CN105813186B - A kind of method, apparatus and system determining transmission power for user equipment - Google Patents
A kind of method, apparatus and system determining transmission power for user equipment Download PDFInfo
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- CN105813186B CN105813186B CN201410855426.5A CN201410855426A CN105813186B CN 105813186 B CN105813186 B CN 105813186B CN 201410855426 A CN201410855426 A CN 201410855426A CN 105813186 B CN105813186 B CN 105813186B
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Abstract
The object of the present invention is to provide a kind of method, apparatus and system that transmission power is determined for user equipment.Wherein, base station is user device configuration power-related parameter collection corresponding with its present communications mode according to the present communications mode of its each user equipment serviced, thus, each user equipment can adjust respective transmission power accordingly.Specifically, when user equipment is in D2D communication, a possibility that communicating the interference to cellular link according to the D2D, adjust the current transmission power of the user equipment, such as reduce interference of the user equipment to the uplink of base station by reducing current transmission power, or do not interfere uplink or to uplink channel interference it is smaller when suitably enhancing current transmission power promote D2D performance；It is multiplexed same subframe collection when user equipment is in the communication with base station and is in the user equipment that D2D is communicated with other, the current transmission power of the user equipment is configured, to reduce its interference to D2D user equipment.
Description
Technical field
The present invention relates to mobile communication technology fields, more particularly to a kind of is user equipment (UE, User Equipment)
Determine the technology of transmission power.
Background technique
Currently, the appearance of location-based social networks causes people to adjacent network (proximity-aware
Network extensive concern), adjacent network can provide equipment room direct communication (D2D, Device to for user equipment
Device communication service).D2D at cellular system (cellular infrastructure) can provide many communications
Chance, to increase the handling capacity of communication system and promote user experience.To support this adjacent network, 3GPP (3rd
Generation Partnership Project, third generation partner program) in SA (Service and System
Aspects, service and system aspects) and RAN (Radio Access Network, wireless access network) field started recent studies on
Project.In these areas, public safety has been considered as a kind of for supporting the typically used as example of urgency communication scene.
However, when supporting D2D communication in cellular network, if cellular communication link and D2D link run on same frequency band,
Serious interference will be caused, this interference can be referred to as interlayer interference (inter-layer interference).Interlayer is dry
Disturb the focal issue for being considered as 3GPP current research.
Fig. 1 is the schematic diagram for showing the interlayer interference scene between cellular communication link and D2D link.
As shown in Figure 1, UE101, UE102 and UE103 are in a base station (NB/eNB, Node B/evolved Node
B coverage area) simultaneously provides mobile communication service by the base station, therefore the base station is the serving BS of UE101, UE102 and UE103
(serving NB/eNB).Here, base station includes but is not limited to any to provide communication for the user equipment in its coverage area
The base station of service, macro base station (macro eNB), micro-base station (micro eNB), femto base station (fetmo eNB) etc..For
For the sake of simple declaration, only illustrated in this specification with macro base station.
Wherein, UE101 and UE102 is currently at D2D communication, both uses the uplink resource of cellular system；UE3
It is currently at the communication with base station.For the sake of simple declaration, the user equipment for being currently at D2D communication can be referred to as D2D use
Family equipment (D2D UE)；Macro user equipment (macro can be referred to as with the user equipment of the communication of macro base station by being currently at
UE)。
The example of two kinds of interlayer interference shown in figure 1 is as follows:
The first interlayer interference
D2D user equipment may cause the interference to cellular communication.For example, D2D link can be to user equipment to eNB/NB
Uplink interfere.In Fig. 1, D2DUE101 and D2DUE102 are the interference source for generating this interlayer interference.
Second of interlayer interference
If macro user equipment uses same asset with D2D user equipment, macro user equipment, which may cause, sets D2D user
Standby interference.Even if should be noted that macro user equipment using the adjacent resource blocks with D2D user equipment same subframe, due in band
Still there is the interference of D2D user equipment in radiation, macro user equipment.In Fig. 1, macro UE103 is to generate this interlayer interference
Interference source.
In general, the transmission power of user equipment is bigger, generated interference is also bigger；The transmission power of user equipment is got over
Small, generated interference is also smaller.Therefore, the adjustment of user equipment transmitting power may be implemented to produce the user equipment
The adjustment of raw interference.
Power control mode has been defined in 3GPP.For example, user equipment can be based on path loss measurement and eNB
Configuration is specific such as following equation 1 to determine transmission power:
Ptx=min { Pmax,P0+α·PL+10log10(M)+f (t) } formula 1
Wherein,
PmaxIndicate the maximum transmission power of user equipment；
P0The target signal to noise ratio for indicating the user equipment of cell specific (cell-specific), is provided by eNB/NB；
α is the cell-specific parameters that eNB/NB is provided；
PL indicates that the path loss from eNB/NB to user equipment, the downlink loss are voluntarily measured by user equipment；
M indicates the bandwidth of the user equipment uplink resource allocation；
F (t) indicates that eNB/NB is determined at each Transmission Time Interval (TTI, Transmission Time Interval)
Closed-loop user equipment specific (UE-specific) parameter；
PtxThe transmission power for indicating the user equipment based on determined by above-mentioned parameter, here, PtxTake PmaxAnd P0+α·PL+
10log10(M) lesser numerical value in the two numerical value of+f (t), thus PtxMaximum does not exceed Pmax。
Here, power control mode shown by formula 1 only accounts for being currently at the user equipment with the communication of base station,
And the D2D user equipment for being currently at D2D communication is not considered.Therefore, above-mentioned up-link power control mode is not applied for
There are the scenes of a variety of interlayer interferences, and can not be suitable for biggish disturbance fluctuation.This not only may cause on significant
Line link honeycomb performance loss, it is also possible to be unfavorable for D2D communication performance.
Summary of the invention
The object of the present invention is to provide a kind of method, apparatus and system that transmission power is determined for user equipment.
According to an aspect of the invention, there is provided a kind of method for determining transmission power at user equipment end, wherein should
Method includes:
It is adjusted according to the present communications mode of user equipment based on power-related parameter collection corresponding to respective communication mode
The transmission power of the whole user equipment；
Wherein, the power-related parameter collection includes at least following parameter:
The target signal to noise ratio of the user equipment；
Weight of the user equipment in the path loss correlation of its present communications mode；
Wherein, the transmission power of the adjustment user equipment further comprises:
When the user equipment is currently at equipment room direct communication (D2D), according to D2D communication to cellular communication
Interference a possibility that, adjust the current transmission power of the user equipment；
When the user equipment is currently at the cellular communication of the serving BS and is in what D2D was communicated with other
User equipment is multiplexed same subframe collection, reduces the current transmission power of the user equipment.
According to another aspect of the present invention, it additionally provides and a kind of determines transmission power in base station end assisting user equipment
Method, wherein this method comprises:
According to the present communications mode for each user equipment that base station is serviced, for the user device configuration, it is current logical
Power-related parameter collection corresponding to letter mode；
Wherein, the power-related parameter collection includes at least following parameter:
The target signal to noise ratio of the user equipment；
Weight of the user equipment in the path loss correlation of its present communications mode.
According to an aspect of the invention, there is provided a kind of device for determining transmission power at user equipment end, wherein should
Device is used for:
It is adjusted according to the present communications mode of user equipment based on power-related parameter collection corresponding to respective communication mode
The transmission power of the whole user equipment；
Wherein, the power-related parameter collection includes at least following parameter:
The target signal to noise ratio of the user equipment；
Weight of the user equipment in the path loss correlation of its present communications mode；
Wherein, the transmission power of the adjustment user equipment further comprises:
When the user equipment is currently at equipment room direct communication (D2D), according to D2D communication to cellular communication
Interference a possibility that, adjust the current transmission power of the user equipment；
When the user equipment is currently at the cellular communication of the serving BS and is in what D2D was communicated with other
User equipment is multiplexed same subframe collection, reduces the current transmission power of the user equipment.
According to another aspect of the present invention, it additionally provides and a kind of determines transmission power in base station end assisting user equipment
Device, wherein the device is used for:
According to the present communications mode for each user equipment that base station is serviced, for the user device configuration, it is current logical
Power-related parameter collection corresponding to letter mode；
Wherein, the power-related parameter collection includes at least following parameter:
The target signal to noise ratio of the user equipment；
Weight of the user equipment in the path loss correlation of its present communications mode.
Compared with prior art, the present invention is by base station according to the present communications mode of its each user equipment serviced
User device configuration power-related parameter collection corresponding with its present communications mode, thus, worked as by each user equipment according to it
Preceding communication mode and corresponding power relevant parameter set, adjust respective transmission power.Specifically, when user equipment is currently at
A possibility that D2D is communicated, and communicates the interference to cellular link according to the D2D, adjusts the current transmission power of the user equipment, such as
Interference of the user equipment to the uplink of base station is reduced by reducing current transmission power, or is not interfering uplink
Road or it is smaller to uplink channel interference when enhance current transmission power and promote D2D performance；When user equipment is currently at and base
Communicating and being in the user equipment that D2D is communicated with other for standing is multiplexed same subframe collection, configures the current transmitting of the user equipment
Power, to reduce interference of the user equipment to D2D user equipment.
The invention proposes a kind of schemes of the reduction interlayer interference of enhancing, to support the D2D under cellular network to communicate.This
Invention at least has the advantage that
1) D2D communication is controlled and is managed comprehensively by network by parameter that base station is configured, this belongs to the main of 3GPP
Target.
2) interlayer interference between cellular communication link and D2D link is lowered.
According to a preferred embodiment of the present invention, pass through the interaction of base station and user equipment, on the one hand, work as user equipment
When the first the interlayer interference possibility generated to base station is higher, such as when D2D user equipment is closer apart from base station, the present invention can
Interlayer interference caused by D2D user equipment is reduced in a manner of by reducing transmission power；On the other hand, work as user equipment
To base station generate the first interlayer interference possibility it is lower when, such as D2D user equipment apart from base station farther out when, the present invention also
The D2D performance of user equipment can be promoted by adjusting transmission power.
Detailed description of the invention
By reading a detailed description of non-restrictive embodiments in the light of the attached drawings below, of the invention other
Feature, objects and advantages will become more apparent upon:
Fig. 1 shows the schematic diagram of the interlayer interference scene between cellular communication link and D2D communication link；
Fig. 2 shows a kind of method flow diagrams that transmission power is determined for user equipment according to an embodiment of the invention；
Fig. 3 shows a kind of schematic diagram of interlayer interference scene in accordance with a preferred embodiment of the present invention；
Fig. 4 shows a kind of signal that transmission power is determined for D2D user equipment in accordance with a preferred embodiment of the present invention
Figure；
Fig. 5 show base station based on macro user equipment whether with other user equipmenies multiplexing same subframes communicate in D2D
Collect to configure the schematic diagram of different capacity relevant parameter set；
Fig. 6 show cooperated in base station in accordance with another embodiment of the present invention and user equipment for user equipment it is true
Determine the schematic device of transmission power.
The same or similar appended drawing reference represents the same or similar component in attached drawing.
Specific embodiment
It is the scheme that user equipment determines transmission power the invention proposes a kind of enhancing, this scheme can be used for dropping
Low interlayer interference.Previously discussed two kinds of interlayer interferences can be solved.
Here, the present invention is only to be designed specifically to example in LTE system for the sake of simple declaration.Those skilled in the art answer
It can understand, the present invention is readily applicable to other systems, and such as IEEE802.16m is similar.
Present invention is further described in detail with reference to the accompanying drawing.
Fig. 2 shows method flow diagrams according to an embodiment of the invention, and specifically illustrating a kind of is that user equipment determines
The process of transmission power.
As shown in Fig. 2, in step s 201, base station is according to the present communications mode of its each user equipment serviced
Power-related parameter collection corresponding to its present communications mode of each user device configuration；In step S202, each user equipment
The transmitting of the user equipment is adjusted based on power-related parameter collection corresponding to the communication mode according to its present communications mode
Power.
Specifically, in step s 201, base station is each use according to the present communications mode of its each user equipment serviced
Power-related parameter collection corresponding to its present communications mode of family device configuration, wherein power-related parameter collection include at least with
Lower parameter: the 1) target signal to noise ratio of user equipment；2) weight of the user equipment in the path loss correlation of its present communications mode.
Here, it includes but is not limited to various parameters relevant to the transmission power of user equipment that power-related parameter, which is concentrated,.
In the next steps, the power-related parameter collection that base station is configured by user equipment will affect the transmission power of user equipment, into
And influence user equipment generated interlayer interference under respective communication mode.
For example, power-related parameter collection includes at least following parameter:
1) target signal to noise ratio of user equipment, such as uses P0To indicate.
2) user equipment is such as indicated with α in the weight of the path loss correlation of its present communications mode.
Therefore, power-related parameter collection can use (P0, α) and it indicates.
Here, difference with the prior art of the present invention is: the prior art does not consider the present communications side of user equipment
The relationship of formula and power-related parameter collection.No matter which kind of currently employed communication mode of user equipment, base station is that user equipment is matched
Set identical power-related parameter collection.And in the present invention, base station can be set according to the present communications mode of user equipment for user
It is standby to configure power-related parameter collection corresponding to its present communications mode.
Specifically, the present communications mode of user equipment includes but is not limited to any one of following:
1) D2D is communicated.
Here, the target signal to noise ratio that base station is D2D user device configuration can further use P0-D2DIt indicates, D2D user
The weight that equipment carries out the second path loss of another D2D user equipment of D2D communication with it can further use αD2DCarry out table
Show.
2) user equipment, which is communicated with base station and is in the user equipment that D2D is communicated with other, is multiplexed same subframe collection.
Here, being communicated with base station and can be referred to as with the user equipment of D2D user equipment multiplexing same subframe collection
Cellular communication user equipment, macro UE103 as shown in figure 1.Base station is that the target signal to noise ratio of cellular communication user device configuration can be with
Further use P0-macro* it indicates, cellular communication user equipment can be further with respect to the weight that the first path of base station is lost
Use αmacro* it indicates.
3) user equipment, which is communicated with base station but is not in the user equipment that D2D is communicated with other, is multiplexed same subframe
Collection.
Here, communicated with base station but not with D2D user equipment multiplexing same subframe collection user equipment can be claimed
For normal user equipments, since it will not generate interlayer interference to D2D user equipment, therefore not discussion range of the invention it
It is interior.Base station is that the target signal to noise ratio of normal user equipments configuration can further use P0-macroIt indicates, normal user equipments phases
α can be used further to the weight of the first path loss of base stationmacroTo indicate.
In order to adjust transmission power of the user equipment under each communication mode, the corresponding function of above-mentioned each communication mode institute
Rate relevant parameter set (P0, α) and it is different.
In step S202, each user equipment is according to its present communications mode, based on function corresponding to the communication mode
Rate relevant parameter set adjusts the transmission power of the user equipment.Wherein, it 1) is communicated when a user equipment is currently at D2D, according to
The D2D communicates a possibility that interference to cellular communication, adjusts the current transmission power of the D2D user equipment；2) as a user
Equipment, which is currently at the cellular communication with base station and is in the user equipment that D2D is communicated with other, is multiplexed same subframe collection, reduces
The current transmission power of the cellular communication user equipment.
Cooperation is currently at D2D communication refering to Fig. 3, UE301 and UE302, and D2D communication produces the uplink of base station
Raw interference.UE303 and UE304 is currently at the cellular communication with base station.Also, macro UE303 distance D2D UE301 and D2D
UE302 farther out, same subframe collection can be multiplexed with D2D UE301 and D2D UE302, therefore communicates to the D2D and generates interference.It is macro
UE304 distance D2D UE301 and D2D UE302 are closer, and same subframe collection can not be multiplexed with D2D UE301 and D2D UE302, therefore
The D2D will not be communicated and generate interference.
Here, those skilled in the art will be understood that above-mentioned macro UE and D2D UE is only based on UE present communications mode
Relative concept, a UE are D2D UE when D2D is communicated, and are being communicated with base station and are being multiplexed same subframe with other D2D UE
It is then macro UE when collection.
Specifically to discuss the configuration and transmitting of power-related parameter collection with regard to the different communication mode of user equipment individually below
The adjustment of power.
D2D communication
Here, based on the corresponding power-related parameter collection of D2D communication, being pressed when a user equipment is currently at D2D communication
A possibility that communicating the interference to cellular communication according to the D2D, adjusts the current transmission power of the D2D user equipment.
A possibility that preferable example according to the present invention, D2D communicates the interference to cellular communication, is right by D2D communication institute
Power-related parameter collection (the P answered0-D2D, αD2D) Lai Tixian.Accordingly, the current transmission power of D2D user equipment can pass through following public affairs
Formula 2 determines:
PTx-D2D=min{Pmax,P0-D2D+αD2D·PLD2D+10log10(M)+f(t)}
Formula 2
Wherein,
PmaxIndicate the maximum transmission power of user equipment；
P0-D2DThe target signal to noise ratio for indicating the specific D2D user equipment of cell, is provided by eNB/NB；
PLD2DIndicate that opposite the second path for carrying out another D2D user equipment of D2D communication with it of the D2D user equipment is damaged
Consumption pays attention to communicating broadcast/multi broadcast, PLD2DIt can be pre-configuration；
αD2DIndicate the weight of the second path loss；
M indicates the bandwidth of the user equipment uplink resource allocation；
F (t) indicates the specific parameter of Closed-loop user equipment that eNB/NB is determined in each TTI；
Ptx-D2DThe transmission power for indicating the D2D user equipment based on determined by above-mentioned parameter, here, Ptx-D2DTake PmaxWith
P0-D2D+αD2D·PLD2D+10log10(M) lesser numerical value in the two numerical value of+f (t), thus Ptx-D2DMaximum does not exceed
Pmax。
In general, base station is the P of D2D user device configuration0-12DAnd αD2DValue is lower, so that D2D user equipment determines therefrom that
Transmission power be also decreased relatively.Therefore, D2D user equipment is also relatively lowered the interference of cellular communication.
Another preferable example according to the present invention, the corresponding power-related parameter collection of D2D communication includes the D2D user
The target signal to noise ratio P of equipment0-D2D, the D2D user equipment is opposite to carry out the second of another D2D user equipment of D2D communication with it
The weight α of path lossD2DAnd D2D communication is to the interference weights omega of cellular communication.Accordingly, D2D user equipment is current
Transmission power can be determined by following equation 3:
PTx-D2D=min{Pmax,ω·[P0-D2D+αD2D·PLD2D+10log10(M)+f(t)]}
Formula 3
Wherein,
PmaxIndicate the maximum transmission power of user equipment；
P0-D2DThe target signal to noise ratio for indicating the specific D2D user equipment of cell, is provided by eNB/NB；
PLD2DIndicate that opposite the second path for carrying out another D2D user equipment of D2D communication with it of the D2D user equipment is damaged
Consumption pays attention to communicating broadcast/multi broadcast, PLD2DIt can be pre-configuration；
αD2DIndicate the weight of the second path loss；
M indicates the bandwidth of the user equipment uplink resource allocation；
F (t) indicates the specific parameter of Closed-loop user equipment that eNB/NB is determined in each TTI；
ω indicates D2D communication to the interference weight of cellular communication；
Ptx-D2DThe transmission power for indicating the D2D user equipment based on determined by above-mentioned parameter, here, Ptx-D2DTake PmaxWith
ω·[P0-D2D+αD2D· PL2D+10log10(M)+f (t)] lesser numerical value in the two numerical value, thus Ptx-D2DMaximum will not
More than Pmax。
Preferably, a possibility that generating interference to cellular communication, is communicated according to D2D, ω is further divided into, such as is set as
ω1And ω2And ω1<ω2。
When larger when D2D user equipment generates interference to cellular communication a possibility that, as to be located at base station attached for D2D user equipment
Closely, if the current transmission power of the D2D user equipment is larger, its transmission power should be reduced, which can be based on
Above-mentioned formula 3 simultaneously uses ω1To adjust its current transmission power.
When D2D user equipment to cellular communication generate interference a possibility that it is smaller when, as D2D user equipment apart from base station compared with
Far, if the current transmission power of the D2D user equipment is smaller, its transmission power can be enhanced, which can be based on
Above-mentioned formula 3 simultaneously uses ω2To adjust its current transmission power.
Here, ω1And ω2It can be allocated based on D2D user equipment with respect to the distance of base station, such as to positioned at base station
Serving cell edge D2D user equipment use ω2Its current transmission power is adjusted, to the non-D2D positioned at cell edge
User equipment uses ω1To adjust its current transmission power.
Alternatively, ω1And ω2It can also be allocated based on the second path loss of D2D user equipment, such as to
The biggish D2D user equipment of two path losses uses ω2Its current transmission power is adjusted, it is to the second path loss lesser
D2D user equipment uses ω1To adjust its current transmission power.
Wherein, ω1And ω2Value can be there are many form.For example, ω1< 1, ω2>1.For another example, 0 < ω1< 0.5,0.5 <
ω2<1。
Cooperation is refering to Fig. 4, wherein D2D UE401 and D2D UE402 are closer apart from base station, thus the transmission power of the two
Based on above-mentioned formula 3 and use ω1To adjust；D2D UE403 and D2D UE404 are in the serving cell edge of base station, thus
The transmission power of the two is based on above-mentioned formula 3 and uses ω2To adjust.Accordingly, the D2D of D2D UE401 and D2D UE402 are communicated
The interference of uplink is lowered, and since interference of D2D UE403 and the D2D UE404 to uplink is lower, thus two
Person is allowed to using relatively high transmission power.
Another preferable example according to the present invention, D2D communication can further pass through the interference potential of cellular communication
Difference of the D2D user equipment with respect to the first path of base station loss and both average path loss of all user equipmenies of the base station
Value embodies.
Here, power-related parameter collection corresponding to D2D communication is in addition to P0-D2DAnd αD2D, can also further comprise average road
The weight of diameter loss and its difference being lost with first path.Therefore, D2D user equipment can be lost and put down according to first path
The equal difference of path loss and the weight of the difference and the second path loss and its weight adjust the current hair of user equipment
Penetrate power.
Specifically, D2D user equipment can be located at different location and cause the interference to base station different stage.Here, having
Reason assumes that the higher D2D user equipment of interlayer interference potential is generated to base station should emit relative low-power to meet D2D and lead to
Letter demand.These usual D2D user equipmenies are located at the adjacent domain of base station.In contrast, generating interlayer interference to base station may
Property lower D2D user equipment allow to emit relative high powers, to support high D2D rate.These usual D2D user equipmenies away from
Farther out from base station.To solve this problem, following two cell-specific parameters are introduced into the transmitting function to determine D2D user equipment
Rate.
Parameter PLavgFor cell-specific parameters, the average path loss of all user equipmenies in base station is indicated, and join
Number PLavgIt can be semi-statically configured by base station.
Parameter beta is cell-specific parameters, indicates the weight of first path loss and the difference of average path loss.Parameter
β can take the value less than or equal to 1, and parameter beta indicates to allow part interference compensation.
These cell-specific parameters can be determined by base station based on information such as interference environment, system loads.
Specifically, D2D user equipment can determine current transmission power based on following equation 4:
Ptx-D2D=min { Pmax,P0-D2D+αD2D·PLD2D+β(PLeNB-PLavg)+10log10(M)+f(t)}
Formula 4
Wherein,
PmaxIndicate the maximum transmission power of user equipment；
P0-D2DThe target signal to noise ratio for indicating the specific D2D user equipment of cell, is provided by eNB/NB；
PLD2DIndicate that opposite the second path for carrying out another D2D user equipment of D2D communication with it of the D2D user equipment is damaged
Consumption pays attention to communicating broadcast/multi broadcast, PLD2DIt can be pre-configuration；
αD2DIndicate the weight of the second path loss；
PLeNBIndicate the first path loss of the user equipment from eNB/NB to D2D, the downlink loss is by user equipment
Voluntarily measure；
PLavgIndicate the average path loss for all user equipmenies that base station is serviced, which can be by base station in network
It is determined when deployment or implementation optimization based on static network environment；
PLeNB-PLavgIndicate the difference of first path loss and average path loss；
β indicates the weight of first path loss and the difference of average path loss, and β can be used for part interference compensation；
M indicates the bandwidth of the user equipment uplink resource allocation；
F (t) indicates the Closed-loop user equipment special parameter that base station is determined in each TTI；
Ptx-D2DThe transmission power for indicating the D2D user equipment based on determined by above-mentioned parameter, here, Ptx-D2DTake PmaxWith
P0-D2D+αD2D·PLD2D+β(PLeNB-PLavg)+10log10(M) lesser numerical value in the two numerical value of+f (t), thus Ptx-D2DMost
P is not exceeded greatlymax。
Above-mentioned parameter P0-D2D、αD2D、PLavg, β be comprised in the corresponding power-related parameter of D2D communication and concentrate, by base station
To be configured to D2D user equipment.
Pass through above-mentioned formula 4, it can be seen that following two points:
First: for apart from the closer D2D user equipment in base station, of this D2D user equipment with respect to its serving BS
One path loss is lower (that is, having more high interference possibility), PLeNB-PLavgFor a negative value, therefore, these D2D users
Equipment will use relatively low transmission power.
Second: for apart from the closer D2D user equipment in base station, of this D2D user equipment with respect to its serving BS
One path loss is higher (that is, the interlayer interference generated is lower), and this D2D user equipment can use relatively high transmitting function
Rate.This will be particularly useful for the D2D user equipment of cell edge, these D2D user equipmenies are easy to by the macro user of adjacent cell
Equipment interference.
With the communication of base station
Cooperation is refering to Fig. 3 and Fig. 5, for that can be in other in the user equipment with the cellular communication of base station
The user equipment multiplexing same subframe of D2D communication integrates (at this time as cellular communication user equipment), and such as macro UE303 can not also be with
Other user equipment multiplexing same subframes for being in D2D communication integrate (at this time as normal user equipments), such as macro UE304.For convenience
Illustrate, is illustrated below with macro UE303 and macro UE304 to illustrate the present invention.
A preferable example according to the present invention, base station can be macro UE303 configuration such as power-related parameter collection
(P0-macro, αmacro, θ), suitably to reduce its transmission power.Accordingly, macro UE303 can adjust its transmitting by following equation 5
Power:
PTx-macro=min{Pmax,θ·[P0-macro+αmacro·PLeNB+10log10(M)+f(t)]}
Formula 5
Wherein,
PmaxIndicate the maximum transmission power of user equipment；
P0-macroThe target signal to noise ratio for indicating the specific user equipment of cell, is provided by eNB/NB；
αmacroThe cell-specific parameters provided for eNB/NB；
PLeNB indicate from eNB/NB to user equipment first path loss, the downlink loss by user equipment from
Row measurement；
M indicates the bandwidth of the user equipment uplink resource allocation；
F (t) indicates the specific parameter of Closed-loop user equipment that eNB/NB is determined in each TTI；
θ indicates the power adjustment weight to cellular communication user equipment, θ < 1；
Ptx-macroThe transmission power for indicating the D2D user equipment based on determined by above-mentioned parameter, here, Ptx-macroTake Pmax
With θ [P0-macroαmacro·PLeNB+10log10(M)+f (t)] lesser numerical value in the two numerical value, thus Ptx-macroIt is maximum
P is not exceededmax。
Another preferable example according to the present invention, for macro UE303 and macro UE304, base station respective can work as according to its
Preceding communication mode configures different power-related parameter collection (P for the two0, α).For example, the power-related parameter collection of macro UE304
It is further configured to (P0-macro,αmacro), the power-related parameter collection of macro UE303 is further configured to (P0-macro*,
αmacro*).Here, (P0-macro*,αmacro* (P can also) be used0-macro,αmacro) * indicates.
Here, in configuration (P0-macro*,αmacro) and (P *0-macro,αmacro) when, different targets can be only arranged in base station
Signal-to-noise ratio, namely only P0-macro* with P0-macroIt is different；Alternatively, different user equipmenies can also be only arranged with respect to base station in base station
The weight of first path loss, namely only αmacroAnd α *macroIt is different；Alternatively, base station can also set target signal to noise ratio and user
The weight that the first path of standby opposite base station is lost is disposed as different.
For example, the macro user equipment for the user equipment multiplexing same subframe collection for being in D2D with other may cause second
Interlayer interference, and it is dry will not cause interlayer with the macro user equipment of other user equipment multiplexing same subframe collection for being in D2D
It disturbs.Therefore, (the P that base station is configured0-macro*,αmacro* it) can be configured as relatively small numerical value.Specifically, base station can be only
Configure relatively small P0-macro*；Alternatively, base station can also only configure relatively small αmacro*；Alternatively, base station can also match simultaneously
Set relatively small P0-macroAnd α *macro*。
More specifically, (P0-macro*,αmacro* (P) can be less than0-macro,αmacro).For example, P0-macro*<P0-macro；Or
Person, αmacro*<αmacro；Alternatively, P0-macro*<P0-macroAnd αmacro*<αmacro。
Mode through the above configuration, in the next steps, on the one hand, for being communicated with base station and being in other
The user equipment of the user equipment multiplexing same subframe collection of D2D communication, such as macro UE303, due to its corresponding power-related parameter
Collection is configured as relatively small, and the transmission power of macro UE303 will be lowered, and produced second of interlayer interference accordingly will also be dropped
It is low；On the other hand, for communicated with base station but not with other be in D2D user equipment multiplexing same subframe collection user
Equipment, such as macro UE304, corresponding power-related parameter collection are not changed compared with the prior art, therefore, the transmitting of macro UE304
Power will not be affected.
Cooperation is referring to Fig.2, communicating a user equipment with base station and being in the user equipment that D2D is communicated with other
It is multiplexed this communication mode of same subframe collection, base station is this corresponding power of cellular communication user device configuration in step S201
The mode of relevant parameter set includes but is not limited to 2 kinds following:
1) it is semi-statically configured.
When being semi-statically configured, power-related parameter collection (P corresponding to the communication mode0-macro,αmacro) * by with quilt
The subframe collection of multiplexing is associated to be pre-configured.
When being semi-statically configured, base station needs to indicate the subframe collection for D2D communication or non-D2D communication for user equipment.
Meanwhile power-related parameter collection (P0-macro,αmacro) * can be preconfigured is associated with the subframe collection being re-used.
Return to Fig. 5, base station can be pre-configured multiple groups power-related parameter collection, also, a subframe collection can be associated with it is more
Group power-related parameter collection, in a manner of supporting the different communication of user equipment when being re-used.For example, be re-used for one
Subframe collection should at least be associated with two groups of power-related parameter collection, such as (P0-D2D, αD2D) and (P0-macro,αmacro) *, to use respectively
In configuration D2D user equipment and cellular communication user equipment.
2) dynamic configuration.
When dynamic configuration, power-related parameter collection (P corresponding to the communication mode0-macro,αmacro) index of * sent out
It send to relative user equipment, such as macro UE303, so that macro UE303 is inquired according to the index corresponding to each multiplexed sub frame collection
Power-related parameter collection.
When dynamic configuration, base station is without sending signal to notify D2D subframe collection or non-D2D subframe collection.Therefore, base station can
Only power-related parameter collection to be notified to user equipment.For example, the index of one group of predefined power-related parameter collection can be with
It is sent to the user equipment communicated with base station by PDCCH signaling, so that it is when the user equipment for being in D2D with other
The index can be inquired when being multiplexed same subframe collection to determine corresponding power-related parameter collection.
Specifically, following table 1 shows the implementation example of the parameter value indexed including 4:
| Index | (P0-macro,αmacro)* |
| 0 | (P0-macro,αmacro)0 * |
| 1 | (P0-macro,αmacro)1 * |
| 2 | (P0-macro,αmacro)2 * |
| 3 | (P0-macro,αmacro)3 * |
Table 1
Those skilled in the art will be understood that in the index, absolute value or deviant can be used.
Here, being based on above-mentioned power-related parameter collection (P0-macro,αmacro) *, the transmission power of cellular communication user equipment
It can be adjusted by following equation 6:
PTx-macro=min{Pmax,P0-macro *+αmacro *·PLeNB+10log10(M)+f(t)}
Formula 6
Wherein,
PmaxIndicate the maximum transmission power of user equipment；
P0-macro *The target signal to noise ratio for indicating the specific user equipment of cell, is provided by eNB/NB；
αmacro *The cell-specific parameters provided for eNB/NB；
PLeNB indicate from eNB/NB to user equipment first path loss, the downlink loss by user equipment from
Row measurement；
M indicates the bandwidth of the user equipment uplink resource allocation；
F (t) indicates the specific parameter of Closed-loop user equipment that eNB/NB is determined in each TTI；
Ptx-macroThe transmission power for indicating the D2D user equipment based on determined by above-mentioned parameter, here, Ptx-macroTake Pmax
And P0-macro *+αmacro *·PLeNB+10log10(M) lesser numerical value in the two numerical value of+f (t), thus Ptx-macroMaximum will not
More than Pmax。
In conclusion the present communications mode for each user equipment that base station can be serviced according to it, is each user equipment
Configure power-related parameter collection corresponding to its present communications mode.In the next steps, each user equipment is current logical according to it
Letter mode adjusts respective transmission power based on power-related parameter collection corresponding to respective communication mode.Due to transmission power
Adjustment, interlayer interference caused by user equipment can also correspondingly be adjusted.
For example, base station is the D2D user device configuration if the present communications mode of a user equipment is D2D communication
Power-related parameter collection (P0-D2D, αD2D) lower numerical value can be taken.To which the first interlayer caused by D2D user equipment is dry
(such as D2D communicates the interference to uplink) is disturbed to be lowered.Here, those skilled in the art will be understood that D2D communication to honeycomb
The interference of communication is not limited in the interference to the uplink of base station, will when such as D2D communication using down-chain resource
Interference is generated to the downlink of base station to user equipment, so that according to the present invention, the interference of such pair of downlink equally may be used
It is lowered.
For another example, for the macro user equipment communicated with base station, if macro user equipment is in what D2D was communicated with other
User equipment is multiplexed same subframe collection, which will generate second of interlayer interference (i.e. its interference to D2D communication).
Therefore, it to solve the problems, such as second of interlayer interference, user equipment is communicated with base station and is in D2D with other is communicated
User equipment multiplexing same subframe collection, user equipment communicated with base station but be not in the user that D2D is communicated with other and set
Standby multiplexing both different communication modes of same subframe collection, the power that base station can be different for both macro user device configurations
Relevant parameter set, such as (P0-macro,αmacro) * and (P0-macro,αmacro).Preferably due to power-related parameter collection (P0-macro,
αmacro) value of * can be relatively low, therefore, the transmission power quilt that user equipment is determined based on the power-related parameter collection
Relatively reduce.
Here, the transmission power of user equipment is reduced for relative concept, that is, becoming since power-related parameter collection is opposite
Small, user equipment transmission power based on determined by lesser power-related parameter collection also relatively becomes smaller.User equipment
Transmission power be lowered not absolute probability because the current transmission power of user equipment depends not only on power-related parameter
Collection, additionally depends on the other factors such as path loss.
The beneficial effects of the invention are that power-related parameter collection is corresponding with the present communications mode of user equipment.
Also, since base station is when configuring power-related parameter collection, can be in for D2D user equipment, with base station communication and with other
The lesser power-related parameter of user device configuration of the user equipment multiplexing same subframe collection of D2D, thus respective user equipment
Current transmission power determined by final is also relatively lowered by, so interlayer interference caused by these user equipmenies also by
It reduces.
Fig. 6 shows an apparatus in accordance with one embodiment of the invention schematic diagram, specifically illustrates phase in base station and user equipment
Mutually cooperate the device to determine transmission power for user equipment.
It include power adjustment apparatus in user equipment 61 as shown in fig. 6, including parameter configuration device 620 in base station 62
610.Specifically, the present communications mode for each user equipment that parameter configuration device 620 is serviced according to base station 62 is each user
Power-related parameter collection corresponding to its present communications mode of device configuration；Correspondingly, the power adjustment in each user equipment
Device 610 is adjusted according to the present communications mode of the user equipment based on power-related parameter collection corresponding to the communication mode
The transmission power of the user equipment.
Specifically, the present communications mode for each user equipment that parameter configuration device 620 is serviced according to base station 62, is each
Power-related parameter collection corresponding to its present communications mode of user device configuration, wherein power-related parameter collection includes at least
Following parameter: the 1) target signal to noise ratio of user equipment；2) power of the user equipment in the path loss correlation of its present communications mode
Weight.
Here, it includes but is not limited to various parameters relevant to the transmission power of user equipment that power-related parameter, which is concentrated,.
In the next steps, the power-related parameter collection that base station is configured by user equipment will affect the transmission power of user equipment, into
And influence user equipment generated interlayer interference under respective communication mode.
For example, power-related parameter collection includes at least following parameter:
1) target signal to noise ratio of user equipment, such as uses P0To indicate.
2) user equipment is such as indicated with α in the weight of the path loss correlation of its present communications mode.
Therefore, power-related parameter collection can use (P0, α) and it indicates.
Specifically, the present communications mode of user equipment includes but is not limited to any one of following:
1) D2D is communicated.
When user equipment 61, which is in, to be communicated with the D2D of another user equipment, which is set at this time for D2D user
It is standby.
Here, the target signal to noise ratio that base station 62 is D2D user device configuration can further use P0-D2DIt indicates, D2D is used
The equipment opposite weight for carrying out the second path loss of another D2D user equipment of D2D communication with it in family can further use αD2D
To indicate.
2) user equipment, which is communicated with base station and is in the user equipment that D2D is communicated with other, is multiplexed same subframe collection.
When user equipment 61, which is in, to be communicated with base station and be multiplexed same subframe collection with D2D user equipment, the user
Equipment 61 can be referred to as cellular communication user equipment at this time, macro UE103 as shown in figure 1.
Here, the target signal to noise ratio that base station is cellular communication user device configuration can further use P0-macro* it indicates,
Cellular communication user equipment can further use α with respect to the weight that the first path of base station is lostmacro* it indicates.
3) user equipment, which is communicated with base station but is not in the user equipment that D2D is communicated with other, is multiplexed same subframe
Collection.
When user equipment 61, which is in, to be communicated with base station but be not multiplexed same subframe collection with D2D user equipment, the use
Family equipment 61 can be referred to as normal user equipments, since it will not generate interlayer interference to D2D user equipment, therefore not in this hair
Within the scope of bright discussion.
Here, the target signal to noise ratio that base station is normal user equipments configuration can further use P0-macroIt indicates, commonly
User equipment can further use α with respect to the weight that the first path of base station is lostmacroTo indicate.
In order to adjust transmission power of the user equipment under each communication mode, the corresponding function of above-mentioned each communication mode institute
Rate relevant parameter set (P0, α) and it is different.
The power adjustment apparatus 610 of each user equipment is based on the communication according to the present communications mode of the user equipment
Power-related parameter collection corresponding to mode, adjusts the transmission power of the user equipment.Wherein, 1) when a user equipment is currently located
It is communicated in D2D, a possibility that power adjustment apparatus 610 is communicated according to the D2D to the interference of cellular communication, adjusts the D2D user
The current transmission power of equipment；2) it is communicated when a user equipment is currently at the cellular communication with base station and is in D2D with other
User equipment be multiplexed same subframe collection, power adjustment apparatus 610 reduce the cellular communication user equipment current transmission power.
Specifically to discuss the configuration and transmitting of power-related parameter collection with regard to the different communication mode of user equipment individually below
The adjustment of power.
D2D communication
Here, when a user equipment is currently at D2D communication, the function corresponding based on D2D communication of power adjustment apparatus 610
Rate relevant parameter set a possibility that according to D2D communication to the interference of cellular communication, adjusts the current hair of the D2D user equipment
Penetrate power.
A possibility that preferable example according to the present invention, D2D communicates the interference to cellular communication, is right by D2D communication institute
Power-related parameter collection (the P answered0-D2D, αD2D) Lai Tixian.Accordingly, power adjustment apparatus 610 can be determined by above-mentioned formula 2
The current transmission power of D2D user equipment.
Another preferable example according to the present invention, the corresponding power-related parameter collection of D2D communication includes the D2D user
The target signal to noise ratio P of equipment0-D2D, the D2D user equipment is opposite to carry out the second of another D2D user equipment of D2D communication with it
The weight α of path lossD2DAnd D2D communication is to the interference weights omega of cellular communication.Accordingly, power adjustment apparatus 610 can
The current transmission power of D2D user equipment is determined by above-mentioned formula 3.
Another preferable example according to the present invention, D2D communication can further pass through the interference potential of cellular communication
Difference of the D2D user equipment with respect to the first path of base station loss and both average path loss of all user equipmenies of the base station
Value embodies.
Here, power-related parameter collection corresponding to D2D communication is in addition to P0-D2DAnd αD2D, can also further comprise average road
The weight of diameter loss and its difference being lost with first path.Therefore, power adjustment apparatus 610 can be lost according to first path
With the weight and the second path loss and its weight of the difference of average path loss and the difference, adjusted by above-mentioned formula 4
The current transmission power of whole user equipment.
With the communication of base station
The parameter configuration device 620 of a preferable example according to the present invention, base station 62 can set for cellular communication user
Standby configuration such as power-related parameter collection (P0-macro, αmacro, θ), suitably to reduce its transmission power.Accordingly, cellular communication user
The power adjustment apparatus 610 of equipment can adjust the transmission power of the user equipment by above-mentioned formula 5.
Another preferable example according to the present invention, for cellular communication user equipment and normal user equipments, base station
Parameter configuration device 620 can configure different power-related parameter collection (P for the two according to its respective present communications mode0,
α).For example, the power-related parameter collection of normal user equipments is further configured to (P0-macro,αmacro), cellular communication user
The power-related parameter collection of equipment is further configured to (P0-macro*,αmacro*).Here, (P0-macro*,αmacroIt *) can also be with
With (P0-macro,αmacro) * indicates.
The parameter configuration device 620 of base station 62 is the corresponding power-related parameter collection of this cellular communication user device configuration
Mode include but is not limited to following 2 kinds:
1) it is semi-statically configured.
When being semi-statically configured, power-related parameter collection (P corresponding to the communication mode0-macro,αmacro) * by with quilt
The subframe collection of multiplexing is associated to be pre-configured.
When being semi-statically configured, other specific devices in parameter configuration device 620 or base station 62 need for user equipment
Indicate the subframe collection for D2D communication or non-D2D communication.Meanwhile power-related parameter collection (P0-macro,αmacro) * can be pre-
It is configured to associated with the subframe collection being re-used.
Referring back to Fig. 5, the parameter configuration device 620 of base station 62 can be pre-configured multiple groups power-related parameter collection, also,
One subframe collection can be associated with multiple groups power-related parameter collection, to support the different communication side of user equipment when being re-used
Formula.For example, the subframe collection being re-used for one, should at least be associated with two groups of power-related parameter collection, such as (P0-D2D, αD2D)
(P0-macro,αmacro) *, to be respectively used to configuration D2D user equipment and cellular communication user equipment.
2) dynamic configuration.
When dynamic configuration, power-related parameter collection (P corresponding to the communication mode0-macro,αmacro) index of * sent out
It send to cellular communication user equipment, so that the power adjustment apparatus 610 of cellular communication user equipment is inquired often according to the index
Power-related parameter collection corresponding to a multiplexed sub frame collection.
When dynamic configuration, other specific devices in parameter configuration device 620 or base station 62 are without sending signal to lead to
Know D2D subframe collection or non-D2D subframe collection.Therefore, parameter configuration device 620 can only notify power-related parameter collection to user
Equipment.For example, the index of one group of predefined power-related parameter collection can be sent to by PDCCH signaling with base station 62 into
The user equipment of row communication, so that it is when the user equipment for being in D2D with other is multiplexed same subframe collection, power tune therein
Engagement positions 610 can inquire the index to determine corresponding power-related parameter collection.
Here, being based on above-mentioned power-related parameter collection (P0-macro,αmacro) *, the transmission power of cellular communication user equipment
It can be adjusted by power adjustment apparatus 610 by above-mentioned formula 6.
It should be noted that the present invention can be carried out in the assembly of software and/or software and hardware, for example, can adopt
With specific integrated circuit (ASIC), general purpose computer or any other realized similar to hardware device.In one embodiment
In, software program of the invention can be executed to implement the above steps or functions by processor.Similarly, of the invention
Software program (including relevant data structure) can be stored in computer readable recording medium, for example, RAM memory,
Magnetic or optical driver or floppy disc and similar devices.In addition, some of the steps or functions of the present invention may be implemented in hardware, example
Such as, as the circuit cooperated with processor thereby executing each step or function.
In addition, a part of the invention can be applied to computer program product, such as computer program instructions, when its quilt
When computer executes, by the operation of the computer, it can call or provide according to the method for the present invention and/or technical solution.
And the program instruction of method of the invention is called, it is possibly stored in fixed or moveable recording medium, and/or pass through
Broadcast or the data flow in other signal-bearing mediums and transmitted, and/or be stored according to described program instruction operation
In the working storage of computer equipment.Here, according to one embodiment of present invention including a device, which includes using
Memory in storage computer program instructions and processor for executing program instructions, wherein when the computer program refers to
When enabling by processor execution, method and/or skill of the device operation based on aforementioned multiple embodiments according to the present invention are triggered
Art scheme.
It is obvious to a person skilled in the art that invention is not limited to the details of the above exemplary embodiments, Er Qie
In the case where without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter
From the point of view of which point, the present embodiments are to be considered as illustrative and not restrictive, and the scope of the present invention is by appended power
Benefit requires rather than above description limits, it is intended that all by what is fallen within the meaning and scope of the equivalent elements of the claims
Variation is included in the present invention.Any reference signs in the claims should not be construed as limiting the involved claims.This
Outside, it is clear that one word of " comprising " does not exclude other units or steps, and odd number is not excluded for plural number.That states in system claims is multiple
Unit or device can also be implemented through software or hardware by a unit or device.The first, the second equal words are used to table
Show title, and does not indicate any particular order.
Claims (11)
1. a kind of method for determining transmission power at user equipment end, wherein this method comprises:
Institute is adjusted based on power-related parameter collection corresponding to respective communication mode according to the present communications mode of user equipment
State the transmission power of user equipment；
Wherein, the power-related parameter collection includes at least following parameter:
The target signal to noise ratio of the user equipment；
Weight of the user equipment in the path loss correlation of its present communications mode；
Wherein, the transmission power of the adjustment user equipment further comprises:
When the user equipment is currently at a possibility that D2D is communicated, communicated the interference to cellular communication according to the D2D, tune
The current transmission power of the whole user equipment；
When the user equipment is currently at the cellular communication with serving BS and is in the user equipment that D2D is communicated with other
It is multiplexed same subframe collection, reduces the current transmission power of the user equipment.
2. according to the method described in claim 1, wherein, being communicated when the user equipment is currently at D2D, path loss correlation
Including opposite the second path loss for carrying out another user equipment of D2D communication with it of the user equipment.
3. according to the method described in claim 2, wherein, the path loss correlation further includes the user equipment with respect to its clothes
The average path loss of all user equipmenies in the first path loss of business base station and the serving BS；
Wherein, the adjustment further comprises:
In conjunction with the weight of first path loss and the difference of the average path loss and the difference and described the
Two path losses and its weight adjust the current transmission power of the user equipment.
4. according to the method in any one of claims 1 to 3, wherein the user equipment is in and the serving BS
Cellular communication and when being in the user equipment that D2D communicates with other and being multiplexed same subframe collection, corresponding power relevant parameter set with
The user equipment, which is in the cellular communication of the serving BS but is not in the user equipment that D2D is communicated with other, is multiplexed phase
It is configured with power-related parameter collection corresponding when subframe collection different.
5. a kind of method for determining transmission power in base station end assisting user equipment, wherein this method comprises:
It is described its present communications side of user device configuration according to the present communications mode for each user equipment that base station is serviced
Power-related parameter collection corresponding to formula；
Wherein, the present communications mode of the user equipment includes any one of following:
- D2D communication；
It is communicated with the base station and is in the user equipment that D2D is communicated with other and be multiplexed same subframe collection；
It is communicated with the base station but is not in the user equipment that D2D is communicated with other and be multiplexed same subframe collection；
Wherein, the power-related parameter collection includes at least following parameter:
The target signal to noise ratio of the user equipment；
Weight of the user equipment in the path loss correlation of its present communications mode；
Wherein, the present communications mode of the user equipment includes being communicated and being in D2D with other to communicate with the base station
User equipment be multiplexed same subframe collection；Wherein, the configuration further comprises any one of following:
When being semi-statically configured, power-related parameter collection corresponding to the present communications mode by with the subframe that is re-used
Collection is associated to be pre-configured；
When dynamic configuration, the index of power-related parameter collection corresponding to the present communications mode is sent to application
Family equipment, so that relative user equipment inquires power-related parameter corresponding to each multiplexed sub frame collection according to the index
Collection.
6. a kind of device for determining transmission power at user equipment end, wherein the device is used for:
Institute is adjusted based on power-related parameter collection corresponding to respective communication mode according to the present communications mode of user equipment
State the transmission power of user equipment；
Wherein, the power-related parameter collection includes at least following parameter:
The target signal to noise ratio of the user equipment；
Weight of the user equipment in the path loss correlation of its present communications mode；
Wherein, the transmission power of the adjustment user equipment further comprises:
When the user equipment is currently at a possibility that D2D is communicated, communicated the interference to cellular communication according to the D2D, tune
The current transmission power of the whole user equipment；
When the user equipment is currently at the cellular communication with serving BS and is in the user equipment that D2D is communicated with other
It is multiplexed same subframe collection, reduces the current transmission power of the user equipment.
7. device according to claim 6, wherein when the user equipment is currently at D2D communication, path loss correlation
Including opposite the second path loss for carrying out another user equipment of D2D communication with it of the user equipment.
8. device according to claim 7, wherein the path loss correlation further includes the user equipment with respect to its clothes
The average path loss of all user equipmenies in the first path loss of business base station and the serving BS；
Wherein, the adjustment further comprises:
In conjunction with the weight of first path loss and the difference of the average path loss and the difference and described the
Two path losses and its weight adjust the current transmission power of the user equipment.
9. the device according to any one of claim 6 to 8, wherein the user equipment is in and the serving BS
Cellular communication and when being in the user equipment that D2D communicates with other and being multiplexed same subframe collection, corresponding power relevant parameter set with
The user equipment, which is in the cellular communication of the serving BS but is not in the user equipment that D2D is communicated with other, is multiplexed phase
It is configured with power-related parameter collection corresponding when subframe collection different.
10. a kind of device for determining transmission power in base station end assisting user equipment, wherein the device is used for:
It is described its present communications side of user device configuration according to the present communications mode for each user equipment that base station is serviced
Power-related parameter collection corresponding to formula；
Wherein, the present communications mode of the user equipment includes any one of following:
- D2D communication；
It is communicated with the base station and is in the user equipment that D2D is communicated with other and be multiplexed same subframe collection；
It is communicated with the base station but is not in the user equipment that D2D is communicated with other and be multiplexed same subframe collection；
Wherein, the power-related parameter collection includes at least following parameter:
The target signal to noise ratio of the user equipment；
Weight of the user equipment in the path loss correlation of its present communications mode；
Wherein, the present communications mode of the user equipment includes being communicated and being in D2D with other to communicate with the base station
User equipment be multiplexed same subframe collection；Wherein, the configuration further comprises any one of following:
When being semi-statically configured, power-related parameter collection corresponding to the present communications mode by with the subframe that is re-used
Collection is associated to be pre-configured；
When dynamic configuration, the index of power-related parameter collection corresponding to the present communications mode is sent to application
Family equipment, so that relative user equipment inquires power-related parameter corresponding to each multiplexed sub frame collection according to the index
Collection.
11. a kind of system for determining transmission power for user equipment, wherein the system includes such as any one of claim 6 to 9
Described determines the device of transmission power at user equipment end and as claimed in claim 10 in base station end assisting user equipment
Determine the device of transmission power.
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| WO2018058635A1 (en) * | 2016-09-30 | 2018-04-05 | 华为技术有限公司 | Method and device for controlling signal transmission |
| WO2018099572A1 (en) * | 2016-12-02 | 2018-06-07 | Huawei Technologies Duesseldorf Gmbh | Techniques for transmission based on numerology selection |
| WO2019013765A1 (en) * | 2017-07-11 | 2019-01-17 | Hewlett-Packard Development Company, L.P. | Transmission power adjustments |
| WO2019028923A1 (en) * | 2017-08-11 | 2019-02-14 | 华为技术有限公司 | Power control method and related device |
| CN110149689B (en) * | 2018-02-11 | 2022-03-25 | 华为技术有限公司 | Power control method and device |
| CN111480381B (en) * | 2018-03-01 | 2022-03-22 | Oppo广东移动通信有限公司 | Extended use method of terminal equipment, terminal equipment and network equipment |
| CN110381574A (en) * | 2018-04-12 | 2019-10-25 | 维沃移动通信有限公司 | Open-loop power control method and equipment in by-link communication |
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