WO2022099611A1

WO2022099611A1 - Communication method and apparatus

Info

Publication number: WO2022099611A1
Application number: PCT/CN2020/128676
Authority: WO
Inventors: 杨�远; 马东; 周海涛; 汪浩; 江长国
Original assignee: 华为技术有限公司
Priority date: 2020-11-13
Filing date: 2020-11-13
Publication date: 2022-05-19
Also published as: CN116458104A

Abstract

A communication method and apparatus. The method comprises: a first terminal device receives a first message from a network device, the first message comprising the interference information of a first interference port in the first terminal device; and the first terminal device performs multi-user (MU) joint detection according to the interference information of the first interference port. By using the method and apparatus of the embodiments of the present application, a terminal device does not need to estimate the interference information of an interference port by itself, thereby reducing the complexity of the MU joint detection of the terminal device.

Description

A communication method and device

technical field

The present application relates to the field of communication technologies, and in particular, to a communication method and device.

Background technique

In the new radio interface (NR), the base station antenna scale is improved compared to the long term evolution (LTE), and the multi-user multiple input multiple output (MU-MIMO) scenario is more common. One type of demodulation reference signal (DMRS) supports 8-port orthogonal pilots, the second type of DMRS supports 12-port orthogonal pilots, and NR also supports non-orthogonal pilots. This makes the interference of multi-user (MU) paired terminal devices more common in NR.

In an example, 8 ports are used to transmit signals of 4 UEs respectively, the indices of the 8 ports are 0 to 7 in sequence, the indices of the 4 UEs are 0 to 3 in sequence, and UE0 to UE3 occupy ports (0, 1), (2, 3), (4, 5) and (6, 7). For UE0, the serving ports are 0 and 1, and the interfering ports are 2 to 7.

Currently, the base station only notifies the UE of the relevant information of the serving port, and does not notify the UE of the relevant information of the interference port. One option of the UE is to use the interference port signal as the noise floor, but the performance is too poor; the other option for the UE to perform MU joint detection is to estimate the relevant information of the interference port by itself, which has good performance but is complex for the UE. high.

SUMMARY OF THE INVENTION

The present application provides a communication method and apparatus to reduce the complexity of joint detection of terminal equipment MU.

In a first aspect, a communication method is provided, and the subject of the method is a terminal device. It can be understood that the terminal device may be a terminal device, and may also be a component (chip, circuit or others) configured in the terminal device, and the method includes: the first terminal device receives a first message from a network device, the said The first message includes interference information of the first interference port in the first terminal device; the first terminal device performs joint multi-user MU detection according to the interference information of the first interference port.

Through the above method, the network device directly indicates the interference information of the interference port of the terminal device to the terminal device, and the terminal device does not need to estimate by itself, which reduces the complexity of joint detection by the terminal device MU.

Optionally, the interference information of the first interference port includes at least one of the following items: the index of the first interference port, the modulation order of the first interference port, the PRG information of the precoding resource block group of the first interference port, the first interference port The quasi-co-sited QCL relationship of the interference port, the starting position and length of the time domain symbol of the physical downlink shared channel PDSCH of the first interference port, and the frequency domain scheduling pattern.

In a possible implementation manner, the receiving, by the first terminal device, the first message from the network device includes: receiving, by the first terminal device, high-level signaling from the network device, where the high-level signaling includes the QCL relationship of the first interference port; the first terminal device receives downlink control information DCI from the network device, and the DCI includes the first interference port index, the first interference port modulation order, and the PRG information of the first interference port , the starting position and length of the time-frequency symbol of the first interference port PDSCH, and the frequency-domain scheduling pattern.

Optionally, the method further includes: the first terminal device sends a second message to the network device, where the second message is used to indicate whether the first terminal device supports the capability of MU joint detection.

Optionally, the method further includes: the first terminal device measures the interference strengths of all interference ports detected by the first terminal device; when the first terminal device detects that there is an interference strength greater than the interference strength of the first interference port When the second interference port is used, send the first feedback information to the network device; or, when the first terminal device detects that the interference strength of the first interference port is less than the first threshold, send the second feedback information to the network device; Alternatively, when the first terminal device detects that the interference strength of the first interference port is less than the second threshold, it sends third feedback information to the network device.

Through the above method, the terminal device can feed back the information of the interference port to the network device, and the network device adjusts the indication information of the interference port according to the feedback from the terminal device, so that the indication of the interference port is more accurate.

In a possible implementation manner, the method further includes: the terminal device receives high-level signaling from the network device, where the high-level signaling includes the QCL relationship of multiple interference ports; for the QCL relationship of each interference port, respectively Carry out long-term tracking, calculate and pre-store the PDP spectrum and Doppler power spectrum corresponding to each interference port; the DCI includes the QCL relationship of the activated interference port; the terminal equipment is in the above-mentioned pre-stored PDP spectrum and Doppler power spectrum. , select the PDP spectrum and Doppler power spectrum corresponding to the activated interference port; according to the selected PDP spectrum and Doppler power spectrum, calculate the frequency domain correlation coefficient and the time domain correlation coefficient, and the frequency domain correlation coefficient and time domain correlation coefficient are calculated. The frequency correlation coefficients are used for Wiener filtering channel estimation.

In a second aspect, a communication method is provided, and the execution body of the method is a network device. It can be understood that the network device may also be a component (chip, circuit or others) configured in the network device, and the method includes: the network device selects the first interference port from the interference ports of the first terminal device; the said The network device sends a first message to the first terminal device, where the first message is used to indicate interference information of the first interference port, and the interference information of the first interference port is used for the first terminal device to perform multi-user MU association detection.

Through the above method, the network device selects some of the interference ports among all the interference ports of the terminal device, and indicates the interference information. In contrast, the network device indicates the interference information of all interference ports of the terminal device to the terminal device, which can reduce signaling overhead.

In a possible implementation manner, the interference information of the first port includes at least one of the following: a first interference port index, a modulation order of the first interference port, and PRG information of a precoding resource block group of the first interference port , the quasi-co-sited QCL relationship of the first interference port, the starting position and length of the time domain symbol of the physical downlink shared channel PDSCH of the first interference port, and the frequency domain scheduling pattern.

Optionally, the network device sending the first message to the first terminal device includes: the network device sending high-level signaling to the first terminal device, where the high-level signaling includes the information of the first interference port. QCL relationship; the network device sends downlink control information DCI to the first terminal device, where the DCI includes the first interference port index, the first interference port modulation order, and the precoding resource block group PRG of the first interference port information, the time-domain symbol start position and length of the first interference port PDSCH, and the frequency-domain scheduling pattern.

In a possible implementation manner, the network device determining the first interference port among the interference ports of the first terminal device includes: the network device determining a potential paired terminal device of the first terminal device, the The potential paired terminal device refers to a terminal device with the same scheduling time slot as the first terminal device, the same physical resource block PRB in whole or in part, and a different port, and the potential paired terminal device includes at least one terminal device; when the When the potential paired terminal devices of the first terminal device include multiple terminal devices, calculate the magnitude of the interference between each potential paired terminal device and the first terminal device; If the magnitude of interference between them is different, a potential paired terminal device that satisfies the condition is determined; the service port corresponding to the potential paired terminal device that meets the condition is the first interference port.

In a possible implementation manner, the method further includes: receiving, by the network device, a second message from the first terminal device, where the second message is used to indicate whether the terminal device supports MU joint detection.

Optionally, the method further includes: receiving, by the network device, first feedback information from the first terminal device, where the first feedback information is that the first terminal device detects that there is an interference intensity greater than that of the first terminal device. A second interference port of the interference strength of the interference port; the network device determines, according to the first feedback information, whether to increase the interference information indication of the second interference port within the subsequent transmission time interval TTI, or whether to add the first interference information The interference information indication of the interference port is replaced with the interference information indication of the second interference port. or,

receiving, by the network device, second feedback information from the first terminal device, where the second feedback information is used to indicate that the first terminal device side detects that the interference strength of the first interference port is less than a first threshold; The network device increases the threshold for selecting the first interference port according to the second feedback information. or,

receiving, by the network device, third feedback information from the first terminal device, where the third feedback information is used to indicate that the first terminal device side detects that the interference strength of the first interference port is greater than a second threshold; The network device lowers the selection threshold of the first interference port according to the third feedback information.

In a third aspect, an embodiment of the present application further provides a device, and the beneficial effects can be found in the description of the first aspect. The apparatus has the function of implementing the behavior in the method embodiment of the first aspect. The functions can be implemented by executing corresponding hardware or software. The hardware or software includes one or more modules/units corresponding to the above functions. In a possible design, the apparatus includes: a communication unit, configured to receive a first message from a network device, where the first message includes interference information of a first interference port in the first terminal device; a processing unit , which is used to perform joint multi-user MU detection according to the interference information of the first interference port. These units may perform the corresponding functions in the method examples of the first aspect. For details, refer to the detailed descriptions in the method examples, which will not be repeated here.

In a fourth aspect, an apparatus is provided, and the beneficial effects can be found in the description of the second aspect. The apparatus has the function of implementing the behavior in the method embodiment of the second aspect. The functions can be implemented by executing corresponding hardware or software. The hardware or software may include one or more modules/units corresponding to the above functions. In a possible design, the apparatus includes: a processing unit for selecting a first interference port among interference ports of the first terminal device; a communication unit for sending a first message to the first terminal device, the The first message is used to indicate interference information of the first interference port, and the interference information of the first interference port is used for the first terminal device to perform joint multi-user MU detection. These units may perform the corresponding functions in the method examples of the second aspect. For details, please refer to the detailed descriptions in the method examples, which will not be repeated here.

In a fifth aspect, an apparatus is provided, and the apparatus may be the terminal device in the method embodiment of the first aspect, or a chip provided in the terminal device. The apparatus includes a communication interface, a processor, and optionally, a memory. The memory is used to store computer programs or instructions, and the processor is coupled to the memory and the communication interface, and when the processor executes the computer program or instructions, the apparatus is made to execute the method executed by the terminal device in the method embodiment of the first aspect. method.

In a sixth aspect, an apparatus is provided, and the apparatus may be the network device in the method embodiment of the second aspect, or a chip provided in the network device. The apparatus includes a communication interface, a processor, and optionally, a memory. The memory is used to store computer programs or instructions, and the processor is coupled to the memory and the communication interface, and when the processor executes the computer program or instructions, the apparatus is made to execute the method executed by the network device in the method embodiment of the second aspect. method.

In a seventh aspect, a computer program product is provided, the computer program product includes: computer program code, when the computer program code is executed, the method performed by the terminal device in the above-mentioned first aspect is executed.

In an eighth aspect, a computer program product is provided, the computer program product comprising: computer program code, when the computer program code is executed, the method performed by the network device in the above second aspect is executed.

In a ninth aspect, the present application provides a chip system, where the chip system includes a processor for implementing the functions of the terminal device in the method of the first aspect above. In a possible design, the chip system further includes a memory for storing program instructions and/or data. The chip system may be composed of chips, or may include chips and other discrete devices.

In a tenth aspect, the present application provides a chip system, where the chip system includes a processor for implementing the function of the network device in the method of the second aspect above. In a possible design, the chip system further includes a memory for storing program instructions and/or data. The chip system may be composed of chips, or may include chips and other discrete devices.

In an eleventh aspect, the present application provides a computer-readable storage medium, where a computer program is stored in the computer-readable storage medium, and when the computer program is executed, the method executed by the terminal device in the above-mentioned first aspect is implemented.

In a twelfth aspect, the present application provides a computer-readable storage medium, where a computer program is stored in the computer-readable storage medium, and when the computer program is executed, the method performed by a network device in the second aspect is implemented.

Description of drawings

1 is a schematic diagram of a network architecture provided by an embodiment of the present application;

FIG. 2 is a flowchart of a communication method provided by an embodiment of the present application;

3 is a schematic diagram of filtering of different PRGs provided by an embodiment of the present application;

FIG. 4 is a schematic structural diagram of an apparatus provided by an embodiment of the present application;

FIG. 5 is another schematic structural diagram of an apparatus provided by an embodiment of the present application.

Detailed ways

FIG. 1 shows an example diagram of a communication system 100 to which the embodiments of the present application can be applied. The communication system 100 may include at least one network device 110 . The network device 110 may be a device that communicates with terminal devices, such as a base station or a base station controller. Each network device 110 may provide communication coverage for a particular geographic area and may communicate with terminal devices located within that coverage area (cell). The network device 110 may be an access network device, and the access network device may also be referred to as a radio access network (radio access network, RAN) device, which is a device that provides a wireless communication function for terminal devices. Access network equipment, for example, includes but is not limited to: next generation node B (gNB) in 5G, evolved node B (evolved node B, eNB), radio network controller (radio network controller, RNC), node B (node B, NB), base station controller (BSC), base transceiver station (base transceiver station, BTS), home base station (for example, home evolved nodeB, or home node B, HNB), baseband unit (base band unit, BBU), transmitting and receiving point (transmitting and receiving point, TRP), transmitting point (transmitting point, TP), and/or mobile switching center, etc. Alternatively, the access network device may also be a wireless controller, a centralized unit (centralized unit, CU), and/or a distributed unit (distributed unit, DU) in a cloud radio access network (cloud radio access network, CRAN) scenario. Alternatively, the network device may be a relay station, an access point, a vehicle-mounted device, a terminal device, a wearable device, and a network device in a future 5G network or a network device in a future evolved public land mobile network (PLMN), etc. .

In this embodiment of the present application, the apparatus for implementing the function of the network device may be a network device; it may also be an apparatus capable of supporting the network device to implement the function, such as a chip system, and the apparatus may be installed in the network device. In the technical solutions provided by the embodiments of the present application, the technical solutions provided by the embodiments of the present application are described by taking the device for realizing the function of the network device being a network device as an example.

The communication system 100 also includes one or more terminal devices 120 located within the coverage of the network device 110 . The terminal device 120 may be mobile or stationary. The terminal device 120 may be referred to as a terminal for short, and is a device with a wireless transceiver function. Terminal equipment can be deployed on land, including indoor or outdoor, handheld or vehicle; 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 device can be a mobile phone (mobile phone), a tablet computer (pad), a computer with wireless transceiver function, a virtual reality (virtual reality, VR) terminal device, an augmented reality (augmented reality, AR) terminal device, industrial control ( Wireless terminal equipment in industrial control, wireless terminal equipment in self driving, wireless terminal equipment in remote medical, wireless terminal equipment in smart grid, transportation security (transportation) wireless terminal equipment in safety), wireless terminal equipment in a smart city, and/or wireless terminal equipment in a smart home. The terminal device may also 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 wireless communication Functional handheld devices or computing devices, in-vehicle devices, wearable devices, terminal devices in the future fifth generation (the 5th generation, 5G) network or future evolution of the public land mobile network (PLMN) in the terminal equipment terminal equipment, etc. The terminal device may also be sometimes referred to as user equipment (UE), and the terminal device 120 may communicate with multiple access network devices of different technologies. The access network equipment can communicate with the access network equipment supporting 5G, and it can also be connected with the access network equipment supporting LTE and the access network equipment supporting 5G. The embodiments of the present application are not limited.

In this embodiment of the present application, the apparatus for implementing the function of the terminal device may be a terminal device; it may also be an apparatus capable of supporting the terminal device to implement the function, such as a chip system, and the apparatus may be installed in the terminal device. In this embodiment of the present application, the chip system may be composed of chips, or may include chips and other discrete devices. In the technical solutions provided by the embodiments of the present application, the technical solutions provided by the embodiments of the present application are described by taking the device for realizing the functions of the terminal device as the terminal device as an example.

The network device 110 and the terminal device 120 may perform data transmission through air interface resources. The air interface resources may include at least one of time domain resources, frequency domain resources, code domain resources and space resources. Specifically, when the network device 110 and the terminal device 120 perform data transmission, the network device 110 may send control information to the terminal device 120 through a control channel, such as a physical downlink control channel (PDCCH), so as to provide the terminal device 120 with control information. Allocate transmission parameters of data channels, such as allocating resources of physical downlink shared channel (PDSCH) or physical uplink shared channel (PUSCH). For example, the control information may indicate a time-domain symbol and/or a frequency-domain resource block (RB) to which the data channel is mapped, and the network device 110 and the terminal device 120 use the data channel on the allocated time-frequency resource. data transmission. The above-mentioned data transmission may include downlink data transmission and/or uplink data transmission, the transmission of downlink data (such as data carried by PDSCH) may refer to the transmission of data by the network device 110 to the terminal device 120, and the transmission of uplink data (such as data carried by PUSCH) may refer to the transmission of terminal data. Device 120 sends data to network device 110 . The data can be generalized data, such as user data, system messages, broadcast information, or other information.

Figure 1 illustrates a network device and two terminal devices. Optionally, the communication system 100 may include multiple network devices, and the coverage of one network device may include other numbers of terminal devices, which are not limited by the comparison of the embodiments of the present application.

In the description of this application, unless otherwise stated, "/" indicates that the object associated with it is an "or" relationship, for example, A/B can indicate A or B; "and/or" in this application is only It is an association relationship that describes an associated object, indicating that there can be three kinds of relationships, for example, A and/or B, which can be expressed as: A alone exists, A and B exist at the same time, and B exists alone, among which A, B Can be singular or plural. Also, in the description of the present application, unless stated otherwise, "plurality" means two or more than two. "At least one item(s) below" or similar expressions thereof refer to any combination of these items, including any combination of single item(s) or plural items(s). For example, at least one (a) of a, b, or c can represent: a, b, c, a-b, a-c, b-c, or a-b-c, where a, b, c may be single or multiple . In addition, in order to clearly describe the technical solutions of the embodiments of the present application, in the embodiments of the present application, words such as "first" and "second" are used to distinguish the same or similar items with basically the same function and effect. Those skilled in the art can understand that the words "first", "second" and the like do not limit the quantity and execution order, and the words "first", "second" and the like are not necessarily different.

In addition, the network architecture and service scenarios described in the embodiments of the present application are for the purpose of illustrating the technical solutions of the embodiments of the present application more clearly, and do not constitute limitations on the technical solutions provided by the embodiments of the present application. With the evolution of the network architecture and the emergence of new service scenarios, the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems.

In the network architecture of FIG. 1 described above, there is a concept of potential paired terminal devices. A potential paired terminal device refers to a terminal device with the same time slot (slot) scheduled by the current terminal device, the same physical resource block (PRB) in whole or in part, and a different port (port). The number of potential paired terminal devices corresponding to each terminal device may be one or more, which is not limited. This leads to the concept of service port and interference port.

According to the above description, each terminal device has different scheduling ports from its corresponding potential paired terminal device. For example, UE1's potential paired UEs include UE2, UE3, and UE4. The ports scheduled by UE1 are port 0 and port 1, the ports scheduled by UE2 are port 2 and port 3, the ports scheduled by UE3 are port 4 and port 5, and the ports scheduled by UE4 are port 4 and port 5. The ports are port 6 and port 7. Then the service ports of UE1 are port 0 and port 1, and the interference ports of UE1 are port 2 to port 7. It should be noted that the ports in the embodiments of the present application may also be called antenna ports, and there is no direct relationship between the antenna ports and the physical antennas. In one understanding, an antenna port can be thought of as a logical transmit channel defined by a reference signal. Usually, there are several kinds of logical channels, which correspond to several kinds of antenna ports. For example, if there is one cell reference signal (CRS), it corresponds to one antenna port, two types of CRS correspond to two antenna ports, four types of CRS correspond to four antenna ports, and so on. For the interference information of the interference port, there are usually the following two schemes:

Scheme 1: For an ordinary single user (SU) receiver, the interference of the interference port is treated as a part of the noise floor, that is, the interference port channel is not estimated, and the interference rejection combining ((interference rejection combining, IRC) ) module for processing.

In the above scheme, the SU receiver takes the interference of the interfering port as white noise and performs whitening processing after averaging in the resource block (RB). In the frequency domain fading channel and the channel with strong spatial correlation, its Performance is relatively poor.

Scheme 2: In the multi-user multiple-input multiple-output (MU-MIMO) scenario, the MU receiver estimates the existence of the interference port and the interference information of the interference port, and performs MU on the interference information and useful information. Joint detection has a greater performance improvement than SU receivers. There are mainly the following problems:

1. High complexity: The MU receiver needs to estimate the interference information of the interference port.

2. There is a loss in performance compared to the ideal joint detection: there is an error in the parameter estimation of the interference port, and there is a gap between the ideal interference port information.

Based on the above, the embodiments of the present application provide a communication method and apparatus, including: a network device sends indication parameter information of an interference port to a terminal device, the terminal device performs MU joint detection based on the information of the interference port indicated by the network device, and the terminal device uses Less complexity achieves better reception performance in MU-MIMO scenarios.

As shown in Figure 2, a communication method is provided, including:

Step 201: The network device selects the first interference port from the interference ports of the first terminal device. The above-mentioned step 201 is optional, and the main reasons are as follows: In one solution, the network device may notify the terminal device of the interference information corresponding to all interference ports of the first terminal device, so that the signaling overhead is relatively large. In order to reduce the signaling overhead, in the above step 201, some of the interference ports may be selected from all the interference ports of the first terminal device, and the interference port information may be notified. The selected partial interference ports are the above-mentioned first interference ports. It can be understood that, the above-mentioned first interference ports may include one or more interference ports. In this embodiment of the present application, the first interference port may be selected in the following manner:

The network device may determine potential paired terminal devices of the first terminal device, and the potential paired terminal devices of the first terminal device include one or more terminal devices. When the potential paired terminal device of the first terminal device includes one terminal device, the service port corresponding to the terminal device can be directly used as the first interference port; and when the potential paired terminal device of the first terminal device includes multiple terminal devices When , the network device can calculate the magnitude of the interference between each potential paired terminal device and the first terminal device; according to the difference in the magnitude of the interference between the multiple potential terminal devices and the first terminal device, determine the terminal device that satisfies the condition; The service port corresponding to the terminal device is the first interference port.

In the first example, the optimal beam serving the first terminal device is n, and the optimal beam serving the potential paired terminal device is m, then the network device can determine the optimal beam n to receive the reference signal from the first terminal device signal The difference between the reference signal receiving power (RSRP) and the RSRP of the signal from the first terminal device in the beam m; the difference is divided by the ratio of the paired resource block group (RBG) to obtain a normalized Beam isolation. Optionally, the first terminal device occupies 18 RBGs, the potential paired terminal device occupies 32 RBGs, and there are 10 overlapping RBGs among the 18 RBGs and the 32 RBGs; the value of the pairing RBGs is 10. Therefore, the paired RBG can be understood as the number of overlapping RBGs between the RBG scheduled by the first terminal device and the RBG scheduled by the potential paired terminal device. According to the method described above, the network device can obtain the normalized beam isolation degree of each potential paired terminal device; wherein, the smaller the normalized beam isolation degree, the greater the interference. The network device may select a number of potential paired terminal devices from the potential paired terminal devices of the first terminal device according to the above normalized beam isolation degree, and the selected potential paired terminal device is the terminal device that meets the condition. For example, a potential paired terminal device with a larger normalized beam isolation may be preferentially selected, or a potential paired terminal device with a normalized beam isolation greater than a first threshold may be selected, or the network device may perform signaling based on pre-allocated interference information For example, the signaling overhead of the interference information pre-allocated by the network device is only 10 bits, and the 10 bits are only used to transmit the information of the 4 interference ports. If the number is 2, then the network device can select 2 potential paired terminal devices from multiple potential paired terminal devices according to the size of the normalized beam isolation; or, the above two conditions can be combined, and the network device can A threshold and signaling overhead of pre-allocated interference information, etc., selection of potential terminal equipment, etc., are not limited. Afterwards, the service port corresponding to the selected potential terminal device is the interference port that needs to be notified of the interference port information, that is, the above-mentioned first interference port.

For example, UE1's paired terminal devices include UE2 and UE3, UE1's service ports are 0 and 1, UE2's service ports are 2 and 3, and UE3's service ports are 4 and 5, and UE1's interference ports are 2 to 5. The network device may calculate the normalized beam isolation degrees of UE2 and UE3 respectively in the above manner, and the value of the normalized beam isolation degree of UE3 is greater than the value of the normalized beam isolation degree of UE2. Since the normalized beam isolation of UE3 takes a larger value, service ports 4 and 5 corresponding to UE3 can be used as interference ports that need to notify interference information. That is, the above-mentioned first interference ports are ports 4 and 5.

In the second example, the network device may determine a precoding matrix indicator (PMI) corresponding to each potential paired terminal device and the PMI of the first terminal device; calculate the PMI of the first terminal device and each potential paired terminal The correlation of the PMI of the device, similar to the above-mentioned embodiment, the correlation of the PMI can also be calculated in a normalized manner, the normalized correlation is small, and the interference is large; according to the correlation between the PMI of the potential paired terminal device and the PMI of UE1 Select several potential paired terminal devices, the selected potential paired terminal device is a terminal device that meets the conditions; the service port of the selected potential paired terminal device is the above-mentioned first port and so on.

Step 202: The network device sends a first message to the first terminal device, where the first message is used to indicate interference information of the first interference port.

Optionally, the interference information of each interference port notified by the network device includes at least one of the following: the interference port index, the interference port modulation order, and the precoding resource block group (PRG) information of the interference port. , the quasi co-location (QCL) relationship of the interference ports, the starting position and length of the time domain symbols of the physical downlink shared channel (PDSCH) of the interference ports, and the frequency domain scheduling pattern. Among them, the network device can notify the QCL relationship through high-level signaling, and the high-level signaling can be radio resource control layer (radio resource control, RRC) signaling or media access control layer control element (media access control control element, MAC CE), etc. , combined with down control information (DCI) to notify the interference port index, the modulation order of the interference port, the PRG information of the interference port, the time domain symbol start position and length of the interference port PDSCH, and the frequency domain scheduling pattern.

Step 203: The first terminal device performs joint detection of multi-user MUs according to the interference information of the first interference port.

In one understanding, the above-mentioned joint detection of multi-user MUs may refer to detecting the MU interference information, that is, the interference information of the interference port and the service port information together, or using the interference information as the information of the first terminal device and the first terminal device. The information of the terminal equipment is subjected to the same demodulation processing and the like.

Through the above method, the network device notifies the terminal device of the interference information of the interference port, and the terminal device does not need to estimate the interference information of the interference port by itself, which reduces the complexity of the terminal device. At the same time, since the function of the network device is usually stronger than that of the terminal device, the performance and accuracy of the interference information of the interference port estimated by the network device are usually higher than the interference information of the interference port estimated by the terminal device, which improves the MU The performance of joint detection.

In a possible implementation solution, before step 201, the method may further include: the first terminal device sends a second message to the network device, where the second message is used to indicate whether the terminal device supports MU joint detection. Optionally, the above-mentioned second message may further indicate that the first terminal device supports low-level MU joint detection, or supports high-level MU joint detection. For example, low-level MU joint detection can be represented by binary bit 0, high-level MU joint detection can be represented by binary bit 1, and so on. The low-level MU joint detection may be RE-level whitening, and the high-level MU joint detection may refer to ML joint detection. Optionally, if the first terminal device supports low-level MU joint detection, the network device only needs to indicate the index of the interference port to the first terminal device. If the first terminal device supports high-level MU joint detection, the network device may simultaneously indicate to the first terminal device the index of the interference port, the modulation order of the interference port, and the like. Optionally, in addition to reporting to the network device whether it supports MU joint detection, the first terminal device can also report to the network device whether it needs the modulation order of the interference port and the QCL source tracking capability.

Optionally, after the above step 203, the method may further include: the first terminal device measures the interference strength of all the interference ports detected by the first terminal device; when the first terminal device detects that there is interference whose interference strength is greater than the indicated first interference port When the strength of the second interference port is exceeded, the first feedback information is sent to the network device. The network device can determine, according to the first feedback information, whether to add the interference indication information of the second interference port in the subsequent transmission time interval (transmission time interval, TTI), or whether to replace the interference indication information of the first interference port with the following TTI. The interference indication information of the second interference port, etc. Alternatively, when the first terminal device detects that the interference strength of the first interference port is less than the first threshold, it sends second feedback information to the network device, and the network device increases the threshold for selecting the first interference port according to the second feedback information. Alternatively, when the first terminal device detects that the interference strength of the first interference port is greater than the second threshold, it sends third feedback information to the network device. The network device lowers the selection threshold of the first interference port and the like according to the third feedback information.

In this embodiment of the present application, the interference strength of the interference port may be calculated in the following manner: the interference power plus noise power ratio (INR) of each interference port may be calculated as the interference strength of each interference port , or, the correlation between the interference port and the service port can be used to measure the interference strength. For example, the serving port of UE1 is 0, and the interference ports are 2 and 3. The power-normalized correlations for serving port 0 and interfering ports 2 and 3 can be calculated separately. The smaller the correlation, the greater the interference intensity and the greater the interference to the UE1.

In the above manner, the terminal device feedbacks, and the network device dynamically adjusts the selection of the interference port, so that the selection of the interference port is more accurate, and the selection of the interference port can be dynamically updated.

It should be noted that, in this embodiment of the present application, for the QCL relationship notified by the above network device, in addition to the terminal device performing MU joint detection, the first terminal device can also determine the pilot frequency according to the QCL relationship notified by the network device; Frequency calculation of power delay profile (power delay profile, PDP) and Doppler spectrum of the interference port.

In the following description, taking the network device as the base station and the terminal device as the UE as an example, a communication method is provided, and the communication method can be a specific application example of the communication method shown in FIG. 2, including:

1. A link is established between the base station and the UE, and the UE reports to the base station whether it supports MU joint detection. Optionally, the UE may also report to the base station whether it needs the modulation order of the interference port and the QCL source tracking capability.

2. The base station configures the UE's joint detection function to take effect.

3. In the MU scenario, when the demodulation reference signal (DMRS) port allocation ends, the base station performs the following operations on the MU joint detection of the valid user:

1) Select the port that is considered to cause interference to the UE

i. In order to reduce the signaling overhead of DCI, it is necessary to select the interference port that needs to notify the interference signal. For the process of selecting the interference port, please refer to the above description.

ii. In the scheduling bandwidth of the serving UE, if there are multiple interfering UEs on a certain interfering port, and the modulation orders of the interfering UEs are inconsistent, the interfering port may no longer notify the modulation order. In one understanding, the above-mentioned interfering UEs may be UEs for which the network device schedules the same ports but different scheduling RBs.

2) The base station updates the high-level QCL information through high-level signaling, and the QCL information includes the QCL relationship and QCL source information of all potential paired UEs. If the QCL relationship and QCL source information of the potentially paired UE are already included in the high-layer signaling, no further processing is required.

3) Notifying the PRG information of the interference port through DCI, where the PRG information refers to the PRG information of the interference port in the same DMRS code division multiplexing (code division multiplexing, CDM) group. If the PRG of the interfering port is the same as the PRG of the serving port, the indication in the DCI is not required.

4) Indicate the location information of the interference port in the current TTI through the DCI, the modulation order of the interference port (optional, the modulation order of the interference port can be indicated only for the UE that reports the required modulation order), the PRG information of the interference port and the interference Port QCL relationship, etc.

4. After receiving the high-level signaling of the base station, the UE can perform long-term tracking according to the QCL relationship carried in the high-level signaling. According to the TRS/SSB and other pilot signals corresponding to the locally pre-stored interference port, the PDP spectrum and Doppler power spectrum are estimated; when the QCL relationship of the activated interference port is indicated in the DCI, the corresponding pre-calculated and stored PDP spectrum and Doppler power spectrum can be selected. Doppler power spectrum, calculate frequency domain correlation coefficient and time domain correlation coefficient. The frequency domain correlation coefficient and the time-frequency correlation coefficient are used for the Wiener filter channel estimation. Optionally, the capability of tracking multiple QCL sources cannot exceed the capability of the UE itself, that is, the capability of tracking TRS/SSB when multiple TRPs of the UE are multiplexed.

In an understanding, the above process may be specifically: the base station notifies the QCL relationship of multiple interference ports in high-layer signaling. After receiving the high-level signaling, the UE obtains the QCL relationship of multiple interference ports in the high-level signaling; performs long-term tracking on the QCL relationship of each dry port, and obtains the PDP spectrum and Doppler power spectrum of each interference port; the base station An active interferer port may be indicated in the DCI. For example, the high-level signaling may include the QCL relationship of the four interference ports. Through the long-term tracking process, the PDP spectrum and Doppler power spectrum corresponding to the four interference ports can be calculated and stored separately; if the activated interference port indicated in the DCI is Interference port 2, the UE can select the PDP spectrum and Doppler power spectrum corresponding to the interference port 2 from the PDP spectrum and Doppler power spectrum of the above-mentioned 4 pre-stored interference ports; and according to the PDP spectrum corresponding to the interference port 2 and Doppler power spectrum, calculate frequency domain correlation coefficient and time domain correlation coefficient, etc.

5. After receiving the PRG information in the DCI, the UE can set the matching filtering granularity according to different DMRS CDM groups, and then perform different granularity filtering in different DRMS CDM groups. As shown in FIG. 3 , when the PRG is 2RB, filtering may be performed according to the filtering granularity of 2RB, and when the PRG is 4RB, filtering may be performed according to the filtering granularity of 4RB.

6. The UE measures all possible interference ports according to the interference ports and serving ports indicated in the DCI. If it is found that there is stronger interference and there is no indication or the indicated interference port strength is small, feedback can be performed, and the feedback method can include:

1) Feedback method one

The UE measures the interference strength of all possible interference ports; if it is found that the strength of the unindicated interference port is greater than the currently indicated interference port, it will give feedback. The base station determines whether to increase the interference port indication in the current scheduling period. Or if the UE finds that the indicated interference port strength is less than a certain threshold, the UE also feeds back to the base station, and the base station decides whether to replace the interference port in the subsequent TTI or not to indicate the current interference port. Wherein, the uplink feedback timing is consistent with the hybrid automatic repeat request (hybrid automatic repeat request, HARQ) timing.

2) Feedback method 2

The UE measures the interference strength of all possible interference ports; if the UE finds that the strength of the unindicated interference port is greater than the currently indicated interference port, the UE feeds back to the base station to reduce the interference selection threshold. Each time the base station receives the above feedback, it reduces the granularity of the threshold by one. Alternatively, if the UE finds that the indicated interference port strength is less than a certain threshold, the UE feeds back to the base station to increase the interference selection threshold. Each time the base station receives the above feedback, it increases the granularity of the threshold by one. Optionally, the uplink feedback may be less than the HARQ delay.

It should be pointed out that the interference strength of the interference port can be measured by the INR or the correlation measurement of the interference port and the service port. The smaller the correlation between the two, the stronger the interference.

7. The UE performs joint MU detection according to the interference port and modulation order indicated by the DCI.

For example, the UE can estimate the interference strength according to the indicated interference port and modulation order; the UE decides whether to perform joint maximum likelihood (ML) detection or resource element (RE) granularity according to the interference strength albino. For example, if the interference strength is less than a certain threshold, only RE-level whitening can be performed on the interference, and the service port can perform ML joint detection; or, if the interference strength is greater than a certain threshold, the service port and the interference port can perform ML joint detection.

Through the above method, the performance of joint channel estimation under MU-MIMO can be improved, the joint detection performance of MU can be improved, the loss of port estimation and modulation order estimation can be avoided, the loss caused by small granularity PRG filtering and QCL information mismatch can be avoided, and the MU can be improved. - MIMO throughput performance. At the same time, the overhead of UE port estimation and modulation order estimation can be saved, and the ability of multiplexing multiple TRPs to track multiple QCL sources does not increase additional overhead.

As shown in Table 1, in the scenario of 4 transmit and 4 receive (4transmit 4receive, 4T4R), 1 service port and 1 interference port, and the modulation order is 256 and 16 quadrature amplitude modulation (QAM), the current solution The estimated modulation order is 10%, the block error rate (BLER) threshold is 31.9dB, while the notification modulation order of the proposed scheme is 10%, the BLER threshold is 29.7dB, and the performance gain is 2dB. In the scenario of 8T4R, 2 service ports and 2 interference ports, the 1RB filtering of the current solution is 80Mbps, the 4RB filtering of the solution of the present application is 95Mbps, and the performance gain is 18.7%. In the scenario of 4T4R, 1 service port and 1 interference port, the ETU mismatch of the interference port in the current solution is 36 Mbps for the EPA, and the mismatch of the interference port in the proposed solution is 44 Mbps, and the performance gain is 22.2%.

Table 1

The methods provided by the embodiments of the present application have been described in detail above with reference to FIG. 1 to FIG. 3 . The device provided by the embodiment of the present application will be described in detail below with reference to FIG. 4 and FIG. 5 . It should be understood that the description of the apparatus embodiment corresponds to the description of the method embodiment. Therefore, for the content not described in detail, reference may be made to the descriptions in the above method embodiments.

FIG. 4 is a schematic block diagram of an apparatus 400 according to an embodiment of the present application, which is used to implement the functions of the terminal device in the foregoing method embodiments. The apparatus may be a software unit or a system-on-a-chip. The system-on-chip may consist of chips, or may include chips or other discrete devices. The apparatus includes a communication unit 401 for communicating with the outside. The apparatus may also include a processing unit 402 for processing.

In an example, the foregoing apparatus 400 is configured to implement the steps of the terminal device in the foregoing method embodiments. The apparatus 400 may be a terminal device, or may be a chip or circuit configured in the terminal device.

For example, the communication unit 401 is configured to receive a first message from a network device, where the first message includes interference information of a first interference port in the first terminal device; the processing unit 402 is configured to The interference information of the interference port is used for multi-user MU joint detection.

Optionally, the interference information of the first interference port includes at least one of the following items: the index of the first interference port, the modulation order of the first interference port, the PRG information of the precoding resource block group of the first interference port, the first interference port The quasi-co-sited QCL relationship of the interference port, the starting position and length of the PDSCH time-domain symbol of the physical downlink shared channel of the first interference port, and the frequency-domain scheduling pattern.

Optionally, receiving the first message from the network device includes: receiving high-level signaling from the network device, where the high-level signaling includes the QCL relationship of the first interference port; receiving downlink control information DCI from the network device , the DCI includes the index of the first interference port, the modulation order of the first interference port, the PRG information of the first interference port, the starting position and length of the time-frequency symbol of the PDSCH of the first interference port, and the frequency domain scheduling pattern.

Optionally, the communication unit 401 is further configured to send a second message to the network device, where the second message is used to indicate whether the first terminal device supports the capability of MU joint detection.

Optionally, the processing unit 402 is further configured to measure the interference strengths of all the interference ports detected by the processing unit 402; the communication unit 401 is further configured to: when detecting that there is a second interference whose interference strength is greater than the interference strength of the first interference port When it is detected that the interference strength of the first interference port is less than the first threshold, the second feedback information is sent to the network device; or, when it is detected that the first feedback information is When the interference strength of the interference port is less than the second threshold, the third feedback information is sent to the network device.

Optionally, the communication unit 401 is further configured to receive high-level signaling from the network device, and the high-level signaling includes the QCL relationship of multiple interference ports; the processing unit 402 is also used for the QCL relationship for each interference port, Long-term tracking is carried out respectively, and the PDP spectrum and Doppler power spectrum corresponding to each interference port are calculated and pre-stored. The DCI includes the QCL relationship of the activated interference port. In the above-mentioned pre-stored PDP spectrum and Doppler power spectrum, select The PDP spectrum and Doppler power spectrum corresponding to the activated interference port; according to the selected PDP spectrum and Doppler power spectrum, the frequency domain correlation coefficient and the time domain correlation coefficient are calculated, and the frequency domain correlation coefficient and the time-frequency correlation coefficient are calculated. Used for Wiener filter channel estimation. In another example, the foregoing apparatus 400 is configured to implement the steps of the network device in the foregoing method embodiments. The apparatus 400 may be a network device, or may be a chip or circuit configured in the network device.

For example, the processing unit 402 is configured to select the first interference port among the interference ports of the first terminal device; the communication unit 401 is configured to send a first message to the first terminal device, where the first message is used to indicate the first The interference information of the interference port, the interference information of the first interference port is used for the first terminal device to perform joint detection of the multi-user MU.

Optionally, the interference information of the first port includes at least one of the following: an index of the first interference port, a modulation order of the first interference port, PRG information of the precoding resource block group of the first interference port, the first interference port The quasi-co-sited QCL relationship, the starting position and length of the time domain symbol of the physical downlink shared channel PDSCH of the first interference port, and the frequency domain scheduling pattern.

Optionally, sending the first message to the first terminal device includes: sending high-layer signaling to the first terminal device, where the high-layer signaling includes the QCL relationship of the first interference port; The terminal device sends downlink control information DCI, where the DCI includes the index of the first interference port, the modulation order of the first interference port, the PRG information of the precoding resource block group of the first interference port, and the time domain symbol start of the PDSCH of the first interference port. start position and length, and frequency domain scheduling pattern.

Optionally, among the interference ports of the first terminal device, determining the first interference port includes: determining a potential paired terminal device of the first terminal device, where the potential paired terminal device refers to a connection with the first terminal device. For terminal devices with the same scheduling time slot, the same physical resource block PRB in whole or in part, and different ports, the potential paired terminal device includes at least one terminal device; when the potential paired terminal device of the first terminal device includes multiple terminal devices When a terminal device is used, calculate the magnitude of the interference between each potential paired terminal device and the first terminal device; according to the difference in the magnitude of the interference between different potential paired terminal devices and the first terminal device, determine the potential paired terminal that satisfies the condition equipment; the service port corresponding to the potentially paired terminal equipment that meets the condition is the first interference port.

Optionally, the communication unit 401 is further configured to: receive a second message from the first terminal device, where the second message is used to indicate whether the terminal device supports MU joint detection.

Optionally, the communication unit 401 is further configured to: receive first feedback information from the first terminal device, where the first feedback information is that the first terminal device detects that there is interference with a strength greater than the first interference the second interference port of the interference strength of the port; the processing unit 402 is further configured to: determine, according to the first feedback information, whether to increase the interference information indication of the second interference port in the subsequent transmission time interval TTI, or whether to add the interference information indication of the second interference port The interference information indication of the first interference port is replaced with the interference information indication of the second interference port. or,

The communication unit 401 is further configured to: receive second feedback information from the first terminal device, where the second feedback information is used to indicate that the first terminal device detects that the interference strength of the first interference port is less than The first threshold. The processing unit 402 is further configured to: increase the threshold for selecting the first interference port according to the second feedback information. or,

The communication unit 401 is further configured to: receive third feedback information from the first terminal device, where the third feedback information is used to indicate that the first terminal device detects that the interference strength of the first interference port is greater than The second threshold. The processing unit 402 is further configured to: reduce the selection threshold of the first interference port according to the third feedback information.

It can be understood that, the function of the communication unit in the above embodiments may be implemented by a transceiver, and the function of the processing unit may be implemented by a processor. The transceiver may include a transmitter and/or a receiver, etc., for respectively implementing the functions of the transmitting unit and/or the receiving unit. The following description is given with reference to FIG. 5 as an example.

The communication apparatus 500 shown in FIG. 5 includes at least one processor 501 . Communication apparatus 500 may also include at least one memory 502 for storing program instructions and/or data. Memory 502 is coupled to processor 501 . The coupling in the embodiments of the present application is an indirect coupling or communication connection between devices, units or modules, which may be in electrical, mechanical or other forms, and is used for information exchange between devices, units or modules. The processor 501 may cooperate with the memory 502 , the processor 501 may execute program instructions stored in the memory 502 , and at least one of the at least one memory 502 may be included in the processor 501 .

The apparatus 500 may also include a communication interface 503 for communicating with other devices through a transmission medium, so that the communication apparatus 500 may communicate with other devices. In this embodiment of the present application, the communication interface may be a transceiver, a circuit, a bus, a module, or other types of communication interfaces. In this embodiment of the present application, when the communication interface is a transceiver, the transceiver may include an independent receiver and an independent transmitter; it may also be a transceiver integrating a transceiver function, or an interface circuit.

It should be understood that a connection medium between the processor 501 , the memory 502 , and the communication interface 503 is not limited in the embodiments of the present application. In the embodiment of the present application, the memory 502, the processor 501, and the communication interface 503 are connected through a communication bus 504 in FIG. 5. The bus is represented by a thick line in FIG. 5. The connection mode between other components is only a schematic illustration. , not as a limitation. The bus may include an address bus, a data bus, a control bus, and the like. For convenience of presentation, only one thick line is used in FIG. 5, but it does not mean that there is only one bus or one type of bus.

In an example, the apparatus 500 is configured to implement the steps performed by the terminal device in the foregoing method embodiment. The communication interface 503 is configured to perform the transceiving related operations on the terminal device side in the above embodiments, and the processor 501 is configured to perform the processing related operations on the terminal device side in the above method embodiments.

For example, the communication interface 503 is configured to receive a first message from the network device, where the first message includes the interference information of the first interference port in the first terminal device; the processor 501 is configured to The interference information of the interference port is used for multi-user MU joint detection.

Optionally, the communication interface 503 is further configured to send a second message to the network device, where the second message is used to indicate whether the first terminal device supports the capability of MU joint detection.

Optionally, the processor 501 is further configured to measure the interference strength of all the interference ports detected by the processor 501; the communication interface 503 is further configured to: when detecting that there is a second interference whose interference strength is greater than the interference strength of the first interference port When it is detected that the interference strength of the first interference port is less than the first threshold, the second feedback information is sent to the network device; or, when it is detected that the first feedback information is When the interference strength of the interference port is less than the second threshold, the third feedback information is sent to the network device.

Optionally, the communication interface 503 is also used to receive high-level signaling from the network device, where the high-level signaling includes the QCL relationship of multiple interference ports; the processor 501 is also used for the QCL relationship for each interference port, Long-term tracking is carried out respectively, and the PDP spectrum and Doppler power spectrum corresponding to each interference port are calculated and pre-stored. The DCI includes the QCL relationship of the activated interference port. In the above-mentioned pre-stored PDP spectrum and Doppler power spectrum, select The PDP spectrum and Doppler power spectrum corresponding to the activated interference port; according to the selected PDP spectrum and Doppler power spectrum, the frequency domain correlation coefficient and the time domain correlation coefficient are calculated, and the frequency domain correlation coefficient and the time-frequency correlation coefficient are calculated. Used for Wiener filter channel estimation.

In another example, the foregoing apparatus 500 is configured to implement the steps of the network device in the foregoing method embodiments. The apparatus 500 may be a network device, or may be a chip or circuit configured in the network device.

For example, the processor 501 is configured to select the first interference port among the interference ports of the first terminal device; the communication interface 503 is configured to send a first message to the first terminal device, where the first message is used to indicate the first The interference information of the interference port, the interference information of the first interference port is used for the first terminal device to perform joint detection of the multi-user MU.

Optionally, among the interference ports of the first terminal device, determining the first interference port includes: determining a potential paired terminal device of the first terminal device, where the potential paired terminal device refers to a connection with the first terminal device. For terminal devices with the same scheduling time slot, the same physical resource block PRB in whole or in part, and different ports, the potential paired terminal device includes at least one terminal device; when the potential paired terminal device of the first terminal device includes multiple terminal devices When a terminal device is used, calculate the magnitude of the interference between each potential paired terminal device and the first terminal device; according to the difference in the magnitude of the interference between different potential paired terminal devices and the first terminal device, determine the potential paired terminal that meets the conditions equipment; the service port corresponding to the potentially paired terminal equipment that meets the condition is the first interference port.

Optionally, the communication interface 503 is further configured to: receive a second message from the first terminal device, where the second message is used to indicate whether the terminal device supports MU joint detection.

Optionally, the communication interface 503 is further configured to: receive first feedback information from the first terminal device, where the first feedback information is that the first terminal device detects that there is interference with a strength greater than the first interference the second interference port of the interference strength of the port; the processor 501 is further configured to: determine, according to the first feedback information, whether to increase the interference information indication of the second interference port in the subsequent transmission time interval TTI, or whether to add the interference information indication of the second interference port The interference information indication of the first interference port is replaced with the interference information indication of the second interference port. or,

The communication interface 503 is further configured to: receive second feedback information from the first terminal device, where the second feedback information is used to indicate that the first terminal device side detects that the interference strength of the first interference port is less than a first threshold. The processor 501 is further configured to: increase the threshold for selecting the first interference port according to the second feedback information. or,

The communication interface 503 is further configured to: receive third feedback information from the first terminal device, where the third feedback information is used to indicate that the first terminal device detects that the interference strength of the first interference port is greater than The second threshold. The processor 501 is further configured to: reduce the selection threshold of the first interference port according to the third feedback information.

An embodiment of the present application further provides an apparatus, where the apparatus is configured to execute the method in the above method embodiment.

The embodiments of the present application further provide a computer-readable storage medium, including a program, and when the program is executed by a processor, the methods in the above method embodiments are executed.

Embodiments of the present application further provide a computer program product, where the computer program product includes computer program code, and when the computer program code is run on a computer, enables the computer to implement the method in the above method embodiments.

An embodiment of the present application further provides a chip, including: a processor, where the processor is coupled to a memory, the memory is used to store a program or an instruction, and when the program or instruction is executed by the processor, the device causes the device to execute The methods in the above method examples.

In this embodiment of the present application, the processor may be a general-purpose processor, a digital signal processor, an application-specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, or a discrete hardware component, which may be implemented or executed The methods, steps, and logical block diagrams disclosed in the embodiments of the present application. A general purpose processor may be a microprocessor or any conventional processor or the like. The steps of the methods disclosed in conjunction with the embodiments of the present application may be directly embodied as executed by a hardware processor, or executed by a combination of hardware and software modules in the processor.

In this embodiment of the present application, the memory may be a non-volatile memory, such as a hard disk drive (HDD) or a solid-state drive (SSD), etc., or may also be a volatile memory (volatile memory), for example Random-access memory (RAM). Memory is, but is not limited to, 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 in this embodiment of the present application may also be a circuit or any other device capable of implementing a storage function, for storing program instructions and/or data.

The methods provided in the embodiments of the present application may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented in software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of the present invention are generated. The computer may be a general purpose computer, a special purpose computer, a computer network, network equipment, user equipment, or other programmable apparatus. The computer instructions may be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be downloaded from a website site, computer, server, or data center Transmission to another website site, computer, server or data center by wire (eg coaxial cable, optical fiber, digital subscriber line, DSL for short) or wireless (eg infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available media that can be accessed by a computer or a data storage device such as a server, data center, etc. that includes one or more available media integrated. The usable media may be magnetic media (eg, floppy disks, hard disks, magnetic tapes), optical media (eg, digital video discs (DVD)), or semiconductor media (eg, SSDs), and the like.

Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

A communication method, comprising:

The first terminal device receives a first message from the network device, where the first message includes interference information of the first interference port in the first terminal device;

The first terminal device performs joint multi-user MU detection according to the interference information of the first interference port.
The method of claim 1, wherein the interference information of the first interference port includes at least one of the following:

The index of the first interference port, the modulation order of the first interference port, the PRG information of the precoding resource block group of the first interference port, the quasi-co-site QCL relationship of the first interference port, and the time domain of the physical downlink shared channel PDSCH of the first interference port Symbol start position and length, and frequency-domain modulation pattern.
The method according to claim 1 or 2, wherein the first terminal device receives the first message from the network device, comprising:

The first terminal device receives high-layer signaling from a network device, and the high-level signaling includes the QCL relationship of the first interference port;

The first terminal device receives the downlink control information DCI from the network device, and the DCI includes the first interference port index, the first interference port modulation order, the PRG information of the first interference port, and the time of the first interference port PDSCH. Frequency symbol start position and length, and frequency domain modulation pattern.
The method of any one of claims 1 to 3, further comprising:

The first terminal device sends a second message to the network device, where the second message is used to indicate whether the first terminal device supports the capability of MU joint detection.
The method of any one of claims 1 to 4, further comprising:

The first terminal device measures the interference strength of all interference ports detected by the first terminal device;

When the first terminal device detects that there is a second interference port whose interference strength is greater than the interference strength of the first interference port, it sends first feedback information to the network device; or,

When the first terminal device detects that the interference strength of the first interference port is less than the first threshold, it sends second feedback information to the network device; or,

When the first terminal device detects that the interference strength of the first interference port is less than the second threshold, it sends third feedback information to the network device.
A communication method, comprising:

The network device selects the first interference port among the interference ports of the first terminal device;

The network device sends a first message to the first terminal device, where the first message is used to indicate interference information of the first interference port, and the interference information of the first interference port is used for the first terminal device to perform multi-user MU joint detection.
The method of claim 6, wherein the interference information of the first port includes at least one of the following:

The index of the first interference port, the modulation order of the first interference port, the PRG information of the precoding resource block group of the first interference port, the quasi-co-sited QCL relationship of the first interference port, and the time domain symbol of the physical downlink shared channel PDSCH of the first interference port Start position and length, and frequency domain scheduling pattern.
The method according to claim 6 or 7, wherein the network device sends the first message to the first terminal device, comprising:

sending, by the network device, high-level signaling to the first terminal device, where the high-level signaling includes the QCL relationship of the first interference port;

The network device sends downlink control information DCI to the first terminal device, and the DCI includes the first interference port index, the first interference port modulation order, the precoding resource block group PRG information of the first interference port, and the first interference port. The starting position and length of the time domain symbol of an interference port PDSCH, and the frequency domain scheduling pattern.
The method according to any one of claims 6 to 8, wherein the network device determines the first interference port among the interference ports of the first terminal device, comprising:

The network device determines a potential paired terminal device of the first terminal device, and the potential paired terminal device refers to a terminal device with the same scheduling time slot as the first terminal device, the same physical resource block PRB in whole or in part, and a different port. terminal equipment, the potential paired terminal equipment includes at least one terminal equipment;

When the potential paired terminal devices of the first terminal device include multiple terminal devices, calculate the magnitude of the interference between each potential paired terminal device and the first terminal device;

Determine a potential paired terminal device that satisfies the condition according to the difference in the magnitude of the interference between different potential paired terminal devices and the first terminal device;

The service port corresponding to the potentially paired terminal device that meets the condition is the first interference port.
The method of any one of claims 6 to 9, further comprising:

The network device receives a second message from the first terminal device, where the second message is used to indicate whether the terminal device supports MU joint detection.
The method of any one of claims 6 to 10, further comprising:

The network device receives first feedback information from the first terminal device, where the first feedback information is that the first terminal device detects that there is second interference with an interference strength greater than that of the first interference port port;

The network device determines, according to the first feedback information, whether to add the interference information indication of the second interference port within the subsequent transmission time interval TTI, or whether to replace the interference information indication of the first interference port with the second interference information indication Interference information indication of the interfering port.
The method of any one of claims 6 to 10, further comprising:

receiving, by the network device, second feedback information from the first terminal device, where the second feedback information is used to indicate that the first terminal device side detects that the interference strength of the first interference port is less than a first threshold;

The network device increases the threshold for selecting the first interference port according to the second feedback information.
The method of any one of claims 6 to 10, further comprising:

receiving, by the network device, third feedback information from the first terminal device, where the third feedback information is used to indicate that the first terminal device side detects that the interference strength of the first interference port is greater than a second threshold;

The network device lowers the selection threshold of the first interference port according to the third feedback information.
A communication device, comprising:

a communication unit, configured to receive a first message from a network device, where the first message includes interference information of a first interference port in the first terminal device;

The processing unit is configured to perform joint detection of multi-user MU according to the interference information of the first interference port.
The apparatus of claim 14, wherein the interference information of the first interference port includes at least one of the following:

The index of the first interference port, the modulation order of the first interference port, the PRG information of the precoding resource block group of the first interference port, the quasi-co-site QCL relationship of the first interference port, and the time domain of the physical downlink shared channel PDSCH of the first interference port Symbol start position and length, and frequency-domain scheduling pattern.
The apparatus according to claim 14 or 15, wherein the receiving the first message from the network device comprises:

Receive high-level signaling from a network device, where the high-level signaling includes the QCL relationship of the first interference port;

Receive downlink control information DCI from the network device, where the DCI includes the index of the first interference port, the modulation order of the first interference port, the PRG information of the first interference port, and the start position of the time-frequency symbol of the PDSCH of the first interference port and length, and frequency domain scheduling pattern.
The device of any one of claims 14 to 16, wherein

The communication unit is further configured to send a second message to the network device, where the second message is used to indicate whether the first terminal device supports the capability of MU joint detection.
The device of any one of claims 14 to 17, wherein:

The processing unit is also used to measure the interference strength of all the interference ports detected by it;

The communication unit is further configured to send first feedback information to the network device when it is detected that there is a second interference port whose interference strength is greater than the interference strength of the first interference port; or, when the interference of the first interference port is detected When the strength is less than the first threshold, the second feedback information is sent to the network device; or, when it is detected that the interference strength of the first interference port is less than the second threshold, the third feedback information is sent to the network device.
A communication device, comprising:

a processing unit, configured to select the first interference port among the interference ports of the first terminal device;

A communication unit, configured to send a first message to a first terminal device, where the first message is used to indicate interference information of a first interference port, and the interference information of the first interference port is used for the first terminal device to perform multiple User MU joint detection.
The apparatus of claim 19, wherein the interference information of the first port includes at least one of the following:

The index of the first interference port, the modulation order of the first interference port, the PRG information of the precoding resource block group of the first interference port, the quasi-co-sited QCL relationship of the first interference port, and the time domain symbol of the physical downlink shared channel PDSCH of the first interference port Start position and length, and frequency domain scheduling pattern.
The apparatus according to claim 19 or 20, wherein the sending the first message to the first terminal device comprises:

sending high-level signaling to the first terminal device, where the high-level signaling includes the QCL relationship of the first interference port;

Send downlink control information DCI to the first terminal device, where the DCI includes the first interference port index, the first interference port modulation order, the precoding resource block group PRG information of the first interference port, and the first interference port PDSCH The starting position and length of the time-domain symbols, and the frequency-domain scheduling pattern.
The apparatus according to any one of claims 19 to 21, wherein, in the interference port of the first terminal device, determining the first interference port comprises:

Determine the potential paired terminal equipment of the first terminal equipment, the potential paired terminal equipment refers to the terminal equipment with the same scheduling time slot as the first terminal equipment, all or part of the same physical resource block PRB, and different ports, so The potential paired terminal device includes at least one terminal device;

When the potential paired terminal devices of the first terminal device include multiple terminal devices, calculate the magnitude of the interference between each potential paired terminal device and the first terminal device;

Determine a potential paired terminal device that satisfies the condition according to the difference in the magnitude of the interference between different potential paired terminal devices and the first terminal device;

The service port corresponding to the potentially paired terminal device that meets the condition is the first interference port.
The device of any one of claims 19 to 22, wherein:

The communication unit is further configured to receive a second message from the first terminal device, where the second message is used to indicate whether the terminal device supports MU joint detection.
The device of any one of claims 19 to 23, wherein:

The communication unit is further configured to receive first feedback information from the first terminal device, where the first feedback information is that the first terminal device detects that an interference intensity greater than that of the first interference port exists the second interference port;

The processing unit is further configured to determine, according to the first feedback information, whether to add the interference information indication of the second interference port within the subsequent transmission time interval TTI, or whether to replace the interference information indication of the first interference port with The interference information indication of the second interference port.
The device of any one of claims 19 to 23, wherein:

The communication unit is further configured to receive second feedback information from the first terminal device, where the second feedback information is used to indicate that the first terminal device side detects that the interference strength of the first interference port is less than first threshold;

The processing unit is further configured to increase the threshold for selecting the first interference port according to the second feedback information.
The device of any one of claims 19 to 23, wherein:

The communication unit is further configured to receive third feedback information from the first terminal device, where the third feedback information is used to indicate that the first terminal device side detects that the interference strength of the first interference port is greater than second threshold;

The processing unit is further configured to lower the selection threshold of the first interference port according to the third feedback information.
A communication device, characterized by comprising a processor, which is coupled to at least one memory, and the processor is configured to read a computer program stored in the at least one memory, so as to execute the program as claimed in claims 1 to 5 any one of the methods, or to perform the methods of any one of claims 6 to 13.
A computer-readable storage medium, characterized by comprising a program, when the program is executed by a processor, the method according to any one of claims 1 to 5 is executed, or the method according to any one of claims 6 to 13 is executed. The method of any one is performed.