Wireless communication method, device and system

Abstract

The invention discloses a wireless communication method, device and system. The method comprises the following steps: a terminal sends uplink communication data to a base station by adopting a preset uplink sub-band; wherein the preset uplink sub-band is a part of frequency domain resource fragment configured by the base station on the overall frequency domain resource, and is recorded as a target frequency domain resource fragment; the terminal adopts a preset downlink sub-band to receive downlink communication data sent by the base station; wherein the preset downlink sub-band is the overall frequency domain resource configured by the base station. By adopting the technical means of the invention, the simultaneous receiving and transmitting of uplink and downlink communication data can be supported, and the influence on the uplink and downlink performance can be minimized.

Description

Technical Field

[0001] The present invention relates to the field of wireless communication technologies, and in particular, to a wireless communication method, apparatus, and system. Background Art

[0002] Existing base stations use TDM (Time Division Multiplexing) mode for uplink and downlink multiplexing transmission on a TDD (Time Division Duplex) carrier. Due to the limited uplink duty cycle, the uplink coverage performance of the terminal UE and the uplink and downlink delays are restricted by the TDD uplink and downlink configuration. Currently, SBFD (Sub-Band Full Duplex) uses a part of the frequency domain resources as the uplink sub-band and another part of the frequency domain resources as the downlink sub-band. When the base station transmits on an SBFD symbol, the base station performs downlink transmission on the downlink sub-band and uplink reception on the uplink sub-band at the same time, so as to achieve simultaneous uplink and downlink transceiver on the base station side.

[0003] When the base station performs simultaneous transceiver on the SBFD symbol, the following antenna and radio frequency structure is usually adopted, that is, the antenna is divided into two groups, one group is used for transmission and the other group is used for reception. However, the prior art has at least the following problems: the foregoing antenna and radio frequency architecture will cause the number of transmit and receive antennas on the SBFD symbol to be reduced to half of the original (that is, half of the antennas are used for transmission and the other half of the antennas are used for reception), resulting in limited uplink and downlink performance of the SBFD symbol. At the same time, since the base station can only transmit on the downlink sub-band, the overall downlink time-frequency resources are reduced, resulting in a significant decline in downlink performance. Summary of the Invention

[0004] The purpose of the embodiments of the present invention is to provide a wireless communication method, apparatus, and system, which can support simultaneous transceiver of uplink and downlink communication data and minimize the impact on uplink and downlink performance at the same time.

[0005] To achieve the above purpose, the embodiments of the present invention provide a wireless communication method, which is applied to the terminal side, and the method includes:

[0006] Sending uplink communication data to the base station using a preset uplink sub-band; wherein, the preset uplink sub-band is a partial frequency domain resource segment configured by the base station on the overall frequency domain resources, denoted as the target frequency domain resource segment;

[0007] Receiving the downlink communication data sent by the base station using a preset downlink sub-band; wherein, the preset downlink sub-band is the overall frequency domain resources configured by the base station.

[0008] As an improvement to the above solution, the power of the base station to send downlink communication data on the target frequency-domain resource segment is less than the power of sending downlink communication data on the frequency-domain resource segments outside the target frequency-domain resource segment.

[0009] As an improvement to the above solution, the uplink communication data includes physical uplink control channel data.

[0010] As an improvement to the above solution, the uplink communication data includes physical uplink shared channel data with an MCS value lower than a preset threshold, and does not include physical uplink shared channel data with an MCS value higher than the preset threshold.

[0011] As an improvement to the above solution, receiving the downlink communication data sent by the base station using a preset downlink subband includes:

[0012] Receiving the physical downlink control channel data sent by the base station using the preset downlink subband; wherein, the physical downlink control channel data is used to instruct the terminal to receive physical downlink shared channel data using the first frequency-domain resource segment in the downlink subband;

[0013] Receiving a first indication signaling sent by the base station; wherein, the first indication signaling is applicable to the case where the first frequency-domain resource segment overlaps with the target frequency-domain resource segment; the first indication signaling is used to instruct whether the terminal uses the first overlapping frequency-domain resource segment to receive the physical downlink shared channel data, and the first overlapping frequency-domain resource segment is the part of the first frequency-domain resource segment that overlaps with the target frequency-domain resource segment.

[0014] As an improvement to the above solution, when the first indication signaling instructs the terminal to use the first overlapping frequency-domain resource segment to receive the physical downlink shared channel data, the first indication signaling is further used to instruct whether the power of the base station to send the physical downlink shared channel data on the first overlapping frequency-domain resource segment is the same as the power of the base station to send the physical downlink shared channel data on the first non-overlapping frequency-domain resource segment;

[0015] wherein, the first non-overlapping frequency-domain resource segment is the part of the first frequency-domain resource segment that does not overlap with the target frequency-domain resource segment.

[0016] As an improvement to the above solution, receiving the downlink communication data sent by the base station using a preset downlink subband includes:

[0017] Receiving the downlink channel state information reference signal CSI-RS sent by the base station using the second frequency-domain resource segment in the downlink subband;

[0018] Sending uplink communication data to a base station using a preset uplink subband includes:

[0019] When receiving a second indication signaling from the base station, according to the second indication signaling, using a preset uplink subband to feedback the radio channel measurement result obtained through the CSI-RS signal to the base station;

[0020] Wherein, the second indication signaling is applicable to the situation where the second frequency domain resource segment overlaps with the target frequency domain resource segment; the second indication signaling is used to indicate whether the power of the CSI-RS signal sent by the base station on the second overlapping frequency domain resource segment is the same as the power of the CSI-RS signal sent on the second non-overlapping frequency domain resource segment; the second overlapping frequency domain resource segment is the part of the second frequency domain resource segment that overlaps with the target frequency domain resource segment, and the second non-overlapping frequency domain resource segment is the part of the second frequency domain resource segment that does not overlap with the target frequency domain resource segment.

[0021] As an improvement to the above solution, feedbacking the radio channel measurement result obtained through the CSI-RS signal according to the second indication signaling includes:

[0022] When the second indication signaling indicates that the power of the CSI-RS signal sent by the base station on the second overlapping frequency domain resource segment is different from the power of the CSI-RS signal sent on the second non-overlapping frequency domain resource segment, dividing the CSI subband where the junction of the second overlapping frequency domain resource segment and the second non-overlapping frequency domain resource segment is located into two CSI subbands according to the junction for feedback of the radio channel measurement result.

[0023] An embodiment of the present invention further provides a wireless communication device, which is applied to the terminal side, and the device includes:

[0024] An uplink data sending module, configured to send uplink communication data to a base station using a preset uplink subband; wherein, the preset uplink subband is a partial frequency domain resource segment configured by the base station on the overall frequency domain resource, denoted as the target frequency domain resource segment;

[0025] A downlink data receiving module, configured to receive downlink communication data sent by the base station using a preset downlink subband; wherein, the preset downlink subband is the overall frequency domain resource configured by the base station, or a frequency domain resource segment other than the target frequency domain resource segment.

[0026] An embodiment of the present invention further provides a wireless communication system, including a base station and a terminal, wherein the terminal is used to execute the wireless communication method described in any one of the above.

[0027] Compared with the prior art, the wireless communication method, apparatus, and system disclosed in the present invention use specific frequency-domain resources in the overall frequency-domain resources as the uplink sub-band through the base station, and use the overall frequency-domain resources as the downlink sub-band. Compared with the existing TDD system, it can not only support the simultaneous transmission and reception of uplink and downlink communication data on the base station side, improve the available time-frequency resources for the uplink, but also avoid the reduction of the overall downlink time-frequency resources, thereby minimizing the impact on the uplink and downlink performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a schematic flowchart of a wireless communication method provided by an embodiment of the present invention;

[0029] Figure 2 is a schematic structural diagram of an antenna and a radio frequency channel in an embodiment of the present invention;

[0030] Figure 3 is a schematic diagram of the principle of the broadband configured for the antenna and the radio frequency channel in an embodiment of the present invention;

[0031] Figure 4 is a schematic diagram of a first frequency-domain resource segment in an embodiment of the present invention;

[0032] Figure 5 is a schematic diagram of a second frequency-domain resource segment in an embodiment of the present invention;

[0033] Figure 6 is a schematic structural diagram of a wireless communication apparatus provided by an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0034] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0035] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0036] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of this application, unless otherwise specified, the meaning of "a plurality" is two or more.

[0037] See Figure 1 , which is a schematic flowchart of a wireless communication method provided by an embodiment of the present invention. An embodiment of the present invention provides a wireless communication method applied to the terminal side. The method specifically includes steps S11 and S12:

[0038] S11. Send uplink communication data to the base station using a preset uplink sub-band; wherein, the preset uplink sub-band is a partial frequency domain resource segment configured by the base station on the overall frequency domain resource, denoted as the target frequency domain resource segment;

[0039] S12. Receive downlink communication data sent by the base station using a preset downlink sub-band; wherein, the preset downlink sub-band is the overall frequency domain resource configured by the base station, or the frequency domain resource segment other than the target frequency domain resource segment.

[0040] It should be noted that in the prior art, a part of the frequency resources is used as the uplink sub-band and another part of the frequency resources is used as the downlink sub-band. When the base station transmits on an SBFD symbol, the base station performs downlink transmission on the downlink sub-band and uplink reception on the uplink sub-band, which will limit the uplink and downlink performance of the SBFD symbol, and the base station can only transmit on the partial frequency domain resource corresponding to the downlink sub-band, resulting in a reduction in the overall downlink time-frequency resources.

[0041] Therefore, in order not to affect the simultaneous transceiver of the uplink and downlink communication data of the base station and ensure the downlink performance, in the embodiment of the present invention, the base station reconfigures the frequency domain resources for transceiver of the uplink and downlink communication data. By configuring a partial specific frequency domain resource segment (denoted as the target frequency domain resource segment) in the overall frequency domain resource as the uplink sub-band and configuring the overall frequency domain resource as the downlink sub-band. Therefore, the target frequency domain resource segment serves as both the uplink sub-band and the downlink sub-band at the same time.

[0042] When communicating data is transceived between the base station and the terminal, the terminal sends uplink communication data to the base station using the uplink sub-band, that is, the base station receives the uplink communication data sent by the terminal using the uplink sub-band; the terminal receives the downlink communication data sent by the base station using the downlink sub-band, that is, the base station sends the downlink communication data to the terminal using the downlink sub-band.

[0043] That is to say, there are the following two situations in the process of transmitting and receiving communication data between the base station and the terminal:

[0044] Simultaneous and different frequencies: The base station sends downlink communication data to the terminal on the frequency domain resource segments (denoted as non-target frequency domain resource segments) in the overall frequency domain resource except the target frequency domain resource segment, and at the same time, the base station receives the uplink communication data sent by the terminal on the target frequency domain resource segment;

[0045] Simultaneous and same frequencies: The base station sends downlink communication data to the terminal on the overall frequency domain resource (including the target frequency domain resource segment and the non-target frequency domain resource segment), and at the same time, the base station receives the uplink communication data sent by the terminal on the target frequency domain resource segment.

[0046] It should be noted that the overall frequency domain resource refers to the BWP (Bandwidth Part) frequency domain, not all the frequency domain resources. The BWP is equivalent to dividing the 5G spectrum into many small blocks within a certain period of time. Each BWP can use different parameter sets, and its bandwidth, subcarrier spacing, and other control parameters can all be different.

[0047] As a preferred implementation manner, the embodiments of the present invention optimize the specific implementation manner of the above frequency domain resource configuration. On the basis of the original TDD base station, a new uplink receiving module is added, and the uplink receiving module can only be used for receiving uplink communication data and cannot send downlink communication data.

[0048] It should be noted that in the prior art, when the base station performs simultaneous transmission and reception in SBFD symbols, an antenna transceiver module is usually used to implement it. The antenna transceiver module includes an antenna and a radio frequency channel. Among them, the antenna is divided into two groups, one group is used for transmission and the other group is used for reception. When the base station sends or receives in non-SBFD symbols, all the antennas in the two groups are used for sending or receiving. That is to say, each antenna in the original antenna transceiver module of the base station and its connected radio frequency channel have the capabilities of sending and receiving, or in other words, each antenna is connected to a radio frequency transmission link and a radio frequency receiving link.

[0049] Therefore, referring to Figure 2 , which is a schematic structural diagram of the antenna and radio frequency channel in the embodiments of the present invention. On the basis of the original antenna and radio frequency structure of the base station, a new uplink receiving module is added, and the uplink receiving module includes a newly added receiving antenna and radio frequency channel.

[0050] Optionally, the uplink receiving module and the original antenna transceiver module are separated by an isolation material.

[0051] The base station configures time and frequency resource information of an uplink sub-band for the terminal, such as symbol resource information occupied by the uplink sub-band, frequency-domain resource information occupied by the uplink sub-band, etc. This uplink sub-band can be located in DL symbols or Flexible symbols indicated by TDD-UL-DL-ConfigCommon / TDD-UL-DL-ConfigDedicated sent by the base station.

[0052] See Figure 3 , which is a schematic diagram of the principle of the broadband configured for the antenna and radio frequency channel in an embodiment of the present invention. In the embodiment of the present invention, the existing antennas and radio frequency channels in the base station are configured to send downlink communication data of the base station, and the newly added antenna receiving module in the base station is configured to receive uplink communication data of the base station. Therefore, the frequency-domain resources corresponding to the existing antennas and radio frequency channels are the overall frequency-domain resources (target frequency-domain resource segment + non-target frequency-domain resource segment), and the frequency-domain resources corresponding to the newly added antenna receiving module are the target frequency-domain resource segment.

[0053] That is to say, there are the following two situations in the process of transceiver of communication data between the base station and the terminal:

[0054] Simultaneous and different frequencies: The base station sends downlink communication data on the configured non-target frequency-domain resource segment through the existing antennas and radio frequency channels, and at the same time, the base station receives uplink communication data on the target frequency-domain resource segment through the newly added antenna;

[0055] Simultaneous and same frequencies: The base station sends downlink communication data on the configured overall resource frequency domain (target frequency-domain resource segment + non-target frequency-domain resource segment) through the existing antennas and radio frequency channels, and at the same time, the base station receives uplink communication data on the target frequency-domain resource segment through the newly added antenna.

[0056] By adopting the technical means of the embodiment of the present invention, the base station configures specific frequency-domain resources on the overall frequency-domain resources as uplink sub-bands and configures the overall frequency-domain resources as downlink sub-bands. Compared with the existing TDD system, it can not only support the simultaneous transceiver of uplink and downlink communication data on the base station side, improve the available time-frequency resources of the uplink, but also avoid the reduction of the overall downlink time-frequency resources, thereby minimizing the impact on the uplink and downlink performance.

[0057] As a preferred implementation manner, the embodiment of the present invention is further implemented on the basis of the above embodiment. The power of the base station to send downlink communication data on the target frequency-domain resource segment is less than the power to send downlink communication data on the frequency-domain resource segment outside the target frequency-domain resource segment.

[0058] In the embodiment of the present invention, the overall frequency domain resource is used as a downlink sub-band to implement the transmission of downlink communication data, and only the target frequency domain resource segment is used as an uplink sub-band to implement the transmission of uplink communication data. Therefore, the power of the base station to send data on the target frequency domain resource segment should be less than the power to send data on the non-target frequency domain resource segment.

[0059] By adopting the technical means of the embodiment of the present invention, the power of the base station to transmit data on the target frequency domain resource segment and the non-target frequency domain resource segment is limited, thereby improving the transmission stability of communication data.

[0060] As a preferred embodiment, the embodiment of the present invention is further implemented on the basis of the above embodiment, and the uplink communication data includes physical uplink control channel data PUCCH.

[0061] The uplink communication data includes physical uplink shared channel data PUSCH with an MCS (Modulation and Coding Scheme) value lower than a preset threshold, and does not include physical uplink shared channel data PUSCH with an MCS value higher than the preset threshold.

[0062] It should be noted that MCS is an index in wireless communication, which is used to describe the relationship between the channel quality and data transmission rate between the base station and the terminal device. The MCS value indicates which modulation and coding method is used to transmit data. A higher MCS value usually indicates better channel quality and higher data transmission rate, while a lower MCS value indicates poorer channel quality and lower data transmission rate.

[0063] In the embodiment of the present invention, since the demodulation threshold of PUCCH data is high and it is not easy to demodulate incorrectly, while the demodulation threshold of PUSCH data using a low-order MCS is low and it is easy to demodulate incorrectly. Therefore, on the time and frequency domain resources of the configured uplink sub-band, the newly added uplink receiving module of the base station can be used to receive and demodulate the PUCCH data sent by the terminal, but not for receiving and demodulating the PUSCH data sent by the terminal; or, the newly added uplink receiving module of the base station can be used to receive and demodulate the PUCCH data and the PUSCH data using a lower-order MCS sent by the terminal, but not for receiving and demodulating the PUSCH data using a higher-order MCS.

[0064] By adopting the technical means of the embodiment of the present invention, the type of uplink communication data transmitted on the target frequency domain resource segment is limited, thereby improving the transmission stability of communication data.

[0065] As a preferred embodiment, the embodiment of the present invention is further implemented on the basis of the above embodiment, see Figure 4, is a schematic diagram of the first frequency-domain resource segment in an embodiment of the present invention. In the embodiment of the present invention, the downlink communication data sent by the base station to the terminal includes physical downlink control channel data PDCCH and physical downlink shared channel data PDSCH.

[0066] Then step S11, that is, receiving the downlink communication data sent by the base station using the preset downlink sub-band, includes:

[0067] Receiving the physical downlink control channel data sent by the base station using the preset downlink sub-band; wherein, the physical downlink control channel data is used to instruct the terminal to receive the physical downlink shared channel data using the first frequency-domain resource segment in the downlink sub-band.

[0068] Receiving a first indication signaling sent by the base station, and receiving and demodulating the physical downlink shared channel data according to the first indication signaling; wherein, the first indication signaling is applicable to the case where the first frequency-domain resource segment overlaps with the target frequency-domain resource segment; the first indication signaling is used to indicate whether the terminal uses the first overlapping frequency-domain resource segment to receive the physical downlink shared channel data, and the first overlapping frequency-domain resource segment is the part of the first frequency-domain resource segment that overlaps with the target frequency-domain resource segment.

[0069] Preferably, when the first indication signaling instructs the terminal to use the first overlapping frequency-domain resource segment to receive the physical downlink shared channel data, the first indication signaling is further used to indicate whether the power of the base station sending the physical downlink shared channel data on the first overlapping frequency-domain resource segment is the same as the power of the base station sending the physical downlink shared channel data on the first non-overlapping frequency-domain resource segment; wherein, the first non-overlapping frequency-domain resource segment is the part of the first frequency-domain resource segment that does not overlap with the target frequency-domain resource segment.

[0070] Specifically, if the terminal receives the PDCCH data sent by the base station, and the PDCCH data indicates that the FDRA domain is used to indicate the frequency-domain resources for the terminal to receive PDSCH data (i.e., the first frequency-domain resource segment), there is partial or complete overlap between the frequency-domain resources indicated by the FDRA domain and the target frequency-domain resource segment corresponding to the uplink subband configured by the base station. For the convenience of description, hereinafter, this part of the overlapping frequency-domain resources in the frequency-domain resources indicated by the FDRA domain is referred to as the "overlapping PDSCH frequency-domain resources" (i.e., the first overlapping frequency-domain resource segment), and the other frequency-domain resources in the frequency-domain resources indicated by the FDRA domain are referred to as the "non-overlapping PDSCH frequency-domain resources" (i.e., the first non-overlapping frequency-domain resource segment). Then, the base station can, by sending a signaling, indicate to the terminal that in this case, the "overlapping PDSCH frequency-domain resources" are used for receiving PDSCH data, that is, the "overlapping PDSCH frequency-domain resources" carry part of the information of the PDSCH; or indicate to the terminal to skip the "overlapping PDSCH frequency-domain resources" when receiving the PDSCH, that is, the "overlapping PDSCH frequency-domain resources" do not carry part of the information of the PDSCH.

[0071] Further, if the terminal uses the "overlapping PDSCH frequency-domain resources" for receiving the PDSCH in this case, the base station can also, by sending a signaling, indicate to the terminal whether the transmission powers of the PDSCH on the "overlapping PDSCH frequency-domain resources" and the "non-overlapping PDSCH frequency-domain resources" are the same, so that the terminal can receive and demodulate the PDSCH according to the content indicated by the signaling.

[0072] It should be noted that generally, if the transmission powers are different, the transmission power of the PDSCH on the "overlapping PDSCH frequency-domain resources" is less than the transmission power of the PDSCH on the "non-overlapping PDSCH frequency-domain resources".

[0073] It should be noted that the above two signaling can be the same signaling or different signaling.

[0074] Optionally, the first indication signaling is a semi-static signaling or a dynamic signaling.

[0075] As an example, the semi-static signaling is such as RRC (Radio Resource Control), and the dynamic signaling is such as MAC-CE or PDCCH.

[0076] As a preferred implementation manner, the embodiment of the present invention is further implemented on the basis of the above embodiment. Refer to Figure 5, which is a schematic diagram of the second frequency-domain resource segment in an embodiment of the present invention. In the embodiment of the present invention, the downlink communication data sent by the base station to the terminal includes CSI-RS (Channel-State-Information Reference Signal), and the uplink communication data sent by the terminal to the base station includes the wireless channel measurement results obtained through the CSI-RS signal.

[0077] It should be noted that in the 5G NR communication architecture, in order to facilitate downlink communication between the base station and the terminal, it is usually necessary to detect the downlink wireless channel. The main method is that the base station sends a CSI-RS signal, and the UE measures and evaluates the wireless channel through the received CSI-RS signal and reports the measurement results to the network. In subsequent transmissions, the network can set appropriate transmission parameters for subsequent downlink transmissions based on these measurement results.

[0078] Then step S12, that is, receiving the downlink communication data sent by the base station using the preset downlink subband, includes: receiving the downlink channel state information reference signal CSI-RS sent by the base station using the second frequency-domain resource segment in the downlink subband;

[0079] Step S11, that is, sending uplink communication data to the base station using the preset uplink subband, includes:

[0080] When receiving the second indication signaling sent by the base station, according to the second indication signaling, using the preset uplink subband to feedback the wireless channel measurement results obtained through the CSI-RS signal to the base station.

[0081] Wherein, the second indication signaling is applicable to the situation where the second frequency-domain resource segment overlaps with the target frequency-domain resource segment; the second indication signaling is used to indicate whether the power of the CSI-RS signal sent by the base station on the second overlapping frequency-domain resource segment is the same as the power of the CSI-RS signal sent on the second non-overlapping frequency-domain resource segment; the second overlapping frequency-domain resource segment is the part of the second frequency-domain resource segment that overlaps with the target frequency-domain resource segment, and the second non-overlapping frequency-domain resource segment is the part of the second frequency-domain resource segment that does not overlap with the target frequency-domain resource segment.

[0082] Preferably, feedbacking the wireless channel measurement results obtained through the CSI-RS signal according to the second indication signaling includes:

[0083] When the second indication signaling indicates that the power of transmitting the CSI-RS signal on the second overlapping frequency-domain resource segment is different from the power of transmitting the CSI-RS signal on the second non-overlapping frequency-domain resource segment, the CSI sub-band where the junction of the second overlapping frequency-domain resource segment and the second non-overlapping frequency-domain resource segment is located is divided into two CSI sub-bands according to the junction for feedback of the radio channel measurement results.

[0084] Specifically, if the terminal is configured with CSI-RS resource information, and part of the time-frequency resources of this CSI-RS resource (i.e., the second frequency-domain resource segment) partially or completely overlaps with the target frequency-domain resource segment corresponding to the uplink sub-band configured by the base station. For the sake of convenience in description, hereinafter, this part of the overlapping time-frequency resources of the CSI-RS resource is referred to as "overlapping CSI-RS time-frequency resources" (i.e., the second overlapping frequency-domain resource segment), and the other time-frequency resources of the CSI-RS resource are referred to as "non-overlapping CSI-RS time-frequency resources" (i.e., the second non-overlapping frequency-domain resource segment), then the base station can indicate to the terminal whether the CSI-RS transmit power on the "overlapping CSI-RS time-frequency resources" and the CSI-RS transmit power on the "non-overlapping CSI-RS time-frequency resources" are the same or the power difference between the two by sending signaling.

[0085] As an example, the signaling sent by the base station is 1 bit, where "0" represents that the CSI-RS transmit power on the "overlapping CSI-RS time-frequency resources" is the same as the CSI-RS transmit power on the "non-overlapping CSI-RS time-frequency resources"; "1" represents that the CSI-RS transmit power on the "overlapping CSI-RS time-frequency resources" is different from the CSI-RS transmit power on the "non-overlapping CSI-RS time-frequency resources".

[0086] Optionally, the second indication signaling is semi-static signaling or dynamic signaling.

[0087] As an example, semi-static signaling such as RRC, and dynamic signaling such as MAC-CE or PDCCH.

[0088] Furthermore, if the CSI-RS transmit power on the "overlapping CSI-RS time-frequency resources" is different from the CSI-RS transmit power on the "non-overlapping CSI-RS time-frequency resources", as an example, such as Figure 5As shown, if the target frequency-domain resources corresponding to the uplink subband partially overlap with a certain CSI subband (such as Nominal CSI subband#2) of the CSI feedback configured for the terminal, then when the terminal feeds back CSI, Nominal CSI subband#2 is used as two actual CSI subbands (that is, divided into CSI subband#2 and CSI subband#3) for CSI feedback.

[0089] By using the technical means of the embodiments of the present invention, the base station configures specific frequency-domain resources on the overall frequency-domain resources as the uplink subband and configures the overall frequency-domain resources as the downlink subband. Compared with the existing TDD system, it can not only support the simultaneous transmission and reception of uplink and downlink communication data on the base station side, reduce the downlink ACK / NACK feedback delay, improve the timeliness of downlink CSI feedback, improve the timeliness of uplink SR / BSR transmission, and improve the available time-frequency resources of the uplink, but also avoid the reduction of the overall downlink time-frequency resources, thereby minimizing the impact on downlink performance.

[0090] See Figure 6 , which is a schematic structural diagram of a wireless communication device provided by an embodiment of the present invention. An embodiment of the present invention also provides a wireless communication device 20, which is applied to the terminal side. The device 20 includes:

[0091] An uplink data sending module 21, configured to send uplink communication data to the base station by using a preset uplink subband; wherein, the preset uplink subband is a partial frequency-domain resource segment configured by the base station on the overall frequency-domain resources, denoted as the target frequency-domain resource segment;

[0092] A downlink data receiving module 22, configured to receive the downlink communication data sent by the base station by using a preset downlink subband; wherein, the preset downlink subband is the overall frequency-domain resources configured by the base station, or the frequency-domain resource segment except the target frequency-domain resource segment.

[0093] It should be noted that a wireless communication device provided by an embodiment of the present invention is used to execute all the process steps of a wireless communication method applied to the terminal side in the above embodiment. Their working principles and beneficial effects correspond one by one, so they will not be elaborated here.

[0094] An embodiment of the present invention also provides a wireless communication method, which is applied to the base station side. The method includes steps S31 and S32:

[0095] S31. Receive the uplink communication data sent by the terminal by using a preset uplink subband; wherein, the preset uplink subband is a partial frequency-domain resource segment configured by the base station on the overall frequency-domain resources, denoted as the target frequency-domain resource segment;

[0096] S32. Send downlink communication data to the terminal using a preset downlink sub-band; wherein, the preset downlink sub-band is the overall frequency domain resource configured by the base station.

[0097] Preferably, on the basis of the original TDD base station, a new uplink receiving module is added. The uplink receiving module can only be used for receiving uplink communication data and cannot be used for sending downlink communication data.

[0098] Configure the existing antennas and radio frequency channels in the base station to be used for sending downlink communication data of the base station, and configure the newly added antenna receiving module in the base station to be used for receiving uplink communication data of the base station. Therefore, the frequency domain resources corresponding to the existing antennas and radio frequency channels are the overall frequency domain resources (target frequency domain resource segment + non-target frequency domain resource segment), and the frequency domain resources corresponding to the newly added antenna receiving module are the target frequency domain resource segment.

[0099] As a preferred embodiment, the power of the base station for sending downlink communication data on the target frequency domain resource segment is less than the power for sending downlink communication data on the frequency domain resource segment outside the target frequency domain resource segment.

[0100] As a preferred embodiment, the uplink communication data includes physical uplink control channel data.

[0101] The uplink communication data includes physical uplink shared channel data with an MCS value lower than a preset threshold, and does not include physical uplink shared channel data with an MCS value higher than the preset threshold.

[0102] As a preferred embodiment, the step of sending downlink communication data to the terminal using a preset downlink sub-band includes:

[0103] Send physical downlink control channel data to the terminal using the preset downlink sub-band; wherein, the physical downlink control channel data is used to instruct the terminal to receive physical downlink shared channel data using a first frequency domain resource segment in the downlink sub-band;

[0104] When there is an overlap between the first frequency domain resource segment and the target frequency domain resource segment, generate a first indication signaling and send it to the terminal, so that the terminal receives and demodulates the physical downlink shared channel data according to the first indication signaling; wherein, the first indication signaling is used to indicate whether the terminal uses a first overlapping frequency domain resource segment to receive the physical downlink shared channel data, and the first overlapping frequency domain resource segment is the part of the first frequency domain resource segment that overlaps with the target frequency domain resource segment.

[0105] Preferably, when the first signaling indicates that the terminal uses the first overlapping frequency-domain resource segment to receive the physical downlink shared channel data, the first signaling is further used to indicate whether the power of the base station transmitting the physical downlink shared channel data on the first overlapping frequency-domain resource segment is the same as the power of the base station transmitting the physical downlink shared channel data on the first non-overlapping frequency-domain resource segment; wherein, the first non-overlapping frequency-domain resource segment is the part of the first frequency-domain resource segment that does not overlap with the target frequency-domain resource segment.

[0106] As a preferred embodiment, the transmitting of the downlink communication data to the terminal by using a preset downlink subband includes:

[0107] Transmitting, by using a second frequency-domain resource segment in the downlink subband, a channel state information reference signal CSI-RS to the terminal base station;

[0108] When the second frequency-domain resource segment overlaps with the target frequency-domain resource segment, generating a second signaling and sending it to the terminal, so that the terminal feeds back a radio channel measurement result obtained through the CSI-RS signal according to the second signaling;

[0109] Wherein, the second signaling is used to indicate whether the power of the base station transmitting the CSI-RS signal on the second overlapping frequency-domain resource segment is the same as the power of the base station transmitting the CSI-RS signal on the second non-overlapping frequency-domain resource segment; the second overlapping frequency-domain resource segment is the part of the second frequency-domain resource segment that overlaps with the target frequency-domain resource segment, and the second non-overlapping frequency-domain resource segment is the part of the second frequency-domain resource segment that does not overlap with the target frequency-domain resource segment.

[0110] Then the receiving of the uplink communication data sent by the terminal by using a preset uplink subband includes:

[0111] Receiving, by using the uplink subband, the radio channel measurement result sent by the terminal.

[0112] Preferably, when the second signaling indicates that the power of the base station transmitting the CSI-RS signal on the second overlapping frequency-domain resource segment is different from the power of the base station transmitting the CSI-RS signal on the second non-overlapping frequency-domain resource segment, the terminal can divide the CSI subband where the junction of the second overlapping frequency-domain resource segment and the second non-overlapping frequency-domain resource segment is located into two CSI subbands according to the junction for feedback of the radio channel measurement result.

[0113] An embodiment of the present invention further provides a wireless communication device, which is applied to the base station side, and the device includes:

[0114] An uplink data receiving module, configured to receive uplink communication data sent by a terminal by using a preset uplink sub-band; wherein, the preset uplink sub-band is a partial frequency-domain resource segment configured by a base station on the overall frequency-domain resource, denoted as a target frequency-domain resource segment;

[0115] A downlink data sending module, configured to send downlink communication data to the terminal by using a preset downlink sub-band; wherein, the preset downlink sub-band is the overall frequency-domain resource configured by the base station.

[0116] It should be noted that a wireless communication device provided in an embodiment of the present invention is used to execute all the process steps of a wireless communication method applied to the base station side in the above embodiment. The working principles and beneficial effects of the two correspond one by one, and thus will not be elaborated herein.

[0117] An embodiment of the present invention further provides a wireless communication system, including a base station and a terminal. The terminal is configured to execute the wireless communication method applied to the terminal side in the above embodiment. The base station is configured to execute the wireless communication method applied to the base station side in the above embodiment.

[0118] An embodiment of the present invention further provides a wireless communication device, including a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor. When the processor executes the computer program, the wireless communication method described in any one of the above embodiments is implemented.

[0119] An embodiment of the present invention further provides a computer-readable storage medium. The computer-readable storage medium includes a stored computer program. When the computer program runs, it controls a device where the computer-readable storage medium is located to execute the wireless communication method described in any one of the above embodiments.

[0120] Those of ordinary skill in the art can understand that all or part of the processes of implementing the methods in the above embodiments can be completed by instructing relevant hardware through a computer program. The program can be stored in a computer-readable storage medium. When the program is executed, it can include the processes of the embodiments of the above methods. Among them, the storage medium can be a magnetic disk, an optical disc, a read-only memory (ROM), or a random access memory (RAM), etc.

[0121] The above is the preferred embodiment of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements are also regarded as the protection scope of the present invention.

Claims

1. A wireless communication method, characterized in that, Applied to the terminal side, the method includes: Sending uplink communication data to the base station using a preset uplink sub-band; wherein, the preset uplink sub-band is a partial frequency domain resource segment configured by the base station on the overall frequency domain resource, denoted as the target frequency domain resource segment; Receiving downlink communication data sent by the base station using a preset downlink sub-band; wherein, the preset downlink sub-band is the overall frequency domain resource configured by the base station.

2. The wireless communication method according to claim 1, characterized in that, The power of the base station to send downlink communication data on the target frequency domain resource segment is less than the power to send downlink communication data on the frequency domain resource segment outside the target frequency domain resource segment.

3. The wireless communication method according to claim 1, wherein The uplink communication data includes physical uplink control channel data.

4. The wireless communication method according to claim 3, characterized in that, The uplink communication data includes physical uplink shared channel data with an MCS value lower than a preset threshold, and does not include physical uplink shared channel data with an MCS value higher than the preset threshold.

5. The wireless communication method according to claim 1, characterized in that, The receiving the downlink communication data sent by the base station using the preset downlink sub-band includes: Receiving physical downlink control channel data sent by the base station using the preset downlink sub-band; wherein, the physical downlink control channel data is used to instruct the terminal to receive physical downlink shared channel data using a first frequency domain resource segment in the downlink sub-band; Receiving a first indication signaling sent by the base station; wherein, the first indication signaling is applicable to the situation where the first frequency domain resource segment overlaps with the target frequency domain resource segment; the first indication signaling is used to indicate whether the terminal uses a first overlapping frequency domain resource segment to receive the physical downlink shared channel data, and the first overlapping frequency domain resource segment is the part of the first frequency domain resource segment that overlaps with the target frequency domain resource segment.

6. The wireless communication method according to claim 5, wherein, When the first indication signaling indicates that the terminal uses the first overlapping frequency domain resource segment to receive the physical downlink shared channel data, the first indication signaling is further used to indicate whether the power of the base station to send the physical downlink shared channel data on the first overlapping frequency domain resource segment is the same as the power to send the physical downlink shared channel data on the first non-overlapping frequency domain resource segment; wherein, the first non-overlapping frequency domain resource segment is the part of the first frequency domain resource segment that does not overlap with the target frequency domain resource segment.

7. The wireless communication method according to claim 1, wherein The receiving the downlink communication data sent by the base station using the preset downlink sub-band includes: Receiving a downlink channel state information reference signal CSI-RS sent by the base station using a second frequency domain resource segment in the downlink sub-band; The sending the uplink communication data to the base station using the preset uplink sub-band includes: Receiving a second indication signaling sent by the base station, and according to the second indication signaling, sending a wireless channel measurement result obtained through the CSI-RS signal to the base station feedback using the preset uplink sub-band; Among them, the second indication signaling is applicable to the situation where the second frequency-domain resource segment overlaps with the target frequency-domain resource segment; the second indication signaling is used to indicate whether the power of the base station transmitting the CSI-RS signal on the second overlapping frequency-domain resource segment is the same as the power of transmitting the CSI-RS signal on the second non-overlapping frequency-domain resource segment; the second overlapping frequency-domain resource segment is the part of the second frequency-domain resource segment that overlaps with the target frequency-domain resource segment, and the second non-overlapping frequency-domain resource segment is the part of the second frequency-domain resource segment that does not overlap with the target frequency-domain resource segment.

8. The wireless communication method according to claim 7, wherein Feedback the radio channel measurement result obtained through the CSI-RS signal according to the second indication signaling, including: When the second indication signaling indicates that the power of the base station transmitting the CSI-RS signal on the second overlapping frequency-domain resource segment is different from the power of transmitting the CSI-RS signal on the second non-overlapping frequency-domain resource segment, the CSI subband where the junction of the second overlapping frequency-domain resource segment and the second non-overlapping frequency-domain resource segment is located is divided into two CSI subbands according to the junction for feedback of the radio channel measurement result.

9. A wireless communication device, characterized in that, Applied to the terminal side, the device includes: An uplink data transmission module, configured to transmit uplink communication data to the base station using a preset uplink subband; wherein, the preset uplink subband is a partial frequency-domain resource segment configured by the base station on the overall frequency-domain resource, denoted as the target frequency-domain resource segment; A downlink data reception module, configured to receive downlink communication data transmitted by the base station using a preset downlink subband; wherein, the preset downlink subband is the overall frequency-domain resource configured by the base station, or the frequency-domain resource segment except the target frequency-domain resource segment.

10. A wireless communication system, characterized in that, It includes a base station and a terminal, wherein the terminal is configured to execute the wireless communication method according to any one of claims 1 to 8.

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