WO2016115773A1 - 数据传输方法、数据传输装置和基站 - Google Patents

数据传输方法、数据传输装置和基站 Download PDF

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Publication number
WO2016115773A1
WO2016115773A1 PCT/CN2015/075543 CN2015075543W WO2016115773A1 WO 2016115773 A1 WO2016115773 A1 WO 2016115773A1 CN 2015075543 W CN2015075543 W CN 2015075543W WO 2016115773 A1 WO2016115773 A1 WO 2016115773A1
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Prior art keywords
data transmission
terminal
cqi
mcs
mode
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PCT/CN2015/075543
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English (en)
French (fr)
Inventor
朱亚军
张云飞
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Yulong Computer Telecommunication Scientific Shenzhen Co Ltd
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Yulong Computer Telecommunication Scientific Shenzhen Co Ltd
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • 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
    • H04L1/0001Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0023Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling

Definitions

  • the present invention relates to the field of wireless communication technologies, and in particular, to a data transmission method, a data transmission device, and a base station.
  • small cells small cells
  • the link quality between the service node and the terminal is good, and the traditional modulation mode cannot meet the requirements.
  • a modulation method of 256QAM is introduced.
  • the invention is based on the above problems, and proposes a new technical solution, which can enable the terminal to accurately select the used MCS/CQI/TBS table for different modulation and coding modes, thereby smoothly implementing data transmission.
  • the present invention provides a data transmission method, including: notifying a terminal to perform data transmission by using a specific MCS mode; and, when the specific MCS mode is 256QAM, notifying the terminal to select an MCS corresponding to 256QAM.
  • (Modulation and Coding Scheme)/CQI (Channel Quality Indicator)/TBS (Transport Block Size) table for the data transmission No Then, the terminal is notified to select an original MCS/CQI/TBS table for the data transmission.
  • the MCS/CQI/TBS table to be used is also notified when the MCS mode adopted by the terminal is notified.
  • the terminal enables the terminal to use the correct MCS/CQI/TBS table to implement modulation coding of the transmitted data, avoiding the use of the wrong MCS/CQI/TBS table.
  • the process of notifying the terminal to perform the selection of the table includes: notifying the terminal to perform the data transmission by using a specific transmission mode; wherein, when the terminal is notified to adopt the specific transmission mode
  • the main transmission mode performs the data transmission, it indicates that the terminal needs to select an MCS/CQI/TBS table corresponding to 256QAM, and when the terminal is notified to use the fallback mode of the specific transmission mode to perform the data transmission.
  • the main transmission mode and the fallback mode defined by the transmission mode (TM) are used to classify the 256QAM and other original modulation and coding modes into two categories, and the main transmission mode is matched with 256QAM and 256QAM.
  • Corresponding MCS/CQI/TBS table is associated, and the fallback mode is associated with the original modulation and coding mode and the original MCS/CQI/TBS table, so that the terminal can be clearly informed that the correct MCS/CQI/TBS is used. Forms and help reduce signaling consumption.
  • the specific transmission mode includes: any transmission mode supported by the terminal; or a transmission mode exclusively used by a terminal supporting 256QAM.
  • all existing transmission modes including TM1 to TM10, can be used to notify the terminal of the corresponding table type, thereby enabling accurate notification of the form type. It is also possible to avoid changes to existing agreements.
  • a dedicated transmission mode may be defined for the 256QAM, for example, defined as TM11, so that the original protocol and the newly defined TM11 are separately managed to avoid excessive changes to TM1 to TM10.
  • the process of notifying the terminal to perform the selection of the table includes: when the specific MCS mode is 256QAM, the corresponding downlink control information is scrambled by using the first sequence, otherwise the second is adopted. The sequence scrambles the corresponding downlink control information.
  • downlink control information (DCI, Downlink Control Information) can be scrambled by using different sequences, so that the terminal can be based on The sequence used in descrambling, knowing the modulation coding method currently used and the corresponding MCS/CQI/TBS table, helps to reduce signaling consumption.
  • the process of notifying the terminal to perform the selection of the table includes: generating a message frame, where the message frame includes a form type identifier, and when the table type identifier is the first value, indicating the The terminal needs to select an MCS/CQI/TBS table corresponding to 256QAM.
  • the table type identifier is the second value, it indicates that the terminal needs to select an original MCS/CQI/TBS table; and sends the message to the terminal. frame.
  • the MCS/CQI/TBS table that needs to be used can be directly notified to the terminal through the message frame, thereby helping to avoid message mis-communication that may be caused by other means.
  • the message frame is RRC signaling or MAC signaling.
  • the message type communication of the above table type can be implemented by any form of signaling, for example, can be communicated through physical layer signaling, and the value of the physical layer signaling is made.
  • the value is the first value, it indicates that the terminal needs to select the MCS/CQI/TBS table corresponding to 256QAM, and when the value of the physical layer signaling is the second value, it indicates that the terminal needs to select the original MCS/CQI/TBS table.
  • the method further includes: when the specific MCS mode is 256QAM, expanding the number of bits of the CQI reporting information.
  • the SNR Signal to Noise Ratio
  • the CQI reporting information can also be other types, such as reporting information for the broadband CQI.
  • the CQI reporting information can also be other types, such as reporting information for the broadband CQI.
  • the extended CQI reporting information includes 3 bits.
  • the CQI reporting information of the current 2 bits can be expanded to 3 bits, thereby expanding the original 4 level offset values to 8 levels to achieve more Accurate base station scheduling.
  • the specific bit of the CQI reporting information can be adjusted as needed, for example, by expanding to a larger bit, which helps to contain more transmission information and achieve more accurate. Base station scheduling.
  • the CQI reporting information is subband CQI information.
  • the present invention also provides a data transmission apparatus, comprising: a modulation and coding mode notification unit, configured to notify the terminal to perform data transmission by using a specific MCS mode; and a table type notification unit, configured to be in the case where the specific MCS mode is 256QAM Next, the terminal is notified to select an MCS/CQI/TBS table corresponding to 256QAM for the data transmission, otherwise the terminal is notified to select an original MCS/CQI/TBS table for the data transmission.
  • a modulation and coding mode notification unit configured to notify the terminal to perform data transmission by using a specific MCS mode
  • a table type notification unit configured to be in the case where the specific MCS mode is 256QAM Next, the terminal is notified to select an MCS/CQI/TBS table corresponding to 256QAM for the data transmission, otherwise the terminal is notified to select an original MCS/CQI/TBS table for the data transmission.
  • the MCS/CQI/TBS table to be used is also notified when the MCS mode adopted by the terminal is notified.
  • the terminal enables the terminal to use the correct MCS/CQI/TBS table to implement modulation coding of the transmitted data, avoiding the use of the wrong MCS/CQI/TBS table.
  • the form type notification unit includes: a transmission mode notification sub-unit, configured to notify the terminal to perform the data transmission by using a specific transmission mode; wherein, when the terminal is notified to adopt the When the data transmission is performed by the primary transmission mode of the specific transmission mode, it is indicated that the terminal needs to select an MCS/CQI/TBS table corresponding to 256QAM, and when the terminal is notified to adopt the fallback mode of the specific transmission mode, Data transmission At the time, it indicates that the terminal needs to select an original MCS/CQI/TBS table.
  • the main transmission mode and the fallback mode defined by the transmission mode (TM) are used to classify the 256QAM and other original modulation and coding modes into two categories, and the main transmission mode is matched with 256QAM and 256QAM.
  • Corresponding MCS/CQI/TBS table is associated, and the fallback mode is associated with the original modulation and coding mode and the original MCS/CQI/TBS table, so that the terminal can be clearly informed that the correct MCS/CQI/TBS is used. Forms and help reduce signaling consumption.
  • the specific transmission mode includes: any transmission mode supported by the terminal; or a transmission mode exclusively used by a terminal supporting 256QAM.
  • all existing transmission modes including TM1 to TM10, can be used to notify the terminal of the corresponding table type, thereby enabling accurate notification of the form type. It is also possible to avoid changes to existing agreements.
  • a dedicated transmission mode may be defined for the 256QAM, for example, defined as TM11, so that the original protocol and the newly defined TM11 are separately managed to avoid excessive changes to TM1 to TM10.
  • the form type notification unit includes: a scrambling subunit, configured to perform scrambling on the corresponding downlink control information by using the first sequence in a case where the specific MCS mode is 256QAM Otherwise, the second sequence is used to scramble the corresponding downlink control information.
  • downlink control information (DCI, Downlink Control Information) can be scrambled by using different sequences, so that the terminal can be based on The sequence used in descrambling, knowing the modulation coding method currently used and the corresponding MCS/CQI/TBS table, helps to reduce signaling consumption.
  • the form type notification unit includes: a message frame generation subunit, configured to generate a message frame, where the message frame includes a table type identifier, when the table type identifier is the first value Indicates that the terminal needs to select an MCS/CQI/TBS table corresponding to 256QAM, and when the table type identifier is the second value, it indicates that the terminal needs to select an original MCS/CQI/TBS table; the message frame transmitter a unit, configured to send to the terminal The message frame.
  • the MCS/CQI/TBS table that needs to be used can be directly notified to the terminal through the message frame, thereby helping to avoid message mis-communication that may be caused by other means.
  • the message frame is RRC signaling or MAC signaling.
  • the message type communication of the above table type can be implemented by any form of signaling, for example, can be communicated through physical layer signaling, and the value of the physical layer signaling is made.
  • the value is the first value, it indicates that the terminal needs to select the MCS/CQI/TBS table corresponding to 256QAM, and when the value of the physical layer signaling is the second value, it indicates that the terminal needs to select the original MCS/CQI/TBS table.
  • the method further includes: an information extension unit, configured to expand the number of bits of the CQI report information when the specific MCS mode is 256QAM.
  • the SNR Signal to Noise Ratio
  • the CQI reporting information may also be other types, for example, reporting information for the wideband CQI, by increasing the number of bits, to more accurately indicate the reported wideband CQI information or indicating a wideband CQI value corresponding to a larger SNR range, such that Base stations can obtain more accurate CQI information and improve system performance.
  • the extended CQI reporting information includes 3 bits.
  • the CQI reporting information of the current 2 bits can be expanded to 3 bits, thereby expanding the original 4 level offset values to 8 levels to achieve more Accurate base station scheduling.
  • the specific bit of the CQI reporting information can be adjusted as needed, for example, by expanding to a larger bit, which helps to contain more transmission information and achieve more accurate. Base station scheduling.
  • the CQI reporting information is subband CQI information.
  • the present invention also provides a base station, comprising: the number according to any one of the above technical solutions According to the transmission device.
  • the terminal can accurately select the MCS/CQI/TBS table to be used for different modulation and coding modes, thereby smoothly implementing data transmission.
  • FIG. 1 shows a schematic flow chart of a data transmission method according to an embodiment of the present invention
  • FIG. 2 shows a schematic flow chart for implicitly notifying a terminal of a form type according to an embodiment of the present invention
  • FIG. 3 shows a schematic flow chart for implicitly notifying a terminal of a form type according to another embodiment of the present invention
  • FIG. 4 shows a schematic flow chart for explicitly notifying a terminal of a form type according to an embodiment of the present invention
  • Figure 5 shows a schematic block diagram of a data transmission device in accordance with one embodiment of the present invention
  • Figure 6 shows a schematic block diagram of a base station in accordance with one embodiment of the present invention.
  • FIG. 1 shows a schematic flow chart of a data transmission method in accordance with one embodiment of the present invention.
  • a data transmission method includes:
  • Step 102 notify the terminal to perform data transmission by using a specific MCS manner
  • Step 104 When the specific MCS mode is 256QAM, notify the terminal to select an MCS (Modulation and Coding Scheme)/CQI (Channel Quality Indicator)/TBS (Transport) corresponding to 256QAM. Block Size, transport block size) table for the data transmission, otherwise notify the terminal to select the original MCS/CQI/TBS table for the data transmission.
  • MCS Modulation and Coding Scheme
  • CQI Channel Quality Indicator
  • TSS Transport block size
  • the MCS/CQI/TBS table to be used is also notified when the MCS mode adopted by the terminal is notified.
  • the terminal enables the terminal to use the correct MCS/CQI/TBS table to implement modulation coding of the transmitted data, avoiding the use of the wrong MCS/CQI/TBS table.
  • Embodiment 1 Adopting an implicit method
  • FIG. 2 shows a schematic flow diagram of implicitly notifying a terminal of a form type, in accordance with one embodiment of the present invention.
  • the process of notifying the terminal to select a form includes:
  • Step 202 Notify the terminal to perform the data transmission by using a specific transmission mode.
  • Step 204 Determine whether the specific transmission mode is the main transmission mode, and if yes, proceed to step 206, otherwise proceed to step 208.
  • Step 206 If the primary transmission mode is adopted, it indicates that the terminal needs to select an MCS/CQI/TBS table corresponding to 256QAM.
  • Step 208 if the fallback mode is adopted, it indicates that the terminal needs to select an original MCS/CQI/TBS table.
  • the main transmission mode and the fallback mode defined by the transmission mode are used to classify the 256QAM and other original modulation and coding modes into two categories, and the main transmission mode is matched with 256QAM and 256QAM.
  • the corresponding MCS/CQI/TBS table is associated, and the fallback mode and the original modulation and coding mode, the original MCS/CQI/TBS table Associated so that the terminal can be clearly informed that the correct MCS/CQI/TBS table is used and helps to reduce signaling consumption.
  • the main transmission mode indicates that the corresponding data transmission supports the 256QAM modulation mode
  • the fallback mode indicates that the corresponding data transmission does not support the 256AQM modulation mode.
  • each transmission mode has a primary transmission mode and a fallback mode.
  • the definition of the above 10 transmission modes in the existing protocol can be utilized, that is, for any one or more existing transmission modes, such that in the main transmission mode, corresponding to 256QAM and the corresponding new MCS/CQI /TBS table; and in the fallback mode, corresponding to the original modulation and coding mode and the corresponding original MCS/CQI/TBS table.
  • a dedicated transmission mode may be defined for 256QAM, such as TM11. Specifically, as shown in Table 1, it is a definition of the above-described dedicated transmission mode T11 in a specific preferred embodiment.
  • the original protocol and the newly defined TM11 are separately managed to avoid excessive changes to TM1 to TM10.
  • FIG. 3 shows a schematic flow chart for implicitly notifying a terminal of a form type according to another embodiment of the present invention.
  • the process of implicitly notifying a terminal of a form type includes:
  • Step 302 Determine whether the specific MCS mode required by the terminal is 256QAM, and if yes, proceed to step 304, otherwise proceed to step 306.
  • Step 304 If the terminal is required to adopt the 256QAM mode, the first sequence is used to scramble the corresponding downlink control information.
  • Step 306 If the terminal is required to adopt the original modulation and coding mode, the second sequence is used to scramble the corresponding downlink control information.
  • downlink control information (DCI, Downlink Control Information) can be scrambled by using different sequences, so that the terminal can be based on The sequence used in descrambling, knowing the modulation coding method currently used and the corresponding MCS/CQI/TBS table, helps to reduce signaling consumption.
  • the terminal if the terminal can correctly demodulate the received DCI, the terminal understands the phase.
  • the control method should be; if the terminal cannot correctly demodulate the received DCI, the base station can know that the terminal does not correctly understand the usage of different types of tables, so that corresponding further processing can be performed.
  • Embodiment 2 Through an explicit way
  • FIG. 4 shows a schematic flow diagram of explicitly notifying a terminal of a form type, in accordance with one embodiment of the present invention.
  • the process of explicitly notifying a terminal of a form type includes:
  • Step 402 Generate a message frame, where the message frame includes a table type identifier.
  • the table type identifier is the first value, it indicates that the terminal needs to select an MCS/CQI/TBS table corresponding to 256QAM, when the table is When the type identifier is the second value, it indicates that the terminal needs to select an original MCS/CQI/TBS table;
  • Step 404 Send the message frame to the terminal.
  • the MCS/CQI/TBS table that needs to be used can be directly notified to the terminal through the message frame, thereby helping to avoid message mis-communication that may be caused by other means.
  • the message frame is RRC signaling or MAC signaling.
  • the specific implementation method for notifying by RRC signaling may be:
  • the message type communication of the above table type can be implemented by any form of signaling, for example, can be communicated through physical layer signaling, and the value of the physical layer signaling is made.
  • the value is the first value (for example, 0)
  • the value of the physical layer signaling is the second value (for example, 1)
  • the terminal needs to select The original MCS/CQI/TBS form.
  • the present invention further proposes the following technical solutions on the basis of the above-mentioned technical solutions of the respective notification form types:
  • the method further includes: when the specific MCS mode is 256QAM (or a higher-order modulation and coding mode), expanding the number of bits of the CQI reporting information.
  • the obtained sub-band CQI reports the correspondence between the information value and the offset level, which enables the original four levels (
  • the level offset value is extended to 8 levels for more accurate base station scheduling.
  • the specific bit of the CQI report information can be adjusted as needed, for example, by expanding to a larger bit or adjusting.
  • the offset level of each bit helps to contain more transmission information and achieve more accurate base station scheduling.
  • the CQI reporting information may also be other types, such as reporting information for the wideband CQI, by increasing the number of bits, thereby helping to more accurately indicate the reported wideband CQI information or indicating a wideband CQI value corresponding to a larger SNR range.
  • Base stations can obtain more accurate CQI information and improve system performance.
  • Figure 5 shows a schematic block diagram of a data transmission device in accordance with one embodiment of the present invention.
  • a data transmission apparatus 500 includes: a modulation and coding mode notification unit 502, configured to notify a terminal to perform data transmission by using a specific MCS mode; and a form type notification unit 504 for In the case that the specific MCS mode is 256QAM, the terminal is notified to select an MCS/CQI/TBS table corresponding to 256QAM for the data transmission, otherwise the terminal is notified to select the original MCS/CQI/TBS. a table for the data transfer.
  • the MCS/CQI/TBS table to be used is also notified when the MCS mode adopted by the terminal is notified.
  • the terminal enables the terminal to use the correct MCS/CQI/TBS table to implement modulation coding of the transmitted data, avoiding the use of the wrong MCS/CQI/TBS table.
  • the form type notification unit 504 includes: a transmission mode notification sub-unit 5042, configured to notify the terminal to perform the data transmission by using a specific transmission mode; wherein, when the terminal is notified to adopt When the data transmission is performed by the primary transmission mode of the specific transmission mode, it indicates that the terminal needs to select an MCS/CQI/TBS table corresponding to 256QAM, and notifies the terminal to adopt the fallback mode of the specific transmission mode. When the data transmission is performed, it indicates that the terminal needs to select an original MCS/CQI/TBS table.
  • the main transmission mode and the fallback mode defined by the transmission mode are used to classify the 256QAM and other original modulation and coding modes into two classes.
  • the main transmission mode is associated with the MCS/CQI/TBS table corresponding to 256QAM and 256QAM
  • the fallback mode is associated with the original modulation and coding mode and the original MCS/CQI/TBS table, so that it can be clear
  • the terminal informs the terminal to adopt the correct MCS/CQI/TBS table and helps to reduce signaling consumption.
  • the specific transmission mode includes: any transmission mode supported by the terminal; or a transmission mode exclusively used by a terminal supporting 256QAM.
  • all existing transmission modes including TM1 to TM10, can be used to notify the terminal of the corresponding table type, thereby enabling accurate notification of the form type. It is also possible to avoid changes to existing agreements.
  • a dedicated transmission mode may be defined for the 256QAM, for example, defined as TM11, so that the original protocol and the newly defined TM11 are separately managed to avoid excessive changes to TM1 to TM10.
  • the form type notification unit 504 includes: a scrambling sub-unit 5044, configured to perform corresponding downlink control information by using the first sequence in a case where the specific MCS mode is 256QAM Scrambling, otherwise the second sequence is used to scramble the corresponding downlink control information.
  • downlink control information (DCI, Downlink Control Information) can be scrambled by using different sequences, so that the terminal can be based on The sequence used in descrambling, knowing the modulation coding method currently used and the corresponding MCS/CQI/TBS table, helps to reduce signaling consumption.
  • the form type notification unit 504 includes: a message frame generation subunit 5046, configured to generate a message frame, where the message frame includes a form type identifier, when the form type identifier is the first The value indicates that the terminal needs to select an MCS/CQI/TBS table corresponding to 256QAM, and when the table type identifier is the second value, it indicates that the terminal needs to select an original MCS/CQI/TBS table;
  • the sending subunit 5048 is configured to send the message frame to the terminal.
  • the MCS/CQI/TBS table that needs to be used can be directly notified to the terminal through the message frame, thereby helping to avoid message mis-communication that may be caused by other means.
  • the message frame is RRC signaling or MAC signaling.
  • the message type communication of the above table type can be implemented by any form of signaling, for example, can be communicated through physical layer signaling, and the value of the physical layer signaling is made.
  • the value is the first value, it indicates that the terminal needs to select the MCS/CQI/TBS table corresponding to 256QAM, and when the value of the physical layer signaling is the second value, it indicates that the terminal needs to select the original MCS/CQI/TBS table.
  • the information expansion unit 506 is configured to expand the number of bits of the CQI reporting information when the specific MCS mode is 256QAM.
  • the SNR Signal to Noise Ratio
  • the CQI reporting information may also be other types, for example, reporting information for the wideband CQI, by increasing the number of bits, to more accurately indicate the reported wideband CQI information or indicating a wideband CQI value corresponding to a larger SNR range, such that Base stations can obtain more accurate CQI information and improve system performance.
  • the extended CQI reporting information includes 3 bits.
  • the CQI reporting information of the current 2 bits can be expanded to 3 bits, thereby expanding the original 4 level offset values to 8 levels to achieve more Accurate base station scheduling.
  • the specific bit of the CQI reporting information can be adjusted as needed, for example, by expanding to a larger bit, which helps to contain more transmission information and achieve more accurate. Base station scheduling.
  • the CQI reporting information is subband CQI information.
  • Figure 6 shows a schematic block diagram of a base station in accordance with one embodiment of the present invention.
  • a base station 600 includes a data transmission device 500 as shown in FIG.
  • the technical solution of the present invention is described in detail above with reference to the accompanying drawings, and the present invention proposes a data
  • the transmission method, a data transmission device and a base station can enable the terminal to accurately select the used MCS/CQI/TBS table for different modulation and coding modes, thereby smoothly implementing data transmission.

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  • Computer Networks & Wireless Communication (AREA)
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Abstract

本发明提供了一种数据传输方法,包括:通知终端采用特定的MCS方式进行数据传输;其中,当所述特定的MCS方式为256QAM时,通知所述终端选择对应于256QAM的MCS/CQI/TBS表格,以用于所述数据传输,否则通知所述终端选择原有的MCS/CQI/TBS表格,以用于所述数据传输。本发明还提出了一种数据传输装置和一种基站。通过本发明的技术方案,可以针对不同的调制编码方式,使终端准确选择使用的MCS/CQI/TBS表格,从而顺利实现数据传输。

Description

数据传输方法、数据传输装置和基站
本申请要求于2015年1月20日提交中国专利局、申请号为201510030231.1,发明名称为“数据传输方法、数据传输装置和基站”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技术领域,具体而言,涉及一种数据传输方法、一种数据传输装置和一种基站。
背景技术
在LTE-A系统的标准化进程中引入了对于small cell(小小区)的讨论。由于small cell的典型部署场景是室内或是短距离的覆盖,服务节点与终端之间的链路质量较好,传统的调制方式已经不能够满足要求。为了进一步的提高频谱效率,引入了256QAM的调制方式。
然而,引入256QAM会对当前的协议产生一定的影响。比如目前已经确定了需要引入新的MCS/CQI/TBS表格来指示256QAM,使得同时存在对应于256QAM的新表格和对应于原有调制编码方式的旧表格。
因此,如何通知终端使用目前协议中已有的或是新引入的表格,成为目前亟待解决的技术问题。
发明内容
本发明正是基于上述问题,提出了一种新的技术方案,可以针对不同的调制编码方式,使终端准确选择使用的MCS/CQI/TBS表格,从而顺利实现数据传输。
有鉴于此,本发明提出了一种数据传输方法,包括:通知终端采用特定的MCS方式进行数据传输;以及,当所述特定的MCS方式为256QAM时,通知所述终端选择对应于256QAM的MCS(Modulation and Coding Scheme,调制编码方式)/CQI(Channel Quality Indicator,链路质量指示)/TBS(Transport Block Size,传输块大小)表格,以用于所述数据传输,否 则通知所述终端选择原有的MCS/CQI/TBS表格,以用于所述数据传输。
在该技术方案中,由于256QAM与原有的其他调制编码方式分别对应于不同的MCS/CQI/TBS表格,因而通过在通知终端采用的MCS方式时,还将使用的MCS/CQI/TBS表格告知终端,使得终端能够使用正确的MCS/CQI/TBS表格来实现对传输数据的调制编码,避免使用错误的MCS/CQI/TBS表格。
当然,本领域技术人员应该理解的是,对于日后可能出现的任意调制编码方式,若需要定义新的MCS/CQI/TBS表格,则均可以通过上述方式实现向终端的准确告知,以避免使用错误的MCS/CQI/TBS表格。
在上述技术方案中,优选地,通知所述终端进行表格的选择的过程包括:通知所述终端采用特定的传输模式进行所述数据传输;其中,当通知所述终端采用所述特定的传输模式的主传输模式进行所述数据传输时,表明所述终端需要选择对应于256QAM的MCS/CQI/TBS表格,当通知所述终端采用所述特定的传输模式的回退模式进行所述数据传输时,表明所述终端需要选择原有的MCS/CQI/TBS表格。
在该技术方案中,利用传输模式(TM,Transmission Mode)定义的主传输模式和回退模式,将256QAM与原有的其他调制编码方式分为两个类别,并将主传输模式与256QAM、256QAM对应的MCS/CQI/TBS表格相关联,以及将回退模式与原有的调制编码方式、原有的MCS/CQI/TBS表格相关联,从而能够清楚地通知终端采用正确的MCS/CQI/TBS表格,并且有助于减少信令消耗。
在上述技术方案中,优选地,所述特定的传输模式包括:所述终端支持的任一传输模式;或仅由支持256QAM的终端专用的传输模式。
在该技术方案中,作为一种较为优选的实施方式,现有的所有传输模式,包括TM1~TM10,均可以用于向终端通知相应的表格类型,从而既能够实现对表格类型的准确告知,又能够避免对现有协议的改动。
作为另一种较为优选的实施方式,可以为256QAM定义专用的传输模式,比如定义为TM11,使得对原有协议和新定义的TM11进行分别管理,避免对TM1~TM10造成过多改动。
在上述技术方案中,优选地,通知所述终端进行表格的选择的过程包括:当所述特定的MCS方式为256QAM时,采用第一序列对相应的下行控制信息进行加扰,否则采用第二序列对相应的下行控制信息进行加扰。
在该技术方案中,当采用不同的调制编码方式时,即256QAM或原有的调制编码方式,可以采用相应的不同序列对下行控制信息(DCI,Downlink Control Information)进行加扰,使得终端能够根据解扰时使用的序列,了解到当前采用的调制编码方式以及相应的MCS/CQI/TBS表格,有助于减少信令消耗。
在上述技术方案中,优选地,通知所述终端进行表格的选择的过程包括:生成消息帧,所述消息帧中包含表格类型标识,当所述表格类型标识为第一值时,表示所述终端需要选择对应于256QAM的MCS/CQI/TBS表格,当所述表格类型标识为第二值时,表示所述终端需要选择原有的MCS/CQI/TBS表格;向所述终端发送所述消息帧。
在该技术方案中,可以通过消息帧,直接向终端告知其所需要采用的MCS/CQI/TBS表格,从而有助于避免其他方式可能导致的消息误传达。
在上述技术方案中,优选地,所述消息帧为RRC信令或MAC信令。当然,本领域技术人员应该理解的是,显然可以通过任意形式的信令,均可以实现上述的表格类型的消息传达,比如可以通过物理层信令进行传达,并使得该物理层信令的数值为第一值时,表明终端需要选择对应于256QAM的MCS/CQI/TBS表格,以及当该物理层信令的数值为第二值时,表明终端需要选择原有的MCS/CQI/TBS表格。
在上述技术方案中,优选地,还包括:当所述特定的MCS方式为256QAM时,扩展CQI上报信息的比特位数量。
在该技术方案中,当CQI上报信息为子带CQI上报信息时,由于采用256QAM或更高阶的调制编码方式时,SNR(信噪比)间隔可能被拉大,从而使得原有的子带CQI上报信息中包含的offset值(偏移量)的精度不够,因而通过增加比特位数量,有助于提供更多的offset值,从而提高offset值的精度,使得基站能够实现更为准确的调度,提升系统性能。
当然,CQI上报信息也可以为其他类型,比如为宽带CQI上报信息, 则通过增加比特位数量,有助于更加精确地指示上报的宽带CQI信息或者指示对应更大SNR范围的宽带CQI值,这样基站可以获得更加精准的CQI信息,提升系统性能。
在上述技术方案中,优选地,扩展后的所述CQI上报信息包含3个比特位。
在该技术方案中,较为具体地,可以将目前的2个比特位的CQI上报信息扩展为3个比特位,从而将原本4个等级(level)的offset值扩展至8个等级,以实现更精准的基站调度。当然,本领域技术人员应该理解的是,对于CQI上报信息的具体比特位,可以根据需要进行调整,比如通过扩展至更大比特位,有助于包含更多的传输信息,并实现更为准确的基站调度。
在上述技术方案中,优选地,所述CQI上报信息为子带CQI信息。
本发明还提出了一种数据传输装置,包括:调制编码方式通知单元,用于通知终端采用特定的MCS方式进行数据传输;表格类型通知单元,用于在所述特定的MCS方式为256QAM的情况下,通知所述终端选择对应于256QAM的MCS/CQI/TBS表格,以用于所述数据传输,否则通知所述终端选择原有的MCS/CQI/TBS表格,以用于所述数据传输。
在该技术方案中,由于256QAM与原有的其他调制编码方式分别对应于不同的MCS/CQI/TBS表格,因而通过在通知终端采用的MCS方式时,还将使用的MCS/CQI/TBS表格告知终端,使得终端能够使用正确的MCS/CQI/TBS表格来实现对传输数据的调制编码,避免使用错误的MCS/CQI/TBS表格。
当然,本领域技术人员应该理解的是,对于日后可能出现的任意调制编码方式,若需要定义新的MCS/CQI/TBS表格,则均可以通过上述方式实现向终端的准确告知,以避免使用错误的MCS/CQI/TBS表格。
在上述技术方案中,优选地,所述表格类型通知单元包括:传输模式通知子单元,用于通知所述终端采用特定的传输模式进行所述数据传输;其中,当通知所述终端采用所述特定的传输模式的主传输模式进行所述数据传输时,表明所述终端需要选择对应于256QAM的MCS/CQI/TBS表格,当通知所述终端采用所述特定的传输模式的回退模式进行所述数据传输 时,表明所述终端需要选择原有的MCS/CQI/TBS表格。
在该技术方案中,利用传输模式(TM,Transmission Mode)定义的主传输模式和回退模式,将256QAM与原有的其他调制编码方式分为两个类别,并将主传输模式与256QAM、256QAM对应的MCS/CQI/TBS表格相关联,以及将回退模式与原有的调制编码方式、原有的MCS/CQI/TBS表格相关联,从而能够清楚地通知终端采用正确的MCS/CQI/TBS表格,并且有助于减少信令消耗。
在上述技术方案中,优选地,所述特定的传输模式包括:所述终端支持的任一传输模式;或仅由支持256QAM的终端专用的传输模式。
在该技术方案中,作为一种较为优选的实施方式,现有的所有传输模式,包括TM1~TM10,均可以用于向终端通知相应的表格类型,从而既能够实现对表格类型的准确告知,又能够避免对现有协议的改动。
作为另一种较为优选的实施方式,可以为256QAM定义专用的传输模式,比如定义为TM11,使得对原有协议和新定义的TM11进行分别管理,避免对TM1~TM10造成过多改动。
在上述技术方案中,优选地,所述表格类型通知单元包括:加扰子单元,用于在所述特定的MCS方式为256QAM的情况下,采用第一序列对相应的下行控制信息进行加扰,否则采用第二序列对相应的下行控制信息进行加扰。
在该技术方案中,当采用不同的调制编码方式时,即256QAM或原有的调制编码方式,可以采用相应的不同序列对下行控制信息(DCI,Downlink Control Information)进行加扰,使得终端能够根据解扰时使用的序列,了解到当前采用的调制编码方式以及相应的MCS/CQI/TBS表格,有助于减少信令消耗。
在上述技术方案中,优选地,所述表格类型通知单元包括:消息帧生成子单元,用于生成消息帧,所述消息帧中包含表格类型标识,当所述表格类型标识为第一值时,表示所述终端需要选择对应于256QAM的MCS/CQI/TBS表格,当所述表格类型标识为第二值时,表示所述终端需要选择原有的MCS/CQI/TBS表格;消息帧发送子单元,用于向所述终端发送 所述消息帧。
在该技术方案中,可以通过消息帧,直接向终端告知其所需要采用的MCS/CQI/TBS表格,从而有助于避免其他方式可能导致的消息误传达。
在上述技术方案中,优选地,所述消息帧为RRC信令或MAC信令。当然,本领域技术人员应该理解的是,显然可以通过任意形式的信令,均可以实现上述的表格类型的消息传达,比如可以通过物理层信令进行传达,并使得该物理层信令的数值为第一值时,表明终端需要选择对应于256QAM的MCS/CQI/TBS表格,以及当该物理层信令的数值为第二值时,表明终端需要选择原有的MCS/CQI/TBS表格。
在上述技术方案中,优选地,还包括:信息扩展单元,用于当所述特定的MCS方式为256QAM时,扩展CQI上报信息的比特位数量。
在该技术方案中,当CQI上报信息为子带CQI上报信息时,由于采用256QAM或更高阶的调制编码方式时,SNR(信噪比)间隔可能被拉大,从而使得原有的子带CQI上报信息中包含的offset值(偏移量)的精度不够,因而通过增加比特位数量,有助于提供更多的offset值,从而提高offset值的精度,使得基站能够实现更为准确的调度,提升系统性能。
当然,CQI上报信息也可以为其他类型,比如为宽带CQI上报信息,则通过增加比特位数量,有助于更加精确地指示上报的宽带CQI信息或者指示对应更大SNR范围的宽带CQI值,这样基站可以获得更加精准的CQI信息,提升系统性能。
在上述技术方案中,优选地,扩展后的所述CQI上报信息包含3个比特位。
在该技术方案中,较为具体地,可以将目前的2个比特位的CQI上报信息扩展为3个比特位,从而将原本4个等级(level)的offset值扩展至8个等级,以实现更精准的基站调度。当然,本领域技术人员应该理解的是,对于CQI上报信息的具体比特位,可以根据需要进行调整,比如通过扩展至更大比特位,有助于包含更多的传输信息,并实现更为准确的基站调度。
在上述技术方案中,优选地,所述CQI上报信息为子带CQI信息。
本发明还提出了一种基站,包括:如上述技术方案中任一项所述的数 据传输装置。
通过以上技术方案,可以针对不同的调制编码方式,使终端准确选择使用的MCS/CQI/TBS表格,从而顺利实现数据传输。
附图说明
图1示出了根据本发明的一个实施例的数据传输方法的示意流程图;
图2示出了根据本发明的一个实施例的隐式地向终端通知表格类型的示意流程图;
图3示出了根据本发明的另一个实施例的隐式地向终端通知表格类型的示意流程图;
图4示出了根据本发明的一个实施例的显式地向终端通知表格类型的示意流程图;
图5示出了根据本发明的一个实施例的数据传输装置的示意框图;
图6示出了根据本发明的一个实施例的基站的示意框图。
具体实施方式
为了能够更清楚地理解本发明的上述目的、特征和优点,下面结合附图和具体实施方式对本发明进行进一步的详细描述。需要说明的是,在不冲突的情况下,本申请的实施例及实施例中的特征可以相互组合。
在下面的描述中阐述了很多具体细节以便于充分理解本发明,但是,本发明还可以采用其他不同于在此描述的其他方式来实施,因此,本发明的保护范围并不受下面公开的具体实施例的限制。
图1示出了根据本发明的一个实施例的数据传输方法的示意流程图。
如图1所示,根据本发明的一个实施例的数据传输方法,包括:
步骤102,通知终端采用特定的MCS方式进行数据传输;
步骤104,当所述特定的MCS方式为256QAM时,通知所述终端选择对应于256QAM的MCS(Modulation and Coding Scheme,调制编码方式)/CQI(Channel Quality Indicator,链路质量指示)/TBS(Transport Block Size,传输块大小)表格,以用于所述数据传输,否则通知所述终端选择原有的 MCS/CQI/TBS表格,以用于所述数据传输。
在该技术方案中,由于256QAM与原有的其他调制编码方式分别对应于不同的MCS/CQI/TBS表格,因而通过在通知终端采用的MCS方式时,还将使用的MCS/CQI/TBS表格告知终端,使得终端能够使用正确的MCS/CQI/TBS表格来实现对传输数据的调制编码,避免使用错误的MCS/CQI/TBS表格。
当然,本领域技术人员应该理解的是,对于日后可能出现的任意调制编码方式,若需要定义新的MCS/CQI/TBS表格,则均可以通过上述方式实现向终端的准确告知,以避免使用错误的MCS/CQI/TBS表格。
对于具体的向终端告知采用何种MCS/CQI/TBS表格,实际上存在很多种实现方式,下面以其中几种较为典型的技术手段为例,对其具体技术方案进行详细描述。
实施例一:通过隐式的方法
实施方式一
图2示出了根据本发明的一个实施例的隐式地向终端通知表格类型的示意流程图。
如图2所示,根据本发明的一个实施例的隐式地向终端通知表格类型的方法中,通知所述终端进行表格的选择的过程包括:
步骤202,通知所述终端采用特定的传输模式进行所述数据传输。
步骤204,判断上述特定的传输模式中,具体是否为采用主传输模式,若是,则进入步骤206,否则进入步骤208。
步骤206,若采用主传输模式,则表明所述终端需要选择对应于256QAM的MCS/CQI/TBS表格。
步骤208,若采用回退模式,则表明所述终端需要选择原有的MCS/CQI/TBS表格。
在该技术方案中,利用传输模式(TM,Transmission Mode)定义的主传输模式和回退模式,将256QAM与原有的其他调制编码方式分为两个类别,并将主传输模式与256QAM、256QAM对应的MCS/CQI/TBS表格相关联,以及将回退模式与原有的调制编码方式、原有的MCS/CQI/TBS表格 相关联,从而能够清楚地通知终端采用正确的MCS/CQI/TBS表格,并且有助于减少信令消耗。其中,主传输模式表示相应的数据传输支持256QAM调制方式,回退模式表示相应的数据传输不支持256AQM调制方式。
具体地,基于上述传输模式的方式,还可以具体分为两种情况:
1、基于已有传输模式
在相关技术中,已经定义了10种传输模式,记为TM1~TM10。在上述的传输模式中,每种传输模式都具有主传输模式和回退模式。
因此,可以利用现有协议中对于上述10种传输模式的定义,即针对任意一种或多种现有的传输模式,使其:在主传输模式下,对应于256QAM以及相应的新MCS/CQI/TBS表格;以及在回退模式下,对应于原有的调制编码方式以及相应的原有MCS/CQI/TBS表格。
通过对原有传输模式的定义,使得既能够实现对表格类型的准确告知,又能够避免对现有协议的改动。
2、基于专用传输模式
作为另一种具体实施方式,可以为256QAM定义专用的传输模式,比如定义为TM11。具体地,如表1所示,是一种具体的优选实施方式下,对于上述的专用传输模式T11的定义。
Figure PCTCN2015075543-appb-000001
Figure PCTCN2015075543-appb-000002
表1
通过定义256QAM专用的传输模式,使得对原有协议和新定义的TM11进行分别管理,避免对TM1~TM10造成过多改动。
实施方式二
图3示出了根据本发明的另一个实施例的隐式地向终端通知表格类型的示意流程图。
如图3所示,根据本发明的另一个实施例的隐式地向终端通知表格类型的过程包括:
步骤302,判断需要终端采用的特定的MCS方式是否为256QAM,若是,则进入步骤304,否则进入步骤306。
步骤304,若需要终端采用256QAM方式,则采用第一序列对相应的下行控制信息进行加扰。
步骤306,若需要终端采用原有的调制编码方式,则采用第二序列对相应的下行控制信息进行加扰。
在该技术方案中,当采用不同的调制编码方式时,即256QAM或原有的调制编码方式,可以采用相应的不同序列对下行控制信息(DCI,Downlink Control Information)进行加扰,使得终端能够根据解扰时使用的序列,了解到当前采用的调制编码方式以及相应的MCS/CQI/TBS表格,有助于减少信令消耗。
当然,本领域技术人员应该理解的是,对于以后可能出现的其他更高阶的调制编码方式,显然也可以通过采用相应的序列,以区分于其他调制编码方式及其对应的MCS/CQI/TBS表格。
需要指出的是:通过加扰的方式来向终端告知所采用的MCS/CQI/TBS表格时,由于终端必须准确了解不同类型的MCS/CQI/TBS表格所对应的加扰序列,因而对于基站而言,其过程具有更高的可控性。
具体地,如果终端能够正确解调出接收到的DCI,说明终端了解了相 应的控制方式;而如果终端无法正确解调出接收到的DCI,基站能够了解到该终端并没有正确理解对于不同类型的表格的使用情况,从而能够执行相应的进一步处理。
实施例二:通过显式的方式
图4示出了根据本发明的一个实施例的显式地向终端通知表格类型的示意流程图。
如图4所示,根据本发明的一个实施例的显式地向终端通知表格类型的过程包括:
步骤402,生成消息帧,所述消息帧中包含表格类型标识,当所述表格类型标识为第一值时,表示所述终端需要选择对应于256QAM的MCS/CQI/TBS表格,当所述表格类型标识为第二值时,表示所述终端需要选择原有的MCS/CQI/TBS表格;
步骤404,向所述终端发送所述消息帧。
在该技术方案中,可以通过消息帧,直接向终端告知其所需要采用的MCS/CQI/TBS表格,从而有助于避免其他方式可能导致的消息误传达。
在上述技术方案中,优选地,所述消息帧为RRC信令或MAC信令。
比如以RRC信令为例,为了区分256QAM与原有调制编码方式所采用的MCS/CQI/TBS表格,则通过RRC信令进行通知的具体实施方法可以为:
Figure PCTCN2015075543-appb-000003
因此,当上述RRC信令中的数值对应于“normal”时,表明相应的MCS/CQI/TBS表格为对应于原有的调制编码方式,而当数值对应于“extended”时,表明相应的MCS/CQI/TBS表格对应于256QAM,从而能 够准确告知终端所需要采用的MCS/CQI/TBS表格。
当然,本领域技术人员应该理解的是,显然可以通过任意形式的信令,均可以实现上述的表格类型的消息传达,比如可以通过物理层信令进行传达,并使得该物理层信令的数值为第一值(比如为0)时,表明终端需要选择对应于256QAM的MCS/CQI/TBS表格,以及当该物理层信令的数值为第二值(比如为1)时,表明终端需要选择原有的MCS/CQI/TBS表格。
此外,由于引入256QAM或更高阶的调制编码方式,使得SNR(信噪比)间隔可能被拉大,从而使得原有的子带CQI上报信息中包含的offset值(偏移量)的精度不够。为了解决上述问题,本发明在上述的各个通知表格类型的技术方案的基础上,还进一步提出了下述技术方案:
在上述任一技术方案中,优选地,还包括:当所述特定的MCS方式为256QAM(或更高阶的调制编码方式)时,扩展CQI上报信息的比特位数量。
在该技术方案中,通过增加比特位数量,有助于提供更多的offset值,从而提高offset值的精度,使得基站能够实现更为准确的调度,提升系统性能。
Figure PCTCN2015075543-appb-000004
表2
如表2所示,为采用256QAM进行调制编码时,假定将比特位扩展至3位后,得到的子带CQI上报信息值与偏移等级之间的对应关系,其能够使得原本4个等级(level)的offset值扩展至8个等级,以实现更精准的基站调度。当然,本领域技术人员应该理解的是,对于CQI上报信息的具体比特位,可以根据需要进行调整,比如通过扩展至更大比特位或是调整 每个比特位对定的偏移等级,有助于包含更多的传输信息,并实现更为准确的基站调度。
此外,CQI上报信息也可以为其他类型,比如为宽带CQI上报信息,则通过增加比特位数量,有助于更加精确地指示上报的宽带CQI信息或者指示对应更大SNR范围的宽带CQI值,这样基站可以获得更加精准的CQI信息,提升系统性能。
图5示出了根据本发明的一个实施例的数据传输装置的示意框图。
如图5所示,根据本发明的一个实施例的数据传输装置500,包括:调制编码方式通知单元502,用于通知终端采用特定的MCS方式进行数据传输;表格类型通知单元504,用于在所述特定的MCS方式为256QAM的情况下,通知所述终端选择对应于256QAM的MCS/CQI/TBS表格,以用于所述数据传输,否则通知所述终端选择原有的MCS/CQI/TBS表格,以用于所述数据传输。
在该技术方案中,由于256QAM与原有的其他调制编码方式分别对应于不同的MCS/CQI/TBS表格,因而通过在通知终端采用的MCS方式时,还将使用的MCS/CQI/TBS表格告知终端,使得终端能够使用正确的MCS/CQI/TBS表格来实现对传输数据的调制编码,避免使用错误的MCS/CQI/TBS表格。
当然,本领域技术人员应该理解的是,对于日后可能出现的任意调制编码方式,若需要定义新的MCS/CQI/TBS表格,则均可以通过上述方式实现向终端的准确告知,以避免使用错误的MCS/CQI/TBS表格。
在上述技术方案中,优选地,所述表格类型通知单元504包括:传输模式通知子单元5042,用于通知所述终端采用特定的传输模式进行所述数据传输;其中,当通知所述终端采用所述特定的传输模式的主传输模式进行所述数据传输时,表明所述终端需要选择对应于256QAM的MCS/CQI/TBS表格,当通知所述终端采用所述特定的传输模式的回退模式进行所述数据传输时,表明所述终端需要选择原有的MCS/CQI/TBS表格。
在该技术方案中,利用传输模式(TM,Transmission Mode)定义的主传输模式和回退模式,将256QAM与原有的其他调制编码方式分为两个类 别,并将主传输模式与256QAM、256QAM对应的MCS/CQI/TBS表格相关联,以及将回退模式与原有的调制编码方式、原有的MCS/CQI/TBS表格相关联,从而能够清楚地通知终端采用正确的MCS/CQI/TBS表格,并且有助于减少信令消耗。
在上述技术方案中,优选地,所述特定的传输模式包括:所述终端支持的任一传输模式;或仅由支持256QAM的终端专用的传输模式。
在该技术方案中,作为一种较为优选的实施方式,现有的所有传输模式,包括TM1~TM10,均可以用于向终端通知相应的表格类型,从而既能够实现对表格类型的准确告知,又能够避免对现有协议的改动。
作为另一种较为优选的实施方式,可以为256QAM定义专用的传输模式,比如定义为TM11,使得对原有协议和新定义的TM11进行分别管理,避免对TM1~TM10造成过多改动。
在上述技术方案中,优选地,所述表格类型通知单元504包括:加扰子单元5044,用于在所述特定的MCS方式为256QAM的情况下,采用第一序列对相应的下行控制信息进行加扰,否则采用第二序列对相应的下行控制信息进行加扰。
在该技术方案中,当采用不同的调制编码方式时,即256QAM或原有的调制编码方式,可以采用相应的不同序列对下行控制信息(DCI,Downlink Control Information)进行加扰,使得终端能够根据解扰时使用的序列,了解到当前采用的调制编码方式以及相应的MCS/CQI/TBS表格,有助于减少信令消耗。
在上述技术方案中,优选地,所述表格类型通知单元504包括:消息帧生成子单元5046,用于生成消息帧,所述消息帧中包含表格类型标识,当所述表格类型标识为第一值时,表示所述终端需要选择对应于256QAM的MCS/CQI/TBS表格,当所述表格类型标识为第二值时,表示所述终端需要选择原有的MCS/CQI/TBS表格;消息帧发送子单元5048,用于向所述终端发送所述消息帧。
在该技术方案中,可以通过消息帧,直接向终端告知其所需要采用的MCS/CQI/TBS表格,从而有助于避免其他方式可能导致的消息误传达。
在上述技术方案中,优选地,所述消息帧为RRC信令或MAC信令。当然,本领域技术人员应该理解的是,显然可以通过任意形式的信令,均可以实现上述的表格类型的消息传达,比如可以通过物理层信令进行传达,并使得该物理层信令的数值为第一值时,表明终端需要选择对应于256QAM的MCS/CQI/TBS表格,以及当该物理层信令的数值为第二值时,表明终端需要选择原有的MCS/CQI/TBS表格。
在上述技术方案中,优选地,还包括:信息扩展单元506,用于当所述特定的MCS方式为256QAM时,扩展CQI上报信息的比特位数量。
在该技术方案中,当CQI上报信息为子带CQI上报信息时,由于采用256QAM或更高阶的调制编码方式时,SNR(信噪比)间隔可能被拉大,从而使得原有的子带CQI上报信息中包含的offset值(偏移量)的精度不够,因而通过增加比特位数量,有助于提供更多的offset值,从而提高offset值的精度,使得基站能够实现更为准确的调度,提升系统性能。
当然,CQI上报信息也可以为其他类型,比如为宽带CQI上报信息,则通过增加比特位数量,有助于更加精确地指示上报的宽带CQI信息或者指示对应更大SNR范围的宽带CQI值,这样基站可以获得更加精准的CQI信息,提升系统性能。
在上述技术方案中,优选地,扩展后的所述CQI上报信息包含3个比特位。
在该技术方案中,较为具体地,可以将目前的2个比特位的CQI上报信息扩展为3个比特位,从而将原本4个等级(level)的offset值扩展至8个等级,以实现更精准的基站调度。当然,本领域技术人员应该理解的是,对于CQI上报信息的具体比特位,可以根据需要进行调整,比如通过扩展至更大比特位,有助于包含更多的传输信息,并实现更为准确的基站调度。
在上述技术方案中,优选地,所述CQI上报信息为子带CQI信息。
图6示出了根据本发明的一个实施例的基站的示意框图。
如图6所示,根据本发明的一个实施例的基站600,包括如图5所示的数据传输装置500。
以上结合附图详细说明了本发明的技术方案,本发明提出了一种数据 传输方法、一种数据传输装置和一种基站,可以针对不同的调制编码方式,使终端准确选择使用的MCS/CQI/TBS表格,从而顺利实现数据传输。
以上所述仅为本发明的优选实施例而已,并不用于限制本发明,对于本领域的技术人员来说,本发明可以有各种更改和变化。凡在本发明的精神和原则之内,所作的任何修改、等同替换、改进等,均应包含在本发明的保护范围之内。

Claims (21)

  1. 一种数据传输方法,其特征在于,包括:
    通知终端采用特定的MCS方式进行数据传输;以及
    当所述特定的MCS方式为256QAM时,通知所述终端选择对应于256QAM的MCS/CQI/TBS表格,以用于所述数据传输,否则通知所述终端选择原有的MCS/CQI/TBS表格,以用于所述数据传输。
  2. 根据权利要求1所述的数据传输方法,其特征在于,通知所述终端进行表格的选择的过程包括:
    通知所述终端采用特定的传输模式进行所述数据传输;
    其中,当通知所述终端采用所述特定的传输模式的主传输模式进行所述数据传输时,表明所述终端需要选择对应于256QAM的MCS/CQI/TBS表格,当通知所述终端采用所述特定的传输模式的回退模式进行所述数据传输时,表明所述终端需要选择原有的MCS/CQI/TBS表格。
  3. 根据权利要求2所述的数据传输方法,其特征在于,所述主传输模式表示相应的数据传输支持256QAM调制方式,所述回退模式表示相应的数据传输不支持256AQM调制方式。
  4. 根据权利要求2所述的数据传输方法,其特征在于,所述特定的传输模式包括:
    所述终端支持的任一传输模式;
    或仅由支持256QAM的终端专用的传输模式。
  5. 根据权利要求1所述的数据传输方法,其特征在于,通知所述终端进行表格的选择的过程包括:
    当所述特定的MCS方式为256QAM时,采用第一序列对相应的下行控制信息进行加扰,否则采用第二序列对相应的下行控制信息进行加扰。
  6. 根据权利要求1所述的数据传输方法,其特征在于,通知所述终端进行表格的选择的过程包括:
    生成消息帧,所述消息帧中包含表格类型标识,当所述表格类型标识为第一值时,表示所述终端需要选择对应于256QAM的MCS/CQI/TBS表 格,当所述表格类型标识为第二值时,表示所述终端需要选择原有的MCS/CQI/TBS表格;
    向所述终端发送所述消息帧。
  7. 根据权利要求6所述的数据传输方法,其特征在于,所述消息帧为RRC信令或MAC信令。
  8. 根据权利要求1至7中任一项所述的数据传输方法,其特征在于,还包括:
    当所述特定的MCS方式为256QAM时,扩展CQI上报信息的比特位数量。
  9. 根据权利要求8所述的数据传输方法,其特征在于,扩展后的所述CQI上报信息包含3个比特位。
  10. 根据权利要求8所述的数据传输方法,其特征在于,所述CQI上报信息为子带CQI信息。
  11. 一种数据传输装置,其特征在于,包括:
    调制编码方式通知单元,用于通知终端采用特定的MCS方式进行数据传输;
    表格类型通知单元,用于在所述特定的MCS方式为256QAM的情况下,通知所述终端选择对应于256QAM的MCS/CQI/TBS表格,以用于所述数据传输,否则通知所述终端选择原有的MCS/CQI/TBS表格,以用于所述数据传输。
  12. 根据权利要求11所述的数据传输装置,其特征在于,所述表格类型通知单元包括:
    传输模式通知子单元,用于通知所述终端采用特定的传输模式进行所述数据传输;
    其中,当通知所述终端采用所述特定的传输模式的主传输模式进行所述数据传输时,表明所述终端需要选择对应于256QAM的MCS/CQI/TBS表格,当通知所述终端采用所述特定的传输模式的回退模式进行所述数据传输时,表明所述终端需要选择原有的MCS/CQI/TBS表格。
  13. 根据权利要求12所述的数据传输装置,其特征在于,所述主传输 模式表示相应的数据传输支持256QAM调制方式,所述回退模式表示相应的数据传输不支持256AQM调制方式。
  14. 根据权利要求12所述的数据传输装置,其特征在于,所述特定的传输模式包括:
    所述终端支持的任一传输模式;
    或仅由支持256QAM的终端专用的传输模式。
  15. 根据权利要求11所述的数据传输装置,其特征在于,所述表格类型通知单元包括:
    加扰子单元,用于在所述特定的MCS方式为256QAM的情况下,采用第一序列对相应的下行控制信息进行加扰,否则采用第二序列对相应的下行控制信息进行加扰。
  16. 根据权利要求11所述的数据传输装置,其特征在于,所述表格类型通知单元包括:
    消息帧生成子单元,用于生成消息帧,所述消息帧中包含表格类型标识,当所述表格类型标识为第一值时,表示所述终端需要选择对应于256QAM的MCS/CQI/TBS表格,当所述表格类型标识为第二值时,表示所述终端需要选择原有的MCS/CQI/TBS表格;
    消息帧发送子单元,用于向所述终端发送所述消息帧。
  17. 根据权利要求16所述的数据传输装置,其特征在于,所述消息帧为RRC信令或MAC信令。
  18. 根据权利要求11至17中任一项所述的数据传输装置,其特征在于,还包括:
    信息扩展单元,用于当所述特定的MCS方式为256QAM时,扩展CQI上报信息的比特位数量。
  19. 根据权利要求18所述的数据传输装置,其特征在于,扩展后的所述CQI上报信息包含3个比特位。
  20. 根据权利要求18所述的数据传输装置,其特征在于,所述CQI上报信息为子带CQI信息。
  21. 一种基站,其特征在于,包括:如权利要求11至20中任一项所 述的数据传输装置。
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