WO2009155826A1 - 上行链路数据传输方法、终端装置 - Google Patents

上行链路数据传输方法、终端装置 Download PDF

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Publication number
WO2009155826A1
WO2009155826A1 PCT/CN2009/072210 CN2009072210W WO2009155826A1 WO 2009155826 A1 WO2009155826 A1 WO 2009155826A1 CN 2009072210 W CN2009072210 W CN 2009072210W WO 2009155826 A1 WO2009155826 A1 WO 2009155826A1
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WIPO (PCT)
Prior art keywords
mcs
uplink data
pdcch signaling
data transmission
normal
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PCT/CN2009/072210
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English (en)
French (fr)
Inventor
高闻
Original Assignee
华为技术有限公司
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Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Publication of WO2009155826A1 publication Critical patent/WO2009155826A1/zh
Priority to US12/975,602 priority Critical patent/US20110093755A1/en

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/12Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16Arrangements 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
    • H04L1/18Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1867Arrangements specially adapted for the transmitter end
    • H04L1/1896ARQ related signaling
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/0001Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0002Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate
    • H04L1/0003Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate by switching between different modulation schemes
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/12Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16Arrangements 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
    • H04L1/18Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1812Hybrid protocols; Hybrid automatic repeat request [HARQ]
    • H04L1/1819Hybrid protocols; Hybrid automatic repeat request [HARQ] with retransmission of additional or different redundancy

Definitions

  • the present invention relates to the field of wireless communications, and in particular, to an uplink data transmission method and a terminal device. Background technique
  • each data transmitted on a wireless air interface link needs to be scheduled, and the wireless air interface link is divided into an uplink and a downlink.
  • Hybrid Automatic Repeat reQuest uses synchronous transmission, including synchronous adaptive transmission and synchronous non-adaptive transmission.
  • the uplink transmission includes the first transmission and retransmission of data.
  • the first transmission of each data requires an UL grant (Uplink grant) for indication, and in the retransmission, if it is non-adaptive transmission, there is no
  • the UL grant indicates, and the synchronous adaptive transmission requires a UL grant to re-instruct the retransmission resource.
  • the UL grant is used to indicate the uplink transmission resource, and is included in the Physical Downlink Control Channel (PDCCH) signaling, where the PDCCH includes the allocated radio resource, Modulation Code Scheme (MCS), And HARQ related information such as Redundancy Version (RV) and New Data Indicator (KDI).
  • PDCCH Physical Downlink Control Channel
  • MCS Modulation Code Scheme
  • HARQ related information such as Redundancy Version (RV) and New Data Indicator (KDI).
  • the change of the NDI can be used to determine whether the transmitted data is the first transmitted data or the retransmitted data, and the DI is 1 bit.
  • the NDI changes incrementally the identifier is transmitted for the first time, otherwise, the retransmission is performed, for example, :
  • NDI When NDI is 0, it becomes 1 after the increase, and when NDI is 1, it increases to 0.
  • Table 1 in the uplink transmission, three values (11101, 11110, and 11111) are reserved in the 5-bit MCS to indicate RV1, RV2, and when the MCS is a value other than the above three values, the default is RV0.
  • the user equipment (User Equipment, UE) has a loss probability of one percent when receiving the PDCCH signaling. If the uplink indication indicates that the first transmission PDCCH signaling is lost, the UE cannot obtain the uplink first transmission scheduling PDCCH signaling.
  • the MCS needs to schedule retransmissions. There are three cases when scheduling retransmissions:
  • the UE When there is no new PDCCH signaling scheduled retransmission, the UE does not perform any action, indicating that the scheduled air interface resource is hung until the base station schedules allocation of the resource next time. This situation only depends on the method of reducing the loss probability. To eliminate.
  • the UE may perform normal uplink transmission according to the currently received radio resource and the MCS.
  • the UE When the UE loses the uplink first transmission scheduling PDCCH signaling, if the RV of the next PDCCH signaling is received by the UE as RV1, V2, or RV3, the PDCCH signaling is not received before the uplink first transmission is scheduled. The MCS in the PDCCH signaling is scheduled. Moreover, since the NDI also undergoes incremental changes, the UE will use the transmission as the first transmission, but there is no MCS in the received PDCCH signaling. At this time, the UE continues to schedule uplink transmission, which will result in packet loss and error indication physical. Layers send and other issues.
  • Embodiments of the present invention provide an uplink data transmission method and a terminal device.
  • an embodiment of the present invention provides an uplink data transmission method, including: receiving, by a base station, a first physical downlink control PDCCH signaling; and determining, according to the new data in the first PDCCH signaling, an NDI.
  • the modulation coding mode MCS in the first PDCCH signaling is normal coding, and uplink data transmission is performed.
  • an embodiment of the present invention provides a terminal apparatus, including: a receiving unit, configured to receive a first physical downlink control PDCCH signaling sent by a base station; and a determining unit, configured to receive, according to the receiving unit, When the new data in the PDCCH signaling indicates that the NDI is determined to be the first transmission of the data, it is determined whether the MCS in the first PDCCH signaling is a normal coding mode, and the transmission unit is configured to: when the determining unit determines that the MCS is a normal coding In the mode, uplink data transmission is performed.
  • the UE determines that the MCS in the PDCCH signaling sent by the base station is normal according to the first transmission of the data in the PDCCH signaling sent by the received base station in the uplink data transmission.
  • the MCS is in the normal coding mode, the uplink data transmission is performed, thereby ensuring the validity of the uplink data transmission.
  • the uplink data is transmitted, the data transmission is not performed without packet loss or error.
  • FIG. 1 is a schematic flowchart of an uplink data transmission method according to a first embodiment of the present invention
  • FIG. 2 is a schematic flowchart diagram of an uplink data transmission method according to a second embodiment of the present invention
  • the UE After performing the last uplink data transmission, the UE saves the received NDI of the last transmission. And as a reference for the next uplink data transmission, after successfully receiving the uplink data sent by the UE, the base station feeds back an ACK (Acknowledgement) to the UE, indicating that the data is successfully received, and continues to send the UE to the next time for the next time.
  • the first pass of the uplink data transmission schedules PDCCH signaling.
  • Step 101 The UE loses the first transmission scheduling PDCCH signaling sent by the base station.
  • Step 102 The base station feeds back NACK (Negative Acknowledgement) and sends a retransmission schedule. PDCCH signaling.
  • NACK Negative Acknowledgement
  • the base station After transmitting the first transmission scheduling PDCCH signaling, the base station fails to successfully detect the uplink transmission data sent by the UE, and then feeds back the NACK to the UE, and simultaneously sends the retransmission scheduling PDCCH signaling to the UE.
  • Step 103 The UE receives the retransmission scheduling PDCCH signaling sent by the base station.
  • the NACK transmitted by the base station is not read.
  • the UE Since the probability of the UE losing the PDCCH signaling is one percent, the UE does not lose the retransmission scheduling PDCCH signaling sent by the base station under normal circumstances after the UE loses the first transmission scheduling PDCCH.
  • the UE schedules the DI in the PDCCH signaling according to the retransmission to determine whether it is the first transmission or the retransmission.
  • Step 104 If the MCS in the retransmission scheduling PDCCH signaling is a normal modulation and coding mode, go to step 105. Otherwise, go to step 106.
  • the HARQ entity in the UE determines whether the MCS in the PDCCH signaling is a normal coding mode.
  • RV0 the redundancy version RV in the retransmission scheduling PDCCH signaling
  • RV1, RV2, or RV3 the redundancy version
  • the normal coding mode is determined according to the MCS in the PDCCH signaling, if the PDCCH signaling includes a specific non-empty MCS, such as a QBSK rate (Quarature Phase Shift Keying rate) Rate) 0.25, 16-QAM rate (Quadrature Amplitude Modulation Rate) 0.50 or 64-QAM rate 0.70, then confirm that the MCS in the retransmission scheduling PDCCH signaling is the normal coding mode, if PDCCH signaling If the included MCS is empty (N/A), it is confirmed that the MCS in the retransmission scheduling PDCCH signaling is an abnormal coding mode.
  • a specific non-empty MCS such as a QBSK rate (Quarature Phase Shift Keying rate) Rate) 0.25, 16-QAM rate (Quadrature Amplitude Modulation Rate) 0.50 or 64-QAM rate 0.70.
  • the UE when receiving the PDCCH signaling sent by the base station, the UE does not know whether the PDCCH signaling is the retransmission scheduling PDCCH signaling or the first transmission scheduling PDCCH signaling, so when the UE receives the PDCCH signaling sent by the base station, When the first transmission scheduling PDCCH signaling, the first transmission scheduling PDCCH signaling is also processed in the same manner as the retransmission scheduling PDCCH signaling in steps 103 and 104, that is, the UE receives the first transmission sent by the base station. After the PDCCH signaling is scheduled, whether the first transmission or the retransmission is determined according to the DI in the PDCCH signaling of the first transmission scheduling.
  • step 105 is performed; otherwise, step 106 is performed.
  • step 106 is performed.
  • Step 105 The UE performs uplink data transmission.
  • the MCS in the retransmission scheduling PDCCH signaling obtained by the UE is a normal modulation and coding mode
  • the transport block TB to be transmitted is transported to the HARQ Buffer to indicate the retransmission scheduling.
  • the HARQ process corresponding to the HARQ process ID (ID, ID) in the PDCCH signaling performs the first transmission, and sets the MCS flag to normal, and the HARQ process performs uplink data transmission.
  • Step 106 The UE stops performing uplink data transmission, and waits for the next retransmission scheduling PDCCH signaling.
  • the MCS flag is set to abnormal, no uplink data transmission is performed, and the next PDCCH signaling is continued to be received.
  • the base station After the UE sends the uplink data, if the base station receives the uplink data sent by the UE and successfully decodes, the base station sends an ACK, indicating that the current UE sends the data successfully.
  • the HARQ process of the UE first instructs the corresponding HARQ process to perform adaptive retransmission, and the HARQ process checks whether the MCS flag is normal.
  • the HARQ process performs adaptive retransmission, if the base station transmits the retransmission again.
  • the redundancy version indicated in the scheduling PDCCH signaling is RV1, RV2, or RV3
  • the normal MCS obtained in step 105 may be used to indicate that the corresponding HARQ process performs adaptive retransmission, if the base station retransmits the retransmission scheduling PDCCH signal.
  • the adaptive retransmission may be performed by using the MCS indicated in the current PDCCH signaling. If the MCS flag is abnormal, no adaptive retransmission is performed.
  • the base station if the base station does not receive the uplink data sent by the UE, or the base station fails to successfully decode the data after receiving the uplink data sent by the UE, the base station feeds back the NACK to the UE, but the base station does not resend the retransmission at this time. Scheduling PDCCH signaling. Then, the HARQ entity of the UE first instructs the corresponding HARQ process to perform non-adaptive retransmission, and the HARQ process checks whether the MCS flag is normal. When the MCS flag is normal, the retransmission can be performed in a non-adaptive manner.
  • the normal MCS obtained in step 105 can be utilized, and the redundancy version can be obtained in the order of RV0, RV2, RV3, and RV1. If the MCS is marked as abnormal, no retransmission is performed.
  • the UE determines that the MCS in the PDCCH signaling sent by the base station is normal according to the first transmission of the data in the PDCCH signaling sent by the received base station in the uplink data transmission.
  • the MCS is in the normal coding mode
  • the uplink data transmission is performed, thereby ensuring the validity of the uplink data transmission.
  • no packet loss or error is indicated to indicate the underlying data transmission.
  • Steps 201 - 202 are the same as steps 101 - 102 in the first embodiment.
  • Step 203 The UE receives the retransmission scheduling PDCCH signaling sent by the base station.
  • the NACK transmitted by the base station is not read.
  • the UE After receiving the retransmission scheduling PDCCH signaling sent by the base station, the UE performs the first transmission or the retransmission according to the NDI in the PDCCH signaling according to the retransmission, in this embodiment, due to the received PDCCH signaling.
  • the HARQ Buffer and instructs the corresponding HARQ process to perform uplink data transmission.
  • Step 204 If the MCS in the retransmission scheduling PDCCH signaling is a normal modulation and coding mode, go to step 205, otherwise go to step 206.
  • the HARQ process determines whether the MCS is in the normal coding mode in the PDCCH signaling.
  • the method for determining is the same as that in the first embodiment, and details are not described herein again.
  • Step 205 When the MCS is in the normal modulation and coding mode, the HARQ process performs the first transmission operation, and sets the MCS flag to normal to perform uplink data transmission.
  • Step 206 When the MCS is in the abnormal modulation coding mode, the UE does not perform uplink data transmission, and sets the MCS flag to abnormal.
  • the base station if the base station receives the uplink data sent by the UE and successfully decodes, the base station sends an ACK to the UE, indicating that the uplink data is successfully sent.
  • the HARQ process performs adaptive retransmission if the base station transmits the retransmission again.
  • the redundancy version indicated in the scheduling PDCCH signaling is RV1, RV2, or RV3
  • the normal MCS obtained in step 205 may be used for adaptive retransmission, if the retransmission scheduling PDCCH signaling sent by the base station is re-transmitted.
  • the redundancy version is RV0
  • the adaptive retransmission can be performed by using the MCS indicated in the current PDCCH signaling. If the MCS flag is abnormal, no adaptive retransmission is performed.
  • the base station If the base station does not receive the uplink data sent by the UE, or the base station fails to successfully decode the data after receiving the uplink data sent by the UE, the base station feeds back the NACK to the UE, but the base station does not resend the retransmission scheduling PDCCH. Signaling. Then, the HARQ entity of the UE first instructs the corresponding HARQ process to perform non-adaptive retransmission, and the HARQ process checks whether the MCS flag is normal. When the MCS flag is normal, the HARQ process performs non-adaptive retransmission.
  • the normal MCS obtained in step 205 can be utilized, and the redundancy version can be obtained in the order of RV0, RV2, RV3, and RV1. If the MCS flag is abnormal, no retransmission is performed.
  • the HARQ entity when the UE performs data transmission on the uplink, and according to the PDCCH signaling sent by the received base station, the DI is determined to be the first data transmission, the HARQ entity first transports the data block to be transmitted to the buffer area. And instructing the corresponding HARQ process to transmit.
  • the HARQ process determines that the MCS of the PDCCH signaling is in the normal coding mode, the uplink data transmission is performed, thereby ensuring the validity of the uplink data transmission, and not transmitting the uplink data when transmitting the uplink data. , does not indicate the underlying data transmission without error.
  • the following describes a third embodiment of the present invention, and relates to an uplink data transmission method, including:
  • Step 301 - Step 305 is the same as step 101 to step 105 in the first embodiment.
  • Step 306 When the MCS is in the abnormal coding mode, the HARQ process selects the MCS to perform the uplink transmission operation in the MCS list, and the selected MCS may be the previously used MCS. During the previous transmission of the uplink data, the UE may save the used MCS to the local to form a MCS list. When the received MCS code is in the abnormal coding mode, the MCS in the list may be selected for retransmission.
  • the base station After the UE sends the uplink data, if the base station receives the uplink data sent by the UE and successfully decodes, the base station feeds back an ACK, indicating that the UE sends the data successfully.
  • the UE when the UE performs data transmission on the uplink, and determines that the MCS in the PDCCH signaling sent by the base station is a normal coding mode, according to the first PDCCH in the PDCCH signaling sent by the received base station.
  • the MCS is in the normal coding mode
  • the uplink data transmission is performed, thereby ensuring the validity of the uplink data transmission.
  • the uplink data is transmitted, no packet loss or error is indicated to indicate the underlying data transmission.
  • the HARQ process can select the MCS to perform the uplink transmission operation in the MCS list, thereby further ensuring the validity of the uplink data transmission.
  • the method includes: a receiving unit 401, configured to receive, by a base station, a first retransmission scheduling PDCCH signaling;
  • the determining unit 402 is configured to determine, according to the first data in the first retransmission scheduling PDCCH signaling, that the NDI is determined to be the data first transmission, and determine whether the MCS in the first retransmission scheduling PDCCH signaling is a normal coding mode;
  • the unit 403 is configured to perform uplink data transmission when the determining unit 402 determines that the MCS is in the normal coding mode.
  • the terminal device 400 performs uplink data transmission, the first transmission scheduling PDCCH signaling sent by the base station is lost, and after receiving the retransmission scheduling PDCCH signaling further sent by the base station, according to the DI value in the signaling. If the MCS is normal, the uplink data transmission is performed when the MCS is normal.
  • the ACK is fed back to the terminal device, and the receiving unit 401 receives the ACK.
  • the transmission unit 403 may further include a handling unit 4031, configured to carry the data transmission block TB to the hybrid automatic retransmission buffer HARQ Buffer, instruct the HARQ process to perform data first transmission, and set the MCS flag to be normal.
  • a handling unit 4031 configured to carry the data transmission block TB to the hybrid automatic retransmission buffer HARQ Buffer, instruct the HARQ process to perform data first transmission, and set the MCS flag to be normal.
  • the terminal device 400 may further include a handling unit 404, and a judging unit 402 and a transmission unit
  • the 403 is connected to be used to transmit the TB to the HARQ Buffer when the determining unit 402 determines that the data is first transmitted according to the M1 in the retransmission scheduling PDCCH signaling, and instructs the HARQ process to perform the first transmission of the uplink data.
  • the transport unit 404 is transported to the TB on the HARQ Buffer for transmission.
  • the determining unit 402 is further configured to: when the redundancy version RV of the retransmission scheduling PDCCH signaling sent by the base station is RV0, confirm that the MCS is a normal coding mode; or
  • the base station When the MCS included in the retransmission scheduling PDCCH signaling is non-empty, it is confirmed that the MCS is in the normal coding mode.
  • the base station After the transmitting unit 403 performs the uplink data transmission, the base station does not successfully obtain the uplink data, and then sends a NACK to the terminal device 400, and then sends the second retransmission scheduling PDCCH signaling again.
  • the receiving unit 401 further receives the base station.
  • the transmitting unit 403 performs uplink data transmission, if the base station does not successfully obtain the uplink data, the base station 400 sends a NACK, but the second retransmission scheduling PDCCH signaling is not sent again, and the receiving unit 401 further receives the base station.
  • the transmitted NACK the transmission unit 403 performs non-adaptive retransmission when it confirms that the MCS flag is normal.
  • the first retransmission scheduling PDCCH signaling in this embodiment may also be the first transmission scheduling PDCCH signaling, that is, the processing of the first retransmission scheduling PDCCH signaling and the processing of the first retransmission scheduling PDCCH signaling. Similar.
  • the terminal device 400 when the terminal device 400 performs uplink data transmission, after receiving the PDCCH signaling sent by the base station, it determines whether the scheduling is the first data transmission according to the NDI in the signaling, and when it is the first transmission, It is determined whether the MCS in the PDCCH signaling is in the normal coding mode. When the MCS is normal, the uplink data transmission is performed to ensure the validity of the uplink data transmission.
  • the uplink data When the uplink data is transmitted, the data is not lost or incorrectly indicated. transmission. Moreover, after performing uplink data transmission, after the base station does not successfully obtain the uplink data, the base station may perform retransmission according to the signaling sent by the base station, thereby further ensuring the validity of the uplink data transmission.
  • the technical solution of the present invention which is essential or contributes to the prior art, may be embodied in the form of a software product stored in a storage medium, including a plurality of instructions for making a A computer device (which may be a personal computer, a server, or a network device, etc.) performs the methods described in various embodiments of the present invention.
  • a computer device which may be a personal computer, a server, or a network device, etc.

Description

上行链路数据传输方法、 终端装置 本申请要求于 2008年 6月 23 日提交中国专利局、 申请号为 200810067986.9、 发明名 称为 "上行链路数据传输方法、 终端装置" 的中国专利申请的优先权, 其全部内容通过引 用结合在本申请中。 技术领域
本发明涉及无线通信领域, 尤其涉及上行链路数据传输方法、 终端装置。 背景技术
在长期演进 (Long Term Evolution, LTE) 系统书中, 对于在无线空口链路上发送的每个 数据都需要进行调度, 无线空口链路分为上行链路和下行链路。
在上行链路中, 混合自动重传 (Hybrid Automatic Repeat reQuest, HARQ)采用同步传 输, 包括同步自适应传输和同步非自适应传输。 上行传输包括数据首次传输和重传, 在动 态调度中每个数据首次传输都需要 UL grant (Uplink grant, 上行授予)进行指示, 而在重传 中,如果是同歩非自适应传输,则没有 UL grant进行指示,而同步自适应传输则需要 UL grant 来重新指示重传资源。
UL grant用于指示上行链路的传输资源, 包含在物理下行链路控制 (Physical Downlink Control Channel , PDCCH ) 信令中, PDCCH 中包含分配的无线资源, 调制编码方式 (Modulation Code Scheme, MCS ), 以及冗余版本(Redundancy Version, RV)和新数据指 示 (New Data Indicator, KDI) 等 HARQ相关信息。
在现有技术中,可以用 NDI的变化来判断传输的是首次传输的数据还是重传数据, DI 为 1比特, 当 NDI发生增量变化时, 标识是首次传输, 否则, 表示重传, 例如: 当 NDI为 0时, 增加后变为 1, 当 NDI为 1时, 增加后变为 0。 如表 1所示, 在上行传输中, 5比特 的 MCS中预留 3个值 (11101、 11110和 11111 )来表示 RV1、 RV2禾 当 MCS为上 述 3个值之外的其它值时, 默认为 RV0。
表 1
Figure imgf000004_0001
用户终端(User Equipment, UE)在接收 PDCCH信令时存在百分之一的丢失概率, 如 果出现上行指示首传 PDCCH信令丢失的情况, 则 UE就得不到上行首传调度 PDCCH信令 中的 MCS, 则需要调度重传。 调度重传时有以下三种情况:
1、 当没有新的 PDCCH信令调度重传时, UE不会进行任何动作,指示调度的空口资源 被挂住, 直到基站下次调度分配此资源, 这种情况只有依靠减小丟失概率的方法来消除。
2、当 UE丢失了上行首传调度 PDCCH信令, 如果 UE接收到下一次的 PDCCH信令中 的 RV为 RV0, 则 UE可以根据本次接收到的无线资源和 MCS进行正常的上行传输。
3、当 UE丢失了上行首传调度 PDCCH信令, 如果 UE接收到下一次的 PDCCH信令中 的 RV为 RV1、 V2或 RV3, 由于之前丢失上行首传调度 PDCCH信令, 并没有得到上行首 传调度 PDCCH信令中的 MCS。 而且由于 NDI也发生了增量变化, UE会将此次传输当成 首次传输, 但是本次接收到的 PDCCH信令中没有 MCS, 此时 UE继续调度上行发送, 则 会产生丢包和错误指示物理层发送等问题。
针对上述第三种情况产生的技术缺陷, 现有技术中没有技术方案予以解决。 发明内容
本发明实施方式提供了一种上行链路数据传输方法和终端装置。
一方面, 本发明实施方式提供了一种上行链路数据传输方法, 包括: 接收基站发送的 第一物理下行链路控制 PDCCH信令;当根据所述第一 PDCCH信令中新数据指示 NDI确定 为数据首传时, 判断所述第一 PDCCH信令中调制编码方式 MCS为正常编码时, 进行上行 数据传输。
另一方面, 本发明实施方式提供了一种终端装置, 包括: 接收单元, 用于接收基站发 送的第一物理下行链路控制 PDCCH信令; 判断单元, 用于根据所述接收单元接收的第一 PDCCH信令中新数据指示 NDI确定为数据首传时, 判断所述第一 PDCCH信令中 MCS是 否为正常编码方式;传输单元,用于当所述判断单元进行判断所述 MCS为正常编码方式时, 进行上行数据传输。
根据本实施方式提供的技术方案, 当 UE在上行链路数据传输,根据接收到的基站发送 的 PDCCH信令中 DI确定为数据首传时, 判断基站发送的 PDCCH信令中的 MCS是否为 正常编码方式, 当 MCS为正常编码方式时, 则进行上行数据传输, 从而保证了上行数据传 输的有效性, 在传输上行数据时, 不丢包、 不错误指示底层进行数据传输。 附图说明
图 1所示为本发明第一实施方式一种上行链路数据传输方法的流程示意图; 图 2所示为本发明第二实施方式一种上行链路数据传输方法的流程示意图; 图 3所示为本发明第四实施方式一种终端装置的结构示意图。 具体实施方式
为了使本发明的具体技术方案、 发明目的更加清楚, 下面结合具体的实施方式和附图 作进一步说明。
参照图 1, 介绍本发明第一实施方式, 关于一种上行链路数据传输方法, 在本实施方式 中, UE在进行上一次的上行数据传输之后, UE会保存上一次传输所接收到的 NDI, 并将 其作为下一次上行数据传输的参考, 基站在成功接收到 UE发送的上行数据后, 向 UE反馈 ACK (Acknowledgement, 肯定答复) 表示数据接收成功, 并继续向 UE发送用于进行下一 次上行数据传输的首传调度 PDCCH信令。
步骤 101: UE丢失基站发送的首传调度 PDCCH信令。
UE在接收 PDCCH信令时, 存在百分之一丢失的概率, 在本实施方式中, 假设 UE没 有接收到基站发送的首传调度 PDCCH信令, 假设 UE原来保存的 NDI=0, 则该首传调度 PDCCH信令中 DI=1。 由于 UE没有接收到首传调度 PDCCH信令, 因此 UE不进行上行 数据的传输。
步骤 102: 基站反馈 NACK (Negative Acknowledgement, 否定答复), 并发送重传调度 PDCCH信令。
基站在发送了首传调度 PDCCH信令后, 未能成功检测到 UE发送的上行传输数据, 则 反馈 NACK给 UE, 同时发送重传调度 PDCCH信令给 UE。 该重传调度 PDCCH信令中 NDI=l o
步骤 103 : UE接收基站发送的重传调度 PDCCH信令。
由于 UE没有进行上行数据传输, 因此并不读取基站发送的 NACK。
由于 UE丢失 PDCCH信令的概率为百分之一,因此 UE在丢失了首传调度 PDCCH后, 在正常情况下不会再丢失基站发送的重传调度 PDCCH信令。 UE在接收到基站发送的重传 调度 PDCCH信令后,根据重传调度 PDCCH信令中的 DI以决定是首次传输还是重传,在 本实施方式中, UE接收到的 PDCCH信令中的 NDI=1, UE将保存的 NDI=0更新为 DI=1, 因此, NDI发生了增量变化, 则确认本次调度为首次传输。
步骤 104: 当重传调度 PDCCH信令中 MCS为正常的调制编码方式, 则执行步骤 105, 否则, 执行步骤 106。
UE中的 HARQ实体判断重传调度 PDCCH信令中 MCS是否为正常编码方式。 当该重 传调度 PDCCH信令中的冗余版本 RV为 RV0时,则确认该重传调度 PDCCH信令中的 MCS 是正常编码方式, 当冗余版本为 RV1、 RV2或者 RV3时, 则确认该重传调度中 MCS为异 常编码方式。或者,可以直接根据 PDCCH信令中的 MCS来进行判断是否为正常编码方式, 如果该 PDCCH信令中包含了具体的非空 MCS,如 QBSK rate ( Quadrature Phase Shift Keying rate, 正交相移键控率) 0.25、 16-QAM rate (Quadrature Amplitude Modulation rate, 正交调 幅率) 0.50或 64-QAM rate 0.70等值, 则确认重传调度 PDCCH信令中的 MCS为正常编码 方式, 如果 PDCCH信令中包含的 MCS为空 (N/A), 则确认重传调度 PDCCH信令中的 MCS为异常编码方式。
需要说明的是, UE在接收基站发送的 PDCCH信令时, UE本身并不知道该 PDCCH信 令为重传调度 PDCCH信令还是首传调度 PDCCH信令, 所以当 UE接收到的是基站发送的 首传调度 PDCCH信令时,也会对首传调度 PDCCH信令进行与在步骤 103和歩骤 104中对 重传调度 PDCCH信令的处理相同的处理, 即 UE在接收到基站发送的首传调度 PDCCH信 令后, 根据首传调度 PDCCH信令中的 DI决定是首次传输还是重传, 当确认为首次传输 时, 再判断首传调度 PDCCH信令中的 MCS是否为正常编码方式, 当为正常的调制编码方 式时, 则执行步骤 105 ; 否则, 执行步骤 106。本发明实施例中其他类似的地方与此处相同, 不再 赘述。
歩骤 105 : UE进行上行数据传输。 当 UE获取的重传调度 PDCCH信令中 MCS为正常的调制编码方式时, 把待传输的数 据传输块 TB ( Transport Block)搬运到 HARQ Buffer (混合自动重传缓存区)上, 指示重传 调度 PDCCH信令中 HARQ进程 ID ( Identity, 标识)号所对应的 HARQ进程进行首传, 并 将 MCS标记设置为正常, HARQ进程进行上行数据传输。
步骤 106 : UE停止进行上行数据传输, 等待下一次重传调度 PDCCH信令。
如果 MCS为异常编码方式时, 将 MCS标记设置为异常, 不进行上行数据传输, 继续 等待接收下一次 PDCCH信令。
当 UE发送上行数据后, 如果基站接收到 UE发送的上行数据, 并成功解码, 则基站反 馈 ACK, 表明本次 UE发送数据成功。
如果基站没有接收到 UE发送的上行数据, 或者基站在接收到 UE发送的上行数据后, 未能成功解码数据, 则基站向 UE反馈 NACK, 并重新下发重传调度 PDCCH信令, 该信令 中 DI=1。 UE在接收到 PDCCH信令后得到 NDI=1, 由于此时 UE中保存的 NDI=1, NDI 没有发生变化, 表明 UE需要进行数据重传。 UE的 HARQ实体首先指示相应的 HARQ进 程进行自适应重传, HARQ进程会检査 MCS标记是否为正常,当 MCS标记为正常时, HARQ 进程就进行自适应重传, 如果基站再次发送的重传调度 PDCCH信令中指示的冗余版本为 RV1、 RV2或 RV3时, 可以利用在步骤 105中得到的正常的 MCS, 指示相应 HARQ进程进 行自适应重传, 如果基站再次发送的重传调度 PDCCH信令中指示的冗余版本为 RV0时, 则可以利用本次 PDCCH信令中所指示的 MCS进行自适应重传。如果 MCS标记为异常时, 则不进行自适应重传。
或者, 如果基站并未接收到 UE发送的上行数据, 或者基站在接收到 UE发送的上行数 据后, 未能成功解码数据, 则基站向 UE反馈 NACK, 但此时基站并不重新下发重传调度 PDCCH信令。 则此时 UE的 HARQ实体首先指示相应的 HARQ进程进行非自适应重传, HARQ进程会检査 MCS标记是否为正常, 当 MCS标记为正常时, 可以采用非自适应方式 进行重传。在 UE以非自适应方式进行重传时, 可以利用在歩骤 105中得到的正常的 MCS, 可以按照 RV0, RV2 , RV3和 RVl的顺序获得冗余版本。 如果 MCS标记为异常时, 则不进 行重传。
根据本实施方式提供的技术方案, 当 UE在上行链路数据传输,根据接收到的基站发送 的 PDCCH信令中 DI确定为数据首传时, 判断基站发送的 PDCCH信令中的 MCS是否为 正常, 当 MCS为正常编码方式时, 则进行上行数据传输, 从而保证了上行数据传输的有效 性, 在传输上行数据时, 不丟包、 不错误指示底层进行数据传输。
参照图 2, 介绍本发明第二实施方式, 关于一种上行链路数据传输方法, 包括: 步骤 201-步骤 202和第一实施方式中步骤 101-步骤 102相同。
步骤 203: UE接收基站发送的重传调度 PDCCH信令。
由于 UE没有进行上行数据传输, 因此并不读取基站发送的 NACK。
UE在正常接收到基站发送的重传调度 PDCCH信令后, 根据重传调度 PDCCH信令中 的 NDI 以决定是首次传输还是重传, 在本实施方式中, 由于接收到的 PDCCH信令中的
NDI=1, 因此判断得到本次调度为首次传输, HARQ实体把待传输的数据传输块 TB搬运到
HARQ Buffer, 并指示相应的 HARQ进程进行上行数据传输。
步骤 204: 当重传调度 PDCCH信令中 MCS为正常的调制编码方式, 则执行步骤 205, 否则执行步骤 206。
HARQ进程判断重传调度 PDCCH信令中 MCS是否为正常编码方式, 判断的方法和第 一实施方式中相同, 在此不再赘述。
步骤 205 : 当 MCS为正常调制编码方式时, HARQ进程进行首次传输的操作, 将 MCS 标记设置为正常, 进行上行数据传输。
步骤 206: 当 MCS为异常调制编码方式时, UE不进行上行数据传输, 并将 MCS标记 设置为异常。
在本实施方式中, 如果基站接收到 UE发送的上行数据, 并成功解码, 则基站向 UE反 馈 ACK, 表明本次发送上行数据成功。
如果基站并未接收到 UE发送的上行数据, 或者基站在接收到 UE发送的上行数据后, 未能成功解码数据, 则基站向 UE反馈 NACK, 并重新下发重传调度 PDCCH信令, 该信令 中 NDI=1。UE在接收到重传调度 PDCCH信令后得到 NDI=1,由于此时 UE中保存的 NDI=1, NDI没有发生变化,表明 UE需要进行数据重传。 UE的 HARQ实体首先指示相应的 HARQ 进程进行自适应重传, HARQ进程会检査 MCS标记是否为正常, 当 MCS标记为正常时, HARQ进程就进行自适应重传,如果基站再次发送的重传调度 PDCCH信令中指示的冗余版 本为 RV1、 RV2或 RV3时, 可以利用在歩骤 205中得到的正常的 MCS进行自适应重传, 如果基站再次发送的重传调度 PDCCH信令中指示的冗余版本为 RV0时, 则可以利用本次 PDCCH信令中所指示的 MCS进行自适应重传。如果 MCS标记为异常时, 则不进行自适应 重传。
如果基站并未接收到 UE发送的上行数据, 或者基站在接收到 UE发送的上行数据后, 未能成功解码数据, 则基站向 UE反馈 NACK, 但此时基站并不重新下发重传调度 PDCCH 信令。 则此时 UE的 HARQ实体首先指示相应的 HARQ进程进行非自适应重传, HARQ进 程会检査 MCS标记是否为正常, 当 MCS标记为正常时, HARQ进程就进行非自适应重传。 在 UE以非自适应方式进行重传时, 可以利用在步骤 205中得到的正常的 MCS, 可以按照 RV0, RV2, RV3和 RV1的顺序获得冗余版本。 如果 MCS标记为异常时, 则不进行重传。
在本实施方式中, 当 UE在上行链路进行数据传输, 根据接收到的基站发送的 PDCCH 信令中 DI确定为数据首传时, 首先 HARQ实体将待传输的数据块搬运至缓存区上, 并指 示相应的 HARQ进程进行传输, 当 HARQ进程判断得到 PDCCH信令的 MCS为正常编码 方式时, 则进行上行数据传输, 从而保证了上行数据传输的有效性, 在传输上行数据时, 不丢包、 不错误指示底层进行数据传输。
下面介绍本发明第三实施方式, 关于一种上行链路数据传输方法, 包括:
步骤 301-步骤 305和第一实施方式中步骤 101至步骤 105相同。
步骤 306: 当 MCS为异常编码方式时, HARQ进程在 MCS列表中选择 MCS进行上行 传输的操作,选择的 MCS可以为以前使用的 MCS。 UE在以前进行上行数据的传输过程中, 可以将所使用的 MCS保存到本地,形成一个 MCS列表, 当接收到的 MCS编码为异常编码 方式时, 可以选择该列表中的 MCS进行重传。
UE发送上行数据后, 如果基站接收到 UE发送的上行数据, 并成功解码, 则基站反馈 ACK, 表明此次 UE发送数据成功。
在本实施方式中, 当 UE在上行链路进行数据传输, 根据接收到的基站发送的 PDCCH 信令中 DI确定为数据首传时,判断基站发送的 PDCCH信令中的 MCS是否为正常编码方 式, 当 MCS为正常编码方式时,则进行上行数据传输,从而保证了上行数据传输的有效性, 在传输上行数据时, 不丢包、 不错误指示底层进行数据传输。 并且, 当 MCS为异常编码方 式时, HARQ进程可以在 MCS列表中选择 MCS进行上行传输的操作, 从而进一步保证了 上行数据传输的有效性。
参照图 3, 介绍本发明第四实施方式, 关于一种终端装置 400, 包括: 接收单元 401, 用于接收基站发送的第一重传调度 PDCCH信令;
判断单元 402, 用于根据接收单元 401接收的第一重传调度 PDCCH信令中新数据指示 NDI确定为数据首传时, 判断第一重传调度 PDCCH信令中 MCS是否为正常编码方式; 传输单元 403,用于当判断单元 402判断 MCS为正常编码方式时,进行上行数据传输。 在本实施方式中, 终端装置 400进行上行数据传输时, 丢失了基站发送的首传调度 PDCCH信令, 当接到了基站进一步发送的重传调度 PDCCH信令后, 根据该信令中的 DI 值判断此次调度是否为数据首传, 当为首传时, 判断重传调度 PDCCH信令中的 MCS是否 为正常编码方式, 当 MCS为正常时, 则进行上行数据传输。
当基站成功接收并解码终端装置传输的上行数据后, 向终端装置反馈 ACK, 接收单元 401接收该 ACK。
优选地, 传输单元 403可以进一步包括搬运单元 4031, 搬运单元 4031用于将数据传输 块 TB搬运到混合自动重传缓存区 HARQ Buffer上, 指示 HARQ进程进行数据首传, 并设 置 MCS标记为正常。
优选地, 该终端装置 400可以进一步包括搬运单元 404, 与判断单元 402和传输单元
403相连接,用于在判断单元 402根据重传调度 PDCCH信令中 M)I确定为数据首传时,将 TB搬运到 HARQ Buffer上, 指示 HARQ进程进行上行数据首传; 传输单元 403, 具体用于 当判断单元 402判断 MCS为正常编码方式时, 将搬运单元 404搬运到 HARQ Buffer上的 TB进行传输。
优选地, 判断单元 402, 可以进一步用于当基站发送的重传调度 PDCCH信令中冗余版 本 RV为 RV0时, 确认 MCS为正常编码方式; 或者,
当该重传调度 PDCCH信令中包含的 MCS为非空时, 确认 MCS为正常编码方式。 优选地, 当传输单元 403 进行上行数据传输后, 基站没有成功获得上行数据, 则向终 端装置 400发送 NACK, 并再次下发第二重传调度 PDCCH信令, 此时, 接收单元 401进一 步接收基站发送的 NACK和第二重传调度 PDCCH信令, 该第二重传调度 PDCCH信令中 NDI和所述第一重传调度 PDCCH信令中丽相同;传输单元 403则在确认 MCS标记为正 常时, 进行自适应重传。
优选地, 当传输单元 403 进行上行数据传输后, 基站没有成功获得上行数据, 则向终 端装置 400发送 NACK, 但并没有再次下发第二重传调度 PDCCH信令, 则接收单元 401 进一步接收基站发送的 NACK, 传输单元 403在确认 MCS标记为正常时, 进行非自适应重 传。
需要说明的是,本实施例中的第一重传调度 PDCCH信令还可以为首传调度 PDCCH信 令, 即对首传调度 PDCCH信令进行处理时与对第一重传调度 PDCCH信令的处理类似。 在本实施方式中, 终端装置 400进行上行数据传输时, 当接到了基站进一歩发送的 PDCCH 信令后, 根据该信令中的 NDI判断此次调度是否为数据首传, 当为首传时, 判断 PDCCH 信令中的 MCS是否为正常编码方式, 当 MCS为正常时, 则进行上行数据传输, 保证了上 行数据传输的有效性, 在传输上行数据时, 不丢包、 不错误指示底层进行数据传输。 并且, 在进行上行数据传输, 基站没有成功获得上行数据后, 可以根据基站发送的信令, 进行重 传, 进一步保证了上行数据传输的有效性。 通过以上的实施方式的描述, 本领域的技术人员可以清楚地了解到本发明可借助软件 加必需的通用硬件平台的方式来实现, 当然也可以通过硬件, 但很多情况下前者是更佳的 实施方式。 基于这样的理解, 本发明的技术方案本质上或者说对现有技术做出贡献的部分 可以以软件产品的形式体现出来, 该计算机软件产品存储在一个存储介质中, 包括若干指 令用以使得一台计算机设备 (可以是个人计算机, 服务器, 或者网络设备等)执行本发明 各个实施方式所述的方法。
虽然通过参照本发明的某些优选实施方式, 己经对本发明进行了图示和描述, 但本领 域的普通技术人员应该明白, 可以在形式上和细节上对其作各种改变, 而不偏离本发明的 精神和范围。

Claims

权 利 要 求 书
1、 一种上行链路数据传输方法, 其特征在于, 包括:
接收基站发送的第一物理下行链路控制 PDCCH信令;
当根据所述第一 PDCCH信令中新数据指示 NDI确定为数据首传时, 判断所述第一
PDCCH信令中调制编码方式 MCS为正常编码方式时, 进行上行数据传输。
2、 根据权利要求 1所述的上行链路数据传输方法, 其特征在于, 所述进行上行数据传 输, 具体为: 将数据传输块 TB搬运到混合自动重传缓存区 HARQ Buffer上, 指示 HARQ 进程进行上行数据首传, 并设置 MCS标记为正常, 所述 HARQ进程进行上行数据传输。
3、 根据权利要求 1所述的上行链路数据传输方法, 其特征在于, 在所述判断所述第一
PDCCH信令中 MCS为正常编码方式之前, 进一步包括: 将 TB搬运到 HARQ Buffer上, 指示 HARQ进程进行上行数据首传;
所述判断所述第一 PDCCH信令中 MCS为正常编码方式时, 进行上行数据传输, 具体 包括:
所述 HARQ进程判断所述 MCS为正常编码方式时, 进行上行数据传输, 并设置 MCS 标记为正常。
4、 根据权利要求 1至 3任一所述的上行链路数据传输方法, 其特征在于, 所述判断所 述第一 PDCCH信令中 MCS为正常编码方式, 包括:
当所述第一 PDCCH信令中冗余版本 RV为 RV0时, 确认所述 MCS为正常编码方式; 或者,
当所述第一 PDCCH信令中包含的 MCS为非空时, 确认所述 MCS为正常编码方式。
5、根据权利要求 4所述的上行链路数据传输方法,其特征在于,所述方法进一步包括: 当所述 MCS为异常编码方式时, HARQ进程在 MCS表中选择 MCS进行首传操作。
6、 根据权利要求 2或 3所述的上行链路数据传输方法, 其特征在于, 所述方法进一步 包括: 接收所述基站发送的否定答复 NACK和第二 PDCCH信令, 所述 NACK和所述第二
PDCCH信令是由基站在未成功获得上行数据之后发送的,所述第二 PDCCH信令中 NDI和 所述第一 PDCCH信令中 DI相同;
当确认所述 MCS标记为正常时, 进行自适应重传。
7、 根据权利要求 2或 3所述的上行链路数据传输方法, 其特征在于, 所述方法进一步 包括: 接收所述基站发送的 NACK, 所述 NACK是由基站在未成功获得上行数据时候发送 的; 当确认所述 MCS标记为正常时, 进行非自适应重传。
8、 根据权利要求 1 所述的上行链路数据传输方法, 其特征在于, 所述根据所述第一 PDCCH信令中 NDI确定数据首传, 包括: 将自身保存的 NDI和所述第一 PDCCH信令中 的 DI进行比较, 当两个 NDI不同时, 确认为数据首传。
9、 根据权利要求 1所述的上行链路数据传输方法, 其特征在于, 所述方法还包括: 当 所述 MCS为异常编码方式时, 将停止上行数据传输, 并设置 MCS标记为异常。
10、 一种终端装置, 其特征在于, 包括:
接收单元, 用于接收基站发送的第一物理下行链路控制 PDCCH信令;
判断单元, 用于根据所述接收单元接收的第一 PDCCH信令中新数据指示 NDI确定为 数据首传时, 判断所述第一 PDCCH信令中调制编码方式 MCS是否为正常编码方式; 传输单元,用于当所述判断单元判断所述 MCS为正常编码方式时,进行上行数据传输。
11、 根据权利要求 10所述的终端装置, 其特征在于, 所述传输单元进一步包括搬运单 元, 所述搬运单元用于将数据传输块 TB搬运到混合自动重传缓存区 HARQ Buffer上, 指 示 HARQ进程进行数据首传, 并设置 MCS标记为正常。
12、 根据权利要求 10所述的终端装置, 其特征在于, 所述终端装置进一歩包括搬运单 元, 所述搬运单元用于在所述判断单元根据所述第一 PDCCH信令中新数据指示 DI确定 为数据首传时, 将 TB搬运到 HARQ Buffer上, 指示 HARQ进程进行上行数据首传;
所述传输单元, 进一步用于当所述判断单元判断所述 MCS为正常编码方式时, 对所述 搬运单元搬运到所述 HARQ Buffer上的数据块进行上行数据传输,并设置 MCS标记为正常。
13、 根据权利要求 10所述的终端装置, 其特征在于, 所述判断单元, 进一步用于当所 述第一 PDCCH信令中冗余版本 RV为 RV0时, 确认所述 MCS为正常编码方式; 或者, 当所述第一 PDCCH信令中包含的 MCS为非空时, 确认所述 MCS为正常编码方式。
14、 根据权利要求 11或 12所述的终端装置, 其特征在于, 所述接收单元, 进一歩用 于接收所述基站发送的否定答复 NACK和第二 PDCCH信令, 所述 NACK和所述第二 PDCCH信令是由基站在未成功获得上行数据之后发送的,所述第二 PDCCH信令中 NDI和 所述第一 PDCCH信令中 DI相同;
所述传输单元, 进一步用于当所述 MCS标记为正常时, 进行自适应重传。
15、 根据权利要求 11或 12所述的终端装置, 其特征在于, 所述接收单元, 进一步用 于接收所述基站发送的 NACK, 所述 NACK是由基站在未成功获得上行数据时候发送; 所述传输单元, 进一步用于当确认所述 MCS标记为正常时, 进行非自适应重传。
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