WO2013023521A1 - 终端发射上行信号的方法和终端 - Google Patents

终端发射上行信号的方法和终端 Download PDF

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Publication number
WO2013023521A1
WO2013023521A1 PCT/CN2012/079237 CN2012079237W WO2013023521A1 WO 2013023521 A1 WO2013023521 A1 WO 2013023521A1 CN 2012079237 W CN2012079237 W CN 2012079237W WO 2013023521 A1 WO2013023521 A1 WO 2013023521A1
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WO
WIPO (PCT)
Prior art keywords
uplink
power control
indication
base station
receiving
Prior art date
Application number
PCT/CN2012/079237
Other languages
English (en)
French (fr)
Inventor
李强
Original Assignee
华为技术有限公司
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 华为技术有限公司 filed Critical 华为技术有限公司
Priority to ES12824158T priority Critical patent/ES2701410T3/es
Priority to EP12824158.5A priority patent/EP2736291B1/en
Publication of WO2013023521A1 publication Critical patent/WO2013023521A1/zh
Priority to US14/183,158 priority patent/US10512042B2/en
Priority to US16/709,574 priority patent/US11343776B2/en

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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
    • H04W52/14Separate analysis of uplink or downlink
    • H04W52/146Uplink power control
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W52/00Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04TPC
    • H04W52/30TPC using constraints in the total amount of available transmission power
    • H04W52/32TPC of broadcast or control channels
    • H04W52/325Power control of control or pilot channels
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W52/00Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04TPC
    • H04W52/38TPC being performed in particular situations
    • H04W52/40TPC being performed in particular situations during macro-diversity or soft handoff
    • 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
    • H04W52/242TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters taking into account path loss
    • 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
    • H04W52/245TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters taking into account received signal strength
    • 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
    • H04W52/28TPC being performed according to specific parameters using user profile, e.g. mobile speed, priority or network state, e.g. standby, idle or non transmission
    • 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

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a method and a terminal for transmitting an uplink signal by a terminal, and a method and a base station for receiving an uplink signal transmitted by a terminal. Background technique
  • the mobile terminal In the uplink of the wireless communication system, that is, the link from the terminal to the base station, the mobile terminal, such as the user equipment (User Equipment, UE), needs to determine the power of the transmitted signal, which is the transmit power, so that the mobile terminal sends
  • the base station such as an Evolved Node B (eNB)
  • the transmit power of the uplink signal is obtained according to the maximum transmit power of the uplink, the measured path loss of the downlink, and the power value of the expected received signal of the base station notified by the serving base station, and the like
  • the power transmits an uplink signal to the base station.
  • the base station After receiving the uplink signal, the base station feeds back the closed loop power control compensation value to the mobile terminal, so that the mobile terminal adjusts the transmission power according to the closed loop power control compensation value.
  • the primary base station only one macro base station (ie, the primary base station) in each cell receives a signal transmitted by the served mobile terminal.
  • the uplink signal is separately received by the serving base station of the cell where the mobile terminal is located, and the uplink signal is transmitted.
  • the power only needs to be controlled to meet the power required for the serving base station to receive separately. That is, the power control of the uplink signal is aimed at making the power of the signal to the primary base station at a level suitable for reception by the primary base station.
  • a variety of needs For example, in a cell, there is not only one macro base station but also a plurality of micro base stations, which collectively cover the entire area.
  • the micro base station is used to cover the hot spot area.
  • a high-speed optical cable is connected between the macro base station and the micro base station to facilitate mutual information exchange between them.
  • the macro base station of the local cell performs joint reception with the macro base station of other cells.
  • the uplink signal may be received by different base station sets, and the control method of the existing uplink signal transmission power cannot meet the requirements of multiple receiving modes.
  • the SRS is an uplink reference signal transmitted by the terminal side to the base station side, and is used for measurement of a channel between the terminal and the base station. SRS can be used for both uplink channel measurements and downlink channel measurements.
  • the set of base stations to which the downlink signal is transmitted (herein referred to as set A) may be different from the set of base stations receiving the uplink signal (herein referred to as set B).
  • the set B receives the SRS, and the power control should be adjusted according to the receiving level of the set B. If the SRS is used for the downlink channel measurement, the set A receives the SRS, and the power control should Adjust according to the reception level of set A.
  • the prior art has only one power control flow, so it cannot meet the power requirements that multiple base stations jointly receive.
  • the time at which the terminal side transmits signals on the terminal side is controlled by the base station side to achieve the best reception effect.
  • the mobile terminal When the primary base station receives the signal transmitted by the served mobile terminal, the mobile terminal reserves a Time Advance (TA) value, and sends an uplink signal to the macro base station at the TA time.
  • TA Time Advance
  • Embodiments of the present invention provide a method and a terminal for transmitting an uplink signal by a terminal, and a method and a base station for receiving an uplink signal transmitted by a terminal, so as to meet different uplink power control requirements in multiple receiving modes.
  • the embodiment of the invention provides a method for a terminal to transmit an uplink signal, including:
  • the uplink signal is transmitted using the transmit power.
  • the embodiment of the invention further provides a terminal, including:
  • an indication receiving unit configured to receive an indication sent by the serving base station for determining the transmit power
  • a formula selection unit configured to select, according to the indication, a previous power control formula from the multiple uplink power control formulas
  • a transmit power acquiring unit configured to obtain a transmit power of the uplink signal by using the selected uplink power control formula
  • a transmitting unit configured to transmit an uplink signal by using the transmit power.
  • the embodiment of the present invention further provides a method for receiving an uplink signal transmitted by a terminal, including: selecting an uplink power control formula from a plurality of uplink power control formulas according to a receiving manner of receiving an uplink signal by the base station side;
  • the embodiment of the invention further provides a base station, including:
  • a formula selection unit configured to select an uplink power control formula from a plurality of uplink power control formulas according to a receiving manner of receiving an uplink signal by the base station side;
  • an indication unit configured to send, by using the selected uplink power control formula, an indication for determining a transmit power, where the indication is used to instruct the terminal to obtain a transmit power of the uplink signal by using the selected uplink power control formula;
  • An uplink signal receiving unit is configured to receive an uplink signal sent by the terminal.
  • a method and a terminal for transmitting an uplink signal by a terminal according to an embodiment of the present invention and a method and a base station for receiving an uplink signal transmitted by a terminal, and selecting an uplink power control formula from multiple uplink power control formulas according to an indication of a serving base station,
  • the terminal can not only determine the transmission signal according to the receiving mode, but also meet the power control requirements in different receiving modes, and can also use the corresponding uplink power control formula for different configuration parameters of the non-periodic SRS.
  • the transmit power transmits the uplink signal, which improves the flexibility of the terminal's uplink transmit power control and also improves the signal transmission performance of the terminal.
  • the embodiment of the invention further provides a method for a terminal to transmit an uplink signal, including:
  • the uplink signal is transmitted to the serving base station at an advanced time corresponding to the selected time advance value.
  • the embodiment of the invention further provides a terminal, including:
  • a time indication receiving unit configured to receive, by the serving base station, a finger for determining a time advance value The indication is determined by the serving base station according to the receiving manner of receiving the uplink signal by the base station side; the time selecting unit is configured to select a time advance value from the plurality of time advance values according to the indication;
  • a transmitting unit configured to send an uplink signal to the serving base station at an advanced time corresponding to the selected time advance value.
  • the embodiment of the present invention further provides a method for receiving an uplink signal transmitted by a terminal, including: selecting a time advance value from a plurality of time advance values according to a receiving manner of receiving an uplink signal by the base station side;
  • the embodiment of the invention further provides a base station, including:
  • a time selection unit configured to select a time advance value from the plurality of time advance values according to the receiving manner of receiving the uplink signal by the base station side;
  • an indication unit configured to send, according to the selected time advance value, an indication for determining a time advance value to the terminal, where the indication is used to instruct the terminal to transmit an uplink signal at an advanced time corresponding to the selected time advance value;
  • An uplink signal receiving unit is configured to receive an uplink signal sent by the terminal.
  • a method and a terminal for transmitting an uplink signal by the terminal and a method for receiving an uplink signal sent by the terminal, and a base station, by using a sending base station to notify the terminal to select a threshold according to the receiving manner of the base station side, so that the terminal
  • the uplink signal can be transmitted at an appropriate time, and the time control requirement of a new network topology such as multiple base stations sharing in one cell is satisfied.
  • FIG. 1 is a schematic diagram of a topology of a conventional cell
  • FIG. 2 is a schematic diagram of a topology of a heterogeneous network
  • FIG. 3 is a flowchart of a method for a terminal to transmit an uplink signal according to an embodiment of the present invention
  • FIG. 4 is a flowchart of another method for transmitting an uplink signal by a terminal according to an embodiment of the present invention
  • Schematic diagram of transmission and reception time
  • FIG. 6 is a schematic structural diagram of a terminal according to an embodiment of the present disclosure.
  • FIG. 7 is a schematic structural diagram of another terminal according to an embodiment of the present disclosure.
  • FIG. 8 is a schematic structural diagram of a base station according to an embodiment of the present disclosure.
  • FIG. 9 is a schematic structural diagram of another base station according to an embodiment of the present invention. detailed description
  • the uplink physical layer control channel (PUCCH), the uplink physical layer shared channel (PUSCH), and the uplink measurement reference signal (SRS) all need to determine the appropriate transmit power. Perform transmission to ensure that the uplink signal arrives at the base station The power is suitable for base station reception.
  • PUCCH physical layer control channel
  • PUSCH uplink physical layer shared channel
  • SRS uplink measurement reference signal
  • ⁇ ⁇ min ⁇ C 0
  • the UE Before transmitting the PUCCH, the UE determines the transmit power of the PUCCH according to the uplink power control formula (1), and then transmits the PUCCH with the determined transmit power.
  • P T min ⁇ max , ⁇ 0 + aPL DL + 10 log 10 (M) + ⁇ MCS +d ⁇ ( 2 )
  • P T , PP 0 , PL DL the meaning and the uplink power control formula (1) the same.
  • a is a path loss compensation coefficient, and the eNB notifies the UE; M allocates a bandwidth for the PUSCH, and the eNB notifies the UE;
  • is a compensation value adopted for a different modulation and coding order (MCS), and the eNB notifies the UE.
  • MCS modulation and coding order
  • P T min ⁇ C 0 + +10log 10 (D + 5 ⁇ (3)
  • P T , max , P, PL DL , o meaning and uplink power control formula (1)
  • uplink The power control formula (2) is the same; /1 5/?5 allocates bandwidth for the SRS, and the eNB notifies the UE; 5 is a configurable power compensation value for the SRS, and the eNB notifies the UE.
  • the UE first needs to determine the transmit power of the SRS according to the uplink power control formula (3) before transmitting the SRS.
  • the uplink signal is separately received by the serving base station, as shown in FIG. 1, determining the transmission power of the uplink signal, so that the uplink signal transmitted by the determined transmission power, the received power P R at the macro base station is suitable for reception. s level.
  • the uplink signal transmitted by the UE is received by the base station set A in some cases, and in other cases by the base station set B. Receive.
  • SRS if it is measured for the uplink channel, is received by the set of base stations receiving the uplink data of the terminal, and if it is measured for the downlink channel, it is received by the set of base stations transmitting the downlink data to the terminal.
  • the macro base station 1 is a primary base station in the cell, covering the entire cell, and the micro base station 2 is used to cover the hot spot area.
  • the UE performs uplink transmission.
  • the power control target is suitable when the uplink signal arrives at the micro base station 2; but when the UE moves to the B position, The macro base station 1 and the micro base station 2 jointly receive the uplink signals. At this time, the target of the power control is suitable for the joint reception of the micro base station 2 and the macro base station 1.
  • the power is still suitable for receiving, and the method for the mobile terminal to transmit the uplink signal is as shown in FIG. 3.
  • FIG. 3 is a flowchart of a method for a terminal to transmit an uplink signal according to an embodiment of the present invention. As shown in Figure 3, the method includes:
  • Step 31 Receive an indication sent by the serving base station to determine transmit power.
  • the indication may directly indicate which uplink power control formula is used by the terminal, and the indication may be determined by the serving base station according to the receiving manner of receiving the uplink signal by the base station side.
  • the indication may be aperiodic SRS Configuration parameters.
  • the configuration parameters are used to determine how to send the SRS, including the SRS period and time information, the frequency domain location, the bandwidth, the cyclic shift used by the SRS, the comb information, and the number of antennas of the SRS.
  • the receiving manner may include that the serving base station receives the information separately, and the serving base station receives the joint with other stations.
  • Step 32 Select an uplink power control formula from the plurality of uplink power control formulas according to the indication. Selecting an uplink power control formula from a plurality of uplink power control formulas that are completely independently configured from variables according to the indication; or selecting an uplink power control formula from multiple uplink power control formulas independently configured from the variable portion according to the indication Or selecting an uplink power control formula from a plurality of uplink power control formulas having the same variable but carrying different offset amounts according to the indication. For example, / ⁇ min ⁇ p max ,p. + + + (5 ⁇ , completely independent configuration is the number of such formulas, the values of each formula variable P-max, P_0, PL dl, delta, sigma are set independently, that is, the same variable in multiple formulas The values can be different.
  • Partially independent means, for example, several formulas use the same P-max, but the remaining variables are independently configured, that is, the remaining variables can be set separately in each formula, taking different values.
  • Step 33 Obtain a transmit power of the uplink signal by using the selected uplink power control formula.
  • Step 34 Use the transmit power to transmit an uplink signal.
  • one of the multiple uplink power control formulas is selected according to the indication of the serving base station.
  • the uplink power control formula enables the terminal to select not only the corresponding uplink power control formula according to the receiving mode to determine the transmitting signal, but also meets the power control requirements under different receiving modes, and can also use and configure parameters for different configuration parameters of the non-periodic SRS.
  • the corresponding uplink power control formula determines the appropriate transmit power to transmit the uplink signal, improves the flexibility of the terminal's uplink transmit power control, and improves the signal transmission performance of the terminal.
  • the above steps 31 to 34 can be performed by the terminal.
  • the process of obtaining the transmit power of the current uplink signal by using the selected uplink power control formula further comprising: receiving respective target received powers transmitted by the respective base stations for jointly receiving the uplink signals;
  • the transmit power of the uplink signal suitable for joint reception is obtained;
  • the terminal side uses N target powers PP 2 , ...,, ⁇ ⁇ transmitted by the N base stations.
  • mean() represents the average number in parentheses.
  • the process of obtaining the transmit power of the current uplink signal by using the selected uplink power control formula further comprising: receiving, by the serving base station, a target power value suitable for joint reception, where the target power value is jointly received by the uplink signal
  • Each base station negotiates to obtain; Using the selected uplink power control formula and the received target power value, the transmit power suitable for joint reception is obtained. That is, the target power applicable to the joint reception has been obtained by the base station side, and the manner of obtaining is the same as that of the terminal side described above.
  • the base station transmits the calculated result to the terminal.
  • the method for receiving an uplink signal sent by a terminal includes: selecting an uplink power control formula from a plurality of uplink power control formulas according to a receiving manner of receiving an uplink signal by a base station side;
  • the description in the foregoing method for transmitting a method sends an indication for determining a transmit power to a terminal, where the indication is used to instruct the terminal to obtain a transmit power of an uplink signal by using a selected uplink power control formula;
  • the indication for determining the transmission power is detailed in the description of the embodiment of the above transmission method.
  • the above steps are performed by the serving base station of the terminal transmitting the uplink signal.
  • the sending, to the terminal, the indication for determining the transmit power includes: sending, by the terminal, a downlink physical downlink control channel PDCCH, where the information bit preset in the downlink PDCCH is used as the indication or the downlink PDCCH
  • the DCI format is used as the indication.
  • the method for transmitting the uplink signal and receiving the uplink signal will be further described below with reference to the first embodiment to the fourth embodiment.
  • the scenario shown in FIG. 2 is used as an application environment for a method for a mobile terminal to transmit an uplink signal, where the mobile terminal is a UE, and the serving base station is a micro base station 2.
  • the UE sets a plurality of uplink power control formulas for each type of uplink signal, and the eNB determines an indication according to the receiving manner of the uplink signal, so that the UE selects a corresponding uplink power control formula to determine the transmit power of the uplink signal according to the indication determined by the eNB.
  • the uplink PUCCH two uplink power control formulas can be set in the UE:
  • ⁇ ⁇ 2 min p , ⁇ 0 , 2 + PL DL , 2 + ⁇ + ⁇ 2 ] ( 42 )
  • the uplink power control formula (41 ) is used when the micro base station 2 separately receives the uplink signal transmitted by the terminal, the UE determines the uplink transmit power PDCCH ⁇ ⁇ 1; uplink power control formula (42) is directed to a macro base station and micro base station receiving an uplink signal when the joint 2, for the UE to determine transmit power of an uplink PDCCH ⁇ ⁇ 2; 4 is a micro base station 2
  • the target power of the uplink PDCCH is separately received, that is, the power of the uplink PDCCH is expected to be received when the micro base station 2 receives the uplink signal separately;
  • is the target power of the joint reception, that is, the total reception expected when the macro base station 1 and the micro base station 2 jointly receive the uplink PDCCH Power; PL DL for path loss received separately, A.
  • the path loss for joint reception which is measured by the UE; it is the PUCCH format compensation value received separately, and is the PUCCH format compensation value of the joint reception, which are independently configured by the eNB; and the closed loop power control compensation value is The eNB performs independent control.
  • the UE After obtaining the transmit power of the uplink PDCCH by using the uplink power control formula (41) or the uplink power control formula (42), the UE transmits the uplink PDCCH by using the obtained transmit power.
  • the variables and ⁇ in each uplink power control formula in the UE are independently configured, and the UE is configured. versus. 2 Measurements are made separately, and there are two independent uplink power control formulas to determine A and .
  • the two uplink power control formulas are respectively set for the two receiving scenarios.
  • the eNB may first determine whether the uplink signal is received by the micro base station 2 or the primary base station 1 and the micro base station 2 jointly. Then, the downlink signaling is used to inform the UE which uplink power control formula to use to determine the transmit power of the uplink signal. The UE learns the applicable uplink power control formula according to the downlink signaling.
  • the eNB instructs the UE to acquire only the expected received power of the micro base station 2 and the path loss between the UE and the micro base station 2, and uses the uplink power control formula (41). ) Determining the transmit power of the uplink signal, and transmitting the uplink signal according to the determined transmit power; if the joint reception is performed, the eNB instructs the UE to determine, by using the uplink power control formula (42), the transmit power applicable to the joint reception of the primary base station 1 and the micro base station 2, and The uplink signal is transmitted at a determined transmit power.
  • an uplink power control formula suitable for individual reception and an uplink power control formula suitable for joint reception are also set in the UE.
  • the details are as follows:
  • ⁇ ⁇ 2 min ⁇ P max , P 0 , 2 + a 2 PL DL + 101og 10 ( 2 ) + A MCS 2 + ⁇ 2 ⁇ ( 52 )
  • the uplink power control formula (51 ) is suitable for individual reception, The uplink power control formula set by the micro base station 2 for receiving the uplink signal separately; the uplink power control formula (52) is suitable for joint reception, and is an uplink power control formula set for the case where the macro base station 1 and the micro base station 2 jointly receive the uplink signal.
  • the uplink power control formula (51), the uplink power control formula (52), A MCS , ⁇ are independent configurations; versus. 2 is measured by the macro base station 1 and the micro base station 2 respectively; A is determined by two separate closed loop power control processes, which are separately received and jointly received.
  • the eNB first determines whether the micro base station 2 receives the uplink signal separately or the primary base station 1 and the micro base station 2 jointly receive the uplink signal, and then informs the UE by using downlink signaling. Which uplink power control formula is used to determine the transmit power of the uplink PUSCH, and the UE selects a formula from the uplink power control formula (51) and the uplink power control formula (52) according to the downlink signaling, and obtains the transmit power by using the selected formula. The obtained transmit power transmits the uplink PUSCH
  • the UE For the uplink SRS, the UE also sets the power control for individual reception and the uplink power control formula for joint reception, as shown in the following uplink power control formula:
  • the uplink power control formula (61) is applicable to individual reception, and is an uplink power control formula set for the case where the micro base station 2 separately receives the uplink signal; the uplink power control formula (62) is applicable to joint reception, and is for the macro base station. 1 An uplink power control formula set in the case where the uplink signal is received in conjunction with the micro base station 2.
  • the uplink power control formula (61) and the uplink power control formula (62) and P SRS a are independently configured.
  • the PL PL DL , 2 is measured by the UE for the macro base station 1 and the micro base station 2, respectively, and is determined by two separate closed loop power control processes, which are received separately and jointly received.
  • the eNB before instructing the UE to send the uplink SRS, the eNB first determines whether the uplink signal is received by the micro base station 2 alone or jointly by the primary base station 1 and the micro base station 2, and then informs the UE which uplink power is used by downlink signaling.
  • the control formula is used to determine the transmit power of the uplink signal, and the UE obtains the corresponding parameter according to the downlink signaling to obtain the uplink SRS receiving mode, and then selects the uplink power control formula (61) and the uplink power control formula (62) according to the downlink signaling.
  • each uplink power control formula is only for independent closed loop control, and other variables of each uplink power control formula are made. Same configuration.
  • the uplink power control formula is used to determine the transmit power of the uplink PUCCH:
  • ⁇ ⁇ min ⁇ max , P. + PL DL + A Pormat + ⁇ 2 ) ( 72 ) It can be seen from the above-mentioned uplink power control formula (71) and the uplink power control formula (72) that The same configuration is the same in different uplink power control formulas, and the UE uses the same path loss estimation but each process independently performs closed-loop power control, that is, independent adjustment is performed, and each uplink power is made by closed-loop power control.
  • the ⁇ in the control formula is adjusted to a value suitable for its own receiving mode, that is, for different receiving modes, it is necessary to select an uplink power control formula corresponding to the value of ⁇ .
  • the eNB informs the UE which uplink power control formula to use to determine the transmit power of the uplink PDCCH, and the UE selects one of the uplink power control formula (71) and the uplink power control formula (72) according to the downlink signaling.
  • the uplink power control formula corresponding to the value of ⁇ is used to obtain the transmit power of the uplink PDCCH by using the selected uplink power control formula, thereby transmitting the uplink PDCCH.
  • the following uplink power control formula is used to determine the transmit power of the uplink signal:
  • ⁇ ⁇ ⁇ min ⁇ U. PL DL +101og 10 ( ) + ⁇ + ⁇ ( 81 )
  • the eNB informs the UE which uplink power control formula to use to determine the transmit power of the uplink PUSCH, and the UE selects one of the uplink power control formula (71) and the uplink power control formula (72) according to the downlink signaling.
  • the uplink power control formula corresponding to the value of ⁇ obtains the transmit power of the uplink PUSCH by using the selected uplink power control formula, thereby transmitting the uplink PUSCH.
  • each process independently performs closed-loop power control, that is, independent adjustment, and ⁇ in each uplink power control formula is adjusted to a value suitable for its own receiving mode by closed-loop power control, that is, for different receiving modes,
  • the uplink power control formula corresponding to the value of ⁇ is selected.
  • the eNB informs the UE which uplink power control formula to use to determine the transmit power of the uplink SRS, and the UE controls the formula from the uplink power according to the downlink signaling (91).
  • the uplink power control formula (92) selects an uplink power control formula corresponding to the value of ⁇ , and uses the selected uplink power control formula to obtain the transmit power of the uplink SRS, thereby transmitting the uplink SRS.
  • each UE is configured with multiple uplink power control formulas.
  • an uplink power control formula is used as a reference, and other uplink power control formulas are added with a compensation value on the reference. The offset is obtained.
  • two uplink power control formulas are set for the uplink PUCCH, and one uplink power control formula is used as a reference, and the power control formula (1) is as above.
  • the reference power that is, the uplink power control formula (1) is used to calculate the transmit power
  • the procedure is the offset value, that is, the offset amount.
  • This compensation value can be obtained by measuring the received power of the uplink signal. It can also be adjusted through higher layer signaling.
  • the UE selects a formula from two uplink power control formulas according to the indication of the serving base station to obtain the transmit power, and uses the obtained transmit power to transmit the uplink PDCCH.
  • a plurality of uplink power control formulas are respectively set for the uplink PUSCH and the uplink SRS, and the variables of the respective uplink power control formulas are the same but the offset amounts are different, and the transmission method is similar to the uplink PD CCH.
  • each of the uplink power control process formulas there are some variables, in the power control formula of the PUCCH as above, implicit, PL DL , and ⁇ , which should be understood by those skilled in the art as multiple uplink powers of each type of uplink signal.
  • Some or all of the above parameter variables in the control formula may adopt the same configuration, and the rest may be independently configured, or different uplink power control formulas may be formed, for example, each uplink power control formula is independent of each other, that is, each uplink power control
  • the values of the formulas are different, and the values are different, and the value of each of the uplink power control formulas is the same, ⁇ .
  • the value is also the same. The same is true for the uplink power control formula for the uplink PUSCH and the uplink SRS.
  • the mobile terminal is configured to transmit an uplink aperiodic SRS.
  • the aperiodic SRS is a special SRS.
  • the serving base station instructs the UE to transmit the aperiodic SRS, it first configures the configuration parameters of the multiple sets of aperiodic SRS for the mobile terminal. After that, the serving base station needs the mobile terminal to send the aperiodic SRS.
  • the downlink PDCCH is used, the mobile terminal is instructed to send the SRS, and the PDCCH is used to indicate which set of configuration parameters are used for transmission.
  • the value of the information bit is used to inform the mobile terminal of which set of configuration parameters to use to transmit the aperiodic SRS, or the mobile terminal is notified by using the downlink control information (DCI) format of the PDCCH.
  • DCI downlink control information
  • the mobile terminal is instructed by the serving base station to indicate which group to use.
  • a corresponding uplink power control formula is selected from multiple uplink power control formulas, and the transmit power of the aperiodic SRS is obtained by using the selected uplink power control formula, so that the obtained transmit power is transmitted in a non-periodic manner. SRS.
  • the aperiodic SRS has only one uplink power control formula, that is, regardless of which set of configuration parameters are used, the power control uses the same uplink power control formula.
  • the serving base station and the mobile terminal bind the configuration parameters of the aperiodic SRS to the corresponding uplink power control formula, and when the serving base station selects the configuration parameter of the aperiodic SRS, correspondingly selects the corresponding uplink power.
  • the control formula when the serving base station sends the configuration parameters to the mobile terminal, also indicates to the mobile terminal which uplink power control formula is selected. In this way, when the serving base station triggers the aperiodic SRS, the uplink power control formula is automatically selected as long as the selected configuration parameter is selected.
  • the mobile terminal uses the configuration parameter indicated by the serving base station to select a corresponding uplink power control formula from a plurality of uplink power control formulas to obtain a transmission power, thereby transmitting the aperiodic SRS.
  • uplink power control formulas there may be more than two uplink power control formulas for the uplink signal in the mobile terminal, such as joint reception by two base stations, joint reception of three base stations, joint reception of four base stations, and the like.
  • the uplink power control formula received separately has three uplink power control formulas, four uplink power control formulas, and five An uplink power control formula, and so on.
  • FIG. 4 is a flowchart of another method for a terminal to transmit an uplink signal according to an embodiment of the present invention. As shown in Figure 4, the method for the terminal to transmit the uplink signal includes:
  • Step 41 Receive an indication sent by the serving base station to determine a TA value, where the indication is determined by the serving base station according to a receiving manner of receiving an uplink signal by the base station side;
  • Step 42 Select one TA value from the plurality of TA values according to the indication;
  • Step 43 Send an uplink signal to the serving base station at an advanced time corresponding to the selected TA value.
  • the mobile terminal UE 1 when the base station side transmits a signal, the mobile terminal UE 1 that is closer to the base station will receive the signal after the T_p 1 time due to the propagation delay of the radio wave, and the mobile terminal UE2 will receive the time after the ⁇ _ ⁇ 2 time.
  • the signal Where ⁇ _ ⁇ 2 is greater than T_pl.
  • the mobile terminal UE1 When the mobile terminal transmits the uplink signal, the mobile terminal UE1 needs to transmit T-al in advance with respect to the time point of receiving the signal for the base station side to receive the appropriate time. For the mobile UE2, the advance amount is T-a2.
  • the terminal side retains a TA value. After the base station side specifies which subframe the mobile terminal is transmitting, the mobile terminal calculates the transmission time according to the TA value and transmits it at that time. For example, the base station side instructs the mobile terminal to send an uplink signal in the mth subframe, and then the mobile terminal first calculates, according to the receiving time of the downlink signal, that the signal transmitted at the beginning of the mth subframe is received by the terminal after the time T1. Then, the time at which the terminal sends the uplink signal is the time T1-TA.
  • the base station always measures the time when the uplink signal of the mobile terminal arrives at the base station, determines whether it is suitable for reception, and then informs the mobile terminal whether the TA value should be increased or decreased by the downlink signaling.
  • time control is also affected by the new network structure. For example, only one base station receives, the TA value should be selected as the time when the signal is sent to the base station, but if multiple base stations jointly receive, The selection of the TA value should be suitable for the joint reception of several base stations.
  • each mobile terminal maintains a plurality of TA values, each TA value is for one receiving mode, and when the base station side notifies the mobile terminal to transmit the uplink signal, the serving base station notifies the mobile terminal to select A suitable TA value.
  • the serving base station sends a notification to notify the mobile terminal according to the receiving manner of the base station side.
  • the terminal selects a TA value, so that the mobile terminal can transmit the uplink signal at an appropriate time, and satisfies the time control requirement of a new network topology such as multiple base stations sharing in one cell.
  • the method for receiving an uplink signal transmitted by a terminal includes: selecting a time advance value from a plurality of time advance values according to a receiving manner of receiving an uplink signal by a base station side;
  • the above operations may be performed by a serving base station of a terminal transmitting an uplink signal.
  • the base station notifies the mobile terminal to select a TA value according to the receiving manner of the base station side, so that the mobile terminal can transmit the uplink signal at an appropriate time, and satisfies a new network extension such as multiple coverage of multiple base stations in one cell.
  • the time control needs of the Park structure.
  • the foregoing program may be stored in a computer readable storage medium, and the program is executed when executed.
  • the foregoing steps include the steps of the foregoing method embodiments; and the foregoing storage medium includes: a medium that can store program codes, such as a ROM, a RAM, a magnetic disk, or an optical disk.
  • FIG. 6 is a schematic structural diagram of a terminal according to an embodiment of the present invention. As shown in FIG. 6, the terminal includes: an indication receiving unit 61, a formula selecting unit 62, a transmission power acquiring unit 63, and a transmitting unit 64.
  • the indication receiving unit 61 is configured to receive an indication sent by the serving base station for determining the transmit power.
  • the formula selecting unit 62 is configured to select an uplink power control formula from the multiple uplink power control formulas according to the indication; Use the selected uplink power control formula to get The transmit power of the previous uplink signal; the transmitting unit 64 is configured to transmit the uplink signal by using the obtained transmit power.
  • the indication received by the indication receiving unit 61 may be determined by the serving base station according to the manner in which the base station side receives the uplink signal.
  • the indication received by the indication receiving unit may be a configuration parameter of the aperiodic SRS.
  • the formula selection unit 62 is specifically configured to select an uplink power control formula from a plurality of uplink power control formulas that are completely independently configured from variables according to the indication;
  • the transmit power acquisition unit 63 may further include: a first power receiving subunit and a first power receiving subunit, where the first power receiving subunit is configured to receive respective target receiving powers transmitted by the respective base stations that jointly receive the uplink signals.
  • a first power acquisition subunit is configured to obtain a transmit power of an uplink signal suitable for joint reception by using a selected uplink power control formula and respective target received powers transmitted by the respective base stations;
  • a second power receiving subunit and a second power receiving subunit where the second power receiving subunit is configured to receive a target power value that is sent by the serving base station and is suitable for joint receiving, where the target power value is uplinked
  • the signals are jointly negotiated by the respective base stations; the second power acquisition subunit is configured to obtain the transmit power applicable to the joint reception by using the selected uplink power control formula and the received target power value.
  • the indication receiving unit 61 may include: a signaling receiving subunit and an indication determining subunit signaling receiving subunit, configured to receive a downlink PDCCH delivered by the serving base station; and an indication determining subunit, configured to: And determining, by using a preset information bit in the downlink PDCCH or a DCI format of the downlink PDCCH, an indication for determining a transmit power.
  • the terminal selects an uplink power control formula from the plurality of uplink power control formulas according to the indication of the serving base station by the formula selection unit, so that the terminal can not only determine the corresponding uplink power control formula according to the receiving mode to determine the transmitting signal, which is satisfied.
  • the power control requirements in different receiving modes, and different configuration parameters of the non-periodic SRS can also use the corresponding uplink power control formula to determine the appropriate transmit power to transmit the uplink signal, thereby improving the flexibility of the terminal uplink transmit power control. It also improves the signal transmission performance of the terminal.
  • FIG. 7 is a schematic structural diagram of another terminal according to an embodiment of the present invention.
  • the mobile terminal includes: a time indication receiving unit 71, a time selecting unit 72, and a transmitting unit 73.
  • the time indication receiving unit 71 is configured to receive, by the serving base station, an indication for determining a TA value as a time for transmitting an uplink signal, where the indication is determined by the serving base station according to a receiving manner of receiving an uplink signal by the base station side; And selecting a TA value from the plurality of TA values according to the indication; the transmitting unit 73 is configured to send an uplink signal to the serving base station at a timing when the TA value is advanced.
  • the terminal receives the TA value selected by the time selection unit according to the determined TA value indication sent by the serving base station according to the receiving mode, and transmits the uplink signal by the transmitting unit at the time when the selected TA value is advanced.
  • the terminal can enable the uplink signal to be transmitted at an appropriate time, and meets the time control requirement of a new network topology such as multiple base stations sharing in one cell.
  • FIG. 8 is a schematic structural diagram of a base station according to an embodiment of the present invention.
  • the base station includes: a formula selection unit 81, an indication unit 82, and an uplink signal reception unit 83.
  • the formula selection unit 81 is configured to select an uplink power control formula from multiple uplink power control formulas according to the receiving manner of receiving the uplink signal by the base station side;
  • the indicating unit 82 is configured to send, by using the selected uplink power control formula, an indication for determining a transmit power, where the indication is used to indicate that the terminal obtains a transmit power of an uplink signal by using a selected uplink power control formula;
  • the unit 82 may be specifically configured to send a downlink physical downlink control channel PDCCH to the terminal, where a preset information bit in the downlink PDCCH is used as the indication or a DCI format of the downlink PDCCH as the indication.
  • the uplink signal receiving unit 83 is configured to receive an uplink signal sent by the terminal.
  • the base station selects an uplink power control formula from multiple uplink power control formulas according to the receiving mode of the uplink signal received by the base station, and sends the uplink power control formula to the terminal through the indication unit, so that the terminal can not only select according to the receiving mode.
  • the corresponding uplink power control formula determines the transmit signal to meet the current power control requirements in different receiving modes, and can also use the corresponding uplink power control formula for different configuration parameters of the non-periodic SRS to determine an appropriate transmit power to transmit the uplink signal, and improve The flexibility of the terminal's uplink transmit power control also improves the signal transmission performance of the terminal.
  • FIG. 9 is a schematic structural diagram of another base station according to an embodiment of the present invention. As shown in FIG. 9, the base station includes: a time selection unit 91, an indication unit 92, and an uplink signal receiving unit 93.
  • the time selection unit 91 is configured to select a time advance (TA) value from the plurality of time advance values according to the receiving manner in which the base station side receives the uplink signal.
  • the indicating unit 92 is configured to send, according to the selected time advance value, the terminal for determining the time advance. And an indication of the value, the indication is used to indicate that the terminal transmits an uplink signal at an advanced time corresponding to the selected time advance value; and the uplink signal receiving unit 93 is configured to receive the uplink signal sent by the terminal.
  • TA time advance
  • the base station uses the time selection unit and the indication unit to notify the mobile terminal to select a TA value according to the receiving manner of the base station side, so that the mobile terminal can transmit the uplink signal at an appropriate time, and the multiple base stations in one cell are satisfied.
  • Co-covering time control requirements such as new network topology.

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Abstract

一种终端发射上行信号的方法和终端,方法包括:接收服务基站发送的用于确定发射功率的指示;根据所述指示从多个上行功率控制公式中选择一个上行功率控制公式;利用选择的上行功率控制公式得到上行信号的发射功率;利用所述发射功率发射上行信号。通过根据服务基站的指示从多个上行功率控制公式中选择一个上行功率控制公式,使得终端不仅能够根据接收方式选择相应的上行功率控制公式确定发射信号,满足当前不同接收方式下的功率控制需求,并且对于非周期SRS的不同配置参数也能够使用相应的上行功率控制公式,确定适合的发射功率发射上行信号,提高了终端的上行发射功率控制的灵活性及信号发射性能。

Description

终端发射上行信号的方法和终端
本申请要求于 2011 年 8 月 17 日提交中国专利局、 申请号为 201110235910.4、 发明名称为"终端发射上行信号的方法和终端"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
本发明涉及通信技术领域, 尤其涉及一种终端发射上行信号的方法和终 端, 以及一种接收终端发射的上行信号的方法及基站。 背景技术
在无线通信系统的上行链路, 即从终端到基站的链路中, 移动终端, 如用 户设备(User Equipment, UE ), 需要确定发送信号的功率, 该功率为发射功 率, 以使移动终端发送的信号在到达在基站, 如演进后的节点(Evolved Node B, eNB ) 时, 功率保持在适合基站接收的水平。 移动终端确定上行信号的发射功率时, 具体根据自身的最大发射功率、 测 量的下行的路径损耗及服务基站告知的该基站所期望接收信号的功率值等,得 到上行信号的发射功率, 并以此功率发射上行信号给基站。基站在接收到上行 信号后, 向该移动终端反馈闭环功率控制补偿值, 以使该移动终端根据闭环功 率控制补偿值调整发射功率。 现有技术中, 每个小区中只有一个宏基站(也就是主基站)接收所服务的 移动终端发送的信号,换句话说, 上行信号被移动终端所在小区的服务基站单 独接收,上行信号的发射功率也只需控制在满足服务基站单独接收所需的功率 的即可, 即上行信号的功率控制的目标是使信号到达主基站时的功率, 处于适 合主基站接收的水平。 随着技术发展,一些新的网络拓朴结构使得上行信号的功率控制不再能满 足各种需求。 如在一个小区内, 不仅有一个宏基站, 还有多个微基站, 共同覆 盖整个区域。 其中, 微基站用来覆盖热点区域。 宏基站与微基站之间有高速光 缆相连, 便于它们之间交互信息。
另外也可能是本小区的宏基站与其他小区的宏基站进行联合接收。
在移动终端进行上行信号传输时,该上行信号有可能被不同的基站集合进 行接收, 现有的上行信号的发射功率的控制方法无法满足多种接收方式的需 求。
例如, SRS的接收。 SRS是终端侧向基站侧发射的上行参考信号, 用于终 端与基站之间信道的测量。 SRS既可以用于上行信道的测量,也可以用于下行 信道的测量。 然而对于同一个终端, 给其发送下行信号的基站集合(这里称为 集合 A )与接收其上行信号的基站集合(这里称为集合 B )可以不相同。 这样
SRS如果是用来进行上行信道测量的, 则集合 B接收 SRS, 功控应该按照集 合 B的接收水平来调整, 而 SRS如果是用来进行下行信道测量的, 则集合 A 接收 SRS , 功控应该按照集合 A的接收水平来调整。 现有技术仅有一个功控 流程, 所以无法满足多个基站联合接收的功率需求。
另外, 类似地, 无线通信系统中, 终端侧上行发射信号的时间受基站侧控 制, 以达到最好的接收效果。 现有技术中, 在单一每个小区中只有一个宏基站
(也就是主基站)接收所服务的移动终端发送的信号时, 该移动终端保留有一 个时间提前( Time Advance, TA )值, 在该 TA时刻向该宏基站发送上行信号。
但是对于一个移动终端的上行信号有可能被多个基站联合接收的新的网 络拓朴结构,现有的上行信号的时间的控制方法无法满足多种接收方式的时间 控制需求。 发明内容
本发明实施例提出一种终端发射上行信号的方法和终端,以及一种接收终 端发射的上行信号的方法及基站,以满足多种接收方式下不同的上行功率控制 要求。
本发明实施例提供了一种终端发射上行信号的方法, 包括:
接收服务基站发送的用于确定发射功率的指示;
根据所述指示从多个上行功率控制公式中选择一个上行功率控制公式; 利用选择的上行功率控制公式得到上行信号的发射功率;
利用所述发射功率发射上行信号。
本发明实施例还提供了一种终端, 包括:
指示接收单元, 用于接收服务基站发送的用于确定发射功率的指示; 公式选择单元,用于根据所述指示从多个上行功率控制公式中选择一个上 行功率控制公式;
发射功率获取单元,用于利用选择的上行功率控制公式得到上行信号的发 射功率;
发射单元, 用于利用所述发射功率发射上行信号。
本发明实施例还提供了一种接收终端发射的上行信号的方法, 包括: 根据基站侧接收上行信号的接收方式从多个上行功率控制公式中选择一 个上行功率控制公式;
基于选择的上行功率控制公式向终端发送用于确定发射功率的指示,所述 指示用于指示所述终端利用选择的上行功率控制公式得到上行信号的发射功 率; 接收所述终端发送的上行信号。
本发明实施例还提供了一种基站, 包括:
公式选择单元,用于根据基站侧接收上行信号的接收方式从多个上行功率 控制公式中选择一个上行功率控制公式;
指示单元,用于基于选择的上行功率控制公式向终端发送用于确定发射功 率的指示,所述指示用于指示所述终端利用选择的上行功率控制公式得到上行 信号的发射功率;
上行信号接收单元, 用于接收所述终端发送的上行信号。
本发明实施例提供的终端发射上行信号的方法和终端,以及一种接收终端 发射的上行信号的方法及基站,通过根据服务基站的指示从多个上行功率控制 公式中选择一个上行功率控制公式,使得终端不仅能够根据接收方式选择相应 的上行功率控制公式确定发射信号, 满足当前不同接收方式下的功率控制需 求, 并且对于非周期 SRS 的不同配置参数也能够使用相应的上行功率控制公 式,确定适合的发射功率发射上行信号,提高了终端的上行发射功率控制的灵 活性, 也提高了终端的信号发射性能。
本发明实施例还提供了一种终端发射上行信号的方法, 包括:
接收服务基站发送的用于确定时间提前值的指示,所述指示由所述服务基 站根据基站侧接收上行信号的接收方式确定;
根据所述指示从多个时间提前值中选择一个时间提前值;
在选择的时间提前值对应的提前的时刻向所述服务基站发射上行信号。 本发明实施例还提供了一种终端, 包括:
时间指示接收单元, 用于接收服务基站发送的用于确定时间提前值的指 示, 所述指示由所述服务基站根据基站侧接收上行信号的接收方式确定; 时间选择单元,用于根据所述指示从多个时间提前值中选择一个时间提前 值;
发射单元,用于在选择的时间提前值对应的提前的时刻向所述服务基站发 射上行信号。
本发明实施例还提供了一种接收终端发射的上行信号的方法, 包括: 根据基站侧接收上行信号的接收方式从多个时间提前值中选择一个时间 提前值;
基于选择的时间提前值向终端发送用于确定时间提前值的指示,所述指示 用于指示所述终端在选择的时间提前值对应的提前的时刻发射上行信号; 接收所述终端发送的上行信号。
本发明实施例还提供了一种基站, 包括:
时间选择单元,用于根据基站侧接收上行信号的接收方式从多个时间提前 值中选择一个时间提前值;
指示单元,用于基于选择的时间提前值向终端发送用于确定时间提前值的 指示,所述指示用于指示所述终端在选择的时间提前值对应的提前的时刻发射 上行信号;
上行信号接收单元, 用于接收所述终端发送的上行信号。
本发明实施例提供的上述终端发射上行信号的方法和终端,以及一种接收 终端发射的上行信号的方法及基站,通过服务基站根据基站侧接收方式通过发 送指示通知终端选择一个 ΤΑ值, 使得终端能够在合适的时间发射上行信号, 满足了一个小区内有多个基站共同覆盖等新的网络拓朴结构的时间控制需求。 附图说明
为了更清楚地说明本发明实施例中的技术方案,下面将对实施例中所需要 使用的附图作简单地介绍,显而易见地, 下面描述中的附图仅仅是本发明的一 些实施例, 对于本领域普通技术人员来讲, 在不付出创造性劳动性的前提下, 还可以根据这些附图获得其他的附图。
图 1为传统小区的拓朴示意图;
图 2为异构网络的拓朴示意图;
图 3为本发明实施例提供的一种终端发射上行信号的方法的流程图; 图 4为本发明实施例提供的另一种终端发射上行信号的方法的流程图; 图 5为上下行信号的发射及接收时间示意图;
图 6为本发明实施例提供的一种终端的结构示意图;
图 7为本发明实施例提供的另一种终端的结构示意图;
图 8为本发明实施例提供的一种基站的结构示意图;
图 9为本发明实施例提供的另一种基站的结构示意图。 具体实施方式
下面将结合本发明实施例中的附图,对本发明实施例中的技术方案进行清 楚、 完整地描述, 显然, 所描述的实施例仅仅是本发明一部分实施例, 而不是 全部的实施例。基于本发明中的实施例, 本领域普通技术人员在没有作出创造 性劳动前提下所获得的所有其他实施例, 都属于本发明保护的范围。
在 LTE-A (长期演进的进一步演进)系统中, 对于上行信号: 上行物理层 控制信道(PUCCH )、 上行物理层共享信道(PUSCH )及上行测量参考信号 ( SRS )均需要确定适合的发射功率进行发射, 以保证上行信号到达基站时的 功率适合基站接收。
对于 PUCCH, UE通过下面的上行功率控制公式计算 PUCCH的发射功率: Ρτ = min{C0 + PLDL + Format + δ} ( 1 ) 其中, 为发射功率; max为 UE的最大发射功率 (UE发射功率不会超 过^ ax ); 为目标功率值, 也就是 eNB希望接收信号的功率值, 该数值由 eN B通知 UE; 为下行的路径损耗, 该值可以由 UE进行测量得到, 并且假设 下行路径损耗与上行路径损耗相同; 为对于不同格式的 PUCCH进行的 补偿值, 该值由 eNB通知 UE; δ为闭环功率控制补偿值, 由 eNB向 UE进行 指示, 相对于;^、 Format , eNB可以频繁的更改 , 以使 UE随时上调或下调 发射功率, 来达到快速功控的目的。
UE在发送 PUCCH之前, 根据上行功率控制公式( 1 )确定 PUCCH的发 射功率 , 然后以确定的发射功率 发射 PUCCH。
对于 PUSCH的功率控制使用以下的上行功率控制公式:
PT = min{^max , Ρ0 + aPLDL + 10 log10 (M) + ^MCS+d} ( 2 ) 其中, PT, P P0, PLDL, 的意义与上行功率控制公式(1 )相同。 a为路径损耗补偿系数, 由 eNB通知 UE; M为 PUSCH分配带宽, 由 eNB通 知 UE; Δ 为针对不同的调制编码阶数(MCS)采用的补偿值, 由 eNB通知 UE。 UE在发送 PUSCH之前首先需要根据上行功率控制公式( 2 )确定 PUSC H的发射功率 。
对于 SRS的功率控制使用以下的上行功率控制公式:
PT = min{C0 + +10log10(D + 5} (3) 其中, PT, max, P, PLDL, o, 的意义与上行功率控制公式(1)、 上行 功率控制公式(2 )相同; /1 5/?5为 SRS分配带宽, 由 eNB通知 UE; 5为针 对 SRS的一个可配置的功率补偿值, 由 eNB通知 UE。 UE在发送 SRS之前首 先需要根据上行功率控制公式( 3 )确定 SRS的发射功率 。
以上是对于上行信号被服务基站单独接收的情况下,如图 1所示,确定上 行信号的发射功率,使得以确定的发射功率 发射的上行信号,在宏基站处的 接收功率 PR处于适合接收的水平。
当一个小区之内有一个主基站和多个微基站时,对于 UE发射的上行信号, 在某些情况下由基站集合 A对该信号进行接收,而在其他情况下由基站集合 B 对该信号进行接收。 例如 SRS, 如果是针对上行信道测量的, 就由接收该终端 上行数据的基站集合来进行接收,如果是针对下行信道测量的, 就由给该终端 发送下行数据的基站集合来进行接收。 又例如图 2所示,宏基站 1是该小区内 的主基站, 覆盖整个小区, 而微基站 2用以覆盖热点区域。 UE进行上行的传 输, 当其位于 A位置时, 其接收信号仅由微基站 2进行接收, 那么功率控制 目标为上行信号到达微基站 2时功率合适为宜; 但是当 UE移动到 B位置时, 由宏基站 1与微基站 2对于上行信号进行联合接收,此时功率控制的目标是适 合微基站 2与宏基站 1联合接收。为了使移动终端发射的上行信号到达各接收 基站时的功率仍然适合接收, 移动终端发射上行信号的方法如图 3所示。
图 3为本发明实施例提供的一种终端发射上行信号的方法的流程图。如图 3所示, 该方法包括:
步骤 31、 接收服务基站发送的用于确定发射功率的指示;
所述指示可直接指示终端使用哪个上行功率控制公式,该指示可由服务基 站根据基站侧接收上行信号的接收方式确定。 或者所述指示可为非周期 SRS 的配置参数。 配置参数用来确定如何发送 SRS, 包括 SRS的周期与时间信息、 频域位置、 带宽、 SRS使用的循环移位、 梳齿信息、 以及 SRS的天线数等。 如接收所述服务基站下发的下行 PDCCH; 利用所述下行 PDCCH中预设的信 息位获知非周期 SRS的配置参数, 或者利用所述下行 PDCCH的 DCI格式获 知非周期 SRS的配置参数。 所述接收方式可以包括服务基站单独接收、 服务 基站与其它站点联合接收。
步骤 32、 根据所述指示从多个上行功率控制公式中选择一个上行功率控 制公式。如根据所述指示从变量完全独立配置的多个上行功率控制公式中选择 一个上行功率控制公式;或者如根据所述指示从变量部分独立配置的多个上行 功率控制公式中选择一个上行功率控制公式;或者如根据所述指示从变量相同 但携带有不同偏置量的多个上行功率控制公式中选择一个上行功率控制公式。 例如对于/^ min{pmax,p。+ + + (5} , 完全独立配置就是多个这样的公式中, 每 个公式变量 P— max, P_0, PL dl, delta, sigma的值分别独立设置, 即多个公式中 的相同的变量的值可以不同。
部分独立指,例如几个公式采用相同的 P— max,但是余下的变量独立配置, 即余下的变量在每个公式中可分别设置, 取不同的值。
不同偏置量, 就是多个公式中均有 /^ = minD + /^ f + <5} , 且该多个公 式中相同的变量的值相同, 另外, 该多个公式均增加了一个偏置量, 详见下述 实施例三中的说明。
步骤 33、 利用选择的上行功率控制公式得到上行信号的发射功率; 步骤 34、 利用所述发射功率发射上行信号。
本实施例中,通过根据服务基站的指示从多个上行功率控制公式中选择一 个上行功率控制公式,使得终端不仅能够根据接收方式选择相应的上行功率控 制公式确定发射信号, 满足当前不同接收方式下的功率控制需求, 并且对于非 周期 SRS 的不同配置参数也能够使用与配置参数相应的上行功率控制公式, 确定适合的发射功率发射上行信号, 提高了终端的上行发射功率控制的灵活 性, 也提高了终端的信号发射性能。 上述步骤 31〜步骤 34均可由终端执行。 利用选择的上行功率控制公式得到当前上行信号的发射功率的过程,还包 括: 接收对上行信号进行联合接收的各个基站发射的各自的目标接收功率; 冬寻
利用选择的上行功率控制公式及所述各个基站发射的各自的目标接收功 率, 得到适用于联合接收的上行信号的发射功率;
例如有 N个基站,其目标功率分别为 Pl Ρ2, ...,, ΡΝ, 而路损分别为 PL PL2、 ...PLN。 则终端侧利用 N个基站发送的 N个目标功率 P P2, ...,, ΡΝ
^ mean(Pl , P1 , - - - PN) # 率 计算得到 Ν 个基站联合接收的目标功專 并进一步利用如下上
N 行 功 率 控 制 公 式 进 行 计
Pr - 圏叭 ·Ρ
Figure imgf000012_0001
其中, mean()表示取括号内的平均数。 或者, 利用选择的上行功率控制公式得到当前上行信号的发射功率的过 程, 还包括: 接收所述服务基站发送的适用于联合接收的目标功率值,所述目标功率值 由对上行信号进行联合接收的各个基站协商得到; 利用选择的上行功率控制公式及接收到的目标功率值,得到适用于联合接 收的发射功率。 即适用于联合接收的目标功率已由基站侧得到,得到方式同上 述终端侧的计算。 基站将计算得到的结果发送给终端。
相应地, 本发明实施例提供的接收终端发射的上行信号的方法, 包括: 根据基站侧接收上行信号的接收方式从多个上行功率控制公式中选择一 个上行功率控制公式; 上行功率控制公式详见上述发射方法实施例中的说明 基于选择的上行功率控制公式向终端发送用于确定发射功率的指示,所述 指示用于指示所述终端利用选择的上行功率控制公式得到上行信号的发射功 率; 其中, 用于确定发射功率的指示详见上述发射方法实施例中的说明。
接收所述终端发送的上行信号。
上述步骤由发射上行信号的终端的服务基站执行。
可选地, 所述向终端发送的用于确定发射功率的指示包括: 所述向终端发 送下行物理下行控制信道 PDCCH, 所述下行 PDCCH中预设的信息位作为所 述指示或者所述下行 PDCCH的 DCI格式作为所述指示。
以下通过实施例一〜实施例四对发射上行信号及接收上行信号的方法做进 一步伴细说明。
实施例一
本实施例以图 2所示场景作为移动终端发射上行信号的方法的应用环境, 其中, 移动终端为 UE, 服务基站为微基站 2。
UE中为每类上行信号设置有多个上行功率控制公式, eNB根据上行信号 的接收方式确定指示, 以使 UE根据 eNB确定的指示, 选择相应的上行功率 控制公式来确定上行信号的发射功率。 例如, 对于上行 PUCCH, UE中可以设置两个上行功率控制公式:
Pn = min[P Ρ + PLDL, + APormat, + δλ ] ( 41 )
ΡΤ2 = min p , Ρ0,2 + PLDL,2 + Δ + δ2 ] ( 42 ) 其中, 上行功率控制公式(41 )是针对微基站 2单独接收终端发射的上行 信号时, 用于 UE确定上行 PDCCH的发射功率 ΡΤ1 ; 上行功率控制公式(42 )是 针对宏基站 1与微基站 2联合接收上行信号时, 用于 UE确定上行 PDCCH的发射 功率 ΡΤ2 ; 4是微基站 2单独接收上行 PDCCH的目标功率, 即微基站 2单独接收 上行信号时期望接收到上行 PDCCH的功率; ^是联合接收的目标功率, 即宏 基站 1与微基站 2联合接收上行 PDCCH时期望的总接收功率; PLDL 针对单独接 收的路径损耗, A。,2是针对联合接收的路径损耗,均由 UE测量得到; 是 单独接收的 PUCCH格式补偿值, 是联合接收的 PUCCH格式补偿值, 均 由 eNB进行独立配置; 与 是闭环功控补偿值, 由 eNB独立进行控制。
UE利用上述上行功率控制公式(41 )或上行功率控制公式(42 )得到上 行 PDCCH的发射功率后, 以得到的发射功率发射上行 PDCCH
本实施例中, UE中的每个上行功率控制公式中的变量 、 ^均进行独 立配置, UE对于 。 与 。 2分别进行测量, 并且有两个独立的上行功率控制 公式来决定 A与 。这样这两个上行功率控制公式分别是针对两个接收场景而 设置的, eNB指示 UE发射上行信号前, 可以首先判断上行信号是由微基站 2单 独接收还是由主基站 1与微基站 2联合接收, 然后通过下行信令告知 UE使用哪 一个上行功率控制公式确定上行信号的发射功率。 UE根据下行信令获知可采 用的上行功率控制公式, 若是单独接收, 则 eNB指示 UE仅获取微基站 2期望的 接收功率及 UE与微基站 2之间的路径损耗, 利用上行功率控制公式(41 )便可 确定上行信号的发射功率,并以确定的发射功率发射上行信号;若是联合接收, 则 eNB指示 UE利用上行功率控制公式(42)确定适用于主基站 1与微基站 2联 合接收的发射功率, 并以确定的发射功率发射上行信号。
对于上行 PUSCH, UE中也设置了适用于单独接收的上行功率控制公式和 适用于联合接收的上行功率控制公式。 具体如下上行功率控制公式所示:
Ρτι = min{u01 + a,PLDL l + 101og10( 1) + Δ +5,} ( 51 )
ΡΤ2 = min{Pmax,P0,2 + a2PLDL + 101og10( 2) + AMCS 2 + δ2} ( 52 ) 假设上行功率控制公式(51 )适用于单独接收, 是针对微基站 2单独接收 上行信号的情况设置的上行功率控制公式; 上行功率控制公式( 52 )适用于联 合接收,是针对宏基站 1与微基站 2联合接收上行信号的情况设置的上行功率控 制公式。 其中, 上行功率控制公式(51 ) 、 上行功率控制公式(52) 中的 、 AMCS , σ为独立配置; A。 与 。,2由1¾对宏基站 1和微基站 2分别进行测量得 到; A与 分别由单独接收及联合接收两个独立的闭环功率控制过程来决定。
针对两个接收场景即两种接收方式, eNB在指示 UE发送上行 PUSCH之前, 首先判断是由微基站 2单独接收还是由主基站 1与微基站 2联合接收上行信号, 然后通过下行信令告知 UE使用哪一个上行功率控制公式确定上行 PUSCH的发 射功率, 由 UE根据下行信令从上行功率控制公式(51 ) 、 上行功率控制公式 (52)中选择一个公式, 通过选择的公式得到发射功率, 利用得到的发射功率 发射上行 PUSCH
对于上行 SRS,UE中也设置了适用于单独接收的功率控制和适用于联合接 收的上行功率控制公式, 具体如下上行功率控制公式所示:
Ρτι = min{ Ρ0 + axPLDL X + 10 log10 (MSRS i ) + } ( 61 ) PT2 = minjF 尸。 ,2 + α2 2
Figure imgf000016_0001
( 62 ) 假设上行功率控制公式( 61 )适用于单独接收, 是针对微基站 2单独接收 上行信号的情况设置的上行功率控制公式; 上行功率控制公式( 62 )适用于联 合接收,是针对宏基站 1与微基站 2联合接收上行信号的情况设置的上行功率 控制公式。 其中, 上行功率控制公式(61 )、 上行功率控制公式(62 ) 中的 、 PSRS a、 为独立配置。 PL PLDL,2 由 UE对宏基站 1和微基站 2分别进行测 量, 与 由单独接收及联合接收两个独立的闭环功率控制过程来决定。
针对两个接收场景, eNB在指示 UE发送上行 SRS之前, 首先判断上行 信号是由微基站 2单独接收还是由主基站 1与微基站 2联合接收,然后通过下 行信令告知 UE使用哪一个上行功率控制公式来确定上行信号的发射功率, 由 UE根据下行信令获取相应参数, 得到上行 SRS的接收方式, 然后根据下行信 令从上行功率控制公式(61 )、 上行功率控制公式(62 ) 中选择一个公式, 利 用选择的公式得到发射功率, 以得到的发射功率发射上行 SRS
实施例二
与实施例一类似, UE中, 针对每类上行信号均设置有多个上行功率控制 公式,但是每个上行功率控制公式仅仅是进行独立的闭环控制, 而每个上行功 率控制公式的其他变量做相同配置。
如对于上行 PUCCH, 采用下面上行功率控制公式确定上行 PUCCH的发射 功率:
Pn ^ minj ^ , P0 + PLDL + APormat + δ, } ( 71 )
ΡΤ = min{ max , P。 + PLDL + APormat + δ2 ) ( 72 ) 由上述上行功率控制公式(71 )、 上行功率控制公式(72 )可以看出, 对 于不同的上行功率控制公式中的 、 作相同的配置相同, 并且让 UE使用 相同的路损估计 但是每个过程独立进行闭环功控, 即 与 进行独立调 整, 通过闭环功率控制使得每个上行功率控制公式中的 δ调整到适合自己的接 收方式的值, 即对于不同的接收方式, 需要选择 δ的值对应的上行功率控制公 式。 同样 eNB在指示 UE发射上行 PDCCH前, 告知 UE使用哪一个上行功率控制 公式确定上行 PDCCH的发射功率, UE根据下行信令从上行功率控制公式 (71 )、 上行功率控制公式(72)中选择一个 δ的值对应的上行功率控制公式, 利用选择的上行功率控制公式得到发射上行 PDCCH的发射功率, 以此发射上 行 PDCCH。
对于上行 PUSCH, 采用下面的上行功率控制公式确定上行信号的发射功 率:
ΡΤχ =min{U。 PLDL +101og10( ) + Δ^+^} ( 81 )
PT2 = min{ max ,P0+a PLDL +101og10( ) + AMCS+S2} ( 82) 由上述上行功率控制公式(81 )、 上行功率控制公式(82) 可以看出, 不 同的上行功率控制公式中 , a , Awc?的配置相同, 并且 UE使用相同的路损估 i PLDL , 但是每个过程独立进行闭环功控, 即 A与 进行独立调整, 通过闭环 功率控制使得每个上行功率控制公式中的 δ调整到适合自己的接收方式的值, 即对于不同的接收方式, 需要选择 δ的值对应的上行功率控制公式。 同样 eNB 在指示 UE发射上行 PUSCH前,告知 UE使用哪一个上行功率控制公式确定上行 PUSCH的发射功率, UE根据下行信令从上行功率控制公式(71 ) 、 上行功率 控制公式(72) 中选择一个 δ的值对应的上行功率控制公式, 利用选择的上行 功率控制公式得到发射上行 PUSCH的发射功率, 以此发射上行 PUSCH。 对于上行 SRS, 采用下面的上行功率控制公式确定上行信号的发射功率: Ρτι = mind,尸。 + " PLDL + 10 log10 (MSRS ) + Sl+PSRS} (91 ) ΡΤ2 = min{ ,P0 +a PLDL + 10 log10 (MSRS ) + S2 + PSRS } ( 92 ) 由上述上行功率控制公式(81)、 上行功率控制公式(82) 可以看出, 对 于不同的上行功率控制公式中的 , o, ^作相同的配置, 并且 UE使用相 同的路损估计 。,但是每个过程独立进行闭环功控,即 与 进行独立调整, 通过闭环功率控制使得每个上行功率控制公式中的 δ调整到适合自己的接收 方式的值,即对于不同的接收方式,需要选择 δ的值对应的上行功率控制公式。 同样 eNB在指示 UE发射上行 SRS前, 告知 UE使用哪一个上行功率控制公 式确定上行 SRS的发射功率, UE根据下行信令从上行功率控制公式(91 )、 上行功率控制公式(92)中选择一个 δ的值对应的上行功率控制公式, 利用选 择的上行功率控制公式得到发射上行 SRS的发射功率, 以此发射上行 SRS 实施例三
本实施例相对于前两个实施例进行进一步简化。 本实施例中, 每个 UE设 置有多个上行功率控制公式, 这些上行功率控制公式中, 以一个上行功率控制 公式作为基准,其他上行功率控制公式则通过在该基准上加上一个补偿值即偏 置量得到。
例如 UE中对上行 PUCCH设置有两个上行功率控制公式, 其中一个上行功 率控制公式为基准, 如上行功率控制公式(1 ) 。 假设利用该基准, 即上行功 率控制公式( 1 )计算出发射功率为 则另一个上行功率控制公式就是在上 行功率控制公式 ( 1 )基 上加一个补偿值, 即 ΡΤΪ = Ρτχ + Aprocedure。 其中 procedure 为补偿值也即偏置量。 这个补偿值可通过对上行信号接收功率的测量得到的, 也可以通过高层信令进行调整。
UE根据服务基站的指示从两个上行功率控制公式中选择一个公式来得到 发射功率, 利用得到的发射功率发射上行 PDCCH。
类似地,对于上行 PUSCH与上行 SRS也分别设置有多个上行功率控制公 式, 各个上行功率控制公式的变量相同但偏置量不同, 发射方法类似上行 PD CCH。
在每个上行功率控制过程公式中, 都有一些变量, 如上行 PUCCH的功率 控制公式中的 ,、 隱 、 PLDL 、 , δ , 本领域技术人员应理解为每类上行信 号的多个上行功率控制公式中的以上参数变量中的部分或全部可采用相同的 配置, 其余采用独立配置, 也可以形成不同的上行功率控制公式, 例如各个上 行功率控制公式的 、 相互独立,即每个上行功率控制公式的 值不同, 值 也不同, 而每个上行功率控制公式的 ^^值相同, Α。的值也相同。 对于上 行 PUSCH与上行 SRS的上行功率控制公式也是如此。
实施例四
本实施例中, 移动终端用于发射上行非周期性 SRS。 非周期性 SRS是一种 特殊的 SRS, 服务基站在指示 UE发射非周期性 SRS之前, 会首先为移动终端配 置多组非周期 SRS的配置参数,此后,当服务基站需要移动终端发送非周期 SRS 时, 会通过下行 PDCCH, 指示移动终端发送 SRS , 并且利用 PDCCH指明采用 哪一组配置参数进行发送。 如在 PDCCH中增加一个信息位, 利用该信息位的 值告知移动终端采用哪一组配置参数发射非周期性 SRS , 或者如利用 PDCCH 的下行控制信息 ( Downlink Control Information: DCI )格式告知移动终端采用 哪一组配置参数发射非周期性 SRS。 移动终端得到服务基站指示采用哪一组配 置参数发射非周期性 SRS后, 从多个上行功率控制公式中选择一个对应的上行 功率控制公式, 利用选择的上行功率控制公式得到非周期性 SRS的发射功率, 以得到的发射功率发射非周期性 SRS。
通常, 非周期性 SRS只有一个上行功率控制公式, 即不论采用哪一组配置 参数, 其功率控制采用的都是相同的上行功率控制公式。
本实施例中, 服务基站及移动终端将非周期性 SRS 的配置参数与相应的 上行功率控制公式绑定, 在服务基站选择非周期性 SRS 的配置参数时, 相应 地也选择了对应的上行功率控制公式,当服务基站将配置参数发送给移动终端 时, 也就向移动终端指出了选用哪个上行功率控制公式。 这样, 服务基站在触 发非周期性 SRS 时, 只要选择使用哪组配置参数就自动选择了上行功率控制 公式。移动终端利用服务基站指示的配置参数从多个上行功率控制公式中选择 一个对应的上行功率控制公式得到发射功率, 以此发射非周期性 SRS。
本领域技术人员应理解为:移动终端中对于上行信号也可以有两个以上的 上行功率控制公式, 如当联合接收有两个基站联合接收、 三个基站联合接收、 四个基站联合接收等等,针对每个联合连接都有一个不同的上行功率控制公式 用来确定上行信号的发射功率,从而加上单独接收的上行功率控制公式共有三 个上行功率控制公式、四个上行功率控制公式、五个上行功率控制公式,等等。
图 4为本发明实施例提供的另一种终端发射上行信号的方法的流程图。如 图 4所示, 终端发射上行信号的方法包括:
步骤 41、接收服务基站发送的用于确定 TA值的指示, 所述指示由所述服 务基站根据基站侧接收上行信号的接收方式确定;
步骤 42、 根据所述指示从多个 TA值中选择一个 TA值; 步骤 43、 在选择的 TA值对应的提前的时刻向所述服务基站发射上行信 号。
如图 5所示, 基站侧发送信号时, 由于电波的传播时延, 离基站较近的移 动终端 UE 1 , 将在 T_p 1时间后接收到该信号, 移动终端 UE2将在 Τ_ρ2时间 后接收到该信号。 其中, Τ_ρ2大于 T_pl。
移动终端发送上行信号时, 为了基站侧接收时间合适, 移动终端 UE1 需 要相对于接收信号的时间点提前 T— al发送, 对于移动 UE2 而言, 提前量是 T— a2。
具体地, 终端侧保留有一个 TA值。 在基站侧指定移动终端在哪个子帧进 行传输后, 移动终端会根据 TA值, 计算发送时间, 并在该时间进行发送。 例 如: 基站侧指示移动终端在第 m子帧发送上行信号, 那么移动终端首先根据 下行信号的接收时间,计算出在第 m子帧的开端传输的信号将在 T1时刻后被 该终端接收到, 那么终端发送上行信号的时间就是 T1-TA这个时刻。
基站会一直测量移动终端上行信号到达基站的时间, 判断是否适合接收, 然后通过下行信令告知移动终端应该增加 TA值还是减少 TA值。
与之前功率控制一样, 时间控制也受到了新的网络结构的影响, 例如只是 一个基站接收, 则 TA值应该选择为信号到这个基站的时间合适为宜, 但是如 果是多个基站联合接收, 则 TA值的选择应该是几个基站联合接收合适为宜。
与上述上行信号发射功率控制类似地, 为每个移动终端维护多个 TA值, 每个 TA值针对一种接收方式,基站侧在通知移动终端进行上行信号的发射时, 服务基站通知移动终端选择一个合适的 TA值。
本实施例中 ,通过服务基站根据基站侧接收方式通过发送指示通知移动终 端选择一个 TA值, 使得移动终端能够在合适的时间发射上行信号, 满足了一 个小区内有多个基站共同覆盖等新的网络拓朴结构的时间控制需求。
相应地, 本发明实施例提供的接收终端发射的上行信号的方法包括: 根据基站侧接收上行信号的接收方式从多个时间提前值中选择一个时间 提前值;
基于选择的时间提前值向终端发送用于确定时间提前值的指示,所述指示 用于指示所述终端在选择的时间提前值对应的提前的时刻发射上行信号; 接收所述终端发送的上行信号。
上述操作可由发射上行信号的终端的服务基站执行。
本实施例中,基站根据基站侧接收方式通过发送指示通知移动终端选择一 个 TA值, 使得移动终端能够在合适的时间发射上行信号, 满足了一个小区内 有多个基站共同覆盖等新的网络拓朴结构的时间控制需求。
本领域普通技术人员可以理解:实现上述方法实施例的全部或部分步骤可 以通过程序指令相关的硬件来完成,前述的程序可以存储于一计算机可读取存 储介质中, 该程序在执行时, 执行包括上述方法实施例的步骤; 而前述的存储 介质包括: ROM、 RAM, 磁碟或者光盘等各种可以存储程序代码的介质。
图 6为本发明实施例提供的一种终端的结构示意图。如图 6所示, 终端包 括: 指示接收单元 61、 公式选择单元 62、 发射功率获取单元 63及发射单元 64。
指示接收单元 61用于接收服务基站发送的用于确定发射功率的指示; 公 式选择单元 62用于根据所述指示从多个上行功率控制公式中选择一个上行功 率控制公式; 发射功率获取单元 63用于利用选择的上行功率控制公式得到当 前上行信号的发射功率; 发射单元 64用于利用得到的所述发射功率发射上行 信号。
所述指示接收单元 61接收的指示可由服务基站根据基站侧接收上行信号 的接收方式确定。 所述指示接收单元接收的指示可为非周期 SRS的配置参数。
所述公式选择单元 62具体用于根据所述指示从变量完全独立配置的多个 上行功率控制公式中选择一个上行功率控制公式;
或者,具体用于根据所述指示从变量部分独立配置的多个上行功率控制公 式中选择一个上行功率控制公式;
或者 ,具体用于根据所述指示从变量相同但携带有不同偏置量的多个上行 功率控制公式中选择一个上行功率控制公式。
所述发射功率获取单元 63还可包括: 第一功率接收子单元及第一功率获 取子单元,第一功率接收子单元用于接收对上行信号进行联合接收的各个基站 发射的各自的目标接收功率;第一功率获取子单元用于利用选择的上行功率控 制公式及所述各个基站发射的各自的目标接收功率,得到适用于联合接收的上 行信号的发射功率;
或者还包括: 第二功率接收子单元及第二功率获取子单元, 第二功率接收 子单元用于接收所述服务基站发送的适用于联合接收的目标功率值,所述目标 功率值由对上行信号进行联合接收的各个基站协商得到;第二功率获取子单元 用于利用选择的上行功率控制公式及接收到的目标功率值,得到适用于联合接 收的发射功率。
所述指示接收单元 61可包括: 信令接收子单元及指示确定子单元信令接 收子单元用于接收所述服务基站下发的下行 PDCCH; 指示确定子单元, 用于 利用所述下行 PDCCH中预设的信息位或者所述下行 PDCCH的 DCI格式获知 用于确定发射功率的指示。
上述终端实施例中,终端通过公式选择单元根据服务基站的指示从多个上 行功率控制公式中选择一个上行功率控制公式,使得终端不仅能够根据接收方 式选择相应的上行功率控制公式确定发射信号,满足当前不同接收方式下的功 率控制需求, 并且对于非周期 SRS 的不同配置参数也能够使用相应的上行功 率控制公式,确定适合的发射功率发射上行信号,提高了终端的上行发射功率 控制的灵活性, 也提高了终端的信号发射性能。
图 7为本发明实施例提供的另一种终端的结构示意图。如图 7所示,移动 终端包括: 时间指示接收单元 71、 时间选择单元 72及发射单元 73。
时间指示接收单元 71用于接收服务基站发送的用于确定 TA值作为发射 上行信号的时间的指示,所述指示由所述服务基站根据基站侧接收上行信号的 接收方式确定; 时间选择单元 72用于根据所述指示从多个 TA值中选择一个 TA值; 发射单元 73用于在所述 TA值提前的时刻向所述服务基站发射上行信 号。 具体详见上述图 4所示实施例中的说明。
本实施例中,终端通过时间指示接收单元接收服务基站根据接收方式发送 的确定的 TA值指示, 通过时间选择单元选择的 TA值, 并通过发射单元在选 择的 TA值提前的时刻发射上行信号, 使得终端能够在合适的时间发射上行信 号,满足了一个小区内有多个基站共同覆盖等新的网络拓朴结构的时间控制需 求。
图 8为本发明实施例提供的一种基站的结构示意图。如图 8所示,基站包 括: 公式选择单元 81、 指示单元 82及上行信号接收单元 83。 公式选择单元 81用于根据基站侧接收上行信号的接收方式从多个上行功 率控制公式中选择一个上行功率控制公式;
指示单元 82用于基于选择的上行功率控制公式向终端发送用于确定发射 功率的指示,所述指示用于指示所述终端利用选择的上行功率控制公式得到上 行信号的发射功率; 如所述指示单元 82可具体用于向终端发送下行物理下行 控制信道 PDCCH, 所述下行 PDCCH中预设的信息位作为所述指示或者所述 下行 PDCCH的 DCI格式作为所述指示。
上行信号接收单元 83用于接收所述终端发送的上行信号。
本实施例中,基站通过公式选择单元根据基站侧接收上行信号的接收方式 从多个上行功率控制公式中选择一个上行功率控制公式,并通过指示单元发送 给终端,使得终端不仅能够根据接收方式选择相应的上行功率控制公式确定发 射信号, 满足当前不同接收方式下的功率控制需求, 并且对于非周期 SRS 的 不同配置参数也能够使用相应的上行功率控制公式,确定适合的发射功率发射 上行信号,提高了终端的上行发射功率控制的灵活性,也提高了终端的信号发 射性能。
图 9为本发明实施例提供的另一种基站的结构示意图。如图 9所示,基站 包括: 时间选择单元 91、 指示单元 92及上行信号接收单元 93。
时间选择单元 91用于根据基站侧接收上行信号的接收方式从多个时间提 前值中选择一个时间提前 ( TA )值; 指示单元 92用于基于选择的时间提前值 向终端发送用于确定时间提前值的指示,所述指示用于指示所述终端在选择的 时间提前值对应的提前的时刻发射上行信号; 上行信号接收单元 93用于接收 所述终端发送的上行信号。 本实施例中,基站通过时间选择单元及指示单元根据基站侧接收方式通过 发送指示通知移动终端选择一个 TA值, 使得移动终端能够在合适的时间发射 上行信号,满足了一个小区内有多个基站共同覆盖等新的网络拓朴结构的时间 控制需求。
最后应说明的是: 以上实施例仅用以说明本发明的技术方案, 而非对其限 制; 尽管参照前述实施例对本发明进行了详细的说明, 本领域的普通技术人员 应当理解: 其依然可以对前述各实施例所记载的技术方案进行修改, 或者对其 中部分技术特征进行等同替换; 而这些修改或者替换, 并不使相应技术方案的 本质脱离本发明各实施例技术方案的精神和范围。例如, 本发明实施例中以移 动终端为例进行介绍, 但实际上上述方案也能适用于固定终端。

Claims

权 利 要 求
1、 一种终端发射上行信号的方法, 其特征在于, 包括:
接收服务基站发送的用于确定发射功率的指示;
根据所述指示从多个上行功率控制公式中选择一个上行功率控制公式; 利用选择的上行功率控制公式得到上行信号的发射功率;
利用所述发射功率发射上行信号。
2、 根据权利要求 1所述的方法, 其特征在于, 所述指示由服务基站根据 基站侧接收上行信号的接收方式确定。
3、 根据权利要求 1或 2所述的方法, 其特征在于, 所述指示为非周期测 量参考信号 SRS的配置参数。
4、 根据权利要求 1至 3中任一项所述的方法, 其特征在于, 根据所述指 示从多个上行功率控制公式中选择一个上行功率控制公式, 包括:
根据所述指示从变量完全独立配置的多个上行功率控制公式中选择一个 上行功率控制公式;
或者包括:
根据所述指示从变量部分独立配置的多个上行功率控制公式中选择一个 上行功率控制公式;
或者包括:
根据所述指示从变量相同但携带有不同偏置量的多个上行功率控制公式 中选择一个上行功率控制公式。
5、 根据权利要求 1-4任一项所述的方法, 其特征在于, 利用选择的上行 功率控制公式得到当前上行信号的发射功率, 还包括: 接收对上行信号进行联合接收的各个基站发射的各自的目标接收功率; 利用选择的上行功率控制公式及所述各个基站发射的各自的目标接收功 率, 得到适用于联合接收的上行信号的发射功率;
或者还包括:
接收所述服务基站发送的适用于联合接收的目标功率值,所述目标功率值 由对上行信号进行联合接收的各个基站协商得到;
利用选择的上行功率控制公式及接收到的目标功率值,得到适用于联合接 收的发射功率。
6、 根据权利要求 1-5任一项所述的方法, 其特征在于, 接收服务基站发 送的用于确定发射功率的指示, 包括:
接收所述服务基站下发的下行物理下行控制信道 PDCCH;
利用所述下行 PDCCH中预设的信息位获知用于确定发射功率的指示,或 者利用所述下行 PDCCH的 DCI格式获知用于确定发射功率的指示。
7、 一种终端, 其特征在于, 包括:
指示接收单元, 用于接收服务基站发送的用于确定发射功率的指示; 公式选择单元,用于根据所述指示从多个上行功率控制公式中选择一个上 行功率控制公式;
发射功率获取单元,用于利用选择的上行功率控制公式得到上行信号的发 射功率;
发射单元, 用于利用所述发射功率发射上行信号。
8、 根据权利要求 7所述的终端, 其特征在于, 所述公式选择单元用于根 据所述指示从变量完全独立配置的多个上行功率控制公式中选择一个上行功 率控制公式;
或者,具体用于根据所述指示从变量部分独立配置的多个上行功率控制公 式中选择一个上行功率控制公式;
或者 ,具体用于根据所述指示从变量相同但携带有不同偏置量的多个上行 功率控制公式中选择一个上行功率控制公式。
9、 根据权利要求 7或 8所述的终端, 其特征在于, 所述发射功率获取单 元还包括:
第一功率接收子单元,用于接收对上行信号进行联合接收的各个基站发射 的各自的目标接收功率;
第一功率获取子单元,用于利用选择的上行功率控制公式及所述各个基站 发射的各自的目标接收功率, 得到适用于联合接收的上行信号的发射功率; 或者还包括:
第二功率接收子单元,用于接收所述服务基站发送的适用于联合接收的目 标功率值, 所述目标功率值由对上行信号进行联合接收的各个基站协商得到; 第二功率获取子单元,用于利用选择的上行功率控制公式及接收到的目标 功率值, 得到适用于联合接收的发射功率。
10、 根据权利要求 7-9任一项所述的终端, 其特征在于, 所述指示接收单 元包括:
信令接收子单元, 用于接收所述服务基站下发的下行 PDCCH;
指示确定子单元,用于利用所述下行 PDCCH中预设的信息位或者所述下 行 PDCCH中的 DCI格式获知用于确定发射功率的指示。
11、 一种接收终端发射的上行信号的方法, 其特征在于, 包括: 根据基站侧接收上行信号的接收方式从多个上行功率控制公式中选择一 个上行功率控制公式;
基于选择的上行功率控制公式向终端发送用于确定发射功率的指示,所述 指示用于指示所述终端利用选择的上行功率控制公式得到上行信号的发射功 率;
接收所述终端发送的上行信号。
12、 根据权利要求 11所述的方法, 其特征在于, 所述向终端发送的用于 确定发射功率的指示包括: 所述向终端发送下行物理下行控制信道 PDCCH, 所述下行 PDCCH中预设的信息位作为所述指示或者所述下行 PDCCH的 DCI 格式作为所述指示。
13、 一种基站, 其特征在于, 包括:
公式选择单元,用于根据基站侧接收上行信号的接收方式从多个上行功率 控制公式中选择一个上行功率控制公式;
指示单元,用于基于选择的上行功率控制公式向终端发送用于确定发射功 率的指示,所述指示用于指示所述终端利用选择的上行功率控制公式得到上行 信号的发射功率;
上行信号接收单元, 用于接收所述终端发送的上行信号。
14、 根据权利要求 13所述的基站, 其特征在于, 所述指示单元具体用于 向终端发送下行物理下行控制信道 PDCCH, 所述下行 PDCCH中预设的信息 位作为所述指示或者所述下行 PDCCH的 DCI格式作为所述指示。
15、 一种终端发射上行信号的方法, 其特征在于, 包括:
接收服务基站发送的用于确定时间提前值的指示,所述指示由所述服务基 站根据基站侧接收上行信号的接收方式确定;
根据所述指示从多个时间提前值中选择一个时间提前值;
在选择的时间提前值对应的提前的时刻向所述服务基站发射上行信号。
16、 一种终端, 其特征在于, 包括:
时间指示接收单元, 用于接收服务基站发送的用于确定时间提前值的指 示, 所述指示由所述服务基站根据基站侧接收上行信号的接收方式确定; 时间选择单元,用于根据所述指示从多个时间提前值中选择一个时间提前 值;
发射单元,用于在选择的时间提前值对应的提前的时刻向所述服务基站发 射上行信号。
17、 一种接收终端发射的上行信号的方法, 其特征在于, 包括: 根据基站侧接收上行信号的接收方式从多个时间提前值中选择一个时间 提前值;
基于选择的时间提前值向终端发送用于确定时间提前值的指示,所述指示 用于指示所述终端在选择的时间提前值对应的提前的时刻发射上行信号; 接收所述终端发送的上行信号。
18、 一种基站, 其特征在于, 包括:
时间选择单元,用于根据基站侧接收上行信号的接收方式从多个时间提前 值中选择一个时间提前值;
指示单元,用于基于选择的时间提前值向终端发送用于确定时间提前值的 指示,所述指示用于指示所述终端在选择的时间提前值对应的提前的时刻发射 上行信号; 上行信号接收单元, 用于接收所述终端发送的上行信号。
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