WO2009129698A1 - 时分双工系统中上行传输功率的确定方法、系统及装置 - Google Patents

时分双工系统中上行传输功率的确定方法、系统及装置 Download PDF

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Publication number
WO2009129698A1
WO2009129698A1 PCT/CN2009/000444 CN2009000444W WO2009129698A1 WO 2009129698 A1 WO2009129698 A1 WO 2009129698A1 CN 2009000444 W CN2009000444 W CN 2009000444W WO 2009129698 A1 WO2009129698 A1 WO 2009129698A1
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WO
WIPO (PCT)
Prior art keywords
subframe
uplink
downlink
uplink subframe
tpc
Prior art date
Application number
PCT/CN2009/000444
Other languages
English (en)
French (fr)
Inventor
潘学明
索士强
肖国军
丁昱
Original Assignee
大唐移动通信设备有限公司
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 大唐移动通信设备有限公司 filed Critical 大唐移动通信设备有限公司
Priority to US12/989,141 priority Critical patent/US8526338B2/en
Priority to MX2010011675A priority patent/MX2010011675A/es
Priority to KR1020107026097A priority patent/KR101184615B1/ko
Priority to JP2011505348A priority patent/JP5341173B2/ja
Priority to EP09735102.7A priority patent/EP2276295B1/en
Publication of WO2009129698A1 publication Critical patent/WO2009129698A1/zh

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W52/00Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04TPC
    • H04W52/06TPC algorithms
    • H04W52/08Closed loop power control
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/14Two-way operation using the same type of signal, i.e. duplex
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W52/00Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04TPC
    • H04W52/18TPC being performed according to specific parameters
    • H04W52/24TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
    • H04W52/246TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters where the output power of a terminal is based on a path parameter calculated in said terminal
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W52/00Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04TPC
    • H04W52/18TPC being performed according to specific parameters
    • H04W52/24TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
    • H04W52/248TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters where transmission power control commands are generated based on a path parameter
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W52/00Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04TPC
    • H04W52/54Signalisation aspects of the TPC commands, e.g. frame structure
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W52/00Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04TPC
    • H04W52/06TPC algorithms
    • H04W52/14Separate analysis of uplink or downlink
    • H04W52/146Uplink power control
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02DCLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00Reducing energy consumption in communication networks
    • Y02D30/70Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • the present invention relates to the field of wireless transmission, and in particular, to a method, system and apparatus for determining uplink transmission power in a time division duplex system. Background technique
  • the uplink power control uses an open-loop and closed-loop combination.
  • the open-loop part is used by the terminal (UE) to transmit power according to uplink resource allocation, transmission format, path loss, and some parameters broadcast by the base station.
  • the closed loop part sends a power control command (TPC) to the UE through the base station to implement uplink transmit power adjustment of the UE.
  • TPC power control command
  • the transmit power of the UE on the uplink shared channel is determined by the base station, but the specific transmit power calculation is performed on the UE side.
  • the base station notifies the UE of the necessary parameters for performing uplink shared channel power control by using a message such as a broadcast message and a radio link control (RRC) signaling, and performs real-time adjustment on the uplink transmit power of the UE through the downlink control channel, and the UE according to the specification
  • RRC radio link control
  • the transmission power m of the UE for data transmission through the PUSCH in the uplink subframe i is determined by the following formula:
  • ⁇ x is the maximum allowed transmit power determined by the UE level
  • M PUSCH ( 0 is the resource size allocated for the PUSCH in effect in the ith uplink subframe, represented by the number of resource blocks (RBs);
  • ⁇ . ⁇ 5 ⁇ ⁇ is the initial value of PUSCH power, which is the normalized part of the 8-bit cell And 4bit UE-specific part P.
  • e ⁇ 0,0.4,0.5,0.6,0.7,0.8,0.9,1 ⁇ is the path loss compensation factor, which is a cell-specific parameter, which is indicated by the high-level signaling through 3 bits;
  • K S is a cell-specific parameter, indicated by RRC signaling. Also, in the formula:
  • rF is the PUSCH transmission format valid in subframe i;
  • the value is the number of resource elements determined by the transport format rF « of the subframe i and the resource allocation size M PUSCH ( 0).
  • (2) SCH is a cumulative correction value obtained by decoding a TPC command received from the first sOT subframe, and the first sOT subframe indicates a subframe that is earlier than the i-th subframe by a subframe length, for example, when i takes 10 Obtaining a PUSCH by decoding a TPC command received from the sixth subframe;
  • the UE in the following state needs to reset the accumulation of the TPC command; a. When performing cell update;
  • SCH is an absolute correction value obtained by decoding a TPC command received from the first- sOT subframe, and the first- sCTf subframe indicates a subframe that is earlier than the i-th subframe by a subframe length;
  • Absolute correction value 4 USCH is indicated by the PDCCH with DCI format 0, and its value set is [-4, -1, 1, 4];
  • the UE uses the above cumulative adjustment mode or the absolute adjustment mode, and the UE selects according to the RRC instruction.
  • the ⁇ is the TPC control delay parameter of the PUSCH, and the TPC used when the i-th subframe transmits the uplink data is sent by the base station in the control signaling in the subframe.
  • TDD time division duplex
  • multi-frame scheduling that is, one scheduling signaling scheduling multiple uplink subframes, when TPC is controlled.
  • the delay does not take a certain value, and the method for determining the TPC control delay in the TDD system is not currently provided.
  • the correspondence between the uplink subframe and the downlink subframe in which the TPC is transmitted cannot be established, so that the terminal pairs an uplink subframe.
  • Figure 1 shows the seven uplink and downlink subframe allocation methods of 0-6 in the existing TDD system:
  • Mode 0-2 is an uplink-downlink subframe allocation mode with a switching point period of 5 ms, where: Each field of mode 0 is composed of one downlink subframe (D), one special subframe (S), and three uplink subframes (U);
  • Mode 1 is composed of 2 downlink subframes, 1 special subframe, and 2 uplink subframes; each subframe of mode 2 consists of 3 downlink subframes, 1 special subframe, and 1 uplink.
  • Mode 3-6 is an uplink-downlink subframe allocation mode with a switching point period of 10 ms, where:
  • Each field of mode 3 is composed of 6 downlink subframes (D), 1 special subframe (S), and 3 uplink subframes (U);
  • Each field of mode 4 is composed of 7 downlink subframes, 1 special subframe, and 2 uplink subframes; each subframe of mode 5 consists of 8 downlink subframes, 1 special subframe, and 1 uplink. Subframe configuration; each field of mode 6 is composed of 3 downlink subframes, 2 special subframes, and 5 uplink subframes.
  • the special subframe is composed of a downlink special time slot (DwPTS), a switching point time slot (GP), and an uplink special time slot.
  • the embodiment of the invention provides a method, a system and a device for determining uplink transmission power in a time division duplex system, which are used to solve the problem that the uplink power control in the existing TDD system cannot be correctly and effectively performed.
  • An embodiment of the present invention provides a method for determining uplink transmission power in a time division duplex system, where the method includes:
  • the base station determines the current uplink-downlink subframe allocation mode, and obtains the frame corresponding information corresponding to the uplink-downlink subframe allocation manner; and selects, according to the frame correspondence information, the downlink control subframe to send the power control TPC command corresponding to the uplink subframe to the terminal;
  • the terminal Before the data is transmitted by using the uplink subframe, the terminal determines a current uplink and downlink subframe allocation manner, acquires frame corresponding information corresponding to the uplink and downlink subframe allocation manner, and determines, according to the frame corresponding information, the uplink subframe to be sent. a downlink subframe corresponding to the TPC command; acquiring power connected from the determined downlink subframe.
  • An embodiment of the present invention provides a time division duplex data transmission system, where the system includes: a base station, configured to determine a current uplink and downlink subframe allocation manner, and obtain frame corresponding information corresponding to the uplink and downlink subframe allocation manner; The frame corresponding information is selected by the downlink subframe to send a power control TPC command corresponding to the uplink subframe to the terminal;
  • a terminal configured to determine a current uplink-downlink subframe allocation manner, and obtain frame corresponding information corresponding to the uplink-downlink subframe allocation manner, and determine, according to the frame correspondence information, the sending the foregoing, before the data is transmitted by using the uplink subframe.
  • a downlink subframe of the TPC command corresponding to the uplink subframe; acquiring a TPC command received from the determined downlink subframe, and determining, according to the TPC command, power for data transmission by using the uplink subframe.
  • An embodiment of the present invention provides a base station, where the base station includes:
  • a structural unit configured to determine a current uplink-downlink subframe allocation manner, and obtain frame corresponding information corresponding to the uplink-downlink subframe allocation manner;
  • a selecting unit configured to select, according to the frame corresponding information, a downlink subframe that sends a power control TPC command to the terminal;
  • a sending unit configured to send the TPC command to the terminal by using the selected downlink subframe.
  • an information unit configured to determine a current uplink and downlink subframe allocation subframe unit, and configured to determine, according to the frame correspondence information, a downlink subroutine for transmitting a power control TPC command corresponding to the uplink subframe, before using the uplink subframe to transmit data. frame;
  • a command unit configured to acquire a TPC command received from the determined downlink subframe
  • a power unit configured to determine, according to the TPC command, power for data transmission by using the uplink subframe.
  • the base station selects a downlink subframe to send a TPC command according to the configured subframe corresponding information
  • the terminal acquires a TPC command received in the corresponding downlink subframe according to the configured subframe corresponding information, and performs power determination according to the TPC command.
  • Enable TDD system to send according to frame corresponding information And receiving the TPC command, so that the uplink power control can be performed correctly and efficiently.
  • FIG. 1 is a schematic diagram of an uplink and downlink subframe allocation manner of an LTE TDD system in the prior art
  • FIG. 2A is a schematic flowchart of a method provided by an embodiment of the present invention
  • 2B is a schematic diagram of configuration of frame correspondence information according to an embodiment of the present invention.
  • 2C is a schematic diagram of configuration of frame correspondence information in an embodiment of the present invention.
  • FIG. 3 is a schematic structural diagram of a system according to an embodiment of the present invention.
  • FIG. 4 is a schematic structural diagram of a base station according to an embodiment of the present invention.
  • FIG. 5 is a schematic structural diagram of a terminal according to an embodiment of the present invention. detailed description
  • the embodiment of the present invention provides a method for determining uplink transmission power in a TDD system.
  • the base station selects a downlink subframe to send a TPC command according to the configuration information, and the terminal according to the configuration The information acquires a TPC command received in the corresponding downlink subframe, and performs power determination according to the TPC command.
  • a method for determining uplink transmission power in a TDD system includes:
  • Step 10 The base station determines the uplink-downlink subframe allocation mode used by the current data transmission, and acquires the frame correspondence information corresponding to the uplink-downlink subframe allocation mode; the uplink-downlink subframe allocation mode, and each uplink-downlink subframe allocation mode corresponds to one The framing correspondence information.
  • the frame corresponding information When the frame corresponding information is obtained, it can be obtained from the local configuration information or obtained from other storage entities.
  • Step 11 The base station selects, according to the obtained frame corresponding information, a downlink subframe to send a power control (TPC) command corresponding to the uplink subframe to the terminal.
  • the frame correspondence information may be a correspondence between the uplink subframe identifier and the downlink subframe identifier, and may also be a correspondence between the uplink subframe identifier and the TPC control delay parameter value.
  • the base station obtains the identifier of the uplink subframe according to the first relationship, and determines, according to the corresponding relationship, the downlink corresponding to the identifier of the uplink subframe. And determining, by using the subframe, the downlink subframe corresponding to the downlink subframe identifier in the uplink subframe as a subframe that sends the TPC command to the terminal, and using the subframe to send the TPC command to the terminal.
  • the base station selects a TPC command corresponding to the uplink subframe to be sent to the terminal according to the frame corresponding information, and the specific method is as follows:
  • the identifier of the uplink subframe is obtained, and the TPC control delay parameter value corresponding to the identifier of the uplink subframe is determined according to the corresponding relationship. Then, determining, before the uplink subframe, and the uplink The time interval of the subframe is a downlink subframe of the determined TPC control delay parameter value, and the downlink subframe is used as a subframe for transmitting the TPC command to the terminal, and the TPC is sent to the terminal by using the subframe. command.
  • Step 12 The terminal determines the current data transmission before using the uplink subframe to transmit data.
  • the uplink and downlink subframe allocation manners, and each uplink and downlink subframe allocation manner corresponds to a group of frame correspondence information.
  • Step 13 The terminal determines, according to the obtained frame corresponding information, a downlink subframe that sends a TPC command corresponding to the uplink subframe.
  • the frame corresponding information may be a corresponding relationship between the uplink subframe identifier and the downlink subframe identifier, and may also be a correspondence between the uplink subframe identifier and the TPC control delay parameter value.
  • the terminal determines First, the identifier of the uplink subframe is obtained, and the downlink subframe identifier corresponding to the identifier of the uplink subframe is determined according to the corresponding relationship. Then, the downlink subframe identifier before the uplink subframe is corresponding to The downlink subframe is determined to be a subframe in which the TPC command is transmitted.
  • the frame correspondence information is a correspondence between the uplink subframe identifier and the TPC control delay parameter value
  • the identifier of the uplink subframe is obtained, and according to the correspondence, the TPC corresponding to the identifier of the uplink subframe is determined. Controlling the delay parameter value; and then determining, in the downlink subframe, before the uplink subframe, and the time interval of the uplink subframe is the downlink subframe of the determined TPC control delay parameter value, determining the downlink subframe A subframe for transmitting the TPC command.
  • Step 14 The terminal acquires a TPC command received from the determined downlink subframe, and determines, according to the TPC command, power for data transmission by using the uplink subframe.
  • the terminal decodes the TPC command received from the downlink subframe to obtain an adjustment correction value 4 USCH ;
  • PUSCH ( - ⁇ ) represents the 4 USCH value received from the subframe i - ⁇ H, and the subframe i - K PUSCH represents before the current uplink subframe i and with the uplink subframe The distance is the downlink subframe of KH.
  • the specific value of SCH - - ⁇ ) is the 4 USCH value obtained after the above decoding.
  • 4 USCH (i - K PUSCH ) represents the 4 USCH value received from the subframe i - K, the subframe, ⁇ - K represents before the current uplink subframe i, and the distance from the uplink subframe is praCTf Downstream subframe.
  • the specific value of ⁇ - K PUSCH ) is the 4 USCH value obtained after the above decoding.
  • the configured subframe corresponding information needs to meet the delay requirement of the terminal to process the downlink control signaling. Therefore, when the subframe corresponding information is the correspondence between the uplink subframe identifier and the downlink subframe identifier, each corresponding relationship
  • the time interval between the uplink subframe and its corresponding downlink subframe is greater than or equal to the processing delay of the terminal for the downlink control signaling. For example, if the processing delay of the downlink control signaling is less than 3 ms, the time interval between the uplink subframe and its corresponding downlink subframe is greater than or equal to 3 ms, and the current length of one subframe is 1 ms.
  • the uplink subframe and the corresponding downlink subframe in the correspondence relationship are separated by at least 4 subframes.
  • the subframe corresponding information is the correspondence between the uplink subframe identifier and the TPC control delay parameter value
  • the downlink subframe determined according to the TPC control delay parameter value in the correspondence relationship, and the uplink subframe in the corresponding relationship The time interval between frames is greater than or equal to the processing delay of the terminal for downlink control signaling.
  • the configured subframe corresponding information supports both single frame scheduling and multi-frame scheduling.
  • the single frame scheduling refers to one uplink subframe in which the control signaling in one downlink subframe is scheduled.
  • the multi-frame scheduling refers to the control signaling in one downlink subframe scheduling a plurality of consecutive uplink subframes.
  • the corresponding relationship between the uplink subframe identifier and the downlink subframe identifier includes a one-to-one correspondence and a one-to-many correspondence, because the single-frame scheduling and the multi-frame scheduling are supported, and the uplink and downlink subframes are asymmetric in the TDD system.
  • One or more of a relationship, a one-to-many correspondence, and a correspondence between the uplink subframe identifier and the TPC control delay parameter value includes a one-to-one correspondence and/or a one-to-many correspondence.
  • the processing delay of the downlink control signaling is 3 ms, and the time length of the subframe is 1 ms.
  • multi-frame scheduling is used, and the TPC command in one downlink subframe is scheduled.
  • the criterion of the first consecutive two uplink subframes after delaying the three subframes is configured for the subframe corresponding information; for the uplink and downlink subframe allocation modes 1-6, the single frame scheduling is used, according to a downlink subframe.
  • the TPC command schedules the first uplink subframe after delaying 3 subframes, and the average distribution TPC
  • the criteria of the command are used to configure the corresponding information of the subframe. See Figure 1 for the uplink and downlink subframe allocation modes in the uplink and downlink subframe allocation modes 0-6.
  • the subframe corresponding information is represented as a schematic diagram of the correspondence between the uplink subframe identifier and the downlink subframe identifier, and the Tx position indicates that the TPC command used to determine the Xth uplink subframe data transmission power is in the current downlink subframe.
  • the Txy position indicates that the TPC command used to determine the transmission power of two consecutive uplink subframes X and y data is transmitted in the current downlink subframe, specifically:
  • the uplink subframe 2 corresponds to the downlink subframe 5 or the special subframe 6; the uplink subframe 3 corresponds to the special subframe 6; the uplink subframe 4 corresponds to the downlink subframe 0; and the uplink subframe 7 corresponds to the downlink.
  • the uplink subframe 2 corresponds to the special subframe 6; the uplink subframe 3 corresponds to the downlink subframe 9; the uplink subframe 7 corresponds to the special subframe 1; and the uplink subframe 8 corresponds to the downlink subframe 4;
  • Upstream and downlink subframe allocation mode 2 uplink subframe 2 corresponds to downlink subframe 8; uplink subframe 7 corresponds to downlink subframe 3;
  • the uplink subframe 2 corresponds to the downlink subframe 8;
  • the uplink subframe 3 corresponds to the downlink subframe 9; and
  • the uplink subframe 4 corresponds to the downlink subframe 0;
  • the uplink subframe 2 corresponds to the downlink subframe 8; the uplink subframe 3 corresponds to the downlink subframe 9;
  • the uplink subframe 2 corresponds to the downlink subframe 8;
  • the uplink subframe 2 corresponds to the downlink subframe 5; the uplink subframe 3 corresponds to the special subframe 6; the uplink subframe 4 corresponds to the downlink subframe 9; the uplink subframe 7 corresponds to the downlink subframe 0; Subframe 8 corresponds to special subframe 1.
  • the uplink and downlink subframe allocation mode 0 is used, and before the terminal uses the current uplink subframe 7 to transmit data, according to the corresponding relationship between the configured uplink subframe identifier and the downlink subframe identifier, the uplink subframe 7 corresponding to the downlink subframe 0 and the special Subframe 1, then the terminal attempts to acquire the TPC command received from the downlink subframe 0 or the special subframe 1, and determines the data transmission using the uplink subframe 7 according to the acquired TPC command. Power.
  • the TPC control delay parameter value corresponding to the uplink subframe 2 is 6 or 7; the TPC control delay parameter value corresponding to the uplink subframe 3 is 7; and the TPC control time corresponding to the uplink subframe 4
  • the value of the delay parameter is 4; the value of the TPC control delay parameter corresponding to the uplink subframe 7 is 6 or 7; the value of the TPC control delay parameter corresponding to the uplink subframe 8 is 7; the value of the TPC control delay parameter corresponding to the uplink subframe 9 Is 4;
  • the TPC control delay parameter value corresponding to the uplink subframe 2 is 6; the TPC control delay parameter value corresponding to the uplink subframe 3 is 4; and the TPC control delay parameter corresponding to the uplink subframe 7 The value is 6; the TPC control delay parameter value corresponding to the uplink subframe 8 is 4;
  • the TPC control delay parameter value corresponding to the uplink subframe 2 is 4; the TPC control delay parameter value corresponding to the uplink subframe 7 is 4;
  • the TPC control delay parameter value corresponding to the uplink subframe 2 is 4; the TPC control delay parameter value corresponding to the uplink subframe 3 is 4; and the TPC control delay parameter corresponding to the uplink subframe 4 Value is 4;
  • the TPC control delay parameter value corresponding to the uplink subframe 2 is 4; the TPC control delay parameter value corresponding to the uplink subframe 3 is 4;
  • the TPC control delay parameter value corresponding to the uplink subframe 2 is 4; for the uplink and downlink subframe allocation mode 6, the TPC control delay parameter value corresponding to the uplink subframe 2 is 7;
  • the value of the TPC control delay parameter corresponding to the frame 3 is 7;
  • the value of the TPC control delay parameter corresponding to the uplink subframe 4 is 5;
  • the value of the TPC control delay parameter corresponding to the uplink subframe 7 is 7;
  • the TPC corresponding to the uplink subframe 8 The control delay parameter value is 7.
  • the terminal uses the current uplink subframe 7 to transmit data before, Determining, according to the corresponding relationship between the configured uplink subframe identifier and the TPC control delay parameter value, that the uplink subframe 7 corresponds to a TPC control delay parameter value of 6 or 7; and then determining, before the uplink subframe 7, and with the uplink subframe 7 is a special subframe 1 with a distance of 6 and a downlink subframe 0 with a distance of 7 from the uplink subframe 7; the terminal attempts to acquire a TPC command received from the downlink subframe 0 or the special subframe 1, and according to The acquired TPC command determines the power for data transmission using the uplink subframe 7.
  • an embodiment of the present invention further provides a time division duplex data transmission system, where the system includes a base station 30 and a terminal 31, where:
  • the base station 30 is configured to determine an uplink and downlink subframe allocation manner used by the current data transmission, and obtain frame corresponding information corresponding to the uplink and downlink subframe allocation manner; and select a downlink subframe according to the frame corresponding information to send an uplink subframe corresponding to the terminal.
  • Power control TPC command ;
  • the terminal 31 is configured to determine an uplink and downlink subframe allocation manner used by the current data transmission, and obtain frame corresponding information corresponding to the uplink and downlink subframe allocation manner, according to the frame corresponding information, before the data is transmitted by using the uplink subframe. Determining a downlink subframe for transmitting a TPC command corresponding to the uplink subframe; acquiring a TPC command received from the determined downlink subframe, and determining, according to the TPC command, power for data transmission by using the uplink subframe.
  • the base station 30 includes a structural unit, a selecting unit, and a sending unit, where:
  • a structural unit configured to determine an uplink and downlink subframe allocation manner used by the current data transmission, and obtain frame corresponding information corresponding to the uplink and downlink subframe allocation manner;
  • a selecting unit configured to select, according to the frame corresponding information, a downlink subframe that sends the TPC command to the terminal;
  • the selecting unit includes an identifying unit and a first determining unit, where: the identifying unit is configured to acquire, when the frame corresponding information includes a correspondence between an uplink subframe identifier and a downlink subframe identifier, An identifier of the uplink subframe, and determining, according to the corresponding relationship, a downlink subframe identifier corresponding to the identifier of the uplink subframe;
  • the selecting unit includes a parameter unit and a second determining unit, where: the parameter unit is configured to: when the frame corresponding information includes a correspondence between an uplink subframe identifier and a TPC control delay parameter value, Obtaining an identifier of the uplink subframe, and determining, according to the correspondence, a TPC control delay parameter value corresponding to the identifier of the uplink subframe;
  • a second determining unit configured to determine a downlink subframe that is before the uplink subframe and that is a time interval of the determined uplink TPC control delay parameter value, and uses the downlink subframe as a direction
  • the terminal sends the subframe of the TPC command.
  • the terminal 31 includes an information unit, a subframe unit, a command unit, and a power unit, where: an information unit, configured to determine, before using the uplink subframe to transmit data, a current data transmission using a subframe unit, configured to correspond to the frame according to the frame Determining, by the information, a downlink subframe that sends a TPC command corresponding to the uplink subframe;
  • a command unit configured to acquire a TPC command received from the determined downlink subframe
  • a power unit configured to determine, according to the TPC command, power for data transmission by using the uplink subframe.
  • the subframe unit includes a first acquiring unit and a first result unit, where: the first acquiring unit is configured to: the frame correspondence information includes a correspondence between an uplink subframe identifier and a downlink subframe identifier. Obtaining an identifier of the uplink subframe, and determining, according to the correspondence, a downlink subframe identifier corresponding to the identifier of the uplink subframe;
  • a first result unit configured to use the determined downlink subframe identification pair before the uplink subframe, where the subframe unit includes a second acquiring unit and a second result unit, where:
  • a second acquiring unit configured to acquire an identifier of the uplink subframe when the frame correspondence information includes a correspondence between an uplink subframe identifier and a TPC control delay parameter value, and determine, according to the correspondence, the identifier a TPC control delay parameter value corresponding to the identifier of the uplink subframe;
  • a second result unit configured to determine, in the downlink subframe, before the uplink subframe, and the time interval of the uplink subframe is the downlink subframe of the determined TPC control delay parameter value, sending the downlink subframe as a sending The subframe of the TPC command corresponding to the uplink subframe.
  • an embodiment of the present invention further provides a base station, which can be applied to a time division duplex data transmission system, where the base station includes a structural unit 40, a selecting unit 41, and a sending unit 42, wherein:
  • the structural unit 40 is configured to determine an uplink and downlink subframe allocation manner used by the current data transmission, and obtain frame corresponding information corresponding to the uplink and downlink subframe allocation manner;
  • the selecting unit 41 is configured to select, according to the frame corresponding information, a downlink subframe that sends a power control TPC command to the terminal;
  • the sending unit 42 is configured to send the TPC command to the terminal by using the selected downlink subframe.
  • the selecting unit 41 includes an identifying unit 50 and a first determining unit 51, where: the identifying unit 50 is configured to obtain when the frame correspondence information includes a correspondence between an uplink subframe identifier and a downlink subframe identifier. Determining, by the identifier of the uplink subframe, a downlink subframe identifier corresponding to the identifier of the uplink subframe according to the corresponding relationship;
  • the first determining unit 51 is configured to use the determined downlink subframe identification pair before the uplink subframe as another embodiment, where the selecting unit 41 includes a parameter unit 52 and a second determining unit 53, where:
  • the parameter unit 52 is configured to: when the frame correspondence information includes a correspondence between an uplink subframe identifier and a TPC control delay parameter value, obtain an identifier of the uplink subframe, and determine, according to the correspondence, the uplink subframe.
  • the second determining unit 53 is configured to determine, in the downlink subframe that is before the uplink subframe, and the time interval of the uplink subframe is the determined TPC control delay parameter value, the downlink subframe is used as the downlink subframe. Sending a subframe of the TPC command to the terminal.
  • an embodiment of the present invention further provides a terminal, which can be applied to time division duplex data transmission.
  • the terminal includes an information unit 60, a subframe unit 61, a command unit 62, and a power unit 63, where:
  • the information unit 60 is configured to determine, after the data is transmitted by using the uplink subframe, a subframe unit 61 that is used by the current data transmission, and is configured to determine, according to the frame corresponding information, a downlink subroutine of the power control TPC command corresponding to the uplink subframe. frame;
  • the command unit 62 is configured to acquire a TPC command received from the determined downlink subframe, and the power unit 63 is configured to determine, according to the TPC command, power for data transmission by using the uplink subframe.
  • the subframe unit 61 includes a first obtaining unit 70 and a first result unit 71, where:
  • the first obtaining unit 70 is configured to: when the frame correspondence information includes a correspondence between the uplink subframe identifier and the downlink subframe identifier, obtain an identifier of the uplink subframe, and determine, according to the correspondence, the uplink subframe.
  • a first result unit 71 configured to use the determined downlink subframe identifier before the uplink subframe as another embodiment, where the subframe unit 61 includes a second obtaining unit 72 and a second result unit 73, where :
  • the second obtaining unit 72 is configured to: when the frame correspondence information includes a correspondence between an uplink subframe identifier and a TPC control delay parameter value, obtain an identifier of the uplink subframe; and determine, according to the correspondence, the uplink The TPC control delay parameter value corresponding to the identifier of the subframe;
  • a second result unit 73 configured to determine a downlink subframe that is before the uplink subframe and that has a time interval of the uplink subframe as the determined TPC control delay parameter value, and the downlink subframe
  • the base station selects a downlink subframe to send a TPC command according to the configured subframe corresponding information
  • the terminal acquires the TPC received by the corresponding downlink subframe according to the configured subframe corresponding information.
  • Command and perform power determination according to the TPC command.
  • the LTE TDD system can transmit and receive TPC commands according to the frame corresponding information, so that the uplink power control can be performed correctly and efficiently.

Description

时分双工系统中上行传输功率的确定方法、 系统及装置 技术领域
本发明涉及无线传输领域, 尤其涉及一种时分双工系统中上行传输功率的 确定方法、 系统及装置。 背景技术
在长期演进(LTE) 系统中, 上行功率控制釆用开环与闭环结合的方式, 开环部分由终端 (UE)根据上行资源分配、 传输格式、 路径损耗以及基站广 播的一些参数来进行发射功率调整, 闭环部分通过基站向 UE发送功率控制命 令(TPC)来实现 UE的上行发射功率调整。
UE在上行共享信道(PUSCH) 的发射功率由基站决定, 但具体的发射功 率计算是在 UE侧执行的。 基站通过广播消息和无线链路控制 (RRC)信令等 消息将 UE执行上行共享信道功率控制的必要参数通知 UE, 并通过下行控制 信道对 UE的上行发射功率进行实时调整, UE根据规范中规定的公式计算当 前的上行共享信道发射功率并执行功率调整。
UE在上行子帧 i中通过 PUSCH进行数据传输的传输功率 m由以下公 式确定:
^PUSCH (0 = mmi^, 101og10 (MPUSCH ( )) + ^PUSCH U) + PL+Aw (TF(i)) + /()} [dBm] 其中,
1. ^x是由 UE等级决定的最大允许发射功率;
2. MPUSCH(O是在第 i上行子帧生效的为 PUSCH分配的资源大小, 以资源块 (RB)数目表示;
3. ρ。Ρυ5αι ·)是 PUSCH功率初始值, 它由 8bit的小区专属归一化部分
Figure imgf000003_0001
和 4bit 的 UE 专属部分 P。 PUSCH( )之和组成。 其中, ― NOMINAL PUSCH( )由高层通知, =0 和 1 ), 并且其动态范围为 [-126,24]dBm, 颗 粒度为 ldB; PO PUSCH )由 RRC配置, =0和 1), 其动态范围为 [-8, 7] dB, 颗粒度为 ldB。 如果 PUSCH传输 /重传对应于已配置的调度许可, 那么 = ; 如果 PUSCH传输 /重传对应于一个接收到的 DCI格式 0的 PDCCH, 其包含新 包传输的调度许可, 那么 =7;
4. «e {0,0.4,0.5,0.6,0.7,0.8,0.9,1}是路径损耗补偿因子, 为小区专属参数, 由高 层信令通过 3bit指示;
5. 是 UE测量的下行路径损耗;
6.
Figure imgf000004_0001
其中, KS 是小区专属参数, 由 RRC信令指示。 此外, 在公式中:
rF«为在子帧 i生效的 PUSCH传输格式;
MPR = modulation x coding rate = wINF。 /Λ½ , 其中, w 。是信息比特数目,
Λ½是由子帧 i的传输格式 rF«和资源分配大小 MPUSCH(0决定的资源单元数目。
7. 当前的 PUSCH功率控制调整状态由 /(0给出, 其定义有以下两种: 第一种, 若釆用累积调整方式, ) = f -i)+SPUSCH -KPUSCH) , 其中:
( 1 ) /(0) = o, KPUSCH = 4;
(2) SCH为累积修正值, 通过解码从第 - sOT子帧接收到的 TPC命令 获得, 第 - sOT子帧表示比第 i子帧提前^ 个子帧长度的子帧, 比如, i取 10时, 通过解码从第 6子帧接收到的 TPC命令获得 PUSCH
(3) 当没有解码出 TPC命令或 UE处于 DRX状态时, 4USCH=odB;
(4)当累积修正值 4USCH由具有 DCI格式 0的 PUSCH指示时,其取值集合为 [-1,0,1,3];
(5) 当累积修正值 4USCH由具有 DCI格式 3/3A的 PUSCH指示时, 其取值集 合为 [-1,1]或 [-1,0,1,3], 具体选择哪个集合是由高层半静态配置的;
(6)若 UE达到最大发射功率, 则"正,,的 TPC命令不进行累积;
(7)若 UE达到最小发射功率, 则"负"的 TPC命令不进行累积;
( 8 )处于如下状态的 UE需要重新设置 TPC命令的累积; a. 当进行小区更新时;
b. 当进入 /离开 RRC激活状态时;
c 当接收到绝对值方式的 TPC命令时;
d. 当收到 RRC通知的 ¾ UE PUSC H )时;
e. 当处于同步 /重同步状态时。
第二种, 若釆用绝对调整方式, 则 /(0 = 4USCH(nPUSCH), 其中:
(1) SCH为绝对修正值, 通过解码从第 - sOT子帧接收到的 TPC命令 获得, 第 - sCTf子帧表示比第 i子帧提前^ 个子帧长度的子帧;
( 2 ) KPUSCH = 4,
(3)绝对修正值 4USCH由具有 DCI格式 0的 PDCCH指示, 其取值集合为 [-4, -1, 1,4];
(4)如果没有解码出 TPC命令或 UE处于 DRX状态时, /« = /(,-1) 。
具体是釆用上述累积调整方式或是绝对调整方式, UE根据 RRC的指示来 选择。
所述^ 为 PUSCH的 TPC控制时延参数, 第 i子帧发送上行数据时使 用的 TPC 是基站在第 子帧中的控制信令中发送的。 对于频分双工 ( FDD ) 系统, UE对下行控制信令的处理时延为 3ms以内, 因此 sOT = 4。
而对于时分双工(TDD) 系统, 由于存在多种上下行子帧分配方式(如图 1 所示), 以及多帧调度, 即一条调度信令调度多个上行子帧的情况, TPC控 制时延不能够取确定值, 并且目前也没有给出 TDD系统中 TPC控制时延的确 定方法, 上行子帧与传输 TPC 的下行子帧之间的对应关系无法建立, 使得终 端对某个上行子帧进行数据传输的功率控制时, 无法确定应该从哪个下行子帧 获得 TPC命令,进而无法根据 TPC命令中的 4USCH参数来确定传输功率。也即, TDD系统中上行功率控制不能够正确有效的进行。
图 1所示为现有 TDD系统中 0-6的七种上下行子帧分配方式:
方式 0-2为切换点周期为 5ms的上下行子帧分配方式, 其中: 方式 0的每个半帧由 1个下行子帧 ( D )、 1个特殊子帧 ( S )和 3个上行 子帧 (U )构成;
方式 1的每个半帧由 2个下行子帧、 1个特殊子帧和 2个上行子帧构成; 方式 2的每个半帧由 3个下行子帧、 1个特殊子帧和 1个上行子帧构成。 方式 3-6为切换点周期为 10ms的上下行子帧分配方式, 其中:
方式 3的每个半帧由 6个下行子帧 ( D )、 1个特殊子帧 ( S )和 3个上行 子帧 (U )构成;
方式 4的每个半帧由 7个下行子帧、 1个特殊子帧和 2个上行子帧构成; 方式 5的每个半帧由 8个下行子帧、 1个特殊子帧和 1个上行子帧构成; 方式 6的每个半帧由 3个下行子帧、 2个特殊子帧和 5个上行子帧构成。 特殊子帧由下行特殊时隙 ( DwPTS )、 切换点时隙 ( GP )和上行特殊时隙 构成。 发明内容
本发明实施例提供一种时分双工系统中上行传输功率的确定方法、 系统及 装置, 用以解决现有 TDD系统中上行功率控制不能够正确有效进行的问题。
本发明实施例提供一种时分双工系统中上行传输功率的确定方法, 该方法 包括:
基站确定当前的上下行子帧分配方式, 获取所述上下行子帧分配方式对应 的帧对应信息; 根据所述帧对应信息选择下行子帧向终端发送上行子帧对应的 功率控制 TPC命令;
终端在利用所述上行子帧传输数据前, 确定当前的上下行子帧分配方式, 获取所述上下行子帧分配方式对应的帧对应信息,根据所述帧对应信息确定发 送所述上行子帧对应的 TPC命令的下行子帧; 获取从所述确定的下行子帧接 的功率。 本发明实施例提供一种时分双工数据传输系统, 该系统包括: 基站, 用于确定当前的上下行子帧分配方式, 获取所述上下行子帧分配方 式对应的帧对应信息; 根据所述帧对应信息选择下行子帧向终端发送上行子帧 对应的功率控制 TPC命令;
终端, 用于在利用所述上行子帧传输数据前, 确定当前的上下行子帧分配 方式, 获取所述上下行子帧分配方式对应的帧对应信息, 根据所述帧对应信息 确定发送所述上行子帧对应的 TPC命令的下行子帧; 获取从所述确定的下行 子帧接收到的 TPC命令, 并根据所述 TPC命令确定利用所述上行子帧进行数 据传输的功率。
本发明实施例提供一种基站, 该基站包括:
结构单元, 用于确定当前的上下行子帧分配方式, 获取所述上下行子帧分 配方式对应的帧对应信息;
选择单元, 用于根据所述帧对应信息选择向终端发送功率控制 TPC命令 的下行子帧;
发送单元, 用于利用所述选择的下行子帧向终端发送所述 TPC命令。 本发明实施例提供一种终端, 该终端包括:
信息单元, 用于在利用上行子帧传输数据前, 确定当前的上下行子帧分配 子帧单元, 用于根据所述帧对应信息确定发送所述上行子帧对应的功率控 制 TPC命令的下行子帧;
命令单元, 用于获取从所述确定的下行子帧接收到的 TPC命令; 功率单元, 用于根据所述 TPC命令确定利用所述上行子帧进行数据传输 的功率。
本发明实施例中, 基站根据配置的子帧对应信息选择下行子帧发送 TPC 命令, 终端根据配置的子帧对应信息获取相应下行子帧接收到的 TPC命令, 并根据该 TPC命令进行功率确定。 使得 TDD系统中能够根据帧对应信息发送 和接收 TPC命令, 从而上行功率控制能够正确有效的进行。 附图说明
图 1为现有技术中 LTE TDD系统的上下行子帧分配方式示意图; 图 2A为本发明实施例所提供方法的流程示意图;
图 2B为本发明实施例中帧对应信息的配置示意图;
图 2C为本发明实施例中帧对应信息的配置示意图;
图 3为本发明实施例所提供系统的结构示意图;
图 4为本发明实施例所提供基站的结构示意图;
图 5为本发明实施例所提供终端的结构示意图。 具体实施方式
为了使得 TDD 系统中上行功率控制能够正确有效的进行, 本发明实施例 提供一种 TDD 系统中上行传输功率的确定方法, 本方法中, 基站根据配置信 息选择下行子帧发送 TPC命令, 终端根据配置信息获取相应下行子帧接收到 的 TPC命令, 并根据该 TPC命令进行功率确定。
参见图 2A, 本发明实施例提供的 TDD系统中上行传输功率的确定方法, 具体包括:
步骤 10:基站确定当前数据传输使用的上下行子帧分配方式,获取所述上 下行子帧分配方式对应的帧对应信息; 种上下行子帧分配方式, 每种上下行子帧分配方式对应一组帧对应信息。 在获 取帧对应信息时, 可以从本地的配置信息中获取, 也可以从其他存储实体中获 取。
步骤 11 :基站根据获取到的帧对应信息选择下行子帧向终端发送上行子帧 对应的功率控制 (TPC )命令; 这里, 帧对应信息具体可以是上行子帧标识与下行子帧标识的对应关系, 还可以是上行子帧标识与 TPC控制时延参数值的对应关系。
若所述帧对应信息为上行子帧标识与下行子帧标识的对应关系,基站根据 首先, 获取所述上行子帧的标识, 根据所述对应关系, 确定所述上行子帧 的标识对应的下行子帧标识; 然后, 将所述上行子帧之前的所述下行子帧标识 对应的下行子帧作为向终端发送所述 TPC命令的子帧, 并利用该子帧向终端 发送所述 TPC命令。
若所述帧对应信息为上行子帧标识与 TPC控制时延参数值的对应关系, 基站根据帧对应信息选择下行子帧向终端发送上行子帧对应的 TPC命令具体 方法如下:
首先, 获取所述上行子帧的标识, 根据所述对应关系, 确定所述上行子帧 的标识对应的 TPC控制时延参数值; 然后, 确定在所述上行子帧之前、 并且 与所述上行子帧的时间间隔为所述确定的 TPC控制时延参数值大小的下行子 帧, 将该下行子帧作为向终端发送所述 TPC命令的子帧, 并利用该子帧向终 端发送所述 TPC命令。
步骤 12: 终端在利用所述上行子帧传输数据前,确定当前数据传输使用的
种上下行子帧分配方式, 每种上下行子帧分配方式对应一组帧对应信息。
步骤 13:终端根据获取到的帧对应信息确定发送所述上行子帧对应的 TPC 命令的下行子帧;
同样的, 这里帧对应信息具体可以是上行子帧标识与下行子帧标识的对应 关系, 还可以是上行子帧标识与 TPC控制时延参数值的对应关系。
若所述帧对应信息为上行子帧标识与下行子帧标识的对应关系, 终端确定 首先, 获取所述上行子帧的标识, 根据所述对应关系, 确定所述上行子帧 的标识对应的下行子帧标识; 然后, 将在所述上行子帧之前的所述下行子帧标 识对应的下行子帧确定为发送所述 TPC命令的子帧。
若所述帧对应信息为上行子帧标识与 TPC控制时延参数值的对应关系, 首先, 获取所述上行子帧的标识, 根据所述对应关系, 确定所述上行子帧 的标识对应的 TPC控制时延参数值; 然后, 确定在所述上行子帧之前、 并且 与所述上行子帧的时间间隔为所述确定的 TPC控制时延参数值大小的下行子 帧, 将该下行子帧确定为发送所述 TPC命令的子帧。
步骤 14: 终端获取从所述确定的下行子帧接收到的 TPC命令, 并根据所 述 TPC命令确定利用所述上行子帧进行数据传输的功率。
具体的, 首先, 终端对从所述下行子帧接收到的 TPC命令进行解码, 获 得调整修正值 4USCH ;
然后, 釆用累积调整方式或绝对调整方式, 确定当前的 PUSCH功率调整 状态 /(0的值, 即:
若釆用累积调整方式, 则 /('■) = f _ 1) + ^PUSCH ('■ - K PUSCH );
其中, /(0) = 0 , PUSCH ( - κ )表示从子帧 i - κ H接收到的 4USCH值, 子帧 i - KPUSCH表示在当前上行子帧 i之前、并且与该上行子帧的距离为 K H 的下行 子帧。 SCH - - κ )的具体取值即为上述解码后获得的 4USCH值。
若釆用绝对调整方式, 则 ( = ^PUSCH (; _ ^PUSCH ),
其中, 4USCH (i - KPUSCH )表示从子帧 i - K 接收到的 4USCH值,子帧 ,· - K 表 示在当前上行子帧 i之前、 并且与该上行子帧的距离为 praCTf 的下行子帧。
^ - KPUSCH )的具体取值即为上述解码后获得的 4USCH值。
最后, 根据现有公式:
Figure imgf000010_0001
(mPUSCH (0) + ¾_PUSCH ') + - PL + ATF (TF(i)) + /(/)} ,
确定利用当前上行子帧进行传输数据的功率。 本发明中, 配置的子帧对应信息需要满足终端处理下行控制信令的延时要 求, 因此当子帧对应信息为上行子帧标识与下行子帧标识的对应关系时, 每条 对应关系中的上行子帧与其对应的下行子帧之间的时间间隔大于或等于终端 对下行控制信令的处理时延。 例如, 若终端对下行控制信令的处理时延为 3ms 以内, 那么对应关系中上行子帧与其对应的下行子帧之间的时间间隔大于或等 于 3ms , 目前一个子帧的时间长度为 1ms , 对应关系中上行子帧与其对应的下 行子帧之间至少间隔 4个子帧。
同样的, 当子帧对应信息为上行子帧标识与 TPC控制时延参数值的对应 关系时, 根据对应关系中的 TPC控制时延参数值确定的下行子帧, 与该对应 关系中的上行子帧之间的时间间隔大于或等于终端对下行控制信令的处理时 延。
本发明中, 配置的子帧对应信息既支持单帧调度的情况, 也支持多帧调度 的情况。 单帧调度是指一个下行子帧中的控制信令调度其后的一个上行子帧, 多帧调度是指一个下行子帧中的控制信令调度其后连续的多个上行子帧,该多 由于支持单帧调度和多帧调度, 以及 TDD系统中上下行子帧非对称等原 因, 所述上行子帧标识与下行子帧标识的对应关系包括一对一的对应关系、 一 对多的对应关系、 多对一的对应关系中的一种或多种; 所述上行子帧标识与 TPC控制时延参数值的对应关系包括一对一的对应关系和 /或一对多的对应关 系。
下面以具体实例对本发明方法进行说明:
假设终端对下行控制信令的处理时延为 3ms,—个子帧的时间长度为 1ms, 对于上下行子帧分配方式 0 , 釆用多帧调度, 按照一个下行子帧中的 TPC命令 调度其后延时 3个子帧后的第一个连续的两个上行子帧的准则进行子帧对应信 息的配置; 对于上下行子帧分配方式 1-6, 釆用单帧调度, 按照一个下行子帧 中的 TPC命令调度其后延时 3个子帧后的第一个上行子帧,以及平均分布 TPC 命令的准则进行子帧对应信息的配置。 上下行子帧分配方式 0-6中的上下行子 帧分配方式参见图 1。
如图 2B所示, 为子帧对应信息表示为上行子帧标识与下行子帧标识的对 应关系的示意图, Tx位置表示确定第 X上行子帧数据传输功率所使用的 TPC 命令在当前下行子帧发送; Txy位置表示确定连续两个上行子帧 X和 y数据传 输功率所使用的 TPC命令在当前下行子帧发送, 具体的:
对于上下行子帧分配方式 0 , 上行子帧 2对应下行子帧 5或特殊子帧 6; 上行子帧 3对应特殊子帧 6; 上行子帧 4对应下行子帧 0; 上行子帧 7对应下 行子帧 0或特殊子帧 1 ; 上行子帧 8对应特殊子帧 1 ; 上行子帧 9对应下行子 帧 5;
对于上下行子帧分配方式 1 , 上行子帧 2对应特殊子帧 6; 上行子帧 3对 应下行子帧 9; 上行子帧 7对应特殊子帧 1 ; 上行子帧 8对应下行子帧 4; 对于上下行子帧分配方式 2 , 上行子帧 2对应下行子帧 8; 上行子帧 7对 应下行子帧 3 ;
对于上下行子帧分配方式 3 , 上行子帧 2对应下行子帧 8; 上行子帧 3对 应下行子帧 9; 上行子帧 4对应下行子帧 0;
对于上下行子帧分配方式 4 , 上行子帧 2对应下行子帧 8; 上行子帧 3对 应下行子帧 9;
对于上下行子帧分配方式 5 , 上行子帧 2对应下行子帧 8;
对于上下行子帧分配方式 6 , 上行子帧 2对应下行子帧 5; 上行子帧 3对 应特殊子帧 6; 上行子帧 4对应下行子帧 9; 上行子帧 7对应下行子帧 0; 上行 子帧 8对应特殊子帧 1。
假设釆用上下行子帧分配方式 0 , 终端利用当前上行子帧 7传输数据前, 根据配置的上行子帧标识与下行子帧标识的对应关系, 确定上行子帧 7对应下 行子帧 0和特殊子帧 1 , 那么终端尝试获取从下行子帧 0或特殊子帧 1接收到 的 TPC命令, 并根据获取到的 TPC命令确定利用上行子帧 7进行数据传输的 功率。
如图 2C所示, 为子帧对应信息表示为上行子帧标识与 TPC控制时延参数 值的对应关系的示意图, x/y解释为: 若该上行子帧为多帧调度中的第一个上 行子帧, 则 TPC控制时延参数 ^^CT=x; 若该上行子帧为多帧调度中的第二个 上行子帧, 则 PraCT=y, 具体的:
对于上下行子帧分配方式 0, 上行子帧 2对应的 TPC控制时延参数值为 6 或 7; 上行子帧 3对应的 TPC控制时延参数值为 7; 上行子帧 4对应的 TPC控 制时延参数值为 4; 上行子帧 7对应的 TPC控制时延参数值为 6或 7; 上行子 帧 8对应的 TPC控制时延参数值为 7; 上行子帧 9对应的 TPC控制时延参数 值为 4;
对于上下行子帧分配方式 1 ,上行子帧 2对应的 TPC控制时延参数值为 6; 上行子帧 3对应的 TPC控制时延参数值为 4; 上行子帧 7对应的 TPC控制时 延参数值为 6; 上行子帧 8对应的 TPC控制时延参数值为 4;
对于上下行子帧分配方式 2,上行子帧 2对应的 TPC控制时延参数值为 4; 上行子帧 7对应的 TPC控制时延参数值为 4;
对于上下行子帧分配方式 3 ,上行子帧 2对应的 TPC控制时延参数值为 4; 上行子帧 3对应的 TPC控制时延参数值为 4; 上行子帧 4对应的 TPC控制时 延参数值为 4;
对于上下行子帧分配方式 4,上行子帧 2对应的 TPC控制时延参数值为 4; 上行子帧 3对应的 TPC控制时延参数值为 4;
对于上下行子帧分配方式 5 ,上行子帧 2对应的 TPC控制时延参数值为 4; 对于上下行子帧分配方式 6,上行子帧 2对应的 TPC控制时延参数值为 7; 上行子帧 3对应的 TPC控制时延参数值为 7; 上行子帧 4对应的 TPC控制时 延参数值为 5; 上行子帧 7对应的 TPC控制时延参数值为 7; 上行子帧 8对应 的 TPC控制时延参数值为 7。
假设釆用上下行子帧分配方式 0 , 终端利用当前上行子帧 7传输数据前, 根据配置的上行子帧标识与 TPC控制时延参数值的对应关系,确定上行子帧 7 对应 TPC控制时延参数值为 6或 7; 然后, 确定在上行子帧 7之前、 并且与上 行子帧 7的距离为 6的是特殊子帧 1 , 与上行子帧 7的距离为 7的是下行子帧 0; 终端再尝试获取从下行子帧 0或特殊子帧 1接收到的 TPC命令, 并根据获 取到的 TPC命令确定利用上行子帧 7进行数据传输的功率。
参见图 3 , 本发明实施例还提供一种时分双工数据传输系统, 该系统包括 基站 30和终端 31 , 其中:
基站 30,用于确定当前数据传输使用的上下行子帧分配方式,获取所述上 下行子帧分配方式对应的帧对应信息; 根据所述帧对应信息选择下行子帧向终 端发送上行子帧对应的功率控制 TPC命令;
终端 31 ,用于在利用所述上行子帧传输数据前,确定当前数据传输使用的 上下行子帧分配方式, 获取所述上下行子帧分配方式对应的帧对应信息, 根据 所述帧对应信息确定发送所述上行子帧对应的 TPC命令的下行子帧; 获取从 所述确定的下行子帧接收到的 TPC命令, 并根据所述 TPC命令确定利用所述 上行子帧进行数据传输的功率。
具体的, 基站 30包括结构单元、 选择单元和发送单元, 其中:
结构单元, 用于确定当前数据传输使用的上下行子帧分配方式, 获取所述 上下行子帧分配方式对应的帧对应信息;
选择单元, 用于根据所述帧对应信息选择向终端发送所述 TPC命令的下 行子帧;
发送单元, 用于利用所述选择的下行子帧向终端发送所述 TPC命令。 作为一种实施例, 所述选择单元包括标识单元和第一确定单元, 其中: 标识单元, 用于在所述帧对应信息包括上行子帧标识与下行子帧标识的对 应关系时, 获取所述上行子帧的标识, 根据所述对应关系, 确定所述上行子帧 的标识对应的下行子帧标识;
第一确定单元, 用于将所述上行子帧之前的所述确定的下行子帧标识对应 作为另一种实施例, 所述选择单元包括参数单元和第二确定单元, 其中: 参数单元, 用于在所述帧对应信息包括上行子帧标识与 TPC控制时延参 数值的对应关系时, 获取所述上行子帧的标识, 根据所述对应关系, 确定所述 上行子帧的标识对应的 TPC控制时延参数值;
第二确定单元, 用于确定在所述上行子帧之前、 并且与所述上行子帧的时 间间隔为所述确定的 TPC控制时延参数值大小的下行子帧, 将该下行子帧作 为向终端发送所述 TPC命令的子帧。
终端 31包括信息单元、 子帧单元、 命令单元和功率单元, 其中: 信息单元, 用于在利用所述上行子帧传输数据前, 确定当前数据传输使用 子帧单元, 用于根据所述帧对应信息确定发送所述上行子帧对应的 TPC 命令的下行子帧;
命令单元, 用于获取从所述确定的下行子帧接收到的 TPC命令; 功率单元, 用于根据所述 TPC命令确定利用所述上行子帧进行数据传输 的功率。
作为一种实施例,所述子帧单元包括第一获取单元和第一结果单元,其中: 第一获取单元, 用于在所述帧对应信息包括上行子帧标识与下行子帧标识 的对应关系时, 获取所述上行子帧的标识, 根据所述对应关系, 确定所述上行 子帧的标识对应的下行子帧标识;
第一结果单元, 用于将在所述上行子帧之前的所述确定的下行子帧标识对 作为另一种实施例, 所述子帧单元包括第二获取单元和第二结果单元, 其 中:
第二获取单元, 用于在所述帧对应信息包括上行子帧标识与 TPC控制时 延参数值的对应关系时, 获取所述上行子帧的标识; 根据所述对应关系, 确定 所述上行子帧的标识对应的 TPC控制时延参数值;
第二结果单元, 用于确定在所述上行子帧之前、 并且与所述上行子帧的时 间间隔为所述确定的 TPC控制时延参数值大小的下行子帧, 将该下行子帧作 为发送所述上行子帧对应的 TPC命令的子帧。
参见图 4 , 本发明实施例还提供一种基站, 可以应用于时分双工数据传输 系统中, 该基站包括结构单元 40、 选择单元 41和发送单元 42, 其中:
结构单元 40 ,用于确定当前数据传输使用的上下行子帧分配方式,获取所 述上下行子帧分配方式对应的帧对应信息;
选择单元 41 , 用于根据所述帧对应信息选择向终端发送功率控制 TPC命 令的下行子帧;
发送单元 42 , 用于利用所述选择的下行子帧向终端发送所述 TPC命令。 作为一种实施例,选择单元 41包括标识单元 50和第一确定单元 51 ,其中: 标识单元 50,用于在所述帧对应信息包括上行子帧标识与下行子帧标识的 对应关系时, 获取所述上行子帧的标识, 根据所述对应关系, 确定所述上行子 帧的标识对应的下行子帧标识;
第一确定单元 51 ,用于将所述上行子帧之前的所述确定的下行子帧标识对 作为另一种实施例,选择单元 41包括参数单元 52和第二确定单元 53 ,其 中:
参数单元 52, 用于在所述帧对应信息包括上行子帧标识与 TPC控制时延 参数值的对应关系时, 获取所述上行子帧的标识, 根据所述对应关系, 确定所 述上行子帧的标识对应的 TPC控制时延参数值;
第二确定单元 53 ,用于确定在所述上行子帧之前、并且与所述上行子帧的 时间间隔为所述确定的 TPC控制时延参数值大小的下行子帧, 将该下行子帧 作为向终端发送所述 TPC命令的子帧。
参见图 5 , 本发明实施例还提供一种终端, 可以应用于时分双工数据传输 系统中, 该终端包括信息单元 60、 子帧单元 61、 命令单元 62和功率单元 63 , 其中:
信息单元 60 ,用于在利用上行子帧传输数据前,确定当前数据传输使用的 子帧单元 61 ,用于根据所述帧对应信息确定发送所述上行子帧对应的功率 控制 TPC命令的下行子帧;
命令单元 62 , 用于获取从所述确定的下行子帧接收到的 TPC命令; 功率单元 63 , 用于根据所述 TPC命令确定利用所述上行子帧进行数据传 输的功率。
作为一种实施例, 子帧单元 61包括第一获取单元 70和第一结果单元 71 , 其中:
第一获取单元 70,用于在所述帧对应信息包括上行子帧标识与下行子帧标 识的对应关系时, 获取所述上行子帧的标识, 根据所述对应关系, 确定所述上 行子帧的标识对应的下行子帧标识;
第一结果单元 71 ,用于将在所述上行子帧之前的所述确定的下行子帧标识 作为另一种实施例,子帧单元 61包括第二获取单元 72和第二结果单元 73 , 其中:
第二获取单元 72 , 用于在所述帧对应信息包括上行子帧标识与 TPC控制 时延参数值的对应关系时, 获取所述上行子帧的标识; 根据所述对应关系, 确 定所述上行子帧的标识对应的 TPC控制时延参数值;
第二结果单元 73 ,用于确定在所述上行子帧之前、并且与所述上行子帧的 时间间隔为所述确定的 TPC控制时延参数值大小的下行子帧, 将该下行子帧 本发明实施例提供的方案中,基站根据配置的子帧对应信息选择下行子帧 发送 TPC命令,终端根据配置的子帧对应信息获取相应下行子帧接收到的 TPC 命令, 并根据该 TPC命令进行功率确定。 使得 LTE TDD系统中能够根据帧对 应信息发送和接收 TPC命令, 从而上行功率控制能够正确有效的进行。 明的精神和范围。 这样, 倘若本发明的这些修改和变型属于本发明权利要求及 其等同技术的范围之内, 则本发明也意图包含这些改动和变型在内。

Claims

权 利 要 求
1、 一种时分双工系统中上行传输功率的确定方法, 其特征在于, 该方法 包括:
基站确定当前的上下行子帧分配方式, 获取所述上下行子帧分配方式对应 的帧对应信息; 根据所述帧对应信息选择下行子帧向终端发送上行子帧对应的 功率控制 TPC命令;
终端在利用所述上行子帧传输数据前, 确定当前的上下行子帧分配方式, 获取所述上下行子帧分配方式对应的帧对应信息,根据所述帧对应信息确定发 送所述上行子帧对应的 TPC命令的下行子帧; 获取从所述确定的下行子帧接 的功率。
2、 如权利要求 1所述的方法, 其特征在于,
若所述帧对应信息包括上行子帧标识与下行子帧标识的对应关系, 所述基 获取所述上行子帧的标识, 根据所述对应关系, 确定所述上行子帧的标识 对应的下行子帧标识, 将所述上行子帧之前的所述下行子帧标识对应的下行子 帧作为向终端发送所述 TPC命令的子帧;
若所述帧对应信息包括上行子帧标识与 TPC控制时延参数值的对应关系, 获取所述上行子帧的标识, 根据所述对应关系, 确定所述上行子帧的标识 对应的 TPC控制时延参数值, 确定在所述上行子帧之前、 并且与所述上行子 帧的时间间隔为所述确定的 TPC控制时延参数值大小的下行子帧, 将该下行 子帧作为向终端发送所述 TPC命令的子帧。
3、 如权利要求 1所述的方法, 其特征在于,
若所述帧对应信息包括上行子帧标识与下行子帧标识的对应关系, 所述终 端确定发送所述 TPC命令的下行子帧包括:
获取所述上行子帧的标识, 根据所述对应关系, 确定所述上行子帧的标识 对应的下行子帧标识; 将在所述上行子帧之前的所述下行子帧标识对应的下行 子帧作为发送所述 TPC命令的子帧;
若所述帧对应信息包括上行子帧标识与 TPC控制时延参数值的对应关系, 所述终端确定发送所述 TPC命令的下行子帧包括:
获取所述上行子帧的标识, 根据所述对应关系, 确定所述上行子帧的标识 对应的 TPC控制时延参数值; 确定在所述上行子帧之前、 并且与所述上行子 帧的时间间隔为所述确定的 TPC控制时延参数值大小的下行子帧, 将该下行 子帧作为发送所述 TPC命令的子帧。
4、 如权利要求 2或 3所述的方法, 其特征在于, 所述上行子帧标识与下 行子帧标识的对应关系中, 上行子帧与该上行子帧对应的下行子帧之间的时间 间隔大于或等于所述终端对下行控制信令的处理时延。
5、 如权利要求 2或 3所述的方法, 其特征在于,
所述上行子帧标识与下行子帧标识的对应关系包括以下一种或多种对应 关系: 一对一的对应关系, 一对多的对应关系, 多对一的对应关系;
所述上行子帧标识与 TPC控制时延参数值的对应关系包括: 一对一的对 应关系和 /或一对多的对应关系。
6、 如权利要求 2或 3所述的方法, 其特征在于, 在所述终端对下行控制 信令的处理时延为 3ms时, 所述上行子帧标识与下行子帧标识的对应关系为: 若釆用上下行子帧分配方式 0 , 则上行子帧 2对应下行子帧 5或特殊子帧 6; 上行子帧 3对应特殊子帧 6; 上行子帧 4对应下行子帧 0; 上行子帧 7对应 下行子帧 0或特殊子帧 1 ; 上行子帧 8对应特殊子帧 1 ; 上行子帧 9对应下行 子帧 5;
若釆用上下行子帧分配方式 1 , 则上行子帧 2对应特殊子帧 6; 上行子帧 3 对应下行子帧 9; 上行子帧 7对应特殊子帧 1 ; 上行子帧 8对应下行子帧 4; 若釆用上下行子帧分配方式 2, 则上行子帧 2对应下行子帧 8; 上行子帧 7 对应下行子帧 3;
若釆用上下行子帧分配方式 3 , 则上行子帧 2对应下行子帧 8; 上行子帧 3 对应下行子帧 9; 上行子帧 4对应下行子帧 0;
若釆用上下行子帧分配方式 4, 则上行子帧 2对应下行子帧 8; 上行子帧 3 对应下行子帧 9;
若釆用上下行子帧分配方式 5 , 则上行子帧 2对应下行子帧 8;
若釆用上下行子帧分配方式 6, 则上行子帧 2对应下行子帧 5; 上行子帧 3 对应特殊子帧 6; 上行子帧 4对应下行子帧 9; 上行子帧 7对应下行子帧 0; 上 行子帧 8对应特殊子帧 1。
7、 如权利要求 6所述的方法, 其特征在于, 在釆用上下行子帧分配方式 0 时, 若上行子帧 2为多帧调度的连续两个上行子帧中的第二个, 则对应下行子 帧 5 , 否则对应特殊子帧 6; 若上行子帧 7为多帧调度的连续两个上行子帧中 的第二个, 则对应下行子帧 0, 否则对应特殊子帧 1。
8、 如权利要求 2或 3所述的方法, 其特征在于, 在所述终端对下行控制 信令的处理时延为 3ms时, 所述上行子帧标识与 TPC控制时延参数值的对应 关系为:
若釆用上下行子帧分配方式 0时, 则上行子帧 2对应的 TPC控制时延参 数值为 6或 7; 上行子帧 3对应的 TPC控制时延参数值为 7; 上行子帧 4对应 的 TPC控制时延参数值为 4;上行子帧 7对应的 TPC控制时延参数值为 6或 7; 上行子帧 8对应的 TPC控制时延参数值为 7; 上行子帧 9对应的 TPC控制时 延参数值为 4;
若釆用上下行子帧分配方式 1时, 则上行子帧 2对应的 TPC控制时延参 数值为 6;上行子帧 3对应的 TPC控制时延参数值为 4;上行子帧 7对应的 TPC 控制时延参数值为 6; 上行子帧 8对应的 TPC控制时延参数值为 4;
若釆用上下行子帧分配方式 2时, 则上行子帧 2对应的 TPC控制时延参 数值为 4; 上行子帧 7对应的 TPC控制时延参数值为 4;
若釆用上下行子帧分配方式 3时, 则上行子帧 2对应的 TPC控制时延参 数值为 4;上行子帧 3对应的 TPC控制时延参数值为 4;上行子帧 4对应的 TPC 控制时延参数值为 4;
若釆用上下行子帧分配方式 4时, 则上行子帧 2对应的 TPC控制时延参 数值为 4; 上行子帧 3对应的 TPC控制时延参数值为 4;
若釆用上下行子帧分配方式 5时, 则上行子帧 2对应的 TPC控制时延参 数值为 4;
若釆用上下行子帧分配方式 6时, 则上行子帧 2对应的 TPC控制时延参 数值为 7;上行子帧 3对应的 TPC控制时延参数值为 7;上行子帧 4对应的 TPC 控制时延参数值为 5; 上行子帧 7对应的 TPC控制时延参数值为 7; 上行子帧 8对应的 TPC控制时延参数值为 7。
9、 如权利要求 8所述的方法, 其特征在于, 在釆用上下行子帧分配方式 0 时, 若上行子帧 2为多帧调度的连续两个上行子帧中的第一个, 则对应的 TPC 下行控制时延参数值为 6 , 否则对应的 TPC下行控制时延参数值为 7; 若上行 子帧 7为多帧调度的连续两个上行子帧中的第一个, 则对应的 TPC下行控制 时延参数值为 6, 否则对应的 TPC下行控制时延参数值为 7。
10、 一种时分双工数据传输系统, 其特征在于, 该系统包括:
基站, 用于确定当前的上下行子帧分配方式, 获取所述上下行子帧分配方 式对应的帧对应信息; 根据所述帧对应信息选择下行子帧向终端发送上行子帧 对应的功率控制 TPC命令;
终端, 用于在利用所述上行子帧传输数据前, 确定当前的上下行子帧分配 方式, 获取所述上下行子帧分配方式对应的帧对应信息, 根据所述帧对应信息 确定发送所述上行子帧对应的 TPC命令的下行子帧; 获取从所述确定的下行 子帧接收到的 TPC命令, 并根据所述 TPC命令确定利用所述上行子帧进行数 据传输的功率。
11、 一种基站, 其特征在于, 该基站包括:
结构单元, 用于确定当前的上下行子帧分配方式, 获取所述上下行子帧分 配方式对应的帧对应信息;
选择单元, 用于根据所述帧对应信息选择向终端发送功率控制 TPC命令 的下行子帧;
发送单元, 用于利用所述选择的下行子帧向终端发送所述 TPC命令。
12、 如权利要求 11所述的基站, 其特征在于, 所述选择单元包括: 标识单元, 用于在所述帧对应信息包括上行子帧标识与下行子帧标识的对 应关系时, 获取所述上行子帧的标识, 根据所述对应关系, 确定所述上行子帧 的标识对应的下行子帧标识;
第一确定单元, 用于将所述上行子帧之前的所述确定的下行子帧标识对应
13、 如权利要求 11所述的基站, 其特征在于, 所述选择单元包括: 参数单元, 用于在所述帧对应信息包括上行子帧标识与 TPC控制时延参 数值的对应关系时, 获取所述上行子帧的标识, 根据所述对应关系, 确定所述 上行子帧的标识对应的 TPC控制时延参数值;
第二确定单元, 用于确定在所述上行子帧之前、 并且与所述上行子帧的时 间间隔为所述确定的 TPC控制时延参数值大小的下行子帧, 将该下行子帧作 为向终端发送所述 TPC命令的子帧。
14、 一种终端, 其特征在于, 该终端包括:
信息单元, 用于在利用上行子帧传输数据前, 确定当前的上下行子帧分配 子帧单元, 用于根据所述帧对应信息确定发送所述上行子帧对应的功率控 制 TPC命令的下行子帧;
命令单元, 用于获取从所述确定的下行子帧接收到的 TPC命令; 功率单元, 用于根据所述 TPC命令确定利用所述上行子帧进行数据传输 的功率。
15、 如权利要求 14所述的终端, 其特征在于, 所述子帧单元包括: 第一获取单元, 用于在所述帧对应信息包括上行子帧标识与下行子帧标识 的对应关系时, 获取所述上行子帧的标识, 根据所述对应关系, 确定所述上行 子帧的标识对应的下行子帧标识;
第一结果单元, 用于将在所述上行子帧之前的所述确定的下行子帧标识对
16、 如权利要求 14所述的终端, 其特征在于, 所述子帧单元包括: 第二获取单元, 用于在所述帧对应信息包括上行子帧标识与 TPC控制时 延参数值的对应关系时, 获取所述上行子帧的标识; 根据所述对应关系, 确定 所述上行子帧的标识对应的 TPC控制时延参数值;
第二结果单元, 用于确定在所述上行子帧之前、 并且与所述上行子帧的时 间间隔为所述确定的 TPC控制时延参数值大小的下行子帧, 将该下行子帧作 为发送所述上行子帧对应的 TPC命令的子帧。
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