CN111756472B

CN111756472B - Uplink communication method and communication device

Info

Publication number: CN111756472B
Application number: CN201910245790.2A
Authority: CN
Inventors: 陈拓
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2019-03-28
Filing date: 2019-03-28
Publication date: 2022-03-29
Anticipated expiration: 2039-03-28
Also published as: WO2020192657A1; CN111756472A

Abstract

The embodiment of the application discloses an uplink communication method and a communication device, relates to the field of communication, and can avoid time offset of uplink signals sent to a decoupling cell by a terminal device and ensure the performance of uplink transmission. The method comprises the following steps: determining a first uplink timing advance between the terminal equipment and the first network equipment; the first network equipment provides service for a service cell where the terminal equipment is located; or, the first network device provides service for the decoupling cell where the terminal device is located; and sending the first uplink timing advance to the terminal equipment, and indicating the terminal equipment to adjust the sending time sequence of an uplink signal according to the first uplink timing advance.

Description

Uplink communication method and communication device

Technical Field

The embodiment of the application relates to the field of communication, and in particular relates to an uplink communication method and a communication device.

Background

5G(5^thgeneration, fifth generation)) communication systems support an uplink and downlink decoupling technology, that is, when a terminal device is allowed to access a serving cell, the terminal device can also access a decoupling cell to perform uplink transmission.

The 5G communication standard only supports the terminal device to maintain one TA (i.e., the terminal device and the service), that is, when the terminal device transmits an uplink signal on the serving cell and the decoupling cell, the terminal device can only adjust the uplink transmission timing by using the TA of the serving cell. When the terminal is accessed to the serving cell a and the decoupling cell B, if the channel conditions between the cell a, the cell B and the terminal device are different, the terminal singly adopts the TA of the serving cell, which may cause the uplink signal sent by the terminal device to the decoupling cell to have time offset, affecting the uplink transmission performance.

Disclosure of Invention

The embodiment of the application provides an uplink communication method and a communication device, which can avoid time offset of an uplink signal sent to a decoupling cell by a terminal device and ensure the performance of uplink transmission.

In order to achieve the above purpose, the embodiment of the present application adopts the following technical solutions:

in a first aspect, an uplink communication method is disclosed, including: a serving cell determines a first uplink timing advance between a terminal device and a first network device; the first network equipment provides service for a service cell where the terminal equipment is located; or, the first network device provides service for the decoupling cell where the terminal device is located. Further, the serving cell may also send a first uplink timing advance to the terminal device, and instruct the terminal device to adjust a transmission timing of the uplink signal according to the first uplink timing advance.

In the method provided by the embodiment of the invention, the serving cell can flexibly switch the uplink timing advance of the terminal equipment. When the terminal equipment needs to send an uplink signal to the serving cell, the serving cell calculates the uplink timing advance of the serving cell and sends the uplink timing advance of the serving cell to the terminal equipment, so that the serving cell can receive the uplink signal sent by the terminal equipment without deviation. When the terminal equipment needs to send an uplink signal to the decoupling cell, the serving cell calculates the uplink timing advance of the decoupling cell and sends the uplink timing advance of the decoupling cell to the terminal equipment, so that the decoupling cell can receive the uplink signal sent by the terminal equipment without deviation, time offset of the uplink signal sent by the terminal equipment to the decoupling cell is avoided, and uplink transmission performance is guaranteed. In addition, the serving cell always calculates the uplink timing advance for maintaining the terminal equipment, and the terminal equipment only takes effect for one uplink timing advance without violating the single TA regulation in the existing standard. The method provided by the embodiment of the invention can reduce the influence of the time offset of the signals among the cells on the signal transmission performance as much as possible on the basis of the existing protocol.

With reference to the first aspect, in a first possible implementation possibility of the first aspect, the determining a first uplink timing advance between the terminal device and the first network device specifically includes: acquiring uplink transmission time delay between first network equipment and terminal equipment; and calculating the first uplink timing advance according to the uplink transmission delay between the terminal equipment and the first network equipment.

In the embodiment of the present invention, the serving cell may calculate the first uplink timing advance according to the uplink transmission delay corresponding to the first network device, and then the terminal device adjusts the uplink transmission timing according to the first uplink timing advance, so that the first network device may receive the uplink signal sent by the terminal device without loss.

With reference to the first possible implementation manner of the first aspect, in a second possible implementation manner of the first aspect, the obtaining an uplink transmission delay between a first network device and a terminal device includes: receiving uplink transmission delay sent by first network equipment; or, measuring an uplink signal sent by the terminal device to obtain an uplink transmission delay.

In the embodiment of the invention, if the first network equipment is the network equipment of the decoupling cell, the serving cell can receive the uplink transmission delay sent by the first network equipment; if the first network device is a network device of the serving cell, the serving cell may measure uplink transmission information sent by the terminal device to determine the uplink transmission delay of the first network device.

With reference to the first aspect or the first or second possible implementation manner of the first aspect, in a third possible implementation manner of the first aspect, before determining the first uplink timing advance between the terminal device and the first network device, the method further includes: and determining the frequency point of the uplink signal sent by the terminal equipment as the frequency point of the first network equipment.

In the embodiment of the invention, the serving cell can determine which frequency point the terminal device is to send the uplink signal on according to the uplink service requirement of the terminal device, and further determine whether the first network device is the network device of the serving cell or the network device of the decoupling cell according to the determined frequency point, and flexibly switch the uplink timing advance of the terminal device according to the service requirement of the terminal device, so that the uplink signal of the terminal device can be received by the serving cell or the decoupling cell without damage, and the transmission performance of the communication system is ensured.

With reference to the first aspect or any one of the first to third possible implementation manners of the first aspect, in a fourth possible implementation manner of the first aspect, if the first network device provides a service for a decoupling cell where the terminal device is located, the method further includes: a serving cell receives an uplink signal sent by terminal equipment; the timing advance of the uplink signal sent by the terminal equipment is a first uplink timing advance; compensating the received uplink signal according to the difference value of the first uplink transmission time delay and the second uplink transmission time delay; the first uplink transmission delay is the uplink transmission delay between the terminal device and the serving cell, and the second uplink transmission delay is the uplink transmission delay between the terminal device and the decoupling cell.

In the embodiment of the present invention, if the first network device provides service for the decoupling cell where the terminal device is located, that is, the terminal device may adjust the uplink transmission timing according to the uplink timing advance of the decoupling cell, the decoupling cell may receive the uplink signal sent by the terminal device without loss, and the uplink signal received by the serving cell is lost. In the embodiment of the invention, the serving cell can compensate the received uplink signal, and the loss of the transmission performance is reduced as much as possible.

With reference to the fourth possible implementation manner of the first aspect, in a fifth possible implementation manner of the first aspect, the performing compensation processing on the received uplink signal according to a difference between the first uplink transmission delay and the second uplink transmission delay includes:

converting the time domain signal Y (n) into a frequency domain signal Y (k); wherein N is 0,1, … N-1, k is 0,1, … P-1; wherein, the time domain signal y (N) is a received uplink signal, N is a sample point number included after the time domain signal y (N) is converted into a discrete digital signal, and P is a sample point number included in the frequency domain signal y (k); performing compensation processing on y (k) to obtain z (k) ═ y (k) × W^Mk(ii) a Wherein the content of the first and second substances,

m is the number of sample points of the time domain signal y (n) corresponding to the duration | T1-T2|, T1 is the first uplink transmission delay, and T2 is the second uplink transmission delay.

In a second aspect, a communications apparatus is disclosed, comprising:

the processing unit is used for determining a first uplink timing advance between the terminal equipment and the first network equipment; the first network equipment provides service for a service cell where the terminal equipment is located; or, the first network device provides service for the decoupling cell where the terminal device is located; and the communication unit is used for sending the first uplink timing advance to the terminal equipment and instructing the terminal equipment to adjust the sending time sequence of the uplink signal according to the first uplink timing advance.

With reference to the second aspect, in a first possible implementation manner of the second aspect, the processing unit is specifically configured to obtain an uplink transmission delay between the first network device and the terminal device; and calculating the first uplink timing advance according to the uplink transmission delay between the terminal equipment and the first network equipment.

With reference to the first possible implementation manner of the second aspect, in a second possible implementation manner of the second aspect, the communication unit is further configured to receive an uplink transmission delay sent by the first network device; or, the processing unit is further configured to measure an uplink signal sent by the terminal device to obtain the uplink transmission delay.

With reference to the second aspect or the first or second possible implementation manner of the second aspect, in a third possible implementation manner of the second aspect, before the processing unit determines the first uplink timing advance between the terminal device and the first network device, it determines that the frequency point at which the terminal device sends the uplink signal is the frequency point of the first network device.

With reference to the second aspect or any one of the first to third possible implementation manners of the second aspect, in a fourth possible implementation manner of the second aspect, if the first network device provides service for a decoupling cell where the terminal device is located, the communication unit is further configured to receive an uplink signal sent by the terminal device; the timing advance of the uplink signal sent by the terminal equipment is a first uplink timing advance; the processing unit is further configured to perform compensation processing on the received uplink signal according to a difference between the first uplink transmission delay and the second uplink transmission delay; the first uplink transmission delay is the uplink transmission delay between the terminal device and the serving cell, and the second uplink transmission delay is the uplink transmission delay between the terminal device and the decoupling cell.

With reference to any one of the fourth possible implementation manners of the second aspect, in a fifth possible implementation manner of the second aspect, the processing unit is specifically configured to convert the time-domain signal y (n) into a frequency-domain signal y (k); wherein N is 0,1, … N-1, k is 0,1, … P-1; wherein, the time domain signal y (N) is a received uplink signal, N is a sample point number included after the time domain signal y (N) is converted into a discrete digital signal, and P is a sample point number included in the frequency domain signal y (k);

performing compensation processing on y (k) to obtain z (k) ═ y (k) × W^Mk(ii) a Wherein the content of the first and second substances,

In a third aspect, a communication apparatus is disclosed, which includes at least one processor and a memory, where the at least one processor is coupled with the memory, and the at least one processor is configured to implement the uplink communication method according to any one of the implementation manners of the first aspect and the first aspect.

In a fourth aspect, a computer-readable storage medium is disclosed, comprising: the computer readable storage medium has instructions stored therein; when the computer readable storage medium runs on the communication apparatus according to any one of the second aspect and the second aspect, the communication apparatus is caused to perform the uplink communication method according to any one of the first aspect and the first aspect.

In a fifth aspect, a wireless communications apparatus is disclosed that includes: instructions are stored in the wireless communication device; when the wireless communication device operates on the communication device according to any one of the second aspect and the second aspect, the wireless communication device is a chip, and the communication device is caused to perform the uplink communication method according to any one of the first aspect and the first aspect.

Drawings

Fig. 1 is an architecture diagram of a communication system provided in an embodiment of the present application;

fig. 2 is a schematic diagram of signal reception provided by an embodiment of the present application;

fig. 3 is a block diagram of a communication device according to an embodiment of the present disclosure;

fig. 4 is a flowchart illustrating an uplink communication method according to an embodiment of the present application;

fig. 5 is another schematic flowchart of an uplink communication method according to an embodiment of the present application;

fig. 6 is a schematic diagram of signal reception provided by an embodiment of the present application;

fig. 7 is another schematic flowchart of an uplink communication method according to an embodiment of the present application;

fig. 8 is a schematic diagram of a signal receiving method according to an embodiment of the present application;

fig. 9 is a schematic flowchart of a receiving time adjustment method according to an embodiment of the present application;

fig. 10 is a schematic diagram of signal reception provided by an embodiment of the present application;

fig. 11 is another block diagram of a communication device according to an embodiment of the present disclosure;

fig. 12 is another block diagram of a communication device according to an embodiment of the present application.

Detailed Description

The technical solution in the present application will be described below with reference to the accompanying drawings.

Fig. 1 shows a schematic diagram of a communication system to which the technical solution provided by the present application is applicable, and the communication system may include a plurality of network devices 100, 200 and one or more terminal devices 300. Fig. 1 is a schematic diagram, and does not limit the application scenarios of the technical solutions provided in the present application.

The network device 100 may be a transmission reception node (TRP), a base station, a relay station, an access point, or the like. The network device 100 may be a network device in a 5G communication system or a network device in a future evolution network; but also wearable devices or vehicle-mounted devices, etc. In addition, the method can also comprise the following steps: a Base Transceiver Station (BTS) in a global system for mobile communication (GSM) or Code Division Multiple Access (CDMA) network, or an nb (nodeb) in Wideband Code Division Multiple Access (WCDMA), or an eNB or enodeb (evolved nodeb) in Long Term Evolution (LTE). The network device 100 may also be a wireless controller in a Cloud Radio Access Network (CRAN) scenario. The present application will be described below with reference to a base station as an example.

The terminal equipment 300 may be User Equipment (UE), access terminal equipment, UE unit, UE station, mobile station, remote terminal equipment, mobile device, UE terminal equipment, wireless communication device, UE agent, or UE device, etc. The access terminal device may be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device with wireless communication capability, a computing device or other processing device connected to a wireless modem, a vehicle-mounted device, a wearable device, a terminal device in a 5G network or a terminal device in a future evolved Public Land Mobile Network (PLMN) network, etc.

In the communication system shown in fig. 1, the coverage cell of the network device 100 is a serving cell a of the terminal device 200, and the coverage cell of the network device 200 is a decoupling cell B of the terminal device 300. The communication system shown in fig. 1 supports an uplink decoupling technology, that is, after the terminal device 300 accesses the serving cell a, the terminal device 300 may communicate with the core network at a frequency point of the network device 100, for example, the network device 100 sends a control signaling, switching between cells, downlink data transmission, and the like to the terminal device 300.

In addition, the terminal device 300 is allowed to access the decoupling cell B at the same time, but only the decoupling cell B is allowed to receive the uplink signal sent by the terminal device 300, that is, the terminal device can only send the uplink signal at the frequency point of the network device 200, and cannot communicate with the core network side.

In addition, the conventional standard specifies that when the terminal apparatus 300 transmits an uplink signal in the serving cell a and the decoupling cell B, the terminal apparatus can adjust the uplink transmission timing only by using one TA (hereinafter, referred to as "single TA specification"), for example, the terminal apparatus can adjust the uplink transmission timing by using the TA of the serving cell. Specifically, the terminal device 300 accesses the serving cell a, and the network device 100 calculates the TA1 according to the uplink transmission delay T1 between the terminal device 300 and the network device 100. Network device 100 may also send TA1 to the terminal device, and terminal device 300 may adjust the uplink transmission timing according to TA 1. When terminal 300 accesses decoupling cell B, terminal 300 also adjusts the uplink transmission timing according to TA 1.

Referring to fig. 2, terminal device 300 adjusts the uplink transmission timing according to TA1 and then transmits the uplink signal, and both network device 100 and network device 200 may receive the uplink signal transmitted by terminal device 300. Here, the network device 100 may receive the uplink signal transmitted by the terminal device 300 without bias. Since the uplink transmission delay T2< T1 between the network device 200 and the terminal device 300, the time when the uplink signal transmitted by the terminal device 300 reaches the network device 200 is earlier than the time when the uplink signal transmitted by the terminal device 300 reaches the network device 100. Since the terminal device 300 adjusts the uplink transmission timing at TA1, when the network device 200 receives the uplink signal transmitted by the terminal device 300, the signal of the time length (T1-T2) is lost. That is, the uplink signal received by the network device 200 is time-shifted, which affects the performance of uplink transmission and causes performance loss.

It should be noted that the uplink transmission delay is a time interval between a time when the terminal device sends the uplink signal and a time when the network device receives the uplink signal. The terminal equipment can adjust the uplink sending time sequence according to the TA, determine the starting time of uplink transmission and start sending the uplink signal at the starting time. Generally, the smaller the uplink transmission delay between the terminal device and the network device is, the smaller the TA determined according to the uplink transmission delay is. Similarly, the larger the uplink transmission delay between the terminal device and the network device is, the larger the TA determined according to the uplink transmission delay is. TA is a key factor affecting the reception quality of an uplink signal. For example, referring to fig. 2, terminal device 300 determines that the starting time of uplink transmission is time a according to TA1, network device 100 starts receiving the uplink signal at time a, and network device 200 also starts receiving the uplink signal at time a. Since the uplink transmission delay T2< T1 between the network device 200 and the terminal device 300, the time when the uplink signal sent by the terminal device 300 reaches the network device 200 is earlier than the time when the uplink signal reaches the network device by | T1-T2|, and the network device 200 starts receiving the uplink signal at the time a, and the signal with the duration of (T1-T2) is lost.

It can be seen that, in the prior art, only the terminal device is supported to adopt the TA of the serving cell, and when the terminal device is accessed to the serving cell a and the decoupling cell B for uplink transmission, time offset of an uplink signal sent to the decoupling cell by the terminal device may occur, which affects uplink transmission performance. To avoid the loss of uplink signals by the decoupling cell B, the reception time of the decoupling cell B may be advanced by | T1-T2 |. However, this receiving time adjustment is at a cell level, and if there are multiple decoupled terminal devices in a decoupled cell, performance loss may still exist in some terminal devices due to different uplink transmission delays corresponding to the terminal devices.

The embodiment of the invention provides an uplink communication method.A serving cell determines a first uplink timing advance between a terminal device and a first network device. The first network device provides service for a serving cell where the terminal device is located, or the first network device provides service for a decoupling cell where the terminal device is located. Further, the serving cell sends a first uplink timing advance to the terminal device, and instructs the terminal device to adjust the sending timing of the uplink signal according to the first uplink timing advance. Therefore, in the method provided by the embodiment of the invention, the serving cell can flexibly switch the uplink timing advance of the terminal equipment. When the terminal equipment needs to send an uplink signal to the serving cell, the serving cell calculates the uplink timing advance of the serving cell and sends the uplink timing advance of the serving cell to the terminal equipment, so that the serving cell can receive the uplink signal sent by the terminal equipment without deviation. When the terminal equipment needs to send an uplink signal to the decoupling cell, the serving cell calculates the uplink timing advance of the decoupling cell and sends the uplink timing advance of the decoupling cell to the terminal equipment, so that the decoupling cell can receive the uplink signal sent by the terminal equipment without deviation, time offset of the uplink signal sent by the terminal equipment to the decoupling cell is avoided, and uplink transmission performance is guaranteed. In addition, the serving cell always calculates the uplink timing advance for maintaining the terminal equipment, and the terminal equipment only takes effect for one uplink timing advance without violating the single TA regulation in the existing standard. The method provided by the embodiment of the invention can reduce the influence of the time offset of the signals among the cells on the signal transmission performance as much as possible on the basis of the existing protocol.

The communication method provided by the embodiment of the present invention can be applied to the communication apparatus shown in fig. 3, and the communication apparatus can be a network device of a serving cell of a terminal device, such as a base station of the serving cell. As shown in fig. 3, the communication device may include at least one processor 301, a memory 302, a transceiver 303, and a communication bus 304.

The following describes each component of the communication apparatus in detail with reference to fig. 3:

the processor 301 is a control center of the communication apparatus, and may be a single processor or a collective term for a plurality of processing elements. For example, the processor 301 is a Central Processing Unit (CPU), an Application Specific Integrated Circuit (ASIC), or one or more Integrated circuits configured to implement embodiments of the present invention, such as: one or more microprocessors (digital signal processors, DSPs), or one or more Field Programmable Gate Arrays (FPGAs).

Among other things, the processor 301 may perform various functions of the communication device by running or executing software programs stored in the memory 302, as well as invoking data stored in the memory 302.

In particular implementations, processor 301 may include one or more CPUs such as CPU0 and CPU1 shown in fig. 3 for one embodiment.

In particular implementations, a communication device may include multiple processors, such as processor 301 and processor 305 shown in fig. 3, as one embodiment. Each of these processors may be a single-Core Processor (CPU) or a multi-Core Processor (CPU). A processor herein may refer to one or more communication devices, circuits, and/or processing cores for processing data (e.g., computer program instructions).

The Memory 302 may be a Read-Only Memory (ROM) or other types of static storage communication devices that can store static information and instructions, a Random Access Memory (RAM) or other types of dynamic storage communication devices that can store information and instructions, an Electrically Erasable Programmable Read-Only Memory (EEPROM), a Compact Disc Read-Only Memory (CD-ROM) or other optical Disc storage, optical Disc storage (including Compact Disc, laser Disc, optical Disc, digital versatile Disc, blu-ray Disc, etc.), but is not limited to, magnetic disk storage media or other magnetic storage communication devices, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer. The memory 302 may be self-contained and coupled to the processor 301 through a communication bus 304. The memory 302 may also be integrated with the processor 301.

The memory 302 is used for storing software programs for implementing the scheme of the present invention, and is controlled by the processor 301 to execute.

A transceiver 303 for communication with a second device. Of course, the transceiver 303 may also be used for communicating with a communication network, such as an ethernet, a Radio Access Network (RAN), a Wireless Local Area Network (WLAN), and so on. The transceiver 303 may include a receiving unit implementing a receiving function and a transmitting unit implementing a transmitting function.

The communication bus 304 may be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, an Extended ISA (EISA) bus, or the like. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown in FIG. 3, but this does not mean only one bus or one type of bus.

The communication device configuration shown in fig. 3 does not constitute a limitation of the communication device and may include more or fewer components than those shown, or some components may be combined, or a different arrangement of components.

An embodiment of the present invention provides an uplink communication method, as shown in fig. 4, the method includes the following steps:

401. determining a first uplink timing advance between the terminal equipment and the first network equipment; the first network equipment provides service for a service cell where the terminal equipment is located; or, the first network device provides service for the decoupling cell where the terminal device is located.

It should be noted that the method provided by the embodiment of the present invention is applicable to the communication system shown in fig. 1. The first network device may be a network device of a serving cell, for example, the first network device provides a service for the serving cell where the terminal device is located, the first network device is used for communication between the terminal device and a core network side, and the terminal device is accessed to the first network device to communicate with the core network side; the first network device may also be a network device of the decoupling cell, for example, the first network device provides a service for the decoupling cell where the terminal device is located, and the first network device may only receive an uplink signal sent by the terminal device.

Illustratively, the terminal device is a terminal device 300 in the communication system shown in fig. 1, the first network device may be a network device 100 in the communication system shown in fig. 1, and the first network device may also be a network device 200 in the communication system shown in fig. 1.

In a specific implementation, the serving cell may obtain an uplink transmission delay between the first network device and the terminal device, and further, the serving cell may calculate the first uplink timing advance according to the uplink transmission delay between the terminal device and the first network device.

In this embodiment of the present invention, the serving cell may obtain the uplink transmission delay between the first network device and the terminal device in the following two ways:

firstly, an uplink signal sent by the terminal device is measured to obtain an uplink transmission delay between the first network device and the terminal device.

If the first network device is a network device of a serving cell, for example, the first network device is a base station of the serving cell. The serving cell may measure an uplink signal sent by the terminal device in step 401 to obtain an uplink transmission delay between the terminal device and the first network device, and the serving cell may further calculate an uplink timing advance, that is, the first uplink timing advance according to the uplink transmission delay between the terminal device and the first network device.

Or, before step 401, the serving cell measures an uplink signal sent by the terminal device, obtains an uplink transmission delay between the terminal device and the first network device, and stores the uplink transmission delay between the terminal device and the first network device locally in the first network device. In step 401, the serving cell may locally obtain, at the first network device, uplink transmission information between the first network device and the terminal device, and calculate according to the uplink transmission information between the first network device and the terminal device.

And secondly, receiving the uplink transmission time delay between the first network equipment and the terminal equipment, which is sent by the first network equipment.

If the first network device provides service for the decoupling cell where the terminal device is located, the decoupling cell measures an uplink signal sent by the terminal device to obtain uplink transmission delay between the first network device and the terminal device, and the decoupling cell can also send the uplink transmission delay between the first network device and the terminal device to the serving cell. That is to say, in step 401, the serving cell may receive the uplink transmission delay sent by the first network device, and obtain the uplink transmission delay between the first network device and the terminal device.

402. And sending the first uplink timing advance to the terminal equipment, and indicating the terminal equipment to adjust the sending time sequence of an uplink signal according to the first uplink timing advance.

In a specific implementation, the serving cell sends the first uplink timing advance to the terminal device, and after receiving the first uplink timing advance, the terminal device may adjust a sending time domain of an uplink signal according to the first uplink timing advance, so as to implement flexible switching of uplink timing advances. Further, the first network device may receive the uplink signal transmitted by the terminal device without bias.

According to the method provided by the embodiment of the invention, the serving cell can flexibly switch the uplink timing advance of the terminal equipment, and when the first network equipment is the network equipment of the serving cell, the terminal equipment can adjust the uplink transmission time sequence according to the corresponding uplink timing advance of the serving cell, so that the serving cell can receive the uplink signal transmitted by the terminal equipment without deviation. When the first network device is a network device of the decoupling cell, the terminal device can adjust an uplink transmission timing sequence according to the uplink timing advance corresponding to the decoupling cell, so that the decoupling cell can receive uplink signals transmitted by the terminal device without deviation, a service cell or the decoupling cell can receive uplink signals transmitted by the terminal device without deviation, and the reduction of uplink transmission performance after the terminal device is accessed to the decoupling cell is avoided.

Optionally, before the serving cell acquires the uplink transmission information between the terminal device and the first network device in step 401, the method shown in fig. 4 may further include: and the service cell determines the frequency point of the uplink signal sent by the terminal equipment. Further, if the frequency point of the uplink signal sent by the terminal equipment is the frequency point of the first network equipment, the serving cell determines that the terminal equipment will send the uplink signal to the first network equipment. And the serving cell executes step 401 to determine a first uplink timing advance according to the uplink transmission information between the first network device and the terminal device, so that the terminal device can adjust an uplink transmission timing according to the first uplink timing advance, and the first network device can receive the uplink signal transmitted by the terminal device without deviation.

In a possible implementation manner, the serving cell may determine a frequency point at which the terminal device sends an uplink signal according to an uplink service requirement of the terminal device. For example, the serving cell determines that the terminal device is to send an uplink signal to the serving cell according to an uplink service requirement of the terminal device, calculates the first uplink timing advance according to an uplink transmission delay between the serving cell and the terminal device, and sends the calculated first uplink timing advance to the terminal device. And the service cell determines that the terminal equipment sends an uplink signal to the decoupling cell according to the uplink service requirement of the terminal equipment, calculates the first uplink timing advance according to the uplink transmission delay between the decoupling cell and the terminal equipment, and sends the calculated first uplink timing advance to the terminal equipment.

In the method provided by the embodiment of the invention, the serving cell can flexibly switch the uplink timing advance maintained by the terminal equipment according to the uplink service requirement of the terminal equipment, so that the serving cell or the decoupling cell can receive the uplink signal sent by the terminal equipment without deviation.

Optionally, after receiving the first uplink timing advance of the serving cell, the terminal device adjusts an uplink transmission timing according to the first uplink timing advance, and may transmit an uplink signal to the serving cell or the decoupling cell. If the first network device provides service for the decoupling cell, the first uplink timing advance is determined according to the uplink transmission delay between the decoupling cell and the terminal device. The terminal equipment sends an uplink signal according to the first uplink timing advance, and the decoupling cell can receive the uplink signal sent by the terminal equipment without deviation. However, the serving cell receives the uplink signal transmitted by the terminal device, and a time offset occurs, and a part of the uplink signal is lost.

Further, the serving cell may perform compensation processing on the received uplink signal according to a difference between the first uplink transmission delay and the second uplink transmission delay. The first uplink transmission delay is an uplink transmission delay between the terminal device and the first network device, and the second uplink transmission delay is an uplink transmission delay between the terminal device and the second network device.

In a specific implementation, the compensating, by the serving cell, the received uplink signal according to a difference between the first uplink transmission delay and the second uplink transmission delay includes:

converting the time domain signal Y (n) into a frequency domain signal Y (k); wherein N is 0,1, … N-1, k is 0,1, … P-1; the time domain signal y (N) is an uplink signal received by a serving cell, the N is a number of sample points included after the time domain signal y (N) is converted into a discrete digital signal, and the P is a number of sample points included in the frequency domain signal y (k);

m is the number of sample points corresponding to the time domain signal y (n) within the duration | T1-T2|, T1 is the first uplink transmission delay, and T2 is the second uplink transmission delay. Illustratively, a complete 1ms time domain signal contains 1000 sample points, and if T1-T2 is 0.5ms, then a 0.5ms duration time domain signal contains 500 sample points, which is the M value herein.

Of course, if the first network device provides service for the serving cell, the first uplink timing advance is determined according to the uplink transmission delay between the serving cell and the terminal device. The terminal equipment sends an uplink signal according to the first uplink timing advance, and the serving cell can receive the uplink signal sent by the terminal equipment without deviation. However, the uplink signal transmitted by the terminal equipment in the decoupling cell may generate a time offset, and a part of the uplink signal is lost.

Further, the serving cell may perform compensation processing on the received uplink signal according to a difference between the first uplink transmission delay and the second uplink transmission delay.

In a specific implementation, the compensating processing, performed by the decoupling cell, on the received uplink signal according to a difference between the first uplink transmission delay and the second uplink transmission delay includes:

converting the time domain signal Y (n) into a frequency domain signal Y (k); wherein N is 0,1, … N-1, k is 0,1, … P-1; the time domain signal y (N) is an uplink signal received by a decoupling cell, the N is the number of sample points included after the time domain signal y (N) is converted into a discrete digital signal, and the P is the number of sample points included in the frequency domain signal y (k);

m is the number of sample points corresponding to the time domain signal y (n) within the duration | T1-T2|, T1 is the first uplink transmission delay, and T2 is the second uplink transmission delay. Illustratively, a complete 1ms time domain signal contains 1000 sample points, T1-T2 if 0.5ms, then the time domain signal of 0.5ms duration contains 500 sample points, which are here the M values.

An embodiment of the present invention further provides an uplink communication method, as shown in fig. 5, the method includes the following steps:

501. after the terminal device accesses the serving cell, the serving cell obtains an uplink transmission delay T1 according to the measurement of the uplink signal sent by the terminal device at the frequency point a.

Wherein, the frequency point A is the frequency point of the serving cell. After the terminal device accesses the serving cell, the terminal device sends an uplink signal at the frequency point a, and the serving cell may determine the uplink transmission delay T1 between the terminal device and the serving cell according to the uplink signal sent by the terminal device.

502. The serving cell calculates an uplink timing advance TA1 according to the uplink transmission delay T1, and transmits TA1 to the terminal device through the downlink control information, and the user adjusts the uplink transmission timing based on TA 1.

After the terminal device adjusts the uplink transmission timing according to TA1, the signal receiving effect shown in fig. 6 can be achieved. That is, the serving cell can synchronously and completely receive the uplink signal sent by the terminal device at the frequency point a.

In addition, the terminal equipment is allowed to be decoupled to the frequency point B after being accessed into the service cell, and a cell corresponding to the frequency point B exists. In the embodiment of the present invention, the cell corresponding to the frequency point B is referred to as a decoupling cell. However, because there is a deviation between the uplink transmission delay between the terminal device and the decoupling cell and the uplink transmission delay between the terminal device and the serving cell, for example, the uplink transmission delay T2 between the terminal device and the decoupling cell is smaller than the above-mentioned T1, if the terminal device adjusts the uplink transmission timing according to TA1, that is, the time when the decoupling cell receives the uplink signal is consistent with the time when the serving cell receives the uplink signal, the decoupling cell will lose a part of the uplink signal when the terminal device transmits the uplink signal at frequency point B.

503. The decoupling cell determines an uplink transmission delay T2 between the decoupling cell and the terminal device by measuring an uplink signal sent by the terminal device, and sends the uplink transmission delay T2 to the serving cell.

The uplink transmission delay T2 sent by the decoupling cell may be regarded as uplink transmission information between the first network device and the terminal device according to the embodiment of the present invention. In this scenario, the first network device provides service for the decoupling cell, that is, the network device corresponding to the frequency point B. The second network device provides service for the serving cell, that is, the network device corresponding to the frequency point a.

504. And the serving cell receives the uplink transmission delay T2 from the decoupling cell, and if T2 is not equal to T1, the uplink timing advance TA2 is calculated according to T2.

In a specific implementation, the serving cell may recalculate an uplink timing advance TA2 according to T2.

In a possible implementation manner, the adjustment amount Δ TA of the timing advance may also be calculated according to the following formula, and the adjustment amount is sent to the terminal device, so that the terminal device adjusts the uplink timing advance currently maintained according to Δ TA. For example, TA is adjusted 1 based on Δ TA. The specific formula for calculating Δ TA is referenced as follows:

wherein μ represents a subcarrier spacing coefficient, μ is an integer greater than or equal to 1, a specific value can be selected according to protocol specification, and Tc represents a sampling interval.

505. The serving cell sends the uplink timing advance TA2 to the terminal device through the downlink control information.

After receiving the uplink timing advance TA2 sent by the serving cell, the terminal device adjusts the uplink transmission timing according to the uplink timing advance TA 2. After adjusting the uplink transmission timing, the terminal device achieves the signal receiving effect shown in fig. 6. Namely, the decoupling cell can receive uplink signals from the terminal equipment without loss, and the maximum decoupling performance is obtained. The serving cell receives the uplink information from the terminal device in advance, and uplink transmission performance is lost.

506. And the serving cell performs compensation processing on the received uplink signal.

In a specific implementation, since the terminal device adjusts the uplink transmission timing according to the uplink timing advance TA2, the uplink received signal of the serving cell is damaged. The serving cell may perform compensation and correction on the uplink signal received by the serving cell based on the difference between T1 and T2, which is specifically as follows:

firstly, converting a time domain signal Y (n) into a frequency domain signal Y (k); wherein N is 0,1, … N-1, k is 0,1, … P-1; a time domain signal y (n) is an uplink signal sent by the terminal device on the frequency point of the second network device;

in addition, the compensation process is performed on y (k) to obtain z (k) ═ y (k) × W^Mk(ii) a Wherein the content of the first and second substances,

m is the number of sample points corresponding to the absolute value of T1-T2, T1 is the first uplink transmission delay, and T2 is the second uplink transmission delay.

In the method provided by the embodiment of the invention, the uplink timing adjustment quantity between the terminal equipment and the decoupling cell is calculated according to the uplink transmission delay between the decoupling cell and the terminal equipment, so that the performance of uplink transmission after the terminal equipment is decoupled to the decoupling cell is optimal. In addition, after the serving cell receives the uplink signal sent by the terminal device, the uplink measurement result of the serving cell is compensated and corrected based on the uplink transmission delay deviation of the serving cell/decoupling cell, so that the influence on the uplink transmission performance of the serving cell is reduced to the maximum extent. Compared with the prior art, the method provided by the embodiment of the invention is suitable for the constraint of the current protocol version single TA, and the influence of inter-cell signal time offset caused by decoupling of the terminal equipment can be reduced without changing the existing protocol.

An embodiment of the present invention further provides an uplink communication method, as shown in fig. 7, the method includes the following steps:

701. and the decoupling cell and the service cell respectively calculate uplink timing advance TA1 and TA2 with the terminal equipment.

For example, the decoupling cell receives an uplink signal sent by the terminal device at a frequency point of the decoupling cell, and obtains an uplink transmission delay between the decoupling cell and the terminal device by measuring the uplink signal, and the decoupling cell may further calculate an uplink timing advance TA1 between the decoupling cell and the terminal device according to the uplink transmission delay between the decoupling cell and the terminal device.

The serving cell receives an uplink signal sent by the terminal device at a frequency point of the serving cell, obtains an uplink transmission delay between the serving cell and the terminal device by measuring the uplink signal, and can also calculate an uplink timing advance TA2 between the serving cell and the terminal device according to the uplink transmission delay between the serving cell and the terminal device.

702. The serving cell receives the uplink timing advance TA2 sent by the decoupling cell.

703. And the service cell determines the uplink timing advance of the terminal equipment according to the uplink service information, the uplink measurement signal sending behavior and other information of the terminal equipment.

In specific implementation, a serving cell determines a frequency point of an uplink signal sent by the terminal equipment; and determining the uplink timing advance of the terminal equipment according to the frequency point of the uplink signal sent by the terminal equipment. Step 703 is that the uplink timing advance of the terminal device determined by the serving cell is the first uplink timing advance described in the embodiment of the present invention, and the uplink timing advance currently maintained by the terminal device is the second uplink timing advance described in the embodiment of the present invention.

For example, if the serving cell determines that the terminal device is to send an uplink signal at a frequency point (e.g., frequency point a) of the serving cell, TA1 is determined to be the uplink timing advance of the terminal device.

If the serving cell determines that the terminal device is to send an uplink signal at a frequency point (e.g., frequency point B) of the decoupling cell, TA2 is determined to be the uplink timing advance of the terminal device.

704. And the serving cell sends the uplink timing advance of the terminal device determined in step 703 to the terminal device.

And after receiving the uplink timing advance sent by the serving cell, the terminal equipment adjusts the uplink sending time sequence according to the uplink timing advance. For example, the terminal device adjusts the uplink transmission timing according to TA1, so that the serving cell receives the uplink signal sent by the terminal device without loss; or, the terminal device adjusts the uplink transmission timing according to TA2, so that the uplink signal transmitted by the terminal device is received without loss by the decoupling cell.

In the method provided by the embodiment of the invention, the TA value can be adjusted according to the actual uplink requirement of the terminal equipment, so that the serving cell and the decoupling cell can receive the uplink signal of the user without loss. In addition, the method provided by the embodiment of the invention is suitable for the constraint of the current protocol version single TA, and the influence of inter-cell signal time offset caused by decoupling of the terminal equipment can be reduced without changing the existing protocol.

Referring to fig. 8, some terminal devices access a serving cell, and some terminal devices access a decoupling cell while accessing the serving cell. For the same cell, a terminal device accessing the cell may be referred to as a terminal device of the cell, and a terminal device accessing an adjacent decoupling cell may be referred to as an adjacent decoupling terminal device. A cell may receive uplink signals from the terminal device of the cell and the decoupling terminal device of the neighboring cell at the same time. For the terminal equipment in the cell, the uplink signals of all the terminal equipment in the cell can reach the receiving side at the same time by configuring the TA value, and the cell only needs to determine a receiving time according to the TA, and can receive the uplink signals of all the terminal equipment accessed in the cell without damage at the receiving time. However, for the terminal devices decoupled from the neighboring cell, since the TA value of the terminal device is possibly adjusted based on the neighboring cell to which the terminal device belongs, the TA of the cell adjusts the uplink transmission timing sequences of the terminal devices, and the time when the uplink signals of the terminal devices reach the current cell are not consistent, which may cause a loss when the receiving side receives the uplink signals of the terminal devices. For example, the uplink signal of the neighboring decoupling terminal device 1 reaches the current cell in advance, while the uplink signal of the neighboring decoupling terminal device 2 reaches the current cell in delay, and both the uplink signals of the two terminal devices have loss in uplink signal reception of the current cell.

Therefore, an embodiment of the present invention further provides a receiving time adjustment method, which can calculate an optimal uplink receiving time by combining uplink time delays of terminal devices in a local cell, so as to minimize an overall loss of uplink signal reception of all terminal devices including the terminal device in the local cell and the terminal device in an adjacent cell. As shown in fig. 9, the method comprises the steps of:

901. and acquiring uplink transmission time delays of all the terminal equipment of the cell and the adjacent cell decoupling terminal equipment of the target cell.

Illustratively, 50 terminal devices are accessed under a target cell, wherein 20 terminal devices are only accessed to the target cell and are not accessed to a decoupling cell adjacent to the target cell, and the 20 terminal devices are called terminal devices of the cell; the other 30 terminal devices are also accessed to the decoupling cell, and the 30 terminal devices are called neighbor decoupling terminal devices.

Assuming that the uplink transmission time delay of signals of all the terminal equipment in the cell and the neighboring cell decoupling terminal equipment to reach the target cell is t (k), where k is 0,1. Wherein, N is the total number of all terminal devices of the target cell and the neighboring cell decoupling terminal devices, and the uplink transmission delays of the N terminal devices are respectively T (0) and T (1) … T (N-1). In addition, the initial value of t (k) of each terminal device is 0.

902. And determining the signal quality loss values of all the terminal equipment of the local cell and the adjacent cell decoupling terminal equipment of the target cell.

Specifically, when the target cell receives the uplink signal of each terminal device, the relationship between the uplink transmission delay and the signal quality loss value satisfies L_k(t) of (d). Wherein L (t) is a function with uplink transmission delay as an argument, and the signal quality loss values of the N terminal devices may be L₀(t)、L₁(t)……L_N-1(t)。

Further, the signal quality loss expression of all the terminal devices is alloss ═ Func (L)_k(t))。

The Func (…) function represents the accumulated value of signal quality loss of all terminal devices, and may be linear accumulation or other accumulation modes.

903. Calculating minimum deviation value T of uplink transmission time delay_min。

In particular, assume that the first time is according to alloss ═ Func (L)_k(t)), obtainingThe loss of signal quality of the terminal equipment is Alllos-default. Then, within a certain deviation range (T1, T2), a deviation value T which enables Alllos to be minimum is searched_min. Wherein, the deviation value refers to the deviation of the uplink transmission delay. It should be noted that Func (L) may be paired at different times_k(t)) are adjusted, as the parameters change, the result of the function also changes. That is, at different times, Func (L)_k(t)) may have different results. At the first moment, according to Func (L)_k(t)) can obtain the signal quality loss X of all the terminal devices, and when the time deviation is adjusted by taking the first time as a reference, the time deviation is adjusted according to Func (L)_k(t)) different signal quality losses can be obtained. Illustratively, where the deviation value is T_minI.e. the second moment (equal to the first moment ± T)_min) And adjusting the parameters of the function to obtain the signal quality loss Y of the terminal equipment.

In particular, it can be applied to Func (L)_k(t)) some parameters are subjected to filtering processing that changes with time, or a latest parameter may be directly adopted, or a parameter that does not change for a long time may be adopted, which is not limited in the embodiment of the present invention.

For each uplink transmission delay within the range (T1, T2), e.g. T_sUpdating the T (k) value of all terminal equipment to T (k) -T_sAnd recalculates alloss. Traverse the possible T_sThen, the deviation value T which minimizes Alllos is taken_sIs the above-mentioned T_min. Illustratively, if the terminal device signal quality loss Y is at all possible T_sThe minimum of the resulting signal quality losses, T can be determined_minIs the minimum deviation value of the uplink transmission delay.

Further, according to T_minAnd updating the T (k) values corresponding to all the terminal equipment, and recalculating the signal quality loss values of all the terminal equipment according to the updated T (k) values of all the terminal equipment, namely the Alllos-final.

904. If Alllos-final<Adjusting the receiving time of the uplink signal of the target cell by T_min。

Note that T is_minEither positive or negative. If T is_minIf the value is positive, the receiving time of the uplink signal of the target cell is advanced by T_minIf T is_minIf the value is negative, the receiving time of the uplink signal of the target cell is delayed by T_min。

It should be noted that in the method shown in fig. 9, a baseband unit of a network device (e.g., a base station) acquires the uplink transmission delay, and sends the acquired delay to a scheduling unit of the network device. After acquiring the uplink transmission delay information of all terminal devices, the scheduling unit performs subsequent calculation to obtain an optimal delay adjustment amount, that is, the minimum deviation value T in the embodiment of the present invention_min. The scheduling unit can also convert the time delay adjustment amount into an adjustment amount which can be identified by the terminal equipment and sends the adjustment amount to the terminal equipment.

Referring to fig. 10, in the method provided in the embodiment of the present invention, the uplink time delays of all neighboring decoupling terminal devices are calculated, and the uplink time delay of the local cell access terminal device is combined to calculate the optimal uplink receiving time, so that the overall loss of uplink signal reception of all terminal devices is minimized. In fig. 8, the uplink signal of the serving cell terminal device 1 may be received without loss, the uplink signal of the neighboring decoupling terminal device 1 reaches the current cell in advance, the uplink signal of the neighboring decoupling terminal device 2 reaches the current cell in delay, and the uplink signal reception of the two decoupling terminal devices in the current cell is lost. After the uplink receiving time is adjusted according to the method provided by the embodiment of the present invention, the uplink signal of the neighboring decoupling terminal device 2 can be received without loss, and although there is some loss in the uplink signals sent by the serving cell terminal device 1 and the decoupling cell terminal device 3, the overall signal loss of the serving cell terminal device 1, the neighboring decoupling terminal device 2 and the decoupling cell terminal device 3 is reduced compared with that of fig. 8, thereby ensuring the overall performance of the communication system.

Fig. 11 shows a schematic diagram of a possible structure of the communication device according to the above-described embodiment, in a case where each functional module is divided according to each function. The communication device shown may be a network equipment of a serving cell, such as a base station of a serving cell. As shown in fig. 11, the communication apparatus includes a processing unit 1101 and a communication unit 1102.

A processing unit 1101, configured to enable the communication apparatus to perform step 401, step 501, step 504, step 506, step 701, and step 703 in the above-described embodiments, and/or other processes for the techniques described herein.

A communication unit 1102 for enabling the communication device to perform steps 402, 502, 503, 505, 702, and 704 in the above embodiments, and/or other processes for the techniques described herein.

It should be noted that all relevant contents of each step related to the above method embodiment may be referred to the functional description of the corresponding functional module, and are not described herein again.

For example, in the case of using an integrated unit, a schematic structural diagram of a communication device provided in an embodiment of the present application is shown in fig. 12. In fig. 12, the communication apparatus includes: a processing module 1201 and a communication module 1202. The processing module 1201 is used to control and manage the actions of the communication device, e.g., to perform the steps performed by the processing unit 1101 described above, and/or to perform other processes for the techniques described herein. The communication module 1202 is configured to perform the steps performed by the communication unit 1102, and support interaction between the communication apparatus and other devices, for example, interaction between a serving cell and a decoupling cell, and interaction between terminal devices. As shown in fig. 12, the communication device may further include a storage module 1203, and the storage module 1203 is used for storing program codes and data of the communication device.

When the processing module 1201 is a processor, the communication module 1202 is a transceiver, and the storage module 1203 is a memory, the communication device is the communication device shown in fig. 3.

Through the description of the above embodiments, it is clear to those skilled in the art that, for convenience and simplicity of description, the foregoing division of the functional modules is merely used as an example, and in practical applications, the above functions may be distributed by different functional modules according to needs, that is, the internal structure of the database access apparatus may be divided into different functional modules to complete all or part of the above described functions.

In the several embodiments provided in the present application, it should be understood that the disclosed database access apparatus and method may be implemented in other ways. For example, the above-described database access device embodiments are merely illustrative, and for example, the division of the modules or units is only one logical division, and there may be other divisions when actually implemented, for example, multiple units or components may be combined or integrated into another device, or some features may be omitted, or not executed. In addition, the shown or discussed coupling or direct coupling or communication connection between each other may be an indirect coupling or communication connection through some interfaces, database access devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may be one physical unit or a plurality of physical units, that is, may be located in one place, or may be distributed in a plurality of different places. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.

The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a readable storage medium. Based on such understanding, the technical solutions of the embodiments of the present application may be essentially or partially contributed to by the prior art, or all or part of the technical solutions may be embodied in the form of a software product, where the software product is stored in a storage medium and includes several instructions to enable a device (which may be a single chip microcomputer, a chip, or the like) or a processor to execute all or part of the steps of the methods described in the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a U disk, a removable hard disk, a ROM, a RAM, a magnetic disk, or an optical disk.

The above description is only an embodiment of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions within the technical scope of the present disclosure should be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. An uplink communication method, comprising:

determining a first uplink timing advance between the terminal equipment and the first network equipment; the first network equipment provides service for the decoupling cell where the terminal equipment is located; the decoupling cell is a cell for decoupling an uplink signal of the terminal device;

and sending the first uplink timing advance to the terminal equipment, and indicating the terminal equipment to adjust the sending time sequence of an uplink signal according to the first uplink timing advance.

2. The method of claim 1, wherein the determining the first uplink timing advance between the terminal device and the first network device specifically comprises:

acquiring uplink transmission delay between the first network equipment and the terminal equipment;

and calculating the first uplink timing advance according to the uplink transmission delay between the terminal equipment and the first network equipment.

3. The method of claim 2, wherein the obtaining the uplink transmission delay between the first network device and the terminal device comprises:

receiving the uplink transmission delay sent by the first network equipment; or the like, or, alternatively,

and measuring an uplink signal sent by the terminal equipment to obtain the uplink transmission time delay.

4. The method of any of claims 1-3, wherein prior to determining the first uplink timing advance between the terminal device and the first network device, the method further comprises:

and determining the frequency point of the uplink signal sent by the terminal equipment as the frequency point of the first network equipment.

5. The method according to any one of claims 1-3, further comprising:

a serving cell receives an uplink signal sent by the terminal equipment; the timing advance of the uplink signal sent by the terminal equipment is the first uplink timing advance;

compensating the received uplink signal according to the difference value of the first uplink transmission time delay and the second uplink transmission time delay; the first uplink transmission delay is the uplink transmission delay between the terminal device and the serving cell, and the second uplink transmission delay is the uplink transmission delay between the terminal device and the decoupling cell.

6. The method of claim 5, wherein the compensating the received uplink signal according to the difference between the first uplink transmission delay and the second uplink transmission delay comprises:

converting the time domain signal Y (n) into a frequency domain signal Y (k); wherein N is 0,1, … N-1, k is 0,1, … P-1; wherein, time domain signal y (N) is the received uplink signal, N is the number of sample points included after the time domain signal y (N) is converted into a discrete digital signal, and P is the number of sample points included in the frequency domain signal y (k);

m is the number of sample points corresponding to the time domain signal y (n) within the duration | T1-T2|, T1 is the first uplink transmission delay, and T2 is the second uplink transmission delay.

7. An uplink communication method, comprising:

determining a first uplink timing advance between the terminal equipment and the first network equipment; the first network equipment provides service for a service cell where the terminal equipment is located;

sending the first uplink timing advance to the terminal equipment, and indicating the terminal equipment to adjust the sending time sequence of an uplink signal according to the first uplink timing advance;

compensating the received uplink signal according to the difference value of the first uplink transmission time delay and the second uplink transmission time delay; the first uplink transmission delay is the uplink transmission delay between the terminal equipment and the service cell, and the second uplink transmission delay is the uplink transmission delay between the terminal equipment and the decoupling cell; the decoupling cell is a cell for decoupling an uplink signal of the terminal device.

8. The method according to claim 7, wherein the determining the first uplink timing advance between the terminal device and the first network device specifically includes:

9. The method of claim 8, wherein the obtaining the uplink transmission delay between the first network device and the terminal device comprises:

10. The method according to any of claims 7-9, wherein before determining the first uplink timing advance between the terminal device and the first network device, the method further comprises:

11. The method of claim 7, wherein the compensating the received uplink signal according to the difference between the first uplink transmission delay and the second uplink transmission delay comprises:

12. A communications apparatus, comprising:

the processing unit is used for determining a first uplink timing advance between the terminal equipment and the first network equipment; the first network equipment provides service for the decoupling cell where the terminal equipment is located; the decoupling cell is a cell for decoupling an uplink signal of the terminal device;

and the communication unit is used for sending the first uplink timing advance to the terminal equipment and instructing the terminal equipment to adjust the sending time sequence of the uplink signal according to the first uplink timing advance.

13. The communications apparatus according to claim 12, wherein the processing unit is specifically configured to obtain an uplink transmission delay between the first network device and the terminal device; and calculating the first uplink timing advance according to the uplink transmission delay between the terminal equipment and the first network equipment.

14. The apparatus according to claim 13, wherein the communication unit is further configured to receive the uplink transmission delay sent by the first network device; or the like, or, alternatively,

the processing unit is further configured to measure an uplink signal sent by the terminal device to obtain the uplink transmission delay.

15. The apparatus according to any one of claims 12 to 14, wherein before the processing unit determines the first uplink timing advance between the terminal device and the first network device, it determines that the frequency point at which the terminal device sends the uplink signal is the frequency point of the first network device.

16. The communication apparatus according to any of claims 12 to 14, wherein the communication unit is further configured to receive an uplink signal sent by the terminal device; the timing advance of the uplink signal sent by the terminal equipment is the first uplink timing advance;

the processing unit is further configured to perform compensation processing on the received uplink signal according to a difference between the first uplink transmission delay and the second uplink transmission delay; the first uplink transmission delay is the uplink transmission delay between the terminal device and the serving cell, and the second uplink transmission delay is the uplink transmission delay between the terminal device and the decoupling cell.

17. The communication device according to claim 16, wherein the processing unit is specifically configured to,

18. A communications apparatus, comprising:

the processing unit is used for determining a first uplink timing advance between the terminal equipment and the first network equipment; the first network equipment provides service for a service cell where the terminal equipment is located;

a communication unit, configured to send the first uplink timing advance to the terminal device, and instruct the terminal device to adjust a transmission timing of an uplink signal according to the first uplink timing advance;

the communication unit is further configured to receive an uplink signal sent by the terminal device; the timing advance of the uplink signal sent by the terminal equipment is the first uplink timing advance;

the processing unit is further configured to perform compensation processing on the received uplink signal according to a difference between the first uplink transmission delay and the second uplink transmission delay; the first uplink transmission delay is the uplink transmission delay between the terminal equipment and the service cell, and the second uplink transmission delay is the uplink transmission delay between the terminal equipment and the decoupling cell; the decoupling cell is a cell for decoupling an uplink signal of the terminal device.

19. The communications apparatus according to claim 18, wherein the processing unit is specifically configured to obtain an uplink transmission delay between the first network device and the terminal device; and calculating the first uplink timing advance according to the uplink transmission delay between the terminal equipment and the first network equipment.

20. The communications apparatus according to claim 19, wherein the communications unit is further configured to receive the uplink transmission delay sent by the first network device; or the like, or, alternatively,

21. The apparatus according to any one of claims 18 to 20, wherein before the processing unit determines the first uplink timing advance between the terminal device and the first network device, it determines that the frequency point at which the terminal device sends the uplink signal is the frequency point of the first network device.

22. The communication device according to claim 18, wherein the processing unit is specifically configured to,

m is the corresponding sample point number of the time domain signal Y (n) in the time length of | T1-T2|, T1T2 is the first uplink transmission delay, and T is the second uplink transmission delay.

23. A communications device comprising at least one processor and a memory, the at least one processor coupled to the memory, the at least one processor configured to implement the method for upstream communications of any of claims 1-6, or any of claims 7-11.