WO2015180170A1 - 一种d2d通信中发射功率的控制方法及设备 - Google Patents
一种d2d通信中发射功率的控制方法及设备 Download PDFInfo
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- WO2015180170A1 WO2015180170A1 PCT/CN2014/078998 CN2014078998W WO2015180170A1 WO 2015180170 A1 WO2015180170 A1 WO 2015180170A1 CN 2014078998 W CN2014078998 W CN 2014078998W WO 2015180170 A1 WO2015180170 A1 WO 2015180170A1
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- 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
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- 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
- H04W52/38—TPC being performed in particular situations
- H04W52/383—TPC being performed in particular situations power control in peer-to-peer links
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- 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
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- 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
- H04W52/242—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters taking into account path loss
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0473—Wireless resource allocation based on the type of the allocated resource the resource being transmission power
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W8/00—Network data management
- H04W8/005—Discovery of network devices, e.g. terminals
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- 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
- H04W52/10—Open loop power control
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/02—Terminal devices
Definitions
- the present invention relates to the field of wireless communication technologies, and in particular, to a method and a device for controlling transmission power in D2D communication. Background technique
- D2D ProSe Device to Device Proximity Service
- 3GPP 3rd Generation Partnership Project
- LTE Long Term Evolution
- the communication process for realizing the D2D ProSe service can be referred to as Device to Device (D2D) communication.
- the user equipment currently performing D2D communication uses a single maximum power transmission when transmitting D2D signals. For example, if the user equipment performing D2D communication supports a transmission power of 23 dBm, the user equipment transmits with a transmission power of 23 dBm when transmitting the D2D signal.
- the D2D signal transmitted by the user equipment performing D2D communication and the uplink signal transmitted by the user equipment performing uplink communication are multiplexed by frequency division multiplexing, as shown in FIG. Figure 1 shows a 10 MHz bandwidth (hysical resource block pair (PRB Pair), 1 ms length of time. As shown in Figure 1, there are 50 PRBs in the 10 MHz bandwidth, among them, The first to Nth PRBs, the Mth to the 50th PRBs are used to transmit uplink signals, and the N+1th to M-1th PRBs are used to transmit D2D signals.
- PRB Pair Physical resource block pair
- the extended cyclic prefix Extended Cyclic Prefix, Extended CP
- 12 orthogonal frequency division multiplexing are transmitted in lms time.
- the normal Cyclic Prefix (Normal CP) subframe format is used, that is, 14 OFDM symbols are transmitted in the lms time.
- the subframe format for transmitting the D2D signal is different from the subframe format for transmitting the uplink signal, so there is carrier interference between the D2D signal and the uplink signal.
- the network device Since the D2D signal transmitted by the user equipment 1 and the uplink signal transmitted by the user equipment 2 are not aligned in time (14 symbols and 12 symbols cannot be aligned), the network device causes the uplink signal transmitted by the user equipment 2 to be received by the network device. At the same time, the leakage signal of the D2D signal transmitted by the user equipment 1 is received, causing inter-carrier interference.
- the user equipment 1 transmits the D2D signal and transmits with the maximum power, and the inter-carrier interference is large, which causes the accuracy of the uplink signal received by the network device to the user equipment 2 to be reduced. Summary of the invention
- Embodiments of the present invention provide a method and a device for controlling transmit power in D2D communication, so as to improve the accuracy of receiving uplink signals by a network device.
- a method for controlling transmit power in device-to-device D2D communication includes: determining control information, where the control information includes first subframe information and performing on a first subframe corresponding to the first subframe information a first power control mode of power control, and second subframe control information and a second power control mode for performing power control on a second subframe corresponding to the second subframe information;
- Dissipating the control information so that the user equipment of the D2D communication transmits the D2D signal according to the transmit power determined according to the first power control manner on the first subframe corresponding to the first subframe information, and is in And transmitting, by using the transmit power determined according to the second power control manner, the D2D signal on the second subframe corresponding to the second subframe information.
- determining control information includes:
- first subframe information and first power control parameters for performing power control on a first subframe corresponding to the first subframe information, and second subframe information and corresponding to the second subframe information a second power control parameter for performing power control on the second subframe, where a value of the first power control parameter is different from a value of the second power control parameter;
- Dissipating the control information so that the user equipment of the D2D communication transmits the D2D signal according to the transmit power determined according to the first power control manner on the first subframe corresponding to the first subframe information, and And transmitting, by using the transmit power determined according to the second power control manner, the D2D signal on the second subframe corresponding to the second subframe information, including: Dissipating the first subframe information, the first power control parameter, the second subframe information, and the second power control parameter, so that the user equipment of the D2D communication is in the first subframe information Transmitting a D2D signal according to the transmit power determined according to the first power control parameter, and using the second power according to the second subframe corresponding to the second subframe information, on the corresponding first subframe.
- the transmit power determined by the control parameters transmits a D2D signal.
- determining control information includes:
- Dissipating the control information so that the user equipment of the D2D communication transmits the D2D signal according to the transmit power determined according to the first power control manner on the first subframe corresponding to the first subframe information, and And transmitting, by using the transmit power determined according to the second power control manner, the D2D signal on the second subframe corresponding to the second subframe information, including:
- the power control parameters include:
- the path loss compensation coefficient and the target received power of the network device receiving the uplink signal or the path loss compensation coefficient, the power offset amount, and the target receiving power of the network device receiving the uplink signal.
- a second aspect of the present invention provides a method for controlling transmit power in device-to-device D2D communication, including: acquiring control information delivered by a network device, where the control information includes first subframe information and a first subframe information corresponding to the first subframe information First power control mode for power control on one subframe, and second Subframe information and a second power control mode for performing power control on a second subframe corresponding to the second subframe information;
- a D2D signal according to a transmit power determined according to the first power control manner on a first subframe corresponding to the first subframe information, and corresponding to the second subframe information.
- the D2D signal is transmitted on the second subframe using the transmit power determined according to the second power control mode.
- acquiring control information delivered by the network device includes:
- first subframe information sent by the network device Acquiring first subframe information sent by the network device, and first power control parameters for performing power control on the first subframe corresponding to the first subframe information, and second subframe information and The second power control parameter of the power control of the second subframe corresponding to the second subframe information, where the value of the first power control parameter is different from the value of the second power control parameter;
- acquiring control information delivered by the network device includes:
- determining the transmit power according to the power control parameter includes:
- the transmit power of the transmitted D2D signal is determined according to the path loss estimation, the target receiving power of the network device that is sent by the network device, the path receiving power that is sent by the network device, and the power offset that is sent by the network device.
- a network device in a third aspect, includes a determining unit and a sending unit, where
- the determining unit is configured to determine control information, where the control information includes first subframe information, a first power control manner for performing power control on a first subframe corresponding to the first subframe information, and a second subframe Information and a second power control mode for performing power control on a second subframe corresponding to the second subframe information;
- the sending unit is configured to send the control information determined by the determining unit, so that the user equipment of the D2D communication is used according to the first subframe in a first subframe corresponding to the first subframe information. Transmitting power determined by the power control mode to transmit a D2D signal, and corresponding to the second subframe information The D2D signal is transmitted on the second subframe using the transmit power determined according to the second power control mode.
- the determining unit is specifically configured to determine control information as follows:
- first subframe information and first power control parameters for performing power control on a first subframe corresponding to the first subframe information, and second subframe information and corresponding to the second subframe information a second power control parameter for performing power control on the second subframe, where a value of the first power control parameter is different from a value of the second power control parameter;
- the sending unit is configured to send the control information according to the following manner, so that the user equipment of the D2D communication uses the first power control according to the first subframe corresponding to the first subframe information. Transmitting the D2D signal by using the determined transmit power, and transmitting the D2D signal according to the transmit power determined according to the second power control manner on the second subframe corresponding to the second subframe information: Subframe information, the first power control parameter, the second subframe information, and the second power control parameter, so that the user equipment of the D2D communication is in the first subframe corresponding to the first subframe information. Transmitting, by using a transmit power determined according to the first power control parameter, a D2D signal, and using a transmit power determined according to the second power control parameter on a second subframe corresponding to the second subframe information The D2D signal is transmitted.
- the determining unit is specifically configured to determine control information as follows:
- the sending unit is configured to send the control information according to the following manner, so that the user equipment of the D2D communication uses the first power control according to the first subframe corresponding to the first subframe information.
- the mode determined transmit power transmits the D2D signal, and on the second subframe corresponding to the second subframe information, the D2D signal is transmitted by using the transmit power determined according to the second power control mode: And transmitting the first subframe information, the first power control parameter, the second subframe information, and the indication information, so that the user equipment of the D2D communication is in the first corresponding to the first subframe information.
- the maximum transmit power transmits a D2D signal.
- the power control parameters determined by the determining unit include:
- the path loss compensation coefficient and the target received power of the network device receiving the uplink signal or the path loss compensation coefficient, the power offset amount, and the target receiving power of the network device receiving the uplink signal.
- a fourth aspect provides a user equipment, where the user equipment includes an acquiring unit and a transmitting unit, where
- the acquiring unit is configured to acquire control information that is sent by the network device, where the control information includes a first subframe information and a first power control manner for performing power control on a first subframe corresponding to the first subframe information, where And a second power control mode for performing power control on the second subframe information and the second subframe corresponding to the second subframe information;
- the transmitting unit is configured to: according to the control information acquired by the acquiring unit, transmit a D2D signal by using a transmit power determined according to the first power control manner on a first subframe corresponding to the first subframe information, And transmitting a D2D signal using the transmit power determined according to the second power control mode on the second subframe corresponding to the second subframe information.
- the acquiring unit is specifically configured to obtain, by using the following method, control information delivered by the network device:
- first subframe information sent by the network device Acquiring first subframe information sent by the network device, and first power control parameters for performing power control on the first subframe corresponding to the first subframe information, and second subframe information and The second power control parameter of the power control of the second subframe corresponding to the second subframe information, where the value of the first power control parameter is different from the value of the second power control parameter;
- the transmitting unit is specifically configured to: according to the control information, in the following manner Transmitting a D2D signal according to the transmit power determined according to the first power control manner on a first subframe corresponding to the frame information, and using the second power according to the second subframe corresponding to the second subframe information
- the transmit power determined by the control mode transmits the D2D signal:
- the acquiring unit is specifically configured to obtain, by using the following method, control information delivered by the network device:
- the first subframe information sent by the network device and the first power control parameter for performing power control on the first subframe corresponding to the first subframe information, and the second subframe information and the indication are The indication information of the D2D signal transmitted by the maximum transmit power supported by the user equipment of the D2D communication on the second subframe corresponding to the second subframe information;
- the transmitting unit is specifically configured to: according to the control information, transmit a D2D signal according to a transmit power determined according to the first power control manner on a first subframe corresponding to the first subframe information, and Transmitting the D2D signal using the transmit power determined according to the second power control mode on the second subframe corresponding to the second subframe information:
- the transmit power used by the transmitting unit to transmit the D2D signal is specifically determined to be: Determining the transmit power of the transmitted D2D signal according to the path loss estimate, the target received power of the network device sent by the network device, and the path loss compensation coefficient sent by the network device; or
- the transmit power of the transmitted D2D signal is determined according to the path loss estimation, the target receiving power of the network device that is sent by the network device, the path receiving power that is sent by the network device, and the power offset that is sent by the network device.
- a communication device including a transmitter, a processor, a memory, and a bus, wherein the transmitter and the memory are both connected to the processor through the bus,
- the memory is configured to store program code executed by the processor
- the processor is configured to invoke a program stored in the memory to determine control information, where the control information includes first subframe information and a first power for performing power control on a first subframe corresponding to the first subframe information a control mode, and second subframe control information and a second power control mode for performing power control on the second subframe corresponding to the second subframe information;
- the transmitter is configured to send the control information determined by the processor, so that the user equipment of the D2D communication uses the first power control manner according to the first subframe corresponding to the first subframe information.
- the determined transmit power transmits a D2D signal, and the D2D signal is transmitted using the transmit power determined according to the second power control mode on a second subframe corresponding to the second subframe information.
- the processor is specifically configured to determine control information in the following manner: determining first subframe information and in a first subframe corresponding to the first subframe information a first power control parameter for performing power control, and second subframe information and a second power control parameter for performing power control on a second subframe corresponding to the second subframe information, where the first power The value of the control parameter is different from the value of the second power control parameter;
- the transmitter is specifically configured to send the control information according to the following manner, so that the user equipment of the D2D communication uses the first power control manner according to the first subframe corresponding to the first subframe information.
- the transmit power determined by the control parameters transmits a D2D signal.
- the processor is specifically configured to determine control information by: determining first subframe information and in a first subframe corresponding to the first subframe information a first power control parameter for performing power control, and second subframe information and an indication indicating a maximum transmit power to transmit a D2D signal supported by a user equipment using D2D communication on a second subframe corresponding to the second subframe information Information
- the transmitter is specifically configured to send the control information according to the following manner, so that the user equipment of the D2D communication uses the first power control manner according to the first subframe corresponding to the first subframe information.
- the transmit power determined by the first power control parameter transmits a D2D signal, and on a second subframe corresponding to the second subframe information, the D2D signal is transmitted using a maximum transmit power supported by the user equipment of the D2D communication.
- the power control parameters determined by the processor include:
- the path loss compensation coefficient and the target received power of the network device receiving the uplink signal or the path loss compensation coefficient, the power offset amount, and the target receiving power of the network device receiving the uplink signal.
- a communication device including a receiver, a processor, a memory, a transmitter, and a bus, wherein the receiver, the transmitter, and the memory pass through the bus and the The processors are connected,
- the memory is configured to store program code executed by the processor;
- the receiver is configured to acquire control information that is sent by the network device, where the control information includes first subframe information and a first power control manner for performing power control on a first subframe corresponding to the first subframe information, where And a second power control mode for performing power control on the second subframe information and the second subframe corresponding to the second subframe information;
- the processor is configured to invoke a program stored in the memory, and control, according to the control information acquired by the receiver, the transmitter to use the first subframe according to the first subframe information. Transmitting the D2D signal by the transmit power determined by the first power control mode, and transmitting the D2D signal by using the transmit power determined according to the second power control mode on the second subframe corresponding to the second subframe information.
- the receiver is specifically configured to obtain control information delivered by the network device as follows:
- first subframe information sent by the network device Acquiring first subframe information sent by the network device, and first power control parameters for performing power control on the first subframe corresponding to the first subframe information, and second subframe information and The second power control parameter of the power control of the second subframe corresponding to the second subframe information, where the value of the first power control parameter is different from the value of the second power control parameter;
- the processor is specifically configured to control, according to the control information acquired by the receiver, the transmitter to use according to the first power control manner on a first subframe corresponding to the first subframe information. Determining the transmit power to transmit the D2D signal, and transmitting, on the second subframe corresponding to the second subframe information, the D2D signal according to the transmit power determined according to the second power control manner: according to the first subframe information And the first power control parameter, controlling, by the transmitter, to transmit a D2D signal on a first subframe corresponding to the first subframe information, using a transmit power determined according to the first power control parameter;
- Controlling, by the second subframe information and the second power control parameter, the transmitter to determine, according to the second power control parameter, on a second subframe corresponding to the second subframe information Transmit power, transmit D2D signal.
- the receiver is specifically configured to be as follows Obtain control information delivered by the network device:
- the first subframe information sent by the network device and the first power control parameter for performing power control on the first subframe corresponding to the first subframe information, and the second subframe information and the indication are The indication information of the D2D signal transmitted by the maximum transmit power supported by the user equipment of the D2D communication on the second subframe corresponding to the second subframe information;
- the processor is specifically configured to control, according to the control information acquired by the receiver, the transmitter to use according to the first power control manner on a first subframe corresponding to the first subframe information. Determining the transmit power to transmit the D2D signal, and transmitting, on the second subframe corresponding to the second subframe information, the D2D signal according to the transmit power determined according to the second power control manner: according to the first subframe information And controlling, by the first power control parameter, the transmitter to transmit a D2D signal using a transmit power determined according to the first power control parameter on a first subframe corresponding to the first subframe information;
- the transmitter controlling, according to the second subframe information and the indication information, the transmitter to transmit a D2D signal by using a maximum transmit power supported by a user equipment of the D2D communication on a second subframe corresponding to the second subframe information.
- the processor controls the transmit power used by the transmitter to transmit the D2D signal, which is specifically determined as follows: According to the path loss estimation, the network The network device sent by the device receives the target received power of the uplink signal and the path loss compensation coefficient sent by the network device, and determines the transmit power of the transmitted D2D signal; or
- the transmit power of the transmitted D2D signal is determined according to the path loss estimation, the target receiving power of the network device that is sent by the network device, the path receiving power that is sent by the network device, and the power offset that is sent by the network device.
- the network device determines and sends the control information of the D2D communication user equipment for power control, where the control information includes the first subframe information and the first subframe information.
- the control information includes the first subframe information and the first subframe information.
- the second power control mode, the user equipment of the D2D communication receives the control information determined and delivered by the network device, and may determine the transmission of the transmitted D2D signal by using different power control modes in the first subframe and the second subframe, respectively.
- the transmit power used by the D2D communication device to transmit the D2D signal can be flexibly controlled according to the actual situation, thereby limiting the interference of the D2D signal to the uplink signal received by the network device, and improving the accuracy of the network device receiving the uplink signal.
- FIG. 1 is a schematic diagram showing frequency division multiplexing of uplink signals of D2D signals and uplink communication in D2D communication in the prior art
- FIG. 2 is a system architecture diagram of a method for controlling a transmit power in D2D communication according to an embodiment of the present invention
- 3A is a flowchart showing a first implementation of a method for controlling transmit power in D2D communication according to Embodiment 1 of the present invention
- FIG. 3B is a flowchart showing a second implementation of a method for controlling transmit power in D2D communication according to Embodiment 1 of the present invention
- FIG. 3C is a first schematic diagram showing D2D subframe division and power control parameters corresponding to D2D subframes according to Embodiment 1 of the present invention
- 3D is a third implementation flowchart of a method for controlling transmit power in D2D communication according to Embodiment 1 of the present invention.
- FIG. 3E is a second schematic diagram of D2D subframe division and power control parameters corresponding to D2D subframes according to Embodiment 1 of the present invention.
- FIG. 4A is a flowchart of a first implementation of a method for controlling transmit power in D2D communication according to Embodiment 2 of the present invention
- 4B is a flowchart of a first implementation of a method for controlling transmit power in D2D communication according to Embodiment 2 of the present invention
- 4C is a flowchart of a first implementation of a method for controlling transmit power in D2D communication according to Embodiment 2 of the present invention
- FIG. 5 is a schematic structural diagram of a network device according to Embodiment 3 of the present invention.
- FIG. 6 is a schematic structural diagram of a user equipment according to Embodiment 4 of the present invention.
- FIG. 7 is a schematic structural diagram of a communication device according to Embodiment 5 of the present invention.
- FIG. 8 is a schematic structural diagram of a communication device according to an embodiment of the present invention. detailed description
- FIG. 2 is a system architecture of a method for controlling a transmit power in D2D communication according to an embodiment of the present invention.
- the user equipment 1 communicates with the network equipment, and the user equipment 1 transmits an uplink signal, and the network equipment receives an uplink signal transmitted by the user equipment 1, which is called uplink communication.
- the device-to-device communication performed by the user equipment 2 and the user equipment 3 is D2D communication.
- Uplink communication between the user equipment 1 and the network device, and D2D communication between the user equipment 2 and the user equipment 3 may use the same spectrum resource; the spectrum resource used by the user equipment 2 and the user equipment 3 for D2D communication is network equipment allocation of.
- the network device in the embodiment of the present invention may be an evolved base station (eNB) in an LTE system, or a base station (NB) in a Universal Mobile Telecommunications System (UMTS). It may be other network devices that communicate with user equipment and perform resource scheduling for user equipment.
- eNB evolved base station
- NB base station
- UMTS Universal Mobile Telecommunications System
- Embodiments of the present invention provide a method for controlling transmit power in D2D communication, where the network device determines And transmitting, by the user equipment of the D2D communication, the control information of the power control, and the user equipment of the D2D communication performs power control on the transmit power used for transmitting the D2D signal according to the control information determined and delivered by the network device, thereby limiting the D2D signal to the network.
- the interference of the uplink signal received by the device improves the reliability of the network device receiving the uplink signal.
- the rate control method and equipment are described in detail.
- the first embodiment of the present invention may be used to perform the method for controlling the transmit power in the D2D communication provided by the embodiment of the present invention.
- the first device in the embodiment of the present invention may be the communication with the user equipment in the existing communication system.
- the network device that performs resource scheduling for the user equipment but is not limited thereto, and may be other devices capable of performing corresponding functions.
- the power control method is described as an example, and is of course not limited.
- FIG. 3A is a flowchart showing a method for controlling transmission power in D2D communication according to an embodiment of the present invention. As shown in FIG. 3A, the method includes:
- the network device determines control information for performing power control of the user equipment of the D2D communication.
- the control information determined by the network device in the embodiment of the present invention includes: first subframe information and a first power control mode for performing power control on a first subframe corresponding to the first subframe information, and second subframe information and A second power control mode for performing power control on the second subframe corresponding to the two subframe information.
- S102 The network device sends the control information determined in S101.
- the network device may send the determined control information by using the signaling, so that the user equipment of the D2D communication determines, according to the control information, the first subframe corresponding to the first subframe information according to the first power control manner.
- the transmit power transmits a D2D signal, and the D2D signal is transmitted using the transmit power determined according to the second power control mode on the second subframe corresponding to the second subframe information.
- the network device determines and sends the control information of the power control of the user equipment of the D2D communication, where the control information includes the first Subframe information and a first power control mode for performing power control on a first subframe corresponding to the first subframe information, and second subframe information and power control on a second subframe corresponding to the second subframe information
- the second power control mode, the user equipment of the D2D communication receives the control information determined and delivered by the network device, and may determine the transmission of the transmitted D2D signal by using different power control modes in the first subframe and the second subframe, respectively.
- the transmit power used by the D2D communication device to transmit the D2D signal can be flexibly controlled according to the actual situation, thereby limiting the interference of the D2D signal to the uplink signal received by the network device, and improving the accuracy of the network device receiving the uplink signal.
- the network device may determine the control information according to the manner in which the user equipment of the D2D communication performs power control. For example, in the embodiment of the present invention, the network device may determine and send the subframe information and the user equipment of the D2D communication corresponds to the subframe information. The power control parameter of the power control is performed on the subframe, so that the user equipment of the D2D communication determines the transmit power of the transmitted D2D signal according to the received power control parameter corresponding to the subframe information and the subframe information, and then transmits the D2D by using the determined transmit power. signal.
- the power control includes two methods: open loop power control and closed loop power control.
- whether the network device can perform power control according to the D2D communication user equipment is an open loop power control mode or a closed loop power control mode, and is determined and down.
- Send the corresponding power control parameters For example, when the open loop power control mode is used, the network device can determine power control parameters such as target receiving power and path loss compensation coefficient of the network device receiving the uplink signal; when using the closed loop power control mode, the network device can determine, for example, network device receiving Power control parameters such as target received power, path loss compensation coefficient, and power offset of the uplink signal.
- the power control parameters sent by the network device are different, and the manner in which the user equipment of the D2D communication determines the transmit power of the D2D signal is also different.
- the user equipment of the D2D communication determines the transmission power of the D2D signal.
- the network equipment issues power control parameters such as the target receiving power and the path loss compensation coefficient of the network device receiving the uplink signal
- the user equipment of the D2D communication can be used.
- Ring power control mode According to the path loss estimation, the target receiving power of the uplink signal received by the network device delivered by the network device, and the path loss compensation coefficient sent by the network device, the transmit power of the transmitted D2D signal is determined according to the following formula (1).
- P D2D p . +a-PL Equation (J)
- ⁇ is the transmit power of the transmitted D2D signal determined by the D2D communication device, ⁇ .
- It is the target receiving power of the network device receiving the uplink signal, " e 4 , 5 , 6 , 7 , 8 , 09 , is the path loss compensation coefficient, which is calculated by the user equipment of the D2D communication from the network device to the user equipment of the D2D communication.
- the path loss estimate (Pathloss Estimate) may be the difference between the transmit power of the reference signal transmitted by the system and the received power of the reference signal detected by the user equipment.
- the user equipment of the D2D communication determines the transmission power of the D2D signal to transmit two:
- the user equipment of the D2D communication may adopt the closed loop power control mode, according to the path loss estimation, the network device.
- the delivered network device receives the target received power of the uplink signal, the path loss compensation coefficient sent by the network device, and the power offset amount, and determines the transmit power of the transmitted D2D signal according to the following formula (2).
- ⁇ is the transmit power of the transmitted D2D signal determined by the D2D communication device, ⁇ .
- the target receiving power of the network device receiving the uplink signal " e 4 , 5 , 6 , 7 , 8 , 09 , is the path loss compensation coefficient, which is the power offset amount, which is calculated by the user equipment of the D2D communication from the network device to Path loss Estimate between user equipments of D2D communication.
- PL may be the difference between the transmission power of the reference signal transmitted by the system and the received power of the reference signal detected by the user equipment.
- the network device receives the target received power ⁇ of the uplink signal.
- the path loss compensation coefficient, and the power offset amount ⁇ ⁇ , are all set by the network device according to the actual communication conditions and sent to the user equipment of the D2D communication, which is obtained by the user equipment.
- the D2D communication device is used to determine the D2D signal by using an open loop power control mode.
- the network device determines and delivers the power control parameter of the D2D communication user equipment for power control, and the D2D communication user equipment performs power control on the transmit power of the transmitted D2D signal according to the power control parameter determined and delivered by the network device. . Therefore, in the embodiment of the present invention, the user equipment of the D2D communication may not transmit the D2D signal with the maximum transmit power, and the user equipment of the D2D communication controls the transmit power of the D2D signal in the D2D communication according to different control powers. Controlling, and further limiting, the interference of the D2D signal on the uplink signal received by the network device.
- the network device may determine a power control parameter with a smaller value, so that the transmit power of the D2D signal determined by the user equipment of the D2D communication is relatively small, and thus The interference of the D2D signal on the uplink signal received by the network device is reduced, and the reliability of the network device receiving the uplink signal is improved.
- the power control parameter may be used to determine the transmission on some or all of the subframes. Power and power control.
- the transmit power of the D2D signal is controlled. Compared with the maximum transmit power of the D2D signal in the prior art, the transmit power of the D2D signal is reduced, and the D2D signal can be limited to the network device. The interference of the uplink signal, but if the transmission power of the D2D signal is reduced, the range of the D2D communication of the user equipment will also decrease, which affects the coverage of the D2D signal.
- the embodiment of the invention provides a D2D transmission signal capable of reducing the interference of the D2D signal to the uplink signal received by the network device and ensuring the coverage of the D2D signal to a certain extent.
- the method of controlling the transmit power is not limited to a D2D transmission signal.
- the network device may determine that the value of the power control parameter in the partial subframe is relatively small, so that the transmit power of the D2D signal in the partial subframe is also relatively small, so as to reduce the D2D signal to receive by the network device.
- the interference of the uplink signal is determined; and the value of the power control parameter in the other part of the subframe is determined to be relatively large, so that the transmission power of the D2D signal is relatively large to ensure coverage of the D2D signal.
- the network device can determine that all of the subframes in the subframe for transmitting the D2D signal determine the transmission power of the D2D signal by means of power control.
- the subframe for transmitting the D2D signal is divided into at least two categories, and the power control parameters corresponding to the subframes of different classes are different, so that the user equipment of the D2D communication can determine the transmission of different D2D signals. power.
- the D2D signal in the subframe with relatively small transmit power has less interference to the uplink signal received by the network device, and protects the uplink signal received by the network device; the transmit power when transmitting the D2D signal is relatively
- the D2D signal on the larger sub-frame can guarantee the coverage of the D2D signal.
- the control information determined by the network device in the following includes the first subframe information and the first power control parameter for performing power control on the first subframe corresponding to the first subframe information, and the second subframe information and the second The second power control parameter for performing power control on the second subframe corresponding to the subframe information is described as an example.
- the value of the first power control parameter is different from the value of the second power control parameter.
- FIG. 3B is a flowchart of still another method for performing power control on transmit power of a D2D signal in D2D communication according to an embodiment of the present invention. As shown in FIG. 3B, the method includes:
- the network device determines the first subframe information and the second subframe information.
- the first subframe corresponding to the first subframe information and the second subframe corresponding to the second subframe information all use the transmit power determined according to the power control parameter to transmit the D2D signal.
- the network device determines a first power control parameter for performing power control on the first subframe corresponding to the first subframe information.
- S202b The network device determines, in the second subframe corresponding to the second subframe information, that the power control is performed. Two power control parameters.
- the subframe in the D2D communication system includes a transmission subframe between a user equipment for transmitting an uplink signal to a network device, and a D2D transmission subframe for transmitting a D2D signal.
- the network device divides the D2D transmission subframe used for transmitting the D2D signal into a first subframe and a second subframe, where the first subframe uses the first power control parameter, and the D2D signal is used.
- the transmit power is controlled; the second sub-frame uses the second power control parameter to control the transmit power of the D2D signal, as shown in Figure 3C.
- the value of the first power control parameter is different from the value of the second power control parameter, so that the transmit power of the D2D signal transmitted by the first subframe and the D2D signal transmitted by the second subframe are used.
- the transmission power is different. Therefore, the transmission power of the D2D signal is relatively small, and the interference of the D2D signal to the uplink signal received by the network device can be reduced; and the transmission power of the D2D signal is relatively large, and the coverage of the D2D signal can be guaranteed.
- the embodiment of the present invention may determine that the target receiving power of the network device in the first power control parameter corresponding to the first subframe is that the path loss compensation coefficient is “1, and the user equipment determined by the D2D communication determines the usage.
- the transmit power of the first subframe to transmit the D2D signal is:
- the embodiment of the present invention can determine that the target receiving power of the network device receiving the uplink signal in the second power control parameter corresponding to the second subframe is 2 , and the path loss compensation coefficient is “1, then D2D.
- the network device determines p c ⁇ p 2 , and therefore, the user of the D2D communication
- the device uses the first subframe to transmit the transmit power of the D2D signal.
- the transmit power of the D2D signal is small, so the first subframe and the first power control parameter can be adopted.
- the uplink signal received by the network device is protected to reduce interference of the D2D signal; and the second subframe and the second power control parameter can ensure coverage of the D2D signal.
- execution order of S202a and S202b in the embodiment of the present invention is in no particular order. It should be further noted that, in the embodiment of the present invention, which part of the subframe is determined by the network device as the first subframe, and which part of the subframe is determined as the second subframe may be determined according to actual communication requirements.
- the number of the categorized sub-frames is not limited to the two types, and may be more than two types.
- the embodiment of the present invention is shown in FIG. 3C for illustrative purposes only, and is not limited thereto.
- the network device sends the first subframe information determined in S201, the second subframe information, the first power control parameter determined in S202a, and the second power control parameter determined in S202b, so that the user equipment of the D2D communication is in the first And transmitting, on the first subframe corresponding to the one subframe information, the D2D signal by using the transmit power determined according to the first power control parameter, and determining, by using the second power control parameter, on the second subframe corresponding to the second subframe information.
- the transmit power transmits a D2D signal.
- the transmit power of the D2D signal transmitted by the first subframe is different from the transmit power of the D2D signal transmitted by the second subframe, so that the transmit power of the D2D signal is relatively small, and the D2D signal can be reduced.
- the network device may determine that a partial subframe in a subframe for transmitting a D2D signal uses a power control manner for determining a transmission power according to a power control parameter, and another portion of the subframe is still communicated by D2D.
- the maximum transmit power supported by the user equipment is used as the power control mode of the transmit power of the D2D signal.
- the user equipment of the D2D signal determines the transmit power of the D2D signal transmitted by the corresponding subframe according to the subframe information determined and delivered by the network device and the corresponding power control parameter.
- the D2D signal is transmitted on the partial power by using the transmit power of the power control to reduce the interference of the D2D signal on the uplink signal received by the network device, and the reliability of the network device to receive the uplink signal is improved.
- the D2D signal is transmitted at the maximum transmit power supported by the user equipment of the D2D communication on another part of the subframe, and the coverage of the D2D signal can be guaranteed.
- FIG. 3D is a flowchart of a method for performing power control on a transmit power of a D2D signal in a pair of D2D communication according to an embodiment of the present invention. As shown in FIG. 3D, the method includes:
- S301 The network device determines the first subframe information and the second subframe information.
- the first subframe corresponding to the first subframe information uses the transmit power determined according to the power control parameter to transmit the D2D signal
- the second subframe corresponding to the second subframe information uses the maximum transmit power to transmit the D2D signal
- S302a The network device determines, by using the first subframe information, the first subframe to perform power control. Power control parameters.
- the network device determines indication information indicating that the maximum transmit power of the D2D signal is supported by the user equipment supported by the D2D communication on the second subframe corresponding to the second subframe information.
- the network device sends the first subframe information and the second subframe information determined in S301, the first power control parameter determined in S302a, and the indication information determined in S302b, so that the user equipment of the D2D communication is in the first sub And transmitting, on the first subframe corresponding to the frame information, the D2D signal by using the transmit power determined according to the first power control parameter; and transmitting, on the second subframe corresponding to the second subframe information, the D2D signal by using the maximum transmit power.
- the subframe in the D2D communication system includes a transmission subframe between a user equipment for transmitting an uplink signal to a network device, and a D2D transmission subframe for transmitting a D2D signal.
- the network device divides the D2D transmission subframe used for transmitting the D2D signal into a first subframe and a second subframe, where the first subframe corresponding to the first subframe information is used according to the power control parameter.
- the determined transmit power transmits the D2D signal
- the second subframe corresponding to the second subframe information transmits the D2D signal using the maximum transmit power, as shown in FIG. 3E.
- the transmit power of the D2D signal transmitted by using the first subframe is determined according to the first power control parameter, and the D2D signal transmitted by using the second subframe is still transmitted at the maximum transmit power, and then used.
- the transmit power of the first sub-frame transmitting the D2D signal is different from the transmit power of the D2D signal transmitted by the second sub-frame.
- the transmit power of the D2D signal transmitted by the first subframe is relatively small, which can reduce the interference of the D2D signal on the uplink signal received by the network device, and improve the reliability of the network device receiving the uplink signal.
- the transmit power of the D2D signal transmitted by the second subframe is the maximum power, and the transmit power of the D2D signal is relatively large, which can ensure the coverage of the D2D signal.
- which part of the subframe is determined by the network device as the first subframe, and which part of the subframe is determined as the second subframe may be determined according to actual communication requirements, and the determined first sub-frame
- the frame may also be divided into different categories, and the first subframes of different classes correspond to different power control parameters.
- the embodiment of the present invention is shown in FIG. 3E for illustrative purposes only and is not limited.
- the network device determines and sends the subframe information, and the subframe corresponding to the subframe information enters
- the power control parameter of the line power control and the indication information of the maximum transmit power of the user equipment indicating the D2D communication are enabled, so that the user equipment can determine, according to the subframe information and the power control parameter determined and delivered by the network device, in a part of the subframe. Transmitting the transmit power of the D2D signal; transmitting the D2D signal with the maximum transmit power directly according to the indication information on another partial subframe.
- the user equipment of the D2D communication may not need to transmit the D2D signal by using the maximum transmit power supported by the user equipment of the 2D communication in all subframes, and the user equipment of the D2D communication determines to use the D2D signal according to the power control parameter.
- the transmit power can be adapted to the subframe information and power control parameters determined and delivered by the network device, and the D2D signal is transmitted on the part of the transmit power that is smaller than the maximum transmit power supported by the user equipment of the D2D communication, thereby limiting the D2D signal to the network device.
- the interference of the received uplink signal improves the reliability of the network device receiving the uplink signal.
- the D2D signal can be transmitted with the maximum transmit power to ensure the coverage of the D2D signal.
- the method for controlling the transmit power in the D2D communication provided by the embodiment of the present invention is used as an example.
- the second device may be a user equipment in D2D communication, and of course
- the user equipment in D2D communication will be described as an example.
- FIG. 4A is a flowchart showing a method for controlling transmission power in D2D communication performed by a user equipment for D2D communication according to an embodiment of the present invention. As shown in FIG. 4A, the method includes:
- S401 The user equipment of the D2D communication acquires control information sent by the network device.
- the user equipment of the D2D communication can obtain the control information sent by the network device by analyzing the instructions sent by the network device.
- the control information acquired by the user equipment of the D2D communication in the embodiment of the present invention includes the first subframe information and the first power control mode for performing power control on the first subframe corresponding to the first subframe information, and the second subframe information. And a second power control mode for performing power control on the second subframe corresponding to the second subframe information.
- the control information acquired by the user equipment of the D2D communication in the embodiment of the present invention may include the subframe control information and the power control parameter for performing power control on the subframe corresponding to the subframe information, and the power of the user equipment of the D2D communication according to the subframe information and the subframe information.
- Control parameters to determine the transmit power of the transmitted D2D signal The rate, in turn, uses the determined transmit power to transmit the D2D signal.
- the power control parameter may include whether the power control mode of the network device according to the user equipment of the D2D communication is an open loop power control mode or a closed loop power control mode, and different power control parameters are sent.
- the user equipment of the D2D communication can obtain power control parameters such as the target receiving power and the path loss compensation coefficient that are determined and sent by the network device, such as the network device receiving the uplink signal;
- the user equipment of the D2D communication may obtain power control parameters such as target receiving power, path loss compensation coefficient, and power offset amount determined and delivered by the network device, such as the network device receiving the uplink signal.
- the user equipment of the D2D communication transmits the D2D signal according to the transmit power determined according to the first power control manner on the first subframe corresponding to the first subframe information according to the control information acquired in S401, and the second subframe information is used.
- a D2D signal is transmitted on the corresponding second subframe using the transmit power determined according to the second power control mode.
- the user equipment of the D2D communication can transmit the D2D signal according to the different control information sent by the network device and the transmission power determined by using different power control modes.
- the open loop control mode or the closed loop control mode may be used to determine the transmit power of the D2D signal, which may be specifically implemented as follows:
- the transmission power is determined according to the path loss estimation, the target receiving power of the network device that is sent by the network device, and the path loss compensation coefficient sent by the network device; or
- the transmit power is determined according to the path loss estimation, the target receiving power of the network device that is sent by the network device, the path receiving power that is sent by the network device, and the power offset that is sent by the network device.
- the user equipment of the D2D communication acquires the control information of the power control performed by the user equipment of the D2D communication delivered by the network device, where the control information includes the first subframe information and Power control on the first subframe corresponding to the first subframe information
- the first power control mode, and the second subframe information and the second power control mode for performing power control on the second subframe corresponding to the second subframe information the user equipment of the D2D communication may be in the first subframe and
- the second sub-frame uses different power control methods to determine the transmit power of the transmitted D2D signal, and realizes the dynamic adjustment control of the transmit power used for transmitting the D2D signal in the D2D communication, that is, the user equipment of the D2D communication in the prior art is simple.
- the user equipment of the D2D communication in the embodiment of the present invention can flexibly control the transmission power used by the D2D communication device to transmit the D2D signal according to actual conditions, thereby limiting the uplink signal received by the D2D signal to the network device.
- the interference increases the accuracy of the network device receiving the uplink signal.
- the D2D communication of the user equipment of the D2D communication is no longer simply transmitting the D2D signal according to the maximum transmission power, and the transmission power of the user equipment of the D2D communication to the D2D signal can be adapted to different power control issued by the network equipment.
- the parameters, corresponding to different transmit powers enable power control of the transmit power of the D2D signal transmitted in the D2D communication, thereby limiting the interference of the D2D signal to the uplink signal received by the network device, but if the transmit power of the D2D signal is reduced, the D2D The range of the D2D communication performed by the user equipment of the communication is also reduced, which affects the coverage of the D2D signal.
- the embodiments of the present invention provide a method for controlling the transmit power of a D2D transmit signal that can reduce the interference of the D2D signal to the uplink signal received by the network device and ensure the coverage of the D2D signal to a certain extent.
- FIG. 4B is a schematic diagram of a method for controlling a transmit power of a D2D signal by a D2D communication user equipment according to an embodiment of the present invention. As shown in FIG. 4B, the method includes:
- S501 The user equipment of the D2D communication acquires the first subframe information and the second subframe information that are sent by the network device.
- the subframe for transmitting the D2D signal determined by the user equipment of the D2D communication includes at least two types of subframes, and each of the at least two types of subframes performs power control according to the power control parameter.
- Determining the transmit power, the subframe information to be acquired by the user equipment of the D2D communication includes the first subframe information and the second subframe information, and the first subframe corresponding to the first subframe information and the second subframe corresponding to the second subframe information
- the frames each transmit a D2D signal using the transmit power determined in accordance with the power control parameters.
- the user equipment of the D2D communication acquires a first power control parameter for performing power control on a first subframe corresponding to the first subframe information that is sent by the network device, and performs a second subframe that is corresponding to the second subframe information.
- the second power control parameter of the power control, the value of the first power control parameter is different from the value of the second power control parameter.
- the D2D signal is transmitted according to the transmit power determined according to the first power control parameter, according to the first subframe information and the first power control parameter, in the first subframe corresponding to the first subframe information, and according to the second subframe.
- the D2D signal is transmitted according to the transmit power determined according to the first power control parameter, and is used in the second subframe corresponding to the second subframe information.
- the transmit power determined by the second power control parameter transmits the D2D signal, so the transmit power of the D2D signal transmitted by the first subframe is different from the transmit power of the D2D signal transmitted by the second subframe, and thus, the transmit power of the D2D signal Relatively small, it can reduce the interference of the D2D signal to the uplink signal received by the network device; if the transmit power of the D2D signal is relatively large, the coverage of the D2D signal can be guaranteed.
- FIG. 4C is a schematic diagram of a method for controlling a transmit power of a D2D signal by a D2D communication user equipment according to an embodiment of the present invention. As shown in FIG. 4C, the method includes:
- the user equipment of the D2D communication acquires the first subframe information and the second subframe information that are sent by the network device.
- the first subframe corresponding to the first subframe information is used to transmit the D2D signal according to the transmit power determined according to the power control parameter, and the second subframe corresponding to the second subframe information is still supported by the user equipment of the D2D communication.
- the maximum transmit power is used as the transmit power of the D2D signal.
- S602a The user equipment of the D2D communication acquires the first power control parameter for performing power control on the first subframe corresponding to the first subframe information that is sent by the network device.
- S602b The user equipment of the D2D communication acquires the second subframe information that is sent by the network device, and the indication information that indicates the maximum transmit power of the D2D signal that is supported by the user equipment that uses the D2D communication on the second subframe corresponding to the second subframe information.
- the execution order of S602a and S602b in the embodiment of the present invention is in no particular order.
- S603a The D2D signal is transmitted according to the transmit power determined according to the first power control parameter on the first subframe corresponding to the first subframe information according to the first subframe information and the first power control parameter.
- the D2D signal is transmitted by using the maximum transmit power supported by the user equipment of the D2D communication on the second subframe corresponding to the second subframe information according to the second subframe information and the indication information.
- the transmit power of the D2D signal transmitted by using the first subframe is determined according to the first power control parameter, and the D2D signal transmitted by using the second subframe is still transmitted at the maximum transmit power, and then used.
- the transmit power of the first sub-frame transmitting the D2D signal is different from the transmit power of the D2D signal transmitted by the second sub-frame.
- the transmit power of the D2D signal transmitted by the first subframe is relatively small, which can reduce the interference of the D2D signal on the uplink signal received by the network device, and improve the reliability of the network device receiving the uplink signal.
- the transmit power of the D2D signal transmitted by the second subframe is the maximum power, and the transmit power of the D2D signal is relatively large, which can ensure the coverage of the D2D signal.
- the user equipment of the D2D communication in the first embodiment of the present invention performs the control process of the transmit power of the D2D signal, which is applicable to the control implementation of the transmit power of the D2D signal provided by the second embodiment of the present invention.
- the second embodiment is not sufficiently similar, reference may be made to the description of the first embodiment and related drawings.
- the user equipment of the D2D communication may not need to transmit the D2D signal with the maximum transmit power supported by the user equipment of the 2D communication in all subframes, and the user equipment of the D2D communication sends the power control parameter in some or all subframes.
- the D2D signal is transmitted by using the transmit power determined according to the power control parameter, thereby limiting the interference of the D2D signal on the uplink signal received by the network device, and improving the reliability of the network device receiving the uplink signal.
- the network device 500 is provided with the determining unit 501 and the sending unit 502, where the network device includes a determining unit 501 and a sending unit 502, as shown in FIG. 5, where the method for controlling the transmit power in the D2D communication is provided.
- a determining unit 501 configured to determine control information, where the control information includes the first subframe information and is at the first a first power control mode for performing power control on the first subframe corresponding to the subframe information, and a second power control mode for performing power control on the second subframe corresponding to the second subframe information.
- the sending unit 502 is configured to send the control information determined by the determining unit 501, so that the user equipment of the D2D communication transmits the D2D using the transmit power determined according to the first power control manner on the first subframe corresponding to the first subframe information. And transmitting a D2D signal using the transmit power determined according to the second power control mode on the second subframe corresponding to the second subframe information.
- the determining unit 501 is specifically configured to determine, according to the following manner, control information for power control of the user equipment of the D2D communication:
- the sending unit 502 is configured to send the control information in the following manner, so that the user equipment of the D2D communication transmits the D2D according to the transmit power determined according to the first power control manner on the first subframe corresponding to the first subframe information. And transmitting, on the second subframe corresponding to the second subframe information, the D2D signal by using the transmit power determined according to the second power control manner:
- the transmit power determined by a power control parameter transmits a D2D signal, and on the second subframe corresponding to the second subframe information, the D2D signal is transmitted using the transmit power determined according to the second power control parameter.
- the determining unit 501 is specifically configured to determine control information in the following manner: determining the first subframe information and performing power on the first subframe corresponding to the first subframe information. Controlling the first power control parameter, and the second subframe information and the indication information indicating the maximum transmit power transmission D2D signal supported by the user equipment using the D2D communication on the second subframe corresponding to the second subframe information.
- the sending unit 502 is specifically configured to send the control information as follows to enable the user of the D2D communication.
- the device transmits the D2D signal according to the transmit power determined according to the first power control manner on the first subframe corresponding to the first subframe information, and uses the second power according to the second subframe corresponding to the second subframe information.
- the transmit power determined by the control mode transmits the D2D signal:
- the parameter determined transmit power transmits the D2D signal, and on the second subframe corresponding to the second subframe information, the D2D signal is transmitted using the maximum transmit power supported by the user equipment of the D2D communication.
- determining the power control parameters determined by the unit 501 includes:
- the path loss compensation coefficient and the target received power of the network device receiving the uplink signal are combined. Or the path loss compensation coefficient, the power offset, and the target received power of the network device receiving the uplink signal.
- the network device provided by the embodiment of the present invention can be used to perform the control method for implementing the transmit power of the D2D communication involved in the first embodiment and the accompanying drawings. Therefore, the related description of the network device provided by the embodiment of the present invention is not detailed enough. The related description of the implementation of the first embodiment and its drawings will not be repeated here.
- the network device determines and sends the control information of the power control of the user equipment of the D2D communication, where the control information includes the first subframe information and the first subframe corresponding to the first subframe information. a first power control mode for performing power control, and a second power control mode for performing power control on the second subframe corresponding to the second subframe information, where the user equipment of the D2D communication receives the network device determination And transmitting the control information, respectively, using different power control modes on the first subframe and the second subframe to determine the transmit power of the transmitted D2D signal, thereby realizing dynamic adjustment of the transmit power used for transmitting the D2D signal in the D2D communication Controlling, that is, the user equipment of the D2D communication in the prior art transmits the D2D signal with the maximum transmit power, and the user equipment of the D2D communication in the embodiment of the present invention can flexibly control the transmission when the D2D communication device transmits the D2D signal according to actual conditions.
- the power in turn, can
- the user equipment 600 is provided in the embodiment of the present invention.
- the user equipment includes an obtaining unit 601 and a transmitting unit 602, where
- the acquiring unit 601 is configured to acquire control information that is sent by the network device, where the control information includes the first subframe information, a first power control manner for performing power control on the first subframe corresponding to the first subframe information, and the second The subframe information and the second power control mode for performing power control on the second subframe corresponding to the second subframe information.
- the transmitting unit 602 is configured to transmit, according to the control information acquired by the acquiring unit 601, the D2D signal according to the transmit power determined according to the first power control manner on the first subframe corresponding to the first subframe information, and the second subframe information A D2D signal is transmitted on the corresponding second subframe using the transmit power determined according to the second power control mode.
- the obtaining unit 601 is specifically configured to obtain the control information delivered by the network device as follows:
- the second sub-frame performs power control of the second power control parameter, where the value of the first power control parameter is different from the value of the second power control parameter.
- the transmitting unit 602 is specifically configured to transmit, according to the control information, the D2D signal according to the transmit power determined according to the first power control manner on the first subframe corresponding to the first subframe information, and corresponding to the second subframe information.
- the D2D signal is transmitted on the second subframe using the transmit power determined according to the second power control mode:
- the obtaining unit 601 is specific Used to obtain the control information delivered by the network device as follows:
- the second sub-frame transmits indication information of the D2D signal using the maximum transmit power supported by the user equipment of the D2D communication.
- the transmitting unit 602 is specifically configured to transmit, according to the control information, the D2D signal according to the transmit power determined according to the first power control manner on the first subframe corresponding to the first subframe information, and corresponding to the second subframe information.
- the D2D signal is transmitted on the second subframe using the transmit power determined according to the second power control mode:
- the transmitting unit 602 transmits the transmit power used by the D2D signal, which is specifically determined as follows:
- the transmit power of the transmitted D2D signal is determined according to the path loss estimation, the target receiving power of the network device that is sent by the network device, and the path loss compensation coefficient sent by the network device. Or
- the transmit power of the transmitted D2D signal is determined according to the path loss estimation, the target receiving power of the network device that is sent by the network device, the path receiving power that is sent by the network device, and the power offset that is sent by the network device.
- the user equipment provided by the embodiment of the present invention can be used to perform the control method of the transmit power of the D2D communication involved in the implementation of the second embodiment and the accompanying drawings. Therefore, the related description of the user equipment provided by the embodiment of the present invention is not detailed enough. The related description of the implementation 2 and its drawings will not be repeated here.
- the user equipment provided by the embodiment of the present invention acquires control information for performing power control on the user equipment of the D2D communication delivered by the network device, where the control information includes the first subframe information and the first subframe. a first power control mode for performing power control on the first subframe corresponding to the information, and a second power control mode for performing power control on the second subframe corresponding to the second subframe information,
- the user equipment of the D2D communication may determine the transmit power of the transmitted D2D signal by using different power control modes in the first subframe and the second subframe, respectively, to implement dynamic adjustment control on the transmit power used for transmitting the D2D signal in the D2D communication, That is, the user equipment of the D2D communication in the prior art can transmit the D2D signal with the maximum transmit power, and the user equipment of the D2D communication in the embodiment of the present invention can flexibly control the transmit power used when the D2D communication device transmits the D2D signal according to actual conditions. In addition, the interference of the D2D signal to the uplink signal received by the network device can be restricted, and the accuracy of the network device receiving the uplink signal is improved.
- the fifth embodiment of the present invention provides a communication device 700.
- the communication device includes a transmitter 701, and is processed.
- the memory 703 is configured to store program code executed by the processor 702.
- the processor 702 is configured to invoke a program stored in the memory 703, and determine control information for performing power control by the user equipment of the D2D communication, where the control information includes the first subframe information and the power performed on the first subframe corresponding to the first subframe information. Controlling a first power control mode, and second subframe control information and a second power control mode for performing power control on a second subframe corresponding to the second subframe information.
- the transmitter 701 is configured to send the control information determined by the processor 702, so that the user equipment of the D2D communication transmits the D2D signal by using the transmit power determined according to the first power control manner on the first subframe corresponding to the first subframe information. And transmitting the D2D signal using the transmit power determined according to the second power control manner on the second subframe corresponding to the second subframe information.
- the processor 702 is specifically configured to determine control information in the following manner: determining the first subframe information and performing power on the first subframe corresponding to the first subframe information. Controlling the first power control parameter, and the second subframe control information and the second power control parameter for performing power control on the second subframe corresponding to the second subframe information, where the first power The value of the control parameter is different from the value of the second power control parameter.
- the transmitter 701 is specifically configured to send the control information in the following manner, so that the user equipment of the D2D communication transmits the D2D signal by using the transmit power determined according to the first power control manner on the first subframe corresponding to the first subframe information. And transmitting, on the second subframe corresponding to the second subframe information, the D2D signal by using the transmit power determined according to the second power control manner:
- the transmit power determined by a power control parameter transmits a D2D signal, and on the second subframe corresponding to the second subframe information, the D2D signal is transmitted using the transmit power determined according to the second power control parameter.
- the processor 702 is specifically configured to determine control information in the following manner: determining the first subframe information and performing power on the first subframe corresponding to the first subframe information. Controlling the first power control parameter, and the second subframe information and the indication information indicating the maximum transmit power transmission D2D signal supported by the user equipment using the D2D communication on the second subframe corresponding to the second subframe information.
- the transmitter 701 is specifically configured to send the control information in the following manner, so that the user equipment of the D2D communication transmits the D2D signal by using the transmit power determined according to the first power control manner on the first subframe corresponding to the first subframe information. And transmitting, on the second subframe corresponding to the second subframe information, the D2D signal by using the transmit power determined according to the second power control manner:
- the parameter determined transmit power transmits the D2D signal, and on the second subframe corresponding to the second subframe information, the D2D signal is transmitted using the maximum transmit power supported by the user equipment of the D2D communication.
- the power control parameters determined by the processor 702 include:
- the path loss compensation coefficient and the target received power of the network device receiving the uplink signal can be used to implement the implementation and the related
- the communication device determines and delivers control information for power control of the user equipment of the D2D communication, where the control information includes the first subframe information and the first subframe corresponding to the first subframe information. a first power control mode for performing power control, and a second power control mode for performing power control on the second subframe corresponding to the second subframe information, where the user equipment of the D2D communication receives the network device determination And transmitting the control information, respectively, using different power control modes on the first subframe and the second subframe to determine the transmit power of the transmitted D2D signal, thereby realizing dynamic adjustment of the transmit power used for transmitting the D2D signal in the D2D communication Controlling, that is, the user equipment of the D2D communication in the prior art transmits the D2D signal with the maximum transmit power, and the user equipment of the D2D communication in the embodiment of the present invention can flexibly control the transmission when the D2D communication device transmits the D2D signal according to actual conditions. Power, which in turn can limit the interference of the
- the sixth embodiment of the present invention provides a communication device 800.
- the communication device includes a receiver 801, and the processing device includes a receiver 801, which is provided in the second embodiment of the present invention.
- the receiver 801 is configured to acquire control information that is sent by the network device, where the control information includes first subframe information, a first power control manner for performing power control on a first subframe corresponding to the first subframe information, and a second The subframe information and the second power control mode for performing power control on the second subframe corresponding to the second subframe information.
- the processor 802 is configured to invoke a program stored in the memory 803, and control, according to the control information acquired by the receiver 801, the transmitter 804 to use the first subframe corresponding to the first subframe information according to the first
- the power control mode determines the transmit power to transmit the D2D signal, and transmits the D2D signal on the second subframe corresponding to the second subframe information using the transmit power determined according to the second power control mode.
- the receiver 801 is specifically configured to obtain the control information delivered by the network device as follows:
- the second sub-frame performs power control of the second power control parameter, where the value of the first power control parameter is different from the value of the second power control parameter.
- the processor 802 is specifically configured to control, according to the control information acquired by the receiver 801, the transmitter 804 to transmit the D2D signal by using the transmit power determined according to the first power control manner on the first subframe corresponding to the first subframe information. And transmitting, by using the transmit power determined according to the second power control manner, the D2D signal on the second subframe corresponding to the second subframe information:
- the transmitter 804 controlling, by the first subframe information and the first power control parameter, the transmitter 804 to transmit the D2D signal on the first subframe corresponding to the first subframe information, using the transmit power determined according to the first power control parameter;
- the control transmitter 804 Based on the second subframe information and the second power control parameter, the control transmitter 804 transmits the D2D signal on the second subframe corresponding to the second subframe information using the transmit power determined according to the second power control parameter.
- the receiver 801 is specifically configured to obtain control information delivered by the network device as follows:
- the processor 802 is specifically configured to control, according to the control information acquired by the receiver 801, the transmitter 804 to transmit the D2D signal by using the transmit power determined according to the first power control manner on the first subframe corresponding to the first subframe information. And using the second subframe according to the second subframe information The second power control mode determines the transmit power to transmit the D2D signal:
- the transmitter 804 Controlling, by the first subframe information and the first power control parameter, the transmitter 804 to transmit the D2D signal using the transmit power determined according to the first power control parameter on the first subframe corresponding to the first subframe information;
- the control transmitter 804 Based on the second subframe information and the indication information, the control transmitter 804 transmits the D2D signal using the maximum transmit power supported by the user equipment of the D2D communication on the second subframe corresponding to the second subframe information.
- the processor 802 controls the transmit power used by the transmitter 804 to transmit the D2D signal, which is determined as follows: According to the path loss estimation, under the network device The transmitted network device receives the target received power of the uplink signal and the path loss compensation coefficient sent by the network device, and determines the transmit power of the transmitted D2D signal. Or
- the transmit power of the transmitted D2D signal is determined according to the path loss estimation, the target receiving power of the network device that is sent by the network device, the path receiving power that is sent by the network device, and the power offset that is sent by the network device.
- the communication device provided in the sixth embodiment of the present invention can be used to perform the control method for implementing the transmit power of the D2D communication involved in the second embodiment and the accompanying drawings, and the related description of the communication device shown in FIG. 8 is not enough in the sixth embodiment of the present invention.
- the related description of the communication device shown in FIG. 8 is not enough in the sixth embodiment of the present invention.
- the communication device acquires control information for performing power control on the user equipment of the D2D communication that is sent by the network device, where the control information includes the first subframe information and the first subframe corresponding to the first subframe information. a first power control mode for performing power control, and a second power control mode for performing power control on the second subframe corresponding to the second subframe information, where the user equipment of the D2D communication can be first Different power control modes are used on the subframe and the second subframe to determine the transmit power of the transmitted D2D signal, thereby realizing dynamic adjustment control of the transmit power used for transmitting the D2D signal in the D2D communication, that is, compared with the D2D communication in the prior art.
- the user equipment simply transmits the D2D signal with the maximum transmit power.
- the user equipment of the D2D communication can flexibly control the transmit power used when the D2D communication device transmits the D2D signal according to actual conditions, thereby limiting the D2D letter.
- the interference of the uplink signal received by the network device improves the accuracy of the network device receiving the uplink signal.
- 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 invention can be embodied in the form of one or more computer program products embodied on a computer-usable storage medium (including but not limited to disk storage, CD-ROM, optical storage, etc.) in which computer usable program code is embodied.
- a computer-usable storage medium 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 provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.
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Abstract
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Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
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KR1020167001419A KR101828901B1 (ko) | 2014-05-30 | 2014-05-30 | D2d 통신에서의 송신 전력 제어 방법 및 장치 |
EP14893148.8A EP3001736A4 (en) | 2014-05-30 | 2014-05-30 | TRANSMISSION CONTROL PROCESS AND DEVICE IN D2D COMMUNICATION |
JP2016558247A JP6253071B2 (ja) | 2014-05-30 | 2014-05-30 | D2d通信での送信電力制御方法およびデバイス |
CN201480001678.XA CN104488332B (zh) | 2014-05-30 | 2014-05-30 | 一种d2d通信中发射功率的控制方法及设备 |
US14/901,845 US10009859B2 (en) | 2014-05-30 | 2014-05-30 | Transmit power control method and device in D2D communication |
PCT/CN2014/078998 WO2015180170A1 (zh) | 2014-05-30 | 2014-05-30 | 一种d2d通信中发射功率的控制方法及设备 |
Applications Claiming Priority (1)
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PCT/CN2014/078998 WO2015180170A1 (zh) | 2014-05-30 | 2014-05-30 | 一种d2d通信中发射功率的控制方法及设备 |
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US (1) | US10009859B2 (zh) |
EP (1) | EP3001736A4 (zh) |
JP (1) | JP6253071B2 (zh) |
KR (1) | KR101828901B1 (zh) |
CN (1) | CN104488332B (zh) |
WO (1) | WO2015180170A1 (zh) |
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EP3178266B1 (en) * | 2014-08-08 | 2023-05-31 | Telefonaktiebolaget LM Ericsson (publ) | D2d power control |
CN106162519B (zh) * | 2015-04-24 | 2020-02-04 | 北京智谷睿拓技术服务有限公司 | 移动终端信息发送方法及发送装置 |
CN106303910B (zh) | 2015-05-29 | 2020-01-10 | 北京智谷睿拓技术服务有限公司 | 设备间通信控制方法及控制装置 |
CN106303912A (zh) | 2015-05-29 | 2017-01-04 | 北京智谷睿拓技术服务有限公司 | 设备间通信控制方法及控制装置 |
CN106303911B (zh) | 2015-05-29 | 2020-09-01 | 北京智谷睿拓技术服务有限公司 | 干扰测量方法及干扰测量装置 |
CN106303909A (zh) | 2015-05-29 | 2017-01-04 | 北京智谷睿拓技术服务有限公司 | 设备间通信控制方法、设备间通信方法、及其装置 |
CN106303908B (zh) | 2015-05-29 | 2019-11-29 | 北京智谷睿拓技术服务有限公司 | 设备间通信方法及设备间通信装置 |
CN106341772B (zh) * | 2015-07-07 | 2021-06-18 | 索尼公司 | 无线通信设备和无线通信方法 |
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CN108024372B (zh) * | 2016-11-02 | 2020-06-02 | 华为技术有限公司 | 数据处理的方法、基站与终端 |
CN108964851B (zh) | 2017-05-17 | 2023-10-24 | 华为技术有限公司 | 一种发送和接收指示信息的方法、设备和系统 |
CN110089161B (zh) * | 2017-08-11 | 2021-06-22 | 华为技术有限公司 | 一种功率控制方法及相关设备 |
CA3083010A1 (en) | 2017-11-23 | 2019-05-31 | Guangdong Oppo Mobile Telecommunications Corp., Ltd. | Signal transmission method, terminal device and network device |
CN109842926B (zh) * | 2017-11-27 | 2021-06-29 | 华为技术有限公司 | 一种功率控制的方法、装置及系统 |
EP3753214B1 (en) * | 2018-02-15 | 2023-07-19 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Communicating data of a first user equipment and data of a second user equipment on shared resources of a wireless communication system |
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CN104488332A (zh) | 2015-04-01 |
US10009859B2 (en) | 2018-06-26 |
JP6253071B2 (ja) | 2017-12-27 |
EP3001736A4 (en) | 2016-07-20 |
CN104488332B (zh) | 2019-05-28 |
US20170086150A1 (en) | 2017-03-23 |
KR101828901B1 (ko) | 2018-03-29 |
KR20160020570A (ko) | 2016-02-23 |
JP2017505590A (ja) | 2017-02-16 |
EP3001736A1 (en) | 2016-03-30 |
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