CN116368760A

CN116368760A - Wireless communication method and terminal equipment

Info

Publication number: CN116368760A
Application number: CN202180071025.9A
Authority: CN
Inventors: 付喆; 徐婧; 吴作敏
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2021-01-22
Filing date: 2021-01-22
Publication date: 2023-06-30
Also published as: WO2022155926A1

Abstract

The embodiment of the application provides a wireless communication method and terminal equipment, and provides a retransmission mode for at least one of resources, HARQ (hybrid automatic repeat request) processes and MAC PDUs which are not successfully transmitted under the condition that CGRT or CG-UCI is not configured but CG-DFI is configured, so that a receiving end can execute soft combining, and the transmission efficiency and the decoding success rate are improved. The method of wireless communication includes: under the condition that the first condition is met, retransmitting at least one of the target resource, the target HARQ process and the target MAC PDU by the terminal equipment; wherein the first condition includes at least one of: the method comprises the steps that a DFI indicating NACK is received, a DFI indicating ACK is not received, an unfinished MAC PDU exists in a buffer, and the MAC PDU exists in the buffer.

Description

Wireless communication method and terminal equipment

Technical Field

The embodiment of the application relates to the field of communication, and more particularly, to a method and terminal equipment for wireless communication.

Background

In the case that the New air interface (NR) system can support a Configured Grant (CG) scheduling manner, however, a Configured Grant weight transmission timer (Configured Grant Retransmission Timer, CGRT) or Configured Grant uplink control information (Configured Grant Uplink Control Information, CG-UCI) is not Configured, if no downlink feedback information (Downlink Feedback Information, DFI) indication is received, or no acknowledgement (Negative Acknowledgement, NACK) DFI indication is received, how to perform the transmission processing is ambiguous, which is not beneficial to the consistency of understanding of the transmission behavior by the terminal and the network.

Disclosure of Invention

The embodiment of the application provides a wireless communication method and terminal equipment, and provides a retransmission mode for at least one of resources, HARQ (hybrid automatic repeat request) processes and MAC PDUs which are not successfully transmitted under the condition that CGRT or CG-UCI is not configured but CG-DFI is configured, so that a receiving end can execute soft combining, and the transmission efficiency and the decoding success rate are improved.

In a first aspect, a method of wireless communication is provided, the method comprising:

in case the first condition is met, retransmitting at least one of the target resource, the target hybrid automatic repeat request (Hybrid Automatic Repeat reQuest, HARQ) process, the target medium access control protocol data unit (Media Access Control Protocol Data Unit, MAC PDU);

wherein the first condition includes at least one of:

the DFI indicating NACK is received, the DFI indicating no DFI indication is received, the DFI indicating Acknowledgement (ACK) is not received, there is MAC PDU not transmitted in the buffer, and there is MAC PDU in the buffer.

In a second aspect, a terminal device is provided for performing the method in the first aspect.

Specifically, the terminal device comprises functional modules for performing the method in the first aspect described above.

In a third aspect, a terminal device is provided comprising a processor and a memory. The memory is used for storing a computer program, and the processor is used for calling and running the computer program stored in the memory to execute the method in the first aspect.

In a fourth aspect, there is provided an apparatus for implementing the method of the first aspect.

Specifically, the device comprises: a processor for calling and running a computer program from a memory, causing a device in which the apparatus is installed to perform the method as in the first aspect described above.

In a fifth aspect, a computer-readable storage medium is provided for storing a computer program that causes a computer to execute the method in the first aspect described above.

In a sixth aspect, there is provided a computer program product comprising computer program instructions for causing a computer to perform the method of the first aspect described above.

In a seventh aspect, there is provided a computer program which, when run on a computer, causes the computer to perform the method of the first aspect described above.

Through the technical scheme, under the condition that the first condition is met, the terminal equipment retransmits at least one of the target resource, the target HARQ process and the target MAC PDU, so that the receiving end can execute soft combining, and the transmission efficiency and the decoding success rate are improved.

Drawings

Fig. 1 is a schematic diagram of a communication system architecture to which embodiments of the present application apply.

Fig. 2 is a schematic flow chart of a method of wireless communication provided in accordance with an embodiment of the present application.

Fig. 3 is a schematic block diagram of a terminal device according to an embodiment of the present application.

Fig. 4 is a schematic block diagram of a communication device provided according to an embodiment of the present application.

Fig. 5 is a schematic block diagram of an apparatus provided in accordance with an embodiment of the present application.

Fig. 6 is a schematic block diagram of a communication system provided in accordance with an embodiment of the present application.

Detailed Description

The following description of the technical solutions in the embodiments of the present application will be made with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden for the embodiments herein, are intended to be within the scope of the present application.

The technical solution of the embodiment of the application can be applied to various communication systems, for example: global system for mobile communications (Global System of Mobile communication, GSM), code division multiple access (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), long term evolution (Long Term Evolution, LTE) system, long term evolution advanced (Advanced long term evolution, LTE-a) system, new Radio, NR system evolution system, LTE over unlicensed spectrum (LTE-based access to unlicensed spectrum, LTE-U) system, NR over unlicensed spectrum (NR-based access to unlicensed spectrum, NR-U) system, non-terrestrial communication network (Non-Terrestrial Networks, NTN) system, universal mobile telecommunication system (Universal Mobile Telecommunication System, UMTS), wireless local area network (Wireless Local Area Networks, WLAN), wireless fidelity (Wireless Fidelity, wiFi), fifth Generation communication (5 th-Generation, 5G) system, or other communication system, etc.

Generally, the number of connections supported by the conventional communication system is limited and easy to implement, however, with the development of communication technology, the mobile communication system will support not only conventional communication but also, for example, device-to-Device (D2D) communication, machine-to-machine (Machine to Machine, M2M) communication, machine type communication (Machine Type Communication, MTC), inter-vehicle (Vehicle to Vehicle, V2V) communication, or internet of vehicles (Vehicle to everything, V2X) communication, etc., and the embodiments of the present application may also be applied to these communication systems.

In some embodiments, the communication system in the embodiments of the present application may be applied to a carrier aggregation (Carrier Aggregation, CA) scenario, a dual connectivity (Dual Connectivity, DC) scenario, and a Stand Alone (SA) networking scenario.

In some embodiments, the communication system in the embodiments of the present application may be applied to unlicensed spectrum, where unlicensed spectrum may also be considered as shared spectrum; alternatively, the communication system in the embodiments of the present application may also be applied to licensed spectrum, where licensed spectrum may also be considered as non-shared spectrum.

Embodiments of the present application describe various embodiments in connection with network devices and terminal devices, where a terminal device may also be referred to as a User Equipment (UE), access terminal, subscriber unit, subscriber station, mobile station, remote terminal, mobile device, user terminal, wireless communication device, user agent, user Equipment, or the like.

The terminal device may be a STATION (ST) in a WLAN, may be a cellular telephone, a cordless telephone, a session initiation protocol (Session Initiation Protocol, SIP) phone, a wireless local loop (Wireless Local Loop, WLL) STATION, a personal digital assistant (Personal Digital Assistant, PDA) device, a handheld device with wireless communication capabilities, a computing device or other processing device connected to a wireless modem, a vehicle mounted device, a wearable device, a terminal device in a next generation communication system such as an NR network, or a terminal device in a future evolved public land mobile network (Public Land Mobile Network, PLMN) network, etc.

In embodiments of the present application, the terminal device may be deployed on land, including indoor or outdoor, hand-held, wearable or vehicle-mounted; can also be deployed on the water surface (such as ships, etc.); but may also be deployed in the air (e.g., on aircraft, balloon, satellite, etc.).

In the embodiment of the present application, the terminal device 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 (Augmented Reality, AR) terminal device, a wireless terminal device in industrial control (industrial control), a wireless terminal device in unmanned driving (self driving), a wireless terminal device in remote medical (remote medical), a wireless terminal device in smart grid (smart grid), a wireless terminal device in transportation security (transportation safety), a wireless terminal device in smart city (smart city), or a wireless terminal device in smart home (smart home), and the like.

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

In this embodiment of the present application, the network device may be a device for communicating with a mobile device, where the network device may be an Access Point (AP) in a WLAN, a base station (Base Transceiver Station, BTS) in GSM or CDMA, a base station (NodeB, NB) in WCDMA, an evolved base station (Evolutional Node B, eNB or eNodeB) in LTE, a relay station or an Access Point, a vehicle device, a wearable device, a network device or a base station (gNB) in an NR network, a network device in a PLMN network of future evolution, or a network device in an NTN network, etc.

By way of example and not limitation, in embodiments of the present application, a network device may have a mobile nature, e.g., the network device may be a mobile device. In some embodiments, the network device may be a satellite, a balloon station. For example, the satellite may be a Low Earth Orbit (LEO) satellite, a medium earth orbit (medium earth orbit, MEO) satellite, a geosynchronous orbit (geostationary earth orbit, GEO) satellite, a high elliptical orbit (High Elliptical Orbit, HEO) satellite, or the like. In some embodiments, the network device may also be a base station located on land, in water, etc.

In this embodiment of the present application, a network device may provide a service for a cell, where a terminal device communicates with the network device through a transmission resource (e.g., a frequency domain resource, or a spectrum resource) used by the cell, where the cell may be a cell corresponding to a network device (e.g., a base station), and the cell may belong to a macro base station, or may belong to a base station corresponding to a Small cell (Small cell), where the Small cell may include: urban cells (Metro cells), micro cells (Micro cells), pico cells (Pico cells), femto cells (Femto cells) and the like, and the small cells have the characteristics of small coverage area and low transmitting power and are suitable for providing high-rate data transmission services.

Exemplary, a communication system 100 to which embodiments of the present application apply is shown in fig. 1. 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, terminal). Network device 110 may provide communication coverage for a particular geographic area and may communicate with terminal devices located within the coverage area.

Fig. 1 illustrates one network device and two terminal devices, and in some embodiments, the communication system 100 may include multiple network devices and may include other numbers of terminal devices within the coverage area of each network device, which is not limited in this embodiment.

In some embodiments, the communication system 100 may further include a network controller, a mobility management entity, and other network entities, which are not limited in this embodiment.

It should be understood that a device having a communication function in a network/system in an embodiment of the present application may be referred to as a communication device. Taking the communication system 100 shown in fig. 1 as an example, the communication device may include a network device 110 and a terminal device 120 with communication functions, where the network device 110 and the terminal device 120 may be specific devices described above, and are not described herein again; the communication device may also include other devices in the communication system 100, such as a network controller, a mobility management entity, and other network entities, which are not limited in this embodiment of the present application.

It should be understood that the terms "system" and "network" are used interchangeably herein. The term "and/or" is herein merely an association relationship describing an associated object, meaning that there may be three relationships, e.g., a and/or B, may represent: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.

The terminology used in the description section of the present application is for the purpose of describing particular embodiments of the present application only and is not intended to be limiting of the present application. The terms "first," "second," "third," and "fourth" and the like in the description and in the claims of this application and in the drawings, are used for distinguishing between different objects and not for describing a particular sequential order. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion.

It should be understood that, in the embodiments of the present application, the "indication" may be a direct indication, an indirect indication, or an indication having an association relationship. For example, a indicates B, which may mean that a indicates B directly, e.g., B may be obtained by a; it may also indicate that a indicates B indirectly, e.g. a indicates C, B may be obtained by C; it may also be indicated that there is an association between a and B.

In the description of the embodiments of the present application, the term "corresponding" may indicate that there is a direct correspondence or an indirect correspondence between the two, or may indicate that there is an association between the two, or may indicate a relationship between the two and the indicated, configured, or the like.

In the embodiment of the present application, the "predefining" may be implemented by pre-storing corresponding codes, tables or other manners that may be used to indicate relevant information in devices (including, for example, terminal devices and network devices), and the specific implementation of the present application is not limited. Such as predefined may refer to what is defined in the protocol.

In this embodiment of the present application, the "protocol" may refer to a standard protocol in the communication field, for example, may include an LTE protocol, an NR protocol, and related protocols applied in a future communication system, which is not limited in this application.

To facilitate a better understanding of embodiments of the present application, high reliability low latency communications (Ultra-Reliable and Low Latency Communication, URLLC) are described in connection with the present application.

The requirements in 5G URLLC support industrial automation (Factory automation), transmission automation (Transport Industry), intelligent power (Electrical Power Distribution) and other services in the 5G system. In order to support transmission of URLLC service, configuration Grant (CG) is enhanced, i.e. a plurality of CG configurations are introduced, and specific configuration and use of CG (e.g. supporting slot-level (slot-level) periods, supporting automatic transmission of CG, etc.) are enhanced.

Release17 (R17) needs to consider supporting URLLC traffic in interference controlled NR-U scenarios. In particular, the manner of use of NR-U CG and ULRCC enhancements in NR-U scenarios may be considered. And considering an initial channel occupancy time (channel occupancy time, COT) of the frame-based device (Frame Based Equipment, FBE).

To facilitate a better understanding of embodiments of the present application, CG enhancement in URLLC relevant to the present application will be described.

In order to support the high delay requirement of URLLC service, the URLLC enhances CG period and supports the service period of any slot-level.

To support the high latency requirements of multiple URLLC services and URLLC services, URLLC incorporates multiple (multiple) CGs. The HARQ processes configured by different CG are different, and the process difference of the different CG is ensured by the HARQ process identification Offset2 (HARQ-ProcID-Offset 2).

Due to the existence of CG resources and other resource conflicts, in order to ensure that media access control protocol data units (Media Access Control Protocol Data Unit, MAC PDUs) already packetized in CG resources (i.e. non-prioritized MAC PDUs) are not discarded/transmitted as soon as possible, automatic transmission for CG is introduced. For CG of the packet MAC PDU, which cannot be transmitted due to resource collision, a new transmission may be performed using CG resources in the same CG configuration of the subsequent same HARQ process. The use of automatic transmission is determined by automatic transmission (autonomosutx).

If the physical layer priorities are different: with CG and CG collisions, the medium access control (Media Access Control, MAC) layer may instruct the physical layer of one or more MAC PDUs. Similarly, if there is a collision of data and scheduling requests (Scheduling Request, SR), the MAC layer may also instruct the SR and MAC PDU to the physical layer.

For a better understanding of the embodiments of the present application, NR-U relevant to the present application will be described.

NR operates in unlicensed bands, including the following several operating scenarios:

scene a: a carrier aggregation scene, in which a Primary Cell (PCell) is a licensed spectrum, and Secondary cells (scells) working on an unlicensed spectrum are aggregated by a carrier aggregation mode;

scene B: in a dual connection working scenario, the PCell is an LTE licensed spectrum, and the primary and secondary cells (Primary Secondary Cell, PSCell) are NR unlicensed spectrums;

scene C: an independent working scenario, where NR works as an independent cell in unlicensed spectrum;

scene D: NR single cell scene, uplink (UL) works in authorized spectrum, downlink (DL) works in unlicensed spectrum;

scene E: in a dual connection working scenario, PCell is NR licensed spectrum, and PScell is NR unlicensed spectrum.

Generally, the operating Band (Band) of NR-U is 5GHz unlicensed spectrum and 6GHz unlicensed spectrum. On unlicensed spectrum, the design of NR-U should ensure fairness with other systems already operating on these unlicensed spectrum, such as WiFi, etc. The principle of fairness is that the NR-U cannot have more impact on systems already deployed on unlicensed spectrum (such as WiFi) than between these systems.

In order to ensure fair coexistence between systems on unlicensed spectrum, energy detection has been agreed as a basic coexistence mechanism. The general energy detection mechanism is an LBT mechanism, and the basic principle of the mechanism is as follows: a base station or terminal (transmitting end) needs to listen for a period of time as specified before transmitting data on the unlicensed spectrum. If the result of interception indicates that the channel is in an idle state, the transmitting end can transmit data to the receiving end. If the interception result indicates that the channel is in an occupied state, the transmission end needs to intercept the channel again according to a set back-off period, and knows that the channel interception result is in an idle state, and then the transmission end can transmit data to the receiving end.

Four channel access mechanisms (category) are currently defined in the NR-U:

category 1: direct transport mechanism:

this mechanism is used for the transmission side to be able to transmit quickly after a switching gap (switching gap) within the COT;

switching gap refers to the Switching time for a received transmission, typically no more than 16us.

Category 2: listen-before-transmit (Listen Before Talk, LBT) mechanism that does not require random back-off:

this mechanism means that the time for the UE to listen to the channel is deterministic and is typically relatively short, such as 25us.

Category 3: random back-off LBT mechanism (contention window fixed):

in the LBT procedure, the transmitting side randomly goes a random value in the contention window to determine the time to listen to the channel.

Category 4: random back-off LBT mechanism (contention window not fixed):

in the LBT procedure, the transmission side randomly takes a random value in the contention window to determine the time to listen to the channel, and the contention window is variable.

To sum up, for a terminal, a base station needs to transmit data to the terminal within a maximum channel occupation time (maximum channel occupancy time, MCOT), if the base station does not preempt a channel, that is, outside the MCOT time, the terminal will not receive the scheduling data from the base station to the terminal.

To facilitate a better understanding of the embodiments of the present application, uplink LBT failures in NR-U related to the present application are described.

For uplink transmission initiated by the terminal device, the following categories are mainly included:

scheduling Request (SR): for requesting uplink resources;

physical random access channel (Physical Random Access Channel, PRACH) transmission: due to random access triggering, the terminal equipment needs to send a message1 (msg 1) in a four-step random access process;

Physical uplink shared channel (Physical Uplink Shared Channel, PUSCH) transmission: uplink data transmission based on CG and uplink data transmission based on dynamic grant (dynamic grant);

physical layer signaling: including ACK/NACK feedback, channel state information (Channel State Information, CSI) reporting, etc.;

on the unlicensed band, the terminal device needs to listen to whether the channel is available with LBT before transmitting SR, PRACH or PUSCH, and if not, i.e. LBT fails, the terminal device needs to wait until the next transmission opportunity to perform LBT again. If LBT failure is detected, information of LBT failure needs to be notified to the MAC layer.

In the case where CGRT or CG-UCI is not configured, if DFI indication is not received or DFI indication of NACK is received, the terminal-side behavior of how to perform transmission processing is ambiguous. And the consistency of the terminal and the network to the behavior understanding is not facilitated.

Based on the above problems, the present application proposes a retransmission scheme, where under the condition that CGRT or CG-UCI is not configured, but CG-DFI is configured, a retransmission mode is given to resources that are not successfully transmitted, or HARQ processes, or MAC PDUs, so that a receiving end can perform soft combining, thereby improving transmission efficiency and decoding success rate.

The technical scheme of the present application is described in detail below through specific embodiments.

Fig. 2 is a schematic flow chart of a method 200 of wireless communication according to an embodiment of the present application, as shown in fig. 2, the method 200 may include at least some of the following:

s210, retransmitting at least one of a target resource, a target HARQ process and a target MAC PDU by the terminal equipment under the condition that the first condition is met;

wherein the first condition includes at least one of:

the method comprises the steps that a DFI indicating NACK is received, a DFI indicating ACK is not received, an unfinished MAC PDU exists in a buffer, and the MAC PDU exists in the buffer.

In some embodiments, the retransmission includes at least one of:

the new data indication (New Data Indicator, NDI) does not flip, indicating that the HARQ process triggers retransmission, and the CGT is not restarted.

In some embodiments, the terminal device performs a new transmission on at least one of the target resource, the target HARQ process, and the target MAC PDU if the first condition is not satisfied.

For example, the new transmission is at least one of: and considering the NDI to overturn, acquiring the MAC PDU from the multiplexing packet entity, and indicating the HARQ process to trigger new transmission.

It should be noted that, the terminal device retransmitting or retransmitting the target resource may be understood as: and the terminal equipment uses the target resource to carry out retransmission or new transmission. The terminal device retransmits or newly transmits the target HARQ process, which can be understood as: and the terminal equipment uses the target HARQ process to carry out retransmission or new transmission. The terminal device retransmits or newly transmits the target MAC PDU, which can be understood as: the terminal device uses the target MAC PDU for retransmission or new transmission.

In some embodiments, S210 may specifically be:

if the first condition is met and the second condition is met, the terminal equipment retransmits at least one of the target resource, the target HARQ process and the target MAC PDU;

wherein the second condition includes, but is not limited to, at least one of:

operating in unlicensed band (unlicensed band) or shared spectrum (shared spectrum), not configuring CGRT, not configuring CG-UCI, configuring licensed downlink feedback information (Configured Grant Downlink Feedback Information, CG-DFI), configuring supported DFI, not configuring supported uplink control information (Uplink Control Information, UCI), configuring supported licensed timer (Configured Grant Timer, CGT), not receiving downlink control information (Downlink Control Information, DCI) indication for at least one of the target resource, the target HARQ process, the target MAC PDU, not receiving retransmission or retransmission for at least one of the target resource, the target HARQ process, the target MAC PDU.

In the second condition, the non-configuration of the UCI may mean: no UCI transmission on CG resources is supported, or no UCI multiplexing (multiplex) transmission on CG resources is supported.

In some embodiments, a network device (e.g., a gNB) allocates resources to a terminal device. The resource may be CG resource or DG resource. In addition, the network device may also configure the CGT and CG-DFI for the terminal device.

In some embodiments, S210 may specifically be:

and if the first condition is met in a first time period, the terminal equipment retransmits at least one of the target resource, the target HARQ process and the target MAC PDU.

In some embodiments, the first time length corresponds to a first timer or CGT;

the starting time of the first timer is the time of starting or restarting the CGT, and/or the duration of the first timer is less than or equal to the duration of the CGT.

In some embodiments, the first duration is a duration of the first timer, or the first duration is a duration of the CGT.

In some embodiments, the terminal device stops retransmission for the target information in case of receiving a DCI indication for the target information or in case of receiving a dynamic scheduling of retransmission or new transmission for the target information;

wherein the target information includes at least one of the target resource, the target HARQ process, and the target MAC PDU.

In some embodiments, the number of times the terminal device retransmits at least one of the target resource, the target HARQ process, and the target MAC PDU is one or M times, M does not exceed the maximum number of retransmissions, and M is a positive integer.

In some embodiments, the value of M is pre-configured or agreed upon by the protocol, or the value of M is configured or indicated by the network device.

In some embodiments, S210 may specifically be:

after a first time period, the terminal equipment uses CG resources to retransmit at least one of the target resources, the target HARQ process and the target MAC PDU; or alternatively, the process may be performed,

after the first time period and under the condition that the maximum retransmission times are not reached, the terminal equipment uses CG resources to retransmit at least one of the target resource, the target HARQ process and the target MAC PDU; or alternatively, the process may be performed,

after the first time period, the terminal equipment retransmits at least one of the target resource, the target HARQ process and the target MAC PDU by using CG resource in the second time period; or alternatively, the process may be performed,

and after the first time period and under the condition that the maximum retransmission times are not reached, the terminal equipment retransmits at least one of the target resource, the target HARQ process and the target MAC PDU by using CG resources in the second time period.

For example, the HARQ process of the CG resource is the same as the HARQ process of the target resource.

For example, the CG resource belongs to the same CG resource group as the target resource.

In some embodiments, the second time period is a time period of the CGT.

In some embodiments, the terminal device sends first indication information on the CG resource, where the first indication information is used to indicate that the transmission on the CG resource is a new transmission or a retransmission.

For example, the first indication information may be a medium access control element (Media Access Control Control Element, MAC CE) or other information, such as a radio resource control (Radio Resource Control, RRC) message, physical layer information (such as ports, codebooks, mapping methods, scrambling methods, etc.).

As an example of the present application, when the terminal device is operating in an unlicensed band or shared spectrum, if the CGRT or CG-UCI is not configured, but the CG-DFI is configured, and the CGT operation period corresponding to the target resource/target HARQ process/target MAC PDU is set, the terminal device receives the DFI indication as NACK, or does not receive the DFI indication, or does not receive the ACK indication, and after the CGT times out, the terminal device retransmits the target resource/target HARQ process/target MAC PDU. Optionally, for the target resource/target HARQ process/target MAC PDU, only X times, X being 1 or configured maximum number of times is transmitted.

As another example of the present application, when the terminal device is operating in an unlicensed band or shared spectrum, if CGRT or CG-UCI is not configured, but CG-DFI is configured, and the terminal device receives a DFI indication as NACK or does not receive a DFI indication or does not receive an ACK indication in a first duration (e.g. during a first timer) of a target resource/target HARQ process/target MAC PDU, and the terminal device retransmits the target resource/target HARQ process/target MAC PDU after the CGT of the first duration or the corresponding target resource/target HARQ process/target MAC PDU is overtime. Optionally, the first time period is less than the duration of the CGT. Optionally, for the target resource/target HARQ process/target MAC PDU, only X times, X being 1 or configured maximum number of times is transmitted.

As still another example of the present application, when the terminal device is operating in the licensed band or unshared spectrum, if the CGRT or CG-UCI is not configured, but the CG-DFI is configured, and after a first duration corresponding to the target resource/target HARQ process/target MAC PDU (e.g., the first timer expires or the CGT expires), it is considered that there is an MAC PDU that is not yet transmitted in the buffer (buffer), and retransmission is performed on the target resource/target HARQ process/target MAC PDU. Optionally, for the target resource/target HARQ process/target MAC PDU, only X times are transmitted, where X is 1 or the configured maximum number of times.

Therefore, in the embodiment of the present application, when CGRT or CG-UCI is not configured, but CG-DFI is configured, a manner of retransmitting at least one of an unsuccessful resource, HARQ process, and MAC PDU is provided, so that a receiving end may perform soft combining, thereby improving transmission efficiency and decoding success rate.

The method embodiment of the present application is described in detail above in connection with fig. 2, and the apparatus embodiment of the present application is described in detail below in connection with fig. 3 to 6, it being understood that the apparatus embodiment corresponds to the method embodiment, and similar descriptions may refer to the method embodiment.

Fig. 3 shows a schematic block diagram of a terminal device 300 according to an embodiment of the present application. As shown in fig. 3, the terminal device 300 includes: the communication unit 310 is configured to communicate with the communication unit,

in case the first condition is met, the communication unit 310 is configured to retransmit at least one of the target resource, the target HARQ process, and the target MAC PDU;

wherein the first condition includes at least one of:

In some embodiments, the communication unit 310 is specifically configured to:

Retransmitting at least one of the target resource, the target HARQ process, and the target MAC PDU if the first condition is satisfied and a second condition is satisfied;

wherein the second condition includes at least one of:

the method comprises the steps of working in an unlicensed frequency band or shared spectrum, not configuring CGRT, not configuring CG-UCI, configuring CG-DFI, configuring support DFI, not configuring support UCI, configuring support CGT, not receiving DCI indication aiming at least one of the target resource, the target HARQ process and the target MAC PDU, and not receiving retransmission or new transmission of dynamic scheduling aiming at least one of the target resource, the target HARQ process and the target MAC PDU.

In some embodiments, the communication unit 310 is specifically configured to:

and retransmitting at least one of the target resource, the target HARQ process and the target MAC PDU when the first condition is satisfied within a first time period.

In some embodiments, the terminal device 300 further comprises: the processing unit 320 is configured to process the data,

in case of receiving a DCI indication for the target information or in case of receiving a dynamically scheduled retransmission or new transmission for the target information, the processing unit 320 is configured to stop the retransmission for the target information;

In some embodiments, the communication unit 310 is specifically configured to:

retransmitting at least one of the target resource, the target HARQ process, and the target MAC PDU using CG resources after a first period of time; or alternatively, the process may be performed,

after a first time period and under the condition that the maximum retransmission times are not reached, retransmitting at least one of the target resource, the target HARQ process and the target MAC PDU by using CG resources; or alternatively, the process may be performed,

retransmitting at least one of the target resource, the target HARQ process and the target MAC PDU within a second time period by using CG resources after the first time period; or alternatively, the process may be performed,

and after the first time period and under the condition that the maximum retransmission times are not reached, retransmitting at least one of the target resource, the target HARQ process and the target MAC PDU by using the CG resource in the second time period.

In some embodiments, the HARQ process for the CG resource is the same as the HARQ process for the target resource.

In some embodiments, the CG resource and the target resource belong to the same CG resource group.

In some embodiments, the second time period is a time period of the CGT.

In some embodiments, the communication unit 310 is further configured to send first indication information on the CG resource, where the first indication information is used to indicate that the transmission on the CG resource is a new transmission or a retransmission.

In some embodiments, the first time length corresponds to a first timer or CGT;

In some embodiments, the retransmission includes at least one of:

NDI does not flip, indicating HARQ process to trigger retransmission, and not restarting CGT.

In some embodiments, the communication unit may be a communication interface or transceiver, or an input/output interface of a communication chip or a system on a chip. The processing unit may be one or more processors.

It should be understood that the terminal device 300 according to the embodiment of the present application may correspond to the terminal device in the embodiment of the method of the present application, and the foregoing and other operations and/or functions of each unit in the terminal device 300 are respectively for implementing the corresponding flow of the terminal device in the method 200 shown in fig. 2, which is not described herein for brevity.

Fig. 4 is a schematic structural diagram of a communication device 400 provided in an embodiment of the present application. The communication device 400 shown in fig. 4 comprises a processor 410, from which the processor 410 may call and run a computer program to implement the method in the embodiments of the present application.

In some embodiments, as shown in fig. 4, communication device 400 may also include memory 420. Wherein the processor 410 may call and run a computer program from the memory 420 to implement the methods in embodiments of the present application.

Wherein the memory 420 may be a separate device from the processor 410 or may be integrated into the processor 410.

In some embodiments, as shown in fig. 4, the communication device 400 may further include a transceiver 430, and the processor 410 may control the transceiver 430 to communicate with other devices, and in particular, may transmit information or data to other devices, or receive information or data transmitted by other devices.

Among other things, transceiver 430 may include a transmitter and a receiver. Transceiver 430 may further include antennas, the number of which may be one or more.

In some embodiments, the communication device 400 may be specifically a network device in the embodiments of the present application, and the communication device 400 may implement corresponding flows implemented by the network device in the methods in the embodiments of the present application, which are not described herein for brevity.

In some embodiments, the communication device 400 may be specifically a terminal device in the embodiments of the present application, and the communication device 400 may implement a corresponding flow implemented by the terminal device in each method in the embodiments of the present application, which is not described herein for brevity.

Fig. 5 is a schematic structural view of an apparatus of an embodiment of the present application. The apparatus 500 shown in fig. 5 includes a processor 510, and the processor 510 may call and run a computer program from a memory to implement the methods in the embodiments of the present application.

In some embodiments, as shown in fig. 5, the apparatus 500 may further include a memory 520. Wherein the processor 510 may call and run a computer program from the memory 520 to implement the methods in embodiments of the present application.

Wherein the memory 520 may be a separate device from the processor 510 or may be integrated into the processor 510.

In some embodiments, the apparatus 500 may further include an input interface 530. The processor 510 may control the input interface 530 to communicate with other devices or chips, and in particular, may obtain information or data sent by other devices or chips.

In some embodiments, the apparatus 500 may further include an output interface 540. Wherein the processor 510 may control the output interface 540 to communicate with other devices or chips, and in particular may output information or data to other devices or chips.

In some embodiments, the apparatus may be applied to a network device in the embodiments of the present application, and the apparatus may implement corresponding flows implemented by the network device in each method in the embodiments of the present application, which are not described herein for brevity.

In some embodiments, the apparatus may be applied to a terminal device in the embodiments of the present application, and the apparatus may implement a corresponding flow implemented by the terminal device in each method in the embodiments of the present application, which is not described herein for brevity.

In some embodiments, the device mentioned in the embodiments of the present application may also be a chip. For example, a system-on-chip or a system-on-chip, etc.

Fig. 6 is a schematic block diagram of a communication system 600 provided by an embodiment of the present application. As shown in fig. 6, the communication system 600 includes a terminal device 610 and a network device 620.

The terminal device 610 may be used to implement the corresponding functions implemented by the terminal device in the above method, and the network device 620 may be used to implement the corresponding functions implemented by the network device in the above method, which are not described herein for brevity.

It should be appreciated that the processor of an embodiment of the present application may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method embodiments may be implemented by integrated logic circuits of hardware in a processor or instructions in software form. The processor may be a general purpose processor, a digital signal processor (Digital Signal Processor, DSP), an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), an off-the-shelf programmable gate array (Field Programmable Gate Array, FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware components. The disclosed methods, steps, and logic blocks in the embodiments of the present application may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of a method disclosed in connection with the embodiments of the present application may be embodied directly in hardware, in a decoded processor, or in a combination of hardware and software modules in a decoded processor. The software modules may be located in a random access memory, flash memory, read only memory, programmable read only memory, or electrically erasable programmable memory, registers, etc. as well known in the art. The storage medium is located in a memory, and the processor reads the information in the memory and, in combination with its hardware, performs the steps of the above method.

It will be appreciated that the memory in embodiments of the present application may be either volatile memory or nonvolatile memory, or may include both volatile and nonvolatile memory. The nonvolatile Memory may be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically Erasable EPROM (EEPROM), or a flash Memory. The volatile memory may be random access memory (Random Access Memory, RAM) which acts as an external cache. By way of example, and not limitation, many forms of RAM are available, such as Static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double Data Rate SDRAM (Double Data Rate SDRAM), enhanced SDRAM (ESDRAM), synchronous DRAM (SLDRAM), and Direct 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.

It should be understood that the above memory is exemplary but not limiting, and for example, the memory in the embodiments of the present application may be Static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchronous Link DRAM (SLDRAM), direct RAM (DR RAM), and the like. That is, the memory in embodiments of the present application is intended to comprise, without being limited to, these and any other suitable types of memory.

Embodiments of the present application also provide a computer-readable storage medium for storing a computer program.

Optionally, the computer readable storage medium may be applied to a network device in the embodiments of the present application, and the computer program causes a computer to execute a corresponding flow implemented by the network device in each method in the embodiments of the present application, which is not described herein for brevity.

In some embodiments, the computer readable storage medium may be applied to a terminal device in the embodiments of the present application, and the computer program causes a computer to execute corresponding processes implemented by the terminal device in the methods in the embodiments of the present application, which are not described herein for brevity.

Embodiments of the present application also provide a computer program product comprising computer program instructions.

Optionally, the computer program product may be applied to a network device in the embodiments of the present application, and the computer program instructions cause the computer to execute corresponding flows implemented by the network device in the methods in the embodiments of the present application, which are not described herein for brevity.

In some embodiments, the computer program product may be applied to a terminal device in an embodiment of the present application, and the computer program instructions cause the computer to execute corresponding processes implemented by the terminal device in each method in the embodiment of the present application, which are not described herein for brevity.

The embodiment of the application also provides a computer program.

Optionally, the computer program may be applied to a network device in the embodiments of the present application, and when the computer program runs on a computer, the computer is caused to execute a corresponding flow implemented by the network device in each method in the embodiments of the present application, which is not described herein for brevity.

In some embodiments, the computer program may be applied to a terminal device in the embodiments of the present application, and when the computer program runs on a computer, the computer is caused to execute corresponding processes implemented by the terminal device in the methods in the embodiments of the present application, which are not described herein for brevity.

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

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

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

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

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

The 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. For such understanding, the technical solutions of the present application may be embodied in essence or in a part contributing to the prior art or in the form of a software product stored in a storage medium, including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a magnetic disk, or an optical disk, or other various media capable of storing program codes.

The foregoing is merely specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily think about changes or substitutions within the technical scope of the present application, and the changes and substitutions are intended to be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

A method of wireless communication, comprising:

under the condition that the first condition is met, retransmitting at least one of target resources, a target hybrid automatic repeat request (HARQ) process and a target Media Access Control (MAC) protocol data unit (MAC PDU) by the terminal equipment;

wherein the first condition includes at least one of:

and receiving downlink feedback information DFI indicating negative acknowledgement NACK, not receiving DFI indication, not receiving DFI indicating positive acknowledgement ACK, and buffering the MAC PDU with unfinished transmission and the MAC PDU.
The method of claim 1, wherein the terminal device retransmitting at least one of the target resource, the target HARQ process, and the target MAC PDU if the first condition is satisfied, comprising:

The terminal equipment retransmits at least one of the target resource, the target HARQ process and the target MAC PDU under the condition that the first condition is met and the second condition is met;

wherein the second condition includes at least one of:

working in an unlicensed frequency band or shared spectrum, not configuring a grant weight transmission timer CGRT, not configuring grant uplink control information CG-UCI, configuring grant downlink feedback information CG-DFI, configuring support DFI, not configuring support uplink control information UCI, configuring support grant timer CGT, not receiving downlink control information DCI indication aiming at least one of the target resource, the target HARQ process and the target MAC PDU, and not receiving retransmission or retransmission aiming at least one of the target resource, the target HARQ process and the target MAC PDU by dynamic scheduling.
The method according to claim 1 or 2, wherein the terminal device retransmitting at least one of the target resource, the target HARQ process, the target MAC PDU, if the first condition is satisfied, comprises:

and under the condition that the first condition is met in a first duration, retransmitting at least one of the target resource, the target HARQ process and the target MAC PDU by the terminal equipment.
A method according to any one of claims 1 to 3, wherein the method further comprises:

in the case of receiving a DCI indication for target information, or in the case of receiving a dynamic scheduling of retransmission or new transmission for target information, the terminal device stops retransmission for the target information;

wherein the target information includes at least one of the target resource, the target HARQ process, and the target MAC PDU.
The method according to any one of claim 1 to 4,

and the number of times of retransmitting at least one of the target resource, the target HARQ process and the target MAC PDU by the terminal equipment is one time or M times, M does not exceed the maximum retransmission number, and M is a positive integer.
The method of claim 5, wherein the value of M is pre-configured or agreed upon by a protocol, or wherein the value of M is configured or indicated by a network device.
The method according to any of claims 1 to 6, wherein the terminal device retransmitting at least one of a target resource, a target HARQ process, a target MAC PDU, comprises:

after a first time period, the terminal equipment retransmits at least one of the target resource, the target HARQ process and the target MAC PDU by using a configuration grant CG resource; or alternatively, the process may be performed,

After a first time period and under the condition that the maximum retransmission times are not reached, retransmitting at least one of the target resource, the target HARQ process and the target MAC PDU by using CG resources by the terminal equipment; or alternatively, the process may be performed,

after the first time period, the terminal equipment retransmits at least one of the target resource, the target HARQ process and the target MAC PDU by using CG resources in a second time period; or alternatively, the process may be performed,

and after the first time period and under the condition that the maximum retransmission times are not reached, retransmitting at least one of the target resource, the target HARQ process and the target MAC PDU by using CG resources in the second time period.
The method of claim 7, wherein the HARQ process for the CG resource is the same as the HARQ process for the target resource.
The method of claim 7 or 8, wherein the CG resource belongs to the same CG resource group as the target resource.
The method of any one of claims 7 to 9, wherein the second duration is a duration of CGT.
The method of any one of claims 7 to 10, wherein the method further comprises:

And the terminal equipment sends first indication information on the CG resource, wherein the first indication information is used for indicating that the transmission on the CG resource is new transmission or retransmission.
The method according to any one of claim 3, 7 to 11,

the first time length corresponds to a first timer or a CGT;

the starting time of the first timer is the time of starting or restarting the CGT, and/or the duration of the first timer is less than or equal to the duration of the CGT.
The method of claim 12, wherein,

the first duration is the duration of the first timer, or the first duration is the duration of the CGT.
The method of any of claims 1 to 13, wherein the retransmission comprises at least one of:

the new data indicates that the NDI is not flipped, indicates that the HARQ process triggers retransmission, and does not restart the CGT.
A terminal device, comprising: the communication unit is configured to communicate with the communication unit,

the communication unit is used for retransmitting at least one of a target resource, a target hybrid automatic repeat request (HARQ) process and a target Media Access Control (MAC) protocol data unit (MAC PDU) under the condition that a first condition is met;

Wherein the first condition includes at least one of:

and receiving downlink feedback information DFI indicating negative acknowledgement NACK, not receiving DFI indication, not receiving DFI indicating positive acknowledgement ACK, and buffering the MAC PDU with unfinished transmission and the MAC PDU.
The terminal device of claim 15, wherein the communication unit is specifically configured to:

retransmitting at least one of the target resource, the target HARQ process, and the target MAC PDU if the first condition is satisfied and a second condition is satisfied;

wherein the second condition includes at least one of:

working in an unlicensed frequency band or shared spectrum, not configuring a grant weight transmission timer CGRT, not configuring grant uplink control information CG-UCI, configuring grant downlink feedback information CG-DFI, configuring support DFI, not configuring support uplink control information UCI, configuring support grant timer CGT, not receiving downlink control information DCI indication aiming at least one of the target resource, the target HARQ process and the target MAC PDU, and not receiving retransmission or retransmission aiming at least one of the target resource, the target HARQ process and the target MAC PDU by dynamic scheduling.
Terminal device according to claim 15 or 16, wherein the communication unit is specifically configured to:

and retransmitting at least one of the target resource, the target HARQ process and the target MAC PDU under the condition that the first condition is met in a first duration.
The terminal device according to any of the claims 15 to 17, wherein the terminal device further comprises: the processing unit is used for processing the processed data,

in case of receiving a DCI indication for target information or in case of receiving a dynamically scheduled retransmission or new transmission for target information, the processing unit is configured to stop the retransmission for the target information;

wherein the target information includes at least one of the target resource, the target HARQ process, and the target MAC PDU.
The terminal device according to any of the claims 15 to 18, characterized in that,

and the number of times of retransmitting at least one of the target resource, the target HARQ process and the target MAC PDU by the terminal equipment is one time or M times, M does not exceed the maximum retransmission number, and M is a positive integer.
The terminal device of claim 19, wherein the value of M is pre-configured or agreed upon by a protocol, or wherein the value of M is configured or indicated by a network device.
Terminal device according to any of the claims 15 to 20, wherein the communication unit is specifically adapted to:

retransmitting at least one of the target resource, the target HARQ process, and the target MAC PDU using a configuration grant CG resource after a first time period; or alternatively, the process may be performed,

retransmitting at least one of the target resource, the target HARQ process and the target MAC PDU by using CG resource after the first time period and under the condition that the maximum retransmission times are not reached; or alternatively, the process may be performed,

retransmitting at least one of the target resource, the target HARQ process and the target MAC PDU by using CG resource in a second time period after the first time period; or alternatively, the process may be performed,

and after the first time period and under the condition that the maximum retransmission times are not reached, retransmitting at least one of the target resource, the target HARQ process and the target MAC PDU by using CG resources in the second time period.
The terminal device of claim 21, wherein the HARQ process of the CG resource is the same as the HARQ process of the target resource.
The terminal device according to claim 21 or 22, wherein the CG resource belongs to the same CG resource group as the target resource.
A terminal device according to any of claims 21 to 23, wherein the second duration is a duration of a CGT.
The terminal device according to any of the claims 21 to 24, wherein the communication unit is further configured to send a first indication information on the CG resource, wherein the first indication information is configured to indicate that the transmission on the CG resource is a new transmission or a retransmission.
The terminal device according to any one of claims 17, 21 to 25, characterized in that,

the first time length corresponds to a first timer or a CGT;

the starting time of the first timer is the time of starting or restarting the CGT, and/or the duration of the first timer is less than or equal to the duration of the CGT.
The terminal device of claim 26, wherein,

the first duration is the duration of the first timer, or the first duration is the duration of the CGT.
The terminal device according to any of the claims 15 to 27, wherein the retransmission comprises at least one of:

the new data indicates that the NDI is not flipped, indicates that the HARQ process triggers retransmission, and does not restart the CGT.
A terminal device, comprising: a processor and a memory for storing a computer program, the processor being for invoking and running the computer program stored in the memory, performing the method of any of claims 1 to 14.
A chip, comprising: a processor for calling and running a computer program from a memory, causing a device on which the chip is mounted to perform the method of any one of claims 1 to 14.
A computer readable storage medium storing a computer program for causing a computer to perform the method of any one of claims 1 to 14.
A computer program product comprising computer program instructions for causing a computer to perform the method of any one of claims 1 to 14.
A computer program, characterized in that the computer program causes a computer to perform the method according to any one of claims 1 to 14.