WO2022061891A1

WO2022061891A1 - Repetitive transmission method, communication device, and storage medium

Info

Publication number: WO2022061891A1
Application number: PCT/CN2020/118413
Authority: WO
Inventors: 左志松; 崔胜江; 徐伟杰
Original assignee: Oppo广东移动通信有限公司
Priority date: 2020-09-28
Filing date: 2020-09-28
Publication date: 2022-03-31
Also published as: CN115836501B; CN115836501A

Abstract

Disclosed is a repetitive transmission method, comprising: a communication device determines a time slot for repetitive transmission according to first information, the first information comprising at least one of the following: a transmission repetition value, timing information for scheduling downlink control information (DCI), and a time slot structure. Further disclosed are a communication device and a storage medium.

Description

A kind of repeated transmission method, communication device and storage medium

technical field

The present application relates to the field of wireless communication technologies, and in particular, to a repeated transmission method, a communication device, and a storage medium.

Background technique

For different types of time slot structures, how to effectively improve the efficiency of repeated data transmission is the goal that has been pursued all the time.

SUMMARY OF THE INVENTION

Embodiments of the present application provide a method for repeated transmission, a communication device, and a storage medium, which can improve the efficiency of repeated data transmission.

In a first aspect, an embodiment of the present application provides a method for repeated transmission, including: a communication device determines a time slot for repeated transmission according to first information; the first information includes at least one of the following: a transmission repetition value, a scheduling The time domain offset between the repeatedly transmitted downlink control information (Downlink control information, DCI) and the initial transmission signal scheduled by the DCI, and the slot format (slot format).

In a second aspect, an embodiment of the present application provides a communication device, where the communication device includes: a processing unit configured to determine a time slot for repeated transmission according to first information; the first information includes at least one of the following:

A transmission repetition value, a time domain offset between the DCI scheduled for the repeated transmission and the initial transmission of the DCI scheduling, and a slot format.

In a third aspect, an embodiment of the present application provides a communication device, including a processor and a memory for storing a computer program that can be executed on the processor, wherein the processor is configured to execute the above communication when the computer program is executed The steps of the repeated transmission method performed by the device.

In a fourth aspect, an embodiment of the present application provides a chip, including: a processor for calling and running a computer program from a memory, so that a device installed with the chip executes the repeated transmission method executed by the communication device.

In a fifth aspect, an embodiment of the present application provides a storage medium that stores an executable program, and when the executable program is executed by a processor, implements the repeated transmission method performed by the above communication device.

In a sixth aspect, an embodiment of the present application provides a computer program product, including computer program instructions, the computer program instructions cause a computer to execute the repeated transmission method executed by the above communication device.

In a seventh aspect, an embodiment of the present application provides a computer program, the computer program causing a computer to execute the repeated transmission method executed by the above communication device.

The repeated transmission method, communication device, and storage medium provided by the embodiments of the present application include: the communication device determines a time slot for repeated transmission according to first information; the first information includes at least one of the following: transmission repetition value, scheduling Timing information and slot structure of DCI. In this way, the available time slots for repeated transmission can be specified according to the time slot structure, which solves the problem of repeated transmission coverage of physical uplink shared channel (PUSCH) and/or physical downlink shared channel (PDSCH) data. The problem of insufficient data improves the efficiency of repeated data transmission.

Description of drawings

FIG. 1 is a schematic diagram of a flexible time slot structure according to an embodiment of the present application;

FIG. 2 is a schematic diagram of repeated transmission for a flexible time slot structure according to an embodiment of the present application;

FIG. 3 is a schematic diagram of a composition structure of a communication system provided by an embodiment of the present application;

FIG. 4 is a schematic diagram of an optional processing flow of the repeated transmission method provided by the embodiment of the present application;

5 is a schematic diagram of a network device scheduling PUSCH through DCI according to an embodiment of the present application;

6 is a schematic diagram of a network device scheduling PDSCH through DCI according to an embodiment of the present application;

7 is a schematic diagram of a terminal device transmitting HARQ-ACK feedback corresponding to a PDSCH according to an embodiment of the present application;

FIG. 8 is a schematic structural diagram of an optional composition of a communication device provided by an embodiment of the present application;

FIG. 9 is a schematic structural diagram of a hardware composition of a communication device provided by an embodiment of the present application.

detailed description

In order to understand the features and technical contents of the embodiments of the present application in more detail, the implementation of the embodiments of the present application will be described in detail below with reference to the accompanying drawings.

Before describing the embodiments of the present application, relevant contents are briefly described.

New Radio (NR) systems have better performance indicators than Long Term Evolution (Long Term Evolution, LTE) systems, such as data transmission rate, spectrum utilization, delay, connection density and power consumption. In addition, the NR system has good forward compatibility and can support the introduction of other enhancement technologies or new access technologies in the future. Therefore, the concepts of self-contained slots and flexible slots are introduced in NR systems.

The self-contained time slot and scheduling information, data transmission, and feedback information corresponding to the data transmission are all transmitted in one time slot, so that the purpose of reducing time delay can be achieved. A flexible slot includes downlink symbols (DL), flexible symbols (Flexible) and uplink symbols (UL) in one slot; the flexible symbols can be used as guard symbols or guard intervals for uplink and downlink transition time.

In the NR system, a variety of flexible time slot structures are defined, including all downlink time slots, all uplink time slots, all flexible time slots, and time slot structures with different numbers of downlink symbols, uplink symbols and flexible symbols; different The time slot structure corresponds to a time slot format index respectively, and one time slot may include one or two switching points of uplink and downlink.

A schematic diagram of the flexible time slot structure, as shown in Figure 1, time slot (a) includes 7 downlink symbols, 2 uplink symbols and 3 flexible symbols; time slot (b) includes 2 downlink symbols, 8 uplink symbols symbol and 3 flexible symbols; time slot (c) includes 10 downstream symbols, 2 upstream symbols and 2 flexible symbols; time slot (d) includes 4 downstream symbols, 6 upstream symbols and 4 flexible symbols .

The NR system can aggregate multi-slot Physical Uplink Shared Channel (PUSCH) and Physical Downlink Shared Channel (PDSCH) data transmission through the uplink and downlink transmission repetition value (Aggregation factor); The data transmission of the slot can improve the coverage of a single transmission of the NR system.

For scenarios where the flexible time slot structure is combined with multi-slot data transmission, it is necessary to determine which symbols or time slots can transmit repeatedly transmitted data. The schematic diagram of repeated transmission for the flexible time slot structure, as shown in Figure 2, includes 4 repeated transmissions, namely Repetition0, Repetition1, Repetition2 and Repetition3; among which, there is no actual data transmission in Repetition1 and Repetition2, and Slot0 corresponding to Repetition0 and Repetition3 is only Uplink transmission is possible; the time slot corresponding to Repetition1 can only perform downlink transmission; 9 symbols in the time slot corresponding to Repetition2 can be used for downlink transmission, 2 symbols can be used for uplink transmission, and 2 symbols belong to undetermined symbols or guard intervals.

The number of repeated transmissions is usually semi-statically configured, and the repeated transmission of PUSCH covers consecutive time slots. Therefore, when the available symbols in the time slot do not meet the requirements, if uplink repeated transmission is required, the available symbols in the time slot are only If downlink transmission can be performed, but uplink transmission cannot be performed, the repeated transmission of the time slot is ignored, that is, the repeated transmission of the time slot is not performed. In some scenarios, such as the time division duplex (Time Division Duplex, TDD) system scenario, the configured repeated transmission times cannot achieve the desired coverage enhancement effect. Due to the limitation of the actual frame structure, a large number of repeated transmissions is configured in time, which will also result in no effect of repetition between multiple time slots. In this way, the coverage restriction of the TDD system is too large, which affects the deployment efficiency of the TDD system. Likewise, the FDD system configured with the flexible frame structure also has the above problems.

The technical solutions of the embodiments of the present application can be applied to various communication systems, such as: global system of mobile communication (GSM) system, code division multiple access (CDMA) system, wideband code division multiple access (wideband code division multiple access, WCDMA) system, general packet radio service (general packet radio service, GPRS), LTE system, LTE frequency division duplex (frequency division duplex, FDD) system, LTE time division duplex (time division duplex, TDD) system, advanced long term evolution (LTE-A) system, NR system, evolution system of NR system, LTE-based access to unlicensed spectrum (LTE-U) system on unlicensed frequency bands, NR (NR-based access to unlicensed spectrum, NR-U) system on unlicensed frequency band, universal mobile telecommunication system (UMTS), worldwide interoperability for microwave access (WiMAX) communication system , wireless local area networks (wireless local area networks, WLAN), wireless fidelity (wireless fidelity, WiFi), next-generation communication systems or other communication systems.

The system architecture and service scenarios described in the embodiments of the present application are for the purpose of illustrating the technical solutions of the embodiments of the present application more clearly, and do not constitute limitations on the technical solutions provided by the embodiments of the present application. The evolution of the architecture and the emergence of new business scenarios, the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems.

The network equipment involved in the embodiments of this application may be a common base station (such as a NodeB or eNB or gNB), a new radio controller (NR controller), a centralized network element (centralized unit), a new radio base station, Remote radio module, micro base station, relay, distributed unit (distributed unit), reception point (transmission reception point, TRP), transmission point (transmission point, TP) or any other equipment. The embodiments of the present application do not limit the specific technology and specific device form adopted by the network device. For the convenience of description, in all the embodiments of this application, the above-mentioned apparatuses for providing wireless communication functions for terminal equipment are collectively referred to as network equipment.

In this embodiment of the present application, the terminal device may be any terminal, for example, the terminal device may be user equipment of machine type communication. That is to say, the terminal device can also be called user equipment UE, mobile station (mobile station, MS), mobile terminal (mobile terminal), terminal (terminal), etc. network, RAN) to communicate with one or more core networks, for example, the terminal device may be a mobile phone (or "cellular" phone), a computer with a mobile terminal, etc., for example, the terminal device may also be a portable, pocket-sized , handheld, computer built-in or vehicle mounted mobile devices that exchange language and/or data with the radio access network. There is no specific limitation in the embodiments of the present application.

Optionally, network equipment and terminal equipment can be deployed on land, including indoor or outdoor, handheld or vehicle-mounted; they can also be deployed on water; they can also be deployed on aircraft, balloons and artificial satellites in the air. The embodiments of the present application do not limit the application scenarios of the network device and the terminal device.

Optionally, communication between the network device and the terminal device and between the terminal device and the terminal device can be performed through licensed spectrum (licensed spectrum), or through unlicensed spectrum (unlicensed spectrum), or both through licensed spectrum and unlicensed spectrum for communications. Communication between network equipment and terminal equipment and between terminal equipment and terminal equipment can be carried out through the spectrum below 7 gigahertz (GHz), or through the frequency spectrum above 7 GHz, and can also use the frequency spectrum below 7 GHz and the frequency spectrum at the same time. The spectrum above 7GHz is used for communication. The embodiments of the present application do not limit the spectrum resources used between the network device and the terminal device.

Generally speaking, traditional communication systems support a limited number of connections and are easy to implement. However, with the development of communication technology, mobile communication systems will not only support traditional communication, but also support, for example, device to device (device to device, D2D) communication, machine to machine (M2M) communication, machine type communication (MTC), and vehicle to vehicle (V2V) communication, etc., the embodiments of the present application can also be applied to these communications system.

Exemplarily, the communication system 100 applied in this embodiment of the present application is as shown in FIG. 3 . The communication system 100 may include a network device 110, and the network device 110 may be a device that communicates with a terminal device 120 (or referred to as a communication terminal, a terminal). The network device 110 may provide communication coverage for a particular geographic area, and may communicate with terminal devices located within the coverage area. Optionally, the network device 110 may be a base station (Base Transceiver Station, BTS) in a GSM system or a CDMA system, a base station (NodeB, NB) in a WCDMA system, or an evolved base station in an LTE system (Evolutional Node B, eNB or eNodeB), or a wireless controller in a cloud radio access network (Cloud Radio Access Network, CRAN), or the network device can be a mobile switching center, relay station, access point, in-vehicle equipment, Wearable devices, hubs, switches, bridges, routers, network-side devices in 5G networks, or network devices in the future evolved Public Land Mobile Network (PLMN), etc.

The communication system 100 also includes at least one terminal device 120 located within the coverage area of the network device 110. As used herein, "terminal equipment" includes, but is not limited to, connections via wired lines, such as via Public Switched Telephone Networks (PSTN), Digital Subscriber Line (DSL), digital cable, direct cable connections and/or another data connection/network; and/or via a wireless interface, e.g. for cellular networks, Wireless Local Area Networks (WLAN), digital television networks such as DVB-H networks, satellite networks, AM- An FM broadcast transmitter; and/or a device of another terminal device configured to receive/transmit communication signals; and/or an Internet of Things (IoT) device. A terminal device arranged to communicate via a wireless interface may be referred to as a "wireless communication terminal", "wireless terminal" or "mobile terminal". Examples of mobile terminals include, but are not limited to, satellite or cellular telephones; Personal Communications System (PCS) terminals that may combine cellular radio telephones with data processing, facsimile, and data communication capabilities; may include radio telephones, pagers, Internet/Intranet PDAs with networking access, web browsers, memo pads, calendars, and/or Global Positioning System (GPS) receivers; and conventional laptop and/or palmtop receivers or others including radiotelephone transceivers electronic device. Terminal equipment may refer to an access terminal, user equipment (UE), subscriber unit, subscriber station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or user device. The access terminal may be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a wireless communication Functional handheld devices, computing devices or other processing devices connected to wireless modems, in-vehicle devices, wearable devices, terminal devices in 5G networks or in future evolved PLMNs, etc.

Optionally, direct terminal (Device to Device, D2D) communication may be performed between the terminal devices 120 .

Optionally, the 5G system or 5G network may also be referred to as an NR system or an NR network.

FIG. 3 exemplarily shows one network device and two terminal devices. Optionally, the communication system 100 may include multiple network devices and the coverage of each network device may include other numbers of terminal devices. This application The embodiment does not limit this.

Optionally, the communication system 100 may further include other network entities such as a network controller and a mobility management entity, which are not limited in this embodiment of the present application.

It should be understood that, in the embodiments of the present application, a device having a communication function in the network/system may be referred to as a communication device. Taking the communication system 100 shown in FIG. 3 as an example, the communication device may include a network device 110 and a terminal device 120 with a communication function, and the network device 110 and the terminal device 120 may be the specific devices described above, which will not be repeated here. ; The communication device may also include other devices in the communication system 100, such as other network entities such as a network controller, a mobility management entity, etc., which are not limited in this embodiment of the present application.

An optional processing flow of the repeated transmission method provided by the embodiment of the present application, as shown in FIG. 4 , includes the following steps:

Step S201, the communication device determines a time slot for repeated transmission according to first information, where the first information includes at least one of the following: a transmission repetition value, a DCI for scheduling the repeated transmission, and an initial transmission signal for the DCI scheduling time-domain offset, and slot format.

In some embodiments, the communication device may be a terminal device or a network device; the repeated transmission may be uplink repeated transmission, that is, repeated transmission of data sent by the terminal device to the network device; the repeated transmission may also be It is the downlink repeated transmission, that is, the repeated transmission of the data sent by the network device to the terminal device.

In some embodiments, the slot format may refer to the direction of OFDM symbols within a slot. The direction of the OFDM symbol may refer to the direction of the signal carried by the OFDM symbol. If the signal carried by the OFDM symbol is an uplink signal, the direction of the OFDM symbol is the uplink; if the signal carried by the OFDM symbol is a downlink signal, then The direction of the OFDM symbol is downlink.

In some embodiments, the transmission repetition value may be the maximum number of repeated transmissions, and the transmission repetition value may be configured by the network device to the terminal device through RRC signaling. The time domain offset between the DCI scheduling the repeated transmission and the initial transmission signal scheduled by the DCI may be indicated by the DCI sent by the network device, and the time domain offset may include one or more of the following: If the initial transmission signal includes PUSCH, the time domain offset includes the time slot offset between the DCI and the PUSCH; if the initial transmission signal includes PDSCH, the time domain offset includes the time slot offset between the DCI and the PUSCH. the time domain offset between the DCI and the PDSCH. The initial transmission signal scheduled by DCI may be an uplink signal, a downlink signal, or an uplink signal and a downlink signal; for example, the DCI may schedule PDSCH, or PUCCH, or PUSCH.

The following describes the determination of the time slot for repeated transmission by the communication device according to the first information for different scenarios.

scene one

The initial transmission signal scheduled by DCI is PUSCH, and the communication device determines the time slot of the i-th repeated transmission according to the time domain offset between DCI and the PUSCH; wherein, i is greater than or equal to 0, and i is less than the transmission repetition value.

In some embodiments, the communication device uses the time slot indicated by the time domain offset as an initial time slot, and determines the i-th time slot after the initial time slot that satisfies the first preset condition, which is the The time slot of the ith repeated transmission. The time domain offset may be a time slot offset, and the time slot offset may be represented by K2.

The first preset condition includes: the number of available OFDM symbols reaches a preset value, and the preset value may be determined according to the actual structure of the time slot, for example, the threshold value is 1, or 2, or 3, or 4. The available OFDM symbols may belong to one time slot, and the available OFDM symbols include: the direction of the OFDM symbols is the same as the direction of the initial transmission signal scheduled by the DCI; wherein the direction of the OFDM symbols is the same as the direction of the initial transmission signal scheduled by the DCI; The direction of the initial transmission signal scheduled by the DCI is the same, and may be: the scheduled DCI is used to schedule the PUSCH, and the OFDM symbol is an uplink symbol and/or a flexible symbol.

For example, as shown in FIG. 5 , the DCI is transmitted using the PDCCH in Slot 4, and the time slot offset between the DCI and the PUSCH scheduled by the DCI is 4, then the scheduling DCI is used to schedule the transmission of the PUSCH in Slot 8, then Slot 8 bits start time slot. The time slot of the first repeated transmission is the time slot after Slot8 where the number of available OFDM symbols reaches the preset value, and the time slot of the second repeated transmission is the time slot after Slot8 where the number of available 2nd OFDM symbols reaches the preset value. The set value of the time slot, and so on, the time slot for the i-th repeated transmission is the time slot for which the number of the i-th available OFDM symbols after Slot8 is greater than or equal to the preset value.

In some other embodiments, the communication device uses the time slot indicated by the time domain offset as the initial time slot, and the time slot satisfying the second preset condition from the initial time slot is the repeated transmission time slot.

Wherein, the continuously available OFDM symbols are located in one time slot. The second preset condition includes: the number of continuously available OFDM symbols reaches a preset value, and the preset value may be determined according to the time slot format, for example, the preset value is 1, or 2, or 3, or 4.

In some embodiments, one, or two, or more than two repeated transmissions may be performed within a time slot. For example, the initial time slot is used for the initial transmission of signals, then the first repeated transmission of the signal can also be in the initial time slot; or, the second time can be performed in a time slot Repeat transmission and third repeat transmission; even more than two repeat transmissions can be performed in one time slot.

Still taking Figure 5 as an example, in Slot4, the PDCCH is used to transmit DCI, and the time slot offset between the DCI and the initial transmission of the PUSCH scheduled by the DCI is 4, then the DCI is used to schedule the transmission of the PUSCH in Slot8, then the Slot8 bit starts time slot. The time slot for the first repeated transmission starts from Slot8, the first time slot when the number of consecutively available OFDM symbols reaches the preset value, the time slot for the second repeated transmission starts from Slot8, and the second continuous available OFDM symbol The number of time slots reaches the preset value, and so on, the time slot of the ith repeated transmission is the time slot to which the number of the ith continuous available OFDM symbols is greater than or equal to the threshold OFDM symbol group from Slot8. Of course, a time slot may include two or more consecutively available OFDM symbols whose number reaches a preset value; The time slot in which the number of 2 consecutively available OFDM symbols reaches the preset value can be the same time slot; for example, the preset value is 2, and the number of two consecutively available OFDM symbols in slot9 is 2, then the two A group of consecutively available OFDM symbols corresponds to two repeated transmissions within one time slot.

scene two

The initial transmission signal scheduled by DCI is PDSCH, and the communication device determines the time slot of the i-th repeated transmission according to the time domain offset between DCI and the PDSCH; wherein, i is greater than or equal to 0, and i is less than the Duplicate values are transmitted.

The first preset condition includes: the number of available OFDM symbols reaches a preset value, and the preset value may be determined according to the actual structure of the time slot, for example, the threshold value is 1, or 2, or 3, or 4. The available OFDM symbols may belong to one time slot, and the available OFDM symbols include: the direction of the OFDM symbols is the same as the direction of the initial transmission signal scheduled by the DCI; wherein the direction of the OFDM symbols is the same as the direction of the initial transmission signal scheduled by the DCI; The direction of the initial transmission signal scheduled by the DCI is the same, and may be: the scheduled DCI is used to schedule the PDSCH, and the OFDM symbol is a downlink symbol and/or a flexible symbol. The direction of the symbol may refer to the direction of the signal carried by the symbol. If the signal carried by the symbol is an uplink signal, the direction of the symbol is uplink; if the signal carried by the symbol is a downlink signal, the direction of the symbol is downlink .

For example, as shown in FIG. 6 , the PDCCH is used to transmit DCI in Slot1, and the time slot offset between the DCI and the PDSCH scheduled by the DCI is 2, then the DCI is used to schedule the PDSCH transmission in Slot3, and the Slot3 bit starts start time slot. The time slot of the first repeated transmission is the time slot after Slot3 where the number of available OFDM symbols reaches the preset value, and the time slot of the second repeated transmission is the time slot after Slot3 where the number of the second available OFDM symbols reaches the preset value. The set time slot, and so on, the time slot for the i-th repeated transmission is the time slot in which the number of the i-th available OFDM symbols after Slot3 reaches the preset value.

In other embodiments, the communication device uses the time slot indicated by the time domain offset as the starting time slot, and the time slot satisfying the second preset condition from the starting time slot is the time slot of the repeated transmission. time slot.

Wherein, the continuously available OFDM symbols are located in one time slot. The second preset condition includes: the number of continuously available OFDM symbols reaches a preset value, and the preset value may be determined according to the time slot format, such as preset as 1, or 2, or 3, or 4.

Still taking Figure 6 as an example, in Slot1, the PDCCH is used to transmit DCI, and the time slot interval between the DCI and the PDSCH initial transmission scheduled by the DCI is 2, then the DCI is used to schedule the PDSCH transmission in Slot3, then when the Slot3 bit starts gap. The time slot for the first repeated transmission starts from Slot3, the first time slot when the number of continuously available OFDM symbols reaches the preset value, the time slot for the second repeated transmission starts from Slot3, and the second continuous available OFDM symbol The number of time slots reaches the preset value, and so on, the time slot for the i-th repeated transmission starts from Slot3, and the number of the i-th continuous available OFDM symbols reaches the preset value. Of course, a time slot may include two or more consecutively available OFDM symbols whose number reaches a preset value; The time slot in which the number of 2 consecutively available OFDM symbols reaches the preset value can be the same time slot; for example, the preset value is 2, and the number of two consecutively available OFDM symbols in slot9 is 2, then the two A group of consecutively available OFDM symbols corresponds to two repeated transmissions within one time slot.

scene three

The initial transmission signal scheduled by DCI is PDSCH, the HARQ-ACK transmission time slot corresponding to the PDSCH scheduled by the DCI, the time slot for stopping repeated transmission and the PDSCH indicated by the DCI and the HARQ-ACK corresponding to the PDSCH. The time slot interval (K1) for ACK feedback is determined. It can also be understood that the HARQ-ACK transmission time slot corresponding to the PDSCH scheduled by the DCI is determined by the sum of the time slot of the last repeated transmission and the K1 indicated by the DCI.

In some embodiments, the communication device determines that the position of the HARQ-ACK transmission time slot corresponding to the PDSCH scheduled by the DCI is equal to the initial transmission PDSCH indicated in the DCI and the HARQ-ACK feedback corresponding to the initial transmission PDSCH The time slot position corresponding to the sum of the time slot interval and the sum of the time slots for stopping repeated transmission.

For example, the time slot for stopping repeated transmission is Slot n, and the time slot interval between the initial transmission PDSCH and the HARQ-ACK feedback corresponding to the initial transmission PDSCH is K1, then the communication device feeds back through PUCCH at Slot n+K1 HARQ-ACK or HARQ-NACK.

As shown in FIG. 7 , the scheduling DCI is transmitted using the PDCCH in Slot 1, and the scheduling DCI is used to schedule the PDSCH transmission in Slot 3. The time slot offset of the HARQ-ACK feedback corresponding to the PDSCH and the PDSCH is 2, and repeated transmission is stopped. The time slot is Slot6, the communication device transmits HARQ-ACK in Slot8.

In some optional embodiments of the present application, the OFDM symbol used for transmitting the demodulation reference signal DMRS in one time slot of the repeated transmission is determined by the number of OFDM symbols used for the repeated transmission, the mapping type of the repeated transmission, and The DMRS additional position parameter (dmrs-AdditionalPosition) is determined.

In some embodiments, the mapping types of repeated transmission may include at least two types, such as mapping type A or mapping type B. The DMRS is used to indicate the position of one or more symbols in the slot where the DMRS is located; the dmrs-AdditionalPosition parameter can indicate the density of the DMRS in the slot. The positions of the multiple symbols where the DMRS is located may be in one symbol group, or may be in different symbol groups.

During specific implementation, the position of the OFDM symbol to which the reference signal is mapped may be determined according to the following Table 1; wherein, _ld is the number of OFDM symbols that are repeatedly transmitted for i times. l ₀ indicates the start symbol of this group of OFDM symbols.

For example, if ld=14, the higher layer configures the repeated transmission mapping type (PUSCH mapping) as type A, additional DMRS ( _dmrs -AdditionalPosition=pos3), and the corresponding item is "l ₀ , 5, 8, 11". That is, the DMRS is mapped on the 0th, 5th, 8th, and 11th OFDM symbols, and the data payload is mapped on the remaining OFDM symbols.

Table 1

In some optional embodiments of the present application, if the number of repeated transmissions of the PDSCH or PUSCH scheduled by the scheduling DCI is greater than or equal to the repeated transmission value, the communication device stops the repeated transmission.

In some embodiments, the repeated transmission value has a valid transmission time; if the number of times of the repeated transmission is greater than or equal to the transmission repetition value within the valid transmission time, the repeated transmission is stopped; or, if it reaches Effective transmission time, if the number of repeated transmissions is less than the transmission repetition value, the repeated transmission is stopped. The repeated transmission value is the maximum number of repeated transmissions within the valid transmission time.

It should be noted that, in some embodiments, when the transmission repetition value is N, N repeated transmissions need to be performed, wherein if the repeated transmission times i=0, it means the first repeated transmission; if the repeated transmission times i=1 , represents the second repeated transmission; and so on, if the number of repeated transmissions i=N-1, represents the Nth repeated transmission.

In some embodiments, when the transmission repetition value is N, N-1 repeated transmissions need to be performed, wherein, the first transmission corresponds to N=0; if the number of repeated transmissions i=1, it corresponds to the first repeated transmission; if the repeated transmission The number of times i=2 corresponds to the second repeated transmission; and so on, if the number of repeated transmissions i=N, corresponds to the Nth repeated transmission.

The repeated transmission method provided by the embodiment of the present application can adaptively perform repeated transmission according to the time slot structure, and clarifies the HARQ feedback mechanism. According to the self-adaptive repeated transmission of the time slot structure, the time slot that can transmit the repeated transmission under the TDD system and the flexible time slot structure is clarified, and the available time slot is effectively used to transmit PUSCH and/or PDSCH, which solves the problem of PUSCH and/or PDSCH. The problem of insufficient data coverage improves the efficiency of repeated data transmission. The repeated transmission method provided by the embodiments of the present application can reduce the number of HARQ retransmissions by effectively utilizing time slots to transmit data. In addition, the repeated transmission method provided by the embodiment of the present application dynamically determines the mapping situation of the DMRS of the PUSCH and/or PDSCH and the OFDM symbol of the data payload based on the factor of the time slot structure, thereby ensuring the reception performance of the data by the receiving end; and, The receiving end can be compatible with the demodulation mechanism of the original NR system to the maximum extent, which reduces the complexity of the receiving end and ensures the compatibility of the system.

To implement the repeated transmission method provided by the embodiment of the present application, the embodiment of the present application further provides a communication device. The optional composition structure of the communication device 300, as shown in FIG. 8 , includes:

The processing unit 301 is configured to determine a time slot for repeated transmission according to first information; the first information includes at least one of the following:

In some optional embodiments, the processing unit 301 is configured to, if the initial transmission signal includes the PUSCH, the communication device determines the ith time according to the time slot offset between the DCI and the PUSCH A time slot for repeated transmissions; where i is greater than or equal to 0 and i is less than the transmission repetition value.

In some optional embodiments, the processing unit 301 is configured to, if the initial transmission signal includes the PDSCH, the communication device determines the ith time according to the time domain offset between the DCI and the PDSCH A time slot for repeated transmissions; where i is greater than or equal to 0 and i is less than the transmission repetition value.

In some optional embodiments, the time slot indicated by the time domain offset is used as an initial time slot, and the i th time slot after the initial time slot that satisfies the first preset condition is the ith time slot. A time slot for i repeated transmissions.

In some optional embodiments, the first preset condition includes: the number of available OFDM symbols reaches a preset value.

In some optional embodiments, the available OFDM symbols are contiguous within the time slot; alternatively, the available OFDM symbols are discontinuous within the time slot.

In some optional embodiments, the time slot indicated by the time domain offset is used as the starting time slot, and the time slot satisfying the second preset condition from the starting time slot is the time slot of the repeated transmission. time slot.

In some optional embodiments, the second preset condition includes: the number of consecutive available OFDM symbols reaches a preset value.

In some optional embodiments, the available OFDM symbols include: the direction of the OFDM symbols is the same as the direction of the initial transmission signal scheduled by the DCI.

In some optional embodiments, the direction of the OFDM symbol is the same as the direction of the initial transmission signal scheduled by the DCI, including at least one of the following:

The scheduling DCI is used for scheduling PDSCH, and the OFDM symbols are downlink symbols and/or flexible symbols;

And, the scheduling DCI is used for scheduling the PUSCH, and the OFDM symbols are uplink symbols and/or flexible symbols.

In some optional embodiments, if the initial transmission signal includes a PDSCH, the time domain position for transmitting the HARQ-ACK corresponding to the PDSCH is determined by the time slot in which repeated transmission is stopped and the PDSCH indicated by the DCI and the PDSCH. The time domain offset of the HARQ-ACK corresponding to the PDSCH is determined.

In some optional embodiments, the time domain position for transmitting the HARQ-ACK is equal to the time corresponding to the sum of the time domain offset of the PDSCH and the HARQ-ACK and the sum of the time slots for stopping repeated transmission gap location.

In some optional embodiments, the processing unit 301 is further configured to stop the repeated transmission if the number of times of the repeated transmission is greater than or equal to the repeated transmission value.

In some optional embodiments, the processing unit 301 is configured to stop the repeated transmission if the number of times of the repeated transmission is greater than or equal to the transmission repetition value within the valid transmission time.

In some optional embodiments, the processing unit 301 is configured to stop the repeated transmission if the number of times of the repeated transmission is less than the transmission repetition value when the valid transmission time is reached.

In some optional embodiments, the OFDM symbols used for transmitting DMRS in one time slot of the repeated transmission are determined by the number of OFDM symbols available for repeated transmission, the mapping type (mapping type) of the repeated transmission and the DMRS The additional position (dmrs-AdditionalPosition) parameter is determined.

In some optional embodiments, the positions of the multiple symbols where the DMRS is located may be in one symbol group, or may be in different symbol groups.

In some optional embodiments, the transmission repetition value is N, which represents N repeated transmissions; if the number of repeated transmissions i=0, it represents the first repeated transmission; if the number of repeated transmissions i=1, it represents the second repetition Transmission; and so on, if the number of repeated transmissions i=N-1, it represents the Nth repeated transmission.

In some optional embodiments, the repeated transmission includes: uplink repeated transmission and/or downlink repeated transmission.

In some optional embodiments, the communication device 300 includes: a terminal device and/or a network device.

In some optional embodiments, if the communication device 300 includes a terminal device, the communication device further includes:

The first communication unit 302 is configured to receive the DCI and RRC signaling, receive downlink data or send uplink data.

In some optional embodiments, if the communication device 300 includes a network device, the communication device further includes:

The second communication unit 303 is configured to send DCI and RRC signaling, to send downlink data or to receive uplink data.

An embodiment of the present application further provides a communication device, including a processor and a memory for storing a computer program that can be executed on the processor, wherein the processor is configured to execute the above-mentioned communication device when running the computer program. Repeat the steps of the transfer method.

An embodiment of the present application further provides a chip, including: a processor, configured to call and run a computer program from a memory, so that a device on which the chip is installed executes the repeated transmission method executed by the communication device.

An embodiment of the present application further provides a storage medium storing an executable program, and when the executable program is executed by a processor, the above-mentioned repeated transmission method performed by the communication device is implemented.

Embodiments of the present application further provide a computer program product, including computer program instructions, the computer program instructions enable a computer to execute the repeated transmission method executed by the above communication device.

The embodiment of the present application further provides a computer program, the computer program enables the computer to execute the repeated transmission method executed by the above communication device.

9 is a schematic diagram of a hardware structure of a communication device (terminal device or network device) according to an embodiment of the present application. The communication device 700 includes: at least one processor 701 , memory 702 and at least one network interface 704 . The various components in communication device 700 are coupled together by bus system 705 . It can be understood that the bus system 705 is used to implement the connection communication between these components. In addition to the data bus, the bus system 705 also includes a power bus, a control bus and a status signal bus. However, for clarity of illustration, the various buses are labeled as bus system 705 in FIG. 9 .

It will be appreciated that memory 702 may be either volatile memory or non-volatile memory, and may include both volatile and non-volatile memory. Among them, the non-volatile memory can be ROM, Programmable Read-Only Memory (PROM, Programmable Read-Only Memory), Erasable Programmable Read-Only Memory (EPROM, Erasable Programmable Read-Only Memory), Electrically Erasable Programmable Read-Only Memory Programmable read-only memory (EEPROM, Electrically Erasable Programmable Read-Only Memory), magnetic random access memory (FRAM, ferromagnetic random access memory), flash memory (Flash Memory), magnetic surface memory, optical disk, or CD-ROM -ROM, Compact Disc Read-Only Memory); magnetic surface memory can be disk memory or tape memory. Volatile memory may be Random Access Memory (RAM), which acts as an external cache. By way of example but not limitation, many forms of RAM are available, such as Static Random Access Memory (SRAM), Synchronous Static Random Access Memory (SSRAM), Dynamic Random Access Memory Memory (DRAM, Dynamic Random Access Memory), Synchronous Dynamic Random Access Memory (SDRAM, Synchronous Dynamic Random Access Memory), Double Data Rate Synchronous Dynamic Random Access Memory (DDRSDRAM, Double Data Rate Synchronous Dynamic Random Access Memory), Enhanced Type Synchronous Dynamic Random Access Memory (ESDRAM, Enhanced Synchronous Dynamic Random Access Memory), Synchronous Link Dynamic Random Access Memory (SLDRAM, SyncLink Dynamic Random Access Memory), Direct Memory Bus Random Access Memory (DRRAM, Direct Rambus Random Access Memory) ). The memory 702 described in the embodiments of the present application is intended to include, but not limited to, these and any other suitable types of memory.

The memory 702 in this embodiment of the present application is used to store various types of data to support the operation of the communication device 700 . Examples of such data include: any computer program used to operate on the communication device 700, such as the application program 7022. The program for implementing the method of the embodiment of the present application may be included in the application program 7022 .

The methods disclosed in the above embodiments of the present application may be applied to the processor 701 or implemented by the processor 701 . The processor 701 may be an integrated circuit chip with signal processing capability. In the implementation process, each step of the above-mentioned method can be completed by an integrated logic circuit of hardware in the processor 701 or an instruction in the form of software. The above-mentioned processor 701 may be a general-purpose processor, a digital signal processor (DSP, Digital Signal Processor), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, and the like. The processor 701 may implement or execute the methods, steps, and logical block diagrams disclosed in the embodiments of this application. A general purpose processor may be a microprocessor or any conventional processor or the like. The steps of the method disclosed in the embodiments of the present application can be directly embodied as being executed by a hardware decoding processor, or executed by a combination of hardware and software modules in the decoding processor. The software module may be located in a storage medium, and the storage medium is located in the memory 702, and the processor 701 reads the information in the memory 702, and completes the steps of the foregoing method in combination with its hardware.

In an exemplary embodiment, the communication device 700 may be implemented by one or more of an Application Specific Integrated Circuit (ASIC), a DSP, a Programmable Logic Device (PLD), a Complex Programmable Logic Device (CPLD) , Complex Programmable Logic Device), FPGA, general-purpose processor, controller, MCU, MPU, or other electronic component implementation for performing the aforementioned method.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the present application. It will be understood that each flow and/or block in the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to the processor of a general purpose computer, special purpose computer, embedded processor or other programmable data processing device to produce a machine such that the instructions executed by the processor of the computer or other programmable data processing device produce Means for implementing the functions specified in a flow or flow of a flowchart and/or a block or blocks of a block diagram.

These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory result in an article of manufacture comprising instruction means, the instructions The apparatus implements the functions specified in the flow or flow of the flowcharts and/or the block or blocks of the block diagrams.

These computer program instructions can also be loaded on a computer or other programmable data processing device to cause a series of operational steps to be performed on the computer or other programmable device to produce a computer-implemented process such that The instructions provide steps for implementing the functions specified in the flow or blocks of the flowcharts and/or the block or blocks of the block diagrams.

It should be understood that the terms "system" and "network" in this application are often used interchangeably herein. The term "and/or" in this application is only an association relationship to describe associated objects, which means that there can be three kinds of relationships, for example, A and/or B, which can mean that A exists alone, A and B exist at the same time, independently There are three cases of B. In addition, the character "/" in this application generally indicates that the related objects are an "or" relationship.

The above descriptions are only preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application shall be included in the within the scope of protection of this application.

Claims

A method of repeated transmission, the method comprising:

The communication device determines the time slot for repeated transmission according to the first information; the first information includes at least one of the following:

The transmission repetition value, the time domain offset between the downlink control information DCI scheduled for the repeated transmission and the initial transmission signal scheduled by the DCI, and the slot format.
The method according to claim 1, wherein the communication device determines the time slot for repeated transmission according to the first information, comprising:

If the initial transmission signal includes the physical uplink shared channel PUSCH, the communication device determines the time slot of the ith repeated transmission according to the time slot offset between the DCI and the PUSCH; wherein, i is greater than or equal to 0, and i is less than the transmission repetition value.
The method according to claim 1, wherein the communication device determines the time slot for repeated transmission according to the first information, comprising:

If the initial transmission signal includes the physical downlink shared channel PDSCH, the communication device determines the time slot of the ith repeated transmission according to the time domain offset between the DCI and the PDSCH; wherein, i is greater than or equal to 0, and i is less than the transmission repetition value.
The method according to claim 2 or 3, wherein, taking the time slot indicated by the time domain offset as an initial time slot, the i-th time slot after the initial time slot that satisfies the first preset condition , is the time slot of the i-th repeated transmission.
The method according to claim 4, wherein the first preset condition comprises:

The number of available OFDM symbols reaches a preset value.
The method of claim 5, wherein,

the available OFDM symbols are consecutive within the time slot;

Alternatively, the available OFDM symbols are discontinuous within the time slot.
The method according to claim 2 or 3, wherein, taking the time slot indicated by the time domain offset as the starting time slot, the time slot satisfying the second preset condition from the starting time slot is: The time slot for the repeated transmission.
The method according to claim 7, wherein the second preset condition comprises:

The number of consecutive available OFDM symbols reaches a preset value.
The method of claim 5, 6 or 8, wherein the available OFDM symbols include:

The direction of the OFDM symbol is the same as the direction of the initial transmission signal scheduled by the DCI.
The method according to claim 9, wherein the direction of the OFDM symbol is the same as the direction of the initial transmission signal scheduled by the DCI, comprising at least one of the following:

The scheduling DCI is used for scheduling PDSCH, and the OFDM symbols are downlink symbols and/or flexible symbols;

And, the scheduling DCI is used for scheduling the PUSCH, and the OFDM symbols are uplink symbols and/or flexible symbols.
The method according to any one of claims 1, 3 to 10, wherein, if the initial transmission signal includes a PDSCH, the time domain position of the HARQ-ACK corresponding to the PDSCH is transmitted by stopping the HARQ-ACK. The time slot for repeated transmission and the time domain offset of the PDSCH indicated by the DCI and the HARQ-ACK corresponding to the PDSCH are determined.
The method according to claim 11, wherein the time domain position for transmitting the HARQ-ACK is equal to the sum of the time domain offset of the PDSCH and the HARQ-ACK and the sum of the time slots for stopping repeated transmission the corresponding slot location.
The method according to any one of claims 1 to 12, wherein the method further comprises:

If the number of times of the repeated transmission is greater than or equal to the repeated transmission value, the repeated transmission is stopped.
The method of claim 13, wherein if the number of repeated transmissions is greater than or equal to the repeated transmission value, stopping the repeated transmission comprises:

If the number of times of the repeated transmission is greater than or equal to the transmission repetition value within the valid transmission time, the repeated transmission is stopped.
The method according to claim 13, wherein if the number of repeated transmissions of the initial transmission signal is greater than or equal to the repeated transmission value, stopping the repeated transmission comprises:

If the effective transmission time is reached, and the number of times of the repeated transmission is less than the transmission repetition value, the repeated transmission is stopped.
The method according to any one of claims 1 to 15, wherein the OFDM symbols used for transmitting the demodulation reference signal DMRS in one time slot of the repeated transmission are determined by the number of available OFDM symbols for repeated transmission, the The mapping type of the repeated transmission and the DMRS additional position dmrs-AdditionalPosition parameter are determined.
The method according to claim 16, wherein the positions of the multiple symbols where the DMRS is located may be within one symbol group, or may be within different symbol groups.
The method according to any one of claims 1 to 17, wherein the transmission repetition value is N, which represents N repeated transmissions; if the number of repeated transmissions i=0, it represents the first repeated transmission; if the number of repeated transmissions i =1, it means the second repeated transmission; and so on, if the number of repeated transmissions i=N-1, it means the Nth repeated transmission.
The method of any one of claims 1 to 18, wherein the repeated transmission comprises:

Upstream repeat transmission and/or downstream repeat transmission.
The method of any one of claims 1 to 19, wherein the communication device comprises:

Terminal equipment and/or network equipment.
The method according to any one of claims 1 to 20, wherein, if the communication device includes a terminal device, the method further comprises:

receiving, by the terminal equipment, the DCI and radio resource control RRC signaling;

The terminal device receives downlink data or sends uplink data.
The method according to any one of claims 1 to 21, wherein, if the communication device comprises a network device, the method further comprises:

The network device sends DCI and RRC signaling;

The network device sends downlink data or receives uplink data.
A communication device comprising:

a processing unit, configured to determine a time slot for repeated transmission according to first information; the first information includes at least one of the following:

The transmission repetition value, the time domain offset between the downlink control information DCI scheduled for the repeated transmission and the initial transmission signal scheduled by the DCI, and the slot format.
The communication device according to claim 23, wherein the processing unit is configured to, if the initial transmission signal includes a physical uplink shared channel (PUSCH), the communication device according to the time slot between the DCI and the PUSCH Offset, to determine the time slot of the ith repeated transmission; wherein, i is greater than or equal to 0, and i is less than the transmission repetition value.
The communication device according to claim 23, wherein the processing unit is configured to, if the initial transmission signal includes a physical downlink shared channel (PDSCH), the communication device according to the time domain between the DCI and the PDSCH Offset, to determine the time slot of the ith repeated transmission; wherein, i is greater than or equal to 0, and i is less than the transmission repetition value.
The communication device according to claim 24 or 25, wherein, taking the time slot indicated by the time domain offset as an initial time slot, the ith time after the initial time slot that satisfies the first preset condition slot, which is the time slot of the i-th repeated transmission.
The communication device according to claim 26, wherein the first preset condition comprises:

The number of available OFDM symbols reaches a preset value.
The communication device of claim 27, wherein,

the available OFDM symbols are consecutive within the time slot;

Alternatively, the available OFDM symbols are discontinuous within the time slot.
The communication device according to claim 24 or 25, wherein, taking the time slot indicated by the time domain offset as the starting time slot, the time slot satisfying the second preset condition from the starting time slot, is the time slot of the repeated transmission.
The communication device according to claim 29, wherein the second preset condition comprises:

The number of consecutive available OFDM symbols reaches a preset value.
A communications device according to claim 27, 28 or 30, wherein the available OFDM symbols comprise:

The direction of the OFDM symbol is the same as the direction of the initial transmission signal scheduled by the DCI.
The communication device according to claim 31, wherein the direction of the OFDM symbol is the same as the direction of the initial transmission signal scheduled by the DCI, comprising at least one of the following:

The scheduling DCI is used for scheduling PDSCH, and the OFDM symbols are downlink symbols and/or flexible symbols;

And, the scheduling DCI is used for scheduling the PUSCH, and the OFDM symbols are uplink symbols and/or flexible symbols.
The communication device according to any one of claims 23, 25 to 32, wherein, if the initial transmission signal includes a PDSCH, the time domain position of transmitting the HARQ-ACK corresponding to the PDSCH is determined by The time slot in which repeated transmission is stopped and the time domain offset of the PDSCH indicated by the DCI and the HARQ-ACK corresponding to the PDSCH are determined.
The communication device according to claim 33, wherein the time domain position for transmitting the HARQ-ACK is equal to the sum of the time domain offset of the PDSCH and the HARQ-ACK and the time slot for stopping repeated transmission the corresponding slot location.
The communication device according to any one of claims 23 to 34, wherein the processing unit is further configured to stop the repeated transmission if the number of repeated transmissions is greater than or equal to the repeated transmission value.
The communication device of claim 35, wherein the processing unit is configured to stop the repeated transmission if the number of times of the repeated transmission is greater than or equal to the transmission repetition value within a valid transmission time.
The communication device according to claim 35, wherein the processing unit is configured to stop the repeated transmission if the number of times of the repeated transmission is less than the transmission repetition value when the valid transmission time is reached.
The communication device according to any one of claims 23 to 37, wherein the OFDM symbols used for transmitting the demodulation reference signal DMRS in one time slot of the repeated transmission are determined by the number of available OFDM symbols for repeated transmission, The mapping type of the repeated transmission and the DMRS additional position dmrs-AdditionalPosition parameter are determined.
The communication device according to claim 38, wherein the positions of a plurality of symbols where the DMRS are located may be in one symbol group or in different symbol groups.
The communication device according to any one of claims 23 to 39, wherein the transmission repetition value is N, representing N repeated transmissions; if the number of repeated transmissions i=0, it represents the first repeated transmission; if the number of repeated transmissions i=1, it means the second repeated transmission; and so on, if the number of repeated transmissions i=N-1, it means the Nth repeated transmission.
The communication device of any one of claims 23 to 40, wherein the repeated transmissions comprise:

Upstream repeat transmission and/or downstream repeat transmission.
The communication device of any one of claims 23 to 41, wherein the communication device comprises:

Terminal equipment and/or network equipment.
The communication device according to any one of claims 23 to 42, wherein, if the communication device includes a terminal device, the communication device further includes:

The first communication unit is configured to receive the DCI and radio resource control RRC signaling, receive downlink data or send uplink data.
The communication device according to any one of claims 23 to 43, wherein, if the communication device includes a network device, the communication device further includes:

The second communication unit is configured to send DCI and RRC signaling, send downlink data or receive uplink data.
A communication device comprising a processor and a memory for storing a computer program executable on the processor, wherein,

The processor is configured to execute the steps of the repeated transmission method described in any one of claims 1 to 22 when running the computer program.
A storage medium storing an executable program, when the executable program is executed by a processor, the repeated transmission method according to any one of claims 1 to 22 is implemented.
A computer program product comprising computer program instructions that cause a computer to perform the repeated transmission method of any one of claims 1 to 22.
A computer program that causes a computer to perform the repeated transmission method as claimed in any one of claims 1 to 22.
A chip, comprising: a processor for calling and running a computer program from a memory, so that a device installed with the chip executes the repeated transmission method according to any one of claims 1 to 22.