A signal transmission method and related apparatus

Abstract

This application discloses a signal transmission method and related apparatus. In this method, first indication information is used to indicate one or more demodulation reference signal (DMRS) port sets, and second indication information is used to indicate N first DMRS ports associated with a first signal; N is greater than or equal to 1. A terminal device receives the first indication information, the second indication information, and the first signal from a network device, and processes the first signal according to the first and second indication information, thereby suppressing interference signals. Furthermore, the first indication information received by the terminal device informs the terminal device of the DMRS ports with strong interference by indicating one or more DMRS port sets, rather than indicating each strong interference DMRS port separately. Therefore, this method helps reduce the signaling overhead required to notify the terminal device of the DMRS ports with strong interference.

Description

Technical Field

[0001] This application relates to the field of communication technology, and in particular to a signal transmission method and related apparatus. Background Technology

[0002] Currently, in some communication scenarios, terminal devices may experience interference from other signals when receiving downlink signals from network devices. For example, when a base station transmits different signals to multiple terminal devices on the same time-frequency resource, all other signals are interference signals for one of the signals. Another example is when one terminal device is receiving a downlink signal while another is transmitting an uplink signal; the uplink signal can be considered interference to the downlink signal. These two terminal devices may be located in the same cell or adjacent cells. To suppress the impact of interference signals on useful signals, terminal devices need to obtain the Demodulation Reference Signal (DMRS) port of strong interference. Once the terminal device knows the DMRS port of strong interference, it can demodulate the signal from the network device, thus suppressing the interference signal.

[0003] Therefore, how network devices can inform terminal devices of the strong interference of DMRS ports is a problem that urgently needs to be solved. Summary of the Invention

[0004] This application provides a signal transmission method and related apparatus, which is beneficial for informing terminal devices of DMRS ports with strong interference.

[0005] In a first aspect, this application provides a signal transmission method. In this method, a terminal device receives first indication information and second indication information from a network device, receives a first signal from the network device, and then processes the first signal according to the first indication information and the second indication information. The first indication information is used to indicate one or more demodulation reference signal (DMRS) port sets, and the second indication information is used to indicate N first DMRS ports associated with the first signal; N is greater than or equal to 1.

[0006] As can be seen, the terminal device can process the first signal from the network device according to the first and second indication information to suppress the interference signal. Furthermore, the first indication information received by the terminal device informs the terminal device of the DMRS ports with strong interference by providing a set of one or more DMRS ports, rather than indicating each DMRS port with strong interference separately. Therefore, this method helps reduce the signaling overhead required to notify the terminal device of the DMRS ports with strong interference.

[0007] In one implementation, the signals associated with each DMRS port in each DMRS port set are strongly correlated; or, the signals associated with each DMRS port in each DMRS port set are strong interference signals. Therefore, the terminal device can determine the strongly interfering DMRS port based on the DMRS port set including the first DMRS port, which facilitates the terminal device in demodulating the first signal from the network device based on the strongly interfering DMRS port, thereby suppressing the interference signal.

[0008] In another implementation, the signals associated with each DMRS port in each DMRS port set are weakly correlated; or, the signals associated with each DMRS port in each DMRS port set do not interfere with each other. Therefore, the terminal device can determine the strongly interfering DMRS ports based on the DMRS port set excluding the first DMRS port, which facilitates the terminal device in demodulating the first signal from the network device based on the strongly interfering DMRS ports, thereby suppressing the interference signals.

[0009] In one embodiment, the terminal device processes the first signal according to the first indication information, including: determining one or more second DMRS ports according to the first indication information and the second indication information; and demodulating the first signal according to the DMRS corresponding to the N first DMRS ports and the DMRS corresponding to the one or more second DMRS ports. Wherein, the one or more second DMRS ports and the N first DMRS ports belong to the same DMRS port set.

[0010] It is evident that when the signals associated with each DMRS port in each DMRS port set are strongly correlated, or when the signals associated with each DMRS port in each DMRS port set are strong interference signals, the terminal device determines one or more second DMRS ports from the DMRS port sets containing N first DMRS ports.

[0011] In another embodiment, the terminal device processes the first signal according to the first indication information, including: determining one or more second DMRS ports according to the first indication information and the second indication information; and demodulating the first signal according to the DMRS corresponding to the N first DMRS ports and the DMRS corresponding to the one or more second DMRS ports. Wherein, the one or more second DMRS ports do not belong to the same DMRS port set as the N first DMRS ports.

[0012] It can be seen that when the signals associated with each DMRS port in each DMRS port set are weakly correlated, or when the signals associated with each DMRS port in each DMRS port set do not interfere with each other, the terminal device determines one or more second DMRS ports in the DMRS port set that does not include N first DMRS ports.

[0013] In one implementation, the first indication information is carried in a Group Common Downlink Control Information (DCI). That is, the terminal device receives the first indication information via the Group Common DCI. Therefore, for the network device, multicasting the first indication information to multiple terminal devices via the Group Common DCI reduces signaling overhead compared to individually informing each terminal device of its highly interfering DMRS port.

[0014] Secondly, this application provides a signal transmission method, which corresponds to the signal transmission method described in the first aspect, and is explained from the perspective of a network device. In this method, the network device determines first indication information and second indication information, and sends the first indication information and the second indication information to a terminal device, and also sends the first signal to the terminal device. The first indication information is used to indicate one or more demodulation reference signal (DMRS) port sets, and the second indication information is used to indicate N first DMRS ports associated with the first signal; where N is greater than or equal to 1.

[0015] As can be seen, in this method, the network device sends a first indication message to the terminal device, and also sends a second indication message to indicate N first DMRS ports associated with the first signal. This is beneficial for the terminal device to process the first signal from the network device according to the first and second indication messages, thereby suppressing interference signals. Furthermore, the first indication message sent by the network device to the terminal device informs the terminal device of the DMRS ports causing strong interference by providing a set of one or more DMRS ports, rather than indicating each DMRS port individually. Therefore, this method helps reduce the signaling overhead required to notify the terminal device of the DMRS ports causing strong interference.

[0016] In one implementation, the signals associated with each DMRS port in each DMRS port set are strongly correlated; or, the signals associated with each DMRS port in each DMRS port set are strong interference signals. This approach allows the terminal device to identify the strongly interfering DMRS ports in the DMRS port set, including the first DMRS port, based on this relationship, thereby facilitating the terminal device to process the first signal from the network device based on the strongly interfering DMRS ports.

[0017] In another implementation, the signals associated with each DMRS port in each DMRS port set have weak correlation; or, the signals associated with each DMRS port in each DMRS port set do not interfere with each other. This approach allows the terminal device to identify the strongly interfering DMRS ports in the DMRS port set excluding the first DMRS port based on this relationship, thereby facilitating the terminal device to process the first signal from the network device based on the strongly interfering DMRS ports.

[0018] In one implementation, the first indication information is carried in a group common downlink control information (DCI). That is, the network device can multicast the first indication information to one or more terminal devices via the group common DCI. Compared to the method where the network device individually informs each terminal device of the highly interfering DMRS port, this reduces the signaling overhead of the network device.

[0019] Thirdly, this application provides another signal transmission method. In this method, a terminal device receives downlink control information (DCI) from a network device; determines whether the DCI includes third indication information based on the number of ports of N first demodulation reference signal (DMRS) ports associated with the first signal and / or the number of code division multiplexing (CDM) groups that do not carry data, wherein N is greater than or equal to 1; receives the first signal from the network device; when the DCI includes the third indication information, processes the first signal according to the third indication information and the N first DMRS ports; when the DCI does not include the third indication information, processes the first signal according to the N first DMRS ports. The third indication information is used to indicate one or more second DMRS ports, or, one or more CDM groups corresponding to the second DMRS ports; the one or more second DMRS ports are different from the N first DMRS ports.

[0020] It is evident that when the terminal device includes third indication information in the DCI, it can directly obtain one or more second DMRS ports through the third indication information and process the first signal based on the one or more second DMRS ports and N first DMRS ports. This method helps reduce the processing complexity of the terminal device. When the DCI does not include third indication information, the terminal device can also process the first signal itself based on the N first DMRS ports to suppress interference signals. For network devices, when the DCI does not include third indication information, the signaling overhead required to send the DCI can be reduced.

[0021] In one embodiment, the terminal device determines whether the DCI includes third indication information based on the number of ports of the N first demodulation reference signal (DMRS) ports associated with the first signal and / or the number of code division multiplexing (CDM) groups that do not carry data. This includes: determining that the DCI includes third indication information when the number of ports of the N first DMRS ports associated with the first signal is less than a first preset value and the number of CDM groups that do not carry data is not less than a second preset value; and determining that the DCI does not include third indication information when the number of ports of the N first DMRS ports associated with the first signal is not less than the first preset value, or the number of CDM groups that do not carry data is less than the second preset value.

[0022] In one embodiment, when the terminal device includes the third indication information in the DCI, it processes the first signal according to the third indication information, including: demodulating the first signal according to the DMRS corresponding to the N first DMRS ports and the DMRS corresponding to the one or more second DMRS ports; or, demodulating the first signal according to the DMRS signals of the DMRS ports in the CDM group corresponding to the N first DMRS ports and the one or more second DMRS ports. Therefore, when the terminal device determines that the DCI includes the third indication information, it can directly obtain one or more second DMRS ports through the third indication information, which helps to reduce the processing complexity of the terminal device.

[0023] In another implementation, when the terminal device does not include the third indication information in the DCI, it processes the first signal according to the N first DMRS ports, including: determining one or more second DMRS ports based on the N first DMRS ports and the number of CDM groups that do not carry data; and demodulating the first signal according to the DMRS corresponding to the N first DMRS ports and the DMRS corresponding to the one or more second DMRS ports. Therefore, when the terminal device determines that the third indication information is not included in the DCI, it can also determine one or more second DMRS ports itself based on the N first DMRS ports and the number of CDM groups that do not carry data. For network devices, when the third indication information is not included in the DCI, the content in the DCI sent by the network device is reduced, thereby reducing the signaling overhead of the network device.

[0024] In one embodiment, the first preset value is the maximum number of receiving antennas or the maximum number of data streams supported by the terminal device, and the second preset value is the maximum number of CDM groups configured by the network device.

[0025] In one embodiment, the DCI includes second indication information, which indicates the number of the N first DMRS ports and the number of CDM groups that do not carry data. It is evident that both the second and third indication information are sent to the terminal device through the same DCI, which helps reduce the signaling overhead of the network device.

[0026] Fourthly, this application provides another signal transmission method, which corresponds to the signal transmission method described in the third aspect, and is described from the perspective of a network device. In this method, the network device determines Downlink Control Information (DCI); sends the DCI to a terminal device, and sends a first signal to the terminal device. Wherein, when the number of ports of the N first DMRS ports associated with the first signal is less than a first preset value, and the number of CDM groups that do not carry data is not less than a second preset value, the DCI includes third indication information; the third indication information is used to indicate one or more second DMRS ports, or, one or more CDM groups corresponding to the second DMRS ports; the one or more second DMRS ports are different from the N first DMRS ports; and N is greater than or equal to 1.

[0027] It is evident that when the number of the N first DMRS ports associated with the first signal is less than a first preset value, and the number of CDM groups that do not carry data is not less than a second preset value, the DCI sent by the network device to the terminal device includes third indication information. This allows the terminal device to directly obtain information about one or more second DMRS ports through the third indication information, which helps reduce the processing complexity of the terminal device. If this condition is not met, the DCI sent by the network device to the terminal device does not include the third indication information, reducing the content of the DCI sent by the network device and thus reducing the signaling overhead of the network device.

[0028] In one embodiment, the first preset value is the maximum number of receiving antennas or the maximum number of data streams supported by the terminal device, and the second preset value is the maximum number of CDM groups configured by the network device.

[0029] In one embodiment, the DCI includes second indication information, which indicates the number of the N first DMRS ports and the number of CDM groups that do not carry data. That is, both the second and third indication information are sent to the terminal device through the same DCI, which helps reduce the signaling overhead of the network device.

[0030] Fifthly, this application provides another signal transmission method. In this method, a terminal device receives downlink control information (DCI); the terminal device determines whether the DCI includes third indication information based on fourth indication information in the DCI; the terminal device receives a first signal from a network device; when the DCI includes the third indication information, the terminal device processes the first signal according to the third indication information; when the DCI does not include the third indication information, the terminal device processes the first signal according to N first DMRS ports associated with the first signal; where N is greater than or equal to 1. The DCI includes fourth indication information; the fourth indication information indicates whether the DCI includes third indication information; the third indication information indicates one or more second demodulation reference signal (DMRS) ports, or code division multiplexing (CDM) groups corresponding to one or more second DMRS ports; the one or more second DMRS ports are different from the N first DMRS ports associated with the first signal.

[0031] As can be seen, the terminal device can directly determine whether the DCI includes the third indication information through the fourth indication information. Compared with the above method of determining whether the DCI includes the third indication information through the number of ports of the first DMRS port and / or the number of CDM groups that do not carry data, this method is more conducive to the terminal device to determine whether the DCI includes the third indication information more intuitively and quickly, and can reduce the processing complexity of the terminal device.

[0032] In one embodiment, the terminal device determines whether the DCI still includes the third indication information based on the fourth indication information, including: when the fourth indication information indicates a first state, the terminal device determines that the DCI includes the third indication information; when the fourth indication information indicates a second state, the terminal device determines that the DCI does not include the third indication information.

[0033] In one embodiment, when the DCI includes the third indication information, the terminal device processes the first signal according to the third indication information, including: the terminal device demodulating the first signal according to the DMRS corresponding to the N first DMRS ports associated with the first signal and the DMRS corresponding to the one or more second DMRS ports; or, the terminal device demodulating the first signal according to the DMRS corresponding to the N first DMRS ports associated with the first signal and the DMRS of the DMRS ports in the CDM group corresponding to the one or more second DMRS ports.

[0034] In one embodiment, when the DCI does not include third indication information, the terminal device processes the first signal according to N first DMRS ports associated with the first signal, including: the terminal device determines one or more second DMRS ports according to the N first DMRS ports associated with the first signal and the number of code division multiplexing (CDM) groups that do not carry data; the terminal device demodulates the first signal according to the DMRS corresponding to the N first DMRS ports and the DMRS corresponding to the one or more second DMRS ports.

[0035] It is evident that when the DCI includes third indication information, the terminal device can directly obtain one or more second DMRS ports based on the third indication information, which helps reduce the processing complexity of the terminal device. When the DCI does not include third indication information, the terminal device can also determine one or more second DMRS ports based on the N first DMRS ports and the number of code division multiplexing (CDM) groups that do not carry data. In this way, it helps reduce the signaling overhead of the network device.

[0036] In one implementation, the DCI includes second indication information, which indicates the number of the N first DMRS ports and the number of CDM groups that do not carry data. That is, both the fourth and second indication information are sent to the terminal device through the same DCI, which helps reduce the signaling overhead of the network device.

[0037] Sixthly, this application provides another signal transmission method, which corresponds to the signal transmission method described in the fifth aspect, and is described from the perspective of a network device. In this method, the network device sends downlink control information (DCI) to a terminal device and sends a first signal to the terminal device. The DCI includes fourth indication information; when indicating a first state, the fourth indication information is used to indicate that the DCI includes third indication information; the third indication information is used to indicate one or more second demodulation reference signal (DMRS) ports, or code division multiplexing (CDM) groups corresponding to one or more second demodulation reference signal (DMRS) ports; the one or more second DMRS ports are different from the N first DMRS ports associated with the first signal.

[0038] It is evident that the network device only includes the third indication information in the DCI sent to the terminal device when the fourth indication information indicates the first state, and does not include the third indication information in the DCI sent to the terminal device when the fourth indication information indicates the second state. Therefore, when the third indication information is not included in the DCI, the content of the DCI sent by the network device is reduced, which can reduce the signaling overhead of the network device.

[0039] In one embodiment, when the number of ports of the N first DMRS ports associated with the first signal is less than a first preset value, and the number of CDM groups that do not carry data is not less than a second preset value, the network device determines that the fourth indication information indicates a first state; where N is greater than or equal to 1; when the number of ports of the N first DMRS ports associated with the first signal is not less than the first preset value, or when the number of CDM groups that do not carry data is less than the second preset value, the network device determines that the fourth indication information indicates a second state.

[0040] In one embodiment, the first preset value is the maximum number of receiving antennas or the maximum number of data streams supported by the terminal device, and the second preset value is the maximum number of CDM groups configured by the network device.

[0041] In one implementation, the DCI includes second indication information, which indicates the number of the N first DMRS ports and the number of CDM groups that do not carry data. That is, the second and fourth indication information are sent to the terminal device through the same DCI, which reduces the signaling overhead of the network device.

[0042] Seventhly, this application also provides a communication device. This communication device has some or all of the functions of the terminal device described in the first, third, and fifth aspects above. For example, the communication device may have the functions of some or all of the embodiments of the terminal device in this application, or it may have the functions of implementing any one embodiment of this application individually. The functions can be implemented by hardware or by hardware executing corresponding software. The hardware or software includes one or more units or modules corresponding to the above functions.

[0043] In one possible design, the communication device may include a processing unit and a communication unit. The processing unit is configured to support the communication device in performing the corresponding functions described in the above method. The communication unit supports communication between the communication device and other communication devices. The communication device may also include a storage unit coupled to the processing unit and the communication unit, which stores necessary program instructions and data for the communication device.

[0044] In one embodiment, the communication device includes:

[0045] A communication unit is used to receive first indication information and second indication information from a network device;

[0046] The communication unit is also used to receive a first signal from a network device;

[0047] The processing unit is configured to process the first signal according to the first indication information and the second indication information.

[0048] Wherein, the first indication information is used to indicate one or more demodulation reference signal (DMRS) port sets, and the second indication information is used to indicate N first DMRS ports associated with the first signal; wherein N is greater than or equal to 1.

[0049] In addition, other alternative implementations of the communication device in this regard can be found in the relevant content of the first aspect above, and will not be described in detail here.

[0050] In another embodiment, the communication device includes:

[0051] The communication unit is used to receive downlink control information (DCI) from network devices;

[0052] The processing unit is configured to determine whether the DCI includes third indication information based on the number of ports of the N first demodulation reference signal (DMRS) ports associated with the first signal and / or the number of code division multiplexing (CDM) groups that do not carry data.

[0053] The communication unit is also configured to receive the first signal from the network device;

[0054] The processing unit is further configured to process the first signal according to the third indication information and the N first DMRS ports when the DCI includes the third indication information; and to process the first signal according to the N first DMRS ports when the DCI does not include the third indication information.

[0055] Wherein, N is greater than or equal to 1; the third indication information is used to indicate one or more second DMRS ports, or, one or more second DMRS ports corresponding to CDM groups; the one or more second DMRS ports are different from the N first DMRS ports.

[0056] In addition, other alternative implementations of the communication device in this regard can be found in the relevant content of the third aspect above, and will not be described in detail here.

[0057] In another embodiment, the communication device includes:

[0058] The communication unit is used to receive downlink control information (DCI).

[0059] The processing unit is configured to determine whether the third indication information is included in the DCI based on the fourth indication information in the DCI;

[0060] The communication unit is also used to receive a first signal from a network device;

[0061] The processing unit is further configured to process the first signal according to the third indication information when the DCI includes the third indication information; and to process the first signal according to N first DMRS ports associated with the first signal when the DCI does not include the third indication information; wherein N is greater than or equal to 1.

[0062] The DCI includes fourth indication information; the fourth indication information is used to indicate whether the DCI includes third indication information; the third indication information is used to indicate one or more second demodulation reference signal (DMRS) ports, or code division multiplexing (CDM) groups corresponding to one or more second DMRS ports; the one or more second DMRS ports are different from the N first DMRS ports associated with the first signal.

[0063] In addition, other alternative implementations of the communication device in this regard can be found in the relevant content of the fifth aspect above, and will not be described in detail here.

[0064] As an example, the communication unit can be a transceiver or a communication interface, the storage unit can be a memory, and the processing unit can be a processor.

[0065] In one embodiment, the communication device includes:

[0066] A transceiver is used to receive first and second indication information from network devices;

[0067] The transceiver is also used to receive a first signal from the network device;

[0068] A processor is configured to process the first signal according to the first indication information and the second indication information.

[0069] Wherein, the first indication information is used to indicate one or more demodulation reference signal (DMRS) port sets, and the second indication information is used to indicate N first DMRS ports associated with the first signal; wherein N is greater than or equal to 1.

[0070] In addition, other alternative implementations of the communication device in this regard can be found in the relevant content of the first aspect above, and will not be described in detail here.

[0071] In another embodiment, the communication device includes:

[0072] A transceiver is used to receive downlink control information (DCI) from network devices;

[0073] The processor is configured to determine whether the DCI includes third indication information based on the number of ports of the N first demodulation reference signal (DMRS) ports associated with the first signal and / or the number of code division multiplexing (CDM) groups that do not carry data.

[0074] The transceiver is also used to receive a first signal from the network device;

[0075] The processor is further configured to process the first signal according to the third indication information and the N first DMRS ports when the DCI includes the third indication information; and to process the first signal according to the N first DMRS ports when the DCI does not include the third indication information.

[0076] Wherein, N is greater than or equal to 1; the third indication information is used to indicate one or more second DMRS ports, or, one or more second DMRS ports corresponding to CDM groups; the one or more second DMRS ports are different from the N first DMRS ports.

[0077] In addition, other alternative implementations of the communication device in this regard can be found in the relevant content of the third aspect above, and will not be described in detail here.

[0078] In another embodiment, the communication device includes:

[0079] Transceiver, used to receive downlink control information (DCI);

[0080] A processor is configured to determine, based on the fourth indication information in the DCI, whether the third indication information is included in the DCI;

[0081] The transceiver is also used to receive a first signal from the network device;

[0082] The processor is configured to process the first signal according to the third indication information when the DCI includes the third indication information; and to process the first signal according to N first DMRS ports associated with the first signal when the DCI does not include the third indication information; wherein N is greater than or equal to 1.

[0083] The DCI includes fourth indication information; the fourth indication information is used to indicate whether the DCI includes third indication information; the third indication information is used to indicate one or more second demodulation reference signal (DMRS) ports, or code division multiplexing (CDM) groups corresponding to one or more second DMRS ports; the one or more second DMRS ports are different from the N first DMRS ports associated with the first signal.

[0084] In addition, other alternative implementations of the communication device in this regard can be found in the relevant content of the fifth aspect above, and will not be described in detail here.

[0085] In implementation, the processor can be used for, but is not limited to, baseband-related processing, and the transceiver can be used for, but is not limited to, radio frequency (RF) transceiver. These devices can be disposed on separate chips, or at least partially or entirely on the same chip. For example, the processor can be further divided into analog baseband processors and digital baseband processors. The analog baseband processor can be integrated with the transceiver on the same chip, while the digital baseband processor can be disposed on a separate chip. With the continuous development of integrated circuit technology, more and more devices can be integrated on the same chip. For example, a digital baseband processor can be integrated with multiple application processors (e.g., but not limited to graphics processors, multimedia processors, etc.) on the same chip. Such a chip can be called a system-on-a-chip (SoC). Whether the devices are disposed independently on different chips or integrated on one or more chips often depends on the needs of the product design. This application does not limit the implementation form of the above-mentioned devices.

[0086] Eighthly, this application also provides a communication device. This communication device has some or all of the functions of the network device described in the examples of the methods described in the second, fourth, and sixth aspects above. For example, the communication device may have the functions of some or all of the network device embodiments in this application, or it may have the functions of any one embodiment of this application implemented individually. The functions may be implemented by hardware or by hardware executing corresponding software. The hardware or software includes one or more units or modules corresponding to the above functions.

[0087] In one possible design, the communication device may include a processing unit and a communication unit. The processing unit is configured to support the communication device in performing the corresponding functions described in the above-described method. The communication unit supports communication between the communication device and other communication devices. The communication device may also include a storage unit coupled to the processing unit and the transmitting unit, which stores necessary program instructions and data for the communication device.

[0088] In one embodiment, the communication device includes:

[0089] The processing unit is used to determine the first indication information and the second indication information;

[0090] A communication unit is configured to send the first indication information and the second indication information to a terminal device;

[0091] The communication unit is also used to send a first signal to the terminal device.

[0092] Wherein, the first indication information is used to indicate one or more demodulation reference signal (DMRS) port sets, and the second indication information is used to indicate N first DMRS ports associated with the first signal; wherein N is greater than or equal to 1.

[0093] In addition, other alternative implementations of the communication device in this regard can be found in the relevant content of the second aspect above, and will not be described in detail here.

[0094] In another embodiment, the communication device includes:

[0095] The processing unit is used to determine the downlink control information (DCI).

[0096] The communication unit is also used to send the DCI to the terminal device;

[0097] The communication unit is also used to send a first signal to the terminal device.

[0098] Wherein, when the number of ports of the N first DMRS ports associated with the first signal is less than a first preset value, and the number of CDM groups that do not carry data is not less than a second preset value, the DCI includes third indication information; the third indication information is used to indicate one or more second DMRS ports, or, one or more CDM groups corresponding to the second DMRS ports; the one or more second DMRS ports are different from the N first DMRS ports; and N is greater than or equal to 1.

[0099] In addition, other alternative implementations of the communication device in this regard can be found in the relevant content of the fourth aspect above, and will not be described in detail here.

[0100] In another embodiment, the communication device includes:

[0101] The communication unit is used to send downlink control information (DCI) to the terminal equipment.

[0102] The communication unit is also used to send a first signal to the terminal device.

[0103] The DCI includes fourth indication information; when indicating the first state, the fourth indication information is used to indicate that the DCI includes third indication information; the third indication information is used to indicate one or more second demodulation reference signal (DMRS) ports, or code division multiplexing (CDM) groups corresponding to one or more second demodulation reference signal (DMRS) ports; the one or more second DMRS ports are different from the N first DMRS ports associated with the first signal.

[0104] In addition, other alternative implementations of the communication device in this regard can be found in the relevant content of the sixth aspect above, and will not be described in detail here.

[0105] As an example, the processing unit can be a processor, the communication unit can be a transceiver or a communication interface, and the storage unit can be a memory.

[0106] In one embodiment, the communication device includes:

[0107] A processor, configured to determine the first indication information and the second indication information;

[0108] A transceiver is used to send the first indication information and the second indication information to a terminal device;

[0109] The transceiver is also used to send a first signal to the terminal device.

[0110] Wherein, the first indication information is used to indicate one or more demodulation reference signal (DMRS) port sets, and the second indication information is used to indicate N first DMRS ports associated with the first signal; wherein N is greater than or equal to 1.

[0111] In addition, other alternative implementations of the communication device in this regard can be found in the relevant content of the second aspect above, and will not be described in detail here.

[0112] In another embodiment, the communication device includes:

[0113] The processor is used to determine the downlink control information (DCI).

[0114] A transceiver is used to send the DCI to the terminal device and to send a first signal to the terminal device.

[0115] Wherein, when the number of ports of the N first DMRS ports associated with the first signal is less than a first preset value, and the number of CDM groups that do not carry data is not less than a second preset value, the DCI includes third indication information; the third indication information is used to indicate one or more second DMRS ports, or, one or more CDM groups corresponding to the second DMRS ports; the one or more second DMRS ports are different from the N first DMRS ports; and N is greater than or equal to 1.

[0116] In addition, other alternative implementations of the communication device in this regard can be found in the relevant content of the fourth aspect above, and will not be described in detail here.

[0117] In another embodiment, the communication device includes:

[0118] A transceiver is used to send downlink control information (DCI) to terminal devices.

[0119] The transceiver is also used to send a first signal to the terminal device.

[0120] The DCI includes fourth indication information; when indicating the first state, the fourth indication information is used to indicate that the DCI includes third indication information; the third indication information is used to indicate one or more second demodulation reference signal (DMRS) ports, or code division multiplexing (CDM) groups corresponding to one or more second demodulation reference signal (DMRS) ports; the one or more second DMRS ports are different from the N first DMRS ports associated with the first signal.

[0121] In addition, other alternative implementations of the communication device in this regard can be found in the relevant content of the sixth aspect above, and will not be described in detail here.

[0122] Ninthly, this application also provides a processor for executing the various methods described above. In executing these methods, the processes of sending and receiving the aforementioned information can be understood as the processor outputting the aforementioned information and the processor receiving the input information. When outputting the aforementioned information, the processor outputs the information to a transceiver for transmission. After being output by the processor, the information may require further processing before reaching the transceiver. Similarly, when the processor receives the input information, the transceiver receives the information and inputs it to the processor. Furthermore, after the transceiver receives the information, the information may require further processing before being input to the processor.

[0123] Based on the above principles, for example, sending the first instruction information and the second instruction information mentioned in the aforementioned method can be understood as the processor outputting the first instruction information and the second instruction information. Similarly, receiving the first instruction information and the second instruction information can be understood as the processor receiving the input first instruction information and the second instruction information.

[0124] Unless otherwise specified, or unless it contradicts its actual function or internal logic in the relevant description, the transmission, receiving, and receiving operations involved in the processor can be more generally understood as processor output and receiving, input, and other operations, rather than transmission, receiving, and receiving operations directly performed by radio frequency circuits and antennas.

[0125] In implementation, the processor can be a dedicated processor for executing these methods, or it can be a processor that executes computer instructions stored in memory to execute these methods, such as a general-purpose processor. The memory can be a non-transitory memory, such as read-only memory (ROM), which can be integrated with the processor on the same chip or disposed on different chips. This application does not limit the type of memory or the arrangement of the memory and the processor.

[0126] In a tenth aspect, this application also provides a communication system comprising at least one terminal device and at least one network device as described above. In another possible design, the system may further include other devices that interact with the terminal device or network device as provided in this application.

[0127] In an eleventh aspect, this application provides a computer-readable storage medium for storing computer software instructions that, when executed by a communication device, implement the method described in the first aspect above.

[0128] In a twelfth aspect, this application provides a computer-readable storage medium for storing computer software instructions that, when executed by a communication device, implement the method described in the second aspect above.

[0129] In a thirteenth aspect, this application provides a computer-readable storage medium for storing computer software instructions that, when executed by a communication device, implement the method described in the third aspect above.

[0130] In a fourteenth aspect, this application provides a computer-readable storage medium for storing computer software instructions that, when executed by a communication device, implement the method described in the fourth aspect above.

[0131] In a fifteenth aspect, this application provides a computer-readable storage medium for storing computer software instructions that, when executed by a communication device, implement the method described in the fifth aspect above.

[0132] In a sixteenth aspect, this application provides a computer-readable storage medium for storing computer software instructions that, when executed by a communication device, implement the method described in the sixth aspect above.

[0133] In a seventeenth aspect, this application also provides a computer program product including instructions that, when run on a communication device, cause the communication device to perform the method described in the first aspect above.

[0134] In an eighteenth aspect, this application also provides a computer program product including instructions that, when run on a communication device, cause the communication device to perform the method described in the second aspect above.

[0135] In a nineteenth aspect, this application also provides a computer program product including instructions that, when run on a communication device, cause the communication device to perform the method described in the third aspect above.

[0136] In a twentieth aspect, this application also provides a computer program product including instructions that, when run on a communication device, cause the communication device to perform the method described in the fourth aspect above.

[0137] In a twentieth aspect, this application also provides a computer program product including instructions that, when run on a communication device, cause the communication device to perform the method described in the fifth aspect above.

[0138] In a twentieth aspect, this application also provides a computer program product including instructions that, when run on a communication device, cause the communication device to perform the method described in the sixth aspect above.

[0139] In a twenty-third aspect, this application provides a chip system including a processor and an interface. The interface is used to acquire programs or instructions, and the processor is used to invoke the programs or instructions to implement or support a terminal in implementing the functions involved in the first to sixth aspects, such as determining or processing at least one of the data and information involved in the above methods. In one possible design, the chip system further includes a memory for storing necessary program instructions and data for the terminal. This chip system may be composed of chips or may include chips and other discrete devices. Attached Figure Description

[0140] Figure 1 This is a schematic diagram of the structure of a communication system provided in an embodiment of this application;

[0141] Figure 2 This is a schematic diagram of the structure of a CDM group provided in an embodiment of this application;

[0142] Figure 3a This is a schematic diagram of a communication scenario provided in an embodiment of this application;

[0143] Figure 3b This is a schematic diagram of another communication scenario provided in an embodiment of this application;

[0144] Figure 3c This is a schematic diagram of another communication scenario provided in the embodiments of this application;

[0145] Figure 4 This is a schematic flowchart of a signal transmission method provided in an embodiment of this application;

[0146] Figure 5 This is a schematic diagram of another communication scenario provided in the embodiments of this application;

[0147] Figure 6a This is a schematic diagram illustrating an indication of a DMRS port set provided in an embodiment of this application;

[0148] Figure 6b This is a schematic diagram illustrating yet another set of DMRS ports provided in an embodiment of this application;

[0149] Figure 7 This is a flowchart illustrating another signal transmission method provided in an embodiment of this application;

[0150] Figure 8 This is a flowchart illustrating another signal transmission method provided in an embodiment of this application;

[0151] Figure 9 This is a schematic diagram of the structure of a communication device provided in an embodiment of this application;

[0152] Figure 10 This is a schematic diagram of the structure of a chip provided in an embodiment of this application;

[0153] Figure 11 This is a schematic diagram of another communication device provided in an embodiment of this application. Detailed Implementation

[0154] The embodiments of this application will now be clearly and completely described with reference to the accompanying drawings.

[0155] First, in order to better understand the signal transmission method disclosed in the embodiments of this application, the communication system to which the embodiments of this application are applicable will be described.

[0156] The technical solutions of the embodiments of this application can be applied to various communication systems. For example, Global System for Mobile Communications (GSMA), Long Term Evolution (LTE) frequency division duplex system, LTE time division duplex system, Universal Mobile Communications System (UMS), 4th Generation (4G) system, and with the continuous development of communication technology, the technical solutions of the embodiments of this application can also be used in subsequent evolved communication systems, such as 5th Generation (5G) system, etc.

[0157] Please see Figure 1 , Figure 1 This is a schematic diagram of a communication system provided in an embodiment of this application. The communication system may include, but is not limited to, a network device and a terminal device. Figure 1 The number and form of devices shown are for illustrative purposes and do not constitute a limitation on the embodiments of this application. In actual applications, it may include two or more network devices and two or more terminal devices. Figure 1 The communication system illustrated uses a network device and a terminal device as an example, where the network device is capable of providing services to the terminal device. Figure 1 The network equipment in this example is a base station, and the terminal equipment is a mobile phone.

[0158] In this embodiment, the network device may be a device with wireless transceiver functionality or a chip that can be configured in the device. The network device includes, but is not limited to: evolved node B (eNB), radio network controller (RNC), node B (NB), base station controller (BSC), base transceiver station (BTS), home network device (e.g., home evolved Node B, or home Node B, HNB), baseband unit (BBU), access point (AP), wireless relay node, wireless backhaul node, and transmission and reception point (TRP or transmission...) in a Wi-Fi system. It can also refer to devices used in 4G, 5G, or even 6G systems, such as gNB in ​​NR systems, or transmission points (TRP or TP), one or a group of antenna panels (including multiple antenna panels) of network devices in 4G systems, or network nodes that constitute gNB or transmission points, such as baseband unit (BBU), or distributed unit (DU), or picocell, or femtocell, or roadside unit (RSU) in intelligent driving scenarios.

[0159] In this application embodiment, the terminal device may also be referred to as user equipment (UE), terminal, access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, user agent, or user device, and can be applied to 4G, 5G, or even 6G systems. The terminal device in this application embodiment can be a mobile phone, tablet computer, computer with wireless transceiver capabilities, virtual reality (VR) terminal, augmented reality (AR) terminal, wireless terminal in industrial control, wireless terminal in self-driving, wireless terminal in remote medical care, wireless terminal in smart grid, wireless terminal in transportation safety, wireless terminal in smart city, wireless terminal in smart home, RSU of the aforementioned wireless terminal types, etc.

[0160] To facilitate understanding of the embodiments disclosed in this application, the following two points are explained.

[0161] (1) The scenarios in the embodiments disclosed in this application are illustrated using the scenario of an NR network in a wireless communication network. It should be noted that the solutions in the embodiments disclosed in this application can also be applied to other wireless communication networks, and the corresponding names can be replaced by the names of the corresponding functions in other wireless communication networks.

[0162] (2) The embodiments disclosed in this application will be presented in relation to systems including multiple devices, components, modules, etc. It should be understood and appreciated that individual systems may include additional devices, components, modules, etc., and / or may not include all devices, components, modules, etc. discussed in conjunction with the accompanying drawings. Furthermore, combinations of these approaches may also be used.

[0163] Secondly, a brief introduction to the relevant concepts involved in the embodiments of this application will be given.

[0164] 1. First signal, DMRS port, first DMRS port, second DMRS port

[0165] The first signal is the downlink signal received by the terminal device from the network device, which can also be understood as the useful signal received by the terminal device from the network device; the demodulation reference signal (DMRS) is a reference signal used to demodulate the uplink or downlink signal, and the DMRS port is the port associated with the DMRS.

[0166] For ease of explanation, the DMRS port associated with the first signal is called the first DMRS port, that is, the DMRS port associated with the downlink signal is called the first DMRS port; the DMRS port associated with the interference signal received by the terminal device when receiving the first signal is called the second DMRS port, that is, the DMRS port associated with the interference signal is called the second DMRS port, or the second DMRS port can also be called the DMRS port of strong interference, or the second DMRS port of potential interference, or the DMRS port corresponding to the signal of the potential joint scheduling user.

[0167] 2. CDM Group

[0168] In Multiple-In Multiple-Out (MIMO) technology, the DMRS corresponding to different antenna ports can be multiplexed using time division, frequency division, and code division methods. For example, Figure 2 As shown, the horizontal direction represents the time domain, the vertical direction represents the frequency domain, and each small square represents a resource element (RE). DMRS port 0 and DMRS port 1 are multiplexed using orthogonal codes. Therefore, the REs corresponding to DMRS port 0 and DMRS port 1 are also called a code division multiplexing (CDM) group, namely CDM group 0. In addition, DMRS port 2 and DMRS port 3 are CDM group 1, and DMRS port 4 and DMRS port 5 are CDM group 2.

[0169] 3. First instruction information, second instruction information, third instruction information

[0170] The first indication information is used to indicate one or more demodulation reference signal (DMRS) port sets. The second indication information is used to indicate N first DMRS ports associated with the first signal, or, the second indication information is used to indicate the number of N first DMRS ports and non-data-carrying CDM groups, where N is greater than or equal to 1. The third indication information is used to indicate one or more second DMRS ports, or, one or more CDM groups corresponding to second DMRS ports. The fourth indication information is used to indicate whether the downlink control information (DCI) also includes the third indication information; when the fourth indication information indicates a first state, it means that the DCI includes the third indication information; when the fourth indication information indicates a second state, it means that the DCI does not include the third indication information.

[0171] The naming of the above information is not limited in the embodiments of this application. For example, the first indication information may also be called DMRS port set information, the second indication information may also be called the first DMRS port information, and so on.

[0172] Next, a brief description will be given of the technical problems to be solved by the embodiments of this application.

[0173] In some communication scenarios, when a terminal receives downlink signals from network devices, it may be interfered with by other signals. For example, in situations such as... Figure 3a In scenario 1, the first base station transmits signal A to terminal device A on time-frequency resource A, and simultaneously transmits signal B to terminal device B on time-frequency resource A. Since the first base station transmits both signal A and signal B on the same time-frequency resource, terminal device A will receive signal B while receiving the required signal A. At this time, signal B will interfere with terminal device A's reception of signal A; therefore, signal B is an interference signal for terminal device A. Similarly, for terminal device B, signal A is an interference signal for terminal device B.

[0174] For example, in such Figure 3b In the communication scenario 2 shown, when the first base station sends signal A to terminal device A on time-frequency resource A, the second base station in the adjacent cell A also receives signal B from terminal device B on time-frequency resource A. Therefore, when terminal device A receives signal A, it will also receive signal B from terminal device B, and thus signal B is an interference signal for terminal device A.

[0175] For example, in such Figure 3c In the communication scenario 3 shown, the first base station is a full-duplex base station, meaning that the first base station can simultaneously transmit and receive signals on the same frequency domain resources. When the first base station sends signal A to terminal device A, if terminal device B is sending signal B to the first base station, then terminal device A will receive signal B sent by the second terminal device while receiving signal A. Therefore, signal B is an interference signal for terminal device A.

[0176] It is evident that in communication scenarios like these, terminal devices need to suppress interference signals when receiving useful signals. To suppress the impact of interference signals on useful signals, terminal devices need to identify the DMRS port with strong interference. This allows the terminal device to demodulate signals from network devices based on the DMRS port with strong interference, thus suppressing the interference. Currently, network devices can notify each terminal device of the DMRS port with strong interference via Downlink Control Information (DCI), which results in significant signaling overhead.

[0177] Therefore, how network devices can inform terminal devices of the strong interference of DMRS ports is a problem that urgently needs to be solved.

[0178] This application provides signal transmission methods 100 to 300. In signal transmission method 100, a network device sends first indication information indicating one or more DMRS port sets and N first DMRS ports associated with a first signal to a terminal device. This facilitates the terminal device in demodulating the first signal from the network device based on the first and second indication information, thereby suppressing interference signals. Furthermore, the manner in which the network device sends the first indication information indicating one or more DMRS port sets helps reduce signaling overhead.

[0179] In signal transmission method 200, when the number of N first DMRS ports associated with the first signal is less than a first preset value, and the number of CDM groups that do not carry data is not less than a second preset value, the DCI sent by the network device to the terminal device includes third indication information. This allows the terminal device to directly process the first signal from the network device based on the third indication information, reducing the processing complexity of the terminal device. When the number of N first DMRS ports associated with the first signal is not less than the first preset value, or the number of CDM groups that do not carry data is less than the second preset value, the DCI sent by the network device to the terminal device does not include the third indication information, which helps reduce the signaling overhead of the network device. Additionally, the terminal device can also demodulate the first signal itself based on the number of first DMRS ports and the number of CDM groups that do not carry data, thereby suppressing interference signals.

[0180] In signal transmission method 300, the network device indicates whether the DCI includes third indication information based on fourth indication information used to indicate the status. This method reduces the signaling overhead of the network device compared to signal transmission method 200, which determines whether the DCI includes third indication information based on the number of ports of N first DMRS ports associated with the first signal and the number of CDM groups that do not carry data.

[0181] The embodiments of this application and their related implementation methods are described below with reference to the accompanying drawings.

[0182] Please see Figure 4 , Figure 4 This is a schematic flowchart of a signal transmission method 100 provided in an embodiment of this application. The signal transmission method 100 is described from the perspective of interaction between a terminal device and a network device. The signal transmission method 100 includes, but is not limited to, the following steps:

[0183] S101, The network device determines the first instruction information and the second instruction information;

[0184] The first indication information is used to indicate one or more DMRS port sets. Each DMRS port set in the one or more DMRS port sets includes one or more DMRS ports. The DMRS ports included in the one or more DMRS port sets are a subset of all DMRS ports configured by the network device for the terminal device. That is, the DMRS ports indicated by the first indication information are some or all of the DMRS ports configured by the network device.

[0185] The second indication information is used to indicate the N first DMRS ports associated with the first signal, where the first signal is the useful signal received by each terminal device.

[0186] For example, such as Figure 5 As shown, terminal device A and terminal device B are in the same cell, and terminal device C is in a neighboring cell close to terminal device B. When the first base station sends signal A to terminal device A on time-frequency resource A, the first base station also sends signal B to terminal device B on time-frequency resource A, and the second base station also sends signal C to terminal device C on time-frequency resource A. Signal A is the first signal of terminal device A, signal B is the first signal of terminal device B, and signal C is the first signal of terminal device C. Therefore, for terminal device A, the first DMRS ports associated with signal A are DMRS port 0 and DMRS port 1, and the second indication information determined by the network device for terminal device A is used to indicate DMRS port 0 and DMRS port 1; for terminal device B, the first DMRS ports associated with signal B are DMRS port 2 and DMRS port 3, and the second indication information determined by the network device for terminal device B is used to indicate DMRS port 2 and DMRS port 3; for terminal device C, the first DMRS ports associated with signal C are DMRS port 4 and DMRS port 5, and the second indication information determined by the network device for terminal device B is used to indicate DMRS port 4 and DMRS port 5. The second instruction information is determined by the network device based on the different terminal devices.

[0187] In one implementation, the network device arbitrarily divides the multiple DMRS ports configured for the terminal device into multiple DMRS port sets, and then indicates one or more of these DMRS port sets using an index. In other words, the first indication information can be represented using an index.

[0188] For example, a network device configures four DMRS ports for a terminal device: DMRS port 0, DMRS port 1, DMRS port 2, and DMRS port 4. Assuming these four DMRS ports are divided into a first DMRS port set and a second DMRS port set, in one configuration, the first DMRS port set includes one DMRS port, and the second DMRS port set includes three DMRS ports. There are four ways to divide the DMRS ports when there is no overlap between the first and second DMRS port sets, and 16 ways when there is overlap. In another configuration, both the first and second DMRS port sets include two DMRS port sets. There are six ways to divide the DMRS ports when there is no overlap between the first and second DMRS port sets, and 36 ways when there is overlap. Therefore, if a network device divides four DMRS ports into a first DMRS port set and a second DMRS port set, there are 62 possible divisions. The network device can use 6 bits to indicate one of these DMRS port set combinations, that is, to indicate two DMRS port sets among multiple DMRS port sets. When the network device determines that one or more DMRS port sets indicated by the first indication information are DMRS port set 0 and DMRS port set 3 in Table 1, the network device determines the index to be 000010, that is, the first indication information is 000010.

[0189] Table 1

[0190] index DMRS port set 000000 DMRS port set 0, DMRS port set 1 000001 DMRS port set 0, DMRS port set 2 000010 DMRS port set 0, DMRS port set 3 …… ...... 111111 DMRS port set 61, DMRS port set 62

[0191] S102, The network device sends the first instruction information and the second instruction information to the terminal device;

[0192] S103, The network device sends the first signal to the terminal device;

[0193] S104. The terminal device receives first instruction information and second instruction information from the network device;

[0194] S105. The terminal device receives the first signal from the network device and processes the first signal according to the first instruction information and the second instruction information.

[0195] Here, the reception of the first signal by the terminal device can be understood as the terminal device obtaining the first signal from the network device, excluding the processing of the first signal; that is, the reception of the first signal here can be understood as reception in a narrow sense. The processing of the first signal by the terminal device according to the first and second indication information can be understood as the demodulation processing of the first signal by the terminal device according to the first and second information, excluding the reception of the first signal; that is, the processing of the first signal here can also be understood as processing in a narrow sense. When the reception of the first signal by the terminal device is understood as reception in a broad sense, that is, including the processing of the first signal, S105 may include: the terminal device receiving the first signal from the network device according to the first and second indication information. Alternatively, when the processing of the first signal by the terminal device according to the first and second indication information is understood as processing in a broad sense, that is, including the reception of the first signal, S105 can be described as: the terminal device processing the first signal from the network device according to the first and second indication information.

[0196] As can be seen, in this embodiment, the terminal device can demodulate the first signal from the network device using first indication information and second indication information used to indicate N first DMRS ports associated with the first signal, thereby suppressing interference signals. Furthermore, the first indication information sent by the network device is used to indicate one or more sets of DMRS ports, which, compared to indicating individual DMRS ports with strong interference corresponding to each terminal device, helps reduce the signaling overhead of the network device. Therefore, this embodiment can suppress interference signals and reduce the signaling overhead required for the network device to notify the terminal device of the DMRS ports with strong interference.

[0197] In one embodiment, the signals associated with each DMRS port in each DMRS port set are correlated. Therefore, the terminal device processes the first signal according to the first indication information and the second indication information, including: the terminal device determines one or more second DMRS ports based on the correlation between the signals associated with each DMRS port in each DMRS port set and the N first DMRS ports associated with the first signal indicated by the second indication information; thereby, the terminal device obtains a first channel coefficient based on the DMRS estimation corresponding to the N first DMRS ports, and obtains a second channel coefficient based on the DMRS estimation corresponding to the one or more second DMRS ports; and then processes the first signal based on the first channel coefficient and the second channel coefficient. This processing can be understood as demodulating the first signal.

[0198] In one implementation, the signals associated with each DMRS port in each DMRS port set are strongly correlated; or, the signals associated with each DMRS port in each DMRS port set are strongly interfering with each other. Strong correlation between signals can be understood as strong interference between signals. That is, the network device indicates one or more DMRS port sets based on the strong correlation between the signals associated with each DMRS port, or based on the relationship of strong interference between the signals associated with each DMRS port.

[0199] It should be noted that the strong correlation between signals associated with each DMRS port in each DMRS port set is relative to the correlation between signals associated with DMRS ports in different DMRS port sets; that is, the correlation between signals associated with each DMRS port in one DMRS port set is stronger than the correlation between signals associated with DMRS ports in different DMRS port sets. Similarly, the strong interference between signals associated with each DMRS port in each DMRS port set is relative to the correlation between signals associated with DMRS ports in different DMRS port sets; that is, the interference intensity between signals associated with each DMRS port in one DMRS port set is stronger than the interference intensity between signals associated with DMRS ports in different DMRS port sets. Therefore, when the terminal device receives the first indication information, it considers the interference of other DMRS ports on the first signal within the DMRS port set including the first DMRS port, but does not consider the interference of DMRS ports in other DMRS port sets on the first signal, or prioritizes the interference of other DMRS ports on the first signal within the DMRS port set including the first DMRS port, and then considers the interference of DMRS ports in other DMRS port sets on the first signal. In other words, for a set of DMRS ports including the first DMRS port, all other DMRS ports in the set are considered strong interference DMRS ports. This approach helps the terminal device, upon receiving the first indication information, to identify one or more second DMRS ports from the set of DMRS ports including the first DMRS port. Furthermore, the signals associated with each DMRS port in each DMRS port set being strong interference signals can also be described as potentially strong interference signals, or potentially interference signals, or signals corresponding to jointly scheduled DMRS ports.

[0200] Therefore, in step S104, the terminal device processes the first signal according to the first indication information, including: S1041, the terminal device determines one or more second DMRS ports according to the first indication information and the second indication information; the one or more second DMRS ports belong to the same DMRS port set as the N first DMRS ports; S1042, the first signal is demodulated according to the DMRS corresponding to the N first DMRS ports and the DMRS corresponding to the one or more second DMRS ports. Specifically, the terminal device determines the DMRS ports other than the first DMRS ports in the DMRS port set including the first DMRS ports as one or more second DMRS ports, then estimates the first channel information according to the DMRS corresponding to the N first DMRS ports, and estimates the second channel information according to the DMRS corresponding to the one or more second DMRS ports, and demodulates the first signal according to the first channel information and the second channel information. Since the second channel information is the channel information obtained according to the DMRS corresponding to the one or more second DMRS ports, and the second DMRS ports are DMRS ports with strong interference, this method can suppress interference signals.

[0201] For example, the communication scenario of terminal device A, terminal device B, and terminal device C is as described above. Figure 5 As shown, the first indication information determined by the network device indicates the set of DMRS ports as follows: Figure 6aAs shown, the first base station configures six DMRS ports for terminal devices A, B, and C, including DMRS ports 0-5. Signal A is associated with DMRS ports 0 and 1, signal B with DMRS ports 2 and 3, and signal C with DMRS ports 4 and 5. Since signal B is interference when terminal device A receives signal A, and signals A and C are interference when terminal device B receives signal C, and signal B is also interference when terminal device C receives signal C, the first base station, based on the strong correlation between the signals in the DMRS port sets, indicates two DMRS port sets through the first indication information: DMRS port set 0 and DMRS port set 1. DMRS port set 0 includes DMRS ports 0, 1, 2, and 3, while DMRS port set 1 includes DMRS ports 2, 3, 4, and 5. It can be seen that there is a strong correlation between signal A associated with DMRS port 0 and DMRS port 1 in DMRS port set 0 and signal B associated with DMRS port 2 and DMRS port 3. This strong correlation means that A and signal B are interference signals to each other. There is also a strong correlation between signal B associated with DMRS port 2 and DMRS port 3 in DMRS port set 1 and signal C associated with DMRS port 4 and DMRS port 5.

[0202] The first DMRS port is the DMRS port associated with the useful signal received by the terminal device. Therefore, for terminal device A, the first DMRS ports are DMRS port 0 and DMRS port 1. DMRS port 0 and DMRS port 1 are in DMRS port set 0. Since the signals associated with each DMRS port in DMRS port set 0 are strongly correlated, DMRS port 2 and DMRS port 3 in DMRS port set 0 are the second DMRS ports of terminal device A. That is to say, DMRS port 2 and DMRS port 3 are the DMRS ports of terminal device A with strong interference. For terminal device B, the first DMRS ports are DMRS port 2 and DMRS port 3. DMRS port 2 and DMRS port 3 are in DMRS port set 0 and DMRS port set 1, respectively. Similarly, the DMRS port set... DMRS ports 0 and 1 in set 0, and DMRS ports 4 and 5 in set 1 are the second DMRS ports of terminal device B. This means that DMRS ports 0, 1, 4, and 5 are strong interference DMRS ports for terminal device B. For terminal device C, the first DMRS ports are DMRS ports 4 and 5, which are in set 1. Similarly, DMRS ports 2 and 3 in set 1 are the second DMRS ports of terminal device C. This means that DMRS ports 2 and 3 are also strong interference DMRS ports for terminal device C. Therefore, if a network device indicates one or more DMRS port sets based on the strong correlation between the signals associated with each DMRS port in each DMRS port set, or the strong interference relationship between the signals associated with each DMRS port in each DMRS port set, then the first and second DMRS ports belong to the same indicated DMRS port set.

[0203] In another implementation, the signals associated with each DMRS port in each DMRS port set are weakly correlated; or, the signals associated with each DMRS port in each DMRS port set do not interfere with each other. That is, the network device indicates one or more DMRS port sets based on the weak correlation between the signals associated with each DMRS port, or based on the non-interference between the signals associated with each DMRS port.

[0204] It should be noted that the weak correlation between signals associated with each DMRS port in each DMRS port set is relative to the correlation between signals associated with DMRS ports across DMRS port sets; that is, the correlation between signals associated with each DMRS port in a DMRS port set is weaker than the correlation between signals associated with DMRS ports across DMRS port sets. Similarly, the lack of mutual interference between signals associated with each DMRS port in each DMRS port set is relative to the correlation between signals associated with DMRS ports across DMRS port sets; that is, the interference strength between signals associated with each DMRS port in a DMRS port set is weaker than the interference strength between signals associated with DMRS ports across DMRS port sets. Therefore, when the terminal device receives the first indication information, it considers the interference of DMRS ports in the DMRS port set excluding the first DMRS port on the first signal, but does not consider the interference of other DMRS ports in the DMRS port set including the first DMRS port on the first signal, or prioritizes the interference of DMRS ports in the DMRS port set excluding the first DMRS port on the first signal, and then considers the interference of other DMRS ports in the DMRS port set including the first DMRS port on the first signal. In other words, for a set of DMRS ports that includes the first DMRS port, the other DMRS ports in this set, excluding the first DMRS port, are not considered strong interference DMRS ports, while the DMRS ports in a set of DMRS ports that do not include the first DMRS port are considered strong interference DMRS ports. This method allows the terminal device to determine one or more second DMRS ports based on the set of DMRS ports that does not include the first DMRS port when it receives the first indication information. Furthermore, the signals associated with each DMRS port in each DMRS port set do not interfere with each other; this can also be described as not being potentially strong interference signals, or not being signals corresponding to jointly scheduled DMRS ports.

[0205] Therefore, in step S104, the terminal device processes the first signal according to the first indication information, including: S1041, the terminal device determines one or more second DMRS ports according to the first indication information and the second indication information; the one or more second DMRS ports do not belong to the same DMRS port set as the N first DMRS ports; S1042, the first signal is demodulated according to the DMRS corresponding to the N first DMRS ports and the DMRS corresponding to the one or more second DMRS ports. Specifically, the terminal device determines the DMRS ports in the DMRS port set that do not include the first DMRS ports as one or more second DMRS ports, then estimates the first channel information according to the DMRS corresponding to the N first DMRS ports, and estimates the second channel information according to the DMRS corresponding to the one or more second DMRS ports, and demodulates the first signal according to the first channel information and the second channel information. Since the second channel information is the channel information obtained according to the DMRS corresponding to the one or more second DMRS ports, and the second DMRS ports are DMRS ports with strong interference, this method can also suppress interference signals.

[0206] For example, the communication scenarios between the first base station, the second base station, and terminal device A, terminal device B, and terminal device C are also as described above. Figure 5 As shown. The first indication information determined by the network device indicates the set of DMRS ports as follows. Figure 6b As shown, the first base station configures six DMRS ports for terminal devices A, B, and C, including DMRS ports 0-5. Additionally, the DMRS ports associated with signal A are DMRS ports 0 and 1, the DMRS ports associated with the second signal are DMRS ports 2 and 3, and the DMRS ports associated with signal B are DMRS ports 4 and 5. Since signals A and C do not interfere with each other, the first base station, based on the weak correlation or lack of interference between the signals in the DMRS port sets, indicates two DMRS port sets as DMRS port set 0 and DMRS port set 1 through first indication information. DMRS port set 0 includes DMRS ports 0, 1, 4, and 5, while DMRS port set 1 includes DMRS ports 2 and 3. It can be seen that there is a weak correlation between signal A associated with DMRS port 0 and DMRS port 1 in DMRS port set 0 and signal A associated with DMRS port 4 and DMRS port 5. This weak correlation means that signal A and signal C do not interfere with each other. The signals associated with DMRS port 2 and DMRS port 3 in DMRS port set 1 are both signal B.

[0207] For device A, the first DMRS ports are DMRS port 0 and DMRS port 1. DMRS port 0 and DMRS port 1 are in DMRS port set 0. Since the signals associated with each DMRS port in DMRS port set 0 have weak correlation, that is, the signals associated with each DMRS port in DMRS port set 0 do not interfere with each other, the terminal device determines DMRS port 2 and DMRS port 3 in DMRS port set 1 (excluding DMRS port 0 and DMRS port 1) as the second DMRS ports of terminal device A; For terminal device B, the first DMRS port is DMRS... Ports 2 and 3 are in DMRS port set 1. Similarly, terminal device B identifies DMRS ports 0, 1, 4, and 5 in DMRS port set 0 as its second DMRS ports. For terminal device C, the first DMRS ports are DMRS ports 4 and 5, which are in DMRS port set 0. Similarly, terminal device C identifies DMRS ports 2 and 3 in DMRS port set 1 as its second DMRS ports. Therefore, if a network device indicates one or more DMRS port sets based on the weak correlation between the signals associated with each DMRS port in each DMRS port set, or the non-interference relationship between the signals associated with each DMRS port in each DMRS port set, then the first and second DMRS ports belong to the same indicated DMRS port set.

[0208] In one implementation, the first indication information sent by the network device is carried in a group common downlink control information (DCI), which is scrambled by a dedicated Radio Network Temporary Identity (RNTI). The network device multicasts the first indication information to multiple terminal devices via this group common DCI, thereby enabling the multiple terminal devices to obtain the same one or more DMRS port sets. For example, in... Figure 5 In this process, after determining the first indication information, the first base station multicasts the first indication information to terminal device A, terminal device B and terminal device C through the group common DCI, instead of sending it to each terminal device individually. This method enables one or more terminal devices to know the first indication information used to indicate one or more DMRS port sets while reducing the signaling overhead of network devices.

[0209] Furthermore, before receiving the group common DCI carrying the first indication information, the terminal device needs to know in advance the value of the dedicated RNTI used to scramble the group common DCI or the parameters used to determine the value of the dedicated RNTI. In one implementation, the value of the dedicated RNTI or the parameters used to determine the value of the dedicated RNTI can be notified to the terminal device in advance by the network device through other signaling, such as through RRC signaling or MAC layer signaling.

[0210] In another implementation, the value of the dedicated RNTI or the parameters used to determine the value of the dedicated RNTI includes at least a first part and a second part. The terminal device can determine the value of the dedicated RNTI or the parameters used to determine the value of the dedicated RNTI through the first part and the second part. The first part is pre-notified to the terminal device by the network device through other signaling, such as RRC signaling or MAC layer signaling. The second part is carried by the DCI carrying the second indication information. For example, the second part is explicitly carried in a field of the DCI carrying the second indication information, or implicitly carried in the resource location information of the control channel carrying the DCI, or the number of the Control Channel Element (CCE), etc. In this implementation, the terminal device receiving the first and second indication information from the network device in S104 may include the following steps:

[0211] S1041. The terminal device receives a second instruction information from the network device;

[0212] S1042. The terminal device determines the scrambling identifier for receiving the DCI carrying the first indication information based on the DCI carrying the second indication information or the fifth indication information in the DCI. The fifth indication information is the resource location of the control channel or the number of the control resource unit of the DCI carrying the first indication information.

[0213] S1043. The terminal device receives first indication information from the network device according to the scrambling identifier.

[0214] Please see Figure 7 , Figure 7 This is a schematic diagram of another signal transmission method 200 provided in an embodiment of this application. This information signal transmission method 200 is also described from the perspective of interaction between a terminal device and a network device. This signal transmission method 200 includes, but is not limited to, the following steps:

[0215] S201. Network equipment determines Downlink Control Information (DCI);

[0216] S202, The network device sends DCI to the terminal device;

[0217] S203, The network device sends the first signal to the terminal device;

[0218] S204. The terminal device receives downlink control information (DCI) from the network device.

[0219] S205. The terminal device determines whether the DCI includes third indication information based on the number of ports of the N first demodulation reference signal DMRS ports associated with the first signal and / or the number of code division multiplexing (CDM) groups that do not carry data.

[0220] S206. The terminal device receives the first signal from the network device;

[0221] S207. When the terminal device includes third indication information in the DCI, it processes the first signal according to the third indication information and N first DMRS ports; when the DCI does not include third indication information, it processes the first signal according to N first DMRS ports.

[0222] In S201, when the number of ports of the N first DMRS ports associated with the first signal is less than a first preset value, and the number of CDM groups that do not carry data is not less than a second preset value, the DCI includes third indication information for indicating one or more second DMRS ports, or the DCI includes third indication information for indicating CDM groups corresponding to one or more second DMRS ports, and the DMRS ports in the CDM groups corresponding to one or more second DMRS ports are all second DMRS ports.

[0223] For example, such as Figure 2 As shown, the DMRS ports assigned to the terminal device by the network device are DMRS port 0-DMRS port 5. The first DMRS ports associated with the first signal are DMRS port 0 and DMRS port 1. The first preset value is 4, the second preset value is 3, and the number of CDM groups that do not carry data is 3. Since the number of CDM groups that do not carry data is 3, and the first DMRS port is in CDM group 0, one or more second DMRS ports can be in CDM group 1 or CDM group 2. If the network device does not indicate one or more second DMRS ports, or if the network device does not indicate the CDM group corresponding to one or more second DMRS ports, the terminal device cannot determine one or more second DMRS ports. Therefore, the DCI determined by the network device includes third indication information for indicating one or more second DMRS ports, or the DCI includes third indication information for indicating the CDM group corresponding to one or more second DMRS ports. That is, the third indication information is used to indicate that the second DMRS ports are DMRS port 2 and DMRS port 3, or the third indication information is used to indicate that the CDM group corresponding to the second DMRS ports is CDM group 2, and all DMRS ports in CDM group 2 are second DMRS ports.

[0224] In another implementation, when the number of ports of the N first DMRS ports associated with the first signal is not less than a first preset value, or when the number of CDM groups that do not carry data is less than a second preset value, the third indication information is not included in the DCI.

[0225] For example, such as Figure 2 As shown, the DMRS ports assigned by the network device to the terminal device are DMRS port 0-DMRS port 5. The first DMRS ports associated with the first signal are DMRS port 0 and DMRS port 1. The first preset value is 2, that is, the number of first DMRS ports is equal to the first preset value, which indicates that there is no interference signal interfering with the first signal. Therefore, the network device does not need to indicate the second DMRS port to the terminal device, or indicate the CDM group corresponding to the second DMRS port. That is, the DCI does not include the third indication information. Alternatively, the second preset value is 3, and the number of CDM groups that do not carry data is 2. Since the number of CDM groups that do not carry data is 2, and the first DMRS port that does not carry data is in CDM group 0, the second DMRS port that does not carry data can only be in CDM group 1. That is, DMRS port 2 and DMRS port 3 in CDM group 1 are the second DMRS ports. Therefore, the network device also does not need to indicate the second DMRS port to the terminal device, or indicate the CDM group corresponding to the second DMRS port. That is, the DCI does not include the third indication information.

[0226] In one implementation, the first preset value is the maximum number of receiving antennas or the maximum number of data streams supported by the terminal device, and the second preset value is the maximum number of CDM groups configured by the network device. Since the number of ports of the first DMRS port cannot exceed the maximum number of receiving antennas or the maximum number of data streams supported by the terminal device, and the number of CDM groups that do not carry data cannot exceed the maximum number of CDM groups configured by the network device, the DCI includes third indication information when the number of ports of the N first DMRS ports associated with the first signal is less than the first preset value, and the number of CDM groups that do not carry data is equal to the second preset value. Similarly, when the first preset value is the maximum number of receiving antennas or the maximum number of data streams supported by the terminal device, and the second preset value is the maximum number of CDM groups configured by the network device, the DCI does not include third indication information when the number of ports of the N first DMRS ports associated with the first signal is not less than the first preset value, or when the number of CDM groups that do not carry data is less than the second preset value.

[0227] For example, the first preset value is the maximum number of receiving antennas supported by the terminal device, and the first preset value is 3; the second preset value is the maximum number of CDM groups configured by the network device, and the second preset value is 4; the number of ports of the first DMRS port is 2; the number of CDM groups that do not carry data is 4; and the DCI includes the third indication information.

[0228] Based on the aforementioned condition that the DCI includes the third indication information, in S204, the terminal device determines whether the DCI includes the third indication information based on the number of ports of the N first demodulation reference signal (DMRS) ports associated with the first signal and / or the number of code division multiplexing (CDM) groups that do not carry data. This includes: when the number of ports of the N first DMRS ports associated with the first signal is less than a first preset value, and the number of CDM groups that do not carry data is not less than a second preset value, the terminal device determines that the DCI includes the third indication information; when the number of ports of the N first DMRS ports associated with the first signal is not less than the first preset value, or the number of CDM groups that do not carry data is less than the second preset value, the terminal device determines that the DCI does not include the third indication information. It is evident that the terminal device determines whether the DCI includes the third indication information under the corresponding conditions.

[0229] In S205, since the third indication information indicates one or more second DMRS ports, or one or more CDM groups corresponding to the second DMRS ports, when the terminal device includes the third indication information in the DCI, it processes the first signal according to the third indication information and N first DMRS ports. This includes: the terminal device demodulating the first signal according to the DMRS corresponding to the N first DMRS ports and the DMRS corresponding to one or more second DMRS ports; or, the terminal device demodulating the first signal according to the DMRS signals of the DMRS ports in the CDM groups corresponding to the N first DMRS ports and one or more second DMRS ports. Specifically, the terminal device estimates first channel information based on the DMRS corresponding to the N first DMRS ports, estimates second channel information based on the DMRS corresponding to one or more second DMRS ports, and then demodulates the first signal according to the first channel information and the second channel information to suppress interference signals.

[0230] In S205, when the terminal device does not include third indication information in the DCI, it processes the first signal according to N first DMRS ports, including: the terminal device determines one or more second DMRS ports according to the N first DMRS ports and the number of CDM groups that do not carry data; the terminal device demodulates the first signal according to the DMRS corresponding to the N first DMRS ports and the DMRS corresponding to one or more second DMRS ports.

[0231] For example, such as Figure 2 As shown, the DMRS ports assigned by the network device to the terminal device are DMRS port 0-DMRS port 5. The first DMRS ports associated with the first signal are DMRS port 0 and DMRS port 1. The second preset value is 3. The number of CDM groups that do not carry data is 2. Since the number of CDM groups that do not carry data is 2, and the first DMRS port that does not carry data is in CDM group 0, the second DMRS port that does not carry data can only be in CDM group 1. That is, DMRS port 2 and DMRS port 3 in CDM group 1 are the second DMRS ports.

[0232] In one implementation, the DCI includes second indication information, which indicates the number of N first DMRS ports and the number of CDM groups that do not carry data. It is evident that both the third and second indication information are carried within the same DCI, which can also reduce the signaling overhead of network devices.

[0233] As can be seen, in this embodiment, when the number of the N first DMRS ports associated with the first signal is less than a first preset value, and the number of CDM groups that do not carry data is not less than a second preset value, the DCI sent by the network device to the terminal device includes third indication information for indicating one or more second DMRS ports, or CDM groups corresponding to one or more second DMRS ports. This is beneficial for the terminal device to directly obtain the second DMRS port with strong interference, and then demodulate the first signal from the network device according to the second DMRS port and the first DMRS port, thereby suppressing the interference signal. This method helps reduce the processing complexity of terminal devices. When the number of the N first DMRS ports associated with the first signal is not less than a first preset value, or the number of CDM groups that do not carry data is less than a second preset value, the DCI sent by the network device to the terminal device does not include the third indication information, which can reduce the signaling overhead of the network device. At this time, the terminal device can also determine the second DMRS port with stronger interference based on the first DMRS port and the number of CDM groups that do not carry data, and then demodulate the first signal from the network device. This method can suppress interference signals while reducing the signaling overhead of the network device.

[0234] To further reduce the signaling overhead of network devices, based on signal transmission method 200, this application proposes another method such as... Figure 8 The signal transmission method 300 shown includes, but is not limited to, the following steps:

[0235] S301. The network device sends downlink control information (DCI) to the terminal device;

[0236] S302, The network device sends the first signal to the terminal device;

[0237] S303. The terminal device receives downlink control information (DCI); the DCI includes fourth indication information.

[0238] S304. The terminal device determines whether the DCI still includes the third instruction information based on the fourth instruction information;

[0239] S305. The terminal device receives the first signal from the network device;

[0240] S306. When the terminal device determines that the DCI includes third indication information, it processes the first signal according to the third indication information and N first DMRS ports; when it determines that the DCI does not include third indication information, it processes the first signal according to the N first DMRS ports associated with the first signal.

[0241] In S301, the DCI includes fourth indication information; when indicating the first state, the fourth indication information is used to indicate that the DCI includes third indication information; when the number of ports of the N first demodulation reference signal (DMRS) ports associated with the first signal is not less than a first preset value, and the number of code division multiplexing (CDM) groups that do not carry data is less than a second preset value, the network device determines that the fourth indication information indicates the first state; N is greater than or equal to 1; when the number of ports of the N first demodulation reference signal (DMRS) ports associated with the first signal is not less than the first preset value, or the number of code division multiplexing (CDM) groups that do not carry data is less than the second preset value, the network device determines that the fourth indication information indicates the second state.

[0242] In one implementation, the fourth indication information can indicate the first or second state via an index, as shown in Table 2:

[0243] Table 2

[0244] index content 0 First state 1 Second state

[0245] In Table 2, when the index is 0, it indicates that the fourth indication information is used to indicate the first state; when the index is 1, it indicates that the fourth indication information is used to indicate the second state.

[0246] In S304, since the fourth indication information is used to indicate that the DCI also includes the third indication information when indicating the first state, the terminal device determines whether the DCI also includes the third indication information based on the fourth indication information, including: when the terminal device determines that the fourth indication information indicates the first state, it determines that the DCI includes the third indication information; when the terminal device determines that the fourth indication information indicates the second state, it determines that the DCI does not include the third indication information.

[0247] In S306, when the terminal device includes third indication information in the DCI, the implementation method for processing the first signal according to the third indication information is the same as the relevant description in S205 above, and will not be described in detail again.

[0248] In S306, when the terminal device does not include third indication information in the DCI, the implementation method for processing the first signal according to the N first DMRS ports associated with the first signal is the same as the relevant description in S205 above, and will not be described in detail again.

[0249] In one implementation, the DCI includes second indication information, which indicates the number of N first DMRS ports and the number of CDM groups that do not carry data. It is evident that the third, fourth, and second indication information are all carried within the same DCI, which can also reduce the signaling overhead of network devices.

[0250] As can be seen, compared with signal transmission method 200, signal transmission method 300 uses a state mode with lower signaling overhead to indicate whether the terminal device's DCI includes a CDM group corresponding to one or more second DMRS ports, or one or more DMRS ports. This allows the terminal device to determine one or more second DMRS ports while reducing the signaling overhead of the network device, and then demodulate the first signal based on the one or more second DMRS ports.

[0251] The methods provided in the above embodiments of this application are described from the perspective of interaction between network devices and terminal devices. To implement the functions of the methods provided in the above embodiments of this application, the network devices and terminal devices may include hardware structures and / or software modules, implementing the above functions in the form of hardware structures, software modules, or a combination of hardware structures and software modules. Whether a particular function is executed in the form of hardware structures, software modules, or a combination of hardware structures and software modules depends on the specific application and design constraints of the technical solution.

[0252] Figure 9A schematic diagram of a communication device is provided. The communication device 900 can be a network device, a terminal device, a chip, chip system, or processor that supports the implementation of the above methods in a network device, or a chip, chip system, or processor that supports the implementation of the above methods in a terminal device. This device can be used to implement the methods described in the above method embodiments; for details, please refer to the descriptions in the above method embodiments.

[0253] The communication device 900 may include one or more processors 901. The processor 901 may be a general-purpose processor or a dedicated processor, such as a baseband processor or a central processing unit (CPU). The baseband processor can be used to process communication protocols and communication data, while the CPU can be used to control the communication device (e.g., base station, baseband chip, terminal, terminal chip, DU or CU, etc.), execute software programs, and process data from the software programs.

[0254] Optionally, the communication device 900 may include one or more memories 902, which may store instructions 904. These instructions can be executed on the processor 901, causing the communication device 900 to perform the methods described in the above method embodiments. Optionally, the memory 902 may also store data. The processor 901 and the memory 902 may be provided separately or integrated together.

[0255] Optionally, the communication device 900 may further include a transceiver 905 and an antenna 906. The transceiver 905 may be referred to as a transceiver unit, transceiver, or transceiver circuit, etc., and is used to implement the transmission and reception functions. The transceiver 905 may include a receiver and a transmitter. The receiver may be referred to as a receiver or receiving circuit, etc., and is used to implement the receiving function; the transmitter may be referred to as a transmitter or transmitting circuit, etc., and is used to implement the transmitting function.

[0256] The communication device 900 is a network device: the processor 901 is used to execute S101 in signal transmission method 100; execute S201 in signal transmission method 200; the transceiver 905 is used to execute S102 and S103 in signal transmission method 100; execute S202 and S203 in signal transmission method 200; execute S301 and S302 in signal transmission method 300.

[0257] The communication device 900 is a terminal device: transceiver 905 is used to execute S104 in signal transmission method 100; execute S204 in signal transmission method 200; execute S303 and S305 in signal transmission method 300; processor 901 is used to execute S105 in signal transmission method 100; execute S205 and S206 in signal transmission method 200; execute S305 and S306 in signal transmission method 300.

[0258] In another possible design, the processor 901 may include a transceiver for implementing receive and transmit functions. For example, the transceiver may be a transceiver circuit, an interface, or an interface circuit. The transceiver circuit, interface, or interface circuit for implementing receive and transmit functions may be separate or integrated. The aforementioned transceiver circuit, interface, or interface circuit may be used for reading and writing code / data, or for transmitting or relaying signals.

[0259] In another possible design, the processor 901 may optionally store instructions 903, which, when executed on the processor 901, cause the communication device 900 to perform the methods described in the above method embodiments. Instructions 903 may be embedded in the processor 901; in this case, the processor 901 may be implemented in hardware.

[0260] In another possible design, the communication device 900 may include circuitry that can perform the functions of sending, receiving, or communicating as described in the foregoing method embodiments. The processor and transceiver described in this application embodiment can be implemented on integrated circuits (ICs), analog ICs, radio frequency integrated circuits (RFICs), mixed-signal ICs, application-specific integrated circuits (ASICs), printed circuit boards (PCBs), electronic devices, etc. The processor and transceiver can also be manufactured using various IC process technologies, such as complementary metal oxide semiconductors (CMOS), n-metal-oxide-semiconductor (NMOS), positive channel metal oxide semiconductors (PMOS), bipolar junction transistors (BJTs), bipolar CMOS (BiCMOS), silicon germanium (SiGe), gallium arsenide (GaAs), etc.

[0261] The communication device described in the above embodiments may be a network device or a terminal, but the scope of the communication device described in the embodiments of this application is not limited thereto, and the structure of the communication device may vary. Figure 9 The communication device may be a standalone device or part of a larger device. For example, the communication device may be:

[0262] (1) Independent integrated circuit IC, or chip, or chip system or subsystem;

[0263] (2) A collection of one or more ICs, optionally including a storage component for storing data and instructions;

[0264] (3) ASIC, such as modem (MSM);

[0265] (4) Modules that can be embedded in other devices;

[0266] (4) Receivers, terminals, smart terminals, cellular phones, wireless devices, handheld devices, mobile units, vehicle-mounted devices, network devices, cloud devices, artificial intelligence devices, etc.

[0267] (5) Others, etc.

[0268] For cases where the communication device can be a chip or a chip system, please refer to [link / reference]. Figure 10 The diagram shows the structure of the chip. Figure 10 The chip 1000 shown includes a processor 1001 and an interface 1002. The number of processors 1001 can be one or more, and the number of interfaces 1002 can be multiple.

[0269] In one design, the chip is used to implement the functions of the terminal device in the embodiments of this application:

[0270] The interface 1002 is used to receive first indication information and second indication information from the network device;

[0271] The interface 1002 is also used to receive the first signal;

[0272] The processor 1001 is configured to process the first signal according to the first indication information and the second indication information; the first indication information is used to indicate one or more demodulation reference signal (DMRS) port sets, and the second indication information is used to indicate N first DMRS ports associated with the first signal; wherein N is greater than or equal to 1.

[0273] Optionally, the chip also includes a memory 1003, which is used to store the necessary program instructions and data of the terminal device.

[0274] In another design, regarding the case where the chip is used to implement the functions of the terminal device in the embodiments of this application:

[0275] The interface 1002 is used to receive downlink control information (DCI) from the network device;

[0276] The processor 1001 is configured to determine whether the DCI includes third indication information based on the number of ports of the N first demodulation reference signal (DMRS) ports associated with the first signal and / or the number of code division multiplexing (CDM) groups that do not carry data.

[0277] The interface 1002 is also used to receive the first signal from the network device;

[0278] The processor 1001 is further configured to process the first signal according to the third indication information and the N first DMRS ports when the DCI includes the third indication information; and to process the first signal according to the N first DMRS ports when the DCI does not include the third indication information.

[0279] Wherein, N is greater than or equal to 1; the third indication information is used to indicate one or more second DMRS ports, or, one or more second DMRS ports corresponding to CDM groups; the one or more second DMRS ports are different from the N first DMRS ports.

[0280] Optionally, the chip also includes a memory 1003, which is used to store the necessary program instructions and data of the terminal device.

[0281] In another design, regarding the use of the chip to implement the functions of the terminal device in the embodiments of this application:

[0282] The interface 1002 is used to receive downlink control information (DCI).

[0283] The processor 1001 is configured to determine, based on the fourth indication information in the DCI, whether the third indication information is also included in the DCI;

[0284] The interface 1002 is also used to receive a first signal from a network device;

[0285] The processor 1001 is further configured to process the first signal according to the third indication information when the DCI includes the third indication information; and to process the first signal according to N first DMRS ports associated with the first signal when the DCI does not include the third indication information; wherein N is greater than or equal to 1.

[0286] The DCI includes fourth indication information; the fourth indication information is used to indicate whether the DCI includes third indication information; the third indication information is used to indicate one or more second demodulation reference signal (DMRS) ports, or code division multiplexing (CDM) groups corresponding to one or more second DMRS ports; the one or more second DMRS ports are different from the N first DMRS ports associated with the first signal.

[0287] In one design, the chip is used to implement the functions of the network device in the embodiments of this application:

[0288] The processor 1001 is used to determine the first indication information and the second indication information;

[0289] The interface 1002 is used to send the first indication information and the second indication information to the terminal device;

[0290] The interface 1002 is also used to send a first signal to the terminal device.

[0291] Wherein, the first indication information is used to indicate one or more demodulation reference signal (DMRS) port sets, and the second indication information is used to indicate N first DMRS ports associated with the first signal; wherein N is greater than or equal to 1.

[0292] Optionally, the chip also includes a memory 1003, which is used to store the program instructions and data necessary for the network device.

[0293] In another design, regarding the case where the chip is used to implement the functions of the network device in the embodiments of this application:

[0294] The processor 1001 is used to determine the downlink control information (DCI).

[0295] The interface 1002 is used to send the DCI to the terminal device;

[0296] The interface 1002 is also used to send a first signal to the terminal device.

[0297] Wherein, when the number of ports of the N first DMRS ports associated with the first signal is less than a first preset value, and the number of CDM groups that do not carry data is not less than a second preset value, the DCI includes third indication information; the third indication information is used to indicate one or more second DMRS ports, or, one or more CDM groups corresponding to the second DMRS ports; the one or more second DMRS ports are different from the N first DMRS ports; and N is greater than or equal to 1.

[0298] Optionally, the chip also includes a memory 1003, which is used to store the program instructions and data necessary for the network device.

[0299] In another design, regarding the use of the chip to implement the functions of the network device in the embodiments of this application:

[0300] The interface 1002 is used to send downlink control information (DCI) to the terminal device.

[0301] The interface 1002 is also used to send a first signal to the terminal device.

[0302] The DCI includes fourth indication information; when indicating the first state, the fourth indication information is used to indicate that the DCI includes third indication information; the third indication information is used to indicate one or more second demodulation reference signal (DMRS) ports, or code division multiplexing (CDM) groups corresponding to one or more second demodulation reference signal (DMRS) ports; the one or more second DMRS ports are different from the N first DMRS ports associated with the first signal.

[0303] Optionally, the chip also includes a memory 1003, which is used to store the program instructions and data necessary for the network device.

[0304] Those skilled in the art will also understand that the various illustrative logical blocks and steps listed in the embodiments of this application can be implemented by electronic hardware, computer software, or a combination of both. Whether such functionality is implemented through hardware or software depends on the specific application and the overall system design requirements. Those skilled in the art can implement the described functionality using various methods for each specific application, but such implementation should not be construed as exceeding the scope of protection of the embodiments of this application.

[0305] The embodiments of this application and the method embodiments shown in signal transmission methods 100 to 300 are based on the same concept and have the same technical effects. For the specific principles, please refer to the description of the embodiments shown in signal transmission methods 100 to 300, which will not be repeated here.

[0306] like Figure 11 As shown, this application embodiment provides another communication device 1100. This communication device can be a terminal device or a component of a terminal device (e.g., an integrated circuit, a chip, etc.). Alternatively, the communication device can be a network device or a component of a network device (e.g., an integrated circuit, a chip, etc.). The communication device can also be other communication units used to implement the methods in the method embodiments of this application. The communication device 1100 may include a processing unit 1101. Optionally, it may also include a communication unit 1102 and a storage unit 1103.

[0307] In one possible design, such as Figure 11One or more units may be implemented by one or more processors, or by one or more processors and memory; or by one or more processors and transceivers; or by one or more processors, memory, and transceivers. This application does not limit the implementation in this way. The processors, memory, and transceivers can be configured individually or integrated.

[0308] The communication device is equipped with the functions of the terminal device or network device described in the embodiments of this application. For example, the communication device includes modules, units, or means corresponding to the steps involved in the terminal device described in the embodiments of this application. The functions, units, or means can be implemented by software, hardware, or hardware executing corresponding software, or a combination of software and hardware. Further details can be found in the corresponding descriptions in the foregoing method embodiments.

[0309] In one possible design, a communication device 1100 may include:

[0310] Communication unit 1102 is used to receive first indication information and second indication information from network device;

[0311] The communication unit 1102 is also configured to receive the first signal from the network device;

[0312] Processing unit 1101 is configured to process the first signal according to the first indication information and the second indication information;

[0313] The first indication information is used to indicate one or more demodulation reference signal (DMRS) port sets, and the second indication information is used to indicate N first DMRS ports associated with the first signal; N is greater than or equal to 1.

[0314] Optional implementation methods of this application can be found in the relevant content of the signal transmission method 110 described in the above method embodiments. They will not be detailed here.

[0315] In another possible design, a communication device 1100 may include:

[0316] Processing unit 1101 is used to determine the first indication information and the second indication information;

[0317] Communication unit 1102 is used to send the first indication information and the second indication information to the terminal device;

[0318] The communication unit 1102 is also used to send the first signal to the terminal device;

[0319] Wherein, the first indication information is used to indicate one or more demodulation reference signal (DMRS) port sets, and the second indication information is used to indicate N first DMRS ports associated with the first signal; wherein N is greater than or equal to 1.

[0320] Optional implementation methods of this application can be found in the relevant content of the signal transmission method 100 described in the above method embodiments. They will not be detailed here.

[0321] In another possible design, a communication device 1100 may include:

[0322] Communication unit 1102 is used to receive downlink control information (DCI) from network equipment;

[0323] Processing unit 1101 is used to determine whether the DCI includes third indication information based on the number of ports of the N first demodulation reference signal (DMRS) ports associated with the first signal and / or the number of code division multiplexing (CDM) groups that do not carry data, wherein N is greater than or equal to 1;

[0324] The communication unit 1102 is also configured to receive the first signal from the network device;

[0325] The processing unit 1101 is further configured to process the first signal according to the third indication information and the N first DMRS ports when the third indication information is included in the DCI; and to process the first signal according to the N first DMRS ports when the third indication information is not included in the DCI.

[0326] The third indication information is used to indicate one or more second DMRS ports, or CDM groups corresponding to one or more second DMRS ports; the one or more second DMRS ports are different from the N first DMRS ports.

[0327] Optional implementation methods of this application can be found in the relevant content of the signal transmission method 200 described in the above method embodiments. They will not be detailed here.

[0328] In another possible design, a communication device 1100 may include:

[0329] Processing unit 1101 is used to determine downlink control information (DCI), wherein when the number of ports of the N first DMRS ports associated with the first signal is less than a first preset value, and the number of CDM groups that do not carry data is not less than a second preset value, the DCI includes third indication information.

[0330] Communication unit 1102 is used to send the DCI to the terminal device;

[0331] The communication unit 1102 is also used to send a first signal to the terminal device;

[0332] The third indication information is used to indicate one or more second DMRS ports, or CDM groups corresponding to one or more second DMRS ports; the one or more second DMRS ports are different from the N first DMRS ports; and N is greater than or equal to 1.

[0333] Optional implementation methods of this application can be found in the relevant content of the signal transmission method 200 described in the above method embodiments. They will not be detailed here.

[0334] In another possible design, a communication device 1100 may include:

[0335] Communication unit 1102 is used to receive downlink control information (DCI);

[0336] Processing unit 1101 is used to determine whether the third indication information is also included in the DCI based on the fourth indication information in the DCI;

[0337] Communication unit 1102 is used to receive a first signal from the network device;

[0338] The processing unit 1101 is configured to process the first signal according to the third indication information when the DCI includes the third indication information; and to process the first signal according to N first DMRS ports associated with the first signal when the DCI does not include the third indication information; wherein N is greater than or equal to 1.

[0339] The DCI includes fourth indication information; the fourth indication information is used to indicate whether the DCI includes third indication information; the third indication information is used to indicate one or more second demodulation reference signal (DMRS) ports, or code division multiplexing (CDM) groups corresponding to one or more second DMRS ports; the one or more second DMRS ports are different from the N first DMRS ports associated with the first signal.

[0340] Optional implementation methods of this application can be found in the relevant content of the signal transmission method 300 described in the above method embodiments. They will not be detailed here.

[0341] In another possible design, a communication device 1100 may include:

[0342] Communication unit 1102 is used to send downlink control information (DCI) to terminal equipment;

[0343] The communication unit 1102 is also used to send a first signal to the terminal device.

[0344] The DCI includes fourth indication information; when indicating the first state, the fourth indication information is used to indicate that the DCI includes third indication information; the third indication information is used to indicate one or more second demodulation reference signal (DMRS) ports, or code division multiplexing (CDM) groups corresponding to one or more second demodulation reference signal (DMRS) ports; the one or more second DMRS ports are different from the N first DMRS ports associated with the first signal.

[0345] Optional implementation methods of this application can be found in the relevant content of the signal transmission method 300 described in the above method embodiments. They will not be detailed here.

[0346] The embodiments of this application and the method embodiments shown in signal transmission methods 100 to 300 are based on the same concept and have the same technical effects. For the specific principles, please refer to the description of the embodiments shown in signal transmission methods 100 to 300, which will not be repeated here.

[0347] It is understood that some optional features in the embodiments of this application can be implemented independently in certain scenarios without relying on other features, such as the current solution on which they are based, to solve the corresponding technical problems and achieve the corresponding effects. Alternatively, they can be combined with other features as needed in certain scenarios. Correspondingly, the communication device given in the embodiments of this application can also implement these features or functions, which will not be elaborated here.

[0348] Those skilled in the art will also understand that the various illustrative logical blocks and steps listed in the embodiments of this application can be implemented by electronic hardware, computer software, or a combination of both. Whether such functionality is implemented in hardware or software depends on the specific application and the overall system design requirements.

[0349] It should be understood that the processor in the embodiments of this application can be an integrated circuit chip with signal processing capabilities. In implementation, the steps of the above method embodiments can be completed by integrated logic circuits in the processor's hardware or by instructions in software form. The processor described above can be a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components.

[0350] It is understood that the memory in the embodiments of this application can be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory. The non-volatile memory can be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), or flash memory. The volatile memory can be random access memory (RAM), which is used as an external cache. By way of example, but not limitation, many forms of RAM are available, such as static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous linked dynamic random access memory (SLDRAM), and direct rambus RAM (DR RAM). It should be noted that the memory used in the systems and methods described herein is intended to include, but is not limited to, these and any other suitable types of memory.

[0351] This application also provides a computer-readable medium for storing computer software instructions that, when executed by a communication device, implement the method described in the first aspect above.

[0352] This application also provides a computer program product for storing computer software instructions, which, when executed by a communication device, implement the method described in the second aspect above.

[0353] This application also provides a computer program product for storing computer software instructions, which, when executed by a communication device, implement the method described in the third aspect above.

[0354] This application also provides a computer program product for storing computer software instructions, which, when executed by a communication device, implement the method described in the fourth aspect above.

[0355] This application also provides a computer program product for storing computer software instructions, which, when executed by a communication device, implement the method described in the fifth aspect above.

[0356] This application also provides a computer program product for storing computer software instructions, which, when executed by a communication device, implement the method described in the sixth aspect above.

[0357] In the above embodiments, implementation can be achieved, in whole or in part, through software, hardware, firmware, or any combination thereof. When implemented using software, it can be implemented, in whole or in part, as a computer program product. The computer program product includes one or more computer instructions. When the computer instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of this application are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, the computer instructions can be transmitted from one website, computer, server, or data center to another via wired (e.g., coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium accessible to a computer or a data storage device such as a server or data center that integrates one or more available media. The available media may be magnetic media (e.g., floppy disks, hard disks, magnetic tapes), optical media (e.g., high-density digital video discs (DVDs)), or semiconductor media (e.g., solid-state disks (SSDs)).

[0358] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A signal transmission method, characterized in that, The method is applied to a terminal device, and the method includes: Receive first and second indication information from the network device; The first indication information is used to indicate one or more demodulation reference signal (DMRS) port sets, and the second indication information is used to indicate N first DMRS ports associated with the first signal; the signals associated with the DMRS ports in the DMRS port set where the first DMRS ports are located have strong or weak correlations; the N is greater than or equal to 1; the one or more DMRS port sets are determined based on the configured DMRS ports and the first DMRS ports; The network device receives the first signal and determines one or more second DMRS ports based on the first indication information and the second indication information, wherein the one or more second DMRS ports are DMRS ports associated with interference signals of the first signal; The first signal is processed according to the DMRS corresponding to the N first DMRS ports and the DMRS corresponding to the one or more second DMRS ports.

2. The method according to claim 1, characterized in that, The DMRS ports in the DMRS port set where the first DMRS port is located are strongly correlated, including: the signals associated with the DMRS ports in the DMRS port set where the first DMRS port is located are strong interference signals to each other.

3. The method according to claim 1, characterized in that, The DMRS ports in the DMRS port set where the first DMRS port is located are strongly correlated, including that the signals associated with the DMRS ports in the DMRS port set where the first DMRS port is located do not interfere with each other.

4. The method according to claim 2, characterized in that, The one or more second DMRS ports belong to the same DMRS port set as the N first DMRS ports.

5. The method according to claim 3, The one or more second DMRS ports do not belong to the same DMRS port set as the N first DMRS ports.

6. The method according to any one of claims 1 to 5, characterized in that, The first indication information is carried in the group common downlink control information (DCI).

7. A signal transmission method, characterized in that, The method is applied to a network device, and the method includes: Determine the first instruction information and the second instruction information; The first indication information is used to indicate one or more demodulation reference signal (DMRS) port sets, and the second indication information is used to indicate N first DMRS ports associated with the first signal; the signals associated with the DMRS ports in the DMRS port set where the first DMRS ports are located have strong or weak correlations; the N is greater than or equal to 1; the one or more DMRS port sets are determined based on the configured DMRS ports and the first DMRS ports; Send the first instruction information and the second instruction information to the terminal device, and send the first signal to the terminal device.

8. The method according to claim 7, characterized in that, The DMRS ports in the DMRS port set where the first DMRS port is located are strongly correlated, including: the signals associated with the DMRS ports in the DMRS port set where the first DMRS port is located are strong interference signals to each other.

9. The method according to claim 7, characterized in that, The DMRS ports in the DMRS port set where the first DMRS port is located are strongly correlated, including that the signals associated with the DMRS ports in the DMRS port set where the first DMRS port is located do not interfere with each other.

10. The method according to any one of claims 7 to 9, characterized in that, The first indication information is carried in the group common downlink control information (DCI).

11. A communication device, characterized in that, The device is applied to a terminal device, and the device includes: a processor and a communication interface; The communication interface is used to receive first indication information and second indication information from a network device; the first indication information is used to indicate one or more demodulation reference signal (DMRS) port sets, and the second indication information is used to indicate N first DMRS ports associated with the first signal; the signals associated with the DMRS ports in the DMRS port set where the first DMRS ports are located have strong or weak correlations; the N is greater than or equal to 1; the one or more DMRS port sets are determined based on the configured DMRS ports and the first DMRS ports; The communication interface is also used to receive the first signal from the network device; The processor is configured to determine one or more second DMRS ports based on the first indication information and the second indication information, wherein the one or more second DMRS ports are DMRS ports associated with the interference signal of the first signal; The processor is further configured to process the first signal according to the DMRS corresponding to the N first DMRS ports and the DMRS corresponding to the one or more second DMRS ports.

12. The apparatus according to claim 11, characterized in that, The DMRS ports in the DMRS port set where the first DMRS port is located are strongly correlated, including: the signals associated with the DMRS ports in the DMRS port set where the first DMRS port is located are strong interference signals to each other.

13. The apparatus according to claim 11, characterized in that, The DMRS ports in the DMRS port set where the first DMRS port is located are strongly correlated, including that the signals associated with the DMRS ports in the DMRS port set where the first DMRS port is located do not interfere with each other.

14. The apparatus according to claim 12, characterized in that, The one or more second DMRS ports belong to the same DMRS port set as the N first DMRS ports.

15. The apparatus according to claim 13, characterized in that, The one or more second DMRS ports do not belong to the same DMRS port set as the N first DMRS ports.

16. The apparatus according to any one of claims 11 to 15, characterized in that, The first indication information is carried in the group common downlink control information (DCI).

17. A communication device, characterized in that, The device is applied to a network device, and the device includes: a processor and a communication interface; The processor is configured to determine first indication information and second indication information; the first indication information is configured to indicate one or more demodulation reference signal (DMRS) port sets, and the second indication information is configured to indicate N first DMRS ports associated with a first signal; the signals associated with the DMRS ports in the DMRS port set containing the first DMRS ports have strong or weak correlations; the N is greater than or equal to 1; the one or more DMRS port sets are determined based on configured DMRS ports and the first DMRS ports; The communication interface is used to send the first indication information and the second indication information to the terminal device, and to send the first signal to the terminal device.

18. The apparatus according to claim 17, characterized in that, The DMRS ports in the DMRS port set where the first DMRS port is located are strongly correlated, including: the signals associated with the DMRS ports in the DMRS port set where the first DMRS port is located are strong interference signals to each other.

19. The apparatus according to claim 17, characterized in that, The DMRS ports in the DMRS port set where the first DMRS port is located are strongly correlated, including that the signals associated with the DMRS ports in the DMRS port set where the first DMRS port is located do not interfere with each other.

20. The apparatus according to any one of claims 17 to 19, characterized in that, The first indication information is carried in the group common downlink control information (DCI).

21. A computer-readable storage medium storing a computer program comprising at least one piece of code, the at least one piece of code being executed by a communication device to control the communication device to perform the method of any one of claims 1 to 6, or to perform the method of any one of claims 7 to 10.

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