CN105323841B - A kind of D2D transmission power control method and device - Google Patents
A kind of D2D transmission power control method and device Download PDFInfo
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- CN105323841B CN105323841B CN201410378449.1A CN201410378449A CN105323841B CN 105323841 B CN105323841 B CN 105323841B CN 201410378449 A CN201410378449 A CN 201410378449A CN 105323841 B CN105323841 B CN 105323841B
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Abstract
The embodiment of the present invention provides a kind of D2D transmission power control method and device, it include: interference strength of the network equipment according to the D2D signal transmitted on the Physical Resource Block in transfer resource pond to cellular transmission signal, Physical Resource Block in the transfer resource pond is divided, obtain N number of resource area, N >=1；The network equipment is respectively that each resource area in N number of resource area is configured to the power contorl parameters that D2D is transmitted；The network equipment will be sent to terminal for the power contorl parameters of N number of resource area configuration.While the method provided through the embodiment of the present invention is reduced to cellular transmission signal interference, the signal quality and signal cover of D2D signal can be increased.
Description
Technical field
The present invention relates to wireless communication technology field more particularly to a kind of D2D transmission power control methods and device.
Background technique
In traditional cellular telecommunication art, the business such as voice-and-data of two terminals by respectively resident base station and
Core net interacts, when distance is close between terminal can by D2D (Device to Device, device-to-device,
At terminal direct connection) technology realization interaction.D2D refers to that neighbouring terminal can carry out language by direct connected link in short range
The interaction of the business such as sound and data does not need the interaction that the business such as voice-and-data are carried out by central node (i.e. base station).
In LTE (Long Term Evolution, long term evolution) network, D2D communication refers to that work authorizes frequency in LTE
Duan Shang, the D2D communication controlled by LTE network, does so the advantage that on the one hand can give full play to D2D communication, another aspect LTE
Network can also overcome the problems, such as some of traditional D2D communication to the control that D2D is communicated, such as interfere uncontrollable etc..
When D2D communication is introduced into the authorized spectrum band of LTE, D2D communication will share radio resource with cellular communication, at this time
D2D communication and cellular communication are multiplexed the interference that identical resource inevitably results in mutual signal.As shown in Figure 1, D2D is communicated
When will share cellular ascending resource with cellular communication, interference of the D2D signal to cellular transmission signal will affect cellular communication
Quality, the intensity of interference depend on the power that D2D is transmitted and D2D transmitting terminal to the distance of base station.
Interference of the D2D signal to cellular transmission signal is controlled, general use reduces transimission power when D2D signal is sent
Method.The factors such as the transimission power of D2D signal and path loss compensation factor, transmission objectives reception power are related.Base station at present
Power can be received for D2D terminal distribution one lower path loss compensation factor and/or transmission objectives, so that D2D null terminator Null
The transimission power of frame is maintained in a lower range, and this method can reduce interference.But the lower transmission function of D2D signal
Rate will cause D2D signal transmission quality and transmission coverage area decline.
In conclusion will lead to the signal transmission of D2D communication when controlling interference of the D2D signal to cellular transmission signal
Quality and transmission coverage area decline.
Summary of the invention
The embodiment of the present invention provides a kind of D2D transmission power control method and device, is controlling in the prior art to solve
When D2D signal processed is to the interference of cellular transmission signal, signal transmission quality and the transmission coverage area decline of D2D communication will lead to
The problem of.
The embodiment of the present invention provides a kind of device-to-device D2D transmission power control method, comprising:
The network equipment does cellular transmission signal according to the D2D signal transmitted on the Physical Resource Block in transfer resource pond
Intensity is disturbed, the Physical Resource Block in the transfer resource pond is divided, obtains N number of resource area, N >=1, the transmission money
Source pond is the resource collection for D2D transmission；
The network equipment is respectively that each resource area in N number of resource area is configured to the function that D2D is transmitted
Rate control parameter；
The network equipment will be sent to terminal for the power contorl parameters of N number of resource area configuration.
Preferably, it is described obtain N number of resource area after, further includes:
The network equipment is N number of resource area configuration preference level, and excellent by configuring for N number of resource area
First grade is sent to the terminal；Wherein, the priority of big to cellular transmission signal interference intensity resource area configuration lower than pair
The priority of the low resource area configuration of cellular transmission signal interference intensity.
Preferably, the transfer resource pond is all physics money that the network equipment distributes to cell for D2D transmission
The set of source block；
The network equipment will be sent to terminal for the power contorl parameters of N number of resource area configuration, comprising:
The network equipment is by system broadcasts signaling or dedicated signaling, the function that will be configured for N number of resource area
Rate control parameter is sent to the terminal in the cell.
Preferably, further include:
Physical Resource Block in the transfer resource pond is distributed to the terminal in the cell and carried out by the network equipment
After D2D transmission, corresponding power contorl parameters are determined according to resource area belonging to the Physical Resource Block distributed；
The network equipment according in the cell terminal and the distance between the network equipment and/or path damage
Consumption, is adjusted the power contorl parameters determined；
Power contorl parameters adjusted are sent to the terminal in the cell by the network equipment.
Preferably, the transfer resource pond is all physics money that the network equipment distributes to terminal for D2D transmission
The set of source block；
The network equipment will be sent to terminal for the power contorl parameters of N number of resource area configuration, comprising:
The network equipment is by broadcast signaling or dedicated signaling, the power control that will be configured for N number of resource area
Parameter processed is sent to the terminal.
Preferably, the power contorl parameters include: path loss compensation factor, transmission objectives reception power, closed loop function
One of rate adjusted value or any combination.
Preferably, the network equipment will be N number of money when the power contorl parameters include closed power adjusted value
The power contorl parameters of source region configuration of territory are sent to terminal, comprising:
The network equipment sends closed loop transmission power to the terminal and controls TPC command, includes every in the TPC command
The corresponding power contorl parameters of a resource area, and indicate resource corresponding to power contorl parameters one of in the following manner
Region:
Radio network temporary identifier RNTI corresponding with resource area is carried in the TPC command；
The instruction information of resource area is carried in the DCI format in the TPC command；
By the closed power adjusted value carried in the TPC command resource area corresponding with the closed power adjusted value
Mark carry out combined coding, and transmitted by the TPC command.
The embodiment of the present invention provides a kind of device-to-device D2D transmission power control method, this method comprises:
Terminal receives the power contorl parameters of N number of resource area, wherein N number of resource area be the network equipment according to
The D2D signal transmitted on Physical Resource Block in transfer resource pond provides the interference strength of cellular transmission signal to the transmission
What the Physical Resource Block in the pond of source was divided, N >=1, the transfer resource pond is the resource collection for D2D transmission；
The terminal, according to the power contorl parameters of N number of resource area, is determined in the N when carrying out D2D communication
Transimission power when D2D signal is transmitted in a resource area, the transimission power that the terminal is determined in N number of resource area
Summation is not more than the maximum transmission power of the terminal.
Preferably, each resource area in N number of resource area is provided with corresponding priority, wherein to honeycomb
The priority for transmitting the big resource area configuration of signal interference intensity is lower than the resource-area low to cellular transmission signal interference intensity
The priority of configuration of territory；
Transimission power when D2D signal is transmitted in the determination in N number of resource area, comprising:
The terminal distributes according to the priority of N number of resource area and transmits D2D signal in N number of resource area
When transimission power.
Preferably, the power contorl parameters according to N number of resource area, determine in N number of resource area
Transmit transimission power when D2D signal, comprising:
The terminal estimate the network equipment between the terminal path loss or the terminal to described
Path loss between the reception terminal of D2D signal, according to the path loss and the power control of N number of resource area
Parameter determines transimission power when transmitting D2D signal in N number of resource area.
Preferably, the power contorl parameters include: path loss compensation factor, transmission objectives reception power, closed loop function
One of rate adjusted value or any combination.
The embodiment of the present invention provides a kind of network equipment, comprising:
Division unit, for being believed according to the D2D signal transmitted on the Physical Resource Block in transfer resource pond cellular transmission
Number interference strength, the Physical Resource Block in the transfer resource pond is divided, N number of resource area, N >=1 are obtained；
Parameter configuration unit, for being respectively that each resource area in N number of resource area is configured to D2D transmission
Power contorl parameters；
Transmission unit, for will be that the power contorl parameters that N number of resource area configures are sent to terminal.
Preferably, after the parameter configuration unit obtains N number of resource area, further includes:
For N number of resource area configuration preference level, and institute will be sent to for the priority of N number of resource area configuration
State terminal；Wherein, the priority of the resource area big to cellular transmission signal interference intensity configuration is lower than to cellular transmission signal
The priority of the low resource area configuration of interference strength.
Preferably, the transfer resource pond is that the network equipment distributes to property of the serving cell for D2D transmission
Manage the set of resource block；
The transmission unit is used for:
By system broadcasts signaling or dedicated signaling, will be sent out for the power contorl parameters of N number of resource area configuration
Give the terminal in the cell.
Preferably, further include:
Physical Resource Block in the transfer resource pond is distributed to the terminal in the cell and carried out by the division unit
After D2D transmission, corresponding power contorl parameters are determined according to resource area belonging to the Physical Resource Block distributed；
The network equipment according in the cell terminal and the distance between the network equipment and/or path damage
Consumption, is adjusted the power contorl parameters determined；
Power contorl parameters adjusted are sent to the terminal in the cell by the network equipment.
Preferably, the transfer resource pond is all physics money that the division unit distributes to terminal for D2D transmission
The set of source block；
The transmission unit is used for:
By system broadcasts signaling or dedicated signaling, will be sent out for the power contorl parameters of N number of resource area configuration
Give the terminal.
Preferably, the power contorl parameters include: path loss compensation factor, transmission objectives reception power, closed loop function
One of rate adjusted value or any combination.
Preferably, the transmission unit is used for when the power contorl parameters include closed power adjusted value:
Closed loop transmission power is sent to the terminal and controls TPC command, includes each resource area pair in the TPC command
The power contorl parameters answered, and indicate resource area corresponding to power contorl parameters one of in the following manner:
Radio network temporary identifier RNTI corresponding with resource area is carried in the TPC command；
The instruction information of resource area is carried in the DCI format in the TPC command；
By the closed power adjusted value carried in the TPC command resource area corresponding with the closed power adjusted value
Mark carry out combined coding, and transmitted by the TPC command.
The embodiment of the present invention provides a kind of terminal, comprising:
Receiving unit, for receiving the power contorl parameters of N number of resource area, wherein N number of resource area is network
Equipment according to the D2D signal transmitted on the Physical Resource Block in transfer resource pond to the interference strength of cellular transmission signal, to institute
State what the Physical Resource Block in transfer resource pond was divided, N >=1；
Determination unit, for according to the power contorl parameters of N number of resource area, determining when carrying out D2D communication
In N number of resource area transmit D2D signal when transimission power, the transimission power determined in N number of resource area it is total
With the maximum transmission power for being not more than terminal.
Preferably, each resource area in N number of resource area is provided with corresponding priority, wherein to honeycomb
The priority for transmitting the big resource area configuration of signal interference intensity is lower than the resource-area low to cellular transmission signal interference intensity
The priority of configuration of territory；
Transimission power when D2D signal is transmitted in the determination in the resource area, comprising:
The terminal distributes according to the priority of N number of resource area and transmits D2D signal in N number of resource area
When transimission power.
Preferably, the determination unit is used for:
Estimate the network equipment between the terminal path loss or the terminal to the D2D signal
The path loss between terminal is received, is determined according to the power contorl parameters of the path loss and N number of resource area
Transimission power when D2D signal is transmitted in N number of resource area.
Preferably, the power contorl parameters include: path loss compensation factor, transmission objectives reception power, closed loop function
One of rate adjusted value or any combination.
In the embodiment of the present invention, the network equipment is according to the D2D signal pair transmitted on the Physical Resource Block in transfer resource pond
The Physical Resource Block is divided at least one resource area, then to division by the different interference strength of cellular transmission signal
Each resource area is respectively configured transmission objectives and receives power and/or path loss compensation factor.Due in each resource area
It configures different transmission objectives and receives power and/or path loss compensation factor, so in the resource area of different interference intensity
In, transmission power when terminal transmission D2D signal is also different, smaller to the high region configuration of cellular transmission signal interference intensity
Transmission objectives receive power and/or path loss compensation factor, it is possible to reduce interference, to cellular transmission signal interference intensity
Low region configures biggish transmission objectives and receives power and/or path loss compensation factor, can increase the signal of D2D signal
Quality and signal cover, while will not also have large effect to cellular transmission signal.
Detailed description of the invention
Fig. 1 is the schematic diagram that radio resource is shared in D2D communication and cellular communication；
Fig. 2 is a kind of D2D transmission power control method flow chart provided in an embodiment of the present invention；
Fig. 3 is a kind of D2D transmission power control method flow chart provided in an embodiment of the present invention；
Fig. 4 provides a kind of network equipment for the embodiment of the present invention；
Fig. 5 provides a kind of terminal for the embodiment of the present invention.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with attached drawing to the present invention make into
It is described in detail to one step, it is clear that the described embodiments are only some of the embodiments of the present invention, rather than whole implementation
Example.Based on the embodiments of the present invention, obtained by those of ordinary skill in the art without making creative efforts
All other embodiment, shall fall within the protection scope of the present invention.
The literal translation of D2D technology is exactly device-to-device technology, alternatively referred to as terminal direct connection technology.D2D is carried out in the lte networks
When communication, D2D communication shares radio resource with cellular network communication, and the sharing mode of radio resource can be divided into two kinds: orthogonal
The shared and multiplex mode of mode is shared.Use orthogonal manner carry out radio resource it is shared refer on radio resource uses with
Mode either statically or dynamically carries out quadrature divide to radio resource, communicates cellular network communication and D2D using mutually orthogonal
Radio resource；When carrying out that radio resource is shared to refer to D2D communication using multiplex mode, to being used in a manner of as defined in standard
Cell resource carry out shared multiplexing, and within the limits prescribed by the interference limitation between two kinds of communications.
D2D communication and cellular network communication are multiplexed identical radio resource and inevitably result in mutual interference, due to
It is preferentially ensured of the quality of cellular network communication, when reducing interference, reduction D2D signal is first had to and cellular transmission signal is done
It disturbs.
Terminal needs to get the physical resource that can transmit D2D signal in transfer resource pond when carrying out D2D communication
Block.The set that transfer resource pond is made of Physical Resource Block.Transfer resource pond includes sending resource pool and receiving resource pool, is sent out
It send in resource pool comprising the Physical Resource Block for sending D2D signal, receives in resource pool comprising the object for receiving D2D signal
Manage resource block.Physical Resource Block in transfer resource pond is generally obtained by following manner:
One, the transfer resource pond of cell-level.The network equipment is that the cell of the network equipment distributes a part of Physical Resource Block
As transfer resource pond, the terminal in the cell uses the Physical Resource Block in the transfer resource pond by the way of shared；
Two, the transfer resource pond of user class.The network equipment is that a terminal individually distributes a part of Physical Resource Block conduct
Transfer resource pond, the transfer resource pond are that the terminal exclusively enjoys.
In the embodiment of the present invention, the network equipment is according to the D2D signal pair transmitted on the Physical Resource Block in transfer resource pond
The Physical Resource Block is divided at least one resource area, then to division by the different interference strength of cellular transmission signal
Each resource area is respectively configured transmission objectives and receives power and/or path loss compensation factor.Due in each resource area
It configures different transmission objectives and receives power and/or path loss compensation factor, so to cellular transmission signal disturbance
In the resource area of intensity, transimission power when terminal transmission D2D signal is also different.
The embodiment of the present invention is described in detail with reference to the accompanying drawings of the specification.
As shown in Fig. 2, a kind of D2D transmission power control method flow chart provided in an embodiment of the present invention, this method comprises:
Step 201: the network equipment is according to the D2D signal transmitted on the Physical Resource Block in transfer resource pond to cellular transmission
The interference strength of signal divides the Physical Resource Block in the transfer resource pond, obtains N number of resource area, N >=1；
Step 202: the network equipment is respectively that each resource area in N number of resource area is configured to D2D
The power contorl parameters of transmission, the power contorl parameters include that path loss compensation factor and/or transmission objectives receive power；
Step 203: the power contorl parameters configured for N number of resource area are sent to terminal by the network equipment.
The network equipment generally refers to base station in the embodiment of the present invention, or possesses the functional other equipment of base station institute.
What above-mentioned process can usually carry out at any time, the scheduling of resource of cellular transmission be it is dynamic, D2D transfer resource pond
Configuration may be semi-static, therefore generally divide resource area according to the adjustment in transfer resource pond.
In step 201, the network equipment first can divide transfer resource pond, and transfer resource pond is logical for D2D
The resource collection of letter, the foundation of division are D2D signals in transmission to the interference strength of cellular transmission signal.D2D signal is passing
When being transmitted in different Physical Resource Block in defeated resource pool, the interference strength of cellular transmission signal is different, it is therefore desirable to
Physical Resource Block similar in interference strength is divided into a resource area, such transfer resource pond will be divided into N number of resource
Region, wherein N is more than or equal to 1.
In step 202, transfer resource pond divides finish after, can be to each resource area configuration identifier, while to every
A resource area configures different power contorl parameters, which includes path loss compensation factor and/or transmission
Target received power.When the resource area more than one of division, the configuration of power contorl parameters be it is distinguishing, in resource area
Bigger to cellular transmission signal interference intensity when middle transmission D2D signal, the numerical value of the power contorl parameters of the resource area is got over
It is small.
The network equipment divides transfer resource pond using following two method:
One, to cellular transmission signal interference intensity when the network equipment is first estimated to transmit D2D signal in resource area, will estimate
The result counted out is as the foundation for dividing resource area.
After having transmitted D2D signal in resource area, network equipment meeting basis transmits D2D in the resource area
To cellular transmission signal interference intensity when signal, transfer resource pond is repartitioned.
Two, to cellular transmission signal interference intensity when D2D signal is transmitted in network equipment estimation in resource area, will only estimate
The result counted out is as the foundation for dividing resource area.
To include first resource region and Secondary resource region in N number of resource area, and transmitted on first resource region
D2D signal to the interference strength of cellular transmission signal, greater than the D2D signal transmitted on Secondary resource region to cellular transmission
For the interference strength of signal, then the network equipment is the first power control ginseng that first resource region is configured to D2D transmission
Several numerical value, less than the numerical value for the second power contorl parameters for being configured to D2D transmission for Secondary resource region, that is, the first function
Path loss compensation factor in rate control parameter is less than the path loss compensation factor in the second power contorl parameters, the first function
Transmission objectives in rate control parameter receives power and receives power less than the transmission objectives in the second power contorl parameters.
The power control of the resource area high to the interference strength of cellular transmission signal when by by terminal transmission D2D signal
Parameter values configure smaller, so that the transimission power of the D2D signal sent in the resource area becomes smaller, to reduce network
The interference strength of the cellular transmission signal of equipment, at the same by when terminal transmission D2D signal to the interference strength of cellular transmission signal
The power contorl parameters numerical value of low resource area configures bigger, so that the biography of the D2D signal sent in the resource area
Defeated power becomes larger, to improve the signal quality of the D2D signal sent in the resource area and the coverage area of signal.
In step 202, the network equipment, can be according to physical resource when transfer resource pond is divided into N number of resource area
The frequency domain information of block is divided, and is also possible to be divided according to the time-domain information of Physical Resource Block, can also be according to physics
The time-frequency domain information of resource block is divided.
It, then can be with if the range of frequency domain is { N1, N2 } for example, when the frequency domain information according to Physical Resource Block is divided
Divide three resource area F1={ N1, N1+X }, F2={ N1+X+1, N1+Y-1 }, F3={ N1+Y, N2 }, each resource area
There is different frequency ranges.
In step 202, it may include that path loss is mended that the network equipment, which is the power contorl parameters of each resource area configuration,
It repays the factor and/or transmission objectives receives power.Wherein, the path loss compensation factor includes the path damage of each resource area
Compensation factor is consumed, or using the path loss compensation factor configured for a resource area as reference path fissipation factor, is
The offset of other N-1 resource area configuration path loss balancing factor, in this way, can be damaged by the corresponding path of resource area
The path-loss factor of the resource area is calculated in the offset and the reference path loss balancing factor that consume compensation factor.Together
Reason, the transmission objectives receive the transmission objectives that power includes each resource area and receive power, or will be a resource-area
The transmission objectives of configuration of territory receives power as reference transmission target received power, is other N-1 resource area configuration transmission
The offset of target received power.
In step 203, after the network equipment divides the transfer resource pond of cell-level, can by system broadcast message,
All terminals power contorl parameters configured for each resource area being sent in the cell.The network equipment is by user class
After transfer resource pond divides, the power contorl parameters configured for each resource area can be sent to this by dedicated signaling
Terminal belonging to transfer resource pond.
As previously mentioned, transfer resource pond may include the transfer resource pond of cell-level and the transfer resource pond of user class.
If in step 201, the network equipment carries out resource area division to the transfer resource pond of cell-level, then in step
In 202, the network equipment is the power contorl parameters that resource area configures cell-level, and the power contorl parameters configured at this time are suitable for
All terminals in the cell have certain versatility.
In view of that may be had differences, lead to the power contorl parameters of configuration and paid no attention to due to the wireless environment of each terminal
Think, following optimization processing carried out to this embodiment of the present invention:
Wireless environment locating for network equipment power contorl parameters according to corresponding to the Physical Resource Block and terminal,
The power contorl parameters of cell-level are adjusted.Specifically, being obtained by way of competition or network equipment distribution in terminal
After Physical Resource Block needed for D2D signal must be transmitted, determined pair according to resource area belonging to the Physical Resource Block distributed
The power contorl parameters answered, then the network equipment is according to the distance between terminal and the network equipment and/or path loss, to determination
Power contorl parameters out are adjusted, and power contorl parameters adjusted are sent to the terminal.Exist at this time to the terminal
Power control when transmitting D2D signal can power contorl parameters than using cell-level when power control it is more accurate.
If in step 201, the network equipment carries out resource area division to the transfer resource pond of user class, then in step
In 202, the network equipment is the power contorl parameters that resource area configures user class, and the power contorl parameters configured at this time are bases
Radio environment configuration locating for the terminal, therefore can be more accurate to power control of the terminal when transmitting D2D signal.
Preferably, after dividing resource area, the network equipment can also be N number of resource area configuration preference level, and will be N
The priority of a resource area configuration is sent to the terminal.It wherein, is the priority of the big resource area configuration of interference strength
The priority of the resource area configuration low less than interference strength.Purpose for resource area configuration preference level is preferential in order to allow
The high resource area of grade can preferentially be assigned to transimission power.
Terminal according in the resource area and each resource area of network equipments configuration transmission objectives receive power and/or
Path loss compensation factor calculates transimission power, since transimission power summation of the terminal in each resource area no more than should
The maximum transmission power that terminal can be sent, the D2D signal in this resource area resulted in may not be able to be obtained in transmission
The transimission power that must be needed, therefore the network equipment can be resource area configuration preference level, priority is higher, then the resource area
In D2D signal preferentially obtain the transimission powers of needs in transmission.
Terminal first determines that the D2D signal transmits the priority of used resource area, first counts when transmitting D2D signal
The transimission power of the D2D signal of the high resource area of priority is calculated, then the distribution transmission function in distributable transimission power
Rate gives the D2D signal.The higher resource area of priority at this time, the D2D signal transmitted in the resource area are more possible to obtain
Obtain required transimission power.Such as having 3 resource areas A, B, C, transimission power of the D2D signal in 3 resource areas is total
With no more than 10dBm, the sequence of their priority from high to low is A, B, C, is computed transimission power in A and needs 5dBm,
It is computed transimission power in B and needs 4dBm, transimission power is computed in C and needs 4dBm, the D2D signal in A and B exists at this time
Required transimission power can be obtained when transmission, since the priority of C is minimum, last remaining 1dBm distributes to C, but cannot expire
Demand of D2D signal of the foot in C when sending.
Above-mentioned process is described in detail with a specific example below.
In step 201, it is PRB { N1, N2 } that the network equipment, which is the transfer resource pond of the user class of terminal distribution, according to
D2D signal, can be according to PRB (physical resource block, object to the difference of the interference strength of cellular transmission signal
Reason resource block) frequency domain PRB { N1, N2 } is divided into three resource areas: F1=PRB { N1, N1+X }, F2=PRB { N1+X+
1, N1+Y-1 }, F3=PRB { N1+Y, N2 }.Wherein, in F3 D2D signal to the interference strength of cellular transmission signal in these three moneys
It is most strong in source region, weak than F2 stronger, in F2 D2D signal of the D2D signal to the interference strength ratio F3 of cellular transmission signal in F1
It is most weak in these three resource areas to the interference strength of cellular transmission signal.
The network equipment is each resource area configuration preference level.According to D2D signal to the interference strength of cellular transmission signal
Stronger, the lower principle configuration of priority, the sequence of the priority of three resource areas from high in the end is F2, F1, F3.
In step 202, the network equipment passes honeycomb when transmitting D2D signal according to terminal in each frequency domain resource region
The disturbed condition of defeated signal configures at least one in transmission objectives reception power and path loss compensation factor.
For example, configuring transmission objectives for resource area receives power set { PO_D2D_F1,PO_D2D_F2,PO_D2D_F3And path
Loss balancing factor set { αD2D_F1,αD2D_F2,αD2D_F3}。PO_D2D_F1,PO_D2D_F2,PO_D2D_F3The respectively target of F1, F2, F3
Receive power, αD2D_F1,αD2D_F2,αD2D_F3The respectively path loss compensation factor of F1, F2, F3.
For another example configuring transmission objectives for resource area receives power set { PO_D2D_F1,PO_D2D_F2,PO_D2D_F3}。
PO_D2D_F1,PO_D2D_F2,PO_D2D_F3The respectively target received power of F1, F2, F3.The network equipment is that F1, F2, F3 configuration are identical
Path loss compensation factor.
For another example being resource area configuration path loss balancing factor set { αD2D_F1,αD2D_F2,αD2D_F3}。αD2D_F1,
αD2D_F2,αD2D_F3The respectively path loss compensation factor of F1, F2, F3.The network equipment is that F1, F2, F3 configure identical transmission
Target received power.
The network equipment can also configure a transmission objectives and receive power PO_D2DAs a reference value, a transmission is then configured
Target received power deviates value set { PO_D2D_off1,PO_D2D_off2,PO_D2D_off3}.The transmission objectives of F1, F2, F3 receive power
Power excursion value set can be received according to a reference value and transmission objectives to be calculated.
The network equipment can also configure a path loss compensation factor αD2DAs a reference value, it is reconfigured a path damage
It consumes compensation factor and moves value set { Δ αD2D_F1,ΔαD2D_F2,ΔαD2D_F3}.The path loss compensation factor of F1, F2, F3 can bases
The a reference value and path loss compensation factor offset value set are calculated.
Terminal is when carrying out D2D communication, according to the transmission in the resource area of network equipments configuration and each resource area
Target received power and/or path loss compensation factor calculate the transimission power of D2D signal each subframe in transmission.Terminal exists
Transimission power summation in each resource area is no more than the maximum transmission power that terminal can be sent.
In order to enable the D2D signal of the higher resource area of priority preferentially to obtain required transmission function in transmission
Rate, terminal calculate the transimission power in each resource area according to the priority that the network equipment is resource area configuration.Tool
Body, the sequencing of calculating is F2, F1, F3.Following calculation formula is to calculate the subframe i of D2D signal respectively in each money
The transimission power of source region, wherein i is positive integer.
Refer to the maximum transmission power on the subframe i of the D2D signal of terminal；Refer to terminal in subframe i
The transimission power of signal when above being communicated between the network equipment；MFxIt (i) is subframe i occupied by the resource area Fx transmitting data
Physical Resource Block size, indicated with Physical Resource Block (PRB) number, PO_D2D_FxIndicate transmission objectives power, αD2D_FxIt indicates
Path loss compensation factor, wherein x takes 1,2 or 3；PL is the downlink path loss of terminal measurement, unit dB；F (i) is network
The closed power adjusted value for the power control command control that equipment is sent, ΔTF(i) by modulation coding scheme and data type (control
System or data information) determined by power offset.
In the above calculation formula, at least one is network in transmission objectives reception power and path loss compensation factor
Equipment configures the disturbed condition of cellular transmission signal when transmitting D2D signal according to terminal.It can also be by ΔTF(i)
With f (i) zero setting.
When f (i) not zero setting, closed loop transmission power control (Transmission Power is can be used in the network equipment
Control, TPC) order setting f (i), so that the power control to a certain resource area is further adjusted, so that eventually
The case where end can be dispatched according to network equipment resource, channel when degree and D2D to cellular transmission signal interference communicate
Quality and coverage area carry out power adjustment, while can also compensate since uplink and downlink channel mismatches caused Power control error.
An identical value can be set by the f (i) of all resource areas by TPC command, it can also be according to each resource area
The case where respectively each resource area one f (i) is set.
The network equipment distributes to terminal, and to carry out resource area shared by D2D transfer resource used when D2D communication more than one,
Or closed loop is dispatched when not sending simultaneously with the signaling of scheduling D2D transfer resource, the network equipment needs sending the same of TPC command
When indicate resource area corresponding to f (i) in the TPC command.
Indicate that the mode in the corresponding frequency domain resource region f (i) in TPC command specifically includes one of following manner:
Radio network temporary identifier RNTI corresponding with resource area is carried in TPC command；
It include instruction information corresponding with resource area in DCI format；
By the closed power adjusted value carried in the TPC command resource area corresponding with the closed power adjusted value
Mark carry out combined coding, and transmitted by the TPC command.
Above method is suitable for the various transport-types of D2D.
Above method is also applied for the Physical Resource Block in transfer resource pond according to time domain or the time-frequency domain side of combining
Formula marks off the resource area come.
As shown in figure 3, a kind of D2D transmission power control method flow chart provided in an embodiment of the present invention, this method comprises:
Step 301: terminal receives the power contorl parameters of N number of resource area, wherein N number of resource area is network
Equipment according to the D2D signal transmitted on the Physical Resource Block in transfer resource pond to the interference strength of cellular transmission signal, to institute
State what the Physical Resource Block in transfer resource pond was divided, the power contorl parameters include path loss compensation factor
And/or transmission objectives receives power, N >=1；
Step 302: the terminal is when carrying out D2D communication, according to the power contorl parameters of N number of resource area, really
It is scheduled on transimission power when transmitting D2D signal in N number of resource area.
Information of the terminal after the transfer resource pond for receiving network equipment transmission divides, divides including transfer resource pond
N number of resource area and the corresponding power contorl parameters of each resource area, power contorl parameters include path loss compensation because
Son and/or transmission objectives receive power.Terminal calculates the transmission function of subframe in D2D signal according to these parameters that network side is sent
Rate.
Preferably, terminal is when carrying out D2D communication, if the transfer resource pond of terminal is divided at least one resource-area
Domain, in determining D2D signal during the transimission power of subframe, the priority that resource area can also be configured according to the network equipment
Calculate transimission power.Terminal first calculates transimission power of the subframe in the high resource area of priority of D2D signal, then for
Transimission power is distributed in the transimission power of distribution to the subframe of the D2D signal.The higher resource area of priority at this time, in the money
The D2D signal transmitted in source region is more possible to obtain required transimission power.
Preferably, terminal by the network equipment of estimation between the terminal path loss or terminal to D2D signal
Reception terminal between path loss as calculate transimission power one of parameter.
For above method process, the embodiment of the present invention also provides a kind of network equipment and terminal.Wherein, the network equipment
Process shown in Fig. 2 can be achieved, which can realize process shown in Fig. 3.
As shown in figure 4, the embodiment of the present invention provides a kind of network equipment, comprising:
Division unit 401, for according to the D2D signal transmitted on the Physical Resource Block in transfer resource pond to cellular transmission
The interference strength of signal divides the Physical Resource Block in the transfer resource pond, obtains N number of resource area, N >=1；
Parameter configuration unit 402, for being respectively that each resource area in N number of resource area is configured to D2D
The power contorl parameters of transmission；
Transmission unit 403, for will be that the power contorl parameters that N number of resource area configures are sent to terminal.
Preferably, the parameter configuration unit 402 is used for:
By in the power contorl parameters of the resource area high to cellular transmission signal interference intensity path loss compensation because
Path loss compensation in the power contorl parameters less than the resource area low to cellular transmission signal interference intensity of son configuration
The factor, and/or the transmission objectives in the power contorl parameters of the resource area high to cellular transmission signal interference intensity is received
Transmission objectives in the power contorl parameters less than the resource area low to cellular transmission signal interference intensity of power configuration connects
Receive power.
Preferably, after the parameter configuration unit 402 obtains N number of resource area, further includes:
For N number of resource area configuration preference level, and institute will be sent to for the priority of N number of resource area configuration
State terminal；Wherein, the priority of the resource area big to cellular transmission signal interference intensity configuration is lower than to cellular transmission signal
The priority of the low resource area configuration of interference strength.
Preferably, the transfer resource pond is that the network equipment distributes to property of the serving cell for D2D transmission
Manage the set of resource block；
The transmission unit 403 is used for:
By system broadcasts signaling or dedicated signaling, will be sent out for the power contorl parameters of N number of resource area configuration
Give the terminal in the cell.
Preferably, further include:
The division unit 401 by the Physical Resource Block in the transfer resource pond distribute to the terminal in the cell into
After row D2D transmission, corresponding power contorl parameters are determined according to resource area belonging to the Physical Resource Block distributed；
The network equipment according in the cell terminal and the distance between the network equipment and/or path damage
Consumption, is adjusted the power contorl parameters determined；
Power contorl parameters adjusted are sent to the terminal in the cell by the network equipment.
Preferably, the transfer resource pond is that the division unit 401 distributes to all physics of the terminal for D2D transmission
The set of resource block；
The transmission unit 403 is used for:
The terminal will be sent to for the power contorl parameters of N number of resource area configuration.
Preferably, the transmission unit 403 will be N number of resource area configuration by dedicated signaling or broadcast signaling
Power contorl parameters be sent to the terminal.
Preferably, the power contorl parameters include: path loss compensation factor, transmission objectives reception power, closed loop function
One of rate adjusted value or any combination.
Preferably, the transmission unit 403 is used for when the power contorl parameters include closed power adjusted value:
Closed loop transmission power is sent to the terminal and controls TPC command, includes each resource area pair in the TPC command
The power contorl parameters answered, and indicate resource area corresponding to power contorl parameters one of in the following manner:
Radio network temporary identifier RNTI corresponding with resource area is carried in the TPC command；
The instruction information of resource area is carried in the DCI format in the TPC command；
By the closed power adjusted value carried in the TPC command resource area corresponding with the closed power adjusted value
Mark carry out combined coding, and transmitted by the TPC command.
As shown in figure 5, the embodiment of the present invention provides a kind of terminal, comprising:
Receiving unit 501, for receiving the power contorl parameters of N number of resource area, wherein N number of resource area is
The network equipment according to the D2D signal transmitted on the Physical Resource Block in transfer resource pond to the interference strength of cellular transmission signal,
Physical Resource Block in the transfer resource pond is divided, N >=1；
Determination unit 502 is used for when carrying out D2D communication, according to the power contorl parameters of N number of resource area, really
It is scheduled on transimission power when transmitting D2D signal in N number of resource area, the transimission power determined in N number of resource area
Summation be not more than terminal maximum transmission power.
Preferably, the power control of resource area high to cellular transmission signal interference intensity in N number of resource area
The power control less than the resource area low to cellular transmission signal interference intensity of path loss compensation factor configuration in parameter
Path loss compensation factor in parameter processed, and/or by the power control of the resource area high to cellular transmission signal interference intensity
Transmission objectives in parameter processed receives the power less than the resource area low to cellular transmission signal interference intensity of power configuration
Transmission objectives in control parameter receives power.
Preferably, each resource area in N number of resource area is provided with corresponding priority, wherein to honeycomb
The priority for transmitting the big resource area configuration of signal interference intensity is lower than the resource-area low to cellular transmission signal interference intensity
The priority of configuration of territory；
Transimission power when D2D signal is transmitted in the determination in N number of resource area, comprising:
The terminal distributes according to the priority of N number of resource area and transmits D2D signal in N number of resource area
When transimission power.
Preferably, the determination unit 502 is used for:
Estimate the network equipment between the terminal path loss or the terminal to the D2D signal
The path loss between terminal is received, is determined according to the power contorl parameters of the path loss and N number of resource area
Transimission power when D2D signal is transmitted in N number of resource area.
Preferably, the power contorl parameters include: path loss compensation factor, transmission objectives reception power, closed loop function
One of rate adjusted value or any combination.
The method provided according to embodiments of the present invention, the network equipment are transmitted according on the Physical Resource Block in transfer resource pond
The D2D signal interference strength different to cellular transmission signal, which is divided at least one resource area, so
Transmission objectives is respectively configured to each resource area of division afterwards and receives power and/or path loss compensation factor.Due to every
A resource area configures different transmission objectives and receives power and/or path loss compensation factor, so in different interference intensity
Resource area in, transmission power when terminal transmission D2D signal is also different, in the area high to cellular transmission signal interference intensity
The lesser transmission objectives of configuration of territory receives power and/or path loss compensation factor, it is possible to reduce interference is believed to cellular transmission
The low region of number interference strength configures biggish transmission objectives and receives power and/or path loss compensation factor, can increase D2D
The signal quality and signal cover of signal, while will not also have large effect to cellular transmission signal.
The present invention be referring to according to the method for the embodiment of the present invention, the process of equipment (system) and computer program product
Figure and/or block diagram describe.It should be understood that every one stream in flowchart and/or the block diagram can be realized by computer program instructions
The combination of process and/or box in journey and/or box and flowchart and/or the block diagram.It can provide these computer programs
Instruct the processor of general purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices to produce
A raw machine, so that being generated by the instruction that computer or the processor of other programmable data processing devices execute for real
The device for the function of being specified in present one or more flows of the flowchart and/or one or more blocks of the block diagram.
These computer program instructions, which may also be stored in, is able to guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works, so that it includes referring to that instruction stored in the computer readable memory, which generates,
Enable the manufacture of device, the command device realize in one box of one or more flows of the flowchart and/or block diagram or
The function of being specified in multiple boxes.
These computer program instructions also can be loaded onto a computer or other programmable data processing device, so that counting
Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, thus in computer or
The instruction executed on other programmable devices is provided for realizing in one or more flows of the flowchart and/or block diagram one
The step of function of being specified in a box or multiple boxes.
Although preferred embodiments of the present invention have been described, it is created once a person skilled in the art knows basic
Property concept, then additional changes and modifications may be made to these embodiments.So it includes excellent that the following claims are intended to be interpreted as
It selects embodiment and falls into all change and modification of the scope of the invention.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
Mind and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to include these modifications and variations.
Claims (22)
1. a kind of device-to-device D2D transmission power control method characterized by comprising
The network equipment is strong to the interference of cellular transmission signal according to the D2D signal transmitted on the Physical Resource Block in transfer resource pond
Degree, divides the Physical Resource Block in the transfer resource pond, obtains N number of resource area, N >=1, the transfer resource pond
It is the resource collection for D2D transmission；
The network equipment is respectively that each resource area in N number of resource area is configured to the power control that D2D is transmitted
Parameter processed；
The network equipment will be sent to terminal for the power contorl parameters of N number of resource area configuration.
2. the method as described in claim 1, which is characterized in that it is described obtain N number of resource area after, further includes:
The network equipment is N number of resource area configuration preference level, and the priority that will be configured for N number of resource area
It is sent to the terminal；Wherein, the priority of the resource area big to cellular transmission signal interference intensity configuration is lower than to honeycomb
Transmit the priority of the low resource area configuration of signal interference intensity.
3. the method as described in any one of claims 1 to 2, which is characterized in that the transfer resource pond is that the network is set
Set of the back-up dispensing cell for all Physical Resource Block of D2D transmission；
The network equipment will be sent to terminal for the power contorl parameters of N number of resource area configuration, comprising:
The network equipment is by system broadcasts signaling or dedicated signaling, the power control that will be configured for N number of resource area
Parameter processed is sent to the terminal in the cell.
4. method as claimed in claim 3, which is characterized in that further include:
Physical Resource Block in the transfer resource pond is distributed to the terminal in the cell and carries out D2D biography by the network equipment
After defeated, corresponding power contorl parameters are determined according to resource area belonging to the Physical Resource Block distributed；
The network equipment is right according to the terminal and the distance between the network equipment and/or path loss in the cell
The power contorl parameters determined are adjusted；
Power contorl parameters adjusted are sent to the terminal in the cell by the network equipment.
5. the method as described in any one of claims 1 to 2, which is characterized in that the transfer resource pond is that the network is set
Set of the back-up dispensing terminal for all Physical Resource Block of D2D transmission；
The network equipment will be sent to terminal for the power contorl parameters of N number of resource area configuration, comprising:
The network equipment is by system broadcasts signaling or dedicated signaling, the power control that will be configured for N number of resource area
Parameter processed is sent to the terminal.
6. the method as described in any one of claims 1 to 2, which is characterized in that the power contorl parameters include: path damage
Consume compensation factor, transmission objectives receives one of power, closed power adjusted value or any combination.
7. method as claimed in claim 6, which is characterized in that when the power contorl parameters include closed power adjusted value,
The network equipment will be sent to terminal for the power contorl parameters of N number of resource area configuration, comprising:
The network equipment sends closed loop transmission power to the terminal and controls TPC command, includes each money in the TPC command
The corresponding power contorl parameters of source region, and indicate resource-area corresponding to power contorl parameters one of in the following manner
Domain:
Radio network temporary identifier RNTI corresponding with resource area is carried in the TPC command；
The instruction information of resource area is carried in the DCI format in the TPC command；
By the mark of the closed power adjusted value carried in the TPC command resource area corresponding with the closed power adjusted value
Know and carry out combined coding, and is transmitted by the TPC command.
8. a kind of device-to-device D2D transmission power control method, which is characterized in that this method comprises:
Terminal receives the power contorl parameters of N number of resource area, wherein N number of resource area is the network equipment according to transmission
The D2D signal transmitted on Physical Resource Block in resource pool is to the interference strength of cellular transmission signal, to the transfer resource pond
In Physical Resource Block divided, N >=1, the transfer resource pond is the resource collection for D2D transmission；
The terminal, according to the power contorl parameters of N number of resource area, is determined in N number of money when carrying out D2D communication
Transimission power when D2D signal, the summation for the transimission power that the terminal is determined in N number of resource area are transmitted in source region
No more than the maximum transmission power of the terminal.
9. method according to claim 8, which is characterized in that each resource area in N number of resource area is provided with
Corresponding priority, wherein the priority of the resource area configuration big to cellular transmission signal interference intensity, which is lower than, passes honeycomb
The priority of the low resource area configuration of defeated signal interference intensity；
Transimission power when D2D signal is transmitted in the determination in N number of resource area, comprising:
The terminal is distributed in N number of resource area when transmitting D2D signal according to the priority of N number of resource area
Transimission power.
10. method as claimed in claim 8 or 9, which is characterized in that the power control according to N number of resource area
Parameter determines transimission power when transmitting D2D signal in N number of resource area, comprising:
The terminal estimate the network equipment between the terminal path loss or the terminal believe to the D2D
Number reception terminal between path loss, according to the power contorl parameters of the path loss and N number of resource area
Determine transimission power when transmitting D2D signal in N number of resource area.
11. method as claimed in claim 8 or 9, which is characterized in that the power contorl parameters include: path loss compensation
The factor, transmission objectives receive one of power, closed power adjusted value or any combination.
12. a kind of network equipment characterized by comprising
Division unit, for according to the D2D signal transmitted on the Physical Resource Block in transfer resource pond to cellular transmission signal
Interference strength divides the Physical Resource Block in the transfer resource pond, obtains N number of resource area, N >=1；
Parameter configuration unit, for be respectively each resource area in N number of resource area be configured to D2D transmission function
Rate control parameter；
Transmission unit, for will be that the power contorl parameters that N number of resource area configures are sent to terminal.
13. the network equipment as claimed in claim 12, which is characterized in that the parameter configuration unit obtains N number of resource area
Later, further includes:
For N number of resource area configuration preference level, and the end will be sent to for the priority of N number of resource area configuration
End；Wherein, the priority of the resource area big to cellular transmission signal interference intensity configuration is lower than to cellular transmission signal interference
The priority of the low resource area configuration of intensity.
14. the network equipment described in any one of claim 12 to 13, which is characterized in that the transfer resource pond is described
The network equipment distributes to set of the serving cell for all Physical Resource Block of D2D transmission；
The transmission unit is used for:
By system broadcasts signaling or dedicated signaling, will be sent to for the power contorl parameters of N number of resource area configuration
Terminal in the cell.
15. the network equipment as claimed in claim 14, which is characterized in that further include:
Physical Resource Block in the transfer resource pond is distributed to the terminal in the cell and carries out D2D biography by the division unit
After defeated, corresponding power contorl parameters are determined according to resource area belonging to the Physical Resource Block distributed；
The network equipment is right according to the terminal and the distance between the network equipment and/or path loss in the cell
The power contorl parameters determined are adjusted；
Power contorl parameters adjusted are sent to the terminal in the cell by the network equipment.
16. the network equipment described in any one of claim 12 to 13, which is characterized in that the transfer resource pond is described
Division unit distributes to set of the terminal for all Physical Resource Block of D2D transmission；
The transmission unit is used for:
By system broadcasts signaling or dedicated signaling, will be sent to for the power contorl parameters of N number of resource area configuration
The terminal.
17. the network equipment described in any one of claim 12 to 13, which is characterized in that the power contorl parameters packet
Include: path loss compensation factor, transmission objectives receive one of power, closed power adjusted value or any combination.
18. the network equipment as claimed in claim 17, which is characterized in that the power contorl parameters include closed power adjustment
When value, the transmission unit is used for:
Closed loop transmission power is sent to the terminal and controls TPC command, includes that each resource area is corresponding in the TPC command
Power contorl parameters, and indicate resource area corresponding to power contorl parameters one of in the following manner:
Radio network temporary identifier RNTI corresponding with resource area is carried in the TPC command；
The instruction information of resource area is carried in the DCI format in the TPC command；
By the mark of the closed power adjusted value carried in the TPC command resource area corresponding with the closed power adjusted value
Know and carry out combined coding, and is transmitted by the TPC command.
19. a kind of terminal characterized by comprising
Receiving unit, for receiving the power contorl parameters of N number of resource area, wherein N number of resource area is the network equipment
According to the D2D signal transmitted on the Physical Resource Block in transfer resource pond to the interference strength of cellular transmission signal, to the biography
What the Physical Resource Block in defeated resource pool was divided, N >=1；
Determination unit, for according to the power contorl parameters of N number of resource area, determining described when carrying out D2D communication
Transimission power when D2D signal is transmitted in N number of resource area, the summation for the transimission power determined in N number of resource area is not
Greater than the maximum transmission power of terminal.
20. terminal as claimed in claim 19, which is characterized in that each resource area setting in N number of resource area
There is corresponding priority, wherein the priority of the resource area configuration big to cellular transmission signal interference intensity is lower than to honeycomb
Transmit the priority of the low resource area configuration of signal interference intensity；
Transimission power when D2D signal is transmitted in the determination in N number of resource area, comprising:
The terminal is distributed in N number of resource area when transmitting D2D signal according to the priority of N number of resource area
Transimission power.
21. the terminal as described in claim 19 or 20, which is characterized in that the determination unit is used for:
Estimate the network equipment between the terminal path loss or the terminal to the D2D signal reception
Path loss between terminal is determined according to the power contorl parameters of the path loss and N number of resource area in institute
State transimission power when transmitting D2D signal in N number of resource area.
22. the terminal as described in claim 19 or 20, which is characterized in that the power contorl parameters include: that path loss is mended
Repay the factor, transmission objectives receives one of power, closed power adjusted value or any combination.
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