WO2018228537A1

WO2018228537A1 - Information sending and receiving method and apparatus

Info

Publication number: WO2018228537A1
Application number: PCT/CN2018/091522
Authority: WO
Inventors: 铁晓磊; 张鹏; 杨育波
Original assignee: 华为技术有限公司
Priority date: 2017-06-16
Filing date: 2018-06-15
Publication date: 2018-12-20
Also published as: CN109150463B; CN109150463A

Abstract

Embodiments of the present application provide an information sending and receiving method and apparatus. The method comprises: when sending a control channel and a data channel scheduled for a target terminal within a same transmission time unit, a network device sends a reference signal over a preset frequency resource on a subsequent modulation symbol of a modulation symbol where the control channel is located, and sends the data channel over a frequency resource allocated for the target terminal to enable the target terminal receive the reference signal and the data channel at a corresponding position; or the network device generates indication information used for indicating whether data of the target terminal and a reference signal for demodulating data are sent in CORESET of the control channel, and sends the indication information to the target terminal by means of the control channel, thereby enabling the target terminal to receive the indication information, and receive the reference signal for demodulating data on the basis of the indication information. Reference signals independently sent over a data channel are saved, the resource utilization is improved, and the transmission reliability of a URLLC service is improved.

Description

Information transmitting and receiving method and device

The present application claims the priority of the Chinese Patent Application, which is filed on June 16, 2017, the Chinese Patent Application No. PCT Application No. .

Technical field

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

Background technique

In the fifth generation (5G) mobile communication system, ultra reliable and low latency communications (URLLC) are an important application scenario. The URLLC service has ultra-high reliability and low latency. Time, less data transmission and suddenness.

In the 5G mobile communication system, a control resource set (CORESET) is introduced, and CORESET corresponds to a time-frequency resource. A CORESET is for a group of users, and the downlink control channel of the group of users is sent on the CORESET. Each user can have multiple CORESETs. Each user has a search space on a CORESET. The resources of the search space are less than or equal to the resources of the CORESET. The user blindly detects the allocated search space according to a predefined rule. There is no own control channel to communicate with the base station on its own control channel. Currently, the physical downlink control channel (PDCCH) and the physical downlink shared channel (PDSCH) of the URLLC user respectively transmit their own demodulation reference signals (DMRS).

However, for the URLLC service in which the PDCCH and the PDSCH are both highly reliable, the PDCCH and the PDSCH respectively transmit the required DMRS, that is, the reference signal and the reference signal required for the separate transmission of the control channel and the data channel in the existing URLLC service transmission process. The overhead occupied by the overhead is large, and the resources used for transmitting data are less, thereby increasing the coding rate of the data, resulting in low transmission reliability of the URLLC service.

Summary of the invention

The present invention provides a method and a device for transmitting and receiving information, which are used to solve the reference signal required for the separate transmission of the control channel and the data channel in the transmission process of the existing URLLC service, resulting in a large overhead of the reference signal and low reliability of the URLLC service transmission. problem.

A first aspect of the present application provides a method for transmitting information, including: when a network device sends a control channel and a data channel scheduled to a target terminal in a same transmission time unit, where the network device is in a modulation symbol where the control channel is located Transmitting a reference signal RS on a preset frequency resource on the modulation symbol, where the preset frequency resource is a subset of frequency resources allocated to the target terminal; and the frequency resource allocated by the network device to the target terminal The data channel is transmitted on.

In this embodiment, when the network device sends the control channel and the data channel in the same transmission time unit, the reference signal is sent only on the preset frequency resource on the subsequent modulation symbol of the modulation symbol where the control channel is located, and the preset frequency resource is used. Is a subset of the frequency resources allocated to the target terminal, and transmits the data channel on the frequency resource allocated to the target terminal, which can save the reference signal separately transmitted on the data channel, thereby improving resource utilization, in the case of the same resource allocation. Improve the reliability of the URLLC service transmission process.

A second aspect of the present application provides an information receiving method, including: when a terminal detects a control channel scheduled for the terminal in a control channel resource set CORESET, and receives the control channel and the data channel in the same transmission time unit Receiving, by the terminal, a reference signal RS on a preset frequency resource on a subsequent modulation symbol of the modulation symbol where the control channel is located, where the preset frequency resource is a subset of frequency resources allocated to the terminal; Receiving the data channel on the frequency resource allocated to the terminal.

In this embodiment, when the terminal detects a control channel scheduled for the terminal in the CORESET and receives the control channel and the data channel in the same transmission time unit, the pre-modulation symbol on the modulation symbol where the control channel is located is pre- The frequency resource is received on the reference signal, and the data channel is received on the frequency resource allocated to the terminal, so that the terminal can demodulate the received data channel according to the received reference signal, thereby reducing resources occupied by the reference signal and improving resources. Utilization rate.

A third aspect of the present application provides a method for transmitting information, including: generating, by a network device, data for indicating whether to transmit a target terminal in a control channel resource set CORESET of a control channel, and indicating information of a reference signal for demodulating data; The network device sends the indication information to the target terminal through the control channel.

In this embodiment, the network device may generate indication information, and use the indication information to indicate whether the data of the target terminal and the reference signal for demodulating data are sent in the CORESET of the control channel, and then the network device sends the indication information through the control channel. To the target terminal, the target terminal can receive the data according to the indication information and the reference signal used for demodulating the data, thereby improving the resource utilization of the system and improving the reliability of the URLLC transmission.

In an embodiment of the third aspect, the method further includes:

Transmitting, by the network device, data of the target terminal and data for demodulating data in the CORESET when the indication information indicates that the data of the target terminal and a reference signal for demodulating data are transmitted in the CORESET Reference signal.

In another embodiment of the third aspect of the present application, the method further includes:

Notifying that the data of the target terminal and the reference signal for demodulating the data are not transmitted in the CORESET, and the network device transmits the control channel scheduled to the target terminal in the same transmission time unit and When the data channel is used, the network device sends a reference signal RS on a preset frequency resource on a subsequent modulation symbol of the modulation symbol where the control channel is located, where the preset frequency resource is a sub-frequency resource allocated to the target terminal. The network device transmits the data channel on the frequency resource allocated to the target terminal.

A fourth aspect of the present application provides a method for receiving information, including:

The terminal receives the indication information by using the control channel, where the indication information is used to indicate whether the data of the terminal and the reference signal for demodulating data are sent in the CORESET; the terminal receives the reference signal for demodulating the data according to the indication information. .

In this embodiment, the terminal receives the reference signal for demodulating the data according to the received indication information, so that the terminal can multiplex the reference signals of the control channel and the data channel, thereby saving resource consumption of the reference signal and improving system resources. Utilization, which in turn improves the reliability of URLLC transmission.

In an embodiment of the fourth aspect, the terminal, according to the indication information, receiving a reference signal for demodulating data includes:

When the indication information indicates data for transmitting the terminal and a reference signal for demodulating data in the CORESET, the terminal receives data of the terminal and a reference signal for demodulating data in the CORESET.

In another embodiment of the fourth aspect, the receiving, by the terminal, the reference signal for demodulating data according to the indication information, when the indication information indicates that the data of the terminal is not sent in the CORESET, and When demodulating the reference signal of the data, the terminal does not receive the data of the terminal and the reference signal for demodulating the data within the CORESET.

In the above embodiment of the fourth aspect, the method further includes: after the terminal detects the control channel sent to the terminal in the CORESET, the terminal transmits the control in the same transmission time unit The same reference signal port is multiplexed for both the channel and the data channel.

In still another embodiment of the fourth aspect, the receiving, by the terminal, the reference signal for demodulating the data according to the indication information includes:

When the indication information indicates that the data of the terminal and a reference signal for demodulating data are not transmitted in the CORESET, and the terminal receives the control channel and data scheduled to the terminal in the same transmission time unit Receiving, by the terminal, a reference signal RS on a preset frequency resource on a subsequent modulation symbol of a modulation symbol where the control channel is located, where the preset frequency resource is a subset of frequency resources allocated to the terminal; The terminal receives the data channel on the frequency resource allocated to the terminal.

Optionally, in an embodiment of the first aspect and the third aspect, the method further includes:

The network device sends the reference signal on a first frequency resource in a modulation symbol in which the control channel is located, where the first frequency resource is a control channel resource set CORESET allocated to a frequency resource of the target terminal The part of the frequency resource that is occupied.

Optionally, in another embodiment of the first aspect and the third aspect, the method further includes: the network device further sending the reference on a second frequency resource within a modulation symbol in which the control channel is located a signal, wherein the second frequency resource is a frequency resource occupied by the control channel.

Optionally, in an embodiment of the second aspect and the fourth aspect, the method further includes:

Receiving, by the terminal, the reference signal on a first frequency resource in a modulation symbol in which the control channel is located, where the first frequency resource is a frequency occupied by the CORESET in a frequency resource allocated to the terminal Part of the resource.

Optionally, in another embodiment of the second aspect and the fourth aspect, the method further includes:

The terminal receives the reference signal on a second frequency resource in a modulation symbol in which the control channel is located, where the second frequency resource is a frequency resource occupied by the control channel.

Optionally, in the foregoing embodiment of the fourth aspect, the method further includes:

The terminal demodulates the received data based on the reference signal received within the CORESET and the reference signal received on the first frequency resource.

In the communication methods provided by the foregoing aspects and the embodiments of the present disclosure, the meanings of the preset frequency resource, the first frequency resource, and the second frequency resource may include the following possible implementation manners:

Optionally, the preset frequency resource and the second frequency resource do not intersect, and the union of the preset frequency resource and the second frequency resource is a frequency resource occupied by the CORESET.

Correspondingly, in an embodiment of the foregoing second aspect and the fourth aspect, the method further includes:

The terminal demodulates data carried by the data channel according to a reference signal received on the preset frequency resource, a reference signal received on a first frequency resource, and a reference signal received on a second frequency resource.

Optionally, the preset frequency resource is a frequency resource occupied by the CORESET.

Correspondingly, in another embodiment of the foregoing second aspect and the fourth aspect, the method further includes:

The terminal demodulates data carried by the data channel according to a reference signal received on the preset frequency resource and a reference signal received on the first frequency resource.

Optionally, the unit of the frequency resource is a resource block RB.

A fifth aspect of the embodiments of the present application provides an information transmitting apparatus, where the information transmitting apparatus includes a processor and a memory, the memory is used to store a program, and the processor calls a program stored in the memory to execute the method provided by the first aspect of the present application.

A sixth aspect of the embodiments of the present application provides an information receiving apparatus, where the information receiving apparatus includes a processor and a memory, the memory is used to store a program, and the processor calls a program stored in the memory to execute the method provided by the second aspect of the present application.

A seventh aspect of the embodiments of the present application provides an information transmitting apparatus, where the information transmitting apparatus includes a processor and a memory, the memory is used to store a program, and the processor calls a program stored in the memory to execute the method provided by the third aspect of the present application.

An eighth aspect of the embodiments of the present application provides an information receiving apparatus, where the information receiving apparatus includes a processor and a memory, the memory is used to store a program, and the processor calls a program stored in the memory to execute the method provided by the fourth aspect of the present application.

A ninth aspect of the embodiments of the present application provides an information transmitting apparatus including at least one processing element (or chip) for performing the method of the above first aspect.

A tenth aspect of the embodiments of the present application provides an information receiving apparatus, including at least one processing element (or chip) for performing the method of the above second aspect.

An eleventh aspect of the present application provides an information transmitting apparatus including at least one processing element (or chip) for performing the method of the above third aspect.

A twelfth aspect of the embodiments of the present application provides an information receiving apparatus comprising at least one processing element (or chip) for performing the method of the above fourth aspect.

A thirteenth aspect of the embodiments of the present application provides a communication system, where the system includes: a network device and a terminal device, where the network device includes at least the information sending device according to the fifth aspect, where the terminal device includes at least The information receiving apparatus according to the sixth aspect, wherein the network device includes at least the information transmitting apparatus according to the seventh aspect, wherein the terminal device includes at least the information receiving apparatus according to the eighth aspect.

A fourteenth aspect of the embodiments of the present application provides a computer readable storage medium having instructions stored therein that, when executed on a computer, cause the computer to perform the method of the first aspect described above.

A fifteenth aspect of the embodiments of the present application provides a computer program product comprising instructions which, when run on a computer, cause the computer to perform the method of the first aspect described above.

A sixteenth aspect of the embodiments of the present application provides a computer readable storage medium having instructions stored therein that, when executed on a computer, cause the computer to perform the method of the second aspect described above.

A seventeenth aspect of the embodiments of the present application provides a computer program product comprising instructions which, when run on a computer, cause the computer to perform the method of the second aspect described above.

The eighteenth aspect of the present application provides a computer readable storage medium having instructions stored therein that, when executed on a computer, cause the computer to perform the method of the above third aspect.

A nineteenth aspect of the embodiments of the present application provides a computer program product comprising instructions which, when run on a computer, cause the computer to perform the method of the third aspect described above.

A twentieth aspect of the embodiments of the present application provides a computer readable storage medium having stored therein instructions that, when run on a computer, cause the computer to perform the method of the fourth aspect described above.

A twenty-first aspect of the embodiments of the present application provides a computer program product comprising instructions, when executed on a computer, causing a computer to perform the method described in the fourth aspect above

In the above aspects, when the network device sends the control channel and the data channel in the same transmission time unit, the network device sends the reference signal on the preset frequency resource on the subsequent modulation symbol of the modulation symbol where the control channel is located, the preset frequency. The resource is a subset of the frequency resources allocated to the target terminal, and the data channel is transmitted on the frequency resource allocated to the target terminal. Accordingly, the target terminal detects the control channel scheduled for the target terminal in the CORESET, and at the same transmission time. When receiving the control channel and the data channel in the unit, the reference signal is received on a preset frequency resource on a subsequent modulation symbol of the modulation symbol where the control channel is located, and the data channel is received on the frequency resource allocated to the target terminal. Or the network device first generates, to indicate whether the data of the target terminal and the reference signal for demodulating the data are transmitted in the CORESET of the control channel, and then sends the indication information to the target terminal through the control channel, correspondingly, the target The terminal receives the indication information through a control channel, and receives a reference signal for demodulating data according to the indication information. In this way, the target terminal can demodulate the data carried on the data channel by using the received reference signal, thereby saving the reference signal separately transmitted on the data channel, improving resource utilization, and improving the URLLC in the case of the same resource allocation. Transmission reliability.

DRAWINGS

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

2 is a schematic diagram showing a distribution of search spaces of terminal 1 and terminal 2 in LTE;

Figure 3 is a schematic diagram showing the relationship between CORESET and search space;

4 is a schematic diagram of a manner in which a DMRS is transmitted on a PDCCH and a PDSCH in the prior art;

FIG. 5 is a schematic diagram of interaction of an information sending and receiving method according to an embodiment of the present disclosure;

FIG. 6 is a schematic diagram of interaction of another method for sending and receiving information according to an embodiment of the present disclosure;

7 is a schematic diagram showing the distribution of the position of the reference signal on the modulation symbol where the control channel is located;

8 is a schematic diagram of distribution of the preset frequency resource and the second frequency resource;

9 is a schematic diagram of distribution of the preset frequency resource;

FIG. 10 is a schematic diagram of interaction of another method for sending and receiving information according to an embodiment of the present disclosure;

FIG. 11 is a schematic diagram of interaction of another method for sending and receiving information according to an embodiment of the present disclosure;

FIG. 12 is a schematic diagram of interaction of another method for sending and receiving information according to an embodiment of the present disclosure;

FIG. 13 is a schematic structural diagram of an information sending apparatus according to an embodiment of the present disclosure;

FIG. 14 is a schematic structural diagram of an information receiving apparatus according to an embodiment of the present application;

FIG. 15 is a schematic structural diagram of another information sending apparatus according to an embodiment of the present disclosure;

FIG. 16 is a schematic structural diagram of another information receiving apparatus according to an embodiment of the present disclosure;

FIG. 17 is a schematic structural diagram of still another information sending apparatus according to an embodiment of the present application;

FIG. 18 is a schematic structural diagram of still another information receiving apparatus according to an embodiment of the present application;

FIG. 19 is a schematic structural diagram of still another information sending apparatus according to an embodiment of the present application;

FIG. 20 is a schematic structural diagram of still another information receiving apparatus according to an embodiment of the present application;

FIG. 21 is a schematic structural diagram of a communication system according to an embodiment of the present application.

detailed description

The information transmitting method provided by the following embodiments of the present application can be applied to a mobile communication system. FIG. 1 is a schematic structural diagram of a mobile communication system according to an embodiment of the present application. As shown in FIG. 1, the mobile communication system may include a core network device 100, a network device 110, and a plurality of terminal devices 120 located within the coverage of the network device 110. FIG. 1 exemplarily shows a core network device 100, a network device 110 and two terminal devices 120. Alternatively, the mobile communication system may include a plurality of core network devices 100, a plurality of network devices 110, and each The number of the core network device 100, the network device 110, and the terminal device 120 included in the mobile communication system is not limited in the coverage of the network device.

As shown in FIG. 1, the terminal device 120 is connected to the network device 110 in a wireless manner, and the network device 110 is connected to the core network device 100 by wireless or wired. In an embodiment, the core network device 100 and the network device 110 may be two separate different physical devices. In another embodiment, the functions of the core network device 100 and the logical functions of the network device 110 may also be integrated on the same physical device. In still another embodiment, only some functions of the core network device 100 and some functions of the network device 110 may be integrated on one physical device. The terminal device 120 can be fixed or mobile.

It can be understood that FIG. 1 is only a schematic diagram, and the mobile communication system may further include other network devices, for example, may also include a wireless relay device and a wireless backhaul device, or may include other networks such as a network controller, a mobility management entity, and the like. The embodiment of the present application is not limited thereto.

Optionally, the mobile communication system applied in the embodiment of the present application may be a global system for mobile communication (GSM) system, a code division multiple access (CDMA) system, and a wideband code division multiple access ( Wideband code division multiple access (WCDMA) system, general packet radio service (GPRS), long term evolution (LTE) system, LTE frequency division duplex (FDD) system, LTE time division A time division duplex (TDD), a universal mobile telecommunication system (UMTS), and other wireless communication systems using orthogonal frequency division multiplexing (OFDM) technology. The system architecture and the service scenario described in the embodiments of the present application are for the purpose of more clearly illustrating the technical solutions of the embodiments of the present application, and do not constitute a limitation of the technical solutions provided by the embodiments of the present application. The technical solutions provided by the embodiments of the present application are equally applicable to similar technical problems.

In the embodiment of the present application, the network device is an access device that the terminal device accesses to the mobile communication system by using a wireless device, and may be used to provide a wireless communication function for the terminal device. The network device may include various forms of macro base stations, micro base stations (also referred to as small stations), relay stations, access points, and the like. The network device may be a base transceiver station (BTS) in GSM or CDMA, or a base station (nodeB, NB) in WCDMA, or an evolved base station (evolutional node B, eNB or e in LTE). -NodeB), and may be a corresponding device gNB in a 5G network, a base station in a future communication system, or an access node in a WiFi system, etc., the embodiments of the present application do not make specific technologies and specific device modes adopted by the network device. limited. For convenience of description, in all embodiments of the present application, the foregoing apparatus for providing a wireless communication function for a terminal device is collectively referred to as a network device.

In the embodiment of the present application, the terminal device may also be referred to as a user equipment (UE), a mobile station (MS), a mobile terminal (MT), a terminal, and the like. The terminal device can communicate with one or more core network devices via a radio access network (RAN), for example, the terminal device can be a mobile phone (or "cellular" phone), a computer with a mobile terminal, etc. For example, the terminal device can also be a portable, pocket, handheld, computer built-in or in-vehicle mobile device that exchanges language and/or data with the wireless access network. Specifically, the terminal device may also be a mobile phone, a tablet, a computer with wireless transceiver function, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, and an industrial device. Wireless terminal in control (industrial control), wireless terminal in self-driving, wireless terminal in remote medical surgery, wireless terminal in smart grid, transportation security Wireless terminal in safety), wireless terminal in smart city, wireless terminal in smart home, and the like. The embodiment of the present application does not specifically limit it.

Alternatively, network devices and terminal devices can be deployed on land, indoors or outdoors, handheld or on-board; they can also be deployed on the water; they can also be deployed on airborne aircraft, balloons, and satellites. The application scenarios of the network device and the terminal device are not limited in the embodiment of the present application.

The embodiments of the present application can be applied to downlink signal transmission, and can also be applied to uplink signal transmission, and can also be applied to device to device (D2D) signal transmission. For downlink signal transmission, the transmitting device is a network device, and the corresponding receiving device is a terminal device. For uplink signal transmission, the transmitting device is a terminal device, and the corresponding receiving device is a network device. For D2D signal transmission, the transmitting device is a terminal device, and the corresponding receiving device is also a terminal device. The embodiment of the present application does not limit the transmission direction of the signal.

The network device and the terminal device and the terminal device and the terminal device can communicate through a licensed spectrum, or can communicate through an unlicensed spectrum, or simultaneously through the licensed spectrum and the unlicensed spectrum. Communication. Communication between the network device and the terminal device and between the terminal device and the terminal device can be performed through a spectrum of 6 gigahertz (GHz) or less, or a spectrum of 6 GHz or higher, or a spectrum below 6 GHz. The spectrum above 6 GHz is communicated. The embodiment of the present application does not limit the spectrum resources used between the network device and the terminal device.

In the embodiment of the present application, "a plurality" means two or more. "and/or", describing the association relationship of the associated objects, indicating that there may be three relationships, for example, A and/or B, which may indicate that there are three cases where A exists separately, A and B exist at the same time, and B exists separately. The character "/" generally indicates that the contextual object is an "or" relationship.

The following is a brief description of the applicable scenarios of the embodiments of the present application.

Mobile communication technology has profoundly changed people's lives, but the pursuit of higher performance mobile communication technology has never stopped. In order to cope with the explosive growth of mobile data traffic in the future, the connection of devices for mass mobile communication, and the emerging new services and application scenarios, the fifth generation (5G) mobile communication system emerged. The international telecommunication union (ITU) defines three types of application scenarios for 5G and future mobile communication systems: enhanced mobile broadband (eMBB), high reliable low latency communication (ultra reliable and low latency). Communications, URLLC) and massive machine type communications (mMTC).

Typical eMBB services include: ultra high definition video, augmented reality (AR), virtual reality (VR), etc. The main features of these services are large amount of transmitted data and high transmission rate. Typical URLLC services include: wireless control in industrial manufacturing or production processes, motion control of driverless cars and drones, and tactile interaction applications such as remote repair and remote surgery. The main features of these services are ultra-reliable. Sex, low latency, less data transfer and burstiness. Typical mMTC services include: smart grid distribution automation, smart city, etc. The main features are huge number of networked devices, small amount of transmitted data, and insensitive data transmission delay. These mMTC terminals need to meet low cost and very long standby. The demand for time.

Different services have different requirements for mobile communication systems. How to better support the data transmission requirements of multiple different services at the same time is a technical problem that the current 5G mobile communication system needs to solve. For example, how to support both URLLC service and eMBB service is one of the discussion hotspots of current 5G mobile communication systems.

The technical solution of the embodiment of the present application is mainly to solve the problem that the transmission reliability of the URLLC service in the URLLC application scenario in the 5G mobile communication system is low. The following is a brief introduction to the related background technology of the URLLC service.

The URLLC service requires extremely high latency. The transmission delay is required to be within 0.5 milliseconds (millisecond, ms) without considering reliability. Under the premise of 99.999% reliability, the transmission delay is required to be within 1 ms. .

In a long term evolution (LTE) system, the smallest time scheduling unit is a transmission time interval (TTI) of 1 ms duration. In order to meet the transmission delay requirement of the URLLC service, the data transmission of the wireless air interface can use a shorter time scheduling unit, for example, using a mini-slot or a larger sub-carrier time slot as the minimum time scheduling. unit. The one mini-slot includes one or more time domain symbols, where the time domain symbols may be orthogonal frequency division multiplexing (OFDM) symbols or FDM symbols. For a time slot with a subcarrier spacing of 15 kilohertz (kilohertz, kHz), including 6 or 7 time domain symbols, the corresponding time length is 0.5 ms; for a time slot with a subcarrier spacing of 60 kHz, the corresponding time The length is shortened to 0.125ms.

In the LTE system, each subframe is 14/12 OFDM symbols (corresponding to a normal CP and an extended CP, respectively), wherein the first 1-4 symbols are used for control channel transmission. CP, the cyclic prefix, is used to eliminate interference between symbols. In order to implement flexible scheduling between terminals, each terminal is allocated a control channel search space, and the terminal needs to blindly detect whether there is a control channel belonging to itself in the control channel search space according to a predetermined rule (for example, a physical downlink control channel (physical downlink) Control channel, PDCCH)).

Optionally, a brief introduction to the control channel search space is given below. Specifically, the search space consists of several factors:

1) Aggregation level: A total of four levels, corresponding to 1/2/4/8, indicating the number of control channel elements (CCEs) that the PDCCH of the terminal may occupy. The CCE is a basic unit of the physical resources of the control channel. Each CCE is composed of 9 resource element groups (REGs), and each REG includes 4 resource elements (RE elements).

2) The number of candidate PDCCHs (PDCCH candidates) in each aggregation level: In order to increase scheduling flexibility and avoid blocking, LTE requires each terminal to blindly detect multiple candidate PDCCHs at each aggregation level. The PDCCH is a control channel that the terminal may occupy.

3) Common and terminal-specific search space: The common search space is mainly used for transmitting PDCCH corresponding to public information such as a broadcast channel (BCH) and a paging channel (PCH), since it is for all terminals in the cell, Therefore, the aggregation level is only 4 and 8. The long aggregation level means that there are many physical resources and the code rate is low, which can be received by all terminals in the cell. The terminal-specific search space is mainly used to transmit the PDCCH corresponding to the terminal-specific data. For the selection of 1/2/4/8, the base station may select a suitable aggregation level and a corresponding candidate PDCCH to schedule the terminal according to multiple factors such as the downlink physical channel quality of the terminal and the number of terminals scheduled in the current subframe. It is worth noting that the public search space and the terminal specific search space can overlap. Optionally, Table 1 is the relationship between the number of candidate PDCCHs monitored by the terminal and the search space. 2 is a schematic diagram showing a distribution of search spaces of terminal 1 and terminal 2 in LTE.

Table 1

Optionally, in the 5th generation mobile communication system, a concept of a control resource set (CORESET) is introduced for the control channel resource, that is, CORESET corresponds to a time-frequency resource, and a CORESET is for a group of terminals. The downlink control channel of the group of terminals is sent on the CORESET; each terminal may have multiple CORESETs, and each terminal has a search space on a CORESET, and the resources of the search space are less than or equal to the resources of the CORESET.

At the 88th meeting of the radio access network, it was stipulated that the multi-control channel resource set of one terminal can overlap in the frequency domain and the time domain; one search space and a single control channel resource in the 5th generation mobile communication system The set correlation is different, and the search spaces on different control channel resource sets are independent of each other; the maximum number of blind detections of one terminal candidate is independent of the number of control channel resource sets and the number of search spaces. Further, the conference also passed the following research: First, for a given set of control channel resources, the mapping rule between CCE and REG is unique; second, for a given search space, CCE and REG The mapping rules between are unique.

Optionally, the following briefly describes the relationship between CORESET, search space, and candidate PDCCH. That is, the PDCCH refers to a physical layer control channel, and CORESET refers to a physical resource that can transmit a PDCCH. The search space means that some resources in the CORESET can be allocated to a specific terminal, and the terminal performs blind detection on the resources occupied by the search space according to a predefined rule. Optionally, FIG. 3 is a schematic diagram of the relationship between CORESET and search space. As shown in Figure 3, the search space of the terminal is a part of the resource of CORESET.

Currently, in the prior art, the control channel part (PDCCH) and the data channel part (PDSCH) respectively transmit their own DMRSs during the transmission of the URLLC service. FIG. 4 is a schematic diagram of a manner in which a DMRS is transmitted on a PDCCH and a PDSCH in the prior art. As shown in FIG. 4, the PDCCH and the PDSCH scheduled to the target terminal in the CORESET respectively transmit respective independent DMRSs. The transmission mode of the DMRS shown in FIG. 4 is suitable for eMBB because the PDCCH in the eMBB requires high reliability, while the data (PDSCH) requires high throughput, and the beamforming direction between the PDCCH and the PDSCH The corresponding DMRS ports may be different. For the transmission of the URLLC service, since both the PDCCH and the PDSCH pursue high reliability, when the PDCCH and the PDSCH respectively transmit the DMRS, the overhead of the DMRS is increased, and in the case where the resources are unchanged, the coding rate of the data needs to be increased. It may reduce the transmission reliability of the URLLC. It should be noted that in the following schematic diagrams in FIG. 4 and in the embodiments of the present application, in one modulation symbol (for example, an OFDM symbol or an FDM symbol), an embedded reference signal (for example, a DMRS signal) and corresponding data are included. Or the control information is multiplexed by means of frequency division multiplexing.

For the above problem, the embodiment of the present application provides a method and an apparatus for sending and receiving information, which is intended to reduce the overhead of the reference signal and improve the transmission reliability of the URLLC service. In the normal case, since the URLLC service is used to occupy a large bandwidth and as few symbols as possible, the control channel and the data channel can multiplex the same reference signal port.

FIG. 5 is a schematic diagram of interaction of an information sending and receiving method according to an embodiment of the present disclosure. As shown in FIG. 5, the method may include the following steps:

Step 51: When the network device sends the control channel and the data channel scheduled to the target terminal in the same transmission time unit, the network device sends a reference on the preset frequency resource on the subsequent modulation symbol of the modulation symbol where the control channel is located. Signal RS.

The preset frequency resource is a subset (eg, a true subset) of frequency resources allocated to the target terminal.

In the embodiment of the present application, the control channel and the data channel that are agreed between the network device and the target terminal for the URLLC service transmission may at least multiplex a set of the same reference signal port, and the reference signal and the control channel corresponding to the group of reference signal ports. The data channel is transmitted on the same layer.

Optionally, the control channel in the embodiment of the present application may be a PDCCH, the data channel may be a PDSCH, and the reference signal port may be a demodulation reference signal DMRS port. Correspondingly, the reference signal is a DMRS. Optionally, the reference signal port may also be a phase tracking reference signals (PT-RS) port, and correspondingly, the reference signal is a PT-RS. Correspondingly, when the PDCCH and the PDSCH are multiplexed with the same DMRS port, the network device sends the DMRS on the preset frequency resource on the subsequent modulation symbol of the modulation symbol where the control channel is located, and the layer where the DMRS port is located is also used for transmitting and multiplexing. The PDCCH of the DMRS port and the PDSCH, which is used to demodulate the control channel and the data channel. When the PDCCH and the PDSCH multiplex the same PT-RS port, the network device sends a PT-RS on the preset frequency resource on the subsequent modulation symbol of the modulation symbol where the control channel is located, and the PT-RS is used to estimate the phase noise. The embodiment of the present application does not limit the specific form of the reference signal port and the reference signal.

In an embodiment of the present application, the transmission time unit is the smallest time scheduling unit including at least one modulation symbol. The transmission time unit may be less than 1 ms, for example, a mini-slot or a time slot having a larger subcarrier spacing may be used as the transmission time unit. Optionally, a certain transmission time unit may include 2 modulation symbols or 3 modulation symbols, or other numbers of modulation symbols, which are not limited in the embodiment of the present application. Optionally, when a transmission time unit includes three modulation symbols, and the control channel and the data channel are sent on the first modulation symbol, only the URLLC data and/or the last two modulation symbols of the transmission time unit are sent. Or pilot.

It should be noted that the modulation signal in the embodiment of the present application may be an Orthogonal Frequency Division Multiplexing (OFDM) symbol or a frequency division multiplexing FDM symbol. The specific expression of the modulation symbol is not limited in this embodiment of the present application.

Optionally, in the embodiment of the present application, the network device may send the DMRS in the target bandwidth only in the OFDM symbol of the PDCCH scheduled to be sent to the target terminal. The target bandwidth described herein is a scheduling bandwidth that is scheduled to the target terminal by using the PDCCH. Specifically, the system bandwidth is greater than or equal to the available bandwidth for the URLLC service transmission, and the available bandwidth for the URLLC service transmission is greater than or equal to the scheduling bandwidth scheduled for the target terminal.

Step 52: The network device sends a data channel on the frequency resource allocated to the target terminal.

In the embodiment of the present application, when the network device sends the control channel and the data channel to the target terminal in the same transmission time unit, the network device may, according to the agreement with the target terminal, only advance on the subsequent modulation symbol of the modulation symbol where the control channel is located. The reference signal is transmitted on the frequency resource, and the data channel is transmitted on the allocated frequency resource according to the frequency resource allocated to the target terminal. It is worth noting that the preset frequency resource for transmitting the reference signal is only a part of the frequency resource allocated to the target terminal.

Step 53: When the target terminal detects a control channel scheduled for the target terminal in the CORESET, and receives the control channel and the data channel in the same transmission time unit, the target terminal is in the modulation symbol where the control channel is located. The reference signal RS is received on a preset frequency resource on a subsequent modulation symbol.

Optionally, the control channel and the data channel that are agreed between the network device and the target terminal for the URLLC service transmission can multiplex at least one set of the same reference signal port, that is, in the embodiment of the present application, the target terminal knows that the network device knows the control. The channel and data channels share the same reference signal port. Therefore, in the embodiment of the present application, the target terminal first performs detection in the CORESET. When the target terminal detects the control channel scheduled for the target terminal, and can receive the control channel and the data channel in the same transmission time unit, the target terminal The reference signal and the data channel transmitted by the network device may be received in a receiving manner corresponding to the network device transmitting the reference signal.

In this step, when the network device sends the reference signal on the preset frequency resource on the subsequent modulation symbol of the modulation symbol where the control channel is located, correspondingly, the target terminal may be on the subsequent modulation symbol of the modulation symbol where the control channel is located. The reference signal is received on a preset frequency resource.

Optionally, in the embodiment of the present application, the preset frequency resource is a subset of the frequency resource allocated by the network device to the target terminal, that is, the preset frequency resource is a part of the frequency resource allocated to the target terminal.

Optionally, in the embodiment of the present application, the specific format of the transmission time unit, the control channel, the data channel, the modulation signal, and the reference signal may be referred to in the foregoing step 51, and details are not described herein again.

Step 54: The target terminal receives the data channel on the frequency resource allocated to the target terminal.

Optionally, when the network device sends the data channel on the frequency resource allocated to the target terminal, correspondingly, the target terminal needs to receive on the allocated frequency resource. Specifically, the target terminal may demodulate data carried on the data channel by using the reference signal received on the preset frequency resource.

After the target terminal successfully acquires the data sent by the network device, downlink transmission is implemented between the network device and the target terminal. The uplink transmission scheme between the network device and the target terminal is similar, and details are not described herein again.

It should be noted that, in this embodiment of the present application, the sequence of execution of step 53 and step 54 is not limited, and the target terminal may simultaneously receive the reference signal and the data channel sent by the network device, and then demodulate the data channel by using the received reference signal. The data carried.

In the information sending method provided by the embodiment of the present application, when the network device sends the control channel and the data channel in the same transmission time unit, the network device sends the reference signal on the preset frequency resource on the subsequent modulation symbol of the modulation symbol where the control channel is located, The preset frequency resource is a subset of the frequency resources allocated to the target terminal, and the data channel is transmitted on the frequency resource allocated to the target terminal. Accordingly, the target terminal detects the control channel scheduled for the target terminal in the CORESET, and Receiving the control channel and the data channel in the same transmission time unit, the target terminal receives the reference signal RS on the preset frequency resource on the subsequent modulation symbol of the modulation symbol where the control channel is located, and receives the reference signal on the frequency resource allocated to the target terminal. Data channel. In this way, the target terminal can demodulate the data carried on the data channel by using the received reference signal, thereby saving the reference signal separately transmitted on the data channel, improving resource utilization, and improving the URLLC in the case of the same resource allocation. Transmission reliability.

Optionally, on the basis of the foregoing embodiment, FIG. 6 is a schematic diagram of interaction of another method for sending and receiving information according to an embodiment of the present application. As shown in FIG. 6, in the embodiment of the present application, the information sending and receiving method may further include the following steps:

Step 61: The network device sends a reference signal on a first frequency resource in a modulation symbol where the control channel is located.

The first frequency resource is a part other than the frequency resource occupied by the control channel resource set CORESET in the frequency resource allocated to the target terminal.

For example, FIG. 7 is a schematic diagram showing the distribution of the position of the reference signal on the modulation symbol where the control channel is located. As shown in FIG. 7, FIG. 7 shows that the transmission time unit includes two modulation symbols, and the network device transmits a control channel PDCCH on the first modulation symbol of the transmission time unit, the PDCCH being located at a frequency allocated to the target terminal. The portion of the frequency resource occupied by CORESET in the resource.

In addition, as shown in FIG. 7 , if part of the resource elements of the PDSCH are scheduled to be simultaneously scheduled in the modulation symbol in which the PDCCH is located, the DMRS is also transmitted in the frequency portion occupied by the PDSCH. In this embodiment, the frequency occupied by the PDSCH is used. The part is the first frequency resource, so the network device can also send the reference signal DMRS for demodulating data on the first frequency resource within the modulation symbol in which the control channel PDCCH is located. As shown in FIG. 7, the first frequency resource is a portion of the frequency resource allocated to the target terminal other than the frequency resource occupied by the CORESET.

It should be noted that, in the schematic diagram shown in FIG. 7, the PDSCH and PDCCH scheduled to the target terminal may multiplex the same DMRS on the DMRS port.

Step 62: The target terminal receives the reference signal on the first frequency resource in the modulation symbol where the control channel is located.

Optionally, refer to the distribution diagram of the reference signal shown in FIG. 7 above. When the network device sends the reference signal on the first frequency resource in the modulation symbol where the control channel is located, the target terminal may receive the reference signal on the first frequency resource in the modulation symbol where the control channel is located. For the location of the first frequency resource and the distribution of the reference signal, refer to the introduction in FIG. 7, and details are not described herein again.

Further, as shown in FIG. 6, the information sending and receiving method may further include the following steps:

Step 63: The network device sends a reference signal on a second frequency resource in a modulation symbol where the control channel is located.

The second frequency resource is a frequency resource occupied by the control channel.

Optionally, referring to FIG. 7 above, the network device sends a control channel PDCCH on a first modulation symbol of the transmission time unit, where the PDCCH is located in a frequency resource part occupied by a CORESET in a frequency resource allocated to the target terminal. In this embodiment, the frequency resource occupied by the PDCCH is defined as the second frequency resource. Therefore, as shown in FIG. 7, the network device may further send the reference signal DMRS on the frequency resource occupied by the PDCCH in the modulation symbol where the PDCCH is located.

Step 64: The target terminal receives the reference signal on a second frequency resource in a modulation symbol where the control channel is located.

Optionally, the manner in which the target terminal receives the reference signal corresponds to the manner in which the network device sends the reference signal. As shown in FIG. 7, when the network device sends the reference signal on the second frequency resource in the modulation symbol where the control channel is located, Correspondingly, the target terminal receives the reference signal on a second frequency resource within a modulation symbol in which the control channel is located. Optionally, the second frequency resource in this embodiment is a frequency resource occupied by the control channel.

It should be noted that the embodiment of the present application does not limit the sequence of execution of step 61 and step 63, step 62, and step 64. If the network device sends a reference signal on the first frequency resource and the second frequency resource, then the modulation is performed. The first frequency resource of the symbol and the second frequency resource are simultaneously transmitted, and correspondingly, the target terminal receives at the corresponding location.

Optionally, in order to save the occupied resources of the reference signal, in an embodiment of the present application, the frequency resource range of the reference signal may be sent on a subsequent modulation symbol of the modulation symbol where the control channel is located, that is, on the modulation symbol where the control channel is located. The reference signal is not repeatedly transmitted within. That is, the preset frequency resource and the second frequency resource do not intersect, and the union of the preset frequency resource and the second frequency resource is a frequency resource occupied by the CORESET.

In an embodiment of the present application, FIG. 8 is a schematic diagram of distribution of the preset frequency resource and the second frequency resource. As shown in FIG. 8, the second frequency resource is a frequency resource occupied by the control channel in the frequency resource occupied by the CORESET. When the network device sends the reference signal on the second frequency resource, in order to save the transmission of the reference signal, the control channel is located. The resource (frequency resource) region corresponding to the second frequency resource on the subsequent modulation symbol of the modulation symbol may not need to transmit the reference signal, but needs to send a reference to the resource region corresponding to the resource region other than the second frequency resource in the CORESET The signal, therefore, the preset frequency resource and the second frequency resource do not intersect, but the combination of the preset frequency resource and the second frequency resource is a frequency resource occupied by the CORESET.

Specifically, when the control channel is a PDCCH and the modulation symbol is an OFDM symbol, when the network device has transmitted the reference signal in the second frequency resource of the OFDM symbol where the PDCCH is located, the network device is on a subsequent OFDM symbol of the OFDM symbol where the PDCCH is located, And the DMRS is not required to be repeatedly transmitted in the frequency resource that overlaps with the second frequency resource, but only the subsequent OFDM symbols of the OFDM symbol where the PDCCH is located, and the DMRS is sent in a frequency domain range other than the second frequency resource. This can save more frequency resources occupied by the DMRS, but the process of determining the frequency range in which the reference signal is not transmitted in the resources occupied by the CORESET is more complicated.

Optionally, the preset frequency resource and the second frequency resource have no intersection, and the union of the preset frequency resource and the second frequency resource is based on the frequency resource occupied by the CORESET, and the foregoing step 54 After the target terminal receives the data channel on the frequency resource allocated to the target terminal, the method may further include the following steps:

The target terminal demodulates data carried by the data channel according to the reference signal received on the preset frequency resource, the reference signal received on the first frequency resource, and the reference signal received on the second frequency resource.

In the embodiment of the present application, when the target terminal receives the reference signal from the preset frequency resource on the subsequent modulation symbol of the modulation symbol where the control channel is located, receives the reference signal from the first frequency resource in the modulation symbol where the control channel is located, and When receiving the reference signal on the second frequency resource in the modulation symbol where the control channel is located, the target terminal may receive the reference signal according to the preset frequency resource, the first frequency resource, and the second frequency resource. And demodulating data carried by the data channel, thereby acquiring data information sent by the network device to the target terminal.

In the embodiment of the present application, the target terminal may demodulate data carried on the data channel according to the reference signal received on the preset frequency resource, on the first frequency resource, and on the second frequency resource, thereby effectively saving the reference signal. Overhead, improve the efficiency of resource use.

Optionally, in the foregoing embodiment shown in FIG. 6 , in order to reduce the complexity of determining the frequency range of the reference signal that is not used in the resource occupied by the CORESET, the pre-prediction in the foregoing embodiment is used. Let the frequency resource be the frequency resource occupied by the CORESET.

Specifically, FIG. 9 is a schematic diagram of distribution of the preset frequency resource. As shown in FIG. 9, CORESET is a control channel resource set on a modulation symbol where a control channel is located. Since the modulation symbol on the control channel is in the area except the frequency resource occupied by the CORESET, other frequency resources are used to transmit the data channel, because the data is transmitted. The reference signal is sent on the frequency resource of the channel. Therefore, the embodiment of the present application sends the reference signal only in the frequency resource overlapping with the frequency resource occupied by the CORESET on the subsequent modulation symbol of the modulation symbol where the control channel is located. The preset frequency resource in the embodiment may be a frequency resource occupied by the CORESET.

In this way, on the basis of saving the transmission of the reference signal, the process of determining the transmission position is simplified, and it is easier to implement.

Optionally, the preset frequency resource may be the frequency resource occupied by the CORESET, and after the step 54 (the target terminal receives the data channel on the frequency resource allocated to the target terminal), the method may further include the following steps. :

The target terminal demodulates data carried by the data channel according to the reference signal received on the preset frequency resource and the reference signal received on the first frequency resource.

In the embodiment of the present application, when the target terminal receives the reference signal from the preset frequency resource on the subsequent modulation symbol of the modulation symbol where the control channel is located, and receives the reference signal from the first frequency resource in the modulation symbol where the control channel is located, The target terminal may demodulate data carried by the data channel according to the reference signal received on the first frequency resource on the preset frequency resource, and acquire data information sent by the network device to the target terminal.

Optionally, in any of the foregoing embodiments of the present application, the unit of the frequency resource is a resource block RB.

In the embodiment of the present application, when the communication system adopts the OFDM technology, the minimum resource unit used for data transmission is a resource element (RE), which corresponds to 1 OFDM symbol in the time domain and 1 in the frequency domain. Subcarriers. On the basis of the resource particle RE, a resource block (RB) is composed of 14 or 7 consecutive OFDM symbols in the time domain and consecutive subcarriers in the frequency domain (for example, 12 subcarriers), and the RB is a resource. The basic unit of scheduling. The frequency resource described above in the embodiment of the present application refers to the resource block RB.

FIG. 10 is a schematic diagram of interaction of another method for sending and receiving information according to an embodiment of the present disclosure. As shown in FIG. 10, the method may include the following steps:

Step 101: The network device generates indication information for indicating whether to transmit data of the target terminal and a reference signal for demodulating data in the CORESET of the control channel.

In an embodiment of the present application, the network device may use the indication information carried in the control channel to indicate whether data of the target terminal and the reference signal for demodulating data are transmitted in the CORESET of the control channel. Optionally, the network device generates an indication information, where the indication information may be carried in downlink control information (DCI) in the modulation symbol of the control channel. Optionally, using the 1 bit display in the DCI to indicate whether the data of the target terminal and the reference signal for demodulating the data need to be transmitted on the subsequent modulation symbols of the modulation symbol where the control channel is located.

Optionally, when the control channel is a PDCCH, the data channel is a PDSCH, the modulation signal is an OFDM symbol, and the reference signal is a DMRS, the indication information in the DCI is used to indicate whether the DMRS is to be supplemented on the subsequent OFDM symbol.

As an example, when the indication information indicates that the data of the target terminal and the reference signal for demodulating data are sent in the CORESET, the network device sends the data of the target terminal and the data in the CORESET. A reference signal for demodulating data. In an example, the network device transmits data of the target terminal and a reference signal for demodulating data on resources other than resources allocated to the PDCCH of the target terminal within the COREST.

As another example, when the indication information indicates that the data of the target terminal and the reference signal for demodulating data are not transmitted in the CORESET, then the network device does not send the target terminal in the CORESET. Data and reference signals used to demodulate data. In this case, the specific manners of the network device transmitting the data of the target terminal and the reference signal for demodulating the data can be referred to the description in the embodiment shown in FIG. 11 below, and details are not described herein again.

Step 102: The network device sends the indication information to the target terminal by using a control channel.

In the embodiment of the present application, the network device may carry the foregoing indication information in a control channel, and send the indication information to the target terminal by using a control channel. The manner of transmitting the control channel belongs to the prior art, and details are not described herein again.

Step 103: The target terminal receives the indication information by using a control channel.

It is worth noting that the terminal in this step is the target terminal in the above steps. Therefore, after the network device sends the indication information through the control channel, the target terminal receives the indication information correspondingly on the control channel. Since the indication information is used to indicate whether data of the target terminal and a reference signal for demodulating data are transmitted in the CORESET, the target terminal can determine the next operation according to the received indication information.

Step 104: The target terminal receives a reference signal for demodulating data according to the indication information.

In the embodiment of the present application, after receiving the indication information from the control channel, the target terminal analyzes the content in the indication information, and receives the data for demodulating on the control channel and/or the data channel according to the content indicated by the indication information. Reference signal.

As an example, when the indication information indicates the data of the target terminal and the reference signal for demodulating the data in the CORESET of the control channel, the target terminal receives the data of the target terminal and the demodulation in the CORESET. The reference signal of the data so that the received reference signal can be used to demodulate data carried on the data channel.

As another example, when the indication information indicates that the data of the target terminal and the reference signal for demodulating data are not transmitted in the CORESET, the target terminal does not receive the target terminal from the frequency resource occupied by the CORESET. The data and the reference signal used to demodulate the data. In this case, the receiving mode of the target terminal corresponds to the sending mode of the network device. For details, refer to the description in the embodiment shown in FIG. 11 below, and details are not described herein again.

Optionally, in the embodiment of the present application, after the target terminal detects the control channel sent to the target terminal in the CORESET, the target terminal transmits the control channel and data in the same transmission time unit. The same reference signal port is multiplexed in the channel.

In the method for transmitting and receiving information provided by the embodiment of the present application, the network device first generates, by using a control channel, information indicating whether to transmit the target terminal in the CORESET of the control channel and the reference signal for demodulating the data. The indication information is sent to the target terminal. Correspondingly, the target terminal receives the indication information through the control channel, and receives a reference signal for demodulating data according to the indication information. The technical solution of the present application determines the sending position of the reference signal according to the indication information carried in the control channel, reduces the overhead of the reference signal, improves the utilization efficiency of the system resources, and improves the reliability of the URLLC service transmission.

Optionally, on the basis of the foregoing embodiment, the method for sending and receiving information provided by the embodiment of the present application may further include the following steps:

The network device transmits the reference signal on a first frequency resource within a modulation symbol in which the control channel is located.

The first frequency resource is a portion other than the frequency resource occupied by the CORESET in the frequency resource allocated to the target terminal.

As an example, when the indication information indicates that the data of the target terminal and the reference signal for demodulating data are sent in the CORESET, the network device may also be at a first frequency within a modulation symbol where the control channel is located. A reference signal is sent on the resource. For example, after the control channel of the target terminal is transmitted on the frequency resource occupied by the CORESET, the reference signal may be sent in a part of the frequency resource allocated to the target terminal other than the frequency resource occupied by the CORESET.

For the location of the first frequency resource and the distribution of the reference signal, reference may be made to the description in step 61 of the embodiment shown in FIG. 6 and to the description of FIG. 7, and details are not described herein again.

Correspondingly, the target terminal receives the reference signal on a first frequency resource within a modulation symbol in which the control channel is located.

When the network device sends the reference signal on the first frequency resource in the modulation symbol where the control channel is located, the target terminal may receive the reference signal on the first frequency resource in the modulation symbol where the control channel is located. For the specific implementation, refer to the description of step 62 in the embodiment shown in FIG. 6 above, and details are not described herein again.

Further, on the basis of the foregoing embodiment, the method for sending and receiving information provided by the embodiment of the present application may further include the following steps:

The target terminal demodulates the received data based on the reference signal received within the CORESET and the reference signal received on the first frequency resource.

In the embodiment of the present application, when the indication information indicates that the data of the target terminal and the reference signal for demodulating data are sent in the CORESET, the target terminal may also receive data of the target terminal and use the data in the CORESET. The reference signal of the data is demodulated, so the target terminal can jointly demodulate the received data based on the reference signal received within the CORESET and the reference signal received on the first frequency resource.

In other embodiments of the present application, FIG. 11 is a schematic diagram of interaction of another method for sending and receiving information according to an embodiment of the present application. As shown in FIG. 11, in the embodiment of the present application, the information sending and receiving method may further include the following steps:

Step 111: When the indication information indicates that the data of the target terminal and the reference signal for demodulating data are not sent in the CORESET, and the network device sends the control channel scheduled to the target terminal in the same transmission time unit. And the data channel, the network device transmitting the reference signal on a preset frequency resource on a subsequent modulation symbol of the modulation symbol where the control channel is located.

The preset frequency resource is a subset of frequency resources allocated to the target terminal.

Specifically, in the application embodiment, the generated indication information indicates that the data of the target terminal and the reference signal for demodulating the data are not transmitted in the CORESET, and the network device sends the scheduling to the target terminal in the same transmission time unit. At the time of the control channel and the data channel, the network device needs to re-issue the reference signal on the subsequent modulation symbol of the modulation symbol where the control channel is located, that is, the pre-modulation of the network device on the subsequent modulation symbol of the modulation symbol where the control channel is located. The reference frequency signal is sent on the frequency resource, and the preset frequency resource is a subset of the frequency resources allocated to the target terminal.

Step 112: The network device sends the data channel on the frequency resource allocated to the target terminal.

Correspondingly, in this embodiment, the manner in which the network device sends the data channel is similar to that in the embodiment shown in FIG. 5 . For details, refer to the description in step 52, and details are not described herein again.

Correspondingly, the foregoing step 104 (the target terminal receives the reference signal for demodulating data according to the indication information) may include the following steps 113 and 114.

Step 113: When the indication information indicates that the data of the target terminal and a reference signal for demodulating data are not sent in the CORESET, and the target terminal receives scheduling to the target terminal in the same transmission time unit. In the control channel and the data channel, the target terminal receives the reference signal on a preset frequency resource on a subsequent modulation symbol of the modulation symbol where the control channel is located.

Specifically, the preset frequency resource may be a target bandwidth of the URLLC on the subsequent modulation symbol of the modulation symbol where the control channel is located, or may be a frequency domain resource part overlapping with the CORESET, or may be a transmission control in the frequency domain resource where the CORESET is located. The remaining frequency domain resources of the channel.

Step 114: The target terminal receives the data channel on the frequency resource allocated to the target terminal.

The specific implementations of the step 113 and the step 114 are similar to those in the step 53 and the step 54 in the embodiment shown in FIG. 5 . For details, refer to the descriptions in the foregoing steps 53 and 54 , and details are not described herein again.

For specific implementations and advantages of the embodiments of the present application, refer to the description in the foregoing embodiment shown in FIG. 5, and details are not described herein again.

Optionally, in the foregoing embodiment of the present application, when the indication information indicates that the data of the target terminal and the reference signal for demodulating data are not sent in the CORESET, the network device may also be in the control. And transmitting, by the first frequency resource in the modulation symbol where the channel is located, the reference signal, where the first frequency resource is a portion other than the frequency resource occupied by the CORESET in the frequency resource allocated to the target terminal. Correspondingly, the target terminal may receive the reference signal on a first frequency resource within a modulation symbol in which the control channel is located.

Further, the network device may further send the reference signal on a second frequency resource in a modulation symbol where the control channel is located, where the second frequency resource is a frequency resource occupied by the control channel.

Correspondingly, the target terminal receives the reference signal on a second frequency resource in a modulation symbol where the control channel is located, where the second frequency resource is a frequency resource occupied by the control channel.

For the location of the second frequency resource and the distribution of the reference signal, reference may be made to the descriptions in steps 63 and 64 of the embodiment shown in FIG. 6 and to the description of FIG. 7, and details are not described herein again.

Optionally, in an embodiment, the preset frequency resource and the second frequency resource do not intersect, and the union of the preset frequency resource and the second frequency resource is a frequency resource occupied by the CORESET.

Correspondingly, in the embodiment of the present application, the method for sending and receiving information provided by the present application further includes:

The target terminal demodulates data carried by the data channel according to the reference signal received on the preset frequency resource, the signal received on the first frequency resource, and the reference signal received on the second frequency resource.

Receiving, by the target terminal, a reference signal from a preset frequency resource on a subsequent modulation symbol of a modulation symbol where the control channel is located, receiving a reference signal from a first frequency resource in a modulation symbol in which the control channel is located, and a modulation symbol from a control channel When receiving the reference signal on the second frequency resource, the target terminal may demodulate the data channel according to the reference signal received on the preset frequency resource, on the first frequency resource, and on the second frequency resource. The data carried, and then the data information sent by the network device to the target terminal is obtained.

Optionally, in another embodiment, the preset frequency resource is a frequency resource occupied by the CORESET.

The target terminal demodulates data carried by the data channel according to a reference signal received on the preset frequency resource and a signal received on the first frequency resource.

When the target terminal receives the reference signal from the preset frequency resource on the subsequent modulation symbol of the modulation symbol where the control channel is located and receives the reference signal from the first frequency resource in the modulation symbol where the control channel is located, the target terminal may Deriving a reference signal received on the first frequency resource on the preset frequency resource to demodulate data carried by the data channel, and acquiring data information sent by the network device to the target terminal.

Optionally, the unit of the frequency resource is a resource block RB.

FIG. 12 is a schematic diagram of interaction of another method for sending and receiving information according to an embodiment of the present disclosure. As shown in FIG. 12, the method may include the following steps:

Step 121: The network device generates, by using the resource occupied by the CORESET of the control channel, whether there is multiple terminal multiplexing indication information.

In an embodiment of the present application, as an example, it may be assumed that the frequency division multiplexing of multiple URLLC terminals is not allowed on the available bandwidth of the URLLC, and the resources occupied by the control channel are not used on the OFDM symbol of the control channel PDCCH. Transmitting URLLC data and/or pilots of the UE scheduled by the PDCCH.

As another example, in the embodiment of the present application, the network device may use the indication information carried in the control channel to indicate whether the resource occupied by the CORESET of the control channel of the target terminal has other terminal multiplexing. Optionally, the network device first generates an indication information, where the indication information may be located in downlink control information (DCI) of the control channel. Optionally, the 1 bit display in the DCI is used to indicate whether the resources occupied by the CORESET are multiplexed by other terminals.

Optionally, when the control channel is a PDCCH, the data channel is a PDSCH, and the modulation signal is an OFDM symbol, and the indication information in the DCI is used to indicate whether a control channel of another terminal is sent on a modulation symbol of the control channel of the target terminal.

In an embodiment of the present application, when resources of the CORESET of the target terminal control channel are multiplexed between the plurality of terminals, and the indication information indicates that the control channel of the control channel of the target terminal is transmitted by the control channel of another terminal, And the network device cannot transmit the URLLC data and/or the pilot of the target terminal on the resources other than the control channel in the CORESET.

In another embodiment of the present application, resources occupied by the CORESET of the control channel are multiplexed between the plurality of terminals, but the indication information indicates that the control channel of the target terminal is not transmitted by the control channel of the other terminal. The network device may transmit the URLLC data and/or the pilot of the target terminal on the resources other than the PDCCH in the CORESET.

Step 122: The network device sends the indication information to the target terminal by using a control channel.

In the embodiment of the present application, the network device may carry the foregoing indication information in a control channel, and send the indication information to the target terminal by using a control channel.

Step 123: The target terminal receives the indication information through the control channel.

After the network device sends the indication information through the control channel, the target terminal receives the indication information correspondingly on the control channel. Because the indication information is used to indicate whether there is multiple terminal multiplexing indication information on the resource occupied by the CORESET of the target terminal, the target terminal may determine the next operation according to the received indication information.

Step 124: The target terminal receives information transmitted by the network device on other resources outside the control channel in the CORESET according to the foregoing indication information.

In the embodiment of the present application, after receiving the indication information from the control channel, the target terminal analyzes the content in the indication information, and receives the information transmitted by the network device on other resources outside the control channel in the CORESET according to the content indicated by the indication information. .

As an example, when the indication information indicates that the control channel of the control terminal of the target terminal is transmitted by the control channel of another terminal, that is, the network device cannot transmit the target terminal on other resources except the control channel in the CORESET. URLLC data and/or pilots, ie, the target terminal may receive URLLC data and/or pilots of other terminals from resources other than the control channel within the CORESET.

Correspondingly, when the indication information indicates that the control channel of the target terminal is not transmitted by the control channel of the other terminal, the target terminal may receive the target terminal from other resources except the control channel in the CORESET. URLLC data and/or pilots.

It is worth noting that the receiving mode of the target terminal is similar to that of the network device, and is not described here.

The method for transmitting and receiving information provided by the embodiment of the present application, the network device generates, by using the control channel, the indication information to be sent to the device by using the control channel to generate indication information indicating whether multiple terminals are multiplexed on the resource occupied by the CORESET of the control channel. The target terminal further receives the indication information through the control channel, and receives the information transmitted by the network device on other resources outside the control channel in the CORESET according to the indication information. In the technical solution, if the indication information indicates whether there is other terminal multiplexing on the resource occupied by the CORESET of the control channel, the utilization efficiency of the frequency resource is improved.

FIG. 13 is a schematic structural diagram of an information sending apparatus according to an embodiment of the present disclosure. The device can be integrated into the aforementioned network device. Referring to FIG. 13, the information transmitting apparatus includes: a processing module 131 and a transmitting module 132.

The processing module 131 is configured to determine to send a control channel and a data channel scheduled to the target terminal in the same transmission time unit.

The sending module 132 is configured to send a reference signal RS on a preset frequency resource on a subsequent modulation symbol of the modulation symbol where the control channel is located, and send the data channel on the frequency resource allocated to the target terminal. .

In an embodiment of the present application, the preset frequency resource is a subset of frequency resources allocated to the target terminal.

Optionally, in some embodiments of the present application, the sending module 132 is further configured to send the reference signal on a first frequency resource within a modulation symbol in which the control channel is located.

Optionally, in another embodiment of the present application, the sending module 132 is further configured to send the reference signal on a second frequency resource in a modulation symbol where the control channel is located.

Optionally, in some the foregoing embodiments of the present application, the preset frequency resource and the second frequency resource do not intersect, and the union of the preset frequency resource and the second frequency resource is the CORESET The frequency resource occupied.

Optionally, in the foregoing other embodiments of the present application, the preset frequency resource is a frequency resource occupied by the CORESET.

The information sending apparatus provided by the embodiment of the present application may be used to perform the technical solution of the network device in the foregoing embodiment of the information transmitting and receiving method shown in FIG. 5 and FIG. 6. The implementation principle and the beneficial effects are similar, and details are not described herein again.

FIG. 14 is a schematic structural diagram of an information receiving apparatus according to an embodiment of the present disclosure, where the apparatus may be integrated into the foregoing terminal. As shown in FIG. 14, the information receiving apparatus includes a processing module 141 and a receiving module 142.

The processing module 141 is configured to determine that a control channel scheduled for the terminal is detected in the control channel resource set CORESET, and the control channel and the data channel are received in the same transmission time unit.

The receiving module 142 is configured to receive a reference signal RS on a preset frequency resource on a subsequent modulation symbol of the modulation symbol where the control channel is located, and receive the data channel on the frequency resource allocated to the terminal.

In this embodiment, the preset frequency resource is a subset of frequency resources allocated to the terminal.

Optionally, in some embodiments of the present application, the receiving module 142 is further configured to receive the reference signal on a first frequency resource within a modulation symbol in which the control channel is located.

The first frequency resource is a part other than the frequency resource occupied by the CORESET in the frequency resource allocated to the terminal.

Optionally, in other embodiments of the present application, the receiving module 142 is further configured to receive the reference signal on a second frequency resource within a modulation symbol in which the control channel is located.

Correspondingly, in the foregoing embodiment of the present application, the processing module 141 is further configured to: after the receiving module 142 receives the data channel on the frequency resource allocated to the terminal, according to the And demodulating data carried by the data channel by using a reference signal received on the preset frequency resource, a reference signal received on the first frequency resource, and a reference signal received on the second frequency resource.

Correspondingly, in the foregoing embodiment of the present application, the processing module 141 is further configured to: after the receiving module 142 receives the data channel on the frequency resource allocated to the terminal, according to the And demodulating data carried by the data channel by using a reference signal received on the preset frequency resource and a reference signal received on the first frequency resource.

The information receiving apparatus provided by the embodiment of the present application may be used to perform the technical solution of the target terminal in the embodiment of the information transmitting and receiving method shown in FIG. 5 and FIG. 6 , and the implementation principle and the beneficial effects are similar, and details are not described herein again.

FIG. 15 is a schematic structural diagram of another information sending apparatus according to an embodiment of the present disclosure. The device can be integrated into the aforementioned network device. Referring to FIG. 15, the information transmitting apparatus includes a processing module 151 and a transmitting module 152.

The processing module 151 is configured to generate, according to the data of the control channel resource set CORESET of the control channel, whether to transmit the target terminal and the reference signal for demodulating the data.

The sending module 152 is configured to send the indication information to the target terminal by using the control channel.

Optionally, in some embodiments of the present application, the processing module 151 is further configured to determine that the indication information indicates data for transmitting the target terminal in the CORESET and a reference signal for demodulating data.

Correspondingly, the sending module 152 is further configured to send data of the target terminal and a reference signal for demodulating data in the CORESET.

Optionally, in the foregoing embodiment of the present application, the sending module 152 is further configured to send the reference signal on a first frequency resource in a modulation symbol where the control channel is located.

The first frequency resource is a part other than the frequency resource occupied by the CORESET in the frequency resource allocated to the target terminal.

Optionally, in another embodiment of the present application, the processing module 151 is further configured to determine that the indication information indicates that data of the target terminal is not sent in the CORESET, and a reference signal used for demodulating data, and The control channel and data channel scheduled for the target terminal are transmitted within the same transmission time unit.

Correspondingly, the sending module 152 is further configured to: send a reference signal RS on a preset frequency resource on a subsequent modulation symbol of the modulation symbol where the control channel is located, and send the reference signal on the frequency resource allocated to the target terminal. The data channel.

Optionally, in the foregoing embodiment of the present application, the sending module 152 is further configured to send the reference signal on a second frequency resource in a modulation symbol where the control channel is located.

Optionally, in some the foregoing embodiments of the present application, the preset frequency resource and the second frequency resource do not intersect, and the union of the preset frequency resource and the second frequency resource is a frequency occupied by the CORESET. Resources.

The information sending apparatus provided by the embodiment of the present application may be used to perform the technical solution of the network device in the foregoing embodiment of the information transmitting and receiving method shown in FIG. 10 and FIG. 11 , and the implementation principle and the beneficial effects are similar, and details are not described herein again.

FIG. 16 is a schematic structural diagram of another information receiving apparatus according to an embodiment of the present application. The device can be integrated into the aforementioned target terminal. Referring to FIG. 16, the information receiving apparatus includes a receiving module 161 and a processing module 162.

The receiving module 161 is configured to receive indication information by using a control channel, where the indication information is used to indicate whether data of the terminal and a reference signal for demodulating data are sent in the CORESET.

The processing module 162 is configured to receive a reference signal for demodulating data according to the indication information.

Optionally, in some embodiments of the present application, the processing module 162 is specifically configured to determine that the indication information indicates data for transmitting the terminal in the CORESET and a reference signal for demodulating data.

Correspondingly, the receiving module 161 is specifically configured to receive data of the terminal and a reference signal for demodulating data in the CORESET.

Optionally, in some embodiments of the present application, the receiving module 161 is further configured to receive the reference signal on a first frequency resource within a modulation symbol in which the control channel is located.

Correspondingly, in the foregoing embodiment of the present application, the processing module 162 is further configured to demodulate the received according to the reference signal received in the CORESET and the reference signal received on the first frequency resource. data.

Optionally, in other embodiments of the present application, the processing module 162 is specifically configured to determine that the indication information indicates that the data of the terminal and the reference signal for demodulating data are not sent in the CORESET.

Correspondingly, the receiving module 161 is not used to receive data of the terminal and a reference signal for demodulating data in the CORESET.

Optionally, in the foregoing embodiment of the present application, the processing module 162 is further configured to: after detecting the control channel sent to the terminal in the CORESET, determine to transmit the control in the same transmission time unit. The same reference signal port is multiplexed for both the channel and the data channel.

Optionally, in some embodiments of the present application, the processing module 162 is specifically configured to determine that the indication information indicates that the data of the terminal and the reference signal for demodulating data are not sent in the CORESET, And receiving the control channel and the data channel scheduled to the terminal within the same transmission time unit.

Correspondingly, the receiving module 161 is configured to receive a reference signal RS on a preset frequency resource on a subsequent modulation symbol of the modulation symbol where the control channel is located, and receive the reference signal on the frequency resource allocated to the terminal. The data channel.

The preset frequency resource is a subset of frequency resources allocated to the terminal.

Optionally, in the foregoing embodiment of the present application, the receiving module 161 is further configured to receive the reference signal on a first frequency resource in a modulation symbol where the control channel is located.

Optionally, in the foregoing embodiment of the present application, the receiving module 161 is further configured to receive the reference signal on a second frequency resource in a modulation symbol where the control channel is located.

Correspondingly, the processing module 162 is further configured to demodulate according to the reference signal received on the preset frequency resource, the signal received on the first frequency resource, and the reference signal received on the second frequency resource. The data carried by the data channel.

Correspondingly, the processing module 162 is further configured to demodulate data carried by the data channel according to the reference signal received on the preset frequency resource and the signal received on the first frequency resource.

Optionally, in any embodiment of the present application, the unit of the frequency resource is a resource block RB.

The information receiving apparatus provided by the embodiment of the present application may be used to perform the technical solution of the target terminal in the embodiment of the information transmitting and receiving method shown in FIG. 10 and FIG. 11 , and the implementation principle and the beneficial effects are similar, and details are not described herein again.

It should be noted that the division of each module of the above device is only a division of a logical function, and the actual implementation may be integrated into one physical entity in whole or in part, or may be physically separated. And these modules can all be implemented by software in the form of processing component calls; or all of them can be implemented in hardware form; some modules can be realized by processing component calling software, and some modules are realized by hardware. For example, the determining module may be a separately set processing element, or may be integrated in one of the above-mentioned devices, or may be stored in the memory of the above device in the form of program code, by a processing element of the above device. Call and execute the functions of the above determination module. The implementation of other modules is similar. In addition, all or part of these modules can be integrated or implemented independently. The processing elements described herein can be an integrated circuit with signal processing capabilities. In the implementation process, each step of the above method or each of the above modules may be completed by an integrated logic circuit of hardware in the processor element or an instruction in a form of software.

For example, the above modules may be one or more integrated circuits configured to implement the above methods, such as one or more application specific integrated circuits (ASICs), or one or more microprocessors (digital) Singnal processor, DSP), or one or more field programmable gate arrays (FPGAs). As another example, when one of the above modules is implemented in the form of a processing component dispatcher code, the processing component can be a general purpose processor, such as a central processing unit (CPU) or other processor that can invoke the program code. As another example, these modules can be integrated and implemented in the form of a system-on-a-chip (SOC).

In the above embodiments, it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented in software, it may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the processes or functions described in accordance with embodiments of the present application are generated in whole or in part. The computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer readable storage medium or transferred from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions can be from a website site, computer, server or data center Transfer to another website site, computer, server, or data center by wire (eg, coaxial cable, fiber optic, digital subscriber line (DSL), or wireless (eg, infrared, wireless, microwave, etc.). The computer readable storage medium can be any available media that can be accessed by a computer or a data storage device such as a server, data center, or the like that includes one or more available media. The usable medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a DVD), or a semiconductor medium (such as a solid state disk (SSD)) or the like.

FIG. 17 is a schematic structural diagram of still another information sending apparatus according to an embodiment of the present application. The device can be integrated into the aforementioned network device. The information sending apparatus provided by the embodiment of the present application can be used to implement the operations of the network device in the foregoing method embodiment shown in FIG. 5 and FIG. As shown in FIG. 17, the information transmitting apparatus provided in this example includes a processor 171 and a transceiver 172. Optionally, the information sending apparatus may further include a memory for storing execution instructions of the processor 171. Optionally, the transceiver 172 may be implemented by an independent function of a transmitter and a receiver, and may be implemented by using an antenna or the like, which is not limited by the embodiment of the present application. The processor 171 and the transceiver 172 are configured to execute a computer to execute instructions to cause the information transmitting apparatus to perform the various steps performed by the network device in the embodiment shown in Figs. 5 and 6.

Specifically, in the foregoing FIG. 13, the processing module 131 may correspond to the processor 171, and the sending module 132 may correspond to the transceiver 172 or the like.

FIG. 18 is a schematic structural diagram of still another information receiving apparatus according to an embodiment of the present application. The device can be integrated into the aforementioned target terminal. The information receiving apparatus provided in the embodiment of the present application can be used to implement the operations of the target terminal in the foregoing method embodiments shown in FIG. 5 and FIG. As shown in FIG. 18, the information receiving apparatus provided in this example includes a processor 181 and a transceiver 182. Optionally, the information receiving apparatus may further include a memory for storing execution instructions of the processor 181. Optionally, the transceiver 182 may be implemented by an independent function of a transmitter and a receiver, and may be implemented by using an antenna or the like, which is not limited by the embodiment of the present application. The processor 181 and the transceiver 182 are configured to execute a computer to execute instructions to cause the information receiving apparatus to perform the various steps performed by the target terminal in the embodiment shown in Figs. 5 and 6.

Specifically, in the foregoing FIG. 14, the processing module 141 may correspond to the processor 181, and the receiving module 142 may correspond to the transceiver 182 or the like.

FIG. 19 is a schematic structural diagram of still another information sending apparatus according to an embodiment of the present application. The device can be integrated into the aforementioned network device. The information sending apparatus provided by the embodiment of the present application can be used to implement the operations of the network device in the foregoing method embodiment shown in FIG. 10 and FIG. As shown in FIG. 19, the information sending apparatus provided in this example includes: a processor 191 and a transceiver 192. Optionally, the information sending apparatus may further include a memory for storing execution instructions of the processor 191. Optionally, the transceiver 192 can be implemented by an independent function of the transmitter and the receiver, and can be implemented by using an antenna or the like, which is not limited by the embodiment of the present application. The processor 191 and the transceiver 192 are configured to execute a computer to execute instructions to cause the information transmitting apparatus to perform the various steps performed by the network device in the embodiment shown in Figs. 10 and 11 above.

Specifically, in the foregoing FIG. 15, the processing module 151 may correspond to the processor 191, and the sending module 152 may correspond to the transceiver 192 or the like.

FIG. 20 is a schematic structural diagram of still another information receiving apparatus according to an embodiment of the present application. The device can be integrated into the aforementioned target terminal. The information receiving apparatus provided in the embodiment of the present application can be used to implement the operations of the target terminal in the foregoing method embodiments shown in FIG. 10 and FIG. As shown in FIG. 20, the information receiving apparatus provided in this example includes: a processor 201 and a transceiver 202. Optionally, the information receiving apparatus may further include a memory for storing execution instructions of the processor 201. Optionally, the transceiver 202 can be implemented by an independent function of a transmitter and a receiver, and can be implemented by using an antenna or the like. The processor 201 and the transceiver 202 are configured to execute a computer to execute instructions to cause the information receiving apparatus to perform the various steps performed by the target terminal in the embodiment shown in Figs. 10 and 11 above.

Specifically, in the foregoing FIG. 16, the processing module 162 may correspond to the processor 201, and the receiving module 161 may correspond to the transceiver 202 and the like.

Further, FIG. 21 is a schematic structural diagram of a communication system according to an embodiment of the present application. As shown in FIG. 21, the communication system provided in this embodiment includes: a network device 211 and a terminal device 212.

The network device 211 includes at least the information transmitting device in the embodiment shown in FIG. 13 or the information transmitting device in the embodiment shown in FIG. 17. The terminal device 212 includes at least the information receiving device in the embodiment shown in FIG. The information receiving apparatus in the embodiment shown in Fig. 18. For specific implementations and benefits of the network device and the terminal device, refer to the descriptions in FIG. 13 and FIG. 14 or FIG. 17 and FIG. 18, and details are not described herein again.

or

The network device 211 includes at least the information transmitting device in the embodiment shown in FIG. 15 or the information transmitting device in the embodiment shown in FIG. 19. The terminal device 212 includes at least the information receiving device in the embodiment shown in FIG. 16 or FIG. The information receiving device in the illustrated embodiment. For specific implementations and benefits of the network device and the terminal device, refer to the descriptions in FIG. 15 and FIG. 16 or FIG. 19 and FIG. 20, and details are not described herein again.

The above is only a specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or substitutions within the technical scope of the present invention. It should be covered by the scope of the present invention. Therefore, the scope of the invention should be determined by the scope of the appended claims.

Claims

A method for transmitting information, comprising:

When the network device sends the control channel and the data channel scheduled to the target terminal in the same transmission time unit, the network device sends the reference signal RS on the preset frequency resource on the subsequent modulation symbol of the modulation symbol where the control channel is located, The preset frequency resource is a subset of frequency resources allocated to the target terminal;

The network device transmits the data channel on the frequency resource allocated to the target terminal.
The method of claim 1 further comprising:

The network device sends the reference signal on a first frequency resource in a modulation symbol in which the control channel is located, where the first frequency resource is a control channel resource set CORESET allocated to a frequency resource of the target terminal The part of the frequency resource that is occupied.
The method according to claim 1 or 2, wherein the method further comprises:

The network device further sends the reference signal on a second frequency resource in a modulation symbol in which the control channel is located, where the second frequency resource is a frequency resource occupied by the control channel.
The method according to claim 3, wherein the preset frequency resource and the second frequency resource do not intersect, and the union of the preset frequency resource and the second frequency resource is the CORESET Frequency resource occupied.
The method according to claim 3, wherein the preset frequency resource is a frequency resource occupied by the CORESET.
The method according to any one of claims 1-5, wherein the unit of the frequency resource is a resource block RB.
An information receiving method, comprising:

When the terminal detects a control channel scheduled for the terminal in the control channel resource set CORESET, and receives the control channel and the data channel in the same transmission time unit, the terminal is subsequent to the modulation symbol where the control channel is located. Receiving a reference signal RS on a preset frequency resource on the modulation symbol, where the preset frequency resource is a subset of frequency resources allocated to the terminal;

The terminal receives the data channel on the frequency resource allocated to the terminal.
The method of claim 7, wherein the method further comprises:

Receiving, by the terminal, the reference signal on a first frequency resource in a modulation symbol in which the control channel is located, where the first frequency resource is a frequency occupied by the CORESET in a frequency resource allocated to the terminal Part of the resource.
The method according to claim 7 or 8, wherein the method further comprises:

The terminal receives the reference signal on a second frequency resource in a modulation symbol in which the control channel is located, where the second frequency resource is a frequency resource occupied by the control channel.
The method according to claim 9, wherein the preset frequency resource and the second frequency resource do not intersect, and the union of the preset frequency resource and the second frequency resource is the CORESET Frequency resource occupied.
The method according to claim 10, wherein after the terminal receives the data channel on the frequency resource allocated to the terminal, the method further includes:

The terminal demodulates data carried by the data channel according to a reference signal received on the preset frequency resource, a reference signal received on a first frequency resource, and a reference signal received on a second frequency resource.
The method according to claim 8, wherein the preset frequency resource is a frequency resource occupied by the CORESET.
The method according to claim 12, wherein after the terminal receives the data channel on the frequency resource allocated to the terminal, the method further includes:

The terminal demodulates data carried by the data channel according to a reference signal received on the preset frequency resource and a reference signal received on the first frequency resource.
The method according to any one of claims 7 to 13, characterized in that the unit of the frequency resource is a resource block RB.
An information sending device, comprising:

a processing module, configured to determine a control channel and a data channel that are scheduled to be sent to the target terminal in the same transmission time unit;

a sending module, configured to send a reference signal RS on a preset frequency resource on a subsequent modulation symbol of the modulation symbol where the control channel is located, and send the data channel on the frequency resource allocated to the target terminal;

The preset frequency resource is a subset of frequency resources allocated to the target terminal.
The apparatus according to claim 15, wherein the sending module is further configured to send the reference signal on a first frequency resource in a modulation symbol in which the control channel is located, wherein the first frequency The resource is a portion other than the frequency resource occupied by the control channel resource set CORESET among the frequency resources allocated to the target terminal.
The apparatus according to claim 15 or 16, wherein the sending module is further configured to: further send the reference signal on a second frequency resource in a modulation symbol in which the control channel is located, where The second frequency resource is a frequency resource occupied by the control channel.
The device according to claim 17, wherein the preset frequency resource and the second frequency resource do not intersect, and the union of the preset frequency resource and the second frequency resource is the CORESET Frequency resource occupied.
The apparatus according to claim 17, wherein the preset frequency resource is a frequency resource occupied by the CORESET.
The apparatus according to any one of claims 15 to 19, wherein the unit of the frequency resource is a resource block RB.
An information receiving device, comprising:

a processing module, configured to determine that a control channel scheduled to be sent to the terminal is detected in the control channel resource set CORESET, and the control channel and the data channel are received in the same transmission time unit;

a receiving module, configured to receive a reference signal RS on a preset frequency resource on a subsequent modulation symbol of a modulation symbol where the control channel is located, and receive the data channel on the frequency resource allocated to the terminal;

The preset frequency resource is a subset of frequency resources allocated to the terminal.
The apparatus according to claim 21, wherein the receiving module is further configured to receive the reference signal on a first frequency resource within a modulation symbol in which the control channel is located, wherein the first frequency The resource is a portion other than the frequency resource occupied by the CORESET in the frequency resource allocated to the terminal.
The apparatus according to claim 21 or 22, wherein the receiving module is further configured to receive the reference signal on a second frequency resource in a modulation symbol in which the control channel is located, where the The two frequency resources are frequency resources occupied by the control channel.
The device according to claim 23, wherein the preset frequency resource and the second frequency resource do not intersect, and the union of the preset frequency resource and the second frequency resource is the CORESET Frequency resource occupied.
The device according to claim 24, wherein the processing module is further configured to: after the receiving module receives the data channel on the frequency resource allocated to the terminal, according to the pre- And demodulating data carried by the data channel by using a reference signal received on the frequency resource, a reference signal received on the first frequency resource, and a reference signal received on the second frequency resource.
The apparatus according to claim 22, wherein the preset frequency resource is a frequency resource occupied by the CORESET.
The device according to claim 26, wherein the processing module is further configured to: after the receiving module receives the data channel on the frequency resource allocated to the terminal, according to the pre- The reference signal received on the frequency resource and the reference signal received on the first frequency resource are set to demodulate data carried by the data channel.
The apparatus according to any one of claims 21-27, wherein the unit of the frequency resource is a resource block RB.
An information transmitting apparatus, comprising: a processor and a memory;

The memory is configured to store a program instruction, the processor is configured to read a program instruction in the memory, and execute the information transmission method according to any one of claims 1-6 according to the program instruction in the memory.
An information receiving apparatus, comprising: a processor and a memory;

The memory is configured to store a program instruction, the processor is configured to read a program instruction in the memory, and execute the information receiving method according to any one of claims 7-14 according to the program instruction in the memory.