CN111316587A

CN111316587A - Hybrid automatic repeat request method, network equipment and terminal

Info

Publication number: CN111316587A
Application number: CN201880071306.2A
Authority: CN
Inventors: 徐凯; 李晓翠
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2018-03-28
Filing date: 2018-05-16
Publication date: 2020-06-19
Also published as: WO2019184061A1

Abstract

The embodiment of the invention provides a hybrid automatic repeat request method, which comprises the following steps: the network equipment sends indication information to a terminal, wherein the indication information comprises time window information used for indicating the terminal to carry out HARQ retransmission on an unauthorized carrier, and the terminal allows multiple attempts to access a channel within the time window. The method can increase the opportunity of the terminal to access the channel, increase the probability of successful retransmission, reduce the load of the communication network and improve the throughput of the communication system.

Description

Hybrid automatic repeat request method, network equipment and terminal

The present application claims priority of chinese patent application with application number 201810265827.3, entitled "HARQ transmission method suitable for unlicensed carrier automatic uplink access" filed in 28/03/2018 by the chinese patent office, the entire contents of which are incorporated herein by reference.

Technical Field

The present invention relates to the field of mobile communications, and in particular, to a hybrid automatic repeat request method, a network device, and a terminal.

Background

The spectrum used by a wireless communication system is divided into licensed spectrum (licensed spectrum) and unlicensed spectrum (unlicensed spectrum). For mobile communication systems for commercial applications, operators need to auction licensed spectrum; and after the user obtains the authorization, the corresponding frequency spectrum is used for carrying out mobile communication activities. Unlicensed spectrum does not require auctions and any user can legally use these bands.

In the prior art, in order to meet the increasing wireless communication demand of users, a Licensed Assisted Access (LAA) technology using an unlicensed spectrum in a Long Term Evolution (LTE) network is proposed, and is denoted as LTE LAA. Since the unlicensed spectrum can be legally used by any user, a contention access mechanism of Listen Before Talk (LBT) needs to be adopted when a terminal (UE) in the LTE LAA transmits uplink data using the unlicensed spectrum. At present, when a terminal in LTE LAA needs to transmit uplink data using an unlicensed spectrum, it needs to send a scheduling request to a base station, and then, according to uplink scheduling information received from the base station, seize a channel on a corresponding unlicensed spectrum resource by using a contention access mechanism of LBT, and if the channel is successfully seized, transmit the uplink data on a corresponding unlicensed carrier.

After receiving uplink data, a base station needs to feed back hybrid automatic repeat request-acknowledgement (HARQ-ACK) information to a terminal, and if the terminal receives (NACK) information sent by the base station, the terminal needs to preempt a channel and retransmit corresponding data.

Disclosure of Invention

The embodiment of the invention provides a hybrid automatic repeat request method, network equipment and a terminal, wherein the method allows the terminal to try to access a channel for multiple times, so that the probability of successful repeat in uplink data transmission is improved.

In a first aspect, a hybrid automatic repeat request (HARQ) method is provided. The network equipment sends indication information to a terminal, wherein the indication information comprises time window information used for indicating the terminal to carry out HARQ retransmission on an unauthorized carrier, and the terminal allows multiple attempts to access a channel within the time window.

In the embodiment of the invention, the network equipment sends the time window information for indicating the terminal to carry out HARQ retransmission on the unauthorized carrier to the terminal, so that the terminal can try to access the channel for multiple times in the time window. On one hand, the probability of successful retransmission during uplink data transmission is improved; on the other hand, the network equipment is not required to send the scheduling information to the terminal for multiple times, and the load of the communication network can be reduced.

In a possible implementation, the network device sends the indication information to the terminal through radio resource control signaling or broadcast information. According to the embodiment, the mode of configuring the time window for the terminal through the radio resource control signaling or the broadcast information belongs to semi-static configuration, so that the size of the time window configured for each retransmission in a period of time is the same, and the probability of successful retransmission can be further increased.

In a possible implementation manner, the network device sends the indication information to the terminal through downlink control information in a physical downlink control channel. According to the embodiment, because the mode of configuring the time window for the terminal through the downlink control information belongs to dynamic configuration, the size of the time window can be flexibly configured according to the condition of the network equipment, so that each retransmission more conforms to the state of the network equipment, and the probability of successful retransmission can be further increased.

In a possible implementation manner, before the network device sends the indication information to the terminal through downlink control information in a physical downlink control channel, the network device scrambles the downlink control information by using a radio network temporary identifier corresponding to automatic uplink transmission. According to the embodiment, the scrambling information can enable the network equipment to select the terminal which meets certain conditions and meets the network equipment scheduling for data transmission, increase the probability of successful retransmission of the specific terminal and reduce the load of the communication network.

In a second aspect, a HARQ method is provided. A terminal receives indication information from a network device, wherein the indication information comprises time window information used for indicating the terminal to carry out HARQ retransmission on an unauthorized carrier; and when the terminal fails to attempt to access the channel within the time window, the terminal tries to access the channel again.

In the embodiment of the invention, the terminal receives time window information for indicating the terminal to carry out HARQ retransmission on the unauthorized carrier from the network equipment, and the terminal tries to access the channel again when trying to access the channel in the time window fails. On one hand, the probability of successful retransmission during uplink data transmission is improved; on the other hand, the terminal does not need to receive the scheduling information from the network equipment for multiple times, and the load of the communication network can be reduced.

In a possible implementation, the terminal receives the indication information from the network device through radio resource control signaling or broadcast information. According to the embodiment, the mode of configuring the time window for the terminal through the radio resource control signaling or the broadcast information belongs to semi-static configuration, so that the size of the time window configured for each retransmission in a period of time is the same, and the probability of successful retransmission can be further increased.

In a possible implementation manner, the terminal receives the indication information from the network device through downlink control information in a physical downlink control channel. According to the embodiment, because the mode of configuring the time window for the terminal through the downlink control information belongs to dynamic configuration, the size of the time window can be flexibly configured according to the condition of the network equipment, so that each retransmission more conforms to the state of the network equipment, and the probability of successful retransmission can be further increased.

In a possible implementation manner, before the terminal receives the indication information from the network device through the downlink control information in the physical downlink control channel, the terminal descrambles the downlink control information by using a radio network temporary identifier corresponding to the automatic uplink transmission. According to the embodiment, the scrambling information can enable the network equipment to select the terminal which meets certain conditions and meets the network equipment scheduling for data transmission, increase the probability of successful retransmission of the specific terminal and reduce the load of the communication network.

In a third aspect, an embodiment of the present invention provides a network device, where the network device may implement the function executed in the method design in the first aspect, where the function may be implemented by hardware, or may be implemented by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above-described functions.

In one possible design, the network device includes a processor configured to support the network device to perform the corresponding functions in the method of the first aspect. The network device may also include a memory, coupled to the processor, that stores program instructions and data necessary for the network device. The network device may also include a communication interface for sending or receiving information or the like.

In a fourth aspect, an embodiment of the present invention provides a terminal, where the terminal may implement the function executed in the method design in the second aspect, where the function may be implemented by hardware, or may be implemented by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above-described functions.

In one possible design, the terminal includes a processor in its structure, and the processor is configured to support the terminal to execute the corresponding functions in the method of the second aspect. The terminal may also include a memory, coupled to the processor, that retains program instructions and data necessary for the terminal. The terminal may also include a communication interface for sending or receiving information or the like.

In a fifth aspect, embodiments of the present invention provide a communication device, which may be, for example, a chip, which may be disposed in a terminal, and which includes a processor and an interface. The processor is configured to enable the communication device to perform the respective functions of the method of any of the first to second aspects. The interface is used to support communication between the communication device and other communication devices or other network elements. The communication device may also include a memory, coupled to the processor, that retains program instructions and data necessary for the communication device.

In a sixth aspect, an embodiment of the present invention provides a computer storage medium, having stored therein instructions, which, when run on a computer, cause the computer to perform the method of any one of the first to second aspects.

In a seventh aspect, an embodiment of the present invention provides a computer program or a computer program product, which contains instructions, when the program is executed by a computer, the instructions make the computer execute the method described in any one of the first aspect to the second aspect.

Drawings

Fig. 1 is a schematic view of an application scenario based on a hybrid automatic repeat request method according to an embodiment of the present invention;

fig. 2 is a communication diagram of an HARQ method according to an embodiment of the present invention;

fig. 3 is a communication diagram of another HARQ method according to an embodiment of the present invention;

FIG. 4 is a timing diagram corresponding to the embodiment shown in FIG. 3;

fig. 5 is a communication diagram of another HARQ method according to an embodiment of the present invention;

FIG. 6 is a timing diagram corresponding to the embodiment shown in FIG. 5;

fig. 7 is a schematic diagram of a possible structure of a network device according to an embodiment of the present invention;

fig. 8 is a schematic diagram of another possible structure of a network device according to an embodiment of the present invention;

fig. 9 is a schematic structural diagram of a communication device according to an embodiment of the present invention;

fig. 10 is a schematic diagram of a possible structure of a terminal according to an embodiment of the present invention;

fig. 11 is a schematic diagram of another possible structure of a terminal according to an embodiment of the present invention;

fig. 12 is a schematic structural diagram of another communication device according to an embodiment of the present invention.

Detailed Description

The network element related to the embodiment of the application comprises network equipment and a terminal. The network device is an access device in which the terminal is accessed to the mobile communication system in a Wireless manner, and may be a base station, an evolved NodeB (eNodeB), a base station in a 5G mobile communication system, a base station in a future mobile communication system, or an access node in a Wireless Fidelity (WiFi) system, and the like.

A Terminal may also be referred to as User Equipment (UE), Terminal Equipment (TE), Mobile Station (MS), Mobile Terminal (MT), 5G UE, and the like. 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 (AR) terminal device, a wireless terminal in industrial control (industrial control), a wireless terminal in self-driving (self-driving), a wireless terminal in remote surgery (remote medical supply), a wireless terminal in smart grid (smart grid), a wireless terminal in transportation safety (transportation safety), a wireless terminal in smart city (smart city), a wireless terminal in smart home (smart home), and the like, which are not limited in this application.

Fig. 1 is a schematic view of an application scenario based on a hybrid automatic repeat request (HARQ) method according to an embodiment of the present invention. Referring to fig. 1, in an uplink transmission process between a terminal 101 and a network device 102, first, the network device 102 configures a time-frequency resource to the terminal 101, then the terminal 101 sends data to the network device 102 through the time-frequency resource, and the network device 102 receives the data from the terminal 101 and feeds back ACK/NACK information to the terminal 101. If the feedback information is ACK, which indicates that the network device 102 successfully receives the data, the network device 102 continues to receive new data from the terminal 101. If the feedback information is NACK, which indicates that the network device 102 fails to receive the data, the terminal 101 needs to retransmit the data.

In the embodiment of the invention, in order to improve the autonomy of the terminal in the LTE LAA for transmitting the uplink data by using the unlicensed spectrum, an Automatic Uplink (AUL) transmission technology is adopted. Based on the AUL transmission technology, when the terminal 101 sends uplink data in the unlicensed spectrum, it is not necessary to send a scheduling request to the network device 102 (e.g., a base station), and the terminal may directly send the uplink data after preempting a channel on the unlicensed spectrum resource by using a contention access mechanism of LBT.

Based on the AUL transmission technique, the terminal 101 retransmits the data within a time window, and the network device 102 re-receives the data transmitted by the terminal 101 within the time window. The terminal 101 configures the size of the time window according to the indication information received from the network device 102.

For AUL transmission, because the transmission of the terminal is not limited by the scheduling of the network device, the network device may not determine the retransmission time of the terminal, and thus the network load is heavy. Therefore, to solve this problem, a time window may be set and the size of the time window should be within a certain range, within the time window, the terminal may access the channel many times, and once LBT succeeds, the data is retransmitted, which may increase the probability of the terminal accessing the channel while reducing the network load.

Fig. 2 is a communication schematic diagram of an HARQ method provided in an embodiment of the present invention, where the method may be based on the application scenario shown in fig. 1, and the method includes:

step 201, a network device sends indication information to a terminal, where the indication information includes time window information for indicating the terminal to perform HARQ retransmission on an unlicensed carrier.

And the terminal allows a plurality of attempts to access the channel in the time window indicated by the time window information.

And step 202, when the terminal fails to attempt to access the channel in the time window indicated by the time window information, the terminal attempts to access the channel again.

It can be understood that, after the terminal successfully accesses the channel within the time window, the terminal retransmits the data through the accessed channel.

For AUL transmission, the terminal may autonomously decide retransmission, or the base station may schedule retransmission. The above two cases are described below by way of examples.

Fig. 3 is a communication schematic diagram of another HARQ method provided in an embodiment of the present invention, where the method autonomously determines retransmission by a terminal, and sends the indication information to the terminal through radio resource control signaling or broadcast information, and the method includes:

step 301, a network device sends indication information to a terminal through a radio resource control signaling or broadcast information, where the indication information includes time window information for indicating the terminal to perform HARQ retransmission on an unlicensed carrier.

Step 302, the network device sends configuration information to the terminal, where the configuration information is used to configure the AUL resource.

Step 303, the terminal sends the AUL data to the network device through the AUL resource.

Step 304, the network device feeds back NACK information to the terminal.

It is understood that the network device may also feed back ACK information to the terminal, and when the terminal receives the ACK information from the network device, the terminal continues to transmit the AUL data on the predetermined resources.

And 305, the terminal receives NACK information from the network equipment, and the terminal tries to access the channel again when the terminal fails to try to access the channel in the time window indicated by the time window information.

Step 306, retransmitting the AUL data through the accessed channel.

In the embodiment of the invention, the mode of configuring the time window for the terminal through the radio resource control signaling or the broadcast information belongs to semi-static configuration, so that the size of the time window configured for each retransmission in a period of time is the same, and the probability of successful retransmission can be further increased.

Fig. 4 is a timing diagram corresponding to the embodiment shown in fig. 3. Referring to fig. 4, a time window N +8 to N +12 is configured, and a terminal may perform multiple channel accesses within the window. As illustrated in the figure, the terminal attempts to access the channel at N +8 subframes, but fails to access the channel, resulting in failure of the terminal to retransmit data; at N +10 subframes, the terminal tries to access the channel again, and access the channel is successful, the terminal retransmits the data at N +10 subframes. Therefore, the probability of the terminal accessing the channel is increased, the probability of successful retransmission is increased, and the load of the communication network is reduced. In this embodiment, the indication information is sent to the terminal through a radio resource control signaling or broadcast information, where the indication information includes time window information for retransmitting data by the terminal, and since the radio resource control signaling or broadcast information is configured in a semi-static manner, the time windows configured for each retransmission within a period of time are the same in size, and the probability of successful retransmission is increased. For example, when data needs to be retransmitted again, a time window with a time length of 5 subframes as shown in fig. 4 is continuously configured from the retransmission time, and the previous steps are repeated.

Fig. 5 is a schematic communication diagram of another HARQ method provided in an embodiment of the present invention, where the method schedules retransmission by a base station, and sends the indication information to the terminal through downlink control information in a physical downlink control channel, and the method includes:

step 501, the network device sends configuration information to the terminal, where the configuration information is used to configure the AUL resource.

In step 502, the terminal sends the AUL data through the AUL resource.

Step 503, the network device feeds back NACK information and indication information to the terminal, where the indication information includes time window information used for indicating the terminal to perform HARQ retransmission on an unlicensed carrier.

In one example, the network device may send the indication information before feeding back the NACK information, or send the indication information while feeding back the NACK information, where the indication information is used to configure a time window, and the size of the time window is a time length of a plurality of subframes.

And step 504, when the terminal fails to attempt to access the channel in the time window indicated by the time window information, the terminal tries to access the channel again.

And 505, the terminal retransmits the AUL data through the accessed channel.

Fig. 6 is a timing diagram corresponding to the embodiment shown in fig. 5. Referring to fig. 6, a time window N +8 to N +12 is configured, and a terminal may perform multiple channel accesses within the window. As illustrated in the figure, the terminal attempts to access the channel at N +8 subframes, but fails to access the channel, resulting in failure of the terminal to retransmit data; at N +10 subframes, the terminal tries to access the channel again, and access the channel is successful, the terminal retransmits the data at N +10 subframes. Therefore, the probability of the terminal accessing the channel is increased, the probability of successful retransmission is increased, and the load of the communication network is reduced. In this embodiment, the network device sends the indication information while feeding back the NACK information, and the network device sends the indication information to the terminal through the downlink control information in the physical downlink control channel. The indication information is used for configuring a time window, and the size of the time window is configured according to information such as the service type or the data priority when NACK information is fed back each time, and the size of the time window is the time length of a plurality of subframes.

In one example, the base station is idle for N +8 to N +10 subframes, and then a time window with a time length of 3 subframes, i.e. N +8 to N +10, is configured from the retransmission time, and the terminal tries to access the channel multiple times in the time window to retransmit the first data. When the base station feeds back NACK information to the user again, the network equipment configures a time window according to information such as the service type or the data priority and the like, and sends the time window to the terminal through downlink control information, and the terminal retransmits the first data in the time window. The time window configuration according to the downlink resource control information is more flexible than the time window configuration according to the radio resource control signaling or the broadcast signaling, and the network equipment can instruct the terminal to retransmit the first data in a specific time window according to the information such as the service type or the data priority when the network equipment feeds back NACK information to the user every time.

In one example, the network device scrambles the downlink control information by using the radio network temporary identifier corresponding to the automatic uplink transmission, and the terminal descrambles the physical downlink control channel by using the radio network temporary identifier corresponding to the automatic uplink transmission, so as to obtain the downlink control information from the physical downlink control channel. The network device selects to receive data transmitted by a specific terminal. In a time window, the network equipment receives data information of a plurality of terminals, and the base station selects a specific target terminal for data transmission according to information such as service types or data priorities contained in the scrambling information. The downlink control information is dynamic notification, which is more flexible than radio resource control signaling or broadcast information.

The above description mainly introduces the scheme of the embodiment of the present invention from the perspective of the method flow. It is to be understood that each network element, such as a terminal, etc., for implementing the above functions, includes corresponding hardware structures and/or software modules for performing the respective functions. Those of skill in the art will readily appreciate that the present invention can be implemented in hardware or a combination of hardware and computer software, with the exemplary elements and algorithm steps described in connection with the embodiments disclosed herein. Whether a function is performed as hardware or computer software drives hardware depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.

In the embodiment of the present invention, the network device, the terminal, and the like may be divided into functional modules according to the above method examples, for example, each functional module may be divided corresponding to each function, or two or more functions may be integrated into one processing module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. It should be noted that, the division of the modules in the embodiment of the present invention is schematic, and is only a logic function division, and there may be another division manner in actual implementation.

Fig. 7 shows a schematic diagram of a possible structure of the network device involved in the above embodiments, in the case of integrated modules. The network device 700 includes: a processing module 702 and a communication module 703. Processing module 702 is used to control and manage the actions of the network device, e.g., processing module 702 is used to support the network device in performing the processes of fig. 2-6, and/or other processes for the techniques described herein. The communication module 703 is used to support communication between the network device and other network entities, for example, communication with a terminal. The network device may also include a storage module 701 for storing program codes and data for the network device.

A communication module 703, configured to send indication information to a terminal, where the indication information includes time window information used to indicate the terminal to perform HARQ retransmission on an unlicensed carrier, and the terminal allows multiple attempts to access a channel within the time window.

In an example, the communication module 703 is specifically configured to send the indication information to the terminal through radio resource control signaling or broadcast information.

In an example, the communication module 703 is specifically configured to send the indication information to the terminal through downlink control information in a physical downlink control channel.

In an example, the processing module 702 is configured to scramble the downlink control information by using a radio network temporary identifier corresponding to automatic uplink transmission before the communication module 703 sends the indication information to the terminal through the downlink control information in a physical downlink control channel.

In the embodiment of the present invention, the communication module 703 sends, to the terminal, time window information for instructing the terminal to perform HARQ retransmission on an unlicensed carrier, so that the terminal can attempt to access a channel multiple times within the time window. On one hand, the probability of successful retransmission during uplink data transmission is improved; on the other hand, the network equipment is not required to send the scheduling information to the terminal for multiple times, and the load of the communication network can be reduced.

The Processing module 702 may be a Processor or a controller, such as a Central Processing Unit (CPU), a general-purpose Processor, a Digital Signal Processor (DSP), an Application-Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable logic device, a transistor logic device, a hardware component, or any combination thereof. Which may implement or perform the various illustrative logical blocks, modules, and circuits described in connection with the disclosure. The processor may also be a combination of computing functions, e.g., comprising one or more microprocessors, DSPs, and microprocessors, among others. The communication module 703 may be a communication interface, a transceiver circuit, etc., wherein the communication interface is generally referred to and may include one or more interfaces. The storage module 701 may be a memory.

When the processing module 702 is a processor, the communication module 703 is a communication interface, and the storage module 701 is a memory, the network device according to the embodiment of the present invention may be the network device shown in fig. 8.

Referring to fig. 8, the network device 800 includes: a processor 802, a communication interface 803, and a memory 801. The communication interface 803, the processor 802, and the memory 801 may be connected to each other via a communication connection.

In the embodiment of the present invention, it is,

the memory 801 is used for storing program instructions;

the processor 802 is configured to perform the following operations according to program instructions stored in the memory 801:

sending indication information to a terminal through the communication interface 803, where the indication information includes time window information for indicating the terminal to perform hybrid automatic repeat request, HARQ, retransmission on an unlicensed carrier, and the terminal allows multiple attempts to access a channel within the time window.

In one example, the processor 802 performs the operation of sending the indication information to the terminal through the communication interface 803, including:

the indication information is transmitted to the terminal through the communication interface 803 through radio resource control signaling or broadcast information.

the indication information is sent to the terminal through the communication interface 803 via downlink control information in a physical downlink control channel.

In one example, before the processor 802 performs the operation of sending the indication information to the terminal through the downlink control information in the physical downlink control channel through the communication interface 803, the processor 802 is further configured to perform the following operations according to the program instructions stored in the memory 801:

and scrambling the downlink control information by using a wireless network temporary identifier corresponding to the automatic uplink transmission.

In the embodiment of the present invention, the processor 802 sends, to the terminal through the communication interface 803, time window information for instructing the terminal to perform HARQ retransmission on an unlicensed carrier, so that the terminal can attempt to access a channel multiple times within the time window. On one hand, the probability of successful retransmission during uplink data transmission is improved; on the other hand, the network equipment is not required to send the scheduling information to the terminal for multiple times, and the load of the communication network can be reduced.

Fig. 9 is a schematic diagram of a communication device according to an embodiment of the present application, and as shown in fig. 9, the communication device 900 may be a chip, where the chip includes a processing unit and a communication unit. The processing unit may be a processor 910, which may be of the various types described previously. The communication unit may be, for example, an input/output interface 920, a pin or a circuit, etc., which may include or be connected to a system bus. Optionally, the communication device further includes a storage unit, which may be a memory 930 inside the chip, such as a register, a cache, a Random Access Memory (RAM), an EEPROM, or a FLASH; the memory unit may also be a memory located outside the chip, which may be of the various types described hereinbefore. A processor is coupled to the memory, and the processor can execute the instructions stored in the memory to cause the communication device to perform the functions of the network device in the methods described above in fig. 2-6.

In the case of integrated modules, fig. 10 shows a possible structural diagram of the terminal involved in the above-described embodiment. Terminal 1000 can include: a processing module 1002 and a communication module 1003. Processing module 1002 is configured to control and manage actions of the terminal, e.g., processing module 1002 is configured to enable the terminal to perform the processes of fig. 2-6, and/or other processes for the techniques described herein. The communication module 1003 is used for supporting communication between the terminal and other network entities, for example, communication between network devices. The terminal may further comprise a storage module 1001 for storing program codes and data of the terminal.

A communication module 1003, configured to receive indication information from a network device, where the indication information includes time window information used for indicating the terminal to perform HARQ retransmission on an unlicensed carrier;

a processing module 1002, configured to try to access the channel again when the attempt to access the channel fails within the time window.

In an example, the communication module 1003 is specifically configured to receive the indication information from the network device through radio resource control signaling or broadcast information.

In an example, the communication module 1003 is specifically configured to receive the indication information from the network device through downlink control information in a physical downlink control channel.

In an example, the processing module 1002 is further configured to descramble the downlink control information by using a radio network temporary identifier corresponding to an automatic uplink transmission before the communication module 1003 receives the indication information from the network device through the downlink control information in a physical downlink control channel.

In this embodiment of the present invention, the communication module 1003 receives, from the network device, time window information for instructing the terminal to perform HARQ retransmission on an unauthorized carrier, and when the terminal fails to attempt to access a channel within the time window, the terminal attempts to access the channel again. On one hand, the probability of successful retransmission during uplink data transmission is improved; on the other hand, the terminal does not need to receive the scheduling information from the network equipment for multiple times, and the load of the communication network can be reduced.

The Processing module 1002 may be a Processor or a controller, such as a Central Processing Unit (CPU), a general-purpose Processor, a Digital Signal Processor (DSP), an Application-Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable logic device, a transistor logic device, a hardware component, or any combination thereof. Which may implement or perform the various illustrative logical blocks, modules, and circuits described in connection with the disclosure. The processor may also be a combination of computing functions, e.g., comprising one or more microprocessors, DSPs, and microprocessors, among others. The communication module 1003 may be a communication interface, a transceiver circuit, etc., wherein the communication interface is generally referred to and may include one or more interfaces. The storage module 1001 may be a memory.

When the processing module 1002 is a processor, the communication module 1003 is a communication interface, and the storage module 1001 is a memory, the terminal according to the embodiment of the present invention may be the terminal shown in fig. 11.

Referring to fig. 11, the terminal 1100 includes: a processor 1102, a communication interface 1103, and a memory 1101. The communication interface 1103, the processor 1102, and the memory 1101 may be connected to each other through a communication connection.

In the embodiment of the present invention, it is,

the memory 1101 for storing program instructions;

the processor 1102 is configured to perform the following operations according to program instructions stored in the memory 1101:

receiving indication information from a network device through the communication interface 1103, where the indication information includes time window information used for indicating that the terminal performs HARQ (hybrid automatic repeat request) retransmission on an unlicensed carrier;

and when the attempt to access the channel fails within the time window, the access to the channel is attempted again.

In one example, the processor 1102 performs the operations of receiving indication information from a network device through the communication interface 1103, including:

the indication information is received from the network device through radio resource control signaling or broadcast information through the communication interface 1103.

the indication information is received from the network device through the communication interface 1103 through downlink control information in a physical downlink control channel.

In one example, before the processor 1102 performs the operation of receiving the indication information from the network device through the communication interface 1103 through the downlink control information in the physical downlink control channel, the processor 1102 is further configured to perform the following operations according to the program instructions stored in the memory 1101:

and descrambling the downlink control information by using the wireless network temporary identifier corresponding to the automatic uplink transmission.

Fig. 12 is a schematic diagram of a communication device according to an embodiment of the present disclosure, and as shown in fig. 12, the communication device 1200 may be a chip, where the chip includes a processing unit and a communication unit. The processing unit may be a processor 1210, which may be of the various types described previously. The communication unit may be, for example, an input/output interface 1220, a pin or a circuit, etc., which may include or be connected to a system bus. Optionally, the communication device further includes a storage unit, which may be a memory 1230 inside the chip, such as a register, a cache, a Random Access Memory (RAM), an EEPROM, or a FLASH; the memory unit may also be a memory located outside the chip, which may be of the various types described hereinbefore. A processor is coupled to the memory, and the processor can execute the instructions stored in the memory to cause the communication device to perform the functions of the terminal in the methods described above in fig. 2-6.

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

The above-mentioned embodiments, objects, technical solutions and advantages of the present invention are further described in detail, it should be understood that the above-mentioned embodiments are only exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made on the basis of the technical solutions of the present invention should be included in the scope of the present invention.

Claims

A method for hybrid automatic repeat request, the method comprising:

the network equipment sends indication information to a terminal, wherein the indication information comprises time window information used for indicating the terminal to conduct hybrid automatic repeat request (HARQ) retransmission on an unauthorized carrier, and the terminal allows multiple attempts to access a channel in the time window.
The method of claim 1, wherein the network device sends the indication information to the terminal, and wherein the sending comprises:

and the network equipment sends the indication information to the terminal through radio resource control signaling or broadcast information.
The method of claim 1, wherein the network device sends the indication information to the terminal, and wherein the sending comprises:

and the network equipment sends the indication information to the terminal through the downlink control information in the physical downlink control channel.
The method according to claim 3, wherein before the network device sends the indication information to the terminal through downlink control information in a physical downlink control channel, the method further comprises:

and the network equipment scrambles the downlink control information by using a wireless network temporary identifier corresponding to automatic uplink transmission.
A method for hybrid automatic repeat request, the method comprising:

a terminal receives indication information from network equipment, wherein the indication information comprises time window information used for indicating the terminal to perform hybrid automatic repeat request (HARQ) retransmission on an unauthorized carrier;

and when the terminal fails to attempt to access the channel within the time window, the terminal tries to access the channel again.
The method of claim 5, wherein the terminal receives indication information from a network device, comprising:

and the terminal receives the indication information from the network equipment through radio resource control signaling or broadcast information.
The method of claim 5, wherein the terminal receives indication information from a network device, comprising:

and the terminal receives the indication information from the network equipment through the downlink control information in the physical downlink control channel.
The method according to claim 7, wherein before the terminal receives the indication information from the network device through downlink control information in a physical downlink control channel, the method further comprises:

and the terminal descrambles the downlink control information by using the wireless network temporary identifier corresponding to the automatic uplink transmission.
A network device, characterized in that the network device comprises:

a communication module, configured to send indication information to a terminal, where the indication information includes time window information used to indicate the terminal to perform hybrid automatic repeat request, HARQ, retransmission on an unlicensed carrier, and the terminal allows multiple attempts to access a channel within the time window.
The network device according to claim 9, wherein the communication module is specifically configured to send the indication information to the terminal through radio resource control signaling or broadcast information.
The network device according to claim 9, wherein the communication module is specifically configured to send the indication information to the terminal through downlink control information in a physical downlink control channel.
The network device of claim 11, wherein the network device further comprises:

and the processing module is used for scrambling the downlink control information by using a wireless network temporary identifier corresponding to automatic uplink transmission before the communication module sends the indication information to the terminal through the downlink control information in the physical downlink control channel.
A terminal, characterized in that the terminal comprises:

a communication module, configured to receive indication information from a network device, where the indication information includes time window information used to indicate that the terminal performs HARQ (hybrid automatic repeat request) retransmission on an unlicensed carrier;

and the processing module is used for trying to access the channel again when the channel access is failed in the time window.
The terminal according to claim 13, wherein the communication module is specifically configured to receive the indication information from the network device through radio resource control signaling or broadcast information.
The terminal according to claim 13, wherein the communication module is specifically configured to receive the indication information from the network device through downlink control information in a physical downlink control channel.
The terminal of claim 15, wherein the processing module is further configured to descramble the downlink control information using a radio network temporary identifier corresponding to automatic uplink transmission before the communication module receives the indication information from the network device through the downlink control information in a physical downlink control channel.
A network device, characterized in that the network device comprises: a memory, a processor, and a communication interface;

the memory to store program instructions;

the processor is configured to perform the following operations according to program instructions stored in the memory:

and sending indication information to a terminal through the communication interface, wherein the indication information comprises time window information used for indicating the terminal to perform hybrid automatic repeat request (HARQ) retransmission on an unlicensed carrier, and the terminal allows multiple attempts to access a channel in the time window.
The network device of claim 17, wherein the processor performs the operation of sending the indication information to the terminal through the communication interface, and wherein the operation comprises:

and sending the indication information to the terminal through the communication interface through radio resource control signaling or broadcast information.
The network device of claim 17, wherein the processor performs the operation of sending the indication information to the terminal through the communication interface, and wherein the operation comprises:

and sending the indication information to the terminal through the communication interface through downlink control information in a physical downlink control channel.
The network device of claim 19, wherein before the processor performs the operation of sending the indication information to the terminal via downlink control information in a physical downlink control channel via the communication interface, the processor is further configured to perform the following operations according to program instructions stored in the memory:

and scrambling the downlink control information by using a wireless network temporary identifier corresponding to the automatic uplink transmission.
A terminal, characterized in that the terminal comprises: a memory, a processor, and a communication interface;

the memory to store program instructions;

the processor is configured to perform the following operations according to program instructions stored in the memory:

receiving indication information from a network device through the communication interface, wherein the indication information comprises time window information for indicating the terminal to perform hybrid automatic repeat request (HARQ) retransmission on an unlicensed carrier;

and when the attempt to access the channel fails within the time window, the access to the channel is attempted again.
The terminal of claim 21, wherein the processor performs the operation of receiving indication information from a network device via the communication interface, comprising:

receiving the indication information from the network device through radio resource control signaling or broadcast information over the communication interface.
The terminal of claim 21, wherein the processor performs the operation of receiving indication information from a network device via the communication interface, comprising:

receiving the indication information from the network device through downlink control information in a physical downlink control channel through the communication interface.
The terminal of claim 23, wherein prior to the processor performing the operation of receiving the indication information from the network device via downlink control information in a physical downlink control channel via the communication interface, the processor is further configured to perform the following operations according to program instructions stored in the memory:

and descrambling the downlink control information by using the wireless network temporary identifier corresponding to the automatic uplink transmission.
A communication apparatus, comprising a processor configured to enable the communication apparatus to perform the method according to any one of claims 1 to 8.
A computer-readable storage medium comprising instructions that, when executed on a computer, cause the computer to perform the method of any of claims 1 to 8.
A computer program product comprising instructions which, when run on a computer, cause the computer to perform the method of any one of claims 1 to 8.
Circuitry configured to perform the method of any one of claims 1 to 8.