CN116325608A - Method and communication device for transmitting physical uplink shared channel - Google Patents

Abstract

The application provides a precoding method and a communication device. The micro station indicates whether the micro UE uses broadband precoding or subband precoding in the different proportion time slot according to whether a CDM group to which a scheduled antenna port belongs is the same as a CDM group to which a scheduled antenna port of the macro station belongs, and the micro UE determines whether the broadband precoding or subband precoding is used according to whether the time slot is the different proportion time slot and whether the micro station is the CDM group to which the antenna port scheduled by the micro UE belongs, so that the uplink transmission performance of the UE is improved.

Description

Method and communication device for transmitting physical uplink shared channel Technical Field

The present invention relates to the field of communications, and in particular, to a method and a communications device for transmitting a physical uplink shared channel.

Background

In general, in a factory macro-micro scenario, a macro station downlink may use subband precoding, and a micro User Equipment (UE) uplink may use wideband precoding. However, if the downlink demodulation reference signal (demodulation reference signal, DMRS) of the macro station and the uplink DMRS of the micro UE collide on the different-allocation slots and the same code division multiplexing (code division multiplexing, CDM) group is used, they interfere with each other. At this time, the wideband precoding of the micro UE is not good for performance due to the complex interference of the macro station downlink.

Therefore, precoding of micro UEs in a factory macro-micro interference scenario becomes a problem to be solved.

Disclosure of Invention

The application provides a method and a communication device for transmitting a physical uplink shared channel, which can improve the uplink transmission performance of terminal equipment.

In a first aspect, a method for sending a physical uplink shared channel is provided, including: the terminal equipment receives first Downlink Control Information (DCI), wherein the first DCI is used for scheduling the terminal equipment to carry out uplink transmission on a first time unit and indicating one or more first antenna ports used for the uplink transmission of the terminal equipment; the terminal equipment uses sub-band precoding or broadband precoding to precode uplink data transmitted in each antenna port of one or more first antenna ports according to the first DCI, and generates a Physical Uplink Shared Channel (PUSCH); the terminal device transmits a PUSCH to the network device in a first time unit.

In the technical scheme, the terminal equipment can use sub-band precoding or broadband precoding to precode uplink data, so that the uplink transmission performance of the terminal equipment is improved.

With reference to the first aspect, in certain implementations of the first aspect, the terminal device receives a first higher layer signaling, where the first higher layer signaling is used to configure subband precoding for the terminal device.

In the technical scheme, the precoding is configured for the terminal by using the high-layer signaling, so that the load of the DCI of the physical layer can be reduced, and the reliability of the system is improved.

With reference to the first aspect, in some implementations of the first aspect, the first DCI further includes subband precoding indication information; and the terminal device precodes uplink data transmitted in each of the one or more first antenna ports using subband precoding or wideband precoding according to the first DCI, including: and the terminal equipment performs precoding on uplink data transmitted in each antenna port according to the subband precoding indication information.

According to the technical scheme, the terminal equipment only needs to pre-code the uplink data transmitted in each antenna port according to the DCI indication information of the network equipment, does not need to judge which type of coding pre-coding is needed, is flexible to control and easy to realize, and improves the uplink transmission performance of the terminal equipment.

With reference to the first aspect, in certain implementations of the first aspect, the terminal device receives a second higher layer signaling, the second higher layer signaling being used to configure a code division multiplexing CDM group set for the terminal device, and the second higher layer signaling being used to determine a set of time units for the terminal device.

With reference to the first aspect, in some implementations of the first aspect, the terminal device determines, according to the one or more first antenna ports, a CDM group to which each of the one or more first antenna ports belongs; and the terminal device precoding uplink data transmitted in each of the one or more first antenna ports using sub-band precoding or wideband precoding, comprising: when a CDM group corresponding to a first antenna port belongs to a CDM group set and a first time unit belongs to a time unit set, precoding uplink data carried on the first antenna port by using sub-band precoding in the first time unit by the terminal equipment; when the CDM group corresponding to the first antenna port does not belong to the CDM group set and the first time unit belongs to the time unit set, the terminal device uses wideband precoding to precode uplink data carried on the antenna port in the first time unit.

In the technical scheme, the network equipment indicates the terminal equipment to respectively use the sub-band precoding and the broadband precoding under different conditions in an implicit indication mode, so that the uplink transmission performance of the terminal equipment is improved.

With reference to the first aspect, in some implementations of the first aspect, the terminal device obtains wideband precoding used for uplink transmission according to a first higher layer signaling or a first DCI.

With reference to the first aspect, in certain implementations of the first aspect, the first DCI message further includes a phase rotation indication value; the uplink data comprises demodulation reference signals (DMRS), and the terminal equipment rotates phases of different Resource Element (RE) groups in each precoding resource block (PRG) corresponding to the DMRS according to the phase rotation indicated value.

In the above technical solution, by rotating the phase of the RE group, the maximum DMRS port number that can be supported by the system can be multiplied.

In a second aspect, a method for sending a physical uplink shared channel is provided, including: the network equipment sends first Downlink Control Information (DCI) to the terminal equipment, wherein the first DCI is used for scheduling the terminal equipment to carry out uplink transmission on a first time unit and indicating one or more first antenna ports used by the uplink transmission of the terminal equipment; the network equipment receives a Physical Uplink Shared Channel (PUSCH) sent by the terminal equipment in a first time unit, wherein the PUSCH is generated by the terminal equipment according to the first DCI by precoding uplink data transmitted in each antenna port of one or more first antenna ports by using sub-band precoding or wideband precoding.

With reference to the second aspect, in some implementations of the second aspect, the network device sends a first higher layer signaling to the terminal device, where the first higher layer signaling is used to configure subband precoding for the terminal device.

With reference to the second aspect, in certain implementations of the first aspect, the first DCI further includes subband precoding indication information.

With reference to the second aspect, in some implementations of the second aspect, the network device sends second higher layer signaling to the terminal device, the second higher layer signaling being used to configure a code division multiplexing CDM group set for the terminal device, and the second higher layer signaling being used to determine a time unit set for the terminal device.

With reference to the second aspect, in some implementations of the second aspect, the first higher layer signaling or the first DCI includes wideband precoding used for uplink transmission.

With reference to the second aspect, in certain implementations of the second aspect, the first DCI message further includes a phase rotation indication value.

Regarding the technical effects of the second aspect or any possible implementation manner thereof, reference may be made to the description of the technical effects of the first aspect or any possible implementation manner thereof, which is not repeated here.

In a third aspect, a communication device is provided, the communication device having functionality to implement the method of the first aspect or any possible implementation thereof. The functions may be implemented by hardware, or may be implemented by hardware executing corresponding software. The hardware or software includes one or more units corresponding to the above functions.

In a fourth aspect, the present application provides a communications device having functionality to implement the method of the second aspect or any possible implementation thereof. The functions may be implemented by hardware, or may be implemented by hardware executing corresponding software. The hardware or software includes one or more units corresponding to the above functions.

In a fifth aspect, the present application provides a communications device comprising at least one processor coupled to at least one memory, the at least one memory to store a computer program or instructions, the at least one processor to invoke and run the computer program or instructions from the at least one memory, such that the communications device performs the method of the first aspect or any possible implementation thereof.

In one example, the communication device may be a terminal device.

In a sixth aspect, the present application provides a communications device comprising at least one processor coupled to at least one memory, the at least one memory to store a computer program or instructions, the at least one processor to invoke and run the computer program or instructions from the at least one memory, such that the communications device performs the method of the second aspect or any possible implementation thereof.

In one example, the communication device may be a network device.

In a seventh aspect, the present application provides a terminal device comprising a processor, a memory, and a transceiver. Wherein the memory is for storing a computer program, and the processor is for calling and running the computer program stored in the memory and controlling the transceiver to transceive signals to cause the communication device to perform the method as in the first aspect or any possible implementation thereof.

In an eighth aspect, the present application provides a network device comprising a processor, a memory, and a transceiver. Wherein the memory is for storing a computer program and the processor is for invoking and running the computer program stored in the memory and controlling the transceiver to transceive signals to cause the communication device to perform the method as in the second aspect or any possible implementation thereof.

In a ninth aspect, the present application provides a communications device comprising a processor and a communications interface for receiving a signal and transmitting the received signal to the processor, the processor processing the signal to cause the communications device to perform a method as in the first aspect or any possible implementation thereof.

In a tenth aspect, the present application provides a communications device comprising a processor and a communications interface for receiving a signal and transmitting the received signal to the processor, the processor processing the signal to cause the communications device to perform a method as in the second aspect or any possible implementation thereof.

Alternatively, the communication interface may be an interface circuit, an input/output interface, or the like, and the processor may be a processing circuit, a logic circuit, or the like.

Alternatively, the communication device of the ninth or tenth aspect may be a chip or an integrated circuit.

In an eleventh aspect, the present application provides a computer readable storage medium having stored therein computer instructions which, when run on a computer, cause the method as in the first aspect or any possible implementation thereof to be performed.

In a twelfth aspect, the present application provides a computer readable storage medium having stored therein computer instructions which, when run on a computer, cause the method as in the second aspect or any possible implementation thereof to be performed.

In a thirteenth aspect, the present application provides a computer program product comprising computer program code which, when run on a computer, causes the method as in the first aspect or any possible implementation thereof to be performed.

In a fourteenth aspect, the present application provides a computer program product comprising computer program code which, when run on a computer, causes the method as in the second aspect or any possible implementation thereof to be performed.

In a fifteenth aspect, the present application provides a wireless communication system comprising a terminal device according to the seventh aspect and/or a network device according to the eighth aspect.

Drawings

Fig. 1 is an exemplary architecture diagram of a communication system 100 suitable for use in embodiments of the present application.

Fig. 2 is a schematic diagram of an uplink DMRS pattern.

Fig. 3 is a schematic diagram of a plant macro-micro scenario suitable for use in embodiments of the present application.

Fig. 4 is a schematic interaction diagram of a method for transmitting a physical uplink shared channel according to the present application.

Fig. 5 is a schematic diagram of phase rotations of different "OCC-RE groups" of an uplink DMRS in a PRG with a frequency domain length of 2 RB.

Fig. 6 is a schematic block diagram of a communication device 1000 provided herein.

Fig. 7 is a schematic block diagram of a communication device 2000 provided herein.

Fig. 8 is a schematic structural diagram of the communication device 10 provided in the present application.

Fig. 9 is a schematic structural diagram of the communication device 20 provided in the present application.

Detailed Description

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

The technical solution of the embodiment of the application can be applied to various communication systems, for example: long term evolution (long term evolution, LTE) systems, LTE frequency division duplex (frequency division duplex, FDD) systems, LTE time division duplex (time division duplex, TDD), universal mobile telecommunications system (universal mobile telecommunication system, UMTS), worldwide interoperability for microwave access (worldwide interoperability for microwave access, wiMAX) telecommunications systems, fifth generation (5th generation,5G) systems or New Radio (NR), and other future evolution telecommunications systems, vehicle-to-other devices (vehicles-to-X V X), where V2X may include vehicle-to-internet (vehicle to network, V2N), vehicle-to-vehicle (V2V), vehicle-to-infrastructure (vehicle to infrastructure, V2I), vehicle-to-pedestrian (vehicle to pedestrian, V2P), etc., workshop communication long term evolution technology (long term evolution-vehicle, LTE-V), vehicle networking, machine-like communications (machine type communication, MTC), internet of things (internet of things), inter-machine communication long term evolution technology (long term evolution-machine, LTE-M), machine-to-machine (machine to machine, M2M), and the like.

Referring to fig. 1, fig. 1 is an exemplary architecture diagram of a communication system 100 suitable for use in embodiments of the present application. In the communication system 100 shown in fig. 1, a network device 110 and terminal devices 101 to 106 constitute one communication system 100. In the communication system 100, the network device 110 may transmit downlink data to the terminal devices 101 to 106, and the terminal devices 101 to 106 may transmit uplink data to the network device 110. In addition, the terminal devices 104 to 106 may constitute a communication system. In the communication system, the terminal device 105 can transmit downlink data to the terminal device 104 or the terminal device 106. It should be understood that the terminal device in the embodiment of the present application may also be referred to as: a User Equipment (UE), a Mobile Station (MS), a Mobile Terminal (MT), an access terminal, a subscriber unit, a subscriber station, a mobile station, a remote terminal, a mobile device, a user terminal, a wireless communication device, a user agent, or a user equipment, etc. Fig. 1 is a simplified schematic diagram merely as an example, and more or fewer network devices or terminal devices may be included in the communication system 100.

The terminal device may be a device providing voice/data connectivity to a user, e.g., a handheld device with wireless connectivity, an in-vehicle device, etc. Currently, examples of some terminal devices are: a mobile phone, a tablet, a laptop, a palmtop, a mobile internet device (mobile internet device, MID), a wearable device, a Virtual Reality (VR) device, an augmented reality (augmented reality, AR) device, a wireless terminal in industrial control (industrial control), a wireless terminal in unmanned (self driving), a wireless terminal in teleoperation (remote medical surgery), a wireless terminal in smart grid (smart grid), a wireless terminal in transportation security (transportation safety), a wireless terminal in smart city (smart city), a wireless terminal in smart home (smart home), a cellular phone, a cordless phone, a session initiation protocol (session initiation protocol, SIP) phone, a wireless local loop (wireless local loop, WLL) station, a personal digital assistant (personal digital assistant, PDA), a handheld device with wireless communication functionality, 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 communication network or a land-based communication network (public land mobile network) is not defined for this or any other communication system in the future application.

The wearable device can also be called as a wearable intelligent device, and is a generic name for intelligently designing daily wearing and developing wearable devices by applying a wearable technology, such as glasses, gloves, watches, clothes, shoes and the like. The wearable device is a portable device that is worn directly on the body or integrated into the clothing or accessories of the user. The wearable device is not only a hardware device, but also can realize a powerful function through software support, data interaction and cloud interaction. The generalized wearable intelligent device includes full functionality, large size, and may not rely on the smart phone to implement complete or partial functionality, such as: smart watches or smart glasses, etc., and focus on only certain types of application functions, and need to be used in combination with other devices, such as smart phones, for example, various smart bracelets, smart jewelry, etc. for physical sign monitoring.

In addition, in the embodiment of the application, the terminal device can also be a terminal device in an internet of things system, and the IoT is an important component of future information technology development, and the main technical characteristics of the terminal device are that the article is connected with a network through a communication technology, so that the man-machine interconnection and the intelligent network of the article interconnection are realized.

In addition, in the embodiment of the application, the terminal device may further include sensors such as an intelligent printer, a train detector, and a gas station, and the main functions include collecting data (part of the terminal device), receiving control information and downlink data of the network device, and transmitting electromagnetic waves to the network device to transmit uplink data.

The network device in the embodiment of the present application may be a device for communicating with a terminal device, which may be a base station (base transceiver station, BTS) in a global system for mobile communications (global system for mobile communications, GSM) or code division multiple access (code division multiple access, CDMA), a base station B (nodeB, NB) in a wideband code division multiple access (wideband code division multiple access, WCDMA) system, an evolved nodeB (eNB or eNodeB) in an LTE system, a radio controller in a cloud radio access network (cloud radio access network, CRAN) scenario, a radio network controller (radio network controller, RNC), a base station controller (base station controller, BSC), a home base station (e.g., home evolved nodeB, or home nodeB, HNB), a baseband unit, BBU), or the network device may be a relay station, an access point, a vehicle-mounted device, a wearable device, and a network device in a 5G network or a network device in a future evolved PLMN network, etc., may be an Access Point (AP) in a WLAN, a wireless relay node, a wireless backhaul node, a transmission point (transmission point, TP), or a transmission receiving point (transmission and reception point, TRP), etc., may be a gNB or a transmission point (TRP or TP) in an NR system, or one or a group (including multiple antenna panels) of antenna panels of a base station in a 5G system, or may also be a network node constituting a gNB or a transmission point, such as a baseband unit (BBU), or, distributed Units (DUs), etc., embodiments of the present application are not limited.

In a wireless communication system, communications can be classified into different types according to the kinds of transmitting nodes and receiving nodes. In general, the transmission of information from a network device to a terminal device is referred to as Downlink (DL) communication, and the transmission of information from a terminal device to a network device is referred to as Uplink (UL) communication. In the fifth generation wireless communication system, the NR system, can be divided into a plurality of radio frames in the time domain, each radio frame being 10ms long; one radio frame in turn comprises a plurality of time slots. One slot (slot) may include 14 orthogonal frequency division multiplexing (orthogonal frequency division multiplexing, OFDM) symbols.

The smallest resource granularity is one OFDM symbol in the time domain and one subcarrier in the frequency domain. One time-frequency Resource Element (RE) consisting of one OFDM symbol and one subcarrier is the smallest transmission unit RE in the time-frequency domain of signal transmission, and the physical layer takes RE as a basic unit when performing resource mapping. All OFDM symbols in one slot and 12 subcarriers in the frequency domain form one Resource Block (RB). The transmission direction of the OFDM symbols in one slot may be DL, UL, or flexible, and the transmission direction combination of the OFDM symbols in one slot may be understood as the format of the slot. For example, in the current TS 38.211 standard of NR, the format of several slots is specified, and the extract part is shown in table 1:

TABLE 1

In table 1, D stands for DL, U stands for UL, and X stands for flexible. Taking the timeslot format type number 27 as an example, the timeslot format represented by the format 27 is: the first 3 OFDM symbols perform DL transmission, the last 3 OFDM symbols are UL transmission, and the middle 8 OFDM symbols are flexible, i.e. uplink, possibly downlink, or not used for transmission. In the present application, a slot with a slot format type number of 0 is referred to as a downlink slot, and a slot with a slot format type number of 1 is referred to as an uplink slot. In general, in actual communication, slots in these two formats are mainly used.

Whether the UE transmits a physical uplink shared channel (physical uplink shared channel, PUSCH) to the gNB in an uplink slot or a physical downlink shared channel (physical downlink shared channel, PDSCH) to the UE in a downlink slot, the UE generally includes two parts: data and DMRS. The receiving end can demodulate the data only after correctly estimating the channel through the DMRS, so the DMRS is also an important part in data transmission.

Referring to fig. 2, fig. 2 (a) is a schematic diagram of an uplink DMRS pattern of type 1, and fig. 2 (b) is a schematic diagram of an uplink DMRS pattern of type 2. The uplink and downlink transmissions of NR support the same DMRS configuration, for example, as shown in fig. 2, in one RB, a transmission pattern in which DMRS are placed in the 3 rd, 4 th (corresponding to symbol numbers 2 and 3 in fig. 2) OFDM symbols may be used, whether PDSCH or PUSCH.

The two types of DMRS patterns differ mainly in the number of supported CDM groups, the type 1 uplink DMRS pattern supports 2 CDM groups (2 different filled lattices in fig. 2 (a) represent 2 CDM groups) and the type 2 uplink DMRS pattern supports 3 CDM groups (3 different filled lattices in fig. 2 (b) represent 3 CDM groups). By way of example and not limitation, the present application illustrates a DMRS pattern of type 2, but the embodiments of the present application are applicable to both type 1 and type 2, and the present application is not particularly limited thereto. The DMRS pattern of type 2 is configured with "double symbols" (symbols corresponding to sequence numbers 2 and 3), that is, the DMRS is composed of two symbols that are consecutive in the frequency domain, so that the DMRS occupies 24 REs in total in each RB. The 24 REs are divided into three groups as in (b) of fig. 2, i.e., three CDM groups; each group includes 8 REs, which are divided into two discontinuous "time-frequency continuous 4RE groups" in the frequency domain, and support 4 OCC orthogonal DMRS using the same superimposed orthogonal code (orthogonal cover code, OCC) sequence. The OCC orthogonality refers to a DMRS transmission scheme in which the same DMRS base sequence is multiplied by different OCC sequences, respectively, so that orthogonality is achieved. For example: the same DMRS base sequence is denoted as [ s1s2s3s4 … … ], and four sets of orthogonal OCCs are: [1, 1], [1, -1, -1], [1, -1,1], then the 4 OCC orthogonal DMRS are respectively: [ s1, s2, s3, s4, … … ], [ s1, -s2, s3, -s4, … … ], [ s1, s2, -s3, -s4, … … ], [ s1, -s2, -s3, s4, … … ].

Note that the OCC sequences used in the "time-frequency continuous 4RE group" of one DMRS at different frequency domain positions are the same. Thus, even with more "4RE groups," only 4 OCC orthogonal DMRSs can still be supported. In addition, some non-idealities in the actual scenario can affect the orthogonality of the OCCs described above. OCC non-orthogonality due to timing advance misalignment is considered in this application. At this time, DMRSs among CDM groups remain orthogonal, but DMRSs within a group that were originally orthogonal to OCCs become no longer orthogonal.

NR supports TDD. Specifically, the network device may implement TDD by alternately configuring uplink slots and downlink slots on the same one carrier. The proportion of the downlink slot and the uplink slot of the time domain is called as the uplink-downlink proportion of the TDD. For example, 8:2 is a very common TDD uplink-downlink proportioning scheme in the existing network, that is, each 10 slots contains 8 consecutive downlink slots followed by 2 consecutive uplink slots. The number of downlink slots in the ratio is far greater than that of uplink slots, because the general cell mainly has downlink service, but the existence of cells mainly having uplink service is not excluded, for example, the method is suitable for factory microcells in factory scenes.

Referring to fig. 3, fig. 3 is a schematic diagram of a plant macro-micro scenario suitable for use in embodiments of the present application. The scene comprises two cells, namely a macrocell and a microcell. The key network elements involved in the scenario include: macro base station (macro station for short), macro UE, micro base station (micro station for short), micro UE. The critical links involved include two: the uplink from the micro UE to the micro station represented by the solid line 1 in the micro cell, on which the micro UE mainly transmits uplink data to the micro station; and the second is the macro-to-micro downlink (which may be referred to herein as downlink by the micro-station as a UE of the macro-station), represented by the dashed line 2, on which the macro-station is transmitting downlink data, and the micro-station may be interfered by the macro-station downlink data. As an example, in a factory microcell, each high-definition camera (i.e., an example of a micro UE) performs video monitoring corresponding to a machine to determine whether the machine is operating normally. This makes the primary direction of traffic in the factory microcell upstream, i.e. the camera transmits real-time recorded video to the network device. In order to meet the uplink service requirement, the uplink and downlink proportion of the microcell is mainly uplink slot.

In this scenario, the macro station uses a conventional more-to-less-more-up-down-mix (e.g., outdoor 5 slots are DSUDD in fig. 3, S are dedicated frames, which can be understood as D), and the micro station uses a more-to-less-up-down-mix (e.g., indoor 5 slots are USUUU in fig. 3). This results in a downlink for the macro station but an uplink for the micro station for the same slot (e.g. 1, 4, 5 th slot). As an example and not by way of limitation, the slots 1, 4, 5 in the above example are referred to as macro-micro heterogeneous slots, and may be simply referred to as heterogeneous slots. The macro station sends downlink data to macro UE served by the macro station in different proportions slot, and the downlink data is just received by a micro station which is about to receive uplink data sent by micro UE, so that adjacent cell interference is caused. In a typical factory macro-micro scene, the micro station receives the level of the co-frequency interference of the macro station, namely-50 dBm, and certain technical means are required to perform the interference elimination of the co-frequency interference, namely-50 dBm, so as to meet the expected interference level of factory capacity, namely-90 dBm, and at the moment, the micro station needs to accurately estimate the channel of downlink data sent by the transmitting end macro station. At the receiving end of the micro station, an iterative interference elimination algorithm can be adopted to eliminate the co-channel interference caused by the downlink data of the macro station, and a better interference elimination effect can be obtained.

The precoding of the transmitting end and the channel estimation of the receiving end can be divided into a sub-band and a wideband, wherein the sub-band and the wideband are different in that the sub-band is in granularity of precoding resource group (precoding resource group, PRG) (for example, 1 PRG=2 or 4 RBs in NR standard), and the sub-band is independently operated in each PRG; while broadband is a unified operation across all resources that are scheduled. The following three precoding+channel estimation combinations are selected in the practical system: subband precoding + subband channel estimation, wideband precoding + subband channel estimation or wideband precoding + wideband channel estimation. The sub-band coding is a coding method based on signal spectrum, i.e. the signal is decomposed into different frequency band components to remove signal correlation, then the components are sampled, quantized and coded respectively, so as to obtain a group of mutually uncorrelated code words which are combined together for transmission, and the sub-band precoding has the advantages that the channel information on each PRG in a frequency selective channel is fully utilized, and the precoding is independently designed for each PRG, so that the precoding performance is optimal. The broadband precoding has the advantage that the receiving end can use broadband channel estimation, and the noise immunity of the channel estimation is higher. From the above analysis, it can be seen that the advantages of wideband precoding + subband channel estimation are not obvious, so that in a typical practical system, both precoding and channel estimation are wideband or subband.

In general, if the DMRS transmit energy is sufficient (gNB generally meets this condition), or if the DMRS is subject to complex (different interference on different frequencies) interference, the performance of the subband channel estimation will not be significantly worse than wideband, so in this case subband precoding is generally used; in contrast, if the DMRS transmit energy is insufficient (UE) and the interference is single, the subband channel estimation performance may be too poor and even the full gain of "subband precoding" is consumed, so in this case wideband precoding is generally used.

From the above, in the factory macro-micro scenario, the macro station downlink may use subband precoding, while the micro UE uplink may use wideband precoding. However, if the macro station downlink DMRS and the micro UE uplink DMRS collide on the different slots and the same CDM group is used, the macro station downlink DMRS and the micro UE uplink DMRS interfere with each other. At this time, the micro UE wideband precoding is no longer advantageous in performance due to the complex interference from the macro station downlink.

Next, the technical scheme of the present application is described.

Referring to fig. 4, fig. 4 is a schematic interaction diagram of a method for transmitting a physical uplink shared channel according to the present application.

S410, the terminal equipment receives the first DCI sent by the network equipment.

Correspondingly, the network device sends the first DCI to the terminal device. The first DCI is used to schedule the terminal device to perform uplink transmission on the first time unit and instruct one or more antenna ports used for uplink transmission of the terminal device.

By way of example, and not limitation, the network device and the terminal device in the present embodiment are illustrated with a micro station and a micro UE in a factory macro-micro scenario, respectively.

Optionally, the first time unit is a differential proportion time slot of the macro station and the micro station in the same time slot period.

S420, the terminal equipment uses sub-band precoding or wideband precoding to precode uplink data transmitted in each of one or more antenna ports according to the first DCI, and generates a Physical Uplink Shared Channel (PUSCH).

It should be understood that the uplink data includes DMRS.

Optionally, before S420, the method further includes: the micro station transmits a first high-layer signaling to the micro UE, wherein the first high-layer signaling is used for configuring coding parameters of subband precoding for the micro UE. The use of higher layer signaling (rather than physical layer signaling notification) can reduce the load of the physical layer DCI and improve the system reliability.

Optionally, the first higher layer signaling is divided into two parts, the first part configures PRG size (e.g. prg=4 RB) for the micro UE, and the second part configures precoding used on all PRGs for the micro UE. Assuming a total system bandwidth of 40MHz (100 RBs), the PRGs total 100/4=25. The second part of the first higher layer signaling is also divided into 25 parts in a one-to-one correspondence, each part being used to configure precoding on a corresponding PRG. Assuming that each precoding uses a 6bit configuration, optionally, the codebook used by each precoding (i.e. the correspondence between 6bit information and subband precoding) is predefined by the micro UE and the micro station in advance, the second part of the first higher layer signaling occupies 25×6=150 bits in total.

Alternatively, the wideband precoding may be indicated by precoding matrix information (precoding matrix indicator, PMI) indication field in the first DCI as in the existing standard. Thus, the control of the micro station on the micro UE precoding is more flexible, the micro station can timely change the micro UE precoding according to the specific multi-user multiplexing condition of the scheduling subframe, the mutual interference among a plurality of micro UEs is avoided, and the total throughput of the network is improved.

Since the micro UE needs to know the exact number of bits of the DCI before acquiring the information in the first DCI, if the DCI corresponding to wideband precoding includes a PMI indication field, the DCI corresponding to subband precoding also includes the indication field, so that the length of the DCI is a constant value in each case. Thus, optionally, in order not to waste this indication field in the subband precoding DCI. The UE may be configured with multiple sets of subband precoding in the first higher layer signaling, and which set the UE uses specifically may be indicated by the PMI indication field.

Alternatively, wideband precoding may also be configured by the first higher layer signaling. In this way, no indication precoding (i.e. in either case, configured by the first higher layer signaling) is required in the first DCI, so that the DCI load is reduced and the system reliability is improved.

In one implementation, the first DCI further includes subband precoding indication information, and the micro UE precodes uplink data transmitted in each of the one or more antenna ports according to the subband precoding indication information.

The subband precoding indication information is illustrated below.

Example 1: the subband precoding indication information comprises a 1bit precoding type indication field, the bit field has a value of 0 or 1, and the value represents that all antenna ports use subband precoding or wideband precoding respectively.

Example 2: the subband precoding indication information includes N (n≡1) bits (bits), where N is the maximum number of antenna ports supported by uplink transmission configured by higher layer signaling. The value of the ith (1.ltoreq.i.ltoreq.N) bit is 0 or 1, representing that the ith antenna port uses subband precoding or wideband precoding. For antenna ports not scheduled by the DCI, for example, the DCI only schedules uplink transmission to use M antenna ports, and M < N, the value of the first M bits of the subband precoding indication information is 0 or 1, which represents that the corresponding antenna ports use subband precoding or wideband precoding; the latter N-M bits are set to zero, which is advantageous for the UE to determine whether the DCI is received correctly.

In the implementation mode, the UE only needs to pre-code the uplink data transmitted in each antenna port according to the DCI indication information of the base station, does not need to judge which coding pre-coding type needs to be used, is flexible in base station control and easy to realize, and improves the uplink transmission performance of the micro-UE.

In another implementation, the micro UE receives second higher layer signaling sent by the micro station, the second higher layer signaling configured to configure a CDM group set for the micro UE, and the second higher layer signaling configured to determine a set of time units for the micro UE.

It should be understood that the set of time units herein is a set of heterogeneous proportion slots of macro and micro stations. In the following, an example is given of how the set of heterogeneous slots is determined by means of the second signalling.

Example 1: the micro station acquires that macro stations nearby the factory adopt 8:2 (dddddddddduu). The micro station configures uplink and downlink proportion 2 for the micro UE through a second high-layer signaling: 3 (DDUUUDDUUU) and informs the macro station in the vicinity of the micro UE factory of the uplink/downlink matching. And the micro UE determines a time unit set of time slots with different proportions in an uplink period and a downlink period formed by every 10 time slots according to the uplink and downlink proportions of the macro station and the micro station in the second high-level signaling, wherein the time unit set comprises the 3 rd, 4 th, 5 th and 8 th time slots, and the micro UE needs to judge whether sub-band precoding is needed to be used or not in the time slot sets according to antenna ports.

Example 2: the micro station acquires that macro stations nearby the factory adopt 8:2 (dddddddddduu). The micro station configures uplink and downlink proportion 2 for the micro UE through a second high-layer signaling: 3 (DDUUUDDUUU), and the micro station directly configures a time unit set of different proportion time slots in an uplink and downlink period formed by every 10 time slots for the micro UE through the second high-level signaling, where the time unit set includes the 3 rd, 4 th, 5 th and 8 th time slots, and the micro UE needs to determine whether to use sub-band precoding according to the antenna ports in the time slot sets.

It should be noted that, since there may be multiple antenna ports used for uplink transmission of the micro UE and the multiple antenna ports may belong to different CDM groups, the micro UE needs to determine, according to the antenna ports, the CDM group to which each antenna port to be scheduled belongs, for example: for any one of the one or more antenna ports X (i.e., one example of the first antenna port), the corresponding CDM group is denoted as CDM group Y.

Specifically, when CDM group Y belongs to a CDM group set and the first time unit belongs to a time unit set, the micro UE precodes uplink data carried on antenna port X in the first time unit using subband precoding; when CDM group Y does not belong to the CDM group set and the first time unit belongs to the time unit set, the micro UE precodes uplink data carried on antenna port X using wideband precoding in the first time unit.

In the same-proportioned time slot, i.e. when the first time unit does not belong to the time unit set:

in one implementation, micro UE uplink transmission uses wideband precoding;

in another possible implementation, the micro station configures a second CDM group set for the micro UE; when the CDM group Y belongs to the second CDM group set and the first time unit does not belong to the time unit set, the micro UE uses sub-band precoding to precode uplink data carried on the antenna port X in the first time unit; when CDM group Y does not belong to the second CDM group set and the first time unit does not belong to the time unit set, the micro UE precodes uplink data carried on antenna port X using wideband precoding in the first time unit.

The following illustrates how to determine the precoding type when the micro UE uses different antenna ports for uplink transmission.

For example: the micro station acquires downlink data sent by macro stations near the factory on antenna ports 1000 and 1001 and 1004 and 1005 through information interaction between the micro station and the macro station, and the interference to the factory is maximum. The micro station searches according to the standard, and antenna ports 1000 and 1001 and 1004 and 1005 belong to CDM group 0 and CDM group 2, respectively. The micro station configures a CDM group set A for the micro UE through a second high layer signaling, wherein the CDM group set comprises CDM group 0 and CDM group 2. In addition, the micro station also determines a heterogeneous proportion time slot set B for the micro UE through a second high-layer signaling.

Case 1

Assuming that the antenna ports used for the micro UE uplink transmission indicated in the first DCI are 1006 and 1007, it is known that the antenna port used by the micro UE belongs to CDM group 0, that is, CDM group 0 belongs to CDM group set a. In this case, the micro UE determines, through the heterogeneous timeslot set B, whether the scheduled first time unit is a heterogeneous timeslot, and when the first time unit is a heterogeneous timeslot, the micro UE precodes uplink data carried on the antenna ports 1006 and 1007 in the first time unit using subband precoding; otherwise wideband precoding is used. Optionally, the micro UE may learn, according to the resource allocation indication field in the first DCI, that the micro UE schedules the micro UE to send PUSCH on RB0 to RB19, and the micro UE obtains that RB0 to 19 belong to PRGs 0 to 4 according to the PRG size configured for subband precoding in the first higher layer signaling and precoding used on all PRGs, and further precodes uplink data that needs to be sent by the micro UE by respectively using subband precoding corresponding to PRGs 0 to 4, so as to obtain PUSCH.

Case 2

Assuming that antenna ports 1008 and 1009 used for the micro UE uplink transmission indicated in the first DCI are determined by the micro UE to belong to CDM group 1, that is, CDM group 1 does not belong to CDM group set a, the micro UE precodes uplink data carried on antenna ports 1008 and 1009 using wideband precoding in the first time unit, to obtain PUSCH.

Alternatively, the micro UE configures the precoding type (i.e., sub-band precoding or wideband precoding) using wideband precoding or by higher layer signaling when the first time unit does not belong to the set of time units.

Optionally, the first DCI further includes a phase rotation instruction value θ (θ is greater than or equal to 0 and less than or equal to pi), and the micro UE rotates phases of different "OCC-RE groups" of the uplink DMRS in each PRG according to the phase rotation instruction value. The "OCC-RE group" refers to a set of a plurality of REs carrying DMRSs in a PRG, where the plurality of DMRSs are weighted by a same OCC sequence, and the OCC sequence includes a time domain OCC sequence and a frequency domain OCC sequence, which are used to jointly estimate a channel of a port on the RE group, and are orthogonal to a code domain formed by DMRSs weighted by other OCC sequences in the OCC. Referring to fig. 5, fig. 5 (a) is a schematic diagram of phase rotations of different "OCC-RE groups" of the type 1 uplink DMRS in one PRG with a frequency domain length of 2RB, and fig. 5 (b) is a schematic diagram of phase rotations of different "OCC-RE groups" of the type 2 uplink DMRS in one PRG with a frequency domain length of 2 RB. Specifically, as shown in FIG. 5 (b), 4 RE's filled in the same way and consecutive represent one "OCC-RE group", the kth (k.gtoreq.0) group "OCC-RE group", the rotation phase 2πkθ, i.e., represents multiplication of exp (j 2 πkθ) on the transmission signal of 4 RE's, where j is an imaginary unit, j ² = -1. Thus, the maximum number of DMRS ports which can be supported by the system is multiplied, for example, θ=0, 1/3 and 2/3 are configured for different DMRSs, and the maximum number of DMRSs supported by the system can be increased by three times.

Optionally, the first DCI further includes a phase rotation instruction value set Θ= { θ ₀ ,θ ₁ ,…,θ _M-1 And the M phase rotation indication values contained in the antenna ports are respectively in one-to-one correspondence with the M antenna ports of the micro UE. And the micro UE rotates the antenna ports at the phases of different OCC-RE groups of the DMRS corresponding to each PRG according to the phase rotation indicated value corresponding to each antenna port. Specifically, as shown in fig. 5 (a), 2x REs which are filled identically and are continuous in time and frequency domain represent one "OCC-RE group", where x is the number of symbols for transmitting DMRS. As also shown in fig. 5 (b), 2x REs, which are filled identically and have continuous time domains and frequency domains at the symbols 4n+i and 4n+i+2, represent one "OCC-RE group", where i=0 or 1, and x is the number of symbols transmitting DMRS. DMRS of one antenna port carried on kth (k is more than or equal to 0) group 'OCC-RE group', rotation phase 2pi k theta ₀ That is, the transmission signal of 2x REs is multiplied by exp (j 2 pi k theta ₀ ) Where j is an imaginary unit, j ² = -1. This allows the maximum number of DMRS ports that the system can support to be multiplied, e.g., configuring θ for different DMRS ₀ =0, 1/3, 2/3, the maximum DMRS number supported by the system can be increased by three times.

In the implementation mode, the micro station indicates the micro UE to respectively use the sub-band precoding and the broadband precoding under different conditions in an implicit indication mode, so that the uplink transmission performance of the micro UE is improved.

And S430, the terminal equipment sends the PUSCH to the network equipment in the first time unit.

The method of precoding provided by the present application is described in detail above, and the communication device provided by the present application is described below.

Referring to fig. 6, fig. 6 is a schematic block diagram of a communication device 1000 provided herein. As shown in fig. 6, the communication apparatus 1000 includes a receiving unit 1100, a processing unit 1200, and a transmitting unit 1300.

A receiving unit 1100, configured to receive first downlink control information DCI, where the first DCI is used to schedule a terminal device to perform uplink transmission on a first time unit and instruct one or more first antenna ports used for uplink transmission of the terminal device; a processing unit 1200, configured to precode uplink data transmitted in each of the one or more first antenna ports according to the first DCI using subband precoding or wideband precoding, to generate a physical uplink shared channel PUSCH; a transmitting unit 1300, configured to transmit the PUSCH to a network device in the first time unit.

Optionally, in an embodiment, the receiving unit 1100 is further configured to receive a first higher layer signaling, where the first higher layer signaling is used to configure subband precoding for the terminal device.

Optionally, in one embodiment, the first DCI further includes subband precoding indication information; the processing unit is specifically configured to: and precoding uplink data transmitted in each antenna port according to the subband precoding indication information.

Optionally, in an embodiment, the receiving unit 1100 is further configured to receive a second higher layer signaling, where the second higher layer signaling is used to configure a CDM group set for the terminal device, and the second higher layer signaling is used to determine a time unit set for the terminal device.

Optionally, in one embodiment, the processing unit 1200 is further configured to determine, according to the one or more first antenna ports, a CDM group to which each of the one or more first antenna ports belongs; the processing unit is specifically configured to: when a CDM group corresponding to the first antenna port belongs to the CDM group set and the first time unit belongs to the time unit set, precoding uplink data carried on the first antenna port by using sub-band precoding in the first time unit; and when the CDM group corresponding to the first antenna port does not belong to the CDM group set and the first time unit belongs to the time unit set, precoding uplink data carried on the antenna port by using wideband precoding in the first time unit.

Optionally, in an embodiment, the receiving unit 1100 is further configured to obtain the wideband precoding used for uplink transmission according to the first higher layer signaling or the first DCI.

Optionally, in one embodiment, the first DCI message further includes a phase rotation indication value; the uplink data includes a demodulation reference signal DMRS, and the processing unit 1200 is further configured to rotate phases of different resource element RE groups in each precoding resource block PRG corresponding to the DMRS according to the phase rotation indication value.

Alternatively, in the above embodiments, the receiving unit 1100 and the transmitting unit 1300 may be integrated into one transceiver unit, which has both functions of receiving and transmitting, which is not limited herein.

In one implementation, the communication apparatus 1000 may be a terminal device in a method embodiment, in which implementation the receiving unit 1100 may be a receiver and the transmitting unit 1300 may be a transmitter. The receiver and the transmitter may also be integrated into one transceiver. The processing unit 2100 can be a processing device.

In another implementation, the communications apparatus 1000 may be a chip or integrated circuit mounted in a terminal device. In such an implementation, the receiving unit 1100 and the transmitting unit 1300 may be communication interfaces or interface circuits. For example, the receiving unit 1100 is an input interface or an input circuit, and the transmitting unit 1300 is an output interface or an output circuit. The processing unit 1200 may be a processing device.

The functions of the processing device may be implemented by hardware, or may be implemented by executing corresponding software by hardware. For example, the processing device may include at least one processor and at least one memory, where the at least one memory is configured to store a computer program, and the at least one processor reads and executes the computer program stored in the at least one memory, so that the communications device 1000 performs operations and/or processes that are required to be performed by the terminal device in the method embodiments. In the alternative, the processing means may comprise only a processor, the memory for storing the computer program being located outside the processing means. The processor is connected to the memory through circuitry/wiring to read and execute the computer program stored in the memory. As another example, the processing device may be a chip or an integrated circuit.

Referring to fig. 7, fig. 7 is a schematic block diagram of a communication device 2000 provided herein. As shown in fig. 7, the communication apparatus 2000 includes a transmitting unit 2100 and a receiving unit 2200.

A sending unit 2100, configured to send first downlink control information DCI to a terminal device, where the first DCI is used to schedule the terminal device to perform uplink transmission on a first time unit and indicate one or more first antenna ports used for uplink transmission of the terminal device; a receiving unit 2200, configured to receive, in the first time unit, a physical uplink shared channel PUSCH transmitted by the terminal device, where the PUSCH is generated by the terminal device by precoding uplink data transmitted in each of the one or more first antenna ports using subband precoding or wideband precoding according to the first DCI.

Optionally, in an embodiment, the sending unit 2100 is further configured to send a first higher layer signaling to the terminal device, where the first higher layer signaling is used to configure subband precoding for the terminal device.

Optionally, in one embodiment, the first DCI further includes subband precoding indication information.

Optionally, in an embodiment, the sending unit 2100 is further configured to send a second higher layer signaling to the terminal device, where the second higher layer signaling is used to configure a CDM group set for the terminal device, and the second higher layer signaling is used to determine a time unit set for the terminal device.

Optionally, in one embodiment, the first higher layer signaling or the first DCI includes the wideband precoding used for uplink transmission.

Optionally, in one embodiment, the first DCI further includes a phase rotation indicator value.

Optionally, the communication apparatus 2000 may further comprise a processing unit 2300 for performing processing actions performed by the network device.

Alternatively, in the above embodiments, the transmitting unit 2100 and the receiving unit 2200 may be integrated into one transceiver unit, and have both functions of receiving and transmitting, which is not limited herein.

In one implementation, the communication apparatus 2000 may be a network device in a method embodiment. In this case, the receiving unit 2200 may be a receiver, and the transmitting unit 2100 may be a transmitter. The receiver and the transmitter may also be integrated into one transceiver.

In another implementation, the communication apparatus 2000 may be a chip or an integrated circuit in a network device. In this case, the transmitting unit 2100 and the receiving unit 2200 may be communication interfaces or interface circuits. For example, the receiving unit 2200 is an input interface or an input circuit, the transmitting unit 2100 is an output interface or an output circuit, and the processing unit 2300 may be a processing device.

The processing unit 2300 may be a processing device. The functions of the processing device may be implemented by hardware, or may be implemented by executing corresponding software by hardware. For example, the processing means may comprise at least one processor and at least one memory, wherein the at least one memory is configured to store a computer program, the at least one processor reading and executing the computer program stored in the at least one memory, such that the communications means 2000 performs the operations and/or processes performed by the network device in the various method embodiments. In the alternative, the processing means may comprise only a processor, the memory for storing the computer program being located outside the processing means. The processor is connected to the memory through circuitry/wiring to read and execute the computer program stored in the memory. Also for example: the processing means may also be a chip or an integrated circuit.

Referring to fig. 8, fig. 8 is a schematic structural diagram of a communication device 10 provided herein. As shown in fig. 8, the communication apparatus 10 includes: one or more processors 11, one or more memories 12, and one or more communication interfaces 13. The processor 11 is configured to control the communication interface 13 to send and receive signals, the memory 12 is configured to store a computer program, and the processor 11 is configured to call and run the computer program from the memory 12, so that the processes and/or operations performed by the terminal device in the method embodiments of the present application are performed.

For example, the processor 11 may have the functions of the processing unit 1200 shown in fig. 6, and the communication interface 13 may have the functions of the receiving unit 1100 and/or the transmitting unit 1300 shown in fig. 6. In particular, the processor 11 may be configured to perform the processing or operations performed internally by the terminal device in the above-described method embodiments, and the communication interface 13 is configured to perform the transmitting and/or receiving actions performed by the terminal device in the above-described method embodiments.

In one implementation, the communication interface 13 in the communication device 10 may be a transceiver. The transceiver may include a receiver and a transmitter. Alternatively, the processor 11 may be a baseband device and the communication interface 13 may be a radio frequency device. In another implementation, the communication device 10 may be a chip or an integrated circuit. In such an implementation, the communication interface 13 may be an interface circuit or an input/output interface.

Referring to fig. 9, fig. 9 is a schematic structural diagram of a communication device 20 provided in the present application. As shown in fig. 9, the communication device 20 includes: one or more processors 21, one or more memories 22, and one or more communication interfaces 23. The processor 21 is used for controlling the communication interface 23 to send and receive signals, the memory 22 is used for storing a computer program, and the processor 21 is used for calling and running the computer program from the memory 22, so that the flow and/or operation performed by the network device in the method embodiments of the present application are performed.

For example, the processor 21 may have the function of the processing unit 2100 shown in fig. 7, and the communication interface 23 may have the function of the receiving unit 2200 and/or the transmitting unit 2100 shown in fig. 7. In particular, the processor 21 may be configured to perform the processing or operations performed internally by the network device in the above-described method embodiments, and the communication interface 23 is configured to perform the sending and/or receiving actions performed by the network device in the above-described method embodiments.

In one implementation, the communication apparatus 20 may be a network device in a method embodiment. In such an implementation, the communication interface 23 may be a transceiver. The transceiver may include a receiver and a transmitter. Alternatively, the processor 21 may be a baseband device and the communication interface 23 may be a radio frequency device. In another implementation, the communication apparatus 20 may be a chip or an integrated circuit mounted in a network device. In such an implementation, the communication interface 23 may be an interface circuit or an input/output interface.

In the embodiments of the apparatus, the memory and the processor may be physically separate units, or the memory may be integrated with the processor, which is not limited herein.

Furthermore, the present application also provides a computer readable storage medium, where computer instructions are stored, when the computer instructions run on a computer, to cause operations and/or flows performed by a terminal device in the method embodiments of the present application to be performed.

The present application also provides a computer-readable storage medium having stored therein computer instructions that, when executed on a computer, cause operations and/or flows performed by a network device in method embodiments of the present application to be performed.

Furthermore, the present application also provides a computer program product comprising computer program code or instructions which, when run on a computer, cause operations and/or flows performed by the terminal device in the method embodiments of the present application to be performed.

The present application also provides a computer program product comprising computer program code or instructions which, when run on a computer, cause operations and/or flows performed by network devices in the method embodiments of the present application to be performed.

In addition, the application also provides a chip, wherein the chip comprises a processor. The memory for storing the computer program is provided separately from the chip and the processor is adapted to execute the computer program stored in the memory such that the operations and/or processes performed by the terminal device in any of the method embodiments are performed.

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

The present application also provides a chip including 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 such that the operations and/or processes performed by the network device in any of the method embodiments are performed.

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

In addition, the application also provides a communication system which comprises the terminal equipment and the network equipment in the embodiment of the application.

The processor in the embodiments of the present application may be an integrated circuit chip with the capability of processing signals. In implementation, the steps of the above method embodiments may be implemented by integrated logic circuits of hardware in a processor or instructions in software form. The processor may be a general purpose processor, a digital signal processor (digital signal processor, DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (field programmable gate array, FPGA) or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component. 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 as a hardware encoding processor executing, or may be implemented by a combination of hardware and software modules in the encoding processor. The software modules may be located in a random access memory, flash memory, read only memory, programmable read only memory, or electrically erasable programmable memory, registers, etc. as well known in the art. The storage medium is located in a memory, and the processor reads the information in the memory and, in combination with its hardware, performs the steps of the above method.

The memory in embodiments of the present application may be either volatile memory or nonvolatile memory, or may include both volatile and nonvolatile memory. The nonvolatile 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. The volatile memory may be random access memory (random access memory, RAM) which acts as an external cache. By way of example, and not limitation, many forms of RAM are available, such as Static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchronous DRAM (SLDRAM), and direct memory bus 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. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

It will be clear to those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described systems, apparatuses and units may refer to corresponding procedures in the foregoing method embodiments, and are not repeated herein.

In the several embodiments provided in this application, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of the units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.

The units described as separate units may or may not be physically separate, and units shown 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 units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

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

The term "and/or" in this application is merely an association relation describing an associated object, and indicates that three relations may exist, for example, a and/or B may indicate: a exists alone, A and B exist together, and B exists alone. Wherein, A, B and C can be singular or plural, and are not limited.

In the embodiments of the present application, the words "first," "second," and the like are used to distinguish between identical or similar items that have substantially the same function and effect. It will be appreciated by those of skill in the art that the words "first," "second," and the like do not limit the amount and order of execution, and that the words "first," "second," and the like do not necessarily differ.

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 may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in the embodiments of the present application.

The foregoing is merely 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 think about changes or substitutions within the technical scope of the present application, and the changes and substitutions are intended to 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 (30)

1. A method for transmitting a physical uplink shared channel, comprising:

   the method comprises the steps that terminal equipment receives first Downlink Control Information (DCI), wherein the first DCI is used for scheduling the terminal equipment to carry out uplink transmission on a first time unit and indicating one or more first antenna ports used by the uplink transmission of the terminal equipment;

   The terminal equipment uses sub-band precoding or wideband precoding to precode uplink data transmitted in each antenna port of the one or more first antenna ports according to the first DCI, and generates a Physical Uplink Shared Channel (PUSCH);

   and the terminal equipment sends the PUSCH to network equipment in the first time unit.
2. The method according to claim 1, wherein the method further comprises:

   the terminal equipment receives a first high-layer signaling, wherein the first high-layer signaling is used for configuring sub-band precoding for the terminal equipment.
3. The method of claim 1 or 2, wherein the first DCI further comprises subband precoding indication information; and

   the terminal device uses sub-band precoding or wideband precoding to precode uplink data transmitted in each of the one or more first antenna ports according to the first DCI, including:

   and the terminal equipment performs precoding on uplink data transmitted in each antenna port according to the subband precoding indication information.
4. The method according to claim 1 or 2, characterized in that the method further comprises:

   The terminal device receives a second higher layer signaling, the second higher layer signaling configured to configure a code division multiplexing, CDM, group set for the terminal device, and the second higher layer signaling configured to determine a time unit set for the terminal device.
5. The method according to claim 4, wherein the method further comprises:

   the terminal equipment determines CDM groups to which each antenna port of the one or more first antenna ports belongs according to the one or more first antenna ports; and

   the terminal device uses sub-band precoding or wideband precoding to precode uplink data transmitted in each of the one or more first antenna ports, including:

   when the CDM group corresponding to the first antenna port belongs to the CDM group set and the first time unit belongs to the time unit set, the terminal equipment uses subband precoding to precode uplink data carried on the first antenna port in the first time unit;

   when the CDM group corresponding to the first antenna port does not belong to the CDM group set and the first time unit belongs to the time unit set, the terminal device uses wideband precoding to precode uplink data carried on the antenna port in the first time unit.
6. The method according to any one of claims 2-5, further comprising:

   and the terminal equipment acquires the broadband precoding used for uplink transmission according to the first high-layer signaling or the first DCI.
7. The method of any one of claims 1-6, wherein the first DCI message further includes a phase rotation indication value;

   the uplink data comprises demodulation reference signals DMRS,

   and the terminal equipment rotates the phases of different resource element RE groups in each precoding resource block PRG corresponding to the DMRS according to the phase rotation indicated value.
8. A method for transmitting a physical uplink shared channel, comprising:

   the network equipment sends first Downlink Control Information (DCI) to the terminal equipment, wherein the first DCI is used for scheduling the terminal equipment to carry out uplink transmission on a first time unit and indicating one or more first antenna ports used by the uplink transmission of the terminal equipment;

   the network device receives a physical uplink shared channel PUSCH transmitted by the terminal device in the first time unit, wherein,

   the PUSCH is generated by the terminal device precoding uplink data transmitted in each of the one or more first antenna ports using subband precoding or wideband precoding according to the first DCI.
9. The method of claim 8, wherein the method further comprises:

   the network device sends a first higher layer signaling to the terminal device, where the first higher layer signaling is used to configure subband precoding for the terminal device.
10. The method of claim 8 or 9, wherein the first DCI further includes subband precoding indication information.
11. The method according to claim 8 or 9, characterized in that the method further comprises:

    the network device sends a second higher layer signaling to the terminal device, the second higher layer signaling being used to configure a code division multiplexing, CDM, group set for the terminal device, and the second higher layer signaling being used to determine a time unit set for the terminal device.
12. The method according to any of claims 9-11, wherein the first higher layer signaling or the first DCI comprises the wideband precoding used for uplink transmission.
13. The method of any of claims 8-12, wherein the first DCI message further includes a phase rotation indication value.
14. A communication device, comprising:

    a receiving unit, configured to receive first downlink control information DCI, where the first DCI is used to schedule a terminal device to perform uplink transmission on a first time unit, and instruct one or more first antenna ports used for uplink transmission of the terminal device;

    A processing unit, configured to precode uplink data transmitted in each of the one or more first antenna ports using subband precoding or wideband precoding according to the first DCI, to generate a physical uplink shared channel PUSCH;

    and the sending unit is used for sending the PUSCH to the network equipment in the first time unit.
15. The communications apparatus of claim 14, wherein the receiving unit is further configured to receive first higher layer signaling configured to configure subband precoding for the terminal device.
16. The communication apparatus according to claim 14 or 15, wherein the first DCI further comprises subband precoding indication information;

    the processing unit is specifically configured to: and precoding uplink data transmitted in each antenna port according to the subband precoding indication information.
17. The communication apparatus according to claim 14 or 15, wherein the receiving unit is further configured to receive second higher layer signaling, the second higher layer signaling being configured to configure a code division multiplexing, CDM, group set for the terminal device, and the second higher layer signaling being configured to determine a set of time units for the terminal device.
18. The communications apparatus of claim 17, wherein the processing unit is further configured to determine a CDM group to which each of the one or more first antenna ports belongs based on the one or more first antenna ports; and

    the processing unit is specifically configured to:

    when a CDM group corresponding to the first antenna port belongs to the CDM group set and the first time unit belongs to the time unit set, precoding uplink data carried on the first antenna port by using sub-band precoding in the first time unit;

    and when the CDM group corresponding to the first antenna port does not belong to the CDM group set and the first time unit belongs to the time unit set, precoding uplink data carried on the antenna port by using wideband precoding in the first time unit.
19. The communication apparatus according to any of claims 15-18, wherein the receiving unit is further configured to obtain the wideband precoding used for uplink transmission according to the first higher layer signaling or the first DCI.
20. The communication apparatus according to any one of claims 14-19, wherein the first DCI message further includes a phase rotation indication value;

    The uplink data comprises demodulation reference signals DMRS,

    the processing unit is further configured to rotate phases of different resource element RE groups in each precoding resource block PRG corresponding to the DMRS according to the phase rotation instruction value.
21. A transmitting communication apparatus for a physical uplink shared channel, comprising:

    a sending unit, configured to send first downlink control information DCI to a terminal device, where the first DCI is used to schedule the terminal device to perform uplink transmission on a first time unit and instruct one or more first antenna ports used for uplink transmission of the terminal device;

    a receiving unit, configured to receive, in the first time unit, a physical uplink shared channel PUSCH transmitted by the terminal device, where,

    the PUSCH is generated by the terminal device precoding uplink data transmitted in each of the one or more first antenna ports using subband precoding or wideband precoding according to the first DCI.
22. The communications apparatus of claim 21, wherein the transmitting unit is further configured to transmit first higher layer signaling to the terminal device, the first higher layer signaling configured to configure subband precoding for the terminal device.
23. The communication apparatus according to claim 21 or 22, wherein the first DCI further comprises subband precoding indication information.
24. The communication apparatus according to claim 21 or 22, wherein the sending unit is further configured to send a second higher layer signaling to the terminal device, the second higher layer signaling being configured to configure a code division multiplexing, CDM, group set for the terminal device, and the second higher layer signaling being configured to determine a set of time units for the terminal device.
25. The communications apparatus of any one of claims 22-24, wherein the first higher layer signaling or the first DCI includes the wideband precoding used for uplink transmission.
26. The communication apparatus according to any one of claims 21-25, wherein the first DCI message further includes a phase rotation indication value.
27. A communication device comprising at least one processor coupled with at least one memory, the at least one processor configured to execute a computer program or instructions stored in the at least one memory to cause the communication device to perform the method of any one of claims 1 to 7 or to cause the communication device to perform the method of any one of claims 8 to 13.
28. A computer readable storage medium having stored therein computer instructions which, when run on a computer, perform the method of any one of claims 1 to 7 or the method of any one of claims 8 to 13.
29. A computer program product, characterized in that the computer program product comprises a computer program code for performing the method according to any of claims 1 to 7 or for performing the method according to any of claims 8 to 13 when the computer program code is run on a computer.
30. A chip system, comprising: logic circuitry to couple with an input/output interface through which data is transferred to perform the method of any one of claims 1 to 7 or to perform the method of any one of claims 8 to 13.

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