CN116032441A

CN116032441A - Information transmission method and device

Info

Publication number: CN116032441A
Application number: CN202111243249.1A
Authority: CN
Inventors: 宣一荻; 谢信乾; 郭志恒
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2021-10-25
Filing date: 2021-10-25
Publication date: 2023-04-28
Also published as: WO2023071941A1

Abstract

The application discloses an information transmission method and device, wherein the method comprises the following steps: the network device generates first indication information, which is used for indicating demodulation reference signal DMRS configuration, where the DMRS configuration may be a first DMRS configuration or a second DMRS configuration, and the first DMRS configuration is used for indicating: the first time slot and the second time slot are used for bearing the first DMRS, and the third time slot does not bear the DMRS; the second DMRS is configured to indicate: the third time slot is not used for bearing the DMRS, and the fourth time slot is used for bearing the second DMRS; the terminal equipment receives the first indication information, and receives the DMRS in a time slot for bearing the DMRS in the first time period. By adopting the method of the embodiment of the application, the network equipment can flexibly schedule the downlink signals in the first time period while reducing the cost of the DMRS, so that the DMRS of the multi-terminal equipment is aligned, and the channel estimation performance is ensured.

Description

Information transmission method and device

Technical Field

The present disclosure relates to the field of communications technologies, and in particular, to an information transmission method and apparatus.

Background

In a wireless communication system, in order to correctly acquire transmission data, a terminal device needs to rely on demodulation reference signals (demodulation reference signal, DMRS) to obtain channel coefficients of a transmission channel, so as to perform channel estimation to correctly demodulate the transmitted data.

In the existing New Radio (NR) standard, it is specified that a 1-symbol preamble demodulation reference signal (demodulation reference signal, DMRS) or a 2-symbol preamble DMRS may be configured in the time domain, where the 2-symbol preamble DMRS is used to support more DMRS ports to transmit more spatial layers.

In the fixed wireless access (fixed wireless access, FWA) scenario, since the service is usually mainly a downlink streaming media service, the downlink transmission requirement is large, the pairing layer number is high, and a DMRS with 2 symbols is usually configured. However, 2 symbols of DMRS have a large overhead, and it is necessary to reduce the DMRS overhead in the FWA scenario.

Disclosure of Invention

The embodiment of the application provides an information transmission method and device, which can reduce the cost of a DMRS and flexibly schedule downlink signals.

In a first aspect, there is provided an information transmission method, including: the method comprises the steps that a network device generates first indication information, the first indication information indicates demodulation reference signal (DMRS) configuration, the DMRS configuration is used for determining a time slot for bearing the DMRS in a first time period by a terminal device, and the first time period comprises at least two time slots; the network equipment sends first indication information; the DMRS configuration is one of a set of DMRS configurations, wherein the set of DMRS configurations includes a first DMRS configuration and a second DMRS configuration, and the first DMRS configuration is used for indicating: the first time slot and the second time slot are used for bearing the first DMRS, and the third time slot does not bear the DMRS; the first time period comprises a first time slot, a second time slot and at least one third time slot, wherein the first time slot is used for bearing part of signals of the first DMRS, and the second time slot is used for bearing the other part of signals of the first DMRS; the second DMRS is configured to indicate: the third time slot is not used for carrying the DMRS, and the fourth time slot is used for carrying the second DMRS, wherein the first time period includes the fourth time slot and at least one third time slot.

In the embodiment of the application, the first indication information is generated and sent by the network equipment to indicate the DMRS configuration, and the terminal equipment determines the time slot for bearing the DMRS in the first time period according to the first indication information and the first time period, so as to determine the time-frequency position of the DMRS later and acquire the DMRS for channel estimation. In the process, the first DMRS configuration mode can achieve the effect of supporting multi-layer space transmission while reducing the DMRS overhead, and the first DMRS configuration and the second DMRS configuration flexibly align the configured DMRS when the network device schedules a plurality of terminal devices through the time slots without bearing the DMRS, so that the scheduling flexibility of the network device is ensured.

In an alternative example, symbol a on the nth subcarrier in the first OFDM symbol and symbol B on the nth subcarrier in the second OFDM symbol satisfy: the values of a/a=b/B satisfy one of the following: a=1, b=1; a=1, b= -1; or a= -1, b = 1, wherein the first OFDM symbol is an OFDM symbol in the first slot for carrying a part of the signal of the first DMRS, and the second OFDM symbol is an OFDM symbol in the second slot for carrying another part of the signal of the first DMRS.

In an alternative example, the values of a and b are determined according to the DMRS port to which the first DMRS corresponds, the first time domain index of the first slot, and the second time domain index of the second slot.

In an optional example, the DMRS configuration set further includes a third DMRS configuration, where the third DMRS configuration is configured to indicate: the first time slot and the second time slot are used for bearing the first DMRS, the fourth time slot is used for bearing the second DMRS, and the third time slot does not bear the DMRS, wherein the first time slot comprises the first time slot, the second time slot, the fourth time slot and at least one third time slot.

In an alternative example, the method further comprises: the network device indicates a first time period.

In an alternative example, the network device indicates the first time period by sending second indication information, where the second indication information is time period configuration information or uplink and downlink time slot configuration information.

In an alternative example, the first indication information indicates the DMRS configuration by: an index indicating the DMRS configuration in a DMRS configuration set, the DMRS configuration set being determined from a plurality of DMRS configuration sets according to a time length of the first time period; indicating a first time slot and a second time slot in the DMRS configuration, and/or indicating a fourth time slot in the DMRS configuration, wherein the first time slot and the second time slot are indicated by at least one first indication unit, and the fourth time slot is indicated by at least one second indication unit; and indicating the time slots used for bearing the DMRS in the DMRS configuration, which are increased and/or decreased compared with the preset DMRS configuration.

In the embodiment of the application, the DMRS configuration is determined by indicating the index in the DMRS configuration set, and the indication of the DMRS configuration can be completed through very little resource overhead, so that the resource overhead for indicating the DMRS configuration is reduced; the DMRS configuration is determined by indicating the time slot carrying the DMRS in the DMRS configuration, so that the terminal equipment can accurately correspond to the corresponding DMRS configuration in the DMRS configuration set without worrying about the occurrence of the situation of corresponding errors. The accuracy of indicating the DMRS configuration is ensured. By indicating the time slot for carrying the DMRS, which is increased and/or decreased compared with the preset DMRS configuration, in the DMRS configuration, if the preset DMRS configuration is used, the content is not transmitted in the first indication information, so that the overhead of transmitting the first indication information is reduced, and meanwhile, the efficiency of determining the DMRS configuration by the terminal equipment is improved.

In an alternative example, the time slots within the first time period carry a phase continuous signal.

In a second aspect, there is provided an information receiving method, the method comprising: the method comprises the steps that a terminal device receives first indication information, the first indication information indicates demodulation reference signal (DMRS) configuration, the DMRS configuration is used for determining a time slot for bearing the DMRS in a first time period, and the first time period comprises at least two time slots; the terminal equipment receives the DMRS in a time slot for bearing the DMRS in the first time period according to the first time period and the DMRS configuration; the DMRS configuration is one of a set of DMRS configurations, wherein the set of DMRS configurations includes a first DMRS configuration and a second DMRS configuration, and the first DMRS configuration is used for indicating: the first time slot and the second time slot are used for bearing the first DMRS, and the third time slot does not bear the DMRS; the first time period comprises a first time slot, a second time slot and at least one third time slot, wherein the first time slot is used for bearing part of signals of the first DMRS, and the second time slot is used for bearing the other part of signals of the first DMRS; the second DMRS is configured to indicate: the third time slot is not used for carrying the DMRS, and the fourth time slot is used for carrying the second DMRS, wherein the first time period includes the fourth time slot and at least one third time slot.

In an alternative example, symbol a on the nth subcarrier in the first OFDM symbol and symbol B on the nth subcarrier in the second OFDM symbol satisfy:

the values of a/a=b/B satisfy one of the following: a=1, b=1; a=1, b= -1; or a= -1, b = 1, wherein the first OFDM symbol is an OFDM symbol in the first slot for carrying a part of the signal of the first DMRS, and the second OFDM symbol is an OFDM symbol in the second slot for carrying another part of the signal of the first DMRS.

In an alternative example, the method further comprises: and the terminal equipment determines a time slot for bearing the DMRS in the N time slots according to the DMRS configuration, the time slot position of the first time slot and the N time slots in the first time slot, wherein the N time slots are continuous time slots for the terminal equipment to receive the first downlink signal.

In an alternative example, the method further comprises: receiving second indication information, wherein the second indication information is time period configuration information or uplink and downlink time slot configuration information; the first time period is determined based on the second indication information.

In a third aspect, there is provided a communication apparatus comprising: the processing unit is used for generating first indication information, the first indication information indicates demodulation reference signal (DMRS) configuration, the DMRS configuration is used for determining a time slot for bearing the DMRS in a first time period by the terminal equipment, and the first time period comprises at least two time slots; a transmitting unit, configured to transmit first indication information; the DMRS configuration is one of a set of DMRS configurations, wherein the set of DMRS configurations includes a first DMRS configuration and a second DMRS configuration, and the first DMRS configuration is used for indicating: the first time slot and the second time slot are used for bearing the first DMRS, and the third time slot does not bear the DMRS; the first time period comprises a first time slot, a second time slot and at least one third time slot, wherein the first time slot is used for bearing part of signals of the first DMRS, and the second time slot is used for bearing the other part of signals of the first DMRS; the second DMRS is configured to indicate: the third time slot is not used for carrying the DMRS, and the fourth time slot is used for carrying the second DMRS, wherein the first time period includes the fourth time slot and at least one third time slot.

In an alternative example, the sending unit is further configured to indicate the first time period.

In an alternative example, the transmitting unit indicates the first period by transmitting second indication information, which is period configuration information or uplink and downlink slot configuration information.

In a fourth aspect, there is provided a communication apparatus comprising: the terminal equipment comprises a receiving unit, a demodulation reference signal (DMRS) unit and a receiving unit, wherein the receiving unit is used for receiving first indication information, the first indication information indicates the configuration of the DMRS, and the configuration of the DMRS is used for determining a time slot for bearing the DMRS in a first time period by the terminal equipment, and the first time period comprises at least two time slots; a processing unit, configured to receive, by the receiving unit, the DMRS in a time slot for carrying the DMRS in the first period according to the first period and the DMRS configuration; the DMRS configuration is one of a set of DMRS configurations, wherein the set of DMRS configurations includes a first DMRS configuration and a second DMRS configuration, and the first DMRS configuration is used for indicating: the first time slot and the second time slot are used for bearing the first DMRS, and the third time slot does not bear the DMRS; the first time period comprises a first time slot, a second time slot and at least one third time slot, wherein the first time slot is used for bearing part of signals of the first DMRS, and the second time slot is used for bearing the other part of signals of the first DMRS; the second DMRS is configured to indicate: the third time slot is not used for carrying the DMRS, and the fourth time slot is used for carrying the second DMRS, wherein the first time period includes the fourth time slot and at least one third time slot.

In an alternative example, the processing unit is further configured to: according to the DMRS configuration, determining a time slot for bearing the DMRS in the N time slots according to the time domain positions of the first time slot and the N time slots in the first time slot, wherein the N time slots are continuous time slots for receiving the first downlink signal by the terminal equipment.

In an alternative example, the receiving unit is further configured to: receiving second indication information, wherein the second indication information is time period configuration information or uplink and downlink time slot configuration information; the processing unit is further configured to: the first time period is determined based on the second indication information.

In a fifth aspect, embodiments of the present application provide a communication apparatus comprising a communication interface for communicating with other devices and at least one processor. By way of example, the communication interface may be a transceiver, circuit, bus, module, or other type of communication interface. At least one processor is configured to invoke a set of programs, instructions or data to perform the method described in the first or second aspect above. The apparatus may also include a memory for storing programs, instructions or data called by the processor. The memory is coupled to at least one processor which, when executing instructions or data stored in the memory, can implement the method described in the first or second aspect above.

In a sixth aspect, embodiments of the present application further provide a computer readable storage medium having stored therein instructions that, when executed on a computer, cause the computer to perform a method as in the first aspect or any one of the possible implementations of the first aspect, or cause the computer to perform a method as in the second aspect or any one of the possible implementations of the second aspect.

In a seventh aspect, an embodiment of the present application provides a chip system, where the chip system includes a processor, and may further include a memory, where the method is used to implement the first aspect or any one of the possible implementation manners of the first aspect, or the method is used to implement the second aspect or any one of the possible implementation manners of the second aspect, and the chip system may include a chip, or may include a chip and other discrete devices.

In one possible example, the system-on-chip further includes a transceiver.

In an eighth aspect, embodiments of the present application also provide a computer program product comprising instructions which, when run on a computer, cause the computer to perform the method as in the first aspect or any one of the possible implementations of the first aspect, or cause the computer to perform the method as in the second aspect or any one of the possible implementations of the second aspect.

In a ninth aspect, in an embodiment of the present application, there is further provided a communication system, which may include the communication apparatus provided in the first aspect and the second aspect.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below.

Fig. 1 is a schematic structural diagram of a communication system according to an embodiment of the present application;

fig. 2 is a schematic diagram of a single symbol DMRS pattern according to an embodiment of the present application;

fig. 3 is a schematic diagram of a dual-symbol DMRS pattern according to an embodiment of the present application;

fig. 4 is a schematic diagram of configuring DMRS by cross-slot OCC according to an embodiment of the present application;

fig. 5 is a schematic view of a scenario in which a base station performs multi-terminal scheduling according to an embodiment of the present application;

fig. 6A is a flowchart of an information transmission method according to an embodiment of the present application;

fig. 6B is a schematic diagram of L slots in a first period of time according to an embodiment of the present application;

fig. 6C is a schematic diagram of DMRS configuration of N consecutive slots in a first period of time according to an embodiment of the present application;

fig. 6D is a schematic diagram of a manner of indicating DMRS configuration according to an embodiment of the present application;

fig. 7 is a block diagram of a communication device according to an embodiment of the present application;

Fig. 8 is a block diagram of a communication device according to an embodiment of the present application;

fig. 9 is a schematic structural diagram of an electronic device according to an embodiment of the present application.

Detailed Description

The terms "first," "second," "third," and "fourth" and the like in the description and in the claims of this application and in the drawings, are used for distinguishing between different objects and not for describing a particular sequential order. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, system, article, or apparatus that comprises a list of steps or modules is not limited to only those steps or modules but may include other steps or modules not expressly listed or inherent to such process, method, article, or apparatus.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the present application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.

"plurality" means two or more. "and/or", describes an association relationship of an association object, and indicates that there may be three relationships, for example, a and/or B, and may indicate: a exists alone, A and B exist together, and B exists alone. The character "/" generally indicates that the context-dependent object is an "or" relationship.

First, an application scenario of the embodiment of the present application will be described.

The embodiment of the application can be applied to a long term evolution (long term evolution, LTE) system and an Internet of things (internet ofthings, ioT) system; other wireless communication systems, such as the global system for mobile communications (global systemfor mobile communication, GSM), the mobile communication system (universal mobile telecommunications system, UMTS), the code division multiple access (code division multiple access, CDMA) system, and the new radio, NR, system, etc., may also be suitable.

The embodiments of the present application relate to a terminal device, which may also be referred to as a terminal, a User Equipment (UE), a mobile station, a mobile terminal, or the like. The terminal can be widely applied to various scenes. For example, device-to-device (D2D), vehicle-to-device (vehicle to everything, V2X) communication, machine-type communication (MTC), internet of things (internet of things, IOT), virtual reality, augmented reality, industrial control, autopilot, telemedicine, smart grid, smart furniture, smart office, smart wear, smart transportation, smart city, and the like. The terminal can be a mobile phone, a tablet personal computer, a computer with a wireless receiving and transmitting function, a wearable device, a vehicle, an unmanned aerial vehicle, a helicopter, an airplane, a ship, a robot, a mechanical arm, intelligent household equipment and the like. The embodiment of the application does not limit the specific technology and the specific equipment form adopted by the terminal. The embodiment of the application relates to a network device, which may also be referred to as a radio access network device, and the network device may be a base station (base station), an evolved NodeB (eNodeB), a transmitting and receiving point (transmission receptionpoint, TRP), a next generation NodeB (gNB) in a fifth generation (5th generation,5G) mobile communication system, a next generation base station in a sixth generation (6th generation,6G) mobile communication system, a base station in a future mobile communication system, or an access node in a WiFi system; the present invention may also be a module or unit that performs a function of a base station part, for example, a Central Unit (CU) or a Distributed Unit (DU). The CU can complete the functions of a radio resource control protocol and a packet data convergence layer protocol (packet data convergence protocol, PDCP) of the base station and can also complete the functions of a service data adaptation protocol (service data adaptation protocol, SDAP); the DU performs the functions of the radio link control layer and the medium access control (medium access control, MAC) layer of the base station, and may also perform the functions of a part of the physical layer or the entire physical layer, and for a detailed description of the above protocol layers, reference may be made to the relevant technical specifications of the third generation partnership project (3rd generation partnership project,3GPP). The network device may be a macro base station, a micro base station, an indoor station, a relay node, a donor node, or the like. The embodiment of the application does not limit the specific technology and the specific device form adopted by the network device.

The system structure of the terminal device and the network device can be referred to fig. 1. Fig. 1 is a schematic structural diagram of a communication system provided in an embodiment of the present application, where the system includes a network device and a terminal device, and a main application scenario in the embodiment of the present application is a scenario in which the network device performs downlink communication with the terminal device, as shown in fig. 1, where the network device sends a signal to the terminal device.

In addition, terms of art and contexts that may be involved in embodiments of the present application are described.

FWA network: wireless local area network or limited local area network access is provided to end users through indoor or outdoor customer premises equipment (customer premisesequipment, CPE) by means of LTE and 5G NR technology. CPE can provide end users with a variety of services such as internet, landline, television, smart home, etc. In FWA scenarios, CPE devices are fixed location installed, whose channel state can theoretically remain constant without moving reflectors around. However, considering the influence of the surrounding moving reflector, even for a fixed-position terminal, its channel state cannot be assumed to be completely stationary. Based on the results of the outfield channel test, it has been preliminarily concluded that: for typical non line of sight (NLOS) and line of sight (LOS) channel environments, the channel variation for a fixed location terminal may be assumed at a 1km (kilometers)/h (hours) movement speed. Thus, for a fixed location terminal, its channel variation amplitude is lower in consecutive time slots than that of the mobile terminal, that is, for a fixed location terminal, its channel varies slowly in the time domain. Under the condition of slow channel variation, the accuracy requirement of channel estimation can be met without configuring high-density DMRS in the time domain. Thus, in the FWA network, the overhead for transmitting the DMRS can be reduced, which can be said to reduce the number of OFDM symbols used for transmitting the DMRS.

Orthogonal frequency division multiplexing (orthogonal frequency division multiplexing, OFDM) symbols: the smallest time unit in the time domain in an OFDM system.

Spatial layer: in the existing wireless communication system, a base station side is provided with multiple antennas to implement spatial multiplexing transmission by using a multiple-input multiple-output (MIMO) technology, that is, multiple uncorrelated data streams are transmitted on the same time-frequency resource, each uncorrelated data stream is transmitted on a separate spatial layer, and each spatial layer is mapped to a different antenna port for transmission.

DMRS: the DMRS is a signal known to the receiving device, and the receiving device can determine the fading characteristic of the wireless channel, that is, the channel coefficient of the wireless channel, according to the received signal and the known DMRS signal, so as to recover the received signal. In the 5G NR system, considering that channel coefficients from different antenna ports to a receiving device are different, in order for the receiving device to be able to obtain information transmitted on multiple spatial layers, it is necessary to estimate channel coefficients between each antenna port and the receiving device, so that different DMRS needs to be configured for each antenna port, where DMRS corresponding to different antenna ports may be multiplexed in a time division, frequency division, code division, and other manners. Currently, a maximum of 12 DMRS ports can be supported by a 5G NR system. In an NR system, DMRS may include a preamble DMRS and an additional DMRS. The first OFDM symbol of the pre-DMRS typically starts with the 3 rd or fourth OFDM symbol of the slot; the additional DMRS is designed for the high-speed scenario, and is generally configured after the OFDM symbol corresponding to the pre-DMRS, and the additional DMRS can meet the accuracy requirement of channel estimation of the rapidly-changing channel state. The embodiment of the invention mainly aims at the prepositive DMRS.

Channel estimation: in the 5G NR system and the LTE system, the multiple access scheme generally employs an orthogonal frequency division multiple access (orthogonal frequency division multiplexing access, OFDMA) scheme. The OFDMA method is mainly characterized by dividing transmission resources into mutually orthogonal time-frequency Resource Elements (REs), where signals sent by a transmitting device are carried on REs and transmitted to a receiving device, and because different REs are mutually orthogonal, the receiving device can receive signals sent on each RE individually. In view of the fading characteristics of the radio channel, the signal carried on the RE will generate distortion after being transmitted through the channel, and this channel distortion is generally referred to as a channel coefficient. In order to recover a signal at a receiving device, a channel coefficient needs to be estimated, in the prior art, a scheme based on a reference signal is generally adopted, that is, a transmitting device transmits a known signal on a specific RE, the receiving device estimates the channel coefficient according to the received signal and the known signal, and interpolates the channel coefficients on other REs according to the channel coefficient obtained by the estimation, so as to facilitate the receiving demodulation of a data signal by the channel coefficient obtained by the estimation. For example, the receiving end may use the DMRS for channel estimation.

Orthogonal cover codes (orthogonal cover code, OCC): in a wireless communication system adopting the MIMO technology, the OCC code may be used to perform a weighting process on the sequence of reference signals transmitted by the transmitting device, so that reference signals (e.g., DMRS signals) transmitted on the same time-frequency resource may be subjected to code division multiplexing, thereby suppressing interference between reference signals transmitted on the same time-frequency resource. OCC codes may also be referred to as OCC sequences.

DMRS overhead: in the 5G NR system, DMRS may support 4 or 6 layers of spatial layers when configuring a single-symbol DMRS (one DMRS is carried by one OFDM symbol in a slot) and may support 8 or 12 layers of spatial layers when configuring a double-symbol DMRS (one DMRS is carried by two OFDM symbols in a slot) by means of time division multiplexing, frequency division multiplexing, and code division multiplexing.

The DMRS configuration in the time slot may be indicated by radio resource control (radio resource control, RRC) signaling, for example, the maximum preamble symbol number of the DMRS may be configured by a parameter Maxlength, which may be 1 or 2, and when the Maxlength is configured to be 1, it indicates that the preamble DMRS occupies at most 1 symbol, i.e. a single symbol DMRS is configured in the time slot; when maxLenghth is 2, it means that the preamble DMRS occupies 2 symbols at most, i.e., a dual-symbol DMRS is configured in the slot.

As shown in fig. 2, a single symbol DMRS pattern provided in this embodiment of the present application is shown, where a horizontal direction represents a time domain, a vertical direction represents a frequency domain, each small square represents one RE, where DMRS port 0 and port 1 perform code division multiplexing through OCC, so REs corresponding to the two ports are also referred to as a code division multiplexing (code division multiplexing, CDM) group, and as DMRS corresponding to DMRS port 0 and port 1 in fig. 2 are carried on REs 0, RE 1, RE 6 and RE 7, and REs 0, RE 1, RE 6 and RE 7 form one CDM group, that is, CDM group 0. Within one CDM group, code division multiplexing of DMRS signals within one CDM group may be implemented by OCC codes to support two-layer spatial layer transmission, i.e., 2 DMRS ports. Similarly, REs corresponding to DMRS port 2 and port 3 constitute CDM group 1, and REs corresponding to DMRS port 4 and port 5 belong to CDM group 2. A total of 3 CDM groups may support 6-layer spatial transmission. DMRSs belonging to different CDM groups are multiplexed by frequency division.

As shown in fig. 3, a schematic diagram of a dual-symbol DMRS pattern provided in an embodiment of the present application also includes 3 CDM groups, each CDM group enabling 4 DMRS signals to be code division multiplexed to support four-layer spatial layer transmission. For example, DMRS corresponding to DMRS port 0, port 1, port 6 and port 7 are carried on REs 0, RE 1, RE 6, RE 7, RE 12, RE 13, RE 18 and RE 19, which constitute CDM group 0, i.e., CDM group 0 supports four DMRS ports, i.e., four spatial layer transmission. Three CDM groups support 12 layers of spatial transmission in total by means of frequency division multiplexing.

As can be seen from fig. 2 and fig. 3, in the case of configuring a single symbol DMRS, from the time domain, there are 1 OFDM symbol carrying DMRS in one slot, and the overhead of the DMRS is about 1/14; in the case of configuring a dual-symbol DMRS, there are 2 OFDM symbols in one slot to carry the DMRS, and the overhead of the DMRS is 1/7 from the time domain. The overhead of the double-symbol DMRS is large, and the utilization efficiency of the frequency spectrum is reduced.

One practical method for reducing DMRS overhead in FWA scenarios: by means of cross-slot OCC, 1 OFDM symbol is configured in two continuous time slots for bearing the DMRS, and cross-slot OCC codes (such as OCC codes adopted under the configuration of double-symbol DMRS in a 5G NR system) are used to enable a plurality of DMRS corresponding to the two continuous time slots to realize code division multiplexing. In this way, simultaneous transmission of at most 12 spatial layers can be realized through cross-slot OCC of two slots only in the case of one slot configuration single symbol DMRS. Referring to fig. 4, a schematic diagram of configuring DMRS by cross-slot OCC is provided in this embodiment, a single-symbol DMRS is configured per time slot in time slot 1 and time slot 2, and the DRMS of two time slots performs code division multiplexing by cross-slot OCC codes (for example, the OCC codes adopted under the configuration of dual-symbol DMRS in a 5G NR system), so 8 REs in two time slots can support 4 DMRS ports, 24 REs in two time slots can support 12 DMRS ports, which is equivalent to supporting 12 DMRS ports by 1 DMRS overhead of OFDM symbol per time slot, compared with the manner of configuring 12 DMRS ports by configuring dual-symbol DMRS per time slot in the prior art, the overhead for transmitting DMRS is reduced by half.

Through the above process, the overhead of transmitting the DMRS can be reduced while satisfying the multi-layer transmission in the FWA scene. But this DMRS configuration introduces new problems. Referring to fig. 5, a schematic view of a scenario of multi-terminal scheduling performed by a base station according to an embodiment of the present application is provided, where in a case where multiple users perform space division multiplexing pairing, DMRS of OCC performed by a UE performing space division multiplexing needs to be completely aligned to eliminate mutual interference between DMRS of multiple users, otherwise, DMRS channel estimation performance may be degraded. As shown in fig. 5, taking the configuration of the uplink and downlink transmission period as DDSUU (where D represents a downlink (downlink) slot, U represents an uplink (uplink) slot, and S represents a special (specific) slot), the base station may schedule DDS slot transmission therein, numbered as slots 1 to 3, and when UE1 and UE2 schedule slot 1 and slot 2 and UE3 schedule slot 2 and slot 3, DMRS of cross-slot OCC between users is not aligned, so that interference of DMRS between users cannot be eliminated, and channel estimation performance is degraded.

Another possible way is to make DMRS of cross-slot OCC completely aligned between UEs by means of base station scheduling, but such operation obviously affects scheduling flexibility of the base station, such as in the case where only slots 1 to 3 are available, since cross-slot OCC needs to be made in two consecutive slots, UE1, UE2 and UE3 can only schedule 2 slots, and these UEs can only use

slots

1 and 2, or

use slots

2 and 3, which makes resources not fully utilized.

Based on the above description, please refer to fig. 6A, which is a flowchart of an information transmission method according to an embodiment of the present application, as shown in fig. 6A, the method includes the following steps:

201. the method comprises the steps that a network device generates first indication information, the first indication information indicates demodulation reference signal (DMRS) configuration, the DMRS configuration is used for determining a time slot for bearing the DMRS in a first time period by a terminal device, and the first time period comprises at least two time slots;

202. the network equipment sends first indication information;

203. the terminal equipment receives the first indication information, and receives the DMRS in a time slot for bearing the DMRS in the first time period.

The DMRS configuration may be one of a set of DMRS configurations, where the set of DMRS configurations includes a first DMRS configuration and a second DMRS configuration, and the first DMRS configuration is used to indicate: the first time slot and the second time slot are used for bearing a first DMRS, the third time slot does not bear the DMRS, wherein the first time period comprises the first time slot, the second time slot and at least one third time slot, the first time slot is used for bearing part of signals of the first DMRS, and the second time slot is used for bearing the other part of signals of the first DMRS; the second DMRS is configured to indicate: the third time slot is not used for carrying the DMRS, and the fourth time slot is used for carrying the second DMRS, wherein the first time period includes the fourth time slot and at least one third time slot.

In one embodiment, the first DMRS maps to two OFDM symbols in the time domain, where a portion of the first DMRS mapped to a resource corresponding to one OFDM symbol may be transmitted in the first slot, and a portion of the first DMRS mapped to a resource corresponding to another OFDM symbol may be transmitted in the second slot.

Optionally, the second DMRS is mapped to two OFDM symbols in the time domain, and the fourth time slot includes the two OFDM symbols.

In the embodiment of the application, the first indication information is generated through the network equipment to indicate the DMRS configuration, and then the terminal equipment acquires the DMRS on the corresponding resource unit according to the DMRS configuration indicated by the network equipment so as to complete channel estimation. The DMRS configuration indicated by the network device is one of multiple DMRS configurations in a DMRS configuration set, where the DMRS configuration set is all possible DMRS configurations corresponding to the first period.

The length of the first time period may be characterized by the number of time slots included in the first time period. For example, the length of the first period is L, which indicates that the first period includes L slots. Alternatively, one or more time slots within the first time period may be used to carry signals transmitted by the network device to the terminal device, and in one possible scenario, all time slots within the first time period may be used to carry signals transmitted by the network device to the terminal device. Optionally, in one or more time slots of the L time slots for the network device to transmit signals to the terminal device, the phase of the signals transmitted by the network device to the terminal device is continuous. Optionally, the condition that the phase of the signal received by the terminal device in the one or more time slots is continuous is that the one or more time slots do not include a time slot for uplink transmission, which can be said to be that the first time period does not include a time slot for uplink transmission. For example, referring to fig. 6B, fig. 6B is a schematic diagram of L time slots in a first time period provided in the embodiment of the present application, and as shown in fig. 6B, when l=6, it is assumed that only 3 downlink transmission time slots are included in the first time period 1, and the 3 downlink transmission time slots are signals sent by the network device in one downlink scheduling, and are signals with continuous phases. Assuming that the first period 2 includes 4 discontinuous downlink transmission time slots, and the middle includes 2 time slots in which no signal transmission is performed, since the middle of the 4 discontinuous downlink transmission time slots is not interrupted by an uplink signal, signals in the 4 downlink transmission time slots are also signals with continuous phases. And the first time period 3 is interrupted by the uplink signal when the downlink transmission scheduling is performed twice before and after, so that the signals in the first 2 downlink transmission time slots and the signals in the last 2 downlink transmission time slots in the 6 time slots are not signals with continuous phases, and the 6 time slots cannot be divided into a first time period. The frequency domain resources for downlink transmission corresponding to the downlink transmission time slots with continuous phases are the same.

In one possible implementation for a set of DMRS configurations, the set of DMRS configurations includes a plurality of DMRS configurations, which may include a first DMRS configuration and a second DMRS configuration.

For example, the plurality of DMRS configurations may include the DMRS configurations in table 1 below, see table 1 for details:

TABLE 1

Index	First time slot and second time slot	Third time slot	Fourth time slot
				0	/	Time slot 1 and time slot 3	Time slot 2
1	Time slot 2 and time slot 3	Time slot 1	/
				2	Time slots1 and time slot 2	Time slot 3	/
3	Reservation of	Reservation of	Reservation of

As shown in table 1, the plurality of DMRS configurations may include 3 DMRS configurations, and the 3 DMRS configurations correspond to a first period of length 3 (including 3 slots). Wherein, 3 time slots included in the first time period are numbered from time slot 1 to time slot 3. For example, when the index value is 0, the corresponding DMRS is configured to: time slot 1 and time slot 3 are third time slots, no DMRS is carried on time slot 1 and time slot 3, time slot 2 is fourth time slots, namely, a second DMRS is carried on time slot 2, and the DMRS is configured as the second DMRS. When the index value is 1, the corresponding DMRS is configured to: time slot 2 and time slot 3 are a first time slot and a second time slot respectively, that is, time slot 2 carries a part of signals of a first DMRS, time slot 3 carries another part of signals of a second DMRS, time slot 1 is a third time slot, and the DMRS is configured as the first DMRS. In this embodiment of the present application, the DMRS configuration is configured as two-symbol DMRS, so that the second DMRS on the time slot 2 corresponding to the index value 0 occupies 2 OFDM symbols, and the first DMRS on the time slot 2 and the time slot 3 corresponding to the index value 1 respectively occupy 1 OFDM symbol.

In addition, 3 DMRS configurations may be indicated by 2 bits (bits), and 2 bits may indicate 4 configurations in total, so the first 3 index values may correspond to one DMRS configuration, and the 4 th index value is a reserved item.

The plurality of DMRS configurations further includes, if possible, a third DMRS configuration for indicating: the first time slot and the second time slot are used for bearing the first DMRS, the fourth time slot is used for bearing the second DMRS, and the third time slot does not bear the DMRS, wherein the first time slot comprises the first time slot, the second time slot, the fourth time slot and at least one third time slot.

That is, among the plurality of DMRS configurations, a DMRS configuration for indicating that a first time slot for carrying a first DMRS and a second time slot for carrying a second DMRS are simultaneously included in a first time period, a fourth time slot for carrying a second DMRS, and a third time slot not for carrying a DMRS may be included. See table 2 or table 3 for specific details:

TABLE 2

Index	First time slot and second time slot	Third time slot	Fourth time slot
				0	/	Time slot 1 and time slot 4	Time slot 2 and time slot 3
1	Time slot 1 and time slot 2	Time slot 3	Time slot 4
				2	Time slot 3 and time slot 4	Time slot 2	Time slot 1
3	Reservation of	Reservation of	Reservation of

As shown in table 2, the multiple DMRS configurations shown in table 2 may include 3 DMRS configurations, and the length of the first period corresponding to the 3 DMRS configurations is 4 (including 4 slots). Wherein, the 4 time slots included in the first time period are numbered from time slot 1 to time slot 4. When the index value is 1, the corresponding DMRS is configured to: time slot 1 and time slot 2 are the first time slot and the second time slot, time slot 3 is the third time slot, and time slot 4 is the fourth time slot, namely the third DMRS configuration.

TABLE 3 Table 3

Index	First time slot and second time slot	Third time slot	Fourth time slot
				0	/	Time slot 1 and time slot 4	Time slot 2 and time slot 3
1	Time slot 1 and time slot 2	Time slot 4	Time slot 3
				2	Time slot 3 and time slot 4	Time slot 1	Time slot 2
4	Reservation of	Reservation of	Reservation of

As shown in table 3, table 3 shows 3 DMRS configurations that the multiple DMRS configurations may include, and the length of the first period corresponding to the 3 DMRS configurations is 4. Likewise, the 4 slots within the first time period are numbered slot 1 through slot 4. When the index value is 1, the corresponding DMRS is configured to: time slot 1 and time slot 2 are the first time slot and the second time slot, time slot 4 is the third time slot, and time slot 3 is the fourth time slot, namely the third DMRS configuration.

In this possible implementation manner, in step 203, the terminal device receives the first indication information, and receives the DMRS in a time slot for carrying the DMRS in the first period, which may be specifically divided into the following two steps: 2031. the terminal equipment receives the first indication information and determines the DMRS configuration corresponding to the first indication information; 2032. and the terminal equipment receives the DMRS in the time slot for bearing the DMRS in the first time period according to the DMRS configuration.

That is, the first indication information indicates a DMRS configuration, possibly one of a first DMRS configuration, a second DMPRS configuration, a third DMRS configuration, or other possible DMRS configuration. And the terminal equipment can specifically determine the content of the DMRS configuration according to the received first indication information.

Or, if possible, in step 203, the terminal device receives the first indication information, and receives the DMRS in a time slot for carrying the DMRS in the first period, which may be specifically divided into the following two steps: 2033. the terminal equipment receives the first indication information, determines the DMRS configuration corresponding to the first indication information, and the DMRS configuration is one of a DMRS configuration set; 2034. and the terminal equipment receives the DMRS in the time slot for bearing the DMRS in the first time period according to the DMRS configuration.

That is, a set of DMRS configurations is determined, and then it is determined which one of the set of DMRS configurations the DMRS configuration is specific to. For example, according to the first indication information, it is determined that the DMRS configuration set is the DMRS set corresponding to the table 3, and it is determined that the DMRS configuration is the DMRS configuration corresponding to the index value 1, then it may be specifically determined that the DMRS configuration is: including

time slots

1 and 2 as first and second time slots, and time slot 4 as third and time slot 3 as fourth time slot.

Optionally, the DMRS configuration set is determined from a plurality of DMRS configuration sets according to the time length of the first period.

As can be seen from the foregoing description, the DMRS configuration set may relate to the length of the first period, that is, the DMRS configuration set may be specifically determined according to the number of slots included in the first period, and if the number of slots is different, the DMRS configuration set corresponding to the first period is also different.

For example, the first DMRS configuration set includes the DMRS configurations in table 1, the second DMRS configuration set includes the DMRS configurations in table 2 or includes the DMRS configurations in table 3, the DMRS configuration set is the first DMRS configuration set when the number of slots included in the first period is equal to 3, and the DMRS configuration set is the second DMRS configuration set when the number of slots included in the first period is equal to 4.

In this embodiment, the step 203 may specifically be: 2035. the terminal equipment receives first indication information; 2036, determining one DMRS configuration set from the plurality of DMRS configuration sets by the terminal device according to the length of the first time period; 2037. the method comprises the steps that terminal equipment first indication information and the DMRS configuration set determine DMRS configuration, and the DMRS configuration is one of the DMRS sets; 2038. and the terminal equipment receives the DMRS in the time slot for bearing the DMRS in the first time period according to the DMRS configuration.

That is, the terminal device may obtain multiple DMRS configuration sets according to other manners (the multiple DMRS configuration sets may also exist in a form of one integral set), then determine one DMRS configuration set according to the length of the first period (the DMRS configuration set may be an independent DMRS set in the multiple DMRS configuration sets or may be a subset in the integral DMRS set), and finally the terminal device determines the DMRS configuration in combination with the received first indication information.

In the foregoing execution of steps 2033 to 2034, since the DMRS configuration set needs to be determined, and the DMRS configuration set may be related to the length of the first period, optionally, the network device may indicate the length of the first period at the same time when sending the first indication information. Or the length of the first period may be indicated by separate second indication information. In this way, the terminal device can determine the DMRS configuration set according to the length of the first time period, and further determine the corresponding DMRS configuration.

For the above-mentioned execution of steps 2035 to 2038, it is necessary to determine one DMRS configuration set from the multiple DMRS configuration sets, and similarly, the DMRS configuration set may be related to the length of the first period, so the network device may indicate the length of the first period through the second indication information. Therefore, the terminal can determine one DMRS set according to the length of the first time period indicated by the second indication information, and then determine specific DMRS configuration according to the first indication information.

Specifically, the second indication information may be time period configuration information or uplink and downlink time slot configuration information. The time period configuration information indicates the length of the first time period directly. The uplink and downlink time slot configuration information may be the number of uplink time slots, the number of downlink time slots and the number of special time slots in one uplink and downlink configuration period, and since the signal phase sent in the first time period is continuous, the length of the first time period may be determined according to the uplink and downlink time slot configuration information. For example, the terminal device determines that the first period includes an uplink time slot in an uplink-downlink switching period indicated by the uplink-downlink time slot configuration information. Or the terminal equipment determines that the first time period does not comprise the time slot comprising the downlink symbol in the uplink and downlink switching period indicated by the uplink time slot.

Optionally, the terminal device determines, according to the DMRS configuration, the first time period and the time domain positions of the N time slots in the first time period, a time slot for carrying the DMRS from the N time slots, where the N time slots are consecutive time slots in which the terminal device receives the first downlink signal.

In some cases, after receiving the DMRS configuration and determining the length of the first period, the terminal device needs to determine the time slot in which the DMRS is located by combining N time slots for transmitting the downlink signal. Specifically, it is assumed that the terminal device determines a length l=4 of the first period, and the DMRS received by the terminal device is configured to: index 1. Then referring to table 2, it can be known that there are 3 slots that may carry DMRS in the first period, and 1 slot does not carry DMRS, as shown in fig. 6C (a). And when l=4 and the DMRS is configured as index 2, the case of carrying the DMRS in the slot may refer to (b) in fig. 6C.

In addition, the N time slots are consecutive time slots in which the terminal device receives the first downlink signal, and assume that n=3, and the time domain positions of the N time slots in the first time period are the first N time slots in the first time period. Then when it is determined that the DMRS is carried in a slot in the first period according to the first indication information, as in (a) in fig. 6C, it may be determined that the DMRS is carried in a first slot, a second slot, and a third slot of the N slots, as shown in (C) in fig. 6C. When the situation that the DMRS is carried in the time slot in the first period is determined according to the first indication information is shown in (b) in fig. 6C, the DMRS can be determined to be carried in the first two time slots in the N time slots, and the DMRS is not carried in the third time slot, specifically as shown in (d) in fig. 6C.

The first indication information determines the DMRS configuration by indicating an index in the DMRS configuration set. The method completes the indication of the DMRS configuration through very little resource overhead, and reduces the resource overhead for indicating the DMRS configuration.

There may be other indication manners besides indicating the DMRS configuration by means of an indication index.

Optionally, the first indication information indicates a first time slot and a second time slot corresponding to the DMRS configuration, and/or indicates a fourth time slot corresponding to the DMRS configuration, where the first time slot and the second time slot are indicated by at least one first indication unit, and the fourth time slot is indicated by at least one second indication unit.

That is, the first indication information indicates only the time slot carrying the DMRS in the DMRS configuration, the specific indication manner refers to fig. 6D, fig. 6D is a schematic diagram of a manner of indicating the DMRS configuration provided in the embodiment of the present application, as shown in (a) in fig. 6D, the first indication information is configured for the second DMRS, where the configuration includes a fourth time slot and at least one third time slot, the value of the second indication unit is (2, 2), which indicates that the time slot 2 includes the DMRS with 2 symbols in the first time slot, the time slot 2 is the fourth time slot, and the time slots that are not indicated in the remaining first time slots, including the time slot 1 and the time slot 3, are the third time slots. Or as shown in (b) of fig. 6D, a first DMRS configuration is configured, where the configuration includes a first time slot and a second time slot, and at least one third time slot, and the value of the first indication unit is (1, 2), which indicates that DMRS with 1 symbol are included in time slot 1 and time slot 2 in the first period, and time slot 1 and time slot 2 are the first time slot and the second time slot, and the time slots not indicated in the remaining first period, including time slot 3, are the third time slots.

The method determines the DMRS configuration by indicating the time slot for bearing the DMRS in the DMRS configuration, so that the terminal equipment can accurately correspond to the corresponding DMRS configuration in the DMRS configuration set without worrying about the occurrence of the situation of corresponding errors. The accuracy of indicating the DMRS configuration is ensured.

Optionally, the first indication information indicates a time slot for carrying the DMRS in the DMRS configuration that is increased and/or decreased compared to the preset DMRS configuration.

In some cases, after the terminal device determines the first period, the preset DMRS configuration may be obtained, where the preset DMRS configuration is one of DMRS configuration sets corresponding to the first period, for example, may be one of the DMRS configuration sets with the smallest index value, or may be one of the DMRS configuration sets with the highest use frequency. If the network device does not indicate any time slot in the first indication information, the terminal device may directly obtain, according to the first period, a preset DMRS configuration corresponding to the first period, where the time slot carrying the DMRS in the first period is determined. If the time slot is indicated in the first indication information, the indicated time slot may be a time slot for carrying the DMRS, which is increased and/or decreased compared to the preset DMRS configuration. Assuming that when the number of slots k=4 in the first period, the preset DMRS is configured to: the first time slot and the second time slot are time slot 1 and time slot 2, the third time slot is time slot 3, and the fourth time slot is time slot 4; and the first indication information indicates the time slot for carrying the DMRS with reduced time slot 4 bits, then it can be known that the time slot for carrying the DMRS is time slot 1 and time slot 2.

In the method, the DMRS configuration is determined by indicating the time slots for carrying the DMRS, which are increased and/or decreased compared with the preset DMRS configuration, in the DMRS configuration, in some cases, if the preset DMRS configuration is used, the content is not transmitted in the first indication information, so that the overhead of transmitting the first indication information is reduced, and meanwhile, the efficiency of determining the DMRS configuration by the terminal equipment is improved. The first indication information or the second indication information may be transmitted through radio resource control (radioresource control, RRC) signaling, or may be transmitted through downlink control information (downlink control information, DCI), or may be transmitted through other signaling or messaging.

Therefore, in the above process, the network device sends the first indication information to the terminal device to indicate one DMRS configuration in the DMRS configuration set, and the terminal device determines a time slot for carrying the DMRS in the first time period according to the first time period (may be indicated by the network device or may be determined by the terminal device according to other information) and the DMRS configuration, and further, when the terminal device receives N continuous time slots for transmitting the first downlink signal, the terminal device may also determine a time slot for carrying the DMRS in the N continuous time slots according to the time slot for carrying the DMRS in the determined first time period.

It can be seen that, in this embodiment of the present application, the first indication information is generated and sent by the network device to indicate the DMRS configuration, and the terminal device determines, according to the first indication information and the first period, a time slot for carrying the DMRS in the first period, so as to determine the time-frequency location of the DMRS later, and acquire the DMRS for performing channel estimation. In the process, the DMRS configuration set includes a first DMRS configuration and a second DMRS configuration, where the first DMRS configuration includes two slots for carrying one DMRS signal in a cross-slot OCC manner, and further includes slots for not carrying DMRS; the second DMRS configuration includes a DMRS signal carrying two symbols in one slot, and also includes a slot not carrying a DMRS. Therefore, when the network device transmits the DMRS, the DMRS signals with 1 symbol can be transmitted in two time slots respectively, so that the effect of supporting multi-layer space transmission by adopting 2-symbol DMRS is achieved, the DMRS overhead is reduced, in addition, the DMRS configured when the network device schedules a plurality of terminal devices can be flexibly aligned through the time slots without bearing the DMRS, and the scheduling flexibility of the network device is ensured.

Meanwhile, it should be noted that, the terminal device receives the DMRS signal according to the DMRS configuration to perform signal estimation, and for the time slot in which the DMRS exists, the terminal device may store the relevant information of the DMRS transmitted in the time slot, for example, store the received DMRS or store the channel estimation result of the DMRS, so as to be used for processing the received signal in the time slot in which the DMRS does not exist; for two time slots carrying the same DMRS signal in a cross-time slot OCC mode in the time slots with the DMRS, the terminal equipment needs to perform joint signal estimation; channel estimation is not performed for a slot in which DMRS is not present, but a downlink signal transmitted in the slot may be processed using a channel estimation result stored in a buffer.

After the network device determines the time slot for carrying the DMRS, and further determines the OFDM symbol for carrying the DMRS in the time slot according to other information, it is further required to acquire an OCC code corresponding to each DMRS signal (i.e., the DMRS signal corresponding to each DMRS port) so as to perform channel estimation on the DMRS signal. For example, in the 5G NR system, for DMRS port 4 and port 5 constituting CDM group 2 in fig. 2, DMRS port 4 and DMRS port 5 correspond to different OCC codes, such as: the [ +1, +1] and [ +1, -1] carry out weighting treatment on the DMRS sequence through OCC codes so as to obtain a DMRS signal corresponding to the DMRS port 4 and a DMRS signal corresponding to the DMRS port 5;

for

DMRS ports

4, 5, 10 and 11 in fig. 3, which constitute CDM group 2, the OCC code corresponding to each DMRS port is divided into two parts, namely a frequency domain OCC code and a time domain OCC code, specifically:

DMRS port 4: frequency domain [ +1, +1], time domain [ +1, +1];

DMRS port 5: frequency domain [ +1, -1], time domain [ +1, +1];

DMRS port 10: frequency domain [ +1, +1], time domain [ +1, -1];

DMRS port 11: frequency domain [ +1, -1], time domain [ +1, -1];

the product of the frequency domain OCC code and the time domain OCC code can obtain the OCC code for weighting the DMRS sequence, so as to further weight the DMRS; alternatively, the DMRS may be weighted in the frequency domain by the frequency domain OCC code and the time domain by the time domain OCC code, respectively. Specifically, taking DMRS port 4 and DMRS port 5 in fig. 3 as an example, it is assumed that all DMRS sequences corresponding to

REs

4, 5, 10, and 11 and DMRS sequences corresponding to

REs

16, 17, 22, and 23 are [ r, s, t, and z ], the frequency domain OCC code [ x= +1, y= +1] of the DMRS port 4, the time domain OCC code [ m= +1, n= +1] of the DMRS port 4, the DMRS sequences corresponding to the DMRS port 4 subjected to OCC weighting processing are [ x m x r, x is n, y is m is t, y is n is z = [ +r, +s, +t, +z ], frequency domain OCC code [ x= +1, y= -1] of DMRS port 5, time domain OCC code [ m= +1, n= +1] of DMRS port 5, DMRS port 5 after OCC weighting treatment corresponds to DMRS sequence of [ x m, x n s, y x m t, y n z ] = [ +r, +s, -t, -z ].

In the 5G NR system, the DMRS sequence is weighted by using the frequency domain OCC in the frequency domain according to the index of the subcarrier, and the DMRS sequence is weighted by using the time domain OCC according to the index of the OFDM symbol. For example, as in DMRS port 4 in fig. 3, the frequency domain OCC code of DMRS port 4 [ x= +1, y= +1], the time domain OCC code of DMRS port 4 [ m= +1, n= +1], DMRS sequence values on odd-numbered subcarriers are weighted using x= +1, DMRS sequence values on odd-numbered subcarriers are weighted using y= +1, DMRS sequence values on 2 nd OFDM symbol are weighted using m= +1, and DMRS sequence values on fourth OFDM symbol are weighted using n= +1. However, in the case of cross-slot OCC, if DMRS sequences are weighted using time domain OCC according to the index of OFDM symbols in the time domain, there is a problem that the OCC codes obtained from the frequency domain OCC and the time domain OCC are not orthogonal. For example, in two consecutive time slots, cross-slot OCC is performed, when the 4 th OFDM symbol is used to carry DMRS in the first time slot and the 4 th OFDM symbol is used to carry DMRS in the second time slot, the two time slots both weight the DMRS sequence using the first bit of the time domain OCC in the time domain, and accordingly, for example, DMRS port 5 and DMRS port 11, the OCC codes used by DMRS port 5 and DMRS port 11 are [ +1, -1, -1, +1], so that mutual interference exists between DMRS corresponding to DMRS port 5 and DMRS port 11, and reception performance is affected.

To solve the above problem, the generated DMRS sequence r (n) is mapped to RE (k, l) in the following manner _p The upper part of the upper part is provided with a plurality of grooves,

k′＝0,1

wherein, the liquid crystal display device comprises a liquid crystal display device,

for the symbol on the kth subcarrier in the kth OFDM symbol of the s-th slot, beta is a power amplification factor, w _f (k ') is a frequency domain weight determined according to the subcarrier index k (the frequency domain weights corresponding to k ' =0 and k ' =1 are referred to as a frequency domain OCC), w _t And (s') is a time domain weight determined according to the time slot index and the DMRS ports (two time domain weights in the odd time slots and the even time slots can be called a time domain OCC, the time domain OCC and the frequency domain OCC are used for orthogonalizing DMRS sequences corresponding to different DMRS ports mapped on the same time frequency resource, so as to avoid mutual interference of simultaneous and same-frequency transmission of DMRS signals corresponding to different DMRS ports), and r (k) is a value corresponding to a kth subcarrier in the DMRS sequences.

Wherein, the partial signal of the first DMRS is carried in the first time slot, and the first time slot is carried in the second time slotUnder the condition of the other part of signals of the DMRS, a complete DMRS signal is carried in two time slots, so that one code word in two code words of the OCC is respectively determined according to the first time slot and the second time slot to form the OCC corresponding to the first time slot and the second time slot, namely, the OCCs corresponding to the two time slots are the same. Assuming that a first OFDM symbol in a first time slot carries a part of the signal of a first DMRS and a second OFDM symbol in a second time slot carries another part of the signal of the first DMRS, since the first OFDM symbol and the second OFDM symbol occupy the same frequency domain resource, βw of the first time slot and the second time slot _f The values of (k') r (k) are the same. Assume that the first OFDM symbol of the first slot is a symbol on the kth subcarrier

Symbols of the second OFDM symbol of the second slot on the kth subcarrier +.>

Time domain weight w of first OFDM symbol _t (s')=a, time domain weight w of the second OFDM symbol _t (s')=b, the following relationship is satisfied: a/a=b/B.

Note that, unlike the OFDM symbol, a symbol may be understood as a signal value mapped to the kth subcarrier of the ith symbol.

And for w _t (s') possible values are shown in Table 4:

TABLE 4 Table 4

Wherein p is ₀ ,p ₁ ,p _j+1 ,p _j+2 For DMRS ports belonging to the first CDM group, p ₂ ,p ₃ ,p _j+3 ,p _j+4 For DMRS ports belonging to the second CDM group, and so on, each CDM group includes 4 DMRS ports.

I.e. w can be determined from the parity of the slot index _t A value of (s').

It is assumed that a w is determined from the slot index of the first slot in the manner described in the above table _t After the value a of (s'), w corresponding to the second time slot can be correspondingly determined _t (s') value b. Because the OCC in the time domain can take on values of [ +1, +1]，[+1,-1]Or [ -1, +1]Then after determining a, b may be correspondingly determined, as shown in the table:

TABLE 5

Wherein, the port p in the table ₀ Port 0, representing the foregoing description, correspondingly, port p ₁ ～p _2j Representing ports 1 through 2*j. As shown in table 5, assuming that the first and second slots are slot 0 and slot 1, respectively, their corresponding time domain OCCs may be [ +1, +1]And [ +1, +1]May also be [ -1, +1 ]]And [ -1, +1]The method comprises the steps of carrying out a first treatment on the surface of the Assuming that the first and second slots are slot 1 and slot 2, respectively, their corresponding time domain OCCs may be [ +1, +1 [ + ]]And [ +1, +1]It is also possible to be [ +1, -1]And [ +1, -1]。

It can be seen that, in the embodiment of the present application, when a part of the signal of the first DMRS is carried in the first time slot and another part of the signal of the first DMRS is carried in the second time slot, the OCC code words of the first time slot and the second time slot are determined according to the time slot index of the first time slot and/or the time slot index of the second time slot, so that the interference problem caused by weighting the multiple DMRS signals transmitted on the same time-frequency resource by using the same OCC sequence or the OCC sequences that are not orthogonal to each other can be avoided. Meanwhile, the terminal processes the DMRS of the cross-slot OCC according to the slot index, so that the complexity of determining the OCC code is low.

Fig. 7 is a schematic diagram of a communication apparatus 700 according to an embodiment of the present application, which may be used to perform the method and the specific embodiment performed by the network device of fig. 6A to 6D. In one possible implementation, as shown in fig. 7, the apparatus 700 includes a processing unit 702 and a transmitting unit 703.

A processing unit 702, configured to generate first indication information, where the first indication information indicates a demodulation reference signal DMRS configuration, and the DMRS configuration is used for determining, by a terminal device, a time slot for carrying the DMRS in a first time period, where the first time period includes at least two time slots;

a transmitting unit 703 configured to transmit the first indication information;

the DMRS configuration is one of a set of DMRS configurations, wherein the set of DMRS configurations includes a first DMRS configuration and a second DMRS configuration, and the first DMRS configuration is used for indicating: the first time slot and the second time slot are used for bearing the first DMRS, and the third time slot does not bear the DMRS; the first time period comprises a first time slot, a second time slot and at least one third time slot, wherein the first time slot is used for bearing part of signals of the first DMRS, and the second time slot is used for bearing the other part of signals of the first DMRS; the second DMRS is configured to indicate: the third time slot is not used for carrying the DMRS, and the fourth time slot is used for carrying the second DMRS, wherein the first time period includes the fourth time slot and at least one third time slot.

Optionally, the symbol a on the nth subcarrier in the first OFDM symbol and the symbol B on the nth subcarrier in the second OFDM symbol satisfy: the values of a/a=b/B satisfy one of the following: a=1, b=1; a=1, b= -1; or a= -1, b = 1, wherein the first OFDM symbol is an OFDM symbol in the first slot for carrying a part of the signal of the first DMRS, and the second OFDM symbol is an OFDM symbol in the second slot for carrying another part of the signal of the first DMRS.

Optionally, the values of a and b are determined according to the DMRS port corresponding to the first DMRS, the first time domain index of the first slot, and the second time domain index of the second slot.

Optionally, the DMRS configuration set further includes a third DMRS configuration, where the third DMRS configuration is configured to indicate: the first time slot and the second time slot are used for bearing the first DMRS, the fourth time slot is used for bearing the second DMRS, and the third time slot does not bear the DMRS, wherein the first time slot comprises the first time slot, the second time slot, the fourth time slot and at least one third time slot.

Optionally, the sending unit 703 is further configured to indicate the first period of time.

Alternatively, the transmitting unit 703 indicates the first period by transmitting second indication information, which is period configuration information or uplink and downlink slot configuration information.

Optionally, the first indication information indicates the DMRS configuration by: an index indicating the DMRS configuration in a DMRS configuration set, the DMRS configuration set being determined from a plurality of DMRS configuration sets according to a time length of the first time period; indicating a first time slot and a second time slot in the DMRS configuration, and/or indicating a fourth time slot in the DMRS configuration, wherein the first time slot and the second time slot are indicated by at least one first indication unit, and the fourth time slot is indicated by at least one second indication unit; and indicating the time slots used for bearing the DMRS in the DMRS configuration, which are increased and/or decreased compared with the preset DMRS configuration.

Optionally, the time slots in the first time period carry signals that are phase-continuous.

Alternatively, the processing unit 702 may be a central processing unit (Central Processing Unit, CPU).

Optionally, the communication apparatus 700 may further include a receiving unit 701, and the transmitting unit 703 and the receiving unit 701 may be interface circuits or transceivers. For receiving or transmitting data or instructions from other electronic devices.

Optionally, the communication device 700 may further comprise a storage unit (not shown in the figure), which may be used for storing data and/or signaling, and which may be coupled to the receiving unit 701, the transmitting unit 703 and the processing unit 702. For example, the processing unit 702 may be configured to read data and/or signaling in the storage unit, so that the channel processing procedure in the foregoing method embodiment is performed.

Fig. 8 is a schematic diagram of a communication apparatus 800 according to an embodiment of the present application, which may be used to execute the method and the specific embodiment executed by the terminal device of fig. 6A to 6D. In one possible implementation, as shown in fig. 8, the apparatus 800 includes a receiving unit 802 and a processing unit 803.

A receiving unit 802, configured to receive first indication information, where the first indication information indicates a demodulation reference signal DMRS configuration, and the DMRS configuration is used for determining, by a terminal device, a time slot for carrying the DMRS in a first time period, where the first time period includes at least two time slots;

A processing unit 803, configured to receive, by using the receiving unit 802, the DMRS in a time slot for carrying the DMRS in the first period according to the first period and the DMRS configuration; the DMRS configuration is one of a set of DMRS configurations, wherein the set of DMRS configurations includes a first DMRS configuration and a second DMRS configuration, and the first DMRS configuration is used for indicating: the first time slot and the second time slot are used for bearing the first DMRS, and the third time slot does not bear the DMRS; the first time period comprises a first time slot, a second time slot and at least one third time slot, wherein the first time slot is used for bearing part of signals of the first DMRS, and the second time slot is used for bearing the other part of signals of the first DMRS; the second DMRS is configured to indicate: the third time slot is not used for carrying the DMRS, and the fourth time slot is used for carrying the second DMRS, wherein the first time period includes the fourth time slot and at least one third time slot.

Optionally, the processing unit 803 is further configured to: according to the DMRS configuration, determining a time slot for bearing the DMRS in the N time slots according to the time domain positions of the first time slot and the N time slots in the first time slot, wherein the N time slots are continuous time slots for receiving the first downlink signal by the terminal equipment.

Optionally, the receiving unit 802 is further configured to: receiving second indication information, wherein the second indication information is time period configuration information or uplink and downlink time slot configuration information; the processing unit 803 is further configured to: the first time period is determined based on the second indication information.

Alternatively, the processing unit 803 may be a central processing unit (Central Processing Unit, CPU).

Optionally, the communication apparatus 800 further includes a transmitting unit 801, and the receiving unit 802 and the transmitting unit 801 may be interface circuits or transceivers. For receiving or transmitting data or signaling from other electronic devices.

Optionally, the communication device 800 may further comprise a storage unit (not shown in the figure), which may be used for storing data and/or signaling, and which may be coupled to the receiving unit 802, the transmitting unit 801 and the processing unit 803.

As shown in fig. 9, fig. 9 shows a schematic hardware structure of an electronic device in an embodiment of the present application. The structures of the communication apparatus 700 and the communication apparatus 800 can refer to the structure shown in fig. 9. The electronic device 1000 includes: memory 1001, processor 1002, communication interface 1003, and bus 1004. The memory 1001, the processor 1002, and the communication interface 1003 are connected to each other by a bus 1004.

The Memory 1001 may be a Read Only Memory (ROM), a static storage device, a dynamic storage device, or a random access Memory (Random Access Memory, RAM). The memory 1001 may store a program, and when the program stored in the memory 1001 is executed by the processor 1002, the processor 1002 and the communication interface 1003 are used to perform the respective steps of the distributed rendering method of the embodiment of the present application.

The processor 1002 may be a general-purpose CPU, microprocessor, application-specific integrated circuit (Application Specific Integrated Circuit, ASIC), GPU, or one or more integrated circuits for executing related programs to implement the functions required to be performed by the receiving unit 701, the processing unit 702, and the transmitting unit 703 in the communication device 700, or implement the functions required to be performed by the transmitting unit 801, the receiving unit 802, and the processing unit 803 in the communication device 800, or perform the information transmission method of the method embodiment of the present application.

The processor 1002 may also be an integrated circuit chip with signal processing capabilities. In implementation, various steps of the distributed rendering methods of the present application may be accomplished by instructions in the form of integrated logic circuits or software of hardware in the processor 1002. The processor 1002 may also be a general purpose processor, a digital signal processor (Digital Signal Processing, DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf programmable gate array (Field Programmable Gate Array, FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware components. The disclosed methods, steps, and logic blocks in the embodiments of the present application may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of a method disclosed in connection with the embodiments of the present application may be embodied directly in hardware, in a decoded processor, or in a combination of hardware and software modules in a decoded 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 the memory 1001, and the processor 1002 reads information in the memory 1001, and combines the hardware thereof to perform functions required to be performed by the module included in the communication device 700 or the communication device 800 according to the embodiment of the present application, or perform a downlink power control method according to the embodiment of the present application.

Communication interface 1003 enables communication between electronic device 1000 and other equipment or communication networks using a transceiver device such as, but not limited to, a transceiver. For example, the determined segmented target and/or candidate target bounding boxes may be obtained through the communication interface 1003. Bus 1004 may include a path to transfer information between various components of electronic device 1000 (e.g., memory 1001, processor 1002, communication interface 1003).

It should be noted that although the electronic device 1000 shown in fig. 9 only shows a memory, a processor, a communication interface, those skilled in the art will appreciate that in a particular implementation, the electronic device 1000 also includes other components necessary to achieve proper operation. Also, as will be appreciated by those skilled in the art, the electronic device 1000 may also include hardware components that perform other additional functions, as desired. Furthermore, it will be appreciated by those skilled in the art that the electronic device 1000 may also include only the components necessary to implement the embodiments of the present application, and not necessarily all of the components shown in fig. 9.

The embodiment of the application also provides a communication system, which comprises a first communication device and a second communication device, wherein the first communication device can be used for executing the method executed by the network equipment of fig. 6A-6D, and the second communication device can be used for executing the method executed by the terminal equipment of fig. 6A-6D.

Furthermore, the present application provides a computer program for implementing the operations and/or processes performed by the first communication device in the method provided in the present application.

The present application also provides a computer program for implementing the operations and/or processes performed by the second communication device in the methods provided herein.

The present application also provides a computer readable storage medium having stored therein a computer program or computer executable instructions which, when run on a computer, cause the computer to perform the operations and/or processes performed by the first communication device in the methods provided herein.

The present application also provides a computer readable storage medium having stored therein a computer program or computer executable instructions which, when run on a computer, cause the computer to perform the operations and/or processes performed by the second communication device in the methods provided herein.

The present application also provides a computer program product comprising computer executable instructions or a computer program which, when run on a computer, cause operations and/or processing performed by the first communication device in the method provided by the present application to be performed.

The present application also provides a computer program product comprising computer executable instructions or a computer program which, when run on a computer, cause operations and/or processes performed by the second communication device in the methods provided herein to be performed.

It should be understood that, in various embodiments of the present application, the sequence numbers of the foregoing processes do not mean the order of execution, and the order of execution of the processes should be determined by the functions and internal logic thereof, and should not constitute any limitation on the implementation process of the embodiments of the present application.

Those of ordinary skill in the art will appreciate that the various illustrative modules 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 clearly understood by those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described system, apparatus and module may refer to corresponding procedures in the foregoing method embodiments, which 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 modules is merely a logical function division, and there may be additional divisions of actual implementation, e.g., multiple modules 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 modules, which may be in electrical, mechanical, or other forms.

The modules illustrated as separate components may or may not be physically separate, and components shown as modules may or may not be physical modules, i.e., may be located in one place, or may be distributed over a plurality of network modules. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

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

The functions, if implemented in the form of software functional modules and sold or used as a stand-alone product, may be stored on 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 of the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a read-only memory (ROM), a random access memory (random access memory, RAM), a magnetic disk, or an optical disk, or other various media capable of storing program codes.

Claims

1. An information transmission method, the method comprising:

the method comprises the steps that a network device generates first indication information, wherein the first indication information indicates demodulation reference signal (DMRS) configuration, the DMRS configuration is used for determining a time slot for bearing the DMRS in a first time period by the terminal device, and the first time period comprises at least two time slots;

The network equipment sends the first indication information;

the DMRS configuration is one of a set of DMRS configurations, the set of DMRS configurations includes a first DMRS configuration and a second DMRS configuration, and the first DMRS configuration is used for indicating: the first time slot and the second time slot are used for bearing the first DMRS, and the third time slot does not bear the DMRS; wherein the first time period includes the first time slot, the second time slot, and at least one of the third time slots, the first time slot is used for carrying a part of signals of a first DMRS, and the second time slot is used for carrying another part of signals of the first DMRS;

the second DMRS is configured to indicate: the third time slot is not used for bearing the DMRS, the fourth time slot is used for bearing the second DMRS, and the first time period includes the fourth time slot and at least one third time slot.

2. The method of claim 1, wherein symbol a on an nth subcarrier in the first OFDM symbol and symbol B on an nth subcarrier in the second OFDM symbol satisfy:

the values of a/a=b/B satisfy one of the following: a=1, b=1; a=1, b= -1; or a= -1, b=1, wherein the first OFDM symbol is an OFDM symbol in the first slot for carrying a part of the signal of the first DMRS, and the second OFDM symbol is an OFDM symbol in the second slot for carrying another part of the signal of the first DMRS.

3. The method of claim 2, wherein the values of a and b are determined based on the DMRS port to which the first DMRS corresponds, a first time domain index of the first time slot, and a second time domain index of the second time slot.

4. The method of any of claims 1 to 3, wherein the set of DMRS configurations further comprises a third DMRS configuration, the third DMRS configuration being configured to indicate: the first time slot and the second time slot are used for bearing a first DMRS, the fourth time slot is used for bearing a second DMRS, and the third time slot does not bear a DMRS, wherein the first time period includes the first time slot, the second time slot, the fourth time slot and at least one of the third time slots.

5. The method according to any one of claims 1 to 4, further comprising:

the network device indicates the first time period.

6. The method of claim 5, wherein the network device indicates the first time period by sending second indication information, the second indication information being time period configuration information or uplink and downlink time slot configuration information.

7. The method of any one of claims 1 to 6, wherein the first indication information indicates the DMRS configuration by: an index indicating the DMRS configuration in the DMRS configuration set, the DMRS configuration set being determined from a plurality of DMRS configuration sets according to a time length of the first time period;

Indicating the first and second time slots in the DMRS configuration, and/or indicating the fourth time slot in the DMRS configuration, wherein the first and second time slots are indicated by at least one first indication element and the fourth time slot is indicated by at least one second indication element;

and indicating the time slot used for bearing the DMRS and increased and/or decreased compared with the preset DMRS configuration in the DMRS configuration.

8. The method of claim 1, wherein the time slots in the first time period carry signals that are phase-continuous.

9. An information receiving method, the method comprising:

the method comprises the steps that a terminal device receives first indication information, wherein the first indication information indicates demodulation reference signal (DMRS) configuration, the DMRS configuration is used for determining a time slot for bearing the DMRS in a first time period, and the first time period comprises at least two time slots;

the terminal equipment receives the DMRS in a time slot for bearing the DMRS in the first time period according to the first time period and the DMRS configuration;

10. The method of claim 9, wherein symbol a on the nth subcarrier in the first OFDM symbol and symbol B on the nth subcarrier in the second OFDM symbol satisfy:

11. The method of claim 10, wherein the values of a and b are determined based on the DMRS port to which the first DMRS corresponds, a first time domain index of the first time slot, and a second time domain index of the second time slot.

12. The method of claim 9, wherein the set of DMRS configurations further comprises a third DMRS configuration, the third DMRS configuration being configured to indicate: the first time slot and the second time slot are used for bearing a first DMRS, the fourth time slot is used for bearing a second DMRS, and the third time slot does not bear a DMRS, wherein the first time period includes the first time slot, the second time slot, the fourth time slot and at least one of the third time slots.

13. The method according to any one of claims 9 to 12, further comprising:

and the terminal equipment determines a time slot for bearing the DMRS in the N time slots according to the DMRS configuration, the time slot position of the first time slot and the N time slots in the first time slot, wherein the N time slots are continuous time slots for the terminal equipment to receive a first downlink signal.

14. The method according to any one of claims 9 to 13, further comprising:

receiving second indication information, wherein the second indication information is time period configuration information or uplink and downlink time slot configuration information;

and determining the first time period according to the second indication information.

15. The method of any of claims 9 to 14, wherein the first indication information indicates the DMRS configuration by:

an index indicating the DMRS configuration in the DMRS configuration set, the DMRS configuration set being determined from a plurality of DMRS configuration sets according to a time length of the first time period;

16. An information transmitting apparatus, characterized in that the apparatus comprises:

a processing unit, configured to generate first indication information, where the first indication information indicates a demodulation reference signal DMRS configuration, where the DMRS configuration is used for the terminal device to determine a time slot for carrying the DMRS in a first time period, where the first time period includes at least two time slots;

a transmitting unit, configured to transmit the first indication information;

17. The apparatus of claim 16, wherein symbol a on an nth subcarrier in the first OFDM symbol and symbol B on an nth subcarrier in the second OFDM symbol satisfy:

18. The apparatus of claim 17, wherein the values of a and b are determined based on a DMRS port corresponding to the first DMRS, a first time domain index of the first time slot, and a second time domain index of the second time slot.

19. The apparatus of any of claims 16 to 18, wherein the set of DMRS configurations further comprises a third DMRS configuration, the third DMRS configuration configured to indicate: the first time slot and the second time slot are used for bearing a first DMRS, the fourth time slot is used for bearing a second DMRS, and the third time slot does not bear a DMRS, wherein the first time period includes the first time slot, the second time slot, the fourth time slot and at least one of the third time slots.

20. The apparatus according to any one of claims 16 to 19, wherein the transmitting unit is further configured to indicate the first time period.

21. The apparatus according to claim 20, wherein the transmitting unit indicates the first period of time by transmitting second indication information, the second indication information being period configuration information or uplink and downlink slot configuration information.

22. The apparatus of any one of claims 16 to 21, wherein the first indication information indicates the DMRS configuration by: an index indicating the DMRS configuration in the DMRS configuration set, the DMRS configuration set being determined from a plurality of DMRS configuration sets according to a time length of the first time period;

23. The apparatus of claim 16, wherein the time slots in the first time period carry phase-continuous signals.

24. An information receiving apparatus, characterized in that the apparatus comprises:

a receiving unit, configured to receive first indication information, where the first indication information indicates a demodulation reference signal DMRS configuration, where the DMRS configuration is used for the terminal device to determine a time slot for carrying the DMRS in a first time period, where the first time period includes at least two time slots;

a processing unit, configured to receive, by the receiving unit, a DMRS in a time slot for carrying the DMRS in the first period according to the first period and the DMRS configuration;

25. The apparatus of claim 9, wherein symbol a on an nth subcarrier in the first OFDM symbol and symbol B on an nth subcarrier in the second OFDM symbol satisfy:

26. The apparatus of claim 25, wherein the values of a and b are determined based on a DMRS port corresponding to the first DMRS, a first time domain index of the first time slot, and a second time domain index of the second time slot.

27. The apparatus of claim 24, wherein the set of DMRS configurations further comprises a third DMRS configuration, the third DMRS configuration being configured to indicate: the first time slot and the second time slot are used for bearing a first DMRS, the fourth time slot is used for bearing a second DMRS, and the third time slot does not bear a DMRS, wherein the first time period includes the first time slot, the second time slot, the fourth time slot and at least one of the third time slots.

28. The apparatus of any one of claims 24 to 27, wherein the processing unit is further configured to:

and determining a time slot for bearing the DMRS in the N time slots according to the time domain positions of the first time slot and the N time slots in the first time slot, wherein the N time slots are continuous time slots for receiving a first downlink signal by the terminal equipment.

29. The apparatus according to any one of claims 24 to 28, wherein the receiving unit is further configured to: receiving second indication information, wherein the second indication information is time period configuration information or uplink and downlink time slot configuration information;

the processing unit is further configured to: and determining the first time period according to the second indication information.

30. The apparatus of any one of claims 24 to 29, wherein the first indication information indicates the DMRS configuration by:

31. A computer readable storage medium having instructions stored thereon for implementing the method of any of claims 1 to 8 or the method of any of claims 9 to 15 when the instructions are executed.

32. A chip system, comprising: a processor for executing a stored computer program for executing the method of any one of claims 1 to 8 or the method of any one of claims 9 to 15.

33. A computer program product, the computer program product comprising: computer program which, when run, causes the method of any one of claims 1 to 8 to be performed or causes the method of any one of claims 9 to 15 to be performed.