to receive transmission control information through the antenna 1233, and the transmitter 1231 can be used to send transmission feedback information to the network device 110 through the antenna 1233. The transmitter 1131 can be used to send transmission control information to the terminal device 120 through the antenna 1133, and the receiver 1132 can be used to receive the transmission feedback information sent by the terminal device 120 through the antenna 1133.

[0124] Figure 2 FIG. 2 shows a schematic signaling diagram of a communication process 200 according to some embodiments of the present disclosure. Figures 1A to 1C To describe Figure 2 , for example, process 200 may involve network device 110 and terminal device 120 .

[0125] refer to Figure 2 In 201, the network device 110 and the terminal device 120 may send and receive data based on a first transmission mode, and the first transmission mode corresponds to a first port capability and / or a first bandwidth capability. For example, the terminal device 120 may receive data from the network device 110 or send data to the network device 110 based on the first transmission mode, and accordingly, the network device 110 may send data to the terminal device 120 or receive data from the terminal device 120 based on the first transmission mode of the terminal device 120.

[0126] The terminal device 120 performs 202 a transmission mode switch from the first transmission mode to the second transmission mode, the second transmission mode corresponding to the second port capability and / or the second bandwidth capability. Then, the network device 110 and the terminal device 120 can send and receive data based on the second transmission mode, for example, the terminal device 120 can receive data from the network device 110 or send data to the network device 110 based on the second transmission mode, and accordingly, the network device 110 can send data to the terminal device 120 or receive data from the terminal device 120 based on the second transmission mode of the terminal device 120.

[0127] In some embodiments, the port capability may be the number of ports that the terminal device can support, including one or more of the following: the number of pilot ports, the number of data ports, the number of pilot streams, the number of data channel streams, the number of transmit antenna ports, the number of receive antenna ports, the number of transmit ports, the number of receive ports, and the connection relationship between the RF chain and the antenna. The first port capability and the second port capability are one or more of the above port capabilities, and the parameters used by the first port capability and the second port capability are the same. For example, if the first port capability includes the number of transmit antenna ports, the second port capability also includes the number of transmit antenna ports.

[0128] In some embodiments, the bandwidth capability may be a bandwidth that can be supported by the terminal device, including one or more of the following: single carrier bandwidth, multi-carrier aggregation bandwidth, number of multi-carrier aggregations, pilot signal bandwidth, data channel bandwidth, uplink bandwidth, downlink bandwidth, and operating bandwidth of the RF chain. The first bandwidth capability and the second bandwidth capability are one or more of the above bandwidth capabilities, and the parameters used by the first bandwidth capability and the second bandwidth capability are the same. For example, if the first bandwidth capability includes the pilot signal bandwidth, the second bandwidth capability also includes the pilot signal bandwidth.

[0129] In some embodiments, the baseband processing capability of the terminal device can support switching between different bandwidths and different numbers of ports. For example, in one implementation, the terminal device can reduce the number of transceiver ports and support transmission with a larger bandwidth based on the saved processing capability; in another implementation, the terminal device can reduce the transmission bandwidth and support transmission with a larger number of ports based on the saved processing capability.

[0130] In this case, when the first port capability is greater than or equal to the second port capability, the first bandwidth capability may be less than or equal to the second bandwidth capability; when the first bandwidth capability is greater than or equal to the second bandwidth capability, the first port capability may be less than or equal to the second port capability.

[0131] In some embodiments, before performing transmission mode switching, the terminal device 120 may send capability information indicating capability supported by the terminal device 120 to the network device 110 , where the capability information indicates port capability and / or bandwidth capability.

[0132] Optionally, the capability information can also indicate whether the terminal device supports bandwidth capability and port capability sharing, that is, whether the baseband processing capability of the terminal device can support switching between different bandwidths and different numbers of ports. Optionally, the capability information can also indicate the processing delay of switching between different capabilities. This parameter can be used to characterize the processing time required for the terminal device to switch the working bandwidth, or the processing time required for the terminal device to switch the RF Chain (radio frequency chain) and the physical antenna connection relationship, or the processing time required for the terminal device to switch the number of ports, or the processing time required for the terminal device to reconstruct the baseband processing capability. Optionally, the processing delay of switching between different capabilities can also be reported separately. Optionally, the capability information may also indicate a capability conversion factor "a" between bandwidth and port. This capability parameter may be used to characterize that when the terminal device adjusts the bandwidth from A1 to A2, the number of supported ports may be adjusted from B1 to B2, and the value of B2 is related to "a", A1, A2, and B1; or when the terminal device adjusts the number of ports from A1 to A2, the supportable bandwidth may be adjusted from B1 to B2, and the value of B2 is related to "a", A1, A2, and B1.

[0133] In some embodiments, the network device 110 may send a transmission mode indication to the terminal device 120, and the terminal device 120 may perform transmission mode switching based on the transmission mode indication. For example, the transmission mode indication includes the second transmission mode to which the terminal device 120 is to switch, and optionally, the effective time of the second transmission mode, and then the terminal device 120 may switch from the first transmission mode to the second transmission mode.

[0134] In one implementation, the network device may determine the transmission modes that the terminal device can support based on the capability information reported by the terminal device, and decide the transmission mode to which the terminal device should switch based on real-time scheduling requirements.

[0135] The triggering event for the network device to send a transmission mode indication may be one or more of the following: after the terminal device successfully accesses the initial access, the network device configures a default transmission mode for it; the network device decides to switch the transmission mode of the terminal device based on real-time service scheduling requirements, that is, switching from one transmission mode to another transmission mode; the network device decides to switch the transmission mode of the terminal device based on the reported information of the terminal device (for example, the terminal device reports that the battery is insufficient and the energy-saving mode needs to be turned on), that is, switching from one transmission mode to another transmission mode; the network device decides to switch the transmission mode of the terminal device based on the channel environment of the terminal device (for example, rich multipath, using the most ports to achieve higher flow number transmission; main path is dominant, using fewer ports and low flow number transmission), that is, switching from one transmission mode to another transmission mode.

[0136] In some embodiments, the network device may send a transmission mode indication to the terminal device via RRC signaling. Optionally, the network device may send a transmission mode indication to the terminal device via BWP configuration information. Optionally, the network device may send a transmission mode indication to the terminal device via serving cell configuration information.

[0137] In one implementation, the network device configures a transmission mode for each CC and each BWP through RRC signaling, and the BWP switching implicitly informs the terminal device to send and receive data or pilot signals based on the transmission mode associated with the BWP.

[0138] In another implementation, the network device configures multiple transmission modes for each CC and each BWP through RRC signaling, and dynamically activates one of the transmission modes for each BWP through the media access control control element (MAC-CE). After receiving the activation signaling, the terminal device switches the transmission mode and subsequently sends and receives data or pilot signals based on the new transmission mode after the switch.

[0139] Optionally, after receiving the BWP-level transmission mode activation signaling, the terminal device switches the transmission mode. After the switch is successful, it sends an acknowledgement (ACK) message to the network terminal device, so that the terminal device and the network device have a consistent understanding of the effective time of the new transmission mode (i.e., the second transmission mode).

[0140] In another implementation, the network device configures multiple transmission modes for each CC and each BWP through RRC signaling, dynamically activates multiple transmission modes for each BWP through MAC-CE, and selects one transmission mode from the multiple transmission modes activated by MAC-CE through DCI signaling and indicates it to the terminal device.

[0141] In another implementation, the network device configures multiple transmission modes for each CC through RRC signaling, dynamically activates one of the transmission modes for each CC through MAC-CE, and implements data or pilot transmission and reception scheduled by the CC based on the transmission mode.

[0142] Optionally, after receiving the CC-level transmission mode activation signaling, the terminal device switches the transmission mode, and after the switch is successful, sends ACK information to the network terminal device, so that the terminal device and the network device have a consistent understanding of the effective time of the new transmission mode.

[0143] In another implementation, the network device configures multiple transmission modes for each CC through RRC signaling, dynamically activates multiple transmission modes for each CC through MAC-CE, and selects one transmission mode from the multiple transmission modes activated by MAC-CE through DCI signaling and indicates it to the terminal device.

[0144] Optionally, after receiving the BWP-level or CC-level transmission mode activation signaling, the terminal device switches the transmission mode. After the switch is successful, it sends an acknowledgement (ACK) message to the network terminal device, so that the terminal device and the network device have a consistent understanding of the effective time of the new transmission mode (i.e., the second transmission mode).

[0145] Optionally, after receiving the BWP-level or CC-level transmission mode activation signaling, the terminal device switches the transmission mode. After the switch is successful, no information is sent to the network terminal device. The terminal device receives or sends signals based on the new transmission mode at a predetermined time, so that the terminal device and the network device have the same understanding of the effective time of the new transmission mode (i.e., the second transmission mode). For example, the activation signaling is received at time n, and the signal is received or sent based on the new transmission mode after time n+T; and the signal is received or sent based on the old transmission mode during the period between time n and time n+T, or any receiving and sending behavior of the terminal device is stopped during the period between time n and time n+T.

[0146] In some embodiments, the network device may send a transmission mode indication to the terminal device via SCell activation signaling.

[0147] In one implementation, the transmission mode indication is not explicitly carried in the SCell activation signaling. The terminal device implicitly obtains the new transmission mode indication information based on the working bandwidth after the SCell is activated, performs transmission mode switching and performs SCell activation, and after the SCell is successfully activated, performs data transmission and reception based on the indicated transmission mode. For example, if the downlink receiving bandwidth of the terminal device is 100M, the maximum number of PDSCH transmission streams that can be supported is 4 streams; if the downlink receiving bandwidth of the terminal device is 200M, the maximum number of PDSCH transmission streams that can be supported is 2 streams; at this time, when the terminal device only works in a single CC, the system bandwidth of the CC is 100M, and the number of ports used by the terminal device is 4; when the network device activates an auxiliary CC for the terminal device, and the system bandwidth of the auxiliary CC is 100M, after the terminal device receives the SCell activation signaling, it needs to switch from the transmission mode of "bandwidth 100M + port number 4" to the transmission mode of "bandwidth 200M + port number 2".

[0148] In another implementation, the transmission mode indication is carried in the SCell activation signaling, the terminal device performs SCell activation based on the indicated transmission mode, and after the SCell activation is successful, data is sent and received based on the indicated transmission mode.

[0149] Optionally, the SCell activation process includes implementing one or more of the following actions under the transmission mode indicated: transmission mode switching, beam measurement of the Scell ​​to be activated, channel state information measurement of the Scell ​​to be activated, beam measurement of an activated CC based on a new transmission mode, and channel state information measurement of an activated CC based on a new transmission mode.

[0150] Optionally, the SCell activation further includes reporting one or more of the following information based on the indicated transmission mode: measurement information of the Scell ​​to be activated, measurement information of the activated CC, and indication information that the transmission mode switching has been successful.

[0151] Optionally, the terminal device receives the SCell activation signaling sent by the network device at time n. If the network device receives valid channel state information of the SCell between time n+T1, it is considered that the SCell activation is successful and the transmission mode switching is successful; otherwise, it is considered that the SCell activation or transmission mode switching fails. The specific definition of T1 needs to take into account the processing time required for the terminal device to switch the transmission mode.

[0152] Optionally, if the transmission mode indicated by the terminal device is different from the transmission mode adopted before receiving the SCell activation signaling, and the transmission mode switching of the terminal device is unsuccessful, the SCell activation fails.

[0153] In some embodiments, the network device may send a transmission mode indication to the terminal device via SCell deactivation signaling.

[0154] In one implementation, the transmission mode indication is not explicitly carried in the SCell deactivation signaling. The terminal device implicitly obtains the new transmission mode indication information based on the working bandwidth after the SCell is deactivated, performs transmission mode switching and performs SCell deactivation, and after the SCell is successfully deactivated, performs data transmission and reception based on the indicated transmission mode. For example, if the downlink receiving bandwidth of the terminal device is 100M, the maximum number of PDSCH transmission streams that can be supported is 4 streams; if the downlink receiving bandwidth of the terminal device is 200M, the maximum number of PDSCH transmission streams that can be supported is 2 streams; at this time, when the terminal device only works in two CCs and the system bandwidth of each CC is 100M, the number of ports used by the terminal device is 2; when the network device deactivates an auxiliary CC for the terminal device, after the terminal device receives the SCell deactivation signaling, it needs to switch from the transmission mode of "bandwidth 200M + number of ports 2" to the transmission mode of "bandwidth 100M + number of ports 4".

[0155] In another implementation, the transmission mode indication is carried in the SCell deactivation signaling, the terminal device performs SCell deactivation based on the indicated transmission mode, and after the SCell deactivation is successful, data is sent and received based on the indicated transmission mode.

[0156] Optionally, if the transmission mode indicated by the terminal device is different from the transmission mode adopted before receiving the SCell activation signaling, and the terminal device transmission mode switch is unsuccessful, the SCell deactivation is considered successful, and the terminal device reports the information that the transmission mode switch was unsuccessful to the network device.

[0157] In some embodiments, the behavior of the terminal device performing transmission mode switching may include one or more of the following behaviors: changing the working port of the terminal device; changing the working bandwidth of the terminal device; or changing the baseband processing capability of the terminal device. For example, changing the working port of the terminal device includes switching from one port capability to another port capability, and changing the working bandwidth of the terminal device includes switching from one bandwidth capability to another bandwidth capability.

[0158] In some embodiments, before executing the transmission mode switching, the terminal device 120 may send a transmission mode switching request to the network device 110. Optionally, before performing the transmission mode switching, the terminal device may send a transmission mode switching request to the network device, and after the permission of the network device, the transmission mode switching is performed. Optionally, before performing the transmission mode switching, the terminal device may send a transmission mode switching request to the network device, and if the network device does not allow the terminal device to perform the transmission mode switching, the terminal device does not perform the transmission mode switching.

[0159] In some embodiments, the terminal device may send a transmission mode switching request via PRACH, or send a transmission mode switching request via PUSCH, or send a transmission mode switching request via PUCCH.

[0160] In some embodiments, the transmission mode switching request includes one or more of the following: an uplink resource request for reporting the second transmission mode, a reason for the terminal device to switch the transmission mode, an indication of the second transmission mode after switching, and a transmission mode switching protection interval. The above reasons for the transmission mode switching in the transmission mode switching request can be direct reasons or classified reasons, such as reasons on the terminal device side or reasons on the network device side.

[0161] In some embodiments, the triggering conditions for the terminal device to send a transmission mode switching request to the network device include one or more of the following: a change in the energy saving requirement of the terminal device, a change in the channel quality of the terminal device, a change in the service load of the network device, a change in the amount of service to be transmitted by the terminal device, or a change in the channel characteristics of the terminal device.

[0162] In some embodiments, after executing the transmission mode switch, the terminal device may send a transmission mode switched message to the network device, and the transmission mode switched message may include one or more of the following: whether the transmission mode switch is completed, the reason why the terminal device switches the transmission mode, and an indication of the second transmission mode after switching. The above reasons for the transmission mode switch in the transmission mode switched message may be direct reasons or classified reasons, such as reasons on the terminal device side or reasons on the network device side.

[0163] The above reference process 200 describes a scheme according to some embodiments of the present disclosure, through which the network device can dynamically change the transmission bandwidth and the number of transceiver antennas of the terminal device based on real-time business needs; when the business volume is small, the terminal device can achieve energy saving by closing some radio frequency channels or reducing the baseband signal processing requirements; when the main path is dominant and the business volume is large, high-capacity transmission is achieved by closing some antennas and increasing bandwidth transmission. The terminal device can save power consumption of the terminal device by dynamically closing some sending or receiving channels; the terminal device can also achieve higher-speed transmission by dynamically opening more sending or receiving channels, thereby improving the user-perceived rate.

[0164] Under normal circumstances, the maximum working bandwidth and the number of uplink and downlink antenna ports of the user are reported to the base station during the initial access phase. After the initial access is completed, the maximum working bandwidth and the number of uplink and downlink antenna ports of the user are fixed. According to the schemes of some embodiments of the present disclosure, the terminal device can dynamically switch the working bandwidth and change the number of uplink and downlink antenna ports under a fixed capability resource pool, thereby achieving the performance requirements of power consumption and capacity of the terminal device under different channel environments.

[0165] Figure 3 A schematic signaling diagram showing another communication process 300 according to some embodiments of the present disclosure, the process 300 may be Figure 2 An example implementation of process 200 is shown. Similar to process 200 , process 300 also involves network device 110 and terminal device 120 .

[0166] refer to Figure 3 In 301 , the terminal device 120 reports the capability information of the transmission mode, that is, the terminal device 120 reports the supported capability information to the network device 110 .

[0167] Optionally, the capability information may include parameter 1: whether the terminal device supports bandwidth capability and port capability sharing. The capability parameter is used to characterize whether the baseband processing capability of the terminal device can support switching between different bandwidths and different numbers of ports. For example, in one implementation, the terminal device reduces the number of transceiver ports and supports transmission with a larger bandwidth based on the saved processing capability; in another implementation, the terminal device reduces the transmission bandwidth and supports transmission with a larger number of ports based on the saved processing capability.

[0168] Optionally, the capability information may include parameter 2: the number of ports supported by the terminal device. This capability parameter may be used to characterize the number of SRS transmission ports, or the maximum number of MIMO streams for downlink PDSCH transmission, or the number of transmission ports for downlink channel state information-reference signal (CSIRS) transmission, or the maximum number of MIMO streams for PUSCH transmission, etc.

[0169] Optionally, the capability information may include parameter 3: bandwidth supported by the terminal device. This capability parameter may be used to characterize the maximum uplink transmission bandwidth of a single carrier, or the maximum downlink transmission bandwidth of a single carrier, or the uplink multi-carrier aggregation bandwidth, or the downlink multi-carrier aggregation bandwidth, or the number of downlink multi-carrier aggregations, or the number of uplink multi-carrier aggregations, or the maximum transmission bandwidth of the pilot signal, or the maximum transmission bandwidth of the data channel, etc.

[0170] Optionally, the capability information may include parameter 4: processing delay for switching between different transmission capabilities. This capability parameter may be used to characterize the processing time required for the terminal device to switch the working bandwidth, or the processing time required for the terminal device to switch the connection relationship between the RF chain and the physical antenna, or the processing time required for the terminal device to switch the number of ports, or the processing time required for the terminal device to reconstruct the baseband processing capability, etc.

[0171] Optionally, the capability information may include parameter 5: the capability conversion factor "a" between bandwidth and port. This capability parameter may be used to indicate that when the terminal device adjusts the bandwidth from A1 to A2, the number of supported ports may be adjusted from B1 to B2, and the value of B2 is related to "a", A1, A2, and B1; or when the terminal device adjusts the number of ports from A1 to A2, the supported bandwidth may be adjusted from B1 to B2, and the value of B2 is related to "a", A1, A2, and B1.

[0172] In some embodiments, the bandwidth may be the bandwidth of a single carrier, the bandwidth of multi-carrier aggregation, the downlink bandwidth, or the uplink bandwidth, etc. The port may be a pilot port, a data port, the number of downlink MIMO streams, the number of uplink MIMO streams, an antenna port, a transmitting port, a receiving port, a transmitting antenna port, or a receiving antenna port, etc. The connection relationship between the RF chain and the physical antenna of the terminal device may be an antenna structure using DBF, HBF, or analog beam forming (ABF), etc. The data channel may be one or more of the following signals: PUCCH, PDCCH, PUSCH, or PDSCH, etc. The pilot signal may be one or more of the following signals: CSIRS, synchronization signal and physical broadcast channel (PBCH) block (SSB), demodulation reference signal (DMRS), tracking reference signal (TRS), phase tracking reference signal (PTRS), SRS, cell reference signal (CRS), etc.

[0173] In some embodiments, the transmission capability parameter reported by the terminal device may be a combination of multiple parameters, or multiple values ​​of a parameter. Among them, multiple parameter combinations are a transmission capability, different transmission capabilities correspond to different values ​​of the same parameter combination, and the terminal device may report multiple values ​​of multiple parameter combinations to characterize the multiple transmission capabilities that the terminal device can support.

[0174] In some embodiments, the capability information of the transmission mode may be reported via RRC signaling, MAC-CE, uplink control information (UCI), PUCCH, and / or PUSCH.

[0175] Continue to refer Figure 3 At 302, the network device 110 sends a transmission mode indication to the terminal device 120. Specifically, the transmission mode is associated with the transmission capability parameter reported by the terminal device. For example, based on the transmission capability parameter value reported by the terminal device, the network terminal device determines the transmission mode that the terminal device can support, and based on the real-time scheduling requirements, decides the transmission mode to which the terminal device should switch.

[0176] In one implementation, the transmission mode is defined as different values ​​of the transmission capacity parameter. In this case, different values ​​of the same transmission capacity parameter correspond to different transmission modes, and different transmission capacity parameters correspond to different transmission modes. Table 2 shows an exemplary transmission mode table, in which different transmission modes correspond to different values ​​of the number of ports.

[0177] Table 2

[0178] Transmission Mode Transmission capability parameters Capability parameter values #1 Number of ports 4 #2 Number of ports 2

[0179] The terminal device reports the supported port capabilities and dynamically switches the number of ports for downlink reception or uplink transmission of the terminal device based on factors such as real-time business needs, channel environment characteristics, and terminal energy-saving needs.

[0180] Optionally, when the terminal device has sufficient power, transmission mode #1 is used to receive downlink data. At this time, the terminal device uses 4 antenna ports to receive downlink signals based on digital beamforming, hybrid beamforming, or analog beamforming, and the baseband needs to process the received signals of the 4 antenna ports; when the terminal device turns on the energy-saving mode, transmission mode #2 is used to receive downlink data. At this time, the terminal device uses 2 antenna ports to receive downlink signals based on digital beamforming, hybrid beamforming, or analog beamforming. The baseband needs to process the received signals of the 2 antenna ports, so some additional processing units can be turned off to save power consumption.

[0181] Optionally, the receiving or transmitting antenna sets used in transmission mode #1 and transmission mode #2 are the same, but the corresponding RF chains and antenna connection relationships are different. For example, the terminal device has 4 antennas and 4 RF chains; transmission mode #1 uses 4 RF chains to receive or send signals based on digital beamforming, where each RF chain is associated with 1 antenna; transmission mode #2 uses 2 RF chains to receive or send signals based on hybrid beamforming, where each RF chain is associated with 2 antennas.

[0182] Optionally, the receiving or transmitting antenna sets used by transmission mode #1 and transmission mode #2 are different, and the receiving or transmitting antenna set of transmission mode #2 is a subset of the receiving or transmitting antenna set of transmission mode #1. For example, the terminal device has 4 antennas and 4 RF chains, each RF chain is connected to an antenna, and transmission mode #1 uses 4 RF chains to receive or send signals based on digital beamforming; transmission mode #2 uses 2 RF chains among the 4 RF chains and the 2 antennas corresponding to the RF chains to receive or send signals based on digital beamforming;

[0183] Optionally, the connection relationship between the RF chain and the antenna may not be explicitly defined in the protocol text, but the connection relationship between the RF chain and the physical antenna may be implicitly described by the number of antenna ports. For example, when the maximum number of pilot resources for beam management reported by the terminal device (capability reporting parameter "maxNumberSRS-ResourcePerSet-BM") is greater than 1, it is considered that the connection relationship between the RF chain and the antenna of the terminal device is that one RF chain is associated with multiple physical antennas, and hybrid beamforming or analog beamforming can be used to receive or send signals.

[0184] In one implementation, the transmission mode is defined as different values ​​of the transmission capability parameter. In this case, different values ​​of the same transmission capability parameter correspond to different transmission modes, and different transmission capability parameters correspond to different transmission modes. Table 3 shows another exemplary transmission mode table, in which different transmission modes correspond to different values ​​of bandwidth.

[0185] Table 3

[0186] Transmission Mode Transmission capability parameters Capability parameter values #1 bandwidth 100MHz #2 bandwidth 200MHz

[0187] The terminal device reports the supported bandwidth capability and dynamically switches the downlink reception or uplink transmission bandwidth of the terminal device based on factors such as real-time business requirements, channel environment characteristics, and terminal energy-saving requirements.

[0188] Optionally, when the terminal device has sufficient power, transmission mode #2 in Table 2 is used to receive downlink data. At this time, the antenna port's ability to receive or send signal bandwidth needs to be adjusted to be greater than or equal to 200MHz, and the baseband signal processing capability needs to be adjusted to support data reception, channel estimation, data demodulation, decoding and other operations corresponding to the 200MHz bandwidth; when the terminal device turns on the energy-saving mode, transmission mode #1 in Table 2 is used. At this time, the antenna port only needs to have a signal receiving capability of 100MHz, and the baseband only needs to process data reception, channel estimation, data demodulation, decoding and other operations corresponding to the 100MHz bandwidth. Therefore, some additional processing units can be turned off to achieve the purpose of saving power.

[0189] Optionally, the terminal device uses the same set of receiving or transmitting antenna ports in different transmission modes, but the number of receiving or transmitting antenna ports corresponding to the same bandwidth in different transmission modes is different, and the network device does not need to perceive that the number of receiving or transmitting antenna ports corresponding to the same bandwidth in different transmission modes is different. For example, the terminal device has 4 antenna ports, and the signal receiving bandwidth capability of each antenna port is 100MHz in transmission mode #1 and transmission mode #2; transmission mode #1 uses 4 antenna ports to receive or transmit signals with a bandwidth of 100MHz, wherein all antenna ports receive or transmit the same 100MHz bandwidth; transmission mode #1 uses 4 antenna ports to receive or transmit signals with a bandwidth of 100MHz, wherein antenna port #1 and antenna port #2 receive or transmit the same 100MHz bandwidth, antenna port #3 and antenna port #4 receive or transmit the same 100MHz bandwidth, and antenna port #1 and antenna port #3 receive or transmit different 100MHz bandwidths.

[0190] Optionally, the number of receiving or transmitting antenna ports used by transmission mode #1 and transmission mode #2 is different, and the receiving or transmitting antenna ports used by transmission mode #2 are a subset of the receiving or transmitting antenna ports used by transmission mode #1. For example, the terminal device has 4 antenna ports, and the signal receiving or transmitting bandwidth capacity of each antenna port is 200MHz; transmission mode #1 uses 4 antenna ports to receive or transmit the same 100MHz bandwidth; transmission mode #2 uses 2 antenna ports of the 4 antenna ports to receive or transmit the same 200MHz bandwidth;

[0191] Optionally, the receiving or transmitting antenna sets used in transmission mode #1 and transmission mode #2 are the same, but the corresponding RF chains and antenna connection relationships are different. For example, the terminal device has 4 physical antennas and 4 RF chains; transmission mode #1 uses 4 RF chains, each of which receives or sends the same 100MHz bandwidth signal based on digital beamforming, where each RF chain is associated with 1 antenna; transmission mode #2 uses 2 RF chains, each of which receives or sends the same 200MHz bandwidth signal based on hybrid beamforming, where each RF chain is associated with 2 physical antennas.

[0192] Optionally, the receiving or transmitting antenna sets used by transmission mode #1 and transmission mode #2 are different, and the receiving or transmitting antenna set of transmission mode #2 is a subset of the receiving or transmitting antenna set of transmission mode #1. For example, the terminal device has 4 antennas and 4 RF chains, each RF chain is connected to an antenna, and the signal receiving or transmitting bandwidth capability of each RF chain is 200MHz; transmission mode #1 uses 4 RF chains to receive or transmit the same 100MHz bandwidth signal based on digital beamforming; transmission mode #2 uses 2 of the 4 RF chains and the 2 antennas corresponding to the RF chains to receive or transmit the same 200MHz bandwidth signal based on digital beamforming;

[0193] Optionally, the connection relationship between the RF chain and the physical antenna may not be explicitly defined in the protocol text, but the connection relationship between the RF chain and the physical antenna may be implicitly described by the number of antenna ports. For example, when the maximum number of pilot resources for beam management reported by the terminal device (capability reporting parameter "maxNumberSRS-ResourcePerSet-BM") is greater than 1, it is considered that the connection relationship between the RF chain and the physical antenna of the terminal device is that one RF chain is associated with multiple physical antennas, and hybrid beamforming or analog beamforming can be used to receive or send signals.

[0194] In one implementation, the transmission mode is defined as different values ​​of multiple transmission capability parameter combinations, and each transmission mode corresponds to the same capability parameter combination, but at least one parameter value is different. Table 4 shows another exemplary transmission mode table, in which different transmission modes correspond to different values ​​of the number of ports and bandwidth combinations.

[0195] Table 4

[0196] Transmission Mode Number of ports bandwidth #1 4 100MHz #2 4 200MHz #3 8 50MHz #4 2 400MHz

[0197] Optionally, when the terminal device channel environment is multipath-rich and the network service load is large, the transmission bandwidth that can be allocated to each user is limited. At this time, more port services can be used to increase the number of user air interface transmission flows, thereby improving the user perceived rate. For example, transmission mode #3 in Table 3 can be used for downlink data reception. When the terminal device channel environment is dominated by the main path and the network service load is small, the transmission bandwidth that can be allocated to each user is not limited. At this time, the number of service ports can be reduced and a larger bandwidth can be used to transmit data to the user. For example, transmission mode #4 in Table 3 can be used for downlink data reception.

[0198] Optionally, different transmission modes use different sets of receiving or transmitting antenna ports, and the receiving or transmitting bandwidth of a certain transmission mode is only a subset of the receiving or transmitting bandwidth of another transmission mode, or the receiving or transmitting antenna port of a certain transmission mode is only a subset of the receiving or transmitting antenna port of another transmission mode. For example, the terminal device has 8 antenna ports, and the signal receiving or transmitting bandwidth capability of each antenna port is 400MHz; transmission mode #1 uses 4 of the 8 antenna ports to receive or transmit the same 100MHz bandwidth signal; transmission mode #2 uses 4 of the 8 antenna ports to receive or transmit the same 200MHz bandwidth signal; transmission mode #3 uses 8 antenna ports to receive or transmit the same 50MHz bandwidth signal; transmission mode #4 uses 2 of the 8 antenna ports to receive or transmit the same 50MHz bandwidth signal;

[0199] Optionally, the receiving or transmitting antenna port sets used in different transmission modes are the same. For example, the terminal device has 8 antenna ports, and the signal receiving or transmitting bandwidth capability of each antenna port is 100MHz; transmission mode #1 uses antenna port #1, antenna port #2, antenna port #3 and antenna port #4 to receive or transmit the first 50MHz bandwidth signal, and uses antenna port #5, antenna port #6, antenna port #7 and antenna port #8 to receive or transmit the second 50MHz bandwidth signal; transmission mode #2 uses antenna port #1, antenna port #2, antenna port #3 and antenna port #4 to receive or transmit the first 100MHz bandwidth signal, and uses antenna port #5, antenna port #6, antenna port #7 and antenna port #8 to receive or transmit the second 50MHz bandwidth signal. 6. Antenna port #7 and antenna port #8 receive or send the second 100 MHz bandwidth signal; transmission mode #3 uses 8 antenna ports to receive or send the same 50 MHz bandwidth signal; transmission mode #4 uses antenna port #1 and antenna port #2 to receive or send the first 100 MHz bandwidth signal, uses antenna port #3 and antenna port #4 to receive or send the second 100 MHz bandwidth signal, uses antenna port #4 and antenna port #5 to receive or send the third 100 MHz bandwidth signal, and uses antenna port #6 and antenna port #7 to receive or send the fourth 100 MHz bandwidth signal.

[0200] Optionally, the receiving or transmitting antenna sets used in different transmission modes are the same, but the corresponding RF chains and antenna connection relationships are different. For example, the terminal device has 8 antennas and 8 RF chains; transmission mode #1 uses 4 RF chains, each RF chain receives or sends the same 100MHz bandwidth signal based on analog beamforming, where each RF chain is associated with 2 antennas; transmission mode #2 uses 4 RF chains, each RF chain receives or sends the same 200MHz bandwidth signal based on hybrid beamforming, where each RF chain is associated with 2 antennas. Transmission mode #3 uses 8 RF chains to receive or send the same 200MHz bandwidth signal, where each RF chain is associated with 1 antenna. Transmission mode #4 uses 2 RF chains to receive or send the same 400MHz bandwidth signal, where each RF chain is associated with 4 antennas.

[0201] Optionally, different transmission modes use different sets of receiving or transmitting antennas, and the receiving or transmitting antennas of a certain transmission mode are only a subset of the receiving or transmitting antennas of another transmission mode. For example, the terminal device has 8 antennas and 8 RF chains, each RF chain is connected to an antenna, and the signal receiving or transmitting bandwidth capability of each RF chain is 400MHz; transmission mode #1 uses 4 RF chains of the 8 RF chains and the associated antennas to receive or transmit the same 100MHz bandwidth signal; transmission mode #3 uses 8 RF chains and the associated antennas to receive or transmit the same 50MHz bandwidth signal;

[0202] Optionally, the connection relationship between the RF chain and the physical antenna may not be explicitly defined in the protocol text, but the connection relationship between the RF chain and the physical antenna may be implicitly described by the number of antenna ports. For example, when the maximum number of pilot resources for beam management reported by the terminal device (capability reporting parameter "maxNumberSRS-ResourcePerSet-BM") is greater than 1, it is considered that the connection relationship between the RF chain and the physical antenna of the terminal device is that one RF chain is associated with multiple physical antennas, and hybrid beamforming or analog beamforming can be used to receive or send signals.

[0203] Optionally, the receiving or transmitting physical antenna sets used by transmission mode #1, transmission mode #2, transmission mode #3, and transmission mode #4 are the same, except for the connection relationship between the corresponding RF chains and the physical antennas. For example, the terminal device has 8 physical antennas, and transmission mode #1 and transmission mode #2 use hybrid beamforming, and each RF chain is associated with 2 physical antennas; transmission mode #3 uses digital beamforming, and each RF chain is associated with 1 physical antenna; transmission mode #4 uses hybrid beamforming, and each RF chain is associated with 4 physical antennas.

[0204] Optionally, the correspondence between the antenna port and the RF chain may be that one antenna port corresponds to multiple RF chains, or one antenna port corresponds to one RF chain, or multiple antenna ports correspond to the same one or more RF chains, or different antenna ports correspond to the same RF chain, or different antenna ports correspond to the same RF chain parts; the correspondence between the antenna port and the antenna may be that one antenna port corresponds to multiple antennas, or one antenna port corresponds to one antenna, or different antenna ports correspond to the same antenna set, or different antenna ports correspond to the same antenna parts; the correspondence between the RF chain and the antenna may be that one RF chain corresponds to one antenna, or one RF chain corresponds to multiple antennas, or different RF chains correspond to the same antenna set, or different RF chains correspond to the same antenna parts.

[0205] Optionally, the transmission mode can be further divided into a downlink transmission mode and an uplink transmission mode. The downlink transmission mode is used to indicate the downlink receiving behavior of the terminal device, and the uplink transmission mode is used to indicate the uplink sending behavior of the terminal device. Optionally, the uplink transmission mode and the downlink transmission mode can be a set combined together or defined separately.

[0206] In some embodiments, the triggering event for the network device to send a transmission mode indication may include one or more of the following events: Event 1, after the terminal device successfully accesses the initial access, the network device configures a default transmission mode for it; Event 2, the network device decides to switch the transmission mode of the terminal device based on the real-time service scheduling requirements, that is, switching from one transmission mode to another transmission mode; Event 3, the network device decides to switch the transmission mode of the terminal device based on the reported information of the terminal device (for example, the terminal device reports that the battery is insufficient and the energy-saving mode needs to be turned on), that is, switching from one transmission mode to another transmission mode; Event 4, the network device decides to switch the transmission mode of the terminal device based on the channel environment of the terminal device (for example, rich multipath, using the most ports to achieve higher flow number transmission; main path is dominant, using fewer ports and low flow number transmission), that is, switching from one transmission mode to another transmission mode.

[0207] The following describes in detail the manner in which the network device sends a transmission mode indication.

[0208] In one implementation, the network device configures a transmission mode for each CC and each BWP through RRC signaling, and the BWP switching implicitly informs the terminal device to send and receive data or pilot signals based on the transmission mode associated with the BWP.

[0209] In another implementation, the network device configures multiple transmission modes for each CC and each BWP through RRC signaling, and dynamically activates one of the transmission modes for each BWP through MAC-CE. After receiving the activation signaling, the terminal device switches the transmission mode, and subsequently sends and receives data or pilot signals based on the new transmission mode after the switch.

[0210] Optionally, after receiving the BWP-level transmission mode activation signaling, the terminal device switches the transmission mode, and after the switch is successful, sends ACK information to the network terminal device, so that the terminal device and the network device have a consistent understanding of the effective time of the new transmission mode.

[0211] In another implementation, the network device configures multiple transmission modes for each CC and each BWP through RRC signaling, dynamically activates multiple transmission modes for each BWP through MAC-CE, and selects one transmission mode from the multiple transmission modes activated by MAC-CE through DCI signaling and indicates it to the terminal device.

[0212] In another implementation, the network device configures multiple transmission modes for each CC through RRC signaling, dynamically activates one of the transmission modes for each CC through MAC-CE, and implements data or pilot transmission and reception scheduled by the CC based on the transmission mode.

[0213] Optionally, after receiving the CC-level transmission mode activation signaling, the terminal device switches the transmission mode, and after the switch is successful, sends ACK information to the network terminal device, so that the terminal device and the network device have a consistent understanding of the effective time of the new transmission mode.

[0214] In another implementation, the network device configures multiple transmission modes for each CC through RRC signaling, dynamically activates multiple transmission modes for each CC through MAC-CE, and selects one transmission mode from the multiple transmission modes activated by MAC-CE through DCI signaling and indicates it to the terminal device.

[0215] Optionally, after receiving the BWP-level or CC-level transmission mode activation signaling, the terminal device switches the transmission mode. After the switch is successful, it sends an acknowledgement (ACK) message to the network terminal device, so that the terminal device and the network device have a consistent understanding of the effective time of the new transmission mode (i.e., the second transmission mode).

[0216] Optionally, after receiving the BWP-level or CC-level transmission mode activation signaling, the terminal device switches the transmission mode. After the switch is successful, no information is sent to the network terminal device. The terminal device receives or sends signals based on the new transmission mode at a predetermined time, so that the terminal device and the network device have the same understanding of the effective time of the new transmission mode (i.e., the second transmission mode). For example, the activation signaling is received at time n, and the signal is received or sent based on the new transmission mode after time n+T; and the signal is received or sent based on the old transmission mode during the period between time n and time n+T, or any receiving and sending behavior of the terminal device is stopped during the period between time n and time n+T.

[0217] In another implementation, the transmission mode indication is carried in the SCell activation signaling, the terminal device performs SCell activation based on the indicated transmission mode, and after the SCell activation is successful, data is sent and received based on the indicated transmission mode.

[0218] In another implementation, the transmission mode indication is not explicitly carried in the SCell activation signaling. The terminal device implicitly obtains the new transmission mode indication information based on the working bandwidth after the SCell is activated, switches the transmission mode and performs SCell activation. After the SCell is successfully activated, data is sent and received based on the indicated transmission mode. For example, if the downlink receiving bandwidth of the terminal device is 100M, the maximum number of PDSCH transmission streams that can be supported is 4 streams; if the downlink receiving bandwidth of the terminal device is 200M, the maximum number of PDSCH transmission streams that can be supported is 2 streams; at this time, when the terminal device only works in a single CC, the system bandwidth of the CC is 100M, and the number of ports used by the terminal device is 4; when the network device activates an auxiliary CC for the terminal device, and the system bandwidth of the auxiliary CC is 100M, after the terminal device receives the SCell activation signaling, it needs to switch from the transmission mode of "bandwidth 100M + port number 4" to the transmission mode of "bandwidth 200M + port number 2".

[0219] Optionally, the SCell activation process includes implementing one or more of the following actions under the transmission mode indicated: transmission mode switching, beam measurement of the Scell ​​to be activated, channel state information measurement of the Scell ​​to be activated, beam measurement of an activated CC based on a new transmission mode, and channel state information measurement of an activated CC based on a new transmission mode.

[0220] Optionally, the SCell activation further includes reporting one or more of the following information based on the indicated transmission mode: measurement information of the Scell ​​to be activated, measurement information of the activated CC, and indication information that the transmission mode switching has been successful.

[0221] Optionally, the terminal device receives the SCell activation signaling sent by the network device at time n. If the network device receives valid channel state information of the SCell between time n+T1, it is considered that the SCell activation is successful and the transmission mode switching is successful; otherwise, it is considered that the SCell activation or transmission mode switching fails. The specific definition of T1 needs to take into account the processing time required for the terminal device to switch the transmission mode.

[0222] Optionally, if the transmission mode indicated by the terminal device is different from the transmission mode adopted before receiving the SCell activation signaling, and the transmission mode switching of the terminal device is unsuccessful, the SCell activation fails.

[0223] In another implementation, the transmission mode indication is not explicitly carried in the SCell deactivation signaling. The terminal device implicitly obtains the new transmission mode indication information based on the working bandwidth after the SCell is deactivated, switches the transmission mode and performs SCell deactivation. After the SCell is successfully deactivated, data is sent and received based on the indicated transmission mode. For example, if the downlink receiving bandwidth of the terminal device is 100M, the maximum number of PDSCH transmission streams that can be supported is 4 streams; if the downlink receiving bandwidth of the terminal device is 200M, the maximum number of PDSCH transmission streams that can be supported is 2 streams; at this time, when the terminal device only works in two CCs and the system bandwidth of each CC is 100M, the number of ports used by the terminal device is 2; when the network device deactivates an auxiliary CC for the terminal device, the terminal device needs to switch from the transmission mode of "bandwidth 200M + number of ports 2" to the transmission mode of "bandwidth 100M + number of ports 4" after receiving the SCell deactivation signaling.

[0224] In another implementation, the transmission mode indication is carried in the SCell deactivation signaling, the terminal device performs SCell deactivation based on the indicated transmission mode, and after the SCell deactivation is successful, data is sent and received based on the indicated transmission mode.

[0225] Optionally, if the transmission mode indicated by the terminal device is different from the transmission mode adopted before receiving the SCell activation signaling, and the terminal device transmission mode switch is unsuccessful, the SCell deactivation is considered successful, and the terminal device reports the information that the transmission mode switch was unsuccessful to the network device.

[0226] Continue to refer Figure 3 , at 303, the terminal device switches the transmission mode.

[0227] In some embodiments, the transmission mode switching may include one or more of the following actions: changing the working port of the terminal device; changing the working bandwidth of the terminal device; or changing the baseband processing capability of the terminal device. Changing the working port of the terminal device includes switching from one port capability to another port capability, and changing the working bandwidth of the terminal device includes switching from one bandwidth capability to another bandwidth capability. For example, when the transmission mode is as shown in Table 2 or Table 4, the transmission mode switching of the terminal device may include changing the working port of the terminal device, for example, switching from a port capability of 4 ports using digital beamforming to a port capability of 2 ports using hybrid beamforming. When the transmission mode is as shown in Table 3 or Table 4, the transmission mode switching of the terminal device may include changing the working bandwidth of the terminal device, for example, switching from a bandwidth capability of 100MHz with one carrier to a bandwidth capability of 200MHz under aggregation of 2 carriers. Before the switching, the terminal works in a single carrier mode, that is, it can only receive or send data on one carrier, and after the switching, the terminal works in a multi-carrier mode, that is, it can simultaneously receive or send data on 2 carriers; or the bandwidth capability of 100MHz with one carrier is switched to a bandwidth capability of 50MHz with one carrier. In some embodiments, changing the baseband processing capability of the terminal device includes comprehensively switching the port capability and bandwidth capability of the terminal device.

[0228] The following specifically introduces the transmission mode switching behavior that the terminal device can perform. In some embodiments, the transmission mode switching behavior may include changing the sending or receiving behavior of the RF on the terminal device side, including one or more of the following behaviors: closing part of the RF receiving channel, closing part of the RF transmitting channel, opening part of the RF transmitting channel, opening part of the RF receiving channel, adjusting the working bandwidth of one or more RF channels, or adjusting the working frequency of one or more RF channels, etc.

[0229] In some embodiments, the transmission mode switching behavior may include changing the set of antennas used for receiving or transmitting on the terminal device side, including one or more of the following behaviors: turning off some receiving antennas, turning off some transmitting antennas, turning on some transmitting antennas, or turning on some receiving antennas, etc.

[0230] In some embodiments, the transmission mode switching behavior may include changing the association relationship between the antenna of the terminal device and the medium RF channel, including one or more of the following behaviors: switching the connection between X1 antennas and Y1 RF chains to X1 antennas and Y2 RF chains, switching the connection between X1 antennas and Y1 RF chains to X2 antennas and Y1 RF chains, etc., where X1, X2, Y1, and Y2 are positive integers.

[0231] In some embodiments, the transmission mode switching behavior may include changing the mapping relationship between the antenna port of the terminal device and the physical antenna, including one or more of the following behaviors: switching the mapping relationship of one antenna port to multiple physical antennas to mapping one antenna port to one physical antenna, or switching the mapping of one antenna port to one physical antenna to mapping one antenna port to multiple physical antennas, etc.

[0232] Optionally, the transmission mode switching behavior also includes the terminal device reporting transmission mode switching success indication information to the network device after completing the transmission mode switching.

[0233] Optionally, the transmission mode switching behavior may also include reporting transmission mode switching failure indication information to the network device when the terminal device fails to successfully switch the transmission mode. Optionally, the reason for the unsuccessful transmission mode switching may also be reported to the network device.

[0234] Optionally, after receiving the transmission mode switching signaling, the terminal device needs to complete the transmission mode switching within an agreed time, which is related to the switching delay of different transmission capabilities reported by the terminal device and / or the signaling demodulation processing delay.

[0235] Optionally, if the network device does not receive a transmission mode switching success indication within the agreed time, it is considered that the terminal device transmission mode switching is unsuccessful and that the terminal device will transmit in the transmission mode adopted before the switching.

[0236] Optionally, when the terminal device switches the transmission mode, it is necessary to interrupt the uplink and downlink data transmission and reception.

[0237] After the transmission mode is switched, the terminal device 120 and the network device 110 may perform uplink and downlink data transmission based on the new transmission mode after the switch at 304. For example, the terminal device receives downlink signals and / or sends uplink data based on the indicated transmission mode.

[0238] Optionally, uplink data transmission includes the terminal device notifying the network device that the transmission mode switching has been successfully completed.

[0239] Optionally, the uplink data transmission includes channel state information measurement results based on the new transmission mode, including one or more of the following information: channel state information (CSI), precoding matrix indication (PMI), channel rank indicator (RI), channel quality indicator (CQI), and signal to interference plus noise ratio (SINR).

[0240] The above reference process 300 describes a scheme according to some embodiments of the present disclosure, through which the network device can dynamically change the transmission bandwidth and the number of transceiver antennas of the terminal device based on real-time business needs; when the business volume is small, energy saving of the terminal device is achieved by shutting down some antennas or reducing the baseband bandwidth processing requirements; when the main path is dominant and the business volume is large, high-capacity transmission is achieved by shutting down some antennas and increasing bandwidth transmission.

[0241] Figure 4 A schematic signaling diagram showing another communication process 400 according to some embodiments of the present disclosure, the process 400 may be Figure 2 An example implementation of process 200 is shown. Similar to process 200 , process 400 also involves network device 110 and terminal device 120 .

[0242] refer to Figure 4 In 401 , the terminal device 120 reports the capability information of the transmission mode, that is, the terminal device 120 reports the supported capability information to the network device 110 .

[0243] Optionally, the capability information may include parameter 1: whether the terminal device supports bandwidth capability and port capability sharing. The capability parameter is used to characterize whether the baseband processing capability of the terminal device can support switching between different bandwidths and different numbers of ports. For example, in one implementation, the terminal device reduces the number of transceiver ports and supports transmission with a larger bandwidth based on the saved processing capability; in another implementation, the terminal device reduces the transmission bandwidth and supports transmission with a larger number of ports based on the saved processing capability.

[0244] Optionally, the capability information may include parameter 2: the number of ports supported by the terminal device. This capability parameter may be used to characterize the number of SRS transmission ports, or the maximum number of MIMO streams for downlink PDSCH transmission, or the number of transmission ports for downlink CSIRS transmission, or the maximum number of MIMO streams for PUSCH transmission, etc.

[0245] Optionally, the capability information may include parameter 3: bandwidth supported by the terminal device. This capability parameter may be used to characterize the maximum uplink transmission bandwidth of a single carrier, or the maximum downlink transmission bandwidth of a single carrier, or the uplink multi-carrier aggregation bandwidth, or the downlink multi-carrier aggregation bandwidth, or the number of downlink multi-carrier aggregations, or the number of uplink multi-carrier aggregations, or the maximum transmission bandwidth of the pilot signal, or the maximum transmission bandwidth of the data channel, etc.

[0246] Optionally, the capability information may include parameter 4: processing delay for switching between different transmission capabilities. This capability parameter may be used to characterize the processing time required for the terminal device to switch the working bandwidth, or the processing time required for the terminal device to switch the connection relationship between the RF chain and the physical antenna, or the processing time required for the terminal device to switch the number of ports, or the processing time required for the terminal device to reconstruct the baseband processing capability, etc.

[0247] Optionally, the capability information may include parameter 5: the capability conversion factor "a" between bandwidth and port. This capability parameter may be used to indicate that when the terminal device adjusts the bandwidth from A1 to A2, the number of supported ports may be adjusted from B1 to B2, and the value of B2 is related to "a", A1, A2, and B1; or when the terminal device adjusts the number of ports from A1 to A2, the supported bandwidth may be adjusted from B1 to B2, and the value of B2 is related to "a", A1, A2, and B1.

[0248] In some embodiments, the bandwidth may be the bandwidth of a single carrier, the bandwidth of multi-carrier aggregation, the downlink bandwidth, or the uplink bandwidth, etc. The port may be a pilot port, a data port, the number of downlink MIMO streams, the number of uplink MIMO streams, an antenna port, a transmitting port, a receiving port, a transmitting antenna port, or a receiving antenna port, etc. The connection relationship between the RF chain and the physical antenna may be an antenna structure such as DBF, HBF, or ABF. The data channel may be one or more of the following signals: PUCCH, PDCCH, PUSCH, or PDSCH, etc. The pilot signal may be one or more of the following signals: CSIRS, SSB, DMRS, TRS, PTRS, SRS, CRS, etc.

[0249] In some embodiments, the transmission capability parameter reported by the terminal device may be a combination of multiple parameters, or multiple values ​​of a parameter. Among them, multiple parameter combinations are a transmission capability, different transmission capabilities correspond to different values ​​of the same parameter combination, and the terminal device may report multiple values ​​of multiple parameter combinations to characterize the multiple transmission capabilities that the terminal device can support.

[0250] In some embodiments, the capability information of the transmission mode may be reported via RRC signaling, MAC-CE, UCI, PUCCH, and / or PUSCH.

[0251] Continue to refer Figure 4In 402, the terminal device switches the transmission mode. Different from process 300, in process 400, the terminal device can make a decision to switch the transmission mode by itself, without relying on the transmission mode indication of the network device. For example, the terminal device can decide to switch the transmission mode based on business requirements or power consumption requirements.

[0252] In some embodiments, the transmission mode switching may include one or more of the following actions: changing the working port of the terminal device; changing the working bandwidth of the terminal device; or changing the baseband processing capability of the terminal device. Changing the working port of the terminal device includes switching from one port capability to another port capability, and changing the working bandwidth of the terminal device includes switching from one bandwidth capability to another bandwidth capability. For example, when the transmission mode is as shown in Table 2 or Table 4, the transmission mode switching of the terminal device may include changing the working port of the terminal device, for example, switching from a port capability of 4 ports using digital beamforming to a port capability of 2 ports using hybrid beamforming. When the transmission mode is as shown in Table 3 or Table 4, the transmission mode switching of the terminal device may include changing the working bandwidth of the terminal device, for example, switching from a bandwidth capability of 100MHz with one carrier to a bandwidth capability of 200MHz under aggregation of 2 carriers. Before the switching, the terminal works in a single carrier mode, that is, it can only receive or send data on one carrier, and after the switching, the terminal works in a multi-carrier mode, that is, it can simultaneously receive or send data on 2 carriers; or the bandwidth capability of 100MHz with one carrier is switched to a bandwidth capability of 50MHz with one carrier. In some embodiments, changing the baseband processing capability of the terminal device includes comprehensively switching the port capability and bandwidth capability of the terminal device.

[0253] The following specifically introduces the transmission mode switching behavior that the terminal device can perform. In some embodiments, the transmission mode switching behavior may include changing the sending or receiving behavior of the RF on the terminal device side, including one or more of the following behaviors: closing part of the RF receiving channel, closing part of the RF transmitting channel, opening part of the RF transmitting channel, opening part of the RF receiving channel, adjusting the working bandwidth of one or more RF channels, or adjusting the working frequency of one or more RF channels, etc.

[0254] In some embodiments, the transmission mode switching behavior may include changing the set of antennas used for receiving or transmitting on the terminal device side, including one or more of the following behaviors: turning off some receiving antennas, turning off some transmitting antennas, turning on some transmitting antennas, or turning on some receiving antennas, etc.

[0255] In some embodiments, the transmission mode switching behavior may include changing the association relationship between the antenna and the medium RF channel of the terminal device, including one or more of the following behaviors: switching the connection between X1 antennas and Y1 medium RF channels to X1 antennas and Y2 medium RF channels, switching the connection between X1 antennas and Y1 medium RF channels to X2 antennas and Y1 medium RF channels, etc., where X1, X2, Y1, and Y2 are positive integers.

[0256] In some embodiments, the transmission mode switching behavior may include changing the mapping relationship between the antenna port of the terminal device and the physical antenna, including one or more of the following behaviors: switching the mapping relationship of one antenna port to multiple physical antennas to mapping one antenna port to one physical antenna, or switching the mapping of one antenna port to one physical antenna to mapping one antenna port to multiple physical antennas, etc.

[0257] Optionally, before the terminal device switches the transmission mode, a pilot measurement can be performed, which is used to guide the terminal device to select which transmission mode to send and receive signals. The pilot can reuse existing pilot signals, such as SSB, CSIRS, DMRS, PTRS, TRS, etc.; or a new dedicated pilot can be defined to specifically guide the terminal device to select a transmission mode.

[0258] Optionally, before switching the transmission mode, the terminal device may send a transmission mode switching request to the network device, and after the network device allows, the transmission mode switching is performed.

[0259] Optionally, before switching the transmission mode, the terminal device may send a transmission mode switching request to the network device. If the network device does not allow the terminal device to switch the transmission mode, the terminal device does not switch the transmission mode.

[0260] Continue to refer Figure 4 , in 403, the terminal device reports the transmission mode switch to the network device.

[0261] In one implementation, the terminal device reports a transmission mode switching message to the network device, and the reported content includes one or more of the following: informing the network device that the transmission mode of the terminal device has been switched, informing the network device what the new transmission mode is, informing the network device of the channel state information measurement results obtained based on the new transmission mode, and informing the network device of the reason for the transmission mode switching.

[0262] The following describes in detail the manner in which the terminal device reports the transmission mode switch. In one implementation, the terminal device sends a PRACH message, which implicitly informs the network device that the terminal device has switched its transmission mode. Specifically, the network device configures a PRACH sequence and / or a PRACH resource set for the terminal device through RRC signaling. The PRACH set is specifically used for sending transmission mode switching messages of the terminal device, that is, after the transmission mode of the terminal device switches, the PRACH sequence and / or PRACH resources pre-allocated by the network device are used to send a PRACH signal. After the network device receives the signal, it is considered that the terminal device has switched its transmission mode.

[0263] In another implementation, the terminal device sends a reporting request, the network device allocates uplink resources to the terminal device, and the terminal device reports a transmission mode switching message to the network device based on the allocated uplink resources. Specifically, the terminal device can apply for uplink resources from the network device through one or more of the following methods: sending a PRACH signal; sending a scheduling request message; defining a new MAC-CE message for carrying a transmission mode switching message report; defining a new UCI message for carrying a transmission mode switching message report.

[0264] The above reference process 400 describes a scheme according to some embodiments of the present disclosure, through which the terminal device can save power consumption of the terminal device by dynamically closing some sending or receiving channels; the terminal device can also achieve higher-speed transmission by dynamically opening more sending or receiving channels, thereby improving the user-perceived rate.

[0265] According to some embodiments of the present disclosure, terminal device transmission modes are defined, and dynamic switching between different transmission modes can be performed. In some embodiments, transmission mode capability parameters are defined, and multiple capability parameters are combined into one transmission mode, such as: pilot port, working bandwidth; number of MIMO streams, working bandwidth; pilot port, number of MIMO streams, working bandwidth; etc. The terminal device can report capability information of one or more transmission modes. In some embodiments, the scheme of the present disclosure supports dynamic switching between different transmission modes. For example: the network device can decide whether the terminal device switches the transmission mode and sends a transmission mode switching indication; or the terminal device decides whether to switch the transmission mode and reports the network device transmission mode switching indication. In some embodiments, transmission mode switching behaviors are defined, including: changing the sending or receiving behavior of the radio frequency on the terminal device side; changing the set of antennas used for receiving or sending on the terminal device side; changing the association between the antenna of the terminal device and the radio frequency channel, etc.

[0266] In the current protocol, the terminal device reports the maximum supported working bandwidth and the maximum supported number of MIMO streams. When the transmission bandwidth or the number of MIMO streams of the terminal device is not fully used at the current moment, the baseband processing capacity of the terminal device will be saved. Through the solutions of some embodiments of the present disclosure, the saved baseband processing capacity of the terminal device can be used to support a larger transmission bandwidth or a higher number of MIMO streams, thereby improving user capacity.

[0267] Figure 5 A flow chart of a communication process 500 according to some embodiments of the present disclosure is shown. The communication process 500 may be performed in a Figures 1A to 4 It is implemented at the terminal device 120 shown.

[0268] refer to Figure 5 , at 510 , the terminal device 120 receives or sends a signal based on a first transmission mode, where the first transmission mode corresponds to a first port capability and / or a first bandwidth capability.

[0269] At 520, the terminal device 120 performs a transmission mode switch from the first transmission mode to the second transmission mode, wherein the second transmission mode corresponds to the second port capability and / or the second bandwidth capability. At 530, the terminal device 120 receives or sends a signal based on the second transmission mode.

[0270] In some embodiments, the first port capability and the second port capability include at least one of the following: the number of pilot ports, the number of data ports, the number of pilot streams, the number of data channel streams, the number of transmitting antenna ports, the number of receiving antenna ports, the number of transmitting ports, the number of receiving ports, and the connection relationship between the RF chain and the antenna.

[0271] In some embodiments, the first bandwidth capability and the second bandwidth capability include at least one of the following: single carrier bandwidth, multi-carrier aggregation bandwidth, multi-carrier aggregation number, pilot signal bandwidth, data channel bandwidth, uplink bandwidth, downlink bandwidth, and RF chain operating bandwidth.

[0272] In some embodiments, when the first port capability is greater than or equal to the second port capability, the first bandwidth capability is less than or equal to the second bandwidth capability; or when the first bandwidth capability is greater than or equal to the second bandwidth capability, the first port capability is less than or equal to the second port capability.

[0273] In some embodiments, before executing the transmission mode switching, the terminal device sends capability information indicating the capability supported by the terminal device to the network device, wherein the capability information indicates the port capability and / or bandwidth capability, the port capability includes at least the first port capability and the second port capability, and the bandwidth capability includes at least the first bandwidth capability and the second bandwidth capability. In some embodiments, the capability information also indicates the processing delay of switching between different capabilities. In some embodiments, the processing delay of switching between different capabilities can be reported separately.

[0274] In some embodiments, before performing the transmission mode switching, the terminal device receives a transmission mode indication from the network device, wherein the transmission mode indication includes: the second transmission mode, and / or the effective time of the second transmission mode. In some embodiments, receiving the transmission mode indication includes at least one of the following: receiving the transmission mode indication through RRC signaling; receiving the transmission mode indication through BWP configuration information; receiving the transmission mode indication through serving cell configuration information; receiving the transmission mode indication through SCell activation signaling; or receiving the transmission mode indication through SCell deactivation signaling.

[0275] In some embodiments, the behavior of the terminal device performing transmission mode switching includes one or more of the following behaviors: changing the working port of the terminal device; changing the working bandwidth of the terminal device; or changing the baseband processing capability of the terminal device.

[0276] In some embodiments, before performing the transmission mode switching, the terminal device sends a transmission mode switching request to the network device. In some embodiments, sending the transmission mode switching request includes at least one of the following: sending the transmission mode switching request via PRACH; sending the transmission mode switching request via PUSCH; or sending the transmission mode switching request via PUCCH.

[0277] In some embodiments, the transmission mode switching request includes at least one of the following: an uplink resource request for reporting the second transmission mode, a reason for the terminal device to switch the transmission mode, an indication of the second transmission mode after switching, and a transmission mode switching protection interval. In some embodiments, the triggering condition for sending the transmission mode switching request to the network device includes at least one of the following: a change in the energy saving requirement of the terminal device, a change in the channel quality of the terminal device, a change in the service load of the network device, a change in the amount of service to be transmitted by the terminal device, or a change in the channel characteristics of the terminal device.

[0278] Figure 6 A flow chart of a communication process 600 according to some embodiments of the present disclosure is shown. The communication process 600 may be performed in a Figures 1A to 4 The network device 110 is shown as being implemented.

[0279] refer to Figure 6 , at 610, the network device 110 sends a signal to the terminal device 120 or receives a signal from the terminal device 120 based on the first transmission mode of the terminal device 120, wherein the first transmission mode corresponds to the first port capability and / or the first bandwidth capability.

[0280] At 620, after the terminal device 120 performs a transmission mode switch from the first transmission mode to the second transmission mode, the network device 110 sends a signal to or receives a signal from the terminal device 120 based on the second transmission mode of the terminal device 120, wherein the second transmission mode corresponds to a second port capability and / or a second bandwidth capability.

[0281] In some embodiments, the first port capability and the second port capability include at least one of the following: the number of pilot ports, the number of data ports, the number of pilot streams, the number of data channel streams, the number of transmitting antenna ports, the number of receiving antenna ports, the number of transmitting ports, the number of receiving ports, and the connection relationship between the RF chain and the antenna.

[0282] In some embodiments, the first bandwidth capability and the second bandwidth capability include at least one of the following: single carrier bandwidth, multi-carrier aggregation bandwidth, multi-carrier aggregation number, pilot signal bandwidth, data channel bandwidth, uplink bandwidth, downlink bandwidth, and RF chain operating bandwidth.

[0283] In some embodiments, when the first port capability is greater than or equal to the second port capability, the first bandwidth capability is less than or equal to the second bandwidth capability; or when the first bandwidth capability is greater than or equal to the second bandwidth capability, the first port capability is less than or equal to the second port capability.

[0284] In some embodiments, the network device receives capability information from the terminal device indicating the capability supported by the terminal device, wherein the capability information indicates the port capability and / or bandwidth capability, the port capability includes at least the first port capability and the second port capability, and the bandwidth capability includes at least the first bandwidth capability and the second bandwidth capability. In some embodiments, the capability information also indicates the processing delay of switching between different capabilities. In some embodiments, the processing delay of switching between different capabilities can be reported separately.

[0285] In some embodiments, based on the capability information, the network device determines one or more transmission modes supported by the terminal device, and determines, from the one or more transmission modes, a second transmission mode to be switched by the terminal device. In some embodiments, the network device sends a transmission mode indication to the terminal device, wherein the transmission mode indication includes: the second transmission mode, and / or the effective time of the second transmission mode.

[0286] In some embodiments, sending the transmission mode indication includes at least one of the following: sending the transmission mode indication through RRC signaling; sending the transmission mode indication through BWP configuration information; sending the transmission mode indication through serving cell configuration information; sending the transmission mode indication through SCell activation signaling; or sending the transmission mode indication through SCell deactivation signaling.

[0287] In some embodiments, the network device receives a transmission mode switching request from the terminal device. In some embodiments, the transmission mode switching request includes at least one of the following: an uplink resource request of the terminal device for reporting the second transmission mode, a reason for the terminal device to switch the transmission mode, an indication of the second transmission mode after switching, and a transmission mode switching protection interval.

[0288] In some embodiments, the network device receives a transmission mode switched message from the terminal device, wherein the transmission mode switched message includes at least one of the following: whether the transmission mode switch is completed, the reason why the terminal device switches the transmission mode, and an indication of the second transmission mode after switching.

[0289] Figure 7 and Figure 8 The following is a schematic diagram of the structure of possible communication devices provided by the embodiments of the present disclosure. These communication devices can be used to implement the functions of the network device or terminal device in the above method embodiments, and thus can also achieve the beneficial effects of the above method embodiments. In the embodiments of the present disclosure, the communication device can be as follows: Figures 1A to 1C The network device 110 or terminal device 120 shown may also be a module (such as a chip) applied to the network device or the terminal device.

[0290] like Figure 7 As shown, the communication device 700 includes a transceiver unit 720. The communication device 700 may also include a processing unit 710 for processing data or other data received or sent by the transceiver unit 720. The communication device 700 is used to implement the above Figures 2 to 6 The functions of the network device or the terminal device in the embodiments shown in FIG.

[0291] Optionally, the transceiver unit 720 may include a sending unit and a receiving unit. The sending unit is used to perform the sending operation in the above method embodiment. The receiving unit is used to perform the receiving operation in the above method embodiment.

[0292] It should be noted that the communication device 700 may include a sending unit but not a receiving unit. Alternatively, the communication device 700 may include a receiving unit but not a sending unit. Specifically, it may depend on whether the above solution executed by the communication device 700 includes a sending action and a receiving action.

[0293] When the communication device 700 is used to implement Figures 2 to 6The functions of the terminal device in the embodiment shown are: the transceiver unit 720 is used to receive or send signals based on a first transmission mode, wherein the first transmission mode corresponds to a first port capability and / or a first bandwidth capability; the processing unit 710 is used to perform a transmission mode switch from the first transmission mode to a second transmission mode, wherein the second transmission mode corresponds to a second port capability and / or a second bandwidth capability; the transceiver unit 720 is also used to receive or send signals based on the second transmission mode.

[0294] When the communication device 700 is used to implement Figures 2 to 6 The functions of the network device in the illustrated embodiment are as follows: the transceiver unit 720 is used to send signals to or receive signals from the terminal device based on the first transmission mode of the terminal device, wherein the first transmission mode corresponds to the first port capability and / or the first bandwidth capability; the transceiver unit 720 is also used to send signals to or receive signals from the terminal device based on the second transmission mode of the terminal device after the terminal device executes a transmission mode switch from the first transmission mode to the second transmission mode, wherein the second transmission mode corresponds to the second port capability and / or the second bandwidth capability.

[0295] For more detailed description of the transceiver unit 720 and the processing unit 710, please refer to Figures 2 to 6 The relevant description in the illustrated embodiment will not be repeated here.

[0296] The processing unit 710 in the above embodiment can be implemented by at least one processor or processor-related circuit. The transceiver unit 720 can be implemented by a transceiver or a transceiver-related circuit. The transceiver module 720 can also be called a communication module or a communication interface. The storage module can be implemented by at least one memory.

[0297] In the embodiments of the present disclosure, the antenna and the radio frequency circuit having transceiver functions may be regarded as the transceiver unit of the terminal device, and the processor having a processing function may be regarded as the processing unit of the terminal device.

[0298] like Figure 8 As shown, the communication device 800 includes a processor 810 and an interface circuit 820. The processor 810 and the interface circuit 820 are coupled to each other. The processor 810 may also be referred to as a processing unit, a processing board, a processing module, or a processing device.

[0299] It is understandable that the interface circuit 820 may be a transceiver or an input / output interface. A transceiver includes a receiver and a transmitter. A transceiver may sometimes be referred to as a transceiver, a transceiver module, or a transceiver circuit. A receiver may sometimes be referred to as a receiver, a receiving module, or a receiving circuit. A transmitter may sometimes be referred to as a transmitter, a transmitting module, or a transmitting circuit.

[0300] Optionally, the communication device 800 may further include a memory 830 for storing instructions executed by the processor 810 or storing input data required for the processor 810 to execute instructions or storing data generated after the processor 810 executes instructions.

[0301] When the device 800 is a chip, the chip includes a processor, a memory and a transceiver. Among them, the transceiver can be an input-output circuit or a communication interface. The processor can be a processing module or a microprocessor or an integrated circuit integrated on the chip. In the embodiments of the present disclosure, the sending operation of the communication device can be understood as the output of the chip, and the receiving operation of the communication device can be understood as the input of the chip.

[0302] When the communication device 800 is used to implement Figures 2 to 6 In the process shown, the interface circuit 820 is used to implement the functions of the above-mentioned transceiver unit 720.

[0303] When the above communication device is a chip applied to a terminal device, the terminal chip implements the functions of the terminal device in the above method embodiment. The terminal chip receives information sent by the network device to the terminal device through other modules in the terminal (such as a radio frequency module or an antenna); or the terminal chip sends information to other modules in the terminal device (such as a radio frequency module or an antenna), and the information is sent by the terminal device to the network device.

[0304] When the above-mentioned communication device is a module applied to a network device, the network device module implements the function of the network device in the above-mentioned method embodiment. The network device module receives information from other modules in the network device (such as a radio frequency module or an antenna), and the information is sent by the terminal device to the network device; or, the network device module sends information to other modules in the base station (such as a radio frequency module or an antenna), and the information is sent by the network device to the terminal device. The network device module here can be a baseband chip of a base station, or a CU, DU or other module, or a device under the O-RAN architecture, such as an open CU, an open DU and other devices.

[0305] It is understood that the processor in the embodiments of the present disclosure may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application specific integrated circuits (ASIC), field programmable gate arrays (FPGA) or other programmable logic devices, transistor logic devices, hardware components or any combination thereof. The general-purpose processor may be a microprocessor or any conventional processor.

[0306] The method steps in the embodiments of the present disclosure can be implemented in hardware or in software instructions that can be executed by a processor. The software instructions can be composed of corresponding software modules, and the software modules can be stored in random access memory, flash memory, read-only memory, programmable read-only memory, erasable programmable read-only memory, electrically erasable programmable read-only memory, registers, hard disks, mobile hard disks, compact disc read-only memory (CD-ROM) or any other form of storage medium known in the art. An exemplary storage medium is coupled to the processor so that the processor can read information from the storage medium and write information to the storage medium. The storage medium can also be a component of the processor. The processor and the storage medium can be located in an ASIC. In addition, the ASIC can be located in a base station or a terminal. The processor and the storage medium can also be present in a base station or a terminal as discrete components.

[0307] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented by 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 programs or instructions. When the computer program or instruction is loaded and executed on a computer, the process or function described in the embodiment of the present disclosure is executed in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, a network device, a user device or other programmable device. The computer program or instruction 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 program or instruction may be transmitted from one website site, computer, server or data center to another website site, computer, server or data center by wired or wireless means. The computer-readable storage medium may be any available medium that a computer can access or a data storage device such as a server, data center, etc. that integrates one or more available media. The available medium may be a magnetic medium, for example, a floppy disk, a hard disk, a tape; it may also be an optical medium, for example, a digital video disc; it may also be a semiconductor medium, for example, a solid-state hard disk. The computer-readable storage medium may be a volatile or nonvolatile storage medium, or may include both volatile and nonvolatile types of storage media.

[0308] In the various embodiments of the present disclosure, unless otherwise specified or there is a logical conflict, the terms and / or descriptions between different embodiments are consistent and can be referenced to each other, and the technical features in different embodiments can be combined to form new embodiments according to their internal logical relationships.

[0309] In the present disclosure, "at least one" means one or more, and "more than one" means two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B may represent: A exists alone, A and B exist at the same time, and B exists alone, where A and B may be singular or plural. In the text description of the present disclosure, the character " / " generally indicates that the previous and next associated objects are in an "or" relationship; in the formula of the present disclosure, the character " / " indicates that the previous and next associated objects are in a "division" relationship. "Including at least one of A, B and C" may represent: including A; including B; including C; including A and B; including A and C; including B and C; including A, B and C.

[0310] It is understood that the various numbers involved in the embodiments of the present disclosure are only for the convenience of description and are not used to limit the scope of the embodiments of the present disclosure. The size of the sequence number of the above-mentioned processes does not mean the order of execution, and the execution order of each process should be determined by its function and internal logic.

Claims

1. A data transmission method, comprising: receiving or sending a signal based on a first transmission mode, wherein the first transmission mode corresponds to a first port capability and / or a first bandwidth capability; Performing a transmission mode switch from the first transmission mode to a second transmission mode, wherein the second transmission mode corresponds to a second port capability and / or a second bandwidth capability; as well as A signal is received or sent based on the second transmission mode.

2. The method according to claim 1, further comprising: Before executing the transmission mode switching, capability information indicating the capability supported by the terminal device is sent to the network device, wherein the capability information indicates the port capability and / or bandwidth capability, the port capability includes at least the first port capability and the second port capability, and the bandwidth capability includes at least the first bandwidth capability and the second bandwidth capability.

3. The method according to claim 2, wherein the capability information further indicates a processing delay for switching between different capabilities.

4. The method according to any one of claims 1 to 3, further comprising: Before executing the transmission mode switching, a transmission mode indication is received from a network device, wherein the transmission mode indication includes: the second transmission mode, and / or an effective time of the second transmission mode.

5. The method according to any one of claims 1 to 4, wherein performing the transmission mode switching comprises at least one of the following: Change the working port of the terminal device; changing the operating bandwidth of the terminal device; or Changing the baseband processing capability of the terminal device.

6. The method according to any one of claims 1 to 5, further comprising: Before executing the transmission mode switching, a transmission mode switching request is sent to the network device.

7. The method according to claim 6, wherein the triggering condition for sending the transmission mode switching request comprises at least one of the following: Energy-saving requirements for terminal equipment have changed; The channel quality of the terminal device changes; The business load of the network device changes; The amount of business to be transmitted by the terminal device changes; or The channel characteristics of the terminal device change.

8. A data transmission method, comprising: Based on a first transmission mode of the terminal device, sending a signal to the terminal device or receiving a signal from the terminal device, wherein the first transmission mode corresponds to a first port capability and / or a first bandwidth capability; as well as After the terminal device executes a transmission mode switch from the first transmission mode to the second transmission mode, a signal is sent to or received from the terminal device based on the second transmission mode of the terminal device, wherein the second transmission mode corresponds to a second port capability and / or a second bandwidth capability.

9. The method according to claim 8, further comprising: Capability information indicating support of the terminal device is received from the terminal device, wherein the capability information indicates port capability and / or bandwidth capability, the port capability includes at least the first port capability and the second port capability, and the bandwidth capability includes at least the first bandwidth capability and the second bandwidth capability.

10. The method according to claim 9, wherein the capability information further indicates a processing delay of switching between different capabilities.

11. The method according to claim 9 or 10, further comprising: Based on the capability information, determining one or more transmission modes supported by the terminal device; as well as From the one or more transmission modes, determine the second transmission mode to which the terminal device is to switch.

12. The method according to claim 11, further comprising: Send a transmission mode indication to the terminal device, wherein the transmission mode indication includes: the second transmission mode, and / or the effective time of the second transmission mode.

13. The method according to any one of claims 8 to 12, further comprising: A transmission mode switching request is received from the terminal device.

14. The method according to any one of claims 8 to 13, further comprising: A transmission mode switched message is received from the terminal device, wherein the transmission mode switched message includes at least one of the following: whether the transmission mode switching is completed, the reason why the terminal device switches the transmission mode, and an indication of the second transmission mode after switching.

15. The method according to any one of claims 1 to 14, wherein the first port capability and the second port capability include at least one of the following: the number of pilot ports, the number of data ports, the number of pilot streams, the number of data channel streams, the number of transmitting antenna ports, the number of receiving antenna ports, the number of transmitting ports, the number of receiving ports, and the connection relationship between the RF chain and the antenna.

16. The method according to any one of claims 1 to 15, wherein the first bandwidth capability and the second bandwidth capability include at least one of the following: single carrier bandwidth, multi-carrier aggregation bandwidth, multi-carrier aggregation number, pilot signal bandwidth, data channel bandwidth, uplink bandwidth, downlink bandwidth, and RF chain operating bandwidth.

17. The method according to any one of claims 1 to 16, wherein when the first port capability is greater than or equal to the second port capability, the first bandwidth capability is less than or equal to the second bandwidth capability; or when the first bandwidth capability is greater than or equal to the second bandwidth capability, the first port capability is less than or equal to the second port capability.

18. The method according to claim 4 or 12, wherein the transmission mode indication is carried by at least one of the following: Radio Resource Control (RRC) signaling; Partial bandwidth BWP configuration information; Serving cell configuration information; SCell activation signaling; or SCell deactivation signaling.

19. The method according to claim 6, 7 or 13, wherein the transmission mode switching request includes at least one of the following: a request for reporting the uplink resources of the second transmission mode, the reason for the terminal device to switch the transmission mode, an indication of the second transmission mode after switching, and a transmission mode switching protection interval.

20. The method according to claim 6, 7, 13 or 19, wherein the transmission mode switching request is carried by at least one of the following: Physical Random Access Channel PRACH; Physical Uplink Shared Channel PUSCH; or Physical Uplink Control Channel PUCCH.

21. A communication device comprising a transceiver module and a processing module; The transceiver module is used to perform the transceiver operation of the method as claimed in any one of claims 1 to 7 and 15 to 20, and the processing module is used to perform the processing operation of the method as claimed in any one of claims 1 to 7 and 15 to 20.

22. A communication device comprising a transceiver module; The transceiver module is used to perform the transceiver operation of the method as described in any one of claims 8 to 20.

23. The communication device of claim 22, wherein the device further comprises a processing module; When the transceiver module is used to perform the transceiver operation of the method as claimed in any one of claims 8 to 20, the processing module is used to perform the processing operation of the method as claimed in any one of claims 8 to 20.

24. A communication device, comprising: A processor, wherein the processor is configured to execute a computer program or computer instructions in a memory to perform the method according to any one of claims 1 to 20.

25. A communication system, comprising a first communication device and a second communication device, the first communication device being configured to execute the method according to any one of claims 1 to 7 and 15 to 20, and the second communication device being configured to execute the method according to any one of claims 8 to 20.

26. A computer-readable storage medium having a computer program stored thereon, wherein when the computer program is executed by a device, the device executes the method according to any one of claims 1 to 20.

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