CN111435892B

CN111435892B - Method and device for receiving data

Info

Publication number: CN111435892B
Application number: CN201910028473.5A
Authority: CN
Inventors: 刘显达; 刘鹍鹏; 张旭; 周永行
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2019-01-11
Filing date: 2019-01-11
Publication date: 2021-11-19
Anticipated expiration: 2039-01-11
Also published as: WO2020143743A1; CN111435892A

Abstract

The application provides a method and a device for receiving data, which can improve the data demodulation performance of terminal equipment. The method comprises the following steps: the terminal equipment receives first resource indication information, wherein the first resource indication information is used for indicating the information that the time-frequency resource occupied by each code word in at least one code word is preempted; and the terminal equipment processes each code word in the at least one code word according to the first resource indication information.

Description

Method and device for receiving data

Technical Field

The present application relates to the field of wireless communication technologies, and in particular, to a method and an apparatus for receiving data.

Background

In New Radio (NR), ultra-reliable low latency communications (URLLC) have high requirements for low latency. From the network side, the network device dynamically allocates the time-frequency resources of the network to the URLLC users and enhanced mobile broadband (eMBB) users in real time according to the scheduling conditions of the network device and the requirements of the users served by the network device. That is, for a certain time-frequency resource of the network, it may be allocated to either URLLC users or eMBB users, mainly depending on the needs of the users and the scheduling of the base station.

However, after the base station allocates a certain time-frequency resource to the eMBB user, the base station may receive a scheduling request of the URLLC user, and due to the requirement of the URLLC user for low delay, the base station may temporarily schedule the time-frequency resource already allocated to the eMBB user to the URLLC user. For an eMBB user, it can be said that time-frequency resources are preempted. Meanwhile, since the condition that the time-frequency resources are preempted cannot be known in advance, the base station cannot inform the eMBB user of the condition that the time-frequency resources are preempted in advance. Therefore, the eMBB user can think that the data still transmitted on the time-frequency resource which is actually preempted by the URLLC user is own data, and can still perform operations such as demodulation and caching on the data transmitted on the preempted time-frequency resource, so that the problems of cache pollution and data demodulation performance reduction are caused. For this reason, a pre-Preemption Indication (PI) field is introduced into the NR, where the PI field is carried in cell common Downlink Control Information (DCI), and the PI field is used to indicate a time-frequency resource position that an eMBB user is preempted before carrying signaling of the PI field. And the eMBB user adjusts the demodulation and caching operations of the data according to the PI field so as to ensure the demodulation performance of the data.

In a coordinated multiple point transmission (CoMP) scenario, a plurality of transmission points (TRPs) may serve one User Equipment (UE) at the same time, and the situation that the UE receives data becomes more flexible. For example, a serving TRP among the plurality of TRPs may schedule a UE to receive data through one DCI for scheduling data, or may schedule a UE to receive data through two DCIs. The TRP may indicate that the UE enables one codeword or possibly two codewords. The data of the UE may be delivered by the serving TRP (or serving base station), or may be delivered by cooperation of multiple TRPs.

In a multi-site cooperative transmission scenario, even though a PI field is introduced, in many specific scenarios, the UE still cannot determine the transmission behavior of the network side, so that it is often misjudged whether the time-frequency resources for sending downlink data by multiple TRPs are preempted. Therefore, the data demodulation performance of the UE is still low.

Disclosure of Invention

The application provides a method for receiving data and sending data, which can improve the data demodulation performance of terminal equipment in a multi-site transmission scene.

In a first aspect, the present application provides a method of receiving data, the method comprising: the method comprises the steps that terminal equipment receives first resource indication information, wherein the first resource indication information is used for indicating information that time-frequency resources occupied by each code word in at least one code word are occupied; and the terminal equipment processes each code word in the at least one code word according to the first resource indication information.

With reference to the first aspect, in certain implementations of the first aspect, the first resource indication information is used to indicate that time-frequency resources occupied by each of the at least one codeword are preempted, and the method includes: the first resource indication information is used for indicating whether a time-frequency resource set occupied by each code word in the at least one code word is preempted or not; or the first resource indication information is used to indicate that at least a part of time domain resources occupied by each of the at least one codeword is preempted.

With reference to the first aspect, in some implementations of the first aspect, the receiving, by the terminal device, the first resource indication information includes: the terminal equipment receives a first DCI, wherein the first DCI comprises the first resource indication information, the first resource indication information comprises a plurality of first fields, and each first field in the plurality of first fields corresponds to at least one code word; or each of the plurality of first fields corresponds to configuration information of at least one second DCI, where the at least one second DCI is respectively used to enable at least a part of the at least one codeword; or, each of the plurality of first fields corresponds to a set of control resources of at least one second DCI, where the at least one second DCI is respectively used to enable at least a portion of the at least one codeword.

With reference to the first aspect, in some implementations of the first aspect, the receiving, by the terminal device, the first resource indication information includes: the terminal equipment receives a first DCI, wherein the first DCI comprises a first field, the first field is used for bearing the first resource indication information, and the first field also carries code word indication information, and the code word indication information is index information of a code word associated with the at least one resource indication information; or, the codeword indication information is configuration information index value information of a third DCI, where the third DCI is used to enable at least a part of codewords in the at least one codeword; or, the codeword indication information is a control resource set index value of a third DCI, where the third DCI is used to enable at least a part of the at least one codeword.

With reference to the first aspect, in some implementations of the first aspect, the receiving, by the terminal device, the first resource indication information includes: the terminal equipment receives a plurality of first DCIs, wherein each first DCI in the plurality of first DCIs is used for carrying a part of information in the first resource indication information; wherein each first DCI in the plurality of first DCIs corresponds to at least one codeword in the at least one codeword; or, the plurality of first DCIs respectively correspond to configuration information index value information of a plurality of fourth DCIs, and the plurality of fourth DCIs are respectively used for enabling at least a part of the at least one codeword; or, the plurality of first DCIs respectively correspond to control resource set index values of a plurality of fourth DCIs, and the plurality of fourth DCIs are respectively used for enabling at least a part of the at least one codeword.

With reference to the first aspect, in certain implementations of the first aspect, the plurality of first DCIs are scrambled by different RNTI sequences.

With reference to the first aspect, in certain implementations of the first aspect, the at least one codeword is a plurality of codewords, and the plurality of codewords are located on the same carrier or in the same partial bandwidth; and/or the plurality of fourth DCIs are located on the same carrier or the same partial bandwidth; and/or the plurality of first DCIs are located on the same carrier or on the same partial bandwidth.

With reference to the first aspect, in certain implementations of the first aspect, the at least one codeword is a plurality of codewords, the receive beams of the plurality of codewords are different, and/or the quasi-co-location QCLs of the plurality of codewords are different; the receive beams of the plurality of first DCIs are different, and/or the quasi-co-location QCLs of the plurality of first DCIs are different.

In a second aspect, the present application provides a method of transmitting data, the method comprising: the network terminal equipment sends at least one code word to the terminal equipment; the network equipment determines that at least one part of the time frequency resources occupied by each code word in the at least one code word is preempted; and the network equipment sends first resource indication information to the terminal equipment, wherein the first resource indication information is used for indicating the information that the time-frequency resource occupied by each code word in the at least one code word is preempted.

With reference to the second aspect, in some implementations of the second aspect, the first resource indication information is used to indicate that time-frequency resources occupied by each of the at least one codeword are preempted, and the method includes: the first resource indication information is used for indicating whether the time-frequency resource occupied by each code word in the at least one code word is preempted or not; or the first resource indication information is used to indicate that at least a part of time domain resources occupied by each of the at least one codeword is preempted.

With reference to the second aspect, in some implementations of the second aspect, the sending, by the network device, the first resource indication information to the terminal device includes: the network equipment sends a first DCI to the terminal equipment, wherein the first DCI comprises the first resource indication information, the first resource indication information comprises a plurality of first fields, and each of the first fields corresponds to at least one code word; or each of the plurality of first fields corresponds to configuration information of at least one second DCI, where the at least one second DCI is respectively used to enable at least a part of the at least one codeword; or, each of the plurality of first fields corresponds to a set of control resources of at least one second DCI, where the at least one second DCI is respectively used to enable at least a portion of the at least one codeword.

With reference to the second aspect, in some implementations of the second aspect, the sending, by the network device, the first resource indication information to the terminal device includes: the network device sends a first DCI to the terminal device, where the first DCI includes a first field, the first field is used for carrying the first resource indication information, and the first field also carries codeword indication information, where the codeword indication information is index information of a codeword associated with the at least one resource indication information; or, the codeword indication information is configuration information index value information of a third DCI, where the third DCI is used to enable at least a part of the at least one codeword; or, the codeword indication information is a control resource set index value of a third DCI, where the third DCI is used to enable at least a part of the at least one codeword.

With reference to the second aspect, in some implementations of the second aspect, the sending, by the network device, the first resource indication information to the terminal device includes: the network equipment sends a plurality of first DCIs to the terminal equipment, wherein each first DCI in the plurality of first DCIs is used for carrying a part of information in the first resource indication information; wherein each first DCI in the plurality of first DCIs corresponds to at least one codeword in the at least one codeword; or, the plurality of first DCIs respectively correspond to configuration information index value information of a plurality of fourth DCIs, and the plurality of fourth DCIs are respectively used for enabling at least a part of the at least one codeword; or, the plurality of first DCIs respectively correspond to control resource set index values of a plurality of fourth DCIs, and the plurality of fourth DCIs are respectively used for enabling at least a part of the at least one codeword.

With reference to the second aspect, in certain implementations of the second aspect, the plurality of first DCIs are scrambled by different RNTI sequences.

With reference to the second aspect, in some implementations of the second aspect, the at least one codeword is a plurality of codewords, and the plurality of codewords are located on the same carrier or in the same partial bandwidth; and/or the plurality of fourth DCIs are located on the same carrier or the same partial bandwidth; and/or the plurality of first DCIs are located on the same carrier or on the same partial bandwidth.

With reference to the second aspect, in some implementations of the second aspect, the at least one codeword is a plurality of codewords, the transmit beams of the plurality of codewords are different, and/or the quasi-co-location QCLs of the plurality of codewords are different; the transmission beams of the plurality of first DCIs are different, and/or the quasi-co-location QCLs of the plurality of first DCIs are different.

In a third aspect, the present application provides an apparatus for receiving data, the apparatus having the functionality to implement the method in the first aspect and any possible implementation manner thereof. The functions can be realized by hardware, and the functions can also be realized by executing corresponding software by hardware. The hardware or software includes one or more units corresponding to the above functions.

In a fourth aspect, the present application provides an apparatus for transmitting data, the apparatus having the function of implementing the method in the second aspect and any possible implementation manner thereof. The functions can be realized by hardware, and the functions can also be realized by executing corresponding software by hardware. The hardware or software includes one or more units corresponding to the above functions.

In a fifth aspect, the present application provides a terminal device comprising a processor and a memory. The memory is configured to store a computer program, and the processor is configured to call and execute the computer program stored in the memory, so that the terminal device executes the method in the first aspect or any possible implementation manner of the first aspect.

Optionally, the terminal device further comprises a transceiver. Further optionally, the processor is one or more. The number of the memories is one or more.

In a sixth aspect, the present application provides a network device comprising a processor and a memory. The memory is used for storing the computer program, and the processor is used for calling and executing the computer program stored in the memory, so that the terminal device executes the method in the second aspect or any possible implementation manner of the second aspect.

Optionally, the network device further comprises a transceiver. Further optionally, the processor is one or more. The number of the memories is one or more.

Alternatively, the memory may be integrated with the processor, or may be provided separately from the processor.

The above-mentioned transceiver may comprise a receiver and/or a transmitter.

Optionally, the processor may be used for, but not limited to, baseband related processing, and the transceiver may be used for, but not limited to, radio frequency transceiving. The above devices may be respectively disposed on separate chips, or at least a part or all of the devices may be disposed on the same chip. For example, the transceiver includes a receiver and a transmitter, wherein the receiver and the transmitter may be provided on a receiver chip and a transmitter chip independent from each other, or may be integrated as a transceiver and then provided on a transceiver chip. As another example, the processor may be further divided into an analog baseband processor and a digital baseband processor. Wherein the analog baseband processor may be integrated with the transceiver on the same chip, and the digital baseband processor may be disposed on a separate chip.

In a seventh aspect, the present application provides a computer-readable storage medium having stored thereon computer instructions, which, when executed on a computer, cause the computer to perform the method of the first aspect or any possible implementation manner of the first aspect.

In an eighth aspect, the present application provides a computer-readable storage medium having stored thereon computer instructions which, when executed on a computer, cause the computer to perform the method of the second aspect or any possible implementation manner of the second aspect.

In a ninth aspect, the present application provides a chip comprising a processor. The processor is configured to read and execute the computer program stored in the memory to perform the method of the first aspect or any possible implementation manner of the first aspect.

Optionally, the chip further comprises a memory, and the memory and the processor are connected with the memory through a circuit or a wire.

Further optionally, the chip further comprises a communication interface.

In a tenth aspect, the present application provides a chip comprising a processor. The processor is adapted to read and execute the computer program stored in the memory to perform the method of the second aspect or any possible implementation manner of the second aspect.

Further optionally, the chip further comprises a communication interface.

In an eleventh aspect, the present application also provides a computer program product comprising computer program code which, when run on a computer, causes the computer to perform the method of the first aspect and any one of its possible implementations.

In a twelfth aspect, the present application further provides a computer program product comprising computer program code which, when run on a computer, causes the computer to perform the method of the second aspect and any one of its possible implementations.

According to the technical scheme, the network equipment sends the first resource indication information to the terminal equipment, and the first resource indication information is used for indicating that the time-frequency resource used by each code word in at least one code word sent to the terminal equipment by the network equipment is preempted. The terminal device can acquire the condition that the time-frequency resource occupied by each code word in the at least one code word is preempted according to the indication of the first resource indication information, so that correct demodulation and/or caching can be performed on the at least one code word, and the data demodulation performance of the terminal device can be improved.

Drawings

Fig. 1 is a schematic diagram of the correspondence between the search space set and CORESET.

Fig. 2 is a schematic diagram of scheduling data through one DCI in an ideal backhaul scenario.

Fig. 3 is another schematic diagram of scheduling data through one DCI in an ideal backhaul scenario.

Fig. 4 is a schematic diagram of scheduling data through 2 DCIs in an ideal backhaul scenario.

Fig. 5 is a diagram of eMBB user data punctured for transmitting URLLC user data.

Fig. 6 is a signaling design for pre-projection.

Fig. 7 is an indication manner of PI signaling.

Fig. 8 is another indication manner of PI signaling.

Fig. 9 is an example of the UE demodulating data according to the PI field.

Fig. 10 is another example of the UE demodulating data according to the PI field.

Fig. 11 is yet another example of the UE demodulating data according to PI signaling.

Fig. 12 is a schematic flow chart diagram of a method 100 of receiving data provided herein.

Fig. 13 is an example of establishing an association between a plurality of first fields and a plurality of codewords.

Fig. 14 is an example of association between a codeword and first resource indication information.

Fig. 15 is another example of association establishment between a codeword and first resource indication information.

Fig. 16 shows an example of the association between a plurality of codewords and a plurality of PI fields.

Fig. 17 is another example of establishing an association between multiple codewords and multiple PI signaling.

Fig. 18 is another example of establishing an association between multiple codewords and multiple PI signaling.

Fig. 19 (a) and (b) show one way to establish an association between multiple codewords and multiple PI signaling.

Fig. 20 shows another way of establishing association between multiple codewords and multiple PI signaling.

Fig. 21 is another way of associating multiple codewords with multiple PI fields.

FIG. 22 is a schematic block diagram of an apparatus 600 for receiving data provided herein

Fig. 23 is a schematic block diagram of an apparatus 800 for receiving data provided herein.

Fig. 24 is a schematic configuration diagram of a terminal device 7000 provided in the present application.

Fig. 25 is a schematic structural diagram of a network device 1000 provided in the present application.

Detailed Description

The technical solution in the present application will be described below with reference to the accompanying drawings.

The technical solution of the embodiment of the present application may be applied to various communication systems, including but not limited to: global system for mobile communications (GSM) systems, Code Division Multiple Access (CDMA) systems, Wideband Code Division Multiple Access (WCDMA) systems, General Packet Radio Service (GPRS), Long Term Evolution (LTE) systems, LTE Frequency Division Duplex (FDD) systems, LTE Time Division Duplex (TDD), universal mobile telecommunications system (universal mobile telecommunications system, UMTS), Worldwide Interoperability for Microwave Access (WiMAX) communication systems, future fifth generation (5G) or new radio NR systems, etc.

Terminal equipment in the embodiments of the present application may refer to user equipment, access terminals, subscriber units, subscriber stations, mobile stations, remote terminals, mobile devices, user terminals, wireless communication devices, user agents, or user devices. The terminal device may also be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device with wireless communication function, a computing device or other processing device connected to a wireless modem, a vehicle-mounted device, a wearable device, a terminal device in a future 5G network or a terminal device in a future evolved Public Land Mobile Network (PLMN), and the like, which are not limited in this embodiment.

The network device in this embodiment may be a device for communicating with a terminal device, the network device may be a Base Transceiver Station (BTS) in a global system for mobile communications (GSM) system or a Code Division Multiple Access (CDMA) system, may also be a base station (NodeB) in a Wideband Code Division Multiple Access (WCDMA) system, may also be an evolved NodeB (NB, NodeB) in an LTE system, may also be a wireless controller in a Cloud Radio Access Network (CRAN) scenario, or may be a relay station, an access point, a vehicle-mounted device, a wearable device, and a network device in a future 5G network or a network device in a future evolved PLMN network, and the like, and this embodiment is not limited in this application.

In the LTE/LTE-a/NR system defined by the 3rd generation partnership project (3 GPP), the multiple access scheme for the downlink generally employs an Orthogonal Frequency Division Multiple Access (OFDMA) scheme. The downlink resource is divided into a plurality of Orthogonal Frequency Division Multiplexing (OFDM) symbols as viewed in time (time domain) and a plurality of subcarriers as viewed in frequency (frequency domain). Part of the time-frequency resources in the downlink are used to carry Physical Downlink Control Channels (PDCCH). The PDCCH is used to carry Downlink Control Information (DCI). DCI is control information in a Physical Layer (Physical Layer) in which a network device indicates a User Equipment (UE) behavior. Meanwhile, the higher layer signaling may also be used for control information indicating UE behavior by the network device. The higher layer signaling is indication information for controlling and managing the relevant UE higher than the physical layer, for example, Radio Resource Control (RRC) signaling and the like. Part of the time-frequency resources in the downlink is used to carry a Physical Downlink Shared Channel (PDSCH). The PDSCH is used to carry data exchanged between the ue and the network device, and is shared by all ues accessing the network system.

In the process of indicating time-frequency resources, one granularity for characterizing the size of system time-domain resources is a slot (slot). For a slot based frame structure, each slot comprises 14 symbols. For a non-slot based frame structure, each slot may include 2/4/7 symbols. In addition, it is also defined that the granularity characterizing the size of the system frequency domain resource can be Resource Block (RB). In some configurations, an RB includes 12 subcarriers in the frequency domain, and each subband occupies a bandwidth of 15 kHz. One or more symbols may be included in the time domain. It can be understood that the granularity characterizing the size of the time domain resource of the system is a subframe, a mini-slot, and the like, and the embodiment of the present invention is not limited.

In the embodiments of the present application, a symbol is also referred to as a time domain symbol, and may be an Orthogonal Frequency Division Multiplexing (OFDM) symbol or a single carrier frequency division multiple access (SC-FDMA) symbol. Where SC-FDMA is also called orthogonal frequency division multiplexing with transform precoding (OFDM with TP).

Another commonly used granularity characterizing the size of a system time-frequency resource is a Resource Element (RE). Each RE includes one subcarrier in the frequency domain and one symbol in the time domain.

In addition, one granularity characterizing the size of the frequency domain resources of the system is the fractional Bandwidth (BWP). The network device configures one or more BWPs for the UE in its serving cell, where each BWP configuration includes a sub-carrier spacing (sub-carrier spacing) size parameter, a cyclic prefix (cyclic prefix), the number of Physical Resource Blocks (PRBs) occupied by the BWP, and the starting position of the first PRB. These parameters are configured by the network device through higher layer signaling. Meanwhile, the network device activates one or more BWPs based on the configured BWPs, and the UE performs interactive communication with the base station based on the activated BWPs.

Before the network device performs data transmission, the network device needs to notify the terminal device through DCI to receive data in a specific receiving manner on a specific time-frequency resource. Before the terminal device performs data transmission, the network device needs to notify the terminal device of sending data in a specific sending mode on a specific time-frequency resource through the DCI. The information bits of the DCI are transmitted to a channel coding module and rate matching is completed, and then modulation of the control information bits is performed according to a specific criterion, for example, Quadrature Phase Shift Keying (QPSK), and finally mapped onto a time-frequency domain resource to form a PDCCH.

The time-frequency resources occupied by the PDCCH are usually configured through a high-layer signaling or through a system message, and in the configuration process, a control-resource set (core) is used as a configuration unit. The information bits of the DCI indicated to the terminal device by the network device (for scheduling the terminal device to receive/transmit PDSCH) are all carried on the PDCCH. Or the DCI information bits may be carried on the time-frequency resources occupied by the PDCCH. CORESET can be understood as: some specific time frequency resources are adopted to carry DCI signaling on the time frequency resources in the system. The specific time frequency resources are notified to the terminal equipment in advance through a high-level signaling, so that the terminal equipment can detect the DCI signaling on the specific time frequency resources at the subsequent specific detection time. The control resource set includes time-frequency resource information occupied by the network device for sending the PDCCH, the network device may configure one or more control resource sets for the terminal device, and the network device may send the PDCCH to the terminal device on any control resource set corresponding to the terminal device.

One control resource set is contained in the frequency domain

The number and position of the RBs are configured by high-layer signaling. The frequency domain resource allocation manner of the control resource set is indicated by a bitmap (bitmap) with 6 RBs as granularity. Typically, a CORESET is indicated within a segment of the system bandwidth. Meanwhile, the definition of CORESET in the time domain usually includes one slot

One OFDM symbol, one for each OFDM symbol,

can be 1,2,3. The number and position of OFDM symbols contained in one CORESET are configured through high-layer signaling.

For example, for slot (slot) level scheduling, the CORESET is usually on the first 3 OFDM symbols of a slot, and for non-slot (non-slot) level scheduling (scheduled time domain resource is less than a slot), the CORESET can be anywhere within a slot. One terminal device can be configured with a plurality of CORESET, and each CORESET can be configured with an index number (index value). Wherein, the CORESET index value 0 is generally used for carrying system messages. The configuration information of the CORESET index is also notified by system messages or higher layer signaling, and other CORESET is usually used for carrying DCI common to cells (for indicating control messages common to cells) or DCI specific to terminal devices (for example, PDSCH/PUSCH for scheduling single propagation (unicast)). Each CORESET may be shared by a plurality of terminal devices within a serving cell (with corresponding scheduling being performed by the network device). The shared terminal devices may receive the PDCCH sent by the network device on the time-frequency resource indicated by the core set, and send data to the network device or receive data sent by the network device according to the PDCCH.

The receiving of the PDCCH needs to adopt an optimal receiving beam to ensure the receiving performance of the signal, meanwhile, the receiving of the PDCCH also needs network equipment to send a corresponding demodulation reference signal (DMRS) for channel estimation, the terminal equipment can accurately receive control information in the PDCCH through channel estimation, and when the channel estimation is performed based on the DMRS, some large-scale parameters, such as delay spread (delay spread), doppler shift (doppler shift), and receiving beam, are needed. The receive beams and the large-scale parameters are collectively referred to as quasi-co-location (QCL) information. The quasi-co-location information is typically configured in the CORESET configuration parameters. A Beam Pair (BPL), i.e. receiving Beam information, may occupy different time-frequency resources and employ different receiving beams for different CORESET of a terminal device.

The CORESET time-frequency resource is further divided into a plurality of Control Channel Elements (CCEs). One CCE corresponds to 6 Resource Element Sets (REGs), one REG includes 1 Physical Resource Block (PRB) in the frequency domain and one OFDM symbol in the time domain.

In the above, mainly describing the structure and configuration of physical resources of PDCCH, the terminal device needs to know how to detect DCI in addition to knowing which physical resources to receive DCI and correctly acquiring DCI information. The corresponding configuration information is referred to as a PDCCH search space set (SS set).

The search space set may be configured with DCI types, such as a common search space set (CSS set) corresponding to cell-common DCI, a UE-specific search space set (UE specific search space set) corresponding to UE-specific DCI, and the like.

A CORESET index number (index value) is also configured in the Search space set, which indicates that the Search space set is associated with CORESET, that is, DCI is detected on the CORESET time-frequency resource according to the detection mode configured by the Search space set. A Search space set may be associated with a CORESET.

For example, referring to fig. 1, fig. 1 is a schematic diagram of a correspondence between a search space set and CORESET. As shown in FIG. 1, SS set1 indicates that the Search space set has an index number of 1. When the terminal device detects the DCI on the time-frequency resource of the CORESET1, the DCI may be detected according to the detection mode indicated by the SS set1 or the SS set 2. When the terminal device detects the DCI on the time-frequency resource of the CORESET2, the DCI may be detected according to the detection mode indicated by the SS set 3. When the terminal device detects the DCI on the time-frequency resource of the CORESET3, the DCI may be detected according to the detection mode indicated by the SS set 4.

The Search space set comprises a group of PDCCH candidates (PDCCH candidates), one PDCCH candidate can represent the time-frequency resource position occupied by the transmission DCI information, and the terminal equipment needs to detect the DCI on the corresponding time-frequency resource position; one PDCCH candidate may also represent the number of bits for detecting DCI at the time-frequency resource location; one PDCCH candidate may also characterize the detection period for the DCI information. The number of PDCCH candidates characterizes the number of Blind Detections (BD) of the terminal device (corresponding to the blind detection capability of the terminal device).

For example, the terminal device can support a certain number of detection times in a certain detection period (for example, in one slot), and each detection requires the terminal device to perform channel estimation and threshold determination on decoding attempt and decoding correctness, so each detection can be understood as consuming processing resources of the terminal device, and the terminal device can only detect a certain number of PDCCH candidates in a certain detection period. The terminal device decodes the detected DCI information bits, and parses the decoded information bits, where the information bits usually include a plurality of fields, and the terminal device needs to determine the information indicated by the DCI according to a predefined field sequence and a bit length of the fields.

The technical scheme of the application can be applied to coordinated multiple points transmission/reception (CoMP). CoMP refers to that in downlink transmission, a UE can simultaneously communicate with multiple base stations, i.e., simultaneously receive data of multiple base stations. The base stations form a cooperation set and a UE simultaneously communicates. The base stations in the cooperation set may be respectively connected to different control nodes, and information interaction is performed between the control nodes, for example, scheduling policy information is interacted to achieve the purpose of cooperative transmission. Or, the base stations in the cooperation set are all connected to the same control node, and the control node receives channel state information, such as Channel State Information (CSI) or Reference Signal Receiving Power (RSRP), reported by the UE, collected by the base stations in the cooperation set, performs unified scheduling on the UEs in the cooperation set according to the channel state information of all the UEs in the cooperation set, and interacts a scheduling policy with the base stations connected to the base stations. And finally, each base station respectively notifies each UE through DCI carried by the PDCCH.

According to a data transmission strategy of a plurality of base stations in a cooperation set to a certain UE, the CoMP transmission strategy may include 3 modes of Dynamic Point Switching (DPS), coherent transmission (C-JT), and non-coherent transmission (NC-JT). The DPS refers to that for a certain UE, the base station with which data transmission is performed dynamically switches at different transmission times to select the base station with the best current channel condition in the cooperation set as much as possible for data transmission, that is, a plurality of base stations transmit data for the certain UE at different time intervals. C-JT refers to that multiple base stations transmit data for a certain UE at the same time, and antennas of the multiple base stations perform joint precoding, that is, an optimal precoding matrix is selected to perform joint phase and amplitude weighting between the multiple base station antennas, and this mechanism requires accurate phase calibration of the multiple base station antennas to perform accurate phase weighting between multiple groups of antennas. NC-JT refers to that multiple base stations transmit data for a certain UE at the same time, and antennas of the multiple base stations perform independent precoding, that is, each base station independently selects an optimal precoding matrix to perform joint phase and amplitude weighting between base station antennas.

According to the information interaction delay between the base stations, CoMP can be divided into an ideal (ideal backhaul) backhaul scenario and a non-ideal backhaul scenario.

For an ideal backhaul scenario, the inter-station distance between base stations or between a base station and a central node is short, or the base stations and the central node are connected by optical fibers with small transmission loss, so the interaction delay is negligible. In this case, it may be generally assumed that there is one central scheduling node for the base stations in the cooperative set, and the central scheduling node is used to perform joint resource scheduling on all users in multiple base stations. The base station is responsible for receiving Channel State Information (CSI) and scheduling request information fed back by the user and transmitting the CSI to the central scheduling node through the backhaul link. And the central scheduling node collects the feedback of the base station in the cooperation set to complete scheduling and transmits a scheduling strategy back to the base station. And then, a serving base station (serving TRP) in the cooperative set sends Downlink Control Information (DCI) to the user. According to the scheduling strategy, the data of the user is issued by the serving base station, or the serving base station and a cooperative base station (coordinated TRP) are jointly issued.

In an ideal backhaul scenario, the network device may use one DCI to schedule the UE to receive data. Referring to fig. 2, fig. 2 is a schematic diagram of scheduling data through one DCI in an ideal backhaul scenario. As shown in fig. 2, it is assumed that the TRP1 is a serving base station and the TRP2 is a cooperative base station. The TRP1 is responsible for issuing DCI to the UE to inform information such as time frequency resources occupied by data and a data sending mode. The data sending mode includes the number of transmission layers used by the base station to transmit data, the modulation and coding mode of each codeword (codeword), and the received beam indication information. One codeword corresponds to a particular transmission layer or transmission layers, and each codeword corresponds to an independent modulation and coding scheme and may dynamically indicate activation or deactivation. For example, in fig. 2, two base stations respectively transmit downlink data by using 1 layer, the DCI sent by the TRP1 to the UE may indicate to enable two codewords, where each codeword corresponds to 1 specific transmission layer and 1 specific receive beam indication.

Referring to fig. 3, fig. 3 is another schematic diagram of scheduling data through one DCI in an ideal backhaul scenario. As shown in fig. 3, TRP1 uses 2 layers to transmit downlink data, and the DCI sent down TRP indicates to enable a codeword, where the codeword corresponds to 2 specific transmission layers and receive beam indications. In this case, different code words may be transmitted by one base station, or may be transmitted by different base stations, that is, each code word may correspond to one base station.

In an ideal backhaul scenario, data scheduling indication through 2 DCIs may also be supported. Referring to fig. 4, fig. 4 is a schematic diagram of scheduling data through 2 DCIs in an ideal backhaul scenario. As shown in fig. 4, TRP1 and TRP2 may each transmit one DCI, each DCI corresponding to a time-frequency resource allocation indication and a transmission mode indication of one codeword. At this time, the UE requiring the TRP1 and TRP2 services simultaneously detects 2 DCIs and simultaneously receives data from the TRP1 and TRP2 according to the 2 DCIs detected and decoded. Compared with the manner of scheduling two PDSCHs through one DCI shown in fig. 2 and fig. 3, the network device may improve the scheduling flexibility by using 2 DCIs without increasing the bit length of the DCI.

In a non-ideal backhaul scenario, because the performance loss is caused by the interaction delay between the base stations, two base stations generally issue one DCI respectively to perform data scheduling. At this time, only semi-static interaction of scheduling information is needed between base stations. The DCI issued by each base station may at least independently indicate the resource allocation information, the modulation and coding scheme of the corresponding codeword, and the corresponding transmission layer. The schematic diagram of scheduling data through two DCIs in the non-ideal backhaul scenario is the same as that shown in fig. 4, and reference may be made to fig. 4.

It should be noted that if the UE detects one DCI in one slot (slot), the current transmission is a single TRP transmission. If the UE detects two DCIs in a slot, the current transmission is a multi-TRP transmission.

Here, the UE detecting one DCI or two DCIs refers to UE-specific DCI for scheduling downlink data in a certain time period (e.g., one slot or one DCI detection period of the UE). NR supports multiple DCI formats, where USS is UE-specific control information used to indicate the UE-specific data scheduling information, and the scrambling sequence of the DCI is generated according to a cell index value and an index value of the UE. The common DCI of the cell is detected in the CSS and used for indicating scheduling information (including data scheduling information, RS information, system information and the like) common to a plurality of UEs served by the cell, a scrambling sequence of the DCI is generated according to a cell index value, and configuration information (used for notifying time-frequency resources bearing the DCI and a detection method) of the DCI is indicated to a plurality of users served by the cell.

In addition, two DCI formats for scheduling downlink data are supported in NR, one is a compact DCI format and only includes fields necessary for scheduling data, and the other is a common DCI format and includes fields with more scheduling data, and the length of the common DCI format is usually greater than that of the compact DCI format. In addition to DCI for scheduling downlink data, the base station may issue CSS. Specifically, in a DCI detection period, the UE may detect one DCI or two DCIs used for scheduling downlink data, and may also detect a common DCI used for indicating a system message, RS trigger information, frame structure indication information, PI indication information, and the like. When configuring UE detection behavior, the base station configures multiple DCI formats in configuration parameters of a search space, and the UE performs multiple DCI blind detection attempts according to the multiple DCI format configuration information.

The following describes a pre-Preemption Indication (PI) field referred to in the present application.

Several major scenarios supported in the New Radio (NR) include ultra-reliable low latency communications (URLLC) and enhanced mobile broadband (eMBB). The non-slot based frame structure is usually configured for URLLC users to use, so as to meet the requirement of the URLLC users for low delay. From the perspective of the network side, the time-frequency resources of the network can be dynamically allocated to the eMBB users and URLLC users in real time according to the scheduling conditions of the base station itself and the requirements of the users served by the base station, so as to transmit data or control information. That is, one of the time-frequency resources of the network may be used to transmit the PDSCH of the eMBB user or may be used to transmit the PDSCH of the URLLC user. Alternatively, the PDSCH of the eMBB user and the PDSCH of the URLLC user may be simultaneously transmitted. For the case of simultaneously transmitting the PDSCH of the eMBB user and the PDSCH of the URLLC user, the base station will usually notify the time-frequency resources used for transmitting the PDSCH of the eMBB user through DCI in advance. After receiving the DCI, the UE receives the PDSCH on the corresponding time-frequency resource. In the process from the sending of the DCI to the receiving of the PDSCH by the user, the URLLC user may report a Scheduling Request (SR) to the base station. Due to the low delay requirement of URLLC users, the base station may reschedule the time-frequency resources already scheduled to the eMBB users for use by URLLC users. This scheduling manner of the base station is to preempt (pre-projection) the time-frequency resources for the eMBB users. That is, some time-frequency resources already scheduled to the eMBB users are used for transmitting data of URLLC users, and the data of the eMBB users may be punctured. The data of the eMBB user may also be contaminated in view of reducing interference of the URLLC user, and thus, may not be transmitted.

Typically, the time-frequency resources of a network are shared among multiple users in its serving cell. By shared is meant that time-frequency resources of the network may be scheduled simultaneously to multiple users for data transmission. At this time, the plurality of users may be referred to as paired users. Since the data of the paired users occupy the same time-frequency resource, transmission performance generally needs to be ensured by space division multiplexing to reduce interference between the paired users. Meanwhile, the base station informs each paired UE to perform corresponding demodulation reference signal measurement, so that each paired UE obtains accurate channel information corresponding to its own data transmission and interference information of paired users. However, for the case of simultaneously transmitting PDSCH of the eMBB user and PDSCH of the URLLC user, the data of the eMBB user will be punctured because the base station cannot notify the eMBB user in advance that part of the time-frequency resources are preempted. Referring to fig. 5, fig. 5 is a diagram illustrating eMBB user data punctured for transmitting URLLC user data. As shown in fig. 5, the time-frequency resources in BWP in slot n are scheduled to eMBB users for data transmission. While the eMBB data of OFDM symbol k is punctured for transmitting data of URLLC users.

Because the base station cannot notify the eMBB user of the condition that the time-frequency resource is preempted in advance, the eMBB user may consider that the actually preempted time-frequency resource still transmits its own data, and may perform corresponding data demodulation operation and buffer data bits (for example, buffer received original data bits, or buffer decoded bits). In the data buffering operation, if the data demodulation fails, the data received again and the data received this time may be merged, and data reception and demodulation attempts may be performed again, so as to improve the data demodulation performance. Considering the scenario that data of an eMBB user is punctured by URLLC data in data transmission, because the eMBB user cannot know the puncturing operation of the time-frequency resource and the position of the punctured time-frequency resource, if data demodulation and data caching are performed according to the non-punctured scenario, the probability of data detection failure of the eMBB user is obviously increased, and the data caching is polluted.

In order to improve the success rate of demodulation (demodulation) and decoding (decoding) when the time-frequency resources of the eMB user are punched and ensure that the eMB user caches correct data bits, an indication signaling is introduced into the NR for notifying the user of the event that the time-frequency resources are punched and the position of the punched time-frequency resources when the data is received for a certain time. Here, the indication signaling introduced in the NR is a pre-Preemption Indication (PI) field in the DCI. Specifically, the PI field is used to indicate the time-frequency resource location punctured by the eMBB user within the slot before the indication signaling.

For example, referring to fig. 6, fig. 6 is a signaling design for pre-indication. And the base station schedules eMBB users to transmit data on a certain time frequency resource, and the corresponding time frequency resource is temporarily occupied by the data of the URLLC users. The eMBB user detects the DCI carrying the PI field in a slot after the data transmission time. The PI field is used to indicate information that a part of time-frequency resources of a previous time (from detection of the DCI or from within a certain slot or slots before a first OFDM symbol occupied by the DCI in a time domain) is occupied. The eMBB user can adjust the current data demodulation according to the realization algorithm of the eMBB user according to the indication of the PI field. For example, if the original data bits are buffered, the data bits on the punctured time frequency resource are bypassed, or the buffered data bits on the punctured time frequency resource are cleared, so as to ensure the performance of subsequent data merging.

In the present application, the PI field is alternatively also referred to as PI signaling.

PI signaling is described below in conjunction with fig. 7 and 8.

The PI signaling is used for indicating position information of the RB-OFDM symbol, and the indicated RB-OFDM symbol represents that the time frequency resource of the part is preempted. Specifically, PI signaling may contain N bits, N ≧ 1 and an integer. For example, N-14, each bit corresponds to one UE, or one carrier of one UE (in the case of multicarrier aggregation). For one UE, it is determined which one of 14 bits is used for information indicating that own data is punctured according to PI signaling. As an example, each of the 14 bits corresponds to 14 OFDM symbols within one slot. When a bit of the 14 bits is 1, it indicates that the OFDM symbol corresponding to the bit is preempted. Meanwhile, the corresponding band size is the entire BWP.

Referring to fig. 7, fig. 7 is an indication manner of PI signaling. For example, the PI signaling includes 14 bits of 00001111000011, and each bit corresponds to 14 OFDM symbols in one slot in turn. The OFDM symbol corresponding to 1 is preempted and the OFDM symbol corresponding to 0 is not preempted.

Referring to fig. 8, fig. 8 is another indication manner of PI signaling. For example, the PI signaling includes 14 bits of 00110010011001, where the first 7 bits correspond to every two OFDM symbols in the first 1/2BWP bandwidths, and the last 7 bits correspond to every two OFDM symbols in the last 1/2BWP bandwidths. The OFDM symbol corresponding to 1 is preempted and the OFDM symbol corresponding to 0 is not preempted.

Under a multi-site cooperative transmission mechanism, even though a PI field is introduced, in many scenes, the UE still cannot determine the transmission behavior of the network side, so that whether the time-frequency resources of a plurality of TRPs for sending data are preempted or not is often misjudged. Therefore, the data demodulation performance of the UE is still poor.

This is explained in detail below with reference to fig. 9-11.

Referring to fig. 9, fig. 9 is an example of a UE demodulating data according to a PI field. As shown in fig. 9, in an ideal backhaul scenario, when a network device uses a scheduling DCI to schedule a UE to receive downlink data, and when the UE receives a PI signaling at a certain time slot n, the UE determines, according to an indication of the PI signaling, that a certain specific time-frequency resource is preempted at n-m time before n time. For example, if a certain bit in the PI field is 1, the UE considers that the time-frequency resource corresponding to the bit is preempted. Assume that at time n-k (before time n-m), the UE receives DCI #1 and DCI #2 for scheduling downlink data. DCI #1 is used to schedule PDSCH #1, and DCI #2 is used to schedule PDSCH # 2. PDSCH #1 and PDSCH #2 correspond to two codewords of the UE, respectively. PDSCH #1 and PDSCH #2 are transmitted at time n-m and are transmitted by different TRPs, respectively. The UE demodulates PDSCH #1 and PDSCH #2 and buffers PDSCH #1 and PDSCH #2, assuming that data on the specific time-frequency resource indicated by the PI signaling is punctured.

PDSCH #1 at time n-m in fig. 9 is assumed to be data for URLLC users and is transmitted by TRP 1. The code word of the eMBB user sent by TRP1 (e.g. PDSCH #1 in fig. 9) needs to puncture the time-frequency resources occupied by URLLC data. This is because the data of two UEs sent by the same TRP occupy the same time-frequency resource, and because the data of the URLLC user is bursty, there may be strong interference between the data of the two UEs. Therefore, to guarantee data demodulation performance of URLLC users, the codewords of eMBB users need to be punctured. At this time, since the PI signaling indicates the time-frequency resource location occupied by URLLC user data, the UE should consider PDSCH #1 to follow the indication of PI signaling. However, for another codeword of the eMBB user transmitted by TRP2 (e.g. PDSCH #2 in fig. 9), since spatial orthogonality may naturally exist between data of the URLLC user (TRP1 transmission) and data transmitted by TRP2, relative interference is small and the effect on demodulation performance is negligible.

In fact, since TRP1 does not transmit PDSCH #1 on the time frequency resources occupied by URLLC users, TRP2 may transmit PDSCH #2 on the time frequency resources occupied by URLLC users. However, the UE considers that PDSCH #1 follows the indication of PI signaling, and considers that PDSCH #2 also follows the indication of PI signaling. Therefore, neither TRP1 nor TRP2 can transmit PDSCH on the preempted time-frequency resource, reducing the spectral efficiency of the system.

Referring to fig. 10, fig. 10 is another example of a UE demodulating data according to a PI field. For non-ideal backhaul scenarios, the interaction of information (e.g., scheduling information) between two TRPs is semi-static. Therefore, if TRP1 transmits URLLC data on a specific time-frequency resource, TRP2 cannot obtain scheduling information in time, and thus TRP2 is not known for the case where TRP1 transmits URLLC data on a specific time-frequency resource. At this time, PDSCH #1 transmitted by TRP1 is punctured on the specific time-frequency resources. The PDSCH #2 transmitted by TRP2 is transmitted on the specific time-frequency resources. The UE cannot determine the transmission behavior of the network device through PI signaling. The strategy that the UE may take is to consider both PDSCH #1 and PDSCH #2 punctured on this particular time-frequency resource. For PDSCH #2, its data demodulation performance is affected.

Further, for a scenario where the network device employs two scheduling DCIs, each DCI includes a field for indicating time-frequency resource allocation. The PDSCH scheduled by each scheduling DCI may occupy different time-frequency resources.

Referring to fig. 11, fig. 11 is yet another example of a UE demodulating data according to PI signaling. As shown in fig. 11, PDSCH #1 and PDSCH #2 occupy different bandwidths. TRP1 schedules data for URLLC users in a particular OFDM symbol. At this time, for PDSCH #1, the information indicating whether the OFDM symbol is preempted by the following PI signaling is 10, which indicates that the first 1/2BWP of the OFDM symbol is preempted, and the second 1/2BWP is not preempted. And the indication of PI signaling is invalid for PDSCH # 2. At this time, if the UE considers that the indication of the PI signaling is valid for both PDSCHs, the demodulation performance of PDSCH #2 is seriously affected.

The technical solution of the present application is described below.

Referring to fig. 12, fig. 12 is a schematic flow chart of a method 100 of receiving data provided herein. The method 100 generally includes steps 110-140.

110. The network device sends at least one codeword to the terminal device. The terminal device receives at least one codeword from the network device.

Alternatively, at least one may also be expressed as one or more.

120. The network device determines that at least a portion of the time-frequency resources occupied by each of the at least one codeword is preempted.

130. The network equipment sends the first resource indication information to the terminal equipment. The terminal device receives first resource indication information from the network device.

When the network equipment determines that at least part of the time-frequency resources of each code word in the at least one code word sent to the terminal equipment are preempted, the network equipment indicates the preempted situation of the time-frequency resources occupied by each code word in the at least one code word by sending first resource indication information to the terminal equipment.

The first resource indication information is used for indicating that the time-frequency resource occupied by each code word in the at least one code word is preempted.

As an implementation manner, the first resource indication information is used to indicate whether the time-frequency resource occupied by each of the at least one codeword is preempted.

Or the first resource indication information is used to indicate that at least a part of the time-frequency resources occupied by each of the at least one codeword is preempted.

For example, the terminal device is from the network device to the at least one codeword in time slot n. And in the time slot n + k, the terminal device receives first resource indication information from the network device, wherein the first resource indication information is used for indicating that the time-frequency resource used by each code word in the at least one code word received by the terminal device is preempted. And the terminal equipment determines the information that the time-frequency resources in a certain time period (for example, in a certain slot or in a certain plurality of slots) before the first symbol of the slot n + k are preempted according to the first resource indication information. Wherein n and k are integers, and k is more than or equal to 1. The value of k may be configurable by the system. For example, the first resource indication information is used to indicate that some of the 14 symbols within slot n + m are preempted. Where slot n + m precedes slot n + k. Specifically, the first resource indication information may include at least one 14 bits, where each 14 bits corresponds to 14 symbols of the slot n + m in a one-to-one manner, and is used to indicate that the time-frequency resource of one codeword is preempted. If a certain bit of the 14 bits included in the first resource indication information, which indicates a certain code word, is 0, it indicates that the symbol corresponding to the bit is not preempted for the code word. If a bit is 1, it indicates that the symbol corresponding to the bit is preempted for the codeword.

In step 130, the network device sends the first resource indication information to the terminal device, which may include various manners. Several possible implementations are listed below as examples.

Mode 1

The network equipment sends one first DCI to the terminal equipment, wherein the one first DCI comprises first resource indication information, and the first resource indication information comprises a plurality of first fields.

Optionally, the plurality of first fields correspond to the at least one codeword. Wherein each of the plurality of first fields corresponds to one or more of the at least one codeword.

Here, there may be a one-to-one correspondence between the plurality of first fields and the at least one codeword, i.e., each first field corresponds to one of the at least one codeword.

Alternatively, there may be a one-to-many relationship between the plurality of first fields and the at least one codeword. For example, each first field may correspond to multiple codewords of the at least one codeword.

It is to be understood that the first field may also be expressed as the first information, or first field. The plurality of bits included in the first field may be continuous or discontinuous. Similarly, the plurality of first fields may be expressed as a plurality of first information, or a plurality of first fields. The plurality of bits included in the plurality of first fields may be continuous or discontinuous.

Referring to fig. 13, fig. 13 shows an example of establishing an association between a plurality of first fields and a plurality of codewords. As shown in fig. 13, the first DCI includes first resource indication information including two first fields, i.e., a first field #1 and a first field #2 shown in fig. 13. Where the first field #1 is associated with codeword 0. The first field #2 is associated with codeword 1. And if the terminal equipment enables the code word 0, judging the information that the time frequency resource occupied by the code word 0 is preempted according to the first field #1 in the first DCI. And if the terminal equipment enables the code word 1, judging the information that the time-frequency resource occupied by the code word 1 is preempted according to the first field #2 in the first DCI.

In one possible implementation, the plurality of first fields included in the first resource indication information are implicitly associated with the plurality of code words in sequence.

For example, the first resource indication information includes 2 first fields, i.e., a first field #1 and a first field # 2. Where the first field #1 is associated with codeword 0 and the first field #2 is associated with codeword 1.

Taking PI signaling as an example, the protocol may have predefined: if the network equipment configures a carrier corresponding to a plurality of PI signaling, the PI signaling corresponds to a code word in sequence.

In embodiment 1, the first DCI is DCI carrying resource indication information transmitted by the network device. The first DCI is carried in a Common Search Space (CSS). Alternatively, the first DCI is also referred to herein as a cell common DCI.

It should be understood that CSS is one type of search space, and another type of search space is referred to as UE specific search space (USS). The USS may also be referred to as a UE-specific search space. The CSS is used to carry control information (group common DCI) of a plurality of UEs, and is commonly detected by the plurality of UEs. The USS is used to carry control information (UE specific DCI) indicating a certain UE, and is detected by a specific UE.

Therefore, the first resource indication information in the first DCI may include information that time-frequency resources used by codewords of multiple UEs in a cell are preempted. Before the network device sends the at least one code word, sending configuration information to the terminal devices, wherein the configuration information is used for indicating the corresponding relation between the code word enabled by each terminal device and a plurality of first fields in the first resource indication information. In other words, the network device needs to semi-statically configure the correspondence between the codeword enabled by each UE and the first field in the first resource indication information.

For example, the first DCI includes first resource indication information including 4 first fields, which are respectively referred to as field 1, field 2, field 3, and field 4. The network equipment indicates that the code word 0 and the code word 1 which are enabled by the UE 1 are respectively associated with the field 1 and the field 2 through the configuration information. The UE 2 enabled codeword 0, codeword 1 are associated with field 1, field 3, respectively. The codeword 0, codeword 1 enabled by UE 3 are associated with field 1, field 4, respectively. UE 4 enabled codeword 0 is associated with field 3.

Each UE receives configuration information from the network device and determines a first field belonging to itself. When the UE receives the first DCI, the UE obtains a first field belonging to the UE from a plurality of first fields included in first resource indication information included in the first DCI, and processes a codeword received from the network device according to the first field belonging to the UE.

Optionally, each of the plurality of first fields corresponds to configuration information of at least one second DCI, where the at least one second DCI is respectively used to enable at least a portion of the at least one codeword.

It should be noted that the second DCI here is DCI transmitted by the network device to instruct the terminal device to enable the code word. Alternatively, the second DCI may also be referred to as a DCI for scheduling downlink data.

Optionally, the second DCI is used to indicate one or more of the at least one codeword described in step 110. That is, the second DCI may be used to indicate that a portion of the at least one codeword is enabled.

Here, each of the plurality of first fields corresponds to configuration information of at least one second DCI, e.g., each of the plurality of first fields corresponds to a configuration information index of at least one second DCI.

In addition, the first field and the second DCI may be in a one-to-one correspondence or a one-to-many relationship. For example, one first field corresponds to configuration information of one second DCI. Alternatively, one first field may correspond to configuration information of a plurality of second DCIs.

When configuring the first field and the configuration information of the second DCI to correspond to each other, as a specific implementation, each of the plurality of first fields may be configured to correspond to at least one control resource set of the second DCI.

For example, each of the plurality of first fields corresponds to a control resource set index of at least one second DCI.

Mode 2

The network equipment sends a first DCI to the terminal equipment, wherein the first DCI comprises a second field, and the second field is used for bearing first resource indication information. Wherein, the second field also carries codeword indication information, and the codeword indication information is used for indicating the index information of the at least one codeword.

In mode 2, the second field of the first DCI explicitly indicates, through the codeword indication information, a codeword associated with the first resource indication information carried in the second field.

As an alternative implementation, the codeword indication information may be index information of the at least one codeword. For example, the codeword indication information may be an index value of the at least one codeword. Or, the codeword indication information is an index value of each codeword and the number of associated codewords. Alternatively, other representations are possible.

Referring to fig. 14, fig. 14 shows an example of association between a codeword and first resource indication information. As shown in fig. 12, it is assumed that the second field of the first DCI contains 15 bits in total. Wherein, the first 14 bits are first resource indication information, and the last bit is codeword indication information. The codeword indication information may identify an index value of a codeword with which the first resource indication information is associated. For example, if the last bit of the second field is 0, it indicates that the codeword associated with the first resource indication information is codeword 0(CW 0). If the last bit of the second field is 1, the codeword associated with the first resource indication information is codeword 1(CW 1). It can be understood that, in the embodiment of the present invention, the order of the first resource indication information and the codeword indication information is not limited.

For another example, when the codeword indication information is 0, it indicates that the first resource indication information is associated with codeword 0, and codeword 1. When the codeword indication information is 1, it indicates that the first resource indication information is associated with codeword 0.

Referring to fig. 15, fig. 15 shows another example of association between a codeword and first resource indication information. As shown in fig. 15, it is assumed that the second field of the first DCI contains 16 bits in total, where the first 14 bits are the first resource indication information, and the last two bits are both the codeword indication information. Wherein, the last two bits may respectively carry index values of codeword 0 and codeword 1, indicating that the first resource indication information is associated with both codeword 0 and codeword 1.

For another example, when the codeword indication information is 00, it indicates that the first resource indication information is associated with both codeword 0 and codeword 1. When the codeword indication information is 01, it indicates that the first resource indication information is associated with codeword 0. When the codeword indication information is 10, it indicates that the first resource indication information is associated with codeword 1.

As an example, the codeword indication information may be set at the highest bit or the lowest bit of a plurality of bits contained in the second field. For example, in fig. 14 or fig. 15, the codeword indication information is set at the lowest bit of the second field.

As another optional implementation, the codeword indication information is configuration information index information of the third DCI. And the third DCI is DCI for indicating the terminal equipment to enable the code words.

Optionally, the third DCI is used to instruct the terminal device to enable one codeword or multiple codewords.

Further, the codeword indication information may specifically be control resource set index information of the third DCI. For example, the codeword indication information is a control resource set index value of the third DCI.

Mode 3

The network equipment sends a plurality of first DCIs to the terminal equipment, wherein each first DCI in the plurality of first DCIs is used for carrying a part of information in the first resource indication information.

Referring to fig. 16, fig. 16 shows another example of association between a codeword and first resource indication information. As shown in fig. 16, it is assumed that the first resource indication information includes 14 bits, and the 14 bits are divided into two parts of upper 7 bits and lower 7 bits. For each section, each bit is used to indicate information whether adjacent symbols are preempted. For example, in the upper 7-bit portion, the bit corresponding to index 0 indicates whether symbol 0 and symbol 1 in a slot (hereinafter referred to as slot n) are preempted. The bit corresponding to index 1 indicates whether symbol 2 and symbol 3 within slot n are preempted. And so on, the bit corresponding to index 6 indicates whether symbol 12 and symbol 13 in slot n are preempted. The lower 7-bit portion is the same. Meanwhile, the upper 7 bits are associated with codeword 0 and the lower 7 bits are associated with codeword 1.

The network equipment sends two first DCIs to the terminal equipment, wherein one first DCI in the two first DCIs is used for bearing the high-order 7 bits of the first resource indication information. The other first DCI is used to carry the lower 7 bits of the first resource indication information. The terminal device receives the two first DCIs, and can know whether the time-frequency resource occupied by the codeword 0 is preempted in the slot n and which symbols in the 14 symbols contained in the slot n are preempted. For example, if the bit corresponding to an index is 0, the high 7 bits associated with codeword 0 indicate that the corresponding two symbols of the index are not preempted in slot n. If the bit corresponding to a certain index is 1, it indicates that the corresponding two symbols of the index in slot n are preempted. According to another first DCI, the terminal device may determine that the time-frequency resource occupied by codeword 1 is preempted.

Optionally, each of the plurality of first DCIs corresponds to at least one of the at least one codeword.

As an optional implementation manner, the plurality of first DCIs respectively correspond to configuration information index information of the plurality of fourth DCIs. For example, the plurality of DCIs respectively correspond to configuration information index values of the plurality of fourth DCIs.

Here, the plurality of fourth DCIs are DCIs transmitted by the network device to instruct the terminal device to enable the code word. Optionally, each fourth DCI is used to instruct the terminal device to enable one codeword or multiple codewords.

It should be understood that herein the second DCI, the third DCI, and the fourth DCI are all DCIs sent by the network device to indicate that the terminal device enables the codeword. The second DCI, the third DCI, and the fourth DCI may also be referred to as a DCI for scheduling data. Wherein the numbers "second", "third" and "fourth" are merely for clarity of description. Hereinafter, DCI for scheduling data is also referred to as data DCI or scheduling DCI.

When the network device sends a plurality of first DCIs to the terminal device, the plurality of first DCIs are scrambled by different Radio Network Temporary Identities (RNTIs).

Optionally, in each of the above embodiments, when the at least one codeword is specifically multiple, the multiple codewords are located on the same carrier or located in the same partial bandwidth, and/or the multiple fourth DCIs are located on the same carrier or located in the same bandwidth, and/or the multiple first DCIs are located on the same carrier or located in the same partial bandwidth.

Further, when the at least one codeword is multiple, the receive beams of the multiple codewords are different, and/or the quasi Co-localized (QCL) of the multiple codewords are different.

The reception beams of the plurality of first DCIs are different, and/or the QCLs of the plurality of first DCIs are different.

140. And the terminal equipment processes the at least one code word according to the first resource indication information.

In step 140, the terminal device processes the at least one codeword according to the first resource indication information, which may include, for example, the terminal device bypassing data bits on the preempted time-frequency resource according to the first resource indication information, demodulating data received on the time-frequency resource occupied by the at least one codeword, or clearing the data bits on the preempted time-frequency resource to ensure the performance of subsequent data merging.

In the technical scheme of the application, the network device sends the first resource indication information to the terminal device, so as to indicate that the time-frequency resource used by each of at least one codeword sent by the network device to the terminal device is preempted. The terminal device can acquire the condition that the time-frequency resource occupied by each code word in the at least one code word is preempted according to the indication of the first resource indication information, so that correct demodulation and/or caching can be performed on the at least one code word, and the data demodulation performance of the terminal device can be improved.

In addition, the UE determines the information that the time-frequency resources used by the data scheduled by each TRP in the multi-site transmission mechanism are preempted according to the first resource indication information, so that the UE can be ensured to correctly cache data bits, and the cache is prevented from being polluted.

The following examples illustrate the present application.

It is assumed that the network device configures the UE to detect a plurality of cell-common DCIs of the same format within a detection period of one cell-common DCI. Accordingly, the UE considers that, in a detection time period of one cell common DCI (i.e., in one detection period of the cell common DCI), a plurality of cell common DCIs (group common DCIs) of the same format need to be detected, where the plurality of cell common DCIs of the same format identify that the DCI indicates the same type of control information.

The network equipment configures a plurality of public search spaces for the UE and respectively bears a plurality of cell public DCI. And the common DCIs of the plurality of cells all contain information indicating that the time-frequency resources occupied by the code words started by the UE are preempted. And establishing one-to-one corresponding incidence relation between the plurality of cell common DCIs and the plurality of scheduling DCIs. And the UE judges the correlation between the PDSCH scheduled by each scheduling DCI and a PI field carried in the cell public DCI associated with the scheduling DCI according to the correlation relation, and determines the information that the time-frequency resource used by the data scheduled by the scheduling DCI is preempted according to the PI field. When the PI resource indicates that a certain time-frequency resource is preempted, the UE may clear data on the preempted time-frequency resource. Therefore, the cache can be prevented from being polluted, and the performance of data merging after the data merging can be ensured.

Specifically, the network device may configure a plurality of CSSs for the UE, where the plurality of CSSs respectively carry scrambling sequences corresponding to two common search spaces of the DCI common to the plurality of cells and are usually different.

Further, the plurality of CSSs are associated with different common PDCCH configurations, respectively. For example, the plurality of CSSs are respectively associated with index values of different common PDCCH configurations. The common PDCCH configuration includes system messages of the cell and configuration parameters related to the CSS.

Alternatively, the plurality of CSSs are associated with different sets of control resources, respectively. Specifically, the plurality of CSSs are associated with index values of different control resource sets, respectively.

This association is applicable to network devices using one or two scheduling DCIs for downlink data scheduling.

(1) The network device uses 1 scheduling DCI for NCJT scene of downlink data scheduling.

In the NCJT scenario where a network device employs 1 scheduling DCI, the following two cases may be included.

Case 1

Both codewords for the UE are enabled.

For the UE, the UE considers the two codewords that are enabled to follow the indication of their associated PI fields, respectively. For the network device, the network device sends the cell common DCI carrying the PI fields to the UE according to the configuration information corresponding to the PI fields associated with each codeword.

The applicable conditions in case 1 are: indication information of spatial beams (spatial QCLs) corresponding to the two codewords is different.

Case 2

The UE enables only one codeword.

For the UE, the UE considers the enabled codeword to follow only the indication of the PI field associated with it. And the network equipment sends the PI field to the UE according to the configuration information corresponding to the PI field associated with the enabled code word.

Optionally, as a possible implementation, the protocol may also provide that the UE assumes that the enabled codeword can follow the indication of any PI field. At this time, the base station may send the cell common DCI carrying the PI field according to the configuration information corresponding to any PI field.

(1) The network device uses 2 pieces of scheduling DCI for NCJT scene of downlink data scheduling.

In the NCJT scenario in which the network device employs 2 pieces of scheduling DCI, it is considered that two pieces of scheduling DCI may employ different PDCCH configurations, for example, the two pieces of scheduling DCI correspond to different index values of the PDCCH configurations respectively. Alternatively, the two scheduling DCIs may correspond to different sets of control resources, respectively, for example, the two scheduling DCIs correspond to index values of different sets of control resources, respectively. Therefore, the association relationship between the codeword and the PI field can be established in two ways:

the PDCCH configuration of the scheduling DCI is associated with the PDCCH configuration of the cell public DCI carrying the PI field; alternatively, the first and second electrodes may be,

and the control resource set of the scheduling DCI is associated with the control resource set of the cell public DCI carrying the PI field.

In one possible implementation, the protocol may specify: when the cell common DCI and the scheduling DCI which bear the PI fields are configured in the same control resource set, the UE determines the condition that the time-frequency resources used by the downlink data are preempted only according to the indication of the PI fields in the same control resource set.

Referring to fig. 17, fig. 17 illustrates an example of associating a plurality of codewords with a plurality of PI fields. As shown in fig. 17, DCI #1 and PI #1 are both configured in core set #1, and then the UE determines that a specific time-frequency resource is preempted for PDSCH #1 scheduled by DCI #1 according to the indication of PI # 1. Meanwhile, both DCI #2 and PI #2 are configured in CORESET #2, and then the UE determines that a certain specific time-frequency resource is preempted for PDSCH #2 scheduled by DCI #2 according to the indication of PI # 2.

In another possible implementation, the protocol may specify: the PI indication signaling and the DCI for downlink data scheduling may be configured in different control resource sets, at this time, an association relationship is established between the control resource set where the PI indication signaling is located and the control resource set where the DCI for downlink data scheduling is located, and the UE determines whether data indicated by UE-specific DCI in the control resource set is occupied on the time-frequency resource only according to the time-frequency resource indicated by the PI indication signaling in the control resource set having the association relationship.

Referring to fig. 18, fig. 18 is another example of establishing an association between multiple codewords and multiple PI signaling. As shown in fig. 18, there is an association between CORESET #1 and CORESET # 2. There is an association between CORESET #3 and CORESET # 4. If DCI #1 is configured in CORESET #1 and PI #1 is configured in CORESET #2, the UE determines that a certain specific time-frequency resource is preempted for PDSCH #1 scheduled by DCI #1 according to the indication of PI # 1. For another example, if DCI #2 is configured in CORESET #3 and PI #2 is configured in CORESET #4, the UE determines that a specific time-frequency resource is preempted for PDSCH #2 scheduled by DCI #2 according to the indication of PI # 2.

In the existing scheme, for the PI fields carried in the common DCI of the same cell, only one network device is configured and only one UE detects one PI field in one detection period. For the UE, the UE considers that the detected preemption of the time-frequency resource indicated by the PI field is effective for all downlink data of the UE, which results in erroneous buffered data and poor demodulation performance. In the technical solution of the present application, the network device may indicate, through the plurality of first fields of the first resource indication information, information that a time-frequency resource used by downlink data scheduled by each TRP is preempted, so as to ensure that the UE can correctly demodulate and cache the data.

Some examples are given below for the ideal background scene and the non-ideal background scene, respectively.

1. The method is suitable for both the ideal backshaul scene and the non-ideal backshaul scene.

A user considers that, in a detection time period (period) of one cell common DCI, two cell common DCIs (group common DCI) of the same format need to be detected, where the two cell common DCI of the same format indicate that the DCI indicates the same type of control information. Accordingly, the base station configures the UE to detect the cell-common DCI of two same DCI formats in one time period (e.g., one slot). The specific configuration mode is as follows: the base station configures at least two public search spaces for the UE, and respectively carries two cell public DCI, wherein CRC check bits attached to control information bits carried in the two public search spaces are all scrambled by selecting one from a group of same Radio Network Temporary Identities (RNTIs), and scrambling sequences corresponding to the two public search spaces are usually different. The two public search spaces are respectively associated with different public PDCCH configurations (or index values of the PDCCH configurations), wherein the public PDCCH configurations comprise configuration parameters related to the system messages of the cell and the public search spaces; alternatively, the two common search spaces are respectively associated with different control resource sets (control resource sets) or index values of the control resource sets.

The association relationship between the common DCI of the two cells and the two code words is established in a one-to-one correspondence manner, and the establishment of the association relationship may be predefined by a protocol or configured in a high-layer signaling manner, for example, code word number 0 and code word number 1 respectively correspond to different common PDCCH configurations (or index values) or respectively correspond to different control resource sets (or index values), and the association relationship is applicable to adopt 1/2 DCIs for downlink data scheduling (hereinafter, referred to as data DCIs). The cell common DCI is used to indicate PI indication information. In particular, for the NCJT scenario that employs 1 DCI for downlink data scheduling, there are two cases.

When 2 code words are all enabled, the UE assumes that the enabled code words only follow the PI indications associated with the enabled code words, and at this time, the base station sends PI according to the configuration information corresponding to the PI indications associated with the enabled code words. Further, the conditions of the above implementation are: the Spatial beam (Spatial QCL) indication information corresponding to the two codewords is different. When the Spatial beam (Spatial QCL) indication information corresponding to two codewords is the same, the UE may assume that 2 codewords follow any PI indication, and at this time, the base station may send a PI according to the configuration information corresponding to any PI indication.

When only 1 codeword is enabled, the protocol may provide that the UE assumes that the enabled codeword only complies with its associated PI indication, and at this time, the base station sends the PI according to the configuration information corresponding to its associated PI indication. The protocol may also provide that the UE assumes that the enabled codeword complies with any PI indication, and at this time, the base station may send a PI according to configuration information corresponding to any PI indication.

For the NCJT scenario that uses 2 pieces of DCI for downlink data scheduling, considering that the 2 pieces of DCI for downlink data scheduling may use different PDCCH configurations (or index values) or respectively correspond to different control resource sets (or index values), the association relationship may be established between the PDCCH configuration of the DCI for downlink data scheduling and the common PDCCH configuration, or may be established between the control resource set of the DCI for downlink data scheduling and the control resource set of the common DCI.

Two possibilities are:

(1) the protocol defines: when the PI indication signaling and the DCI for downlink data scheduling are configured in the same control resource set, the UE determines whether data indicated by UE-specific DCI in the control resource set is occupied on the time-frequency resource only according to the time-frequency resource indicated by the PI indication signaling in the same control resource set. See the example illustration of fig. 17.

(2) The protocol defines: the PI indication signaling and the DCI for downlink data scheduling may be configured in different control resource sets, at this time, an association relationship is established between the control resource set where the PI indication signaling is located and the control resource set where the DCI for downlink data scheduling is located, and the UE determines whether data indicated by UE-specific DCI in the control resource set is occupied on the time-frequency resource only according to the time-frequency resource indicated by the PI indication signaling in the control resource set having the association relationship. See the example illustration of fig. 18.

In the prior art, for the common indication information of the same cell, only one base station is configured/indicated in one detection period, and only one UE is detected; for the PI indication information, the UE considers that the information that the time-frequency resource indicated by the PI indication information is occupied is valid for all data scheduled by the UE.

In the present application, for the common indication information of the same cell, a plurality of base stations will be configured/indicated in one detection period, and a plurality of UEs will detect the common indication information; for the PI indication information, the UE considers that the information that the time-frequency resource indicated by the PI indication information is occupied only takes effect on the data indicated by the DCI scheduling downlink data associated with the indication information.

2. The method is mainly suitable for the ideal-backshaul scene.

Namely, a central scheduling node is assumed to exist among the multiple stations, and at this time, the cooperative interaction time delay among the multiple stations is considered to be short, so that real-time scheduling coordination can be performed. Adding code word indication information (for a single DCI scene) or PDCCH configuration indication information (for a multi-DCI scene) in PI indication fields in the cell common DCI, wherein each PI indication field corresponds to different code words or PDCCH configuration indications. For example, there are N PI indication fields in the common DCI, and the base station may configure the UE to decode 1 or more PI indication fields of the N PI indication fields.

When the base station only decodes 1 PI indication field, 1-2bit is added into the PI indication field to indicate the code word/PDCCH configuration information of the PI indication field. For example, the first 14 bits of the PI indication field are used to indicate occupied time-frequency resources according to the existing design, and 1-2 bits are added after the first 14 bits in the PI indication field to indicate a codeword index value corresponding to the occupied time-frequency resource indicated by the 14 bits, or a corresponding index value of PDCCH configuration (where each PDCCH configuration index value corresponds to one PDCCH configuration information including the time-frequency resource occupied by the PDCCH and a detection decoding manner, such as a detection period, a DCI format, an aggregation level, etc.), or corresponds to an index value of CORESET (at this time, it is considered that each data DCI schedules at least one different codeword respectively and is carried in one CORESET respectively).

For example, as shown in fig. 19, (a) and (b) of fig. 19 show one way to establish an association for multiple codewords and multiple PI signaling. The added indication information (1-2 bits) may be the most significant bit in each PI indication field or the least significant bit in the PI indication field. Wherein, the mode of increasing 1bit is as follows: the bit indication "0" indicates that the PI indication field is valid for all codewords, and the bit indication "1" indicates that the PI indication field is valid for codeword 0; the way of adding 2 bits is: the bit indication "00" indicates that the PI indication field is valid for all codewords, the bit indication "01" indicates that the PI indication field is valid for codeword 0, and the bit indication "10" indicates that the PI indication field is valid for codeword 1. Another indication mode is that compared with the existing PI indication field, bits are not added, all bits of the PI indication field can be split into two parts, each part of bits corresponds to one codeword, and meanwhile, the resolution of the time-frequency resource indication of each part is reduced (this mode affects the accuracy of the indication but ensures that the number of bits is unchanged).

As shown in fig. 20, fig. 20 is another way to establish an association relationship between multiple codewords and multiple PI signaling. The existing PI indication field is divided into two parts, namely an upper 7 bit part and a lower 7 bit part, and for each part, each bit of the existing PI indication field corresponds to an indication whether two adjacent OFDM symbols are occupied or not (compared with the original PI indication, the resolution of time-frequency resource indication is reduced).

When the base station is configured to decode multiple PI indication fields, the base station needs to further indicate codeword index values corresponding to the multiple PI indication fields. One way is to indicate the codeword index value corresponding to each PI indication field or the corresponding PDCCH configuration information index value or the CORESET configuration index value through high layer signaling. Another way is to predefine that if a base station configures a carrier corresponding to a plurality of PI indication fields, each PI indication field corresponds to a codeword in sequence.

As shown in fig. 21, fig. 21 is another way to establish an association relationship between multiple codewords and multiple PI fields. If the network configures one carrier corresponding to two PI fields, the two PI fields respectively correspond to two code words. According to the sequence of the PI fields, the PI field 1 corresponds to a code word 0, and the PI field 2 corresponds to a code word 1. And the terminal equipment determines the condition that the time-frequency resources used by the two code words are preempted according to the two PI fields.

In the application, for the common indication information of the same cell, the base station may indicate the codeword information corresponding to the PI indication field in a detection period, and the UE may consider that the information indicated by the PI indication information that the time-frequency resource is occupied only takes effect on the data indicated by the DCI of the scheduling downlink data associated with the indication information.

The method for receiving data provided by the present application is described in detail above, and the apparatus for receiving data and the apparatus for transmitting data provided by the present application are described below.

Referring to fig. 22, fig. 22 is a schematic block diagram of an apparatus 600 for receiving data provided herein. The apparatus 600 comprises a processing unit 610 and a transceiving unit 620.

A transceiver unit 610, configured to receive first resource indication information, where the first resource indication information is used to indicate information that a time-frequency resource occupied by each codeword in at least one codeword is preempted;

a processing unit 620, configured to process each of the at least one codeword according to the first resource indication information.

In a possible implementation manner, the transceiving unit 610 is specifically configured to receive one first DCI, where the one first DCI includes the first resource indication information, where the first resource indication information includes a plurality of first fields, where,

each of the plurality of first fields corresponds to the at least one codeword; alternatively, the first and second electrodes may be,

each of the plurality of first fields corresponds to configuration information of at least one second DCI, where the at least one second DCI is respectively used to enable at least a portion of the at least one codeword; alternatively, the first and second electrodes may be,

each of the plurality of first fields corresponds to a set of control resources of at least one second DCI, the at least one second DCI being respectively used to enable at least a portion of the at least one codeword.

In a possible implementation manner, the transceiving unit 610 is specifically configured to receive one first DCI, where the one first DCI includes a first field, the first field is used to carry the first resource indication information, and the first field further carries codeword indication information, where,

the codeword indication information is index information of a codeword associated with the at least one resource indication information;

or, the codeword indication information is configuration information index value information of a third DCI, where the third DCI is used to enable at least a part of codewords in the at least one codeword;

or, the codeword indication information is a control resource set index value of a third DCI, where the third DCI is used to enable at least a part of the at least one codeword.

In a possible implementation manner, the transceiving unit 610 is specifically configured to receive a plurality of first DCIs, where each of the plurality of first DCIs is used to carry a part of information in the first resource indication information; wherein the content of the first and second substances,

each first DCI in the plurality of first DCIs corresponds to at least one codeword in the at least one codeword;

or, the plurality of first DCIs respectively correspond to configuration information index value information of a plurality of fourth DCIs, and the plurality of fourth DCIs are respectively used for enabling at least a part of the at least one codeword;

or, the plurality of first DCIs respectively correspond to control resource set index values of a plurality of fourth DCIs, and the plurality of fourth DCIs are respectively used for enabling at least a part of the at least one codeword.

Alternatively, the transceiver unit 610 may be a transceiver, and the transceiver 610 has a function of transmitting and/or receiving, and the transceiver may be replaced by a receiver and/or a transmitter.

Alternatively, the transceiving unit 610 may be a communication interface. In particular, the communication interface may comprise an input interface and/or an output interface.

Alternatively, the processing unit 620 may be a processor. Alternatively, the processing unit 620 may be a processing device, and the functions of the processing device may be partially or entirely implemented by software.

In a possible implementation, the functions of the processing means may be partly or wholly implemented by software. At this time, the processing device may include a memory for storing the computer program and a processor for reading and executing the computer program stored in the memory to perform the steps implemented internally by the terminal device in the method embodiment. For example, the steps described above as being performed by the processing unit 620 are performed.

In one possible implementation, the processing device may be a processor. The memory for storing the computer program is located outside the processing device and the processor is connected to the memory by means of circuits/wires to read and execute the computer program stored in the memory.

In a particular implementation, the processing device may be a chip or an integrated circuit.

Referring to fig. 23, fig. 23 is a schematic block diagram of an apparatus 800 for receiving data provided herein. The apparatus 800 comprises a processing unit 810 and a transceiving unit 820.

A transceiving unit 810, configured to transmit at least one codeword to a terminal device;

a processing unit 820, configured to determine that at least a portion of the time-frequency resources occupied by each of the at least one codeword is preempted;

a transceiver unit 810, configured to send first resource indication information to a terminal device, where the first resource indication information is used to indicate that a time-frequency resource occupied by each codeword in the at least one codeword is preempted.

In a possible implementation manner, the transceiving unit 810 is specifically configured to transmit one first DCI, where the one first DCI includes the first resource indication information, and the first resource indication information includes a plurality of first fields, where,

In a possible implementation manner, the transceiving unit 810 is specifically configured to transmit one first DCI, where the one first DCI includes a first field, the first field is used to carry the first resource indication information, and the first field further carries codeword indication information, where,

or, the codeword indication information is configuration information index value information of a third DCI, where the third DCI is used to enable at least a part of the at least one codeword;

In a possible implementation manner, the transceiver unit 810 is specifically configured to transmit a plurality of first DCIs, where each of the plurality of first DCIs is used to carry a part of information in the first resource indication information; wherein the content of the first and second substances,

Alternatively, the transceiver unit 810 may be a transceiver, the transceiver 810 having a transmitting and/or receiving function, and the transceiver may be replaced by a receiver and/or a transmitter.

Alternatively, the transceiving unit 810 may be a communication interface. In particular, the communication interface may comprise an input interface and/or an output interface.

Alternatively, the processing unit 820 may be a processor. Alternatively, the processing unit 820 may be a processing device, and the functions of the processing device may be partially or wholly implemented by software.

In one possible design, the functions of the processing means may be implemented partly or wholly in software. At this time, the processing device may include a memory for storing the computer program and a processor for reading and executing the computer program stored in the memory to perform the steps implemented internally by the terminal device in the method embodiment. For example, the steps described above as being performed by the processing unit 820 are performed.

In one possible design, the processing device may be a processor. The memory for storing the computer program is located outside the processing device and the processor is connected to the memory by means of circuits/wires to read and execute the computer program stored in the memory.

Referring to fig. 24, fig. 24 is a schematic structural diagram of a terminal device 7000 provided in the present application. As shown in fig. 24, the terminal device 7000 includes a processor 7001 and a transceiver 7002. Optionally, terminal device 7000 also includes a memory 7003. The processor 7001, the transceiver 7002, and the memory 7003 may communicate with each other via internal connection paths to transmit control and/or data signals. The memory 7003 is used for storing computer programs, and the processor 7001 is used for calling and executing the computer programs from the memory 7003 to control the transceiver 7002 to transmit and receive signals.

Optionally, the terminal device 7000 may further include an antenna 7004 for transmitting information or data output from the transceiver 7002 via a wireless signal.

The processor 7001 and the memory 7003 may be integrated into one processing apparatus, and the processor 7001 is configured to execute the program codes stored in the memory 7003 to implement the above-described functions. In particular implementations, the memory 7003 may also be integrated in the processor 7001 or separate from the processor 7001.

The processor 7001 may be used to perform actions described in the previous method embodiments as being implemented internally by the terminal device, while the transceiver 7002 may be used to perform actions described in the previous method embodiments as being received or transmitted by the terminal device.

For example, the transceiver 7002 is used to receive first resource indication information from a network device. The processor is configured to process at least one codeword indicated by the first resource indication information according to the first resource indication information. The first resource indication information is used for indicating that the time-frequency resource occupied by each code word in at least one code word is preempted.

For another example, the transceiver 7002 is used to receive a first DCI, or a plurality of first DCIs, from a network device.

Optionally, terminal device 7000 may also include a power supply 7005 for providing power to various devices or circuits in the terminal device.

In addition to this, in order to further improve the functions of the terminal device, the terminal device 7000 may further include one or more of the input unit 7006, the display unit 7007, the audio circuit 7008, the camera 7009, the sensor 610, and the like. The audio circuitry may also include a speaker 70082, a microphone 70084, and the like.

In addition, the present application also provides a network device 1000, which is described below with reference to fig. 22.

Referring to fig. 25, fig. 25 is a schematic structural diagram of a network device 1000 provided in the present application. The network device 1000 is configured to implement the functionality of the first IAB node in the method embodiment. As shown in fig. 21, the network device 1000 includes an antenna 1101, a radio frequency device 1102, and a baseband device 1103. An antenna 1101 is connected to the radio frequency device 1102. In the uplink direction, the rf device 1102 receives a signal transmitted by the terminal device through the antenna 1101, and transmits the signal transmitted by the terminal device to the baseband device 1103 for processing. In the downlink direction, the baseband device 1103 processes a signal to be sent to the terminal device and sends the signal to the radio frequency device 1102, and the radio frequency device 1102 processes the signal and sends the processed signal to the terminal device through the antenna 1101.

The baseband device 1103 may include one or more processing units 11031. In addition, the baseband apparatus 1103 may further include a storage unit 11032 and a communication interface 11033. The storage unit 11032 is used to store programs and data. The communication interface 11033 is used to exchange information with the radio frequency device 1102. The communication interface 11033 may be an input-output interface or an input-output circuit.

The network device 1000 in the above apparatus embodiment may completely correspond to the network device in the method embodiment, and the network device 1000 includes corresponding units for executing corresponding steps executed by the network device in the method embodiment.

For example, radio 1102 is configured to transmit at least one codeword. The baseband apparatus 1103 is configured to determine that at least a portion of the time-frequency resources occupied by each of the at least one codeword is preempted. The radio frequency device 1102 is further configured to transmit the first resource indication information. For another example, the radio frequency device is configured to transmit one first DCI or a plurality of first DCIs.

In addition, the present application also provides a communication system, which includes the terminal device and the network device in the above method embodiment.

The present application further provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a computer, causes the computer to perform the steps and/or processes performed by the terminal device in any of the method embodiments.

The present application further provides a computer program product comprising computer program code to, when run on a computer, cause the computer to perform the steps and/or procedures performed by the terminal device in any of the method embodiments.

The present application further provides a chip comprising a processor. A memory for storing the computer program is provided separately from the chip, and a processor is used for executing the computer program stored in the memory to perform the steps and/or procedures performed by the terminal device in any of the method embodiments.

Further, the chip may also include a memory and a communication interface. The communication interface may be an input/output interface, an input/output circuit, or the like.

The present application further provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a computer, causes the computer to perform the steps and/or processes performed by the network device in any of the method embodiments.

The present application further provides a computer program product comprising computer program code to, when run on a computer, cause the computer to perform the steps and/or procedures performed by the network device in any of the method embodiments.

The present application further provides a chip comprising a processor. The memory for storing the computer program is provided separately from the chip, and the processor is configured to execute the computer program stored in the memory to perform the steps and/or procedures performed by the network device in any of the method embodiments.

The processor in the embodiments of the present application may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method embodiments may be performed by integrated logic circuits of hardware in a processor or instructions in the form of software. The processor may be a general purpose processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other programmable logic device, discrete gate or transistor logic, or discrete hardware components. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in the embodiments of the present application may be directly implemented by a hardware encoding processor, or implemented by a combination of hardware and software modules in the encoding processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in a memory, and a processor reads information in the memory and completes the steps of the method in combination with hardware of the processor.

The memory in the embodiments of the present application may be either volatile memory or nonvolatile memory, or may include both volatile and nonvolatile memory. The non-volatile memory may be a read-only memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an electrically Erasable EPROM (EEPROM), or a flash memory. Volatile memory can be Random Access Memory (RAM), which acts as external cache memory. By way of example, but not limitation, many forms of RAM are available, such as Static Random Access Memory (SRAM), Dynamic Random Access Memory (DRAM), Synchronous Dynamic Random Access Memory (SDRAM), double data rate SDRAM, enhanced SDRAM, SLDRAM, Synchronous Link DRAM (SLDRAM), and Direct Rambus RAM (DRRAM). It should be noted that the memory of the systems and methods described herein is intended to comprise, without being limited to, these and any other suitable types of memory.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware, depending on 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.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the elements can be selected according to actual needs to achieve the purpose of the embodiments of the present application.

In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application or portions thereof that substantially contribute to the prior art may be embodied in the form of a software product stored in a storage medium and including instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present application.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A method of receiving data, comprising:

the terminal equipment receives first resource indication information, wherein the first resource indication information is used for indicating information that time-frequency resources occupied by each code word in at least one code word are preempted, the at least one code word is a plurality of code words, a first code word in the plurality of code words is scheduled by DCI (Downlink control information) belonging to a first control resource set, a second code word in the plurality of code words is scheduled by DCI belonging to a second control resource set, and the preempted information of the time-frequency resources corresponding to the first code word and the second code word are respectively indicated by different fields in the first resource indication information;

and the terminal equipment processes each code word in the at least one code word according to the first resource indication information.

2. The method of claim 1, wherein the first resource indication information is used for indicating that time-frequency resources occupied by each of the at least one codeword are preempted, and comprises:

the first resource indication information is used for indicating whether a time-frequency resource set occupied by each code word in the at least one code word is preempted or not; alternatively, the first and second electrodes may be,

the first resource indication information is used for indicating that at least a part of time domain resources occupied by each code word in the at least one code word are preempted.

3. The method according to claim 1 or 2, wherein the terminal device receives the first resource indication information, and comprises:

the terminal device receives a first DCI, wherein the first DCI comprises the first resource indication information, the first resource indication information comprises a plurality of first fields, and the first field comprises a plurality of first fields,

4. The method according to claim 1 or 2, wherein the terminal device receives the first resource indication information, and comprises:

the terminal device receives a first DCI, where the first DCI includes a first field, the first field is used for carrying the first resource indication information, and the first field also carries codeword indication information, where,

5. The method according to claim 1 or 2, wherein the terminal device receives the first resource indication information, and comprises:

the terminal equipment receives a plurality of first DCIs, wherein each first DCI in the plurality of first DCIs is used for carrying a part of information in the first resource indication information; wherein the content of the first and second substances,

6. The method of claim 5, wherein the plurality of first DCIs are scrambled by different RNTI sequences.

7. The method of claim 5, wherein the at least one codeword is a plurality of codewords,

the multiple code words are located on the same carrier or in the same partial bandwidth; and/or the presence of a gas in the gas,

the plurality of fourth DCIs are located on the same carrier or on the same partial bandwidth; and/or the presence of a gas in the gas,

the plurality of first DCIs are located on the same carrier or on the same fractional bandwidth.

8. The method according to claim 5, wherein the at least one codeword is a plurality of codewords, wherein receive beams of the plurality of codewords are different, and/or wherein quasi co-location QCLs of the plurality of codewords are different;

the receive beams of the plurality of first DCIs are different, and/or the quasi-co-location QCLs of the plurality of first DCIs are different.

9. A method of transmitting data, comprising:

the network terminal equipment sends at least one code word to the terminal equipment, wherein the at least one code word is a plurality of code words, a first code word in the plurality of code words is scheduled by DCI belonging to a first control resource set, and a second code word in the plurality of code words is scheduled by DCI belonging to a second control resource set;

the network equipment determines that at least one part of time frequency resources occupied by each code word in the at least one code word is preempted;

the network device sends first resource indication information to a terminal device, where the first resource indication information is used to indicate information that time-frequency resources occupied by each codeword in the at least one codeword are preempted, and different fields in the first resource indication information respectively indicate information that time-frequency resources corresponding to the first codeword and the second codeword are preempted.

10. The method according to claim 9, wherein the first resource indication information is used for indicating that the time-frequency resource occupied by each of the at least one codeword is preempted, and comprises:

the first resource indication information is used for indicating whether the time-frequency resource occupied by each code word in the at least one code word is preempted or not; alternatively, the first and second electrodes may be,

11. The method according to claim 9 or 10, wherein the network device sends the first resource indication information to the terminal device, and comprises:

the network device sends one first DCI to a terminal device, wherein the one first DCI comprises the first resource indication information, the first resource indication information comprises a plurality of first fields, and the terminal device sends the first DCI to the terminal device,

12. The method according to claim 9 or 10, wherein the network device sends the first resource indication information to the terminal device, and comprises:

the network device sends a first DCI to a terminal device, wherein the first DCI comprises a first field, the first field is used for carrying the first resource indication information, the first field also carries codeword indication information, and the first field further carries codeword indication information,

13. The method according to claim 9 or 10, wherein the network device sends the first resource indication information to the terminal device, and comprises:

the network equipment sends a plurality of first DCIs to terminal equipment, wherein each first DCI in the plurality of first DCIs is used for bearing a part of information in the first resource indication information; wherein the content of the first and second substances,

14. The method of claim 13, wherein the plurality of first DCIs are scrambled by different RNTI sequences.

15. The method of claim 13, wherein the at least one codeword is a plurality of codewords, and wherein the plurality of codewords are located on the same carrier or in the same fractional bandwidth; and/or the presence of a gas in the gas,

16. The method of claim 13, wherein the at least one codeword is a plurality of codewords, wherein transmit beams of the plurality of codewords are different, and/or wherein quasi-co-location QCLs of the plurality of codewords are different;

the transmission beams of the plurality of first DCIs are different, and/or the quasi-co-location QCLs of the plurality of first DCIs are different.

17. An apparatus for receiving data, comprising:

a transceiver unit, configured to receive first resource indication information, where the first resource indication information is used to indicate information that a time-frequency resource occupied by each codeword in at least one codeword is preempted, where the at least one codeword is a plurality of codewords, a first codeword in the plurality of codewords is scheduled by DCI belonging to a first control resource set, a second codeword in the plurality of codewords is scheduled by DCI belonging to a second control resource set, and information that time-frequency resources corresponding to the first codeword and the second codeword are preempted is indicated by different fields in the first resource indication information, respectively;

a processing unit, configured to process each codeword of the at least one codeword according to the first resource indication information.

18. The apparatus of claim 17, wherein the first resource indication information is used for indicating that time-frequency resources occupied by each of the at least one codeword are preempted, and comprises:

19. The apparatus according to claim 17 or 18, wherein the transceiver unit is specifically configured to receive one first DCI, the one first DCI including the first resource indication information, the first resource indication information including a plurality of first fields, wherein,

20. The apparatus according to claim 17 or 18, wherein the transceiver unit is specifically configured to receive one first DCI, where the one first DCI includes a second field, and the second field is used to carry the first resource indication information and carries codeword indication information, where,

the codeword indication information is index information of the at least one codeword;

or, the codeword indication information is configuration information index information of a third DCI, where the third DCI is used to enable at least a part of the at least one codeword;

or, the codeword indication information is control resource set index information of a third DCI, where the third DCI is used to enable at least a part of the at least one codeword.

21. The apparatus according to claim 17 or 18, wherein the transceiver unit is specifically configured to receive a plurality of first DCIs, and each of the plurality of first DCIs is used for carrying a part of the information in the first resource indication information; wherein the content of the first and second substances,

or the plurality of first DCIs respectively correspond to configuration information index information of a plurality of fourth DCIs, and the plurality of fourth DCIs are respectively used for enabling at least a part of the at least one code word;

or, the plurality of first DCIs respectively correspond to control resource set index information of a plurality of fourth DCIs, and the plurality of fourth DCIs are respectively used for enabling at least a part of the at least one codeword.

22. An apparatus for transmitting data, comprising:

a transceiver unit, configured to transmit at least one codeword to a terminal device, where the at least one codeword is a plurality of codewords, a first codeword in the plurality of codewords is scheduled by DCI belonging to a first set of control resources, and a second codeword in the plurality of codewords is scheduled by DCI belonging to a second set of control resources;

a processing unit, configured to determine that at least a portion of time-frequency resources occupied by each of the at least one codeword is preempted;

a transceiver unit, configured to send first resource indication information, where the first resource indication information is used to indicate information that a time-frequency resource occupied by each codeword in the at least one codeword is preempted, and different fields in the first resource indication information respectively indicate information that time-frequency resources corresponding to the first codeword and the second codeword are preempted.

23. The apparatus of claim 22, wherein the first resource indication information is used for indicating that time-frequency resources occupied by each of the at least one codeword are preempted, and comprises:

24. The apparatus according to claim 22 or 23, wherein the transceiver unit is specifically configured to transmit one first DCI, and wherein the one first DCI includes the first resource indication information, and wherein the first resource indication information includes a plurality of first fields, and wherein,

25. The apparatus of claim 22 or 23, wherein the transceiver unit is specifically configured to transmit one first DCI, and the one first DCI includes a first field, and the first field is used to carry the first resource indication information and also carries codeword indication information, wherein,

26. The apparatus according to claim 22 or 23, wherein the transceiver unit is specifically configured to transmit a plurality of first DCIs, and each of the plurality of first DCIs is used to carry a part of the information in the first resource indication information; wherein the content of the first and second substances,

27. A computer-readable storage medium, characterized in that the computer-readable storage medium comprises computer program code which, when executed on a computer, causes the computer to perform the method according to any of claims 1-8.

28. A computer-readable storage medium, characterized in that the computer-readable storage medium comprises computer program code which, when executed on a computer, causes the computer to perform the method according to any of claims 9-16.

29. A chip comprising a memory for storing a computer program and a processor for reading the computer program from the memory and executing the computer program to perform the method of any one of claims 1 to 8.

30. A chip comprising a memory for storing a computer program and a processor for reading the computer program from the memory and executing the computer program to perform the method of any one of claims 9 to 16.