CN111726311B

CN111726311B - Data channel transmission method and device

Info

Publication number: CN111726311B
Application number: CN201910205525.1A
Authority: CN
Inventors: 刘哲; 董朋朋; 彭金磷
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2019-03-18
Filing date: 2019-03-18
Publication date: 2021-10-22
Anticipated expiration: 2039-03-18
Also published as: CN111726311A; WO2020187132A1

Abstract

The application provides a transmission method of a data channel, which comprises the following steps: the terminal receives the PDSCH by using the first SCS; wherein PDSCH is in 2ⁿRepeatedly transmitted on the first OFDM symbol, 2ⁿAligning a first OFDM symbol and a second OFDM symbol in time domain, wherein the first OFDM symbol and the second OFDM symbol are used for transmitting a reference signal corresponding to a second SCS, and the first SCS is 2 of the second SCSⁿMultiple, where n is a positive integer. Under the scenario of co-frequency band deployment of two communication networks supporting different SCS, the technical solution provided by the embodiment of the present application may be used to reduce mutual interference between the PDSCH corresponding to the first SCS and the reference signal corresponding to the second SCS.

Description

Data channel transmission method and device

Technical Field

The present application relates to the field of communications technologies, and in particular, to a method and an apparatus for transmitting a data channel.

Background

In a wireless communication system, in order to fully utilize air interface resources (e.g., time domain resources, frequency domain resources, and/or code resources), communication networks of different standards are allowed to share the same air interface resources. For example, to fully utilize frequency domain resources, a fifth generation (5G) communication network and a Long Term Evolution (LTE) communication network may share the same frequency domain resources, i.e., a 5G system and an LTE system may be deployed on the same frequency domain resources. When the 5G system and the LTE system share frequency domain resources, how to reduce interference between the 5G system and the LTE system is a topic to be researched intensively.

Disclosure of Invention

The embodiment of the application provides a transmission method and a transmission device of a data channel, which are used for reducing mutual interference between two signals supporting different subcarrier spacing (SCS).

In a first aspect, a method for transmitting a data channel is provided, including: receiving a first signal using a first SCS; wherein the first signal is at 2ⁿRepeated transmission on a first Orthogonal Frequency Division Multiplexing (OFDM) symbol, the 2ⁿAligning a first OFDM symbol and1 second OFDM symbol in time domain, wherein the 1 second OFDM symbol is used for transmitting a second SCS corresponding to the first OFDM symbolSaid first SCS is 2 of said second SCSⁿMultiple, where n is a positive integer. Based on this technical solution, for the first signal, repeating the first signal in the time domain is equivalent to interpolating 0 in the frequency domain for the first signal. First signal corresponding to first SCS at 2ⁿIs repeatedly transmitted on the first OFDM symbol, and thus, for 2ⁿThe first signal is equal to 0 in a portion of the subcarriers corresponding to the second SCS on a second OFDM symbol corresponding to the first OFDM symbol, so that the first signal does not affect the second signal carried in the portion of the subcarriers corresponding to the second SCS. Thus, the mutual interference between the first signal corresponding to the first SCS and the second signal corresponding to the second SCS can be reduced.

In one possible design, the first signal is at 2ⁿThe first OFDM symbol is repeatedly transmitted, and comprises: in the shared frequency domain resource, the first signal is at 2ⁿThe transmission is repeated on the first OFDM symbol. Optionally, in the non-shared frequency domain resource, the first signal is at 2ⁿThe first OFDM symbol is transmitted independently.

In one possible design, the first signal includes data carried on a Physical Downlink Shared Channel (PDSCH), and the second signal includes a reference signal; or the first signal includes data carried on a Physical Downlink Control Channel (PDCCH), and the second signal includes a reference signal; or the first signal comprises data carried on the PDSCH, and the second signal comprises a reference signal and data carried on the PDCCH; or the first signal comprises data carried on the PDCCH and data carried on the PDSCH, and the second signal comprises a reference signal; or the first signal includes data carried on the PDCCH and data carried on the PDSCH, and the second signal includes a reference signal and data carried on the PDCCH. Optionally, the reference signal comprises a Cell Reference Signal (CRS).

In one possible design: for said 2ⁿA first OFDM symbol, when n is 1, a first OFDM symbol of the two first OFDM symbols comprisesA cyclic prefix and the second first OFDM symbol comprises a cyclic suffix. By the method, repeated transmission of the first signal on the two first OFDM symbols can be simply realized, and the complexity of system design is simplified.

In one possible design, 2ⁿThe first signal transmitted on the ith first OFDM symbol in the first OFDM symbols is obtained after the phase rotation processing of the corresponding frequency domain signal, i is more than 1 and less than or equal to 2ⁿIs an integer of (1). Through the method, the traditional signal receiving algorithm can be compatible, and a new receiving algorithm does not need to be additionally designed, so that the system design can be simplified.

In one possible design, receiving a first signal includes: in said 2ⁿThe first signal is received on a first one of the first OFDM symbols. Therefore, the process of receiving the first signal can be simplified, and the complexity is reduced.

In one possible design, in said 2ⁿOn a first OFDM symbol, RE in a first RE set is not used for mapping the first signal, and the first RE set and a second RE set have an overlapping part in a frequency domain;

the 1 second OFDM symbol is used for transmitting a second signal corresponding to the second SCS, and includes: in the 1 second OFDM symbol, the REs in the second RE set are used for mapping a second signal corresponding to the second SCS. By this method, rate matching can be performed for the second signal of the second SCS, so that interference between the first signal and the second signal can be reduced.

In one possible design, the subcarrier number of one RE in the first RE set is 2ⁿIs equal to the subcarrier number of one RE in the second set of REs. By the method, the available resource of the first signal can be increased, so that the data transmission rate of the system can be improved.

In one possible design, the method further includes: receiving resource configuration information, wherein the resource configuration information is used for indicating the position of the second OFDM symbol. Thus, according to the resource configuration information, the position of the second OFDM symbol can be determined, thereby determining 2ⁿThe position of the first OFDM symbol in order to correctly receive the PDSCH. Optionally, the resource configuration information is further used for determining frequency domain positions of REs in the second RE set. According to the method, because the first RE set and the second RE set have the overlapping part on the frequency domain, the positions of the REs in the second RE set are determined according to the resource configuration information, and then the positions of the REs in the first RE set can be determined, so that the PDSCH can be received correctly. Optionally, the method further comprises: and determining the position of the second OFDM symbol according to the resource configuration information.

In one possible design, the method further includes: resource configuration information is received, the resource configuration information being used to determine resource locations of REs in the second set of REs. For example, the resource configuration information is used to determine a time domain position (e.g., a symbol position) and a frequency domain position (e.g., a subcarrier position) of each RE in the second RE set. Optionally, the method further comprises: and determining the positions of the REs in the second RE set according to the resource configuration information.

In one possible design, the method further includes: scheduling information of the first signal is received, the scheduling information being used for indicating a coding mechanism of the PDSCH, and a code rate indicated by the coding mechanism being smaller than a first threshold. It can be understood that the code rate of the PDSCH is less than the first threshold, which can improve the correct transmission rate of the PDSCH.

In a second aspect, a method for transmitting a data channel is provided, including: transmitting a first signal using a first SCS; wherein the first signal is at 2ⁿIs repeatedly transmitted on the first OFDM symbol, 2ⁿAligning a first OFDM symbol and a second OFDM symbol in time domain, wherein the first OFDM symbol and the second OFDM symbol are used for transmitting a second signal corresponding to a second SCS, and the first SCS is 2 of the second SCSⁿMultiple, where n is a positive integer.

In one possible design, the method further includes: and sending resource configuration information, wherein the resource configuration information is used for indicating the position of the second OFDM symbol.

In one possible design, the method further includes: and sending scheduling information of the first signal, wherein the scheduling information is used for indicating an encoding mechanism of the first signal, and a code rate indicated by the encoding mechanism is smaller than a first threshold value.

For the related introduction of the first signal, the second signal and the resource allocation information, please refer to the first aspect, which is not described herein again.

In a third aspect, a method for transmitting a data channel is provided, including: receiving resource configuration information, wherein the resource configuration information is used for determining the position of a second OFDM symbol, and the second OFDM symbol is used for transmitting a second signal corresponding to a second SCS, and1 second OFDM symbol and 2 second OFDM symbolsⁿThe first OFDM symbols are aligned in the time domain, 2ⁿThe first OFDM symbol is used for repeatedly transmitting a first signal corresponding to a first SCS, the first SCS is 2 of a second SCSⁿMultiple, where n is a positive integer.

Optionally, the method may be further described as: receiving resource configuration information, where the resource configuration information is used to determine a resource location (e.g., a time domain location, or a time domain location and a frequency domain location) of a second signal corresponding to a second SCS, and a symbol location of the second signal includes a second OFDM symbol, 1 second OFDM symbol, and 2 second OFDM symbolsⁿA first OFDM symbol is aligned in time domain, 2ⁿThe first OFDM symbol is used for repeatedly transmitting a first signal corresponding to a first SCS, the first SCS is 2 of a second SCSⁿMultiple, where n is a positive integer.

In one possible design, the method further includes: in 2ⁿA first signal is received on a first one of the first OFDM symbols.

In one possible design, the method further includes: scheduling information of the first signal is received, wherein the scheduling information is used for indicating an encoding mechanism of the first signal, and a code rate indicated by the encoding mechanism is smaller than a first threshold value.

In a fourth aspect, a method for transmitting a data channel is provided, including: transmitting resource configuration information indicating a location of a second OFDM symbol for transmitting a second signal corresponding to a second SCS, 1Second OFDM symbol and 2ⁿThe first OFDM symbols are aligned in the time domain, 2ⁿThe first OFDM symbol is used for repeatedly transmitting a first signal corresponding to a first SCS, the first SCS is 2 of a second SCSⁿMultiple, where n is a positive integer.

Optionally, the method may be further described as: sending resource configuration information, where the resource configuration information is used to indicate a resource location (e.g., a time domain location, or a time domain location and a frequency domain location) of a second signal corresponding to a second SCS, and a symbol location of the second signal includes a second OFDM symbol, 1 second OFDM symbol, and 2 second OFDM symbolsⁿA first OFDM symbol is aligned in time domain, 2ⁿThe first OFDM symbol is used for repeatedly transmitting a first signal corresponding to a first SCS, the first SCS is 2 of a second SCSⁿMultiple, where n is a positive integer.

In one possible design, the method further includes: in 2ⁿThe first signal is repeatedly transmitted over the first OFDM symbol.

In a fifth aspect, an apparatus is provided, which may be a terminal device, an apparatus in a terminal device, or an apparatus capable of being used in cooperation with a terminal device. In one design, the apparatus may include a module corresponding to one or more of the methods/operations/steps/actions described in the first aspect or the third aspect, where the module may be a hardware circuit, a software circuit, or a combination of a hardware circuit and a software circuit. In one design, the apparatus may include a processing module and a communication module. In an exemplary manner, the first and second electrodes are,

the communication module is used for receiving a first signal by using a first SCS; wherein the first signal is at 2ⁿIs repeatedly transmitted on the first OFDM symbol, 2ⁿOne first OFDM symbol and1 secondTwo OFDM symbols are aligned in time domain, the 1 second OFDM symbol is used for transmitting a second signal corresponding to a second SCS, the first SCS is 2 of the second SCSⁿMultiple, where n is a positive integer. The processing module is used for processing the first signal.

In one possible design, the communication module is specifically configured to: in said 2ⁿThe first signal is received on a first one of the first OFDM symbols.

In one possible design, the communication module is further to: receiving resource configuration information, the resource configuration information being used for determining the position of the second OFDM symbol.

In one possible design, the communication module is further to: scheduling information of the first signal is received, wherein the scheduling information is used for indicating an encoding mechanism of the first signal, and a code rate indicated by the encoding mechanism is smaller than a first threshold value.

In a sixth aspect, an apparatus is provided, which may be a network device, an apparatus in a network device, or an apparatus capable of being used with a network device. In one design, the apparatus may include a module corresponding to one or more of the methods/operations/steps/actions described in the second aspect or the fourth aspect, where the module may be a hardware circuit, a software circuit, or a combination of a hardware circuit and a software circuit. In one design, the apparatus may include a processing module and a communication module. In an exemplary manner, the first and second electrodes are,

the communication module is configured to: transmitting a first signal using a first SCS; wherein the first signal is at 2ⁿIs repeatedly transmitted on the first OFDM symbol, 2ⁿAligning a first OFDM symbol and a second OFDM symbol in time domain, wherein the first OFDM symbol and the second OFDM symbol are used for transmitting a second signal corresponding to a second SCS, and the first SCS is 2 of the second SCSⁿMultiple, where n is a positive integer. The processing module is configured to generate the first signal.

In one possible design, the communication module is further to: and sending resource configuration information, wherein the resource configuration information is used for indicating the position of the second OFDM symbol.

In one possible design, the communication module is further to: and sending scheduling information of the first signal, wherein the scheduling information is used for indicating an encoding mechanism of the first signal, and a code rate indicated by the encoding mechanism is smaller than a first threshold value.

For the related introduction of the first signal, the second signal and the resource allocation information, please refer to the second aspect, which is not described herein again.

In a seventh aspect, an embodiment of the present application provides an apparatus, where the apparatus includes a processor, configured to implement the method described in the first aspect or the third aspect. The apparatus may also include a memory to store instructions. The memory is coupled to the processor, and the processor, when executing the instructions stored in the memory, may implement the method described in the first aspect or the third aspect. The apparatus may also include a communication interface for the apparatus to communicate with other devices, such as a transceiver, circuit, bus, module, pin, or other type of communication interface, which may be network devices. In one possible arrangement, the apparatus comprises:

a memory to store instructions;

a processor to, with a communication interface: receiving a first signal using a first SCS; wherein the first signal is at 2ⁿIs repeatedly transmitted on the first OFDM symbol, 2ⁿAligning a first OFDM symbol and a second OFDM symbol in time domain, wherein the first OFDM symbol and the second OFDM symbol are used for transmitting a second signal corresponding to a second SCS, and the first SCS is 2 of the second SCSⁿMultiple, where n is a positive integer. The processing module is used to process (e.g., demodulate, decode, etc.) the first signal.

In one possible design, the receiving a first signal includes: in said 2ⁿThe first signal is received on a first one of the first OFDM symbols.

In one possible design, the processor is further to, with the communication interface: receiving resource configuration information, the resource configuration information being used for determining the position of the second OFDM symbol.

In one possible design, the processor is further to, with the communication interface: scheduling information of the first signal is received, wherein the scheduling information is used for indicating an encoding mechanism of the first signal, and a code rate indicated by the encoding mechanism is smaller than a first threshold value.

In an eighth aspect, an embodiment of the present application provides an apparatus, which includes a processor, and is configured to implement the method described in the second aspect or the fourth aspect. The apparatus may also include a memory to store instructions. The memory is coupled to the processor, and the processor, when executing the instructions stored in the memory, may implement the method described in the second or fourth aspect. The apparatus may also include a communication interface for the apparatus to communicate with other devices, such as a transceiver, circuit, bus, module, pin, or other type of communication interface, which may be network devices. In one possible arrangement, the apparatus comprises:

a memory for storing program instructions;

a processor to, with a communication interface: transmitting a first signal using a first SCS; wherein the first signal is at 2ⁿIs repeatedly transmitted on the first OFDM symbol, 2ⁿAligning a first OFDM symbol and a second OFDM symbol in time domain, wherein the first OFDM symbol and the second OFDM symbol are used for transmitting a second signal corresponding to a second SCS, and the first SCS is 2 of the second SCSⁿMultiple, where n is a positive integer.

In one possible design, the processor is further to, with the communication interface: and sending resource configuration information, wherein the resource configuration information is used for indicating the position of the second OFDM symbol.

In one possible design, the processor is further to, with the communication interface: and sending scheduling information of the first signal, wherein the scheduling information is used for indicating an encoding mechanism of the first signal, and a code rate indicated by the encoding mechanism is smaller than a first threshold value.

In a ninth aspect, there is provided a computer readable storage medium comprising instructions which, when run on a computer, cause the computer to perform the method of the first, second, third or fourth aspect.

In a tenth aspect, there is provided a computer program product comprising instructions which, when run on a computer, cause the computer to perform the method of the first, second, third or fourth aspect.

In an eleventh aspect, a chip is provided, where the chip includes a processor, and the processor is configured to execute the transmission method for a data channel according to any one of the first aspect, the second aspect, the third aspect, or the fourth aspect. In one possible design, the chip further includes a transceiver pin, and the transceiver pin is configured to transmit the received code instruction to the processor, so that the processor is configured to perform the method according to any one of the first aspect, the second aspect, the third aspect, or the fourth aspect. Alternatively, the code instructions may come from a memory internal to the chip or from a memory external to the chip.

In a twelfth aspect, a chip system is provided, where the chip system includes a processor and may further include a memory, and is configured to implement the method of any one of the first aspect, the second aspect, the third aspect, or the fourth aspect. The chip system may be formed by a chip, and may also include a chip and other discrete devices.

In a thirteenth aspect, a communication system is provided, which includes the apparatus of the fifth aspect and the apparatus of the sixth aspect, or which includes the apparatus of the seventh aspect and the apparatus of the eighth aspect.

Drawings

Fig. 1 is a schematic diagram of a resource grid according to an embodiment of the present application;

FIG. 2 is a schematic diagram of another resource grid provided in an embodiment of the present application;

fig. 3 is a schematic frequency spectrum diagram of a reference signal of LTE on an OFDM symbol according to an embodiment of the present disclosure;

fig. 4 is a schematic frequency spectrum diagram of NR PDSCH on OFDM symbols provided in the embodiment of the present application;

fig. 5 is a schematic diagram of a communication system according to an embodiment of the present application;

fig. 6 is a schematic diagram of a cyclic prefix provided in an embodiment of the present application;

fig. 7 is a schematic diagram of another cyclic prefix provided in an embodiment of the present application;

FIG. 8 is a schematic diagram of a cyclic suffix as provided by an embodiment of the present application;

fig. 9 is a flowchart of a transmission method of a data channel according to an embodiment of the present application;

fig. 10A is a first schematic diagram of PDSCH repeated transmission provided in the embodiment of the present application;

fig. 10B is a diagram illustrating a PDSCH repeated transmission according to an embodiment of the present application;

fig. 10C is a third schematic diagram of PDSCH repeated transmission provided in the embodiment of the present application;

fig. 11 is a sending end sending 2 provided in this embodiment of the present applicationⁿA schematic diagram of a first OFDM symbol;

fig. 12 is a receiving end receiving apparatus 2 according to an embodiment of the present applicationⁿA schematic diagram of a first OFDM symbol;

fig. 13A is a schematic frequency spectrum diagram of a 30kHz signal on an OFDM symbol according to an embodiment of the present application;

FIG. 13B is a schematic diagram of a spectrum of another 30kHz signal on an OFDM symbol according to an embodiment of the present application;

FIG. 14 is a schematic diagram of a resource grid according to an embodiment of the present application;

fig. 15 is a first schematic diagram of a resource pattern according to an embodiment of the present application;

fig. 16 is a second schematic diagram of a resource pattern according to an embodiment of the present application;

fig. 17 is a third schematic diagram of a resource pattern according to an embodiment of the present application;

fig. 18 is a schematic diagram illustrating a location of an RE carrying a reference signal according to an embodiment of the present application;

FIG. 19 is a schematic diagram of an apparatus according to an embodiment of the present disclosure;

fig. 20 is a schematic structural diagram of another apparatus provided in the embodiment of the present application.

Detailed Description

The technical scheme provided by the embodiment of the application can be applied to various communication systems. For example, the technical solution provided by the embodiment of the present application can be applied to, but is not limited to: 5G, LTE or a future communication system. Among them, 5G may also be referred to as New Radio (NR).

The technical scheme provided by the embodiment of the application can be applied to wireless communication among communication devices. The communication device may include a network device and a terminal device. The wireless communication between the communication devices may include: wireless communication between a network device and a terminal device, wireless communication between a network device and a network device, and wireless communication between a terminal device and a terminal device. In the embodiments of the present application, the term "wireless communication" may also be simply referred to as "communication", and the term "communication" may also be described as "data transmission", "signal transmission", "information transmission", or "transmission", or the like. In embodiments of the present application, the transmission may comprise sending or receiving. For example, the transmission may be an uplink transmission, for example, the terminal device may send a signal to the network device; the transmission may also be downlink transmission, for example, the network device may send a signal to the terminal device.

The technical solution provided in the embodiments of the present application is described by taking communication between a network device and a terminal device as an example, where the network device is a scheduling entity and the terminal device is a subordinate entity. Those skilled in the art may use the technical solution for performing wireless communication between other scheduling entities and subordinate entities, for example, wireless communication between a macro base station and a micro base station, for example, device-to-device (D2D) communication between a first terminal and a second terminal.

The terminal device related to the embodiment of the present application may also be referred to as a terminal, and may be a device having a wireless transceiving function. The terminal can be deployed on land, including indoors or outdoors, hand-held or vehicle-mounted; can also be deployed on the water surface (such as a ship and the like); and may also be deployed in the air (e.g., airplanes, balloons, satellites, etc.). The terminal device may be a User Equipment (UE). Wherein the UE comprises a handheld device, an in-vehicle device, a wearable device, or a computing device with wireless communication capabilities. Illustratively, the UE may be a mobile phone (mobile phone), a tablet computer, or a computer with wireless transceiving function. The terminal device may also be a Virtual Reality (VR) terminal device, an Augmented Reality (AR) terminal device, a wireless terminal in industrial control, a wireless terminal in unmanned driving, a wireless terminal in telemedicine, a wireless terminal in smart grid, a wireless terminal in smart city (smart city), a wireless terminal in smart home (smart home), and so on. In the embodiment of the present application, the apparatus for implementing the function of the terminal may be the terminal, or may be an apparatus capable of supporting the terminal to implement the function, such as a chip system. In the embodiment of the present application, the chip system may be composed of a chip, and may also include a chip and other discrete devices. In the embodiment of the present application, a device for implementing a function of a terminal is taken as an example, and a technical solution provided in the embodiment of the present application is described.

The network device according to the embodiment of the present application includes a Base Station (BS), which may be a device deployed in a radio access network and capable of performing wireless communication with a terminal. The base station may have various forms, such as a macro base station, a micro base station, a relay station, an access point, and the like. For example, the base station related to the embodiment of the present application may be a base station in 5G or a base station in LTE, where the base station in 5G may also be referred to as a Transmission Reception Point (TRP) or a gnb (gnnodeb). In this embodiment of the present application, the apparatus for implementing the function of the network device may be a network device, or may be an apparatus capable of supporting the network device to implement the function, for example, a chip system. In this embodiment of the present application, a device for implementing a function of a network device is taken as an example of a network device, and a technical solution provided in this embodiment of the present application is described.

The embodiment of the present application describes a technical solution provided by the embodiment of the present application, taking LTE and 5G sharing frequency domain resources as an example. The scenario does not limit the application scenario of the embodiment of the present application, for example, the technical solution provided in the embodiment of the present application may also be used for sharing air interface resources between other systems, or may be used for sharing air interface resources between different signals in the same system. Or described as: the technical scheme provided by the embodiment of the application can also be used for rate matching between other systems, or can be used for rate matching between different signals in the same system.

Illustratively, table 1 shows frequency domain resources available for operator-deployed LTE carriers, and table 2 shows frequency domain resources available for operator-deployed NR carriers at sub6GHz (below 6 GHz). In tables 1 and 2, FDD is frequency division duplex (frequency division duplex) and TDD is time division duplex (time division duplex). When the terminal and the network equipment are in communication, the lower the carrier frequency used, the smaller the path loss attenuation, and the better the cell coverage. Therefore, in order to improve cell coverage and fully utilize the unused frequency domain resources of the LTE carrier, NR support and LTE carrier are deployed on the same frequency domain resources, e.g., NR and LTE are both deployed on band1, band3, band5, or band 38. NR and LTE may also be deployed on other shared frequency domain resources, which is not limited in the embodiments of the present application.

TABLE 1 available frequency bands for LTE

TABLE 2 available frequency band for NR below 6GHz

In NR and LTE shared resources, in order to support normal communication of the LTE system, NR cannot use LTE-specific signals or channel-specific resources when using resources that are not used by LTE, for example, NR cannot use CRS of LTE and/or resources to which PDCCH of LTE is to be mapped in shared resources. That is, in the shared resource, NR needs to perform rate matching on a resource to which a specific signal of LTE is to be mapped. The embodiments of the present application are described by taking an example that a signal (e.g., PDSCH) in NR needs to perform rate matching on a resource to which CRS of LTE is to be mapped.

In NR or LTE, a network device and a terminal may perform data transmission through time-frequency resources. The time-frequency resources used for data transmission may be represented as a resource grid. In the resource grid, a Resource Element (RE) is a resource unit for data transmission or a resource unit for resource mapping of data to be transmitted. One RE corresponds to one time domain symbol in the time domain and one subcarrier in the frequency domain.

The LTE system mainly supports 15kHz (kilohertz) SCS. To support various traffic requirements and/or application scenarios, NR may support multiple types of subcarrier spacing, e.g., 15kHz, 30kHz, 60kHz, 120kHz, etc. When LTE and NR share frequency domain resources, LTE and NR may use either the same subcarrier spacing or different subcarrier spacings.

If the SCS employed by the NR is the same as the SCS employed by the LTE, the NR signal needs to perform rate matching on the resource corresponding to the LTE signal, so as to avoid mutual interference between the NR signal and the LTE signal. For example, when NR rate-matches on resources to which CRS of LTE is to be mapped, if both LTE and NR use 15kHz, NR does not map NR PDSCH on REs for mapping CRS of LTE in shared resources. For example, in the shared resource, the NR PDSCH corresponding to the SCS of 15kHz is not mapped to the RE for carrying the CRS of LTE, so that the NR PDSCH corresponding to the SCS of 15kHz does not interfere with the CRS of LTE, and the NR PDSCH corresponding to the SCS of 15kHz can fully utilize the unused time-frequency resource of the CRS of LTE, thereby improving the utilization rate of the shared resource. The resources to which the CRS of the LTE is mapped may also be described as: and resources used for mapping the CRS of the LTE, resources corresponding to the CRS of the LTE, and the like.

However, if the SCS adopted by the NR is different from the SCS adopted by the LTE, when the NR performs rate matching on the resources corresponding to the CRS of the LTE, mutual interference between the signal (e.g., PDSCH) in the NR and the CRS of the LTE may not be avoided. For example, the SCS of the NR network is 30kHz, which is described with reference to fig. 1 and 2. The resource grid shown in fig. 1 is SCS using 15kHz for LTE, and SCS using 30kHz for NR for resource grid shown in fig. 2. The resource grid shown in fig. 1 and the resource grid shown in fig. 2 are for the same time-frequency resource. In fig. 1, the black squares represent REs carrying CRS of LTE. In fig. 2, the black squares indicate REs to which NR PDSCH is not mapped, i.e., indicate REs to which NR PDSCH needs to be rate-matched based on LTE CRS. It can be seen that when NR PDSCH is transmitted on the resource grid shown in fig. 2, NR PDSCH is rate-matched on REs corresponding to LTE CRS. In the same time-frequency resource, there is an overlapping portion between the rate-matched REs of the NR PDSCH and the corresponding REs of the LTE CRS.

The resource grid shown in fig. 1 includes 14 time domain symbols from the 1 st to the 14 th. Fig. 3 is a schematic diagram of a frequency spectrum of CRS of LTE on the 5 th time domain symbol in the resource grid shown in fig. 1, in fig. 3, bold arrows indicate subcarriers used for carrying the CRS of LTE, dashed lines indicate subcarriers not used for carrying the CRS of LTE, and an interval between adjacent subcarriers is 15 kHz. The resource grid shown in fig. 2 includes 28 time domain symbols from the 1 st to the 28 th symbols. Fig. 4 is a schematic diagram of a frequency spectrum on the 9 th or 10 th time domain symbol in the resource grid shown in fig. 2. The solid-line unidirectional arrows in fig. 4 indicate subcarriers that can carry NR PDSCH, the dashed-line unidirectional arrows indicate subcarriers that cannot carry NR PDSCH (for rate matching), and the interval between adjacent subcarriers is 30 kHz. The bold double-headed arrows in fig. 4 are used to describe interference that the signal of the NR PDSCH may cause to the LTE CRS at the subcarrier position for carrying the LTE CRS, on the 5 th time domain symbol shown in fig. 1 or on the 9 th or 10 th time domain symbol shown in fig. 2.

Fig. 4 includes 12 30kHz subcarriers from subcarrier #0 to subcarrier # 11. As can be seen from fig. 4, the signal energy of the 30kHz subcarrier #2 is non-zero at the position of the 15kHz subcarrier #3 (at the LTE CRS position), and the signal energy of the 30kHz subcarrier #3 is non-zero at the position of the 15kHz subcarrier # 3. That is, LTE CRS on subcarrier #3 at 15kHz may be interfered by NR PDSCH; LTE CRS on subcarrier #3 at 15kHz may also interfere with NR PDSCH.

As can be seen from the above examples, in a scenario of co-frequency band deployment of two communication networks supporting different SCS, since the first SCS is not orthogonal to the second SCS, the signal corresponding to the first SCS and the signal corresponding to the second SCS may interfere with each other. In order to solve the technical problem, the present application provides a transmission method of a data channel, and specific contents thereof can be referred to below.

It should be noted that, the common frequency band deployment scenario of two communication networks supporting different SCS includes, but is not limited to: the method comprises the following steps of a scene of common-frequency-band deployment of the NR network and the LTE network, a scene of common-frequency-band deployment of the two NR networks and the like.

The network architecture and the service scenario described in the embodiment of the present application are for more clearly illustrating the technical solution of the embodiment of the present application, and do not form a limitation on the technical solution provided in the embodiment of the present application, and as a person of ordinary skill in the art knows that along with the evolution of the network architecture and the appearance of a new service scenario, the technical solution provided in the embodiment of the present application is also applicable to similar technical problems.

Fig. 5 is a schematic diagram of a communication system to which the technical solution provided in the embodiment of the present application is applicable, where the communication system may include one or more network devices (only one shown in fig. 5) and one or more terminals (only one shown in fig. 5). Fig. 5 is a schematic diagram, and does not limit the application scenarios of the technical solutions provided in the present application.

To facilitate understanding, the terms referred to in the present application are briefly described below.

1. Data channel

The data channel is a channel for transmitting data. Alternatively, the data channel may refer to a PDSCH or a (physical uplink shared channel, PUSCH). The embodiments of the present application are described in the following behavior examples, and described in the following case where the downlink data channel is the PDSCH. When the technical scheme provided by the embodiment of the application is applied to uplink, the data channel of the technical scheme can be a PUSCH (physical uplink shared channel) sent by a terminal for network equipment.

2. Reference Signal (RS)

The reference signal may be a known signal provided by the transmitting end to the receiving end for channel estimation or channel sounding. In the embodiment of the present application, the reference signal in the LTE includes at least one of a CRS of the LTE, a channel state information reference signal (CSI-RS) of the LTE, and a demodulation reference signal (DMRS) of the LTE. The reference signal in the NR includes at least one of a CSI-RS of the NR and a DMRS of the NR. When the technical scheme provided by the embodiment of the application is applied to uplink, the reference signal may be a DMRS or a Sounding Reference Signal (SRS), or the like.

3. Time domain symbol, slot, subcarrier spacing

In the embodiment of the present application, the time domain symbol may be an OFDM symbol or a discrete fourier transform spread orthogonal frequency division multiplexing (DFT-s-OFDM) symbol. The embodiment of the present application describes that a time domain symbol is an OFDM symbol as an example. In the embodiment of the present application, a time domain symbol may also be referred to as a symbol for short.

A slot (slot) may be defined in the time domain of a resource grid or time-frequency resource, and a positive integer number of time-domain symbols, e.g., 7, 14, 6, or 12, may be included in one slot. A positive integer number of slots may be included in one subframe. Illustratively, for a system supporting multiple subcarrier spacings, 1 slot is included in one subframe when the subcarrier spacing is 15 kilohertz (kHz); when the subcarrier spacing is 30kHz, one subframe includes 2 slots; when the subcarrier interval is 60kHz, 4 slots are included in one subframe.

The subcarrier is a basic unit of frequency domain resources. The subcarrier spacing is used to describe the bandwidth of the subcarriers or to describe the spacing between adjacent subcarriers.

An OFDM symbol is a basic unit of time domain resources. The OFDM symbol may include a desired signal and a Cyclic Prefix (CP), or the OFDM symbol may include a desired signal and a cyclic suffix, or the OFDM symbol may include a desired signal (i.e., not include a cyclic prefix and a cyclic suffix). The effective length of the OFDM symbol is the length of the useful signal. The length of the OFDM symbol is equal to the sum of the effective length of the OFDM symbol and the length of the cyclic prefix. A positive integer number of OFDM symbols may be included in one slot. For example, for Normal CP (NCP), one slot may include 14 OFDM symbols. For Extended CP (ECP), 1 slot may contain 12 OFDM symbols. The embodiment of the present application is illustrated in which 1 slot includes 14 OFDM symbols. In 1 slot, 14 OFDM symbols are numbered in order from small to large, that is, one slot includes OFDM symbol #0 to OFDM symbol # 13. Here, OFDM symbol # X denotes the OFDM symbol with the number X.

It should be noted that the length of the OFDM symbol may be inversely proportional to the subcarrier spacing. In other words, as the subcarrier spacing increases, the length of the OFDM symbol decreases. For example 2ⁿThe length of the OFDM symbol corresponding to a first SCS is equal to the length of the OFDM symbol corresponding to a second SCS, the first SCS is 2 of the second SCSⁿMultiple, where n is a positive integer. For example, the length of 2 OFDM symbols of 30kHz is equal to the length of 1 OFDM symbol of 15 kHz.

Similar to the length of an OFDM symbol, the length of a slot is also inversely proportional to the subcarrier spacing. In other words, as the subcarrier spacing increases, the length of the slot decreases.

Illustratively, table 3 shows the correspondence between the subcarrier spacing and the length of the OFDM symbol and the length of the slot.

TABLE 3

4. RE, Resource Block (RB), resource grid

REs are resource granularity for transmitting data. One RE may be used to map one complex symbol. One RE corresponds to one OFDM symbol in the time domain and one subcarrier in the frequency domain. In the embodiment of the present application, the subcarrier number of the RE may start from 0. In a bandwidth part (BWP), the subcarrier number of REs may be 0 to 12 × K-1, where K is the number of RBs included in the BWP in the frequency domain.

In the embodiment of the present application, the index of the RE includes a subcarrier number and a number of an OFDM symbol. The index of RE can be represented as (k, l). Where k denotes a subcarrier number and l denotes a number of an OFDM symbol. As illustrated in connection with fig. 1, each row of the resource grid shown in fig. 1 represents one subcarrier, each column represents one OFDM symbol, and each square represents one RE. Illustratively, the index of the first RE in the lower left corner of the resource grid shown in fig. 1 is (0, 0).

For convenience of description, in the embodiments of the present application, (k, l) may be used to represent a corresponding RE, which is described herein in a unified manner and is not described in detail below.

In the frequency domain, RBs may be defined in a resource grid. A positive integer number of subcarriers, e.g., 6 or 12, may be included in one RB. The definition of RB can also be extended to the time domain, e.g., one RB includes a positive integer number of subcarriers in the frequency domain and a positive integer number of time domain symbols in the time domain, e.g., one RB is a time-frequency resource block including 12 subcarriers in the frequency domain and 7 or 14 time domain symbols in the time domain.

The resource grid, which may also be referred to as an RB grid (grid), includes a positive integer number of RBs.

5. Cyclic prefix and cyclic suffix

The cyclic prefix is the copy of the last part of the useful signal in the OFDM symbol to the header of the OFDM symbol. Thus, the OFDM symbol includes a cyclic prefix for making transmission of the OFDM symbol resistant to inter-symbol interference (ISI) and inter-channel interference (ICI) and a useful signal.

As shown in FIG. 6, taking the 15kHz SCS OFDM symbol as an example, the useful signal in the OFDM symbol includes 2048 sampling points, and the cyclic prefix includes the last 144 sampling points (i.e., 1905 to 2048 sampling points) of the useful signal.

As shown in FIG. 7, taking the 30kHz SCS OFDM symbol as an example, the useful signal in the OFDM symbol comprises 1024 sampling points, and the cyclic prefix comprises the last 72 sampling points (i.e. 953-1024 sampling points) of the useful signal.

For different OFDM symbols of the same SCS, the cyclic prefix length of different OFDM symbols may be the same or different. As can be seen from table 3, taking the 15kHz SCS OFDM symbol as an example, since the absolute time length of one sampling point is 1/(2048 × 15 × 1000) seconds, in order to make the absolute time length of 14 OFDM symbols included in 1 slot be 1ms, for 7 OFDM symbols in every 0.5ms, the cyclic prefix length of the first OFDM symbol is 160 sampling points, and the cyclic prefixes of the other 6 OFDM symbols are 144 sampling points.

The cyclic suffix is the copying of the front portion of the useful signal in the OFDM symbol to the tail of the OFDM symbol. Thus, the OFDM symbol includes a useful signal and a cyclic suffix for enabling the OFDM symbol to be resistant to ISI and ICI.

As shown in FIG. 8, taking the 30kHz SCS OFDM symbol as an example, the useful signal in the OFDM symbol comprises 1024 sampling points, and the cyclic suffix comprises the first 72 sampling points (i.e. No. 1-72 sampling points) of the useful signal.

In the embodiment of the present application, for convenience of description, if there is no special description, the sampling points may all be SCS based on 15kHz, that is, the time domain length of the sampling points of the 15kHz signal or the time interval between adjacent sampling points is Ts, which is not described in detail below.

It is understood that if the point (size) of Fast Fourier Transform (FFT) of the 30kHz SCS signal is 2048, the useful signal in the 30kHz SCS OFDM symbol also includes 2048 samples. In this case, the time domain length of the sampling point of the 30kHz signal is actually 1/(2048 × 30000) seconds, which is equal to Ts/2, i.e. the useful signal of the OFDM symbol of the 30kHz SCS is considered to include 1024 sampling points of the 15kHz SCS.

6、BWP

BWP may also be referred to as carrier bandwidth part (carrier bandwidth part). In the frequency domain, a BWP includes a positive consecutive integer number of resource units, such as a positive consecutive integer number of subcarriers, Resource Blocks (RBs), or Resource Block Groups (RBGs). Wherein, a positive integer number of RBs, such as 4 or 8, is included in one RBG. A BWP may be a downstream BWP or an upstream BWP. The uplink BWP is used for the terminal to send signals to the network device, and the downlink BWP is used for the network device to send signals to the terminal. In the embodiment of the present application, the positive integer may be 1, 2, 3 or more, which is not limited in the embodiment of the present application.

For each BWP, a parameter set (numerology) of the BWP may be configured independently by means of pre-configuration or signaling sent by the network device to the terminal. The numerology of different BWPs may or may not be the same. numerology may be defined by, but is not limited to, one or more of the following parameter information: subcarrier spacing, Cyclic Prefix (CP), information of time unit, bandwidth of BWP, etc. For example, numerology may be defined by subcarrier spacing and CP.

The subcarrier spacing may be an integer greater than or equal to 0. For example, it may be 15kHz, 30kHz, 60kHz, 120kHz, 240kHz, 480kHz, etc. The multiple relationship of the different subcarrier spacings may be an integer multiple of 2. Other values may of course be envisaged.

The CP information may include a CP length and/or a CP type. For example, the CP may be NCP, or ECP.

The time unit is used to indicate a time unit in the time domain, and may be, for example, a sampling point, a time domain symbol, a micro slot, a subframe, or a radio frame. The information of the time unit may include a type, a length, or a structure of the time unit, etc. The unit length of time may be: the number of time domain symbols included in the time slot, and/or the number of time domain symbols or time slots included in the subframe, and/or the number of subframes or time slots included in the radio frame.

BWP may be a contiguous segment of resources in the frequency domain. BWP may be referred to as a carrier bandwidth part (carrier bandwidth part), a sub-band (subband) bandwidth, a narrowband (narrowband) bandwidth, or other names, and the names are not limited in this embodiment. Optionally, the BWP may also include discrete resources in the frequency domain, which is not limited in this embodiment of the application.

In the description of this application, "/" means "or" unless otherwise stated, for example, A/B may mean A or B. "and/or" herein is merely an association describing an associated object, and means that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. Further, "at least one" means one or more, "a plurality" means two or more. The terms "first", "second", and the like do not necessarily limit the number and execution order, and the terms "first", "second", and the like do not necessarily limit the difference.

It is noted that, in the present application, words such as "exemplary" or "for example" are used to mean exemplary, illustrative, or descriptive. Any embodiment or design described herein as "exemplary" or "e.g.," is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the word "exemplary" or "such as" is intended to present concepts related in a concrete fashion.

In the description of the present application, "indication" may include direct indication and indirect indication, and may also include explicit indication and implicit indication. If information indicated by certain information (such as resource configuration information described below) is referred to as information to be indicated, there are many ways of indicating the information to be indicated in a specific implementation process. For example, the information to be indicated may be directly indicated, such as indicating the information to be indicated itself or an index of the information to be indicated. For another example, the information to be indicated may also be indirectly indicated by indicating other information, where an association relationship or a mapping relationship exists between the other information and the information to be indicated. For another example, only a part of the information to be indicated may be indicated, while the other part of the information to be indicated is known or predetermined. In addition, the indication of the specific information can be realized by means of the arrangement order of each information agreed in advance (for example, specified by a protocol), so that the indication overhead can be reduced to a certain extent.

The technical solutions provided by the embodiments of the present application are specifically described below with reference to the drawings of the specification.

As shown in fig. 9, a method for transmitting a channel is provided for the embodiment of the present application, where the channel is a data channel, and the data channel is a PDSCH, for example, the method includes the following steps S101 to S102. Optionally, the method may be applied to other data channels or control channels, and the embodiments of the present application are not limited.

S101, the network equipment transmits the PDSCH to the terminal by using the first SCS.

Optionally, step S101 may also be expressed as: and the network equipment sends the PDSCH corresponding to the first SCS to the terminal.

Wherein PDSCH is in 2ⁿThe transmission is repeated on the first OFDM symbol.

Alternatively, PDSCH is at 2ⁿThe first OFDM symbol is repeatedly transmitted, and comprises: in shared bandwidth, NR PDSCH is at 2ⁿThe first OFDM symbol is transmitted repeatedly on each symbol. For example, in the shared bandwidth, data transmitted on the same subcarriers of different symbols is the same. The shared bandwidth may be a bandwidth of a frequency domain resource shared by the NR system and the LTE system, which may be represented as a shared RB, a shared subcarrier, and the like.

Alternatively, the frequency domain resources (e.g., in BWP or RBs for PDSCH transmission) for PDSCH transmission may include the shared bandwidth instead of the non-shared bandwidth, or may include the shared bandwidth and the non-shared bandwidth. In the non-shared bandwidth, the NR PDSCH is at 2ⁿEach symbol of the first OFDM symbolThe above may be repeatedly transmitted or may be independently transmitted, and the embodiments of the present application are not limited. In the non-shared bandwidth, when the NR PDSCH on each symbol is independently transmitted, data transmitted on the same subcarrier of different symbols may be the same or different, and the embodiment of the present application is not limited.

In the following embodiments, in order to simplify the description and facilitate understanding of the method provided by the embodiments of the present application in the time domain, a corresponding description may be made by taking an example in which the frequency domain resource for transmitting the PDSCH includes a shared bandwidth but not a non-shared bandwidth.

The 2ⁿAligning a first OFDM symbol and a second OFDM symbol in time domain, wherein the first OFDM symbol and the second OFDM symbol are used for transmitting a reference signal corresponding to a second SCS, and the first SCS is 2 of the second SCSⁿMultiple, where n is a positive integer. In other words, in case that 1 second OFDM symbol is used to transmit the reference signal corresponding to the second SCS, 2 aligned in time domain with the second OFDM symbolⁿThe first OFDM symbol is used for repeated transmission of PDSCH.

In addition, 2ⁿThe aligning of the first OFDM symbol and the 1 second OFDM symbol in the time domain may refer to: 2ⁿThe first OFDM symbol shares the same time domain resources as the 1 second OFDM symbol.

As illustrated in fig. 1 and 2, fig. 1 and 2 respectively show resource grids of the same time-frequency resource, where the bandwidth of the time-frequency resource is 360kHz and the time length is 1 ms. In fig. 1, the resource grid has a subcarrier spacing of 15kHz for REs. In fig. 2, the resource grid has a subcarrier spacing of 30kHz for REs. As can be seen from fig. 1 and 2, the first OFDM symbol in the resource grid shown in fig. 1 is aligned with the first OFDM symbol and the second OFDM symbol in the resource grid shown in fig. 2 in the time domain; by analogy, the fourteenth OFDM symbol in the resource grid shown in fig. 1 is aligned in the time domain with the twenty-seventh OFDM symbol and the twenty-eighth OFDM symbol in the resource grid shown in fig. 2. That is, the 1 second OFDM symbol in fig. 1 is aligned in the time domain with the 2 first OFDM symbols in fig. 2 in the time domain.

In the examples of the present applicationIn (2)ⁿThe first OFDM symbol is used for repeatedly transmitting PDSCH, and at least one of the following modes is included:

mode I for the above 2ⁿA first OFDM symbol, when n is 1, a first OFDM symbol of the two first OFDM symbols including a cyclic prefix, and a second first OFDM symbol including a cyclic suffix.

That is, of the two first OFDM symbols, the first OFDM symbol includes a desired signal and a cyclic prefix, and the second OFDM symbol includes a desired signal and a cyclic suffix.

For example, with reference to fig. 10A, taking the first SCS as 30kHz and the second SCS as 15kHz as examples, for the time-domain signal of the PDSCH mapped in the shared bandwidth, the useful signal in the first OFDM symbol includes samples from 1 to 1024, and the cyclic prefix of the first OFDM symbol includes samples from 953 to 1024. The useful signal in the second first OFDM symbol comprises 1-1024 sampling points, and the cyclic suffix of the second first OFDM symbol comprises 1-72 sampling points. As can be seen from FIG. 10A, the last 2048 sampling points of the two first OFDM symbols comprise 2 identical sampling points from No. 1 to No. 1024. That is, when two 30kHz OFDM symbols are FFT with 15kHz signals: after the CP of 144 sampling points is removed, under a sampling window of 2048 sampling points, sampling points 1-1024 are repeated for 2 times on the time domain.

Mode two, in the above 2ⁿIn the first OFDM symbols, the data of the PDSCH transmitted on the ith first OFDM symbol is obtained after the phase rotation processing of the corresponding frequency domain signal, i is more than 1 and less than or equal to 2ⁿIs an integer of (1). Exemplarily, the input signal on the k subcarrier of the IFFT on the ith first OFDM symbol is a_1,ke^j*ω，a_1,kRepresenting the frequency domain signal on the kth subcarrier on the 1 st first OFDM symbol; ω represents the phase magnitude that needs to be rotated when the phase rotation processing is performed on the frequency domain signal.

For example, fig. 11 shows an example of repeatedly transmitting PDSCH on 2 first OFDM symbols. For example, the first SCS is 30kHz, and the frequency domain resources on the first OFDM symbol for transmitting PDSCH include shared bandwidth. In the shared bandwidth, are the sameThe data mapped on the first OFDM symbol and the second first OFDM symbol are the same, and are respectively a_1,nTo a_1,n+k. Wherein, a_1,nTo a_1,n+kThe values of different data may be the same or different for complex signals, and the embodiments of the present application are not limited. For a on the second OFDM symbol_1,nTo a_1,n+kThe respective phase rotations can be performed. Alternatively, as shown in fig. 11, when the frequency domain resources for transmitting the PDSCH on the first OFDM symbol include the unshared bandwidth, the respective data is mapped on the same subcarrier, the first OFDM symbol, and the second first OFDM symbol in the unshared bandwidth. In this embodiment, the frequency domain resource for transmitting the PDSCH may be preconfigured, or may be indicated by the network device for the terminal through signaling (e.g. DCI).

It can be appreciated that in the shared bandwidth, on the same sub-carriers, the 2ⁿThe frequency domain signals corresponding to the first OFDM symbols are the same.

Optionally, during the phase rotation process, the phase of the frequency domain signal rotation corresponding to the ith first OFDM symbol is proportional to i-1.

It should be noted that, after performing the phase rotation processing on the frequency domain signal on the first OFDM symbol, the time domain signal (i.e., the useful signal) of the first OFDM symbol may undergo cyclic shift.

Optionally, the specific implementation manner of the phase rotation processing is as follows: the frequency domain signal is multiplied by a phase rotation factor. The phase rotation factor is used to indicate the phase of the frequency domain signal rotation.

In the digital domain, for the subcarrier with index or number k, the phase rotation factor corresponding to the ith first OFDM symbol is:

wherein the CP Length on the ith OFDM symbol

For example: frequency domain signal of ith first OFDM symbol index or k-numbered subcarrierCorresponding phase rotation factor of

Specifically, taking fig. 11 as an example, the phase rotation factor corresponding to the frequency domain signal on the subcarrier numbered n on the 1 st first OFDM symbol is 1, that is, a_1,nThe signal itself; the phase rotation factor corresponding to the frequency domain signal on the subcarrier numbered n on the 2 nd first OFDM symbol is

Similarly, the phase rotation factor corresponding to the frequency domain signal on the subcarrier numbered n + k on the 1 st first OFDM symbol is 1, that is, a_1,n+kThe signal itself; the phase rotation factor corresponding to the frequency domain signal on the subcarrier numbered n on the 2 nd first OFDM symbol is

In the analog domain, for a subcarrier with index or number k, the phase rotation factor corresponding to the ith first OFDM symbol is:

wherein

Where N is the number of FFT points,

the number of subcarriers included for one RB.

The CP length of symbol i, which is the subcarrier spacing μ, is given in units of the number of sample points. Δ f is the size of the subcarrier spacing μ. T is_c1/(480 × 1000 × 4096). e is a natural constant. j is an imaginary unit, and the square of j is equal to-1.And pi is the circumferential ratio.

And the number of RBs contained in the carrier with the sub-carrier interval of mu and representing RRC signaling configuration is x, and the number of RBs represents uplink or downlink.

The carrier minimum RB number of the RRC signaling configuration subcarrier spacing u is the number of RBs shifted from one reference point. Mu.s₀Maximum subcarrier spacing of several carriers configured by RRC signaling.

Note that a subcarrier spacing of μmeans that the subcarrier spacing is 15kHz multiplied by 2 to the power of μ. For example, μ ═ 0, SCS corresponding to 15 kHz; μ ═ 1, SCS corresponding to 30 kHz; μ ═ 2, SCS corresponding to 60 kHz; μ ═ 3, SCS corresponding to 120 kHz; μ ═ 4, corresponding to SCS at 240 kHz.

For example, in conjunction with FIG. 10B, assume that the first SCS is 30kHz and the second SCS is 15 kHz. (1) A useful signal in the first OFDM symbol comprises 1-1024 sampling points; the cyclic prefix of the first OFDM symbol comprises 953-1024 sampling points. (2) For the second first OFDM symbol, the corresponding frequency domain signal is subjected to phase rotation processing, so that the useful signal is subjected to cyclic shift, and the useful signal after cyclic shift sequentially comprises 73-1024 sampling points and 1-72 sampling points. In this case, the cyclic prefix of the second first OFDM symbol includes the last 72 samples (i.e., samples # 1-72) of the cyclically shifted desired signal. As can be seen from FIG. 10B, the last 1024 sampling points of each of the two first OFDM symbols include 2 identical sampling points from number 1 to

number

1024, and 2048 sampling points. That is, sampling points 1 to 1024 are repeated 2 times in the time domain under the sampling window of the 2048 sampling points.

For example, in conjunction with FIG. 10C, assume that the first SCS is 60kHz and the second SCS is 15 kHz. (1) The useful signal in the first OFDM symbol comprises sampling points 1-512; the cyclic prefix of the first OFDM symbol comprises 477-512 sampling points. (2) For the second first OFDM symbol, because the corresponding frequency domain signal is subjected to phase rotation processing, the useful signal is subjected to cyclic shift, and the useful signal subjected to cyclic shift sequentially comprises No. 37-512 sampling points and No. 1-36 sampling points; the cyclic prefix of the second first OFDM symbol includes the last 36 samples (i.e., samples No. 1-36) of the cyclically shifted useful signal. (3) For the third first OFDM symbol, because the corresponding frequency domain signal is subjected to phase rotation processing, the useful signal is subjected to cyclic shift, and the useful signal subjected to cyclic shift sequentially comprises 73-512 sampling points and 1-72 sampling points; the cyclic prefix of the third first OFDM symbol includes the last 36 samples (i.e., samples 37-72) of the cyclically shifted useful signal. (4) For the fourth first OFDM symbol, because the corresponding frequency domain signal is subjected to phase rotation processing, the useful signal is subjected to cyclic shift, and the useful signal subjected to cyclic shift sequentially comprises sampling points of 109-512 numbers and sampling points of 1-108 numbers; the cyclic prefix of the fourth first OFDM symbol includes the last 36 samples (i.e., 73-108 samples) of the cyclically shifted useful signal. As can be seen from FIG. 10C, the last 2048 sampling points of the four first OFDM symbols comprise 4 identical sampling points No. 1-512. That is, sampling points #1 to # 512 are repeated 4 times in the time domain under the sampling window of 2048 sampling points.

For the second mode, as shown in FIG. 12, for 2ⁿA receiving end can obtain a time domain signal of an ith first OFDM symbol by removing a cyclic prefix in the ith first OFDM symbol; performing fast Fourier transform corresponding to the first SCS on the time domain signal of the ith first OFDM symbol to obtain a frequency domain signal subjected to phase rotation processing; and, for the subcarriers in the shared bandwidth, dividing the frequency domain signal after the phase processing by the phase rotation factor to determine the original frequency domain signal.

For convenience of description, the sub-carrier corresponding to the first SCS is simply referred to as the first sub-carrier, and the sub-carrier corresponding to the second SCS is simply referred to as the second sub-carrier. For a signal, repeating the signal in the time domain corresponds to interpolating the signal in the frequency domain by 0. Therefore, the temperature of the molten metal is controlled,if PDSCH is in 2ⁿRepeated transmission on the first OFDM symbol, then 2ⁿThe signal value of the PDSCH of the first SCS is equal to 0 at a location corresponding to the second SCS between two adjacent first subcarriers on any one of the first OFDM symbols. That is, in 2ⁿIn the first OFDM symbol, if the number of the second subcarrier in the resource grid is started from 0, the value of the signal of the first SCS is not 2ⁿThe integer multiple of the second subcarrier is equal to 0.

Taking the first SCS to be 30kHz and the second SCS to be 15kHz as an example, if the PDSCH is repeatedly transmitted on the ninth OFDM symbol and the tenth OFDM symbol in the resource grid shown in fig. 2, the frequency spectrum of the PDSCH on the ninth OFDM symbol can refer to fig. 13A. In fig. 13A, solid-line unidirectional arrows indicate subcarriers used for carrying PDSCH information, and dashed-line unidirectional arrows indicate subcarriers not used for carrying PDSCH information. Since on the ninth OFDM symbol in fig. 2, REs (1,8), (4,8), (7,8), and (10,8) are REs that are not used for carrying PDSCH. Therefore, in fig. 13A, subcarrier #1, subcarrier #4, subcarrier #7, and subcarrier #10 are indicated by dashed one-way arrows. In contrast to fig. 4, in the transmission method shown in fig. 13A, since the signal energy of the NR PDSCH at the position of the subcarrier #3 of 15kHz is equal to 0, the LTE CRS on the subcarrier #3 of 15kHz is not interfered by the NR PDSCH, and the LTE CRS on the subcarrier #3 of 15kHz is not interfered by the NR PDSCH. In the manner of fig. 13A, REs (1,8), (4,8), (7,8), and (10,8) are not used to carry NR PDSCH, so in the method provided in the embodiment of the present application, NR PDSCH may be rate-matched based on LTE CRS on the ninth OFDM symbol and the tenth OFDM symbol in the resource grid shown in fig. 2.

Taking the first SCS to be 30kHz and the second SCS to be 15kHz as an example, if the PDSCH is repeatedly transmitted on the ninth OFDM symbol and the tenth OFDM symbol in the resource grid shown in fig. 14, the frequency spectrum of the PDSCH on the ninth OFDM symbol can refer to fig. 13B. In fig. 13B, solid unidirectional arrows indicate subcarriers for carrying information of the PDSCH. Since on the ninth OFDM symbol in fig. 14, REs (1,8), (4,8), (7,8), and (10,8) are REs that can be used to carry PDSCH. Therefore, in fig. 13B, subcarrier #1, subcarrier #4, subcarrier #7, and subcarrier #10 are indicated by solid one-way arrows, compared to fig. 13A. Optionally, with respect to fig. 2, in the method provided in the embodiment of the present application, NR PDSCH does not need to be rate-matched based on LTE CRS on the ninth OFDM symbol and the tenth OFDM symbol in the resource grid shown in fig. 2, for example, as shown in fig. 14. In fig. 14, black squares indicate REs to which NR PDSCH is not mapped, i.e., REs to which NR PDSCH needs to be rate-matched based on LTE CRS. Fig. 14 has more available RE resources and requires fewer RE resources for rate matching than fig. 2.

As can be seen from fig. 13A or fig. 13B, with the method provided in this embodiment of the present application, since the 30kHz subcarrier spacing signal is set to 0 at the position where the corresponding odd-numbered 15kHz subcarrier is located, the 30kHz subcarrier spacing signal does not affect the reference signal carried by the odd-numbered 15kHz subcarrier (e.g., the LTE CRS carried by the odd-numbered 15kHz subcarrier). From the above method, it can be understood by those skilled in the art that when the subcarrier spacing is numbered from 1 (other odd numbers are also possible) in the frequency domain, the signal of the 30kHz subcarrier spacing is set to 0 at the position where the corresponding even numbered 15kHz subcarrier is located in fig. 13A or fig. 13B.

From the above analysis it can be seen that since the signal of the first SCS does not correspond to a number of 2ⁿThe integer multiple of the second sub-carrier is located at 0. Thus, in the shared spectrum, the signal of the first SCS does not affect the corresponding number other than 2ⁿAn integer multiple of the second subcarrier signal. In other words, in the shared spectrum, the subcarrier number is not 2ⁿOn the REs corresponding to the integer multiple of the second SCS, the reference signal (e.g. LTE CRS) of the second SCS is not affected by the signal (e.g. NR PDSCH) of the first SCS. For example, in the shared spectrum, the first SCS is 60kHz and the second SCS is 15kHz, the signal value of the first SCS is equal to 0 at the position corresponding to the second subcarrier with the

number

1, 2, 3 or other numbers not equal to integer multiples of 4.

To further reduce the first SCS in the shared spectrumThe signals of the first SCS require rate matching on the resources corresponding to the signals of the second SCS due to mutual interference between the signals and the signals of the second SCS. In the scheme of the present application, 2ⁿOn each first OFDM symbol, any RE in the first RE set corresponding to each first OFDM symbol is not used for mapping the PDSCH, and the first RE set and the second RE set have overlapping portions in the frequency domain. And said 2ⁿ1 second OFDM symbol, in which the first OFDM symbols are aligned in the time domain, is used for transmitting a reference signal corresponding to a second SCS, and includes: in the 1 second OFDM symbol, the REs in the second RE set are used for mapping reference signals corresponding to the second SCS. Optionally, the first RE set may be defined within one OFDM symbol, or may be defined within a plurality of OFDM symbols. For example, the first RE set includes 2ⁿREs not used for mapping the PDSCH on the first OFDM symbol, e.g., REs not used for mapping the PDSCH in resource blocks of the first set of REs including one slot and one RB.

It should be noted that, the overlapping portion of the first RE set and the second RE set in the frequency domain means: there is an overlapping portion between one RE in the first RE set and at least one RE in the second RE set in the frequency domain. Or, there is an overlapping portion between one RE in the second RE set and at least one RE in the second RE set in the frequency domain.

The case where there is an overlapping portion between one RE and another RE in the frequency domain can be described with reference to fig. 1 and 2. As can be seen from fig. 1 and 2, there is an overlapping portion of the RE indexed by (0,0) in fig. 1 and the RE indexed by (0,0) or (0,1) in fig. 2 in the frequency domain. There is an overlapping portion of the RE indexed by (3,4) in fig. 1 and the RE indexed by (1,8) or (1,9) in fig. 2 in the frequency domain.

It can be understood that, since the first RE set and the second RE set have an overlapping portion in the frequency domain, the REs included in the first RE set may be determined according to the REs included in the second RE set. Alternatively, the locations of REs in the first set of REs may be determined according to the locations of REs in the second set of REs.

Optionally, for one second OFDM symbol, the second RE set is a subset of the third RE set. The third RE set corresponding to the second OFDM symbol includes all REs used for carrying reference signals on the second OFDM symbol. For example, referring to fig. 1, the third RE set corresponding to OFDM symbol #0 may be { (0,0), (6,0), (12,0), (18,0) }.

In one implementation, for one second OFDM symbol, any one RE in the third RE set belongs to the second RE set. That is, the second RE set is equal to the third RE set.

Illustratively, referring to fig. 1 and 2, the second OFDM symbol #0 in fig. 1 is aligned with the first OFDM symbol #0 and the first OFDM symbol #1 in fig. 2 in the time domain, and the second OFDM symbol #4 in fig. 1 is aligned with the first OFDM symbol #8 and the first OFDM symbol #9 in fig. 2 in the time domain. The third RE set corresponding to the second OFDM symbol #4 includes RE { (3,4), (9,4), (15,4), (21,4) }, and the third RE set corresponding to the second OFDM symbol #0 includes RE { (0,0), (6,0), (12,0), (18,0) }. The second set of REs is equal to the third set of REs. Thus, the first RE set to which the first OFDM symbol #8 and the first OFDM symbol #9 correspond includes RE { (1,8), (4,8), (7,8), (10,8), (1,9), (4,9), (7,9), (10,9) }, and the first RE set to which the first OFDM symbol #0 and the first OFDM symbol #1 correspond includes RE { (0,0), (3,0), (6,0), (9,0), (0,1), (3,1), (6,1), (9,1) }.

As another implementation, for one second OFDM symbol, a part of REs in the third RE set belongs to the second RE set.

According to the method provided by the embodiment of the application, the PDSCH is in 2ⁿIs repeatedly transmitted on the first OFDM symbol, so the sub-carrier number on the PDSCH and the second OFDM symbol is not 2ⁿThe reference signals carried on the integer multiples of REs do not interfere with each other. Therefore, the PDSCH only needs to number 2 for the subcarrier on the second OFDM symbolⁿInteger multiple of and used to carry the RE of the reference signal for rate matching. Based on this consideration, the subcarrier number in the third RE set is 2ⁿREs of integer multiples of (d) belong to the second RE set. Thus, the RE in the second RE set has subcarrier number 2ⁿInteger multiples of. It can be understood that, in this case, the number of subcarriers of REs in the first RE set is 2ⁿIs equal to the number of one RE in the second set of REs.

Illustratively, referring to fig. 1 and 14, the second OFDM symbol #0 in fig. 1 is aligned with the first OFDM symbol #0 and the first OFDM symbol #1 in fig. 2 in the time domain, and the second OFDM symbol #4 in fig. 1 is aligned with the first OFDM symbol #8 and the first OFDM symbol #9 in fig. 2 in the time domain. The third RE set corresponding to the second OFDM symbol #4 includes RE { (3,4), (9,4), (15,4), (21,4) }, and the third RE set corresponding to the second OFDM symbol #0 includes RE { (0,0), (6,0), (12,0), (18,0) }. Assume subcarrier number 2 in the third RE setⁿAn integer multiple of REs belongs to the second RE set, and n is equal to 1. Since the subcarrier number of none of the REs { (3,4), (9,4), (15,4), (21,4) } corresponding to the second OFDM symbol #4 is an integer multiple of 2, the REs { (4,3), (4,9), (4,15), (4,21) } corresponding to the second OFDM symbol #4 are not included in the second RE set, i.e., the second RE set corresponding to the second OFDM symbol #4 is an empty set, so that the first RE set corresponding to the first OFDM symbol #8 and the first OFDM symbol #9 is an empty set. In the third RE set corresponding to the second OFDM symbol #0, the numbers of the subcarriers of REs (0,0), (6,0), (12,0), (18,0) are all integer multiples of 2, and thus the second RE set corresponding to the second OFDM symbol #0 includes RE { (0,0), (6,0), (12,0), (18,0) }. Thus, the first RE set corresponding to the first OFDM symbol #0 and the first OFDM symbol #1 includes RE { (0,0), (3,0), (6,0), (9,0), (0,1), (3,1), (6,1), (9,1) }.

In this embodiment, the second RE set and the third RE set may be defined in a second SCS slot range, or may be defined in a second SCS symbol range, and this embodiment is not limited in this application. In the embodiment of the present application, the first OFDM symbol and the second OFDM symbol are respectively used to describe a type of signal. In the time domain of a block of time-frequency resources, one or more groups 2 may be includedⁿThe first OFDM symbol, which is not limited in this embodiment.

S102, the terminal receives the PDSCH from the network device using the first SCS.

Optionally, step S102 may also be expressed as: the terminal receives a PDSCH corresponding to the first SCS from the network equipment.

As an implementation, when PDSCH is on2ⁿThe terminal may repeat the transmission on the first OFDM symbol by 2ⁿThe PDSCH is received on the first OFDM symbol. By the method, the gain of the PDSCH received by the terminal can be improved.

As another implementation, when PDSCH is at 2ⁿWhen the transmission is repeated on the first OFDM symbol, the terminal is at 2ⁿReceiving PDSCH on a first OFDM symbol of the first OFDM symbols, not at 2ⁿThe PDSCH is received on a non-first one of the first OFDM symbols. The method is beneficial to simplifying the process of receiving the PDSCH by the terminal.

As another implementation, when PDSCH is at 2ⁿWhen the transmission is repeated on the first OFDM symbol, the terminal is at 2ⁿReceiving PDSCH on at least one first OFDM symbol of the first OFDM symbols, not at 2ⁿAnd receiving the PDSCH on the OFDM symbols except the at least one first OFDM symbol in the first OFDM symbols. The method is beneficial to simplifying the process of receiving the PDSCH by the terminal. The at least one first OFDM symbol may be the 2ⁿAny at least one of the first OFDM symbols may have a continuous or discrete position in the time domain, which is not limited in this embodiment. For example, the at least one symbol may be the first two symbols, the last symbol, or possibly other.

The steps S101 and S102 are not only applicable to transmission and reception of the PDSCH, but also applicable to transmission and reception of other downlink channels or downlink signals such as the PDCCH and the DMRS. Optionally, the steps S101& S102 are not only applicable to transmission and reception of downlink PDSCH signals, but also can be extended to transmission and reception of uplink signals.

Optionally, the method further comprises: and pre-configuring or signaling the network equipment to configure the resource position of the third RE set or the second RE set for the terminal. Semi-static signaling may also be referred to as higher layer signaling. In the embodiment of the present application, the signaling may be semi-static signaling and/or dynamic signaling.

In the embodiment of the present application, the semi-static signaling may be Radio Resource Control (RRC) signaling, a broadcast message, a system message, or a Medium Access Control (MAC) Control Element (CE). The broadcast message may include a Remaining Minimum System Information (RMSI).

In the embodiment of the present application, the dynamic signaling may be physical layer signaling. The physical layer signaling may be signaling carried by a physical control channel or signaling carried by a physical data channel. The physical data channel may be a downlink channel, such as a PDSCH. The physical control channel may be a PDCCH, an Enhanced Physical Downlink Control Channel (EPDCCH), a Narrowband Physical Downlink Control Channel (NPDCCH), or a machine type communication physical downlink control channel (MTC) MPDCCH. The signaling carried by the PDCCH or EPDCCH may also be referred to as Downlink Control Information (DCI). The physical control channel may also be a physical sidelink control channel (physical sidelink control channel), and signaling carried by the physical sidelink control channel may also be referred to as Sidelink Control Information (SCI).

The resource location where the third RE set is configured may be a resource location where a reference signal of the second SCS is configured for the terminal. The resource location where the reference signal for configuring the second SCS for the terminal is located may refer to a manner of configuring the resource location of the reference signal for the terminal in LTE 36.211 and 36.331, or refer to a manner of configuring the resource location of the reference signal for the terminal in NR 38.211 and 38.331, or may refer to another manner of configuring the resource location of the reference signal, which is not limited in the embodiment of the present application. The reference signal may be various possible reference signals, such as CRS, DMRS, or the like. The protocol version of LTE or the protocol version of NR does not limit the application scope of the embodiment of the present application, and for example, the configuration manner of the resource location of the reference signal described in the protocol version formulated in the future may also use the embodiment of the present application.

The resource location for configuring the second RE set for the terminal device may be a location of a second OFDM symbol where the REs in the second RE set are configured, and a location of a subcarrier where the REs in the second RE set in the symbol are configured. Wherein, for the position of the second OFDM symbol where the RE in the second RE set is located and the position of the subcarrier where the RE in the second RE set is located in the symbol, any one of the two may be preconfigured, and the other is configured for the terminal by the network device through signaling; or both are preconfigured; or both are configured for the terminal by the network device through signaling.

The signaling for configuring the resource location of the third RE set or the second RE set may be referred to as resource configuration information. Optionally, the resource configuration information is used to configure time domain resources and/or frequency domain resources of the reference signal corresponding to the second SCS.

Take the example that a third RE set and the first second RE set are defined on a second SCS symbol. In one implementation, the resource configuration information is used to indicate a location of each RE in the fourth RE set. The fourth RE set includes REs on the N second OFDM symbols for carrying reference signals corresponding to the second SCS, that is, the fourth RE set includes N third RE sets. N is a positive integer. It will be understood by those skilled in the art that, when the third RE set is defined on the N second OFDM symbols, that is, the third RE set includes REs of reference signals on the N second OFDM symbols, the resource configuration information is used to indicate that the position of each RE in the fourth RE set is equivalent to: the resource configuration information is used to indicate a location of each RE in the third RE set.

Taking fig. 1 as an example, the fourth RE set is RE { (0,0), (6,0), (12,0), (18, 0); (3,4), (9,4), (15,4), (21, 4); (0,0), (6,7), (12,7), (18, 7); (3,11), (9,11), (15,11), (21, 11); }.

The terminal can determine the location of the second OFDM symbol based on the resource configuration information. For example, if the third RE set indicated by the resource allocation information is { (0,0), (2,1), (4,5) }, the terminal may determine that there are REs on OFDM symbol #0, OFDM symbol #1, and OFDM symbol #5 carrying the reference signal corresponding to the second SCS, that is, OFDM symbol #0, OFDM symbol #1, and OFDM symbol #5 are used to send the reference signal corresponding to the second SCS. Thus, the terminal can determine that OFDM symbol #0, OFDM symbol #1, and OFDM symbol #5 are all the second OFDM symbol.

Further, the terminal may determine the N third RE sets based on the resource configuration information. For example, if the fourth RE set indicated by the resource allocation information is { (0,0), (6,0), (12,0), (18, 0); (3,4), (9,4), (15,4), (21, 4); (0,7), (6,7), (12,7), (18, 7); (3,11), (9,11), (15,11), (21, 11); taking the example that all REs in the third RE set belong to the second RE set, the terminal can determine that the third RE set corresponding to the OFDM symbol #0 is { (0,0), (6,0), (12,0), (18,0) }, the third RE set corresponding to the OFDM symbol #4 is { (3,4), (9,4), (15,4), (21,4) }, the third RE set corresponding to the OFDM symbol #7 is { (0,7), (6,7), (12,7), (18,7) }, and the third RE set corresponding to the OFDM symbol #11 is { (3,11), (9,11), (15,11), (21,11) }.

After determining the N third RE sets, the terminal may determine, according to a third RE set corresponding to one second OFDM symbol, a second RE set corresponding to the second OFDM symbol. And partial REs in the third RE set belong to the second RE set, namely the second RE set comprises subcarriers with the subcarrier number of 2 in the third RE setⁿFor example, if n is 1, assuming that the third RE set corresponding to OFDM symbol #4 is { (3,4), (9,4), (15,4), (21,4) }, then the second RE set corresponding to OFDM symbol #4 is an empty set. Alternatively, assuming that the third RE set corresponding to the OFDM symbol #7 is { (0,7), (6,7), (12,7), (18,7) }, the second RE set corresponding to the OFDM symbol #7 is { (0,7), (6,7), (12,7), (18,7) }.

After determining the second RE set corresponding to the second OFDM symbol, the terminal may determine 2 according to the second RE set corresponding to the second OFDM symbolⁿA first set of REs corresponding to the first OFDM symbol. For example, the second OFDM symbol #0 aligns the first OFDM symbol #0 and the first OFDM symbol #1 in the time domain, and if the second RE set corresponding to the second OFDM symbol #0 is { (0,0), (6,0), (12,0), (18,0) }, the first RE set corresponding to the first OFDM symbol #0 and the first OFDM symbol #1 is { (0,0), (3,0), (6,0), (9, 0); (0,1), (3,1), (6,1), (9, 1); }.

That is, when the resource configuration information is used to indicate a position of each RE in the third RE set, the resource configuration information is used to indirectly indicate a position of at least one second OFDM symbol; and for each second OFDM symbol, the resource configuration information is further used to indirectly indicate the position of the RE in the second RE set corresponding to the OFDM symbol.

Optionally, the resource configuration information is used to indicate a location of each RE in the fourth RE set, and includes one of the following situations:

case one, the resource configuration information is used to indicate an index of each RE in the fourth RE set.

And in case two, the resource configuration information is used to indicate an index of a resource pattern (pattern). Wherein the resource pattern is of RB granularity, or of RB granularity in frequency domain and of slot granularity in time domain, and is used for indicating a location of an RE carrying a reference signal in the resource grid. For example, the resource pattern may be as shown with reference to fig. 15.

Optionally, the resource configuration information includes: bandwidth, number of antenna ports, offset value, center position of carrier.

It should be noted that there is a preset corresponding relationship between the number of antenna ports and the resource pattern. Taking the reference signal as CRS for example, when the number of antenna ports is 1, the corresponding resource pattern may refer to fig. 15; when the number of antenna ports is 2, the corresponding resource pattern can refer to fig. 16; when the number of antenna ports is 4, the corresponding resource pattern may refer to fig. 17.

The offset value is used to indicate a cyclic shift of REs carrying reference signals in the frequency domain. For example, taking an offset value of 1 and the number of antenna ports as an example, after the REs carrying the reference signals in the resource pattern shown in fig. 15 are cyclically moved in the frequency domain, the positions of the REs carrying the reference signals in the resource grid can refer to fig. 18.

As one implementation, the offset value is ID_cellmod 6. Wherein, ID_cellIndicating the identity of the physical cell.

Therefore, the terminal determines the bandwidth size and the position of the frequency domain resource through the bandwidth and the central position of the carrier; and the terminal determines the corresponding resource pattern according to the number of the antenna ports; then, the terminal determines the positions of all REs carrying the reference signal in the resource grid according to the offset value and the resource pattern, that is, determines a fourth RE set for carrying the reference signal in the resource grid corresponding to the second SCS.

The above is merely an example of the resource configuration information, and the embodiment of the present application is not limited thereto.

Optionally, when the network device and the terminal transmit the NR PDSCH, the method provided in the embodiment of the present application further includes: and the network equipment sends the scheduling information of the PDSCH to a terminal. Correspondingly, the terminal receives the scheduling information of the PDSCH.

Wherein the scheduling information of the PDSCH is carried in DCI. For the introduction of DCI, reference may be made to NR 38.212 and LTE 36.212, or reference may be made to other DCI formats, and the embodiments of the present application are not limited.

The scheduling information of the PDSCH is used for indicating a modulation mechanism of the PDSCH, and the code rate of the PDSCH indicated by the modulation mechanism is smaller than a first threshold value.

Optionally, the first threshold is related to a number M of N, N OFDM symbols included in a slot of one first SCS for repeatedly transmitting PDSCH ISI reducing interference, and the first threshold may be smaller than or equal to (N-M)/N. For example, one slot of the first SCS of 30kHz as shown in fig. 2 includes 14 OFDM symbols, where symbols #1 and #9 of the 14 OFDM symbols are used for repeated transmission to reduce ISI interference, so the first threshold may be less than or equal to 12/14; the first threshold equivalent spectral efficiency is equal to the first threshold multiplied by the modulation order used by the PDSCH. Optionally, the N may also be represented as the number of OFDM symbols mapped by the PDSCH in the time domain; the M may also be expressed as the number of OFDM symbols for repeated transmission among the N symbols of the PDSCH transmission.

Optionally, the first threshold is related to a number M of OFDM symbols N, N contained in a slot of one first SCS for repeatedly transmitting PDSCH ISI reducing interference, a number N1 of RBs of the first SCS overlapping or shared with a second SCS or a number N2 of RBs solely shared by the first SCS in BWP of the first SCS, and the first threshold may be less than or equal to [ N (N1+ N2) - (N-M) × N1]/[ N (N1+ N2) ], for example, 14 OFDM symbols are included in one slot of the first SCS 30kHz shown in fig. 2, where symbols #1 and #9 of the 14 OFDM symbols are used for repeatedly transmitting ISI reducing interference, and further assuming that the number N1 of RBs shared in BWP of the first SCS is equal to 10 and the number N2 of RBs shared is equal to 10, so the first threshold may be less than or equal to 13/14; the first threshold equivalent spectral efficiency is equal to the first threshold multiplied by the modulation order used by the PDSCH. Optionally, the N may also be represented as the number of OFDM symbols mapped by the PDSCH in the time domain; the M may also be expressed as the number of OFDM symbols for repeated transmission among the N symbols of the PDSCH transmission; the N1 may also be expressed as the number of RBs of the shared first SCS to which the PDSCH is mapped on the frequency domain; the N2 may also be expressed as the number of RBs of the first SCS shared exclusively mapped on the frequency domain by the PDSCH.

Optionally, the scheduling information of the PDSCH is used to indicate a modulation mechanism of the PDSCH, and includes: the scheduling information of the PDSCH is used to indicate an index of a Modulation and Coding Scheme (MCS).

The MCS is used to indicate a modulation scheme and a coding scheme. Illustratively, there is a preset corresponding relationship between the index of the MCS, the modulation order, the code rate and the spectrum efficiency, see table 4. In table 4, when the index of MCS is 29, 30 or 31, the code rate and spectral efficiency are reserved (reserved).

TABLE 4

Optionally, the scheduling information of the PDSCH is used to indicate time-frequency resources occupied by the PDSCH. For example, the scheduling information of the PDSCH is also used to indicate RBs occupied by the PDSCH on BWP of the terminal. Specifically, the PDSCH is used to indicate the starting position of RBs occupied by the PDSCH on the BWP of the terminal, and the number of RBs.

How the BWP of the terminal is determined can be referred to the above description of BWP, and is not described herein again.

The above-mentioned scheme provided by the embodiments of the present application is introduced mainly from the perspective of interaction between network elements. It is understood that each network element, such as the network device and the terminal, for implementing the above functions, includes a corresponding hardware structure or software module or a combination of both for performing the functions. Those of skill in the art would readily appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as hardware or combinations of hardware and computer software. Whether a function is performed as hardware or computer software drives hardware depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

Fig. 19 is a schematic structural diagram of an apparatus 1000 according to an embodiment of the present application. The apparatus 1000 may be a terminal or a network device, and may implement the method provided in the embodiment of the present application; the apparatus 1000 may also be an apparatus capable of supporting a terminal or a network device to implement the method provided in the embodiments of the present application, and the apparatus 1000 may be installed in the terminal or the network device. The apparatus 1000 may be a hardware structure, a software module, or a hardware structure plus a software module. The apparatus 1000 may be implemented by a system-on-chip.

The device 1000 includes a processing module 1001 and a communication module 1002. The processing module 1001 may generate information for transmission and may transmit the information using the communication module 1002. The processing module 1002 may receive information using the communication module 1001 and process the received information. The processing module 1001 and the communication module 1002 are coupled.

The coupling in the embodiments of the present application is an indirect coupling or connection between devices, units or modules, which may be in an electrical, mechanical or other form, and is used for information interaction between the devices, units or modules. The coupling may be a wired connection or a wireless connection.

In this embodiment, the communication module may be a circuit, a module, a bus, an interface, a transceiver, or other devices that can implement a transceiving function, and this embodiment is not limited in this application.

Fig. 20 is an exemplary diagram of an apparatus 2000 for implementing a function of a network device or a terminal according to an embodiment of the present application.

In one possible implementation, the apparatus 2000 is used to implement the functions of a network device.

The apparatus 2000 includes at least one processor 2001 and a communication interface 2002. The processor 2001 is used for implementing the functions of the network device in the method provided by the embodiment of the present application, and the communication interface 2002 is used for communication between the apparatus and other devices (such as a terminal).

Optionally, the apparatus 2000 may include a memory 2003. Optionally, the memory 2003 may be included in the processor 2001. The processor 2001, the communication interface 2002, and the memory 2003 may communicate with each other through an internal connection path (e.g., a bus). The memory 2003 is used for storing instructions, and the processor 2001 executes the instructions stored in the memory 2003, so that the apparatus 2000 implements the functions of the network device in the method provided by the embodiment of the present application.

The apparatus 2000 may be a network device, a circuit, or a system on chip (SoC), and the embodiments of the present application are not limited thereto.

In one possible implementation, the apparatus 2000 is used to implement the functions of a terminal.

The apparatus 2000 includes at least one processor 2001 and a communication interface 2002. The processor 2001 is used for implementing the functions of the terminal in the method provided by the embodiment of the application, and the communication interface 2002 is used for communication between the device and other equipment (such as network equipment).

Optionally, the apparatus 2000 may include a memory 2003. Optionally, the memory 2003 may be included in the processor 2001. The processor 2001, the communication interface 2002, and the memory 2003 may communicate with each other through an internal connection path (e.g., a bus). The memory 2003 is used for storing instructions, and the processor 2001 executes the instructions stored in the memory 2003, so that the apparatus 2000 implements the functions of the terminal in the method provided by the embodiment of the present application.

The apparatus 2000 may be in various possible forms such as a terminal, a circuit, or a SoC, and the embodiments of the present application are not limited thereto.

In the embodiments of the present application, the processor may be a general purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, discrete gate or transistor logic, discrete hardware components. A general purpose processor may be a microprocessor, or any form of processor, etc.

In the embodiment of the present application, the communication interface may be a circuit, a module, a bus interface, a transceiver, or other devices or modules that can implement a communication function.

In the embodiment of the present application, the memory may be a nonvolatile memory, such as a Hard Disk Drive (HDD) or a solid-state drive (SSD), and may also be a volatile memory, such as a random-access memory (RAM). Alternatively, the memory may be, but is not limited to, any other medium used to carry or store program code in the form of instructions or data structures and capable of being accessed by a computer. The memory in the embodiments of the present application may also be circuitry or any other device capable of performing a storage function for storing program instructions and/or data.

In the embodiment of the device of the present application, the module division of the device is a logic function division, and there may be another division manner in actual implementation. For example, each functional module of the apparatus may be integrated into one module, each functional module may exist alone, or two or more functional modules may be integrated into one module.

The method provided by the embodiment of the present application may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When loaded and executed on a computer, cause the processes or functions described in accordance with the embodiments of the invention to occur, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a computer network, a network appliance, a terminal, or other programmable apparatus. The computer instructions may be stored on a computer readable storage medium or transmitted from one computer readable storage medium to another, for example, from one website, computer, server, or data center to another website, computer, server, or data center via wire (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device, such as a server, a data center, etc., that incorporates one or more of the available media. The usable medium may be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., Digital Video Disk (DVD)), or a semiconductor medium (e.g., SSD), among others.

In the embodiments of the present application, the embodiments may refer to each other, for example, methods and/or terms between the embodiments of the method may refer to each other, for example, functions and/or terms between the embodiments of the apparatus and the embodiments of the method may refer to each other, without logical contradiction. While the present application has been described in connection with various embodiments, other variations to the disclosed embodiments can be understood and effected by those skilled in the art from a review of the drawings, the disclosure, and the appended claims. In the claims, the word "comprising" does not exclude other elements or steps. A single processor or other unit may fulfill the functions of several items recited in the claims. The mere fact that certain measures are recited in mutually different dependent claims does not indicate that a combination of these measures cannot be used to advantage.

The above embodiments are only used to illustrate the technical solutions of the present application, and are not used to limit the protection scope thereof. All modifications, equivalents, improvements and the like based on the technical solutions of the present application should be included in the protection scope of the present application.

Claims

1. A method for transmitting a data channel, the method comprising:

receiving a Physical Downlink Shared Channel (PDSCH) by using a first subcarrier interval (SCS); wherein the PDSCH is in 2ⁿIs repeatedly transmitted on a first OFDM symbol, 2ⁿAligning a first OFDM symbol and a second OFDM symbol in time domain, wherein the first OFDM symbol and the second OFDM symbol are used for transmitting a reference signal corresponding to a second SCS, and the first SCS is 2 of the second SCSⁿMultiple, where n is a positive integer.

2. Method for transmitting a data channel according to claim 1, characterized in that for said 2ⁿA first OFDM symbol, when n is 1, a first OFDM symbol of the two first OFDM symbols including a cyclic prefix, and a second first OFDM symbol including a cyclic suffix.

3. Method for transmitting data channel according to claim 1, characterized in that said 2ⁿThe data of the PDSCH transmitted on the ith first OFDM symbol in the first OFDM symbols is obtained after the phase rotation processing of the corresponding frequency domain signal, i is more than 1 and less than or equal to 2ⁿIs an integer of (1).

4. Method for transmitting a data channel according to claim 3, characterized in that in said 2ⁿOn a first OFDM symbol, the REs in the first RE set are not used for mapping the PDSCH, and the first RE set and the second RE set have an overlapping part in a frequency domain;

the 1 second OFDM symbol is used for transmitting a reference signal corresponding to the second SCS, and includes: in the 1 second OFDM symbol, the REs in the second RE set are used for mapping reference signals corresponding to the second SCS.

5. The method according to claim 4, wherein the first RE set has a sub-carrier number of 2ⁿIs equal to one R in the second RE setE subcarrier number.

6. The method for transmitting data channel according to any of claims 1 to 5, wherein the receiving PDSCH comprises:

in said 2ⁿReceiving the PDSCH on a first one of first OFDM symbols.

7. The method for transmitting data channel according to any of claims 1 to 5, further comprising:

receiving resource configuration information, wherein the resource configuration information is used for determining the position of the second OFDM symbol.

8. The transmission method of data channel of claim 7, wherein the resource configuration information is further used to determine the location of the RE in the second RE set.

9. A method for transmitting a data channel, comprising:

sending a Physical Downlink Shared Channel (PDSCH) by using a first subcarrier interval (SCS); wherein the PDSCH is in 2ⁿIs repeatedly transmitted on a first OFDM symbol, 2ⁿAligning a first OFDM symbol and a second OFDM symbol in time domain, wherein the first OFDM symbol and the second OFDM symbol are used for transmitting a reference signal corresponding to a second SCS, and the first SCS is 2 of the second SCSⁿMultiple, where n is a positive integer.

10. Method for transmitting a data channel according to claim 9, characterized in that for said 2ⁿA first OFDM symbol, when n is 1, a first OFDM symbol of the two first OFDM symbols including a cyclic prefix, and a second first OFDM symbol including a cyclic suffix.

11. Method for transmitting data channel according to claim 9, characterised in that said 2ⁿA first oneThe data of PDSCH transmitted on the ith first OFDM symbol in the OFDM symbols is obtained after the phase rotation processing of the corresponding frequency domain signal, i is more than 1 and less than or equal to 2ⁿIs an integer of (1).

12. Method for transmitting a data channel according to one of claims 9 to 11, characterized in that in said 2ⁿOn a first OFDM symbol, the REs in the first RE set are not used for mapping the PDSCH, and the first RE set and the second RE set have an overlapping part in a frequency domain;

13. The method of claim 12, wherein the first RE set has a subcarrier number of 2 for one REⁿIs equal to the subcarrier number of one RE in the second set of REs.

14. The method for transmitting data channel according to any of claims 9 to 11, wherein the method further comprises:

and sending resource configuration information, wherein the resource configuration information is used for indicating the position of the second OFDM symbol.

15. The transmission method of data channel of claim 14, wherein the resource configuration information is further used for indicating the positions of the REs in the second RE set.

16. A transmission apparatus for a data channel, characterized by being adapted to implement a transmission method for a data channel according to any one of claims 1 to 8, or adapted to implement a transmission method for a data channel according to any one of claims 9 to 15.

17. A transmission apparatus for a data channel, comprising: a processor and a memory, the memory coupled to the processor, the processor configured to perform the transmission method for the data channel of any of claims 1 to 8 or configured to perform the transmission method for the data channel of any of claims 9 to 15.

18. A computer-readable storage medium comprising instructions which, when executed on a computer, cause the computer to perform the transmission method for a data channel of any one of claims 1 to 8, or cause the computer to perform the transmission method for a data channel of any one of claims 9 to 15.