CN111867074A

CN111867074A - Method for receiving data and transmitting data, and communication device

Info

Publication number: CN111867074A
Application number: CN201910364413.0A
Authority: CN
Inventors: 吴霁; 大卫·简-玛丽·马瑞泽; 张佳胤
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2019-04-30
Filing date: 2019-04-30
Publication date: 2020-10-30
Anticipated expiration: 2039-04-30
Also published as: CN111867074B; WO2020221055A1

Abstract

The application provides a method and a communication device for receiving data and sending data, so that resource waste can be avoided and signaling overhead can be saved. The method can comprise the following steps: the terminal equipment receives Downlink Control Information (DCI), wherein the DCI is used for indicating a time domain resource indication, and the time domain resource indication comprises information of a relative position between a time domain resource used for transmitting data and the time domain resource used for transmitting the DCI; the terminal device determines a starting position of a time domain resource for transmitting data and receives data based on the starting position.

Description

Method for receiving data and transmitting data, and communication device

Technical Field

The present application relates to the field of communications, and more particularly, to a method and a communication apparatus for receiving data and transmitting data.

Background

Due to the rapid development of wireless communication technology, spectrum resources are increasingly in short supply, and the exploration of unauthorized frequency bands is promoted. The third Generation Partnership Project (3rd Generation Partnership Project, 3GPP) introduced Licensed Assisted Access (LAA) and enhanced licensed assisted access (eLAA) technologies in release 13(release-13, R-13) and release 14(release-14, R-14), respectively, i.e., a non-independent (non-persistent) deployment LTE/LTE-a system over unlicensed spectrum that maximizes the use of unlicensed spectrum resources with the assistance of licensed spectrum.

Communication systems deployed over unlicensed spectrum (unlicensed spectrum) typically use or share radio resources in a contention-based manner. Generally, a transmitting device first listens to an unlicensed channel (or unlicensed spectrum) for idleness before transmitting a signal. For example, the sending end device confirms whether the channel is idle through a Listen Before Talk (LBT) mechanism.

Taking the network device as an example, if the LBT initiated by the network device is successful, the network device obtains the channel usage right. The network device occupies the channel within a Channel Occupancy Time (COT), for example, the network device may send data to the terminal device, and the network device may indicate information of an absolute position of a time domain resource of the data to the terminal device through Downlink Control Information (DCI).

However, considering that the result of LBT is real-time, i.e. the LBT initiated by the network device may be successful at different locations, the network device needs to update the indication information of the DCI in real-time to indicate the time domain resource of the terminal device data based on the above indication manner, which is very wasteful of resources.

Disclosure of Invention

The application provides a method and a communication device for receiving data and sending data, so that resource waste can be avoided, signaling overhead is saved, and transmission delay is reduced.

In a first aspect, a method of communication is provided. The method may be executed by the terminal device, or may also be executed by a chip or a circuit configured in the terminal device, which is not limited in this application.

The method can comprise the following steps: terminal equipment receives Downlink Control Information (DCI), wherein the DCI is used for indicating a time domain resource indication, and the time domain resource indication comprises information of a relative position between a time domain resource used for transmitting data and the time domain resource used for transmitting the DCI; and the terminal equipment receives the data based on the time domain resource indication.

Based on the above technical solution, the terminal device receives Downlink Control Information (DCI), where the DCI may be used to indicate a Start and Length Indicator (SLIV) (or may also be referred to as a time domain resource Indicator). The SLIV comprises information of relative positions between time domain resources used for transmitting data and time domain resources used for transmitting DCI, therefore, regardless of the position LBT of the network equipment is successful, or when the initial position of the time domain resources used for transmitting data appears at different time domain positions, time domain resource indication information in the DCI does not need to be updated, because the SLIV indicates the relative positions between the time domain resources used for transmitting data and the time domain resources used for transmitting DCI, thereby the waste of resources can be avoided, the requirement on the network equipment is reduced, and the condition that the terminal equipment correctly acquires the resource positions of the transmission data can be ensured, further, the data can be correctly received, the transmission time delay is reduced, and the data transmission performance is ensured.

With reference to the first aspect, in certain implementations of the first aspect, the time domain resource indication is used to indicate S and L, where S denotes a number of symbols between a time domain resource used for transmitting the data and a starting position of the time domain resource used for transmitting the DCI, L denotes a length of the time domain resource used for transmitting the data, and S, L is an integer greater than or equal to 0.

Based on the above technical solution, the terminal device may determine the starting position of the time domain resource used for transmitting data based on the starting position of the time domain resource of the received DCI, so as to know when to start receiving data. In addition, the value of S does not change continuously with the change of the starting position of the time domain resource for transmitting data, so that signaling overhead caused by the network device constantly informing the terminal device of the absolute position of the time domain resource for transmitting data can be saved, and resource waste is avoided.

With reference to the first aspect, in certain implementation manners of the first aspect, a value of S is any one of: t, T +1, T + 2; wherein T represents the number of symbols occupied by time domain resources for transmitting the DCI, and T is an integer greater than 1 or equal to 1.

With reference to the first aspect, in some implementation manners of the first aspect, the value of S is 0 when a time domain resource occupied by a multicast common physical downlink control channel GC-PDCCH and/or a time domain resource occupied by a terminal device dedicated physical downlink control channel PDCCH do not include a complete symbol.

With reference to the first aspect, in certain implementations of the first aspect, the method further includes: the terminal equipment acquires first indication information, wherein the first indication information is used for indicating information of frequency domain resources used for transmitting the data.

Based on the above technical solution, when the time domain resource occupied by the GC-PDCCH and/or the time domain resource occupied by the terminal device dedicated PDCCH do not include a complete symbol, that is, the time domain resource occupied by the GC-PDCCH and/or the time domain resource occupied by the terminal device dedicated PDCCH include the same symbol as the time domain resource used for transmitting data, the terminal device may determine the frequency domain resource based on the obtained indication information.

Optionally, the indication information may be an implicit indication or a display indication; alternatively, the indication information may be indicated to the terminal device by the network device, or may be predefined by a protocol.

With reference to the first aspect, in certain implementations of the first aspect, the first indication information is used to indicate any one of: the frequency domain resources used for transmitting the data are not overlapped with the frequency domain resources occupied by the GC-PDCCH; or, the frequency domain resource used for transmitting the data is not overlapped with the frequency domain resource occupied by the terminal equipment dedicated PDCCH; or, the frequency domain resource used for transmitting the data is not overlapped with the frequency domain resource occupied by the GC-PDCCH and the frequency domain resource occupied by the special PDCCH of the terminal equipment; or, the frequency domain resource used for transmitting the data is a resource other than the frequency domain resource occupied by the GC-PDCCH, and the first indication information includes information of the frequency domain resource occupied by the GC-PDCCH; or, the frequency domain resource used for transmitting the data is not overlapped with the frequency domain resource occupied by the terminal equipment dedicated PDCCH, and the terminal equipment dedicated PDCCH comprises indication information used for indicating that the GC-PDCCH is not transmitted.

Optionally, data coexists with the GC-PDCCH and/or PDCCH on different frequency domain resources of the same symbol.

Based on the above technical solution, the terminal device may perform a method for performing data frequency domain resource analysis, that is, rate-matching (rate-matching), on a symbol where data coexists with the GC-PDCCH and/or the PDCCH according to different situations, such as the above-mentioned multiple situations, so as to determine the frequency domain resource used for transmitting the data.

With reference to the first aspect, in certain implementations of the first aspect, the method further includes: and the terminal equipment receives second indication information, wherein the second indication information is used for indicating the number of symbols between the S and the starting position of the time domain resource used for transmitting the data and the time domain resource used for transmitting the DCI.

Optionally, the indication information may be an implicit indication or a display indication.

Based on the above technical solution, the terminal device may determine, according to the indication of the network device, the number of symbols between S and the starting position of the time domain resource used for transmitting data and the time domain resource used for transmitting DCI, and further may determine when to start receiving data.

With reference to the first aspect, in certain implementations of the first aspect, the method further includes: the terminal equipment determines the position of time-frequency resources used for transmitting the data according to one or more of the following items: the time frequency resource is used for transmitting a synchronous signal block, the time frequency resource is used for transmitting a channel state information reference signal CSI-RS, the time frequency resource is used for transmitting a paging, or the time frequency resource is used for demodulating a demodulation reference signal DMRS of the data.

Based on the above technical solution, when determining the position of the time-frequency resource for transmitting data, the terminal device may consider one or more of the following items: the time frequency resource used for transmitting the synchronous signal block, the time frequency resource used for transmitting the channel state information reference signal CSI-RS, the time frequency resource used for transmitting the paging or the time frequency resource used for demodulating the demodulation reference signal DMRS of the data, thereby avoiding the overlapping of the time frequency resource used for transmitting the data and the time frequency resource of other signals and influencing the data transmission performance.

In a second aspect, a method of communication is provided. The method may be performed by a network device, or may be performed by a chip or a circuit configured in the network device, which is not limited in this application.

The method can comprise the following steps: the network equipment determines a time domain resource indication; and the network equipment sends the DCI to terminal equipment, wherein the DCI comprises information of the time domain resource indication, and the time domain resource indication comprises information of the relative position between the time domain resource used for transmitting the data and the time domain resource used for transmitting the DCI.

Based on the above technical solution, when the network device indicates the time domain resource indication to the terminal device, it may indicate the information of the relative position between the time domain resource for transmitting data and the time domain resource for transmitting DCI, therefore, no matter where LBT of the network device is successful, or when the starting position of the time domain resource for transmitting data appears at different time domain positions, the time domain resource indication information in DCI does not need to be updated, thereby avoiding resource waste, reducing the requirement on the network device, and also ensuring that the terminal device correctly obtains the resource position for transmitting data, and further correctly receives data, and ensures data transmission performance.

With reference to the second aspect, in certain implementations of the second aspect, the time domain resource indication is used to indicate S and L, where S denotes a number of symbols between a time domain resource used for transmitting the data and a starting position of the time domain resource used for transmitting the DCI, L denotes a length of the time domain resource used for transmitting the data, and S, L is an integer greater than 0 or equal to 0.

With reference to the second aspect, in some implementations of the second aspect, the value of S is any one of the following: t, T +1, T + 2; wherein T represents the number of symbols occupied by time domain resources for transmitting the DCI, and T is an integer greater than 1 or equal to 1.

With reference to the second aspect, in some implementation manners of the second aspect, the value of S is 0 when the time domain resource occupied by the multicast common physical downlink control channel GC-PDCCH and/or the time domain resource occupied by the terminal device dedicated physical downlink control channel PDCCH do not include a complete symbol.

With reference to the second aspect, in certain implementations of the second aspect, the method further includes: the network equipment sends first indication information to the terminal equipment, wherein the first indication information is used for indicating information of frequency domain resources used for transmitting the data.

With reference to the second aspect, in some implementations of the second aspect, the first indication information is used to indicate any one of: the frequency domain resources used for transmitting the data are not overlapped with the frequency domain resources occupied by the GC-PDCCH; or, the frequency domain resource used for transmitting the data is not overlapped with the frequency domain resource occupied by the terminal equipment dedicated PDCCH; or, the frequency domain resource used for transmitting the data is not overlapped with the frequency domain resource occupied by the GC-PDCCH and the frequency domain resource occupied by the special PDCCH of the terminal equipment; or, the frequency domain resource used for transmitting the data is a resource other than the frequency domain resource occupied by the GC-PDCCH, and the first indication information includes information of the frequency domain resource occupied by the GC-PDCCH; or, the frequency domain resource used for transmitting the data is not overlapped with the frequency domain resource occupied by the terminal equipment dedicated PDCCH, and the terminal equipment dedicated PDCCH comprises indication information used for indicating that the GC-PDCCH is not transmitted.

With reference to the second aspect, in certain implementations of the second aspect, the method further includes: and the network equipment sends second indication information to the terminal equipment, wherein the second indication information is used for indicating the number of symbols between the S and the starting position of the time domain resource used for transmitting the data and the time domain resource used for transmitting the DCI.

In a third aspect, a communication device is provided, which is configured to perform the method provided in the first aspect. In particular, the communication device may comprise means for performing the method provided by the first aspect.

In a fourth aspect, a communication device is provided, which is configured to perform the method provided by the second aspect. In particular, the communication device may comprise means for performing the method provided by the second aspect.

In a fifth aspect, a communication device is provided, which includes a memory for storing instructions and a processor for executing the instructions stored by the memory, so that the communication device performs the method provided in the first aspect.

In a sixth aspect, a communications apparatus is provided that includes a memory to store instructions and a processor to execute the instructions stored by the memory, such that the communications apparatus performs the method provided by the second aspect.

In a seventh aspect, a chip is provided, where the chip includes a processing module and a communication interface, where the processing module is configured to control the communication interface to communicate with the outside, and the processing module is further configured to implement the method provided in the first aspect.

In an eighth aspect, a chip is provided, where the chip includes a processing module and a communication interface, the processing module is configured to control the communication interface to communicate with the outside, and the processing module is further configured to implement the method provided in the second aspect.

A ninth aspect provides a computer readable storage medium having stored thereon a computer program which, when executed by a communication apparatus, causes the communication apparatus to carry out the method of the first aspect and any possible implementation form of the first aspect.

A tenth aspect provides a computer-readable storage medium having stored thereon a computer program which, when executed by a communication apparatus, causes the communication apparatus to implement the second aspect, and the method in any possible implementation form of the second aspect.

In an eleventh aspect, there is provided a computer program product comprising instructions which, when executed by a computer, cause the communication apparatus to carry out the method provided by the first aspect.

In a twelfth aspect, there is provided a computer program product comprising instructions which, when executed by a computer, cause the communication apparatus to carry out the method provided by the second aspect.

In a thirteenth aspect, a communication system is provided, which includes the aforementioned network device and terminal device.

Based on the embodiment of the application, the SLIV indicated by the network device to the terminal device includes information of the relative position between the time domain resource used for transmitting data and the time domain resource used for transmitting DCI, so that no matter where LBT of the network device is successful, or when the starting position of the time domain resource used for transmitting data appears at different time domain positions, the time domain resource indication information in DCI does not need to be updated, thereby avoiding resource waste, reducing the requirement on the network device, and also ensuring that the terminal device correctly obtains the resource position for transmitting data, and further correctly receives data, and ensures data transmission performance.

Drawings

Fig. 1 shows a schematic diagram of a communication system suitable for use in embodiments of the present application;

fig. 2 shows another schematic diagram of a communication system suitable for use in embodiments of the present application;

fig. 3 is a schematic diagram illustrating an LBT listening mechanism suitable for use in an embodiment of the present application;

fig. 4 is a schematic diagram illustrating another LBT listening mechanism suitable for use in embodiments of the present application;

figures 5 and 6 show two possible slot frame structures;

FIG. 7 shows a diagram of channel occupancy;

FIG. 8 shows a schematic of a mini-slot;

fig. 9 is a schematic diagram of a communication method provided according to an embodiment of the present application;

fig. 10, wherein (1) to (3) show diagrams of CORESET taken as a whole for one symbol suitable for use in embodiments of the present application;

fig. 11 shows a schematic diagram of CORESET and PDSCH transmitted in the same symbol suitable for use in embodiments of the present application;

FIGS. 12 (1) and (2) show a schematic diagram of the transmissions RMSI CORESET and RMSIPDSCH suitable for use in embodiments of the present application;

FIG. 13 shows yet another schematic diagram of transmitting RMSI CORESETs and RMSI PDSCH suitable for use with embodiments of the present application;

FIGS. 14 (1) and (2) show schematics of PDSCH DMRS suitable for use in embodiments of the present application;

fig. 15 is a schematic block diagram of a communication device provided by an embodiment of the present application;

fig. 16 is yet another schematic block diagram of a communication device provided by an embodiment of the present application;

fig. 17 is a schematic block diagram of a terminal device provided in an embodiment of the present application;

fig. 18 is a schematic block diagram of a network device provided in an embodiment of the present application.

Detailed Description

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

The technical scheme of the embodiment of the application can be applied to various communication systems, for example: a future fifth generation (5G) system or a New Radio (NR), a global system for mobile communications (GSM) system, a Code Division Multiple Access (CDMA) system, a Wideband Code Division Multiple Access (WCDMA) system, a General Packet Radio Service (GPRS), a Long Term Evolution (LTE) system, an LTE Frequency Division Duplex (FDD) system, an LTE Time Division Duplex (TDD), a universal mobile communication system (universal mobile telecommunications system, UMTS), a worldwide interoperability for microwave communication (WiMAX), and the like. The technical scheme of the embodiment of the application can also be applied to device (D2D) communication, machine to machine (M2M) communication, Machine Type Communication (MTC), and communication in a vehicle networking system. The communication modes in the car networking system are collectively referred to as V2X (X represents anything), for example, the V2X communication includes: vehicle to vehicle (V2V), vehicle to roadside infrastructure (V2I), vehicle to pedestrian (V2P) or vehicle to network (V2N), etc.

For the understanding of the embodiments of the present application, a communication system suitable for the embodiments of the present application will be described in detail with reference to fig. 1 and 2.

Fig. 1 is a diagram of a wireless communication system 100 suitable for use in embodiments of the present application. As shown in fig. 1, the wireless communication system 100 may include at least one network device, such as the network device 111 shown in fig. 1, and the wireless communication system 100 may further include at least one terminal device, such as the terminal devices 121 to 123 shown in fig. 1. The network equipment and the terminal equipment can be both provided with a plurality of antennas, and the network equipment and the terminal equipment can communicate by using a multi-antenna technology.

When the network device communicates with the terminal device, the network device may manage one or more cells, and an integer number of terminal devices may be in one cell. Optionally, the network device 111 and the terminal devices 121 to 123 form a single-cell communication system, and without loss of generality, a cell is denoted as cell # 1. Network device 111 may be a network device in cell #1, or network device 111 may serve a terminal device (e.g., terminal device 121) in cell # 1.

It should be noted that a cell may be understood as an area within the wireless signal coverage of a network device.

Fig. 2 is another schematic diagram of a wireless communication system 200 suitable for use in embodiments of the present application. As shown in fig. 2, the technical solution of the embodiment of the present application may also be applied to D2D communication. The wireless communication system 200 includes a plurality of terminal devices, such as terminal device 124 through terminal device 126 in fig. 2. Communication may be performed directly between end device 124 to end device 126. For example, terminal device 124 and terminal device 125 may transmit data to terminal device 126 separately or simultaneously.

It should be understood that fig. 1 and 2 are simplified schematic diagrams that are merely examples for ease of understanding, and that other network devices or other terminal devices may also be included in the communication system 100 or the communication system 200, which are not shown.

It should also be understood that the network device in the wireless communication system may be any device having a wireless transceiving function. Such devices include, but are not limited to: evolved Node B (eNB), Radio Network Controller (RNC), Node B (NB), Base Station Controller (BSC), Base Transceiver Station (BTS), Home Base Station (e.g., Home evolved Node B, or Home Node B, HNB), BaseBand Unit (BBU), Access Point (AP) in wireless fidelity (WIFI) system, wireless relay Node, wireless backhaul Node, Transmission Point (TP), or transmission and reception Point (transmission and reception Point), etc., and may also be 5G, such as NR, gbb in the system, or transmission Point (TRP or TP), one or a group of Base stations in the 5G system (including multiple antennas, NB, or a panel of a network, and may also be a network Node or a panel of a network, such as a baseband unit (BBU), or a Distributed Unit (DU), etc.

In some deployments, the gNB may include a Centralized Unit (CU) and a DU. The gNB may further include an Active Antenna Unit (AAU). The CU implements part of the function of the gNB and the DU implements part of the function of the gNB. For example, the CU is responsible for processing non-real-time protocols and services, and implementing functions of a Radio Resource Control (RRC) layer and a Packet Data Convergence Protocol (PDCP) layer. The DU is responsible for processing a physical layer protocol and a real-time service, and implements functions of a Radio Link Control (RLC) layer, a Medium Access Control (MAC) layer, and a Physical (PHY) layer. The AAU implements part of the physical layer processing functions, radio frequency processing and active antenna related functions. Since the information of the RRC layer eventually becomes or is converted from the information of the PHY layer, the higher layer signaling, such as RRC layer signaling, can also be considered as being transmitted by the DU or by the DU + AAU under this architecture. It is to be understood that the network device may be a device comprising one or more of a CU node, a DU node, an AAU node. In addition, the CU may be divided into network devices in an access network (RAN), or may be divided into network devices in a Core Network (CN), which is not limited in this application.

It should also be understood that terminal equipment in the wireless communication system may also be referred to as User Equipment (UE), an access terminal, a subscriber unit, a subscriber station, a mobile station, a remote terminal, a mobile device, a user terminal, a wireless communication device, a user agent, or a user equipment. The terminal device in the embodiment of the present application may be a mobile phone (mobile phone), a tablet computer (Pad), a computer with a wireless transceiving function, a Virtual Reality (VR) terminal device, an Augmented Reality (AR) terminal device, a wireless terminal in industrial control (industrial control), a wireless terminal in self driving (self driving), a wireless terminal in remote medical (remote), a wireless terminal in smart grid (smart grid), a wireless terminal in transportation safety (transportation safety), a wireless terminal in smart city (smart city), a wireless terminal in smart home (smart home), and the like. The embodiments of the present application do not limit the application scenarios.

To facilitate understanding of the embodiments of the present application, a brief description of several terms referred to in the present application will be given below.

1. Licensed and unlicensed spectrum

The spectrum used by a wireless communication system may include two types, licensed spectrum (licensed spectrum) and unlicensed spectrum (unlicensed spectrum). Generally, carriers on the licensed spectrum are referred to as licensed carriers and carriers on the unlicensed spectrum are referred to as unlicensed carriers. With the development of wireless communication technology, the amount of information transmitted in a wireless communication network is increasing day by day, and the unauthorized spectrum transmission information is preempted, so that the data throughput in the wireless communication network can be improved, and the requirements of users can be better met. In a long-term evolution unlicensed-access usage (LAA-LTE) system, a node of the LAA-LTE uses channel resources through a Listen Before Talk (LBT) principle, wherein the LBT is a Carrier Sense Multiple Access (CSMA) technique. In the LAA system, an LBT scheme is adopted to contend for accessing a channel, but the starting time point occupied by the channel in the LBT scheme is random, so the starting time point of the LAA-LTE carrier signal occurrence is also random.

In current LAA systems, LBT is typically based on Energy Detection (ED) to support coexistence of different nodes and technologies. When the measured interference level exceeds a certain level, the node will simply back off (backoff). The preamble detection based mechanism in WiFi systems has further advantages. A transmission opportunity (TXOP) length is carried in a payload (payload) of the preamble, and backoff depends on preamble detection and demodulation/decoding of the payload.

Generally, after competing for a channel, a sending end device can send a channel occupation signal to other peripheral devices, and the channel occupation signal indicates the duration that the sending end device needs to occupy on the contended channel to the other devices, so that collision of the other devices is avoided, and communication efficiency is improved. Within which time duration transmission or reception may occur.

The sending device may be a network device, such as network device 111 in communication system 100. Alternatively, the sending end device may also be a terminal device, for example, the terminal device 121, the terminal device 122, or the terminal device 123 in the communication system 100. Specifically, if the LBT initiated by the network device is successful, it is determined that the communication with the terminal device can be performed, and if the data is sent in the communication process, the network device is the sending terminal device; if the data is received in the communication process, the network equipment is the receiving end equipment. If the LBT initiated by the terminal equipment is successful, determining that the communication can be carried out with the network equipment, and if the data is sent in the communication process, the terminal equipment is sending end equipment; if the data is received in the communication process, the network equipment is the receiving end equipment.

For clarity, the following describes a general procedure after the transmitting device obtains the channel usage right.

After the LBT is successful, the sending end device sends a channel occupying signal, where the channel occupying signal is used to indicate, to other devices, a duration that the sending end device is going to use a channel on a contended channel.

If the LBT initiated by the sending end device is successful, the sending end device obtains the channel use right. The sending-end device occupies the channel within a Channel Occupancy Time (COT). The COT may be configured for the network device, or specified by a standard, or pre-stored, and the like, which is not limited in this embodiment of the application. In other words, the sending device may transmit within the COT without being disturbed by other devices. The COT may be less than or equal to a Maximum Channel Occupancy Time (MCOT) or may be a TXOP.

Hereinafter, description will be made with "COT" as an example of the channel occupying time period.

In general, when the sending end device is a network device, the transmission performed in the corresponding COT is downlink transmission; when the sending end device is a terminal device, the transmission performed in the corresponding COT is uplink transmission. Alternatively, the sending device may share the obtained channel usage right in the COT to other devices. For example, when the sending end device is a network device, the network device may share the channel usage right to the terminal device, that is, allow the terminal device to perform transmission within the COT. That is, there may be a handover of uplink transmission and downlink transmission within a certain COT. This switching may be one or more times.

2. Listen before send LBT

In order to ensure coexistence with other devices operating in unlicensed frequency bands, the 5G system or the next generation system adopts a channel contention access mechanism of LBT. Fig. 3 and 4 show two types of LBT listening mechanisms.

One type of LBT sensing mechanism as shown in fig. 3, an LBT device may perform independent back-off on multiple carriers, e.g., Component Carriers (CCs). As in fig. 3, for example, when the contention node Wi-Fi is occupied, that is, when there is a Wi-Fi protocol data unit on carrier 2, the LBT device independently backs off (i.e., self-backs off) on

carriers

1, 3, and 4, and performs a busy extended clear channel assessment (e.g., a busy extended clear channel assessment slot (slot) in fig. 3) on carrier 2. The busy-extended clear channel assessment may be understood as estimating the channel duration occupied by the LBT device on carrier 2. As another example in fig. 3, the LBT device independently backs off on carrier 2 and carrier 3 and makes a busy-extension clear channel assessment on carrier 4. In fig. 3, the busy initial clear channel assessment may be understood as a clear channel assessment performed prior to WiFi node occupation. Idle initial channel estimation may be understood as idle channel estimation performed prior to base station occupation. The busy-extended clear channel assessment may be understood as a channel assessment made during WiFi node occupancy. Idle extended clear channel assessment may be understood as channel assessment performed prior to data transmission. In the LBT sensing mechanism shown in fig. 3, after backoff is completed on a certain carrier, transmission is delayed to wait for other component carriers that are still backoff. As in carrier 1 through carrier 4 of fig. 3, in particular, LBT does not transmit data on carrier 4 while it is self-backoff on carrier 1 and carrier 3 as in fig. 3. When all carriers performing LBT complete backoff, the device needs to make an additional one-shot channel assessment (one-shot cca) for a time length to ensure that all carriers are idle. Such as the idle initial idle channel assessment duration in fig. 3. If all carriers are idle, the base station transmits simultaneously on the idle carriers. For example, one duration may be 25 microseconds (us).

Yet another type of LBT sensing mechanism is shown in fig. 4, where the LBT device performs back-off only on a selected component carrier, e.g. on a selected carrier in fig. 4. At the end of backoff, initial clear channel assessment (e.g., busy initial clear channel assessment time slots in fig. 4) is performed on carrier 1, carrier 2, and carrier 3 before data transmission begins. That is, when the backoff is finished, performing one-shot CCA on other component carriers, and if the component carrier is idle, performing data transmission; if the component carrier is not idle, the component carrier cannot be transmitted with data at this time. In fig. 4, the busy initial clear channel assessment may be understood as a clear channel assessment performed prior to WiFi node occupation. Idle initial channel estimation may be understood as idle channel estimation performed prior to base station occupation. The busy-extended clear channel assessment may be understood as a channel assessment made during WiFi node occupancy. Idle extended clear channel assessment may be understood as a channel assessment made prior to data transmission.

As shown in fig. 3 or fig. 4, the LBT device may be a communication device in a 5G system or a next generation system, such as LAA LTE, WiFi, NR-U or other communication devices operating in unlicensed (unlicensed) frequency band. In an actual scenario, the interference received by the device performing LBT in fig. 3 or fig. 4 comes from a WiFi system, and the interference received by the device performing LBT may also come from a 5G system or a next generation system, such as LAA LTE, NR-U or other communication systems operating in an unlicensed frequency band, which is not limited in this application.

It should be noted that the LBT listening mechanism adopted in the embodiment of the present application is not limited to the listening mechanism shown in fig. 3 or fig. 4.

3. Channel occupancy signals

After contending for the channel, the sending-end device may send a channel occupation signal to other peripheral devices. The channel occupation signal can be used for indicating the transmission time length which needs to be occupied by the sending terminal equipment on the contended channel to other equipment, so that collision of other equipment is avoided. In addition, the channel occupancy signal may also instruct other devices to feed back information of the channel occupancy.

It should be noted that, in the embodiment of the present application, the channel occupancy signal may also be channel occupancy indication information or channel indication information, and the specific name thereof does not limit the scope to be protected by the present application.

4. Symbol (symbol)

Minimum unit of time domain resource. The time length of one symbol is not limited in the embodiment of the present application. The length of one symbol may be different for different subcarrier spacings. The symbols may include uplink symbols and downlink symbols, by way of example and not limitation; the downlink symbols may be referred to as OFDM symbols, for example. In the embodiment of the present application, the symbol may be another example of the resource unit.

5. Time slot

A slot is a period of time resource. For example, in NR, a slot may be the smallest scheduling unit of time. One slot format is to include 14 OFDM symbols, and the CP of each OFDM symbol is a normal CP (normal CP); one slot format is that 12 OFDM symbols are included, and the CP of each OFDM symbol is extended CP; one slot format is to contain 7 OFDM symbols, each of which has a normal CP. The OFDM symbols in one slot may be all used for uplink transmission; can be used for downlink transmission; or one part can be used for downlink transmission, one part can be used for uplink transmission, and one part can be reserved for no transmission. It should be understood that the above examples are illustrative only and should not be construed as limiting the present application in any way. The slot format is not limited to the above example for system forward compatibility considerations.

Two slot frame structures are described in connection with fig. 5 and 6.

As shown in fig. 5, the frame structure shown in fig. 5 is a frame structure in the LTE system. In one scheduling slot, the first 1 OFDM symbol, or the first 2 OFDM symbols, or the first 3 OFDM symbols carry Downlink Control Information (DCI), and the following symbols carry data. In other words, in LTE, DCI is located on one or more of the first 3 symbols of each frame.

In order to improve the flexibility of system scheduling, a concept of micro-scheduling slot, mini-slot, is introduced into NR, and the length of the concept may be: 2 OFDM symbols, 4 OFDM symbols, or 7 OFDM symbols, such as the 4-symbol mini-slot and the 2-symbol mini-slot shown in fig. 6. The 1 st symbol in each mini-slot has a control resource set (CORESET) of the mini-slot, which is used for carrying scheduling information of the mini-slot.

Controlling the resource set: the resource set for transmitting the downlink control information may also be referred to as a control resource region or a physical downlink control channel resource set.

Each control resource set may be a set of Resource Element Groups (REGs). The REG is a basic unit for physical resource allocation of the downlink control signaling, and is used for defining mapping from the downlink control signaling to the REs. For example, in the LTE protocol, one REG is defined to be composed of 4 Resource Elements (REs) of a non-Reference Signal (RS) that are consecutive in the frequency domain. It should be understood that REG is only a unit for resource allocation, and should not constitute any limitation to the present application, and the present application does not exclude the definition of new resource allocation units to implement the same or similar functions in future protocols.

For a network device, a control resource set may be understood as a set of resources that may be used for transmitting a Physical Downlink Control Channel (PDCCH); for the terminal device, the resource corresponding to the search space of the PDCCH of each terminal device belongs to the control resource set. In other words, the network device may determine, from the control resource set, resources used for transmitting the PDCCH, and the terminal device may determine a search space of the PDCCH according to the control resource set.

The control resource set may include time-frequency resources, for example, a segment of bandwidth in a frequency domain, or one or more subbands; which may be one or more symbols in the time domain. One control resource set may be a contiguous or non-contiguous resource unit in the time-frequency domain, e.g., a contiguous Resource Block (RB) or a non-contiguous RB.

It should be understood that the specific contents of the frequency domain resource, the time domain resource and the time frequency domain resource listed above are only exemplary and should not limit the present application in any way. For example, the RB is an example of a resource unit, and the size of the RB may be a resource defined in the NR protocol, may be a resource defined in a future protocol, or may be replaced with another name. For another example, the control resource set may also be one or more slots, radio frames, subframes, minislots (or sub-slots), or Transmission Time Intervals (TTIs) in the time domain, which is not particularly limited in this embodiment of the present application.

In the embodiment of the present application, a control resource set is referred to as a mini-slot in the time domain.

It should be understood that the above listed control resource sets are only exemplary, and the embodiments of the present application are not limited thereto. For example, a control resource set may be configured, for example, by a ControlResourceSet information element in a higher layer parameter. The higher layer parameters may include, for example, an Identifier (ID) of a control resource set, frequency domain resources, the number of symbols included in a duration (duration), and the like. The present application does not limit the specific parameters for configuring the control resource set.

6. Time frequency resource

In the embodiment of the present application, data or information may be carried by time-frequency resources, where the time-frequency resources may include resources in a time domain and resources in a frequency domain. In the time domain, the time-frequency resource may include one or more time-domain units (or may also be referred to as time units), and in the frequency domain, the time-frequency resource may include one or more frequency-domain units.

One time domain unit may be one symbol, or one mini-slot (mini-slot), or one time slot (slot), or one subframe (subframe). Wherein the duration of one subframe in the time domain may be 1 millisecond (ms). A mini-slot may include at least one symbol (e.g., 2 symbols or 4 symbols or 7 symbols or 14 symbols, or any other number of symbols less than or equal to 14 symbols). The time domain unit size is only listed for convenience of understanding the scheme of the present application, and should not be understood to limit the present invention.

A frequency domain unit may be a Resource Block (RB), or a group of Resource Blocks (RBG), or a predefined subband (subband).

In the embodiments of the present application, "data" or "information" may be understood as bits generated after an information block is coded, or "data" or "information" may be understood as modulation symbols generated after the information block is coded and modulated.

As can be seen from the above description, a transmitting device (e.g., a network device) operating in an unlicensed frequency band may start LBT at any time, and LBT may end at any time due to uncertainty in occurrence and duration of interference generated by other systems. As shown in fig. 7, the transmitting device seizes the channel in the middle of slot 0, and for LTE LAA, it supports transmission opportunity (e.g. TXOP) starting from the 1 st symbol of slot or starting from the 7 th symbol. The receiving end device (e.g., terminal device) may detect DCI at the two locations of each slot outside the transmission opportunity, so as to determine whether the TXOP exists.

When the receiving end device detects the TXOP, the DCI sent to the receiving end device by the sending end device may only be located in the first 1 OFDM symbol, the first 2 OFDM symbols, or the first 3 OFDM symbols of each slot, that is, when the receiving end device does not detect the DCI in the first 3 OFDM symbols of a slot, the receiving end device may consider that the sending end device does not send data in the slot, and in order to save energy consumption, the receiving end device may not try to detect the DCI again in other OFDM symbols (symbol 3-symbol 13) of the slot. The receiving end device repeats the above process in each slot.

Then, assuming that the LBT succeeds in the symbol 8 of slot 0, that is, the transmitting end device seizes the channel in the symbol 8 of slot 0, since the receiving end device does not detect DCI at this position, the receiving end device will not receive data even if the transmitting end device transmits the data at the symbols 8-13. In this case, symbols 8 to 13 of slot 0 can only be empty or transmit useless signals, that is, downlink control information and data can only be transmitted in the next complete slot (for example, slot 1) and the following slots.

For this purpose, a mini-slot is proposed. As shown in fig. 8, the sending-end device prepares 1 complete slot (full slot), a mini-slot with a length of 2 symbols, a mini-slot with a length of 4 symbols, and a mini-slot with a length of 7 symbols before LBT, and adjusts an actual transmission mode according to the final LBT.

As shown in fig. 8, when LBT of the 1 st symbol (i.e. symbol 0) in a slot is successful, 2 symbols mini-slot may be transmitted at

symbol

1, 4 symbols mini-slot may be transmitted at

symbol

3, and 7 symbols mini-slot may be transmitted at symbol 7. Before LBT succeeds with different symbols in the slot, different methods are adopted to send downlink data. Taking a mini-slot of 2 symbols as an example, when the sending-end device succeeds in LBT at different time instants, the mini-slot may appear at 4 positions within the slot, such as symbols 1-2, symbols 5-6, symbols 8-9, and symbols 12-13 shown in fig. 8.

It should be understood that the several cases shown in fig. 8 are only exemplary and do not limit the embodiments of the present application.

Table 1 shows a DCI resource indication table. As can be seen from table 1, there are 4 bits (bit) in the DCI for indicating the time domain position of the downlink resource. A certain row configuration (rowx) in the PDSCH allocation list (PDSCH-allocation list) is indicated by 4 bits, where x is an integer greater than or equal to 0, and rowx may correspond to the following information: k0, mapping type (mappingtype), and startsymbolndlength configuration values. That is to say, based on the row x indicated by the received DCI, the terminal device may determine the k0, the mapping type, and the startsymbolandlength configuration value corresponding to the row x, in other words, the terminal device may know the information of k0, the mapping type of the PDSCH, and the startsymbolandlength configuration value, and may further determine the time domain resource for transmitting the PDSCH.

TABLE 1

It should be understood that table 1 above is only an exemplary table for providing one possible DCI resource indication, and the embodiments of the present application are not limited thereto.

Where k0 may represent the slot offset value between the DCI and the scheduled PDSCH, k0 is fixed to 0 for the mini-slot, i.e., the PDSCH is always concatenated with the corresponding DCI. For mini-slots, the mapping type is type B. For the mini-slot of 2/4/7 symbol, SLIV is 14 × (L-1) + S, where S is the absolute number of PDSCH starting symbol, and L is the number of mini-slot persistent symbols, i.e. 2/4/7 symbol.

The mapping type of PDSCH is different, the Cyclic Prefix (CP) is different, and its corresponding S, L combination is different. As shown in tables 2 and 3.

Regarding the mapping type, the mapping manner of the PDSCH or PUSCH in the time domain may include a first mapping manner and a second mapping manner, where the first mapping manner may be a mapping type a in the NR protocol, and the second mapping manner may be a mapping type b in the NR protocol. In a normal case, the mapping scheme of the PDSCH or PUSCH may be indicated by higher layer signaling, for example, Radio Resource Control (RRC) signaling.

As for the CP, normal CP (normal CP) and extended CP (extended CP) are included. One slot format is that 14 OFDM symbols are contained, and the CP of each OFDM symbol is a normal CP; one slot format is that 12 OFDM symbols are included, and the CP of each OFDM symbol is an extended CP; one slot format is to contain 7 OFDM symbols, each of which has a normal CP. It should be understood that the above examples are illustrative only and should not be construed as limiting the present application in any way.

TABLE 2

TABLE 3

The terminal device can determine the location of the transmission resource of the PDSCH from S, L.

As can be seen from fig. 8, for 2 symbols mini-slot, when it appears in symbols 1-2, 5-6, 8-9, and 12-13, L is unchanged, S is changed, and therefore, the time domain resource indication information in the DCI also needs to be updated. Therefore, the network device needs to prepare four different DCIs simultaneously to correspond to different possible sending locations or update the DCI indication information in real time according to the LBT result, and both of the above two methods have high requirements on the capability of the network device.

The embodiment of the application provides a method, by changing the time domain resource analysis mode in the DCI, the network equipment does not need to update the time domain indication information in the DCI when the mini-slot sending position is changed, and the resource overhead is saved.

Various embodiments provided herein will be described in detail below with reference to the accompanying drawings.

Fig. 9 is a schematic interaction diagram of a method 900 for receiving data and transmitting data according to an embodiment of the present application. Method 900 may include the following steps.

And 910, the terminal equipment receives indication information, and the indication information is used for indicating the time domain resource indication. Accordingly, the network device transmits the indication information to the terminal device.

In the embodiment of the present application, the following scheme may be included: the terminal equipment receives the indication information. And the terminal equipment determines the time domain resource of the downlink data according to the indication information. Specifically, the terminal device may determine the time domain resource of the PDSCH with a start symbol of the PDCCH and/or an end symbol of the PDCCH as reference points. For example, the indication information carries a symbol offset between the PDCCH (or a starting symbol of the PDCCH and/or an ending symbol of the PDCCH) and the PDSCH (or a starting symbol of the PDSCH and/or an ending symbol of the PDSCH). The terminal device receiving the PDCCH may determine a starting symbol of the PDCCH and/or an ending symbol of the PDCCH. Further, the terminal device may determine the resource occupied by the PDSCH according to the symbol offset carried in the indication information. That is, the terminal device determines a starting symbol of the PDSCH and/or an ending symbol of the PDSCH, and/or a duration.

The indication information may be carried in DCI, for example, and the network device may indicate information related to a time domain resource for transmitting data to the terminal device through the DCI, such as the indication manner shown in table 1. After receiving the DCI, the terminal device may determine a time domain resource for transmitting data, so that the terminal device may receive the data at a correct location.

In the following embodiments, the indication information is carried on the DCI, and the data is the PDSCH.

The time domain resource indication may represent a time domain resource for transmitting downlink data. In particular, the time domain resource indication comprises a SLIV. SLIV, a PDSCH Start and Length Indicator (SLIV), or may also be referred to as a PDSCH time domain resource Indicator, includes information of a relative position between time domain resources used for transmitting data and time domain resources used for transmitting DCI.

Optionally, the SLIV is used to indicate S and L, S represents a relative position between time domain resources used for transmitting PDSCH and time domain resources used for transmitting DCI, L represents a length of the time domain resources used for transmitting PDSCH, and S, L is an integer greater than or equal to 0.

S denotes a relative position between a starting position of time domain resources for transmitting PDSCH and time domain resources for transmitting DCI, and S is an integer greater than 0 or equal to 0.

In one possible implementation, S may represent the number of symbols (or symbol offset) between the starting position of the time domain resources used for transmitting PDSCH and the starting position of the time domain resources used for transmitting DCI. The terminal device may determine the starting position of the time domain resource for transmitting the PDSCH according to the starting position of the time domain resource for transmitting the DCI. For example, when S is 1 and the starting position of the time domain resource for transmitting DCI is symbol 0, the terminal device may determine that the starting position of the time domain resource for transmitting PDSCH is symbol 1.

In yet another possible implementation, S may represent the number of symbols between the starting position of the time domain resource for transmitting PDSCH and the ending position of the time domain resource for transmitting DCI. The terminal device may determine a starting position of the time domain resource for transmitting the PDSCH according to an ending position of the time domain resource for transmitting the DCI. For example, when S is 0 and the end position of the time domain resource used for transmitting DCI is symbol 2, the terminal device may determine that the start position of the time domain resource used for transmitting PDSCH is symbol 2.

In the embodiment of the present application, S represents the number of symbols between the starting positions of the time domain resources for transmitting the PDSCH and the time domain resources for transmitting the DCI. It should be understood that the manner in which S represents the number of symbols between the starting position of the time domain resource for transmitting PDSCH and the ending position of the time domain resource for transmitting DCI is also applicable to the present application embodiment.

Wherein L denotes a duration of time domain resources for transmitting the PDSCH, and L is an integer greater than 0 or equal to 0. L may take the values: 2-S, 5-S, 6-S, 7-S, 12-S, 13-S, or 14-S, etc., and the specific value of L depends on the number of persistent symbols of the DCI and whether the number of persistent symbols of other signals, which may be present, is half a slot or 1 slot (14 symbols), etc.

The manner in which the terminal device determines S and L will be described in detail below.

The network device indicates the information of S and L to the terminal device through DCI. In other words, the network device indicates the starting position and length of the time domain resources for transmitting the PDSCH to the terminal device through the DCI, so that the terminal device can know the position of the time domain resources for transmitting the PDSCH, i.e., when to start receiving the PDSCH and how long to receive the PDSCH.

The network device indicates the information of S and L to the terminal device through DCI. In a possible implementation manner, the network device indicates, to the terminal device, information of an SLIV through DCI, where the SLIV is used to indicate S and L. In other words, the terminal device parses the starting position and length of the time domain resource for transmitting the PDSCH according to the SLIV and the meaning of S and L; in another possible implementation manner, the network device indicates S and L to the terminal device through DCI, and the terminal device parses the starting position and length of the time domain resource used for transmitting the PDSCH according to S and L.

The following describes a manner for terminal equipment to resolve the location of the time-frequency resource in detail by taking the case that the time-domain resource indicator is SLIV as an example.

Optionally, before step 910, method 900 may further include step 901.

The network device determines the SLIV 901.

After the network device determines the SLIV, the network device may send a message carrying the SLIV to the terminal device, and after receiving the SLIV, the terminal device may parse a time domain resource location for transmitting the PDSCH, for example, the terminal device determines a location where the PDSCH starts to be received and a length where the PDSCH is received, and may then correctly receive data at the corresponding location.

And 920, the terminal equipment receives data based on the SLIV.

In other words, the terminal device receives the PDSCH based on the determined resource location for transmitting the PDSCH.

The manner in which the terminal device resolves the time domain resource location for transmitting PDSCH will be described in detail below.

Optionally, the terminal device receives second indication information, where the second indication information is used to indicate a relative position between S and the time domain resource used for transmitting the PDSCH and the time domain resource used for transmitting the DCI. The second indication information may also be understood as indicating a manner in which the terminal device resolves the time domain resource location for transmitting the PDSCH.

That is, the terminal device may determine the manner of resolving the time domain resource location according to the second indication information. As described above, the terminal device may obtain the startsymbolandlength configuration value through the indication of the DCI, and the SLIV may be obtained by calculating according to formula 1:

SLIV ═ 14 ═ L-1) + S formula 1

S is the sequence number of the PDSCH starting symbol (i.e., the starting position of the time domain resource used for transmitting PDSCH), and L is the number of symbols for transmitting PDSCH (i.e., the number of symbols for mini-slot persistence).

In this embodiment of the present application, the terminal device may at least resolve the time domain resource location in any one of the following manners.

In the embodiment 1, the meaning based on S is the relative position.

That is, S denotes a relative position between the time domain resources for transmitting PDSCH and the time domain resources for transmitting DCI, that is, S is not an absolute number but a number relative to a relative symbol of DCI, and the terminal device resolves the time domain resource position based on the relative position.

In the mode 2, the analysis is performed based on the meaning of S as an absolute position.

That is, S denotes an absolute number of a start symbol of the time domain resource for transmitting the PDSCH, and the terminal device resolves the time domain resource location based on the absolute location. As exemplified in connection with fig. 8. As in the case of starting position 1 in fig. 8, S is 1, i.e. the terminal device starts receiving PDSCH at symbol 1; also as in the case of starting position 2 in fig. 8, S is 3, i.e. the terminal device starts receiving PDSCH at symbol 3; also as in the case of starting position 3 in fig. 8, S is 5, i.e. the terminal device starts receiving PDSCH at symbol 5. It can be seen that S also varies when the starting symbol of the time domain resource used for transmitting PDSCH is different.

It should be understood that the

above modes

1 and 2 are only names for distinguishing and the names do not limit the protection scope of the embodiments of the present application.

The second indication information may be a display indication or an implicit indication, which is not limited to this. As described separately below.

In a possible implementation manner, the second indication information is a display indication.

Illustratively, a field, such as an x-bit field, may be added on the basis of the PDCCH order, and the way of the terminal device resolving the time domain resource location is indicated by the added field. Alternatively, it may be understood that the added field indicates whether S indicates a sequence number relative to a DCI symbol or an absolute sequence number of a start symbol for transmitting the PDSCH, and the terminal device may determine the start symbol for transmitting the PDSCH according to the meaning of S. The DCI after the field is added and the DCI before the field is added may be the same or different in length. Wherein x is an integer greater than 1 or equal to 1.

For example, a 1-bit field is utilized to indicate the manner in which the terminal device resolves the time domain resource location. Wherein, 0 is corresponding to terminal device adopting mode 1 to analyze the time domain resource position, and 1 is corresponding to terminal device adopting mode 2 to analyze the time domain resource position. Or, 1 is corresponding to the terminal device adopting the mode 1 to analyze the time domain resource position, and 0 is corresponding to the terminal device adopting the mode 2 to analyze the time domain resource position. That is, it is possible to indicate whether the meaning of S is a relative position or an absolute position using a 1-bit field. It should be understood how this is specifically indicated, and the examples of this application are not intended to be limiting.

In another possible implementation manner, the second indication information is an implicit indication.

Illustratively, mode 1 may be employed for mini-slots within one or more slots where the COT starts, or mode 2 may be employed for other locations of the COT, either mini-slots or full slots (full slots).

In other words, the terminal device may detect the position of the DCI, determine whether the mini-slot is located in one or more slots at the start of the COT according to the position of the DCI, and if so, the terminal device analyzes the time domain resource position in the mode 1; if not, the terminal equipment adopts the mode 2 to analyze the time domain resource position.

The manner in which the terminal device determines S and L in step 910 will be described in detail below.

This is illustrated in two cases.

Case 1: a case where a time domain resource occupied by a multicast common physical downlink control channel (GC PDCCH) and/or a time domain resource occupied by a terminal-equipment dedicated Physical Downlink Control Channel (PDCCH) includes a complete symbol.

Alternatively, it can also be understood that in this case, the PDCCH and the PDSCH do not occupy the same symbol, as shown in fig. 10, the CORESET occupies a complete one symbol. As described above, the CORESET can be used to carry scheduling information, and the CORESET occupies one complete symbol, that is, the PDCCH occupies one complete symbol.

In this case, S is greater than 1 or equal to 1.

Exemplarily, the starting sequence number S of the time domain resource for transmitting the PDSCH may be (T + Δ).

T denotes a length of a time domain resource for transmitting DCI, e.g., the number of persistent symbols; Δ represents an integer greater than 0 or equal to 0, for example Δ ═ 0, 1, 2, 3 … …. Δ may be predefined, configured by the network device, or indicated to the terminal device by the network device, which is not limited herein.

The following is exemplified with reference to three scenarios (1) to (3) in fig. 10.

For example, when the time domain resource for transmitting DCI is 1 symbol, i.e., T is 1, S is (1+ Δ). One possible implementation is that Δ is 0, when S is 1, i.e. the mini-slot starts from the second symbol, or, it can also be understood that the time domain resources for transmitting PDSCH start from the second symbol. As shown in (1) of fig. 10, the time domain resources for transmitting the PDSCH start from the second symbol. S may correspond to the duration of PDCCH, L is the number of symbols for transmitting PDSCH, and the duration of mini-slot is equal to the duration of PDCCH plus the duration of PDSCH, so the duration of mini-slot is (S + L). For example, for a mini-slot with a duration of 2 symbols, when the DCI lasts for 1 symbol, L takes a value of 1; for a mini-slot with a duration of 4 symbols, when the DCI lasts for 1 symbol, L takes a value of 3; for a mini-slot with a duration of 7 symbols, when the DCI lasts 1 symbol, L takes the value 6.

As another example, when the time domain resource for transmitting DCI is 2 symbols, i.e., T is 2, S is (2+ Δ). One possible implementation is that Δ is 0, when S is 2, i.e. the mini-slot starts from the third symbol, or, it can also be understood that the time domain resources for transmitting PDSCH starts from the third symbol. As shown in (2) of fig. 10, the time domain resource for transmitting the PDSCH starts from the third symbol. The mini-slot duration is (S + L). For example, for a mini-slot with a duration of 2 symbols, when the DCI lasts for 2 symbols, L takes a value of 0; for a mini-slot with a duration of 4 symbols, when the DCI lasts for 2 symbols, L takes a value of 2; for a mini-slot with a duration of 7 symbols, when the DCI lasts 2 symbols, L takes the value 5.

As another example, when the time domain resource for transmitting DCI is 3 symbols, i.e., T is 3, S is (3+ Δ). In one possible implementation, Δ is 0, and S is 3, i.e., the mini-slot starts from the fourth symbol, or it can be understood that the time domain resource for transmitting PDSCH starts from the fourth symbol. As shown in (3) of fig. 10, the time domain resource for transmitting the PDSCH starts from the fourth symbol. The mini-slot duration is (S + L). For example, for a mini-slot with a duration of 2 symbols, when the DCI lasts for 2 symbols, L takes a value of 0; for a mini-slot with a duration of 4 symbols, when the DCI lasts for 3 symbols, L takes a value of 1; for a mini-slot with a duration of 7 symbols, when the DCI lasts 3 symbols, L takes a value of 4.

The foregoing is exemplified by Δ being 0, and it should be understood that the embodiments of the present application are not limited thereto, for example, Δ may be greater than 0, that is, time domain resources for transmitting PDSCH and time domain resources for transmitting DCI may not be adjacent to each other. For example, a portion of the resources may be reserved between the time domain resources for transmitting PDSCH and the time domain resources for transmitting DCI for other signals, and so on.

In case 1, when the time domain resources for transmitting DCI are different, the PDSCH corresponding to the DCI is also at a different position accordingly. Since S represents the relative positional relationship between DCI and PDSCH, the value of S does not change, and thus there is no need to update DCI when a mini-slot occurs at a different location (i.e., the starting location for transmitting PDSCH is different).

Optionally, the terminal device may also determine frequency domain resources for transmitting PDSCH.

In one possible implementation, the frequency domain resources used for transmitting PDSCH may be: 1 or more frequency domain bandwidths of 20 MHz.

Given that LBT is typically performed at a granularity of 20MHz, its frequency domain resources may be pre-specified to fill 1 or more frequency domain bandwidths of 20 MHz. At this time, the frequency domain indication information in the DCI may be: frequency domain bandwidths of 1 or more 20MHz are indicated, so that the frequency domain indication information in the DCI may be simplified, or the frequency domain indication information originally used for indicating the frequency domain may be used for other LBT-related indications without using the frequency domain indication information.

Based on the above case 1, when the time domain resources for transmitting DCI are different, the PDSCH corresponding to DCI is also at a different position accordingly. Because S represents the relative position relationship between the DCI and the PDSCH, the value of S does not change, so that the DCI does not need to be updated when the mini-slot appears at different positions (namely, the initial positions for transmitting the PDSCH are different), further, the resource and signaling overhead can be saved, and the transmission delay is reduced.

Case 2: and the time domain resource occupied by the GC-PDCCH and/or the time domain resource occupied by the UE-specific PDCCH does not occupy the complete symbol.

Alternatively, in this case, the PDCCH and the PDSCH may be transmitted in the same symbol, that is, the time domain resource for transmitting the PDCCH and the time domain resource for transmitting the PDSCH may partially or entirely overlap. As shown in fig. 11, CORESET and PDSCH are transmitted in the same symbol.

Since the PDSCH is always transmitted starting from the first symbol, S is equal to 0 in this case. In this case, L is equal to the number of persistent symbols of the mini-slot. For example, for a mini-slot with a duration of 2 symbols, L takes the value of 2, i.e., S + L equals the number of 2 persistent symbols of the mini-slot. For another example, for a mini-slot with a duration of 4 symbols, L is 4, i.e., S + L equals to 4 of the number of persistent symbols of the mini-slot. For another example, for a mini-slot with a duration of 7 symbols, L is 7, i.e., S + L equals to the number of persistent symbols of the mini-slot of 7.

Optionally, in this case, the terminal device may acquire the first indication information to determine frequency domain resources for transmitting the PDSCH.

It can also be understood that, considering that the PDSCH and the PDCCH are transmitted in the same symbol, the terminal device needs to acquire the location of the frequency domain resource for transmitting the PDSCH, so as to acquire the time-frequency domain resource for transmitting the PDSCH.

The first indication information may be carried in DCI, that is, the network device may indicate, to the terminal device, frequency domain resources for transmitting the PDSCH through the DCI. For example, a field, such as a field with y bits, may be added on the basis of the PDCCH instruction, y is an integer greater than or equal to 1, and the terminal device is indicated by the added field, and in the same symbol, the frequency domain resource used for transmitting the PDSCH does not overlap with the frequency domain resource used for transmitting the PDCCH.

The first indication information may be a display indication or an implicit indication, which is not limited to this. The following description is made in conjunction with several scenarios.

In case 2, the frequency domain resources for transmitting the PDSCH do not overlap with the frequency domain resources for transmitting the PDCCH, which is exemplarily illustrated below with reference to 4 scenarios.

Scene 1: the UE-specific PDCCH is transmitted in the GC-PDCCH CORESET.

In this scenario, the first indication information may be used to indicate: the frequency domain resources used for transmitting the PDSCH do not overlap with the frequency domain resources occupied by the GC-PDCCH.

In a possible implementation manner, the first indication information may be a preset rule (e.g., a default rule or a protocol-specified rule), which may be understood as an implicit indication. That is, when the UE-specific PDCCH is transmitted in the GC-PDCCHCORESET, it may be specified that the transmission resources of the GC-PDCCH core are not used for PDSCH transmission. In this implementation, the terminal device obtaining the first indication information may be understood as that the terminal device determines, according to a preset rule, that the PDSCH is transmitted at a frequency domain position in the same symbol that is not overlapped with the transmission resource of the GC-PDCCH core set.

In another possible implementation manner, the first indication information may also be sent by the network device to the terminal device, and may be understood as a display indication. And the terminal equipment receives the first indication information, and determines the frequency domain position of the PDSCH, which is not overlapped with the transmission resource of the GC-PDCCH CORESET in the same symbol, to transmit the PDSCH according to the first indication information.

Scene 2: the UE-specific PDCCH is transmitted outside the GC-PDCCH CORESET.

In this scenario, the first indication information may be used to indicate: the frequency domain resources used for transmitting the PDSCH are not overlapped with the frequency domain resources occupied by the GC-PDCCH and the frequency domain resources occupied by the UE-specific PDCCH.

In a possible implementation manner, the first indication information may be a preset rule (e.g., a default rule or a protocol-specified rule), which may be understood as an implicit indication. That is, when the UE-specific PDCCH is transmitted outside the GC-pdcchcarrier, it may be specified that neither the transmission resource of the GC-PDCCH core nor the transmission resource of the UE-specific PDCCH is used for PDSCH transmission. In this implementation, the terminal device obtaining the first indication information may be understood as that the terminal device determines, according to a preset rule, that the PDSCH is transmitted at a frequency domain position that is not overlapped with the transmission resource of the GC-PDCCH core and is not overlapped with the transmission resource of the UE-specific PDCCH in the same symbol.

In another possible implementation manner, the first indication information may also be sent by the network device to the terminal device, and may be understood as a display indication. And the terminal equipment receives the first indication information, and determines the frequency domain position of the PDSCH, which is not overlapped with the transmission resource of the GC-PDCCH CORESET and is not overlapped with the transmission resource of the UE-specific PDCCH in the same symbol, to transmit the PDSCH according to the first indication information.

Scene 3: the transmission resource of the GC-PDCCH is fixed.

In this scenario, the first indication information may be used to indicate: the frequency domain resources used for transmitting the PDSCH are resources other than the frequency domain resources occupied by the GC-PDCCH.

In a possible implementation manner, the first indication information may be a preset rule (e.g., a default rule or a protocol-specified rule), which may be understood as an implicit indication. That is, when the transmission resource of the GC-PDCCH is fixed, it may be specified that the PDSCH can be transmitted on all resources other than the transmission resource of the GC-PDCCH. In this implementation manner, the terminal device obtaining the first indication information may be understood that the terminal device determines, according to a preset rule, that the transmission resource of the PDSCH is a resource other than the frequency domain resource occupied by the GC-PDCCH.

In another possible implementation manner, the first indication information may also be sent by the network device to the terminal device, and may be understood as a display indication. And the terminal equipment receives the first indication information and determines that the transmission resources of the PDSCH are resources except the frequency domain resources occupied by the GC-PDCCH according to the first indication information.

In this scenario, the transmission resource of the GC-PDCCH may be indicated to the terminal device by the network device, or may be agreed by the terminal device and the network device, which is not limited to this.

Scene 4: no GC-PDCCH is transmitted.

In this scenario, the first indication information may be used to indicate: the frequency domain resources used for transmitting the PDSCH do not overlap with the frequency domain resources occupied by the UE-specific PDCCH.

In a possible implementation manner, the first indication information may be a preset rule (e.g., a default rule or a protocol-specified rule), which may be understood as an implicit indication. That is, when the GC-PDCCH is not transmitted, it can be specified that the transmission resource of the UE-specific PDCCH is not used for PDSCH transmission. In this implementation, the terminal device obtaining the first indication information may be understood as that the terminal device determines, according to a preset rule, that the PDSCH is transmitted at a frequency domain position in the same symbol that is not overlapped with the transmission resource of the UE-specific PDCCH.

In another possible implementation manner, the first indication information may also be sent by the network device to the terminal device, and may be understood as a display indication. And the terminal equipment receives the first indication information, and determines the frequency domain position of the PDSCH, which is not overlapped with the transmission resource of the UE-specific PDCCH in the same symbol, to transmit the PDSCH according to the first indication information.

Optionally, in this scenario, the UE-specific PDCCH may further include first indication information indicating that no GC-PDCCH is transmitted.

The manner in which the terminal device determines the frequency domain resources of the PDSCH in case 2 is exemplarily described above, and it should be understood that the embodiment of the present application is not limited thereto, and any manner that can enable the terminal device to determine the frequency domain resources of the PDSCH falls within the scope of the embodiment of the present application. For example, the network device may indicate a relative position between the frequency domain resources of the terminal device PDSCH and the frequency domain resources of the UE-specific PDCCH, based on which the terminal device may also determine the frequency domain resources of the PDSCH.

Based on the above situation 2, when the mini-slot appears at different positions in the slot, the DCI time domain indication information does not need to be updated, so that the signaling overhead can be saved. In addition, in the above case 2, a manner of performing rate matching when the PDSCH and the PDCCH are carried on the same symbol is also provided, that is, the time domain resource for transmitting the PDSCH can be determined based on the frequency domain resource analysis method.

Optionally, the terminal device may determine the location of the time-frequency resources for transmitting the PDSCH according to one or more of the following: time-frequency resources for transmitting a Synchronization Signal Block (SSB), time-frequency resources for transmitting a channel state information-reference signal (CSI-RS), time-frequency resources for transmitting a paging (paging), or time-frequency resources for demodulating a demodulation reference signal (DMRS) of the PDSCH.

The following takes PDSCH as the Remaining Minimum System Information (RMSI) PDSCH as an example, and is exemplarily described with reference to fig. 12 to 14.

For different subcarrier spacing (SCS), e.g., 15kHz and 30kHz, the corresponding symbol lengths are different. For example, a RMSI CORESET corresponding to a subcarrier spacing of 15KHz typically occupies 48 RBs in the frequency domain and 1 symbol in the time domain; the corresponding RMSI CORESET with a sub-carrier spacing of 30KHz typically occupies 96 RBs in the frequency domain and 2 symbols in the time domain. In addition, in the frequency domain bandwidth of 20MHz, a 15KHz or 30KHz subcarrier may correspond to 51 usable subcarriers or 106 usable subcarriers.

First, a method of transmitting RMSI PDSCH, RMSI CORESET, SSB will be described with reference to FIGS. 12 and 13.

The SSB is introduced first, and in some cases, the SSB may also be referred to as a synchronization signal/physical broadcast channel block (SS/PBCH block). And (3) SSB: one SSB may consist of 4 OFDM symbols in the time domain, and one SSB may consist of 240 consecutive subcarriers, i.e., 20 consecutive RBs, in the frequency domain, for example.

The SSB may be understood as a block of resources for transmitting the SS and/or the PBCH. The network device may transmit the PBCH and the synchronization signal on the resource, and may also transmit only the PBCH or only the synchronization signal within the resource. The synchronization signal may include a Primary Synchronization Signal (PSS) and a Secondary Synchronization Signal (SSS).

In a timeslot, SSB may occupy

symbols

2, 3, 4, 5, 8, 9, 10, 11, and 9, 10, 11, 12, as shown in fig. 12 and 13.

It should be noted that fig. 12 and 13 are only illustrated by symbols used for facilitating understanding of SSB, and should not be construed as limiting the present application. It should be understood that the free-fill portion in fig. 13 may be used for transmitting uplink data and/or downlink data, which is not limited thereto.

As shown in fig. 12, SSBs and RMSI PDSCH may coexist in the same symbol, as shown by symbol {2, 3, 4, 5} in fig. 12 (1); or, the SSBs, RMSI PDSCH, and CSI-RS may coexist in the same symbol, such as symbol {8, 9, 10, 11} shown in (1) in fig. 12 or symbol {9, 10, 11, 12} shown in (2) in fig. 12. As shown in fig. 13, SSBs and RMSI PDSCH may coexist with the same symbol, such as the

symbols

2, 3, 4, 5 shown in fig. 13; or, the SSBs, RMSI PDSCH, and CSI-RS may coexist in the same symbol, such as the

symbol

8, 9, 10, 11 shown in fig. 13. That is, the transmission resources of the SSBs, RMSI PDSCH, CSI-RS may overlap. In this case, the terminal device determines RMSI PDSCH the transmission resource, considering the transmission resource of the SSB, CSI-RS, etc., that is, needs to perform rate matching. Wherein the transmission resources comprise time domain resources and/or frequency domain resources. The following is an exemplary illustration in terms of time domain resources and frequency domain resources.

Frequency domain resources

This is exemplified in connection with the case shown in (1) in fig. 12.

As shown in (1) in fig. 12, SSB and RMSI PDSCH coexist under the

same notation

2, 3, 4, 5. Then the frequency domain resources used for transmission of PDSCH are resources other than those used for transmission of SSB on

symbols

2, 3, 4, 5. As shown in (1) in fig. 12, frequency domain resources used for transmission of PDSCH do not overlap with frequency domain resources used for transmission of PSS, PBCH, and SSS. In other words, the frequency domain resources used for transmission of the PDSCH are frequency domain resources other than those used for transmission of the PSS, PBCH, and SSS. Alternatively, it can also be understood that for a segment of frequency domain resources, the frequency domain resources used for transmitting PDSCH are frequency domain resources on the segment of frequency domain resources other than the frequency domain resources used for transmitting PSS, PBCH, and SSS.

As shown in (1) in fig. 12, SSB and RMSI PDSCH coexist under the same symbol {8, 9, 10, 11 }. Then on the

symbols

8, 9, 10, 11, the frequency domain resources used for transmitting PDSCH are resources other than the frequency domain resources used for transmitting SSB. As shown in (1) in fig. 12, frequency domain resources for transmitting PDSCH do not overlap with frequency domain resources for transmitting PSS, PBCH, and SSS. In other words, the frequency domain resources used for transmission of the PDSCH are frequency domain resources other than those used for transmission of the PSS, PBCH, and SSS. Alternatively, it can also be understood that, for a certain segment of frequency domain resources, the frequency domain resources used for transmitting the PDSCH are frequency domain resources on the segment of frequency domain resources except for the frequency domain resources used for transmitting the PSS, the PBCH, and the SSS.

The frequency domain resource for transmitting the SSB is fixed, so the network device may not indicate to the terminal device.

Time domain resources

In one possible scenario, a maximum of 2 SSBs and corresponding RMSIs may be sent in a slot. A Discovery Reference Signal (DRS) block, which consists of one SSB and a corresponding RMSI, may have a duration of 7 symbols. RMSI PDSCH may occupy 5 symbols or 6 symbols when 1 symbol or 2 symbols are used to transmit RMSI CORESET. Alternatively, RMSI PDSCH may be carried on 5 symbols or 6 symbols when RMSI CORESET is carried on 1 symbol or 2 symbols. In this case, a mini-slot of length 5 symbols and/or a mini-slot of length 6 symbols may be supported in the unlicensed communication system.

It should be understood that the above description is only exemplary, and the embodiments of the present application are not limited thereto.

This is explained below in conjunction with two cases.

Case a: RMSI PDSCH are not transmitted at RMSI PDCCH (as may be noted as CORESET 0).

Similar to the case of fig. 10, the time domain resource indication manner of RMSI PDSCH at this time can refer to case 1 described above, for example, the starting sequence number S of the time domain resource for transmitting PDSCH is greater than 0. Specifically, reference may be made to the description of case 1, which is not described herein again.

RMSI PDSCH may coexist with SSB, CSI-RS, paging, etc. channels or signals on certain symbols, as shown in FIG. 12. The terminal device determines RMSI PDSCH the transmission resources considering the transmission resources of the SSB, CSI-RS, etc. The time-frequency resource for transmitting the SSB is fixed, and therefore, no indication is required. Regarding the time-frequency resources for transmitting CSI-RS, paging, the network device may indicate, through separate signaling, or through SSB (or PBCH in SSB) or RMSI core set, whether the resources for transmitting CSI-RS, paging by the terminal device exist, and a specific time-domain location.

In this case, L may take the values of: the specific value of L is determined by the number of continuous symbols of RMSI, such as half slot or 1 slot (14 symbols), and possible channel configurations such as CSI-RS and paging.

Illustratively, the time-frequency resources for transmission RMSI PDSCH may be determined from the time-frequency resources for transmission of the CSI-RS.

For example, the time domain resources used for transmission RMSI PDSCH and the time domain resources used for transmission of the CSI-RS do not overlap. Similar to the case of fig. 10, such as when the RMSI core lasts for 1 symbol, 2 nd symbol is used for transmission of CSI-RS, RMSI PDSCH may be made to be carried over one or more of the 3 rd symbol, or the 4 th symbol, or the 5 th symbol, or the 6 th symbol.

As another example, the time domain resources used for transmission RMSI PDSCH and the time domain resources used for transmission of the CSI-RS overlap. Then the frequency domain resources used for transmission RMSI PDSCH and the frequency domain resources used for transmission of the CSI-RS do not overlap, and after the terminal device acquires the frequency domain resources used for transmission of the CSI-RS, the frequency domain resources used for transmission RMSI PDSCH may be parsed at resources other than the frequency domain resources used for transmission of the CSI-RS.

Illustratively, the time domain resources for transmission RMSI PDSCH may be determined based on the time domain resources for transmission paging.

For example, the time domain resources used for transmission RMSI PDSCH and the time domain resources used for transmission paging do not overlap. For example, when the RMSI core lasts for 1 symbol, and the 2 nd symbol is used for paging transmission, RMSI PDSCH may be carried over one or more of the 3 rd symbol, or the 4 th symbol, or the 5 th symbol, or the 6 th symbol.

As another example, the time domain resources used for transmission RMSI PDSCH and the time domain resources used for transmission paging overlap. Then the frequency domain resources used for transmission RMSI PDSCH and the frequency domain resources used for transmission paging do not overlap, and after the terminal device acquires the frequency domain resources used for transmission paging, the frequency domain resources used for transmission RMSI PDSCH may be parsed at resources other than the frequency domain resources used for transmission paging.

Illustratively, the time domain resources for transmission RMSI PDSCH may be determined from the time domain resources for transmission SSBs.

For example, the time domain resources used for transmission RMSI PDSCH and the time domain resources used for transmission SSBs do not overlap.

Case B: RMSI PDSCH at RMSI PDCCH (CORESET 0).

In the time domain resource indicating manner of RMSI PDSCH, reference may be made to the above-mentioned case 2, that is, the starting sequence number S of the time domain resource for transmitting the PDSCH is 0. Reference may be made specifically to the description of case 2.

Similarly, RMSI PDSCH may also coexist with SSB, CSI-RS, paging, and other channels or signals on some symbols, where SSB time-frequency resources are fixed and do not need to be indicated, and whether CSI-RS and paging resources exist and a specific time-domain location may be indicated to the terminal device, for example, by indicating in SSB or RMSI core, the terminal device obtains RMSI PDSCH a time-frequency resource location actually occupied according to the above information.

In this case, L may take the values: the specific value of 7-S, 14-S, 5-S, 6-S, 12-S, or 13-S, L depends on RMSI PDCCH whether the number of continuous symbols is half slot or 1 slot (14 symbols) and possible channel configurations such as CSI-RS and paging.

Optionally, in this case, the terminal device may obtain the third indication information to determine frequency domain resources for transmission RMSIPDSCH.

That is, in this case, the terminal device also needs to know RMSI PDSCH the frequency domain resources that occur in the first symbol and/or the second symbol (i.e., RMSI PDSCH and RMSI CORESET coexistence symbol).

The terminal device obtains the third indication information and determines RMSI PDSCH a location of the frequency domain resource for transmission based on the third indication information. The third indication information, or the information of the frequency domain resource, may be predefined, such as may be directly given by a standard; alternatively, the indication may be made in DCI or PBCH.

Illustratively, the terminal device may determine the frequency domain resources for transmission RMSI PDSCH from the frequency domain resources for transmission of the RMSI CORESET.

For example, the third indication information may indicate that the frequency domain resources used for transmission RMSI PDSCH do not overlap with the frequency domain resources used for transmission of the RMSICORESET, and then, after learning the frequency domain resources used for transmission of the RMSI CORESET, the terminal device may determine, according to the third indication information, that the frequency domain resources used for transmission RMSI PDSCH do not overlap with the frequency domain resources used for transmission of the RMSI CORESET, that is, the frequency domain resources used for transmission RMSI PDSCH are resources other than the frequency domain resources used for transmission of the RMSI CORESET.

Illustratively, the terminal device may determine the frequency domain resources for transmission RMSI PDSCH based on the frequency domain resources for transmission of the RMSI CORESET and the frequency domain resources for transmission of the SSB.

For example, the third indication information may indicate that the frequency domain resources used for transmission RMSI PDSCH do not overlap with the frequency domain resources used for transmission SSB and the frequency domain resources used for transmission RMSI CORESET, and then, after learning the frequency domain resources used for transmission SSB and the frequency domain resources used for transmission RMSI CORESET, the terminal device may determine, according to the third indication information, that the frequency domain resources used for transmission RMSI PDSCH do not overlap with the frequency domain resources used for transmission SSB and the frequency domain resources used for transmission RMSI CORESET, that is, the frequency domain resources used for transmission RMSI PDSCH are the frequency domain resources used for transmission RMSI CORESET and the resources other than the frequency domain resources used for transmission SSB.

Illustratively, the terminal device may determine the frequency domain resources for transmission RMSI PDSCH based on the frequency domain resources for transmission of the RMSI CORESET and the frequency domain resources for transmission of the CSI-RS and/or paging.

For example, the third indication information may indicate that the frequency domain resource used for transmitting RMSI PDSCH does not overlap with the frequency domain resource used for transmitting the CSI-RS and/or paging and the frequency domain resource used for transmitting the RMSI CORESET, and then after acquiring the frequency domain resource used for transmitting the CSI-RS and/or paging and the frequency domain resource used for transmitting the RMSI CORESET, the terminal device may determine, according to the third indication information, that the frequency domain resource used for transmitting RMSI PDSCH does not overlap with the frequency domain resource used for transmitting the CSI-RS and/or paging and the frequency domain resource used for transmitting the RMSI CORESET, that is, the frequency domain resource used for transmitting RMSI PDSCH is a frequency domain resource used for transmitting the RMSI CORESET and a resource other than the frequency domain resource used for transmitting the CSI-RS and/or paging.

The manner in which the terminal device determines the frequency domain resources for transmission RMSI PDSCH in case B is exemplarily described above, and it should be understood that the embodiment of the present application is not limited thereto, and any manner that may enable the terminal device to determine the frequency domain resources for transmission RMSIPDSCH falls within the scope of the embodiment of the present application. For example, the network device may indicate a relative position between the frequency domain resources of terminal device RMSI PDSCH and the frequency domain resources of RMSI CORESET, based on which the terminal device may also determine RMSI PDSCH the frequency domain resources.

Optionally, the terminal device may also determine frequency domain resources for transmission RMSI PDSCH according to time-frequency resources of a demodulation reference signal DMRS used for demodulating the PDSCH.

The mapping scheme of the demodulation reference signal (PDSCH DMRS) for the physical shared channel includes, for example, mapping type a and mapping type b. PDSCH DMRS for mapping type B is shown in FIG. 13. There are many possible situations for the location of PDSCH DMRS, as shown in FIG. 13. Fig. 13 (1) shows exemplary PDSCH DMRS positions for single-symbol (single-symbol) and fig. 13 (2) shows exemplary PDSCH DMRS positions for double-symbol (double-symbol).

For the PDSCH with type B mapping, if the PDSCH is transmitted on the same symbol as the core set configured for the GC-PDCCH, the PDSCH will be rate-matched according to the configured core set. Furthermore, when the time domain resources or frequency resources allocated for the GC-PDCCH are fixed resources, a subset of CORESET (if present) will be punctured for PDSCH allocation. In addition, if the PDSCH is transmitted on the same symbol as the CORESET configured for the GC-PDCCH, the DMRS for demodulating the PDSCH is not transmitted on the symbol. The time position of the DMRS for demodulating the PDSCH will be shifted backward (or transposed to other symbols). For example, when a 1-symbol CORESET is configured for a 2-symbol mini-slot, the DMRS for demodulating the PDSCH may be transmitted on the second symbol of the mini-slot; when a 1-symbol or 2-symbol CORESET is configured for 4 symbols, mini-slot, the DMRS for demodulating the PDSCH may be transmitted on the second or third symbol of the mini-slot.

For RMSI PDSCH with duration of 2, 4, 7 symbols, the 1 st symbol may all be used to carry the RMSI CORESET, when RMSI CORESET lasts 1 or 2 symbols, PDSCH DMRS may be carried with the 2 nd and/or 7 th symbol; when the 2 nd symbol is used for CSI-RS or paging transmission, PDSCH DMRS may be carried in the 3 rd symbol, or the 4 th symbol, or the 5 th symbol, or the 6 th symbol. Given that the above symbols may be used to carry SSBs at the same time, in this case, the frequency domain resources used for transmission PDSCH DMRS do not overlap with the frequency domain resources used for transmission SSBs, that is, PDSCH DMRS is carried on subcarriers whose symbols do not overlap with the SSBs frequency domain.

When the terminal equipment performs downlink channel estimation, the PBCH DMRS and PDSCH DMRS can be jointly used for channel estimation. When PDSCH DMRS is carried in the 2 nd symbol, the 7 th symbol, or another symbol, and the symbol is also used for RMSI PDSCH or paging transmission (the frequency domain resources for the two transmissions do not coincide), rate matching is required to be performed when parsing RMSI PDSCH or paging, specifically, a frequency domain subcarrier corresponding to PDSCH DMRS may be removed or omitted, that is, the frequency domain resource used for transmitting RMSI PDSCH or the frequency domain resource used for transmitting paging is a resource other than the frequency domain resource used for transmitting PDSCH DMRS.

In the existing NR standard, RMSI PDSCH supports continuous RB mapping in the frequency domain and does not support rate matching operations for SSBs. In unlicensed communication systems, it is desirable to consider RMSI PDSCH rate matching SSBs because the joint transmission of the two may compress the time domain duration of the overall transmission signal. When DRS transmission duration is less than 1ms, a higher priority LBT (e.g., CAT2, i.e., 2 symbols mini-slot) may be employed, increasing its probability of successful transmission. When RMSI PDSCH rate-matches the SSBs, the DMRS transmission time for demodulating PDSCH may be offset because it cannot occupy the same symbol as the commonly transmitted SSBs. When the SSB transmission mode is as in (2) of fig. 12, RMSI PDSCH DMRS may transmit on symbol 1 or symbol 6 (corresponding to the 1 st SSB in a slot) or symbol 8 or symbol 13 (corresponding to the 12 th SSB in a slot), depending on whether the configured CORESET is 1 or 2 symbols.

In the existing NR standard, for the mini slots of 4 symbols and 7 symbols, the first DMRS is not allowed to occur at the 4 th symbol and after the 4 th symbol. For an unauthorized communication system, the restriction needs to be removed, and as mentioned above, RMSI PDSCHDMRS may appear at either symbol 6 or symbol 13. Another possible solution is that the terminal device may use PBCH DMRS and RMSI PDSCH DMRS sent on symbol 2 or symbol 9 jointly for channel measurements (e.g., channel estimation for the entire 20MHz bandwidth) for demodulation of RMSI PDSCH. In this case RMSI PDSCH may be transmitted on symbol 1, symbol 6, symbol 8, symbol 13.

When RMSI PDSCH transmissions last 5 or 6 symbols, an extra combination of S and L needs to be added, e.g., S remains unchanged. L may take any of 2,4,5,6, and 7.

Based on the above scheme, when RMSI PDSCH appears at different positions in the slot, updating of DCI time domain indication information is not required, and a method for how the terminal device analyzes PDSCH frequency domain resources on a symbol where RMSI PDSCH and RMSI CORESET coexist according to different situations, and a way for how to analyze SSB and possibly existing CSI-RS, paging and other signals, that is, how to perform rate matching, are provided, so that the terminal device can know time-frequency resources for transmitting PDSCH and further accurately receive data.

It should be understood that the above embodiments have been described by taking PDSCH as the data as an example, and it should be understood that the embodiments of the present application can also be applied to other types of data. It should also be understood that the above symbols may be replaced with OFDM symbols.

Based on the above description, in the scheme provided in this embodiment of the present application, the network device indicates, to the terminal device through the DCI, the SLIV, where the SLIV includes information of a relative position between a time domain resource used for transmitting data and a time domain resource used for transmitting the DCI, so that, regardless of where LBT of the network device is successful, or when an initial position of the time domain resource used for transmitting data occurs at a different time domain position, the time domain resource indication information in the DCI does not need to be updated, because the SLIV indicates the relative position between the time domain resource used for transmitting data and the time domain resource used for transmitting the DCI, waste of resources can be avoided, requirements on the network device are reduced, and it can be ensured that the terminal device correctly obtains a resource position for transmitting data, and then correctly receives data, and ensures data transmission performance.

The various embodiments described herein may be implemented as stand-alone solutions or combined in accordance with inherent logic and are intended to fall within the scope of the present application.

It is to be understood that, in the above-described method embodiments, the method and the operation implemented by the terminal device may also be implemented by a component (e.g., a chip or a circuit) available for the terminal device, and the method and the operation implemented by the network device may also be implemented by a component (e.g., a chip or a circuit) available for the network device.

The above description mainly introduces the scheme provided by the embodiments of the present application from various interaction perspectives. It is understood that each network element, for example, the transmitting end device or the receiving end device, includes a corresponding hardware structure and/or software module for performing each function in order to implement the above functions. Those of skill in the art would appreciate that the various illustrative components and algorithm steps described in connection with the embodiments disclosed herein may be implemented as hardware or combinations of hardware and computer software. Whether a function is performed as hardware or computer software drives hardware depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

In the embodiment of the present application, the functional modules may be divided according to the above method example for the transmitting end device or the receiving end device, for example, each functional module may be divided corresponding to each function, or two or more functions may be integrated into one processing module. The integrated module can be realized in a form of hardware, and can also be realized in a form of a software functional module. It should be noted that the division of the modules in the embodiment of the present application is schematic, and is only a logic function division, and there may be another division manner in actual implementation. The following description will be given by taking an example in which each functional module is divided by using a corresponding function.

The method provided by the embodiment of the present application is described in detail above with reference to fig. 9 to 14. Hereinafter, a communication device according to an embodiment of the present application will be described in detail with reference to fig. 15 to 18. It should be understood that the description of the apparatus embodiments corresponds to the description of the method embodiments, and therefore, for brevity, details are not repeated here, since the details that are not described in detail may be referred to the above method embodiments.

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

In the embodiment of the present application, the functional modules may be divided according to the above method example for the transmitting end device or the receiving end device, for example, each functional module may be divided corresponding to each function, or two or more functions may be integrated into one processing module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. It should be noted that the division of the modules in the embodiment of the present application is schematic, and is only a logic function division, and there may be another division manner in actual implementation. The following description will be given taking the example of dividing each functional module corresponding to each function.

Fig. 15 is a schematic block diagram of a communication device provided in an embodiment of the present application. As shown, the communication device 1500 may include a communication unit 1510 and a processing unit 1520. The communication unit 1510 may communicate with the outside, and the processing unit 1520 is used to perform data processing. The communication unit 1510 may also be referred to as a communication interface or a transceiving unit.

In one possible design, the communication apparatus 1500 may implement the steps or processes executed by the terminal device corresponding to the above method embodiment, for example, the steps or processes may be executed by the terminal device, or a chip or a circuit configured in the terminal device. At this time, the communication apparatus 1500 may be referred to as a terminal device. The communication unit 1510 is configured to perform transceiving related operations on the terminal device side in the above method embodiments, and the processing unit 1520 is configured to perform processing related operations of the terminal device in the above method embodiments.

In one possible implementation, the communication unit 1510 is configured to: receiving Downlink Control Information (DCI), wherein the DCI is used for indicating a time domain resource indication, and the time domain resource indication comprises information of a relative position between a time domain resource used for transmitting data and the time domain resource used for transmitting the DCI; the processing unit 1520 is to: determining a time domain resource indication; the communication unit 1510 is further configured to: data is received based on the time domain resource indication.

Optionally, the time domain resource indicator indicates S and L, S represents the number of symbols between the time domain resource for transmitting data and the starting position of the time domain resource for transmitting DCI, L represents the length of the time domain resource for transmitting data, and S, L is an integer greater than 0 or equal to 0.

Optionally, a value of S is any one of the following: t, T +1, T + 2; wherein T represents the number of symbols occupied by time domain resources for transmitting DCI, and is an integer greater than 1 or equal to 1.

Optionally, the communication unit 1510 is further configured to: first indication information is acquired, wherein the first indication information is used for indicating information of frequency domain resources used for transmitting data.

Optionally, the first indication information is used to indicate any one of the following: the frequency domain resources used for transmitting data are not overlapped with the frequency domain resources occupied by the GC-PDCCH; or, the frequency domain resources used for transmitting data do not overlap with the frequency domain resources occupied by the PDCCH dedicated to the communication apparatus 1500; or, the frequency domain resource used for transmitting data is not overlapped with the frequency domain resource occupied by the GC-PDCCH and the frequency domain resource occupied by the PDCCH dedicated to the communication apparatus 1500; or, the frequency domain resource used for transmitting the data is a resource other than the frequency domain resource occupied by the GC-PDCCH, and the first indication information includes information of the frequency domain resource occupied by the GC-PDCCH; or, the frequency domain resources used for transmitting data do not overlap with the frequency domain resources occupied by the communication apparatus 1500-specific PDCCH, and the communication apparatus 1500-specific PDCCH includes indication information indicating that the GC-PDCCH is not transmitted.

Optionally, the communication unit 1510 is further configured to: and receiving second indication information, wherein the second indication information is used for indicating the number of symbols between the time domain resource used for transmitting the data and the starting position of the time domain resource used for transmitting the DCI.

Optionally, the processing unit 1520 is further configured to: determining a location of time-frequency resources for transmitting data according to one or more of: the time-frequency resources are used for transmitting a synchronization signal block, the time-frequency resources are used for transmitting a channel state information reference signal CSI-RS, the time-frequency resources are used for transmitting a paging, or the time-frequency resources are used for demodulating a demodulation reference signal DMRS of data.

The communication apparatus 1500 may implement steps or flows corresponding to those executed by the terminal device in the method 900 according to the embodiment of the present application, and the communication apparatus 1500 may include a unit for executing the method executed by the terminal device in the method 900 in fig. 9. Also, the units and other operations and/or functions described above in the communication apparatus 1500 are respectively for implementing the corresponding flows of the method 900 in fig. 9.

When the communications apparatus 1500 is configured to perform the method 900 in fig. 9, the communications unit 1510 may be configured to perform steps 910 and 920 in the method 900, and the processing unit 1520 may be configured to perform steps of the terminal device in the method 900 to determine the location of the time-frequency resource.

It should be understood that the specific processes of the units for executing the corresponding steps are already described in detail in the above method embodiments, and for brevity, detailed descriptions thereof are omitted here.

It is further understood that the communication unit 1510 in the communication apparatus 1500 may be implemented by the transceiver 1710 in the terminal device 1700 shown in fig. 17, and the processing unit 1520 in the communication apparatus 1500 may be implemented by the processor 1720 in the terminal device 1700 shown in fig. 17. Wherein the transceiver may comprise a transmitter and/or a receiver, respectively, performing the functions of the transmitting unit and the receiving unit.

It should also be understood that the communication unit 1510 in the communication device 1500 may also be an input/output interface.

In another possible design, the communication apparatus 1500 may implement the steps or processes performed by the network device corresponding to the above method embodiments, for example, the steps or processes may be implemented by the network device or a chip or a circuit configured in the network device. At this time, the communication apparatus 1500 may be referred to as a network device. The communication unit 1510 is configured to perform transceiving related operations on the network device side in the above method embodiments, and the processing unit 1520 is configured to perform processing related operations of the network device in the above method embodiments.

In one possible implementation, the processing unit 1520 is configured to: determining a time domain resource indication; the communication unit 1510 is configured to: and sending DCI to the terminal equipment, wherein the DCI comprises information of time domain resource indication, and the time domain resource indication comprises information of relative position between the time domain resource used for transmitting data and the time domain resource used for transmitting the DCI.

Optionally, the communication unit 1510 is further configured to: and sending first indication information to the terminal equipment, wherein the first indication information is used for indicating information of frequency domain resources used for transmitting data.

Optionally, the first indication information is used to indicate any one of the following: the frequency domain resources used for transmitting data are not overlapped with the frequency domain resources occupied by the GC-PDCCH; or, the frequency domain resource used for transmitting data is not overlapped with the frequency domain resource occupied by the terminal equipment dedicated PDCCH; or, the frequency domain resource used for transmitting data is not overlapped with the frequency domain resource occupied by the GC-PDCCH and the frequency domain resource occupied by the special PDCCH of the terminal equipment; or, the frequency domain resource used for transmitting the data is a resource other than the frequency domain resource occupied by the GC-PDCCH, and the first indication information includes information of the frequency domain resource occupied by the GC-PDCCH; or, the frequency domain resource used for transmitting the data does not overlap with the frequency domain resource occupied by the terminal device specific PDCCH, and the terminal device specific PDCCH includes indication information for indicating that the GC-PDCCH is not transmitted.

Optionally, the communication unit 1510 is further configured to: and sending second indication information to the terminal equipment, wherein the second indication information is used for indicating the number of symbols between the time domain resource used for transmitting the data and the starting position of the time domain resource used for transmitting the DCI.

The communication apparatus 1500 may implement steps or flows corresponding to those performed by the network device in the method 900 according to the embodiment of the present application, and the communication apparatus 1500 may include a unit for performing the method performed by the network device in the method 900 in fig. 9. Also, the units and other operations and/or functions described above in the communication apparatus 1500 are respectively for implementing the corresponding flows of the method 900 in fig. 9.

Wherein, when the communication apparatus 1500 is configured to execute the method 900 in fig. 9, the communication unit 1510 may be configured to execute the steps 910 and 920 in the method 900, and the processing unit 1520 may be configured to execute the step 901 in the method 900.

It is to be further understood that the communication unit in the communication apparatus 1500 may be implemented by the transceiver 1810 in the network device 1800 shown in fig. 17, and the processing unit 1520 in the communication apparatus 1500 may be implemented by the processor 1820 in the network device 1800 shown in fig. 18.

It should also be understood that the communication unit 1510 in the communication device 1500 may also be an input/output interface. Wherein the transceiver may comprise a transmitter and/or a receiver, respectively implementing the functions of the transmitting unit and the receiving unit.

Fig. 16 is a further schematic block diagram of a communication device 1600 provided in an embodiment of the present application. As shown, the communication device 1600 includes the transceiver 1610, the processor 1620 and the memory 1630, wherein the memory 1630 stores programs, the processor 1620 is configured to execute the programs stored in the memory 1630, the execution of the programs stored in the memory 1630 enables the processor 1620 to perform the relevant processing steps in the above method embodiments, and the execution of the programs stored in the memory 1630 enables the processor 1620 to control the transceiver 1610 to perform the relevant transceiving steps in the above method embodiments.

As an implementation, the communication device 1600 is configured to perform the actions performed by the terminal device in the above method embodiment, at this time, the execution of the program stored in the memory 1630 causes the processor 1620 to perform the processing steps on the terminal device side in the above method embodiment, and the execution of the program stored in the memory 1630 causes the processor 1620 to control the transceiver 1610 to perform the receiving and transmitting steps on the terminal device side in the above method embodiment.

As another implementation, the communication apparatus 1600 is configured to perform the operations performed by the network device in the foregoing method embodiments, in this case, the execution of the program stored in the memory 1630 causes the processor 1620 to perform the processing steps on the network device side in the foregoing method embodiments, and the execution of the program stored in the memory 1630 causes the processor 1620 to control the transceiver 1610 to perform the receiving and transmitting steps on the network device side in the foregoing method embodiments.

The embodiment of the present application further provides a communication apparatus 1700, where the communication apparatus 1700 may be a terminal device or a chip. The communication apparatus 1700 may be configured to perform the actions performed by the terminal device in the above method embodiments.

When the communication apparatus 1700 is a terminal device, fig. 17 shows a simplified structural diagram of the terminal device. For easy understanding and convenience of illustration, in fig. 17, the terminal device is exemplified by a mobile phone. As shown in fig. 17, the terminal device includes a processor, a memory, a radio frequency circuit, an antenna, and an input-output device. The processor is mainly used for processing communication protocols and communication data, controlling the terminal equipment, executing software programs, processing data of the software programs and the like. The memory is mainly used for storing software programs and data. The radio frequency circuit is mainly used for converting baseband signals and radio frequency signals and processing the radio frequency signals. The antenna is mainly used for receiving and transmitting radio frequency signals in the form of electromagnetic waves. Input and output devices, such as touch screens, display screens, keyboards, etc., are used primarily for receiving data input by a user and for outputting data to the user. It should be noted that some kinds of terminal devices may not have input/output devices.

When data needs to be sent, the processor performs baseband processing on the data to be sent and outputs baseband signals to the radio frequency circuit, and the radio frequency circuit performs radio frequency processing on the baseband signals and sends the radio frequency signals to the outside in the form of electromagnetic waves through the antenna. When data is sent to the terminal equipment, the radio frequency circuit receives radio frequency signals through the antenna, converts the radio frequency signals into baseband signals and outputs the baseband signals to the processor, and the processor converts the baseband signals into the data and processes the data. For ease of illustration, only one memory and processor are shown in FIG. 17, and in an actual end device product, one or more processors and one or more memories may be present. The memory may also be referred to as a storage medium or a storage device, etc. The memory may be provided independently of the processor, or may be integrated with the processor, which is not limited in this embodiment.

In the embodiment of the present application, the antenna and the radio frequency circuit having the transceiving function may be regarded as a transceiving unit of the terminal device, and the processor having the processing function may be regarded as a processing unit of the terminal device.

As shown in fig. 17, the terminal device includes a transceiving unit 1710 and a processing unit 1720. The transceiving unit 1710 may also be referred to as a transceiver, transceiving means, etc. Processing unit 1720 may also be referred to as a processor, a processing board, a processing module, a processing device, or the like. Alternatively, a device for implementing a receiving function in the transceiving unit 1710 may be regarded as a receiving unit, and a device for implementing a transmitting function in the transceiving unit 1710 may be regarded as a transmitting unit, that is, the transceiving unit 1710 includes a receiving unit and a transmitting unit. A transceiver unit may also sometimes be referred to as a transceiver, transceiving circuitry, or the like. The receiving unit may also be sometimes referred to as a receiver, or receiving circuit, etc. A transmitting unit may sometimes also be referred to as a transmitter, a transmitting circuit, or the like.

For example, in one implementation, the processing unit 1720 is configured to perform other processing steps on the terminal device side in the embodiments of the present application. The transceiving unit 1710 is configured to perform steps 910 and 920 shown in fig. 9, and/or the transceiving unit 1710 is further configured to perform other transceiving steps on the terminal device side.

It should be understood that fig. 17 is only an example and not a limitation, and the terminal device including the transceiving unit and the processing unit described above may not depend on the structure shown in fig. 17.

When the communication device 1700 is a chip, the chip includes a transceiving unit and a processing unit. The transceiving unit can be an input/output circuit or a communication interface; the processing unit may be a processor or a microprocessor or an integrated circuit integrated on the chip.

The embodiment of the present application further provides a communication apparatus 1800, where the communication apparatus 1800 may be a network device or a chip. The communications apparatus 1800 may be used to perform the actions performed by the network device in the above-described method embodiments.

When the communication device 1800 is a network device, it is a base station, for example. Fig. 18 shows a simplified schematic diagram of a base station structure. The base station includes 1810 portions and 1820 portions. 1810 part is mainly used for receiving and transmitting radio frequency signals and converting the radio frequency signals and baseband signals; section 1820 is mainly used for baseband processing, base station control, and the like. Portion 1810 may be generally referred to as a transceiver unit, transceiver, transceiving circuitry, or transceiver, etc. Section 1820 is generally a control center of the base station, and may be generally referred to as a processing unit, and is configured to control the base station to perform the processing operation on the network device side in the foregoing method embodiments.

1810 transceiver unit, which may also be referred to as transceiver or transceiver, includes an antenna and a radio frequency unit, wherein the radio frequency unit is mainly used for radio frequency processing. Alternatively, a device used for implementing the receiving function in part 1810 may be regarded as a receiving unit, and a device used for implementing the sending function may be regarded as a sending unit, that is, part 1810 includes a receiving unit and a sending unit. A receiving unit may also be referred to as a receiver, a receiving circuit, or the like, and a transmitting unit may be referred to as a transmitter, a transmitting circuit, or the like.

Section 1820 may include one or more boards, each of which may include one or more processors and one or more memories. The processor is used to read and execute programs in the memory to implement baseband processing functions and control of the base station. If a plurality of single boards exist, the single boards can be interconnected to enhance the processing capacity. As an alternative implementation, multiple boards may share one or more processors, multiple boards may share one or more memories, or multiple boards may share one or more processors at the same time.

For example, in one implementation, the transceiver unit of part 1810 is configured to perform the transmission operation on the network device side in step 910 and step 920 shown in fig. 9, and/or the transceiver unit of part 1810 is further configured to perform other transceiver steps on the network device side in the embodiment of the present application. The processing unit of section 1820 is configured to perform the processing operation in step 901 in fig. 9, and/or the processing unit of section 1820 is further configured to perform the processing steps on the network device side in the embodiment of the present application.

It should be understood that fig. 18 is only an example and not a limitation, and the network device including the transceiving unit and the processing unit described above may not depend on the structure shown in fig. 18.

When the communication device 1800 is a chip, the chip includes a transceiver unit and a processing unit. The transceiver unit can be an input/output circuit and a communication interface; the processing unit is a processor or a microprocessor or an integrated circuit integrated on the chip.

The network device is not limited to the above-described embodiment, and may be in another embodiment: for example: the antenna comprises a BBU (baseband unit) and an Adaptive Radio Unit (ARU), or the BBU and an Active Antenna Unit (AAU); the CPE may be a Customer Premise Equipment (CPE) or another type, and the present application is not limited thereto.

The BBU described above may be used to perform actions implemented by the network device described in the foregoing method embodiments, and the RRU may be used to perform actions that the network device described in the foregoing method embodiments sends to or receives from the terminal device. Please refer to the description of the previous embodiment of the method, which is not repeated herein.

The embodiment of the application also provides a processing device which comprises a processor and an interface. The processor may be adapted to perform the method of the above method embodiments.

It should be understood that the processing means may be a chip. For example, the processing device may be a Field Programmable Gate Array (FPGA), an Application Specific Integrated Circuit (ASIC), a system on chip (SoC), a Central Processing Unit (CPU), a Network Processor (NP), a digital signal processing circuit (DSP), a Micro Controller Unit (MCU), a Programmable Logic Device (PLD) or other integrated chips.

In implementation, the steps of the above method may be performed by integrated logic circuits of hardware in a processor or instructions in the form of software. The steps of a method disclosed in connection with the embodiments of the present application may be directly implemented by a hardware processor, or may be implemented by a combination of hardware and software modules in a processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in a memory, and a processor reads information in the memory and completes the steps of the method in combination with hardware of the processor. To avoid repetition, it is not described in detail here.

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

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

According to the method provided by the embodiment of the present application, the present application further provides a computer program product, which includes: computer program code which, when run on a computer, causes the computer to perform the method of any one of the embodiments shown in figures 9 to 15.

There is also provided a computer readable medium having program code stored thereon, which when run on a computer causes the computer to perform the method of any one of the embodiments illustrated in fig. 9-15.

According to the method provided by the embodiment of the present application, the present application further provides a system, which includes the foregoing one or more terminal devices and one or more network devices.

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

The network device in the foregoing various apparatus embodiments corresponds to the terminal device or the network device in the terminal device and method embodiments, and the corresponding module or unit executes the corresponding steps, for example, the communication unit (transceiver) executes the steps of receiving or transmitting in the method embodiments, and other steps besides transmitting and receiving may be executed by the processing unit (processor). The functions of the specific elements may be referred to in the respective method embodiments. The number of the processors may be one or more.

As used in this specification, the terms "component," "module," "system," and the like are intended to refer to a computer-related entity, either hardware, firmware, a combination of hardware and software, or software in execution. For example, a component may be, but is not limited to being, a process running on a processor, an object, an executable, a thread of execution, a program, and/or a computer. By way of illustration, both an application running on a computing device and the computing device can be a component. One or more components can reside within a process and/or thread of execution and a component can be localized on one computer and/or distributed between two or more computers. In addition, these components can execute from various computer readable media having various data structures stored thereon. The components may communicate by way of local and/or remote processes such as in accordance with a signal having one or more data packets (e.g., data from two components interacting with another component in a local system, distributed system, and/or across a network such as the internet with other systems by way of the signal).

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

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

In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

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

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

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application or portions thereof that substantially contribute to the prior art may be embodied in the form of a software product stored in a storage medium and including instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.

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

Claims

1. A method of receiving data, comprising:

terminal equipment receives Downlink Control Information (DCI), wherein the DCI is used for indicating a time domain resource indication, and the time domain resource indication comprises information of a relative position between a time domain resource used for transmitting data and the time domain resource used for transmitting the DCI;

and the terminal equipment receives the data based on the time domain resource indication.

2. The method of claim 1, wherein the time domain resource indicator indicates S and L, the S represents the number of symbols between a time domain resource used for transmitting the data and a starting position of the time domain resource used for transmitting the DCI, the L represents a length of the time domain resource used for transmitting the data, and S, L is an integer greater than or equal to 0.

3. The method of claim 2, wherein the value of S is any one of: t, T +1, T + 2;

wherein T represents the number of symbols occupied by time domain resources for transmitting the DCI, and T is an integer greater than 1 or equal to 1.

4. The method according to claim 1 or 2, characterized in that the method further comprises:

the terminal equipment acquires first indication information, wherein the first indication information is used for indicating information of frequency domain resources used for transmitting the data.

5. The method according to claim 4, wherein the first indication information is used for indicating any one of the following items:

the frequency domain resources used for transmitting the data are not overlapped with the frequency domain resources occupied by the GC-PDCCH;

the frequency domain resources used for transmitting the data are not overlapped with the frequency domain resources occupied by the terminal equipment dedicated PDCCH;

the frequency domain resource used for transmitting the data is not overlapped with the frequency domain resource occupied by the GC-PDCCH and the frequency domain resource occupied by the special PDCCH of the terminal equipment;

the frequency domain resources used for transmitting the data are resources except the frequency domain resources occupied by the GC-PDCCH, and the first indication information comprises information of the frequency domain resources occupied by the GC-PDCCH; or the like, or, alternatively,

The frequency domain resources used for transmitting the data do not overlap with the frequency domain resources occupied by the terminal device specific PDCCH, and the terminal device specific PDCCH includes indication information indicating that the GC-PDCCH is not transmitted.

6. A method according to claim 2 or 3, characterized in that the method further comprises:

and the terminal equipment receives second indication information, wherein the second indication information is used for indicating the number of symbols between the S and the starting position of the time domain resource used for transmitting the data and the time domain resource used for transmitting the DCI.

7. The method according to any one of claims 1 to 6, further comprising:

the terminal equipment determines the position of time-frequency resources used for transmitting the data according to one or more of the following items:

the time frequency resource used for transmitting the synchronous signal block, the time frequency resource used for transmitting the channel state information reference signal CSI-RS, the time frequency resource used for transmitting the paging, or the time frequency resource used for demodulating the demodulation reference signal DMRS of the data.

8. A method of transmitting data, comprising:

the network equipment determines a time domain resource indication;

and the network equipment sends the DCI to terminal equipment, wherein the DCI comprises information of the time domain resource indication, and the time domain resource indication comprises information of the relative position between the time domain resource used for transmitting the data and the time domain resource used for transmitting the DCI.

9. The method of claim 8, wherein the time domain resource indicator indicates S and L, the S represents the number of symbols between a time domain resource used for transmitting the data and a starting position of the time domain resource used for transmitting the DCI, the L represents a length of the time domain resource used for transmitting the data, and S, L is an integer greater than or equal to 0.

10. The method of claim 9, wherein S takes on any one of the following values: t, T +1, T + 2;

11. The method according to claim 8 or 9,

the method further comprises the following steps:

and the network equipment sends first indication information to the terminal equipment, wherein the first indication information is used for indicating information of frequency domain resources used for transmitting the data.

12. The method according to claim 11, wherein the first indication information is used for indicating any one of the following:

13. The method according to claim 9 or 10, characterized in that the method further comprises:

and the network equipment sends second indication information to the terminal equipment, wherein the second indication information is used for indicating the number of symbols between the S and the starting position of the time domain resource used for transmitting the data and the time domain resource used for transmitting the DCI.

14. A communications apparatus, comprising: a processing unit and a communication unit, wherein,

the communication unit is configured to: receiving Downlink Control Information (DCI), wherein the DCI is used for indicating a time domain resource indication, and the time domain resource indication comprises information of a relative position between a time domain resource used for transmitting data and the time domain resource used for transmitting the DCI;

The processing unit is configured to: determining the time domain resource indication;

the communication unit is further configured to: receiving the data based on the time domain resource indication.

15. The apparatus of claim 14, wherein the time domain resource indicator indicates S and L, the S represents a number of symbols between a time domain resource used for transmitting the data and a starting position of the time domain resource used for transmitting the DCI, the L represents a length of the time domain resource used for transmitting the data, and S, L is an integer greater than or equal to 0.

16. The apparatus of claim 15, wherein S takes on any one of the following values: t, T +1, T + 2;

17. The apparatus of claim 14 or 15,

the communication unit is further configured to: acquiring first indication information, wherein the first indication information is used for indicating information of frequency domain resources used for transmitting the data.

18. The apparatus according to claim 17, wherein the first indication information is used to indicate any one of:

frequency domain resources used for transmitting the data do not overlap with frequency domain resources occupied by the communication device specific PDCCH;

the frequency domain resources used for transmitting the data are not overlapped with the frequency domain resources occupied by the GC-PDCCH and the frequency domain resources occupied by the communication device dedicated PDCCH;

frequency domain resources used for transmission of the data do not overlap with frequency domain resources occupied by the communication apparatus dedicated PDCCH, and the communication apparatus dedicated PDCCH includes indication information indicating that the GC-PDCCH is not transmitted.

19. The apparatus of claim 15 or 16,

the communication unit is further configured to: and receiving second indication information, wherein the second indication information is used for indicating the number of symbols between the S-representation time domain resource used for transmitting the data and the starting position of the time domain resource used for transmitting the DCI.

20. The apparatus according to any one of claims 14 to 19, wherein the processing unit is further configured to:

Determining a location of time-frequency resources for transmitting the data according to one or more of:

the time frequency resource used for transmitting the synchronous signal block, the time frequency resource used for transmitting the channel state information reference signal CSI-RS, the time frequency resource used for transmitting the paging, and the time frequency resource used for demodulating the demodulation reference signal DMRS of the data.

21. A communications apparatus, comprising: a processing unit and a communication unit, wherein,

the processing unit is configured to: determining a time domain resource indication;

the communication unit is configured to: and sending the DCI to a terminal device, wherein the DCI comprises information of the time domain resource indication, and the time domain resource indication comprises information of a relative position between a time domain resource used for transmitting data and a time domain resource used for transmitting the DCI.

22. The apparatus of claim 21, wherein the time domain resource indicator indicates S and L, wherein S represents a number of symbols between a time domain resource used for transmitting the data and a starting position of the time domain resource used for transmitting the DCI, wherein L represents a length of the time domain resource used for transmitting the data, and wherein S, L is an integer greater than or equal to 0.

23. The apparatus of claim 22, wherein S takes on any one of the following values: t, T +1, T + 2;

24. The apparatus of claim 21 or 22,

the communication unit is further configured to: and sending first indication information to the terminal equipment, wherein the first indication information is used for indicating information of frequency domain resources used for transmitting the data.

25. The apparatus according to claim 24, wherein the first indication information is used to indicate any one of:

26. The apparatus according to any of claims 21 to 25, wherein the communication unit is further configured to:

and sending second indication information to the terminal equipment, wherein the second indication information is used for indicating the number of symbols between the S and the starting position of the time domain resource used for transmitting the data and the time domain resource used for transmitting the DCI.

27. A communications apparatus, comprising:

a processor, coupled to the memory, to execute instructions in the memory to implement the method of any of claims 1 to 13.

28. A communication system, comprising: communication apparatus according to any of claims 14 to 20, and/or communication apparatus according to any of claims 21 to 26.

29. A computer-readable medium, comprising a computer program which, when run on a computer, causes the computer to perform the method of any one of claims 1 to 13.