Communication Resource Determination Method, Terminal and Network Side Device

Abstract

The present application discloses a communication resource determination method, a terminal, and a network-side device, belonging to the field of mobile communications. The communication resource determination method according to an embodiment of the present application includes: the network-side device determines a second time domain position and / or a second frequency domain position of a first demodulation reference signal associated with the first physical downlink control channel according to a first time domain position and / or a first frequency domain position corresponding to the first physical downlink control channel; the network-side device sends the first demodulation reference signal associated with the first physical downlink control channel to the terminal according to the second time domain position and / or the second frequency domain position; wherein, the first physical downlink control channel is sent based on a discrete Fourier transform-spread-orthogonal frequency division multiplexing waveform.

Description

Technical Field

[0001] This application belongs to the field of mobile communication technologies, and particularly relates to a method for determining communication resources, a terminal, and a network-side device. Background Art

[0002] In wireless communication, for a certain semiconductor technology, the maximum output power of a radio frequency power amplifier device (Power Amplifier, PA) decreases as the frequency of the wireless signal increases. That is to say, compared with mid-low frequency mobile communication, in a high-frequency communication system, such as when the frequency fc > 52.6 GHz, the maximum output power of the PA is relatively low. Therefore, a signal waveform with a lower "peak-to-average power ratio" needs to be adopted to improve the power amplification efficiency of the PA and thus ensure the power of the output signal.

[0003] In the 5G NR system, the uplink (UL) uses the Discrete Fourier Transform-spread-Orthogonal Frequency Division Multiplexing (DFT-s-OFDM) waveform. The DFT-s-OFDM waveform can allocate different subcarriers to different users to achieve multi-user communication. Therefore, in a high-frequency communication system, using the DFT-s-OFDM waveform in the downlink (DL) is beneficial to the output power of the base station device's signal.

[0004] When using the DFT-s-OFDM waveform to transmit the Physical Downlink Control Channel (PDCCH), since the time-frequency resource position of the Demodulation Reference Signal (DMRS) associated with the PDCCH is not designed, the terminal cannot effectively perform channel estimation and demodulation on the PDCCH, which affects the data transmission efficiency. Summary of the Invention

[0005] Embodiments of this application provide a method for determining communication resources, a terminal, and a network-side device, which can solve the problem that the terminal cannot effectively perform channel estimation and demodulation on the PDCCH of the DFT-s-OFDM waveform.

[0006] In a first aspect, a method for determining communication resources is provided, which is applied to a network-side device. The method includes:

[0007] The network-side device determines the second time domain position and / or the second frequency domain position of a first demodulation reference signal associated with a first physical downlink control channel according to the first time domain position and / or the first frequency domain position of the first physical downlink control channel;

[0008] The network - side device sends a first demodulation reference signal associated with the first physical downlink control channel according to the second time - domain position and / or the second frequency - domain position; wherein, the first physical downlink control channel is transmitted based on a discrete Fourier transform - spread - orthogonal frequency - division multiplexing waveform.

[0009] Wherein, the first time - domain position is the time - domain position of the first physical downlink control channel or the time - domain position of the first control resource set where the first physical downlink control channel is located; the first frequency - domain position is the frequency - domain position of the first physical downlink control channel or the frequency - domain position of the first control resource set where the first physical downlink control channel is located.

[0010] In a second aspect, a communication resource determination device is provided, including:

[0011] A determination module, configured to determine a second time - domain position and / or a second frequency - domain position of a first demodulation reference signal associated with the first physical downlink control channel according to a first time - domain position and / or a first frequency - domain position corresponding to the first physical downlink control channel;

[0012] A sending module, configured to send the first demodulation reference signal associated with the first physical downlink control channel according to the second time - domain position and / or the second frequency - domain position; wherein, the first physical downlink control channel is transmitted based on a discrete Fourier transform - spread - orthogonal frequency - division multiplexing waveform.

[0013] Wherein, the first time - domain position is the time - domain position of the first physical downlink control channel or the time - domain position of the first control resource set where the first physical downlink control channel is located; the first frequency - domain position is the frequency - domain position of the first physical downlink control channel or the frequency - domain position of the first control resource set where the first physical downlink control channel is located.

[0014] In a third aspect, a communication resource determination method is provided, which is applied to a terminal. The method includes:

[0015] The terminal determines a second time - domain position and / or a second frequency - domain position of a first demodulation reference signal associated with the first physical downlink control channel according to a first time - domain position and / or a first frequency - domain position corresponding to the first physical downlink control channel;

[0016] The terminal receives the first demodulation reference signal associated with the first physical downlink control channel according to the second time - domain position and / or the second frequency - domain position; wherein, the first physical downlink control channel is received based on a discrete Fourier transform - spread - orthogonal frequency - division multiplexing waveform.

[0017] Wherein, the first time-domain position is the time-domain position of the first physical downlink control channel or the time-domain position of the first control resource set where the first physical downlink control channel is located; the first frequency-domain position is the frequency-domain position of the first physical downlink control channel or the frequency-domain position of the first control resource set where the first physical downlink control channel is located.

[0018] In a fourth aspect, a communication resource determination device is provided, including:

[0019] A determination module, configured to determine a second time-domain position and / or a second frequency-domain position of a first demodulation reference signal associated with the first physical downlink control channel according to a first time-domain position and / or a first frequency-domain position corresponding to the first physical downlink control channel;

[0020] A receiving module, configured to receive the first demodulation reference signal associated with the first physical downlink control channel according to the second time-domain position and / or the second frequency-domain position; wherein, the first physical downlink control channel is received based on a discrete Fourier transform-spread-orthogonal frequency division multiplexing waveform;

[0021] Wherein, the first time-domain position is the time-domain position of the first physical downlink control channel or the time-domain position of the first control resource set where the first physical downlink control channel is located; the first frequency-domain position is the frequency-domain position of the first physical downlink control channel or the frequency-domain position of the first control resource set where the first physical downlink control channel is located.

[0022] In a fifth aspect, a network-side device is provided, which includes a processor and a memory. The memory stores a program or instruction that can run on the processor, and when the program or instruction is executed by the processor, the steps of the method described in the first aspect are implemented.

[0023] In a sixth aspect, a network-side device is provided, including a processor and a communication interface. Wherein, the processor is configured to determine a second time-domain position and / or a second frequency-domain position of a first demodulation reference signal associated with the first physical downlink control channel according to a first time-domain position and / or a first frequency-domain position corresponding to the first physical downlink control channel, and the communication interface is configured to send the first demodulation reference signal associated with the first physical downlink control channel according to the second time-domain position and / or the second frequency-domain position; wherein, the first physical downlink control channel is sent based on a discrete Fourier transform-spread-orthogonal frequency division multiplexing waveform.

[0024] In a seventh aspect, a terminal is provided, which includes a processor and a memory. The memory stores a program or instruction that can run on the processor, and when the program or instruction is executed by the processor, the steps of the method described in the third aspect are implemented.

[0025] In an eighth aspect, a terminal is provided, including a processor and a communication interface. The processor is configured to determine a second time domain position and / or a second frequency domain position of a first demodulation reference signal associated with the first physical downlink control channel according to a first time domain position and / or a first frequency domain position corresponding to the first physical downlink control channel. The communication interface is configured to receive the first demodulation reference signal associated with the first physical downlink control channel according to the second time domain position and / or the second frequency domain position. The first physical downlink control channel is received based on a discrete Fourier transform - spread - orthogonal frequency division multiplexing waveform.

[0026] In a ninth aspect, a communication resource determination system is provided, including a terminal and a network - side device. The terminal can be configured to execute the steps of the communication resource determination method as described in the third aspect, and the network - side device can be configured to execute the steps of the communication resource determination method as described in the first aspect.

[0027] In a tenth aspect, a readable storage medium is provided. A program or instruction is stored on the readable storage medium. When the program or instruction is executed by a processor, the steps of the method as described in the first aspect are implemented, or the steps of the method as described in the third aspect are implemented.

[0028] In an eleventh aspect, a chip is provided. The chip includes a processor and a communication interface. The communication interface is coupled to the processor. The processor is configured to run a program or instruction to implement the method as described in the first aspect, or implement the method as described in the third aspect.

[0029] In a twelfth aspect, a computer program / program product is provided. The computer program / program product is stored in a storage medium. The computer program / program product is executed by at least one processor to implement the communication resource determination method as described in the first aspect, or implement the steps of the method as described in the third aspect.

[0030] In the embodiments of the present application, according to the first time domain position and / or the first frequency domain position corresponding to the first physical downlink control channel, the second time domain position and / or the second frequency domain position of the first demodulation reference signal associated with the first physical downlink control channel is determined; according to the second time domain position and / or the second frequency domain position, the first demodulation reference signal associated with the first physical downlink control channel is sent to the terminal, so that the terminal can accurately obtain the first demodulation reference signal based on the second time domain position and the second frequency domain position, and successfully perform channel estimation and demodulation on the first physical downlink control channel, thereby improving the data transmission efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic structural diagram of a wireless communication system to which the embodiments of the present application can be applied;

[0032] Figure 2 is a schematic flowchart of a communication resource determination method provided by an embodiment of the present application;

[0033] Figure 3 is a time-frequency position schematic diagram of a communication resource provided by an embodiment of the present application;

[0034] Figure 4 is another time-frequency position schematic diagram of a communication resource provided by an embodiment of the present application;

[0035] Figure 5 is another time-frequency position schematic diagram of a communication resource provided by an embodiment of the present application;

[0036] Figure 6 is another time-frequency position schematic diagram of a communication resource provided by an embodiment of the present application;

[0037] Figure 7 is another time-frequency position schematic diagram of a communication resource provided by an embodiment of the present application;

[0038] Figure 8 is another time-frequency position schematic diagram of a communication resource provided by an embodiment of the present application;

[0039] Figure 9 is another time-frequency position schematic diagram of a communication resource provided by an embodiment of the present application;

[0040] Figure 10 is another time-frequency position schematic diagram of a communication resource provided by an embodiment of the present application;

[0041] Figure 11 is another time-frequency position schematic diagram of a communication resource provided by an embodiment of the present application;

[0042] Figure 12 is another time-frequency position schematic diagram of a communication resource provided by an embodiment of the present application;

[0043] Figure 13 is another time-frequency position schematic diagram of a communication resource provided by an embodiment of the present application;

[0044] Figure 14 is another time-frequency position schematic diagram of a communication resource provided by an embodiment of the present application;

[0045] Figure 15 is another time-frequency position schematic diagram of a communication resource provided by an embodiment of the present application;

[0046] Figure 16 is another time-frequency position schematic diagram of a communication resource provided by an embodiment of the present application;

[0047] Figure 17 It is a schematic structural diagram of a communication resource determination device provided by an embodiment of the present application;

[0048] Figure 18 It is a schematic flow diagram of another communication resource determination method provided by an embodiment of the present application;

[0049] Figure 19 It is a schematic structural diagram of another communication resource determination device provided by an embodiment of the present application;

[0050] Figure 20 It is a schematic structural diagram of a communication device provided by an embodiment of the present application;

[0051] Figure 21 It is a schematic structural diagram of a network - side device for implementing an embodiment of the present application;

[0052] Figure 22 It is a schematic structural diagram of a terminal for implementing an embodiment of the present application. Specific implementation manners

[0053] Next, the technical solutions in the embodiments of the present application will be clearly described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are some, rather than all, of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art belong to the scope of protection of the present application.

[0054] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, rather than to describe a specific order or sequence. It should be understood that such terms can be interchanged under appropriate circumstances so that the embodiments of the present application can be implemented in an order different from those illustrated or described herein, and the objects distinguished by "first" and "second" are generally of the same category, and do not limit the number of objects. For example, the first object can be one or multiple. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / " generally represents an "or" relationship between the associated objects before and after.

[0055] It should be noted that the technology described in the embodiments of this application is not limited to Long Term Evolution (LTE) / LTE-Advanced (LTE-A) systems, but can also be used in other wireless communication systems, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single-carrier Frequency Division Multiple Access (SC-FDMA), and other systems. The terms "system" and "network" in the embodiments of this application are often used interchangeably, and the described technology can be used in the above-mentioned systems and radio technologies, as well as in other systems and radio technologies. The following description describes the New Radio (NR) system for example purposes, and the NR terms are used in most of the following descriptions, but these technologies can also be applied to applications other than NR system applications, such as the 6th Generation (6 th Generation, 6G) communication system.

[0056] Figure 1The block diagram of a wireless communication system to which the embodiments of the present application can be applied is shown. The wireless communication system includes a terminal 11 and a network-side device 12. Among them, the terminal 11 can be a mobile phone, a tablet personal computer, a laptop computer or a notebook computer, a personal digital assistant (PDA), a handheld computer, a netbook, an ultra-mobile personal computer (UMPC), a mobile Internet device (MID), an augmented reality (AR) / virtual reality (VR) device, a robot, a wearable device, a vehicle-mounted device (VUE), a pedestrian terminal (PUE), a smart home (home devices with wireless communication functions, such as refrigerators, TVs, washing machines or furniture, etc.), a game console, a personal computer (PC), a teller machine or a self-service machine, etc. The wearable device includes: a smart watch, a smart bracelet, a smart earphone, a smart glasses, smart jewelry (smart bracelet, smart bracelet, smart ring, smart necklace, smart anklet, smart ankle chain, etc.), a smart wristband, a smart clothing, etc. It should be noted that in the embodiments of the present application, the specific type of the terminal 11 is not limited. The network-side device 12 can include an access network device or a core network device. Among them, the access network device 12 can also be called a radio access network device, a radio access network (RAN), a radio access network function or a radio access network unit. The access network device 12 can include a base station, a WLAN access point or a WiFi node, etc. The base station can be called a Node B, an evolved Node B (eNB), an access point, a base transceiver station (BTS), a radio base station, a radio transceiver, a basic service set (BSS), an extended service set (ESS), a home Node B, a home evolved Node B, a transmitting receiving point (TRP) or some other suitable term in the field. As long as the same technical effect is achieved, the base station is not limited to a specific technical term. It should be noted that in the embodiments of the present application, only the base station in the NR system is taken as an example for introduction, and the specific type of the base station is not limited.The core network device may include but is not limited to at least one of the following: core network node, core network function, Mobility Management Entity (MME), Access and Mobility Management Function (AMF), Session Management Function (SMF), User Plane Function (UPF), Policy Control Function (PCF), Policy and Charging Rules Function (PCRF), Edge Application Server Discovery Function (EASDF), Unified Data Management (UDM), Unified Data Repository (UDR), Home Subscriber Server (HSS), Centralized network configuration (CNC), Network Repository Function (NRF), Network Exposure Function (NEF), Local NEF (L-NEF), Binding Support Function (BSF), Application Function (AF), etc. It should be noted that in the embodiments of this application, only the core network devices in the NR system are taken as examples for introduction, and the specific types of core network devices are not limited.

[0057] Next, in conjunction with the accompanying drawings, the communication resource determination method provided in the embodiments of this application will be described in detail through some embodiments and their application scenarios.

[0058] As Figure 2 shown, the embodiments of this application provide a communication resource determination method. The execution subject of this method is a network-side device. In other words, this method can be executed by software or hardware installed in the network-side device. The network-side device may be an access network device such as a base station. The communication resource determination method may include the following steps.

[0059] Step 210: The network device determines the second time domain position and / or the second frequency domain position of a first Demodulation Reference Signal (DMRS) associated with the first Physical Downlink Control Channel (PDCCH) according to the first time domain position and / or the first frequency domain position corresponding to the first PDCCH.

[0060] Wherein, the first time domain position is the time domain position of the first PDCCH or the time domain position of a first Control Resource Set (CORESET) where the first PDCCH is located; the first frequency domain position is the frequency domain position of the first PDCCH or the frequency domain position of the first CORESET where the first PDCCH is located.

[0061] It should be understood that the first PDCCH in the communication resource determination method of the embodiments of this application is transmitted and received based on the DFT-s-OFDM waveform, and the first DMRS associated with the first PDCCH can be transmitted and received using the CP-OFDM waveform.

[0062] It should be understood that the first DMRS is used for coherent demodulation of the first PDCCH.

[0063] The network device determines the second time domain position of the first DMRS associated with the first PDCCH according to the first time domain position and / or the first frequency domain position corresponding to the first PDCCH, including the time domain position such as the first symbol where the first DMRS is located.

[0064] The PDCCH and the associated DMRS are Time Division Multiplexing (TDM).

[0065] The network device determines the second frequency domain position of the first DMRS associated with the first PDCCH according to the first time domain position and / or the first frequency domain position corresponding to the first PDCCH, including the frequency domain position of the first Physical Resource Block (PRB) where the first DMRS is located, the frequency domain position of the first subcarrier where the first DMRS is located, etc.

[0066] Step 220: The network device transmits the first DMRS associated with the first PDCCH according to the second time domain position and / or the second frequency domain position; wherein, the first PDCCH is transmitted based on the DFT-s-OFDM waveform.

[0067] The terminal receives the first DMRS associated with the first PDCCH based on the second time-domain position and / or the second frequency-domain position, so that the first PDCCH received can be demodulated according to the first DMRS, and the information carried by the PDCCH can be obtained.

[0068] As can be seen from the technical solutions provided by the embodiments of the present invention above, in the embodiments of the present invention, the network-side device determines the second time-domain position and / or the second frequency-domain position of the first demodulation reference signal associated with the first physical downlink control channel according to the first time-domain position and / or the first frequency-domain position corresponding to the first PDCCH; the network-side device sends the first demodulation reference signal associated with the first physical downlink control channel to the terminal according to the second time-domain position and / or the second frequency-domain position, so that the terminal can accurately obtain the first DMRS based on the second time-domain position and the second frequency-domain position, and successfully perform channel estimation and demodulation on the first PDCCH, so as to improve the data transmission efficiency.

[0069] Based on the above embodiments, further, the second time-domain position of the first DMRS in step 210 includes the position of the first symbol, and the first symbol is the symbol where the first demodulation reference signal is located. The determination method of the position of the first symbol can be various, and only several specific implementation manners are given in the embodiments of the present application.

[0070] It should be understood that the symbols involved in the embodiments of the present application and the symbols corresponding to the PDCCH are OFDM symbols of the DFT-s-OFDM waveform, and the symbol where the DMRS is located can be an OFDM symbol of the CP-OFDM waveform.

[0071] The start symbol and symbol length of the first symbol of the first DMRS can be predefined by the protocol or configured by the network side.

[0072] In one implementation manner, the first symbol is a specified symbol before or after the second symbol, and the second symbol is the symbol where the first PDCCH is located.

[0073] The start symbol and symbol length of the second symbol can be predefined by the protocol or configured by the network side.

[0074] Further, the position of the specified symbol is predefined by the protocol or configured by the network side.

[0075] Further, the specified symbol is N2 symbols starting from the N1th symbol, that is, the first symbol where the first DMRS is located starts from the N1th symbol, and the symbol length occupied by the first DMRS is N2, and the N1 and N2 are predefined by the protocol or configured by the network side.

[0076] The first symbol is N2 symbols starting from the N1-th symbol before the first OFDM symbol included in the second symbol; or, the first symbol is N2 symbols starting from the N1-th symbol after the last OFDM symbol included in the second symbol.

[0077] For example, as Figure 3 shown, the second symbol of the first PDCCH includes one OFDM symbol, the first symbol of the first DMRS is one OFDM symbol before the second symbol, and the first symbol is N2 = 1 OFDM symbol starting from the N1 = 1-th symbol before the second symbol.

[0078] As Figure 4 shown, the second symbol of the first PDCCH includes one OFDM symbol, the first symbol of the first DMRS is one OFDM symbol after the second symbol, and the first symbol is N2 = 1 OFDM symbol starting from the N1 = 1-th symbol after the second symbol.

[0079] The frequency domain position of the first DMRS can be set according to actual needs, and the first DMRS can occupy all or part of the subcarriers. Figure 3 and Figure 4 Three examples are given in both, where the first DMRS occupies all subcarriers in 3a and 4a, and occupies part of the subcarriers in 3b, 3c and 4b, 4c.

[0080] In another embodiment, the first symbol is a specified symbol before or after the third symbol, and the third symbol is the symbol where the first CORESET is located.

[0081] The starting symbol and symbol length of the third symbol can be predefined by the protocol or configured by the network side.

[0082] The first symbol is N2 symbols starting from the N1-th symbol before the first OFDM symbol included in the third symbol; or, the first symbol is N2 symbols starting from the N1-th symbol after the last OFDM symbol included in the third symbol.

[0083] For example, as Figure 3 shown, the third symbol of the first CORESET includes one OFDM symbol, the first symbol of the first DMRS is one OFDM symbol before the third symbol, and the first symbol is N2 = 1 OFDM symbol starting from the N1 = 1-th symbol after the third symbol.

[0084] As Figure 4As shown, the third symbol of the first CORESET includes one OFDM symbol, the first symbol of the first DMRS is one OFDM symbol after the third symbol, and the first symbol is N2 = 1 OFDM symbols starting from the N1 = 1st symbol after the third symbol.

[0085] In another embodiment, when the second symbol is discontinuous, the first symbol is a specified symbol between the second symbols.

[0086] The first symbol is N2 symbols starting from the N1st symbol among the OFDM symbols included in the second symbol.

[0087] For example, as Figure 5 shown, the second symbol of the first PDCCH includes two discontinuous OFDM symbols, the first symbol of the first DMRS is one OFDM symbol between the second symbols, and the first symbol is N2 = 1 OFDM symbols starting from the N1 = 1st symbol between the second symbols.

[0088] The frequency-domain position of the first DMRS can be set according to actual needs, and the first DMRS can occupy all or part of the subcarriers. Figure 5 Three examples are given in all of them. In 5a, the first DMRS occupies all subcarriers, and in 5b and 5c, it occupies part of the subcarriers.

[0089] In another embodiment, when the third symbol is discontinuous, it is a specified symbol between the third symbols.

[0090] For example, as Figure 5 shown, the third symbol of the first CORESET includes two discontinuous OFDM symbols, the first symbol of the first DMRS is one OFDM symbol between the third symbols, and the first symbol is N2 = 1 OFDM symbols starting from the N1 = 1st symbol between the third symbols.

[0091] In another embodiment, the first symbol is a specified symbol in the third symbol.

[0092] The first symbol is N2 symbols starting from the N1st symbol among the OFDM symbols included in the third symbol.

[0093] For example, as Figure 6 shown, the third symbol of the first CORESET includes two continuous OFDM symbols, the first symbol of the first DMRS is one of the OFDM symbols of the third symbol, and the first symbol is N2 = 1 OFDM symbols starting from the N1 = 1st symbol of the third symbol.

[0094] As shown Figure 7 in the figure, the third symbol of the first CORESET includes two consecutive OFDM symbols, the first symbol of the first DMRS is one of the OFDM symbols of the third symbol, and the first symbol is N2 = 1 OFDM symbol starting from the N1 = 2nd symbol of the third symbol.

[0095] As shown Figure 8 in the figure, the third symbol of the first CORESET includes three consecutive OFDM symbols, the first symbol of the first DMRS is one of the OFDM symbols of the third symbol, and the first symbol is N2 = 1 OFDM symbol starting from the N1 = 2nd symbol of the third symbol.

[0096] The frequency domain position of the first DMRS can be set according to actual needs, and the first DMRS can occupy all or part of the subcarriers. Figure 6 、 Figure 7 and Figure 8 give examples of three methods respectively. In 6a, 7a and 8a, the first DMRS occupies all subcarriers, and in 6b, 6c, 7b, 7c and 8b, 8c, it occupies part of the subcarriers.

[0097] In another embodiment, the first symbol is a specified symbol between the second symbol and the fourth symbol, and the fourth symbol is the symbol where the second PDCCH is located; wherein, the second PDCCH is the PDCCH paired with the first PDCCH.

[0098] The starting symbol and symbol length of the fourth symbol can be predefined by the protocol or configured by the network side.

[0099] The first symbol is N2 = 1 OFDM symbol starting from the N1 = 1st symbol between the OFDM symbols included in the second symbol and the OFDM symbols included in the fourth symbol.

[0100] For example, as shown Figure 9 in the figure, the second symbol of the first PDCCH and the fourth symbol of the second PDCCH include one OFDM symbol, the first symbol of the first DMRS is one OFDM symbol between the second symbol and the fourth symbol, and the first symbol is N2 = 1 OFDM symbol starting from the N1 = 1st symbol between the second symbol and the fourth symbol.

[0101] As shown Figure 10As shown, the second symbol of the first PDCCH and the fourth symbol of the second PDCCH include two OFDM symbols. The first symbol of the first DMRS is one OFDM symbol between the second symbol and the fourth symbol, and the first symbol is N2 = 1 OFDM symbol starting from the N1 = 1st symbol between the second symbol and the fourth symbol.

[0102] As Figure 11 As shown, the second symbol of the first PDCCH and the fourth symbol of the second PDCCH include one OFDM symbol and two OFDM symbols respectively. Among them, in 11a and 11c, the second symbol includes one OFDM symbol and the fourth symbol includes two OFDM symbols; in 11b and 11d, the second symbol includes two OFDM symbols and the fourth symbol includes one OFDM symbol. The first symbol of the first DMRS is one OFDM symbol between the second symbol and the fourth symbol, and the first symbol is N2 = 1 OFDM symbol starting from the N1 = 1st symbol between the second symbol and the fourth symbol.

[0103] The frequency domain position of the first DMRS can be set according to actual needs, and the first DMRS can occupy all or part of the subcarriers. Figures 9 - 11 Only two of the cases where the first DMRS and the second DMRS associated with the second PDCCH occupy the same symbol are given. The first DMRS and the second DMRS occupy different subcarriers respectively.

[0104] It should be understood that the first DMRS and the second DMRS can also occupy different symbols or partially occupy the same symbol.

[0105] In another embodiment, the first symbol is a specified symbol between the third symbol and the fifth symbol, and the fifth symbol is the symbol where the second CORESET is located; wherein, the second CORESET is a control resource set paired with the first CORESET.

[0106] The first symbol is N2 = 1 OFDM symbol starting from the N1 = 1st symbol between the OFDM symbols included in the third symbol and the OFDM symbols included in the fifth symbol.

[0107] The starting symbol and symbol length of the fifth symbol can be predefined by the protocol or configured by the network side.

[0108] For example, as Figure 9As shown, the third symbol of the first CORESET and the fifth symbol of the second CORESET both include one OFDM symbol. The first symbol of the first DMRS is one OFDM symbol between the third symbol and the fifth symbol, and the first symbol is N2 = 1 OFDM symbol starting from the N1 = 1st symbol between the third symbol and the fifth symbol.

[0109] As Figure 10 As shown, the third symbol of the first CORESET and the fifth symbol of the second CORESET both include two OFDM symbols. The first symbol of the first DMRS is one OFDM symbol between the third symbol and the fifth symbol, and the first symbol is N2 = 1 OFDM symbol starting from the N1 = 1st symbol between the third symbol and the fifth symbol.

[0110] As Figure 11 As shown, the third symbol of the first CORESET and the fifth symbol of the second CORESET respectively include one OFDM symbol and two OFDM symbols. Among them, in 11a and 11c, the third symbol includes one OFDM symbol and the fifth symbol includes two OFDM symbols; in 11b and 11d, the third symbol includes two OFDM symbols and the fifth symbol includes one OFDM symbol. The first symbol of the first DMRS is one OFDM symbol between the third symbol and the fifth symbol, and the first symbol is N2 = 1 OFDM symbol starting from the N1 = 1st symbol between the third symbol and the fifth symbol.

[0111] The frequency domain position of the first DMRS can be set according to actual needs, and the first DMRS can occupy all or part of the subcarriers. Figures 9 - 11 Only two of the cases where the first DMRS and the third DMRS associated with the second CORESET occupy the same symbol are given. The first DMRS and the third DMRS respectively occupy different subcarriers.

[0112] It should be understood that the first DMRS and the third DMRS can also occupy different symbols or partially occupy the same symbol.

[0113] In another embodiment, the first symbol is a specified symbol in the fifth symbol.

[0114] The first symbol is N2 = 1 OFDM symbol starting from the N1 = 1st symbol among the OFDM symbols included in the fifth symbol.

[0115] As Figure 12As shown, the third symbol of the first CORESET includes one OFDM symbol, the fifth symbol of the second CORESET includes two OFDM symbols, the first symbol of the first DMRS is one OFDM symbol in the fifth symbol, and the first symbol is N2 = 1 OFDM symbol starting from the N1 = 1st symbol in the fifth symbol.

[0116] As Figure 13 As shown, the third symbol of the first CORESET includes two OFDM symbols, the fifth symbol of the second CORESET includes one OFDM symbol, the first symbol of the first DMRS is one OFDM symbol in the third symbol, and the first symbol is N2 = 1 OFDM symbol starting from the N1 = 2nd symbol in the third symbol.

[0117] As Figure 14 As shown, the third symbol of the first CORESET and the fifth symbol of the second CORESET both include two consecutive OFDM symbols, and the third symbol and the fifth symbol overlap in one OFDM symbol. The first symbol is one OFDM symbol that overlaps between the second symbol and the fourth symbol. The first symbol is N2 = 1 OFDM symbol starting from the N1 = 1st symbol in the fifth symbol; or the first symbol is N2 = 1 OFDM symbol starting from the N1 = 2nd symbol in the third symbol.

[0118] The frequency domain position of the first DMRS can be set according to actual needs, and the first DMRS can occupy all or part of the subcarriers. Figures 12 - 14 Only two of the cases where the first DMRS and the third DMRS occupy the same symbol are given. The first DMRS and the third DMRS occupy the same symbol and occupy different subcarriers respectively.

[0119] It should be understood that the symbol lengths occupied by each PDCCH and each CORESET can be predefined by the protocol or configured by the network side, and can also be set to 3 or 4, etc.

[0120] As can be seen from the technical solutions provided by the embodiments of the present invention above, in the embodiments of the present invention, the network side device determines the position of the symbol where the first DMRS associated with the first PDCCH is located according to a variety of preset methods, so that the terminal can accurately obtain the first DMRS based on the second time domain position and successfully perform channel estimation and demodulation on the first PDCCH.

[0121] Based on the above embodiments, further, the second frequency domain position of the first DMRS in step 210 includes the index value (PRB index) of the first PRB, where the first PRB is the PRB where the first DMRS is located; the first PRB index is determined by at least one of the following:

[0122] The index value (RB index) of the resource block (ResourceBlock, RB) where the first PDCCH is located;

[0123] The RB index of the resource block where the first CORESET is located.

[0124] In one embodiment, the first PRB index may be the same as the RB index of the first PDCCH, i.e., full coverage, or there is a corresponding relationship with the PB index of the first PDCCH, i.e., partial coverage.

[0125] In another embodiment, the first PRB index may be the same as the RB index of the first CORESET, i.e., full coverage, or there is a corresponding relationship with the RB index of the first CORESET, i.e., partial coverage.

[0126] In one embodiment, the first DMRS is transmitted on all or part of the subcarriers where the first PRB is located.

[0127] In one embodiment, the second frequency domain position further includes the index value of the first subcarrier, where the first subcarrier is the subcarrier occupied by the first DMRS; the index value of the first subcarrier is determined by the first indicator N3 and the second indicator N4; where the first indicator N3 is used to indicate the subcarrier interval, i.e., the number of intervals between subcarriers in the first subcarrier can be obtained through N3, and the second indicator is used to indicate the offset value of the first subcarrier.

[0128] Further, the first indicator and the second indicator are predefined by the protocol or configured by the network side.

[0129] In one embodiment, the index value k of the first subcarrier is determined by the following formula:

[0130] k = N3 × n + N4, n = 0, 1,...

[0131] Where N3 is the first indicator and N4 is the second indicator.

[0132] Such as Figures 3 - 8As shown, for the index value k of the first subcarrier in 3a, 4a, 5a, 6a, 7a, and 8a, N3 = 1 and N4 = 0; for the index value k of the first subcarrier in 3b, 4b, 5b, 6b, 7b, and 8b, N3 = 2 and N4 = 0; for the index value k of the first subcarrier in 3c, 4c, 5c, 6c, 7c, and 8c, N3 = 2 and N4 = 1.

[0133] As Figures 9 - 14 shown, for the index value k of the first subcarrier in 9a, 10a, 11a, 11d, 12a, 13a, 14a, k = N3 × n + N4, where n = 0, 1, …, with N3 = 2 and N4 = 1, and for the index value k' of the subcarrier corresponding to the second DMRS or the third DMRS, k' = N3' × n + N4', where n = 0, 1, …, with N3' = 2 and N4' = 0; for the index value k of the first subcarrier in 9b, 10b, 11b, 11c, 12b, 13b, 14b, N3 = 2 and N4 = 0, and for the index value k' of the subcarrier corresponding to the second DMRS or the third DMRS, N3' = 2 and N4' = 1.

[0134] Furthermore, the index value or the second indicator of the first subcarrier is determined by at least one of the following:

[0135] The relative position relationship between the position of the first DMRS in the time domain and the position of the first symbol where the first PDCCH is located; as Figure 3 and Figure 4 shown, when the first symbol is before the first PDCCH, it can be set to k or N4 corresponding to 3b, and when the first symbol is after the first PDCCH, it can be set to k or N4 corresponding to 4c;

[0136] The relative position relationship between the position of the first DMRS in the time domain and the position of the first symbol where the first CORESET is located; as Figure 3 and Figure 4 shown, when the first symbol is before the first CORESET, it can be set to k or N4 corresponding to 3c, and when the first symbol is after the first CORESET, it can be set to k or N4 corresponding to 4b;

[0137] The identifier of the first PDCCH; as Figure 3 shown, according to the identifier of the first PDCCH, k or N4 corresponding to 3a, 3b, or 3c can be set respectively;

[0138] The minimum or maximum value of the index value (CCEindex) of the control channel element (Control Channel Element, CCE) occupied by the first PDCCH; asFigure 3 As shown, according to the minimum or maximum value of the index value of the CCE occupied by the first PDCCH, k or N4 corresponding to 3a, 3b, or 3c can be set respectively;

[0139] The identifier of the search space corresponding to the first PDCCH; such as Figure 3 As shown, according to the identifier of the search space corresponding to the first PDCCH, k or N4 corresponding to 3a, 3b, or 3c can be set respectively;

[0140] The identifier of the first CORESET; such as Figure 3 As shown, according to the identifier of the first CORESET, k or N4 corresponding to 3a, 3b, or 3c can be set respectively.

[0141] It can be seen from the technical solutions provided by the embodiments of the present invention above that by determining the second frequency domain position of the first DMRS associated with the first PDCCH, the terminal can accurately obtain the first DMRS based on the second frequency domain position and successfully perform channel estimation and demodulation on the first PDCCH.

[0142] Based on the above embodiments, further, determining the second time domain position and / or the second frequency domain position in step 210 can be further combined with the time domain position and / or the frequency domain position of the second DMRS of the second PDCCH paired with the first PDCCH, or the time domain position and / or the frequency domain position of the third DMRS of the second CORESET paired with the first CORESET.

[0143] In one implementation manner, the second time domain position is the same as the time domain position of the second DMRS of the second PDCCH; wherein, the second PDCCH is the PDCCH paired with the first PDCCH. Specifically, it includes: all or part of the symbol positions where the first DMRS is located are the same as the symbol positions where the second DMRS is located.

[0144] In one implementation manner, the second frequency domain position is different from the frequency domain position of the second DMRS of the second PDCCH.

[0145] For example, as Figures 9 - 11As described above, the second symbol of the first PDCCH and the fourth symbol of the second PDCCH may each occupy one or two OFDM symbols. The symbol positions where the first DMRS is located are the same as those where the second DMRS is located, and are the N2 = 1 OFDM symbols starting from the N1 = 1st symbol between the second symbol and the fourth symbol. However, the subcarriers occupied by the first DMRS and the subcarriers occupied by the second DMRS are different. The subcarriers occupied by the first DMRS are k = N3 × n + N4, where n = 0, 1, …; the subcarriers occupied by the second DMRS are k′ = N3′ × n + N4′, where n = 0, 1, … . Among them, in 9a, 10a, 11a, 11d, N3 = 2, N4 = 1, N3′ = 2, N4′ = 0; in 9b, 10b, 11b, 11c, N3 = 2, N4 = 0, N3′ = 2, N4′ = 1.

[0146] It should be understood that the first PDCCH may have a pairing relationship with multiple PDCCHs, that is, there are multiple second PDCCHs. Then, the second time domain position is the same as the time domain position of the second DMRS of the second PDCCH, including: the symbol positions where the first DMRS is located are all or partially the same as the symbol positions where each second DMRS is located.

[0147] Taking the case where the first PDCCH is paired with two second PDCCHs as an example for illustration, the first PDCCH is paired with the second PDCCH-1, and the first PDCCH is paired with the second PDCCH-2. The second DMRS-1 is the DMRS corresponding to the second PDCCH-1, and the second DMRS-2 is the DMRS corresponding to the second PDCCH-2.

[0148] Such as Figure 15As shown, the second symbol of the first PDCCH, the fourth symbol of the second PDCCH-1, and the fourth symbol of the second PDCCH-2 each include one OFDM symbol. The symbol position where the first DMRS is located is partially the same as the symbol position where the second DMRS-1 is located and partially the same as the symbol position where the second DMRS-2 is located. However, the subcarriers occupied by the first DMRS and the second DMRS-1 are different, the subcarriers occupied by the first DMRS and the second DMRS-2 are different, and the subcarriers occupied by the first DMRS in different OFDM symbols are also different. In 15a, for the subcarrier k corresponding to the first DMRS in the symbol where the second DMRS-1 is located, N3 = 2 and N4 = 0; for the subcarrier k' corresponding to the second DMRS-1, N3' = 2 and N4' = 1. In the symbol where the second DMRS-2 is located, for the subcarrier k corresponding to the first DMRS, N3 = 2 and N4 = 1; for the subcarrier k' corresponding to the second DMRS-2, N3' = 2 and N4' = 0. In 15a, for the subcarrier k corresponding to the first DMRS in the symbol where the second DMRS-1 is located, N3 = 2 and N4 = 1; for the subcarrier k' corresponding to the second DMRS-1, N3' = 2 and N4' = 0. In the symbol where the second DMRS-2 is located, for the subcarrier k corresponding to the first DMRS, N3 = 2 and N4 = 0; for the subcarrier k' corresponding to the second DMRS-2, N3' = 2 and N4' = 1.

[0149] As Figure 16 As shown, the third symbol of the first PDCCH, the fourth symbol of the second PDCCH-1, and the fourth symbol of the second PDCCH-2 each include one OFDM symbol. The symbol positions where the first DMRS, the second DMRS-1, and the second DMRS-2 are located are all the same. The subcarriers occupied by the first DMRS are different from those occupied by the second DMRS-1 and the second DMRS-2. In 16a, for the subcarrier k corresponding to the first DMRS, N3 = 2 and N4 = 1; for the subcarrier k' corresponding to the second DMRS-1, N3' = 2 and N4' = 0; for the subcarrier k' corresponding to the second DMRS-2, N3' = 2 and N4' = 0. In 16b, for the subcarrier k corresponding to the first DMRS, N3 = 2 and N4 = 0; for the subcarrier k' corresponding to the second DMRS-1, N3' = 2 and N4' = 1; for the subcarrier k' corresponding to the second DMRS-2, N3' = 2 and N4' = 1.

[0150] In another embodiment, the second time domain position is the same as the time domain position of the third DMRS of the second CORESET; wherein, the second CORESET is a control resource set paired with the first CORESET. Specifically, it includes: all or part of the symbol positions where the first DMRS is located are the same as the symbol positions where the third DMRS is located.

[0151] In another embodiment, the second frequency domain position is different from the frequency domain position of the third DMRS of the second CORESET.

[0152] For example, as Figures 9 - 14 described, the third symbol of the first CORESET and the fifth symbol of the second CORESET may each include one or two OFDM symbols. The symbol position where the first DMRS is located is the same as the symbol position where the third DMRS is located, which is the N2 = 1 OFDM symbol starting from the N1 = 1st symbol between the third symbol and the fifth symbol, or the N2 = 1 OFDM symbol starting from the N1 = 2nd symbol in the third symbol, or the N2 = 1 OFDM symbol starting from the N1 = 1st symbol in the fifth symbol. However, the subcarriers occupied by the first DMRS and the third DMRS are different. The subcarriers occupied by the first DMRS are k = N3×n + N4, n = 0, 1,...; the subcarriers occupied by the third DMRS are k″ = N3″×n + N4″, n = 0, 1,.... Among them, in 9a, 10a, 11a, 11d, 12a, 13a, 14a, N3 = N3″ = 2, N4 = 1, N4″ = 0; in 9b, 10b, 11b, 11c, 12b, 13b, 14b, N3 = 2, N4 = 0, N3″ = 2, N4″ = 1.

[0153] It should be understood that the first CORESET can have a pairing relationship with multiple CORESETS, that is, there are multiple second CORESETS. Then, the second time domain position is the same as the time domain position of the third DMRS of the second CORESET, including: all or part of the symbol positions where the first DMRS is located are the same as the symbol positions where each third DMRS is located.

[0154] Taking the case where the first CORESET is paired with two second CORESETS as an example for illustration, the first CORESET is paired with the second CORESET - 1, and the first CORESET is paired with the second CORESET - 2. The third DMRS - 1 is the DMRS corresponding to the second CORESET - 1, and the third DMRS - 2 is the DMRS corresponding to the second CORESET - 2.

[0155] As Figure 15As shown, the third symbol of the first CORESET, and the fifth symbols of the second CORESET-1 and the second CORESET-2 all include one OFDM symbol. The symbol positions where the first DMRS is located are partially the same as those where the third DMRS-1 is located, and partially the same as those where the third DMRS-2 is located. In 15a, for the subcarrier k corresponding to the first DMRS in the symbol where the third DMRS-1 is located, N3 = 2 and N4 = 0; for the subcarrier k'' corresponding to the third DMRS-1, N3'' = 2 and N4'' = 1. In the symbol where the third DMRS-2 is located, for the subcarrier k corresponding to the first DMRS, N3 = 2 and N4 = 1; for the subcarrier k'' corresponding to the third DMRS-2, N3'' = 2 and N4'' = 0. In 15a, for the subcarrier k corresponding to the first DMRS in the symbol where the third DMRS-1 is located, N3 = 2 and N4 = 1; for the subcarrier k'' corresponding to the third DMRS-1, N3'' = 2 and N4'' = 0. In the symbol where the third DMRS-2 is located, for the subcarrier k corresponding to the first DMRS, N3 = 2 and N4 = 0; for the subcarrier k'' corresponding to the third DMRS-2, N3'' = 2 and N4'' = 1.

[0156] As Figure 16 shown, the third symbol of the first CORESET, and the fifth symbols of the second CORESET-1 and the second CORESET-2 all include one OFDM symbol. The symbol positions where the first DMRS is located, the third DMRS-1 is located, and the third DMRS-2 is located are all the same. However, the subcarriers occupied by the first DMRS, the third DMRS-1, and the third DMRS-2 are all different. In 16a, for the subcarrier k corresponding to the first DMRS, N3 = 2 and N4 = 1; for the subcarrier k'' corresponding to the third DMRS-1, N3'' = 2 and N4'' = 0; for the subcarrier k'' corresponding to the third DMRS-2, N3'' = 2 and N4'' = 0. In 16b, for the subcarrier k corresponding to the first DMRS, N3 = 2 and N4 = 0; for the subcarrier k'' corresponding to the third DMRS-1, N3'' = 2 and N4'' = 1; for the subcarrier k'' corresponding to the third DMRS-2, N3'' = 2 and N4'' = 1.

[0157] As can be seen from the technical solutions provided by the embodiments of the present invention above, in the embodiments of the present invention, by setting the time domain position of the first DMRS to be the same as the time domain position of the second DMRS or the same as the time domain position of the third DMRS, and setting the frequency domain position of the first DMRS to be different from the frequency domain position of the second DMRS or different from the frequency domain position of the third DMRS, the DMRSs of multiple PDCCHs occupy the same symbol in the time domain, reducing the overhead of transmitting DMRS and saving communication resources.

[0158] For the communication resource determination method provided by the embodiments of the present application, the execution subject may be a communication resource determination device. In the embodiments of the present application, taking the communication resource determination device as an example to execute the communication resource determination method, the communication resource determination device provided by the embodiments of the present application is described.

[0159] As Figure 17 shown, the communication resource determination device includes: a determination module 171 and a sending module 172. Among them, the determination module 171 is configured to determine the second time domain position and / or the second frequency domain position of the first demodulation reference signal associated with the first physical downlink control channel according to the first time domain position and / or the first frequency domain position corresponding to the first physical downlink control channel; the sending module 172 is configured to send the first demodulation reference signal associated with the first physical downlink control channel to the terminal according to the second time domain position and / or the second frequency domain position; wherein, the first physical downlink control channel is sent based on the discrete Fourier transform - spread - orthogonal frequency division multiplexing waveform;

[0160] Among them, the first time domain position is the time domain position of the first physical downlink control channel or the time domain position of the first control resource set where the first physical downlink control channel is located; the first frequency domain position is the frequency domain position of the first physical downlink control channel or the frequency domain position of the first control resource set where the first physical downlink control channel is located.

[0161] As can be seen from the technical solutions provided by the embodiments of the present invention above, in the embodiments of the present invention, according to the first time domain position and / or the first frequency domain position corresponding to the first PDCCH, the second time domain position and / or the second frequency domain position of the first demodulation reference signal associated with the first physical downlink control channel is determined; according to the second time domain position and / or the second frequency domain position, the first demodulation reference signal associated with the first physical downlink control channel is sent to the terminal, so that the terminal can accurately obtain the first DMRS based on the second time domain position and the second frequency domain position, and successfully perform channel estimation and demodulation on the first PDCCH, so as to improve the data transmission efficiency.

[0162] Based on the above embodiments, further, the second time-domain position includes the position of a first symbol, where the first symbol is the symbol in which the first demodulation reference signal is located; the position of the first symbol includes at least one of the following:

[0163] a specified symbol before or after a second symbol, where the second symbol is the symbol in which the first physical downlink control channel is located;

[0164] a specified symbol before or after a third symbol, where the third symbol is the symbol in which the first control resource set is located;

[0165] in the case where the second symbol is discontinuous, a specified symbol between the second symbols;

[0166] in the case where the third symbol is discontinuous, a specified symbol between the third symbols;

[0167] a specified symbol in the third symbol;

[0168] a specified symbol between the second symbol and a fourth symbol, where the fourth symbol is the symbol in which a second physical downlink control channel is located;

[0169] a specified symbol between the third symbol and a fifth symbol, where the fifth symbol is the symbol in which a second control resource set is located;

[0170] a specified symbol in the fifth symbol;

[0171] wherein, the second physical downlink control channel is a physical downlink control channel paired with the first physical downlink control channel, and the second control resource set is a control resource set paired with the first control resource set.

[0172] Further, the position of the specified symbol is predefined by the protocol or configured by the network side.

[0173] Further, the specified symbol is N2 symbols starting from the N1th symbol, where N1 and N2 are predefined by the protocol or configured by the network side.

[0174] As can be seen from the technical solutions provided by the embodiments of the present invention above, the embodiments of the present invention determine the position of the symbol in which the first DMRS associated with the first PDCCH is located according to a variety of preset manners, so that the terminal can accurately obtain the first DMRS based on the second time-domain position and successfully perform channel estimation and demodulation on the first PDCCH.

[0175] Based on the above embodiments, further, the second frequency-domain position includes the index value of the first physical resource block, where the first physical resource block is the physical resource block where the first demodulation reference signal is located; the index value of the first physical resource block is determined by at least one of the following:

[0176] The index value of the resource block where the first physical downlink control channel is located;

[0177] The index value of the resource block where the first control resource set is located.

[0178] Further, the index value of the first physical resource block is the same as at least one of the following:

[0179] The index value of the resource block of the first physical downlink control channel;

[0180] The index value of the resource block of the first control resource set.

[0181] Further, the first demodulation reference signal is transmitted on all or part of the subcarriers in the first physical resource block.

[0182] Further, the second frequency-domain position further includes the index value of the first subcarrier, where the first subcarrier is the subcarrier occupied by the first demodulation reference signal; the index value of the first subcarrier is determined by a first index and a second index; wherein, the first index is used to indicate the subcarrier spacing, and the second index is used to indicate the deviation value of the first subcarrier.

[0183] Further, the first index and the second index are predefined by the protocol or configured by the network side.

[0184] Further, the index value k of the first subcarrier is determined by the following formula:

[0185] k = N3 × n + N4, n = 0, 1, …

[0186] Wherein, N3 is the first index and N4 is the second index.

[0187] Further, the index value of the first subcarrier or the second index is determined by at least one of the following:

[0188] The relative position relationship between the position of the first demodulation reference signal in the time domain and the position of the first symbol where the first physical downlink control channel is located;

[0189] The relative position relationship between the position of the first demodulation reference signal in the time domain and the position of the first symbol where the first control resource set is located;

[0190] The identifier of the first physical downlink control channel;

[0191] The minimum or maximum value of the index of the control channel element occupied by the first physical downlink control channel;

[0192] The identification of the search space corresponding to the first physical downlink control channel;

[0193] The identification of the first control resource set.

[0194] As can be seen from the technical solutions provided by the embodiments of the present invention above, by determining the second frequency-domain position of the first DMRS associated with the first PDCCH, the terminal can accurately obtain the first DMRS based on the second frequency-domain position and successfully perform channel estimation and demodulation on the first PDCCH.

[0195] Based on the above embodiments, further, the second time-domain position is at least one of the following:

[0196] The same as the time-domain position of the second demodulation reference signal of the second physical downlink control channel;

[0197] The same as the time-domain position of the third demodulation reference signal of the second control resource set;

[0198] Wherein, the second physical downlink control channel is a physical downlink control channel paired with the first physical downlink control channel, and the second control resource set is a control resource set paired with the first control resource set.

[0199] Further, the second frequency-domain position is at least one of the following:

[0200] Different from the frequency-domain position of the second demodulation reference signal of the second physical downlink control channel;

[0201] Different from the frequency-domain position of the third demodulation reference signal of the second control resource set;

[0202] Wherein, the second physical downlink control channel is a physical downlink control channel paired with the first physical downlink control channel, and the second control resource set is a control resource set paired with the first control resource set.

[0203] As can be seen from the technical solutions provided by the embodiments of the present invention above, by setting the time-domain position of the first DMRS to be the same as the time-domain position of the second DMRS or the same as the time-domain position of the third DMRS, and setting the frequency-domain position of the first DMRS to be different from the frequency-domain position of the second DMRS or different from the frequency-domain position of the third DMRS, the DMRSs of multiple PDCCHs occupy the same symbols in the time domain, reducing the overhead of transmitting DMRS and saving communication resources.

[0204] The communication resource determination device in the embodiments of the present application may be an electronic device, such as an electronic device with an operating system, or a component in an electronic device, such as an integrated circuit or a chip. The electronic device may be a terminal or other devices other than terminals. Exemplarily, the terminal may include, but is not limited to, the types of the above-listed terminal 11, and other devices may be a server, a Network Attached Storage (NAS), etc., which are not specifically limited in the embodiments of the present application.

[0205] The communication resource determination device provided in the embodiments of the present application can implement Figures 2 to 16 each process implemented by the method embodiments and achieve the same technical effects. To avoid repetition, details are not described here again.

[0206] As Figure 18 shown, the embodiments of the present application provide a communication resource determination method. The execution subject of this method is a terminal. In other words, this method can be executed by software or hardware installed on the terminal. The communication resource determination method may include the following steps.

[0207] Step 181: The terminal determines the second time domain position and / or the second frequency domain position of the first demodulation reference signal associated with the first physical downlink control channel according to the first time domain position and / or the first frequency domain position of the first physical downlink control channel; wherein, the first time domain position is the time domain position of the first physical downlink control channel or the time domain position of the first control resource set where the first physical downlink control channel is located; the first frequency domain position is the frequency domain position of the first physical downlink control channel or the frequency domain position of the first control resource set where the first physical downlink control channel is located.

[0208] The step 182 can implement the method embodiment of step 210 in Figure 2 and obtain the same or similar technical effects. The repeated part is not described here again.

[0209] Step 182: The terminal receives the first demodulation reference signal associated with the first physical downlink control channel according to the second time domain position and / or the second frequency domain position; wherein, the first physical downlink control channel is received based on the discrete Fourier transform - spread - orthogonal frequency division multiplexing waveform.

[0210] As can be seen from the technical solutions provided by the embodiments of the present invention above, the embodiments of the present invention determine the second time domain position and / or the second frequency domain position of the first demodulation reference signal associated with the first physical downlink control channel according to the first time domain position and / or the first frequency domain position corresponding to the first PDCCH; and obtain the first demodulation reference signal associated with the first physical downlink control channel of the network side device according to the second time domain position and / or the second frequency domain position, so that the terminal can accurately obtain the first DMRS based on the second time domain position and the second frequency domain position, and successfully perform channel estimation and demodulation on the first PDCCH, thereby improving the data transmission efficiency.

[0211] Based on the above embodiments, further, the second time domain position includes the position of the first symbol, where the first symbol is the symbol where the first demodulation reference signal is located; the position of the first symbol includes at least one of the following:

[0212] It is a specified symbol before or after the second symbol, where the second symbol is the symbol where the first physical downlink control channel is located;

[0213] It is a specified symbol before or after the third symbol, where the third symbol is the symbol where the first control resource set is located;

[0214] In the case where the second symbol is discontinuous, it is a specified symbol between the second symbols;

[0215] In the case where the third symbol is discontinuous, it is a specified symbol between the third symbols;

[0216] It is a specified symbol in the third symbol;

[0217] It is a specified symbol between the second symbol and the fourth symbol, where the fourth symbol is the symbol where the second physical downlink control channel is located;

[0218] It is a specified symbol between the third symbol and the fifth symbol, where the fifth symbol is the symbol where the second control resource set is located;

[0219] It is a specified symbol in the fifth symbol;

[0220] Wherein, the second physical downlink control channel is a physical downlink control channel paired with the first physical downlink control channel, and the second control resource set is a control resource set paired with the first control resource set.

[0221] Further, the position of the specified symbol is predefined by the protocol or configured by the network side.

[0222] Further, the specified symbol is N2 symbols starting from the N1th symbol, where N1 and N2 are predefined by the protocol or configured by the network side.

[0223] The embodiments of the present application can implement the method embodiments for determining the second time domain position as described above and achieve the same technical effects. The repeated parts will not be elaborated here.

[0224] As can be seen from the technical solutions provided by the embodiments of the present invention above, in the embodiments of the present invention, the terminal determines the position of the symbol where the first DMRS associated with the first PDCCH is located according to a variety of preset methods, so that the terminal can accurately obtain the first DMRS based on the second time domain position and successfully perform channel estimation and demodulation on the first PDCCH.

[0225] Based on the above embodiments, further, the second frequency domain position includes the index value of the first physical resource block, and the first physical resource block is the physical resource block where the first demodulation reference signal is located; the index value of the first physical resource block is determined by at least one of the following:

[0226] The index value of the resource block where the first physical downlink control channel is located;

[0227] The index value of the resource block where the first control resource set is located.

[0228] Further, the index value of the first physical resource block is the same as at least one of the following:

[0229] The index value of the resource block of the first physical downlink control channel;

[0230] The index value of the resource block of the first control resource set.

[0231] Further, the first demodulation reference signal is transmitted on all or part of the subcarriers where the first physical resource block is located.

[0232] Further, the second frequency domain position further includes the index value of the first subcarrier, and the first subcarrier is the subcarrier occupied by the first demodulation reference signal; the index value of the first subcarrier is determined by a first index and a second index; wherein, the first index is used to indicate the subcarrier spacing, and the second index is used to indicate the deviation value of the first subcarrier.

[0233] Further, the first index and the second index are predefined by the protocol or configured by the network side.

[0234] Further, the index value k of the first subcarrier is determined by the following formula:

[0235] k = N3 × n + N4, n = 0, 1,...

[0236] Wherein, N3 is the first index and N4 is the second index.

[0237] Furthermore, the index value of the first subcarrier or the second indicator is determined by at least one of the following:

[0238] The relative position relationship between the position of the first demodulation reference signal in the time domain and the position of the first symbol where the first physical downlink control channel is located;

[0239] The relative position relationship between the position of the first demodulation reference signal in the time domain and the position of the first symbol where the first control resource set is located;

[0240] The identifier of the first physical downlink control channel;

[0241] The minimum or maximum value of the index value of the control channel element occupied by the first physical downlink control channel;

[0242] The identifier of the search space corresponding to the first physical downlink control channel;

[0243] The identifier of the first control resource set.

[0244] The embodiments of the present application can implement the method embodiments for determining the second frequency domain position as described below, and obtain the same technical effects. The repeated parts will not be elaborated here.

[0245] It can be seen from the technical solutions provided by the embodiments of the present invention above that the embodiments of the present invention enable the terminal to accurately obtain the first DMRS based on the second frequency domain position, and successfully perform channel estimation and demodulation on the first PDCCH by determining the second frequency domain position of the first DMRS associated with the first PDCCH.

[0246] Based on the above embodiments, further, the second time domain position is at least one of the following:

[0247] The same as the time domain position of the second demodulation reference signal of the second physical downlink control channel;

[0248] The same as the time domain position of the third demodulation reference signal of the second control resource set;

[0249] Wherein, the second physical downlink control channel is the physical downlink control channel paired with the first physical downlink control channel, and the second control resource set is the control resource set paired with the first control resource set.

[0250] Further, the second frequency domain position is at least one of the following:

[0251] Different from the frequency domain position of the second demodulation reference signal of the second physical downlink control channel;

[0252] Different from the frequency domain position of the third demodulation reference signal of the second control resource set;

[0253] Wherein, the second physical downlink control channel is a physical downlink control channel paired with the first physical downlink control channel, and the second control resource set is a control resource set paired with the first control resource set.

[0254] The embodiments of the present application can implement the same method embodiments of the network-side device and achieve the same technical effects. The repeated parts will not be elaborated here.

[0255] As can be seen from the technical solutions provided by the embodiments of the present invention above, by setting the time domain position of the first DMRS to be the same as the time domain position of the second DMRS or the time domain position of the third DMRS, and setting the frequency domain position of the first DMRS to be different from the frequency domain position of the second DMRS or the frequency domain position of the third DMRS, the DMRSs of multiple PDCCHs occupy the same symbols in the time domain, reducing the overhead of transmitting DMRS and saving communication resources.

[0256] For the communication resource determination method provided by the embodiments of the present application, the execution subject can be a communication resource determination device. In the embodiments of the present application, taking the communication resource determination device executing the communication resource determination method as an example, the communication resource determination device provided by the embodiments of the present application is described.

[0257] As Figure 19 shown, the communication resource determination device includes: a determination module 191 and a reception module 192. Wherein, the determination module 191 is configured to determine the second time domain position and / or the second frequency domain position of the first demodulation reference signal associated with the first physical downlink control channel according to the first time domain position and / or the first frequency domain position corresponding to the first physical downlink control channel; the reception module 192 is configured to receive the first demodulation reference signal associated with the first physical downlink control channel according to the second time domain position and / or the second frequency domain position; wherein, the first physical downlink control channel is received based on a discrete Fourier transform-spread-orthogonal frequency division multiplexing waveform; wherein, the first time domain position is the time domain position of the first physical downlink control channel or the time domain position of the first control resource set where the first physical downlink control channel is located; the first frequency domain position is the frequency domain position of the first physical downlink control channel or the frequency domain position of the first control resource set where the first physical downlink control channel is located.

[0258] As can be seen from the technical solutions provided by the embodiments of the present invention above, the embodiments of the present invention determine the second time domain position and / or the second frequency domain position of the first demodulation reference signal associated with the first physical downlink control channel according to the first time domain position and / or the first frequency domain position corresponding to the first PDCCH; and send the first demodulation reference signal associated with the first physical downlink control channel to the terminal according to the second time domain position and / or the second frequency domain position, so that the first DMRS can be accurately obtained based on the second time domain position and the second frequency domain position, and the channel estimation and demodulation of the first PDCCH can be successfully performed to improve the data transmission efficiency.

[0259] Based on the above embodiments, further, the second time domain position includes the position of the first symbol, and the first symbol is the symbol where the first demodulation reference signal is located; the position of the first symbol includes at least one of the following:

[0260] a specified symbol before or after the second symbol, where the second symbol is the symbol where the first physical downlink control channel is located;

[0261] a specified symbol before or after the third symbol, where the third symbol is the symbol where the first control resource set is located;

[0262] in the case where the second symbol is discontinuous, a specified symbol between the second symbols;

[0263] in the case where the third symbol is discontinuous, a specified symbol between the third symbols;

[0264] a specified symbol in the third symbol;

[0265] a specified symbol between the second symbol and the fourth symbol, where the fourth symbol is the symbol where the second physical downlink control channel is located;

[0266] a specified symbol between the third symbol and the fifth symbol, where the fifth symbol is the symbol where the second control resource set is located;

[0267] a specified symbol in the fifth symbol;

[0268] Wherein, the second physical downlink control channel is a physical downlink control channel paired with the first physical downlink control channel, and the second control resource set is a control resource set paired with the first control resource set.

[0269] Further, the position of the specified symbol is predefined by the protocol or configured by the network side.

[0270] Further, the specified symbol is N2 symbols starting from the N1th symbol, and N1 and N2 are predefined by the protocol or configured by the network side.

[0271] As can be seen from the technical solutions provided by the embodiments of the present invention above, the embodiments of the present invention determine the position of the symbol where the first DMRS associated with the first PDCCH is located according to a variety of preset manners, so that the first DMRS can be accurately obtained based on the second time domain position, and the first PDCCH can be successfully subjected to channel estimation and demodulation.

[0272] Based on the above embodiments, further, the second frequency domain position includes the index value of the first physical resource block, and the first physical resource block is the physical resource block where the first demodulation reference signal is located; the index value of the first physical resource block is determined by at least one of the following:

[0273] The index value of the resource block where the first physical downlink control channel is located;

[0274] The index value of the resource block where the first control resource set is located.

[0275] Further, the index value of the first physical resource block is the same as at least one of the following:

[0276] The index value of the resource block of the first physical downlink control channel;

[0277] The index value of the resource block of the first control resource set.

[0278] Further, the first demodulation reference signal is transmitted on all or part of the subcarriers where the first physical resource block is located.

[0279] Further, the second frequency domain position further includes the index value of the first subcarrier, and the first subcarrier is the subcarrier occupied by the first demodulation reference signal; the index value of the first subcarrier is determined by a first index and a second index; wherein, the first index is used to indicate the subcarrier spacing, and the second index is used to indicate the deviation value of the first subcarrier.

[0280] Further, the first index and the second index are predefined by the protocol or configured by the network side.

[0281] Further, the index value k of the first subcarrier is determined by the following formula:

[0282] k = N3 × n + N4, n = 0, 1, …

[0283] Wherein, N3 is the first index and N4 is the second index.

[0284] Further, the index value of the first subcarrier or the second index is determined by at least one of the following:

[0285] The relative position relationship between the position of the first demodulation reference signal in the time domain and the position of the first symbol where the first physical downlink control channel is located;

[0286] The relative position relationship between the position of the first demodulation reference signal in the time domain and the position of the first symbol where the first control resource set is located;

[0287] The identifier of the first physical downlink control channel;

[0288] The minimum or maximum value of the index value of the control channel element occupied by the first physical downlink control channel;

[0289] The identifier of the search space corresponding to the first physical downlink control channel;

[0290] The identifier of the first control resource set.

[0291] As can be seen from the technical solutions provided by the embodiments of the present invention above, in the embodiments of the present invention, by determining the second frequency domain position of the first DMRS associated with the first PDCCH, the terminal can accurately obtain the first DMRS based on the second frequency domain position and successfully perform channel estimation and demodulation on the first PDCCH.

[0292] Based on the above embodiments, further, the second time domain position is at least one of the following:

[0293] The same as the time domain position of the second demodulation reference signal of the second physical downlink control channel;

[0294] The same as the time domain position of the third demodulation reference signal of the second control resource set;

[0295] Wherein, the second physical downlink control channel is a physical downlink control channel paired with the first physical downlink control channel, and the second control resource set is a control resource set paired with the first control resource set.

[0296] Further, the second frequency domain position is at least one of the following:

[0297] Different from the frequency domain position of the second demodulation reference signal of the second physical downlink control channel;

[0298] Different from the frequency domain position of the third demodulation reference signal of the second control resource set;

[0299] Wherein, the second physical downlink control channel is a physical downlink control channel paired with the first physical downlink control channel, and the second control resource set is a control resource set paired with the first control resource set.

[0300] As can be seen from the technical solutions provided by the embodiments of the present invention above, in the embodiments of the present invention, by setting the time domain position of the first DMRS to be the same as that of the second DMRS or the same as that of the third DMRS, and setting the frequency domain position of the first DMRS to be different from that of the second DMRS or different from that of the third DMRS, so that the DMRSs of multiple PDCCHs occupy the same symbol in the time domain, reducing the overhead of transmitting DMRSs and saving communication resources.

[0301] The communication resource determination device in the embodiments of the present application may be an electronic device, such as an electronic device with an operating system, or a component in an electronic device, such as an integrated circuit or a chip. The electronic device may be a terminal or other devices other than terminals. Exemplarily, the terminal may include, but is not limited to, the types of the above-mentioned terminal 11, and other devices may be servers, network attached storage (NAS), etc., which are not specifically limited in the embodiments of the present application.

[0302] The communication resource determination device provided by the embodiments of the present application can implement Figure 18 each process implemented by the method embodiments and achieve the same technical effects. To avoid repetition, details are not described here again.

[0303] Optionally, as Figure 20 shown, the embodiments of the present application further provide a communication device 2000, including a processor 2001 and a memory 2002. A program or instruction that can run on the processor 2001 is stored on the memory 2002. For example, when the communication device 2000 is a terminal, when the program or instruction is executed by the processor 2001, each step of the above-mentioned communication resource determination method embodiment is implemented, and the same technical effects can be achieved. When the communication device 2000 is a network-side device, when the program or instruction is executed by the processor 1701, each step of the above-mentioned communication resource determination method embodiment is implemented, and the same technical effects can be achieved. To avoid repetition, details are not described here again.

[0304] An embodiment of the present application further provides a network-side device, including a processor and a communication interface. The processor is configured to determine a second time-domain position and / or a second frequency-domain position of a first demodulation reference signal associated with the first physical downlink control channel according to a first time-domain position and / or a first frequency-domain position corresponding to the first physical downlink control channel. The communication interface is configured to send the first demodulation reference signal associated with the first physical downlink control channel to a terminal according to the second time-domain position and / or the second frequency-domain position. Wherein, the first physical downlink control channel is transmitted based on a discrete Fourier transform - spread - orthogonal frequency division multiplexing waveform. This embodiment of the network-side device corresponds to the above-mentioned method embodiment of the network-side device. Each implementation process and implementation manner of the above method embodiment can be applied to this embodiment of the network-side device, and the same technical effect can be achieved.

[0305] Specifically, an embodiment of the present application further provides a network-side device. As Figure 21 shown, the network-side device 2100 includes: an antenna 211, a radio frequency device 212, a baseband device 213, a processor 214, and a memory 215. The antenna 211 is connected to the radio frequency device 212. In the uplink direction, the radio frequency device 212 receives information through the antenna 211 and sends the received information to the baseband device 213 for processing. In the downlink direction, the baseband device 213 processes the information to be sent and sends it to the radio frequency device 212. After processing the received information, the radio frequency device 212 sends it out through the antenna 211.

[0306] The method executed by the network-side device in the above embodiments can be implemented in the baseband device 213, and the baseband device 213 includes a baseband processor.

[0307] The baseband device 213 may include, for example, at least one baseband board, and a plurality of chips are provided on the baseband board. As Figure 21 shown, one of the chips is, for example, a baseband processor, which is connected to the memory 215 through a bus interface to call a program in the memory 215 to execute the operations of the network device shown in the above method embodiments.

[0308] The network-side device may further include a network interface 216, and this interface is, for example, a common public radio interface (CPRI).

[0309] Specifically, the network-side device 2100 in an embodiment of the present invention further includes: instructions or programs stored on the memory 215 and executable on the processor 214. The processor 214 calls the instructions or programs in the memory 215 to execute Figure 17 the methods executed by the respective modules shown, and achieves the same technical effect. To avoid repetition, it will not be elaborated here.

[0310] An embodiment of this application also provides a terminal, including a processor and a communication interface. The processor is configured to determine a second time domain position and / or a second frequency domain position of a first demodulation reference signal associated with the first physical downlink control channel according to a first time domain position and / or a first frequency domain position corresponding to the first physical downlink control channel. The communication interface is configured to obtain the first demodulation reference signal associated with the first physical downlink control channel of the network side device according to the second time domain position and / or the second frequency domain position. This terminal embodiment corresponds to the above-mentioned terminal-side method embodiment. Each implementation process and implementation manner of the above method embodiment can be applied to this terminal embodiment and can achieve the same technical effect. Specifically, Figure 22 FIG. is a schematic diagram of the hardware structure of a terminal for implementing an embodiment of this application.

[0311] The terminal 2200 includes, but is not limited to, at least some components such as a radio frequency unit 2201, a network module 2202, an audio output unit 2203, an input unit 2204, a sensor 2205, a display unit 2206, a user input unit 2207, an interface unit 2208, a memory 2209, and a processor 2210.

[0312] Those skilled in the art can understand that the terminal 2200 may further include a power supply (such as a battery) for supplying power to each component. The power supply may be logically connected to the processor 2210 through a power management system, so as to implement functions such as management of charging, discharging, and power consumption management through the power management system. Figure 22 The terminal structure shown in does not constitute a limitation on the terminal. The terminal may include more or fewer components than shown in the figure, or combine certain components, or have different component arrangements, which will not be elaborated here.

[0313] It should be understood that in the embodiment of this application, the input unit 2204 may include a graphics processing unit (GPU) 22041 and a microphone 22042. The graphics processor 22041 processes image data of a static picture or video obtained by an image capture device (such as a camera) in a video capture mode or an image capture mode. The display unit 2206 may include a display panel 22061, and the display panel 22061 may be configured in the form of a liquid crystal display, an organic light emitting diode, etc. The user input unit 2207 includes at least one of a touch panel 22071 and other input devices 22072. The touch panel 22071 is also called a touch screen. The touch panel 22071 may include two parts: a touch detection device and a touch controller. The other input devices 22072 may include, but are not limited to, a physical keyboard, function keys (such as volume control keys, switch keys, etc.), a trackball, a mouse, and a joystick, which will not be elaborated here.

[0314] In an embodiment of the present application, after receiving downlink data from a network-side device, the radio frequency unit 2201 can transmit it to the processor 2210 for processing; in addition, the radio frequency unit 2201 can send uplink data to the network-side device. Generally, the radio frequency unit 2201 includes, but is not limited to, an antenna, an amplifier, a transceiver, a coupler, a low-noise amplifier, a duplexer, etc.

[0315] The memory 2209 can be used to store software programs or instructions and various data. The memory 2209 mainly includes a first storage area for storing programs or instructions and a second storage area for storing data. Among them, the first storage area can store an operating system, applications or instructions required for at least one function (such as a sound playback function, an image playback function, etc.). In addition, the memory 2209 can include a volatile memory or a non-volatile memory, or the memory 2209 can include both a volatile memory and a non-volatile memory. Among them, the non-volatile memory can be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory can be a random access memory (RAM), a static random access memory (SRAM), a dynamic random access memory (DRAM), a synchronous dynamic random access memory (SDRAM), a double data rate synchronous dynamic random access memory (DDR SDRAM), an enhanced synchronous dynamic random access memory (ESDRAM), a synchlink dynamic random access memory (SLDRAM), and a direct rambus random access memory (DRRAM). The memory 2209 in the embodiment of the present application includes, but is not limited to, these and any other suitable types of memories.

[0316] The processor 2210 can include one or more processing units; optionally, the processor 2210 integrates an application processor and a modulation and demodulation processor. Among them, the application processor mainly processes operations related to the operating system, user interface, and applications, etc., and the modulation and demodulation processor mainly processes wireless communication signals, such as a baseband processor. It can be understood that the above modulation and demodulation processor may not be integrated into the processor 2210.

[0317] Among them, the radio frequency unit 2201 is configured to obtain the first demodulation reference signal associated with the first physical downlink control channel of the network side device according to the second time domain position and / or the second frequency domain position; wherein, the first physical downlink control channel is received based on the discrete Fourier transform - spread - orthogonal frequency division multiplexing waveform.

[0318] The processor 2210 is configured to determine the second time domain position and / or the second frequency domain position of the first demodulation reference signal associated with the first physical downlink control channel according to the first time domain position and / or the first frequency domain position corresponding to the first physical downlink control channel; wherein, the first time domain position is the time domain position of the first physical downlink control channel or the time domain position of the first control resource set where the first physical downlink control channel is located; the first frequency domain position is the frequency domain position of the first physical downlink control channel or the frequency domain position of the first control resource set where the first physical downlink control channel is located.

[0319] Through the embodiments of the present application, the terminal can accurately obtain the first DMRS based on the second time domain position and the second frequency domain position, and successfully perform channel estimation and demodulation on the first PDCCH, so as to improve the data transmission efficiency.

[0320] Based on the above embodiments, further, the second time domain position includes the position of the first symbol, and the first symbol is the symbol where the first demodulation reference signal is located; the position of the first symbol includes at least one of the following:

[0321] A specified symbol before or after the second symbol, where the second symbol is the symbol where the first physical downlink control channel is located;

[0322] A specified symbol before or after the third symbol, where the third symbol is the symbol where the first control resource set is located;

[0323] In the case where the second symbol is discontinuous, it is a specified symbol between the second symbols;

[0324] In the case where the third symbol is discontinuous, it is a specified symbol between the third symbols;

[0325] It is a specified symbol in the third symbol;

[0326] It is a specified symbol between the second symbol and the fourth symbol, where the fourth symbol is the symbol where the second physical downlink control channel is located;

[0327] It is a specified symbol between the third symbol and the fifth symbol, where the fifth symbol is the symbol where the second control resource set is located;

[0328] It is a specified symbol in the fifth symbol;

[0329] Wherein, the second physical downlink control channel is a physical downlink control channel paired with the first physical downlink control channel, and the second control resource set is a control resource set paired with the first control resource set.

[0330] Further, the position of the specified symbol is predefined by the protocol or configured by the network side.

[0331] Further, the specified symbol is N2 symbols starting from the N1-th symbol, and the N1 and N2 are predefined by the protocol or configured by the network side.

[0332] Through the embodiments of the present application, the terminal can accurately obtain the first DMRS based on the second time domain position and successfully perform channel estimation and demodulation on the first PDCCH.

[0333] Based on the above embodiments, further, the second frequency domain position includes the index value of the first physical resource block, and the first physical resource block is the physical resource block where the first demodulation reference signal is located; the index value of the first physical resource block is determined by at least one of the following:

[0334] The index value of the resource block where the first physical downlink control channel is located;

[0335] The index value of the resource block where the first control resource set is located.

[0336] Further, the index value of the first physical resource block is the same as at least one of the following:

[0337] The index value of the resource block of the first physical downlink control channel;

[0338] The index value of the resource block of the first control resource set.

[0339] Further, the first demodulation reference signal is transmitted on all or part of the subcarriers in the first physical resource block.

[0340] Further, the second frequency domain position further includes the index value of the first subcarrier, and the first subcarrier is the subcarrier occupied by the first demodulation reference signal; the index value of the first subcarrier is determined by a first index and a second index; wherein, the first index is used to indicate the subcarrier spacing, and the second index is used to indicate the deviation value of the first subcarrier.

[0341] Further, the first index and the second index are predefined by the protocol or configured by the network side.

[0342] Further, the index value k of the first subcarrier is determined by the following formula:

[0343] k = N3 × n + N4, n = 0, 1, …

[0344] Wherein, N3 is the first index and N4 is the second index.

[0345] Furthermore, the index value of the first subcarrier or the second index is determined by at least one of the following:

[0346] The relative position relationship between the position of the first demodulation reference signal in the time domain and the position of the first symbol where the first physical downlink control channel is located;

[0347] The relative position relationship between the position of the first demodulation reference signal in the time domain and the position of the first symbol where the first control resource set is located;

[0348] The identifier of the first physical downlink control channel;

[0349] The minimum or maximum value of the index value of the control channel element occupied by the first physical downlink control channel;

[0350] The identifier of the search space corresponding to the first physical downlink control channel;

[0351] The identifier of the first control resource set.

[0352] Through the embodiments of the present application, the terminal can accurately obtain the first DMRS based on the second frequency domain position and successfully perform channel estimation and demodulation on the first PDCCH.

[0353] Based on the above embodiments, furthermore, the second time domain position is at least one of the following:

[0354] The same as the time domain position of the second demodulation reference signal of the second physical downlink control channel;

[0355] The same as the time domain position of the third demodulation reference signal of the second control resource set;

[0356] Wherein, the second physical downlink control channel is the physical downlink control channel paired with the first physical downlink control channel, and the second control resource set is the control resource set paired with the first control resource set.

[0357] Furthermore, the second frequency domain position is at least one of the following:

[0358] Different from the frequency domain position of the second demodulation reference signal of the second physical downlink control channel;

[0359] Different from the frequency domain position of the third demodulation reference signal of the second control resource set;

[0360] Wherein, the second physical downlink control channel is a physical downlink control channel paired with the first physical downlink control channel, and the second control resource set is a control resource set paired with the first control resource set.

[0361] By the embodiments of the present application, the DMRSs of multiple PDCCHs occupy the same symbols in the time domain, reducing the overhead of transmitting DMRSs and saving communication resources.

[0362] The embodiments of the present application further provide a readable storage medium, on which a program or instruction is stored. When the program or instruction is executed by a processor, each process of the above-mentioned communication resource determination method embodiment is implemented, and the same technical effect can be achieved. To avoid repetition, it will not be elaborated here.

[0363] Wherein, the processor is the processor in the terminal described in the above embodiments. The readable storage medium includes computer-readable storage media, such as computer read-only memory ROM, random access memory RAM, magnetic disk or optical disc, etc.

[0364] The embodiments of the present application further provide a chip, which includes a processor and a communication interface. The communication interface is coupled to the processor, and the processor is used to run a program or instruction to implement each process of the above-mentioned communication resource determination method embodiment, and the same technical effect can be achieved. To avoid repetition, it will not be elaborated here.

[0365] It should be understood that the chip mentioned in the embodiments of the present application can also be referred to as a system-on-chip, system chip, chip system or system-on-chip, etc.

[0366] The embodiments of the present application further provide a computer program / program product, which is stored in a storage medium. The computer program / program product is executed by at least one processor to implement each process of the above-mentioned communication resource determination method embodiment, and the same technical effect can be achieved. To avoid repetition, it will not be elaborated here.

[0367] The embodiments of the present application further provide a communication resource determination system, including: a terminal and a network-side device. The terminal can be used to execute the steps of the above-mentioned communication resource determination method, and the network-side device can be used to execute the steps of the above-mentioned communication resource determination method.

[0368] It should be noted that in this article, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or further includes elements inherent to such a process, method, article or device. Without further limitations, an element defined by the statement "including one..." does not exclude the existence of additional identical elements in the process, method, article or device including such element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in the reverse order according to the functions involved. For example, the described methods may be performed in an order different from that described, and various steps may be added, omitted, or combined. Additionally, the features described with reference to certain examples may be combined in other examples.

[0369] Through the description of the above embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus a necessary general hardware platform. Of course, it can also be implemented by hardware, but in many cases, the former is a better implementation. Based on such an understanding, the technical solution of the present application, in essence, or the part that contributes to the prior art, can be embodied in the form of a computer software product. The computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disc) and includes several instructions for causing a terminal (which may be a mobile phone, computer, server, air conditioner, or network device, etc.) to execute the methods described in various embodiments of the present application.

[0370] The embodiments of the present application have been described above in conjunction with the accompanying drawings. However, the present application is not limited to the above specific embodiments. The above specific embodiments are merely illustrative and not restrictive. Under the inspiration of the present application, those of ordinary skill in the art can also make many forms without departing from the purpose of the present application and the scope protected by the claims, and all of them fall within the protection scope of the present application.

Claims

1. A communication resource determination method, characterized in that, including: The network - side device determines the second time - domain position and / or the second frequency - domain position of a first demodulation reference signal associated with the first physical downlink control channel according to the first time - domain position and / or the first frequency - domain position corresponding to the first physical downlink control channel; The network - side device sends the first demodulation reference signal associated with the first physical downlink control channel according to the second time - domain position and / or the second frequency - domain position; wherein, the first physical downlink control channel is sent based on a discrete Fourier transform - spread - orthogonal frequency - division multiplexing waveform; wherein, the first time - domain position is the time - domain position of the first physical downlink control channel or the time - domain position of the first control resource set where the first physical downlink control channel is located; the first frequency - domain position is the frequency - domain position of the first physical downlink control channel or the frequency - domain position of the first control resource set where the first physical downlink control channel is located; The second time - domain position includes the position of a first symbol, and the first symbol is the symbol where the first demodulation reference signal is located; the position of the first symbol includes at least one of the following: is a specified symbol before or after a second symbol, and the second symbol is the symbol where the first physical downlink control channel is located; is a specified symbol before or after a third symbol, and the third symbol is the symbol where the first control resource set is located; in the case where the second symbol is discontinuous, is a specified symbol between the second symbols; in the case where the third symbol is discontinuous, is a specified symbol between the third symbols; is a specified symbol in the third symbol; is a specified symbol between the second symbol and a fourth symbol, and the fourth symbol is the symbol where a second physical downlink control channel is located; is a specified symbol between the third symbol and a fifth symbol, and the fifth symbol is the symbol where a second control resource set is located; is a specified symbol in the fifth symbol; The second frequency - domain position includes the index value of a first physical resource block, and the first physical resource block is the physical resource block where the first demodulation reference signal is located; the index value of the first physical resource block is determined by at least one of the following: the index value of the resource block where the first physical downlink control channel is located; the index value of the resource block where the first control resource set is located; wherein, the second physical downlink control channel is a physical downlink control channel paired with the first physical downlink control channel, and the second control resource set is a control resource set paired with the first control resource set.

2. The method according to claim 1, characterized in that, The position of the specified symbol is predefined by the protocol or configured by the network - side.

3. The method according to claim 2, wherein The specified symbol is N2 symbols starting from the N1 - th symbol, and N1 and N2 are predefined by the protocol or configured by the network - side.

4. The method according to claim 1, wherein The index value of the first physical resource block is the same as at least one of the following: the index value of the resource block of the first physical downlink control channel; the index value of the resource block of the first control resource set.

5. The method according to claim 1 or 4, characterized in that The first demodulation reference signal is transmitted on all or part of the sub - carriers in the first physical resource block.

6. The method according to claim 5, characterized in that The second frequency-domain position further includes the index value of a first subcarrier, where the first subcarrier is the subcarrier occupied by the first demodulation reference signal; the index value of the first subcarrier is determined by a first index and a second index; wherein, the first index is used to indicate the subcarrier spacing, and the second index is used to indicate the deviation value of the first subcarrier.

7. The method according to claim 6, characterized in that, The first index and the second index are predefined by a protocol or configured by the network side.

8. The method according to claim 6, characterized in that The index value k of the first subcarrier is determined by the following formula: where N3 is the first index and N4 is the second index.

9. The method according to any one of claims 6 - 8, characterized in that The index value of the first subcarrier or the second index is determined by at least one of the following: The relative position relationship between the position of the first demodulation reference signal in the time domain and the position of the first symbol where the first physical downlink control channel is located; The relative position relationship between the position of the first demodulation reference signal in the time domain and the position of the first symbol where the first control resource set is located; The identifier of the first physical downlink control channel; The minimum or maximum value of the index value of the control channel element occupied by the first physical downlink control channel; The identifier of the search space corresponding to the first physical downlink control channel; The identifier of the first control resource set.

10. The method according to claim 1, wherein The second time-domain position is at least one of the following: The same as the time-domain position of the second demodulation reference signal of the second physical downlink control channel; The same as the time-domain position of the third demodulation reference signal of the second control resource set; wherein, the second physical downlink control channel is the physical downlink control channel paired with the first physical downlink control channel, and the second control resource set is the control resource set paired with the first control resource set.

11. The method according to claim 1, characterized in that, The second frequency-domain position is at least one of the following: Different from the frequency-domain position of the second demodulation reference signal of the second physical downlink control channel; Different from the frequency-domain position of the third demodulation reference signal of the second control resource set; wherein, the second physical downlink control channel is the physical downlink control channel paired with the first physical downlink control channel, and the second control resource set is the control resource set paired with the first control resource set.

12. A communication resource determination device, characterized in that, Including: A determination module, configured to determine the second time-domain position and / or the second frequency-domain position of the first demodulation reference signal associated with the first physical downlink control channel according to the first time-domain position and / or the first frequency-domain position corresponding to the first physical downlink control channel; A sending module, configured to send the first demodulation reference signal associated with the first physical downlink control channel according to the second time-domain position and / or the second frequency-domain position; wherein, the first physical downlink control channel is sent based on a discrete Fourier transform - spread - orthogonal frequency division multiplexing waveform; wherein, the first time-domain position is the time-domain position of the first physical downlink control channel or the time-domain position of the first control resource set where the first physical downlink control channel is located; the first frequency-domain position is the frequency-domain position of the first physical downlink control channel or the frequency-domain position of the first control resource set where the first physical downlink control channel is located; The second time domain position includes the position of a first symbol, where the first symbol is the symbol in which the first demodulation reference signal is located; the position of the first symbol includes at least one of the following: a specified symbol before or after a second symbol, where the second symbol is the symbol in which the first physical downlink control channel is located; a specified symbol before or after a third symbol, where the third symbol is the symbol in which the first control resource set is located; when the second symbol is discontinuous, a specified symbol between the second symbols; when the third symbol is discontinuous, a specified symbol between the third symbols; a specified symbol in the third symbol; a specified symbol between the second symbol and a fourth symbol, where the fourth symbol is the symbol in which a second physical downlink control channel is located; a specified symbol between the third symbol and a fifth symbol, where the fifth symbol is the symbol in which a second control resource set is located; a specified symbol in the fifth symbol; The second frequency domain position includes the index value of a first physical resource block, where the first physical resource block is the physical resource block in which the first demodulation reference signal is located; the index value of the first physical resource block is determined by at least one of the following: the index value of the resource block in which the first physical downlink control channel is located; the index value of the resource block in which the first control resource set is located; wherein, the second physical downlink control channel is a physical downlink control channel paired with the first physical downlink control channel, and the second control resource set is a control resource set paired with the first control resource set.

13. A method for determining communication resources, characterized in that, including: The terminal determines the second time domain position and / or the second frequency domain position of a first demodulation reference signal associated with the first physical downlink control channel according to the first time domain position and / or the first frequency domain position corresponding to the first physical downlink control channel; The terminal receives the first demodulation reference signal associated with the first physical downlink control channel according to the second time domain position and / or the second frequency domain position; wherein, the first physical downlink control channel is received based on a discrete Fourier transform - spread - orthogonal frequency division multiplexing waveform; wherein, the first time domain position is the time domain position of the first physical downlink control channel or the time domain position of the first control resource set in which the first physical downlink control channel is located; the first frequency domain position is the frequency domain position of the first physical downlink control channel or the frequency domain position of the first control resource set in which the first physical downlink control channel is located; The second time domain position includes the position of a first symbol, where the first symbol is the symbol in which the first demodulation reference signal is located; the position of the first symbol includes at least one of the following: a specified symbol before or after a second symbol, where the second symbol is the symbol in which the first physical downlink control channel is located; a specified symbol before or after a third symbol, where the third symbol is the symbol in which the first control resource set is located; when the second symbol is discontinuous, a specified symbol between the second symbols; when the third symbol is discontinuous, a specified symbol between the third symbols; a specified symbol in the third symbol; is the designated symbol between the second symbol and the fourth symbol, where the fourth symbol is the symbol where the second physical downlink control channel is located; is the designated symbol between the third symbol and the fifth symbol, where the fifth symbol is the symbol where the second control resource set is located; is the designated symbol in the fifth symbol; The second frequency-domain position includes the index value of the first physical resource block, where the first physical resource block is the physical resource block where the first demodulation reference signal is located; the index value of the first physical resource block is determined by at least one of the following: The index value of the resource block where the first physical downlink control channel is located; The index value of the resource block where the first control resource set is located; Wherein, the second physical downlink control channel is the physical downlink control channel paired with the first physical downlink control channel, and the second control resource set is the control resource set paired with the first control resource set.

14. The method according to claim 13, wherein The position of the designated symbol is predefined by the protocol or configured by the network side.

15. The method according to claim 14, characterized in that, The designated symbol is N2 symbols starting from the N1th symbol, where N1 and N2 are predefined by the protocol or configured by the network side.

16. The method according to claim 14, characterized in that The index value of the first physical resource block is the same as at least one of the following: The index value of the resource block of the first physical downlink control channel; The index value of the resource block of the first control resource set.

17. The method according to claim 13 or 16, characterized in that, The first demodulation reference signal is transmitted on all or part of the subcarriers in the first physical resource block.

18. The method according to claim 17, wherein The second frequency-domain position further includes the index value of the first subcarrier, where the first subcarrier is the subcarrier occupied by the first demodulation reference signal; the index value of the first subcarrier is determined by a first index and a second index; wherein, the first index is used to indicate the subcarrier spacing, and the second index is used to indicate the deviation value of the first subcarrier.

19. The method according to claim 18, characterized in that, The first index and the second index are predefined by the protocol or configured by the network side.

20. The method according to claim 18, wherein The index value k of the first subcarrier is determined by the following formula: Where N3 is the first index and N4 is the second index.

21. The method according to any one of claims 18 - 20, characterized in that, The index value of the first subcarrier or the second index is determined by at least one of the following: The relative position relationship between the position of the first demodulation reference signal in the time domain and the position of the first symbol where the first physical downlink control channel is located; The relative position relationship between the position of the first demodulation reference signal in the time domain and the position of the first symbol where the first control resource set is located; The identifier of the first physical downlink control channel; The minimum or maximum value of the index value of the control channel unit occupied by the first physical downlink control channel; The identifier of the search space corresponding to the first physical downlink control channel; The identifier of the first control resource set.

22. The method according to claim 13, wherein The second time-domain position is at least one of the following: The same as the time-domain position of the second demodulation reference signal of the second physical downlink control channel; The same as the time-domain position of the third demodulation reference signal of the second control resource set; Wherein, the second physical downlink control channel is the physical downlink control channel paired with the first physical downlink control channel, and the second control resource set is the control resource set paired with the first control resource set.

23. The method according to claim 13, characterized in that, The second frequency-domain position is at least one of the following: is different from the frequency-domain position of the second demodulation reference signal of the second physical downlink control channel; is different from the frequency-domain position of the third demodulation reference signal of the second control resource set; wherein, the second physical downlink control channel is a physical downlink control channel paired with the first physical downlink control channel, and the second control resource set is a control resource set paired with the first control resource set.

24. A communication resource determination device, characterized in that, comprises: a determination module, configured to determine a second time-domain position and / or a second frequency-domain position of a first demodulation reference signal associated with the first physical downlink control channel according to a first time-domain position and / or a first frequency-domain position corresponding to the first physical downlink control channel; a receiving module, configured to receive the first demodulation reference signal associated with the first physical downlink control channel according to the second time-domain position and / or the second frequency-domain position; wherein, the first physical downlink control channel is received based on a discrete Fourier transform - spread - orthogonal frequency division multiplexing waveform; wherein, the first time-domain position is the time-domain position of the first physical downlink control channel or the time-domain position of the first control resource set where the first physical downlink control channel is located; the first frequency-domain position is the frequency-domain position of the first physical downlink control channel or the frequency-domain position of the first control resource set where the first physical downlink control channel is located; the second time-domain position includes the position of a first symbol, and the first symbol is the symbol where the first demodulation reference signal is located; the position of the first symbol includes at least one of the following: is a specified symbol before or after a second symbol, and the second symbol is the symbol where the first physical downlink control channel is located; is a specified symbol before or after a third symbol, and the third symbol is the symbol where the first control resource set is located; when the second symbol is discontinuous, is a specified symbol between the second symbols; when the third symbol is discontinuous, is a specified symbol between the third symbols; is a specified symbol in the third symbol; is a specified symbol between the second symbol and a fourth symbol, and the fourth symbol is the symbol where the second physical downlink control channel is located; is a specified symbol between the third symbol and a fifth symbol, and the fifth symbol is the symbol where the second control resource set is located; is a specified symbol in the fifth symbol; the second frequency-domain position includes an index value of a first physical resource block, and the first physical resource block is the physical resource block where the first demodulation reference signal is located; the index value of the first physical resource block is determined by at least one of the following: the index value of the resource block where the first physical downlink control channel is located; the index value of the resource block where the first control resource set is located; wherein, the second physical downlink control channel is a physical downlink control channel paired with the first physical downlink control channel, and the second control resource set is a control resource set paired with the first control resource set.

25. A network-side device, characterized in that, comprises a processor and a memory, the memory stores a program or instruction that can run on the processor, and when the program or instruction is executed by the processor, the steps of the communication resource determination method according to any one of claims 1 to 11 are implemented.

26. A terminal, characterized in that, It includes a processor and a memory. The memory stores programs or instructions that can run on the processor. When the programs or instructions are executed by the processor, the steps of the communication resource determination method described in any one of claims 13 to 23 are implemented.

27. A readable storage medium, characterized in that, Programs or instructions are stored on the readable storage medium. When the programs or instructions are executed by a processor, the communication resource determination method described in any one of claims 1-11 is implemented, or the steps of the communication resource determination method described in any one of claims 13 to 23 are implemented.

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