WO2016015204A1 - 功率控制方法和装置、参数传输方法和装置、基站和终端 - Google Patents

功率控制方法和装置、参数传输方法和装置、基站和终端 Download PDF

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Publication number
WO2016015204A1
WO2016015204A1 PCT/CN2014/083152 CN2014083152W WO2016015204A1 WO 2016015204 A1 WO2016015204 A1 WO 2016015204A1 CN 2014083152 W CN2014083152 W CN 2014083152W WO 2016015204 A1 WO2016015204 A1 WO 2016015204A1
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WO
WIPO (PCT)
Prior art keywords
terminal
power control
base station
control parameter
parameter
Prior art date
Application number
PCT/CN2014/083152
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English (en)
French (fr)
Inventor
曹一卿
Original Assignee
宇龙计算机通信科技(深圳)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.)
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Publication date
Application filed by 宇龙计算机通信科技(深圳)有限公司 filed Critical 宇龙计算机通信科技(深圳)有限公司
Priority to PCT/CN2014/083152 priority Critical patent/WO2016015204A1/zh
Priority to CN201480080786.0A priority patent/CN106664663B/zh
Priority to EP14899054.2A priority patent/EP3163951B1/en
Publication of WO2016015204A1 publication Critical patent/WO2016015204A1/zh
Priority to US15/414,096 priority patent/US10091741B2/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
    • H04W52/18TPC 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
    • H04W52/24TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
    • H04W52/243TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters taking into account interferences
    • 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
    • H04W52/383TPC being performed in particular situations power control in peer-to-peer links
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/20Control channels or signalling for resource management
    • H04W72/23Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal

Definitions

  • the present invention relates to the field of terminal technologies, and in particular, to a power control method, a parameter transmission method, a power control device, a parameter transmission device, a base station, and a terminal.
  • Background technique
  • D2D Device to Device refers to the terminal not communicating over the network and communicating directly. Since base station forwarding is not required, a large amount of resources of the mobile network can be saved, and the network capacity can be further improved.
  • D2D peer-to-peer communication is similar to traditional cellular communication. Broadcast communication consists of one transmitting node and several receiving nodes. There may be multiple forwardings in the middle. Because there are many receiving nodes and the (sending node) channels are independent of each other, In order to guarantee the coverage of the broadcast, the maximum power transmission is usually used.
  • Mode 1 The communication transmission resource of the D2D UE is directly scheduled by the network (base station).
  • Mode 2 The D2D UE autonomously selects a communication transmission resource in a preset resource pool.
  • the base station In order to reduce the impact on the LTE (Long Term Evolution) network and ensure the reliability of transmission, the base station usually allocates resources directly (mode 1) or specifies the resource pool (mode 2), and is terminated by the terminal. Among them, resources are selected for communication.
  • Mode 2 communication is usually used because there is no base station.
  • the LTE signal Since the D2D signal and the LTE signal are transmitted on adjacent resource blocks in the same frequency band, and the D2D signal power is much higher than the power-controlled LTE signal, the LTE signal is generated. Large interference. To this end, a technical solution has been introduced to control the power of the D2D signal and reduce the large interference of the transmission power of the D2D signal to the LTE signal.
  • the main focus is on the use of mode 1 to obtain resource allocation, and the base station configures power control parameters P0 and alpha for the UE.
  • the power control method of the traditional LTE is used.
  • the base station performs power control, which can well solve the problem that the UE in the coverage 1 interferes with the LTE signal in the coverage.
  • this method does not solve the problem of interference of UEs outside the coverage to LTE.
  • the large dotted line is the D2D communication area, which is larger than the coverage of the solid line base station.
  • UE1, UE2, and UE3 are D2D communication terminals, where UE2 and UE3 are outside the coverage. If the transmission signals of UE2 and UE3 do not use power control (full power transmission), the base station BS4 may interfere with the reception of the UL signal of UE4. Therefore, UE2 and UE3 also need to transmit power through power control modulation to reduce the impact on LTE UEs.
  • the power control objective of UE2 and UE3 is to transmit signals with as much power as possible without disturbing the BS receiving LTE UE signals to obtain far-reaching coverage. However, since UE2 and UE3 are not under network coverage, the appropriate power control parameters P0 and alpha cannot be configured by the base station, and therefore, accurate control of UE2 and UE3 cannot be performed.
  • the present invention is based on the above problems, and proposes a new technical solution, which can perform power control on a UE that has interference to a base station outside the coverage of the base station, so as to reduce interference with signals received by the base station.
  • an aspect of the present invention provides a power control method for terminal direct communication, including: determining at least one terminal that has interference to the base station outside a coverage of the base station; and the base station acquiring the at least one The measurement signal sent by each terminal in a terminal reaches the signal strength information of the base station, and the corresponding power control parameter is configured for each terminal according to the signal strength information; the base station corresponding to each terminal And transmitting, to the synchronization source terminal, the synchronization source terminal in the coverage of the base station corresponding to each terminal The terminal sends the power control parameter to the corresponding terminal, so that each terminal uses the corresponding power control parameter for power control.
  • parameter information of each terminal to the base station such as the distance from each terminal to the base station, power consumption, etc.
  • the parameter information is configured to configure a suitable power control parameter for the terminal that interferes with the base station outside the coverage of the base station, so that the terminal controls the power of the transmitted signal according to the power control parameter, so that the sending distance of the sent signal of the terminal is as far as possible.
  • the transmitted signal passes through the base station, it does not interfere with the received signal of the base station.
  • the base station cannot directly transmit the power control parameter to the target terminal, and the power control parameter needs to be first transmitted to the synchronization source terminal of the target terminal, and then the synchronization source terminal
  • the power control parameter is transmitted to the corresponding target terminal, where the synchronization source terminal is a terminal within the coverage of the base station, and the terminal can perform D2D communication with the terminal that has interference to the base station outside the coverage of the base station.
  • the power control parameters include, but are not limited to, power limits and adjustment parameters.
  • the power control parameter corresponding to each terminal of the at least one terminal is the same as or different from the power control parameter of the other terminal, and the measurement signal includes a pilot signal, a reference symbol, and/or Other signals known to transmit power.
  • the base station may configure the same or different power control parameters for each terminal.
  • the control signaling overhead may be reduced, and at the same time, the base station may also The signal strength information of each terminal's transmitted measurement signal arriving at the base station configures accurate power control parameters for each terminal, thereby achieving precise control of the transmission power of each terminal.
  • the measurement signals include, but are not limited to, pilot signals, reference symbols, and/or other signals of known transmit power.
  • the base station directly sends the same power control parameter to the synchronization corresponding to each terminal. And a source terminal, where the synchronization source terminal sends the same power control parameter to the corresponding terminal.
  • the base station when the power control parameters of each terminal are the same as the power control parameters of other terminals, the base station only needs to send the power control parameters to the synchronization source terminal of each terminal.
  • the base station when the power control parameter corresponding to each terminal is different from the power parameters of other terminals, the base station sends the terminal identification information of each terminal and the corresponding power control parameter to And the synchronization source terminal corresponding to each terminal, so that the synchronization source terminal sends the power control parameter according to the terminal identification information and the corresponding power control parameter.
  • the base station needs to send the power control parameter together with the terminal identification information of each terminal to the synchronization source terminal of each terminal. So that the synchronization source terminal clarifies the target terminal of the power control parameter.
  • the base station configures corresponding power control parameters for each terminal by using RRC (Radio Resource Control) signaling, and each terminal is configured by using a physical downlink control channel.
  • Corresponding power control parameters are sent to the synchronization source terminal corresponding to each terminal.
  • Another aspect of the present invention provides a parameter transmission method, for a terminal, including: when receiving a power control parameter sent by a base station, sending the power control parameter to a coverage outside a coverage of the base station by The terminal provides other terminals of the synchronization signal for the other terminals to perform power control using the power control parameters.
  • the terminal can control the power of the transmission signal according to the power control parameter, so that the transmission distance of the transmission signal of the terminal is exhausted. It may be far away, and at the same time, when the transmitted signal passes through the base station, it will not interfere with the received signal of the base station.
  • the method further includes: the terminal placing the power control parameter on the physical terminal directly connected to the shared channel PD2DSCH, or placing it in scheduling signaling, or placing the transmission data in the transmission data to be sent to the other terminal.
  • the power control parameters may be transmitted in various manners, including but not limited to the above manners.
  • the power control parameter is directly sent to each of the other terminals. terminal.
  • the identifier of the corresponding terminal is not received, it indicates that each terminal in the other terminal corresponds to the same power control parameter, and therefore, the terminal directly sends the power control parameter. To each terminal in other terminals.
  • the terminal identification information corresponding to each power control parameter is received, according to the power control parameter corresponding to each The terminal identification information sends the each power control parameter to a corresponding one of the other terminals.
  • each corresponding power control parameter needs to be sent to a corresponding target according to the identification information of each terminal.
  • the terminal to avoid sending erroneous power control parameters to the target terminal.
  • a further aspect of the present invention provides a power control apparatus for terminal direct communication, comprising: a determining unit, determining at least one terminal that interferes with the base station outside a coverage of the base station; and a parameter configuration unit, acquiring the The measurement signal sent by each terminal in the at least one terminal reaches the signal strength information of the base station, and the corresponding power control parameter is configured for each terminal according to the signal strength information; the sending unit, corresponding to each terminal The power control parameter is sent to the synchronization source terminal corresponding to each base station in the coverage of the base station, to send the power control parameter to the corresponding terminal by the synchronization source terminal, for each of the The terminal uses the corresponding power control parameters for power control.
  • a terminal that interferes with the base station outside the coverage of the base station is configured with appropriate power control parameters, so that the terminal controls the power of the transmitted signal according to the power control parameter, thereby implementing the transmission distance of the transmitted signal of the terminal. It may be far away, and at the same time, when the transmitted signal passes through the base station, it does not interfere with the received signal of the base station.
  • the base station cannot directly transmit the power control parameter to the target terminal, and the power control parameter needs to be first transmitted to the synchronization source terminal of the target terminal, and then the synchronization source terminal Passing the power control parameter to the corresponding The target terminal, where the synchronization source terminal is a terminal within the coverage of the base station, and the terminal can perform D2D communication with the terminal that has interference to the base station outside the coverage of the base station.
  • the power control parameter corresponding to each terminal of the at least one terminal is the same as or different from the power control parameter of the other terminal, and the measurement signal includes a pilot signal, a reference symbol, and/or Other signals known to transmit power.
  • the base station may configure the same or different power control parameters for each terminal.
  • the control signaling overhead may be reduced, and at the same time, the base station may also The signal strength information of each terminal's transmitted measurement signal arriving at the base station configures accurate power control parameters for each terminal, thereby achieving precise control of the transmission power of each terminal.
  • the measurement signals include, but are not limited to, pilot signals, reference symbols, and/or other signals of known transmit power.
  • the sending unit is configured to: directly send the same power control parameter to each of the power control parameters corresponding to each terminal and the power control parameters of the other terminals.
  • a synchronization source terminal corresponding to the terminal so that the synchronization source terminal sends the same power control parameter to the corresponding terminal.
  • the base station when the power control parameters of each terminal are the same as the power control parameters of other terminals, the base station only needs to send the power control parameters to the synchronization source terminal of each terminal.
  • the sending unit is further configured to: when the power control parameter corresponding to each terminal is different from the power parameter of the other terminal, send the terminal identifier information of each terminal and corresponding The power control parameter is sent to the synchronization source terminal corresponding to each terminal, so that the synchronization source terminal sends the power control parameter according to the terminal identification information and the corresponding power control parameter.
  • the base station needs to send the power control parameter together with the terminal identification information of each terminal to the synchronization source terminal of each terminal. So that the synchronization source terminal clarifies the target terminal of the power control parameter.
  • the parameter configuration unit configures corresponding power control parameters for each terminal by using RRC signaling, and the sending unit passes the physical downlink control signal.
  • the channel sends the power control parameters corresponding to each terminal to the synchronization source terminal corresponding to each terminal.
  • a further aspect of the present invention provides a base station, comprising: the power control device according to any one of the preceding claims.
  • a further aspect of the present invention provides a parameter transmission apparatus, for a terminal, comprising: an interaction unit, when receiving a power control parameter sent by a base station, sending the power control parameter to a coverage area of the base station And other terminals that provide synchronization signals by the terminal for the other terminals to use the power control parameters for power control.
  • the terminal can control the power of the transmission signal according to the power control parameter, so that the transmission distance of the transmission signal of the terminal is exhausted. It may be far away, and at the same time, when the transmitted signal passes through the base station, it will not interfere with the received signal of the base station.
  • the interaction unit is configured to: put the power control parameter on the physical terminal directly connected to the shared channel PD2DSCH, or put it in scheduling signaling, or put it in the transmission data and send it to the other terminal.
  • the power control parameters may be transmitted in various manners, including but not limited to the above manners.
  • the interaction unit is specifically configured to: when the received power control parameter is one, and the corresponding terminal identification information is not received, directly send the power control parameter to Each of the other terminals.
  • the interaction unit is specifically configured to: when the received power control parameter is multiple, and when receiving terminal identification information corresponding to each power control parameter, according to the The terminal identification information corresponding to each power control parameter sends the each power control parameter to a corresponding terminal of another terminal.
  • each power corresponding to each terminal is required according to the identification information of each terminal. Control parameters are sent to the corresponding target terminal to avoid sending erroneous power control parameters to the target terminal.
  • a further aspect of the present invention provides a terminal, comprising: the parameter transmission device according to any one of the preceding claims.
  • the UE performs power control to reduce interference with terminals in the base station.
  • 1 is a schematic cross-sectional view showing the relationship between a terminal and a base station outside the coverage of the base station in the related art
  • FIG. 3 is a flow chart showing a power control method for terminal direct communication according to another embodiment of the present invention.
  • FIG. 4 is a schematic flow chart showing a parameter transmission method according to an embodiment of the present invention.
  • Fig. 6 shows a schematic structural view of a parameter transmission device according to an embodiment of the present invention. detailed description
  • a power control method for terminal direct communication includes: Step 202: Determine at least one terminal that has interference to the base station outside a coverage of the base station; Step 204, The base station acquires signal strength information that the measurement signal sent by each terminal in the at least one terminal reaches the base station, and configures a corresponding power control parameter for each terminal according to the signal strength information; Step 206, The base station sends the power control parameter corresponding to each terminal to the synchronization source terminal corresponding to the coverage of the base station corresponding to each terminal, so that the synchronization source terminal sends the power control parameter to the corresponding a terminal, wherein each terminal uses the corresponding power control parameter for power control.
  • a terminal that interferes with the base station outside the coverage of the base station is configured with appropriate power control parameters, so that the terminal controls the power of the transmitted signal according to the power control parameter, thereby implementing the transmission distance of the transmitted signal of the terminal. It may be far away, and at the same time, when the transmitted signal passes through the base station, it does not interfere with the received signal of the base station.
  • the base station cannot directly transmit the power control parameter to the target terminal, and the power control parameter needs to be first transmitted to the synchronization source terminal of the target terminal, and then the synchronization source terminal
  • the power control parameter is transmitted to the corresponding target terminal, where the synchronization source terminal is a terminal within the coverage of the base station, and the terminal can perform D2D communication with the terminal that has interference to the base station outside the coverage of the base station.
  • the power control parameter corresponding to each terminal of the at least one terminal is the same as or different from the power control parameter of the other terminal, and the measurement signal includes a pilot signal, a reference symbol, and/or Other signals known to transmit power.
  • the base station may configure the same or different power control parameters for each terminal.
  • the control signaling overhead may be reduced, and at the same time, the base station may also The signal strength information of each terminal's transmitted measurement signal arriving at the base station configures accurate power control parameters for each terminal, thereby achieving precise control of the transmission power of each terminal.
  • the measurement signals include, but are not limited to, pilot signals, reference symbols, and/or other signals of known transmit power.
  • the base station directly sends the same power control parameter to the synchronization corresponding to each terminal. And a source terminal, where the synchronization source terminal sends the same power control parameter to the corresponding terminal.
  • the base station when the power control parameters of each terminal are the same as the power control parameters of other terminals, the base station only needs to send the power control parameters to the synchronization source terminal of each terminal.
  • the base station when the power control parameter corresponding to each terminal is different from the power parameters of other terminals, the base station sends the terminal identification information of each terminal and the corresponding power control parameter to And the synchronization source terminal corresponding to each terminal, so that the synchronization source terminal sends the power control parameter according to the terminal identification information and the corresponding power control parameter.
  • the base station needs to send the power control parameter together with the terminal identification information of each terminal to the synchronization source terminal of each terminal. So that the synchronization source terminal clarifies the target terminal of the power control parameter.
  • the base station is configured to configure a corresponding power control parameter for each terminal by using RRC signaling, and send, by using a physical downlink control channel, a power control parameter corresponding to each terminal to each of the foregoing The synchronization source terminal corresponding to the terminal.
  • Fig. 3 is a flow chart showing a power control method for terminal direct communication according to another embodiment of the present invention.
  • a power control method for terminal direct communication includes:
  • Step 302 The network (base station) obtains the power control parameter of the terminal by observing the power of the D2D terminal outside the network.
  • the base station can obtain the signal strength of the D2D terminal to the observing base station by measuring the synchronization signal (D2DSS/PD2DSCH) of the out-of-coverage D2D terminal (using UE2 and UE3 as an example), and/or the discovery signal, and/or the communication signal, and Accordingly, power control parameters (including but not limited to power limit P0 and adjustment parameter alpha) are generated such that the out-of-coverage D2D terminal does not interfere with the base station within the cell receiving the UL signal transmitted by the terminal within the coverage.
  • power control parameters including but not limited to power limit P0 and adjustment parameter alpha
  • the base station can set the power control parameters of all the out-of-cover terminals to be the same, the control signaling overhead can be reduced.
  • the power control parameters can also be set for different D2D terminals outside the coverage, so that the interference can be controlled more accurately. .
  • Step 304 The base station configures the power control parameter to the D2D terminal in the cell that provides the synchronization source for the out-of-band D2D terminal (ie, UE2 and UE3).
  • the configuration method can be configured by using RRC signaling and transmitted to the PDCCH through the physical downlink control channel PDCCH.
  • the synchronization source D2D terminal inside, at the same time, the synchronization source D2D terminal transmits the power control parameter to the terminal outside the coverage. If the power control parameter is the same for all terminals, it is not necessary to specify the target terminal when configuring signaling. If the control parameter is UE-specific, the signaling needs to indicate the identifier of the D2D terminal corresponding to the power control parameter.
  • Step 306 The coverage terminal forwards the power control parameter to the external D2D terminal. If the power control parameters are the same for all the terminals, the coverage terminal can directly forward the power control parameters to the D2D terminals outside the coverage; otherwise, if the power control parameters are UE-Specific, the corresponding terminal identifiers need to be The power control parameters are forwarded together. At the same time, the power control parameters can also be placed in the physical terminal directly connected to the shared channel PD2DSCH, the scheduling signaling SA or the data.
  • Step 308 Covering the external D2D terminal, using the power control parameter for power control, and transmitting the D2D signal.
  • the power control parameter may be further forwarded or not. If the control parameter is UE-specific and does not include the parameters corresponding to the D2D terminal it communicates with, it is not forwarded to save signaling overhead.
  • FIG. 4 shows a flow chart of a parameter transmission method according to an embodiment of the present invention.
  • a parameter transmission method includes: Step 402: When receiving a power control parameter sent by a base station, sending the power control parameter to a coverage outside a coverage of the base station And the other terminal that provides the synchronization signal by the terminal, so that the other terminal uses the power control parameter for power control.
  • the terminal can control the power of the transmission signal according to the power control parameter, so that the transmission distance of the transmission signal of the terminal is exhausted. May be far away, while sending a signal
  • the base station also does not interfere with the received signal of the base station.
  • the method further includes: the terminal placing the power control parameter on the physical terminal directly connected to the shared channel PD2DSCH, or placing it in scheduling signaling, or placing the transmission data in the transmission data to be sent to the other terminal.
  • the power control parameters may be transmitted in various manners, including but not limited to the above manners.
  • the power control parameter is directly sent to each of the other terminals. terminal.
  • the terminal identification information corresponding to each power control parameter is received, according to the power control parameter corresponding to each The terminal identification information sends the each power control parameter to a corresponding one of the other terminals.
  • each corresponding power control parameter needs to be sent to a corresponding target according to the identification information of each terminal.
  • the terminal to avoid sending erroneous power control parameters to the target terminal.
  • the power control apparatus 500 for terminal direct communication includes: a determining unit 502, determining at least one terminal that has interference to the base station outside the coverage of the base station; parameter configuration The unit 504 is configured to obtain signal strength information that the measurement signal sent by each terminal in the at least one terminal reaches the base station, and configure a corresponding power control parameter for each terminal according to the signal strength information. And transmitting the power control parameter corresponding to each terminal to the synchronization source terminal corresponding to the coverage of the base station, and sending, by the synchronization source terminal, the power control parameter to the corresponding a terminal, wherein each terminal uses the corresponding power control parameter for power control.
  • a terminal that interferes with the base station outside the coverage of the base station is configured with appropriate power control parameters, so that the terminal controls the power of the transmitted signal according to the power control parameter, thereby implementing the transmission distance of the transmitted signal of the terminal. It may be far away, and at the same time, when the transmitted signal passes through the base station, it does not interfere with the received signal of the base station.
  • the base station cannot directly transmit the power control parameter to the target terminal, and the power control parameter needs to be first transmitted to the synchronization source terminal of the target terminal, and then the synchronization source terminal
  • the power control parameter is transmitted to the corresponding target terminal, where the synchronization source terminal is a terminal within the coverage of the base station, and the terminal can perform D2D communication with the terminal that has interference to the base station outside the coverage of the base station.
  • the power control parameter corresponding to each terminal of the at least one terminal is the same as or different from the power control parameter of the other terminal, and the measurement signal includes a pilot signal, a reference symbol, and/or Other signals known to transmit power.
  • the base station may configure the same or different power control parameters for each terminal.
  • the control signaling overhead may be reduced, and at the same time, the base station may also The signal strength information of each terminal's transmitted measurement signal arriving at the base station configures accurate power control parameters for each terminal, thereby achieving precise control of the transmission power of each terminal.
  • the measurement signals include, but are not limited to, pilot signals, reference symbols, and/or other signals of known transmit power.
  • the sending unit 506 is configured to: directly send the same power control parameter to each of the power control parameters corresponding to each terminal and the power control parameters of the other terminals. a synchronization source terminal corresponding to the terminal, so that the synchronization source terminal sends the same power control parameter to the corresponding terminal.
  • the base station when the power control parameters of each terminal are the same as the power control parameters of other terminals, the base station only needs to send the power control parameters to the synchronization source terminal of each terminal.
  • the sending unit 506 is further configured to: when the power control parameter corresponding to each terminal is different from the power parameters of other terminals, send the terminal identifier information of each terminal and Corresponding power control parameters are sent to the synchronization source terminal corresponding to each terminal, so that the synchronization source terminal sends the power control parameter according to the terminal identification information and the corresponding power control parameter.
  • the base station needs to send the power control parameter together with the terminal identification information of each terminal to the synchronization source terminal of each terminal. So that the synchronization source terminal clarifies the target terminal of the power control parameter.
  • the parameter configuration unit 504 is configured to configure a corresponding power control parameter for each terminal by using RRC signaling, where the sending unit corresponds to each terminal by using a physical downlink control channel PDCCH.
  • the power control parameter is sent to the synchronization source terminal corresponding to each terminal.
  • Fig. 6 shows a schematic structural view of a parameter transmission device according to an embodiment of the present invention.
  • a parameter transmission apparatus 600 includes: an interaction unit 602, when receiving a power control parameter sent by a base station, transmitting the power control parameter to a coverage area of the base station Other terminals that are external and that provide synchronization signals by the terminal for the other terminals to use the power control parameters for power control.
  • the terminal can control the power of the transmission signal according to the power control parameter, so that the transmission distance of the transmission signal of the terminal is exhausted. It may be far away, and at the same time, when the transmitted signal passes through the base station, it will not interfere with the received signal of the base station.
  • the interaction unit 602 is configured to: put the power control parameter on the physical terminal directly connected to the shared channel PD2DSCH, or put it in scheduling signaling, or put it in the transmission data and send the Other terminals.
  • the power control parameters may be transmitted in various manners, including but not limited to the above manners.
  • the interaction unit 602 is specifically configured to: when the received power control parameter is one, and the corresponding terminal identification information is not received, directly The power control parameters are sent to each of the other terminals.
  • the interaction unit 602 is specifically configured to: when the received power control parameters are multiple, and receive terminal identification information corresponding to each power control parameter, according to the The terminal identification information corresponding to each power control parameter sends the each power control parameter to a corresponding terminal of another terminal.
  • each corresponding power control parameter needs to be sent to a corresponding target according to the identification information of each terminal.
  • the terminal to avoid sending erroneous power control parameters to the target terminal.
  • the technical solution of the present invention can perform power control on a terminal that has interference to a base station outside the coverage of the base station, so as to reduce interference with the received signal of the base station.
  • a program product stored on a non-transitory machine readable medium for power control of terminal direct communication, the program product comprising means for causing a computer system to perform the following steps
  • the machine executable instruction determining at least one terminal that has interference to the base station outside the coverage of the base station; the base station acquiring signal strength information that the measurement signal sent by each terminal in the at least one terminal reaches the base station, and Configuring, according to the signal strength information, a power control parameter for each terminal, where the base station sends the power control parameter corresponding to each terminal to the coverage of the base station corresponding to each terminal Synchronizing the source terminal to send the power control parameter to the corresponding terminal by the synchronization source terminal, so that each terminal uses the corresponding power control parameter for power control.
  • a non-volatile machine readable medium storing a program product for power control of terminal direct communication, the program product comprising a machine for causing a computer system to perform the following steps Executing an instruction: determining at least one terminal that has interference to the base station outside the coverage of the base station; the base station acquiring signal strength information that the measurement signal sent by each terminal in the at least one terminal reaches the base station, and according to the The signal strength information is configured to configure a corresponding power control parameter for each terminal; the base station corresponding to each terminal The power control parameter is sent to the synchronization source terminal corresponding to each base station in the coverage of the base station, to send the power control parameter to the corresponding terminal by the synchronization source terminal, for each of the The terminal uses the corresponding power control parameters for power control.
  • a machine readable program the program causing a machine to perform a power control method for terminal direct communication as described in any one of the above aspects.
  • a storage medium storing a machine readable program, wherein the machine readable program causes a machine to perform direct connection communication for a terminal as described in any one of the technical solutions described above Power control method.
  • a program product stored on a non-transitory machine readable medium for parameter transmission, the program product comprising machine executable instructions for causing a computer system to perform the following steps Receiving, when receiving the power control parameter sent by the base station, the power control parameter to other terminals outside the coverage of the base station and providing a synchronization signal by the terminal, for the other terminal to use the Power control parameters for power control.
  • a non-volatile machine readable medium storing a program product for parameter transmission, the program product comprising machine executable instructions for causing a computer system to perform the following steps: receiving Sending, to the power control parameters sent by the base station, the power control parameters to other terminals outside the coverage of the base station and providing synchronization signals by the terminal, for the other terminals to use the power control parameters Perform power control.
  • a machine readable program the program causing a machine to perform a parameter transmission method for terminal direct communication as described in any one of the above aspects.
  • a storage medium storing a machine readable program, wherein the machine readable program causes a machine to perform direct connection communication for a terminal as described in any one of the technical solutions described above Parameter transfer method.

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Abstract

本发明提出了一种用于终端直连通信的功率控制方法和功率控制装置,参数传输方法和参数传输装置,基站和终端,其中,功率控制方法,包括:确定基站的覆盖范围外对基站存在干扰的至少一个终端;基站获取至少一个终端中每个终端发送的测量信号到达基站的信号强度信息,并根据信号强度信息为每个终端配置对应的功率控制参数;基站将每个终端对应的功率控制参数发送至每个终端对应的在基站覆盖范围内的同步源终端,以由同步源终端将功率控制参数发送至对应的终端,以供每个终端使用对应的功率控制参数进行功率控制。通过本发明的技术方案,可以对基站的覆盖范围外的对基站存在干扰的终端进行功率控制,使其减少对基站接收的信号的干扰。

Description

功率控制方法和装置、 参数传输方法和装置、 基站和终端 技术领域
本发明涉及终端技术领域, 具体而言, 涉及一种功率控制方法、 一种 参数传输方法一种功率控制装置、 一种参数传输装置、 一种基站和一种终 端。 背景技术
终端直连通信 (Device to Device , D2D ) 指的是终端不通过网络转 发, 直接进行通信。 由于不需要基站转发, 可以节省大量的移动网络的资 源, 并进一步提升网络容量。
同时, D2D 的主要工作模式包括: 点对点通信和广播通信, 目前 3GPP的研究课题中以广播通信为主。 而 D2D点对点通信与传统蜂窝通信 类似, 广播通信是由一个发送节点和若干接收节点组成, 中间也有可能会 存在多次转发, 由于广播的接收节点多, 且 (发送节点的) 信道相互独 立, 因此, 为了保证广播覆盖范围, 通常釆用最大功率发送。
在 3GPP的讨论中, 目前有两种资源分配方式:
模式 1 : 由网络(基站) 直接调度 D2D UE的通信传输资源。
模式 2: D2D UE自主的在预设的资源池中选择通信传输资源。
针对处于网络覆盖下 ( in-coverage ) 的 D2D UE 和网络覆盖外 ( out- of-coverage ) 的 D2D UE, 进行了不同的设计。
网络覆盖下: 为了降低对 LTE ( Long Term Evolution, 长期演进) 网 络的影响, 并保证传输的可靠性, 通常由基站直接分配资源 (模式 1 ) 或 指定资源池(模式 2 ) 、 并由终端在其中选择资源, 以进行通信。
网络覆盖外: 由于没有基站, 通常釆用模式 2通信。
由于 D2D信号与 LTE信号在同一个频带内相邻的资源块上传输, 且 D2D信号功率远远高于功率控制后的 LTE信号, 因此会对 LTE信号产生 较大干扰。 为此, 目前推出了一种技术方案, 可以控制 D2D 信号的功 率, 降低 D2D信号的发送功率对 LTE信号的较大干扰。
在目前的这种功率控制方法, 主要集中在釆用模式 1 获取资源分配的 情况, 由基站为 UE配置功率控制参数 P0和 alpha。 这种方式沿用了传统 LTE的功率控制方法, 对于连接态的 UE由基站进行功率控制, 可以很好 地解决模式 1中的在覆盖内的 UE对 LTE信号干扰的问题。 但是这种方法 并不能解决在覆盖外的 UE对 LTE的干扰问题。
如图 1 所示, 虚线大圓圈为 D2D通信区域, 比实线的基站覆盖范围 更大。 UE1、 UE2和 UE3为 D2D通信终端, 其中 UE2和 UE3处在覆盖 之外。 UE2 和 UE3 的发送信号如果没有釆用功率控制 (满功率发送) , 可能会干扰基站 BS4接收 UE4的 UL信号。 因此 UE2和 UE3也需要通过 功率控制调制发送功率, 减少对 LTE UE的影响。 UE2和 UE3 的功率控 制目标是在尽可能不干扰 BS接收 LTE UE信号的同时, 以尽可能大的功 率发送信号, 以获得较远的覆盖。 但由于 UE2和 UE3 不在网络覆盖下, 无法由基站配置适合的功率控制参数 P0 和 alpha, 因此, 无法对 UE2 和 UE3进行准确功控。
因此, 如何对基站的覆盖范围外的终端进行功控, 使其减少对基站的 影响, 成为亟待解决的问题。 发明内容
本发明正是基于上述问题, 提出了一种新的技术方案, 可以对基站的 覆盖范围外的对基站存在干扰的 UE 进行功率控制, 使其减少对基站接收 的信号的干扰。
有鉴于此, 本发明的一方面提出了一种用于终端直连通信的功率控制 方法, 包括: 确定基站的覆盖范围外对所述基站存在干扰的至少一个终 端; 所述基站获取所述至少一个终端中每个终端发送的测量信号到达所述 基站的信号强度信息, 并根据所述信号强度信息为所述每个终端配置对应 的功率控制参数; 所述基站将所述每个终端对应的功率控制参数发送至所 述每个终端对应的在所述基站覆盖范围内的同步源终端, 以由所述同步源 终端将所述功率控制参数发送至对应的终端, 以供所述每个终端使用对应 的功率控制参数进行功率控制。
在该技术方案中, 通过获取每个终端发送的测量信号到达基站的信号 强度信息, 可以获得每个终端到基站的参数信息, 如每个终端到基站的距 离、 功耗等, 从而可以根据该参数信息, 为基站覆盖范围外的对基站产生 干扰的终端配置合适的功率控制参数, 进而使该终端根据该功率控制参数 控制发送信号的功率, 从而实现该终端的发送信号的发送距离尽可能远, 同时在该发送信号经过该基站时, 也不会对该基站接收信号产生干扰。
同时, 由于对基站存在干扰的终端位于基站的覆盖范围外, 因此, 基 站无法直接将功率控制参数传递给目标终端, 需将功率控制参数先传递给 目标终端的同步源终端, 再由同步源终端将该功率控制参数传递给对应的 目标终端, 其中, 同步源终端为基站覆盖范围内的终端, 且该终端可以与 基站覆盖范围外的对该基站存在干扰的终端进行 D2D通信。
其中功率控制参数包括但是不限于功率限制和调整参数。
在上述技术方案中, 优选地, 所述至少一个终端中每个终端对应的功 率控制参数与其他终端的功率控制参数均相同或者不相同, 所述测量信号 包括导频信号、 参考符号和 /或其他已知发送功率的信号。
在该技术方案中, 基站可以为每个终端配置相同或不同的功率控制参 数, 当然, 当每个终端的功率控制参数均相同时, 可以减小控制信令的开 销, 同时, 基站也可以根据每个终端的发送的测量信号到达基站的信号强 度信息为每个终端配置准确的功率控制参数, 从而实现对每个终端的发送 功率的精确控制。 其中, 测量信号包括但是不限于导频信号、 参考符号和 /或其他已知发送功率的信号。 在上述技术方案中, 优选地, 在所述每个 终端对应的功率控制参数与其他终端的功率控制参数均相同时, 所述基站 直接发送相同的功率控制参数至所述每个终端对应的同步源终端, 以供所 述同步源终端发送所述相同的功率控制参数至对应的终端。
在该技术方案中, 在每个终端的功率控制参数与其他终端的功率控制 参数都相同时, 基站只需将该功率控制参数发送给每个终端的同步源终端 即可。 在上述技术方案中, 优选地, 在所述每个终端对应的功率控制参数与 其他终端的功率参数不相同时, 所述基站发送所述每个终端的终端标识信 息与对应的功率控制参数至所述每个终端对应的同步源终端, 以供所述同 步源终端根据所述终端标识信息和所述对应的功率控制参数发送所述功率 控制参数。
在该技术方案中, 在每个终端的功率控制参数与其他终端的功率控制 参数不相同时, 基站需将该功率控制参数与每个终端的终端标识信息一同 发送给每个终端的同步源终端, 以便该同步源终端明确功率控制参数的目 标终端。
在上述技术方案中, 优选地, 所述基站通过 RRC ( Radio Resource Control , 无线资源控制协议) 信令为所述每个终端配置对应的功率控制 参数, 通过物理下行控制信道将所述每个终端对应的功率控制参数发送至 所述每个终端对应的所述同步源终端。
本发明的另一方面提出了一种参数传输方法, 用于终端, 包括: 在接 收到基站发送的功率控制参数时, 将所述功率控制参数发送至在所述基站 的覆盖范围外的且由所述终端提供同步信号的其他终端, 以供所述其他终 端使用所述功率控制参数进行功率控制。
在该技术方案中, 通过为基站覆盖范围外的对基站存在干扰的终端提 供功率控制参数, 可以使该终端根据该功率控制参数控制发送信号的功 率, 从而使该终端的发送信号的发送距离尽可能远, 同时在发送信号经过 该基站时, 也不会对该基站接收信号产生干扰。
在上述技术方案中, 优选地, 还包括: 所述终端将所述功率控制参数 放在物理终端直连共享信道 PD2DSCH, 或者放在调度信令, 或者放在传 输数据中发送至所述其他终端。
在该技术方案中, 功率控制参数的传输方式可以有多种, 包括但不限 于以上几种方式。
在上述技术方案中, 优选地, 在接收到的所述功率控制参数为一个 时, 且未接收到对应的终端标识信息时, 直接将所述功率控制参数发送至 所述其他终端中的每个终端。 在该技术方案中, 当只接收到一个功率控制参数, 未接收到对应终端 的标识时, 说明其他终端中的每个终端都对应同一个功率控制参数, 因 而, 终端直接将该功率控制参数发送至其他终端中的每个终端即可。
在上述技术方案中, 优选地, 在接收到的所述功率控制参数为多个 时, 且接收到与每个功率控制参数对应的终端标识信息时, 根据所述与每 个功率控制参数对应的终端标识信息将所述每个功率控制参数发送至其他 终端中对应的终端。
在该技术方案中, 当接收到多个功率控制参数, 且每个功率控制参数 对应的终端标识信息时, 需根据每个终端的标识信息, 将对应的每个功率 控制参数发送至对应的目标终端, 以避免对目标终端发送错误的功率控制 参数。
本发明的又一方面提出了一种用于终端直连通信的功率控制装置, 包 括: 确定单元, 确定基站的覆盖范围外对所述基站存在干扰的至少一个终 端; 参数配置单元, 获取所述至少一个终端中每个终端发送的测量信号到 达所述基站的信号强度信息, 并根据所述信号强度信息为所述每个终端配 置对应的功率控制参数; 发送单元, 将所述每个终端对应的功率控制参数 发送至所述每个终端对应的在所述基站覆盖范围内的同步源终端, 以由所 述同步源终端将所述功率控制参数发送至对应的终端, 以供所述每个终端 使用对应的功率控制参数进行功率控制。
在该技术方案中, 通过获取每个终端发送的测量信号到达所述基站的 信号强度信息, 可以获得每个终端到基站的参数信息, 如每个终端到基站 的距离、 功耗等, 从而可以根据该参数信息, 为基站覆盖范围外的对基站 产生干扰的终端配置合适的功率控制参数, 进而使该终端根据该功率控制 参数控制发送信号的功率, 从而实现该终端的发送信号的发送距离尽可能 远, 同时在该发送信号经过该基站时, 也不会对该基站接收信号产生干 扰。
同时, 由于对基站存在干扰的终端位于基站的覆盖范围外, 因此, 基 站无法直接将功率控制参数传递给目标终端, 需将功率控制参数先传递给 目标终端的同步源终端, 再由同步源终端将该功率控制参数传递给对应的 目标终端, 其中, 同步源终端为基站覆盖范围内的终端, 且该终端可以与 基站覆盖范围外的对该基站存在干扰的终端进行 D2D通信。
在上述技术方案中, 优选地, 所述至少一个终端中每个终端对应的功 率控制参数与其他终端的功率控制参数均相同或者不相同, 所述测量信号 包括导频信号、 参考符号和 /或其他已知发送功率的信号。
在该技术方案中, 基站可以为每个终端配置相同或不同的功率控制参 数, 当然, 当每个终端的功率控制参数均相同时, 可以减小控制信令的开 销, 同时, 基站也可以根据每个终端的发送的测量信号到达基站的信号强 度信息为每个终端配置准确的功率控制参数, 从而实现对每个终端的发送 功率的精确控制。 其中, 测量信号包括但是不限于导频信号、 参考符号和 /或其他已知发送功率的信号。
在上述技术方案中, 优选地, 所述发送单元用于: 在所述每个终端对 应的功率控制参数与其他终端的功率控制参数均相同时, 直接发送相同的 功率控制参数至所述每个终端对应的同步源终端, 以供所述同步源终端发 送所述相同的功率控制参数至对应的终端。
在该技术方案中, 在每个终端的功率控制参数与其他终端的功率控制 参数都相同时, 基站只需将该功率控制参数发送给每个终端的同步源终端 即可。
在上述技术方案中, 优选地, 所述发送单元还用于: 在所述每个终端 对应的功率控制参数与其他终端的功率参数不相同时, 发送所述每个终端 的终端标识信息与对应的功率控制参数至所述每个终端对应的同步源终 端, 以供所述同步源终端根据所述终端标识信息和所述对应的功率控制参 数发送所述功率控制参数。
在该技术方案中, 在每个终端的功率控制参数与其他终端的功率控制 参数不相同时, 基站需将该功率控制参数与每个终端的终端标识信息一同 发送给每个终端的同步源终端, 以便该同步源终端明确功率控制参数的目 标终端。
在上述技术方案中, 优选地, 所述参数配置单元通过 RRC 信令为所 述每个终端配置对应的功率控制参数, 所述发送单元通过物理下行控制信 道将所述每个终端对应的功率控制参数发送至所述每个终端对应的所述同 步源终端。
本发明的再一方面提出了一种基站, 其特征在于, 包括: 如上述技术 方案中任一项所述的功率控制装置。
本发明的再一方面提出了一种参数传输装置, 用于终端, 包括: 交互 单元, 在接收到基站发送的功率控制参数时, 将所述功率控制参数发送至 在所述基站的覆盖范围外的且由所述终端提供同步信号的其他终端, 以供 所述其他终端使用所述功率控制参数进行功率控制。
在该技术方案中, 通过为基站覆盖范围外的对基站存在干扰的终端提 供功率控制参数, 可以使该终端根据该功率控制参数控制发送信号的功 率, 从而使该终端的发送信号的发送距离尽可能远, 同时在发送信号经过 该基站时, 也不会对该基站接收信号产生干扰。
在上述技术方案中, 优选地, 所述交互单元用于: 将所述功率控制参 数放在物理终端直连共享信道 PD2DSCH, 或者放在调度信令, 或者放在 传输数据中发送至所述其他终端。
在该技术方案中, 功率控制参数的传输方式可以有多种, 包括但不限 于以上几种方式。
在上述技术方案中, 优选地, 所述交互单元具体用于: 在接收到的所 述功率控制参数为一个时, 且未接收到对应的终端标识信息时, 直接将所 述功率控制参数发送至所述其他终端中的每个终端。
在该技术方案中, 当只接收到一个功率控制参数, 未接收到对应终端 的标识时, 说明其他终端中的每个终端都对应同一个功率控制参数, 因 而, 终端直接将该功率控制参数发送至其他终端中的每个终端即可。
在上述技术方案中, 优选地, 所述交互单元具体用于: 在接收到的所 述功率控制参数为多个时, 且接收到与每个功率控制参数对应的终端标识 信息时, 根据所述与每个功率控制参数对应的终端标识信息将所述每个功 率控制参数发送至其他终端中对应的终端。
在该技术方案中, 当接收到多个功率控制参数, 且每个功率控制参数 对应的终端标识信息时, 需根据每个终端的标识信息, 将对应的每个功率 控制参数发送至对应的目标终端, 以避免对目标终端发送错误的功率控制 参数。
本发明的再一方面提出了一种终端, 其特征在于, 包括: 如上述技术 方案中任一项所述的参数传输装置。
通过以上技术方案, 可以对基站的覆盖范围外的对基站存在干扰的
UE进行功率控制, 使其减少对基站内的终端的干扰。
附图说明
图 1 示出了相关技术中基站覆盖范围外的终端与基站的关系示意截 图; 的流程示意图;
图 3示出了根据本发明的另一个实施例的用于终端直连通信的功率控 制方法的流程示意图;
图 4示出了根据本发明的实施例的参数传输方法的流程示意图; 结构示意图;
图 6示出了根据本发明的实施例的参数传输装置的结构示意图。 具体实施方式
为了能够更清楚地理解本发明的上述目的、 特征和优点, 下面结合附 图和具体实施方式对本发明进行进一步的详细描述。 需要说明的是, 在不 冲突的情况下, 本申请的实施例及实施例中的特征可以相互组合。
在下面的描述中阐述了很多具体细节以便于充分理解本发明, 但是, 本发明还可以釆用其他不同于在此描述的其他方式来实施, 因此, 本发明 的保护范围并不受下面公开的具体实施例的限制。 的流程示意图。 如图 2所示, 根据本发明的实施例的用于终端直连通信的功率控制方 法, 包括: 步骤 202, 确定基站的覆盖范围外对所述基站存在干扰的至少 一个终端; 步骤 204, 所述基站获取所述至少一个终端中每个终端发送的 测量信号到达所述基站的信号强度信息, 并根据所述信号强度信息为所述 每个终端配置对应的功率控制参数; 步骤 206, 所述基站将所述每个终端 对应的功率控制参数发送至所述每个终端对应的在所述基站覆盖范围内的 同步源终端, 以由所述同步源终端将所述功率控制参数发送至对应的终 端, 以供所述每个终端使用对应的功率控制参数进行功率控制。
在该技术方案中, 通过获取每个终端发送的测量信号到达所述基站的 信号强度信息, 可以获得每个终端到基站的参数信息, 如每个终端到基站 的距离、 功耗等, 从而可以根据该参数信息, 为基站覆盖范围外的对基站 产生干扰的终端配置合适的功率控制参数, 进而使该终端根据该功率控制 参数控制发送信号的功率, 从而实现该终端的发送信号的发送距离尽可能 远, 同时在该发送信号经过该基站时, 也不会对该基站接收信号产生干 扰。
同时, 由于对基站存在干扰的终端位于基站的覆盖范围外, 因此, 基 站无法直接将功率控制参数传递给目标终端, 需将功率控制参数先传递给 目标终端的同步源终端, 再由同步源终端将该功率控制参数传递给对应的 目标终端, 其中, 同步源终端为基站覆盖范围内的终端, 且该终端可以与 基站覆盖范围外的对该基站存在干扰的终端进行 D2D通信。
在上述技术方案中, 优选地, 所述至少一个终端中每个终端对应的功 率控制参数与其他终端的功率控制参数均相同或者不相同, 所述测量信号 包括导频信号、 参考符号和 /或其他已知发送功率的信号。
在该技术方案中, 基站可以为每个终端配置相同或不同的功率控制参 数, 当然, 当每个终端的功率控制参数均相同时, 可以减小控制信令的开 销, 同时, 基站也可以根据每个终端的发送的测量信号到达基站的信号强 度信息为每个终端配置准确的功率控制参数, 从而实现对每个终端的发送 功率的精确控制。 其中, 测量信号包括但是不限于导频信号、 参考符号和 /或其他已知发送功率的信号。 在上述技术方案中, 优选地, 在所述每个终端对应的功率控制参数与 其他终端的功率控制参数均相同时, 所述基站直接发送相同的功率控制参 数至所述每个终端对应的同步源终端, 以供所述同步源终端发送所述相同 的功率控制参数至对应的终端。
在该技术方案中, 在每个终端的功率控制参数与其他终端的功率控制 参数都相同时, 基站只需将该功率控制参数发送给每个终端的同步源终端 即可。
在上述技术方案中, 优选地, 在所述每个终端对应的功率控制参数与 其他终端的功率参数不相同时, 所述基站发送所述每个终端的终端标识信 息与对应的功率控制参数至所述每个终端对应的同步源终端, 以供所述同 步源终端根据所述终端标识信息和所述对应的功率控制参数发送所述功率 控制参数。
在该技术方案中, 在每个终端的功率控制参数与其他终端的功率控制 参数不相同时, 基站需将该功率控制参数与每个终端的终端标识信息一同 发送给每个终端的同步源终端, 以便该同步源终端明确功率控制参数的目 标终端。
在上述技术方案中, 优选地, 所述基站通过 RRC 信令为所述每个终 端配置对应的功率控制参数, 通过物理下行控制信道将所述每个终端对应 的功率控制参数发送至所述每个终端对应的所述同步源终端。
图 3示出了根据本发明的另一个实施例的用于终端直连通信的功率控 制方法的流程示意图。
如图 3所示, 根据本发明的另一个实施例的用于终端直连通信的功率 控制方法, 包括:
步骤 302, 网络(基站) 通过观测网络外 D2D 终端的功率得到该终 端的功控参数。 基站可以通过测量覆盖外的 D2D 终端 (以 UE2 和 UE3 为例) 的同步信号 ( D2DSS/PD2DSCH ) 、 和 /或发现信号、 和 /或通信信 号, 得到该 D2D 终端到达观测基站的信号强度, 并据此生成功率控制参 数 (包括但是不限于功率限值 P0 和调整参数 alpha ) , 从而使覆盖外的 D2D 终端不干扰小区内的基站接收覆盖内的终端发送的 UL 信号。 同 时, 基站可以将所有覆盖外终端的功控参数设置为相同的, 这样可以减小 控制信令的开销; 也可以针对覆盖外的不同的 D2D 终端设置功率控制参 数, 这样可以更加精确地控制干扰。
步骤 304, 基站将该功控参数配置给小区内为覆盖外 D2D 终端 (即 UE2 和 UE3 )提供同步源的 D2D 终端, 配置方法可以通过 RRC信令配 置, 并通过物理下行控制信道 PDCCH 传输给覆盖内的同步源 D2D 终 端, 同时, 同步源 D2D 终端将该功控参数传给覆盖外的终端。 如果该功 控参数是针对所有终端相同的, 配置信令时无需指明目标终端, 如果该控 制参数是 UE-specific的, 信令还需指明与功控参数对应的 D2D 终端的标 识。
步骤 306, 覆盖内终端将功率控制参数转发给覆盖外 D2D 终端。 如 果功控参数针对所有终端都是相同的, 则覆盖内终端可将该功控参数直接 转发给覆盖外的 D2D 终端; 反之, 如果功控参数是 UE-Specific的, 则需 将对应终端标识与功控参数一起转发, 同时, 转发时也可以将功控参数放 在物理终端直连共享信道 PD2DSCH中、 调度信令 SA或数据中。
步骤 308, 覆盖外 D2D 终端釆用该功控参数进行功率控制, 并发送 D2D信号。
当然, 覆盖外 D2D 终端收到功率控制参数后, 如果功率控制参数是 UE-common, 可以进一步转发功控参数, 也可以不转发。 如果控制参数是 UE-specific 的, 且不包括与其通信 D2D 终端对应的参数, 则不转发, 以 节省信令开销。
图 4示出了根据本发明的实施例的参数传输方法的流程示意图。
如图 4 所示, 根据本发明的实施例的参数传输方法, 包括: 步骤 402, 在接收到基站发送的功率控制参数时, 将所述功率控制参数发送至 在所述基站的覆盖范围外的且由所述终端提供同步信号的其他终端, 以供 所述其他终端使用所述功率控制参数进行功率控制。
在该技术方案中, 通过为基站覆盖范围外的对基站存在干扰的终端提 供功率控制参数, 可以使该终端根据该功率控制参数控制发送信号的功 率, 从而使该终端的发送信号的发送距离尽可能远, 同时在发送信号经过 该基站时, 也不会对该基站接收信号产生干扰。
在上述技术方案中, 优选地, 还包括: 所述终端将所述功率控制参数 放在物理终端直连共享信道 PD2DSCH, 或者放在调度信令, 或者放在传 输数据中发送至所述其他终端。
在该技术方案中, 功率控制参数的传输方式可以有多种, 包括但不限 于以上几种方式。
在上述技术方案中, 优选地, 在接收到的所述功率控制参数为一个 时, 且未接收到对应的终端标识信息时, 直接将所述功率控制参数发送至 所述其他终端中的每个终端。
在该技术方案中, 当只接收到一个功率控制参数, 未接收到对应终端 的标识时, 说明其他终端中的每个终端都对应同一个功率控制参数, 因 而, 终端直接将该功率控制参数发送至其他终端中的每个终端即可。
在上述技术方案中, 优选地, 在接收到的所述功率控制参数为多个 时, 且接收到与每个功率控制参数对应的终端标识信息时, 根据所述与每 个功率控制参数对应的终端标识信息将所述每个功率控制参数发送至其他 终端中对应的终端。
在该技术方案中, 当接收到多个功率控制参数, 且每个功率控制参数 对应的终端标识信息时, 需根据每个终端的标识信息, 将对应的每个功率 控制参数发送至对应的目标终端, 以避免对目标终端发送错误的功率控制 参数。 结构示意图。
如图 5所示, 根据本发明的实施例的用于终端直连通信的功率控制装 置 500, 包括: 确定单元 502, 确定基站的覆盖范围外对所述基站存在干 扰的至少一个终端; 参数配置单元 504, 获取所述至少一个终端中每个终 端发送的测量信号到达所述基站的信号强度信息, 并根据所述信号强度信 息为所述每个终端配置对应的功率控制参数; 发送单元 506, 将所述每个 终端对应的功率控制参数发送至所述每个终端对应的在所述基站覆盖范围 内的同步源终端, 以由所述同步源终端将所述功率控制参数发送至对应的 终端, 以供所述每个终端使用对应的功率控制参数进行功率控制。
在该技术方案中, 通过获取每个终端发送的测量信号到达所述基站的 信号强度信息, 可以获得每个终端到基站的参数信息, 如每个终端到基站 的距离、 功耗等, 从而可以根据该参数信息, 为基站覆盖范围外的对基站 产生干扰的终端配置合适的功率控制参数, 进而使该终端根据该功率控制 参数控制发送信号的功率, 从而实现该终端的发送信号的发送距离尽可能 远, 同时在该发送信号经过该基站时, 也不会对该基站接收信号产生干 扰。
同时, 由于对基站存在干扰的终端位于基站的覆盖范围外, 因此, 基 站无法直接将功率控制参数传递给目标终端, 需将功率控制参数先传递给 目标终端的同步源终端, 再由同步源终端将该功率控制参数传递给对应的 目标终端, 其中, 同步源终端为基站覆盖范围内的终端, 且该终端可以与 基站覆盖范围外的对该基站存在干扰的终端进行 D2D通信。
在上述技术方案中, 优选地, 所述至少一个终端中每个终端对应的功 率控制参数与其他终端的功率控制参数均相同或者不相同, 所述测量信号 包括导频信号、 参考符号和 /或其他已知发送功率的信号。
在该技术方案中, 基站可以为每个终端配置相同或不同的功率控制参 数, 当然, 当每个终端的功率控制参数均相同时, 可以减小控制信令的开 销, 同时, 基站也可以根据每个终端的发送的测量信号到达基站的信号强 度信息为每个终端配置准确的功率控制参数, 从而实现对每个终端的发送 功率的精确控制。 其中, 测量信号包括但是不限于导频信号、 参考符号和 /或其他已知发送功率的信号。
在上述技术方案中, 优选地, 所述发送单元 506用于: 在所述每个终 端对应的功率控制参数与其他终端的功率控制参数均相同时, 直接发送相 同的功率控制参数至所述每个终端对应的同步源终端, 以供所述同步源终 端发送所述相同的功率控制参数至对应的终端。
在该技术方案中, 在每个终端的功率控制参数与其他终端的功率控制 参数都相同时, 基站只需将该功率控制参数发送给每个终端的同步源终端 即可。 在上述技术方案中, 优选地, 所述发送单元 506还用于: 在所述每个 终端对应的功率控制参数与其他终端的功率参数不相同时, 发送所述每个 终端的终端标识信息与对应的功率控制参数至所述每个终端对应的同步源 终端, 以供所述同步源终端根据所述终端标识信息和所述对应的功率控制 参数发送所述功率控制参数。
在该技术方案中, 在每个终端的功率控制参数与其他终端的功率控制 参数不相同时, 基站需将该功率控制参数与每个终端的终端标识信息一同 发送给每个终端的同步源终端, 以便该同步源终端明确功率控制参数的目 标终端。
在上述技术方案中, 优选地, 所述参数配置单元 504通过 RRC信令 为所述每个终端配置对应的功率控制参数, 所述发送单元通过物理下行控 制信道 PDCCH将所述每个终端对应的功率控制参数发送至所述每个终端 对应的所述同步源终端。
图 6示出了根据本发明的实施例的参数传输装置的结构示意图。
如图 6 所示, 根据本发明的实施例的参数传输装置 600, 包括: 交互 单元 602, 在接收到基站发送的功率控制参数时, 将所述功率控制参数发 送至在所述基站的覆盖范围外的且由所述终端提供同步信号的其他终端, 以供所述其他终端使用所述功率控制参数进行功率控制。
在该技术方案中, 通过为基站覆盖范围外的对基站存在干扰的终端提 供功率控制参数, 可以使该终端根据该功率控制参数控制发送信号的功 率, 从而使该终端的发送信号的发送距离尽可能远, 同时在发送信号经过 该基站时, 也不会对该基站接收信号产生干扰。
在上述技术方案中, 优选地, 所述交互单元 602用于: 将所述功率控 制参数放在物理终端直连共享信道 PD2DSCH, 或者放在调度信令, 或者 放在传输数据中发送至所述其他终端。
在该技术方案中, 功率控制参数的传输方式可以有多种, 包括但不限 于以上几种方式。
在上述技术方案中, 优选地, 所述交互单元 602具体用于: 在接收到 的所述功率控制参数为一个时, 且未接收到对应的终端标识信息时, 直接 将所述功率控制参数发送至所述其他终端中的每个终端。
在该技术方案中, 当只接收到一个功率控制参数, 未接收到对应终端 的标识时, 说明其他终端中的每个终端都对应同一个功率控制参数, 因 而, 终端直接将该功率控制参数发送至其他终端中的每个终端即可。
在上述技术方案中, 优选地, 所述交互单元 602具体用于: 在接收到 的所述功率控制参数为多个时, 且接收到与每个功率控制参数对应的终端 标识信息时, 根据所述与每个功率控制参数对应的终端标识信息将所述每 个功率控制参数发送至其他终端中对应的终端。
在该技术方案中, 当接收到多个功率控制参数, 且每个功率控制参数 对应的终端标识信息时, 需根据每个终端的标识信息, 将对应的每个功率 控制参数发送至对应的目标终端, 以避免对目标终端发送错误的功率控制 参数。
以上结合附图详细说明了本发明的技术方案, 通过本发明的技术方 案, 可以对基站的覆盖范围外的对基站存在干扰的终端进行功率控制, 使 其减少对基站接收信号的干扰。
根据本发明的实施方式, 还提供了一种存储在非易失性机器可读介质 上的程序产品, 用于终端直连通信的功率控制, 所述程序产品包括用于使 计算机***执行以下步骤的机器可执行指令: 确定基站的覆盖范围外对所 述基站存在干扰的至少一个终端; 所述基站获取所述至少一个终端中每个 终端发送的测量信号到达所述基站的信号强度信息, 并根据所述信号强度 信息为所述每个终端配置对应的功率控制参数; 所述基站将所述每个终端 对应的功率控制参数发送至所述每个终端对应的在所述基站覆盖范围内的 同步源终端, 以由所述同步源终端将所述功率控制参数发送至对应的终 端, 以供所述每个终端使用对应的功率控制参数进行功率控制。
根据本发明的实施方式, 还提供了一种非易失机器可读介质, 存储有 用于终端直连通信的功率控制的程序产品, 所述程序产品包括用于使计算 机***执行以下步骤的机器可执行指令: 确定基站的覆盖范围外对所述基 站存在干扰的至少一个终端; 所述基站获取所述至少一个终端中每个终端 发送的测量信号到达所述基站的信号强度信息, 并根据所述信号强度信息 为所述每个终端配置对应的功率控制参数; 所述基站将所述每个终端对应 的功率控制参数发送至所述每个终端对应的在所述基站覆盖范围内的同步 源终端, 以由所述同步源终端将所述功率控制参数发送至对应的终端, 以 供所述每个终端使用对应的功率控制参数进行功率控制。
根据本发明的实施方式, 还提供了一种机器可读程序, 所述程序使机 器执行如上所述技术方案中任一所述的用于终端直连通信的功率控制方 法。
根据本发明的实施方式, 还提供了一种存储有机器可读程序的存储介 质, 其中, 所述机器可读程序使得机器执行如上所述技术方案中任一所述 的用于终端直连通信的功率控制方法。
根据本发明的实施方式, 还提供了一种存储在非易失性机器可读介质 上的程序产品, 用于参数传输, 所述程序产品包括用于使计算机***执行 以下步骤的机器可执行指令: 在接收到基站发送的功率控制参数时, 将所 述功率控制参数发送至在所述基站的覆盖范围外的且由所述终端提供同步 信号的其他终端, 以供所述其他终端使用所述功率控制参数进行功率控 制。
根据本发明的实施方式, 还提供了一种非易失机器可读介质, 存储有 用于参数传输的程序产品, 所述程序产品包括用于使计算机***执行以下 步骤的机器可执行指令: 在接收到基站发送的功率控制参数时, 将所述功 率控制参数发送至在所述基站的覆盖范围外的且由所述终端提供同步信号 的其他终端, 以供所述其他终端使用所述功率控制参数进行功率控制。
根据本发明的实施方式, 还提供了一种机器可读程序, 所述程序使机 器执行如上所述技术方案中任一所述的用于终端直连通信的参数传输方 法。
根据本发明的实施方式, 还提供了一种存储有机器可读程序的存储介 质, 其中, 所述机器可读程序使得机器执行如上所述技术方案中任一所述 的用于终端直连通信的参数传输方法。
以上所述仅为本发明的优选实施例而已, 并不用于限制本发明, 对于 本领域的技术人员来说, 本发明可以有各种更改和变化。 凡在本发明的精 神和原则之内, 所作的任何修改、 等同替换、 改进等, 均应包含在本发明 的保护范围之内。

Claims

权 利 要 求 书
1. 一种功率控制方法, 用于终端直连通信, 其特征在于, 包括: 确定基站的覆盖范围外对所述基站存在干扰的至少一个终端; 所述基站获取所述至少一个终端中每个终端发送的测量信号到达所述 基站的信号强度信息, 并根据所述信号强度信息为所述每个终端配置对应 的功率控制参数;
所述基站将所述每个终端对应的功率控制参数发送至所述每个终端对 应的在所述基站覆盖范围内的同步源终端, 以由所述同步源终端将所述功 率控制参数发送至对应的终端, 以供所述每个终端使用对应的功率控制参 数进行功率控制。
2. 根据权利要求 1 所述的功率控制方法, 其特征在于, 所述至少一 个终端中每个终端对应的功率控制参数与其他终端的功率控制参数均相同 或者不相同, 所述测量信号包括导频信号、 参考符号和 /或其他已知发送 功率的信号。
3. 根据权利要求 2 所述的功率控制方法, 其特征在于, 在所述每个 终端对应的功率控制参数与其他终端的功率控制参数均相同时, 所述基站 直接发送相同的功率控制参数至所述每个终端对应的同步源终端, 以供所 述同步源终端发送所述相同的功率控制参数至对应的终端。
4. 根据权利要求 2 所述的功率控制方法, 其特征在于, 在所述每个 终端对应的功率控制参数与其他终端的功率参数不相同时, 所述基站发送 所述每个终端的终端标识信息与对应的功率控制参数至所述每个终端对应 的同步源终端, 以供所述同步源终端根据所述终端标识信息和所述对应的 功率控制参数发送所述功率控制参数。
5. 根据权利要求 1 至 4 中任一项所述的功率控制方法, 其特征在 于, 所述基站通过 RRC信令为所述每个终端配置对应的功率控制参数, 通过物理下行控制信道将所述每个终端对应的功率控制参数发送至所述每 个终端对应的所述同步源终端。
6. 一种参数传输方法, 用于终端, 其特征在于, 包括: 在接收到基站发送的功率控制参数时, 将所述功率控制参数发送至在 所述基站的覆盖范围外的且由所述终端提供同步信号的其他终端, 以供所 述其他终端使用所述功率控制参数进行功率控制。
7. 根据权利要求 6所述的参数传输方法, 其特征在于, 还包括: 所述终端将所述功率控制参数放在物理终端直连共享信道, 或者放在 调度信令, 或者放在传输数据中发送至所述其他终端。
8. 根据权利要求 6 或 7 所述的参数传输方法, 其特征在于, 在接收 到的所述功率控制参数为一个时, 且未接收到对应的终端标识信息时, 直 接将所述功率控制参数发送至所述其他终端中的每个终端。
9. 根据权利要求 6 或 7 所述的参数传输方法, 其特征在于, 在接收 到的所述功率控制参数为多个时, 且接收到与每个功率控制参数对应的终 端标识信息时, 根据所述与每个功率控制参数对应的终端标识信息将所述 每个功率控制参数发送至其他终端中对应的终端。
10. 一种功率控制装置, 用于终端直连通信, 其特征在于, 包括: 确定单元, 确定基站的覆盖范围外对所述基站存在干扰的至少一个终 端;
参数配置单元, 获取所述至少一个终端中每个终端发送的测量信号到 达所述基站的信号强度信息, 并根据所述信号强度信息为所述每个终端配 置对应的功率控制参数;
发送单元, 将所述每个终端对应的功率控制参数发送至所述每个终端 对应的在所述基站覆盖范围内的同步源终端, 以由所述同步源终端将所述 功率控制参数发送至对应的终端, 以供所述每个终端使用对应的功率控制 参数进行功率控制。
11. 根据权利要求 10 所述的功率控制装置, 其特征在于, 所述至少 一个终端中每个终端对应的功率控制参数与其他终端的功率控制参数均相 同或者不相同, 所述测量信号包括导频信号、 参考符号和 /或其他已知发 送功率的信号。
12. 根据权利要求 10 所述的功率控制装置, 其特征在于, 所述发送 单元用于: 在所述每个终端对应的功率控制参数与其他终端的功率控制参数均相 同时, 直接发送相同的功率控制参数至所述每个终端对应的同步源终端, 以供所述同步源终端发送所述相同的功率控制参数至对应的终端。
13. 根据权利要求 11 所述的功率控制装置, 其特征在于, 所述发送 单元还用于:
在所述每个终端对应的功率控制参数与其他终端的功率参数不相同 时, 发送所述每个终端的终端标识信息与对应的功率控制参数至所述每个 终端对应的同步源终端, 以供所述同步源终端根据所述终端标识信息和所 述对应的功率控制参数发送所述功率控制参数。
14. 根据权利要求 10至 13中任一项所述的功率控制装置, 其特征在 于, 所述参数配置单元通过 RRC 信令为所述每个终端配置对应的功率控 制参数, 所述发送单元通过物理下行控制信道将所述每个终端对应的功率 控制参数发送至所述每个终端对应的所述同步源终端。
15. 一种基站, 其特征在于, 包括: 如权利要求 10至 14中任一项所 述的功率控制装置。
16. 一种参数传输装置, 用于终端, 其特征在于, 包括:
交互单元, 在接收到基站发送的功率控制参数时, 将所述功率控制参 数发送至在所述基站的覆盖范围外的且由所述终端提供同步信号的其他终 端, 以供所述其他终端使用所述功率控制参数进行功率控制。
17. 根据权利要求 16 所述的参数传输装置, 其特征在于, 所述交互 单元用于:
将所述功率控制参数放在物理终端直连共享信道, 或者放在调度信 令, 或者放在传输数据中发送至所述其他终端。
18. 根据权利要求 16或 17所述的参数传输装置, 其特征在于, 所述 交互单元具体用于:
在接收到的所述功率控制参数为一个时, 且未接收到对应的终端标识 信息时, 直接将所述功率控制参数发送至所述其他终端中的每个终端。
19. 根据权利要求 16或 17所述的参数传输装置, 其特征在于, 所述 交互单元具体用于: 在接收到的所述功率控制参数为多个时, 且接收到与每个功率控制参 数对应的终端标识信息时, 根据所述与每个功率控制参数对应的终端标识 信息将所述每个功率控制参数发送至其他终端中对应的终端。
20. 一种终端, 其特征在于, 包括: 如权利要求 16至 19中任一项所 述的参数传输装置。
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