WO2021109147A1 - 一种频率调整方法及通信装置 - Google Patents

一种频率调整方法及通信装置 Download PDF

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Publication number
WO2021109147A1
WO2021109147A1 PCT/CN2019/123771 CN2019123771W WO2021109147A1 WO 2021109147 A1 WO2021109147 A1 WO 2021109147A1 CN 2019123771 W CN2019123771 W CN 2019123771W WO 2021109147 A1 WO2021109147 A1 WO 2021109147A1
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Prior art keywords
trp
frequency
signal
downlink signal
terminal device
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PCT/CN2019/123771
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English (en)
French (fr)
Inventor
徐明涛
高全中
胥恒
曾宇
Original Assignee
华为技术有限公司
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Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to CN201980101510.9A priority Critical patent/CN114667696B/zh
Priority to EP19955028.6A priority patent/EP4060916A4/en
Priority to PCT/CN2019/123771 priority patent/WO2021109147A1/zh
Publication of WO2021109147A1 publication Critical patent/WO2021109147A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/01—Reducing phase shift

Definitions

  • the embodiments of the present application relate to the field of communications, and in particular, to a frequency adjustment method and a communication device.
  • cell merging can be performed, that is, the coverage areas of two adjacent transmission reception points (TRP) are merged into the same cell.
  • two adjacent TRPs will both send downlink reference signals.
  • reference signals from different TRPs are superimposed and interfered on the air interface.
  • the terminal equipment can determine the superimposed signal according to the signal receiving frequency. It is impossible to obtain an accurate downlink frequency offset between the terminal equipment and a TRP.
  • the terminal device can also send the uplink signal after frequency locking according to the obtained frequency offset, so that the TRP cannot obtain accurate uplink frequency offset, and thus cannot accurately perform pre-correction, which greatly affects the transmission of uplink and downlink data, such as increasing the loss of data packets. rate.
  • the embodiments of the present application provide a frequency adjustment method and a communication device, which implement accurate pre-correction on the network side, ensure uplink and downlink transmission performance, and save pilot overhead.
  • a signal frequency adjustment method is provided, which is applied to a communication device.
  • the communication device may be a base station, including BBUs and RRUs.
  • the first TRP and the second TRP share one BBU of the base station, that is, the first TRP and the second TRP.
  • TRP are two different transceiver points of the base station.
  • the method includes: a communication device sends a first downlink signal to a terminal device via a first sending and receiving node TRP; the communication device receives an uplink signal from the terminal device via a first TRP, and the receiving frequency of the uplink signal at the first TRP is the first receiving Frequency, the sending frequency of the uplink signal at the terminal equipment is determined according to the receiving frequency of the first downlink signal at the terminal equipment; the communication device can also receive the uplink signal from the terminal equipment through the second TRP, the receiving frequency of the uplink signal at the second TRP It is the second receiving frequency.
  • the communication device sends the second downlink signal to the terminal equipment through the second TRP; the communication device sends the third downlink signal to the terminal equipment through the first TRP; wherein, the transmission frequency of the second downlink signal at the second TRP minus the second downlink signal at the first TRP Third, the value of the sending frequency of the downlink signal is equal to ⁇ f/k, where ⁇ f is the value of the first receiving frequency minus the second receiving frequency, and k is the ratio of the uplink center frequency to the downlink center frequency.
  • the method provided by the embodiment of the present application ensures the normal communication of the terminal device while saving pilot overhead.
  • the user-level frequency lock is realized based on the receiving frequency of a single TRS at the terminal device, which can avoid the frequency lock confusion caused by receiving two TRS signals at the terminal device, and then refer to the uplink of the terminal device.
  • the difference between the receiving frequency of the signal in the serving TRP and the cooperative TRP is used to modify the downlink sending frequency of the cooperative TRP, so that the receiving frequency of the downlink signal from the serving TRP and the receiving frequency of the downlink signal from the cooperative TRP are the same at the terminal equipment, realizing the user Level of pre-correction can ensure the communication performance between the terminal device and the two TRPs.
  • the sending frequency of the third downlink signal at the first TRP is equal to the sending frequency of the first downlink signal at the first TRP.
  • the network side when the network side performs pre-correction, it can only adjust the transmission frequency of the downlink signal at the second TRP, and there is no need to adjust the transmission frequency of the downlink signal at the first TRP, which reduces the network side. Processing load.
  • the transmission frequency of the downlink signal at the first TRP adjust the transmission frequency of the downlink signal at the second TRP.
  • the terminal device can receive the signals from the first TRP and the second TRP according to the frequency locked frequency after receiving the first downlink signal.
  • the TRP downlink signal does not need to be frequency-locked again to adjust the receiving frequency, which reduces the processing load of the terminal equipment.
  • the method further includes: determining the first receiving frequency according to the value of the first receiving frequency minus the second receiving frequency 2. The sending frequency of the second downlink signal at the TRP.
  • the transmission frequency of the downlink signal at the first TRP shall prevail, and the transmission frequency of the downlink signal at the second TRP is adjusted so that the second TRP
  • the value of the transmission frequency of the second downlink signal at the first TRP minus the transmission frequency of the third downlink signal at the first TRP is equal to ⁇ f/k.
  • the transmission frequency of the first downlink signal at the first TRP and the third downlink at the first TRP is f
  • the sending frequency of the second downlink signal at the second TRP is f+ ⁇ f/k.
  • the transmission frequency of the downlink signal at the first TRP is not adjusted, and may be the communication frequency f negotiated between the network side and the terminal device.
  • ⁇ f/k is sent to the second TRP, so that the third downlink signal transmission frequency at the second TRP is It is f+ ⁇ f/k.
  • k is a pre-configured parameter, which represents the ratio of the uplink center frequency to the downlink center frequency.
  • the communication device for example, BBU
  • determines ⁇ f it can also determine ⁇ f/k.
  • ⁇ f/k is sent to the second TRP (including the RRU), so that the RRU sends the third downlink signal at a frequency of (f+ ⁇ f/k) through the antenna.
  • the communication device sends a third downlink signal to the terminal device through the first TRP, including : The communication device sends a third baseband signal to the first TRP, and the third baseband signal is used by the first TRP to send a third downlink signal to the terminal device; the communication device sends a second downlink signal to the terminal device through the second TRP, including: communication device The second baseband signal is sent to the second TRP, and the second baseband signal is used by the second TRP to send the second downlink signal to the terminal device; wherein, the sending frequency of the second baseband signal minus the sending frequency of the third baseband signal is equal to ⁇ f/k.
  • the BBU can adjust the transmission frequency of the baseband signal according to the difference between the first receiving frequency and the second receiving frequency, and send the baseband signal to the RRU.
  • the RRU converts the baseband signal into a downlink signal and sends it. It can be realized that the sending frequency of the second downlink signal at the second TRP minus the sending frequency of the third downlink signal at the first TRP is equal to ⁇ f/k.
  • the sending frequency of the first downlink signal at the first TRP is f
  • the first receiving frequency and the second receiving frequency The difference in frequency is ⁇ f 2
  • the transmission frequency of the third downlink signal is f+ ⁇ f 1
  • the transmission frequency of the second downlink signal is f+ ⁇ f 1 + ⁇ f 2 ; where ⁇ f 1 is the frequency Adjustment factor.
  • the sending frequency of the first TRP and the second TRP can be adjusted. Therefore, the sending frequency of the third downlink signal at the first TRP and the sending frequency of the first downlink signal at the first TRP are not equal.
  • the communication device may also send ⁇ f 1 to the first TRP, so that the first TRP sends the first TRP The frequency of the three downstream signals is f+ ⁇ f 1 .
  • the communication device may also send ⁇ f 1 + ⁇ f 2 to the second TRP, so that the frequency at which the second TRP sends the second downlink signal is f+ ⁇ f 1 + ⁇ f 2 .
  • a communication device including: a processing unit, configured to send a first downlink signal to a terminal device through a first transmitting and receiving node TRP; and the processing unit is further configured to receive an uplink signal from the terminal device through the first TRP Signal, the receiving frequency of the uplink signal at the first TRP is the first receiving frequency, and the uplink signal is received from the terminal equipment through the second TRP, and the receiving frequency of the uplink signal at the second TRP is the second receiving frequency; the sending of the uplink signal at the terminal equipment The frequency is determined according to the receiving frequency of the first downlink signal at the terminal device; the processing unit is further configured to send a second downlink signal to the terminal device through the second TRP; send a third downlink signal to the terminal device through the first TRP; where , The value of the transmission frequency of the second downlink signal at the second TRP minus the transmission frequency of the third downlink signal at the first TRP is equal to ⁇ f/k, where ⁇ f is the value of the first receiving
  • the sending frequency of the third downlink signal at the TRP is equal to the sending frequency of the first downlink signal at the first TRP.
  • the processing unit is further configured to determine the first receiving frequency according to the value of the first receiving frequency minus the second receiving frequency 2.
  • the sending frequency of the first downlink signal at the first TRP and the third possible implementation at the first TRP are The sending frequency of the downlink signal is f, the value of the first receiving frequency minus the second receiving frequency is ⁇ f, and the sending frequency of the second downlink signal at the second TRP is f+ ⁇ f/k.
  • the communication device further includes a communication unit, and the communication unit is configured to send ⁇ f/ to the second TRP k, so that the transmission frequency of the third downlink signal at the second TRP is f+ ⁇ f/k.
  • a communication unit is further included, and the communication unit is specifically configured to: Send the third baseband signal, the third baseband signal is used for the first TRP to send the third downlink signal to the terminal device; the second baseband signal is sent to the second TRP, and the second baseband signal is used for the second TRP to send the second downlink signal to the terminal device Signal; where the value of the transmission frequency of the second baseband signal minus the transmission frequency of the third baseband signal is equal to ⁇ f/k.
  • a frequency adjustment method including: a first communication device sends a first downlink signal to a terminal device through a first TRP, and may also receive a first uplink signal from the terminal device through the first TRP, so The receiving frequency of the first uplink signal at the first TRP is the first receiving frequency.
  • the first communication device may also send the first reception frequency to the second communication device;
  • the first communication apparatus may also send a third downlink signal to the terminal device through the first TRP;
  • the second communication device receives the first uplink signal from the terminal device through the second TRP, and the receiving frequency of the first uplink signal at the second TRP is the second receiving frequency;
  • the second communication device may also receive the first reception frequency from the first communication device, and calculate the value of the first reception frequency minus the second reception frequency;
  • the second communication apparatus may also send a third downlink signal to the terminal device.
  • the value of the transmission frequency of the second downlink signal at the second TRP minus the transmission frequency of the third downlink signal at the first TRP is equal to ⁇ f/k, and the ⁇ f is the first TRP.
  • the value of a receiving frequency minus the second receiving frequency is equal to the ratio of the k uplink center frequency to the downlink center frequency.
  • a fourth aspect provides a communication device, including at least one processor and a memory, and at least one processor is coupled to the memory;
  • Memory used to store computer programs
  • At least one processor is configured to execute a computer program stored in the memory, so that the apparatus executes the method described in the first aspect or any one of the possible implementation manners of the first aspect.
  • a computer-readable storage medium stores a computer program or instruction.
  • the computer program or instruction When executed, it realizes any of the possibilities of the first aspect or the first aspect. Implement the method described in the mode.
  • FIG. 1 is a schematic diagram of a communication system provided by an embodiment of this application.
  • FIG. 2 is a schematic diagram of the structure of a network device provided by an embodiment of the application.
  • FIG. 3 is a schematic diagram of a merged networking provided by an embodiment of the application.
  • FIG. 4 is another schematic diagram of a merged networking provided by an embodiment of the application.
  • Figure 5 is a schematic diagram of deviation correction provided by an embodiment of the application.
  • Figure 6 is a schematic diagram of pre-correction provided by an embodiment of this application
  • FIG. 7 is a schematic diagram of frequency offset provided by an embodiment of the application.
  • FIG. 8 is a structural block diagram of a communication device provided by an embodiment of the application.
  • FIG. 9 is a schematic flowchart of a frequency adjustment method provided by an embodiment of the application.
  • FIG. 10 is a schematic flowchart of another frequency adjustment method provided by an embodiment of the application.
  • FIG. 11 is a schematic flowchart of another frequency adjustment method provided by an embodiment of this application.
  • FIG. 12 is another structural block diagram of a communication device provided by an embodiment of this application.
  • FIG. 13 is another structural block diagram of a communication device provided by an embodiment of this application.
  • FIG. 1 shows a schematic diagram of a communication system to which the technical solution provided by this application is applicable.
  • the communication system may include multiple network devices (only network device 100 is shown) and multiple terminal devices (only shown in the figure).
  • FIG. 1 is only a schematic diagram, and does not constitute a limitation on the applicable scenarios of the technical solutions provided in this application.
  • the network device and the terminal device can communicate through a cellular link (Uu link).
  • the network device 100 and the terminal device 201 can communicate with each other, and the terminal device can communicate through a side link (sidelink link).
  • sidelink link For communication, for example, the terminal device 201 and the terminal device 202 can communicate, and the sidelink link may include D2D communication, V2X communication, and machine type communication (MTC).
  • MTC machine type communication
  • the network device 100 may be any device with a wireless transceiving function. Including but not limited to: evolved base station in LTE (NodeB or eNB or e-NodeB, evolutional NodeB), base station in NR (gNodeB or gNB) or transmission receiving point/transmission reception point (TRP), 3GPP Subsequent evolution of base stations, access nodes in the WiFi system, wireless relay nodes, wireless backhaul nodes, etc.
  • the base station can be: a macro base station, a micro base station, a pico base station, a small station, a relay station, or a balloon station, etc. Multiple base stations can support networks of the same technology mentioned above, or networks of different technologies mentioned above.
  • the base station can contain one or more co-site or non-co-site TRPs.
  • the network device may also be a wireless controller, a centralized unit (CU), and/or a distributed unit (DU) in a cloud radio access network (cloud radio access network, CRAN) scenario.
  • the network device can also be a server, a wearable device, or a vehicle-mounted device.
  • the following description takes the network device as a base station as an example.
  • the multiple network devices may be base stations of the same type, or base stations of different types.
  • the base station can communicate with the terminal equipment, and it can also communicate with the terminal equipment through the relay station.
  • the terminal device can communicate with multiple base stations of different technologies.
  • the terminal device can communicate with a base station that supports an LTE network, can also communicate with a base station that supports a 5G network, and can also support communication with a base station of an LTE network and a base station of a 5G network. Double connection.
  • a terminal device (such as terminal device 201 or terminal device 202) is a device with wireless transceiver function, which can be deployed on land, including indoor or outdoor, handheld, wearable, or vehicle-mounted; it can also be deployed on water (such as ships, etc.) ; Can also be deployed in the air (such as aircraft, balloons and satellites, etc.).
  • the terminal may be a mobile phone (mobile phone), a tablet computer (Pad), a computer with wireless transceiver function, virtual reality (VR) terminal equipment, augmented reality (AR) terminal equipment, industrial control (industrial control) Wireless terminals in control), vehicle-mounted terminal equipment, wireless terminals in unmanned driving (self-driving), wireless terminals in remote medical (remote medical), wireless terminals in smart grid (smart grid), transportation safety (transportation safety) Wireless terminals in ), wireless terminals in smart cities, wireless terminals in smart homes, wearable terminal devices, and so on.
  • the embodiments of this application do not limit the application scenarios.
  • Terminals can sometimes be referred to as terminal equipment, user equipment (UE), access terminal equipment, vehicle-mounted terminal, industrial control terminal, UE unit, UE station, mobile station, mobile station, remote station, remote terminal equipment, mobile Equipment, UE terminal equipment, terminal equipment, wireless communication equipment, UE agent or UE device, etc.
  • the terminal can also be fixed or mobile.
  • the terminal device of the present application may also be a vehicle-mounted module, vehicle-mounted module, vehicle-mounted component, vehicle-mounted chip, or vehicle-mounted unit built into a vehicle as one or more components or units. The vehicle passes through the built-in vehicle-mounted module, vehicle-mounted module, An on-board component, on-board chip, or on-board unit can implement the method of the present application.
  • FIG. 2 is a schematic structural diagram of a network device 100 provided by an embodiment of the application.
  • the network device may be a distributed base station.
  • the network device 100 may include a baseband unit (BBU), a radio frequency unit, such as a remote radio unit (RRU), and an antenna group.
  • the RRU may be a pico RRU (pRRU), and the baseband unit may also be referred to as a baseband unit.
  • each BBU may be connected to at least one RRU through an optical fiber, and the RRU may be connected to an antenna.
  • the network device 100 includes a baseband unit 1001, a radio frequency unit 1002, a radio frequency unit 1003, an antenna group 1004, and an antenna group 1005.
  • the baseband unit 1001 and the radio frequency unit 1002 are connected, and the baseband unit 1001 and the radio frequency unit 1003 are connected.
  • the radio frequency unit 1002 is connected to the antenna group 1004, and the radio frequency unit 1003 is connected to the antenna group 1005.
  • the baseband unit is responsible for baseband processing and generates digital signals, for example, digital baseband signals or digital intermediate frequency signals;
  • the radio frequency unit mainly realizes the mutual conversion between the digital signal and the radio frequency signal, and completes the signal transmission and reception.
  • the radio frequency unit receives digital signals from the baseband unit, processes the digital signals to obtain radio frequency signals, and transmits radio frequency signals.
  • the network device may include one or more TRPs.
  • the network device 100 includes TRP200 and TRP300.
  • TRP can be understood as an entity that implements the function of receiving and sending.
  • TRP can provide cell coverage to an area or direction, so as to provide communication services for terminals in the area or direction. Different TRPs serve different areas or directions.
  • TRP can be a physical entity.
  • the one or more TRPs may share the hardware facilities of the network device.
  • the TRP includes a baseband unit, a radio frequency unit, and an antenna group.
  • TRP200 includes baseband unit 1001, radio frequency unit 1002, and antenna group 1003
  • TRP300 includes baseband unit 1001, radio frequency unit 1003, and antenna group 1004, and TRP200 and TRP300 share baseband unit 1001.
  • the radio frequency unit 1003 may be connected to two antenna groups, the TRP200 and the TRP300 may both include a baseband unit 1001 and the radio frequency unit 1003, and the TRP200 and TRP300 may further include respective antennas.
  • the TRP includes a radio frequency unit and an antenna group.
  • TRP200 includes a radio frequency unit 1002 and an antenna group 1003.
  • TRP300 includes a radio frequency unit 1003 and an antenna group 1004. Both TRP200 and TRP300 are connected to the baseband unit 1001. Or, for example, the radio frequency unit 1003 may be connected to two antenna groups, the TRP200 and the TRP300 may both include the radio frequency unit 1003, and the TRP200 and the TRP300 may further include respective antennas.
  • the TRP includes an antenna group, for example, TRP200 includes an antenna group 1003, and TRP300 includes an antenna group 1004.
  • TRP can be a logical entity.
  • the embodiment of the application does not limit this.
  • the method provided in the embodiment of the present application can be used for cell consolidation networking.
  • the so-called cell merging can be understood as merging the coverage areas of multiple different RRUs, and the merged area logically belongs to the same cell. In this way, the number of cells can be reduced, and when the terminal equipment is moving at a high speed, the number of cell handovers can be reduced and the system performance can be improved.
  • FIG 3 is a schematic diagram of a combined cell networking.
  • the networking may include terminal equipment and network equipment.
  • the network device 20 and the network device 21 may be distributed base stations.
  • the network device 20 includes a BBU 201, RRU 202, RRU 203, antenna group 204, and antenna group 205.
  • RRU 202 and antenna group 204 can form TRP 1
  • the antenna group 205 can form a TRP2;
  • the network device 21 includes a BBU 211, an RRU212, an RRU213, an antenna group 214, and an antenna group 215.
  • the RRU 212 and the antenna group 214 may form a TRP 3
  • the RRU 213 and the antenna group 215 may form a TRP 4.
  • the RRUs combined into the same logical cell are connected (connected can be understood as connected) to the same BBU.
  • the coverage areas of RRU 202 and RRU 203 may be combined into the same logical cell (cell 0), and RRU 212 and RRU 213 may be combined into the same logical cell (cell 1).
  • the network device 22 includes a BBU 221, an RRU 222, and an antenna group 223.
  • the RRU 222 and the antenna group 223 can form a TRP 5;
  • the network device 24 includes a BBU 241, RRU242, and antenna group 243, RRU242 and antenna group 243 Can form TRP 6;
  • network equipment 25 includes BBU 251, RRU 252 and antenna group 253, RRU 252 and antenna group 253 can form TRP 7;
  • network equipment 26 includes BBU 261, RRU 262 and antenna group 263, RRU 262 and antenna group 263 can form TRP 8.
  • the coverage areas of RRU 232 and RRU 242 can be combined into the same logical cell (cell 2), and RRU 252 and RRU 262 can be combined into the same logical cell (cell 3).
  • TRP includes RRU and antenna groups as an example.
  • TRP may include only antenna groups, or TRP may include BBU, RRU, and antenna groups. The embodiment of the application does not limit this.
  • the signal transmitted by the transmitting end produces a frequency offset at the receiving end.
  • the frequency deviation of the frequency of the signal received by the receiving end from the frequency of the signal sent by the transmitting end is called frequency offset.
  • the downlink signal sent by the base station generates a frequency offset after reaching the terminal equipment. This frequency offset is called a downlink frequency offset.
  • the terminal equipment can also estimate the downlink frequency offset and adjust its own crystal oscillator according to the downlink frequency offset to maintain frequency synchronization with the received signal after the frequency offset.
  • the uplink signal sent by the terminal equipment will also produce a frequency offset after reaching the base station.
  • This frequency offset is called the uplink frequency offset.
  • the base station can also estimate the uplink frequency offset and perform pre-correction based on the uplink frequency offset, that is, adjust the frequency of the transmitted signal to make the frequency offset of the received signal of the terminal device as small as possible.
  • the uplink frequency offset k*downlink frequency offset
  • K is a positive number.
  • k is a positive number less than or equal to 1.
  • k may be the ratio of the uplink center frequency to the downlink center frequency.
  • the frequency at which the base station sends the downlink signal is f
  • the frequency at which the terminal device receives the downlink signal is f+ ⁇ f.
  • the downlink frequency offset between the terminal equipment and the base station is ⁇ f, and it can be considered that the uplink frequency offset between the terminal equipment and the base station is also ⁇ f.
  • the frequency at which the terminal equipment sends the uplink signal is f
  • the frequency at which the base station receives the uplink signal is f+ ⁇ f.
  • the downlink frequency offset between the terminal equipment and the base station is ⁇ f
  • the uplink frequency offset between the terminal equipment and the base station is k* ⁇ f.
  • the frequency at which the terminal equipment sends the uplink signal is f
  • the frequency at which the base station receives the uplink signal is f+k* ⁇ f.
  • Tracking reference signal tilting reference signal
  • TRS can be used for terminal equipment to estimate the downlink frequency offset. Specifically, the base station and the terminal equipment negotiate the TRS transmission frequency f in advance, the base station transmits TRS according to the frequency f, and the terminal equipment receives the TRS according to the frequency f+ ⁇ f, then the downlink frequency offset is ⁇ f.
  • Frequency locking refers to the process in which the terminal device determines the frequency offset and then actively adjusts the crystal oscillator to match the frequency offset.
  • the base station and the terminal equipment negotiate the TRS transmission frequency f in advance, the base station transmits the TRS according to the frequency f, and the terminal equipment receives the TRS according to the frequency f+ ⁇ f.
  • the terminal equipment can be frequency-locked at f+ ⁇ f, so that the terminal equipment subsequently receives downlink data and sends uplink data at f+ ⁇ f.
  • a correction method can be adopted at the terminal.
  • the transmission frequency of the base station is f c
  • the terminal device receives the downlink signal at the frequency (f c +f d ), determines the downlink frequency offset as f d , adjusts its own crystal oscillator and other methods to correct the frequency offset f d .
  • a pre-correction method can be used at the network equipment.
  • the base station estimates the uplink frequency offset f d according to the received frequency of the uplink signal, and adjusts the transmission frequency of the downlink signal to ((f c- f d ) according to the uplink frequency offset, so that the downlink signal is superimposed on the path more After the puller frequency offset, the frequency offset is zero at the terminal equipment.
  • the terminal device when the terminal device is located between two TRPs, there is a frequency offset between the terminal device and the two TRPs.
  • the following line frequency offset is taken as an example.
  • There is a downlink frequency offset between the terminal equipment and TRP1 and TRP2 and one of the downlink frequency offsets with TRP1 and TRP2 is a positive value and the other is a negative value.
  • the downlink frequency offset between the terminal device and TRP1 is f d1
  • the downlink frequency offset between the terminal device and TRP2 is -f d2 .
  • f d1 and f d2 are both positive values.
  • a terminal device located between two TRPs can receive downlink reference signals (e.g., TRS) sent by the two TRPs (e.g., TRP1 and TRP2 shown in Figure 3).
  • the downlink reference signals from these two TRPs are one positive and one negative, and they are superimposed and interfered at the air interface.
  • the terminal equipment obtains a frequency offset according to the superimposed reference signal. But this frequency offset is not the downlink frequency offset between the terminal equipment and TRP1 and TRP2. It can be seen that the terminal device cannot obtain an accurate downlink frequency offset, and thus cannot accurately perform frequency lock.
  • the terminal device After the terminal device obtains an inaccurate downlink frequency offset, it adjusts the local crystal oscillator according to the frequency offset and sends an uplink signal. TRP estimates the uplink frequency offset based on the received uplink signal. Because the frequency of the uplink signal sent by the terminal device contains inaccurate frequency offset, the uplink frequency offset estimated by TRP based on the received uplink signal is not accurate, and there is no way to perform it accurately. Of pre-correction.
  • TRP1 and TRP2 send downlink signals at a frequency of 1000 Hz, assuming that the frequency offset between TRP1 and the terminal device is 100 Hz, and the frequency offset between TRP1 and the terminal device is -100 Hz.
  • the downlink signals from TRP1 and TRP2 at the terminal equipment are superimposed on each other, and the terminal equipment receives the downlink signal at a frequency of 1050 Hz.
  • the terminal is frequency-locked at a frequency of 1050Hz, and then sends an uplink signal at a frequency of 1050Hz.
  • TRP1 receives an uplink signal at a frequency of 1150Hz.
  • TRP1 performs pre-correction based on 75Hz. For example, sending a downlink signal at 925Hz causes the terminal device to receive a frequency of 1025Hz instead of the 1000Hz pre-negotiation between the network side and the terminal device. The pre-correction effect Bad.
  • the embodiment of the application provides a signal frequency adjustment method.
  • the serving TRP for example, on frequency f
  • the terminal device determines the service TRS according to the receiving frequency of the TRS (for example, f+ ⁇ f).
  • the downlink frequency offset for example, ⁇ f
  • the downlink frequency offset with the terminal device is frequency-locked according to the downlink frequency offset (for example, the frequency is locked at f+ ⁇ f, where f is the communication frequency configured by the terminal device), and the uplink signal is sent.
  • the serving TRP and the cooperative TRP can respectively determine the frequency at which the uplink signal is received, and then determine the frequency at which the serving TRP and the cooperative TRP send the downlink signal according to the difference between the frequency at which the serving TRP and the cooperative TRP receive the uplink signal, so as to ensure the service TRP and cooperation
  • the TRP downlink signal is received by the terminal equipment at the same time.
  • the method ensures the normal communication of the terminal device while saving pilot overhead.
  • the user-level frequency lock is realized based on the receiving frequency of a single TRS at the terminal device, which can avoid the frequency lock confusion caused by receiving two TRS signals at the terminal device, and then refer to the uplink of the terminal device.
  • the difference between the receiving frequency of the signal in the serving TRP and the cooperative TRP is used to modify the downlink sending frequency of the cooperative TRP, so that the receiving frequency of the downlink signal from the serving TRP and the receiving frequency of the downlink signal from the cooperative TRP are the same at the terminal equipment, realizing the user Level of pre-correction can ensure the communication performance between the terminal device and the two TRPs.
  • Fig. 8 is a schematic diagram of another structure of a network device.
  • the network device includes at least one processor 801, at least one memory 802, at least one transceiver 803, at least one network interface 804, and one or more antennas 805.
  • the processor 801, the memory 802, the transceiver 803 and the network interface 804 are connected, for example, by a bus.
  • the antenna 805 is connected to the transceiver 803.
  • the network interface 804 is used to connect the network device to other communication devices through the communication link, for example, the network device is connected to the core network element through the S1 interface.
  • the connection may include various interfaces, transmission lines, or buses, etc., which is not limited in this embodiment.
  • the processor in the embodiment of the present application may include at least one of the following types: a general-purpose central processing unit (Central Processing Unit, CPU), a digital signal processor (Digital Signal Processor, DSP), a microprocessor, Application-Specific Integrated Circuit (ASIC), Microcontroller Unit (MCU), Field Programmable Gate Array (FPGA), or integrated circuit used to implement logic operations .
  • the processor 801 may be a single-CPU processor or a multi-CPU processor.
  • the at least one processor 801 may be integrated in one chip or located on multiple different chips.
  • the memory in the embodiment of the present application may include at least one of the following types: read-only memory (ROM) or other types of static storage devices that can store static information and instructions, random access memory Random access memory (RAM) or other types of dynamic storage devices that can store information and instructions, or electrically erasable programmable read-only memory (EEPROM).
  • ROM read-only memory
  • RAM random access memory Random access memory
  • EEPROM electrically erasable programmable read-only memory
  • the memory can also be a compact disc read-only memory (CD-ROM) or other optical disc storage, optical disc storage (including compact discs, laser discs, optical discs, digital universal discs, Blu-ray discs, etc.) , Disk storage media or other magnetic storage devices, or any other media that can be used to carry or store desired program codes in the form of instructions or data structures and that can be accessed by a computer, but are not limited thereto.
  • CD-ROM compact disc read-only memory
  • optical disc storage including compact discs, laser discs, optical discs, digital universal discs, Blu-ray discs, etc.
  • Disk storage media or other magnetic storage devices or any other media that can be used to carry or store desired program codes in the form of instructions or data structures and that can be accessed by a computer, but are not limited thereto.
  • the memory 802 may exist independently and is connected to the processor 801.
  • the memory 802 may also be integrated with the processor 801, for example, integrated in a chip.
  • the memory 802 can store program codes for executing the technical solutions of the embodiments of the present application, and is controlled by the processor 801 to execute, and various types of computer program codes that are executed can also be regarded as drivers of the processor 801.
  • the processor 801 is configured to execute computer program codes stored in the memory 802, so as to implement the technical solutions in the embodiments of the present application.
  • the transceiver 803 may be used to support the reception or transmission of radio frequency signals between the network device and the terminal device, and the transceiver 803 may be connected to the antenna 805.
  • one or more antennas 805 can receive radio frequency signals
  • the transceiver 803 can be used to receive the radio frequency signals from the antennas, convert the radio frequency signals into digital baseband signals or digital intermediate frequency signals, and convert the digital baseband signals or
  • the digital intermediate frequency signal is provided to the processor 801, so that the processor 801 performs further processing on the digital baseband signal or digital intermediate frequency signal, such as demodulation processing and decoding processing.
  • the transceiver 803 can be used to receive a modulated digital baseband signal or digital intermediate frequency signal from the processor 801, and convert the modulated digital baseband signal or digital intermediate frequency signal into a radio frequency signal, and pass it through one or more antennas 805 Sending the radio frequency signal.
  • the transceiver 803 can selectively perform one or more stages of down-mixing processing and analog-to-digital conversion processing on the radio frequency signal to obtain a digital baseband signal or a digital intermediate frequency signal.
  • the order of precedence is adjustable.
  • the transceiver 803 can selectively perform one or more stages of up-mixing processing and digital-to-analog conversion processing on the modulated digital baseband signal or digital intermediate frequency signal to obtain a radio frequency signal, the up-mixing processing and the digital-to-analog conversion processing The order of precedence is adjustable. Digital baseband signals and digital intermediate frequency signals can be collectively referred to as digital signals.
  • the transceiver may be called a transceiver circuit, a transceiver unit, a transceiver device, a transmission circuit, a transmission unit, or a transmission device, and so on.
  • the communication device 80 may be a complete network device, a component or component that realizes the function of the network device, or a communication chip.
  • the transceiver 803 may be an interface circuit of the chip, and the interface circuit is used to read in and output baseband signals.
  • the embodiment of the application provides a signal frequency adjustment method, which is suitable for the networking shown in FIG. 3. It should be noted that the first TRP and the second TRP in FIG. 9 can provide communication services to terminal devices in different areas or directions. .
  • the communication device may include or not include the first TRP or the second TRP, which is described below in combination with two implementation modes:
  • the communication device includes a first TRP and a second TRP.
  • the communication device may include a baseband unit, a radio frequency unit, and an antenna group.
  • the first TRP and the second TRP may be radio frequency units and/or in the communication device. Or an antenna, or it can be a logical entity in a communication device.
  • the first TRP in Fig. 9 can be TRP 1 in Fig. 3, and the second TRP can be TRP 2 in Fig. 3. That is, the first TRP and the second TRP share the same BBU, which are different transceivers of the same base station. point.
  • the communication device in FIG. 9 may be the network device 20 in the network shown in FIG. 3, for example, the communication device includes a BBU 201, TRP 1, and TRP 2.
  • the communication device does not include the first TRP and the second TRP.
  • the communication device may be a baseband unit.
  • the first TRP and the second TRP may be radio frequency units and/or antennas.
  • the first TRP and the second TRP The TRP is connected to the baseband unit.
  • the first TRP in Fig. 9 can be TRP 1 in Fig. 3, and the second TRP can be TRP 2 in Fig. 3. That is, the first TRP and the second TRP share the same BBU, which are different transceivers of the same base station. point.
  • the communication device may be the BBU 201 in the network device 20, that is, the communication device does not include TRP 1 and TRP 2.
  • the method includes the following steps:
  • the communication apparatus sends a first downlink signal to a terminal device through the first TRP.
  • the terminal device when the terminal device is located between two adjacent poles, there is a frequency offset between the terminal device and the TRPs deployed on the two poles.
  • the first TRP and the second TRP described in the embodiment of the present application are deployed on adjacent poles.
  • the first TRP and the second TRP are connected to the same baseband unit (for example, BBU), and the terminal device is located between the first TRP and the second TRP, there is a frequency offset between the terminal device and the first TRP and the second TRP.
  • the first TRP is a TRP closer to the terminal device, the first TRP may also be referred to as a serving TRP, and the second TRP may also be referred to as a cooperative TRP.
  • the distance between the TRP and the terminal device may be the distance between the antenna group included in the TRP and the terminal device.
  • the first downlink signal may be a TRS signal.
  • the communication device sending the first downlink signal to the terminal device through the first TRP includes: a baseband unit generates a baseband signal, and sends the baseband signal to the first TRP.
  • the first TRP converts the baseband signal into a radio frequency signal with frequency f, and sends the radio frequency signal to the terminal device.
  • the frequency f is the transmission frequency negotiated between the network device 20 and the terminal device.
  • the communication device sends the first downlink signal to the terminal device through the first TRP, including: the baseband unit of the communication device generates a baseband signal, and sends the baseband signal to the first TRP included in the communication device.
  • the first TRP converts the baseband signal into a radio frequency signal with frequency f, and sends the radio frequency signal to the terminal device.
  • the terminal device sends a first uplink signal according to the receiving frequency of the first downlink signal.
  • the frequency of the first downlink signal is shifted during transmission, and the signal received by the terminal device is shifted from the frequency at which the first TRP sends the first downlink signal.
  • the terminal device can receive according to the shifted frequency.
  • the first uplink signal may also be sent according to the frequency-locked frequency, that is, the sending frequency of the first uplink signal at the terminal equipment is the terminal The receiving frequency of the first downlink signal at the device.
  • the terminal device may receive the first downlink signal at the shifted frequency, obtain a new frequency according to the received frequency, and then lock the frequency on the new frequency, and transmit the first uplink signal at the new frequency. signal.
  • the terminal device can add an offset value on the basis of the received frequency to obtain a new frequency.
  • the communication apparatus receives a first uplink signal from the terminal device through the first TRP, and the receiving frequency of the first uplink signal at the first TRP is the first receiving frequency.
  • the Doppler effect also occurs during the transmission of the first uplink signal.
  • the receiving frequency of the first uplink signal at the first TRP is offset from the transmitting frequency of the first uplink signal, that is, the first TRP and the terminal equipment There is an uplink frequency offset between.
  • uplink frequency offset between the first TRP and the terminal device, and the downlink frequency offset between the first TRP and the terminal device may be the same.
  • the uplink frequency offset between the first TRP and the terminal device, and the downlink frequency offset between the first TRP and the terminal device may also be different.
  • uplink frequency offset k*downlink frequency offset, where k is a positive number less than or equal to 1.
  • the transmission frequency of the first downlink signal is f
  • the frequency of the first downlink signal shifts during transmission
  • the reception frequency of the first downlink signal at the terminal device is f+ ⁇ f 1 .
  • the terminal equipment can also lock the frequency at f+ ⁇ f 1 , and send the first uplink signal according to f+ ⁇ f 1.
  • the frequency of the first uplink signal shifts during transmission
  • the receiving frequency of the first uplink signal at the first TRP is f+ 2 ⁇ f 1 .
  • ⁇ f 1 is the frequency offset (uplink frequency offset or downlink frequency offset) between the terminal equipment and the first TRP
  • ⁇ f 1 is a positive value.
  • the communication device receives the first uplink signal from the terminal device through the second TRP, and the receiving frequency of the first uplink signal at the second TRP is the second receiving frequency.
  • the Doppler effect also occurs during the transmission of the first uplink signal to the second TRP, and the reception frequency of the first uplink signal at the second TRP is also offset from the transmission frequency of the first uplink signal. That is, there is also an uplink frequency offset between the second TRP and the terminal device.
  • the uplink frequency offset between the terminal device and the first TRP and the uplink frequency offset between the terminal device and the second TRP are positive and the other is negative.
  • the absolute value of the two can be the same or different.
  • the sending frequency of the first downlink signal is f
  • the receiving frequency of the first downlink signal at the terminal device is f+ ⁇ f 1
  • the first downlink signal is received.
  • the terminal equipment can also lock the frequency at f+ ⁇ f 1 , and send the first uplink signal according to f+ ⁇ f 1.
  • the receiving frequency of the first uplink signal at the second TRP is f+ ⁇ f 1 - ⁇ f 2 .
  • - ⁇ f 2 is the uplink frequency offset or the downlink frequency offset between the terminal equipment and the second TRP
  • - ⁇ f 2 is a negative value.
  • the communication device sends a second downlink signal through the second TRP, and sends a third downlink signal to the terminal device through the first TRP.
  • the value of the transmission frequency of the second downlink signal at the second TRP minus the transmission frequency of the third downlink signal at the first TRP is equal to ⁇ f/k, and the ⁇ f is the first TRP.
  • the value of a receiving frequency minus the second receiving frequency is equal to the ratio of the k uplink center frequency to the downlink center frequency. Specifically, it can be implemented by pre-correcting one or both of the first TRP and the second TRP.
  • the uplink frequency offset between the terminal equipment and the first TRP and the downlink frequency offset between the terminal equipment and the first TRP may be the same.
  • the downlink frequency offset between the second TRP and the second TRP can also be the same. Therefore, it can be considered that the difference between the first receiving frequency and the second receiving frequency is equal to the sending frequency of the second downlink signal at the second TRP minus the total frequency.
  • the sending frequency of the third downlink signal at the first TRP and the sending frequency of the second downlink signal at the second TRP can be adjusted according to the difference between the first receiving frequency and the second receiving frequency, so that the terminal equipment
  • the receiving frequency of the third downlink signal at the location and the receiving frequency of the second downlink signal at the terminal device are the same, ensuring that the terminal device can communicate with the first TRP and the second TRP normally.
  • a single TRP sends a downlink signal to correct the frequency offset, which saves pilot overhead while avoiding superimposed interference of downlink signals from different TRPs at the terminal equipment, ensuring accurate frequency lock on the terminal side, and realizing accurate pre-correction on the network side.
  • the uplink frequency offset k*downlink frequency offset
  • the frequency at which the first downlink signal is sent through the first TRP is f
  • the frequency at which the terminal device receives the first downlink signal is f+ ⁇ f 1
  • the frequency at which the first uplink signal is sent The frequency is f+ ⁇ f 1 .
  • the frequency at which the first TRP receives the first uplink signal is f+ ⁇ f 1 +k* ⁇ f 1
  • the frequency at which the second TRP receives the first uplink signal is f+ ⁇ f 1 -k* ⁇ f 2 .
  • the difference between the two receiving frequencies is equal to k*( ⁇ f 1 + ⁇ f 2 ), and the difference between the first receiving frequency and the second receiving frequency can be considered as the difference between the upstream frequency offset of the first TRP and the second TRP.
  • ⁇ f 1 is the downlink frequency offset between the first TRP and the terminal device
  • - ⁇ f 2 is the downlink frequency offset between the second TRP and the terminal device
  • the difference between the downlink frequency offset of the first TRP and the second TRP The value is ⁇ f 1 + ⁇ f 2 .
  • the difference between the uplink frequency offset of the first TRP and the second TRP, and the difference between the downlink frequency offset of the first TRP and the second TRP are equal, and the first receiving frequency and the second receiving frequency are equal.
  • the difference of can not only represent the difference between the upstream frequency offset of the first TRP and the second TRP, but also the difference between the downstream frequency offset of the first TRP and the second TRP.
  • the difference between the sending frequency of the second downlink signal and the sending frequency of the third downlink signal is the same as the difference between the first receiving frequency and the second receiving frequency.
  • the difference between the upstream frequency offset of the first TRP and the second TRP, and the difference between the downstream frequency offset of the first TRP and the second TRP are not equal.
  • the difference may represent the difference between the upstream frequency offset of the first TRP and the second TRP, and the difference between the downstream frequency offset of the first TRP and the second TRP is: ⁇ f/k.
  • ⁇ f is the difference between the first receiving frequency and the second receiving frequency
  • ⁇ f is a positive value.
  • the difference between the sending frequency of the second downlink signal and the sending frequency of the third downlink signal is: ⁇ f/k.
  • the transmission frequency of the first TRP may not be adjusted. Therefore, the transmission frequency of the third downlink signal at the first TRP is not adjusted.
  • the sending frequency is equal to the sending frequency of the first downlink signal at the first TRP, and both are f+ ⁇ f.
  • the sending frequency of the second downlink signal at the second TRP may be determined according to the value of the first receiving frequency minus the second receiving frequency.
  • the sending frequency of the first downlink signal at the first TRP and the sending frequency of the third downlink signal at the first TRP are both f, and the first receiving frequency is subtracted from the first receiving frequency.
  • the value of the second receiving frequency is ⁇ f
  • the sending frequency of the second downlink signal at the second TRP is f+ ⁇ f/k.
  • k is a pre-configured parameter, which can be a positive number less than or equal to 1.
  • the communication device can perform pre-correction in the following two ways, including:
  • the sending frequency of the first TRP is not adjusted, and the baseband unit of the communication device sends the value of the first receiving frequency minus the second receiving frequency to the second TRP, so that the second TRP adjusts the sending frequency according to this value.
  • the second TRP adjusts the transmission frequency on the basis of the frequency f, and after adjustment, the downlink transmission frequency at the second TRP is f+ ⁇ f/k.
  • the sending frequency of the second downlink signal in the embodiment of the present application is f+ ⁇ f/k.
  • the second TRP may include an RRU and an antenna group. Send ⁇ f to the RRU, so that the RRU sends the second downlink signal at the frequency f+ ⁇ f/k through the antenna group, so that the second downlink signal is sent through the second TRP.
  • the second type is that the transmission frequency of the first TRP is not adjusted.
  • the baseband unit of the communication device adjusts the transmission frequency of the baseband signal according to the value of the first receiving frequency minus the second receiving frequency, and sends the baseband to the first TRP and the second TRP.
  • the difference in the transmission frequency of the signal is related to the value of the first receiving frequency minus the second receiving frequency.
  • the frequency adjustment can ensure that the difference between the downlink sending frequency of the second TRP minus the downlink sending frequency of the first TRP is equal to the difference between the first receiving frequency minus the second receiving frequency.
  • the baseband unit sends a third baseband signal to the first TRP, and the third baseband signal is used by the first TRP to send the third downlink signal to the terminal device.
  • the first TRP may send The third baseband signal is converted into a radio frequency signal, that is, the third downlink signal, so as to send the third downlink signal to the terminal device.
  • the baseband unit sends a second baseband signal to the second TRP, where the second baseband signal is used by the second TRP to send the second downlink signal to the terminal device; for example, the second TRP may send the second baseband signal to the terminal device.
  • the signal is converted into a radio frequency signal, that is, the second downlink signal, so as to send the second downlink signal to a terminal device.
  • the value of the transmitting frequency of the second baseband signal minus the transmitting frequency of the third baseband signal is equal to ⁇ f/k, where ⁇ f is the second receiving frequency minus the first receiving frequency value.
  • the sending frequency of the first TRP and the second TRP can be adjusted. Therefore, the sending frequency of the third downlink signal at the first TRP and the sending frequency of the first downlink signal at the first TRP are not equal.
  • the communication device may determine the transmission frequency and the second downlink signal at the second TRP according to the value of the first reception frequency minus the second reception frequency.
  • the sending frequency of the third downlink signal at the first TRP may be determined.
  • the transmitting frequency of the first downlink signal at the first TRP is f
  • the difference between the first receiving frequency and the second receiving frequency is ⁇ f 2
  • the third downlink signal is The sending frequency is f+ ⁇ f 1
  • the sending frequency of the second downlink signal is f+ ⁇ f 1 + ⁇ f 2 ; where ⁇ f 1 is a frequency adjustment factor.
  • the communication device may also send ⁇ f 1 to the first TRP, so that the frequency at which the first TRP sends the third downlink signal is f+ ⁇ f 1 .
  • the communication device may also send ⁇ f 1 + ⁇ f 2 to the second TRP, so that the frequency at which the second TRP sends the second downlink signal is f+ ⁇ f 1 + ⁇ f 2 .
  • the baseband unit when the communication device is a baseband unit, the baseband unit sends ⁇ f 1 to the first TRP and ⁇ f 1 + ⁇ f 2 to the second TRP.
  • the baseband unit of the network device sends ⁇ f 1 to the first TRP and sends ⁇ f 1 + ⁇ f 2 to the second TRP.
  • the UE is located between two adjacent poles. Two TRPs are deployed on the two poles, and the two TRPs are connected to the same BBU.
  • the TRP that the UE is close to is called the serving TRP, and the other TRP is called the cooperative TRP.
  • the service TRP to adjust the sending frequency of the cooperative TRP to realize the pre-correction on the network side.
  • the method includes the following steps:
  • the serving TRP sends a TRS according to the frequency f.
  • the UE receives the TRS according to the frequency (f+ ⁇ f 1 ) and locks the frequency on (f+ ⁇ f 1 ).
  • ⁇ f 1 is the downlink frequency offset between the UE and the serving TRP.
  • the UE sends an uplink signal according to the frequency (f+ ⁇ f 1 ).
  • the receiving frequency of the serving TRP is more than the sending frequency (f+ ⁇ f 1 ) of the UE.
  • the receiving frequency x of the serving TRP is the first receiving frequency described in the embodiment of the present application.
  • the uplink frequency offset between the UE and the cooperative TRP, and the uplink frequency offset between the UE and the serving TRP are assumed to be a positive value and a negative value.
  • the receiving frequency y of the cooperative TRP is the second receiving frequency described in the embodiment of the present application.
  • x-y is the value obtained by subtracting the second receiving frequency from the first receiving frequency described in the embodiment of the present application.
  • the BBU sends the value of x-y to the cooperative TRP.
  • the serving TRP sends a downlink signal according to the frequency f, and the UE receives the downlink signal sent by the serving TRP at a frequency (f+ ⁇ f1).
  • the receiving frequency of the UE is consistent with the frequency lock of the UE to ensure normal communication between the UE and the serving TRP.
  • the cooperative TRP sends the downlink signal according to the frequency (f+ ⁇ f1+f2), and the actual frequency of the signal received by the UE is f+ ⁇ f1, which is consistent with the frequency lock of the UE.
  • the receiving frequency of the UE is the same as the frequency lock of the UE to ensure normal communication between the UE and the cooperative TRP.
  • the embodiment of the present application also provides a signal frequency adjustment method, which is suitable for the networking shown in FIG. 4.
  • the first TRP and the second TRP in FIG. 11 may provide communication services to terminal devices in different regions or directions.
  • the communication device may include or not include the first TRP or the second TRP, which is described below in combination with two implementation modes:
  • the communication device includes a first TRP and a second TRP.
  • the communication device may include a baseband unit, a radio frequency unit, and an antenna group.
  • the first TRP and the second TRP may be radio frequency units and/or in the communication device. Or an antenna, or it can be a logical entity in a communication device.
  • the first TRP in FIG. 11 may be TRP 5 in FIG. 4, and the second TRP may be TRP 6 in FIG. 4. That is, the first TRP and the second TRP are connected to different BBUs, and are the transceiver points of different base stations.
  • the first communication device in FIG. 11 may be the network device 22 in the network shown in FIG. 4, for example, the communication device includes the BBU 221 and TRP 5; the second communication device may be the network device 23 in the network shown in FIG. 4, Including BBU 231 and TRP6. That is, the communication device includes TRP.
  • the communication device does not include the first TRP and the second TRP.
  • the communication device may be a baseband unit.
  • the first TRP and the second TRP may be radio frequency units and/or antennas.
  • the first TRP and the second TRP The TRP is connected to the baseband unit.
  • the first TRP in Fig. 11 can be TRP 5 in Fig. 4, and the second TRP can be TRP 6 in Fig. 4. That is, the first TRP and the second TRP share the same BBU, which are different transceivers of the same base station. point.
  • the first communication device in FIG. 11 may be the BBU 221 in the networking shown in FIG. 4; the second communication device may be the BBU 231 in the networking shown in FIG. 4. In other words, the communication device does not include TRP.
  • the first TRP in Figure 11 can be TRP 5 in Figure 4
  • the second TRP can be TRP 6 in Figure 4 that is, the first TRP and the second TRP are connected to different BBUs and belong to different base stations. Send and receive points.
  • the method includes the following steps:
  • the first communication apparatus sends a first downlink signal to a terminal device through a first TRP.
  • the first downlink signal may be a TRS signal.
  • the terminal device when the terminal device is located between two adjacent poles, there is a frequency offset between the terminal device and the TRPs deployed on the two poles.
  • the first TRP and the second TRP described in the embodiment of the present application are deployed on adjacent poles.
  • the terminal device When the first TRP and the second TRP are connected to different baseband units, and the terminal device is located between the first TRP and the second TRP, there is a frequency offset between the terminal device and the first TRP and the second TRP.
  • the first TRP is a TRP closer to the terminal device, the first TRP may also be referred to as a serving TRP, and the second TRP may also be referred to as a cooperative TRP. It should be noted that the distance between the TRP and the terminal device may be the distance between the antenna group included in the TRP and the terminal device.
  • the terminal device sends a first uplink signal according to the receiving frequency of the first downlink signal.
  • the frequency of the first downlink signal is shifted during transmission, and the signal received by the terminal device is shifted from the frequency at which the first TRP sends the first downlink signal.
  • the terminal device can receive according to the shifted frequency.
  • the first uplink signal may also be sent according to the frequency-locked frequency, that is, the sending frequency of the first uplink signal at the terminal equipment is the terminal The receiving frequency of the first downlink signal at the device.
  • the first communication apparatus receives a first uplink signal from the terminal device through the first TRP, and the receiving frequency of the first uplink signal at the first TRP is the first receiving frequency.
  • the Doppler effect also occurs during the transmission of the first uplink signal.
  • the receiving frequency of the first uplink signal at the first TRP is offset from the transmission frequency of the first uplink signal, that is, the first TRP and the terminal There is an upstream frequency offset between devices.
  • uplink frequency offset between the first TRP and the terminal device, and the downlink frequency offset between the first TRP and the terminal device may be the same.
  • the uplink frequency offset between the first TRP and the terminal device, and the downlink frequency offset between the first TRP and the terminal device may also be different.
  • uplink frequency offset k*downlink frequency offset, where k is a positive number less than or equal to 1.
  • the transmission frequency of the first downlink signal is f
  • the frequency of the first downlink signal shifts during transmission
  • the reception frequency of the first downlink signal at the terminal device is f+ ⁇ f 1 .
  • the terminal equipment can also lock the frequency at f+ ⁇ f 1 , and send the first uplink signal according to f+ ⁇ f 1.
  • the frequency of the first uplink signal shifts during transmission
  • the receiving frequency of the first uplink signal at the first TRP is f+ 2 ⁇ f 1 .
  • ⁇ f 1 is the frequency offset (uplink frequency offset or downlink frequency offset) between the terminal equipment and the first TRP
  • ⁇ f 1 is a positive value.
  • the second communication apparatus receives the first uplink signal from the terminal device through the second TRP, and the receiving frequency of the first uplink signal at the second TRP is the second receiving frequency.
  • the Doppler effect also occurs during the transmission of the first uplink signal to the second TRP, and the reception frequency of the first uplink signal at the second TRP is also offset from the transmission frequency of the first uplink signal. That is, there is also an uplink frequency offset between the second TRP and the terminal device.
  • the uplink frequency offset between the terminal device and the first TRP and the uplink frequency offset between the terminal device and the second TRP are positive and the other is negative.
  • the absolute value of the two can be the same or different.
  • the sending frequency of the first downlink signal is f
  • the receiving frequency of the first downlink signal at the terminal device is f+ ⁇ f 1
  • the first downlink signal is received.
  • the terminal equipment can also lock the frequency at f+ ⁇ f 1 , and send the first uplink signal according to f+ ⁇ f 1.
  • the receiving frequency of the first uplink signal at the second TRP is f+ ⁇ f 1 - ⁇ f 2 .
  • - ⁇ f 2 is the uplink frequency offset or the downlink frequency offset between the terminal equipment and the second TRP
  • - ⁇ f 2 is a negative value.
  • the second communication device receives the first reception frequency from the first communication device.
  • the second communication device after the second communication device receives the first receiving frequency from the first communication device, it can calculate the value of the first receiving frequency minus the second receiving frequency, so that pre-correction can be performed based on this value, and the second TRP transmission can be adjusted.
  • the frequency of the downlink signal After the second communication device receives the first receiving frequency from the first communication device, it can calculate the value of the first receiving frequency minus the second receiving frequency, so that pre-correction can be performed based on this value, and the second TRP transmission can be adjusted.
  • the frequency of the downlink signal is the value of the first receiving frequency minus the second receiving frequency
  • 1105 is just an implementation. No pre-correction is performed at the first TRP.
  • the first TRP still sends the third downlink signal at the sending frequency at 1101.
  • the difference between the second receiving frequency and the third receiving frequency is determined. Value for pre-correction.
  • the first communication device first sends the first receiving frequency to the second communication device, and then the second communication device can change the second receiving frequency (or the difference between the second receiving frequency and the first receiving frequency) Send to the first communication device so that both the first TRP and the second TRP perform pre-correction according to the difference between the second receiving frequency and the third receiving frequency.
  • the second communication device first sends the second receiving frequency to the first communication device, and then the first communication device performs pre-correction according to the difference between the second receiving frequency and the first receiving frequency.
  • the second communication device first sends the second receiving frequency to the first communication device, and then the first communication device may change the first receiving frequency (or the difference between the second receiving frequency and the first receiving frequency). The value) is sent to the second communication device, so that both the first TRP and the second TRP perform pre-correction according to the difference between the second receiving frequency and the third receiving frequency.
  • the second communication device sends a second downlink signal through the second TRP.
  • the first communication apparatus sends a third downlink signal to the terminal device through the first TRP.
  • the value of the transmission frequency of the second downlink signal at the second TRP minus the transmission frequency of the third downlink signal at the first TRP is equal to ⁇ f/k, and the ⁇ f is the first TRP.
  • the value of a receiving frequency minus the second receiving frequency is equal to the ratio of the k uplink center frequency to the downlink center frequency.
  • the value of the sending frequency of the second downlink signal at the first TRP and the second TRP minus the sending frequency of the third downlink signal at the first TRP is equal to ⁇ f/k, which can pass through the first TRP and the first TRP.
  • One or two of the two TRPs are implemented for pre-correction. For details, please refer to the relevant content of 1105.
  • the uplink frequency offset between the terminal equipment and the first TRP and the downlink frequency offset between the terminal equipment and the first TRP may be the same.
  • the downlink frequency offset between the second TRP and the second TRP can also be the same. Therefore, it can be considered that the difference between the first receiving frequency and the second receiving frequency is equal to the sending frequency of the second downlink signal at the second TRP minus the total frequency.
  • the sending frequency of the third downlink signal at the first TRP and the sending frequency of the second downlink signal at the second TRP can be adjusted according to the difference between the first receiving frequency and the second receiving frequency, so that the terminal equipment
  • the receiving frequency of the third downlink signal at the location and the receiving frequency of the second downlink signal at the terminal device are the same, ensuring that the terminal device can communicate with the first TRP and the second TRP normally.
  • a single TRP sends a downlink signal to correct the frequency offset, which saves pilot overhead while avoiding superimposed interference of downlink signals from different TRPs at the terminal equipment, ensuring accurate frequency lock on the terminal side, and realizing accurate pre-correction on the network side.
  • the uplink frequency offset k*downlink frequency offset
  • the frequency at which the first downlink signal is sent through the first TRP is f
  • the frequency at which the terminal device receives the first downlink signal is f+ ⁇ f 1
  • the frequency at which the first uplink signal is sent The frequency is f+ ⁇ f 1 .
  • the frequency at which the first TRP receives the first uplink signal is f+ ⁇ f 1 +k* ⁇ f 1
  • the frequency at which the second TRP receives the first uplink signal is f+ ⁇ f 1 -k* ⁇ f 2 .
  • the difference between the two receiving frequencies is equal to k*( ⁇ f 1 + ⁇ f 2 ), and the difference between the first receiving frequency and the second receiving frequency can be considered as the difference between the upstream frequency offset of the first TRP and the second TRP.
  • ⁇ f 1 is the downlink frequency offset between the first TRP and the terminal device
  • - ⁇ f 2 is the downlink frequency offset between the second TRP and the terminal device
  • the difference between the downlink frequency offset of the first TRP and the second TRP The value is ⁇ f 1 + ⁇ f 2 .
  • the difference between the uplink frequency offset of the first TRP and the second TRP, and the difference between the downlink frequency offset of the first TRP and the second TRP are equal, and the first receiving frequency and the second receiving frequency are equal.
  • the difference of can not only represent the difference between the upstream frequency offset of the first TRP and the second TRP, but also the difference between the downstream frequency offset of the first TRP and the second TRP.
  • the difference between the sending frequency of the second downlink signal and the sending frequency of the third downlink signal is the same as the difference between the first receiving frequency and the second receiving frequency.
  • the difference between the upstream frequency offset of the first TRP and the second TRP, and the difference between the downstream frequency offset of the first TRP and the second TRP are not equal.
  • the difference may represent the difference between the upstream frequency offset of the first TRP and the second TRP, and the difference between the downstream frequency offset of the first TRP and the second TRP is: ⁇ f/k.
  • ⁇ f is the difference between the first receiving frequency and the second receiving frequency
  • ⁇ f is a positive value.
  • the difference between the sending frequency of the second downlink signal and the sending frequency of the third downlink signal is: ⁇ f/k.
  • the sending frequency of the first TRP may not be adjusted. Therefore, the sending frequency of the third downlink signal at the first TRP is not adjusted. It is equal to the sending frequency of the first downlink signal at the first TRP, and may be f+ ⁇ f.
  • the sending frequency of the second downlink signal at the second TRP may be determined according to the value of the first receiving frequency minus the second receiving frequency.
  • the sending frequency of the first downlink signal at the first TRP and the sending frequency of the third downlink signal at the first TRP are both f, and the first receiving frequency is subtracted from the first receiving frequency.
  • the value of the second receiving frequency is ⁇ f
  • the sending frequency of the second downlink signal at the second TRP is f+ ⁇ f/k.
  • k is a pre-configured parameter, which can be a positive number less than or equal to 1.
  • pre-correction can be performed in the following two ways, including:
  • the first type the transmission frequency of the first TRP is not adjusted, and the second baseband unit of the second communication device transmits the value of the first receiving frequency minus the second receiving frequency to the second TRP, so that the second TRP adjusts the transmission according to this value. frequency.
  • the second TRP adjusts the transmission frequency on the basis of the frequency f, and after adjustment, the downlink transmission frequency at the second TRP is f+ ⁇ f/k.
  • the sending frequency of the second downlink signal described in the embodiment of the present application is f+ ⁇ f/k.
  • the second TRP may include an RRU and an antenna group. Send ⁇ f to the RRU, so that the RRU sends the second downlink signal at the frequency f+ ⁇ f/k through the antenna group, so that the second downlink signal is sent through the second TRP.
  • the transmission frequency of the first TRP is not adjusted.
  • the second baseband unit of the second communication device adjusts the transmission frequency of the baseband signal according to the value of the first reception frequency minus the second reception frequency, so that the transmission frequency of the first communication device is
  • the difference between the transmission frequency of the baseband signal sent by a baseband unit to the first TRP and the transmission frequency of the baseband signal sent by the second communication device to the second TRP is related to the value of the first receiving frequency minus the second receiving frequency
  • the baseband signal needs to be converted into a radio frequency signal. Frequency adjustment is not required to ensure that the downlink transmission frequency of the second TRP is subtracted from the first TRP.
  • the difference of the downlink sending frequency is equal to the difference of the first receiving frequency minus the second receiving frequency.
  • the first baseband unit sends a third baseband signal to the first TRP, and the third baseband signal is used by the first TRP to send the third downlink signal to the terminal device, for example, the first TRP
  • the third baseband signal may be converted into a radio frequency signal, that is, the third downlink signal, so as to send the third downlink signal to the terminal device.
  • the second baseband unit sends a second baseband signal to the second TRP, where the second baseband signal is used by the second TRP to send the second downlink signal to the terminal device; for example, the second TRP may send the second downlink signal to the terminal device.
  • the two baseband signals are converted into radio frequency signals, that is, the second downlink signal, so as to send the second downlink signal to the terminal device.
  • the value of the transmitting frequency of the second baseband signal minus the transmitting frequency of the third baseband signal is equal to ⁇ f/k, where ⁇ f is the second receiving frequency minus the first receiving frequency value.
  • FIG. 12 shows a possible structural schematic diagram of the communication device involved in the foregoing embodiment.
  • the communication device shown in FIG. 12 may be the communication device described in the embodiment of the present application, or may be a component of the communication device that implements the foregoing method.
  • the communication device includes a processing unit 1201 and a communication unit 1202.
  • the processing unit may be one or more processors, and the communication unit may be a transceiver.
  • the processing unit 1201 is used for supporting the communication device to perform internal processing, for example, calculating the difference between the first receiving frequency and the second receiving frequency, and/or other processes used in the technology described herein.
  • the communication unit 1202 is used to support communication between the communication device and other communication devices, for example, to support the communication device to perform step 703, step 704, and/or other processes used in the technology described herein.
  • the communication device shown in FIG. 12 may also be a chip applied to a communication device.
  • the chip may be a System-On-a-Chip (SOC) or a baseband chip with communication function.
  • the above communication unit 1202 for receiving/sending may be an interface circuit of the device for reading in baseband signals.
  • the communication unit 1202 is an interface circuit for the chip to read in baseband signals, or the communication unit 1202 is an interface circuit for the chip to output baseband signals.
  • the communication device includes: a processing module 1301 and a communication module 1302.
  • the processing module 1301 is used to control and manage the actions of the communication device, for example, to perform the steps performed by the above-mentioned processing unit 1201, and/or to perform other processes of the technology described herein.
  • the communication module 1302 is configured to perform the steps performed by the above-mentioned communication unit 1202, and supports interaction between the communication device and other devices, such as interaction with other terminal devices.
  • the communication device may further include a storage module 1303, and the storage module 1303 is used to store the program code and data of the communication device.
  • the processing module 1301 is a processor
  • the communication module 1302 is a transceiver
  • the storage module 1303 is a memory
  • the communication device is the communication device shown in FIG. 8.
  • the embodiment of the present application provides a computer-readable storage medium, and the computer-readable storage medium stores instructions; the instructions are used to execute the methods shown in FIG. 9 to FIG. 11.
  • the embodiment of the present application provides a computer program product including instructions, which when running on a communication device, enables the communication device to implement the methods shown in FIG. 9 to FIG. 11.
  • a wireless communication device in an embodiment of the present application includes: instructions stored in the wireless communication device; when the wireless communication device runs on the communication device shown in FIG. 8, FIG. 12, and FIG. The method shown in Figure 11.
  • the wireless communication device may be a chip or the like.
  • the disclosed database access device and method can be implemented in other ways.
  • the embodiments of the database access device described above are only illustrative.
  • the division of the modules or units is only a logical function division, and there may be other division methods in actual implementation, such as multiple units or
  • the components can be combined or integrated into another device, or some features can be omitted or not implemented.
  • the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, database access devices or units, and may be in electrical, mechanical or other forms.
  • the units described as separate parts may or may not be physically separate.
  • the parts displayed as units may be one physical unit or multiple physical units, that is, they may be located in one place, or they may be distributed to multiple different places. . Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments.
  • the functional units in the various embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit.
  • the above-mentioned integrated unit can be implemented in the form of hardware or software functional unit.
  • the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a readable storage medium.
  • the technical solutions of the embodiments of the present application are essentially or the part that contributes to the prior art, or all or part of the technical solutions can be embodied in the form of a software product, and the software product is stored in a storage medium. It includes several instructions to make a device (may be a single-chip microcomputer, a chip, etc.) or a processor execute all or part of the steps of the method described in each embodiment of the present application.
  • the aforementioned storage media include: U disk, mobile hard disk, ROM, RAM, magnetic disk or optical disk and other media that can store program codes.

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Abstract

本申请实施例提供一种频率调整方法及通信装置，涉及通信领域，包括：通信装置通过第一发送接收节点TRP向终端设备发送第一下行信号；通过第一TRP从终端设备接收上行信号，第一TRP处上行信号的接收频率为第一接收频率；通过第二TRP从终端设备接收上行信号，第二TRP处上行信号的接收频率为第二接收频率；通过第二TRP向终端设备发送第二下行信号；通过第一TRP向终端设备发送第三下行信号；其中，第二TRP处第二下行信号的发送频率减去第一TRP处第三下行信号的发送频率的值等于△f/k，△f为第一接收频率减去第二接收频率的值相等，k上行中心频率和下行中心频率的比率。

Description

一种频率调整方法及通信装置 技术领域
本申请实施例涉通信领域，尤其涉及一种频率调整方法及通信装置。
背景技术
在高铁、火车等终端设备快速移动的场景下，如果终端设备频繁进行小区切换会导致通信性能大幅下降。为减少因终端设备高速运动所导致的小区切换次数，可以进行小区合并，即将相邻两个传输接收节点(transmission reception point，TRP)的覆盖区域合并为同一个小区。
在合并小区组网下，两个相邻的TRP均会发送下行参考信号，对于终端设备而言，来自不同TRP的参考信号在空口叠加、干扰，终端设备根据信号接收频率可以确定叠加后的信号的频偏，无法获得终端设备与某个TRP之间准确的下行频偏。终端设备还可以根据获得的频偏锁频后发送上行信号，使得TRP无法获得准确的上行频偏，进而无法准确进行预纠偏，极大地影响了上下行数据的传输，例如增加了数据包的丢失率。
发明内容
本申请实施例提供一种频率调整方法及通信装置，在网络侧实现准确预纠偏，保证上下行传输性能的同时，节省了导频开销。
第一方面，提供一种信号频率调整方法，应用于通信装置，通信装置可以是基站，包括BBU、RRU，第一TRP和第二TRP共用所述基站的一个BBU，即第一TRP和第二TRP是所述基站的两个不同的收发点。所述方法包括：通信装置通过第一发送接收节点TRP向终端设备发送第一下行信号；通信装置通过第一TRP从终端设备接收上行信号，第一TRP处上行信号的接收频率为第一接收频率，终端设备处上行信号的发送频率是根据终端设备处第一下行信号的接收频率确定的；通信装置还可以通过第二TRP从终端设备接收上行信号，第二TRP处上行信号的接收频率为第二接收频率。通信装置通过第二TRP向终端设备发送第二下行信号；通信装置通过第一TRP向终端设备发送第三下行信号；其中，第二TRP处第二下行信号的发送频率减去第一TRP处第三下行信号的发送频率的值等于△f/k，△f为第一接收频率减去第二接收频率的值相等，k上行中心频率和下行中心频率的比率。
本申请实施例提供的方法中，仅通过一个TRP发送TRS，避免来自不同TRP的TRS在终端设备处相互叠加，从而可以获得准确的频偏。相比现有技术两个TRP下发TRS纠正频偏的方案，本申请实施例提供的方法在保证终端设备正常通信的同时，节约了导频开销。另一方面，通过上述方法中，基于终端设备处单个TRS的接收频率实现了用户级的锁频，可以避免终端设备处接收两个TRS信号带来的锁频混乱，再参考该终端设备的上行信号在服务TRP、协作TRP的接收频率的差值来修改协作TRP的下行发送频率，使得终端设备处来自服务TRP的下行信号的接收频率、来自协作TRP的下行信号的接收频率相同，实现了用户级的预纠偏，从而可以保证终端设备与两个TRP之间的通信性能。
结合第一方面，在第一方面的第一种可能的实现方式中，第一TRP处第三下行信号的发送频率和第一TRP处第一下行信号的发送频率相等。
本申请实施例提供的方法中，网络侧进行预纠偏时，可以仅对第二TRP处下行信号的发送频率进行调整，不需要对第一TRP处下行信号的发送频率进行调整，降低了网络侧的处理负荷。此外，以第一TRP处下行信号的发送频率为准，调整第二TRP处下行信号的发送频率，终端设备可以根据接收第一下行信号后的锁频的频率接收来自第一TRP、第二TRP的下行信号，无需再次锁频以调整接收频率，降低了终端设备的处理负荷。
结合第一方面的第一种可能的实现方式中，在第一方面的第二种可能的实现方式中，所述方法还包括：根据第一接收频率减去第二接收频率的值，确定第二TRP处第二下行信号的发送频率。
本申请实施例提供的方法中，当仅调整第二TRP处下行信号的发送频率，以第一TRP处下行信号的发送频率为准，调整第二TRP处下行信号的发送频率，使得第二TRP处第二下行信号的发送频率减去第一TRP处第三下行信号的发送频率的值等于△f/k。
结合第一方面的第一或第二种可能的实现方式，在第一方面的第三种可能的实现方式中，第一TRP处第一下行信号的发送频率和第一TRP处第三下行信号的发送频率均为f，第二TRP处第二下行信号的发送频率为f+△f/k。
本申请实施例提供的方法中，第一TRP处下行信号的发送频率不做调整，可以是网络侧与终端设备协商的通信频率f。
结合第一方面的第三种可能的实现方式，在第一方面的第四种可能的实现方式中，向第二TRP发送△f/k，以使得第二TRP处第三下行信号的发送频率为f+△f/k。
本申请实施例提供的方法中，k是预配置的参数，表示上行中心频率和下行中心频率的比率。通信装置(例如，BBU)确定△f后，还可以确定△f/k。从而将△f/k发送给第二TRP(包括RRU)，使得RRU通过天线在频率为(f+△f/k)发送第三下行信号。
结合第一方面或第一方面的第一至第四种可能的实现方式，在第一方面的第五种可能的实现方式中，通信装置通过第一TRP向终端设备发送第三下行信号，包括：通信装置向第一TRP发送第三基带信号，第三基带信号用于第一TRP向终端设备发送第三下行信号；通信装置通过第二TRP向终端设备发送第二下行信号，包括：通信装置向第二TRP发送第二基带信号，第二基带信号用于第二TRP向终端设备发送第二下行信号；其中，第二基带信号的发送频率减去第三基带信号的发送频率的值等于△f/k。
本申请实施例提供的方法中，BBU可以根据第一接收频率与第二接收频率的差值调整基带信号的发送频率，将基带信号发送给RRU，RRU将基带信号转化成下行信号并发送，就可以实现第二TRP处第二下行信号的发送频率减去第一TRP处第三下行信号的发送频率的值等于△f/k。
结合第一方面，在第一方面的第六种可能的实现方式中，所述第一TRP处所述第一下行信号的发送频率为f，所述第一接收频率与所述第二接收频率的差值为△f 2，所述第三下行信号的发送频率为f+△f 1，所述第二下行信号的发送频率为f+△f 1+△f 2；其中，△f 1为频率调整因子。可选的，通信装置根据第一接收频率、第二接收频率的差值 进行预纠偏时，可以对第一TRP、第二TRP的发送频率进行调整。因此，所述第一TRP处所述第三下行信号的发送频率和所述第一TRP处所述第一下行信号的发送频率不相等。
结合第一方面的第六种可能的实现方式，在第一方面的第七种可能的实现方式中，所述通信装置还可以向所述第一TRP发送△f 1，使得第一TRP发送第三下行信号的频率为f+△f 1。所述通信装置还可以向所述第二TRP发送△f 1+△f 2，使得第二TRP发送第二下行信号的频率为f+△f 1+△f 2。
第二方面，提供了一种通信装置，包括：处理单元，用于通过第一发送接收节点TRP向终端设备发送第一下行信号；处理单元还用于，通过第一TRP从终端设备接收上行信号，第一TRP处上行信号的接收频率为第一接收频率，通过第二TRP从终端设备接收上行信号，第二TRP处上行信号的接收频率为第二接收频率；终端设备处上行信号的发送频率是根据终端设备处第一下行信号的接收频率确定的；处理单元还用于，通过第二TRP向终端设备发送第二下行信号；通过第一TRP向终端设备发送第三下行信号；其中，第二TRP处第二下行信号的发送频率减去第一TRP处第三下行信号的发送频率的值等于△f/k，△f为第一接收频率减去第二接收频率的值相等，k上行中心频率和下行中心频率的比率。
结合第二方面，在第二方面的第一种可能的实现方式中，TRP处第三下行信号的发送频率和第一TRP处第一下行信号的发送频率相等。
结合第一方面的第一种可能的实现方式，在第二方面的第二种可能的额实现方式中，处理单元还用于，根据第一接收频率减去第二接收频率的值，确定第二TRP处第二下行信号的发送频率。
结合第一方面的第一或第二种可能的实现方式，在第二方面的第三种可能的额实现方式中，第一TRP处第一下行信号的发送频率和第一TRP处第三下行信号的发送频率均为f，第一接收频率减去第二接收频率的值为△f，第二TRP处第二下行信号的发送频率为f+△f/k。
结合第一方面的第三种可能的实现方式，在第二方面的第四种可能的额实现方式中，所述通信装置还包括通信单元，通信单元用于，向第二TRP发送△f/k，以使得第二TRP处第三下行信号的发送频率为f+△f/k。
结合第一方面或第一方面的第一至第四种可能的实现方式，在第二方面的第五种可能的额实现方式中，还包括通信单元，通信单元具体用于，向第一TRP发送第三基带信号，第三基带信号用于第一TRP向终端设备发送第三下行信号；向第二TRP发送第二基带信号，第二基带信号用于第二TRP向终端设备发送第二下行信号；其中，第二基带信号的发送频率减去第三基带信号的发送频率的值等于△f/k。
第三方面，提供了一种频率调整方法，包括：第一通信装置通过第一TRP向终端设备发送第一下行信号，还可以通过第一TRP从所述终端设备接收第一上行信号，所述第一TRP处所述第一上行信号的接收频率为第一接收频率。
第一通信装置还可以向第二通信装置发送第一接收频率；
第一通信装置还可以通过所述第一TRP向所述终端设备发送第三下行信号；
第二通信装置通过第二TRP从所述终端设备接收第一上行信号，所述第二TRP 处所述第一上行信号的接收频率为第二接收频率；
第二通信装置还可以从第一通信装置接收所述第一接收频率，计算第一接收频率减去第二接收频率的值；
第二通信装置还可以向所述终端设备发送第三下行信号。
其中，所述第二TRP处所述第二下行信号的发送频率减去所述第一TRP处所述第三下行信号的发送频率的值等于△f/k，所述△f为所述第一接收频率减去所述第二接收频率的值相等，所述k上行中心频率和下行中心频率的比率。
第四方面提供了一种通信装置，包括至少一个处理器和存储器，至少一个处理器与存储器耦合；
存储器，用于存储计算机程序；
至少一个处理器，用于执行存储器中存储的计算机程序，以使得装置执行如第一方面或第一方面的任意一种可能的实现方式所述的方法。
第五方面，提供了一种计算机可读存储介质，计算机可读存储介质存储有计算机程序或指令，当计算机程序或指令被运行时，实现如第一方面或第一方面的任意一种可能的实现方式所述的方法。
附图说明
图1为本申请实施例提供的通信系统的示意图；
图2为本申请实施例提供的网络设备的结构示意图；
图3为本申请实施例提供的合并组网的示意图；
图4为本申请实施例提供的合并组网的另一示意图；
图5为本申请实施例提供的纠偏示意图；
图6为本申请实施例提供的预纠偏示意图
图7为本申请实施例提供的频偏示意图；
图8为本申请实施例提供的通信装置的结构框图；
图9为本申请实施例提供的频率调整方法的流程示意图；
图10为本申请实施例提供的频率调整方法的另一流程示意图；
图11为本申请实施例提供的频率调整方法的另一流程示意图；
图12为本申请实施例提供的通信装置的另一结构框图；
图13为本申请实施例提供的通信装置的另一结构框图。
具体实施方式
图1给出了本申请提供的技术方案所适用的一种通信系统的示意图，该通信系统可以包括多个网络设备(仅示出了网络设备100)以及多个终端设备(图中仅示出了终端设备201和终端设备202)。图1仅为示意图，并不构成对本申请提供的技术方案的适用场景的限定。
其中，网络设备和终端设备之间可以通过蜂窝链路(Uu链路)进行通信，例如网络设备100和终端设备201之间进行通信，终端设备之间可以通过侧行链路(sidelink链路)进行通信，例如终端设备201和终端设备202可以进行通信，sidelink链路通过可以包括D2D通信、V2X通信和机器类型通信(machine type communication，MTC)等。
网络设备100可以是任意一种具有无线收发功能的设备。包括但不限于：LTE中的演进型基站(NodeB或eNB或e-NodeB，evolutional Node B)，NR中的基站(gNodeB或gNB)或收发点(transmission receiving point/transmission reception point,TRP)，3GPP后续演进的基站，WiFi系统中的接入节点，无线中继节点，无线回传节点等。基站可以是：宏基站，微基站，微微基站，小站，中继站，或，气球站等。多个基站可以支持上述提及的同一种技术的网络，也可以支持上述提及的不同技术的网络。基站可以包含一个或多个共站或非共站的TRP。网络设备还可以是云无线接入网络(cloud radio access network，CRAN)场景下的无线控制器、集中单元(centralized unit，CU)，和/或分布单元(distributed unit,DU)。网络设备还可以是服务器，可穿戴设备，或车载设备等。以下以网络设备为基站为例进行说明。所述多个网络设备可以为同一类型的基站，也可以为不同类型的基站。基站可以与终端设备进行通信，也可以通过中继站与终端设备进行通信。终端设备可以与不同技术的多个基站进行通信，例如，终端设备可以与支持LTE网络的基站通信，也可以与支持5G网络的基站通信，还可以支持与LTE网络的基站以及5G网络的基站的双连接。
终端设备(例如终端设备201或终端设备202)是一种具有无线收发功能的设备，可以部署在陆地上，包括室内或室外、手持、穿戴或车载；也可以部署在水面上(如轮船等)；还可以部署在空中(例如飞机、气球和卫星上等)。所述终端可以是手机(mobile phone)、平板电脑(Pad)、带无线收发功能的电脑、虚拟现实(virtual reality，VR)终端设备、增强现实(augmented reality，AR)终端设备、工业控制(industrial control)中的无线终端、车载终端设备、无人驾驶(self driving)中的无线终端、远程医疗(remote medical)中的无线终端、智能电网(smart grid)中的无线终端、运输安全(transportation safety)中的无线终端、智慧城市(smart city)中的无线终端、智慧家庭(smart home)中的无线终端、可穿戴终端设备等等。本申请的实施例对应用场景不做限定。终端有时也可以称为终端设备、用户设备(user equipment，UE)、接入终端设备、车载终端、工业控制终端、UE单元、UE站、移动站、移动台、远方站、远程终端设备、移动设备、UE终端设备、终端设备、无线通信设备、UE代理或UE装置等。终端也可以是固定的或者移动的。本申请的终端设备还可以是作为一个或多个部件或者单元而内置于车辆的车载模块、车载模组、车载部件、车载芯片或者车载单元，车辆通过内置的所述车载模块、车载模组、车载部件、车载芯片或者车载单元可以实施本申请的方法。
图2为本申请实施例提供的网络设备100的结构示意图，网络设备可以是分布式基站。如图2所示，网络设备100可以包含基带单元(base band unit，BBU)、射频单元，例如拉远射频单元(remote radio unit，RRU)，以及天线组。其中，RRU可以是微小拉远射频单元(pico RRU，pRRU)，基带单元还可以称为基带单元。具体地，每个BBU可以与至少一个RRU连接之间通过光纤连接，RRU可以与天线连接。例如，在图2中，网络设备100包括基带单元1001、射频单元1002、射频单元1003、天线组1004和天线组1005，其中，基带单元1001和射频单元1002连接，基带单元1001和射频单元1003连接，射频单元1002和天线组1004连接，射频单元1003和天线组1005连接。
其中，基带单元负责基带处理，生成数字信号，例如，数字基带信号或数字中频 信号；
射频单元主要实现数字信号与射频信号之间的相互转换，完成信号的发射和接收。例如，射频单元从基带单元接收数字信号，对数字信号进行处理获得射频信号并发送射频信号。
网络设备可以包括一个或者多个TRP。例如，网络设备100包括TRP200和TRP300。
TRP可以理解为实现接收发送功能的实体，TRP可以向一区域或者一方向提供小区覆盖，从而为该区域或者方向的终端提供通信服务。不同的TRP服务的区域或者方向可以不同。
作为一种实现方式，TRP可以是物理实体。
可选的，在该实现方式下，该一个或者多个TRP可以共用网络设备的硬件设施。
可选的，TRP包括基带单元、射频单元和天线组。例如，TRP200包括基带单元1001、射频单元1002和天线组1003，TRP300包括基带单元1001、射频单元1003和天线组1004，TRP200和TRP300共用基带单元1001。或者，例如，射频单元1003可以连接两个天线组，TRP200和TRP300可以都包括基带单元1001和射频单元1003，且TRP200和TRP300分别还包括各自的天线。
可选的，TRP包括射频单元和天线组，例如，TRP200包括射频单元1002和天线组1003，TRP300包括射频单元1003和天线组1004，TRP200和TRP300均连接到基带单元1001。或者，例如，射频单元1003可以连接两个天线组，TRP200和TRP300可以都包括射频单元1003，且TRP200和TRP300分别还包括各自的天线。
可选的，TRP包括天线组，例如，TRP200包括天线组1003，TRP300包括天线组1004。
作为另一种实现方式，TRP可以是逻辑实体。本申请实施例对此不做限制。
本申请实施例提供的方法可用于小区合并组网。所谓小区合并，可以理解为将多个不同RRU的覆盖区域进行合并，合并后的区域逻辑上归属于同一个小区。这样可以减少小区的数目，当终端设备高速运动时，可以减少小区切换次数，提升系统性能。
图3是一种合并小区组网的示意图，参考图3，该组网可以包括终端设备以及网络设备。其中，网络设备20和网络设备21可以是分布式基站，网络设备20包括BBU 201、RRU 202、RRU 203、天线组204以及天线组205，RRU 202和天线组204可以组成TRP 1，RRU 203和天线组205可以组成TRP 2；网络设备21包括BBU 211、RRU212、RRU213、天线组214以及天线组215。RRU 212和天线组214可以组成TRP 3，RRU 213和天线组215可以组成TRP 4。
在一种组网方式中，合并为同一个逻辑小区的RRU接于(接于可以理解为连接)同一个BBU。示例的，参考图4，RRU 202、RRU 203的覆盖区域可以合并为同一个逻辑小区(cell 0)，RRU 212、RRU 213可以合并为同一个逻辑小区(cell 1)。
另一种组网方式中，合并为同一个逻辑小区的RRU接于不同的BBU。示例的，参考图4，网络设备22包括BBU 221、RRU 222以及天线组223，RRU 222以及天线组223可以组成TRP 5；网络设备24包括BBU 241、RRU242以及天线组243，RRU242以及天线组243可以组成TRP 6；网络设备25包括BBU 251、RRU 252以及天线组253，RRU 252以及天线组253可以组成TRP 7；网络设备26包括BBU 261、RRU262 以及天线组263，RRU262以及天线组263可以组成TRP 8。其中，RRU 232、RRU 242的覆盖区域可以合并为同一个逻辑小区(cell 2)，RRU 252、RRU 262可以合并为同一个逻辑小区(cell 3)。
需要说明的是，图3和图4中，以TRP包括RRU和天线组为例进行了介绍，本领域技术人员可以理解，TRP可以仅仅包括天线组，或者TRP可以包括BBU、RRU和天线组，本申请实施例对此不作限制。
下面对本申请实施例涉及的术语进行解释说明：
(1)频偏
受多谱勒效应影响，发送端发射的信号在接收端产生频率偏移，接收端接收信号的频率较发送端发送信号的频率的偏移称为频偏。以基站、终端设备为例，基站发送的下行信号到达终端设备后产生频偏，这个频偏称为下行频偏。为提高解调性能，终端设备还可以估计下行频偏，根据下行频偏调整自身晶振，以和频偏之后的接收信号保持频率同步。
此外，终端设备发送的上行信号到达基站后也会产生频偏，这个频偏称为上行频偏。为了提升系统性能，基站也可以估计上行频偏，并根据上行频偏进行预纠偏，即调整发射信号的频率，使终端设备的接收信号的频偏尽可能的小。
需要说明的是，上行频偏＝k*下行频偏，K为正数。对于支持TDD制式的通信系统，k＝1。对于支持FDD制式的通信系统k为小于等于1的正数。具体地，k可以是上行中心频率和下行中心频率的比率。
示例的，基站发送下行信号的频率为f，终端设备接收下行信号的频率为f+△f。终端设备与基站之间的下行频偏为△f，可以认为终端设备与基站之间的上行频偏也是△f。例如，终端设备发送上行信号的频率为f，基站接收上行信号的频率为f+△f。
或者，终端设备与基站之间的下行频偏为△f，终端设备与基站之间的上行频偏为k*△f。例如，终端设备发送上行信号的频率为f，基站接收上行信号的频率为f+k*△f。
(2)跟踪参考信号(tracking reference signal，TRS)
TRS可以用于终端设备估计下行频偏。具体地，基站和终端设备预先协商了TRS的发送频率f，基站按照频率f发送TRS，终端设备根据频率f+△f接收到了TRS，则下行频偏为△f。
(3)锁频
锁频指的是终端设备确定频偏然后主动调节晶振匹配频偏的过程。示例的，基站和终端设备预先协商了TRS的发送频率f，基站按照频率f发送TRS，终端设备根据频率f+△f接收到了TRS。为了更好地接收基站发送的下行信号，终端设备可以锁频在f+△f，从而终端设备后续均在f+△f接收下行数据和发送上行数据。
(4)纠偏
为了解决多普特效应产生的频偏，可以采用在终端处采用纠偏的方式。示例的，参考图5，基站的发送频率为f c，终端设备在频率(f c+f d)接收到下行信号，确定下行频偏为f d，调整自身晶振等方式纠正频偏f d。
(5)预纠偏
为了解决多普特效应产生的频偏，可以采用在网络设备处采用预纠偏的方式。示 例的，参考图6，基站根据上行信号的接收频率估计出上行频偏f d，根据上行频偏调整下行信号的发送频率为((f c-f d)，使得下行信号在路径上叠加多普勒频偏后，在终端设备处频偏为零。
图3或图4所示的组网下，终端设备位于两个TRP之间时，终端设备与两个TRP之间均存在频偏。示例的，参考图7，以下行频偏为例，终端设备与TRP1、TRP2之间均存在下行频偏，且与TRP1、TRP2之间的下行频偏一个是正值，一个是负值。例如，终端设备与TRP1之间的下行频偏为f d1，终端设备与TRP2之间的下行频偏为-f d2。其中，f d1和f d2均为正值。
在图3或图4所示的组网下，位于两个TRP之间的终端设备可以接收这两个TRP(例如，图3所示的TRP1、TRP2)发送的下行参考信号(例如，TRS)来自这两个TRP的下行参考信号一正一负，在空口叠加、干扰，终端设备根据叠加后的参考信号得到一个频偏。但是这个频偏并不是终端设备与TRP1、TRP2之间的下行频偏。可见，终端设备无法获得准确的下行频偏，也就无法准确进行锁频。
此外，终端设备得出不准确的下行频偏后，根据该频偏调整本地晶振后发送上行信号。TRP根据接收到的上行信号估计出上行频偏，由于终端设备发送上行信号的频率包含不准确的频偏，导致TRP根据接收到的上行信号估计出的上行频偏也不准确，没有办法进行准确的预纠偏。
示例的，TRP1、TRP2在频率1000Hz发送下行信号，假设TRP1与终端设备之间的频偏100Hz，TRP1与终端设备之间的频偏-100Hz。终端设备处来自TRP1、TRP2的下行信号相互叠加，终端设备在频率1050Hz接收到下行信号。终端锁频在频率1050Hz上，然后在频率1050Hz发送上行信号，TRP1在频率1150Hz接收到上行信号，假设上下行频偏相同，TRP1计算出的频偏为(1150Hz-1000Hz)/2＝75Hz，与终端设备与TRP1之间的实际频偏不同，TRP1根据75Hz进行预纠偏，例如，在925Hz发送下行信号，从而导致终端设备接收频率为1025Hz而不是网络侧与终端设备预先协商的1000Hz，预纠偏效果不佳。
本申请实施例提供一种信号频率调整方法，在进行频率纠偏时，只有服务TRP(例如在频率f上)向终端设备发送TRS，终端设备根据TRS的接收频率(例如f+△f)确定服务TRP与终端设备之间的下行频偏(例如△f)，根据该下行频偏锁频(例如锁频在f+△f，f为终端设备配置的通信频率)，并发送上行信号。服务TRP和协作TRP可以分别确定接收到该上行信号的频率，然后根据服务TRP和协作TRP接收到上行信号的频率的差值确定服务TRP和协作TRP发送下行信号的频率，以保证服务TRP和协作TRP的下行信号同时被终端设备接收。
一方面，通过上述方法中，仅通过一个TRP发送TRS，避免来自不同TRP的TRS在终端设备处相互叠加，从而可以获得准确的频偏。相比现有技术两个TRP下发TRS纠正频偏的方案，本申请实施例提供的方法在保证终端设备正常通信的同时，节约了导频开销。
另一方面，通过上述方法中，基于终端设备处单个TRS的接收频率实现了用户级的锁频，可以避免终端设备处接收两个TRS信号带来的锁频混乱，再参考该终端设备的上行信号在服务TRP、协作TRP的接收频率的差值来修改协作TRP的下行发送频 率，使得终端设备处来自服务TRP的下行信号的接收频率、来自协作TRP的下行信号的接收频率相同，实现了用户级的预纠偏，从而可以保证终端设备与两个TRP之间的通信性能。
图8是一种网络设备的另一结构示意图。参考图8，网络设备包括至少一个处理器801、至少一个存储器802、至少一个收发器803、至少一个网络接口804和一个或多个天线805。处理器801、存储器802、收发器803和网络接口804相连，例如通过总线相连。天线805与收发器803相连。网络接口804用于使得网络设备通过通信链路，与其它通信设备相连，例如网络设备通过S1接口，与核心网网元相连。在本申请实施例中，所述连接可包括各类接口、传输线或总线等，本实施例对此不做限定。
本申请实施例中的处理器，例如处理器801，可以包括如下至少一种类型：通用中央处理器(Central Processing Unit，CPU)、数字信号处理器(Digital Signal Processor，DSP)、微处理器、特定应用集成电路专用集成电路(Application-Specific Integrated Circuit，ASIC)、微控制器(Microcontroller Unit，MCU)、现场可编程门阵列(Field Programmable Gate Array，FPGA)、或者用于实现逻辑运算的集成电路。例如，处理器801可以是一个单核(single-CPU)处理器或多核(multi-CPU)处理器。至少一个处理器801可以是集成在一个芯片中或位于多个不同的芯片上。
本申请实施例中的存储器，例如存储器802，可以包括如下至少一种类型：只读存储器(read-only memory，ROM)或可存储静态信息和指令的其他类型的静态存储设备，随机存取存储器(random access memory，RAM)或者可存储信息和指令的其他类型的动态存储设备，也可以是电可擦可编程只读存储器(Electrically erasable programmabler-only memory，EEPROM)。在某些场景下，存储器还可以是只读光盘(compact disc read-only memory，CD-ROM)或其他光盘存储、光碟存储(包括压缩光碟、激光碟、光碟、数字通用光碟、蓝光光碟等)、磁盘存储介质或者其他磁存储设备、或者能够用于携带或存储具有指令或数据结构形式的期望的程序代码并能够由计算机存取的任何其他介质，但不限于此。
存储器802可以是独立存在，与处理器801相连。可选的，存储器802也可以和处理器801集成在一起，例如集成在一个芯片之内。其中，存储器802能够存储执行本申请实施例的技术方案的程序代码，并由处理器801来控制执行，被执行的各类计算机程序代码也可被视为是处理器801的驱动程序。例如，处理器801用于执行存储器802中存储的计算机程序代码，从而实现本申请实施例中的技术方案。
收发器803可以用于支持网络设备与终端设备之间射频信号的接收或者发送，收发器803可以与天线805相连。具体地，一个或多个天线805可以接收射频信号，该收发器803可以用于从天线接收所述射频信号，并将射频信号转换为数字基带信号或数字中频信号，并将该数字基带信号或数字中频信号提供给所述处理器801，以便处理器801对该数字基带信号或数字中频信号做进一步的处理，例如解调处理和译码处理。此外，收发器803可以用于从处理器801接收经过调制的数字基带信号或数字中频信号，并将该经过调制的数字基带信号或数字中频信号转换为射频信号，并通过一个或多个天线805发送所述射频信号。具体地，收发器803可以选择性地对射频信号进行一级或多级下混频处理和模数转换处理以得到数字基带信号或数字中频信号，所 述下混频处理和模数转换处理的先后顺序是可调整的。收发器803可以选择性地对经过调制的数字基带信号或数字中频信号时进行一级或多级上混频处理和数模转换处理以得到射频信号，所述上混频处理和数模转换处理的先后顺序是可调整的。数字基带信号和数字中频信号可以统称为数字信号。收发器可以称为收发电路、收发单元、收发器件、发送电路、发送单元或者发送器件等等。
需要说明的是，通信装置80可以是网络设备整机，也可以是实现网络设备功能的部件或组件，也可以是通信芯片。当通信装置80为通信芯片，收发器803可以是该芯片的接口电路，该接口电路用于读入和输出基带信号。
本申请实施例提供一种信号频率调整方法，适用于图3所示的组网，需要说明的是，图9中第一TRP和第二TRP可以向不同的区域或者方向的终端设备提供通信服务。通信装置可以包括或者不包括第一TRP或者第二TRP，下面结合两种实现方式进行说明：
作为第一种实现方式，通信装置包括第一TRP和第二TRP，此时通信装置可以包括基带单元、射频单元和天线组，第一TRP和第二TRP可以是通信装置中的射频单元和/或者天线，或者可以是通信装置中逻辑实体。
例如，图9中的第一TRP可以是图3中的TRP 1，第二TRP可以是图3中的TRP 2，即第一TRP、第二TRP共用同一个BBU，是同一个基站的不同收发点。图9中的通信装置可以是图3所示组网中的网络设备20，例如通信装置包括BBU 201、TRP 1和TRP 2。
作为第二种实现方式，通信装置不包括第一TRP和第二TRP，此时通信装置可以是基带单元，第一TRP和第二TRP可以是射频单元和/或者天线，第一TRP和第二TRP均与基带单元连接。
例如，图9中的第一TRP可以是图3中的TRP 1，第二TRP可以是图3中的TRP 2，即第一TRP、第二TRP共用同一个BBU，是同一个基站的不同收发点。通信装置可以是网络设备20中的BBU 201，也就是说通信装置不包括TRP 1和TRP 2。
如图9所示，所述方法包括以下步骤：
901、通信装置通过第一TRP向终端设备发送第一下行信号。
在图3所示的组网场景下，当终端设备位于相邻两个抱杆之间，终端设备与这两个抱杆上部署的TRP之间均存在频偏。示例的，本申请实施例所述的第一TRP、第二TRP部署在相邻的抱杆上。第一TRP和第二TRP接于同一个基带单元(例如，BBU)，终端设备位于第一TRP和第二TRP之间时，终端设备与第一TRP和第二TRP之间均存在频偏。第一TRP是距离终端设备更近的TRP，第一TRP还可以称为服务TRP，第二TRP还可以称为协作TRP。需要说明的是，TRP与终端设备的距离可以是TRP包括的天线组与终端设备的距离。
可选的，第一下行信号可以是TRS信号。
在上述第二种实现方式中，通信装置通过第一TRP向终端设备发送第一下行信号，包括：基带单元生成基带信号，并将基带信号发送给第一TRP。第一TRP将基带信号转化成频率为f的射频信号，向终端设备发送射频信号。其中，频率f是网络设备20和终端设备协商好的发送频率。
在上述第一种实现方式中，通信装置通过第一TRP向终端设备发送第一下行信号，包括：通信装置的基带单元生成基带信号，并将基带信号发送给通信装置包括的第一TRP。第一TRP将基带信号转化成频率为f的射频信号，向终端设备发送射频信号。
902、终端设备根据所述第一下行信号的接收频率发送第一上行信号。
具体实现中，第一下行信号在传输过程中发生频率偏移，终端设备接收的信号较第一TRP发送第一下行信号的频率发生了偏移，终端设备可以根据偏移后的频率接收到第一下行信号，并锁频在偏移后的频率，还可以根据锁频后的频率发送第一上行信号，即所述终端设备处所述第一上行信号的发送频率为所述终端设备处所述第一下行信号的接收频率。
或者，可选的，终端设备可以在偏移后的频率接收到第一下行信号，可以根据接收频率得到一个新的频率，进而锁频在新的频率上，以新的频率发送第一上行信号。例如，终端设备可以在接收频率的基础上，加一偏移值，得到新的频率。
903、通信装置通过所述第一TRP从所述终端设备接收第一上行信号，所述第一TRP处所述第一上行信号的接收频率为第一接收频率。
具体地，第一上行信号在传输过程中也会发生多普勒效应，第一TRP处第一上行信号的接收频率较第一上行信号的发送频率发生了偏移，即第一TRP与终端设备之间存在上行频偏。
需要说明的是，第一TRP与终端设备之间的上行频偏、第一TRP与终端设备之间的下行频偏可以相同。可选的，第一TRP与终端设备之间的上行频偏、第一TRP与终端设备之间的下行频偏也可以不同。具体地，上行频偏＝k*下行频偏，其中，k是小于等于1的正数。
示例的，第一下行信号的发送频率为f，传输过程中第一下行信号的频率发生偏移，终端设备处第一下行信号的接收频率为f+△f 1。终端设备还可以锁频在f+△f 1，根据f+△f 1发送第一上行信号，传输过程中第一上行信号的频率发生偏移，第一TRP处第一上行信号的接收频率为f+2△f 1。其中，△f 1为终端设备与第一TRP之间的频偏(上行频偏或下行频偏)，△f 1为正值。
904、通信装置通过第二TRP从所述终端设备接收所述第一上行信号，所述第二TRP处所述第一上行信号的接收频率为第二接收频率。
具体实现中，第一上行信号在传输至第二TRP的过程中也会发生多普勒效应，第二TRP处第一上行信号的接收频率较第一上行信号的发送频率也发生了偏移，即第二TRP与终端设备之间也存在上行频偏。
需要说明的是，终端设备与第一TRP之间的上行频偏、终端设备与第二TRP之间的上行频偏一个是正值、一个是负值。二者的绝对值可以相同也可以不同。
示例的，第一下行信号的发送频率为f，第一下行信号在终端设备的接收频率为f+△f 1，的频率接收到第一下行信号。终端设备还可以锁频在f+△f 1，根据f+△f 1发送第一上行信号，第二TRP处第一上行信号的接收频率为f+△f 1-△f 2。其中，-△f 2是终端设备与第二TRP之间的上行频偏或下行频偏，-△f 2为负值。
905、通信装置通过所述第二TRP发送第二下行信号，通过所述第一TRP向所述终端设备发送第三下行信号。
其中，所述第二TRP处所述第二下行信号的发送频率减去所述第一TRP处所述第三下行信号的发送频率的值等于△f/k，所述△f为所述第一接收频率减去所述第二接收频率的值相等，所述k上行中心频率和下行中心频率的比率。具体可以通过第一TRP和第二TRP中的一个或者两个进行预纠偏实现。
需要说明的是，终端设备与第一TRP之间的上行频偏、终端设备与第一TRP之间的下行频偏可以是相同的，终端设备与第二TRP之间的上行频偏、终端设备与第二TRP之间的下行频偏也可以是相同的，因此可以认为第一接收频率与第二接收频率的差值等于所述第二TRP处所述第二下行信号的发送频率减去所述第一TRP处所述第三下行信号的发送频率的值。基于此，可以根据所述第一接收频率和所述第二接收频率的差值调整第一TRP处第三下行信号的发送频率，以及第二TRP处第二下行信号的发送频率，使得终端设备处第三下行信号的接收频率、终端设备处第二下行信号的接收频率均相同，保证终端设备与第一TRP、第二TRP能够正常进行通信。通过单个TRP发送下行信号来纠正频偏，节省导频开销的同时避免终端设备处来自不同TRP的下行信号叠加干扰，保证终端侧精准锁频，从而实现网络侧准确的预纠偏。
示例的，上行频偏＝k*下行频偏，通过第一TRP发送第一下行信号的频率为f，终端设备接收第一下行信号的频率为f+△f 1，发送第一上行信号的频率为f+△f 1。第一TRP接收第一上行信号的频率为f+△f 1+k*△f 1，第二TRP接收第一上行信号的频率为f+△f 1-k*△f 2，第一接收频率与第二接收频率的差值等于k*(△f 1+△f 2)，第一接收频率与第二接收频率的差值可以认为是第一TRP和第二TRP的上行频偏的差值。
其中，△f 1为第一TRP与终端设备之间的下行频偏，-△f 2是第二TRP与终端设备之间的下行频偏，第一TRP和第二TRP的下行频偏的差值为△f 1+△f 2。
可见，当k＝1时，第一TRP和第二TRP的上行频偏的差值、第一TRP和第二TRP的下行频偏的差值是相等的，第一接收频率与第二接收频率的差值既可以表示第一TRP和第二TRP的上行频偏的差值，还可以表示第一TRP和第二TRP的下行频偏的差值。为了实现网络侧的预纠偏，第二下行信号的发送频率和第三下行信号的发送频率的差值，与第一接收频率与第二接收频率的差值相同。
当k≠1时，第一TRP和第二TRP的上行频偏的差值、第一TRP和第二TRP的下行频偏的差值是不相等的，第一接收频率与第二接收频率的差值可以表示第一TRP和第二TRP的上行频偏的差值，第一TRP和第二TRP的下行频偏的差值为：△f/k。其中，△f为第一接收频率与第二接收频率的差值，△f为正值。为了实现网络侧的预纠偏，第二下行信号的发送频率和第三下行信号的发送频率的差值为：△f/k。
具体实现中，通信装置根据第一接收频率、第二接收频率的差值进行预纠偏时，可以对第一TRP的发送频率不作调整，因此，所述第一TRP处所述第三下行信号的发送频率和所述第一TRP处所述第一下行信号的发送频率相等，均是f+△f。
然后，可以根据所述第一接收频率减去所述第二接收频率的值，确定所述第二TRP处所述第二下行信号的发送频率。示例的，所述第一TRP处所述第一下行信号的发送频率和所述第一TRP处所述第三下行信号的发送频率均为f，所述第一接收频率减去所述第二接收频率的值为△f，所述第二TRP处所述第二下行信号的发送频率为f+△f/k。其中，k是预配置的参数，可以是小于等于1的正数。
具体实现中，通信装置可以通过以下两种方式进行预纠偏，包括：
第一种、对第一TRP的发送频率不作调整，通信装置的基带单元向第二TRP发送第一接收频率减去第二接收频率的值，使得第二TRP根据这个值调整发送频率。
示例的，当向所述第二TRP发送△f，所述第二TRP在频率f的基础上调整发送频率，调整后第二TRP处的下行发送频率为f+△f/k。例如，本申请实施例所述的第二下行信号的发送频率为f+△f/k。
具体地，所述第二TRP可以包括RRU和天线组。向RRU发送△f，使得RRU通过天线组在频率f+△f/k发送第二下行信号，以实现通过第二TRP发送第二下行信号。
第二种、对第一TRP的发送频率不作调整，通信装置的基带单元根据第一接收频率减去第二接收频率的值调整基带信号的发送频率，向第一TRP、第二TRP发送的基带信号的发送频率的差值与第一接收频率减去第二接收频率的值相关，第一TRP、第二TRP可以接收基带单元发送的基带信号后只需要将基带信号转化成射频信号，可以不进行频率调整，就可以保证第二TRP的下行发送频率减去第一TRP的下行发送频率的差值，与第一接收频率减去第二接收频率的差值相等。
示例的，基带单元向所述第一TRP发送第三基带信号，所述第三基带信号用于所述第一TRP向所述终端设备发送所述第三下行信号，例如，第一TRP可以将第三基带信号转化成射频信号，即所述第三下行信号，以便向终端设备发送所述第三下行信号。
基带单元向所述第二TRP发送第二基带信号，所述第二基带信号用于所述第二TRP向所述终端设备发送所述第二下行信号；例如，第二TRP可以将第二基带信号转化成射频信号，即所述第二下行信号，以便向终端设备发送所述第二下行信号。
其中，所述第二基带信号的发送频率减去所述第三基带信号的发送频率的值等于△f/k，其中，△f为所述第二接收频率减去所述第一接收频率的值。
可选的，通信装置根据第一接收频率、第二接收频率的差值进行预纠偏时，可以对第一TRP、第二TRP的发送频率进行调整。因此，所述第一TRP处所述第三下行信号的发送频率和所述第一TRP处所述第一下行信号的发送频率不相等。
具体地，通信装置(或通信装置的基带处理单元)可以根据所述第一接收频率减去所述第二接收频率的值，确定所述第二TRP处所述第二下行信号的发送频率和所述第一TRP处所述第三下行信号的发送频率。
示例的，所述第一TRP处所述第一下行信号的发送频率为f，所述第一接收频率与所述第二接收频率的差值为△f 2，所述第三下行信号的发送频率为f+△f 1，所述第二下行信号的发送频率为f+△f 1+△f 2；其中，△f 1为频率调整因子。
可选的，所述通信装置还可以向所述第一TRP发送△f 1，使得第一TRP发送第三下行信号的频率为f+△f 1。所述通信装置还可以向所述第二TRP发送△f 1+△f 2，使得第二TRP发送第二下行信号的频率为f+△f 1+△f 2。
具体的，当通信装置为基带单元，基带单元向第一TRP发送△f 1，向所述第二TRP发送△f 1+△f 2。当通信装置为网络设备，网络设备的基带单元向第一TRP发送△f 1，向所述第二TRP发送△f 1+△f 2。
以下结合具体示例，详细介绍本申请实施例所述的方法。具体地，UE位于相邻两 个抱杆之间，这两个抱杆上部署了两个TRP，这两个TRP接于同一个BBU。将UE靠近的TRP称为服务TRP，另外一个TRP称为协作TRP。参考服务TRP对协作TRP的发送频率进行调整，实现了网络侧的预纠偏。如图10所示，所述方法包括以下步骤：
1001、服务TRP根据频率f发送TRS。
1002、UE根据频率(f+△f 1)接收到TRS，并锁频在(f+△f 1)上。
其中，△f 1是UE与服务TRP之间的下行频偏。
1003、UE根据频率(f+△f 1)发送上行信号。
1004、服务TRP接收UE发送的上行信号，向BBU发送服务TRP的接收频率x＝f+2△f 1。
需要说明的是，假设UE与服务TRP之间的上行频偏、UE与服务TRP之间的下行频偏相等，因此，服务TRP的接收频率比UE的发送频率(f+△f 1)多了△f 1，即服务TRP的接收频率x＝f+2△f 1。其中，服务TRP的接收频率x即本申请实施例所述的第一接收频率。
1005、协作TRP接收UE发送的上行信号，向BBU发送协作TRP的接收频率y＝f+△f 1-△f 2。
需要说明的是，UE与协作TRP之间的上行频偏、UE与服务TRP之间的上行频偏假一个为正值，一个为负值。UE与服务TRP之间的上行频偏为△f 1，因此UE与协作TRP之间的上行频偏可以是-△f 2。因此，协作TRP的接收频率比UE的发送频率(f+△f 1)多了(-△f 2)，即协作TRP的接收频率y＝f+△f 1-△f 2。其中，协作TRP的接收频率y即本申请实施例所述的第二接收频率。
1006、BBU计算服务TRP的接收频率与协作TRP的接收频率的差值，即x-y＝△f1+△f2。
其中，x-y即本申请实施例所述的第一接收频率减去第二接收频率的值。
1007、BBU向协作TRP发送x-y的值。
1008、服务TRP根据频率f发送下行信号，UE处以频率(f+△f1)接收服务TRP发送的下行信号。
需要说明的是，UE的接收频率与UE锁频一致，保证UE和服务TRP的正常通信。
1009、协作TRP根据频率(f+△f1+f2)发送下行信号，UE实际接收信号频率为f+△f1，与UE锁频一致。
需要说明的是，UE的接收频率与UE锁频一致，保证UE和协作TRP的正常通信。
本申请实施例还提供一种信号频率调整方法，适用于图4所示的组网。需要说明的是，图11中第一TRP和第二TRP可以向不同的区域或者方向的终端设备提供通信服务。通信装置可以包括或者不包括第一TRP或者第二TRP，下面结合两种实现方式进行说明：
作为第一种实现方式，通信装置包括第一TRP和第二TRP，此时通信装置可以包括基带单元、射频单元和天线组，第一TRP和第二TRP可以是通信装置中的射频单元和/或者天线，或者可以是通信装置中逻辑实体。
例如，图11中的第一TRP可以是图4中的TRP 5，第二TRP可以是图4中的TRP 6，即第一TRP、第二TRP连接不同的BBU，是不同基站的收发点。图11中的第一 通信装置可以是图4所示组网中的网络设备22，例如通信装置包括BBU 221、TRP 5；第二通信装置可以是图4所示组网中的网络设备23，包括BBU 231和TRP6。也就是说，通信装置包括TRP。
作为第二种实现方式，通信装置不包括第一TRP和第二TRP，此时通信装置可以是基带单元，第一TRP和第二TRP可以是射频单元和/或者天线，第一TRP和第二TRP均与基带单元连接。
例如，图11中的第一TRP可以是图4中的TRP 5，第二TRP可以是图4中的TRP 6，即第一TRP、第二TRP共用同一个BBU，是同一个基站的不同收发点。图11中的第一通信装置可以是图4所示组网中的BBU 221；第二通信装置可以是图4所示组网中的BBU 231。也就是说通信装置不包括TRP。
需要说明的是，图11中的第一TRP可以是图4中的TRP 5，第二TRP可以是图4中的TRP 6，即第一TRP、第二TRP连接不同的BBU，是不同基站的收发点。如图9所示，所述方法包括以下步骤：
1101、第一通信装置通过第一TRP向终端设备发送第一下行信号。
需要说明的是，第一下行信号可以是TRS信号。在图3所示的组网场景下，当终端设备位于相邻两个抱杆之间，终端设备与这两个抱杆上部署的TRP之间均存在频偏。示例的，本申请实施例所述的第一TRP、第二TRP部署在相邻的抱杆上。第一TRP和第二TRP接于不同的基带单元，终端设备位于第一TRP和第二TRP之间时，终端设备与第一TRP和第二TRP之间均存在频偏。第一TRP是距离终端设备更近的TRP，第一TRP还可以称为服务TRP，第二TRP还可以称为协作TRP。需要说明的是，TRP与终端设备的距离可以是TRP包括的天线组与终端设备的距离。
1102、终端设备根据所述第一下行信号的接收频率发送第一上行信号。
具体实现中，第一下行信号在传输过程中发生频率偏移，终端设备接收的信号较第一TRP发送第一下行信号的频率发生了偏移，终端设备可以根据偏移后的频率接收到第一下行信号，并锁频在偏移后的频率，还可以根据锁频后的频率发送第一上行信号，即所述终端设备处所述第一上行信号的发送频率为所述终端设备处所述第一下行信号的接收频率。
1103、第一通信装置通过所述第一TRP从所述终端设备接收第一上行信号，所述第一TRP处所述第一上行信号的接收频率为第一接收频率。
具体实现中，第一上行信号在传输过程中也会发生多普勒效应，第一TRP处第一上行信号的接收频率较第一上行信号的发送频率发生了偏移，即第一TRP与终端设备之间存在上行频偏。
需要说明的是，第一TRP与终端设备之间的上行频偏、第一TRP与终端设备之间的下行频偏可以相同。可选的，第一TRP与终端设备之间的上行频偏、第一TRP与终端设备之间的下行频偏也可以不同。具体地，上行频偏＝k*下行频偏，其中，k是小于等于1的正数。
示例的，第一下行信号的发送频率为f，传输过程中第一下行信号的频率发生偏移，终端设备处第一下行信号的接收频率为f+△f 1。终端设备还可以锁频在f+△f 1，根据 f+△f 1发送第一上行信号，传输过程中第一上行信号的频率发生偏移，第一TRP处第一上行信号的接收频率为f+2△f 1。其中，△f 1为终端设备与第一TRP之间的频偏(上行频偏或下行频偏)，△f 1为正值。
1104、第二通信装置通过所述第二TRP从所述终端设备接收第一上行信号，所述第二TRP处所述第一上行信号的接收频率为第二接收频率。
具体实现中，第一上行信号在传输至第二TRP的过程中也会发生多普勒效应，第二TRP处第一上行信号的接收频率较第一上行信号的发送频率也发生了偏移，即第二TRP与终端设备之间也存在上行频偏。
需要说明的是，终端设备与第一TRP之间的上行频偏、终端设备与第二TRP之间的上行频偏一个是正值、一个是负值。二者的绝对值可以相同也可以不同。
示例的，第一下行信号的发送频率为f，第一下行信号在终端设备的接收频率为f+△f 1，的频率接收到第一下行信号。终端设备还可以锁频在f+△f 1，根据f+△f 1发送第一上行信号，第二TRP处第一上行信号的接收频率为f+△f 1-△f 2。其中，-△f 2是终端设备与第二TRP之间的上行频偏或下行频偏，-△f 2为负值。
1105、第二通信装置从第一通信装置接收所述第一接收频率。
具体实现中，第二通信装置从第一通信装置接收第一接收频率后，可以计算获得第一接收频率减去第二接收频率的值，从而可以根据这个值进行预纠偏，调整第二TRP发送下行信号的频率。
1105仅仅是一种实现方式，第一TRP处不进行预纠偏，第一TRP仍然以1101处的发送频率发送第三下行信号，在第二TRP处根据第二接收频率和第三接收频率的差值进行预纠偏。在另一种实现方式中，第一通信装置先向第二通信装置发送第一接收频率，然后第二通信装置可以将第二接收频率(或者第二接收频率和第一接收频率的差值)发送给第一通信装置，使得第一TRP处和第二TRP处都根据第二接收频率和第三接收频率的差值进行预纠偏。或者，在另一种实现方式中，第二通信装置先将第二接收频率发送给第一通信装置，然后第一通信装置根据第二接收频率和第一接收频率的差值进行预纠偏。或者，在另一种实现方式中，第二通信装置先向第一通信装置发送第二接收频率，然后第一通信装置可以将第一接收频率(或者第二接收频率和第一接收频率的差值)发送给第二通信装置，使得第一TRP处和第二TRP处都根据第二接收频率和第三接收频率的差值进行预纠偏。
1106、第二通信装置通过所述第二TRP发送第二下行信号。
1107、第一通信装置通过所述第一TRP向所述终端设备发送第三下行信号。
其中，所述第二TRP处所述第二下行信号的发送频率减去所述第一TRP处所述第三下行信号的发送频率的值等于△f/k，所述△f为所述第一接收频率减去所述第二接收频率的值相等，所述k上行中心频率和下行中心频率的比率。
第一TRP所述第二TRP处所述第二下行信号的发送频率减去所述第一TRP处所述第三下行信号的发送频率的值等于△f/k，可以通过第一TRP和第二TRP中的一个或者两个进行预纠偏实现，具体可以参考1105的相关内容。
需要说明的是，终端设备与第一TRP之间的上行频偏、终端设备与第一TRP之间的下行频偏可以是相同的，终端设备与第二TRP之间的上行频偏、终端设备与第二 TRP之间的下行频偏也可以是相同的，因此可以认为第一接收频率与第二接收频率的差值等于所述第二TRP处所述第二下行信号的发送频率减去所述第一TRP处所述第三下行信号的发送频率的值。基于此，可以根据所述第一接收频率和所述第二接收频率的差值调整第一TRP处第三下行信号的发送频率，以及第二TRP处第二下行信号的发送频率，使得终端设备处第三下行信号的接收频率、终端设备处第二下行信号的接收频率均相同，保证终端设备与第一TRP、第二TRP能够正常进行通信。通过单个TRP发送下行信号来纠正频偏，节省导频开销的同时避免终端设备处来自不同TRP的下行信号叠加干扰，保证终端侧精准锁频，从而实现网络侧准确的预纠偏。
示例的，上行频偏＝k*下行频偏，通过第一TRP发送第一下行信号的频率为f，终端设备接收第一下行信号的频率为f+△f 1，发送第一上行信号的频率为f+△f 1。第一TRP接收第一上行信号的频率为f+△f 1+k*△f 1，第二TRP接收第一上行信号的频率为f+△f 1-k*△f 2，第一接收频率与第二接收频率的差值等于k*(△f 1+△f 2)，第一接收频率与第二接收频率的差值可以认为是第一TRP和第二TRP的上行频偏的差值。
其中，△f 1为第一TRP与终端设备之间的下行频偏，-△f 2是第二TRP与终端设备之间的下行频偏，第一TRP和第二TRP的下行频偏的差值为△f 1+△f 2。
可见，当k＝1时，第一TRP和第二TRP的上行频偏的差值、第一TRP和第二TRP的下行频偏的差值是相等的，第一接收频率与第二接收频率的差值既可以表示第一TRP和第二TRP的上行频偏的差值，还可以表示第一TRP和第二TRP的下行频偏的差值。为了实现网络侧的预纠偏，第二下行信号的发送频率和第三下行信号的发送频率的差值，与第一接收频率与第二接收频率的差值相同。
当k≠1时，第一TRP和第二TRP的上行频偏的差值、第一TRP和第二TRP的下行频偏的差值是不相等的，第一接收频率与第二接收频率的差值可以表示第一TRP和第二TRP的上行频偏的差值，第一TRP和第二TRP的下行频偏的差值为：△f/k。其中，△f为第一接收频率与第二接收频率的差值，△f为正值。为了实现网络侧的预纠偏，第二下行信号的发送频率和第三下行信号的发送频率的差值为：△f/k。
具体实现中，根据第一接收频率、第二接收频率的差值进行预纠偏时，可以对第一TRP的发送频率不作调整，因此，所述第一TRP处所述第三下行信号的发送频率和所述第一TRP处所述第一下行信号的发送频率相等，可以是f+△f。
然后，可以根据所述第一接收频率减去所述第二接收频率的值，确定所述第二TRP处所述第二下行信号的发送频率。示例的，所述第一TRP处所述第一下行信号的发送频率和所述第一TRP处所述第三下行信号的发送频率均为f，所述第一接收频率减去所述第二接收频率的值为△f，所述第二TRP处所述第二下行信号的发送频率为f+△f/k。其中，k是预配置的参数，可以是小于等于1的正数。
具体实现中，可以通过以下两种方式进行预纠偏，包括：
第一种、对第一TRP的发送频率不作调整，第二通信装置的第二基带单元向第二TRP发送第一接收频率减去第二接收频率的值，使得第二TRP根据这个值调整发送频率。
示例的，当向所述第二TRP发送△f，所述第二TRP在频率f的基础上调整发送频率，调整后第二TRP处的下行发送频率为f+△f/k。例如，本申请实施例所述的第二下 行信号的发送频率为f+△f/k。
具体地，所述第二TRP可以包括RRU和天线组。向RRU发送△f，使得RRU通过天线组在频率f+△f/k发送第二下行信号，以实现通过第二TRP发送第二下行信号。
第二种、对第一TRP的发送频率不作调整，第二通信装置的第二基带单元根据第一接收频率减去第二接收频率的值调整基带信号的发送频率，使得第一通信装置的第一基带单元向第一TRP发送的基带信号的发送频率、第二通信装置向第二TRP发送的基带信号的发送频率二者的差值，与第一接收频率减去第二接收频率的值相关，第一TRP、第二TRP从各自连接的基带单元接收基带信号后只需要将基带信号转化成射频信号，可以不进行频率调整，就可以保证第二TRP的下行发送频率减去第一TRP的下行发送频率的差值，与第一接收频率减去第二接收频率的差值相等。
示例的，第一基带单元向所述第一TRP发送第三基带信号，所述第三基带信号用于所述第一TRP向所述终端设备发送所述第三下行信号，例如，第一TRP可以将第三基带信号转化成射频信号，即所述第三下行信号，以便向终端设备发送所述第三下行信号。
第二基带单元向所述第二TRP发送第二基带信号，所述第二基带信号用于所述第二TRP向所述终端设备发送所述第二下行信号；例如，第二TRP可以将第二基带信号转化成射频信号，即所述第二下行信号，以便向终端设备发送所述第二下行信号。
其中，所述第二基带信号的发送频率减去所述第三基带信号的发送频率的值等于△f/k，其中，△f为所述第二接收频率减去所述第一接收频率的值。
在采用对应各个功能划分各个功能模块的情况下，图12示出上述实施例中所涉及的通信装置的一种可能的结构示意图。图12所示的通信装置可以是本申请实施例所述的通信装置，也可以是通信装置中实现上述方法的部件。如图12所示，通信装置包括处理单元1201以及通信单元1202。处理单元可以是一个或多个处理器，通信单元可以是收发器。
处理单元1201，用于支持通信装置执行内部处理，例如，计算第一接收频率和第二接收频率的差值，和/或用于本文所描述的技术的其它过程。
通信单元1202，用于支持该通信装置与其他通信装置之间的通信，例如，支持通信装置执行步骤703、步骤704，和/或用于本文所描述的技术的其它过程。
需要说明的是，上述方法实施例涉及的各步骤的所有相关内容均可以援引到对应功能模块的功能描述，在此不再赘述。
一种可能的实现方式中，图12所示的通信装置也可以是应用于通信装置中的芯片。所述芯片可以是片上系统(System-On-a-Chip，SOC)或者是具备通信功能的基带芯片等。
其中，以上用于接收/发送的通信单元1202可以是该装置的一种接口电路，用于读入基带信号。例如，当该装置以芯片的方式实现时，该通信单元1202是该芯片用于读入基带信号的接口电路，或，通信单元1202是该芯片用于输出基带信号的接口电路。
示例性的，在采用集成的单元的情况下，本申请实施例提供的通信装置的结构示意图如图13所示。在图13中，该通信装置包括：处理模块1301和通信模块1302。处理模块1301用于对通信装置的动作进行控制管理，例如，执行上述处理单元1201 执行的步骤，和/或用于执行本文所描述的技术的其它过程。通信模块1302用于执行上述通信单元1202执行的步骤，支持通信装置与其他设备之间的交互，如与其他终端装置之间的交互。如图13所示，通信装置还可以包括存储模块1303，存储模块1303用于存储通信装置的程序代码和数据。
当处理模块1301为处理器，通信模块1302为收发器，存储模块1303为存储器时，通信装置为图8所示的通信装置。
本申请实施例提供一种计算机可读存储介质，计算机可读存储介质中存储有指令；指令用于执行如图9～图11所示的方法。
本申请实施例提供一种包括指令的计算机程序产品，当其在通信装置上运行时，使得通信装置实现如图9～图11所示的方法。
本申请实施例一种无线通信装置，包括：无线通信装置中存储有指令；当无线通信装置在图8、图12、图13所示的通信装置上运行时，使得通信装置实现如图9～图11所示的方法。该无线通信装置可以为芯片等。
通过以上的实施方式的描述，所属领域的技术人员可以清楚地了解到，为描述的方便和简洁，仅以上述各功能模块的划分进行举例说明，实际应用中，可以根据需要而将上述功能分配由不同的功能模块完成，即将数据库访问装置的内部结构划分成不同的功能模块，以完成以上描述的全部或者部分功能。
在本申请所提供的几个实施例中，应该理解到，所揭露的数据库访问装置和方法，可以通过其它的方式实现。例如，以上所描述的数据库访问装置实施例仅仅是示意性的，例如，所述模块或单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个装置，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，数据库访问装置或单元的间接耦合或通信连接，可以是电性，机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是一个物理单元或多个物理单元，即可以位于一个地方，或者也可以分布到多个不同地方。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
另外，在本申请各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。上述集成的单元既可以采用硬件的形式实现，也可以采用软件功能单元的形式实现。
所述集成的单元如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个可读取存储介质中。基于这样的理解，本申请实施例的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的全部或部分可以以软件产品的形式体现出来，该软件产品存储在一个存储介质中，包括若干指令用以使得一个设备(可以是单片机，芯片等)或处理器执行本申请各个实施例所述方法的全部或部分步骤。而前述的存储介质包括：U盘、移动硬盘、ROM、RAM、磁盘或者光盘等各种可以存储程序代码的介质。
以上所述，仅为本申请的具体实施方式，但本申请的保护范围并不局限于此，任 何在本申请揭露的技术范围内的变化或替换，都应涵盖在本申请的保护范围之内。因此，本申请的保护范围应以所述权利要求的保护范围为准。

Claims (14)

  1. 一种信号频率调整方法，其特征在于，所述方法包括：
    通信装置通过第一发送接收节点TRP向终端设备发送第一下行信号；
    所述通信装置通过所述第一TRP从所述终端设备接收上行信号，所述第一TRP处所述上行信号的接收频率为第一接收频率，所述终端设备处所述上行信号的发送频率是根据所述终端设备处所述第一下行信号的接收频率确定的；
    所述通信装置通过第二TRP从所述终端设备接收所述上行信号，所述第二TRP处所述上行信号的接收频率为第二接收频率；
    所述通信装置通过所述第二TRP向所述终端设备发送第二下行信号；
    所述通信装置通过所述第一TRP向所述终端设备发送第三下行信号；
    其中，所述第二TRP处所述第二下行信号的发送频率减去所述第一TRP处所述第三下行信号的发送频率的值等于△f/k，所述△f为所述第一接收频率减去所述第二接收频率的值相等，所述k上行中心频率和下行中心频率的比率。
  2. 根据权利要求1所述的方法，其特征在于，所述第一TRP处所述第三下行信号的发送频率和所述第一TRP处所述第一下行信号的发送频率相等。
  3. 根据权利要求2所述的方法，其特征在于，所述方法还包括：
    根据所述第一接收频率减去所述第二接收频率的值，确定所述第二TRP处所述第二下行信号的发送频率。
  4. 根据权利要求2或3所述的方法，其特征在于，所述第一TRP处所述第一下行信号的发送频率和所述第一TRP处所述第三下行信号的发送频率均为f，所述第二TRP处所述第二下行信号的发送频率为f+△f/k。
  5. 根据权利要求4所述的方法，其特征在于，所述方法包括：
    向所述第二TRP发送△f/k，以使得所述第二TRP处所述第三下行信号的发送频率为f+△f/k。
  6. 根据权利要求1-4任一项所述的方法，其特征在于，所述通信装置通过所述第一TRP向所述终端设备发送所述第三下行信号，包括：所述通信装置向所述第一TRP发送第三基带信号，所述第三基带信号用于所述第一TRP向所述终端设备发送所述第三下行信号；
    所述通信装置通过所述第二TRP向所述终端设备发送所述第二下行信号，包括：
    所述通信装置向所述第二TRP发送第二基带信号，所述第二基带信号用于所述第二TRP向所述终端设备发送所述第二下行信号；
    其中，所述第二基带信号的发送频率减去所述第三基带信号的发送频率的值等于△f/k。
  7. 一种通信装置，其特征在于，包括：
    处理单元，用于通过第一发送接收节点TRP向终端设备发送第一下行信号；
    所述处理单元还用于，通过所述第一TRP从所述终端设备接收上行信号，所述第一TRP处所述上行信号的接收频率为第一接收频率，通过第二TRP从所述终端设备接收所述上行信号，所述第二TRP处所述上行信号的接收频率为第二接收频率；所述终端设备处所述上行信号的发送频率是根据所述终端设备处所述第一下行信号的接收 频率确定的；
    所述处理单元还用于，通过所述第二TRP向所述终端设备发送第二下行信号；通过所述第一TRP向所述终端设备发送第三下行信号；其中，所述第二TRP处所述第二下行信号的发送频率减去所述第一TRP处所述第三下行信号的发送频率的值等于△f/k，所述△f为所述第一接收频率减去所述第二接收频率的值相等，所述k上行中心频率和下行中心频率的比率。
  8. 根据权利要求7所述的通信装置，其特征在于，所述第一TRP处所述第三下行信号的发送频率和所述第一TRP处所述第一下行信号的发送频率相等。
  9. 根据权利要求8所述的通信装置，其特征在于，所述处理单元还用于，根据所述第一接收频率减去所述第二接收频率的值，确定所述第二TRP处所述第二下行信号的发送频率。
  10. 根据权利要求8或9所述的通信装置，其特征在于，所述第一TRP处所述第一下行信号的发送频率和所述第一TRP处所述第三下行信号的发送频率均为f，所述第二TRP处所述第二下行信号的发送频率为f+△f/k。
  11. 根据权利要求10所述的通信装置，其特征在于，还包括通信单元，所述通信单元用于，向所述第二TRP发送△f/k，以使得所述第二TRP处所述第三下行信号的发送频率为f+△f/k。
  12. 根据权利要求7-11任一项所述的通信装置，其特征在于，还包括通信单元，
    所述通信单元具体用于，向所述第一TRP发送第三基带信号，所述第三基带信号用于所述第一TRP向所述终端设备发送所述第三下行信号；向所述第二TRP发送第二基带信号，所述第二基带信号用于所述第二TRP向所述终端设备发送所述第二下行信号；
    其中，所述第二基带信号的发送频率减去所述第三基带信号的发送频率的值等于△f/k。
  13. 一种通信装置，其特征在于，包括至少一个处理器和存储器，所述至少一个处理器与所述存储器耦合；
    所述存储器，用于存储计算机程序；
    所述至少一个处理器，用于执行所述存储器中存储的计算机程序，以使得所述装置执行如权利要求1至6中任一项所述的方法。
  14. 一种计算机可读存储介质，其特征在于，所述计算机可读存储介质存储有计算机程序或指令，当所述计算机程序或指令被运行时，实现如权利要求1至6中任一项所述的方法。
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024092692A1 (en) * 2022-11-04 2024-05-10 Qualcomm Incorporated Doppler offset reporting for coherent joint-transmission

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010072111A1 (zh) * 2008-12-26 2010-07-01 中兴通讯股份有限公司 移动终端调整频偏的方法和装置
CN103516637A (zh) * 2012-06-19 2014-01-15 普天信息技术研究院有限公司 高速铁路系统中的下行链路通信方法和装置
CN105337693A (zh) * 2014-08-14 2016-02-17 中国移动通信集团公司 下行信号预纠偏及纠偏方法、装置、系统和相关设备
CN106034093A (zh) * 2015-03-19 2016-10-19 中兴通讯股份有限公司 一种下行链路数据发射方法、装置及基站
CN107517175A (zh) * 2016-06-15 2017-12-26 普天信息技术有限公司 上行频偏纠正方法和装置

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040248519A1 (en) * 2003-05-19 2004-12-09 Kari Niemela Data transmission method, system and network element
CN102006116A (zh) * 2009-09-03 2011-04-06 中兴通讯股份有限公司 频偏预补偿的方法与装置
CN105812301B (zh) * 2014-12-27 2019-02-26 华为技术有限公司 通信方法、设备及系统
US10637709B2 (en) * 2017-01-16 2020-04-28 Qualcomm Incorporated Signaling methods for frequency offset estimation using reference signals

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010072111A1 (zh) * 2008-12-26 2010-07-01 中兴通讯股份有限公司 移动终端调整频偏的方法和装置
CN103516637A (zh) * 2012-06-19 2014-01-15 普天信息技术研究院有限公司 高速铁路系统中的下行链路通信方法和装置
CN105337693A (zh) * 2014-08-14 2016-02-17 中国移动通信集团公司 下行信号预纠偏及纠偏方法、装置、系统和相关设备
CN106034093A (zh) * 2015-03-19 2016-10-19 中兴通讯股份有限公司 一种下行链路数据发射方法、装置及基站
CN107517175A (zh) * 2016-06-15 2017-12-26 普天信息技术有限公司 上行频偏纠正方法和装置

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP4060916A4 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024092692A1 (en) * 2022-11-04 2024-05-10 Qualcomm Incorporated Doppler offset reporting for coherent joint-transmission

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