CN107294663B - HARQ feedback method, device and receiving method for uplink transmission - Google Patents

HARQ feedback method, device and receiving method for uplink transmission Download PDF

Info

Publication number
CN107294663B
CN107294663B CN201610200831.2A CN201610200831A CN107294663B CN 107294663 B CN107294663 B CN 107294663B CN 201610200831 A CN201610200831 A CN 201610200831A CN 107294663 B CN107294663 B CN 107294663B
Authority
CN
China
Prior art keywords
feedback
subframe
harq feedback
current
user equipment
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201610200831.2A
Other languages
Chinese (zh)
Other versions
CN107294663A (en
Inventor
韩传华
邓云
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Spreadtrum Communications Shanghai Co Ltd
Original Assignee
Spreadtrum Communications Shanghai Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Spreadtrum Communications Shanghai Co Ltd filed Critical Spreadtrum Communications Shanghai Co Ltd
Priority to CN201610200831.2A priority Critical patent/CN107294663B/en
Publication of CN107294663A publication Critical patent/CN107294663A/en
Application granted granted Critical
Publication of CN107294663B publication Critical patent/CN107294663B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1812—Hybrid protocols; Hybrid automatic repeat request [HARQ]

Abstract

A method, a device and a method for HARQ feedback of uplink transmission are used for a base station, and the method for HARQ feedback of uplink transmission comprises the following steps: monitoring data sent by user equipment through a current unauthorized cell; determining HARQ feedback according to the monitoring result; when the right of use of the current unauthorized cell is not obtained in a specified feedback subframe, the HARQ feedback is sent to the user equipment through other available unauthorized cells in the feedback subframe, or the HARQ feedback is sent to the user equipment through the current unauthorized cell after the right of use of the current unauthorized cell is obtained in a preset time period after the feedback subframe; wherein the feedback subframe represents a subframe at a fixed timing position after a subframe corresponding to the data is transmitted by the user equipment. The technical scheme realizes the HARQ feedback of uplink transmission in the unauthorized cell.

Description

HARQ feedback method, device and receiving method for uplink transmission
Technical Field
The present invention relates to the field of wireless communication technologies, and in particular, to a HARQ feedback method, apparatus, and receiving method for uplink transmission.
Background
In the conventional long Term Evolution (L ong Term Evolution, L TE), an evolved NodeB (eNB) schedules transmission of Downlink data and transmission of Uplink data through Downlink Control Information (DCI). for transmission of Uplink data, the eNB may transmit an Uplink scheduling Grant (Uplink Grant) through Downlink Control Information format 0 (DCI 0).
In the prior art, in a Frequency Division Duplex (Frequency Division Duplex, FDD) L TE, a User Equipment (UE) receives DCI 0 belonging to the UE at a subframe n, knows AN Uplink scheduling grant of Uplink transmission, and indicates that data transmission is performed on a specified resource according to information in the Uplink scheduling grant at the subframe n + 4. the base station parses the Uplink data transmitted by the UE, if the Uplink data can be accurately received, the base station indicates AN Acknowledgement (ACK) on a Physical Hybrid Automatic retransmission Indicator Channel (PHICH) of AN n +8 subframe, if the Uplink data cannot be accurately received or is not received, the base station indicates a Negative answer (Negative Acknowledgement, NACK) on a Physical Hybrid Automatic retransmission Indicator Channel (PHICH) of the n +8 subframe, and if the Uplink data cannot be accurately received or is not received, the UE indicates that the UE transmits a Negative Acknowledgement (Negative Acknowledgement, NACK) on a time Division Duplex (downlink grant) Channel at a subframe n +8 subframe, and then the UE needs to listen to a downlink grant (PHICH) on a downlink grant Channel (PHICH) of a downlink grant (PHICH) of a subframe), and indicates that the UE needs to transmit Uplink grant (PHICH) and use a downlink grant (PHICH) spectrum, and a downlink grant (PHICH) of a downlink grant (PHICH) of a downlink spectrum, and a downlink grant (PHICH) of a downlink grant (HARQ spectrum), and a downlink grant (PHICH) of a downlink spectrum), and a downlink grant (HARQ spectrum), and a downlink grant of a downlink grant (PUSCH) of a downlink grant of a subframe n +8 subframe), and a downlink grant (PUSCH) of a downlink spectrum), and a downlink spectrum), if the Uplink grant (PUSCH) of a downlink grant of a downlink spectrum), and a downlink grant of a downlink spectrum, and a downlink grant of a downlink grant (PUSCH) of.
However, due to the listen-before-talk mechanism, the base station may not obtain the right of use of the unlicensed cell from the specified feedback resource, and may not use the licensed cell to perform downlink transmission normally in the specified subframe, so that the base station may not perform HARQ feedback on the uplink data transmission of the UE in this case, which causes inconvenience to the communication between the base station and the UE.
Disclosure of Invention
The technical problem solved by the invention is how to realize HARQ feedback of uplink transmission in an unauthorized cell.
In order to solve the above technical problem, an embodiment of the present invention provides an uplink HARQ feedback method, where the uplink HARQ feedback method is used for a base station, and the uplink HARQ feedback method includes: monitoring data sent by user equipment through a current unauthorized cell; determining HARQ feedback according to the monitoring result; when the right of use of the current unauthorized cell is not obtained in a specified feedback subframe, the HARQ feedback is sent to the user equipment through other available unauthorized cells in the feedback subframe, or the HARQ feedback is sent to the user equipment through the current unauthorized cell after the right of use of the current unauthorized cell is obtained in a preset time period after the feedback subframe; wherein the feedback subframe represents a subframe at a fixed timing position after a subframe corresponding to the data is transmitted by the user equipment.
Optionally, after obtaining the right to use the current unlicensed cell within a preset time period after the feedback subframe, sending the HARQ feedback to the user equipment through the current unlicensed cell includes: after the usage right of the current unauthorized cell is obtained in the preset time period after the feedback subframe, the HARQ feedback responding to the plurality of data is sequentially sent through the current unauthorized cell according to the sequence of the plurality of data sent by the user equipment in a plurality of subframes.
Optionally, after obtaining the right to use the current unlicensed cell within a preset time period after the feedback subframe, sending the HARQ feedback to the user equipment through the current unlicensed cell includes: after the usage right of the current unauthorized cell is obtained within the preset time period after the feedback subframe, according to the sequence of a plurality of data sent by the user equipment, sending the HARQ feedback by the current unauthorized cell in a combined feedback mode, wherein the combined feedback mode refers to sending the HARQ feedback responding to at least one part of the plurality of data after being combined.
Optionally, when all of at least a part of the plurality of data is successfully received, the HARQ feedback is acknowledgement feedback.
Optionally, in the feedback subframe, sending the HARQ feedback to the user equipment through the other available unlicensed cells includes: determining the other available unauthorized cells when communicating with the user equipment in a carrier aggregation manner, wherein the other unauthorized cells and the current unauthorized cell are configured to the user equipment; and transmitting the HARQ feedback to the user equipment through the other unauthorized cells in the feedback subframe.
In order to solve the above technical problem, an embodiment of the present invention further discloses an uplink HARQ feedback device, where the uplink HARQ feedback device is used in a base station, and the uplink HARQ feedback device includes: the monitoring unit is suitable for monitoring data sent by the user equipment through the current unauthorized cell; a determining unit adapted to determine HARQ feedback according to the monitored result; a feedback unit, adapted to send the HARQ feedback to the user equipment through other available unlicensed cells in a feedback subframe when a specified feedback subframe fails to obtain the right of use of the current unlicensed cell, or send the HARQ feedback to the user equipment through the current unlicensed cell after obtaining the right of use of the current unlicensed cell within a preset time period after the feedback subframe; wherein the feedback subframe represents a subframe at a fixed timing position after a subframe corresponding to the data is transmitted by the user equipment.
Optionally, the feedback unit includes: a first feedback subunit, adapted to, after obtaining the usage right of the current unlicensed cell within the preset time period after the feedback subframe, sequentially send, by the current unlicensed cell, the HARQ feedback in response to a plurality of data according to an order of the plurality of data sent by the user equipment in a plurality of subframes.
Optionally, the feedback unit includes: a second feedback subunit, adapted to, after obtaining the usage right of the current unlicensed cell within the preset time period after the feedback subframe, send, according to an order of multiple data sent by the user equipment, the HARQ feedback through the current unlicensed cell in a combined feedback manner, where the combined feedback manner refers to sending, after combining HARQ feedback in response to at least a part of the multiple data.
Optionally, when all of at least a part of the plurality of data is successfully received, the HARQ feedback is acknowledgement feedback.
Optionally, the feedback unit includes: an unlicensed cell determining subunit, configured to determine, when communicating with the user equipment in a carrier aggregation manner, the other unlicensed cells that can be used, where the other unlicensed cells and the current unlicensed cell have been configured to the user equipment; a third feedback subunit, adapted to send the HARQ feedback to the user equipment through the other unlicensed cells in the feedback subframe.
A HARQ feedback receiving method of uplink transmission is used for user equipment, and comprises the following steps: after data is sent to a base station through a current unauthorized cell, monitoring HARQ feedback which is sent by the base station and responds to the data through the current unauthorized cell; when the HARQ feedback cannot be obtained from the base station through the current unauthorized cell in a designated receiving subframe, receiving the HARQ feedback through other unauthorized cells in the receiving subframe, or obtaining the HARQ feedback from the base station through the current unauthorized cell within a preset time period after the receiving subframe; and the receiving subframe and the subframe of the user equipment for transmitting data have subframes with fixed time sequence positions.
Optionally, obtaining the HARQ feedback from the base station through the current unlicensed cell within a preset time period after the receiving the subframe includes: when a plurality of data sent by the user equipment in a plurality of subframes do not receive the corresponding HARQ feedback, the user equipment receives the HARQ feedback of the base station responding to the plurality of data in one receiving subframe.
Compared with the prior art, the technical scheme of the embodiment of the invention has the following beneficial effects:
the base station of the embodiment monitors data sent by user equipment through a current unauthorized cell; determining HARQ feedback according to the monitoring result; when the right of use of the current unauthorized cell is not obtained in a specified feedback subframe, the HARQ feedback is sent to the user equipment through other available unauthorized cells in the feedback subframe, or the HARQ feedback is sent to the user equipment through the current unauthorized cell after the right of use of the current unauthorized cell is obtained in a preset time period after the feedback subframe; wherein the feedback subframe represents a subframe at a fixed timing position after a subframe corresponding to the data is transmitted by the user equipment. And sending the HARQ feedback to the user equipment through other usable unauthorized cells, or sending the HARQ feedback after the use right of the current unauthorized cell is obtained in a preset time period after the feedback subframe, so that the HARQ feedback of normal uplink transmission of the base station in the unauthorized cell is realized, and the uninterrupted communication between the base station and the user equipment is ensured.
Further, after obtaining the right of use of the current unlicensed cell within the preset time period after the feedback subframe, the base station sequentially sends the HARQ feedback responding to the multiple data through the current unlicensed cell according to the sequence of the multiple data sent by the user equipment in multiple subframes; after obtaining the right to use the current unauthorized cell within the preset time period after the feedback subframe, the base station sends the HARQ feedback through the current unauthorized cell in a combined feedback mode according to the sequence of the multiple data sent by the user equipment, where the combined feedback mode refers to sending the HARQ feedback responding to at least a part of the multiple data after being combined. By configuring a preset time period, once the right of use of the current unauthorized cell is obtained, the HARQ feedback is sent in sequence or in a combined manner according to the sequence of a plurality of sending subframes in data sent by user equipment, thereby further ensuring the uninterrupted communication between the base station and the user equipment.
Further, when communicating with the user equipment in a carrier aggregation manner, determining the other unlicensed cells that can be used, where the other unlicensed cells and the current unlicensed cell are configured to the user equipment. By adopting different unauthorized carriers during carrier aggregation to send the HARQ feedback, the HARQ feedback of normal uplink transmission of the base station in an unauthorized cell is realized, and the uninterrupted communication between the base station and the user equipment is further ensured.
Drawings
Fig. 1 is a flowchart of a HARQ feedback method for uplink transmission according to an embodiment of the present invention;
fig. 2 is a schematic diagram of an HARQ feedback method for uplink transmission according to an embodiment of the present invention;
fig. 3 is a schematic diagram of another HARQ feedback method for uplink transmission according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of an uplink HARQ feedback apparatus according to an embodiment of the present invention.
Detailed Description
As described in the background art, in the prior art, due to a listen-before-talk mechanism, a base station may not be able to obtain a right to use an unlicensed cell in a specified feedback resource, and may not be able to use the unlicensed cell to perform downlink transmission normally in a specified subframe.
The transmission of the Physical Hybrid ARQ indicator channel (PHICH) in the embodiments of the present invention may be organized in the form of PHICH groups, where multiple PHICH channels in 1 PHICH group occupy the same time-frequency domain Physical resource, and the same time-frequency domain Physical resource is occupied by using a multiplexing manner of orthogonal spreading sequences. For example, in case of a normal Cyclic Prefix (CP), one PHICH group multiplexes 8 PHICH channels, i.e., the base station can indicate ACK/NACK of its uplink transmission to 8 UEs (assuming that one UE transmits only one transport block). The PHICH channel is jointly determined by the identity of the PHICH group and the identity within the group. The UE determines the PHICH group identifier and the intra-group identifier by using the position (index of the minimum Physical resource block where the UE transmits uplink data in the first slot) of a Physical Resource Block (PRB) occupied for transmitting the uplink data and a demodulated Reference Signal (DMRS) index.
Specifically, the formula for determining the PHICH group identifier and the intra-group identifier may be:
Figure BDA0000955878100000061
Figure BDA0000955878100000062
wherein the content of the first and second substances,
Figure BDA0000955878100000063
an identifier representing a PHICH group;
Figure BDA0000955878100000064
representing PHICH group identification; i islowestIndicating the minimum physical resource block index used by the UE for uplink transmission in the first time slot; n isDMRSCyclic Shift (Cyclic Shift) indicating DMRS used by the UE;
Figure BDA0000955878100000065
indicating the number of PHICH groups;
Figure BDA0000955878100000066
the size of a spreading factor (used for PHICH modulation) in PHICH modulation is shown.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
Fig. 1 is a flowchart of an uplink HARQ feedback method according to an embodiment of the present invention, which may be used in a communication system such as an L TE system, and a detailed description is provided below with reference to fig. 1 for a specific embodiment of the uplink HARQ feedback method.
Step S101: and the base station monitors data sent by the user equipment through the current unauthorized cell.
In a specific embodiment, after obtaining an Uplink scheduling grant of a current unlicensed cell according to Downlink Control Information (DCI) of the current unlicensed cell, a User Equipment (UE) transmits data on a Physical Uplink Shared Channel (PUSCH) through the current unlicensed cell, where the transmitted data may include Control Information and Uplink data to be transmitted, according to an existing protocol, a transmission carrier of a Hybrid automatic repeat request Indicator Channel (PHICH) and a transmission carrier of DCI Information corresponding to the Uplink grant must be the same, so that the base station monitors data transmitted by the UE through the current unlicensed cell, before step S101, the UE has accessed to the base station in a connected state through a licensed (L) frequency, the UE has a primary cell on a L licensed frequency, the UE receives a system message, a Radio message, and a Radio Resource Control (Control) message from the primary cell, and the UE is configured with a large number of Downlink frequency channels (RRC) and configured with a plurality of Uplink frequency channels (RRC) through the base station, and the UE is assumed to transmit Uplink scheduling request message through the Uplink Shared Channel.
It can be understood that in Carrier aggregation in L TE, one serving cell (SCell) corresponds to one Component Carrier (Component Carrier), and thus, the current unlicensed cell is one Component Carrier on the unlicensed Carrier frequency.
Step S102: and determining HARQ feedback according to the monitoring result.
In specific implementation, a monitoring result is obtained through step S101, and HARQ feedback is determined based on the monitoring result. Specifically, the HARQ feedback includes Acknowledgement (ACK) and Negative Acknowledgement (NACK). If the uplink data sent by the UE can be accurately received, determining the HARQ feedback as confirmation feedback; and if the uplink data sent by the UE cannot be accurately received or the uplink data sent by the UE is not received, determining that the HARQ feedback is negative feedback.
In a specific implementation, when the right to use the current unlicensed cell is available in a specified feedback subframe (a feedback subframe represents a subframe at a fixed timing position after the subframe corresponding to the data is transmitted by the UE), the determined HARQ feedback may be transmitted in the specified feedback subframe by the current unlicensed cell, and the feedback subframe represents a subframe at a fixed timing position after the UE transmits the data.
When the right of use of the current unlicensed cell is not obtained in a designated feedback subframe, the HARQ feedback manner is determined through the following step S103.
Step S103: and when the right of use of the current unauthorized cell cannot be obtained in a specified feedback subframe, the HARQ feedback is sent to the user equipment through other available unauthorized cells in the feedback subframe, or the HARQ feedback is sent to the user equipment through the current unauthorized cell after the right of use of the current unauthorized cell is obtained in a preset time period after the feedback subframe.
In a specific implementation, when the user equipment communicates with the user equipment in a carrier aggregation manner, the L BT is used to determine the other unlicensed cells that can be used, and both the other unlicensed cells and the current unlicensed cell are already configured to the user equipment through RRC signaling.
For example, referring to fig. 2, fig. 2 is a schematic diagram of a HARQ feedback method for uplink transmission according to an embodiment of the present invention.
As shown in fig. 2, a UE may configure a plurality of downlink unlicensed cells L AA scells 1 and L AA scells 2, in which case, a base station may communicate with the UE by carrier aggregation, using an unlicensed spectrum (or frequency) is referred to as a licensed Assisted Access (L acquired Assisted Access, L AA) technology, and by this technology L a TE network may configure the UE to use an unlicensed frequency band, that is, the UE first accesses the network by a licensed spectrum, and the network configures the UE with an unlicensed spectrum by carrier aggregation.
In a specific implementation, the UE receives the authorized scheduling of uplink transmission (uplink, U L) through the current unlicensed cell L AASCell1, and after transmitting uplink data through the subframe 1, where a subframe where the UE transmits data is called a transmission subframe, the UE expects to receive HARQ feedback through the current unlicensed cell L AA SCell1 in the feedback subframe 5. due to the adoption of the L BT channel contention access mechanism, when the current unlicensed cell L AA SCell1 is occupied by other devices, the base station cannot obtain the use right of the current unlicensed cell L AA SCell1 in the feedback subframe 5, but can obtain the use right of frequencies corresponding to other unlicensed cells L AA 2 in the feedback subframe 5, so that the base station performs HARQ feedback on the uplink transmission of the UE through other unlicensed cells L AA SCell2 in the feedback subframe 5.
Continuing with fig. 2, after transmitting subframe 1, the UE expects to receive a feedback signal in feedback subframe 5, and when monitoring that no downlink signal is transmitted in feedback subframe 5 of current unlicensed cell L AA SCell1, and a downlink signal is transmitted in subframe 5 of other unlicensed cell L AA SCell2, the base station performs HARQ feedback on uplink transmission of the UE in subframe 5 through other unlicensed cell L AA SCell2, and the UE receives HARQ feedback that the UE transmits data in subframe 1 through other unlicensed cell L AA SCell2, at this time, the UE needs to detect L AA SCell2 on PHICH channel, and then determines PHICH channel (PHICH group identifier and intra-group identifier) for receiving HARQ feedback according to physical resource block information occupied by transmitting data in subframe 1.
Continuing to refer to step S103, in a specific implementation, when the right of use of the current unlicensed cell is not obtained in a specified feedback subframe, after the right of use of the current unlicensed cell is obtained within the preset time period after the feedback subframe, HARQ feedback responding to the multiple data is sequentially sent by the current unlicensed cell according to an order in which the user equipment sends the multiple data in multiple subframes of the current unlicensed cell.
For example, when communicating with the UE in a carrier aggregation manner, after subframe n transmits data on PUSCH through a current unlicensed cell, the UE needs to transmit certain HARQ feedback through the current unlicensed cell at subframe n + 4. due to the channel contention access mechanism of L BT, when the current unlicensed cell is occupied by other devices, the base station cannot obtain the usage right of the frequency corresponding to the current unlicensed cell at subframe n +4, and cannot transmit HARQ feedback at subframe n + 4.
It can be understood that, after a preset time period after the feedback subframe, the base station still cannot obtain the usage right of the frequency corresponding to the current unlicensed cell, and then default HARQ feedback may be set. The default HARQ feedback may be acknowledgement feedback or negative feedback. That is to say, after the preset time period after the feedback subframe, the UE does not receive the HARQ feedback sent by the base station, and the UE defaults the HARQ feedback to be acknowledgment feedback, or the UE defaults the HARQ feedback to be negative feedback.
It should be noted that the preset time period may be preset by a protocol, or may be notified to the UE by the base station through Radio Resource Control (RRC) signaling.
With reference to step S103, in a specific implementation, when the usage right of the current unlicensed cell is not obtained in a specified feedback subframe (a subframe that needs to send feedback), after the usage right of the current unlicensed cell is obtained within the preset time period after the feedback subframe, according to the order in which the user equipment sends data, the HARQ feedback is sent by the current unlicensed cell in a combined feedback manner, where the combined feedback manner is to send the HARQ feedback, which is sent to the UE in one subframe after combining the HARQ feedback that is in response to the UE sending at least part of data in multiple subframes. Specifically, when the HARQ feedback is sent in a combined feedback manner, uplink data sent by the UE in multiple subframes may be fed back on the PHICH of the same subframe.
In a specific implementation, the HARQ feedback in response to at least a portion of uplink data transmitted by the UE in multiple subframes may be determined as follows: if the uplink data sent by the UE in the plurality of subframes are all successfully received by the base station, the HARQ feedback is ACK, namely an AND mechanism is adopted to determine the HARQ feedback; and if one data is not successfully received, the HARQ feedback is NACK. By the method, the data transmission of the UE in a plurality of subframes can be fed back by adopting fewer feedback resources. During feedback combining, a base station can divide a plurality of PHICH channels for UE uplink transmission in a plurality of subframes on the PHICH, the UE determines the PHICH channel (the identifier of the PHICH group and the identifier in the group) corresponding to the first uplink transmission according to the existing mechanism, for the feedback of subsequent uplink transmission, the UE can sequentially determine the PHICH channels according to the identifier in the group plus 1, and if no PHICH channel remains in the group, the UE and the next PHICH group determine PHICH resources; the corresponding base station also adopts a similar method to determine the corresponding relation of PHICH feedback, so that the UE can correctly receive and combine feedback.
For example, referring to fig. 3, fig. 3 is a schematic diagram of another HARQ feedback method for uplink transmission according to an embodiment of the present invention. The manner of combining feedback is described in detail below with reference to fig. 3.
As shown in FIG. 3, after a UE receives scheduling of uplink transmission (U L) through a current unlicensed cell, after uplink data is sent through a sending subframe 1, a sending subframe 2 and a sending subframe 3, a base station needs to send HARQ feedback to the UE on the sending subframe 1, the sending subframe 2 and the sending subframe 3 respectively through a feedback subframe 5, a feedback subframe 6 and a feedback subframe 7. due to the adoption of a channel contention access mechanism of L BT, the base station cannot obtain the use right of the current unlicensed cell when the feedback subframe 5 is occupied by other equipment, if the base station obtains the use right of the current unlicensed cell at the subframe 6, the base station can judge that the feedback is delayed by one subframe, so that HARQ feedback can be carried out on the data sent by the UE at the sending subframe 1 and the sending subframe 2 at the feedback subframe 6, and HARQ feedback is carried out on the data sent by the UE at the sending subframe 3 at the feedback subframe 7.
In a specific implementation, the UE expects to receive HARQ feedback transmitted by the base station in the feedback subframe 5, and can determine whether the base station transmits a downlink signal according to whether the base station transmits a cell-specific reference signal or the like. If the UE does not receive the downlink signal sent by the base station in the feedback subframe 5, the UE continues to detect whether the base station sends the downlink signal in the feedback subframe 6, and once the downlink signal is detected, the UE may determine that the base station performs a combined HARQ feedback on the data sent by the base station in the subframe 1 and the subframe 2 in the subframe.
It can be appreciated that combining HARQ feedback in response to a UE transmitting at least a portion of data in multiple subframes can be based on the principle that feedback time delay is minimal. That is, when the base station obtains the right of use of the current unlicensed cell in the current subframe, in addition to performing HARQ feedback in response to the transmission data of the UE in the corresponding subframe, if there is unrevealed HARQ feedback, combining a plurality of HARQ feedbacks in the current subframe and transmitting the combined HARQ feedbacks to the UE.
In this embodiment, the UE further determines a PHICH resource corresponding to the uplink data to correctly obtain ACK or NACK information. For example, the UE determines the PHICH group identifier and the intra-group identifier by using the location of the physical resource block occupied by transmitting the uplink data (the index of the minimum physical resource block in which the UE transmits the uplink data in the first slot) and the reference signal index for demodulation, thereby determining the PHICH channel. Specifically, for sending the HARQ feedback by adopting a combined feedback mode, the PHICH channels (the identifier of the PHICH group and the identifier in the group) corresponding to the first uplink transmission of the UE may be determined, for the feedback of the subsequent uplink transmission, the PHICH channels may be sequentially determined by the UE in a manner of adding 1 to the identifier in the group, and if there is no remaining PHICH in the group, the PHICH resources are determined by the UE and the next PHICH group; the corresponding base station also adopts a similar method to determine the corresponding relation of PHICH feedback, so that the UE can correctly receive and combine feedback.
Fig. 4 is a schematic structural diagram of an uplink HARQ feedback apparatus according to an embodiment of the present invention. A detailed description is given below to a specific embodiment of the HARQ feedback device for uplink transmission with reference to fig. 4.
Referring to fig. 4, the HARQ feedback device for uplink transmission includes: a monitoring unit 401, a determination unit 402 and a feedback unit 403. The feedback unit 403 includes a first feedback subunit 404, a second feedback subunit 405, an unlicensed cell determining subunit 406, and a third feedback subunit 407.
Wherein, the monitoring unit 401 is adapted to monitor data sent by the user equipment through the current unauthorized cell; the determining unit 402 is adapted to determine HARQ feedback according to the result of the monitoring; the feedback unit 403 is adapted to send the HARQ feedback to the user equipment through other available unlicensed cells in a feedback subframe when the specified feedback subframe fails to obtain the right of use of the current unlicensed cell, or send the HARQ feedback to the user equipment through the current unlicensed cell after obtaining the right of use of the current unlicensed cell within a preset time period after the feedback subframe. Specifically, the feedback subframe represents a subframe at a fixed timing position after a subframe corresponding to the data is transmitted by the user equipment.
In a specific implementation, the first feedback sub-unit 404 is adapted to, after obtaining the usage right of the current unlicensed cell within the preset time period after the feedback subframe, sequentially send, by the current unlicensed cell, the HARQ feedback in response to a plurality of data according to an order of the plurality of data sent by the user equipment in a plurality of subframes.
It can be understood that, after a preset time period after the feedback subframe, the base station still cannot obtain the usage right of the frequency corresponding to the current unlicensed cell, and then default HARQ feedback may be set. The default HARQ feedback may be acknowledgement feedback or negative feedback. That is to say, after the preset time period after the feedback subframe, the UE does not receive the HARQ feedback sent by the base station, and the UE defaults the HARQ feedback to be acknowledgment feedback, or the UE defaults the HARQ feedback to be negative feedback.
In a specific implementation, the second feedback subunit 405 is adapted to, after obtaining the usage right of the current unlicensed cell within the preset time period after the feedback subframe, send, by using a combined feedback manner through the current unlicensed cell, at least a part of the plurality of data according to an order of the plurality of data sent by the user equipment, where the combined feedback manner refers to sending, after combining, HARQ feedback in response to at least a part of the plurality of data. Specifically, when all of at least a part of the plurality of data is successfully received, the HARQ feedback is acknowledgement feedback. Specifically, the HARQ feedback in response to at least a portion of the plurality of data may be determined as follows: if all the data transmitted by at least one part of the transmission subframes in the plurality of transmission subframes are successfully received, the HARQ feedback is ACK; and in at least one part of the plurality of sending subframes, the HARQ feedback is NACK as long as the sent data of one sending subframe is not successfully received.
It should be noted that the transmission subframes corresponding to at least a part of the plurality of transmission subframes are consecutive in time.
It should be noted that the preset time period may be preset by a protocol, or may be notified to the UE by the base station through Radio Resource Control (RRC) signaling.
In a specific implementation, the unlicensed cell determining subunit 406 is adapted to determine the other unlicensed cells that can be used when communicating with the user equipment in a carrier aggregation manner, where the other unlicensed cells and the current unlicensed cell are configured to the user equipment; a third feedback sub-unit 407 is configured to send the HARQ feedback to the ue through the other unlicensed cells in the feedback subframe.
The detailed description of the embodiments of the present invention may refer to the corresponding embodiments described above, and will not be repeated herein.
The embodiment of the invention also discloses a HARQ feedback receiving method of uplink transmission, which is used for user equipment and comprises the following steps: after data is sent to a base station through a current unauthorized cell, monitoring HARQ feedback which is sent by the base station and responds to the data through the current unauthorized cell; when the HARQ feedback cannot be obtained from the base station through the current unauthorized cell in a designated receiving subframe, receiving the HARQ feedback through other unauthorized cells in the receiving subframe, or obtaining the HARQ feedback from the base station through the current unauthorized cell within a preset time period after the receiving subframe; and the receiving subframe and the subframe of the user equipment for transmitting data have subframes with fixed time sequence positions.
In a specific implementation, obtaining the HARQ feedback from the base station through the current unlicensed cell within a preset time period after the subframe is received includes: when a plurality of data sent by the user equipment in a plurality of subframes do not receive the corresponding HARQ feedback, the user equipment receives the HARQ feedback of the base station responding to the plurality of data in one receiving subframe.
The detailed description of the embodiments of the present invention may refer to the corresponding embodiments described above, and will not be repeated herein.
Those skilled in the art will appreciate that all or part of the steps in the methods of the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer-readable storage medium, and the storage medium may include: ROM, RAM, magnetic or optical disks, and the like.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.

Claims (10)

1. A HARQ feedback method of uplink transmission is used for a base station, and is characterized by comprising the following steps:
monitoring data sent by user equipment through a current unauthorized cell;
determining HARQ feedback according to the monitoring result;
when the right of use of the current unauthorized cell cannot be obtained in a specified feedback subframe, after the right of use of the current unauthorized cell is obtained within a preset time period after the feedback subframe, the HARQ feedback is sent to the user equipment through the current unauthorized cell;
after a preset time period after the feedback subframe, the use right of the frequency corresponding to the current unauthorized cell still cannot be obtained, and then default HARQ feedback is taken as the HARQ feedback;
wherein the feedback subframe represents a subframe at a fixed timing position after a subframe corresponding to the data is transmitted by the user equipment.
2. The HARQ feedback method of claim 1, wherein after obtaining the right to use the current unlicensed cell within a preset time period after the feedback subframe, sending the HARQ feedback to the ue through the current unlicensed cell comprises:
after the usage right of the current unauthorized cell is obtained in the preset time period after the feedback subframe, the HARQ feedback responding to the plurality of data is sequentially sent through the current unauthorized cell according to the sequence of the plurality of data sent by the user equipment in a plurality of subframes.
3. The HARQ feedback method of claim 1, wherein after obtaining the right to use the current unlicensed cell within a preset time period after the feedback subframe, sending the HARQ feedback to the ue through the current unlicensed cell comprises:
after the usage right of the current unauthorized cell is obtained within the preset time period after the feedback subframe, according to the sequence of a plurality of data sent by the user equipment, sending the HARQ feedback by the current unauthorized cell in a combined feedback mode, wherein the combined feedback mode refers to sending the HARQ feedback responding to at least one part of the plurality of data after being combined.
4. The HARQ feedback method according to claim 3, wherein the HARQ feedback is acknowledgement feedback when all of the at least one of the plurality of data is received successfully.
5. An uplink transmission HARQ feedback apparatus, configured for a base station, includes:
the monitoring unit is suitable for monitoring data sent by the user equipment through the current unauthorized cell;
a determining unit adapted to determine HARQ feedback according to the monitored result;
a feedback unit, adapted to send the HARQ feedback to the user equipment through the current unlicensed cell after obtaining the right to use the current unlicensed cell within a preset time period after a feedback subframe when a specified feedback subframe fails to obtain the right to use the current unlicensed cell; after a preset time period after the feedback subframe, the use right of the frequency corresponding to the current unauthorized cell still cannot be obtained, and then default HARQ feedback is taken as the HARQ feedback;
wherein the feedback subframe represents a subframe at a fixed timing position after a subframe corresponding to the data is transmitted by the user equipment.
6. The HARQ feedback apparatus according to claim 5, wherein the feedback unit comprises: a first feedback subunit, adapted to, after obtaining the usage right of the current unlicensed cell within the preset time period after the feedback subframe, sequentially send, by the current unlicensed cell, the HARQ feedback in response to a plurality of data according to an order of the plurality of data sent by the user equipment in a plurality of subframes.
7. The HARQ feedback apparatus according to claim 5, wherein the feedback unit comprises: a second feedback subunit, adapted to, after obtaining the usage right of the current unlicensed cell within the preset time period after the feedback subframe, send, according to an order of multiple data sent by the user equipment, the HARQ feedback through the current unlicensed cell in a combined feedback manner, where the combined feedback manner refers to sending, after combining HARQ feedback in response to at least a part of the multiple data.
8. The HARQ feedback apparatus of claim 7, wherein the HARQ feedback is acknowledgement feedback when all of at least some of the plurality of data is received successfully.
9. A HARQ feedback receiving method of uplink transmission is used for user equipment, and is characterized by comprising the following steps:
after data is sent to a base station through a current unauthorized cell, monitoring HARQ feedback which is sent by the base station and responds to the data through the current unauthorized cell;
obtaining the HARQ feedback from the base station through the current unlicensed cell within a preset time period after the reception subframe when the HARQ feedback cannot be obtained from the base station through the current unlicensed cell at a designated reception subframe;
after a preset time period after the feedback subframe, the use right of the frequency corresponding to the current unauthorized cell still cannot be obtained, and then default HARQ feedback is taken as the HARQ feedback;
and the receiving subframe and the subframe of the user equipment for transmitting data have subframes with fixed time sequence positions.
10. The method of claim 9, wherein obtaining the HARQ feedback from the base station through the current unlicensed cell within a preset time period after the receiving the subframe comprises:
when a plurality of data sent by the user equipment in a plurality of subframes do not receive the corresponding HARQ feedback, the user equipment receives the HARQ feedback of the base station responding to the plurality of data in one receiving subframe.
CN201610200831.2A 2016-03-31 2016-03-31 HARQ feedback method, device and receiving method for uplink transmission Active CN107294663B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201610200831.2A CN107294663B (en) 2016-03-31 2016-03-31 HARQ feedback method, device and receiving method for uplink transmission

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201610200831.2A CN107294663B (en) 2016-03-31 2016-03-31 HARQ feedback method, device and receiving method for uplink transmission

Publications (2)

Publication Number Publication Date
CN107294663A CN107294663A (en) 2017-10-24
CN107294663B true CN107294663B (en) 2020-07-21

Family

ID=60087448

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201610200831.2A Active CN107294663B (en) 2016-03-31 2016-03-31 HARQ feedback method, device and receiving method for uplink transmission

Country Status (1)

Country Link
CN (1) CN107294663B (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI786259B (en) * 2018-01-24 2022-12-11 大陸商Ｏｐｐｏ廣東移動通信有限公司 Data transmission method, device, and computer readable medium
WO2019184061A1 (en) * 2018-03-28 2019-10-03 华为技术有限公司 Hybrid automatic repeat request method, network device, and terminal
CN110635868B (en) * 2018-06-21 2021-02-09 维沃移动通信有限公司 HARQ-ACK processing method and device for hybrid automatic repeat request feedback information
CN110650536B (en) * 2018-06-26 2022-12-13 珠海市魅族科技有限公司 Method for indicating reception of acknowledgement message frame and method for receiving acknowledgement message frame
CN111262670B (en) * 2019-01-11 2023-02-03 维沃移动通信有限公司 Hybrid automatic repeat acknowledgement feedback information transmission method and terminal equipment

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104812032A (en) * 2015-04-10 2015-07-29 宇龙计算机通信科技(深圳)有限公司 Method and device for using DRX in non-authorized frequency band
CN104901775A (en) * 2014-03-09 2015-09-09 上海朗帛通信技术有限公司 Method and device for communicating on unauthorized frequency spectrum

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101657986A (en) * 2007-04-13 2010-02-24 高通股份有限公司 adaptive synchronous harq transmission
US20110268045A1 (en) * 2010-04-30 2011-11-03 Youn Hyoung Heo System and method for uplink control information transmission in carrier aggregation
CN102281131B (en) * 2010-06-13 2013-11-27 电信科学技术研究院 Information configuration and feedback method in multicarrier system, system thereof and equipment thereof
CN104283653B (en) * 2013-07-11 2017-07-28 普天信息技术研究院有限公司 Transmit feedback method
US10326577B2 (en) * 2013-08-13 2019-06-18 Qualcomm Incorporated Harq design for LTE in unlicensed spectrum utilizing individual ACK/NACK

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104901775A (en) * 2014-03-09 2015-09-09 上海朗帛通信技术有限公司 Method and device for communicating on unauthorized frequency spectrum
CN104812032A (en) * 2015-04-10 2015-07-29 宇龙计算机通信科技(深圳)有限公司 Method and device for using DRX in non-authorized frequency band

Also Published As

Publication number Publication date
CN107294663A (en) 2017-10-24

Similar Documents

Publication Publication Date Title
US20210266114A1 (en) Node and method for downlink scheduling and hybrid automatic repeat request timing
US11290215B2 (en) Uplink HARQ procedure for MTC operation
EP3363246B1 (en) Uplink control channel for low latency communications
US10735170B2 (en) ACK/NACK feedback method and user equipment
US11671295B2 (en) Method and NB wireless device for determining whether or not to transmit SR
US8954064B2 (en) Arrangement and method for identifying PUCCH format 3 resources
KR101517310B1 (en) Communication method and device in a wireless communication system
JP6340649B2 (en) Terminal apparatus, base station apparatus, and communication method
EP2797374B1 (en) Mobile communications system, base station device, mobile station device, communication method, and integrated circuit
US8345605B2 (en) Transmission of bundled feedback in wireless networks
EP3013092B1 (en) Terminal apparatus, base station apparatus, integrated circuit, and radio communication method
US10057032B2 (en) Method and device for transmitting data for half-duplex device
JP6409230B2 (en) Terminal apparatus, base station apparatus, and communication method
CN107294663B (en) HARQ feedback method, device and receiving method for uplink transmission
EP2542009A1 (en) Method of handling uplink control information reporting and related communication device
CN111050408B (en) Feedback method and system for uplink transmission, base station and user equipment
WO2012176602A1 (en) Mobile communication system, base station device, mobile station device, communication method and integrated circuit
EP3427533B1 (en) Techniques for acknowledging scheduling request transmissions on a contention-based physical uplink shared channel
WO2015139435A1 (en) Method for sending/receiving uplink control channel aggregation, terminal and base station
US20220132476A1 (en) Terminal and transmission method
CN107483165B (en) Method, device, base station and user equipment for combining feedback
US20220141071A1 (en) Terminal apparatus, base station apparatus, and communication method

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant
CB03 Change of inventor or designer information
CB03 Change of inventor or designer information

Inventor after: Han Chuanhua

Inventor before: Han Chuanhua

Inventor before: Deng Yun