A method for enhancing physical downlink control channel, a communication device and a system

Abstract

The present application provides a method for enhancing a physical downlink control channel, a communication device, and a system. In this method, a terminal device obtains control resource set configuration information, which is used to configure the time-domain resources and frequency-domain resources of a control resource set. The time-domain resources include X time-domain symbols, and the X time-domain symbols are continuous in the time domain. X is an integer greater than or equal to 1 and less than or equal to M, and M is an integer greater than or equal to 4. Furthermore, the terminal device can determine a physical downlink shared channel time-domain resource configuration set according to the X time-domain symbols included in the control resource set. By using the present application, more control channel units can be provided by increasing the number of time-domain symbols of the control resource set, enhancing the transmission performance of the physical downlink control channel. Moreover, the terminal device determines the time-domain resource configuration information of the physical downlink shared channel according to the number of time-domain symbols of the control resource set, thereby ensuring the flexibility of the time-domain resource allocation of the physical downlink shared channel.

Description

Technical Field

[0001] This application relates to the field of communication technologies, and particularly to a method for enhancing a physical downlink control channel, a communication device, and a system. Background Art

[0002] In a machine-to-machine (M2M) scenario, the terminal cost can be reduced by reducing the terminal bandwidth (including radio frequency and baseband bandwidth) and the number of receiving lines of the terminal device. However, when the terminal bandwidth (including radio frequency and baseband bandwidth) is reduced, the terminal device will not be able to receive or transmit signals on frequency bands beyond its bandwidth capabilities. Therefore, the physical downlink control channel (PDCCH) cannot support a high aggregation level (AL), resulting in a decline in the performance of the PDCCH. When the number of receiving antennas of the terminal device is reduced, the receiving diversity gain of the PDCCH will be lost, further leading to a decline in the performance of the PDCCH.

[0003] To improve the performance of the PDCCH, more control channel elements (CCEs) can be provided by increasing the number of consecutive time-domain symbols in the control-resource set (CORESET), so that the PDCCH can support a higher AL, thereby achieving the purpose of improving the performance of the PDCCH. However, when the number of consecutive time-domain symbols is greater than 3 symbols, the CORESET will collide with the first demodulation reference signal (DMRS) symbol in mapping type A of the physical downlink shared channel (PDSCH). That is, when the PDCCH and the physical downlink shared channel (PDSCH) are scheduled in the same subframe, the resource configuration method of PDSCH mapping type A cannot be supported. Furthermore, the terminal device can only use mapping type B for time-domain resource scheduling transmission of system information block 1 (SIB1), which will affect the flexibility of the time-domain allocation of the PDSCH carrying SIB1 and the transmission performance of SIB1.

[0004] Therefore, how to provide a PDCCH enhancement method that can enhance the transmission performance of PDCCH while ensuring the flexibility of PDSCH time-domain resource allocation is an urgent problem to be solved. SUMMARY OF THE INVENTION

[0005] The present application provides a method for enhancing a physical downlink control channel, a communication device, and a system, which are conducive to improving the transmission performance of the physical downlink control channel by increasing the number of time-domain continuous symbols in a control resource set, and at the same time ensuring the flexibility of time-domain allocation of the physical downlink shared channel.

[0006] In a first aspect, the present application provides a method for enhancing a physical downlink control channel. This method can be applied to a terminal device or a component (such as a chip, a processor, etc.) of the terminal device. Taking the application of this method to the terminal device as an example, the method includes: the terminal device obtains control resource set (CORESET) configuration information, where the CORESET configuration information is used to configure the time-domain resources and frequency-domain resources of the CORESET. The time-domain resources include X time-domain symbols, and the X time-domain symbols are continuous in the time domain. X is an integer greater than or equal to 1 and less than or equal to M, and M is an integer greater than or equal to 4; the terminal device determines a physical downlink shared channel (PDSCH) time-domain resource configuration set according to the X time-domain symbols, and the PDSCH time-domain resource configuration set is used for PDSCH time-domain resource allocation.

[0007] Based on the method described in the first aspect, the terminal device can provide more control channel elements by increasing the number of time-domain symbols in the CORESET, thereby enhancing the transmission performance of the physical downlink control channel. And the terminal device can determine the time-domain resource configuration information of the physical downlink shared channel according to the number of time-domain symbols in the CORESET, thereby ensuring the flexibility of time-domain resource allocation of the physical downlink shared channel.

[0008] In a possible implementation, the PDSCH time-domain resource configuration set is any one of a PDSCH time-domain resource configuration table, a PDSCH time-domain resource matrix, or a combination of PDSCH time-domain resource allocation information elements. By implementing this possible implementation, the terminal device can determine the PDSCH time-domain resource configuration information from the specific PDSCH time-domain resource configuration set.

[0009] In a possible implementation, when the number of X time domain symbols is less than or equal to 3, the terminal device determines a first set of PDSCH time domain resource configurations, and the first set of PDSCH time domain resource configurations includes the mapping types of PDSCH time domain resources, and the mapping types include mapping type A and mapping type B. By implementing this possible implementation, when the number of time domain symbols included in the CORESET is less than or equal to 3, the terminal device can determine the specific time domain resource configuration information of the PDSCH time domain resources from the first set of PDSCH time domain resource configurations.

[0010] In a possible implementation, when the number of X time domain symbols is greater than 3, the terminal device determines a second set of PDSCH time domain resource configurations, and the second set of PDSCH time domain resource configurations includes at least one set of PDSCH time domain resource allocation information, and the PDSCH time domain resource allocation information includes the mapping type of the PDSCH time domain resource, the starting symbol of the PDSCH time domain, and the length of the PDSCH time domain. Each set of PDSCH time domain resource configuration information in the at least one set of PDSCH time domain resource allocation information corresponds to the row indication information. By implementing this possible implementation, when the number of time domain symbols included in the CORESET is greater than 3, the terminal device can determine the specific time domain resource configuration information of the PDSCH time domain resources from the second set of PDSCH time domain resource configurations.

[0011] In a possible implementation, the terminal device determines the target PDSCH time domain resource allocation information from the second set of PDSCH time domain resource configurations according to the row indication information. By implementing this possible implementation, after the terminal device determines the second set of time domain resource configurations according to the number of time domain symbols of the CORESET, specifically, the terminal device can further determine the specific time domain resource configuration information of the PDSCH through the row indication information.

[0012] In a possible implementation, the terminal device determines the target PDSCH time domain resource allocation information from the second set of PDSCH time domain resource configurations according to the row indication information and the position information of the demodulation reference signal DMRS of the PDSCH time domain resource mapping type A, and the target PDSCH time domain resource allocation information includes time domain resource configuration information such as the mapping type of the PDSCH time domain resource, the starting symbol of the PDSCH time domain, and the length of the PDSCH time domain. By implementing this possible implementation, the terminal device can jointly indicate the specific time domain resource configuration information of the PDSCH according to the row indication information and the position information of the demodulation reference signal DMRS of the PDSCH time domain resource mapping type A, and can support more PDSCH time domain resource configuration information.

[0013] In a possible implementation, the terminal device determines the target Physical Downlink Shared Channel (PDSCH) time-domain resource configuration information from the second PDSCH time-domain resource configuration set according to the time-domain resource allocation indication field in the Downlink Control Information (DCI) carried in the Physical Downlink Control Channel (PDCCH) and / or the position information of the Demodulation Reference Signal (DMRS) of PDSCH time-domain resource classification mapping type A sent by the network device. There is a mapping relationship between the indication status of the time-domain resource allocation indication field in the DCI and the row indication information. By implementing this possible implementation, the terminal device can also jointly indicate the specific time-domain resource configuration information of the PDSCH according to the indication status of the time-domain resource allocation indication field in the DCI that has a mapping relationship with the row indication information and the position information of the DMRS of PDSCH time-domain resource mapping type A.

[0014] In a possible implementation, the Control Resource Set (CORESET) configuration information is CORESET0 configuration information. In this case, the terminal device determines the frequency-domain resource of the downlink initial Bandwidth Part (BWP) according to the frequency-domain resource of CORESET0. By implementing this possible implementation, the terminal device can determine the specific frequency-domain resource through the specific CORESET configuration information, so as to facilitate subsequent communication between the terminal device and the network device.

[0015] In a possible implementation, the terminal device receives the Master Information Block (MIB) from the network device through the Physical Broadcast Channel (PBCH). The MIB includes the configuration information of System Information Block 1, and the configuration information of System Information Block 1 indicates the CORESET configuration information; or, the terminal device receives the MIB from the network device through the PBCH, and the spare bits in the MIB indicate the CORESET configuration information; or, the terminal device receives the new timing bits from the network device through the PBCH, and the new timing bits indicate the CORESET configuration information; or, the terminal device receives the MIB and the new timing bits from the network device through the PBCH, and the MIB and the new timing bits indicate the CORESET configuration information; or, the terminal device receives the indication information from the network device, and the indication information indicates the CORESET configuration information, and the indication information includes one or more of System Information Block 1, Radio Resource Control signaling, Media Access signaling, and Downlink Control Information. By implementing this possible implementation, the terminal device can obtain the CORESET configuration information from different information blocks according to different application scenarios, weakening the limitation of the terminal device to obtain the CORESET configuration information on the scenario and expanding the application scenarios.

[0016] In a possible implementation, the second PDSCH time-domain resource configuration set is predefined or preconfigured; alternatively, the terminal device receives indication information from the network device, and the indication information indicates the configuration information of the second PDSCH time-domain resource configuration set. The indication information includes one or more of System Information Block 1, Radio Resource Control signaling, Media Access signaling, and Downlink Control Information. By implementing this possible implementation, the terminal device can obtain the configuration information of the second PDSCH time-domain resource configuration set from different information blocks according to different application scenarios, weakening the limitation of the scenario for the terminal device to obtain the configuration information of the second PDSCH time-domain resource configuration set and expanding the application scenarios.

[0017] In a second aspect, the present application provides a method for enhancing the physical downlink control channel. This method can be applied to a network device or a component (such as a chip, a processor, etc.) of the network device. Taking the application of this method to the network device as an example, the method includes: the network device sends control resource set (CORESET) configuration information to the terminal device, and the CORESET configuration information is used to configure the time-domain resources and frequency-domain resources of the CORESET. The time-domain resources include X time-domain symbols, and the X time-domain symbols are continuous in the time domain. X is an integer greater than or equal to 1 and less than or equal to M, and M is an integer greater than or equal to 4; the network device and the terminal device communicate using the resources configured by the CORESET configuration information.

[0018] Based on the method described in the second aspect, the network device can send CORESET configuration information to the terminal device, so that the terminal device can increase the number of time-domain symbols of the CORESET according to the CORESET configuration information to provide more control channel units, thereby enhancing the transmission performance of the physical downlink control channel.

[0019] In a feasible implementation, the network device sends a master information block (MIB) to the terminal device through a physical broadcast channel (PBCH). The MIB includes configuration information of system information block 1, and the configuration information of the system information block 1 indicates control resource set (CORESET) configuration information; or, the MIB sent by the network device to the terminal device through the PBCH, and the spare bits in the MIB indicate the CORESET configuration information; or, the network device sends newly added timing bits to the terminal device through the PBCH, and the newly added timing bits indicate the CORESET configuration information; or, the network device sends the MIB and the newly added timing bits to the terminal device through the PBCH, and the MIB and the newly added timing bits indicate the CORESET configuration information; or, the network device sends indication information to the terminal device, and the indication information indicates the CORESET configuration information, and the indication information includes one or more of system information block 1, radio resource control signaling, media access signaling, and downlink control information. By implementing this possible implementation, the network device can select different information blocks as the carrier of the CORESET configuration information according to different application scenarios, weakening the limitation of the network device sending the CORESET configuration information on the scenario and expanding the application scenarios.

[0020] In a possible implementation, the second physical downlink shared channel (PDSCH) time domain resource configuration set is predefined or preconfigured; or, the network device sends indication information to the network device, and the indication information indicates the configuration information of the second PDSCH time domain resource configuration set, and the indication information includes one or more of system information block 1, radio resource control signaling, media access signaling, and downlink control information. By implementing this possible implementation, the terminal device can obtain the configuration information of the second PDSCH time domain resource configuration set from different information blocks according to different application scenarios, weakening the limitation of the terminal device obtaining the configuration information of the second PDSCH time domain resource configuration set on the scenario and expanding the application scenarios.

[0021] In a third aspect, the present application provides a communication device, which may be a device in the terminal device or a device that can be used in matching with the terminal device. Among them, the communication device may also be a chip system. The communication device can execute the method described in the first aspect. The functions of the communication device can be implemented by hardware or by hardware executing corresponding software. The hardware or software includes one or more units corresponding to the above functions. The unit may be software and / or hardware. The operations and beneficial effects performed by the communication device can refer to the method and beneficial effects described in the first aspect above, and the repeated parts will not be elaborated.

[0022] Fourthly, the present application provides a communication device, which may be a device in a network device or a device that can be used in combination with a network device. Among them, the communication device may also be a chip system. The communication device can execute the method described in the second aspect. The functions of the communication device can be implemented by hardware or by hardware executing corresponding software. The hardware or software includes one or more units corresponding to the above functions. The unit may be software and / or hardware. For the operations and beneficial effects executed by the communication device, reference may be made to the method and beneficial effects described in the second aspect above, and repeated parts will not be elaborated.

[0023] Fifthly, a communication device is provided. The communication device may be the terminal device in the above method embodiments or a chip disposed in the terminal device. The communication device includes a communication interface and a processor. Optionally, a memory is further included. Among them, the memory is used to store computer programs or instructions. The processor is coupled to the memory and the communication interface. When the processor executes the computer programs or instructions, the communication device executes the method executed by the terminal device in the above method embodiments.

[0024] Sixthly, a communication device is provided. The communication device may be the network device in the above method embodiments or a chip disposed in the network device. The communication device includes a communication interface and a processor. Optionally, a memory is further included. Among them, the memory is used to store computer programs or instructions. The processor is coupled to the memory and the communication interface. When the processor executes the computer programs or instructions, the communication device executes the method executed by the network device in the above method embodiments.

[0025] Seventhly, the present application provides a computer-readable storage medium for storing computer-executable instructions. When the computer-executable instructions are executed, the method executed by the terminal device in the method described in the first aspect is implemented.

[0026] Eighthly, the present application provides a computer-readable storage medium for storing computer-executable instructions. When the computer-executable instructions are executed, the method executed by the network device in the method described in the second aspect is implemented.

[0027] Ninthly, the present application provides a computer program product including a computer program. When the computer program is executed, the method executed by the terminal device in the method described in the first aspect is implemented.

[0028] Tenthly, the present application provides a computer program product including a computer program. When the computer program is executed, the method executed by the network device in the method described in the second aspect is implemented.

[0029] In the eleventh aspect, the present application provides a communication system, which includes the communication device described in the third aspect or the fifth aspect and the communication device described in the fourth aspect or the sixth aspect above. Description of the Drawings

[0030] Figure 1 It is a schematic diagram of a physical downlink control channel enhancement system architecture provided by an embodiment of the present application;

[0031] Figure 2 It is a schematic diagram of the composition of CORESET resources provided by an embodiment of the present application;

[0032] Figure 3 It is a schematic flowchart of a method for enhancing a physical downlink control channel provided by an embodiment of the present application;

[0033] Figure 4 It is a schematic diagram of a method for determining CORESET configuration information provided by an embodiment of the present application;

[0034] Figure 5 It is a schematic flowchart of another method for enhancing a physical downlink control channel provided by an embodiment of the present application;

[0035] Figure 6 It is a schematic diagram of time-frequency resources during the initial access process of a capability-reduced terminal device and a normal terminal device provided by an embodiment of the present application;

[0036] Figure 7 It is a schematic diagram of an application scenario of a method for enhancing a physical downlink control channel provided by an embodiment of the present application;

[0037] Figure 8 It is a schematic diagram of the structure of a communication device provided by an embodiment of the present application;

[0038] Figure 9 It is a schematic diagram of the structure of another communication device provided by an embodiment of the present application. Detailed Embodiments

[0039] In order to make the objectives, technical solutions, and advantages of the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings.

[0040] In the description, claims, and drawings of this application, terms such as "first" and "second" are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of operations or units is not limited to the listed operations or units, but optionally further includes operations or units not listed, or optionally further includes other operations or units inherent to these processes, methods, products, or devices.

[0041] The mention of "embodiment" in this application means that the specific features, structures, or characteristics described in connection with the embodiment can be included in at least one embodiment of this application. The phrase appears in various positions in the description does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0042] In this application, "at least one (item)" means one or more, "a plurality" means two or more, "at least two (items)" means two or three or more, and "and / or" is used to describe the corresponding relationship of the corresponding objects, indicating that three relationships can exist. For example, "A and / or B" can represent: only A exists, only B exists, and both A and B exist at the same time. Among them, A and B can be singular or plural. The character " / " generally represents an "or" relationship between the corresponding objects before and after. "At least one of the following (item)" or its similar expression refers to any combination of these items, including any combination of single item (s) or plural item (s). For example, at least one of a, b, or c can represent: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, c can be single or multiple.

[0043] To better understand the solution provided by this application, the system architecture of this application will be introduced first as follows:

[0044] The method provided by the embodiments of this application can be applied to various communication systems. For example, it can be an Internet of Things (IoT) system, a Narrow Band Internet of Things (NB-IoT) system, a Long Term Evolution (LTE) system, or a 5th-generation (5G) communication system. It can also be an LTE and 5G hybrid architecture, or a 5G New Radio (NR) system, as well as new communication systems emerging in the future development of communications.

[0045] Please refer to Figure 1 , Figure 1 which is a schematic diagram of a physical downlink control channel enhancement system architecture provided by an embodiment of the present application. This system architecture is a massive machine type communication (mMTC) system architecture. As Figure 1 shown, this system architecture includes a terminal device 101 and a network device 102. Among them, the terminal devices 101 can communicate with each other, and the terminal device 101 and the network device 102 can communicate with each other. It should be noted that the number of the terminal devices 101 is only exemplary, and the embodiment of the present application does not specifically limit the number of the terminal devices 101. The terminal device 101 can be a reduced capability (REDCAP) terminal device or a normal (hereinafter referred to as NR legacy) terminal device without reducing the channel bandwidth.

[0046] In the embodiment of the present application, after the time and frequency synchronization between the terminal device 101 and the network device 102, the network device 102 sends CORESET configuration information to the terminal device 101. The terminal device 101 receives the CORESET configuration information and determines the time domain resources and frequency domain resources of the CORESRT according to the CORESRT configuration information. Among them, the time domain resources include X time domain symbols, and the X time domain symbols are continuous in the time domain. The X is an integer greater than or equal to 1 and less than or equal to M, and M is an integer greater than or equal to 4. Further, the terminal device can determine a PDSCH time domain resource configuration set according to the X time domain symbols, and the time domain resource configuration set is used for PDSCH time domain resource allocation. In this way, the terminal device can provide more control channel units by increasing the number of time domain symbols of the CORESET, thereby enhancing the transmission performance of the physical downlink control channel, and the terminal device can determine the time domain resource configuration information of the PDSCH according to the number of time domain symbols of the CORESET, so as to ensure the flexibility of the PDSCH time domain resource allocation.

[0047] The terminal device involved in the embodiments of the present application is an entity on the user side for receiving or transmitting signals. The terminal device can be a device that provides voice and / or data connectivity to users. For example, it can be a handheld device, a vehicle-mounted device, etc. with wireless connection capabilities. The terminal device can also be other processing devices connected to a wireless modem. The terminal device can communicate with a radio access network (RAN). The terminal device can also be referred to as a wireless terminal device, a subscriber unit, a subscriber station, a mobile station, a mobile, a remote station, an access point, a remote terminal, an access terminal, a user terminal, a user agent, a user device, or a user equipment (UE), etc. The terminal device can be a mobile terminal device, such as a mobile phone (or a "cellular" phone) and a computer with a mobile terminal device. For example, it can be a portable, pocket-sized, handheld, computer-integrated, or vehicle-mounted mobile device that exchanges language and / or data with the wireless access network. For example, the terminal device can also be a personal communication service (PCS) phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA), etc. Common terminal devices include, for example: cars, drones, robotic arms, mobile phones, tablet computers, laptop computers, palmtop computers, mobile internet devices (MIDs), wearable devices, such as smart watches, smart bracelets, pedometers, etc., but the embodiments of the present application are not limited thereto.

[0048] In the embodiments of the present application, the network device (or access network device) involved is an entity on the network side for transmitting or receiving signals. It can be used to mutually convert the received air frames and Internet Protocol (IP) packets, and act as a router between the terminal device and the rest of the access network, where the rest of the access network may include an IP network, etc. The access network device can also coordinate the attribute management of the air interface. For example, the access network device can be an evolved Node B (eNB or e-NodeB) in LTE, can also be a new radio controller (NR controller), can also be an ng-eNB, can also be a gNode B (gNB) in a 5G system, can also be a centralized unit, can also be a new radio base station, can also be a remote radio head, can also be a micro base station, can also be a relay, can also be a distributed unit, can also be a transmission reception point (TRP) or a transmission point (TP), or any other radio access device, but the embodiments of the present application are not limited thereto.

[0049] To better understand the solution provided by the present application, the following introduces the relevant terms involved in the embodiments of the present application:

[0050] The physical downlink control channel (PDCCH) is transmitted in the form of control channel elements (CCEs), that is, a CCE is the smallest resource unit for PDCCH transmission. A PDCCH can include one or more CCEs, and the number of CCEs included in a PDCCH is determined by the aggregation level (AL). For details, please refer to Table 1.

[0051] Table 1

[0052] Aggregation level Number of CCEs 1 1 2 2 4 4 8 8 16 16

[0053] Among them, 1 CCE can transmit 1 downlink control information (DCI). If the terminal device is far away and the signal is poor and cannot demodulate the PDCCH, it is necessary to increase the aggregation level to improve the reception performance of the PDCCH so that the remote terminal device can also successfully demodulate the PDCCH. A CCE includes 6 resource element groups (REGs). A REG occupies 1 orthogonal frequency division multiplexing (OFDM) symbol (i.e., the time domain symbol mentioned later) in the time domain and 1 resource block (RB) in the frequency domain. A CCE includes 72 resource elements (REs). One RE carries 2 bits (bits). Excluding the 3 REs in one REG occupied by the PDCCH demodulation reference signal (DMRS), one CCE can carry 108 bits.

[0054] Control resource set (CORESET), and CORESET represents the time-frequency resource set used to carry the PDCCH. 1 CORESET includes one or more RBs in the frequency domain, which can be expressed as It can be indicated by the frequency domain resources in the high-layer parameter control resource set information element (IE). 1 CORESET includes 1, 2, or 3 OFDM symbols in the time domain, which can be expressed as It can be indicated by the duration in the high-layer parameter control resource set IE. When the high-layer parameter duration = 3, that is, the number of symbols of the CORESET indicated by duration is 3, The number of REGs included in 1 CORESET can be expressed as For the schematic diagram of the resource composition of the specific CORESET, please refer to Figure 2 As shown, a CORESET (i.e., the resources used by a PDCCH) is aggregated by one or more CCEs within a CORESET (i.e., the supported AL). One CCE consists of 6 REGs. Each REG is equal to one symbol in the time domain and one RB in the frequency domain. One RB includes 12 REs in the frequency domain.

[0055] PDSCH mapping type A is one of the two PDSCH time-domain resource mapping types in the NR system. Mapping type A means that the starting symbol position of the physical downlink shared channel (PDSCH) can be {0, 1, 2, 3}. When the PDSCH and PDCCH are scheduled in the same slot, the PDCCH is located in one or more of the first 3 OFDM symbols of that slot. Scheduling in the same slot means that the PDCCH and the PDSCH scheduled by this PDCCH are in the same slot. Cross-slot scheduling means that the PDCCH can schedule the PDSCH across slots, and the PDCCH and the PDSCH scheduled by this PDCCH are in different slots.

[0056] PDSCH mapping type B is one of the two PDSCH time-domain resource mapping types in the NR system. Mapping type B means that the starting symbol position of the PDSCH can be {0, …, 12}. When the PDCCH and PDSCH are scheduled in the same slot, the starting symbol of the PDCCH is not later than the starting symbol of the PDSCH scheduled by this PDCCH.

[0057] From the perspective of the number of PDSCH time-domain symbols, the scheduling types of PDSCH can be divided into slot scheduling and mini-slot scheduling. A mini-slot includes two or more OFDM symbols, but the number of OFDM symbols included in a mini-slot is less than the number of OFDM symbols included in a slot. For example, a slot includes 14 OFDM symbols and a mini-slot includes 7 OFDM symbols. Among them, the PDCCH scheduling the PDSCH can also be described as DCI scheduling the PDSCH, or control information scheduling the PDSCH, etc.

[0058] The starting symbol position and time-domain length of the PDSCH can be seen in Table 2.

[0059] Table 2

[0060]

[0061] Remark 1 in Table 2: Only when DMRS-typeA-position = 3, S = 3, which means that only when the position of DMRS is at symbol 3, the starting symbol position of TypeA can be equal to 3. As can be seen from Table 2, for slot scheduling and mini-slot scheduling, the sum of the starting symbol position of PDSCH and the time domain length will not exceed the number of symbols included in one slot. Currently in the present invention, it is also allowed that the sum of the starting symbol position of PDSCH and the time domain length exceeds the number of symbols included in one slot, and it is not limited in the present invention.

[0062] A reduced-capability (REDCAP) terminal device refers to a terminal device with reduced terminal capabilities in the mMTC scenario or M2M communication scenario, where the reduction of terminal capabilities includes reduction of terminal bandwidth, reduction of receive / transmit antennas, etc. The terminal bandwidth includes radio frequency bandwidth and base station bandwidth. In other words, the bandwidth capability of a REDCAP terminal device is less than that of an existing (legacy) terminal device with unchanged bandwidth capability.

[0063] If the terminal device with reduced capabilities is called the first terminal device and the existing terminal is called the second terminal device, the differences between the first terminal device type and the second terminal device type may include at least one of the following:

[0064] 1. Different bandwidth capabilities. For example, the carrier bandwidth of the first terminal device is not greater than 50 MHz, such as at least one of 50 MHz, 40 MHz, 20 MHz, 15 MHz, 10 MHz or 5 MHz, and the carrier bandwidth of the second terminal device is greater than 50 MHz.

[0065] 2. Different numbers of transceiver antennas. For example, the first terminal device can support 2 receive and 1 transmit (2 receive antennas and 1 transmit antenna), or 1 receive and 1 transmit (1 receive antenna and 1 transmit antenna). The second terminal device can support 4 receive and 2 transmit (4 receive antennas and 2 transmit antennas). It can be understood that under the condition of achieving the same data transmission rate, since the number of transceiver antennas of the first terminal device is less than that of the second terminal device, the maximum coverage range that can be achieved for data transmission between the first terminal device and the base station is less than the maximum coverage range that can be achieved for data transmission between the second terminal device and the base station.

[0066] 3. Different maximum uplink transmission powers. For example, the maximum uplink transmission power of the first terminal device can be a value between 4 dBm and 20 dBm. The maximum uplink transmission power of the second terminal device can be 23 dBm or 26 dBm.

[0067] 4. Different protocol versions. The first terminal device can be a terminal device in NR version 17 (release-17, Rel-17) or a version later than NR Rel-17. The second terminal device can be, for example, a terminal device in NR version 15 (release-15, Rel-15) or NR version 16 (release-16, Rel-16). The second terminal device can also be referred to as an NR legacy terminal device.

[0068] 5. Different carrier aggregation capabilities. For example, the first terminal device does not support carrier aggregation, while the second terminal device supports carrier aggregation. Another example is that both the first terminal device and the second terminal device support carrier aggregation, but the maximum number of carriers that the first terminal device can simultaneously support is less than that of the second terminal device. For example, the first terminal device can support the aggregation of at most 2 carriers simultaneously, while the second terminal device can support the aggregation of at most 5 carriers or 32 carriers simultaneously.

[0069] 6. Different duplex capabilities. For example, the first terminal device supports half-duplex frequency division duplexing (FDD), and the second terminal device supports full-duplex FDD.

[0070] 7. Different data processing time capabilities. For example, the minimum delay between the first terminal device receiving downlink data and sending feedback on the downlink data is greater than that of the second terminal device; and / or, the minimum delay between the first terminal device sending uplink data and receiving feedback on the uplink data is greater than that of the second terminal device.

[0071] 8. Different processing abilities (ability / capability). For example, the baseband processing ability of the first terminal device is lower than that of the second terminal device. Among them, the baseband processing ability can include at least one of the following: the maximum multiple-input multiple-output (MIMO) layers supported by the terminal device during data transmission, the number of hybrid automatic repeat request (HARQ) processes supported by the terminal device, and the maximum transmission block size (TBS) supported by the terminal device.

[0072] 9. The uplink and / or downlink transmission peak rates are different. The transmission peak rate refers to the maximum data transmission rate that a terminal device can achieve per unit time (e.g., per second). The uplink peak rate supported by the first terminal device may be lower than the uplink peak rate supported by the second terminal device, and / or the downlink peak rate supported by the first terminal device may be lower than the downlink peak rate supported by the second terminal device. For example, the uplink peak rate of the first terminal device is less than or equal to 50 Mbps, and the downlink peak rate is less than or equal to 150 Mbps; the uplink peak rate of the second terminal device is greater than or equal to 50 Mbps, and the downlink peak rate is greater than or equal to 150 Mbps. Another example is that the uplink peak rate or downlink of the first terminal device is in the order of hundreds of Mbps, and the uplink peak rate or downlink peak rate of the second terminal device is in the order of Gbps.

[0073] 10. The buffer size is different. The buffer can be understood as the total size of the Layer 2 (L2) buffer, which is defined as the sum of the number of bytes buffered by the terminal device for all radio bearers in the radio link control (RLC) transmit window, receive, and reordering window and the number of bytes buffered in the packet data convergence protocol (PDCP) reordering window. Alternatively, the buffer can also be understood as the total number of soft channel bits available for HARQ processing.

[0074] It should be noted that the reduced capability (REDCAP) terminal device mentioned in the embodiments of this application is only an example of the first terminal type including the above-mentioned distinguishing features. In other words, the first terminal type is a terminal device including at least one of the above-mentioned distinguishing features of the first terminal device, and the first terminal type includes but is not limited to the reduced capability (REDCAP) terminal device. The existing terminal device (or the NR legacy terminal device mentioned later) is only an example of the first terminal type including the above-mentioned distinguishing features. In other words, the second terminal type is a terminal device including at least one of the above-mentioned distinguishing features of the second terminal device, and the second terminal type includes but is not limited to the existing terminal device (or the NR legacy terminal device mentioned later).

[0075] The physical downlink control channel enhancement method provided by the embodiments of this application will be further described in detail below:

[0076] Please refer to Figure 3 , Figure 3 which is a schematic flowchart of a physical downlink control channel enhancement method provided by the embodiments of this application. As Figure 3As shown, the method for enhancing the physical downlink control channel includes the following steps 301 to 303. Figure 3 The subject executing the method shown can be a terminal device and a network device, or the subject can be a chip in the terminal device and a chip in the network device. Figure 3 Taking the terminal device and the network device as the execution entities of the method as an example for illustration. Among them:

[0077] 301. The network device sends CORESET configuration information to the terminal device. The CORESET configuration information is used to configure the time-domain resources and frequency-domain resources of the CORESET. Among them, the time-domain resources include X time-domain symbols, and the X time-domain symbols are continuous in the time domain. X is an integer greater than or equal to 1 and less than or equal to M, and M is an integer greater than or equal to 4.

[0078] The network device generates (or determines) the CORESET configuration information and broadcasts (or sends) the CORESET configuration information to the terminal device. It should be noted that M represents the maximum number of time-domain symbols supported on the CORESET time-frequency resource allocation table. For example, when M takes the value of 6, the maximum number of time-domain symbols of the CORESET configured by the terminal device according to the CORESET configuration information can be 6 time-domain symbols, that is, the maximum value of X is 6. The CORESET configuration information can configure one or more CORESETs. In this case, the frequency-domain resources between each CORESET can overlap with each other, can partially overlap with each other, or can completely non-overlap.

[0079] Among them, the CORESET configuration information can be row indication information, and each row indication information corresponds to parameter information of the preset time-domain resources and frequency-domain resources of the CORESET. In such a case, the network device can send the row indication information to the terminal device to dynamically configure the time-domain resource parameter information and frequency-domain resource parameter information included in the CORESET configuration information. Optionally, the CORESET configuration information can also be the parameter information of the preset time-domain resources and frequency-domain resources of the CORESET. It should be noted that the parameter information of the preset time-domain resources and frequency-domain resources of the CORESET includes the number of time-domain symbols and the number of resource blocks (RBs) in the frequency domain. For CORESET0, the CORESET configuration information can also include the multiplexing mode of the synchronization signal block (SS / PBCH block, SSB) and the CORESET, and the offset parameter value between the CORESET and the SSB, etc.

[0080] In an application scenario, there is a preset set of CORESET configuration information in the communication protocol. The set of CORESET configuration information includes at least one set of CORESET configuration information. Each set of CORESET configuration information includes the number of resource blocks (RBs) in the frequency domain and the number of time domain symbols, and each set of CORESET configuration information corresponds to row indication information. For CORESET0, the CORESET configuration information may further include the multiplexing mode of the synchronization signal block (SS / PBCH block, SSB) and the CORESET, and the offset parameter value between the CORESET and the SSB, etc. In such a case, the network device can broadcast (or send) the row indication information to the terminal device, so that the terminal device can determine the time domain resources and frequency domain resources of the CORESET from the preset set of CORESET configuration information according to the row indication information. That is, the network device can dynamically configure the time domain resource parameter information and frequency domain resource parameter information included in the CORESET configuration information through the row indication information. Exemplarily, as Figure 4 shown in the time-frequency resource allocation table of CORESET0 when the subcarrier spacing (SCS) of {SSB, PDCCH} is {15, 30} kHz. When the terminal device receives the row indication information of the CORESET0 configuration information as shown in Module 40, in this case, the terminal device can determine that the CORESET0 configuration information is as shown in Module 41 from the time-frequency resource allocation table of CORESET0 according to the row indication information of Module 40, and the parameter information of the time domain resources and frequency domain resources of CORESET0: "The multiplexing mode of SSB and CORESET is Multiplexing Mode 1, 24 RBs, 2 time domain symbols, and the offset parameter value is 5".

[0081] In another application scenario, the network device can also broadcast (or send) the CORESET configuration information to the terminal device. The CORESET configuration information includes the number of resource blocks (RBs) in the frequency domain and the number of time domain symbols. For CORESET0, the CORESET configuration information may further include the multiplexing mode of the synchronization signal block (SS / PBCH block, SSB) and the CORESET, and the offset parameter value between the CORESET and the SSB, etc. Exemplarily, taking the CORESET configuration information as the CORESET0 configuration information as an example, in this case, the network device can send the CORESET0 configuration information to the terminal device as: "The multiplexing mode of SSB and CORESET is Multiplexing Mode 1, 24 RBs, 2 time domain symbols, and the offset parameter value is 5".

[0082] 302. The terminal device obtains the CORESET configuration information and determines a PDSCH time-domain resource configuration set according to X time-domain symbols. This PDSCH time-domain resource configuration set is used for PDSCH time-domain resource allocation.

[0083] The terminal device receives the CORESET configuration information and determines the time-domain resource and frequency-domain resource of the CORESET according to this CORESET configuration information. Further, the terminal device can determine a target PDSCH time-domain resource configuration set from the PDSCH time-domain resource configuration set according to X time-domain symbols in the CORESET, and determine the PDSCH time-domain resource configuration information according to this target PDSCH time-domain resource configuration set.

[0084] Wherein, the PDSCH time-domain resource configuration set can be either a PDSCH time-domain resource configuration table or a PDSCH time-domain resource matrix. This PDSCH time-domain resource configuration set includes at least one group of PDSCH time-domain resource allocation information. This PDSCH time-domain resource configuration set can include but is not limited to a first PDSCH time-domain resource configuration set and a second PDSCH time-domain resource configuration set. The first PDSCH time-domain resource configuration set includes the mapping type of the PDSCH time-domain resource, and this mapping type includes mapping type A and mapping type B. The second PDSCH time-domain resource configuration set includes at least one group of PDSCH time-domain resource allocation information, and this PDSCH time-domain resource allocation information includes at least one of the mapping type of the PDSCH time-domain resource, the starting symbol of the PDSCH time-domain, or the length of the PDSCH time-domain.

[0085] In one implementation manner, each group of PDSCH time-domain resource configuration information in this second DSCH time-domain resource configuration set corresponds to row indication information. In other words, each group of PDSCH time-domain resource configuration information has corresponding row indication information, and the PDSCH time-domain resource configuration information can be determined according to the row indication information.

[0086] In another implementation manner, each group of PDSCH time-domain resource configuration information in this second DSCH time-domain resource configuration set corresponds to row indication information. In other words, each group of PDSCH time-domain resource configuration information has corresponding row indication information, and the PDSCH time-domain resource configuration information can be jointly determined according to the row indication information and the DMRS position of PDSCH mapping type A.

[0087] In a possible implementation, the second PDSCH time-domain resource configuration set is predefined or preconfigured; or, the network device sends indication information to the terminal device, and this indication information indicates the configuration information of the second PDSCH time-domain resource configuration set. The indication information includes one or more of system information block 1, radio resource control signaling, media access signaling, and downlink control information.

[0088] In a possible implementation, when the number of time domain symbols included in the CORESET is less than or equal to 3, the terminal device may determine a first PDSCH time domain resource configuration set. Further, the terminal device may determine the time domain resource configuration information of the PDSCH according to the first PDSCH time domain resource configuration set.

[0089] Exemplarily, the first PDSCH time domain resource configuration set is the first PDSCH time domain resource allocation table shown in Table 3. When the time domain resources of the CORESET configured by the terminal device according to the CORESET configuration information include 2 symbols, the terminal device may determine the first PDSCH time domain resource configuration set (or also referred to as the first PDSCH time domain resource configuration table) shown in Table 3. Further, the terminal device may determine the time domain resource configuration information of the PDSCH according to the first PDSCH time domain resource configuration set.

[0090] Table 3

[0091]

[0092]

[0093] Wherein, K0 is the offset (time slot) between the PDCCH and the PDSCH, S is the starting symbol of the PDSCH, and L is the time domain length (symbols) of the PDSCH. It should be noted that the PDSCH time domain resource configuration information included in the first PDSCH time domain resource allocation table can be calculated by developers according to the experimental environment data and can be adjusted accordingly according to specific application scenarios, which will not be specifically limited here.

[0094] It should be noted that in the first PDSCH time domain resource allocation table, the mapping types of the PDSCH time domain resources include mapping type A (TypeA) and mapping type B (TypeB). In the first PDSCH time domain resource allocation table, when the starting symbol of the PDSCH is greater than 3, only the PDSCH time domain resource configuration information with the mapping type of TypeB can be used.

[0095] In a possible implementation, when the number of time domain symbols included in the CORESET is greater than 3, the terminal device determines a second PDSCH time domain resource configuration set. Further, the terminal device may determine the time domain resource configuration information of the PDSCH according to the second PDSCH time domain resource configuration set.

[0096] Exemplarily, the second PDSCH time-domain resource configuration set is the second PDSCH time-domain resource allocation table shown in Table 4. When the time-domain resources of the CORESET configured by the terminal device according to the CORESET configuration information include 5 symbols, the terminal device can determine the second PDSCH time-domain resource configuration set (or also referred to as the second PDSCH time-domain resource configuration table) shown in Table 4. Furthermore, the terminal device can determine the time-domain resource configuration information of the PDSCH according to the first PDSCH time-domain resource configuration set.

[0097] Table 4

[0098]

[0099]

[0100] Among them, K0 is the offset (time slot) between the PDCCH and the PDSCH, S is the starting symbol of the PDSCH, and L is the time-domain length (symbols) of the PDSCH. It should be noted that the PDSCH time-domain resource configuration information included in this second PDSCH time-domain resource allocation table is all calculated by the developer based on the experimental environment data and can be adjusted accordingly according to the specific application scenario, which is not specifically limited here.

[0101] It should be noted that this second PDSCH time-domain resource allocation table may only include the PDSCH time-domain resources with the mapping type of TypeB, or may also include the PDSCH time-domain resources with the mapping type of TypeA and the PDSCH time-domain resources of TypeB at the same time, which is not forcibly limited here.

[0102] In a possible implementation, the second PDSCH time-domain resource configuration set may include one or more of the following principles: 1. The PDSCH time-domain resource allocation starts from the first time-domain symbol after the CORESET; 2. The CORESET corresponding to the PDSCH time-domain resource configuration set may include a maximum of 6 time-domain symbols; 3. Support partial or all of the PDSCH time-domain resource allocation information with the mapping type of TypeB included in the first PDSCH time-domain resource configuration set; 4. The value range of the PDSCH time-domain length (symbols) L is {4, 5,..., 14 - S}.

[0103] 303. The network device and the terminal device communicate using the resources configured by the CORESET configuration information.

[0104] After the terminal device determines the frequency-domain resources and time-domain resources of the CORESET according to the CORESET configuration information, the network device can use the frequency-domain resources and time-domain resources of the CORESET to communicate with the terminal device (i.e., transmit control information or data information). Among them, the resources configured by the CORESET configuration information can include the time-domain resources and frequency-domain resources of the CORESET, and can also include the time-domain resources and frequency-domain resources of the PDCCH obtained according to the CORESET, and the time-domain resources and frequency-domain resources of the PDSCH configured according to the CORESET.

[0105] For a REDCAP terminal device in the connected state or inactive state in NR, when the network device does not configure a set of PDSCH time-domain resource configurations exclusive to the terminal device or common to the serving cell, there will be a situation where the PDSCH time-domain resource allocation of the REDCAP terminal device is restricted. In a possible implementation, the CORESET configured by the CORESET configuration information in the embodiments of the present application can be either the CORESET with an index value of 0 (i.e., CORESET0) or any one of the CORESETs with a non-zero index value. By implementing such a method, the problem of restricted PDSCH time-domain resource allocation of the REDCAP terminal device can be solved.

[0106] It can be seen that by implementing Figure 3 the described method for enhancing the physical downlink control channel, the terminal device can determine the time-domain resources and frequency-domain resources of the CORESET according to the CORESET configuration information sent by the network device. The number of time-domain symbols included in the time-domain resources of the CORESET can be greater than 3. In other words, the terminal device can provide more control channel units by increasing the number of time-domain symbols of the CORESET, thereby enhancing the transmission performance of the physical downlink control channel. And the terminal device can determine the time-domain resource configuration information of the physical downlink shared channel according to the number of time-domain symbols of the CORESET, thereby ensuring the flexibility of the time-domain resource allocation of the physical downlink shared channel.

[0107] Please refer to Figure 5 , Figure 5 which is a schematic flowchart of another method for enhancing the physical downlink control channel provided by the embodiments of the present application. As Figure 5 shown, the CORESET configuration information is the CORESET0 configuration information, and the CORESET0 configuration information is used to configure the time-domain resources and frequency-domain resources of CORESET0. Among them:

[0108] 501. The network device sends CORESET0 configuration information to the terminal device. The CORESET0 configuration information is used to configure the time-domain resources and frequency-domain resources of CORESET0. Among them, the time-domain resources include X time-domain symbols, and the X time-domain symbols are continuous in the time domain. X is an integer greater than or equal to 1 and less than or equal to M, and M is an integer greater than or equal to 4.

[0109] Exemplarily, before step 501, the network device generates (or determines) the CORESET0 configuration information. The network device may use the broadcast method and broadcast the CORESET0 configuration information to the terminal device. Among them, the CORESET0 configuration information may be row indication information, and each row indication information corresponds to parameter information of the time-domain resources and frequency-domain resources of a preset CORESET. Among them, the CORESET0 configuration information may also be the parameter information of the time-domain resources and frequency-domain resources of the preset CORESET0.

[0110] In a possible implementation, during the NR initial access process of the terminal device, the network device may send the MIB to the terminal device through the PBCH. The MIB includes the configuration information of system information block 1. Among them, the configuration information of system information block 1 indicates the CORESET0 configuration information of the control resource set. For example, the network device may indicate the CORESET0 configuration information through the configuration information of system information block 1 in the MIB (also known as the pdcch-ConfigSIB1 parameter).

[0111] Optionally, in the scenario of the NR initial access of the terminal device, the network device may send the MIB to the terminal device through the PBCH. The spare bits in the MIB indicate the CORESET0 configuration information of the control resource set.

[0112] Optionally, during the NR initial access process of the terminal device, when the NR frequency band is FR1 (450 MHz - 6000 MHz, also known as Sub-6 GHz), the network device may also send newly added timing bits to the terminal device through the PBCH. The newly added timing bits indicate the CORESET0 configuration information of the control resource set. Exemplarily, the network device may indicate the CORESET0 configuration information through the 2 high-order bits in the newly added (or additionally added) timing-related bits in the PBCH.

[0113] Optionally, during the NR initial access process of the terminal device, when the NR frequency band is FR1, the network device may send the MIB and newly added timing bits to the terminal device through the PBCH. The MIB and the newly added timing bits indicate the CORESET0 configuration information of the control resource set.

[0114] In another possible implementation, in the scenario where the terminal device is not in the initial access to NR. In other words, the terminal device has ever been connected to the network device or has ever camped on the serving cell corresponding to the network device. In this case, the network device sends indication information to the terminal device, and the indication information indicates the configuration information of the control resource set CORESET0, where the indication information includes one or more of the system information block 1, radio resource control signaling, media access signaling, and downlink control information.

[0115] 502. The terminal device obtains the CORESET0 configuration information and configures the time-domain resource and frequency-domain resource of CORESET0 according to the CORESET0 configuration information.

[0116] Among them, the terminal device can be an NR REDCAP terminal device and / or an NR legacy terminal device. Since the bandwidth capabilities of the NR REDCAP terminal device and the NR legacy terminal device are different, the NR REDCAP terminal device and the NR legacy terminal device can respectively use independent methods or mechanisms for obtaining the CORESET0 configuration information, or can also use the same method or mechanism for obtaining the CORESET0 configuration information.

[0117] In an application scenario, the mMTC scenario includes two types of terminal devices: the NR REDCAP terminal device and the NR legacy terminal device. The NR REDCAP terminal device and the NR legacy terminal device share the same set of SSBs (that is, the same method or mechanism for obtaining the CORESET0 configuration information as described above). In this case, the network device can indicate the CORESET0 configuration information of the NR REDCAP terminal device through the pdcch-ConfigSIB1 parameter in the MIB, and at the same time, also indicate the CORESET0 configuration information of the NR legacy terminal device through the pdcch-ConfigSIB1 parameter in the MIB. That is, the NR REDCAP terminal device detects or receives the SSB broadcast by the network device and synchronizes the time and frequency with the network device based on the SSB. Further, the NR REDCAP terminal device can obtain the MIB carried by the PBCH and obtain the CORESET0 configuration information from the predefined or preconfigured CORESET #0A time-frequency resource configuration table according to the CORESET0 configuration information in the MIB. For example, as shown in Table 5. It should be noted that Table 5 is the predefined or preconfigured time-domain resource and frequency-domain resource of CORESET. When the {SSB, PDCCH} SCS is the time-frequency resource allocation table of the CORESET with {15, 30} kHz, it can be called the CORESET #0A time-frequency resource configuration table.

[0118] Table 5

[0119]

[0120]

[0121] Among them, the CORESET time-frequency resource configuration information in the preset CORESET#0A time-frequency resource configuration table is all calculated by developers based on experimental environment data, and can be adjusted accordingly according to specific application scenarios in the future, and no specific limitation is made here.

[0122] Exemplarily, the NR REDCAP terminal device detects or receives the SSB broadcast by the network device, and the NR REDCAP terminal device synchronizes time and frequency with the network device based on the SSB. Further, the NR REDCAP terminal device can obtain the MIB carried by the PBCH, obtain the configuration information of system information block 1 (also known as pdcch-ConfigSIB1) parameter carried in the MIB, and obtain the time-domain resource and frequency-domain resource of CORESET0 according to the row indication information 0 from the CORESET#0A configuration table shown in Table 5: "The multiplexing mode of SSB and CORESET is multiplexing mode 1, 24 RBs, 2 time-domain symbols, and the offset parameter value is 5".

[0123] The NR legacy terminal device detects or receives the SSB broadcast by the network device, and the NR legacy terminal device synchronizes time and frequency with the network device based on the SSB. Further, the NR legacy terminal device can obtain the MIB carried by the PBCH, and obtain the CORESET0 configuration information from the preset CORESET#0 time-frequency resource configuration table shown in Table 6 according to the CORESET0 configuration information in the MIB. It should be noted that Table 6 is the CORESET time-frequency resource allocation table of the preset CORESET time-domain resource and frequency-domain resource defined by the communication protocol Rel-15 / 16 when {SSB, PDCCH} SCS is {15, 30} kHz, also known as the CORESET#0 time-frequency resource configuration table. The CORESET time-frequency resource configuration information in the CORESET#0 time-frequency resource configuration table is obtained according to the communication protocol or calculated by developers based on experimental data.

[0124] Table 6

[0125]

[0126]

[0127] In another application scenario, the mMTC scenario includes two types of terminal devices: NR REDCAP terminal devices and NR legacy terminal devices. The NR REDCAP terminal devices and the NR legacy terminal devices each use independent SSBs (i.e., they respectively use independent methods or mechanisms for obtaining CORESET0 configuration information). In this case, the network device can broadcast or send two MIBs through the PBCH: MIB1 and MIB2. MIB1 indicates the CORESET0 configuration information of the NR REDCAP terminal devices, and MIB2 indicates the CORESET0 configuration information of the NR legacy terminal devices. That is, the NR REDCAP terminal devices detect or receive the SSBs broadcast by the network device, and synchronize time and frequency with the network device based on the SSBs. Further, the NR REDCAP terminal devices can obtain MIB1 carried by the PBCH, and obtain the CORESET0 configuration information from the preset CORESET#0A time-frequency resource configuration table shown in Table 5 according to the CORESET0 configuration information in MIB1. The NR legacy terminal devices detect or receive the SSBs broadcast by the network device, and synchronize time and frequency with the network device based on the SSBs. Further, the NR legacy terminal devices can obtain MIB2 carried by the PBCH, and obtain the CORESET0 configuration information from the preset CORESET#0 time-frequency resource configuration table shown in Table 6 according to the CORESET0 configuration information in MIB2.

[0128] 503. The terminal device determines a set of PDSCH time-domain resource configurations according to X time-domain symbols of the CORESET0 time-domain resource, and this set of PDSCH time-domain resource configurations is used for PDSCH time-domain resource allocation.

[0129] The terminal device receives the CORESET0 configuration information, and determines the time-domain resource and frequency-domain resource of CORESET0 according to this CORESET0 configuration information. Further, the terminal device can determine a target set of PDSCH time-domain resource configurations from the set of PDSCH time-domain resource configurations according to X time-domain symbols in CORESET0, and determine the PDSCH time-domain resource configuration information according to this target set of PDSCH time-domain resource configurations.

[0130] In one embodiment, the PDSCH time-domain resource configuration set may be either a PDSCH time-domain resource configuration table or a PDSCH time-domain resource matrix. The PDSCH time-domain resource configuration set may be divided into a first PDSCH time-domain resource configuration set and a second PDSCH time-domain resource configuration set. Further, when the number of time-domain symbols included in CORESET0 is less than or equal to 3, the terminal device may determine the first PDSCH time-domain resource configuration set and determine the time-domain resource configuration information of the PDSCH from the first PDSCH time-domain resource configuration set. For example, the first PDSCH time-domain resource configuration set may be specifically referred to the first PDSCH time-domain resource allocation table shown in Table 3 in the foregoing embodiment. When the number of time-domain symbols included in CORESET0 is greater than 3, the terminal device determines the second PDSCH time-domain resource configuration set and determines the time-domain resource configuration information of the PDSCH according to the second PDSCH time-domain resource configuration set. For example, the second PDSCH time-domain resource configuration set may be specifically referred to the second PDSCH time-domain resource allocation table shown in Table 4 in the foregoing embodiment. The PDSCH time-domain resource configuration set includes at least one group of PDSCH time-domain resource allocation information, and each group of PDSCH time-domain resource configuration information in the at least one group of PDSCH time-domain resource allocation information corresponds to row indication information.

[0131] In a possible implementation, the second PDSCH time-domain resource configuration set is predefined or preconfigured; or, the network device sends indication information to the terminal device, and the indication information indicates the configuration information of the second PDSCH time-domain resource configuration set, and the indication information includes one or more of a system information block 1, radio resource control signaling, media access signaling, and downlink control information.

[0132] In a possible implementation, the terminal device may determine the target PDSCH time-domain resource allocation information from the PDSCH time-domain resource set according to the row indication information.

[0133] Exemplarily, if the time domain symbols included in the CORESET0 configured with the CORESET0 configuration information obtained by the terminal device are 5, the second PDSCH time domain resource allocation table shown in Table 4 is determined. If the terminal device obtains that the row indication information is 1, the PDSCH time domain resource allocation information determined by the terminal device from the second PDSCH time domain resource allocation table shown in Table 4 according to the row indication information 1 is: "The position information (also known as dmrs-TypeA-Position) of the demodulation reference signal (DMRS) of PDSCH time domain resource mapping type A is 2 or 3 time domain symbol positions, the mapping type is TypeB, the offset (time slot) K0 between the PDCCH and the PDSCH is 0, the starting symbol of the PDSCH is 4, and the PDSCH time domain length (symbols) is 10".

[0134] In a possible implementation, the terminal device can determine the target PDSCH time domain resource allocation information from the PDSCH time domain resource set according to the row indication information and the position information (i.e., dmrs-TypeA-Position) of the DMRS of the PDSCH time domain resource mapping type A. The target PDSCH time domain resource allocation information includes the mapping type of the PDSCH time domain resource, the starting symbol of the PDSCH time domain, and the PDSCH time domain length. By determining the target PDSCH time domain resource allocation information in this way, one row indication information can correspond to multiple groups of PDSCH time domain resource allocation information, which can support more PDSCH time domain resource configuration combinations than the method of only using the row indication information to indicate the PDSCH time domain resource allocation information.

[0135] Exemplarily, if the time domain symbols included in the CORESET0 configured with the CORESET0 configuration information obtained by the terminal device are 5, the second PDSCH time domain resource allocation table shown in Table 4 is determined. If the terminal device obtains that the row indication information is 2 and dmrs-TypeA-Position is 3, the PDSCH time domain resource allocation information determined by the terminal device from the second PDSCH time domain resource allocation table shown in Table 4 is: "The mapping type is TypeB, the offset (time slot) K0 between the PDCCH and the PDSCH is 0, the starting symbol of the PDSCH is 4, and the PDSCH time domain length (symbols) is 9".

[0136] In a possible implementation, the terminal device can also determine the target PDSCH time domain resource allocation information from the PDSCH time domain resource configuration set according to the idle bits in the MIB or the newly added timing bits in the PBCH, the row indication information, and dmrs-TypeA-Position. By adopting this method, more PDSCH time domain resource configuration combinations can be supported.

[0137] In a possible implementation, the terminal device may determine the target PDSCH time-domain resource configuration information from the PDSCH time-domain resource configuration set according to the time-domain resource allocation indication field in the DCI carried in the PDCCH and / or the position information of the DMRS of the PDSCH time-domain resource classification mapping type A sent by the network device (i.e., dmrs-TypeA-Position). Among them, there is a mapping relationship between the indication status of the time-domain resource allocation indication field in the DCI and the row indication information. For example, when the time-domain resource allocation indication field in the DCI is 001, the corresponding row indication information is mapped to 1.

[0138] In an example, after the terminal device configures the time-domain resource and frequency-domain resource of CORESET0 according to the CORESET0 configuration information, it monitors the DCI from the PDCCH common search space (CSS) set corresponding to CORESET0. Further, the terminal device may obtain the time-domain resource allocation indication field from the DCI, and determine the row indication information according to the indication status of the time-domain resource allocation indication field. Further, according to the row indication information, the PDSCH time-domain resource allocation information is determined from the PDSCH time-domain resource set.

[0139] In another example, after the terminal device configures the time-domain resource and frequency-domain resource of CORESET0 according to the CORESET0 configuration information, it monitors the DCI from the PDCCH-CSS set corresponding to CORESET0. Further, the terminal device may obtain the time-domain resource allocation indication field from the DCI, obtain the dmrs-TypeA-Position from the MIB, and obtain the row indication information according to the indication status of the time-domain resource allocation indication field in the DCI. Further, the terminal device may determine the target PDSCH time-domain resource allocation information from the PDSCH time-domain resource configuration set according to the row indication information and the dmrs-TypeA-Position.

[0140] In a possible implementation, the terminal device may obtain the dmrs-TypeA-Position through any one of the signaling in the MIB, SIB1, radio resource control (RRC), media access control control element (MAC CE), or DCI.

[0141] 504. The terminal device determines the frequency-domain resource of the downlink initial bandwidth part (BWP) according to the frequency-domain resource of CORESET0.

[0142] The terminal device determines the downlink initial bandwidth part (DL initial BWP) according to the frequency-domain resources of CORESET0. Exemplarily, the time-frequency resources used by the NR REDCAP terminal device and the NR legacy terminal device during the NR initial access process are as Figure 6 shown. For the convenience of distinction and description, the DL initial BWP determined by the NR REDCAP terminal device according to the frequency-domain resources of CORESET0 is called the downlink initial bandwidth part #0A, and the DL initial BWP determined by the NR legacy terminal device according to the frequency-domain resources of CORESET0 is called the downlink initial bandwidth part #0.

[0143] 505. The network device and the terminal device communicate using the resources configured with the CORESET0 configuration information.

[0144] Among them, the resources configured with the CORESET0 configuration information may include the time-domain resources and frequency-domain resources of CORESET0, and may also include the time-domain resources of the PDSCH determined in the foregoing step 503 and the frequency-domain resources determined in the foregoing step 504.

[0145] The terminal device configures the time-domain resources and frequency-domain resources of CORESET0 according to the CORESET0 configuration information, determines the time-domain allocation information of the PDSCH according to the X time-domain symbols included in the time-domain resources of the CORESET0, and then the network device can determine the PDSCH time-domain resources through the time-domain allocation information of the PDSCH, and transmit the system information block 1 (SIB1) to the terminal device according to the PDSCH time-domain resources.

[0146] In an application scenario, the time-frequency resource utilization efficiency can be improved by repeating multiple CORESETs to increase the time-domain resources (time-domain symbols) occupied by the CORESET in the time domain. In this case, the terminal device can determine the PDSCH time-domain resource allocation set according to the total number of time-domain symbols of the CORESET repetition, and the PDSCH time-domain resource allocation set is used for PDSCH time-domain resource allocation.

[0147] Exemplarily, such as Figure 7As shown, there is a case of CORESET duplication. The time domain resources of each CORESET include 3 time domain symbols. Then, the time domain resources of the duplicated CORESET include 6 time domain symbols, that is, the total number of time domain symbols of the duplicated CORESET is 6. Further, since 6 is greater than 3, the terminal device can determine that the second PDSCH time domain resource configuration set is the target PDSCH time domain resource configuration set. For example, reference can be made to the second PDSCH time domain resource allocation table shown in Table 4 in the foregoing embodiment, so as to determine the PDSCH time domain resource allocation information according to the second PDSCH time domain resource configuration set.

[0148] In an application scenario, the PDSCH time domain resource configuration set provided in the embodiments of the present application can be used for the scheduling transmission of SIB1, and can also be used for the transmission of system information (SI), paging, msg2 / msgB / msg4 in the random access process, and the PDSCH transmission scheduled by DCI scrambled with cell-radio network temporary identification (C-RNTI) or configured scheduled-radio network temporary identification (CS-RNTI) or modulation and coding scheme-cell-radio network temporary identification (MCS-C-RNTI) in any search space (Common Search Space, CSS) associated with CORESET #0A, and the PDSCH transmission scheduled by DCI scrambled with C-RNTI / CS-RNTI / MCS-C-RNTI in any CSS not associated with CORESET #0A or in a UE-specific search space (USS).

[0149] It can be seen that by implementing Figure 5For the described method for enhancing the physical downlink control channel, the terminal device can configure the time-domain resources and frequency-domain resources of CORESET0 according to the CORESET0 configuration information sent by the network device. The number of time-domain symbols included in the time-domain resources of CORESET0 can be greater than 3. In other words, the terminal device can increase the number of time-domain symbols of CORESET0 to provide more control channel units, thereby enhancing the transmission performance of the physical downlink control channel. Moreover, the terminal device can determine the time-domain resource configuration information of the physical downlink shared channel according to the number of time-domain symbols of CORESET0, and further ensure the flexibility of the time-domain resource allocation of the physical downlink shared channel, so as to ensure the transmission performance of SIB1.

[0150] It should be noted that in specific implementation, some steps in the accompanying drawings can be selected for implementation, and the order of the steps in the drawings can also be adjusted for implementation. This application does not make any limitations in this regard. It should be understood that implementing some steps in the drawings or adjusting the order of the steps for specific implementation both fall within the protection scope of this application.

[0151] Please refer to Figure 8 , Figure 8 which shows a schematic structural diagram of a communication device according to an embodiment of the present application. Figure 8 The shown communication device can be used to implement some or all of the functions of the terminal device in the corresponding embodiment of the above-mentioned method for enhancing the physical downlink control channel. Figure 8 The shown communication device can be used to implement the above-mentioned Figure 3 or Figure 5 some or all of the functions of the terminal device in the described method embodiment. The device can be a terminal device, or a device in the terminal device, or a device that can be used in combination with the terminal device. Among them, the communication device can also be a chip system. Figure 8 The shown communication device can include a transmission module 801 and a processing module 802. Among them:

[0152] The transmission module 801 is used for the terminal device to obtain control resource set (CORESET) configuration information, and the CORESET configuration information is used to configure the time-domain resources and frequency-domain resources of CORESET. The time-domain resources include X time-domain symbols, and the X time-domain symbols are continuous in the time domain. X is an integer greater than or equal to 1 and less than or equal to M, and M is an integer greater than or equal to 4;

[0153] The processing module 802 is used for the terminal device to determine the time-domain resource configuration set of the physical downlink shared channel (PDSCH) according to the X time-domain symbols, and the PDSCH time-domain resource configuration set is used for PDSCH time-domain resource allocation.

[0154] In a possible implementation, the set of time-domain resource configurations of the Physical Downlink Shared Channel (PDSCH) is either the PDSCH time-domain resource configuration table or the PDSCH time-domain resource matrix.

[0155] In a possible implementation, when the X time-domain symbols are less than or equal to 3, the processing module 802 is further configured to determine a first set of PDSCH time-domain resource configurations, where the first set of PDSCH time-domain resource configurations includes the mapping types of PDSCH time-domain resources, and the mapping types include mapping type A and mapping type B.

[0156] In a possible implementation, when the X time-domain symbols are greater than 3, the processing module 802 is further configured to determine a second set of PDSCH time-domain resource configurations, where the second set of PDSCH time-domain resource configurations includes at least one group of PDSCH time-domain resource allocation information, and the PDSCH time-domain resource allocation information includes the mapping type of PDSCH time-domain resources, the starting symbol of the PDSCH time domain, and the length of the PDSCH time domain. Each group of PDSCH time-domain resource configuration information in the at least one group of PDSCH time-domain resource allocation information corresponds to row indication information.

[0157] In a possible implementation, the processing module 802 is further configured to determine target PDSCH time-domain resource allocation information from the second set of PDSCH time-domain resource configurations according to the row indication information.

[0158] In a possible implementation, the processing module 802 is further configured to determine target PDSCH time-domain resource allocation information from the second set of PDSCH time-domain resource configurations according to the row indication information and the position information of the Demodulation Reference Signal (DMRS) of PDSCH time-domain resource mapping type A. The target PDSCH time-domain resource allocation information includes the mapping type of PDSCH time-domain resources, the starting symbol of the PDSCH time domain, and the length of the PDSCH time domain.

[0159] In a possible implementation, the processing module 802 is specifically configured to determine target PDSCH time-domain resource configuration information from the second set of PDSCH time-domain resource configurations according to the time-domain resource allocation indication field in the Downlink Control Information (DCI) carried in the Physical Downlink Control Channel (PDCCH) and / or the position information of the DMRS of PDSCH time-domain resource classification mapping type A sent by the network device. There is a mapping relationship between the indication status of the time-domain resource allocation indication field in the DCI and the row indication information.

[0160] In a possible implementation, the CORESET configuration information is CORESET0 configuration information, and the processing module 802 is further configured to determine the frequency-domain resources of the downlink initial Bandwidth Part (BWP) according to the frequency-domain resources of CORESET0.

[0161] In the embodiments provided in the present application above, the methods provided in the embodiments of the present application are introduced from the perspectives of network devices, terminal devices, and the interaction between network devices and terminal devices respectively. To implement the various functions in the methods provided in the embodiments of the present application above, network devices and terminal devices may include a hardware structure and / or software modules, and implement the various functions above in the form of a hardware structure, software module, or a combination of a hardware structure and a software module. Whether a certain function among the various functions above is executed in the form of a hardware structure, software module, or a combination of a hardware structure and a software module depends on the specific application and design constraints of the technical solution.

[0162] Figure 8 and Figure 9 FIG. is a schematic structural diagram of a possible communication device provided for an embodiment of the present application. These communication devices can implement the functions of the terminal device or network device in the above method embodiments, and thus can also achieve the beneficial effects possessed by the above method embodiments. In the embodiments of the present application, the communication device may be a terminal device as shown in Figure 3 and Figure 5 or a network device as shown in Figure 3 and Figure 5 , or may also be a module (such as a chip) applied to a terminal device or a network device.

[0163] As Figure 8 shown, the communication device 800 includes a transmission module 801, a processing module 802, and a storage module 803. The communication device 800 can be used to implement the functions of the terminal device or network device in the above method embodiments shown in Figure 3 or Figure 5 .

[0164] When the communication device 800 is used to implement the functions of the terminal device in the method embodiment described in Figure 3 : The transmission module 801 is used to obtain control resource set (CORESET) configuration information, and the CORESET configuration information is used to configure the time-domain resources and frequency-domain resources of the CORESET. The time-domain resources include X time-domain symbols, and the X time-domain symbols are continuous in the time domain. X is an integer greater than or equal to 1 and less than or equal to M, and M is an integer greater than or equal to 4; the processing module 802 is used to determine a physical downlink shared channel (PDSCH) time-domain resource configuration set according to the X time-domain symbols, and the PDSCH time-domain resource configuration set is used for PDSCH time-domain resource allocation.

[0165] When the communication device 800 is used to implement the Figure 3When the network device in the method embodiment implements its functions: A storage module 803 is configured to store programs and instructions. A transmission module 801 is configured to send control resource set (CORESET) configuration information, where the CORESET configuration information is used to configure the time-domain resources and frequency-domain resources of the CORESET. The time-domain resources include X time-domain symbols, and the X time-domain symbols are continuous in the time domain. X is an integer greater than or equal to 1 and less than or equal to M, and M is an integer greater than or equal to 4; the transmission module 801 is further configured to communicate with the terminal device using the resources configured with the CORESET configuration information.

[0166] When the communication device 800 is used to implement Figure 5 When the communication device 800 is used to implement the functions of the terminal device in the method embodiment: A transmission module 801 is configured to enable the terminal device to obtain CORESET0 configuration information, where the CORESET0 configuration information is used to configure the time-domain resources and frequency-domain resources of the CORESET0. The time-domain resources include X time-domain symbols, and the X time-domain symbols are continuous in the time domain. X is an integer greater than or equal to 1 and less than or equal to M, and M is an integer greater than or equal to 4; A processing module 802 is configured to determine a PDSCH time-domain resource configuration set according to the X time-domain symbols of the CORESET0 time-domain resources, where the PDSCH time-domain resource configuration set is used for PDSCH time-domain resource allocation; the processing module 802 is configured to enable the terminal device to determine the frequency-domain resources of the downlink initial bandwidth part (BWP) according to the frequency-domain resources of the CORESET0.

[0167] When the communication device 800 is used to implement Figure 5 When the network device in the method embodiment implements its functions: A storage module 803 is configured to store programs and instructions. A transmission module 801 is configured to send CORESET0 configuration information, where the CORESET0 configuration information is used to configure the time-domain resources and frequency-domain resources of the CORESET0. The time-domain resources include X time-domain symbols, and the X time-domain symbols are continuous in the time domain. X is an integer greater than or equal to 1 and less than or equal to M, and M is an integer greater than or equal to 4; the transmission module 801 is further configured to communicate with the terminal device using the resources configured with the CORESET0 configuration information.

[0168] For a more detailed description of the above transmission module 801, processing module 802, and storage module 803, reference may be made to the relevant descriptions in the above method embodiments, which will not be elaborated herein.

[0169] As Figure 9As shown in the figure, the communication device 900 includes a processor 910 and an interface circuit 920. The processor 910 and the interface circuit 920 are coupled to each other. It can be understood that the interface circuit 920 can be a transceiver or an input / output interface. Optionally, the communication device 900 may further include a memory 930 for storing instructions executed by the processor 910, or input data required for the processor 910 to execute instructions, or data generated after the processor 910 executes instructions.

[0170] When the communication device 900 is used to implement the method in the above method embodiment, the processor 910 is used to execute the functions of the above processing module 802, the interface circuit 920 is used to execute the functions of the above transmission module 801, and the memory 930 is used to execute the functions of the above storage module 803.

[0171] When the above communication device is a chip applied to a terminal device, the terminal device chip implements the functions of the terminal device in the above method embodiment. The terminal device chip receives information from other modules (such as a radio frequency module or an antenna) in the terminal device, and the information is sent by a network device to the terminal device; or, the terminal device chip sends information to other modules (such as a radio frequency module or an antenna) in the terminal device, and the information is sent by the terminal device to the network device.

[0172] When the above communication device is a chip applied to a network device, the network device chip implements the functions of the network device in the above method embodiment. The network device chip receives information from other modules (such as a radio frequency module or an antenna) in the network device, and the information is sent by a terminal device to the network device; or, the network device chip sends information to other modules (such as a radio frequency module or an antenna) in the network device, and the information is sent by the network device to the terminal device.

[0173] It can be understood that the processor in the embodiments of the present application may be a central processing unit (CPU), or may be other general-purpose processors, digital signal processors (DSPs), application specific integrated circuits (ASICs), field programmable gate arrays (FPGAs), or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. The general-purpose processor may be a microprocessor or any conventional processor.

[0174] The method steps in the embodiments of the present application can be implemented in a hardware manner or by a processor executing software instructions. The software instructions can be composed of corresponding software modules, and the software modules can be stored in a random access memory (RAM), flash memory, read-only memory (ROM), programmable ROM (PROM), erasable PROM (EPROM), electrically erasable PROM (EEPROM), registers, hard disks, removable hard disks, CD-ROMs, or any other form of storage medium well-known in the art. An exemplary storage medium is coupled to the processor so that the processor can read information from the storage medium and write information to the storage medium. Of course, the storage medium can also be a component of the processor. The processor and the storage medium can be located in an ASIC. In addition, the ASIC can be located in an access network device or a terminal device. Of course, the processor and the storage medium can also exist as discrete components in the access network device or the terminal device.

[0175] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer programs or instructions. When the computer program or instructions are loaded and executed on a computer, the processes or functions described in the embodiments of the present application are executed in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer program or instructions can be stored in a computer-readable storage medium or transmitted through the computer-readable storage medium. The computer-readable storage medium can be any available medium that the computer can access or a data storage device such as a server integrating one or more available media. The available medium can be a magnetic medium, such as a floppy disk, a hard disk, or a magnetic tape; it can also be an optical medium, such as a DVD; or it can be a semiconductor medium, such as a solid state disk (SSD).

[0176] In various embodiments of the present application, if there is no special description and logical conflict, the terms and / or descriptions between different embodiments are consistent and can be cross-referenced. The technical features in different embodiments can be combined to form new embodiments according to their internal logical relationships.

[0177] In this application, "at least one" means one or more, and "a plurality" means two or more. "And / or" describes the association relationship of associated objects and indicates that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone, where A and B can be singular or plural. In the textual description of this application, the character " / " generally represents an "or" relationship between the associated objects before and after; in the formulas of this application, the character " / " represents a "division" relationship between the associated objects before and after.

[0178] It can be understood that the various numerical numbers involved in the embodiments of this application are only for the convenience of description and are not used to limit the scope of the embodiments of this application. The magnitudes of the sequence numbers of the above processes do not mean the sequence of execution, and the execution sequence of each process should be determined by its function and internal logic.

[0179] The embodiments of this application also provide a computer-readable storage medium, in which computer-executable instructions are stored. When the computer-executable instructions are executed, the methods executed by the terminal device in the above method embodiments are implemented.

[0180] The embodiments of this application also provide a computer-readable storage medium, in which computer-executable instructions are stored. When the computer-executable instructions are executed, the methods executed by the network device in the above method embodiments are implemented.

[0181] The embodiments of this application also provide a computer program product, which includes a computer program. When the computer program is executed, the methods executed by the terminal device in the above method embodiments are implemented.

[0182] The embodiments of this application also provide a computer program product, which includes a computer program. When the computer program is executed, the methods executed by the network device in the above method embodiments are implemented.

[0183] The embodiments of this application also provide a communication system, which includes a terminal device or a network device. Among them, the terminal device is used to execute the methods executed by the terminal device in the above method embodiments. The network device is used to execute the methods executed by the network device in the above method embodiments.

[0184] It should be noted that, for the foregoing method embodiments, for the sake of simple description, they are all expressed as a series of action combinations. However, those skilled in the art should know that this application is not limited by the described action sequence, because according to this application, some steps can be performed in other sequences or simultaneously. Secondly, those skilled in the art should also know that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily essential to this application.

[0185] The descriptions of the embodiments provided in this application can be referred to each other. Each embodiment description has its own emphasis. For the parts not detailed in a certain embodiment, reference can be made to the relevant descriptions of other embodiments. For the convenience and brevity of description, for example, the functions and steps performed by the various devices and equipment provided in the embodiments of this application can refer to the relevant descriptions of the method embodiments of this application. The method embodiments can also refer to, combine or quote each other among the device embodiments.

[0186] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of this application, not to limit them; although this application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A method for enhancing the physical downlink control channel, characterized in that The method includes: The terminal device obtains the control resource set (CORESET) configuration information, where the CORESET configuration information is used to configure the time-domain resources and frequency-domain resources of the CORESET. The time-domain resources include X time-domain symbols, the X time-domain symbols are continuous in the time domain, X is an integer greater than or equal to 1 and less than or equal to M, and M is an integer greater than or equal to 4; The terminal device determines a physical downlink shared channel (PDSCH) time-domain resource configuration set according to the X time-domain symbols. The PDSCH time-domain resource configuration set is used for PDSCH time-domain resource allocation. Among them, the terminal device determines the PDSCH time-domain resource configuration set according to the X time-domain symbols, including: when the X time-domain symbols are greater than 3, determining a second PDSCH time-domain resource configuration set. The second PDSCH time-domain resource configuration set includes at least one group of PDSCH time-domain resource allocation information. The PDSCH time-domain resource allocation information includes the mapping type of the PDSCH time-domain resource, the starting symbol of the PDSCH time-domain, and the length of the PDSCH time-domain. Each group of PDSCH time-domain resource configuration information in the at least one group of PDSCH time-domain resource allocation information corresponds to row indication information.

2. The method according to claim 1, wherein The PDSCH time-domain resource configuration set is any one of a PDSCH time-domain resource configuration table and a PDSCH time-domain resource matrix.

3. The method according to claim 1, wherein The terminal device determines a PDSCH time-domain resource configuration set according to the X time-domain symbols, including: When the X time-domain symbols are less than or equal to 3, the terminal device determines a first PDSCH time-domain resource configuration set. The first PDSCH time-domain resource configuration set includes the mapping type of the PDSCH time-domain resource, and the mapping type includes mapping type A and mapping type B.

4. The method according to claim 1, wherein The method further includes: The terminal device determines target PDSCH time-domain resource allocation information from the second PDSCH time-domain resource configuration set according to the row indication information.

5. The method according to claim 1, characterized in that The method further includes: The terminal device determines target PDSCH time-domain resource allocation information from the second PDSCH time-domain resource configuration set according to the row indication information and the position information of the demodulation reference signal (DMRS) of the PDSCH time-domain resource mapping type A. The target PDSCH time-domain resource allocation information includes the mapping type of the PDSCH time-domain resource, the starting symbol of the PDSCH time-domain, and the length of the PDSCH time-domain.

6. The method according to any one of claims 1-5, characterized in that, The method further includes: The terminal device determines target PDSCH time-domain resource configuration information from the second PDSCH time-domain resource configuration set according to the time-domain resource allocation indication field in the downlink control information (DCI) carried in the physical downlink control channel (PDCCH) and / or the position information of the DMRS of the PDSCH time-domain resource classification mapping type A sent by the network device. There is a mapping relationship between the indication status of the time-domain resource allocation indication field in the DCI and the row indication information.

7. The method according to any one of claims 1-5, characterized in that, The CORESET configuration information is CORESET0 configuration information, and the method further includes: The terminal device determines the frequency-domain resource of the downlink initial bandwidth part BWP according to the frequency-domain resource of the CORESET0.

8. The method according to any one of claims 1-5, characterized in that The terminal device obtains control resource set CORESET configuration information, including: The terminal device receives, through a physical broadcast channel PBCH, a master information block MIB from a network device, where the MIB includes configuration information of system information block 1, and the configuration information of the system information block 1 indicates the control resource set CORESET configuration information; or, The terminal device receives, through a physical broadcast channel PBCH, the MIB from the network device, and the spare bits in the MIB indicate the control resource set CORESET configuration information; or, The terminal device receives, through PBCH, additional timing bits from the network device, and the additional timing bits indicate the control resource set CORESET configuration information; or, The terminal device receives, through PBCH, the MIB and additional timing bits from the network device, and the MIB and the additional timing bits indicate the control resource set CORESET configuration information; Or, the terminal device receives indication information from the network device, where the indication information indicates the control resource set CORESET configuration information, and the indication information includes one or more of system information block 1, radio resource control signaling, media access signaling, and downlink control information.

9. A method for enhancing the physical downlink control channel, characterized in that The method includes: The network device sends control resource set CORESET configuration information to the terminal device. The CORESET configuration information is used to configure the time-domain resource and frequency-domain resource of the CORESET. The time-domain resource includes X time-domain symbols, and the X time-domain symbols are continuous in the time domain. X is an integer greater than or equal to 1 and less than or equal to M, and M is an integer greater than or equal to 4; The network device and the terminal device communicate using the resources configured with the CORESET configuration information. Among them, the X time-domain symbols are used to determine the physical downlink shared channel PDSCH time-domain resource configuration set, and the PDSCH time-domain resource configuration set is used for PDSCH time-domain resource allocation. The X time-domain symbols are used to determine the physical downlink shared channel PDSCH time-domain resource configuration set, including: when the X time-domain symbols are greater than 3, the PDSCH time-domain resource configuration set is the second PDSCH time-domain resource configuration set, and the second PDSCH time-domain resource configuration set includes at least one group of PDSCH time-domain resource allocation information. The PDSCH time-domain resource allocation information includes the mapping type of the PDSCH time-domain resource, the starting symbol of the PDSCH time-domain, and the length of the PDSCH time-domain. Each group of PDSCH time-domain resource configuration information in the at least one group of PDSCH time-domain resource allocation information corresponds to row indication information.

10. The method according to claim 9, wherein The network device sends control resource set CORESET configuration information to the terminal device, including: The network device sends a master information block (MIB) to the terminal device through a physical broadcast channel (PBCH). The MIB includes configuration information of system information block 1, and the configuration information of system information block 1 indicates control resource set (CORESET) configuration information; or, The MIB sent by the network device to the terminal device through the PBCH, and the spare bits in the MIB indicate CORESET configuration information; or, The network device sends newly added timing bits to the terminal device through the PBCH, and the newly added timing bits indicate CORESET configuration information; or, The network device sends the MIB and the newly added timing bits to the terminal device through the PBCH, and the MIB and the newly added timing bits indicate CORESET configuration information; or, The network device sends indication information to the terminal device, and the indication information indicates CORESET configuration information. The indication information includes one or more of system information block 1, radio resource control signaling, media access signaling, and downlink control information.

11. A communication device, characterized in that, Including: A transmission module, configured to obtain CORESET configuration information, where the CORESET configuration information is used to configure the time-domain resources and frequency-domain resources of the CORESET. The time-domain resources include X time-domain symbols, and the X time-domain symbols are continuous in the time domain. X is an integer greater than or equal to 1 and less than or equal to M, and M is an integer greater than or equal to 4; A processing module, configured to determine a physical downlink shared channel (PDSCH) time-domain resource configuration set according to the X time-domain symbols. The PDSCH time-domain resource configuration set is used for PDSCH time-domain resource allocation. Determining the PDSCH time-domain resource configuration set according to the X time-domain symbols includes: when the X time-domain symbols are greater than 3, determining a second PDSCH time-domain resource configuration set. The second PDSCH time-domain resource configuration set includes at least one group of PDSCH time-domain resource allocation information. The PDSCH time-domain resource allocation information includes the mapping type of the PDSCH time-domain resource, the starting symbol of the PDSCH time-domain, and the length of the PDSCH time-domain. Each group of PDSCH time-domain configuration information in the at least one group of PDSCH time-domain resource allocation information corresponds to row indication information.

12. The device according to claim 11, wherein The PDSCH time-domain resource configuration set is any one of a PDSCH time-domain resource configuration table and a PDSCH time-domain resource matrix.

13. The device according to claim 11, wherein The processing module is specifically configured to: When the X time-domain symbols are less than or equal to 3, determine a first PDSCH time-domain resource configuration set. The first PDSCH time-domain resource configuration set includes the mapping type of the PDSCH time-domain resource, and the mapping type includes mapping type A and mapping type B.

14. The device according to claim 11, wherein, The processing module is further configured to determine target PDSCH time-domain resource allocation information from the second PDSCH time-domain resource configuration set according to the row indication information.

15. The device according to claim 11, wherein The processing module is further configured to determine target PDSCH time-domain resource allocation information from the second PDSCH time-domain resource configuration set according to the row indication information and the position information of the demodulation reference signal DMRS of the PDSCH time-domain resource mapping type A. The target PDSCH time-domain resource allocation information includes the mapping type of the PDSCH time-domain resource, the starting symbol of the PDSCH time-domain, and the length of the PDSCH time-domain.

16. The device according to any one of claims 11 - 15, characterized in that, Specifically, the processing module is configured to determine target PDSCH time-domain resource configuration information from the second PDSCH time-domain resource configuration set according to the time-domain resource allocation indication field in the downlink control information DCI carried in the PDCCH and / or the position information of the DMRS of the PDSCH time-domain resource classification mapping type A sent by the network device. There is a mapping relationship between the indication status of the time-domain resource allocation indication field in the DCI and the row indication information.

17. The device according to any one of claims 11-15, characterized in that, The processing module is further configured to, when the CORESET configuration information is CORESET0 configuration information, determine the frequency-domain resource of the downlink initial bandwidth part BWP according to the frequency-domain resource of the CORESET0.

18. The device according to any one of claims 11-15, characterized in that, The transmission module is specifically configured to: Receive, through the physical broadcast channel PBCH, the master information block MIB from the network device. The MIB includes the configuration information of the system information block 1, and the configuration information of the system information block 1 indicates the CORESET configuration information; or, Receive, through the physical broadcast channel PBCH, the MIB from the network device. The spare bits in the MIB indicate the CORESET configuration information; or, Receive, through the PBCH, the newly added timing bits from the network device. The newly added timing bits indicate the CORESET configuration information; or, Receive, through the PBCH, the MIB and the newly added timing bits from the network device. The MIB and the newly added timing bits indicate the CORESET configuration information; Or, Receive the indication information from the network device. The indication information indicates the CORESET configuration information, and the indication information includes one or more of the system information block 1, the radio resource control signaling, the media access signaling, and the downlink control information.

19. A communication device, characterized in that, It includes a storage module and a transmission module, where The storage module is used to store programs and instructions; The transmission module is used to send the CORESET configuration information, which is used to configure the time-domain resource and the frequency-domain resource of the CORESET. The time-domain resource includes X time-domain symbols, and the X time-domain symbols are continuous in the time domain. X is an integer greater than or equal to 1 and less than or equal to M, and M is an integer greater than or equal to 4; The transmission module is used to communicate with a terminal device using resources configured with the CORESET configuration information. Among them, the X time-domain symbols are used to determine a physical downlink shared channel (PDSCH) time-domain resource configuration set, and the PDSCH time-domain resource configuration set is used for PDSCH time-domain resource allocation. The X time-domain symbols being used to determine the PDSCH time-domain resource configuration set includes: when the X time-domain symbols are greater than 3, the PDSCH time-domain resource configuration set is a second PDSCH time-domain resource configuration set, and the second PDSCH time-domain resource configuration set includes at least one set of PDSCH time-domain resource allocation information. The PDSCH time-domain resource allocation information includes the mapping type of the PDSCH time-domain resource, the starting symbol of the PDSCH time-domain, and the PDSCH time-domain length. Each set of PDSCH time-domain resource configuration information in the at least one set of PDSCH time-domain resource allocation information corresponds to row indication information.

20. The device according to claim 19, wherein, Specifically, the transmission module is used for: Sending a master information block (MIB) to the terminal device through a physical broadcast channel (PBCH). The MIB includes configuration information of system information block 1, and the configuration information of system information block 1 indicates the CORESET configuration information; or, The MIB sent to the terminal device through the PBCH, where the idle bits in the MIB indicate the CORESET configuration information; or, Sending newly added timing bits to the terminal device through the PBCH, and the newly added timing bits indicate the CORESET configuration information; or, Sending the MIB and the newly added timing bits to the terminal device through the PBCH, and the MIB and the newly added timing bits indicate the CORESET configuration information; or, Sending indication information to the terminal device, and the indication information indicates the CORESET configuration information. The indication information includes one or more of system information block 1, radio resource control signaling, media access signaling, and downlink control information.

21. A communication device, characterized in that, It includes a processor and an interface circuit. The interface circuit is used to receive signals from other communication devices outside the communication device and transmit them to the processor or send signals from the processor to other communication devices outside the communication device. The processor is used to implement the method according to any one of claims 1-8 or 9-10 through logic circuits or by executing code instructions.

22. A computer-readable storage medium, characterized in that, A computer program or instruction is stored in the storage medium. When the computer program or instruction is executed by the communication device, the method according to any one of claims 1-8 or 9-10 is implemented.

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