WO2013155914A1 - Procédé et dispositif pour donner des informations de commande de puissance et commande de puissance - Google Patents

Procédé et dispositif pour donner des informations de commande de puissance et commande de puissance Download PDF

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Publication number
WO2013155914A1
WO2013155914A1 PCT/CN2013/072939 CN2013072939W WO2013155914A1 WO 2013155914 A1 WO2013155914 A1 WO 2013155914A1 CN 2013072939 W CN2013072939 W CN 2013072939W WO 2013155914 A1 WO2013155914 A1 WO 2013155914A1
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WIPO (PCT)
Prior art keywords
srs
power control
terminal
control process
transmission
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PCT/CN2013/072939
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English (en)
Chinese (zh)
Inventor
陈文洪
高秋彬
彭莹
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电信科学技术研究院
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Publication of WO2013155914A1 publication Critical patent/WO2013155914A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/06—TPC algorithms
    • H04W52/14—Separate analysis of uplink or downlink
    • H04W52/146—Uplink power control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/06—TPC algorithms
    • H04W52/14—Separate analysis of uplink or downlink
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/18—TPC being performed according to specific parameters
    • H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
    • H04W52/247—TPC 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 sent by another terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/30—TPC using constraints in the total amount of available transmission power
    • H04W52/32—TPC of broadcast or control channels
    • H04W52/325—Power control of control or pilot channels

Definitions

  • the present invention relates to the field of wireless communications, and in particular, to a power control information notification and power control method and device.
  • an SRS Sounding Reference Signal
  • the channel dissimilarity is used to acquire downlink channel information, thereby performing downlink scheduling and transmission.
  • CoMP Cooperative Multiple Point Transmission
  • the set of measured transmission points is also different.
  • the measurement points are relatively close transmission points, so the SRS transmission power does not need to be too high; if the measurement information is used for the selection of the downlink CoMP set, a larger range of transmission point measurement is required, and the required SRS is measured. The transmission power will also be higher.
  • RRH Remote Radio Head
  • RRU Remote Radio Unit
  • RRE Remote Radio Unit
  • distributed antenna etc.
  • BBU Base Band Unit
  • RRH and BBU are placed in different geographical locations.
  • the RRH includes a radio frequency circuit, an analog-to-digital (A/D) conversion module, a digital-to-analog (D/A) conversion module, and an optical transmission module.
  • the RRH is connected to the BBU through optical fibers.
  • a distributed RRH is a network form that utilizes RRH networking. The RRH is dispersed in a cell.
  • the terminal can provide high-constraint communication services. Since the data of all RRHs in a cell are processed centrally by the BBU, this brings about the possibility of efficient cooperation between RRHs. Therefore, distributed RRH becomes an important scene of CoMP research.
  • the deployment of distributed RRH can be divided into two types according to the presence or absence of macro stations: no macro station and macro station, uplink transmission and downlink transmission in the RRH deployment scenario with macro station as shown in Figure la (different cell ID) and Figure lb ( The same cell ID) is shown.
  • the scene of a macro station is generally based on the existing network to increase the RRH to meet the hotspot coverage of the local area.
  • RRHs with macro stations do not need to cover all locations, so their geographic location is generally random (related to the location of the hotspot).
  • the receiving end can simultaneously receive signals at multiple transmission points, and the detection performance is improved by the combination of the received signals.
  • the SRS can be used for the detection of the uplink channel, on the one hand according to the channel.
  • the strength determines the set of received transmission points, and on the other hand, performs scheduling according to the channel information, and determines the RI (Prior Indication, Identifier) I PQ (Principal Indicator Indicator) I CQI (Channel Quality Indicator) Measurement indicator).
  • the transmission power of the PUSCH Physical Uplink Shared Channel
  • the transmission power of the SRS only needs to satisfy the measurement of these points. For example, in Figure la and Figure lb, only the last two RRHs are needed for sounding.
  • the base station uses the measurement of the uplink SRS to obtain downlink channel information according to channel dissimilarity, and the channel information can be used for scheduling, determining the coordinated set, measurement set, transmission set, and frequency domain of the UE.
  • the resource and CQI can also be used for CoMP transmission operations such as CS (Check Sum), CB (Cell Broadcast), and JP (Joint Predistortion) at the base station.
  • CS Check Sum
  • CB Cell Broadcast
  • JP Job Predistortion
  • the coordinated set of UEs may cover a larger range and more transmission points. If SRS measurement is to be performed at these transmission points, SRS needs to be transmitted at a large transmission power. Launch to ensure the reliability of the measurement. For example, in Figure la, the macro station and all RRHs are in the cooperative set of UE1 and UE2, and SRS detection is performed.
  • the SRS sends the SRS periodically according to the configured information.
  • the latter is triggered by the PDCCH (Physical Downlink Control Channel).
  • the terminal sends the SRS only once.
  • the base station can trigger the aperiodic SRS by aperiodic SRS trigger signaling in DCI (Downlink Control Information) format (format) 0/1A/2B/2C/4.
  • DCI Downlink Control Information
  • Different acyclic SRSs triggered by different DCI formats can use different SRS parameter groups. These parameter groups are respectively configured by high-level signaling, and the parameter group includes parameters such as time-frequency resources and cyclic shifts used for transmitting the aperiodic SRS. .
  • the correspondence between DCI format and parameter group is as follows:
  • Table 1 The uplink transmit power of the SRS is obtained by the following SRS transmit power calculation formula:
  • 'MAX is the maximum transmit power of the UE' P SRS ⁇ .
  • FFSET,. 0) is an SRS transmission power adjustment value
  • the value range is determined by the high-level parameter Ks.
  • ⁇ is the downlink path loss estimate, measured by the UE, and its value is the CRS of the downlink base station (Cell-specific Reference signal, cell-specific pilot signal)
  • the ratio of the transmit power to the RSRP (Reference Signal Received Power) of the UE, /( ) is the closed-loop power control parameter, and the DCI (downlink Control Information) Information) format
  • the TPC (Transmit Power Control) command in 0/4/3/3A is obtained.
  • /( ) can be either an accumulated value or an absolute value.
  • the parameters used for closed-loop power control are mainly ⁇ ⁇ CHC and / ( ).
  • the former can perform quasi-static power control through high-level signaling, and the length is 4 bits, the range is [-7, 8], and the step size is ldB.
  • the ⁇ values obtained by the TPCs indicated in different DCI formats are different, as shown in Table 2 below:
  • the SRS-specific closed-loop power control parameter ra (/) is introduced.
  • the corresponding SRS-specific TPC command can be used.
  • the independent power adjustment is performed on the SRS, so as not to be affected by the PUSCH power control.
  • the SRS transmit power calculation formula should be changed to:
  • Another method that can be considered is to introduce a target power value of 0 SRS c (j) similar to Po-P ⁇ cH ⁇ " 7 ') for SRS , or to introduce SRS-specific similar to " e /"
  • the power control independent of the PUSCH is obtained.
  • the power control parameters dedicated to the SRS are exactly the same as the power control parameters corresponding to the PUSCH in the formula, but are configured by independent parameters.
  • the path loss offset parameter may be introduced to adjust the current downlink path loss measurement result, and the adjusted SRS transmission power calculation formula is changed to:
  • Embodiments of the present invention provide a power control information notification and power control method and device, which are used to solve how a terminal sends a message.
  • SRS can meet the needs of different measurement needs.
  • a method for notifying power control information comprising:
  • the base station determines an SRS power control process from the plurality of sounding reference signal SRS power control processes configured in advance for the terminal as the SRS power control process used by the terminal;
  • the base station notifies the SRS power control process used by the terminal through downlink signaling.
  • a power control method comprising:
  • the terminal acquires the SRS power control parameter corresponding to the SRS power control process, determines the uplink sending power of the SRS according to the SRS power control parameter, and performs SRS transmission according to the uplink sending power.
  • the base station comprising:
  • a determining unit configured to determine, according to a plurality of sounding reference signal SRS power control processes configured in advance for the terminal, an SRS power control process as an SRS power control process used by the terminal;
  • the notification unit is configured to notify the SRS power control process used by the terminal by using downlink signaling.
  • a terminal comprising:
  • a receiving unit configured to receive a notification of the used SRS power control process sent by the base station
  • a power control unit configured to acquire an SRS power control parameter corresponding to the SRS power control process, and determine an uplink transmit power of the SRS according to the SRS power control parameter;
  • a transmitting unit configured to perform SRS transmission according to the uplink sending power.
  • FIG. 1 is a schematic diagram of uplink transmission and downlink transmission in an RRH scenario in the prior art
  • Figure lb is a schematic diagram of uplink transmission and downlink transmission in another RRH scenario in the prior art
  • FIG. 2 is a schematic flowchart of a method according to an embodiment of the present invention.
  • FIG. 3 is a schematic flowchart of another method according to an embodiment of the present invention.
  • FIG. 4 is a schematic structural diagram of a device according to an embodiment of the present invention.
  • FIG. 5 is a schematic structural diagram of another device according to an embodiment of the present invention.
  • the embodiment of the present invention provides a power control information notification and a power control method.
  • the base station notifies the terminal of the SRS power control process, and the terminal
  • the uplink transmission power of the SRS is determined according to the SRS power control parameter corresponding to the SRS power control process, and the SRS transmission is performed according to the uplink transmission power.
  • a method for notifying power control information provided by a base station side includes the following steps:
  • Step 20 The base station determines, from the multiple SRS power control processes configured in advance for the terminal, an SRS power control process as the SRS power control process used by the terminal.
  • Step 21 The base station notifies the SRS power control process used by the terminal by using downlink signaling.
  • the base station may configure multiple SRS power control processes for the terminal by using the high layer signaling, and each SRS power control process configured corresponds to a set of SRS power control parameters.
  • the SRS power control parameter is the parameter used in the SRS transmit power calculation formula.
  • the SRS power control parameter includes at least one of the following parameters:
  • the configuration parameter of the reference signal used by the terminal for downlink path loss measurement may be an index corresponding to the reference signal (specific parameter information corresponding to each index is used by other
  • the high-level signaling indication may also be specific parameter information such as power, time-frequency resources, and the like of the reference signal;
  • the SRS power control parameter corresponding to at least one SRS power control process of the multiple SRS power control processes configured by the base station is the same as the corresponding parameter in the PUSCH power control, for example, the SRS function corresponding to the SRS power control process.
  • PUSCH power control parameters and control preclude the use of the same ⁇ PUSCH. (_/ ⁇ ), a c (j) . PL C and f c ⁇ i) ; and/or,
  • the at least one SRS power control parameter corresponding to at least one of the multiple SRS power control processes configured by the base station is different from the corresponding parameter in the PUSCH power control, including all different or partially different.
  • the base station may configure the priority of each SRS power control process in the multiple SRS power control processes to the terminal, or the base station and the terminal agree on the priority of each SRS power control process in the multiple SRS power control processes. .
  • the base station may configure the priority of each SRS power control process in the multiple SRS power control processes to the terminal, or configure the multiple SRS power control processes to the terminal after the terminal is configured with the multiple SRS power control processes. Configure the priority of each SRS power control process in multiple SRS power control processes.
  • the base station determines, according to a plurality of SRS power control processes configured in advance for the terminal, an SRS power control process as the SRS power control process used by the terminal, and the specific implementation is as follows:
  • the base station determines that the uplink channel information or the downlink channel information needs to be measured by using the SRS, and if the uplink channel information needs to be measured, determining the SRS power control process corresponding to the uplink transmission among the multiple SRS power control processes configured in advance for the terminal, The SRS power control process used by the terminal; if the downlink channel information needs to be measured, the SRS power control process corresponding to the downlink transmission in the plurality of SRS power control processes configured in advance for the terminal is determined, as the SRS used by the terminal. Power control process.
  • the base station determines an SRS power control process as the SRS power control process used by the terminal from the multiple SRS power control processes configured in advance for the terminal, and the specific implementation is as follows:
  • the SRS resource is used to determine an SRS power control process from a plurality of SRS power control processes configured in advance for the terminal, and the SRS power control process used by the terminal to use the SRS resource for SRS transmission; specifically, the base station may be configured for each
  • the SRS resources are respectively determined from the SRS power control processes configured in advance for the terminal, and the SRS power control process is used as the SRS power control process used by the terminal to perform the SRS transmission by using the SRS resource; or, the base station is a terminal in advance.
  • the SRS power control process is determined in the multiple SRS power control processes configured as the SRS power control process used by the terminal to perform SRS transmission using each SRS resource.
  • the base station notifies the SRS power control process used by the terminal by using downlink signaling
  • the specific implementation is as follows: The base station notifies the terminal to use the configured SRS resource by using the independent information bits in the DCI (Downlink Control Information) of the PDCCH (Physical Uplink Control CHannel).
  • DCI Downlink Control Information
  • PDCCH Physical Uplink Control CHannel
  • the base station determines an SRS power control process as the SRS power control process used by the terminal from multiple SRS power control processes configured in advance for the terminal, and the specific implementation is as follows: A plurality of SRS power control processes configured by the terminal determine an SRS power control process to be used as a SRS power control process used by the terminal for SRS transmission; correspondingly, in step 21, the base station notifies the terminal of the SRS by using downlink signaling
  • the power control process is implemented as follows: The base station notifies the terminal to use the SRS power control process when performing SRS transmission through high-level signaling or independent information bits in the DCI of the PDCCH. This embodiment is independent of determining that the SRS power control process is independent of SRS resources.
  • the SRS resources include, but are not limited to, a time-frequency resource of the SRS, a cyclic shift, and an SRS port.
  • SRS transmissions include periodic SRS transmissions and/or aperiodic SRS transmissions.
  • the aperiodic SRS transmission is the aperiodic SRS transmission triggered by the DCI or all aperiodic SRS. transmission.
  • the base station determines, according to a plurality of SRS power control processes configured in advance for the terminal, an SRS power control process as the SRS power control process used by the terminal, and the specific implementation is as follows:
  • the base station determines, according to the SRS parameter group corresponding to the DCI format that can trigger the aperiodic SRS transmission, the SRS function used by the SRS power control process as the terminal for the aperiodic SRS transmission from the multiple SRS power control processes configured in advance for the terminal. Specifically, the base station may determine, according to each SRS parameter group corresponding to the DCI format that can trigger the aperiodic SRS transmission, one SRS power control process from the multiple SRS power control processes configured in advance for the terminal as the terminal.
  • the SRS power control process used in the periodic SRS transmission; or, the base station determines one SRS function from multiple SRS power control processes configured for the terminal in advance for all SRS parameter groups corresponding to the DCI format capable of triggering the aperiodic SRS transmission.
  • the SRS power control process used by the control process as a terminal for aperiodic SRS transmission.
  • the base station notifies the SRS power control process used by the terminal by using downlink signaling, and the specific implementation is as follows:
  • the base station notifies the SRS power control process used by the terminal to perform the aperiodic SRS transmission associated with the SRS parameter group through the high layer signaling.
  • the aperiodic SRS transmission is an aperiodic SRS transmission or all aperiodic SRS transmission triggered by a DCI format corresponding to the SRS parameter group.
  • the SRS parameter group includes parameters such as time-frequency resources and cyclic shifts used for transmitting the non-periodic SRS.
  • the base station determines from multiple SRS power control processes configured in advance for the terminal.
  • the base station determines, by using a plurality of SRS power control processes configured in advance for the terminal, an SRS power control process as the SRS power control process used by the terminal for aperiodic SRS transmission;
  • the base station notifies the SRS power control process used by the terminal by using downlink signaling, and the specific implementation is as follows:
  • the base station notifies the SRS power control process used by the terminal to perform the aperiodic SRS transmission by using the trigger bit of the aperiodic SRS in the DCI of the PDCCH, where the indication information of the SRS power control process and the trigger information of the aperiodic SRS are jointly encoded. .
  • the aperiodic SRS transmission is an aperiodic SRS transmission triggered by the DCI or all aperiodic SRS transmissions.
  • the power control method provided by the terminal side of the present invention includes the following steps: Step 30: The terminal receives a notification of the used SRS power control process sent by the base station;
  • Step 31 The terminal acquires the SRS power control parameter corresponding to the SRS power control process, determines the uplink sending power of the SRS according to the SRS power control parameter, and performs SRS transmission according to the uplink sending power.
  • the terminal receives the notification of the used SRS power control process sent by the base station, the terminal receives multiple SRS power control processes configured by the base station through the high layer signaling, and each SRS power control process configured corresponds to a set of SRS functions. Control parameters.
  • the SRS power control parameter includes at least one of the following parameters:
  • the path loss compensation factor oc c ( ) used for PUSCH power control or the path loss compensation factor of the SRS is asRS 'person j ⁇ ; path loss offset parameter
  • the configuration parameter of the reference signal used by the terminal for downlink path loss measurement may be an index corresponding to the reference signal (specific parameter information corresponding to each index is used by other
  • the high-level signaling indication may also be specific parameter information such as power, time-frequency resources, and the like of the reference signal;
  • the SRS power control parameter corresponding to at least one SRS power control process of the multiple SRS power control processes configured by the base station is the same as the corresponding parameter in the PUSCH power control; and/or,
  • the at least one SRS power control parameter corresponding to at least one of the multiple SRS power control processes configured by the base station is different from the corresponding parameter in the PUSCH power control.
  • step 30 the terminal receives the notification of the used SRS power control process sent by the base station, and the specific implementation is as follows: The terminal receives the notification of the SRS power control process used by the base station by using the high-level signaling or the independent information bits in the DCI of the PDCCH, and the transmitted terminal uses the configured SRS resource to perform SRS transmission.
  • the terminal performs SRS transmission according to the uplink transmission power, and the specific implementation is as follows: The terminal performs periodic SRS transmission and/or aperiodic SRS transmission on the SRS resource.
  • step 30 the terminal receives the notification of the used SRS power control process sent by the base station, and the specific implementation is as follows: The terminal receives the independent information bit sent by the base station through the high layer signaling or the PDCCH, and sends the information. The notification of the SRS power control process used by the terminal for SRS transmission. Correspondingly, in step 31, the terminal performs periodic SRS transmission and/or aperiodic SRS transmission according to the uplink transmission power.
  • the SRS resources include, but are not limited to, a time-frequency resource of the SRS, a cyclic shift, and an SRS port.
  • the terminal receives the independent information bits in the DCI of the PDCCH through the PDCCH, and the transmitting terminal performs the
  • the aperiodic SRS transmission is an aperiodic SRS transmission triggered by the DCI or all aperiodic SRS transmissions.
  • step 30 the terminal receives the notification of the used SRS power control process sent by the base station, and the specific implementation is as follows:
  • the terminal receives the SRS power control process used by the base station to perform the aperiodic SRS transmission associated with the SRS parameter group corresponding to the DCI format capable of triggering the aperiodic SRS.
  • step 31 the specific implementation of the SRS power control parameter corresponding to the SRS power control process is as follows: After receiving the DCI triggered by the base station and triggering the aperiodic SRS transmission, the terminal responds according to the DCI format of the received DCI.
  • the SRS parameter group obtains the SRS power control process associated with the SRS parameter group corresponding to the DCI format; and obtains the SRS power control parameter corresponding to the SRS power control process;
  • the terminal performs SRS transmission according to the uplink transmission power, and the specific implementation is as follows:
  • the terminal performs the aperiodic SRS transmission triggered by the DCI format corresponding to the SRS parameter group according to the uplink transmission power, or performs all aperiodic SRS transmission according to the uplink transmission power.
  • step 30 the terminal receives the notification of the used SRS power control process sent by the base station, and the specific implementation is as follows:
  • the terminal receives the trigger bit of the aperiodic SRS in the DCI of the PDCCH by the base station, and the notification of the SRS power control process used by the transmitting terminal to perform the aperiodic SRS transmission, where the indication information of the SRS power control process and the aperiodic SRS are The trigger information is jointly encoded.
  • step 31 the terminal performs SRS transmission according to the uplink transmission power
  • the implementation is as follows: The terminal performs the aperiodic SRS transmission triggered by the DCI according to the uplink transmission power, or performs all aperiodic according to the uplink transmission power. SRS transmission.
  • step 31 when determining the uplink transmit power of the SRS according to the SRS power control parameter, the terminal specifically introduces the SRS power control parameter into the SRS transmit power calculation formula, and calculates the SRS according to the SRS transmit power calculation formula. Line transmit power.
  • the terminal determines the uplink transmit power of the SRS according to the SRS power control parameter
  • the SRS power control parameter includes the configuration parameter of the reference signal used by the UE for the downlink path loss measurement
  • the configuration parameter is required to be based on the reference signal.
  • the downlink path loss value PL is measured, and the uplink transmission power of the SRS is determined according to the measured downlink path loss value PL.
  • the terminal and the base station need to predetermine a method for determining the used SRS power control process, and the method includes:
  • the SRS power control process with a higher uplink transmit power of the corresponding SRS or
  • the base station and the UE agree on the priority of the multiple SRS power control processes, and use the higher priority SRS power control process, that is, the terminal selects the higher priority according to the priority of multiple SRS power control processes pre-agreed with the base station.
  • the SRS power control process is used as the current SRS power control process; or
  • the terminal selects a higher priority SRS power control process as the current SRS power control process according to the priority of the multiple SRS power control processes that are configured in advance by the base station; or
  • the terminal does not perform SRS transmission on the corresponding SRS resource.
  • Embodiment 1 is a diagrammatic representation of Embodiment 1:
  • Step 1 The base station configures multiple SRS power control processes for the UE, and each SRS power control process is configured to correspond to a set of SRS power control parameters.
  • the UE receives multiple SRS power control processes configured by the base station and SRS corresponding to each SRS power control process.
  • the base station configures two SRS power control processes for the UE, and the SRS power control parameter corresponding to one SRS power control process (process 1) is the SRS power control parameter in the current protocol, and uses the current protocol.
  • the SRS transmission power calculation formula, the SRS power control parameter corresponding to another SRS power control process includes the following parameters different from the process 1:
  • the closed loop power control parameter (i) dedicated to SRS replaces f c (i);
  • SRS power control parameters are the same as process 1. These SRS power control parameters are configured through high layer signaling. The base station and the terminal agree that if the same SRS resource corresponds to two different SRS power control processes, the SRS power control process with the higher uplink transmit power of the corresponding SRS is used.
  • Step 2 The base station is configured as an SRS resource, and an SRS power control process is determined from a plurality of SRS power control processes configured in advance for the terminal, and the SRS power control process used by the terminal to use the SRS resource for SRS transmission;
  • the high-level signaling notifies the SRS power control process used by the terminal to perform the SRS transmission by using the configured SRS resource.
  • the base station notifies the UE to use the configured one-cycle SRS resource by using the high-layer signaling (including the SRS period and the subframe offset configuration).
  • the SRS power control process used for periodic SRS transmission is SRS power control process 1
  • the SRS power control process used for the periodic SRS transmission is the SRS power control process 2;
  • Step 3 The UE receives a notification of the SRS power control process used by the UE to perform SRS transmission by using the configured SRS resource by using the uplink signaling.
  • Step 4 The UE obtains the SRS power control parameter corresponding to the notified SRS power control process, determines the uplink sending power of the SRS according to the SRS power control parameter, and performs SRS transmission according to the uplink sending power.
  • the UE uses the corresponding SRS power control process to perform SRS power control on different SRS resources and subframe offset configuration corresponding SRS resources. Specifically, for the SRS resource corresponding to the SRS period and the subframe offset configuration, the UE determines the SRS power control process corresponding to the SRS resource, and the SRS power control parameter corresponding to the SRS power control process is substituted into the SRS transmission power calculation formula. The uplink transmit power of the SRS, thereby performing periodic SRS transmission on the SRS resource.
  • the coincident SRS resources will correspond to the two SRS power control processes at the same time.
  • the SRS transmission with the corresponding uplink transmission power should be used for SRS transmission on the coincident SRS resources. Control process.
  • Embodiment 2 is a diagrammatic representation of Embodiment 1:
  • Step 1 The base station configures multiple SRS power control processes for the UE, and each SRS power control process is configured to correspond to a set of SRS power control parameters.
  • the UE receives multiple SRS power control processes configured by the base station and SRS corresponding to each SRS power control process.
  • the base station configures two SRS power control processes for the UE, and the SRS power control parameter corresponding to one SRS power control process (process 1) is the SRS power control parameter in the current protocol, and uses the current protocol.
  • the SRS transmission power calculation formula, the SRS power control parameter corresponding to another SRS power control process includes the following parameters different from the process 1:
  • the closed loop power control parameter (i) dedicated to SRS replaces f c (i);
  • the index of the reference signal used by the UE for downlink path loss measurement (the specific parameter information corresponding to the index is configured by other high layer signaling);
  • SRS power control parameters are the same as process 1. These SRS power control parameters are configured through high layer signaling. The base station and the terminal agree that if the same SRS resource corresponds to two different SRS power control processes, the SRS power control process with the higher uplink transmit power of the corresponding SRS is used.
  • Step 2 The base station is configured as an SRS resource, and an SRS power control process is determined from a plurality of SRS power control processes configured in advance for the terminal, and the SRS power control process used by the terminal to use the SRS resource for SRS transmission; An independent information bit in the DCI of the PDCCH, and notifying the SRS power control process used by the UE to perform SRS transmission using the configured SRS resource;
  • the independent information bits in the DCI are 1 information bit, and the SRS power control process can be used for all non- Periodic SRS transmission (until there is a next indication to change this configuration).
  • Step 3 The UE receives the notification that the base station uses the independent information bits in the DCI, and the sent UE uses the configured SRS resource to perform the SRS transmission process.
  • Step 4 The UE obtains the SRS power control parameter corresponding to the notified SRS power control process, determines the uplink sending power of the SRS according to the SRS power control parameter, and performs SRS transmission according to the uplink sending power.
  • the notified SRS power control process is process 1
  • the corresponding SRS power control mechanism and parameters are the same as the SRS power control mechanism and parameters in the current protocol; if process 2 is used, the pre-configured UE is used to perform the next
  • the reference signal used for the path loss measurement obtains the downlink path loss value, and then the SRS transmission power adjustment value P SRS 0FFSET c (m) and (i) corresponding to the process 2 and the obtained path loss value are substituted into the SRS transmission power.
  • the calculation formula obtains the uplink transmission power of the SRS, and performs aperiodic SRS transmission on the corresponding SRS resource.
  • the SRS power control process is used. Perform the power control of the SRS. If the power control process used by the aperiodic SRS is different according to the indication of the base station, when the aperiodic SRS transmission is performed on the corresponding SRS resource, the SRS power control process with the corresponding higher uplink transmit power should be used for power. control.
  • Embodiment 3 is a diagrammatic representation of Embodiment 3
  • Step 1 The base station configures multiple SRS power control processes for the UE, and each SRS power control process is configured to correspond to a set of SRS power control parameters.
  • the UE receives multiple SRS power control processes configured by the base station and SRS corresponding to each SRS power control process.
  • the base station configures two SRS power control processes for the UE, and the SRS power control parameter corresponding to one SRS power control process (process 1) is the SRS power control parameter in the current protocol, and uses the current protocol.
  • the SRS transmission power calculation formula, the SRS power control parameters corresponding to other SRS power control processes include the following parameters different from the process 1: SRS transmission power adjustment value P SRS OFFSET.c m ) '
  • the closed loop power control parameter (i) dedicated to SRS replaces f c (i);
  • SRS power control parameters are the same as process 1. These SRS power control parameters are configured through high layer signaling.
  • the base station also agrees with the UE on the priority of each SRS power control process. For example, the priority of process 2 is higher than that of process 1.
  • Step 2 The base station uses an SRS parameter group corresponding to the DCI format capable of triggering the aperiodic SRS transmission, and determines an SRS power control process from the plurality of SRS power control processes configured in advance for the terminal to perform the aperiodic SRS transmission.
  • the SRS power control process is used to notify the UE of the SRS power control process used for the aperiodic SRS transmission for the SRS parameter group through the high layer signaling; the UE receives the notification.
  • the base station determines an SRS power control process for each SRS parameter group corresponding to the DCI format that triggers the aperiodic SRS transmission, and determines the SRS power control process corresponding to the SRS parameter group by using 1-bit high-layer signaling. 1 or process 2) Notify the UE.
  • Step 3 The base station triggers the UE to perform aperiodic SRS transmission by using DCI of the PDCCH.
  • Step 4 After receiving the DCI of the base station that triggers the aperiodic SRS transmission, the UE determines the SRS parameter group corresponding to the DCI format of the DCI, and then determines the SRS power control process corresponding to the SRS parameter group according to the notification received in step 2. Obtaining an SRS power control parameter corresponding to the SRS power control process, determining an uplink transmit power of the SRS according to the SRS power control parameter, and performing SRS transmission according to the uplink transmit power.
  • the SRS power control parameter corresponding to the SRS power control process is substituted into the SRS transmission power calculation formula, and the uplink transmission power of the SRS is obtained, and the aperiodic SRS transmission triggered by the DCI is performed according to the uplink transmission power.
  • the SRS power control process is used to perform the SRS. Power control. If the SRS power control process used by these aperiodic SRS transmissions is different according to the base station indication, when the aperiodic SRS transmission is performed on the corresponding SRS resource, the SRS power control process with higher priority should be used for power control. . For example, if both process 1 and process 2 are triggered in the same subframe and the same SRS resource is used, the SRS power control parameter corresponding to process 2 should be used for SRS power control.
  • Embodiment 4 is a diagrammatic representation of Embodiment 4:
  • Step 1 The base station configures multiple SRS power control processes for the UE, and each SRS power control process is configured to correspond to a set of SRS power control parameters.
  • the UE receives multiple SRS power control processes configured by the base station and SRS corresponding to each SRS power control process.
  • the power control parameters Specifically, the base station configures three SRS power control processes for the UE, and the SRS power control parameter corresponding to one power control SRS process (process 1) is the SRS power control parameter in the current protocol, and uses the current protocol.
  • the SRS transmission power calculation formula, the SRS power control parameters corresponding to other processes include the following parameters different from the process 1: SRS transmission power adjustment value P SRS OFFSET, c ⁇ m ) ',
  • the closed loop power control parameter (i) dedicated to SRS replaces f c (i);
  • SRS power control parameters are the same as process 1. These SRS power control parameters are configured through high layer signaling.
  • the base station also agrees with the UE that if the same SRS resource corresponds to two different SRS power control processes, the SRS power control process with the higher uplink transmit power of the corresponding SRS is used.
  • Step 2 The base station determines, according to a plurality of SRS power control processes configured in advance for the terminal, an SRS power control process as an SRS power control process used by the terminal for aperiodic SRS transmission; and passes the aperiodic in the DCI of the PDCCH.
  • the triggering bit of the SRS notifies the UE of the SRS power control process used for the aperiodic SRS transmission, where the indication information of the SRS power control process is jointly encoded with the trigger information of the aperiodic SRS.
  • the base station jointly encodes the aperiodic trigger information and the indication information of the SRS power control process, and triggers the UE to perform the aperiodic SRS transmission by using the 2-bit acyclic SRS trigger bit in the DCI, and indicates the used
  • the indication contents of the 2-bit trigger bits are as follows: Indication field indication content
  • Step 3 The UE receives the notification of the SRS power control process used by the UE to perform the aperiodic SRS transmission through the trigger bit of the aperiodic SRS in the DCI, according to the SRS power control process included in the trigger bit.
  • the instructions are known to the SRS power control process used.
  • the UE obtains the SRS power control parameter corresponding to the SRS power control process, determines the uplink sending power of the SRS according to the SRS power control parameter, and performs the aperiodic SRS transmission according to the uplink sending power.
  • the SRS power control parameter corresponding to the SRS power control process is substituted into the SRS transmission power calculation formula, and the uplink transmission power of the SRS is obtained, and the aperiodic SRS transmission triggered by the DCI is performed according to the uplink transmission power.
  • the non-synchronous SRS resources are different on the corresponding SRS resources.
  • the SRS power control process with the corresponding SRS uplink transmission power is used for power control. For example, if both process 1 and process 3 are triggered in the same subframe and the same SRS resource is used, if the uplink transmission power of the SRS obtained according to the SRS power control parameter corresponding to process 3 is large, the process should be used. 3 corresponding SRS power control parameters for SRS power control.
  • an embodiment of the present invention provides a base station, where the base station includes:
  • a determining unit 40 configured to determine, according to a plurality of sounding reference signal SRS power control processes configured in advance for the terminal, an SRS power control process as an SRS power control process used by the terminal;
  • the notification unit 41 is configured to notify the SRS power control process used by the terminal by using downlink signaling.
  • the base station further includes:
  • the first configuration unit 42 is configured to configure multiple SRSs for the terminal by using high layer signaling before determining that one SRS power control process is used as the SRS power control process used by the terminal from the multiple SRS power control processes configured in advance for the terminal.
  • the power control process, each SRS power control process configured corresponds to a set of SRS power control parameters.
  • the SRS power control parameter includes at least one of the following parameters:
  • the SRS power control parameter corresponding to at least one SRS power control process of the multiple SRS power control processes configured by the base station is the same as the corresponding parameter in the PUSCH power control;
  • the at least one SRS power control parameter corresponding to at least one of the multiple SRS power control processes configured by the base station is different from the corresponding parameter in the PUSCH power control.
  • the base station further includes:
  • the second configuration unit 43 is configured to configure, to the terminal, a priority of each SRS power control process in the multiple SRS power control processes, or the base station and the terminal appoint a priority of each SRS power control process in the multiple SRS power control processes level.
  • the determining unit 40 is configured to:
  • an SRS power control process is determined from a plurality of SRS power control processes configured in advance for the terminal, and the SRS power control process used by the terminal to use the SRS resource for SRS transmission;
  • the notification unit 41 is configured to:
  • the downlink information of the PDCCH, the independent information bits in the DCI informs the terminal of the SRS power control process used when the SRS resource is used for the SRS transmission.
  • the determining unit 40 is configured to:
  • the notifying unit 41 is configured to: notify the terminal to use the SRS power control process when performing SRS transmission by using the high-level signaling or the independent information bits in the DCI of the PDCCH.
  • the SRS resource includes: a time-frequency resource of the SRS, a cyclic shift, and an SRS port.
  • the SRS transmission includes periodic SRS transmission and/or aperiodic SRS transmission.
  • the notification unit 41 notifies the SRS power control process by the independent information bits in the DCI of the PDCCH, and the SRS transmission includes the aperiodic SRS transmission
  • the aperiodic SRS transmission is the aperiodic SRS triggered by the DCI. Transmission or all aperiodic SRS transmissions.
  • the determining unit 40 is configured to:
  • the notification unit 41 is configured to:
  • the SRS power control process used by the terminal to perform the aperiodic SRS transmission associated with the SRS parameter group is notified by the high layer signaling. Further, the aperiodic SRS transmission is an aperiodic SRS transmission triggered by a DCI format corresponding to the SRS parameter group or all aperiodic SRS transmissions.
  • the determining unit 40 is configured to:
  • the notification unit 41 is configured to:
  • the triggering bit of the aperiodic SRS in the DCI of the PDCCH is used to notify the terminal of the SRS power control process used for the aperiodic SRS transmission, where the indication information of the SRS power control process is jointly encoded with the trigger information of the aperiodic SRS.
  • aperiodic SRS transmission is an aperiodic SRS transmission triggered by the DCI or all aperiodic SRS transmissions.
  • an embodiment of the present invention provides a terminal, where the terminal includes:
  • the receiving unit 50 is configured to receive, by the base station, a notification of the used SRS power control process
  • the power control unit 51 is configured to obtain an SRS power control parameter corresponding to the SRS power control process, and determine an uplink transmit power of the SRS according to the SRS power control parameter;
  • the transmitting unit 52 is configured to perform SRS transmission according to the uplink sending power.
  • the receiving unit 50 is further configured to:
  • each SRS power control process configured corresponds to a set of SRS power control parameters.
  • the SRS power control parameter includes at least one of the following parameters:
  • the base station is configured by at least one of the multiple SRS power control processes configured by the terminal, corresponding to the SRS power control process.
  • SRS power control parameters which are the same as corresponding parameters in PUSCH power control; and / or,
  • the at least one SRS power control parameter corresponding to at least one of the multiple SRS power control processes configured by the base station is different from the corresponding parameter in the PUSCH power control.
  • the power control unit 51 is configured to:
  • the SRS power control parameter includes a configuration parameter of a reference signal used by the terminal for downlink path loss measurement
  • the root According to the configuration parameter of the reference signal used for downlink path loss measurement, the downlink loss value is measured based on the reference signal, and the uplink transmission power of the SRS is determined according to the measured downlink path loss value.
  • the receiving unit 50 is configured to:
  • the transmission unit 52 is used to:
  • Periodic SRS transmission and/or aperiodic SRS transmission are performed on the SRS resource.
  • the receiving unit 50 is configured to:
  • the transmitting unit 52 is configured to: the terminal perform periodic SRS transmission and/or aperiodic SRS transmission according to the uplink transmission power.
  • the SRS resource includes: a time-frequency resource of the SRS, a cyclic shift, and an SRS port.
  • the transmitting terminal when the receiving unit 50 receives the notification that the base station uses the independent information bits in the DCI of the PDCCH, the transmitting terminal performs the SRS transmission process, and the SRS transmission includes the aperiodic SRS transmission.
  • the aperiodic SRS transmission is an aperiodic SRS transmission or all aperiodic SRS transmission triggered by the DCI.
  • the receiving unit 50 is configured to:
  • the power control unit 51 is configured to: receive, by the base station, a DCI that triggers aperiodic SRS transmission, and obtain an SRS power control process associated with the SRS parameter group according to the SRS parameter group corresponding to the DCI format of the DCI; And obtaining the SRS power control parameter corresponding to the SRS power control process;
  • the transmission unit 52 is used to:
  • the receiving unit 50 is configured to:
  • the transmission unit 52 is used to:
  • the power control unit 51 is further configured to:
  • the priority of the multiple SRS power control processes pre-configured by the base station is selected, and the SRS power control process with higher priority is selected as the current SRS power control process. Process; or,
  • SRS transmission is not performed on the SRS resource.
  • the beneficial effects of the present invention include:
  • the base station after determining the SRS power control process used by the terminal, notifies the terminal of the SRS power control process used by the terminal, and the terminal only participates in the SRS power control corresponding to the SRS power control process.
  • the parameter determines the uplink transmit power of the SRS, and performs SRS transmission according to the uplink transmit power. It can be seen that, by using the solution, the base station can determine that the terminal uses different SRS power control processes according to different measurement requirements, and notifies the terminal of the determined SRS power control process, so that the terminal can respond to the SRS according to the notified SRS power control process.
  • the power control parameters perform power control of the SRS, so that the SRS sent by the terminal can meet different measurement requirements.
  • embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the present invention can be embodied in the form of a computer program product embodied on one or more computer-usable storage interfaces (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer usable program code.
  • computer-usable storage interfaces including but not limited to disk storage, CD-ROM, optical storage, etc.
  • the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
  • the apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.
  • These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
  • the instructions are provided for implementing one or more processes and/or block diagrams in the flowchart The steps of the function specified in the box or in multiple boxes.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

La présente invention concerne un procédé et un dispositif pour donner des informations de commande de puissance, ainsi qu'une commande de puissance qui se rapportent au domaine technique des communications sans fil et sont utilisés pour résoudre le problème sur la manière de réaliser un signal SRS (signal de référence de sondage) qui est envoyé par un terminal et qui satisfait différentes exigences de mesure. Dans cette invention, après la détermination d'un processus de commande de puissance d'un signal SRS utilisé par un terminal, la station de base informe le terminal sur le processus de commande de puissance du signal SRS utilisé par le terminal et le terminal détermine la puissance d'émission en liaison montante du signal SRS sur la base d'un paramètre de commande de puissance du signal SRS correspondant au processus de commande de puissance du signal SRS, et transmet le signal SRS selon la puissance d'émission en liaison montante. Avec ce système, le signal SRS envoyé par le terminal peut satisfaire différentes exigences de mesure.
PCT/CN2013/072939 2012-04-17 2013-03-20 Procédé et dispositif pour donner des informations de commande de puissance et commande de puissance WO2013155914A1 (fr)

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WO2019169590A1 (fr) * 2018-03-07 2019-09-12 Oppo广东移动通信有限公司 Procédé de signalement de marge de puissance de srs, dispositif terminal et support de stockage informatique
CN110476461A (zh) * 2018-01-19 2019-11-19 Oppo广东移动通信有限公司 功率控制的方法、终端设备和网络设备
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CN113891443A (zh) * 2018-02-28 2022-01-04 上海朗帛通信技术有限公司 一种被用于无线通信的用户设备、基站中的方法和装置
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