CN112020840B

CN112020840B - Indication method and device for automatic retransmission, network equipment, UE and storage medium

Info

Publication number: CN112020840B
Application number: CN202080001717.1A
Authority: CN
Inventors: 朱亚军; 洪伟; 李俊丽; 李勇
Original assignee: Beijing University of Posts and Telecommunications; Beijing Xiaomi Mobile Software Co Ltd
Current assignee: Beijing University of Posts and Telecommunications; Beijing Xiaomi Mobile Software Co Ltd
Priority date: 2020-07-29
Filing date: 2020-07-29
Publication date: 2023-10-10
Anticipated expiration: 2040-07-29
Also published as: CN112020840A; WO2022021162A1

Abstract

The disclosure relates to an indication method and device for automatic retransmission, network equipment, UE and storage medium. The automatic retransmission indication method comprises the following steps: and receiving first information, demodulating a first PDSCH scheduled by the first information based on the first information, determining a demodulation result of the first PDSCH and/or a second PDSCH demodulation result sharing the same LBT sub-band with the first PDSCH in the same time domain unit, and sending PDSCH demodulation result indication information to the network equipment according to the first information. The method solves the problem that the codebook can not be synthesized under the wideband carrier operation by utilizing the traditional semi-static codebook, reduces the control signaling overhead to a certain extent, and improves the frequency spectrum efficiency and the reliability of unlicensed frequency band data transmission.

Description

Indication method and device for automatic retransmission, network equipment, UE and storage medium

Technical Field

The present disclosure relates to an automatic retransmission indication technology, and in particular, to an automatic retransmission indication method and apparatus, a network device, a UE, and a storage medium.

Background

Since wideband carrier technology is introduced in NR-U and allows the base station to flexibly schedule Part or all of the resources of the active partial Bandwidth (BWP) for physical downlink shared channel (PDSCH, physical Downlink Shared Channel) transmission, it may happen that a PDSCH shares the same listen before talk (Listen Before Talk, LBT) subband with another PDSCH in the same time domain unit, resulting in failure to use conventional semi-static codebook synthesis rules to indicate PDSCH demodulation results.

Disclosure of Invention

In view of this, the embodiments of the present disclosure provide an indication method and apparatus for automatic retransmission, a network device, a UE, and a storage medium.

According to a first aspect of embodiments of the present disclosure, there is provided an indication method of automatic retransmission, for a network device, the method including:

transmitting first information; the first information is used to indicate whether the scheduled PDSCH shares the same LBT subband within the same time domain unit.

In one embodiment, the first information includes a first indicator, where the first indicator is used to indicate whether the PDSCH shares the same LBT subband in the same time domain unit.

In one embodiment, the first indicator is a first value indicating that the PDSCH of the first information schedule and the PDSCH of the second information schedule share the same LBT subband in the same time domain unit; or alternatively

The first indicator is a second value, and indicates that the PDSCH scheduled by the first information and the PDSCH scheduled by the second information do not share the same LBT subband in the same time domain unit.

In one embodiment, before the sending the first information, the method further includes:

scrambling the first information by a scrambling sequence; the scrambling sequence includes information whether the PDSCH shares the same LBT subband in the same time domain unit.

In one embodiment, the scrambling sequence indicates a third value indicating that the PDSCH scheduled by the first information and the PDSCH scheduled by the information of the second information share the same LBT subband in the same time domain unit; or alternatively

The scrambling sequence indicates a fourth value indicating that the PDSCH scheduled by the first information and the PDSCH scheduled by the second information do not share the same LBT subband in the same time domain unit.

In one embodiment, the method further comprises:

and receiving PDSCH demodulation result indication information, and determining a PDSCH with demodulation failure based on the first indicator or the scrambling sequence and the PDSCH demodulation result indication information when determining PDSCH sharing the same LBT sub-band in the same time domain unit.

According to a second aspect of embodiments of the present disclosure, there is provided an indication method of automatic retransmission, for a user equipment, the method comprising:

receiving first information, wherein the first information is used for indicating whether a first PDSCH shares the same LBT sub-band in the same time domain unit;

demodulating a first PDSCH scheduled by the first information based on the first information, and determining a demodulation result of the first PDSCH;

and transmitting PDSCH demodulation result indication information according to the first information.

In one embodiment, the transmitting PDSCH demodulation result indication information according to the first information includes:

and when a second PDSCH sharing the same LBT sub-band exists in the same time domain unit with the first PDSCH, sending indication information containing the demodulation results of the first PDSCH and the second PDSCH according to the demodulation results of the first PDSCH and the second PDSCH.

In one embodiment, the first information includes a first indicator, where the first indicator is used to indicate whether the first PDSCH shares the same LBT subband in the same time domain unit.

In one embodiment, the first indicator is a first value indicating that the first PDSCH and the second PDSCH share the same LBT subband within the same time domain unit; or alternatively

The first indicator is a second value indicating that the first PDSCH and the second PDSCH do not share the same LBT subband in the same time domain unit.

In one embodiment, the method further comprises:

and determining a frequency domain relation that the first PDSCH and the second PDSCH share the same LBT sub-band in the same time domain unit according to the first value.

In one embodiment, the first information further has a scrambling sequence; the scrambling sequence is used for scrambling the first information; the scrambling sequence includes information whether the first PDSCH shares the same LBT subband in the same time domain unit.

In one embodiment, the scrambling sequence indicates a third value indicating that the first PDSCH and the second PDSCH share the same LBT subband within the same time domain unit; or alternatively

The scrambling sequence indicates a fourth value indicating that the first PDSCH and the second PDSCH do not share the same LBT subband within the same time domain unit.

In one embodiment, the method further comprises:

and descrambling the first information through the scrambling sequence containing the third value or the fourth value, determining that the third value or the fourth value is contained in the second information after the descrambling is successful, and determining that the first PDSCH and the second PDSCH share the frequency domain relation of the same LBT sub-band in the same time domain unit according to the third value or the fourth value.

According to a third aspect of embodiments of the present disclosure, there is provided an indication apparatus for automatic retransmission, for a network device, the apparatus comprising:

a transmission unit configured to transmit first information; the first information is used for indicating whether the scheduled physical downlink shared channel PDSCH shares the same listen before talk LBT subband in the same time domain unit.

In one embodiment, the apparatus further comprises:

a scrambling unit configured to scramble the first information by a scrambling sequence; the scrambling sequence includes information whether the PDSCH shares the same LBT subband in the same time domain unit.

In one embodiment, the apparatus further comprises:

a receiving unit configured to receive PDSCH demodulation result indication information;

And a determining unit configured to determine a PDSCH that fails demodulation based on the first indicator or the scrambling sequence and the PDSCH demodulation result indication information when determining PDSCH sharing the same LBT subband in the same time domain unit.

According to a fourth aspect of embodiments of the present disclosure, there is provided an indication apparatus for automatic retransmission, for a user equipment, the apparatus comprising:

a receiving unit configured to receive first information; the first information is used for indicating whether the first PDSCH shares the same LBT subband in the same time domain unit;

a demodulation unit configured to demodulate a first PDSCH scheduled by the first information based on the first information;

a first determining unit configured to determine a demodulation result of the first PDSCH;

and a transmitting unit configured to transmit PDSCH demodulation result indication information according to the first information.

In one embodiment, the first determining unit is further configured to trigger the transmitting unit to transmit the indication information including the demodulation results of the first PDSCH and the second PDSCH according to the demodulation results of the first PDSCH and the second PDSCH when it is determined that the second PDSCH sharing the same LBT subband exists in the same time domain unit as the first PDSCH.

In one embodiment, the apparatus further comprises:

and a second determining unit configured to determine, according to the first value, a frequency domain relationship in which the first PDSCH and the second PDSCH share the same LBT subband in the same time domain unit.

In one embodiment, the apparatus further comprises:

and the descrambling unit is configured to descramble the first information through the scrambling sequence containing the third value or the fourth value, determine that the second information contains the third value or the fourth value after the descrambling is successful, and determine the frequency domain relation that the first PDSCH and the second PDSCH share the same LBT sub-band in the same time domain unit according to the third value or the fourth value.

According to a fifth aspect of the disclosed embodiments, there is provided a network device comprising a processor, a transceiver, a memory and an executable program stored on the memory and capable of being executed by the processor, the processor executing the steps of the method of indicating automatic retransmission of the first aspect of the disclosed embodiments when the executable program is executed.

According to a sixth aspect of the disclosed embodiments, there is provided a user equipment comprising a processor, a transceiver, a memory and an executable program stored on the memory and capable of being executed by the processor, the processor executing the steps of the method of indicating automatic retransmission of the second aspect of the disclosed embodiments when the executable program is executed.

According to a seventh aspect of the embodiments of the present disclosure, there is provided a storage medium having stored thereon an executable program which when executed by a processor implements the steps of the method of indicating automatic retransmission.

According to the method and the device for indicating automatic retransmission, the network equipment, the UE and the storage medium, when the PDSCH of the same LBT sub-band is shared in the same time domain unit, if the PDSCH fails to be demodulated, an indication codebook is required to be sent to the network equipment according to a specific demodulation result, and when the indication codebook is required to be indicated to be clear of which PDSCH fails to be demodulated, the network equipment is convenient to retransmit the PDSCH which fails to be demodulated to the UE based on the indication codebook. According to the embodiment of the disclosure, through redesigning the downlink control information (Downlink Control Information, DCI), the HARQ feedback content corresponding to each hybrid automatic repeat request (Hybrid Automatic Repeat reQuest, HARQ) process of each sub-band in the semi-static codebook is ensured to be accurately judged, the problem that the codebook can not be synthesized under the broadband carrier operation by utilizing the traditional semi-static codebook is solved, the control signaling overhead is reduced to a certain extent, and the frequency spectrum efficiency and the reliability of unlicensed frequency band data transmission are improved.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the embodiments of the invention.

Fig. 1 is a schematic diagram of a wireless communication system according to an exemplary embodiment;

FIG. 2 is a flow diagram illustrating a method of indication of automatic retransmission according to an example embodiment;

FIG. 3 is a flow diagram illustrating a method of indication of automatic retransmission according to an example embodiment;

fig. 4 is a schematic diagram showing the composition structure of an automatic retransmission indicating device according to an exemplary embodiment;

fig. 5 is a schematic diagram showing the composition structure of an automatic retransmission indicating device according to an exemplary embodiment;

fig. 6 is a schematic diagram showing a composition structure of a user equipment according to an exemplary embodiment.

Detailed Description

Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with embodiments of the invention. Rather, they are merely examples of apparatus and methods consistent with aspects of embodiments of the invention as detailed in the accompanying claims.

The terminology used in the embodiments of the disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of the embodiments of the disclosure. As used in this disclosure and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any or all possible combinations of one or more of the associated listed items.

It should be understood that although the terms first, second, third, etc. may be used in embodiments of the present disclosure to describe various information, these information should not be limited to these terms. These terms are only used to distinguish one type of information from another. For example, the first information may also be referred to as second information, and similarly, the second information may also be referred to as first information, without departing from the scope of embodiments of the present disclosure. The word "if" as used herein may be interpreted as "at … …" or "at … …" or "responsive to a determination", depending on the context.

Referring to fig. 1, a schematic structural diagram of a wireless communication system according to an embodiment of the disclosure is shown. As shown in fig. 1, the wireless communication system is a communication system based on a cellular mobile communication technology, and may include: a number of terminals 11 and a number of base stations 12.

Where the terminal 11 may be a device providing voice and/or data connectivity to a user. The terminal 11 may communicate with one or more core networks via a radio access network (Radio Access Network, RAN), and the terminal 11 may be an internet of things terminal such as a sensor device, a mobile phone (or "cellular" phone) and a computer with an internet of things terminal, for example, a stationary, portable, pocket, hand-held, computer-built-in or vehicle-mounted device. Such as a Station (STA), subscriber unit (subscriber unit), subscriber Station (subscriber Station), mobile Station (mobile), remote Station (remote Station), access point, remote terminal (remote terminal), access terminal (access terminal), user equipment (user terminal), user agent (user agent), user device (user equipment), or User Equipment (UE). Alternatively, the terminal 11 may be an unmanned aerial vehicle device. Alternatively, the terminal 11 may be a vehicle-mounted device, for example, a car-driving computer having a wireless communication function, or a wireless communication device externally connected to the car-driving computer. Alternatively, the terminal 11 may be a roadside device, for example, a street lamp, a signal lamp, or other roadside devices having a wireless communication function.

The base station 12 may be a network-side device in a wireless communication system. Wherein the wireless communication system may be a fourth generation mobile communication technology (the 4th generation mobile communication,4G) system, also known as a long term evolution (Long Term Evolution, LTE) system; alternatively, the wireless communication system may be a 5G system, also known as a New Radio (NR) system or a 5G NR system. Alternatively, the wireless communication system may be a next generation system of the 5G system. Among them, the access network in the 5G system may be called NG-RAN (New Generation-Radio Access Network, new Generation radio access network). Or, an MTC system.

Wherein the base station 12 may be an evolved base station (eNB) employed in a 4G system. Alternatively, the base station 12 may be a base station (gNB) in a 5G system employing a centralized and distributed architecture. When the base station 12 adopts a centralized and Distributed architecture, it typically includes a Centralized Unit (CU) and at least two Distributed Units (DUs). A protocol stack of a packet data convergence protocol (Packet Data Convergence Protocol, PDCP) layer, a radio link layer control protocol (Radio Link Control, RLC) layer, and a medium access control (Media Access Control, MAC) layer is provided in the centralized unit; a Physical (PHY) layer protocol stack is provided in the distribution unit, and the specific implementation of the base station 12 is not limited by the embodiment of the present disclosure.

A wireless connection may be established between the base station 12 and the terminal 11 over a wireless air interface. In various embodiments, the wireless air interface is a fourth generation mobile communication network technology (4G) standard-based wireless air interface; or, the wireless air interface is a wireless air interface based on a fifth generation mobile communication network technology (5G) standard, for example, the wireless air interface is a new air interface; alternatively, the wireless air interface may be a wireless air interface based on a 5G-based technology standard of a next generation mobile communication network.

In some embodiments, an E2E (End-to-End) connection may also be established between terminals 11. Such as V2V (vehicle to vehicle, vehicle-to-vehicle) communications, V2I (vehicle to Infrastructure, vehicle-to-road side equipment) communications, and V2P (vehicle to Pedestrian, vehicle-to-person) communications among internet of vehicles communications (vehicle to everything, V2X).

In some embodiments, the above wireless communication system may further comprise a network management device 13.

Several base stations 12 are connected to a network management device 13, respectively. The network management device 13 may be a core network device in a wireless communication system, for example, the network management device 13 may be a mobility management entity (Mobility Management Entity, MME) in an evolved packet core network (Evolved Packet Core, EPC). Alternatively, the network management device may be other core network devices, such as a Serving GateWay (SGW), a public data network GateWay (Public Data Network GateWay, PGW), a policy and charging rules function (Policy and Charging Rules Function, PCRF) or a home subscriber server (Home Subscriber Server, HSS), etc. The embodiment of the present disclosure is not limited to the implementation form of the network management device 13.

Execution bodies to which embodiments of the present disclosure relate include, but are not limited to: a User Equipment (UE) in a cellular mobile communication system, a base station for cellular mobile communication, and the like.

Fig. 2 is a flow chart illustrating an automatic retransmission indication method according to an exemplary embodiment, and as shown in fig. 2, the automatic retransmission indication method according to an embodiment of the disclosure includes the following processing steps:

in step 201, the network device sends first information to the user device. The first information is used to indicate whether the scheduled PDSCH shares the same LBT subband within the same time domain unit.

In an embodiment of the present disclosure, the first information includes a first indicator, where the first indicator is used to indicate whether the PDSCH shares the same LBT subband in the same time domain unit. When the first indicator is a first value, indicating that the PDSCH scheduled by the first information and the PDSCH scheduled by the second information share the same LBT subband in the same time domain unit; and when the first indicator is a second value, indicating that the PDSCH scheduled by the first information and the PDSCH scheduled by the second information do not share the same LBT sub-band in the same time domain unit.

As one example, the first information may be DCI. A 1-bit character is added in DCI as an indication character to indicate whether the PDSCH scheduled by a plurality of DCIs have time overlapping and share the same LBT sub-band, and when the bit is 1, the situation that the PDSCH scheduled by the current DCI has time overlapping with the PDSCH scheduled by another DCI and shares the same LBT sub-band is indicated; when the bit is 0, it means that the PDSCH of the current DCI schedule and the PDSCH of another schedule do not share the same LBT subband in the same time domain unit. Alternatively, when the bit is 0, it may be that the PDSCH scheduled by the current DCI overlaps with the PDSCH scheduled by another DCI in time and shares the same LBT subband; when the bit is 1, it means that the PDSCH of the current DCI schedule and the PDSCH of another schedule do not share the same LBT subband in the same time domain unit.

In the case of not considering the frequency band resource, a two-bit indicator may be added to the DCI to indicate whether the PDSCH shares the same LBT subband in the same time domain unit, for example, when two indicator bits in the DCI are "00", which indicates that the PDSCH scheduled by the current DCI does not share the same LBT subband with other PDSCH in the same time domain unit. When two indicator bits in DCI are "01", it means that the PDSCH scheduled by the current DCI and the PDSCH scheduled by the previous DCI do not share the same LBT sub-band in the same time domain unit, and when two indicator bits in DCI are "10", it means that the PDSCH scheduled by the current DCI and the PDSCH scheduled by the next DCI do not share the same LBT sub-band in the same time domain unit. That is, when the indicator contains more bits, it may not only indicate that multiple PDSCH share the same LBT subband in the same time domain unit, but also further indicate which PDSCH scheduled by the current DCI shares the same LBT subband in the same time domain unit.

In the embodiment of the present disclosure, the first information may also be a scrambling sequence of DCI, where whether the scheduled PDSCH shares the same LBT subband in the same time domain unit is indicated by the scrambling sequence of DCI. Specifically, before the network device sends first information to the user device, scrambling the first information by using a scrambling sequence; the scrambling sequence includes information whether the PDSCH shares the same LBT subband in the same time domain unit. In one embodiment, when the scrambling sequence indicates a third value, the PDSCH indicating the first information schedule and the PDSCH of the information schedule of the second information share the same LBT subband in the same time domain unit; and when the scrambling sequence indicates a fourth value, indicating that the PDSCH scheduled by the first information and the PDSCH scheduled by the second information do not share the same LBT sub-band in the same time domain unit.

As an example, when multiple PDSCH scheduled by multiple DCI do not share the same LBT subband in the same time domain unit, the DCI is scrambled with a first scrambling sequence, and when multiple PDSCH scheduled by multiple DCI share the same LBT subband in the same time domain unit, the DCI is scrambled with the first scrambling sequence; if the first scrambling sequence is a Cell radio network temporary identity (Cell-Radio Network Temporary Identifier, C-RNTI); the second scrambling sequence may be an implicit indication bit set to 2 bits in the C-RNTI, for example, 01 is used as the last two bits of cyclic redundancy check (Cyclic Redundancy Check, CRC) bits of the second scrambling sequence, and the information of the CRC bits of the first scrambling sequence and the second scrambling sequence informs the UE in advance, if the UE uses the second scrambling sequence to descramble the DCI correctly, it indicates that the PDSCH scheduled by the current DCI and the PDSCH scheduled by another DCI share the information of the same LBT subband in the same time domain unit. If the first scrambling sequence is adopted to descramble the DCI correctly, the PDSCH scheduled by the DCI does not share the same LBT sub-band in the same time domain unit. Of course, the CRC indicator character set in the second scrambling sequence may be "10", "00", or "11", or the like.

When the embodiment of the disclosure implicitly indicates, through the scrambling sequence, whether the PDSCH scheduled by the DCI shares the information of the same LBT subband in the same time domain unit, the PDSCH scheduled by the DCI may also be further indicated by an indication character set in the scrambling sequence, in particular, with which PDSCH shares the same LBT subband in the same time domain unit. If the CRC indication character set in the second scrambling sequence is 01 as the last two bits CRC of the second scrambling sequence, the PDSCH scheduled by the current DCI and the PDSCH scheduled by the last DCI share the same LBT sub-band in the same time domain unit; when 10 is used as the last two-bit CRC of the second scrambling sequence, it means that the PDSCH of the current DCI schedule and the PDSCH of the next DCI schedule share the same LBT subband in the same time domain unit.

In an embodiment of the disclosure, the method further comprises: and the network equipment receives PDSCH demodulation result indication information sent by the user equipment, and determines a PDSCH with failed demodulation and retransmits based on the first indicator or the scrambling sequence and the PDSCH demodulation result indication information when determining that the PDSCH with the same LBT sub-band is shared in the same time domain unit.

Fig. 3 is a flow chart illustrating an automatic retransmission indication method according to an exemplary embodiment, and as shown in fig. 3, the automatic retransmission indication method according to an embodiment of the disclosure includes the following steps:

In step 301, the user equipment receives first information sent by the network equipment.

The first information is used to indicate whether the first PDSCH shares the same LBT subband within the same time domain unit.

Specifically, in the embodiment of the present disclosure, the first information includes a first indicator, where the first indicator is used to indicate whether the PDSCH shares the same LBT subband in the same time domain unit. When the first indicator is a first value, indicating that the PDSCH scheduled by the first information and the PDSCH scheduled by the second information share the same LBT subband in the same time domain unit; and when the first indicator is a second value, indicating that the PDSCH scheduled by the first information and the PDSCH scheduled by the second information do not share the same LBT sub-band in the same time domain unit. As one example, the first information may be DCI. A 1-bit character is added in DCI as an indication character to indicate whether the PDSCH scheduled by a plurality of DCIs have time overlapping and share the same LBT sub-band, and when the bit is 1, the situation that the PDSCH scheduled by the current DCI has time overlapping with the PDSCH scheduled by another DCI and shares the same LBT sub-band is indicated; when the bit is 0, it means that the PDSCH of the current DCI schedule and the PDSCH of another schedule do not share the same LBT subband in the same time domain unit. Alternatively, when the bit is 0, it may be that the PDSCH scheduled by the current DCI overlaps with the PDSCH scheduled by another DCI in time and shares the same LBT subband; when the bit is 1, it means that the PDSCH of the current DCI schedule and the PDSCH of another schedule do not share the same LBT subband in the same time domain unit. In the case of not considering the frequency band resource, a two-bit indicator may be added to the DCI to indicate whether the PDSCH shares the same LBT subband in the same time domain unit, for example, when two indicator bits in the DCI are "00", which indicates that the PDSCH scheduled by the current DCI does not share the same LBT subband with other PDSCH in the same time domain unit. When two indicator bits in DCI are "01", it means that the PDSCH scheduled by the current DCI and the PDSCH scheduled by the previous DCI do not share the same LBT sub-band in the same time domain unit, and when two indicator bits in DCI are "10", it means that the PDSCH scheduled by the current DCI and the PDSCH scheduled by the next DCI do not share the same LBT sub-band in the same time domain unit. That is, when the indicator contains more bits, it may not only indicate that multiple PDSCH share the same LBT subband in the same time domain unit, but also further indicate which PDSCH scheduled by the current DCI shares the same LBT subband in the same time domain unit.

In the embodiment of the present disclosure, the first information may also be a scrambling sequence of DCI, which indicates whether the scheduled PDSCH shares the same LBT subband in the same time domain unit. Specifically, before the network device sends first information to the user device, scrambling the first information by using a scrambling sequence; the scrambling sequence includes information whether the PDSCH shares the same LBT subband in the same time domain unit. In one embodiment, when the scrambling sequence indicates a third value, the PDSCH indicating the first information schedule and the PDSCH of the information schedule of the second information share the same LBT subband in the same time domain unit; and when the scrambling sequence indicates a fourth value, indicating that the PDSCH scheduled by the first information and the PDSCH scheduled by the second information do not share the same LBT sub-band in the same time domain unit. As an example, when multiple PDSCH scheduled by multiple DCI do not share the same LBT subband in the same time domain unit, the DCI is scrambled with a first scrambling sequence, and when multiple PDSCH scheduled by multiple DCI share the same LBT subband in the same time domain unit, the DCI is scrambled with the first scrambling sequence; if the first scrambling sequence is C-RNTI; the second scrambling sequence may be an implicit indication bit set to 2 bits in the C-RNTI, for example, 01 is used as the last two bits of cyclic redundancy check (Cyclic Redundancy Check, CRC) bits of the second scrambling sequence, and the first scrambling sequence and the second scrambling sequence are notified to the UE in advance, if the UE uses the second scrambling sequence to descramble the DCI correctly, it indicates that the PDSCH scheduled by the current DCI shares information of the same LBT subband with the PDSCH scheduled by another DCI in the same time domain unit. If the first scrambling sequence is adopted to descramble the DCI correctly, the PDSCH scheduled by the DCI does not share the same LBT sub-band in the same time domain unit. Of course, the CRC indicator character set in the second scrambling sequence may be "10", "00", or "11", or the like.

When the embodiment of the disclosure implicitly indicates, through the scrambling sequence, whether the PDSCH scheduled by the DCI shares the information of the same LBT subband in the same time domain unit, the PDSCH scheduled by the DCI may also be further indicated by an indication character set in the scrambling sequence, in particular, with which PDSCH shares the same LBT subband in the same time domain unit. As indicated by setting a CRC in the second scrambling sequence, when 01 is employed as the last two-bit CRC of the second scrambling sequence, it means that the PDSCH of the current DCI schedule shares the same LBT subband in the same time domain unit as the PDSCH of the previous DCI schedule; when 10 is used as the last two-bit CRC of the second scrambling sequence, it means that the PDSCH of the current DCI schedule and the PDSCH of the next DCI schedule share the same LBT subband in the same time domain unit.

Step 302, demodulating a first PDSCH scheduled by the first information based on the first information, and determining a demodulation result of the first PDSCH.

The user equipment demodulates PDSCH based on DCI, determines whether the current PDSCH shares the same LBT subband with other PDSCH in the same time domain unit based on DCI itself or scrambling sequence of DCI. When determining that the PDSCH demodulation sharing the same LBT subband in the same time domain unit as other PDSCH fails, it is necessary to clearly indicate to the network device which PDSCH demodulation is successful and which PDSCH demodulation fails, so that the network device can initiate retransmission of PDSCH that fails in demodulation based on PDSCH demodulation result indication information.

In the embodiment of the disclosure, for PDSCH sharing the same LBT subband in the same time domain unit, since multiple PDSCH occupy common LBT subband resources, the indication codebook may be indicated in unclear condition, and by notifying the user equipment that multiple PDSCH occupy common LBT subband resources, the user equipment may feed back an accurate indication codebook to the network equipment based on a specific demodulation result, so that the network equipment is convenient to retransmit PDSCH based on the indication codebook.

And step 303, transmitting PDSCH demodulation result indication information to the network device according to the first information.

In the embodiment of the present disclosure, a second PDSCH sharing the same LBT subband may not exist in the same time domain unit as the first PDSCH, and at this time, the indication may be directly performed according to an existing codebook indication manner. And when a second PDSCH sharing the same LBT sub-band exists in the same time domain unit with the first PDSCH, sending indication information containing the demodulation results of the first PDSCH and the second PDSCH according to the demodulation results of the first PDSCH and the second PDSCH. And if the demodulation result of the second PDSCH sharing the same LBT sub-band exists in the same time domain unit with the first PDSCH, indicating corresponding demodulation result indication information to network equipment according to the specific demodulation result.

And the user equipment determines the frequency domain relation that the first PDSCH and the second PDSCH share the same LBT sub-band in the same time domain unit according to the specific value of the DCI. Specifically, when the value of the corresponding indicator bit in DCI corresponding to multiple PDSCH is "1", the multiple PDSCH share the same LBT subband in the same time domain unit. That is, when the DCI takes the first value, multiple PDSCH are indicated to share the same LBT subband in the same time domain unit.

And the user equipment utilizes the scrambling sequence containing the third value or the fourth value to descramble the first information, determines that the second information contains the third value or the fourth value after the descrambling is successful, and determines the frequency domain relation that the PDSCH and other PDSCH share the same LBT sub-band in the same time domain unit according to the third value or the fourth value.

The following further clarifies the essence of the technical solution of the embodiments of the present disclosure by means of specific examples.

TABLE 1

As shown in table 1, the bearing relationship of PDSCH in different frequency bands SB is shown, and the last row in table 1 represents the indication information of the semi-static codebook fed back by the UE to the network device. In Case1, PDSCH1 is carried on the LBT subband of SB0, and the semi-static codebook is the PDSCH demodulation result indicating four LBT subbands of SB0-SB 3. Since only the LBT subband of SB0 carries PDSCH1, the codebook is "0000" or "1000", where "1000" is successful in demodulation for PDSCH1 and "0000" indicates failure in demodulation for PDSCH 1. The cases in Case2 and Case3 are similar to Case1, except that LBT subband resources occupied by PDSCH are different, and the occupied resources of scheduling information DCI for PDSCH are also different. In the embodiments of the present disclosure, mainly focusing on PDSCH that have time overlapping and share the same subband, as in Case of Case4 in table 1, when UE receives PDCCH 5 on SB0 and correctly decodes its PDSCH5 scheduled on SB0 and SB2, but because of strong interference, UE does not receive PDCCH 6 on SB1 and its PDSCH6 scheduled for transmission on SB1 and SB2, UE will consider that only PDCCH 5 and its corresponding PDSCH5 are transmitted in this Case, since UE side correctly decodes PDSCH5, report 1100 to network device side, and network device side will consider that PDSCH5 and PDSCH6 scheduled by PDCCH 5 and PDCCH 6 are both correctly received by UE when receiving 1100, and therefore PDSCH6 will not be retransmitted. In this case, data loss of the PDSCH6 may be caused, which may lead to degradation of reliability of the communication system. The embodiment of the disclosure is just for the situation that a plurality of PDSCH share the same LBT subband in the same time domain unit, by indicating DCI or DCI scrambling sequence to UE, two PDSCH share the same LBT subband in the same time domain unit, and the PDSCH demodulation situation needs to be reported for this situation. Specifically, two types of scrambling manners are adopted for DCI to distinguish the situation that multiple PDSCH share the same LBT subband in the same time domain unit. On the network device side, since the network device knows that the network device has time overlap with the PDSCH6 to be scheduled by the DCI6 and shares the same LBT sub-band (SB 1) when the DCI5 is scheduled, the network device scrambles the DCI5 by using an extended scrambling sequence (C-rnti+10), which indicates that the PDSCH scheduled by the current DCI and the PDSCH6 scheduled by the next DCI6 share the LBT sub-band in a time domain unit; when the extended scrambling sequence is C-RNTI+01, the situation that the PDSCH scheduled by the current DCI and the PDSCH scheduled by the last DCI share the LBT sub-band in a time domain unit is indicated. At the user equipment side, firstly, descrambling DCI5 by adopting C-RNTI, and because of the situation of descrambling error at the moment, descrambling is carried out by adopting an extended scrambling sequence, descrambling is carried out on the DCI5 again by utilizing C-RNTI+10 or C-RNTI+01, and after the user correctly descrambles by utilizing C-RNTI+10, the situation that the PDSCH scheduled by the DCI and the PDSCH scheduled by the next DCI have time overlapping and share the same LBT sub-band is known. Then for case4, for HARQ feedback on SB0 subband, its HARQ content is set according to the decoding situation of PDSCH5, for shared LBT subband (SB 1), comprehensively consider its decoding situation with another PDSCH6, in case of PDSCH6 loss, for HARQ feedback on SB1 (dashed box) subband, because PDSCH6 is lost, comprehensively consider the decoding result of PDSCH5 as ACK, the decoding result of PDSCH6 as NACK, i.e. the HARQ feedback content of case4 as 1000. Since the feedback content on the SB0 subband where the PDSCH5 is located is 1, it is considered that the PDSCH5 has been decoded correctly, so that 0 on SB1 indicates that the PDSCH5 on SB1 has been decoded correctly, and that the PDSCH6 has been decoded incorrectly, and the network device only retransmits the data corresponding to the PDSCH6.

TABLE 2

As shown in table 2, which is another example case, for PDSCH6 and PDSCH5 that have time overlapping and share the same LBT subband, on the network device side, since it is known that there is time overlapping and sharing the same LBT subband (SB 1) with PDSCH5 scheduled by DCI5 when DCI6 is scheduled, scrambling DCI6 with an extended scrambling sequence (C-rnti+01) indicates that PDSCH6 scheduled by current DCI6 has time overlapping and sharing with PDSCH5 scheduled by previous DCI 5; on the user equipment side, because the DCI5 is completely missed, the user equipment adopts the C-RNTI to descramble the DCI6, and because the situation of descrambling errors occurs at the moment, an extended scrambling sequence is adopted, such as the situation that the C-RNTI+01 is firstly tried to act on the last two bits of CRC to descramble, and the PDSCH6 scheduled by the DCI6 is determined to have time overlapping with the PDSCH scheduled by the last DCI and share the same LBT sub-band after the UE correctly descrambles. For case4, for HARQ feedback on SB2 subband, its HARQ content is set according to the decoding situation of PDSCH6, for shared LBT subband (SB 1), comprehensively consider its decoding situation with another PDSCH5, in case of PDSCH5 loss, for HARQ feedback on SB1 (dashed box) subband, the decoding result of PDSCH6 is ACK, and the decoding result of PDSCH5 is NACK, and the HARQ feedback content of case4 is 0010, because PDSCH5 is lost. Since the feedback content on the SB2 subband where the PDSCH6 is located is 1, it is considered that the PDSCH6 has been decoded correctly, so that a 0 on SB1 indicates that the PDSCH6 on SB2 has been decoded correctly, and that the PDSCH5 has been decoded incorrectly, and the network device only retransmits the PDSCH5 corresponding data.

In the embodiment of the disclosure, when an extended indication character is directly set in DCI to indicate that a PDSCH scheduled by the DCI and other PDSCH share the same LBT subband in the same time domain unit, the value of an indication character corresponding to the indication bit is read after descrambling the DCI, whether the PDSCH scheduled by the DCI and the other PDSCH share the same LBT subband in the same time domain unit is determined according to the indication character, HARQ feedback is performed according to the decoding condition of the shared LBT subband and the PDSCH label failing to decode, and the example shown by the scrambling sequence is shown in the foregoing, so that network equipment accurately determines the PDSCH to be retransmitted. As an implementation manner, two indication bits may be set in the DCI, which indicates demodulation conditions of PDSCH sharing the same LBT subband in the same time domain unit in a manner as shown in the foregoing table 1 and table 2. Since the indication modes are identical, the description thereof will not be repeated here. When a bit indicator is set in the DCI to indicate that the PDSCH of the same LBT subband is shared in the same time domain unit, for example, when the DCI is extended DCI, the PDSCH scheduled by the current DCI is indicated to share the same LBT subband with other PDSCH in the same time domain unit, and if the DCI is non-extended DCI, the PDSCH scheduled by the DCI is indicated to not share the same LBT subband with other PDSCH in the same time domain unit. When the extension indication bit is "0", it indicates that the PDSCH scheduled by the current DCI overlaps with the PDSCH scheduled by the previous DCI in time and shares the same LBT subband, and when the extension indication bit is "1", it indicates that the PDSCH scheduled by the current DCI overlaps with the PDSCH scheduled by the next DCI in time and shares the same LBT subband.

Fig. 4 is a schematic diagram illustrating a composition structure of an automatic retransmission indicating device according to an exemplary embodiment, and as shown in fig. 4, the automatic retransmission indicating device according to an embodiment of the present disclosure includes:

a transmitting unit 40 configured to transmit the first information to the user equipment; the first information is used for indicating whether the scheduled physical downlink shared channel PDSCH shares the same listen before talk LBT subband in the same time domain unit.

In one embodiment, when the first indicator is a first value, the PDSCH of the first information schedule and the PDSCH of the second information schedule are indicated to share the same LBT subband in the same time domain unit;

and when the first indicator is a second value, indicating that the PDSCH scheduled by the first information and the PDSCH scheduled by the second information do not share the same LBT sub-band in the same time domain unit.

On the basis of the automatic retransmission indicating device shown in fig. 4, the automatic retransmission indicating device according to the embodiment of the present disclosure further includes:

a scrambling unit (not shown in fig. 4) configured to scramble the first information with a scrambling sequence; the scrambling sequence includes information whether the PDSCH shares the same LBT subband in the same time domain unit.

In one embodiment, when the scrambling sequence indicates a third value, the PDSCH indicating the first information schedule and the PDSCH of the information schedule of the second information share the same LBT subband in the same time domain unit;

and when the scrambling sequence indicates a fourth value, indicating that the PDSCH scheduled by the first information and the PDSCH scheduled by the second information do not share the same LBT sub-band in the same time domain unit.

a receiving unit (not shown in fig. 4) configured to receive PDSCH demodulation result indication information transmitted by the user equipment;

a determining unit (not shown in fig. 4) configured to determine a PDSCH with demodulation failure based on the first indicator or the scrambling sequence and the PDSCH demodulation result indication information when determining PDSCH sharing the same LBT subband in the same time domain unit, and notify the transmitting unit of retransmission of the PDSCH with demodulation failure.

The automatic retransmission indicating device is used for network equipment.

In an exemplary embodiment, the transmitting unit 40, the scrambling unit, the receiving unit, the determining unit, etc. may be implemented by one or more central processing units (CPU, central Processing Unit), graphics processors (GPU, graphics Processing Unit), baseband processors (BP, base processor), application specific integrated circuits (ASIC, application Specific Integrated Circuit), DSPs, programmable logic devices (PLD, programmable Logic Device), complex programmable logic devices (CPLD, complex Programmable Logic Device), field programmable gate arrays (FPGA, field-Programmable Gate Array), general purpose processors, controllers, microcontrollers (MCU, micro Controller Unit), microprocessors (Microprocessor), or other electronic components, and may also be implemented in combination with one or more Radio Frequency (RF) antennas for performing the indication method of automatic retransmission of the foregoing embodiments.

In the embodiments of the present disclosure, the specific manner in which the respective units of the automatic retransmission indication apparatus shown in fig. 4 perform operations has been described in detail in the embodiments related to the method, and will not be described in detail herein.

Fig. 5 is a schematic diagram illustrating a composition structure of an automatic retransmission indicating device according to an exemplary embodiment, and as shown in fig. 5, the automatic retransmission indicating device according to an embodiment of the present disclosure includes:

a receiving unit 50 configured to receive first information sent by a network device; the first information is used for indicating whether the first PDSCH shares the same LBT subband in the same time domain unit;

a demodulation unit 51 configured to demodulate a first PDSCH scheduled by the first information based on the first information;

a first determining unit 52 configured to determine a demodulation result of the first PDSCH;

and a transmitting unit 53 configured to transmit PDSCH demodulation result indication information to the network device according to the first information.

The first determining unit 52 is further configured to trigger the transmitting unit 53 to transmit indication information including demodulation results of the first PDSCH and the second PDSCH according to the demodulation results of the first PDSCH and the second PDSCH when determining that a second PDSCH sharing the same LBT subband exists in the same time domain unit as the first PDSCH.

In one embodiment, when the first indicator is a first value, the first PDSCH and the second PDSCH are indicated to share the same LBT subband within the same time domain unit;

and when the first indicator is a second value, indicating that the first PDSCH and the second PDSCH do not share the same LBT sub-band in the same time domain unit.

On the basis of the automatic retransmission indicating device shown in fig. 5, the automatic retransmission indicating device according to the embodiment of the present disclosure further includes:

a second determining unit (not shown in fig. 5) configured to determine, according to the first value, a frequency domain relationship in which the first PDSCH and the second PDSCH share the same LBT subband within the same time domain unit.

In one embodiment, when the scrambling sequence indicates a third value, the first PDSCH and the second PDSCH are indicated to share the same LBT subband in the same time domain unit;

And when the scrambling sequence indicates a fourth value, the scrambling sequence indicates that the first PDSCH and the second PDSCH do not share the same LBT sub-band in the same time domain unit.

a descrambling unit (not shown in fig. 5) configured to descramble the first information by using the scrambling sequence containing the third value or the fourth value, determine that the second information contains the third value or the fourth value after the descrambling is successful, and determine, according to the third value or the fourth value, that the first PDSCH and the second PDSCH share a frequency domain relationship of the same LBT subband in the same time domain unit.

The automatic retransmission indicating device of the embodiment of the disclosure is used in user equipment.

In an exemplary embodiment, the receiving unit 50, the demodulating unit 51, the first determining unit 52, the transmitting unit 53, the second determining unit, the descrambling unit, etc. may be implemented by one or more central processing units (CPU, central Processing Unit), graphic processors (GPU, graphics Processing Unit), baseband processors (BP, base processor), application specific integrated circuits (ASIC, application Specific Integrated Circuit), DSPs, programmable logic devices (PLD, programmable Logic Device), complex programmable logic devices (CPLD, complex Programmable Logic Device), field programmable gate arrays (FPGA, field-Programmable Gate Array), general purpose processors, controllers, microcontrollers (MCU, micro Controller Unit), microprocessors (Microprocessor), or other electronic components, and may also be implemented in combination with one or more Radio Frequency (RF) antennas for performing the indication method of automatic retransmission of the foregoing embodiments.

In the embodiments of the present disclosure, the specific manner in which the respective units of the automatic retransmission indication apparatus shown in fig. 5 perform operations has been described in detail in the embodiments related to the method, and will not be described in detail herein.

Fig. 6 is a block diagram of a terminal 6000 according to an exemplary embodiment. For example, the terminal 6000 can be a mobile phone, a computer, a digital broadcasting terminal, a messaging device, a game console, a tablet device, a medical device, an exercise device, a personal digital assistant or the like.

Referring to fig. 6, a terminal 6000 may include one or more of the following: a processing component 6002, a memory 6004, a power supply component 6006, a multimedia component 6008, an audio component 6010, an input/output (I/O) interface 6012, a sensor component 6014, and a communication component 6016.

The processing component 6002 generally controls overall operations of the terminal 6000, such as operations associated with display, telephone calls, data communications, camera operations and recording operations. The processing component 6002 may include one or more processors 6020 to execute instructions to perform all or part of the steps of the methods described above. Further, the processing component 6002 may include one or more modules to facilitate interaction between the processing component 6002 and other components. For example, the processing component 6002 may include a multimedia module to facilitate interaction between the multimedia component 6008 and the processing component 6002.

The memory 6004 is configured to store various types of data to support operations at the terminal 6000. Examples of such data include instructions for any application or method operating on the terminal 6000, contact data, phonebook data, messages, pictures, videos and the like. Memory 6004 may be implemented by any type of volatile or nonvolatile memory device or combination thereof, such as Static Random Access Memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic or optical disk.

The power supply assembly 6006 provides power to the various components of the terminal 6000. The power supply component 6006 can include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power for the terminal 6000.

The multimedia component 6008 comprises a screen between the terminal 6000 and the user providing an output interface. In some embodiments, the screen may include a Liquid Crystal Display (LCD) and a Touch Panel (TP). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive input signals from a user. The touch panel includes one or more touch sensors to sense touches, swipes, and gestures on the touch panel. The touch sensor may sense not only the boundary of a touch or sliding action, but also the duration and pressure associated with the touch or sliding operation. In some embodiments, the multimedia assembly 6008 includes a front camera and/or a rear camera. When the terminal 6000 is in an operation mode such as a photographing mode or a video mode, the front camera and/or the rear camera may receive external multimedia data. Each front camera and rear camera may be a fixed optical lens system or have focal length and optical zoom capabilities.

The audio component 6010 is configured to output and/or input audio signals. For example, the audio component 6010 includes a Microphone (MIC) configured to receive external audio signals when the terminal 6000 is in an operation mode such as a call mode, a recording mode and a voice recognition mode. The received audio signals may be further stored in the memory 6004 or transmitted via the communication component 6016. In some embodiments, audio component 6010 further comprises a speaker for outputting audio signals.

I/O interface 6012 provides an interface between processing component 6002 and peripheral interface modules, which may be keyboards, click wheels, buttons, etc. These buttons may include, but are not limited to: homepage button, volume button, start button, and lock button.

The sensor assembly 6014 includes one or more sensors for providing status assessment of various aspects to the terminal 6000. For example, the sensor assembly 6014 may detect an open/closed state of the terminal 6000, a relative positioning of the assemblies, such as a display and a keypad of the terminal 6000, the sensor assembly 6014 may also detect a change in position of the terminal 6000 or one of the assemblies of the terminal 6000, the presence or absence of a user's contact with the terminal 6000, an azimuth or acceleration/deceleration of the terminal 6000 and a temperature change of the terminal 6000. The sensor assembly 6014 may include a proximity sensor configured to detect the presence of nearby objects without any physical contact. The sensor assembly 6014 may also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor assembly 6014 may further include an acceleration sensor, a gyroscopic sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.

The communication component 6016 is configured to facilitate communication between the terminal 6000 and other devices in a wired or wireless manner. The terminal 6000 can access wireless networks based on communication standards such as Wi-Fi,2G or 3G or a combination thereof. In one exemplary embodiment, the communication component 6016 receives broadcast signals or broadcast-related information from an external broadcast management system via a broadcast channel. In one exemplary embodiment, the communication component 6016 further includes a Near Field Communication (NFC) module to facilitate short range communications. For example, the NFC module may be implemented based on Radio Frequency Identification (RFID) technology, infrared data association (IrDA) technology, ultra Wideband (UWB) technology, bluetooth (BT) technology, and other technologies.

In an exemplary embodiment, the terminal 6000 may be implemented by one or more Application Specific Integrated Circuits (ASICs), digital Signal Processors (DSPs), digital Signal Processing Devices (DSPDs), programmable Logic Devices (PLDs), field Programmable Gate Arrays (FPGAs), controllers, microcontrollers, microprocessors or other electronic elements for performing the above-described indication method of automatic retransmission.

In an exemplary embodiment, a non-transitory computer readable storage medium is also provided, such as a memory 6004 comprising instructions executable by the processor 6020 of the terminal 6000 to perform the above indicated method of automatic retransmission. For example, the non-transitory computer readable storage medium may be ROM, random Access Memory (RAM), CD-ROM, magnetic tape, floppy disk, optical data storage device, etc.

The disclosed embodiments also describe a network device comprising a processor, a transceiver, a memory, and an executable program stored on the memory and capable of being executed by the processor, the processor executing the steps of the method for indicating automatic retransmission of the previous embodiments when the executable program is executed.

The disclosed embodiments also describe a storage medium on which is stored an executable program that is executed by a processor to perform the steps of the automatic retransmission instruction method of the foregoing embodiments.

Other implementations of the examples of the application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. This application is intended to cover any adaptations, uses, or adaptations of embodiments of the application following, in general, the principles of the embodiments of the application and including such departures from the present disclosure as come within known or customary practice within the art to which the embodiments of the application pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the embodiments being indicated by the following claims.

It is to be understood that the embodiments of the application are not limited to the precise arrangements and instrumentalities shown in the drawings, which have been described above, and that various modifications and changes may be made without departing from the scope thereof. The scope of embodiments of the application is limited only by the appended claims.

Claims

1. An indication method of automatic retransmission, for a network device, wherein the method comprises:

scrambling the first information by a scrambling sequence; the scrambling sequence contains information whether the PDSCH shares the same LBT sub-band in the same time domain unit;

transmitting the first information; the first information is used for indicating whether the scheduled physical downlink shared channel PDSCH shares the same listen before talk LBT subband in the same time domain unit; the first information includes a first indicator, where the first indicator is used to indicate whether the PDSCH shares the same LBT subband in the same time domain unit;

receiving PDSCH demodulation result indication information;

and when determining the PDSCH sharing the same LBT sub-band in the same time domain unit, determining the PDSCH with demodulation failure based on the first indicator or the scrambling sequence and the PDSCH demodulation result indication information.

2. The method of claim 1, wherein the first indicator is a first value indicating that the first information scheduled PDSCH and the second information scheduled PDSCH share the same LBT subband within the same time domain unit; or alternatively

3. The method of claim 1, wherein the scrambling sequence indicates a third value indicating that the first information scheduled PDSCH and the second information scheduled PDSCH share a same LBT subband within a same time domain unit; or the scrambling sequence indicates a fourth value, which indicates that the PDSCH scheduled by the first information and the PDSCH scheduled by the second information do not share the same LBT subband in the same time domain unit.

4. An indication method of automatic retransmission, for a user equipment, wherein the method comprises:

and sending indication information of a demodulation result of the first PDSCH according to the first information.

5. The method of claim 4, wherein the transmitting the indication information of the demodulation result of the first PDSCH according to the first information comprises:

and when a second PDSCH sharing the same LBT sub-band exists in the same time domain unit with the first PDSCH, sending indication information containing demodulation results of the first PDSCH and the second PDSCH according to the demodulation results of the first PDSCH and the second PDSCH.

6. The method of claim 4, wherein the first information includes a first indicator indicating whether the first PDSCH shares the same LBT subband within the same time domain unit.

7. The method of claim 6, wherein the first indicator is a first value indicating that the first PDSCH and the second PDSCH share the same LBT subband within the same time domain unit; or alternatively

8. The method of claim 7, wherein the method further comprises:

9. The method of claim 5, wherein the first information further has a scrambling sequence; the scrambling sequence is used for scrambling the first information; the scrambling sequence includes information whether the first PDSCH shares the same LBT subband in the same time domain unit.

10. The method of claim 9, wherein the scrambling sequence indicates a third value indicating that the first PDSCH and the second PDSCH share a same LBT subband within a same time domain unit; or alternatively

The scrambling sequence indicates a fourth value indicating that the first PDSCH and the second PDSCH do not share the same LBT subband in the same time domain unit.

11. The method of claim 10, wherein the method further comprises:

12. An automatic retransmission indication apparatus for a network device, wherein the apparatus comprises:

a scrambling unit configured to scramble the first information by a scrambling sequence; the scrambling sequence contains information whether the PDSCH shares the same LBT sub-band in the same time domain unit;

a transmission unit configured to transmit the first information; the first information is used for indicating whether the scheduled physical downlink shared channel PDSCH shares the same listen before talk LBT subband in the same time domain unit; the first information includes a first indicator, where the first indicator is used to indicate whether the PDSCH shares the same LBT subband in the same time domain unit;

and a determining unit configured to determine a PDSCH that fails demodulation based on the first indicator or the scrambling sequence and the PDSCH demodulation result indication information when PDSCH sharing the same LBT subband in the same time domain unit.

13. The apparatus of claim 12, wherein the first indicator is a first value indicating that the first information scheduled PDSCH shares a same LBT subband within a same time domain unit as a second information scheduled PDSCH; or alternatively

14. The apparatus of claim 12, wherein the scrambling sequence indicates a third value indicating that the first information scheduled PDSCH shares a same LBT subband within a same time domain unit as a second information scheduled PDSCH; or alternatively

15. An automatic retransmission indication apparatus for a user equipment, wherein the apparatus comprises:

and a transmitting unit configured to transmit indication information of a demodulation result of the first PDSCH according to the first information.

16. The apparatus of claim 15, wherein the first determining unit is further configured to trigger the transmitting unit to transmit the indication information including the demodulation results of the first PDSCH and the second PDSCH according to the demodulation results of the first PDSCH and the second PDSCH when it is determined that a second PDSCH sharing the same LBT subband exists in the same time domain unit as the first PDSCH.

17. The apparatus of claim 16, wherein the first information comprises a first indicator indicating whether a first PDSCH shares a same LBT subband within a same time domain unit.

18. The apparatus of claim 17, wherein the first indicator is a first value indicating that the first PDSCH and the second PDSCH share a same LBT subband within a same time domain unit; or alternatively

19. The apparatus of claim 18, wherein the apparatus further comprises:

20. The apparatus of claim 15, wherein the first information further has a scrambling sequence; the scrambling sequence is used for scrambling the first information; the scrambling sequence includes information whether the first PDSCH shares the same LBT subband in the same time domain unit.

21. The apparatus of claim 20, wherein the scrambling sequence indicates a third value indicating that the first PDSCH and the second PDSCH share a same LBT subband within a same time domain unit; or alternatively

22. The apparatus of claim 21, wherein the apparatus further comprises:

23. A network device for indication of automatic retransmission comprising a processor, a transceiver, a memory and an executable program stored on the memory and executable by the processor, the processor executing the steps of the method of indication of automatic retransmission as claimed in any one of claims 1 to 3 when the executable program is run.

24. A user equipment for indication of automatic retransmission comprising a processor, a transceiver, a memory and an executable program stored on the memory and executable by the processor, the processor executing the steps of the method of indication of automatic retransmission according to any of claims 4 to 11 when the executable program is run.

25. A computer-readable storage medium having stored thereon an executable program which when executed by a processor implements the steps of the automatic retransmission indication method according to any one of claims 1 to 11.