Method and device for transmitting information

Abstract

The present application provides a method and apparatus for transmitting information, the method comprising: a terminal device receives first configuration information sent by a network device, the first configuration information comprising first indication information, the first indication information being used to indicate a set of M control channel elements (CCEs) included in a first control resource set; determining a first candidate control channel, the first candidate control channel comprising K CCEs; determining a first target CCE set in the set of M CCEs; and receiving control information sent by the network device on the first candidate control channel according to a reference signal corresponding to the first target CCE set. This method achieves better channel estimation performance and improves the accuracy of channel estimation by dividing different DMRS bundles on a CORESET and using more DMRSs in the DMRS bundle for joint channel estimation.

Description

[0001] This application claims priority to the Chinese patent application filed with the State Intellectual Property Office on September 27, 2020, with application number 202011034717.X and application name “A Method for PDCCH Enhancement”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of communications, and more particularly, to a method and apparatus for transmitting information in the field of communications. Background Art

[0003] In an existing communication system composed of terminal devices and network devices, the terminal devices can perform channel estimation, measurement, tracking, etc. based on the reference signals sent by the network devices. Taking the demodulation reference signal (DMRS) as an example, the DMRS needs to undergo a precoding process before being sent, and the precoding granularity of the reference signal in the frequency domain can be configured through high-layer signaling. For example, it can be configured to use the same precoding within a resource element group bundle (REG bundle), which is called "narrowband precoding", or it can be configured to use the same precoding for all resource element groups (REG) in the frequency domain of the same control resource set (CORESET), which is called "wideband precoding".

[0004] In narrowband precoding scenarios, if a terminal device performs channel estimation based on the DMRS within a REG Bundle, this results in low channel estimation accuracy and reduced channel estimation performance. Improving the accuracy of channel estimation in narrowband precoding scenarios is an urgent issue that needs to be addressed. Summary of the Invention

[0005] The present application provides a method and apparatus for transmitting information. The method divides different DMRS bundles on a CORESET and uses all available DMRSs in a DMRS bundle for joint channel estimation, thereby improving the channel estimation performance and the accuracy of the channel estimation.

[0006] In a first aspect, a method for transmitting information is provided, characterized in that it includes: receiving first configuration information, the first configuration information including first indication information, the first indication information being used to indicate a set of M control channel elements CCE included in a first control resource set, where M is an integer greater than or equal to 1; determining a first candidate control channel, where the first candidate control channel includes K CCEs, where K is an integer greater than or equal to 1; determining a first target CCE set in which the K CCEs are located in the M CCE sets; and receiving control information sent by a network device on the first candidate control channel according to a reference signal corresponding to the first target CCE set.

[0007] Optionally, the "first control resource set" can be understood as a CORESET for the terminal device to blindly detect the PDCCH candidate, that is, a physical time-frequency resource. The CORESET occupies several RBs in the frequency domain and can occupy 1 to 3 symbols in the time domain.

[0008] It should be understood that in this embodiment of the present application, the "first indication information" is used to instruct the terminal device to divide several RBs occupied in the frequency domain into M CCE sets, each of which may include one or more CCEs. It should also be understood that in this embodiment of the present application, each CCE set may be referred to as a "reference signal bundle set (DMRS bundle)."

[0009] It should also be understood that in the embodiment of the present application, the first target CCE set may be one or more sets of the M CCE sets divided on the CORESET. Exemplarily, the first target CCE set may be any one of the M CCE sets, or the first target CCE set may be at least two CCE sets of the M CCE sets, which is not limited in the embodiment of the present application.

[0010] In one possible implementation, the first configuration information is control resource set configuration information. Optionally, the first configuration information can be implemented through a radio resource control (RRC) message, that is, the first indication information can be implemented by adding or reusing an indication field in the RRC message, which is not limited in this embodiment of the present application.

[0011] Through the above scheme, by dividing different DMRS bundles on the CORESET and using more DMRS in a DMRSbundle for joint channel estimation, the channel estimation performance is better and the accuracy of channel estimation is improved.

[0012] Optionally, the first indication information may include different contents, and the terminal device 102 may divide the first control resource set into M control channel element CCE sets according to the different contents included in the first indication information.

[0013] In a possible implementation, the first indication information includes frequency domain information, time domain information of the first control resource set, and number information N of CCEs included in each of the M CCE sets, where N is an integer greater than or equal to 1.

[0014] It should be understood that in the embodiment of the present application, each CCE set can be referred to as a "DMRS bundle", and the number of CCEs included in each CCE set, N, can be referred to as a "DMRS bundle size". Exemplarily, when the first indication information can include the frequency domain range of all CCEs in the CORESET, the time domain range of the CCEs (e.g., symbol 1-symbol 3), and the number of CCEs N included in each CCE set, the terminal device can start from the first CCE (CCE 0) and divide the CORESET in sequence according to the number of CCEs N.

[0015] It should also be understood that in the embodiments of the present application, the number N of CCEs included in each CCE set may be the same, or the number N of CCEs included in some CCE sets may be the same, or the number N of CCEs included in each CCE set may be different. The embodiments of the present application do not limit the value and number of N.

[0016] In another possible implementation manner, the first indication information includes index information of CCEs included in each CCE set in the M CCE sets.

[0017] Exemplarily, the first indication information includes CCE index information of each CCE set. For example, the first indication information indicates the index identifier of the CCE included in the DMRS bundle. After receiving the CCE index identifier, the terminal device divides the CORESET into different DMRS bundles.

[0018] In combination with the first aspect and the above-mentioned implementation methods, in some possible implementation methods, the first configuration information also includes second indication information, and the second indication information is used to indicate the precoding method of the reference signal corresponding to the M CCE sets, and the precoding method includes any one of the following situations: all reference signals corresponding to the M CCE sets use the same precoding; or the reference signal corresponding to each CCE set in the M CCE sets uses the same precoding; or the reference signal corresponding to each resource element bundle included in each CCE uses the same precoding.

[0019] It should be understood that the DMRS precoding method may include precoding granularity (precoder), or precoding codeword, etc. In the embodiment of the present application, the second indication information may only configure the precoding method, or only configure the precoding granularity, and will not specifically indicate the precoding codebook.

[0020] In combination with the first aspect and the above-mentioned implementation methods, in some possible implementation methods, receiving control information sent by the network device on the first candidate control channel according to the reference signal corresponding to the first target CCE set includes: determining, according to the precoding method, a target reference signal with the same precoding method as the reference signal corresponding to the K CCEs in the reference signal corresponding to the first target CCE set; and receiving the control information sent by the network device on the first candidate control channel according to the target reference signal.

[0021] Through the above scheme, in the specific channel estimation process, the terminal device can flexibly select the target reference signal according to the different precoding methods in the DMRS bundle, that is, select the target reference signal with the same precoding method as the reference signal on the first candidate control channel to be detected for channel estimation, thereby improving the flexibility of the terminal device's channel estimation process.

[0022] In combination with the first aspect and the above-mentioned implementation methods, in some possible implementation methods, the method also includes: receiving second configuration information, which is used to indicate a second target CCE set that has an association relationship with the first target CCE set; and receiving control information sent by the network device on the first candidate control channel based on the reference signal corresponding to the first target CCE set and the reference signal corresponding to the second target CCE set.

[0023] It should be understood that the second configuration information is used to configure the linkage relationship between different DMRS bundles on CORESETs associated with different SSs. The linkage relationship can be understood as a mapping relationship, that is, the base station can indicate more DMRS bundles to the terminal device so that the terminal device can perform joint channel estimation based on more DMRS.

[0024] In an embodiment of the present application, it is assumed that the terminal device needs to estimate the first candidate control channel, the DMRS bundle where the CCE included in the first candidate control channel is located is the first target CCE set, and another DMRS bundle that has a certain association relationship with the first target CCE set is the "second target CCE set" in the embodiment of the present application. The linkage relationship between the first target CCE set and the second target CCE set can be defined in a variety of different ways.

[0025] In a possible implementation, the second configuration information includes an offset between the first target CCE set and the second target CCE set, and the offset includes at least one of a time domain offset and a frequency domain offset.

[0026] In combination with the first aspect and the above implementation, in some possible implementations, the time domain offset is a time slot offset and / or a symbol offset, and the frequency domain offset is a CCE offset.

[0027] It should be understood that the first target CCE set and the second target CCE set may have the same frequency domain position and different time domain positions; or, the first target CCE set and the second target CCE set may have different frequency domain positions and the same time domain positions; or, the first target CCE set and the second target CCE set may have different frequency domain positions and time domain positions.

[0028] Specifically, the time domain information and frequency domain information of the first target CCE set are known. By configuring the slot and / or symbol number of the time domain offset, and / or the CCE number of the frequency domain offset of the first target CCE set and the second target CCE set in the second configuration information, the terminal device can determine the time domain information and frequency domain information of the second target CCE set, and then determine the second target CCE set.

[0029] In another possible implementation, the second configuration information includes a mapping relationship between the M CCE sets and L CCE sets, where the L CCE sets are CCE sets in a second control resource set, and the second control resource set and the first control resource set have different identifiers.

[0030] In combination with the first aspect and the above implementation manner, in some possible implementation manners, the second configuration information is search space configuration information.

[0031] In combination with the first aspect and the above implementation manner, in some possible implementation manners, the second configuration information is further used to indicate that the second target CCE set and the first target CCE set use the same precoding method and / or the same precoding.

[0032] Through the above method, before obtaining DCI, the terminal device can obtain the DMRS estimation channel matrix H1 corresponding to the first target CCE set, obtain the DMRS estimation channel matrix H2 corresponding to the second target CCE set, and then generate the channel matrix H based on H1 and H2, that is, use more DMRS for channel estimation, thereby improving the accuracy of channel estimation. In addition, during the specific channel estimation process, the terminal device can flexibly select the target reference signal based on the different precoding methods in the DMRS bundle, that is, select the target reference signal with the same precoding method as the reference signal on the first candidate control channel to be detected for channel estimation, thereby improving the flexibility of the terminal device's channel estimation process.

[0033] It should be understood that the second target CCE set and the first target CCE set can be used for scheduling different terminal devices, but only during channel estimation, the reference signal available in the second target CCE set is used for joint channel estimation, which will not be further described later.

[0034] In a second aspect, a method for transmitting information is provided, characterized in that it includes: sending first configuration information, the first configuration information includes first indication information, the first indication information is used to indicate a set of M control channel elements CCE included in a first control resource set, where M is an integer greater than or equal to 1; sending control information to a terminal device on a first candidate control channel, wherein the first candidate control channel includes K CCEs, the K CCEs are a subset of a first target CCE set in the M CCE set, and the first target CCE set adopts the same precoding method as a reference signal corresponding to the first candidate control channel, and K is an integer greater than or equal to 1.

[0035] In combination with the second aspect, in some possible implementations, the first indication information includes frequency domain information, time domain information of the first control resource set, and the number information N of CCEs included in each CCE set in the M CCE sets, where N is an integer greater than or equal to 1.

[0036] In combination with the second aspect and the above implementation manner, in some possible implementation manners, the first indication information includes index information of the CCEs included in each CCE set in the M CCE sets.

[0037] In combination with the second aspect and the above-mentioned implementation methods, in some possible implementation methods, the first configuration information also includes second indication information, and the second indication information is used to indicate the precoding method of the reference signal corresponding to the M CCE sets, and the precoding method includes any one of the following situations: all reference signals corresponding to the M CCE sets use the same precoding; or the reference signal corresponding to each CCE set in the M CCE sets uses the same precoding; or the reference signal corresponding to each resource element bundle included in each CCE uses the same precoding.

[0038] In combination with the second aspect and the above implementations, in some possible implementations, the first target CCE set uses the same precoding method as the reference signal corresponding to the first candidate control channel.

[0039] In combination with the second aspect and the above-mentioned implementation methods, in some possible implementation methods, the method also includes: sending second configuration information, wherein the second configuration information is used to indicate a second target CCE set that has an association relationship with the first target CCE set, and the second target CCE set adopts the same precoding method as the reference signal corresponding to the first candidate control channel.

[0040] In combination with the second aspect and the above-mentioned implementation, in some possible implementations, the second configuration information includes an offset between the first target CCE set and the second target CCE set, and the offset includes at least one of a time domain offset and a frequency domain offset.

[0041] In combination with the second aspect and the above implementation, in some possible implementations, the time domain offset is a time slot offset and / or a symbol offset, and the frequency domain offset is a CCE offset.

[0042] In combination with the second aspect and the above-mentioned implementation methods, in some possible implementation methods, the second configuration information includes a mapping relationship between the M CCE sets and the L CCE sets, the L CCE sets are CCE sets in the second control resource set, and the second control resource set and the first control resource set have different identifiers.

[0043] In combination with the second aspect and the above implementation manner, in some possible implementation manners, the second configuration information is search space configuration information.

[0044] In combination with the second aspect and the above implementation, in some possible implementations, the second configuration information is further used to indicate that the second target CCE set and the first target CCE set use the same precoding method and / or the same precoding.

[0045] In combination with the second aspect and the above implementation manner, in some possible implementation manners, the first configuration information is control resource set configuration information.

[0046] Through the above solution, the network device instructs the terminal device to divide different DMRS bundles on the CORESET and use more DMRS within a DMRS bundle for joint channel estimation, which improves channel estimation performance and accuracy. In addition, during the specific channel estimation process, the terminal device can flexibly select the target reference signal based on the different precoding schemes in the DMRS bundle. In other words, the target reference signal with the same precoding scheme as the reference signal on the first candidate control channel to be detected is selected for channel estimation, which improves the flexibility of the terminal device's channel estimation process.

[0047] According to a third aspect, a device for transmitting information is provided, characterized in that it includes: a receiving unit for receiving first configuration information, the first configuration information including first indication information, the first indication information being used to indicate a set of M control channel elements CCE included in a first control resource set, where M is an integer greater than or equal to 1; a processing unit for determining a first candidate control channel, where the first candidate control channel includes K CCEs, where K is an integer greater than or equal to 1; and determining a first target CCE set in which the K CCEs are located in the set of M CCEs; the receiving unit is further used to receive control information sent by a network device on the first candidate control channel according to a reference signal corresponding to the first target CCE set.

[0048] In combination with the third aspect, in some possible implementations, the first indication information includes frequency domain information, time domain information of the first control resource set, and the number information N of CCEs included in each CCE set in the M CCE sets, where N is an integer greater than or equal to 1.

[0049] In combination with the third aspect and the above implementation manner, in some possible implementation manners, the first indication information includes index information of the CCEs included in each CCE set in the M CCE sets.

[0050] In combination with the third aspect and the above-mentioned implementation methods, in some possible implementation methods, the first configuration information also includes second indication information, and the second indication information is used to indicate the precoding method of the reference signal corresponding to the M CCE sets, and the precoding method includes any one of the following situations: all reference signals corresponding to the M CCE sets use the same precoding; or the reference signal corresponding to each CCE set in the M CCE sets uses the same precoding; or the reference signal corresponding to each resource element bundle included in each CCE uses the same precoding.

[0051] In combination with the third aspect and the above-mentioned implementation methods, in some possible implementation methods, the processing unit is also used to: determine, according to the precoding method, a target reference signal in the reference signal corresponding to the first target CCE set with the same precoding method as the reference signal corresponding to the K CCEs; and the receiving unit is also used to receive the control information sent by the network device on the first candidate control channel according to the target reference signal.

[0052] In combination with the third aspect and the above-mentioned implementation methods, in some possible implementation methods, the receiving unit is also used to receive second configuration information, where the second configuration information is used to indicate a second target CCE set that has an association relationship with the first target CCE set; and based on the reference signal corresponding to the first target CCE set and the reference signal corresponding to the second target CCE set, receive the control information sent by the network device on the first candidate control channel.

[0053] In combination with the third aspect and the above-mentioned implementation, in some possible implementations, the second configuration information includes an offset between the first target CCE set and the second target CCE set, and the offset includes at least one of a time domain offset and a frequency domain offset.

[0054] In combination with the third aspect and the above implementation, in some possible implementations, the time domain offset is a time slot offset and / or a symbol offset, and the frequency domain offset is a CCE offset.

[0055] In combination with the third aspect and the above-mentioned implementation methods, in some possible implementation methods, the second configuration information includes a mapping relationship between the M CCE sets and the L CCE sets, the L CCE sets are CCE sets in the second control resource set, and the second control resource set and the first control resource set have different identifiers.

[0056] In combination with the third aspect and the above implementations, in some possible implementations, the second configuration information is search space configuration information.

[0057] In combination with the third aspect and the above implementation, in some possible implementations, the second configuration information is further used to indicate that the second target CCE set and the first target CCE set use the same precoding method and / or the same precoding.

[0058] In combination with the third aspect and the above implementations, in some possible implementations, the first configuration information is control resource set configuration information.

[0059] In a fourth aspect, a device for transmitting information is provided, characterized in that it includes: a first sending unit for sending first configuration information, the first configuration information including first indication information, the first indication information being used to indicate a set of M control channel elements CCE included in a first control resource set, where M is an integer greater than or equal to 1; a second sending unit for sending control information to a terminal device on a first candidate control channel, wherein the first candidate control channel includes K CCEs, which are a subset of a first target CCE set in the M CCE set, and the first target CCE set adopts the same precoding method as the reference signal corresponding to the first candidate control channel, and K is an integer greater than or equal to 1.

[0060] In combination with the fourth aspect, in some possible implementations, the first indication information includes frequency domain information, time domain information of the first control resource set, and the number information N of CCEs included in each CCE set in the M CCE sets, where N is an integer greater than or equal to 1.

[0061] In combination with the fourth aspect and the above implementation manner, in some possible implementation manners, the first indication information includes index information of the CCEs included in each CCE set in the M CCE sets.

[0062] In combination with the fourth aspect and the above-mentioned implementation methods, in some possible implementation methods, the first configuration information also includes second indication information, and the second indication information is used to indicate the precoding method of the reference signal corresponding to the M CCE sets, and the precoding method includes any one of the following situations: all reference signals corresponding to the M CCE sets use the same precoding; or the reference signal corresponding to each CCE set in the M CCE sets uses the same precoding; or the reference signal corresponding to each resource element bundle included in each CCE uses the same precoding.

[0063] In combination with the fourth aspect and the above implementations, in some possible implementations, the first target CCE set uses the same precoding method as the reference signal corresponding to the first candidate control channel.

[0064] In combination with the fourth aspect and the above-mentioned implementation methods, in some possible implementation methods, the first sending unit is also used to send second configuration information, and the second configuration information is used to indicate a second target CCE set that has an association relationship with the first target CCE set, and the second target CCE set adopts the same precoding method as the reference signal corresponding to the first candidate control channel.

[0065] In combination with the fourth aspect and the above-mentioned implementation methods, in some possible implementation methods, the second configuration information includes an offset between the first target CCE set and the second target CCE set, and the offset includes at least one of a time domain offset and a frequency domain offset.

[0066] In combination with the fourth aspect and the above-mentioned implementation manner, in some possible implementation manners, the time domain offset is a time slot offset and / or a symbol offset, and the frequency domain offset is a CCE offset.

[0067] In combination with the fourth aspect and the above-mentioned implementation methods, in some possible implementation methods, the second configuration information includes a mapping relationship between the M CCE sets and the L CCE sets, the L CCE sets are CCE sets in the second control resource set, and the second control resource set and the first control resource set have different identifiers.

[0068] In combination with the fourth aspect and the above implementations, in some possible implementations, the second configuration information is search space configuration information.

[0069] In combination with the fourth aspect and the above-mentioned implementation manner, in some possible implementation manners, the second configuration information is further used to indicate that the second target CCE set and the first target CCE set adopt the same precoding method and / or the same precoding.

[0070] In combination with the fourth aspect and the above implementations, in some possible implementations, the first configuration information is control resource set configuration information.

[0071] In a fifth aspect, a communication device is provided, which has the functions of a terminal device implemented in the method design of the first aspect. These functions can be implemented through hardware or through hardware executing corresponding software. The hardware or software includes one or more units corresponding to the above functions.

[0072] In a sixth aspect, a communication device is provided, which has the functions of a network device (e.g., a base station) implemented in the method design of the second aspect. These functions can be implemented by hardware or by hardware executing corresponding software. The hardware or software includes one or more units corresponding to the above functions.

[0073] In a seventh aspect, a terminal device is provided, comprising a transceiver and a processor. Optionally, the terminal device further comprises a memory. The processor is configured to control the transceiver to transmit and receive signals, the memory is configured to store a computer program, and the processor is configured to retrieve and execute the computer program from the memory, so that the terminal device performs the method of the first aspect or any possible implementation of the first aspect.

[0074] In an eighth aspect, a network device is provided, comprising a transceiver and a processor. Optionally, the network device further comprises a memory. The processor is configured to control the transceiver to transmit and receive signals, the memory is configured to store a computer program, and the processor is configured to retrieve and execute the computer program from the memory, so that the network device performs the method of the second aspect or any possible implementation of the second aspect.

[0075] In a ninth aspect, a communication system is provided, which includes the terminal device of the third aspect and the network device of the fourth aspect.

[0076] In a tenth aspect, a communication device is provided. This communication device may be a terminal device designed in the above-mentioned method, or a chip provided in the terminal device. The communication device includes: a processor coupled to a memory, configured to execute instructions in the memory to implement the method performed by the terminal device in the above-mentioned first aspect or any possible implementation of the first aspect. Optionally, the communication device also includes a memory. Optionally, the communication device also includes a communication interface, and the processor is coupled to the communication interface.

[0077] When the communication device is a terminal device, the communication interface may be a transceiver, or an input / output interface.

[0078] When the communication device is a chip configured in a terminal device, the communication interface may be an input / output interface.

[0079] Optionally, the transceiver may be a transceiver circuit. Optionally, the input / output interface may be an input / output circuit.

[0080] In an eleventh aspect, a communication device is provided. This communication device may be the network device described in the above method, or a chip provided in the network device. The communication device includes a processor coupled to a memory and configured to execute instructions in the memory to implement the method performed by the network device in the above second aspect or any possible implementation of the second aspect. Optionally, the communication device also includes a memory. Optionally, the communication device also includes a communication interface, the processor coupled to the communication interface.

[0081] When the communication device is a network device, the communication interface may be a transceiver, or an input / output interface.

[0082] When the communication device is a chip configured in a network device, the communication interface may be an input / output interface.

[0083] Optionally, the transceiver may be a transceiver circuit. Optionally, the input / output interface may be an input / output circuit.

[0084] In a twelfth aspect, a computer program product is provided, comprising: a computer program code, which enables the computer to execute the methods in the above aspects when the computer program code is run on a computer.

[0085] In a thirteenth aspect, a computer-readable storage medium is provided, wherein the computer-readable storage medium stores a program code, and when the computer program code is run on a computer, the computer executes the methods in the above aspects. BRIEF DESCRIPTION OF THE DRAWINGS

[0086] Figure 1 Schematic diagram of the architecture of a mobile communication system applicable to an embodiment of the present application.

[0087] Figure 2 This is a diagram of an example of REG and REG bundle.

[0088] Figure 3 This is a diagram showing the mapping between CCE and REG.

[0089] Figure 4 This is a schematic diagram of resources carrying DMRS.

[0090] Figure 5 This is a schematic diagram of DMRS coding.

[0091] Figure 6 This is a schematic interactive diagram of an example of a method for transmitting information provided in an embodiment of the present application.

[0092] Figure 7 This is a schematic diagram of the division of a control resource set provided in an embodiment of the present application.

[0093] Figure 8 This is another example of a division diagram of a control resource set provided in an embodiment of the present application.

[0094] Figure 9 This is another example of a division diagram of a control resource set provided in an embodiment of the present application.

[0095] Figure 10 This is a schematic interaction diagram of another example of a method for transmitting information provided in an embodiment of the present application.

[0096] Figure 11 This is another example of a division diagram of a control resource set provided in an embodiment of the present application.

[0097] Figure 12 This is another example of a division diagram of a control resource set provided in an embodiment of the present application.

[0098] Figure 13This is another example of a division diagram of a control resource set provided in an embodiment of the present application.

[0099] Figure 14 This is another example of a division diagram of a control resource set provided in an embodiment of the present application.

[0100] Figure 15 This is a schematic block diagram of an example of a device for determining resources according to an embodiment of the present application.

[0101] Figure 16 This is a schematic block diagram of another example of a device for determining resources according to an embodiment of the present application.

[0102] Figure 17 This is a structural diagram of a terminal device provided in an embodiment of the present application.

[0103] Figure 18 This is a structural diagram of a network device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0104] The technical solution in this application will be described below with reference to the accompanying drawings.

[0105] The technical solutions of the embodiments of the present application can be applied to various communication systems, such as: long term evolution (LTE) system, LTE frequency division duplex (FDD) system, LTE time division duplex (TDD) system, fifth generation (5G) mobile communication system or new radio (NR) communication system and future mobile communication systems.

[0106] Figure 1 Schematic diagram of the architecture of a mobile communication system applicable to the embodiment of the present application. Figure 1 As shown, the wireless communication system may include at least one network device 101, the network device 101 and one or more terminal devices (eg Figure 1 102 and 103) are used to communicate with each other. When the network device sends a signal, the network device is the transmitter and the terminal device is the receiver. Conversely, when the terminal device sends a signal, the terminal device is the transmitter and the network device is the receiver.

[0107] Terminal devices can be fixed in location or mobile. Figure 1 This is just a schematic diagram. The communication system may also include other network devices, such as wireless relay devices and wireless backhaul devices. Figure 1The embodiments of the present application do not limit the types and quantities of network devices and terminal devices included in the mobile communication system.

[0108] In a mobile communication system 100, a terminal device wirelessly accesses a network device in the mobile communication system. The network device 101 may be a base station, an evolved node B (eNB), a home base station, an access point (AP) in a wireless fidelity (WIFI) system, a wireless relay node, a wireless backhaul node, a transmission point (TP), or a transmission and reception point (TRP), etc. It may also be a gNB in an NR system, or it may be a component or part of a base station, such as a central unit (CU), a distributed unit (DU), or a baseband unit (BBU). It should be understood that in the embodiments of the present application, the specific technology and specific device form used by the network device are not limited. In this application, unless otherwise specified, the network device in this application refers to a radio access network device. In this application, the network device may refer to the network device itself or a chip used in the network device to perform wireless communication processing functions.

[0109] The terminal device in the mobile communication system 100 may also be referred to as a terminal, user equipment (UE), mobile station (MS), mobile terminal (MT), etc. The terminal device in the embodiment of the present application may be a mobile phone, a tablet computer (Pad), a computer with wireless transceiver function, or a wireless terminal used in scenarios such as virtual reality (VR), augmented reality (AR), industrial control (industrial control), self-driving, remote medical, smart grid, transportation safety, smart city, and smart home. In this application, the aforementioned terminal devices and chips applicable to the aforementioned terminal devices are collectively referred to as terminal devices. It should be understood that the embodiments of the present application do not limit the specific technology and specific device form adopted by the terminal devices.

[0110] The embodiments of the present application can be applied to downlink data transmission, uplink data transmission, and device-to-device (D2D) data transmission. For downlink data transmission, the data sending device is a network device, and the data receiving device is a terminal device. After the terminal device receives the downlink data, it will send feedback information to the network device to notify the network device whether the downlink data is correctly received by the terminal device. For uplink data transmission, the data sending device is a terminal device, and the data receiving device is a network device. After the network device receives the uplink data, it will send feedback information to the terminal device to notify the terminal device whether the uplink data is correctly received by the network device. For D2D signal transmission, the data sending device is a terminal device, and the data receiving device is also a terminal device. The embodiments of the present application do not limit the direction of data transmission.

[0111] It should be understood that the methods, situations, categories and divisions of the embodiments in the present application are only for the convenience of description and should not constitute special limitations. The features of various methods, categories, situations and embodiments can be combined without contradiction.

[0112] It should also be understood that the terms "first," "second," and "third" in the embodiments of this application are for distinction purposes only and should not constitute any limitation on this application. For example, the "first configuration information" and "second configuration information" in the embodiments of this application represent different configuration information sent by the base station to the terminal device; for another example, the "first indication information" and "second indication information" in the embodiments of this application represent information containing different content or different functions.

[0113] It should also be understood that in the various embodiments of the present application, the size of the serial number of each process does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0114] It should also be noted that in the embodiments of the present application, "pre-setting" and "pre-definition" can be achieved by pre-saving corresponding codes, tables or other methods that can be used to indicate relevant information in devices (for example, including terminal devices and network devices). For example, the predefined time slot style in the embodiments of the present application can be the time slot configuration method specified in the standard, and the present application does not limit its specific implementation method.

[0115] It should also be noted that "and / or" describes the relationship between associated objects, indicating that three possible relationships exist. For example, "A and / or B" can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. The character " / " generally indicates that the associated objects are in an "or" relationship. The technical solutions provided by this application will be described in detail below with reference to the accompanying drawings.

[0116] To facilitate understanding of the embodiments of the present application, several concepts involved in the present application are briefly introduced below.

[0117] 1. Time slot and time domain symbol

[0118] A time slot can be understood as a specific "time unit" or "time interval".

[0119] In the embodiments of the present application, the symbol is also called a time domain symbol, which can be an orthogonal frequency division multiplexing (OFDM) symbol or a single carrier frequency division multiple access (SC-FDMA) symbol, where SC-FDMA is also called orthogonal frequency division multiplexing with transform precoding (OFDM with TP), which is not limited in the embodiments of the present application.

[0120] For example, for the NR frequency division duplex (FDD) mode frame structure, the frame length is 10ms, each frame contains 10 subframes, and taking a 30kHz subcarrier as an example, each frame contains 20 time slots. Each subframe has two time slots, each time slot is 0.5ms and contains 14 OFDM symbols. Each NR time slot can have several resource blocks, and each resource block contains multiple subcarriers.

[0121] For the frame structure of the NR time division duplex (TDD) mode, the length of a frame is 10ms, including 10 subframes of 1ms in length. Taking a 30KHz subcarrier as an example, each frame contains 20 time slots. Each subframe has two time slots, each time slot is 0.5ms and contains 14 OFDM symbols. Therefore, the entire 10ms frame can be understood as being divided into several time slots as the unit of data scheduling and transmission - the transmission time interval (TTI). It should be understood that the embodiments of the present application do not limit the frame structure.

[0122] It should be understood that for different carriers in NR, different carriers may correspond to different reference subcarrier spacings (SCS), for example, SCS is 15KHz, 30KHz and 60KHz. For different reference subcarrier spacings, a subframe includes different number of time slots. For a carrier with an SCS of 15KHz, each subframe may include 1 time slot; for a carrier with an SCS of 30KHz, each subframe may include 2 time slots; for a carrier with an SCS of 60KHz, each subframe may include 4 time slots. Among them, for carriers with different SCSs, each time slot may include 14 symbols, which will not be repeated here.

[0123] 2. Physical Resource Block

[0124] A physical resource block (PRB) may occupy 12 consecutive subcarriers in the frequency domain.

[0125] 3. Control resource collection

[0126] In current standards, terminal devices blindly detect the physical downlink control channel (PDCCH) within a control resource set (CORESET). A CORESET can be understood as a block of physical time-frequency resources, occupying several PRBs in the frequency domain and several symbols in the time domain. In existing technologies, a CORESET occupies 1 to 3 symbols in the time domain.

[0127] In the introduction of the embodiment of the present application, the number of 3 symbols occupied by a CORESET in the time domain will be used as an example for explanation.

[0128] 4. Resource unit group and resource unit group bundling

[0129] A resource element group (REG) occupies P consecutive subcarriers in the frequency domain and Q consecutive OFDM symbols in the time domain. P is a natural number greater than 1. For example, a resource element group may occupy 12 consecutive subcarriers in the frequency domain and 1 OFDM symbol in the time domain, where P = 12 and Q = 1.

[0130] Within a CORESET, a resource block (RB) on each symbol is called a resource element group (REG). Several REGs form a resource element group bundle (REG bundle), also known as a "REG bundle." A REG bundle can include two, three, or six REGs. It should be understood that REG and REG bundle are physical concepts.

[0131] Figure 2 This is a diagram of a REG and a REG bundle. Figure 2 As shown in Figure (a), taking the three symbols occupied by a CORESET in the time domain as an example, the shaded REG bundle 1 may include 6 REGs, and REG bundle 2 may include 3 REGs. Or, as Figure 2 As shown in Figure (b), taking the number of 2 symbols occupied by a CORESET in the time domain as an example, REG bundle 3 may include 6 REGs, and REG bundle 4 may include 2 REGs.

[0132] It should be understood that Figure 2 This is just a possible diagram. Within the same CORESET, the size of the REG bundle is fixed. For example, Figure 2 In Figure (a), in the same CORESET, REG bundle 1 only includes 6 REGs or REG bundle 2 only includes 6 REGs, which is not limited in this embodiment of the present application.

[0133] 5. Candidate control channels

[0134] A PDCCH candidate may be composed of one or more consecutive control channel elements (CCEs), and multiple PDCCH candidates may constitute a candidate control channel set.

[0135] 6. Search Space

[0136] In NR, a terminal device monitors a set of candidate control channels in a non-DRX time slot. The set of candidate control channels is called the search space (SS) of the terminal device.

[0137] The base station sends search space configuration information to the terminal device. The terminal device can perform blind detection and decode PDCCH in the entire search space based on the search space configuration information. The search space used by each terminal device to blindly detect PDCCH is associated with a specific CORESET. The search space configuration information indicates the period and resource information of the CORESET, and specifies how the terminal device searches for candidate PDCCH sets and the location of the search candidate PDCCH sets.

[0138] For example, each search space (SS) can be associated with a CORESET ID, and different search space configuration information in the NR can be implemented through high-layer parameter signaling. For example, the search space configuration information may include: the symbol position of the PDCCH listening, the number of PDCCH candidates for blind detection at each CCE level, the downlink control information (DCI) format for blind detection of the search space, etc.

[0139] Specifically, when the terminal device blindly detects the PDCCH in the CORESET, it actually monitors several PDCCH candidates in the CORESET, that is, the terminal device detects whether there is a PDCCH sent to itself on each PDCCHcandidate among the several PDCCH candidates.

[0140] 7. Aggregation Level

[0141] The aggregation level (AL) can be understood as the number of CCEs included in the candidate control channel, that is, one PDCCH candidate occupies K consecutive CCEs, where K is the aggregation level of the PDCCH candidate.

[0142] If the number of CCEs included in a candidate control channel (PDCCH candidate) is K, the aggregation level of the candidate control channel is called K, where K is a positive integer greater than or equal to 1, for example, the value of K can be 1, 2, 4, 8, or 16. For example, if a PDCCH candidate occupies 4 consecutive CCEs, it means that the aggregation level of the PDCCH candidate is 4.

[0143] 8. Mapping between CCE and REG

[0144] As mentioned above Figure 2 As described in [1], REG is a physical concept, while CCE is a logical concept. The CCE concept facilitates the definition of PDCCH candidates. However, PDCCHs ultimately occupy some physical resources, so a mapping relationship is required between the logical concept of CCE and the physical concept of REG bundle.

[0145] Specifically, one CCE can correspond to six REGs. Furthermore, a REG bundle can contain two, three, or six REGs, so one CCE may correspond to three, two, or one REG bundle. Specifically, the REG bundle included in CCE j is {f(6j / L), f(6j / L+1), ..., f(6j / L+1 / L-1)}, where L is the REG bundle size, i.e., the number of REGs included in the REG bundle.

[0146] Figure 3 This is a diagram showing the mapping of CCE and REG. Figure 3 As shown in Figure (a), take one CCE corresponding to two REGbundles, and one REG bundle including three REGs as an example. Figure 3 Figure (a) shows CCE 0 to CCE 5. If the AL of the PDCCH candidate detected by the terminal device is 2, then Figure 3 In FIG. 5( a ), CCE 0 and CCE 1 shown in shadow constitute a PDCCH candidate.

[0147] In the process of mapping CCE to REG, there are two mapping modes: non-interleaved mapping and interleaved mapping. For CCE 0 and CCE 1, a PDCCH candidate with AL=2 is formed. Figure 3 Figure (a) shows the non-interleaved mapping method. Figure 3 Figure (b) shows the interleaving mapping method, which will not be described in detail here.

[0148] 9. Channel Estimation

[0149] In the embodiment of the present application, a demodulation reference signal (DMRS) is taken as an example to introduce a process in which a terminal device performs channel estimation using the DMRS.

[0150] Specifically, before obtaining DCI, the terminal device can first obtain the DMRS corresponding to the candidate control channel (PDCCH candidate), and the terminal device can use the DMRS to demodulate the candidate control channel (PDCCH candidate). For example, the terminal device can use the DMRS to estimate the channel estimation value (or "channel matrix") of the channel state on the time-frequency resource where the candidate control channel (PDCCH candidate) is located, and then demodulate the candidate control channel (PDCCH candidate) to accurately receive DCI.

[0151] Figure 4 This is a diagram of resources carrying DMRS. Figure 4 As shown in Figure (a), for CCE 0, it can include REG bundle 0 and REG bundle 1, and REG bundle 0 and REG bundle 1 respectively include 3 REGs, for example, REGbundle 0 includes REG 0, REG 1 and REG 2, and REG bundle 1 includes REG 3, REG 4 and REG 5.

[0152] like Figure 4 As shown in Figure (b), taking REG 5 as an example, one REG represents one symbol in the time domain and one RB in the frequency domain. One RB contains 12 REs, of which the three REs shown in the shaded area can be used to carry DMRS. The terminal device can use DMRS for channel estimation. Specifically, DMRS can be generated according to the following formula (1):

[0153]

[0154] The scrambling code ID may be configured via UE-level high-layer signaling or cell-level configuration, which is not limited in this embodiment of the present application. Furthermore, the DMRS undergoes a precoding process before transmission, and the precoding granularity of the DMRS in the frequency domain, such as narrowband precoding or wideband precoding, may be configured via high-layer signaling.

[0155] For example, Figure 5 This is a schematic diagram of DMRS coding. Figure 3 Two scenarios of non-interleaved mapping and interleaved mapping are shown. Figure 5 The schematic diagram of narrowband precoding is shown as an example, where 1, 2, 3, and 4 represent different precoding codewords. The same precoding can be used within a REG bundle. For example, Figure 5As shown in Figure (a), for REG bundle 0 included in CCE 0, precoding codeword 1 is used, and REG bundle 1 uses precoding codeword 2; for REG bundle 2 included in CCE 1, precoding codeword 3 is used, and REG bundle 3 uses precoding codeword 4. Or, for the interleaved mapping scenario, such as Figure 5 As shown in Figure (b), REG bundle 0 included in CCE 0 adopts precoding codeword 1, and REG bundle 6 adopts precoding codeword 2; REG bundle 1 included in CCE 1 adopts precoding codeword 3, and REG bundle 7 adopts precoding codeword 4, which will not be repeated here.

[0156] As introduced in the background technology section, Figure 5 In the narrowband precoding scenario described in

[15] , when a terminal device performs channel estimation based on DMRS, if channel estimation is performed based on the DMRS within a REG Bundle, the accuracy of the channel estimation is low, that is, the performance of the channel estimation is degraded.

[0157] Furthermore, to support the high data rates, low latency, and high reliability characteristics of NR systems, NR terminal devices require high capabilities. For example, in common commercial frequency bands, NR terminal devices must support four-antenna reception and a 100MHz system bandwidth. These requirements result in high hardware costs for NR terminal devices. To further expand the NR market and reduce terminal device hardware costs, methods such as reducing the number of antennas or antenna size can be used to reduce terminal device complexity and hardware costs. Terminal devices with reduced antenna counts are called "redcap UEs" (reduced capability user equipment), for example, devices with one or two antennas. With fewer or smaller receiving antennas, the downlink signal coverage decreases. Existing methods for estimating the channel matrix decrease in accuracy, leading to DCI decoding failures. Therefore, in some scenarios, the PDCCH becomes a bottleneck for downlink coverage.

[0158] The embodiment of the present application provides a method for transmitting information, which can improve the accuracy of channel estimation, improve the accuracy of DCI decoding, and thus improve the reliability of transmission. Specifically, the embodiment of the present application uses base station 101 as a network device, Figure 1 Taking the transmission process between the base station 101 and the terminal device 102 shown in FIG as an example, the channel estimation method of the present application is specifically introduced.

[0159] Figure 6It is a schematic interactive diagram of an example of a method for transmitting information provided in an embodiment of the present application. It should be understood that the embodiment of the present application can be applied to Figure 1 In the scenario shown, specifically, the method 600 can be applied to the terminal device 102 or the base station 101 in the scenario. Figure 6 As shown, the method 600 includes the following contents:

[0160] S610: Base station 101 sends first configuration information to terminal device 102, where the first configuration information includes first indication information, where the first indication information is used to indicate a set of M control channel elements (CCEs) included in a first control resource set. Accordingly, terminal device 102 receives the first configuration information, where M is an integer greater than or equal to 1.

[0161] Optionally, the "first control resource set" can be understood as a CORESET for the terminal device 102 to blindly detect the PDCCH candidate, that is, a physical time-frequency resource. The CORESET occupies several RBs in the frequency domain and 1 to 3 symbols in the time domain.

[0162] It should be understood that in one embodiment provided in the present application, the "first indication information" is used to instruct the terminal device 102 to divide a number of RBs occupied in the frequency domain into M CCE sets, each of which may include one or more CCEs. In other words, the "first indication information" may indicate that the CCEs mapped to the first control resource set may be divided into M CCE sets.

[0163] In a possible implementation, the first indication information may include frequency domain information, time domain information of the first control resource set, and number information N of CCEs included in each of the M CCE sets, where N is an integer greater than or equal to 1.

[0164] It should also be understood that in the embodiment of the present application, each CCE set may be defined as a "reference signal bundle set (DMRS bundle)".

[0165] It should be understood that in an embodiment of the present application, each CCE set can be defined as a "DMRS bundle", and the number information N of CCEs included in each CCE set can be defined as "DMRS bundle size". That is, a DMRS bundle can include at least one CCE, and the number of CCEs included in the DMRS bundle is the DMRS bundle size. In another embodiment provided in the present application, the first indication information can also indicate the number of DMRS bundles and the number or index of CCEs included in the DMRS bundle.

[0166] Optionally, the first indication information in the embodiment of the present application may also include frequency domain information and time domain information of the first control resource set.

[0167] In one possible implementation, the first configuration information is control resource set configuration information. Optionally, the first configuration information can be implemented via a radio resource control (RRC) message, i.e., the first indication information can be implemented by adding or reusing an indication field in the RRC message. The embodiments of the present application do not limit the specific implementation of the first configuration information.

[0168] S620, the terminal device 102 determines the M control channel element CCE sets included in the first control resource set according to the first indication information.

[0169] Optionally, the first indication information may include different contents, and the terminal device 102 may divide the first control resource set into M control channel element CCE sets according to the different contents included in the first indication information.

[0170] Figure 7 This is a schematic diagram of the division of a control resource set provided in an embodiment of the present application. Figure 7 Figure (a) shows a CORESET including three symbols, and several RBs on the CORESET are divided into CCE 0-CCE 8. In other words, CCE 0-CCE 8 can be mapped to the CORESET. The terminal device can divide the nine CCEs, namely CCE 0-CCE 8, into M CCE sets based on the content included in the first indication information.

[0171] In one possible implementation, when the first indication information includes frequency domain information and time domain information of a CORESET, and the CCEs mapped to the CORESET are CCE 0-CCE 8, the terminal device may map the 9 CCEs to the CORESET in a non-interleaved mapping or interleaved mapping manner. For example, Figure 7 FIG. 1 shows a schematic diagram of non-interleaved mapping. In this case, the REG bundles to which each CCE is mapped are continuous, for example, CCE 0 is mapped to REG bundle 0 and REG bundle 1. Figure 7 Figure (b) shows a schematic diagram of interleaving mapping, in which a CCE can be mapped to discontinuous REG bundles. For example, CCE 0 can be mapped to REG budle 0 and REG bundle 9.

[0172] It should be understood that in the embodiment of the present application, the number N of CCEs included in each CCE set may be the same, or the number N of CCEs included in some CCE sets may be the same, or the number N of CCEs included in each CCE set may be different. The embodiment of the present application does not limit the value and number of N.

[0173] For example, the first indication information may indicate only one value of N, DMRS bundle size = 4. Figure 7 As shown in Figure (c), when the CCE mapped to the CORESET is CCE 0-CCE 7 and the DMRS bundle size is 4, the terminal device 102 can divide CCE 0-CCE 7 included in the CORESET into DMRS bundle 1 (including CCE 0-CCE 3) and DMRS bundle 2 (including CCE 4-CCE 7), that is, N can be understood as the same number of CCEs included in each DMRS bundle, that is, the DMRS bundle size of each DMRS bundle is the same. At this time, the number of CCEs in each DMRS bundle of the CORESET is the same, and the terminal device 102 can start from the first CCE (CCE 0) and configure each DMRS bundle in sequence.

[0174] Alternatively, the first indication information may indicate multiple values of N, such as N1=4, N2=5. In other words, the DMRS bundles divided in the CORESET include different DMRS bundle sizes. Figure 7 As shown in Figure (a), when the CCE mapped to the CORESET is CCE 0-CCE 8, and the DMRS bundle size includes N1=4, N2=5, the terminal device 102 can divide CCE 0-CCE 8 included in the CORESET into DMRS bundle 1 (including CCE 0-CCE 3) and DMRSbundle 2 (including CCE 4-CCE 8), etc., that is, the number of the same CCE included in each DMRS bundle can be different.

[0175] In another possible implementation manner, the first indication information may include index information of the CCEs included in each CCE set in the M CCE sets.

[0176] Exemplarily, the first indication information includes CCE index information of each CCE set. For example, the first indication information indicates that DMRS bundle 1 includes CCE 0, CCE 1, CCE 2 and CCE 3, and DMRS bundle 2 includes CCE 4, CCE 5, CCE 6, CCE 7 and CCE 8, where 0-8 can be regarded as CCE index values. Figure 7 As shown in Figure (a), after receiving the first indication information, the terminal device 102 can divide the CCE mapped to the CORESET into DMRS bundle 1 and DMRS bundle 2, and then map these CCEs to the REG bundle in a non-interleaved manner. It is understandable that the terminal device 102 can also first map the CCE to the REG bundle, and then divide the CCE into different DMRS bundles. At this time, a CORESET can be divided into two DMRS bundles. It should be understood that the embodiment of the present application does not limit the order of executing the steps of dividing the DMRSbundle by the terminal device.

[0177] The above lists the different contents that the first indication information may include, and the method for the terminal device 102 to divide the CORESET according to different contents. The configuration of this method is flexible, and when the number of CCEs included in each DMRS bundle is the same, the signaling overhead can be reduced.

[0178] S630, the base station 101 sends control information to the terminal device 102.

[0179] S640, the terminal device 102 determines a first candidate control channel, where the first candidate control channel includes K CCEs, where K is an integer greater than or equal to 1.

[0180] In the embodiment of the present application, K can be understood as the aggregation level AL of the PDCCH candidate. During the process of blind detection of the PDCCH candidate by the terminal device 102, the number of CCEs included in each PDCCH candidate is determined according to the value of AL, for example, AL=1, 2, 4, 8, 16.

[0181] For example, Figure 7As shown in (a) of FIG, when AL=2, the terminal device 102 can use CCE0 and CCE 1 shown in the shaded area as one PDCCH candidate. Similarly, CCE 2 and CCE 3 can be used as another PDCCH candidate. Similarly, the CORESET can include multiple PDCCH candidates to be detected. In the description of the embodiment of the present application, an example will be given in which a PDCCH candidate includes two CCEs.

[0182] S650: In the M CCE sets, the terminal device 102 determines a first target CCE set where the K CCEs are located.

[0183] Optionally, in an embodiment of the present application, the first target CCE set may be one or more of the M CCE sets divided on the CORESET. Exemplarily, the first target CCE set may be any one of the M CCE sets, or the first target CCE set may be at least two CCE sets among the M CCE sets, which is not limited in this embodiment of the present application.

[0184] For example, Figure 7 According to the division method shown in Figure (a), if the first candidate control channel includes CCE 0 and CCE 1 shown in the shaded area, then according to S650, the first target CCE set where CCE 0 and CCE 1 are located is DMRS bundle 1. In other words, the first target CCE set where the first candidate control channel is located is DMRS bundle 1.

[0185] Figure 8 This is another example of a control resource set partition diagram provided in the embodiment of the present application. For example, Figure 8 As shown in (a) of FIG, if the terminal device 102 divides the CCE mapped to the CORESET into DMRS bundle 1, DMRS bundle 2, and DMRS bundle 3. In addition, the terminal device determines that the first candidate control channel to be detected includes CCE 2 and CCE3 shown in the shaded area, then according to S650, the terminal device 102 determines that the target set where CCE 2 is located is DMRS bundle 1, and the target set where CCE3 is located is DMRS bundle 2. In other words, the first target CCE set where the first candidate control channel is located includes DMRS bundle 1 and DMRS bundle 2.

[0186] It should be understood that Figure 8Figure (a) shows a possible scenario when CCE and REG are non-interleaved mapping. Similarly, when CCE and REG are interleaved mapping, the possible division of CCE mapped to the CORESET can be Figure 8 As shown in Figure (b), for the CCE 2 and CCE 3 included in the first candidate control channel, the corresponding first target CCE set is also DMRS bundle 1 and DMRS bundle 2, which will not be repeated here.

[0187] S660, the terminal device 102 receives the control information sent by the base station 101 on the first candidate control channel according to the reference signal corresponding to the first target CCE set.

[0188] Optionally, the control information sent by the base station 101 to the terminal device 102 may be DCI. Before obtaining the DCI, the terminal device 102 may first obtain the DMRS corresponding to the downlink candidate control channel (PDCCH candidate) and use the DMRS to demodulate the downlink candidate control channel (PDCCH candidate). Specifically, the terminal device 102 may use the DMRS to estimate the channel matrix H of the downlink candidate control channel (PDCCH candidate), and then use H to demodulate the DCI to accurately receive the DCI.

[0189] It should be understood that in the embodiment of the present application, the terminal device 102 can use all available reference signals in the first target CCE set to perform estimation during the process of estimating the channel matrix H.

[0190] It should also be understood that the terminal device 102 can accurately know the precoding method of the DMRS sent by the base station 101. In an embodiment of the present application, "all available reference signals" in the first target CCE set can be understood as reference signals with the same precoding method as the first candidate control channel to be detected.

[0191] In one possible implementation, the base station 101 can add second indication information to the first configuration information, where the second indication information is used to indicate the precoding method of the reference signal corresponding to the M CCE set. In other words, the second indication information is used to tell the terminal device 102 the precoding method of the DMRS corresponding to different CCEs.

[0192] It should be understood that the precoding method of DMRS may include precoding granularity (precoder), or precoding codewords, etc. In the embodiment of the present application, Arabic numerals 1, 2, 3, and 4 can represent different precoding codewords, and the precoding codewords 1, 2, 3, and 4 can represent different DMRS precoding methods.

[0193] It should also be understood that in the embodiment of the present application, the second indication information may only configure the precoding method, or only configure the precoding granularity, and will not specifically indicate the precoding codebook. Specifically, in the embodiment of the present application, the Arabic numerals 1, 2, 3, and 4 represent different codewords, which are only used to describe the precoding method and granularity. In other words, the REG Bundle marked as 1 uses the same precoding codeword, and the terminal device does not need to know the specific value of the precoding codeword (i.e., the codebook), and the embodiment of the present application does not limit this. In subsequent embodiments or drawings, the DMRS of the REG Bundle marked as 1 has the same precoding codeword, and the DMRS of the REG Bundle marked as 2 has the same precoding codeword.

[0194] It should also be understood that, in conjunction with the aforementioned formula (1), during the DMRS generation process, the base station 101 may configure N ID and precoder, for example, N ID Configure them the same, or configure the same N for a certain type of terminal device ID , or a group of terminal devices with the same N ID , the embodiments of this application do not limit this.

[0195] Specifically, for the process of S660, the terminal device 102 can determine, in the reference signal corresponding to the first target CCE set, a target reference signal with the same precoding method as the reference signal corresponding to the K CCEs based on the precoding method indicated by the second indication information, and receive the control information sent by the network device on the first candidate control channel based on the target reference signal.

[0196] Optionally, the precoding mode indicated by the second indication information includes any one of the following possible situations:

[0197] (1) All DMRSs corresponding to the M CCE sets use the same precoding.

[0198] For example, combined Figure 7The CORESET division method shown in Figure (a) in FIG6 includes DMRS bundle 1 and DMRS bundle 2. According to the situation (1), all DMRSs included in the CORESET use the same precoding codeword. In other words, all DMRSs of DMRS bundle 1 and DMRS bundle 2 use the same precoding codeword. For example, all DMRSs corresponding to CCE 0-CCE 8 can be marked as precoding codeword 1. According to method 600, the terminal device 102 can use all DMRSs of CCE 0-CCE 3 in DMRS bundle 1 to estimate the channel matrix H of the first candidate control channel.

[0199] (2) The DMRS corresponding to each CCE set in the M CCE sets adopts the same precoding.

[0200] For example, combined Figure 7 In the CORESET division method shown in Figure (a), the DMRS corresponding to DMRS bundle 1 included in the CORESET can use the same precoding codeword 1, and the DMRS corresponding to DMRS bundle 2 can use the same precoding codeword 2. The terminal device 102 can use all DMRSs of CCE 0-CCE 3 in DMRS bundle 1 to estimate the channel matrix H of the first candidate control channel.

[0201] (3) The DMRS corresponding to each resource element bundle included in each CCE adopts the same precoding, and the DMRSs corresponding to the resource element bundles on any two CCEs adopt the same precoding.

[0202] It should be understood that the “corresponding resource element bundles on two CCEs” here can be understood as the DMRS of the first REG bundle of each CCE adopting the same precoding, the DMRS of the second REG bundle of each CCE adopting the same precoding, and so on.

[0203] For example, Figure 7As shown in Figure (a), the CORESET includes DMRS bundle 1. The DMRS corresponding to REGbundle 0 of CCE 0 can use the same precoding codeword 1, the DMRS corresponding to REG bundle 1 of CCE 0 can use the same precoding codeword 2, the DMRS corresponding to REG bundle 2 of CCE 1 can use the same precoding codeword 1, and the DMRS corresponding to REG bundle 3 of CCE 1 can use the same precoding codeword 2. In other words, the DMRS of the first REG bundle (REG bundle 0) of CCE 0 and the first REG bundle (REG bundle 2) of CCE 1 can use the same precoding codeword 1, and the DMRS of the second REG bundle (REG bundle 1) of CCE 0 and the second REGbundle (REG bundle 3) of CCE 1 can use the same precoding codeword 2. The same rule applies to CCE 2 and CCE 3 in DMRS bundle 1. Figure 7 The rules of the pre-coding codewords shown in Figure (a) will not be repeated here.

[0204] For Figure 7 In the scenario shown in Figure (a), the terminal device 102 can use all DMRSs marked as precoding codeword 1 in DMRS bundle 1 to jointly estimate the REG bundle 0 and REG bundle 2 channel matrices of the first candidate control channel, and use all DMRSs marked as precoding codeword 2 in DMRS bundle 1 to jointly estimate the REG bundle 1 and REG bundle 3 channel matrices of the first candidate control channel.

[0205] Through the joint estimation process introduced above, such as Figure 7 As shown in (a) of FIG, if the first candidate control channel includes CCE 0 and CCE 1 shown in shaded areas, the terminal device 102 may perform joint estimation using all available DMRSs in DMRS bundle 1. In other words, the terminal device 102 may jointly estimate the channel matrix using all available DMRSs in CCE 0, CCE 1, CCE 2, and CCE 3.

[0206] Alternatively, in another possible scenario, the two CCEs included in the first candidate control channel may be located in two different CCE sets, or in other words, the two CCEs included in the first candidate control channel are respectively included in two different DMRS bundles.

[0207] For example, Figure 8 As shown in (a) of FIG, if the first candidate control channel includes CCE 2 and CCE 3 shown in shaded areas, the terminal device 102 can jointly estimate the channel matrix of CCE 2 using the DMRS in DMRS bundle 1, and estimate the channel matrix of CCE 3 using the DMRS in DMRS bundle 2. It should be understood that the precoding codewords of the DMRSs in the joint estimation process are the same. Please refer to the aforementioned introduction to the precoding codewords, which will not be repeated here.

[0208] The above solution improves channel estimation performance and accuracy by dividing the CCEs mapped to the CORESET into different DMRS bundles and using more DMRS within a DMRS bundle for joint channel estimation. Furthermore, during the specific channel estimation process, the terminal device can flexibly select a target reference signal based on the different precoding schemes within the DMRS bundle. Specifically, it can select a target reference signal with the same precoding scheme as the reference signal on the first candidate control channel to be detected for channel estimation, thereby increasing the flexibility of the terminal device's channel estimation process.

[0209] In the above implementation process, the first configuration information may be control resource set configuration information.

[0210] Optionally, the first indication information and the second indication information may be different indication fields added to the control resource set configuration information; or, the first indication information and the second indication information reuse the same indication field in the control resource set configuration information, implicitly indicating different contents; or, the first indication information and the second indication information are the same indication field newly added to the control resource set configuration information, implicitly indicating different contents. The embodiment of the present application does not limit the specific configuration method of the first indication information and the second indication information.

[0211] It should be understood that the above method can be used for one type of terminal device, one terminal device, or different types of terminal devices. The terminal device 102 can perform channel estimation on a CORESET in one or more slots through the above process. In conjunction with the above method 600, two possible implementation processes for channel estimation in the same CORESET in the same slot for different types of terminal devices are first introduced below for different scenarios.

[0212] Scenario 1: Sharing a DMRS bundle within a CORESET for channel estimation

[0213] A CORESET may include different types of terminal devices, such as the redcap UEs described above, or other terminal devices, referred to as "legacy UEs." In this scenario, redcap UEs and legacy UEs can share the same DMRS bundle division method.

[0214] In one possible implementation, base station 101 defines the DMRS bundle size (i.e., the number of CCEs included in each DMRS bundle) through the aforementioned first indication information, similar to how it defines aggregation level AL to terminal device 102. Simultaneously, base station 101 may also define the precoding method within the DMRS bundle through the aforementioned second indication information.

[0215] Optionally, for the same slot and one CORESET scenario, for example, CORESET ID=X, if the first indication information only defines DMRS bundle size=N, and N has only one value, it implicitly defines the division method of all DMRS bundles in the CORESET. Figure 8 In Figure (a), if the first indication information indicates that the DRMS bundle size is 3 CCEs, that is, CCE 0-CCE 2 is a DMRS bundle 1, CCE 3-CCE 5 is a DMRS bundle 2, and CCE 6-CCE 8 is a DMRS bundle 3; at the same time, the base station can indicate the precoding method in the DRMS bundle through the second indication information. The different precoding methods can refer to the aforementioned related introduction, for example, the precoding method of each corresponding REG bundle or each DMRS bundle is the same, which will not be repeated here.

[0216] For example, Figure 8 In the process shown in Figure (a), Table 1 lists possible contents included in the first configuration information.

[0217] Table 1

[0218]

[0219] A possible code implementation process of the first indication information is as follows:

[0220]

[0221] A possible code implementation process of the second indication information is as follows:

[0222] Precoder Granularity

[0223] ENUMERATED{sameAsREG-bundle,allContiguousRBs,sameAsDmrs-Bundle}

[0224] When performing channel estimation, terminal devices can utilize all DMRS with the same precoding codeword within a defined DMRS bundle for joint channel estimation. This improves channel estimation performance, increases channel estimation accuracy, improves frequency gain, and enhances PDCCH coverage. Furthermore, during implementation, CCEs outside the target DMRS bundle, if not allocated to other DMRS bundles, are not restricted in their DMRS precoding method, reducing constraints on the base station.

[0225] Optionally, the first configuration information can be implemented through a radio resource control (RRC) message, that is, the first indication information and the second indication information can be implemented by adding or multiplexing an indication field in the RRC message, which will not be described in detail in the embodiments of the present application.

[0226] Scenario 2: Different terminal devices can use different DMRS bundles for channel estimation

[0227] It should be understood that in existing PDCCH enhancements, different numbers of symbols can be allocated to different types of terminal devices on a CORESET for DCI transmission. For example, for the redcap UE described above, the number of symbols included in the CORESET can be expanded, and the CCEs of the expanded CORESET can be uniformly numbered or renumbered with the CCEs of the CORESET of the original legacy UE.

[0228] In one possible implementation, after the symbol number is expanded, the CCEs of the CORESET of the redcap UE can be numbered uniformly with the CCEs of the CORESET of the legacy UE. When the expanded symbols continue to be numbered uniformly, it can be understood that the CORESET ID has not changed, that is, the CORESET ID remains unchanged.

[0229] Optionally, the base station 101 defines the DMRS bundle size, i.e., the number of CCEs included in each DMRS bundle, by sending different first indication information to the legacy UE and the redcap UE, in a manner similar to defining the aggregation level AL to the terminal device 102. Furthermore, the base station 101 defines the precoding method within the DMRS bundle by sending different second indication information to the legacy UE and the redcap UE.

[0230] Figure 9 This is another example of a control resource set partition diagram provided in the embodiment of the present application. For example, Figure 9 As shown in Figure (a), if the CORESET of a legacy UE can occupy 3 symbols, as shown on the left side of the thick black solid line, symbols 1 to 3. After expanding the number of symbols, the CORESET of a redcap UE can occupy 6 symbols, as shown on the left side of the thick black solid line, and symbols 4 to 6 on the right side of the thick black solid line. In other words, for a legacy UE, in the same CORESET, only the resources of symbols 1 to 3 on the left side of the black solid line are detected. For a redcap UE, in the same CORESET, resources of symbols 1 to 6 can be detected.

[0231] For example, the base station 101 may configure different DMRS bundles for legacy UE and redcap UE through different first indication information, for example, DMRS bundle size=4. Figure 9 As shown in Figure (a), for legacy UE, CCE 0-CCE 3 is DMRS bundle 1, and CCE 4-CCE 7 is DMRS bundle 2; Figure 9 As shown in Figure (b), for redcap UE, CCE 0, CCE 1, CCE 9, and CCE 10 are DMRS bundle 1, and CCE 2, CCE 3, CCE 11, and CCE 12 are DMRS bundle 2. The precoding method within each DMRS bundle can refer to the aforementioned related introduction. For example, the precoding method of each corresponding REG bundle or each DMRS bundle is the same, which is not repeated here.

[0232] Exemplarily, in combination with the content of the first configuration information listed in Table 1, in this scenario 2, the base station 101 can configure different first configuration information for the legacy UE and the redcap UE, which will not be repeated here.

[0233] According to the method 600 provided in the embodiment of the present application, when the terminal device 102 performs joint channel estimation, if the AL of the first candidate control channel is 2, for legacy UE, such as Figure 9 As shown in Figure (a), the first candidate control channel includes CCE 0 and CCE 1 shown in shadow. The terminal device 102 can perform joint channel estimation through the DMRS of CCE 0-CCE 3 of DMRS bundle 1, determine the channel matrix of the first candidate control channel, and further decode the DCI.

[0234] For redcap UE, such as Figure 9 As shown in Figure (b), the first candidate control channel includes CCE 0 and CCE 9 shown in shadow. The terminal device 102 can perform joint channel estimation through the DMRS of CCE 0, CCE 1, CCE 9 and CCE 10 of DMRS bundle 1 to determine the channel matrix of the first candidate control channel and further decode the DCI.

[0235] Optionally, when defining the DMRS bundle size through the first indication information, different DMRS bundle sizes can be configured for legacy UE and redcap UE, for example, the DMRS bundle size for legacy UE is configured to be 2, and the DMRS bundle size for redcap UE is configured to be 4. This embodiment of the present application does not limit this.

[0236] Optionally, the implementation process of signaling such as configuration information can refer to the above introduction and will not be repeated here.

[0237] This method allows different DMRS bundle sizes to be configured for different types of terminal devices. When performing channel estimation, the terminal device uses all DMRSs with the same precoding scheme within a defined DMRS bundle for joint channel estimation. This improves channel estimation performance, increases channel estimation accuracy, improves frequency gain, and enhances PDCCH coverage. Furthermore, for the same physical resources, it further reduces restrictions on legacy UEs.

[0238] In another possible implementation, after the symbol count is expanded, the CCEs of the CORESET of the redcap UE and the CCEs of the CORESET of the legacy UE can be renumbered. This renumbering can be understood as a change in the CORESET ID, that is, a change in the CORESET ID. This situation will be described in detail later in conjunction with other embodiments.

[0239] In summary, combined with Figure 6 The method 600, and Figure 7-Figure 9 The diagram shows how DMRS bundles are divided within the same CORESET, and how terminal devices use the DMRS within a DMRS bundle for joint channel estimation. In addition, different CORESETs can also perform joint channel estimation on a PDCCH candidate based on different DMRS bundles.

[0240] It should be understood that different CORESETs can be Figure 6 On the basis of the method 600 shown, the base station further configures the linkage relationship between different DMRS bundles on different CORESETs for the terminal device, and the terminal device can perform joint channel estimation based on the DMRS corresponding to the different DMRS bundles with associated relationships on different CORESETs. The following introduces another method for transmitting information provided in an embodiment of the present application in conjunction with the accompanying drawings.

[0241] Figure 10 It is a schematic interactive diagram of another example of a method for transmitting information provided by an embodiment of the present application. It should be understood that the embodiment of the present application can be applied to Figure 1 In the scenario shown, specifically, the method 1000 can be applied to the terminal device 102 or the base station 101 in the scenario.

[0242] like Figure 10 As shown, the method 1000 includes the following contents:

[0243] S1010: Base station 101 sends first configuration information to terminal device 102. The first configuration information includes first indication information, and the first indication information is used to indicate a set of M control channel elements (CCEs) included in a first control resource set. Accordingly, terminal device 102 receives the first configuration information, where M is an integer greater than or equal to 1.

[0244] S1020, the terminal device 102 determines the M control channel element CCE set included in the first control resource set according to the first indication information.

[0245] S1030, the base station 101 sends second configuration information to the terminal device 102, where the second configuration information is used to indicate a second target CCE set associated with the first target CCE set.

[0246] It should be understood that the second configuration information is used to configure the linkage relationship between different DMRS bundles on different CORESETs. The linkage relationship can be understood as a mapping relationship, that is, the base station 101 can indicate more DMRS bundles to the terminal device 102 so that the terminal device 102 can perform joint channel estimation based on more DMRS.

[0247] In an embodiment of the present application, it is assumed that the terminal device 102 needs to estimate the first candidate control channel, the DMRS bundle where the CCE included in the first candidate control channel is located is the first target CCE set, and another DMRS bundle that has a certain association relationship with the first target CCE set is the "second target CCE set" in the embodiment of the present application. The linkage relationship between the first target CCE set and the second target CCE set can be defined in a variety of different ways.

[0248] In a possible implementation, the second configuration information includes an offset between the first target CCE set and the second target CCE set, and the offset includes at least one of a time domain offset and a frequency domain offset.

[0249] Optionally, the time domain offset is a timeslot offset and / or a symbol offset, and the frequency domain offset is a CCE offset.

[0250] It should be understood that the first target CCE set and the second target CCE set may have the same frequency domain position and different time domain positions; or, the first target CCE set and the second target CCE set may have different frequency domain positions and the same time domain positions; or, the first target CCE set and the second target CCE set may have different frequency domain positions and time domain positions.

[0251] Specifically, the time domain information and frequency domain information of the first target CCE set are known. By configuring the slot and / or symbol number of the time domain offset, and / or the CCE number of the frequency domain offset of the first target CCE set and the second target CCE set in the second configuration information, the terminal device 102 can determine the time domain information and frequency domain information of the second target CCE set, and then determine the second target CCE set.

[0252] In another possible implementation, the second configuration information includes a mapping relationship between M CCE sets and L CCE sets, where the L CCE sets are CCE sets in a second control resource set, and the second control resource set and the first control resource set have different identifiers. In other words, the second configuration information can also be used to indicate an association relationship between the M control channel element CCE sets included in the first control resource set and the L control channel element CCE sets included in the second control resource set.

[0253] Specifically, the first control resource set may be CORESET ID=X, and the CCE mapped to the CORESET may be divided into M DMRS bundles; the second control resource set may be CORESET ID=Y, and the CCE mapped to the CORESET may be divided into L DMRS bundles. In this case, the second configuration information may indicate the association relationship between the M DMRS bundles in the CORESET with CORESET ID=X and the L DMRS bundles in the CORESET with CORESET ID=Y. Among them, M may be equal to L, or M may be greater than L, or M may be less than L. In other words, one DMRS bundle in the CORESET with CORESET ID=X may be associated with one or more DMRS bundles in the CORESET with CORESET ID=Y. Specifically, after the terminal device determines the first target CCE set, it may select one or more DMRS bundles from the CORESET with CORESET ID=Y as the second target CCE set according to the second configuration information, and this embodiment of the present application is not limited to this.

[0254] S1040, the base station 101 sends control information to the terminal device 102.

[0255] S1050, the terminal device 102 determines a first candidate control channel, where the first candidate control information includes K CCEs, where K is an integer greater than or equal to 1.

[0256] S1060: In the M CCE sets, the terminal device 102 determines the first target CCE set where the K CCEs are located.

[0257] S1070, the terminal device 102 determines the second target CCE set according to the first target CCE set and the second configuration information.

[0258] S1080, the terminal device 102 receives control information sent by the base station 101 on the first candidate control channel according to the reference signal corresponding to the first target CCE set and the reference signal corresponding to the second target CCE set.

[0259] In the above process of S1010-S1080, the implementation of steps S1010-S1020, S1040-S1060, etc. can be found in Figure 6 For the sake of simplicity, the corresponding introduction of method 600 will not be repeated here.

[0260] Through the above method, before obtaining DCI, the terminal device 102 can obtain the DMRS estimation channel matrix H1 corresponding to the first target CCE set, obtain the DMRS estimation channel matrix H2 corresponding to the second target CCE set, and then generate the channel matrix H based on H1 and H2, that is, use more DMRS for channel estimation, thereby improving the accuracy of channel estimation. In addition, in the specific channel estimation process, the terminal device can flexibly select the target reference signal according to the different precoding methods in the DMRS bundle, that is, select the target reference signal with the same precoding method as the reference signal on the first candidate control channel to be detected for channel estimation, thereby improving the flexibility of the terminal device's channel estimation process.

[0261] It should be understood that the second target CCE set and the first target CCE set can be used for scheduling different terminal devices, but only during channel estimation, the reference signal available in the second target CCE set is used for joint channel estimation, which will not be further described later.

[0262] against Figure 10 In method 1000, the first target CCE set and the second target CCE set may occupy different symbols of the same time slot, and may also be located in different time slots. As described above, the base station 101 may indicate the linkage relationship between the first target CCE set and the second target CCE set to the terminal device 102 through the second configuration information, that is, indicate the time domain offset and / or frequency domain offset between the first target CCE set and the second target CCE set. It should be understood that the linkage relationship may be indicated in an explicit or implicit manner. Several possible channel estimation processes are described below for different scenarios.

[0263] Scenario 3: Joint channel estimation using a DMRS bundle within a CORESET ID shared by different slots

[0264] In the third scenario, taking two slots as an example, the base station 101 may configure mutually related DMRS bundles on the two slots for the terminal device 102 respectively, and the CORESET where the two DMRS bundles are located may have the same CORESETID.

[0265] It should be understood that the aforementioned Figure 6Scenario 1 introduces the related configuration method of the first configuration information on each CORESET. Scenario 3 can add second configuration information on the basis of Scenario 1 to indicate another DMRS bundle (second target CCE set) associated with the DMRS bundle (first target CCE set). In the embodiment of the present application, the SS where the first target CCE set is located can be called a "scheduling SS", the CORESET associated with the scheduling SS can be called a "scheduling CORESET", the SS where the second target CCE set is located can be called a "bundle SS", and the CORESET associated with the bundle SS can be called a "bundleCORESET".

[0266] Optionally, when the second configuration information is search space configuration information, the second configuration information is configured in the scheduling SS and does not need to be configured in the bundle SS. In one possible implementation, when the CORESETID of the bundle CORESET is the same as the CORESET ID of the scheduling CORESET, the terminal device assumes that the bundle CORESET and the scheduling CORESET have the same configuration. In other words, the DMRS bundle of the bundle CORESET and the scheduling CORESET, as well as the precoding method of the DMRS bundle and other configurations are the same. Exemplarily, in this implementation, for the configuration of the scheduling CORESET, as shown in Table 2 below, the base station can configure the time domain offset and frequency domain offset between the first target CCE set and the second target CCE set through the second configuration information.

[0267] Table 2

[0268]

[0269] Specifically, the base station 101 first configures the scheduling CORESET through the first configuration information, for example, as shown in Table 1 in the aforementioned scenario 1, in a manner similar to defining the aggregation level AL to the terminal device 102, the DMRS bundle size in CORESETID=0 is defined through the first indication information, that is, the number of CCEs included in each DMRS bundle, and at the same time, the precoding method within the DMRS bundle is defined through the second indication information introduced above. In addition, in this embodiment, by adding the second configuration information, the second configuration information indicates to the terminal device that the bundle CORESET and the scheduling CORESET have the same CORESET ID, and configures the time domain offset and frequency domain offset information.

[0270] Figure 11This is another example of a control resource set partition diagram provided in an embodiment of the present application. For example, Figure 11 As shown, for different slot A and slot AB, the CORESET of slot A is the scheduling CORESET, and the CORESET of slot AB is the bundle CORESET. For the scheduling CORESET of slot A, through the content of the first configuration information of Table 1 listed in scenario 1, the first indication information indicates that the scheduling CORESET has the division of DMRS bundle 1-DMRSbundle 3 as shown in the figure, and the DMRS bundle size of each DMRS bundle is 3 CCEs. And the precoding method on the DMRS bundle is indicated by the second indication information, for example, the DMRS marked as 1 in DMRS bundle 1 has the same precoding codeword, and the DMRS marked as 2 has the same precoding codeword.

[0271] In this scenario three, the base station can also indicate the CORESET ID = X of the bundle CORESET, as well as the time domain offset and frequency domain offset between the bundle CORESET and the scheduling CORESET through the second configuration information listed in Table 2 above. For example, the frequency domain offset between the bundle CORESET and the scheduling CORESET is offset = 0 CCE, and the time domain offset is -B time slots. Then, for the CORESET ID = X of slot AB, as Figure 11 As shown, the CORESET as bundleCORESET can have the same configuration as the CORESET of slot A, that is, the number of CCEs included in DMRS bundle 1-1 and DMRS bundle 1, the REG bundle number of CCE, and the precoding granularity on the same REG bundle are all the same.

[0272] The first candidate control channel to be detected by the terminal device 102 includes CCE 0 and CCE 1 shown in shaded areas. At this time, the terminal device 102 can determine that the first target CCE set where the first candidate control channel includes CCE 0 and CCE 1 shown in shaded areas is DMRS bundle 1, and then determine that the DMRS bundle 1-1 in slot AB is found through the time domain offset time slot number -B and DMRS bundle 1.

[0273] The terminal device 102 can perform joint channel estimation through the DMRS of CCE 0-CCE 3 of DMRS bundle 1 and the DMRS with the same precoding method in CCE 0-CCE 3 of DMRS bundle 1-1, determine the channel matrix of the first candidate control channel, and further decode the DCI.

[0274] Optionally, the second configuration information may also be implemented through an RRC message, that is, by adding or multiplexing an indication field in the RRC message. This embodiment of the present application does not limit this.

[0275] The above description uses the time domain offset as a time slot (slot num) as an example. The time domain offset can also be expressed in symbols (symbol num). Optionally, the time domain offset (slot num and / or symbol num) can be positive or negative. When the time domain offset is negative, for example Figure 11 In the example, DMRS bundle 1-1 of slot AB and DMRS bundle 1 of slot A are used to jointly estimate the first candidate control channel of slot A, which is beneficial to reducing delay.

[0276] In another possible implementation, if the second configuration information does not include information of the associated CORESET ID, the terminal device may assume that the CORESET ID where the second target CCE set is located is the same as the CORESET ID where the second target CCE set is located, that is, both are CORESET ID = X, then the second configuration information may only include the time domain offset and the frequency domain offset.

[0277] Exemplarily, for CORESET ID=X, as shown in Table 3 below, possible first configuration information and second configuration information may include the following contents.

[0278] Table 3

[0279]

[0280] In scenario three, the frequency domain offset is set to 0 CCEs, ensuring that slots AB and A are coherent in the time domain. The channel estimation gain comes from performing multi-DMRS frequency filtering on slots AB and A separately, followed by time domain filtering on multiple slots, achieving a gain in joint multi-DMRS estimation in both the frequency and time domains.

[0281] Through the above method, when the terminal device performs channel estimation, it can use all available DMRS in a defined DMRS bundle and another DMRS bundle associated across time slots for joint channel estimation, which improves the channel estimation performance, improves the accuracy of channel estimation, increases the frequency gain, and enhances the PDCCH coverage.

[0282] Scenario 4: Joint channel estimation of DMRS bundles in different CORESET IDs across different slots

[0283] In the fourth scenario, taking two slots as an example, the base station 101 may configure DMRS bundles on the two slots for the terminal device 102 respectively, and the CORESETs where the two DMRS bundles are located may have different CORESET IDs.

[0284] It should be understood that the aforementioned Figure 6 Scenario 1 described how to configure the first configuration information on each CORESET. Scenario 4 can add second configuration information based on Scenario 1 to indicate a "bundle CORESET" with a different CORESET ID associated with the "scheduling CORESET." For example, the scheduling CORESET where the first target CCE set is located has a CORESET ID of X, and the bundle CORESET where the second target CCE set is located has a CORESET ID of Y.

[0285] In one possible implementation, for a scheduled CORESET (CORESET ID=X) and a bundle CORESET (CORESET ID=Y), their own DMRS bundle and the precoding mode of the DMRS bundle can be configured respectively through first configuration information. In this implementation, for the configuration of the scheduled CORESET, the base station sends second configuration information in addition to the first configuration information sent to the terminal device, indicating the association relationship between the scheduled CORESET and the bundle CORESET through the second configuration information.

[0286] Optionally, the second configuration information may indicate the CORESET ID information, time domain offset, and frequency domain offset information of the bundle CORESET. Exemplarily, the scenario may be as shown in Table 4 below. Specifically, the base station 101 first configures the scheduling CORESET and the bundle CORESET separately through the first configuration information, and defines the number of CCEs of DMRS bundle size = 4 in CORESET ID = X and Y through the first indication information in a manner similar to defining the aggregation level AL to the terminal device 102. At the same time, the precoding granularity within the DMRS bundle is defined through the second indication information introduced above. In addition, in this embodiment, by adding the second configuration information, the second configuration information indicates to the terminal device the CORESET ID = Y of the bundle CORESET, and configures information such as the number of time slots of the time domain offset, the number of CCEs of the frequency domain offset, and so on.

[0287] Table 4

[0288]

[0289] Figure 12 This is another example of a control resource set partition diagram provided in an embodiment of the present application. For example, Figure 12 As shown, for different slots A and slot AB, the CORESET of slot A is the scheduling CORESET, and the CORESET of slot AB is the bundle CORESET. For the scheduling CORESET of slot A, the first indication information in the first configuration information indicates that the scheduling CORESET has the DMRS bundle as shown in the figure, and the second indication information indicates the precoding method on the DMRS bundle, for example, all DMRSs of DMRS bundle 1 are marked as 1, that is, all use the same precoding codeword.

[0290] In this scenario 4, the base station may also indicate the CORESET ID of the bundle CORESET = Y, and the time domain offset and frequency domain offset between the bundle CORESET and the scheduling CORESET through the second configuration information listed in Table 3 above. For example, the frequency domain offset between the bundle CORESET and the scheduling CORESET is offset = 4 CCEs, and the time domain offset is -B time slots. Then, for the CORESET ID = Y of slot AB, as shown in FIG. Figure 12As shown, the CORESET, as a bundleCORESET, can have a configuration different from that of CORESET ID=X. For example, when CORESET ID=X, the number of occupied symbols is 2, the number of 4 CCEs included in DMRS bundle 1-1, the REG bundle number of CCE and the scheduling CORESET are different, and the precoding granularity of all DMRSs of DMRSbundle 1 and DMRS bundle 1-1 are the same.

[0291] The first candidate control channel to be detected by the terminal device 102 includes CCE 0 and CCE 1 shown in shaded areas. At this time, the terminal device 102 can determine that the first target CCE set where the first candidate control channel includes CCE 0 and CCE 1 shown in shaded areas is DMRS bundle 1, and then determine that the DMRS bundle 1-1 in slot AB is found through the time domain offset time slot number -B and DMRS bundle 1.

[0292] The terminal device 102 can perform joint channel estimation using the DMRS of CCE 0-CCE 3 of DMRS bundle 1 and all DMRS of CCE 4-CCE 7 of DMRS bundle 1-1 to determine the channel matrix of the first candidate control channel and further decode the DCI.

[0293] In another possible implementation, the second configuration information may indicate the SS ID information, time domain offset, and frequency domain offset information of the bundle CORESET. Exemplarily, the scenario may be as shown in Table 5 below. Specifically, the base station 101 first configures the scheduling CORESET and the bundle CORESET separately through the first configuration information, and defines the number of DMRS bundle size = 4 CCEs in CORESET ID = X and Z through the first indication information in a manner similar to defining the aggregation level AL to the terminal device 102. At the same time, the precoding granularity within the DMRS bundle is defined through the second indication information introduced above. In addition, in this embodiment, by adding the second configuration information, the second configuration information indicates to the terminal device the SS ID = Z of the bundle CORESET, and configures information such as the number of time slots of the time domain offset, the number of CCEs of the frequency domain offset, and so on.

[0294] Table 5

[0295]

[0296] Specifically, different SS IDs are associated with different CORESETs. If the second configuration information contains information about the SS ID, the terminal device can determine the CORESET ID based on the information about the SS ID, and use the CORESET indicated by the CORESET ID as the bundle CORESET. It should be understood that if the terminal device has no scheduling on the CORESET determined by the information about the SS ID, the SS determined by the different SS ID=Z indicated by the second configuration information is only used to determine the second target CCE set, and the terminal device does not blindly detect the DCI on the SS. If the terminal device has scheduling on the CORESET determined by the information about the SS ID, the bundle SS ID can be directly configured through the second configuration information, which will not be repeated here.

[0297] It should be understood that for the first configuration information, the second configuration information under scenario 4, and the same implementation methods in other scenarios, please refer to the above description and will not be repeated here.

[0298] Through the above method, when the terminal device performs channel estimation, it can use all available DMRS in a defined DMRS bundle and another DMRS bundle associated across time slots for joint channel estimation, which improves the channel estimation performance, improves the accuracy of channel estimation, improves the frequency gain, and enhances the PDCCH coverage. And when the time domain offset is negative, for example Figure 12 In the example, DMRS bundle 1-1 of slot AB and DMRS bundle 1 of slot A are used to jointly estimate the first candidate control channel of slot A, which is beneficial to reducing delay.

[0299] Optionally, the time domain offset and / or frequency domain offset configured in the second configuration information may be any offset such as CORESET, SS, etc. that can determine the resource location, and this embodiment of the present application is not limited to this.

[0300] In one possible implementation, for a scenario where a redcap UE extends the CCEs of a legacy UE's CORESET and renumbers them, for the redcap UE, the extended CORESET can be used as a new CORESET, or it can be implemented according to different CORESET association methods, which will not be described in detail here.

[0301] It should be understood that in the above scenarios three and four, priority can be given to ensuring that the frequency domain positions of the first target CCE set and the second target CCE set are the same, so that the first target CCE set and the second target CCE set are coherent in the time domain, achieving greater frequency gain.

[0302] Scenario 5: Joint channel estimation of DMRS bundles in different CORESET IDs across different slots

[0303] To enhance PDCCH coverage, base station 101 can repeatedly send the same DCI in two slots (or "PDCCH repetition"). The terminal device can then detect the DCI in the two slots separately and perform joint decoding based on the DCI detected in the two slots. In the existing PDCCH repetition scenario, the terminal device needs to perform a blind detection on the first slot to obtain the DCI; then perform a blind detection on the second slot to obtain the DCI, and perform joint decoding based on the DCI of the two slots, thereby improving the accuracy of receiving the DCI and thereby enhancing PDCCH coverage. However, this process does not reduce the number of blind detections in the two slots.

[0304] In one possible way, in scenario five, in combination with method 1000 provided in an embodiment of the present application, the terminal device may first perform blind detection on the previous slot to determine the PDCCH candidate, and then based on the first target CCE set where the detected PDCCH candidate is located, optionally, the second configuration information may indicate the mapping relationship between the M DMRS bundles on slot C and the L DMRS bundles on slot C+1. In this process, the terminal device may determine the second target CCE set associated on the next slot based on the first target CCE set and the mapping relationship, and then perform blind detection only within the second target CCE set on the next slot. In other words, the terminal device only needs to perform blind detection within the previous slot, and within the next slot, it only performs blind detection within the associated second target CCE set, reducing the number of blind detections on other CCEs in the next slot.

[0305] Figure 13 This is another example of a control resource set partition diagram provided in an embodiment of the present application. For example, Figure 13As shown, the first indication information indicates that the DMRS bundle size is 4 CCEs, determines the division method and range of the DMRS bundle in slot C, and the base station sends DCI in slot C. The terminal device, through blind detection, determines that the first target CCE set where the PDCCHcandidate sending the DCI is located is DMRS bundle 1-1, and the terminal device obtains DCI1 sent on slot C. The terminal device determines DMRS bundle 1 associated with DMRS bundle 1-1 in slot C+1 based on the second configuration information, detects DCI only in DMRS bundle 1, obtains DCI 2, and then accurately obtains DCI based on joint decoding of DCI 1 and DCI 2.

[0306] It should be understood that the process of the terminal device decoding to obtain DCI 1, DCI 2, and jointly decoding to obtain DCI can be implemented in different ways, and the embodiments of the present application are not limited to this.

[0307] Through the above method, the DMRS bundle of the DCI blindly detected in the previous slot is used to determine the DMRS bundle of the DCI blindly detected in the next slot, which not only improves the accuracy of receiving DCI, but also reduces the number of blind detections of the terminal device in the next slot.

[0308] In another possible implementation, the present invention can also combine the PDCCH repetition process and the DMRS joint estimation process to enhance PDCCH coverage. Specifically, within any slot, the terminal device can blindly detect DCI and perform joint estimation based on more DMRS according to the method described above.

[0309] Specifically, similar to the way of defining the aggregation level to the terminal device 102, the DMRS bundle size, that is, the number of CCEs included in each DMRS bundle, is defined through the first indication information. At the same time, in this scenario five, the linkage relationship between the first target CCE set and the second target CCE set is defined. Once the DMRS bundle size and the linkage relationship are determined, the possible time-frequency resource range of the PDCCH candidate for repeatedly transmitting the DCI is actually determined. The terminal device 102 only needs to blindly detect the repeatedly transmitted DCI within this range.

[0310] For example, Figure 13For example, in the specific implementation process, for slot C, the terminal device can perform joint channel estimation using the DMRS of CCE 0-CCE 3 in DMRS bundle 1-1 to determine the channel matrix of the first candidate control channel, and further decode the DCI to obtain DCI 1. For slot C+1, the terminal device can perform joint channel estimation using the DMRS of CCE 4-CCE 7 in DMRS bundle 1 to determine the channel matrix of the first candidate control channel, and further decode the DCI to obtain DCI 2. DCI 1 and DCI 2 are then combined for joint decoding to obtain more accurate DCI.

[0311] Figure 14 This is another example of a control resource set partition diagram provided in an embodiment of the present application. For example, Figure 14 As shown, the first indication information indicates that the DMRS bundle size is 4 CCEs, determines the division method and range of the DMRS bundle in slot A, as well as the division method and range of the DMRS bundle in slot AB, and the slots for repeated DCI transmission are CCE 0 and CCE 1 of slot A, and CCE 4 and CCE 5 of slot AB.

[0312] During implementation, for slots AB, the terminal device can perform joint channel estimation using the DMRS of CCE 4-CCE7 in DMRS bundle 1-1 to determine the channel matrix of the first candidate control channel, and then decode the DCI to obtain DCI 1. For slot A, the terminal device can perform joint channel estimation using the DMRS of CCE 0-CCE 3 in DMRS bundle 1 to determine the channel matrix of the first candidate control channel, and then decode the DCI to obtain DCI 2. Joint decoding is then performed on DCI 1 and DCI 2 to obtain a more accurate DCI.

[0313] It should be understood that the joint estimation process within a slot can refer to the aforementioned related description and will not be repeated here. Similarly, for the DCI sent in each slot, it is also possible to first perform joint channel estimation with the associated DMRS bundle according to the methods of scenarios three and four, and then jointly decode the repeatedly detected DCI. This will not be repeated here.

[0314] Through the above method, when the terminal device performs channel estimation, each time slot can first obtain the gain of the joint estimation of multiple DMRS in its own frequency domain. If the frequency domain position of the DMRS bundle is the same as the frequency domain position of the PDCCH where the DCI is sent for the first time, the channel gain of the joint estimation in different time domains can also be obtained between the time slots. If the frequency domain position of the DMRS bundle is far away from the frequency domain position of the PDCCH where the DCI is sent for the first time, although the gain of the time domain joint channel estimation cannot be obtained, the frequency diversity gain can be obtained during the joint decoding of the DCI. Therefore, in this scenario five, the size of the time domain offset and the frequency domain offset can be unlimited, and even the time domain offset and the frequency domain offset can be defined as slot-related randomized values, thereby obtaining frequency diversity gain while reducing restrictions on base station scheduling.

[0315] Combination of the above Figures 1 to 14 The method for transmitting information in the embodiment of the present application is described in detail. Figures 15 to 18 The device for determining resources in an embodiment of the present application is described in detail.

[0316] Figure 15 This is a schematic block diagram of an example of an apparatus 1500 for determining resources in an embodiment of the present application. The apparatus 1500 may correspond to (for example, may be applied to or itself be) the terminal device described in the above methods 600 and 1000, and each module or unit in the apparatus 1500 is used to execute each action or processing performed by the terminal device in the above methods 600 and 1000, respectively. Figure 15 As shown, the device 1500 may include: a receiving unit 1510 and a processing unit 1520.

[0317] The receiving unit 1510 is used to receive first configuration information, where the first configuration information includes first indication information, and the first indication information is used to indicate a set of M control channel elements CCE included in a first control resource set, where M is an integer greater than or equal to 1.

[0318] The processing unit 1520 is configured to determine a first candidate control channel, where the first candidate control channel includes K CCEs, where K is an integer greater than or equal to 1.

[0319] The processing unit 1520 is further configured to determine, in the M CCE sets, a first target CCE set where the K CCEs are located.

[0320] The receiving unit 1510 is further configured to receive control information sent by a network device on the first candidate control channel according to a reference signal corresponding to the first target CCE set.

[0321] In a possible implementation, the first indication information includes frequency domain information, time domain information of the first control resource set, and number information N of CCEs included in each of the M CCE sets, where N is an integer greater than or equal to 1.

[0322] In another possible implementation, the first indication information includes index information of CCEs included in each CCE set in the M CCE sets.

[0323] In another possible implementation, the first configuration information also includes second indication information, and the second indication information is used to indicate the precoding method of the reference signal corresponding to the M CCE sets, and the precoding method includes any one of the following situations: all reference signals corresponding to the M CCE sets adopt the same precoding; or the reference signal corresponding to each CCE set in the M CCE sets adopts the same precoding; or the reference signal corresponding to each resource element bundle included in each CCE adopts the same precoding.

[0324] Optionally, the processing unit 1520 is further used to determine, in the reference signal corresponding to the first target CCE set, a target reference signal having the same precoding method as the reference signal corresponding to the K CCEs according to the precoding method; and the receiving unit 1510 is further used to receive control information sent by the network device on the first candidate control channel according to the target reference signal.

[0325] In one possible implementation, the receiving unit 1510 is also used to receive second configuration information, where the second configuration information is used to indicate a second target CCE set that has an association relationship with the first target CCE set; the processing unit 1520 is also used to receive control information sent by the network device on the first candidate control channel based on the reference signal corresponding to the first target CCE set and the reference signal corresponding to the second target CCE set.

[0326] Optionally, the second configuration information includes an offset between the first target CCE set and the second target CCE set, and the offset includes at least one of a time domain offset and a frequency domain offset.

[0327] Optionally, the time domain offset is a timeslot offset and / or a symbol offset, and the frequency domain offset is a CCE offset.

[0328] Optionally, the second configuration information includes a mapping relationship between the M CCE sets and L CCE sets, where the L CCE sets are CCE sets in a second control resource set, and the second control resource set and the first control resource set have different identifiers.

[0329] In a possible implementation, the second configuration information is search space configuration information.

[0330] In another possible implementation, the second configuration information is further used to indicate that the second target CCE set and the first target CCE set adopt the same precoding mode and / or the same precoding.

[0331] In another possible implementation, the first configuration information is control resource set configuration information.

[0332] Specifically, the receiving unit 1510 is used to execute S610, S630 and S660 in method 600, and the processing unit 1520 is used to execute S620, S640 and S650 in method 600; or, the receiving unit 1510 is used to execute S1010, S1030, S1040 and S1080 in method 1000, and the processing unit 1520 is used to execute S1020, S1050, S1060 and S1070 in method 1000. The specific process of each unit executing the above corresponding steps has been described in detail in method 600 and method 1000, and for the sake of brevity, it will not be repeated here.

[0333] Figure 16 This is a schematic block diagram of another example of an apparatus 1600 for determining resources in an embodiment of the present application. The apparatus 1600 may correspond to the base station described in the above method 600, or may be a chip or component applied to the base station. In addition, each module or unit in the apparatus 1600 is used to execute each action or processing performed by the base station in the above method 400, such as Figure 16 As shown, the communication device 1600 may include: a first sending unit 1610 and a second sending unit 1620.

[0334] The first sending unit 1610 is used to send first configuration information, where the first configuration information includes first indication information, where the first indication information is used to indicate a set of M control channel elements (CCEs) included in a first control resource set, where M is an integer greater than or equal to 1.

[0335] The second sending unit 1620 is used to send control information to the terminal device on the first candidate control channel, wherein the first candidate control channel includes K CCEs, the K CCEs are a subset of the first target CCE set in the M CCE set, and the first target CCE set adopts the same precoding method as the reference signal corresponding to the first candidate control channel, and K is an integer greater than or equal to 1.

[0336] In a possible implementation, the first indication information includes frequency domain information, time domain information of the first control resource set, and number information N of CCEs included in each of the M CCE sets, where N is an integer greater than or equal to 1.

[0337] In another possible implementation, the first indication information includes index information of CCEs included in each CCE set in the M CCE sets.

[0338] In another possible implementation, the first configuration information also includes second indication information, and the second indication information is used to indicate the precoding method of the reference signal corresponding to the M CCE sets, and the precoding method includes any one of the following situations: all reference signals corresponding to the M CCE sets adopt the same precoding; or the reference signal corresponding to each CCE set in the M CCE sets adopts the same precoding; or the reference signal corresponding to each resource element bundle included in each CCE adopts the same precoding.

[0339] In a possible implementation, the first target CCE set uses the same precoding method as that of the reference signal corresponding to the first candidate control channel.

[0340] In another possible implementation, the first sending unit 1610 is also used to send second configuration information, where the second configuration information is used to indicate a second target CCE set that is associated with the first target CCE set, and the second target CCE set uses the same precoding method as the reference signal corresponding to the first candidate control channel.

[0341] Optionally, the second configuration information includes an offset between the first target CCE set and the second target CCE set, and the offset includes at least one of a time domain offset and a frequency domain offset.

[0342] Optionally, the time domain offset is a timeslot offset and / or a symbol offset, and the frequency domain offset is a CCE offset.

[0343] Optionally, the second configuration information includes a mapping relationship between the M CCE sets and L CCE sets, where the L CCE sets are CCE sets in a second control resource set, and the second control resource set and the first control resource set have different identifiers.

[0344] In a possible implementation, the second configuration information is search space configuration information.

[0345] In another possible implementation, the second configuration information is further used to indicate that the second target CCE set and the first target CCE set adopt the same precoding mode and / or the same precoding.

[0346] In another possible implementation, the first configuration information is control resource set configuration information.

[0347] Specifically, the first sending unit 1610 is used to execute S610 in method 600, and the second sending unit 1620 is used to execute S630 in method 600; or, the first sending unit 1610 is used to execute S1010 and S1030 in method 1000, and the second sending unit 1620 is used to execute S1040 in method 1000. The specific process of each unit executing the above-mentioned corresponding steps has been described in detail in method 600 and method 1000, and for the sake of brevity, it will not be repeated here.

[0348] Figure 17 1700 is a schematic diagram of the structure of a terminal device provided in an embodiment of the present application. Figure 17 As shown, the terminal device 1700 includes a processor 1710 and a transceiver 1720. Optionally, the terminal device 1700 also includes a memory 1730. The processor 1710, the transceiver 1720, and the memory 1730 communicate with each other through internal connection paths to transmit control and / or data signals. The memory 1730 is used to store computer programs, and the processor 1710 is used to call and execute the computer programs from the memory 1730 to control the transceiver 1720 to send and receive signals.

[0349] The processor 1710 and memory 1730 can be combined into a processing device, and the processor 1710 is used to execute the program code stored in the memory 1730 to implement the functions of the terminal device in the above method embodiment. In specific implementation, the memory 1730 can also be integrated into the processor 1710 or independent of the processor 1710. The transceiver 1720 can be implemented as a transceiver circuit.

[0350] The terminal device may further include an antenna 1740 for transmitting the uplink data or uplink control signaling output by the transceiver 1720 via a wireless signal, or for receiving the downlink data or downlink control signaling and transmitting it to the transceiver 1720 for further processing.

[0351] It should be understood that the apparatus 1700 may correspond to the terminal device in the method 600 or the method 1000 according to the embodiment of the present application, and the apparatus 1700 may also be a chip or component applied to the terminal device. Figure 6Specifically, the memory 1730 is used to store program code, so that when the processor 1710 executes the program code, it controls the processor 1710 to execute S620, S640, and S650 in the method 600, and the transceiver 1720 to execute S610, S630, and S660 in the method 600, or the transceiver 1720 to execute S1010, S1030, S1040, and S1080 in the method 1000, and the processor 1710 to execute S1020, S1050, S1060, and S1070 in the method 1000. The specific process of each unit executing the above corresponding steps has been described in detail and will not be repeated here for the sake of brevity.

[0352] Figure 18 1800 is a schematic diagram of a network device provided in an embodiment of the present application. Figure 18 As shown, the network device 1800 (e.g., a base station) includes a processor 1810 and a transceiver 1820. Optionally, the network device 1800 also includes a memory 1830. The processor 1810, the transceiver 1820, and the memory 1830 communicate with each other via internal connection paths to transmit control and / or data signals. The memory 1830 is used to store computer programs, and the processor 1810 is used to call and execute the computer programs from the memory 1830 to control the transceiver 1820 to send and receive signals.

[0353] The processor 1810 and memory 1830 can be combined into a processing device, and the processor 1810 is used to execute the program code stored in the memory 1830 to implement the functions of the base station in the above method embodiment. In specific implementations, the memory 1830 can also be integrated into the processor 1810 or independent of the processor 1810. The transceiver 1820 can be implemented as a transceiver circuit.

[0354] The above-mentioned network device may further include an antenna 1840 for transmitting downlink data or downlink control signaling output by the transceiver 1820 via wireless signals, or receiving uplink data or uplink control signaling and transmitting them to the transceiver 820 for further processing.

[0355] It should be understood that the device 1800 may correspond to the base station in the method 400 according to the embodiment of the present application, and the device 1800 may also be a chip or component applied to the base station. Figure 6 Method 600 and Figure 10Specifically, the memory 1830 is used to store program code so that the transceiver 1820 is used to execute the processes of S610 and S630 in method 600, or execute the processes of S1010, S1030 and S1040 in method 1000. The specific process of each unit executing the above corresponding steps has been described in detail in method 400 and will not be repeated here for the sake of brevity.

[0356] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in the form of electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0357] Those skilled in the art will clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0358] In the several embodiments provided herein, it should be understood that the disclosed systems, devices, and methods can be implemented in other ways. For example, the device embodiments described above are merely illustrative, and the division of the units is merely a logical functional division. In actual implementation, other divisions may be used, such as combining multiple units or components. Furthermore, the coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device, or unit.

[0359] In addition, each functional unit in each embodiment of the present application may be integrated into one physical entity, each unit may correspond to one physical entity separately, or two or more units may be integrated into one physical entity.

[0360] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

Claims

1. A method for transmitting information, characterized in that: include: Receive first configuration information, where the first configuration information includes first indication information, where the first indication information is used to indicate M control channel element (CCE) sets included in the first control resource set, where M is an integer greater than or equal to 1; each CCE set includes one or more CCEs; and a CCE includes one or more REG bundles; Determine a first candidate control channel, where the first candidate control channel includes K CCEs, where K is an integer greater than or equal to 1; Determine, in the M CCE sets, a first target CCE set in which the K CCEs are located; Control information sent by a network device is received on the first candidate control channel according to a reference signal corresponding to the first target CCE set.

2. The method according to claim 1, characterized in that The first indication information includes frequency domain information, time domain information of the first control resource set, and number information N of CCEs included in each of the M CCE sets, where N is an integer greater than or equal to 1.

3. The method according to claim 1, characterized in that The first indication information includes index information of CCEs included in each of the M CCE sets.

4. The method according to any one of claims 1 to 3, characterized in that The first configuration information also includes second indication information, where the second indication information is used to indicate a precoding mode of a reference signal corresponding to the M CCE sets, and the precoding mode includes any one of the following: All reference signals corresponding to the M CCE sets use the same precoding; or The reference signal corresponding to each CCE set in the M CCE sets adopts the same precoding; or The reference signals corresponding to each resource element bundle included in each CCE adopt the same precoding.

5. The method according to claim 4, characterized in that The receiving, on the first candidate control channel according to the reference signal corresponding to the first target CCE set, control information sent by a network device includes: Determining, according to the precoding mode, a target reference signal having the same precoding mode as the reference signals corresponding to the K CCEs from the reference signals corresponding to the first target CCE set; Control information sent by the network device is received on the first candidate control channel according to the target reference signal.

6. The method according to any one of claims 1 to 3, characterized in that The method further comprises: receiving second configuration information, where the second configuration information is used to indicate a second target CCE set associated with the first target CCE set; Control information sent by the network device is received on the first candidate control channel according to a reference signal corresponding to the first target CCE set and a reference signal corresponding to the second target CCE set.

7. The method according to claim 6, characterized in that The second configuration information includes an offset between the first target CCE set and the second target CCE set, where the offset includes at least one of a time domain offset and a frequency domain offset.

8. The method according to claim 7, characterized in that The time domain offset is a time slot offset and / or a symbol offset, and the frequency domain offset is a CCE offset.

9. The method according to claim 6, characterized in that The second configuration information includes a mapping relationship between the M CCE sets and L CCE sets, where the L CCE sets are CCE sets in a second control resource set, and the second control resource set and the first control resource set have different identifiers.

10. The method according to any one of claims 7 to 9, characterized in that The second configuration information is search space configuration information.

11. The method according to any one of claims 7 to 9, characterized in that The second configuration information is further used to indicate that the second target CCE set and the first target CCE set adopt the same precoding mode and / or the same precoding.

12. The method according to any one of claims 1 to 3, 5, 7 to 9, characterized in that The first configuration information is control resource set configuration information.

13. A method for transmitting information, characterized in that: include: Sending first configuration information, where the first configuration information includes first indication information, where the first indication information is used to indicate M control channel element (CCE) sets included in the first control resource set, where M is an integer greater than or equal to 1; each CCE set includes one or more CCEs; and a CCE includes one or more REG bundles; Control information is sent to a terminal device on a first candidate control channel, wherein the first candidate control channel includes K CCEs, the K CCEs are a subset of a first target CCE set in the M CCE sets, and the first target CCE set adopts the same precoding method as the reference signal corresponding to the first candidate control channel, and K is an integer greater than or equal to 1.

14. The method according to claim 13, characterized in that The first indication information includes frequency domain information, time domain information of the first control resource set, and number information N of CCEs included in each of the M CCE sets, where N is an integer greater than or equal to 1.

15. The method according to claim 13, characterized in that The first indication information includes index information of CCEs included in each of the M CCE sets.

16. The method according to any one of claims 13 to 15, characterized in that The first configuration information also includes second indication information, where the second indication information is used to indicate a precoding mode of a reference signal corresponding to the M CCE sets, and the precoding mode includes any one of the following: All reference signals corresponding to the M CCE sets use the same precoding; or The reference signal corresponding to each CCE set in the M CCE sets adopts the same precoding; or The reference signals corresponding to each resource element bundle included in each CCE adopt the same precoding.

17. The method according to claim 16, characterized in that The first target CCE set uses the same precoding method as the reference signal corresponding to the first candidate control channel.

18. The method according to claim 13, wherein The method further comprises: Second configuration information is sent, where the second configuration information is used to indicate a second target CCE set associated with the first target CCE set, and the second target CCE set adopts the same precoding method as the reference signal corresponding to the first candidate control channel.

19. The method according to claim 18, characterized in that The second configuration information includes an offset between the first target CCE set and the second target CCE set, where the offset includes at least one of a time domain offset and a frequency domain offset.

20. The method according to claim 19, wherein The time domain offset is a time slot offset and / or a symbol offset, and the frequency domain offset is a CCE offset.

21. The method according to claim 18, wherein The second configuration information includes a mapping relationship between the M CCE sets and L CCE sets, where the L CCE sets are CCE sets in a second control resource set, and the second control resource set and the first control resource set have different identifiers.

22. The method according to any one of claims 18 to 19 and 21, characterized in that The second configuration information is search space configuration information.

23. The method according to claim 18 or 19, characterized in that The second configuration information is further used to indicate that the second target CCE set and the first target CCE set adopt the same precoding mode and / or the same precoding.

24. The method according to any one of claims 13 to 15, 17, 19 to 21, characterized in that The first configuration information is control resource set configuration information.

25. A communication device, characterized in that: include: Memory, used to store program instructions and data; A processor, configured to be coupled to the memory and execute instructions in the memory to implement the method according to any one of claims 1 to 24.

26. A chip system, characterized in that: The chip system includes: a memory for storing instructions; A processor is configured to call and execute the instructions from the memory so that a communication device equipped with the chip system executes the method according to any one of claims 1 to 24.

27. A computer-readable storage medium, characterized in that The computer-readable storage medium stores a computer program, and when the computer program is executed, the method according to any one of claims 1 to 24 is implemented.

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