CN104349437B - Method for inhibiting interference and user equipment - Google Patents
Method for inhibiting interference and user equipment Download PDFInfo
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- CN104349437B CN104349437B CN201310347939.0A CN201310347939A CN104349437B CN 104349437 B CN104349437 B CN 104349437B CN 201310347939 A CN201310347939 A CN 201310347939A CN 104349437 B CN104349437 B CN 104349437B
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- 238000000034 method Methods 0.000 title claims abstract description 74
- 230000002401 inhibitory effect Effects 0.000 title claims abstract description 13
- 230000005540 biological transmission Effects 0.000 claims abstract description 153
- 230000002452 interceptive effect Effects 0.000 claims abstract description 141
- 230000006854 communication Effects 0.000 claims abstract description 62
- 238000004891 communication Methods 0.000 claims abstract description 61
- 230000001413 cellular effect Effects 0.000 claims description 47
- 238000005259 measurement Methods 0.000 claims description 11
- 238000001228 spectrum Methods 0.000 claims description 8
- 230000009897 systematic effect Effects 0.000 claims description 6
- 241000264877 Hippospongia communis Species 0.000 description 55
- 238000012545 processing Methods 0.000 description 48
- 230000005764 inhibitory process Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
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- 241000208340 Araliaceae Species 0.000 description 2
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 2
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- 235000013399 edible fruits Nutrition 0.000 description 2
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- 239000004065 semiconductor Substances 0.000 description 2
- 238000012163 sequencing technique Methods 0.000 description 2
- 230000010267 cellular communication Effects 0.000 description 1
- 230000004640 cellular pathway Effects 0.000 description 1
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- 230000007246 mechanism Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000013468 resource allocation Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
- H04W52/04—Transmission power control [TPC]
- H04W52/18—TPC being performed according to specific parameters
- H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
- H04W52/242—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters taking into account path loss
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
- H04W52/04—Transmission power control [TPC]
- H04W52/18—TPC being performed according to specific parameters
- H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
- H04W52/243—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters taking into account interferences
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
- H04W52/04—Transmission power control [TPC]
- H04W52/18—TPC being performed according to specific parameters
- H04W52/28—TPC being performed according to specific parameters using user profile, e.g. mobile speed, priority or network state, e.g. standby, idle or non-transmission
- H04W52/283—Power depending on the position of the mobile
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
- H04W52/04—Transmission power control [TPC]
- H04W52/30—Transmission power control [TPC] using constraints in the total amount of available transmission power
- H04W52/36—Transmission power control [TPC] using constraints in the total amount of available transmission power with a discrete range or set of values, e.g. step size, ramping or offsets
- H04W52/367—Power values between minimum and maximum limits, e.g. dynamic range
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
- H04W52/04—Transmission power control [TPC]
- H04W52/38—TPC being performed in particular situations
- H04W52/383—TPC being performed in particular situations power control in peer-to-peer links
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
- H04W52/04—Transmission power control [TPC]
- H04W52/30—Transmission power control [TPC] using constraints in the total amount of available transmission power
- H04W52/32—TPC of broadcast or control channels
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
- Transmitters (AREA)
Abstract
Embodiments of the present invention provide a kind of method and user equipment inhibiting interference in the user equipment of transmitting terminal.This method includes obtaining maximum to use transmission power；It determines at least one D2D of the user equipment of receiving terminal and it is expected the first path loss power of link, and determine the second path loss power of at least one interfering link；Estimation transmission power is determined according to the first path loss power and the second path loss power；And it can be used in transmission power and the estimation transmission power from the maximum and select smaller power as transmission power.The transmission power of the user equipment of the method control transmitting terminal of embodiment through the invention, it not only ensure that D2D it is expected the communication quality of link, due to considering the interference of interfering link, it is expected that the transmitting terminal pair of link is multiplexed the interference of the receiving terminal of other links of same resource block with it to effectively inhibit D2D, improves the ability for inhibiting interference in D2D communications.
Description
Technical field
Embodiments of the present invention are related to the communications field, more particularly, in D2D (Device-to-Device, equipment
To equipment) in inhibit interference method and user equipment.
Background technology
D2D communications are introduced in a cellular communication system, are the research hotspots of the current communications field.D2D communications refer to two
Or more direct communication between user equipment.D2D communications have 4 kinds of use case, as shown in Figure 1, example 1 is unicast
(Unicast), it is that 2 user equipmenies are in communication with each other；Example 2 is multicast (Group-cast), and a user equipment is sent simultaneously
Information is to multiple user equipmenies in same member's group；Example 3 is broadcast (Broadcast), and a user equipment is broadcasted simultaneously
Information is to all user equipmenies in certain geographic range；Example 4 is that relaying propagates (Relay), during a user equipment is used as
After relaying base station to another or multiple user equipmenies or message that other users equipment is sent.
The introducing of D2D communications has many advantages, such as efficient radio resource utilization, higher spectrum efficiency, lower
Power consumption and community marginal user performance promotion etc..However, if D2D communications have been multiplexed the resource block of cellular network, and
And according to resource allocation strategy, it may also can be multiplexed same resource block between different D2D links, therefore, in D2D links and bee
There can be interference between the cellular link of nest network and between different D2D links.For the integrated communication matter of lifting system
Amount needs to inhibit to interfere in D2D communications.
In existing technical solution, the method for inhibiting interference in cellular network communication is continued to use, has been given in unicast
D2D communication in by control transmitting terminal user equipment transmission power carry out AF panel method.It specifically includes：It obtains
Maximum available launch power；It determines to a D2D between the user equipment of receiving terminal and it is expected the path loss power of link；Root
Estimation transmission power is determined according to determining path loss power；From maximum available launch power and estimation transmission power in selection compared with
Small power is as transmission power.
However, there are the following problems for existing technical solution：
Due to only determining that a D2D it is expected the path loss power of link, can only inhibit in the D2D of unicast communications
Interference can not it is expected that the D2D of link is communicated there are a plurality of D2D to multicast, broadcast and relaying propagation etc. and carry out AF panel so that
Existing technical solution has certain use limitation.In addition, existing technical solution only considers that D2D it is expected the path of link
Loss power controls the transmission power of the user equipment of transmitting terminal, ensure that D2D it is expected the communication quality of link, but transmitting terminal
User equipment using final choice transmission power send information when, for be multiplexed same resource block other D2D links and
Cellular link still has larger interference, and interference rejection capability is poor.
Invention content
For the technical problems in the prior art, embodiments of the present invention provide a kind of for inhibiting interference
Method and user equipment.
According to embodiment of the present invention, a kind of side inhibiting interference in the user equipment of transmitting terminal is provided
Method.This method includes：Transmission power can be used by obtaining maximum；Determine at least one device-to-device to the user equipment of receiving terminal
D2D it is expected the first path loss power of link, and determines the second path loss power of at least one interfering link；According to
The first path loss power and the second path loss power determine estimation transmission power；And it can from the maximum
Using in transmission power and the estimation transmission power selects smaller power as transmission power.
According to another implementation of the invention, a kind of equipment is provided.The equipment includes：Acquisition device, for obtaining
Take maximum that can use transmission power；First determining device, for determining at least one equipment to the user equipment of receiving terminal to setting
Standby D2D it is expected the first path loss power of link, and determines the second path loss power of at least one interfering link；The
Two determining devices, for determining that estimation sends work(according to the first path loss power and the second path loss power
Rate；And selection device, for from the maximum smaller power can be selected in transmission power and the estimation transmission power
As transmission power.
The technical solution for the inhibition interference that embodiments of the present invention provide, is suitable in unicast, multicast, broadcast and relaying
AF panel is carried out in a variety of D2D communications such as propagation.
According to the embodiment of the present invention, by D2D it is expected link first path loss power and interfering link the
Two path loss power determine estimation transmission power, so as to be selected from maximum in transmission power and estimation transmission power
Smaller power is as transmission power so that when the user equipment of transmitting terminal sends information using the transmission power of selection, not only
It ensure that D2D it is expected the communication quality of link, and the interference due to considering interfering link, to effectively inhibit the D2D phases
It hopes the transmitting terminal pair of link be multiplexed the interference of the receiving terminal of other links of same resource block with it, improves and inhibit in D2D communications
The ability of interference.
Description of the drawings
The following detailed description to non-limiting embodiment, other spies of the invention are read by referring to accompanying drawing
Sign, objects and advantages will become more apparent upon.In the accompanying drawings, identical and similar reference numeral represents same or analogous device
Or method and step, wherein：
Fig. 1 diagrammatically illustrates user's example in D2D communications；
Fig. 2 diagrammatically illustrates the various links in D2D communications；
Fig. 3 diagrammatically illustrates the inhibition interference in the user equipment of transmitting terminal according to embodiment of the present invention
Method flow chart；
Fig. 4 diagrammatically illustrates the method for realizing inhibition interference wherein according to one embodiment of the present invention
The block diagram of user equipment.
Specific implementation mode
Exemplary embodiments of the present invention provide the method and apparatus for inhibiting interference.In some embodiment party of the present invention
In formula, the power control of the user equipment for the transmitting terminal that link it is expected based on D2D is provided to inhibit to interfere.The present invention in addition
In some embodiments, the communication pattern selection of the user equipment for the transmitting terminal that link it is expected based on D2D is provided and to D2D
It is expected that the resource block of link configures to inhibit to interfere.
The application scenarios of exemplary embodiments of the present invention are：In D2D communications, D2D it is expected link use and bee
When identical with other D2D links resource block of nest link, D2D it is expected that the user equipment of the transmitting terminal of link is using the resource block
When transmitting information, the cellular link and other D2D links equally using resource block transmission information are interfered.In order to ensure
Whole network communication quality needs such inhibition interference.Although also, D2D communications can be multiplexed the uplink of cellular network
Road resource and down-chain resource, but advantageously compared to multiplexed downlink resource due to multiplexing uplink resource, example
Such as since the receiving terminal of the downlink of cellular network is the continually changing user equipment in position, it is more difficult to estimate D2D and it is expected link
The user equipment of transmitting terminal interfered caused by it, to be difficult to carry out AF panel；In another example the uplink of cellular network
The handling capacity on road is usually less than the handling capacity of downlink, communication institute of the D2D communications multiplexing uplink resource to cellular network
The influence brought is compared to smaller for downlink.Considered based on various reasons, when establishing D2D communications, usually its point
Uplink resource with cellular network.Therefore, exemplary embodiments of the present invention consider that D2D it is expected that link is multiplexed Cellular Networks
The problem of inhibiting interference when the uplink resource of network.As shown in Fig. 2, be shown D2D it is expected link, interfering link, with
And other D2D links and cellular link.
Carry out each embodiment of detailed description of the present invention below in conjunction with attached drawing.
Fig. 3 schematically shows what the inhibition in the user equipment of transmitting terminal according to embodiment of the present invention was interfered
The flow chart of method 300.This method may be implemented in any user equipment as transmitting terminal for carrying out D2D communications to inhibit
Interference.
The acquisition maximum at step S301 of method 300 can use transmission power.Wherein the user equipment of transmitting terminal is by itself
The influence of communication conditions, maximum can be changed with transmission power, it is therefore desirable to which transmission power can be used by obtaining current maximum.
Method 300 determines that at least one D2D to the user equipment of receiving terminal it is expected the first path loss of link at step S302
Power, and determine the second path loss power of at least one interfering link.Then, the basis at step S303 of method 300
The first path loss power and the second path loss power determine estimation transmission power, and at step S304
Can be used in transmission power and the estimation transmission power from the maximum selects smaller power as transmission power.It is appreciated that
, step S301 can execute before step S302, can also be executed after step S302 or S303, it is only necessary to ensure
Method 300 gets maximum before step S304 can use transmission power and estimation transmission power.
According to one embodiment of present invention, in method 300, D2D it is expected that link can be one or more, depends on
D2D used by the user equipment of transmitting terminal communicates use case.For example, in fig. 2, the user equipment of transmitting terminal is A1,
Use case is communicated using the D2D of multicast, therefore carrying out D2D communications with user equipment A3, A2 and A4 of receiving terminal there are 3
D2D it is expected link.
According to embodiment of the present invention, at least one D2D to the user equipment of receiving terminal is determined in method 300
It is expected that the first path loss power of link includes：Determine that every D2D to the user equipment of receiving terminal it is expected the first of link
Estimate path loss power；And determine that the first path is lost according to the determining first estimation path loss power
Power.
When the every D2D determined to the user equipment of receiving terminal it is expected the first estimation path loss power of link, by
Position constantly variation and the transmitting terminal of the user equipment of the receiving terminal of link and the user equipment of transmitting terminal it is expected in every D2D
The transmission power of user equipment also constantly change, every D2D it is expected the path loss power also more difficult accurate determination of chain road.
According to embodiment of the present invention, determine that every D2D it is expected the first estimation path loss power packet of link
Include processing mode (a1)：Determine that every D2D to the user equipment of receiving terminal it is expected the first estimation path loss power of link
Including：Every D2D for getting the user equipment of receiving terminal it is expected the first RSRP (Reference Signal of link
Receiving Power, Reference Signal Received Power), and determine that every D2D it is expected link according to the first RSRP
First estimation path loss power.
Wherein the first RSRP refers to that reference signal it is expected in every D2D on link after transmission, when receiving the reference signal
Reception power.It can it is expected that the user equipment of the receiving terminal of link uses predetermined transmission power (for example, maximum by every D2D
Transmission power can be used) it sends, and reference signal is received by the user equipment of transmitting terminal；It can also be adopted by the user equipment of transmitting terminal
It is sent with predetermined transmission power (for example, maximum can use transmission power), and it is expected that the user of the receiving terminal of link sets by every D2D
It is standby to receive reference signal.Every D2D it is expected that the user equipment of the receiving terminal of link can will receive the reception work(of reference signal
First RSRP is sent to the user equipment of transmitting terminal by rate as the first RSRP so that the user equipment of transmitting terminal is got
First RSRP.In one embodiment, the first RSRP can it is expected to the first estimation path of link directly as every D2D
Loss power.In another embodiment, the estimation path loss power of the first RSRP and first can also be determined by modeling
Between the functional relation that is met, obtain the first estimation path loss power to carry out functional operation according to the first RSRP.
According to another implementation of the invention, determine that every D2D it is expected the first estimation path loss power of link
Including processing mode (a2)：The first distance between the user equipment of the determining receiving terminal for it is expected link with every D2D, and root
Determine that every D2D it is expected the first estimation path loss power of link according to first distance.
Wherein the user equipment of transmitting terminal and every D2D it is expected the first distance between the user equipment of the receiving terminal of link
It can be determined using existing location technology, location technology such as GPS (Global Positioning System, global location
System) location technology, bluetooth positioning, Wi-Fi network positioning etc..Because D2D it is expected path loss and D2D phases of chain road
Hope the distance between transmitting terminal and receiving terminal of link related, therefore, the first distance can reflect that D2D it is expected the path of link
Loss power.In one embodiment, directly it directly can indicate that every D2D it is expected that the first of link estimates with the first distance
Path loss power.In another embodiment, it can also be determined by modeling and to be met between distance and path loss
Functional relation obtains the first estimation path loss power to carry out functional operation according to the first distance.
It is according to the present invention in order to more accurately determine that every D2D it is expected the first estimation path loss power of link
One embodiment determines that every D2D it is expected that the first estimation path loss power of link includes processing mode (a3)：Receive the
The first reference signal that user equipment in one geographic range is sent using the first predetermined transmission power, and determine described first
The reception power of reference signal, wherein the previously known first predetermined transmission power of the user equipment of the transmitting terminal；According to
The reception power of the first predetermined transmission power and each first reference signal, to determine the use in first geographic range
The D2D Actual path loss powers of link between family equipment and the user equipment of the transmitting terminal；And described first will be arrived
It is included at least one D2D in user equipment in geographic range and it is expected each user equipment in link and the transmission
The D2D Actual paths loss power of the user equipment at end it is expected the first estimation path loss power of link as every D2D.
Wherein in order to enable the user equipment in the first geographic range sends the first reference using the first predetermined transmission power
Signal, according to embodiment of the present invention, the user equipment of transmitting terminal are measured using the broadcast of preconfigured transmission power
Request, and the user equipment for measuring the user equipment asked and being defined as in first geographic range will be received；With
And receive first reference signal that the user equipment in first geographic range is sent using the first predetermined transmission power.
Wherein preconfigured transmission power, which can be the maximum of the user equipment of transmitting terminal, can use transmission power, in order to be able to will survey
The user equipment of the receiving terminal of link it is expected in amount request broadcast to all D2D.
For the purposes of making the user equipment in the first geographic range send the first reference using the first predetermined transmission power
Signal, according to another implementation of the invention, the user equipment of transmitting terminal receives the use in first geographic range
Make a reservation for after the measurement request that the base station of family equipment cell residing for the user equipment for receiving the transmitting terminal is sent, using first
First reference signal that transmission power is sent；Wherein, the base station of cell residing for the user equipment of the transmitting terminal has been in advance
Know the geographical location of the user equipment in first geographic range.The base of cell residing for the user equipment of the wherein described transmitting terminal
It stands and is sending measurement request, transmission power can be determined according to the size of previously known geographic range, to accomplish accurately
The user equipment for asking to be sent in preset geographic range will be measured.
And in such an embodiment, according to the difference of the user equipment present position in the first geographic range, hair
It is also different that the base station of cell residing for the user equipment of sending end sends the mode for measuring and asking.A thus implementation according to the present invention
Mode receives the base of user equipment cell residing for the user equipment for receiving the transmitting terminal in first geographic range
First reference signal stand after the measurement request sent, sent using the first predetermined transmission power includes：Described first
When user equipment in geographic range is respectively positioned in the cell residing for the user equipment of the transmitting terminal, it is geographical to receive described first
The user equipment measurement that the base station of cell directly transmits residing for the user equipment for receiving transmitting terminal request in range
Afterwards, first reference signal sent using the first predetermined transmission power；User equipment in first geographic range
When not being respectively positioned in the cell residing for the user equipment of the transmitting terminal, the user equipment in first geographic range is received
In be located at the transmitting terminal residing for cell in user equipment cell residing for the user equipment for receiving the transmitting terminal
After the measurement request that base station directly transmits, first reference signal that is sent using the first predetermined transmission power, and receive
Other users equipment in user equipment in first geographic range other than positioned at the cell residing for the transmitting terminal is connecing
The base station for receiving cell residing for the user equipment first by the transmitting terminal is sent to the base station of predetermined neighboring community, again by described
Believe after the measurement request of the base station forwarding of predetermined neighboring community, using first reference that the first predetermined transmission power is sent
Number.Wherein predetermined neighboring community refer in the user equipment in the first geographic range in addition to be located at cell residing for the transmitting terminal it
Cell residing for outer other users equipment.
According to embodiment of the present invention, in above-mentioned processing mode (a3) according to the described first predetermined transmission power and
The reception power of each first reference signal, to determine the use of user equipment and the transmitting terminal in first geographic range
The D2D Actual path loss powers of link between the equipment of family.In one embodiment, the first predetermined transmission power can be used
With each first reference signal reception power difference as in first geographic range user equipment and the transmission
The D2D Actual path loss powers of link between the user equipment at end.User equipment in wherein each first geographic range
The the first predetermined transmission power used can be not exactly the same, and the user equipment of transmitting terminal can distinguish each first ground in advance
Manage the first predetermined transmission power used by the user equipment in range.
In above-mentioned processing mode (a3), it is recognised that the user equipment in the first geographic range, which includes D2D, it is expected link
Receiving terminal user equipment, and also previously known D2D it is expected that the user of the receiving terminal of link sets to the user equipment of transmitting terminal
It is standby, therefore, each use in link can will it is expected to being included at least one D2D in the user equipment in the first geographic range
The D2D Actual path loss powers of the user equipment of family equipment and transmitting terminal it is expected the first estimation road of link as every D2D
Diameter loss power.Here, since D2D Actual path loss powers are it is expected the transmission work(on chain road in D2D according to reference signal
What rate and reception power determined, more accurately represent the path loss that D2D it is expected chain road.Thus D2D Actual paths are damaged
After wasted work rate it is expected the first estimation path loss power of link as every D2D, the first estimation path loss power will more
Precisely.
According to embodiment of the present invention, determine that every D2D it is expected the first estimation path loss power packet of link
Include processing mode (a4)：Second reference signal is sent using the second predetermined transmission power, and determines and receives second ginseng
Examine the reception power of the user equipment of signal；Described second is received according to the described second predetermined transmission power and each with reference to letter
Number user equipment reception power, to determine the user equipment for each receiving second reference signal and the transmission
The D2D Actual path loss powers of link between the user equipment at end；And the use that second reference signal will be received
The user equipment of each user equipment and the transmitting terminal in the equipment of family, that link it is expected included at least one D2D
Between the D2D Actual paths loss power of link the first estimation path loss power of link it is expected as every D2D.
In processing mode (a4), reference signal is sent by the user equipment of transmitting terminal, the user equipment of transmitting terminal can be with
The size of the second predetermined transmission power is controlled to which the user equipment controlled in certain geographic range can receive the second reference
The user equipment of signal.In alternative embodiments, maximum, which may be used, in the user equipment of transmitting terminal to send the with power
Two reference signals.
After the user equipment of transmitting terminal sends the second reference signal, the user for receiving the second reference signal sets
The standby reception power that can determine the second reference signal.According to embodiment of the present invention, the second reference signal is received
User equipment the reception power of the second reference signal is transmitted directly to the user equipment of transmitting terminal, or be sent to residing for it
The base station of cell is sent to the user equipment of transmitting terminal by the base station of its residing cell.The user equipment of transmitting terminal is receiving
After the reception power of second reference signal, D2D Actual path loss powers are calculated accordingly.Another embodiment party according to the present invention
Formula receives the previously known second predetermined transmission power of user equipment of the second reference signal, so as to predetermined according to second
The reception power of transmission power and the second reference signal determines D2D Actual path loss powers, and by determining D2D Actual paths
Loss is transmitted directly to the user equipment of transmitting terminal, or is sent to the base station of the cell residing for it, will be true by the base station of cell
Fixed D2D Actual paths loss is sent to the user equipment of transmitting terminal.Wherein if the user for receiving the second reference signal sets
The base station of standby residing cell is different from the base station of cell residing for the user equipment of transmitting terminal, then receives the use of the second reference signal
The user equipment that the base station of cell residing for the equipment of family will need the information for the user equipment for being sent to transmitting terminal to be sent to transmitting terminal
The base station of the base station of residing cell, cell residing for the user equipment by transmitting terminal relays to the user equipment of transmitting terminal.
In above-mentioned processing mode (a4), it is expected it is recognised that the user equipment for receiving the second reference signal includes D2D
The user equipment of the receiving terminal of link, and the user equipment of transmitting terminal also previously known D2D it is expected link receiving terminal use
Therefore family equipment can it is expected at least one D2D is included in the user equipment for receiving the second reference signal in link
The D2D Actual paths loss power of the user equipment of each user equipment and transmitting terminal it is expected the first of link as every D2D
Estimate path loss power.In above-mentioned processing mode (4), since D2D Actual path loss powers are existed according to reference signal
D2D it is expected the transmission power of chain road and receives what power determined, more accurately represents the path damage that D2D it is expected chain road
Consumption.After the first estimation path loss power for thus it is expected link using D2D Actual paths loss power as every D2D, first
Estimating path loss power will be more accurate.
It can determine that every D2D it is expected the first estimation path loss power of link according to above-mentioned embodiment, the
One estimation path loss power reflects that every D2D it is expected the communication conditions of link.Determine that the user of transmitting terminal sets in method 300
When standby transmission power, the AF panel for weighing communication quality and interfering link that D2D it is expected link is needed.Therefore, it is possible to root
First path loss power is determined according to the first determining estimation path loss power, with first path loss power to reflect
There is D2D it is expected the communication conditions of link.
According to embodiment of the present invention, first path is determined according to the first determining estimation path loss power
Loss power includes processing mode (b1)：By maximum first estimation path in determining the first estimation path loss power
Loss power is determined as the first path loss power.
It is, for example, possible to use following formula determines the maximum value in the first estimation path loss power：
WhereinIndicate the linear value of first path loss power；K indicates that D2D it is expected the quantity of link；Indicate that the 1st article to the K articles D2D it is expected the linear value of the first estimation path loss power of link.
According to another implementation of the invention, the first via is determined according to the first determining estimation path loss power
Diameter loss power includes processing mode (b2)：The harmonic-mean of determining the first estimation path loss power is calculated, and
And using the harmonic-mean being calculated as the first path loss power.
It is, for example, possible to use following formula calculates harmonic-mean：
WhereinIndicate the linear value of first path loss power；K indicates that D2D it is expected the quantity of link；Indicate that the 1st article to the K articles D2D it is expected the linear value of the first estimation path loss power of link.
Another embodiment according to the present invention determines the first via according to the first determining estimation path loss power
Diameter loss power includes processing mode (b3)：The linear combination for calculating determining the first estimation path loss power is average
Value, and using the linear combination average value being calculated as the first path loss power.
It is, for example, possible to use following formula calculates linear combination average value：
WhereinIndicate the linear value of first path loss power；K indicates that D2D it is expected the quantity of link；Indicate that the 1st article to the K articles D2D it is expected the linear value of the first estimation path loss power of link；
ω1,...,ωKThe weight of link, and ω it is expected for corresponding D2D1+...+ωK=1.
The first path loss power that wherein (b1) is determined ensures the link that D2D it is expected that communication quality is worst in link
Communication；(b2) the first path loss power determined has coordinated the communication quality that all D2D it is expected link；(b3) it is based on not
The weight of link it is expected with D2D to ensure that different D2D it is expected the communication quality of link.For example, can be with higher-priority
D2D it is expected that link distributes higher weight, and so on.
Those skilled in the art are it is appreciated that calculating harmonic-mean and when linear average, in order to count
The accuracy of calculation needs the line that the first estimation path loss power of link it is expected using every D2D in one embodiment
Property value is calculated, the linear value that the first obtained interference path loss power is also.Estimation is determined at subsequent step S303
When transmission power, logarithm can be taken to the linear value of the first interference path loss power, obtain the logarithmic table of common power
Up to form (for example, as unit of dB).However, in some embodiments, processing mode (b1) is estimated in selection maximum first
When path loss power, it is not limited to be selected with the linear value of the first estimation path loss power or logarithm.
It is understood that above-mentioned determine first path loss power according to the first determining estimation path loss power
Processing be only exemplary with it is illustrative.Embodiments of the present invention are not limited to specific processing side disclosed herein
Formula.Those skilled in the art can take other suitable (existing or future exploitation) methods according to the introduction of this specification
Determine first path loss power.
Method 300 is at step S302 in addition to determining that at least one D2D to the user equipment of receiving terminal it is expected link
Except first path loss power, it is also necessary to determine the second path loss power of at least one interfering link.It is appreciated that
It is that the first path loss power for it is expected link is determined at least one D2D of the user equipment of receiving terminal at step S302
With determine at least one interfering link the second path loss power in no particular order sequence, may be performed simultaneously or according to any elder generation
Sequence executes afterwards.
In the second path loss power for determining at least one interfering link, wherein interfering link refers to that D2D it is expected chain
The user equipment of the transmitting terminal on road makes other users equipment or base station when sending information to the receiving terminal of D2D expectation links
At the link of interference.The interfering link includes by it is expected that link is connect using other D2D links of same resource block with the D2D
The D2D interfering links of the user equipment of receiving end and transmitting terminal composition, and/or it is identical by it is expected that link uses with the D2D
The honeycomb interfering link of the user equipment of the receiving terminal of the cellular link of resource block and transmitting terminal composition.In showing for the present invention
In example property embodiment, the case where D2D it is expected the uplink resource of link multiplexing cellular network is considered, it is therefore, dry for D2D
Link is disturbed, the user equipment that object is the receiving terminal for receiving information in the D2D interfering links is disturbed；Chain is interfered for honeycomb
Road, it is the base station that up-link information is received in cellular link to be disturbed object.D2D interfering links that interfering link includes and
The quantity of honeycomb interfering link is determined by the distribution condition of actual uplink resource.For example, in fig. 2, due to transmitting terminal
User equipment A1 using resource block identical with other D2D links and cellular link send information, to formed interference chain
Road.D2D interfering links have 2：A1 to B1, A1 are to C1；Honeycomb interfering link has 3：A1 to S1, A1 are to S3, A1 to S5.
Since the object that the path loss of D2D interfering links with honeycomb interfering link is disturbed is different, can determine respectively
Path loss power on different types of interfering link.According to embodiment of the present invention, at least one interference is determined
Second path loss power of link includes：Determine the first interference path loss power of the D2D interfering links, and/or really
Second interference path loss power of the fixed honeycomb interfering link；According to the first interference path loss power and/or institute
The second interference path loss power is stated to determine the second path loss power.
It wherein determines the first interference path loss power of D2D interfering links and determines the second interference of honeycomb interfering link
The processing also not difference of sequencing of path loss power, can be carried out at the same time, can also according to any sequencing into
Row.
According to embodiment of the present invention, the first interference path loss power packet of the D2D interfering links is determined
It includes：Determine the second estimation path loss power of every D2D interfering link；And according to determining second estimation path damage
Wasted work rate determines the first interference path loss power.
It is the link formed between two user equipmenies, therefore since D2D interfering links and D2D it is expected that link is similar
Determine the second estimation path loss power of every D2D interfering link and the first estimation path for determining that every D2D it is expected link
Loss power is similar.
According to embodiment of the present invention, the second estimation path loss power of every D2D interfering link is determined
Including processing mode (c1)：The 2nd RSRP on every D2D interfering link is obtained, and is determined often according to the 2nd RSRP
Second estimation path loss power of D2D interfering links.
According to another implementation of the invention, the second estimation path loss power of every D2D interfering link is determined
Include processing mode (c2)：The determining second distance between the user equipment of the receiving terminal of every D2D interfering link, and
The second estimation path loss power of every D2D interfering link is determined according to the second distance.
It can be seen that above-mentioned processing mode (c1) and (c2) it is expected the first estimation road of link with every D2D of determination respectively
The processing mode (a1) of diameter loss power is similar with (a2), and details are not described herein.Also, in order to more accurately determine every
D2D it is expected the second estimation path loss power of link, and the first estimation path loss power of link it is expected with every D2D of determination
Processing mode it is similar, the present invention also provides following some embodiments.
According to another implementation of the invention, the second estimation path loss power of every D2D interfering link is determined
Include processing mode (c3)：Receive the user equipment in the first geographic range is sent using the first predetermined transmission power first
Reference signal, and determine the reception power of first reference signal, wherein the user equipment of the transmitting terminal is previously known
The first predetermined transmission power；According to the reception power of the described first predetermined transmission power and each first reference signal, come
Determine the D2D Actual paths of the user equipment in first geographic range and the link between the user equipment of the transmitting terminal
Loss power；Except included at least one D2D expectation links in user equipment in wherein described first geographic range
The user equipment of other users equipment and the transmitting terminal except user equipment forms D2D interfering links；And by every D2D
The D2D Actual path loss powers of interfering link are determined as the second estimation path loss power of every D2D interfering link.
Wherein above-mentioned processing mode (c3) and the processing mode for determining that every D2D it is expected the first estimation path loss of link
(a3) similar, specific implementation may refer to above-mentioned processing mode (a3).But in above-mentioned processing mode (c3), the first ground
Manage the other users equipment in the user equipment in range other than it is expected the user equipment of link included in D2D be can be by
D2D it is expected the user equipment of the user equipment interference of the transmitting terminal of link, and therefore, the user of these user equipmenies and transmitting terminal sets
Predetermined D2D Actual paths loss power is estimated road by standby composition D2D interfering links
Diameter is lost.
Another embodiment according to the present invention determines the second estimation path loss power of every D2D interfering link
Include processing mode (c4)：Second reference signal is sent using the second predetermined transmission power, and determines and receives described the
The reception power of the user equipment of two reference signals；Receive according to the described second predetermined transmission power and each second ginseng
The reception power for examining the user equipment of signal each receives the user equipment of second reference signal and described to determine
The D2D Actual path loss powers of link between the user equipment of transmitting terminal；Wherein receive second reference signal
Other users equipment in addition to the user equipment for it is expected link included at least one D2D and the hair in user equipment
The D2D interfering links of the user equipment composition of sending end；And it is the D2D Actual path loss powers of every D2D interfering link is true
It is set to the second estimation path loss power of every D2D interfering link.
Wherein above-mentioned processing mode (c4) and the processing mode for determining that every D2D it is expected the first estimation path loss of link
(a4) similar, specific implementation may refer to above-mentioned processing mode (a4).But in above-mentioned processing mode (c4), receive
Other users equipment in the user equipment of second reference signal other than it is expected the user equipment of link included in D2D
For the user equipment that can be interfered by the user equipment of the transmitting terminal of D2D expectation links, therefore, these user equipmenies and transmitting terminal
User equipment form D2D interfering links, using predetermined D2D Actual paths loss power as the of D2D interfering links
Two estimation path losses.
Because in above-mentioned processing mode (c3) and (c4), be according to reference signal when being transmitted on D2D interfering links
The second estimation path loss power that transmission power and the difference for receiving power obtain, according to above-mentioned processing mode (c3) and (c4)
The the second estimation path loss power determined compares the second estimation path obtained according to above-mentioned processing mode (c1) and (c2)
It is more acurrate for loss power.
The second estimation path loss power of every D2D interfering link can be determined according to above-mentioned embodiment, the
Two estimation path loss power reflect the disturbance regime of every D2D interfering link.Determine that the user of transmitting terminal sets in method 300
When standby transmission power, the AF panel for weighing communication quality and interfering link that D2D it is expected link is needed.Therefore, it is possible to root
The first interference path loss power is determined according to the second determining estimation path loss power, with the first interference path loss power
To reflect the disturbance regime of all D2D interfering links.
According to embodiment of the present invention, the first interference is determined according to the second determining estimation path loss power
Path loss power includes processing mode (d1)：By the second estimation minimum in determining the second estimation path loss power
Path loss power is determined as the first interference path loss power.
For example, the minimum value in the first interference path loss power can be determined with following formula：
WhereinIndicate the linear value of the first interference path loss power；M indicates the quantity of D2D interfering links；Indicate the linear value of the second estimation path loss power of the 1st article to the M articles D2D interfering link.
According to embodiment of the present invention, the first interference is determined according to the second determining estimation path loss power
Path loss power includes processing mode (d2)：The harmonic-mean of determining the second estimation path loss power is calculated,
And using the harmonic-mean being calculated as the first interference path loss power.
It is, for example, possible to use following formula calculates harmonic-mean：
WhereinIndicate the linear value of the first interference path loss power；M indicates the quantity of D2D interfering links；Indicate the linear value of the second estimation path loss power of the 1st article to the M articles D2D interfering link.
According to another implementation of the invention, determine that first is dry according to the second determining estimation path loss power
It includes processing mode (d3) to disturb path loss power：The linear combination for calculating determining the second estimation path loss power is flat
Mean value, and using the linear combination average value being calculated as the first interference path loss power.
It is, for example, possible to use following formula calculates linear combination average value：
WhereinIndicate the linear value of the first interference path loss power；M indicates the quantity of D2D interfering links；Indicate the linear value of the second estimation path loss power of the 1st article to the M articles D2D interfering link；
ω1,...,ωMFor the weight of corresponding D2D interfering links, and ω1+...+ωM=1.
The first interference path loss power that wherein (d1) is determined is to inhibit to be disturbed maximum in D2D interfering links
Chain road interference；(d2) the first interference path loss power determined is to coordinate to inhibit all D2D interfering links
On interference；(d3) inhibit the interference on all D2D interfering links based on the weight of different D2D interfering links.For example, can be with
Higher weight is distributed for the interfering link with relatively low interference endurance, and so on.
Those skilled in the art are it is appreciated that calculating harmonic-mean and when linear average, in order to count
The accuracy of calculation needs the line of the second estimation path loss power using every D2D interfering link in one embodiment
Property value is calculated, the linear value that the first obtained interference path loss power is also.The second path loss work(is determined follow-up
When rate, logarithm can be taken to the linear value of the first interference path loss power, obtain the logarithm expression-form of common power
(for example, as unit of dB).However, in some embodiments, processing mode (d1) is estimated path in selection maximum second and is damaged
When wasted work rate, it is not limited to be selected with the linear value of the second estimation path loss power or logarithm.
It is understood that above-mentioned determine that the first interference path is lost according to the second determining estimation path loss power
The processing of power be only exemplary with it is illustrative.Embodiments of the present invention are not limited to specific place disclosed herein
Reason mode.Those skilled in the art can take other suitable (existing or future exploitations) according to the introduction of this specification
Method determines the first interference path loss power.
Above describe the processing modes for the first interference path loss for determining D2D interfering links, next will introduce true
Determine the processing mode of the second interference path loss of honeycomb interfering link.According to embodiment of the present invention, honeycomb is determined
Second interference path loss power of interfering link includes：Determine the honeycomb Actual path loss work(of every honeycomb interfering link
Rate；And the second interference path loss power is determined according to the determining honeycomb Actual path loss power.
When the user equipment of the previously mentioned transmitting terminal in consideration D2D expectation links interferes cellular link, by dry
It is the base station in cellular link to disturb object, which can be macro base station or micro-base station, be determined by the actual disposition of cellular network.
Due to the usual fixation in the position of base station and transmission power is also usually fixed, can relatively accurately determine by base station and hair
The honeycomb Actual path loss power of every honeycomb interfering link of the user equipment composition of sending end.
According to embodiment of the present invention, the honeycomb Actual path loss power packet of every honeycomb interfering link is determined
Include processing mode (e)：Receive the third reference that the receiving terminal of every honeycomb interfering link is sent using the predetermined transmission power of third
Signal, wherein the previously known predetermined transmission power of third of the user equipment of the transmitting terminal；Determine described the received
The reception power of three reference signals；And it is predetermined according to the reception power of the third reference signal received and the third
Transmission power determines the honeycomb Actual path loss power of every honeycomb interfering link.
Since the user equipment of transmitting terminal can obtain the transmission power of third reference signal and receive power, so as to
Honeycomb Actual path loss power is determined according to the predetermined transmission power of the third of third reference signal and the difference for receiving power.Its
In every honeycomb interfering link receiving terminal used by the predetermined transmission power of third can be different, D2D it is expected the transmission of link
The user equipment at end can distinguish the predetermined transmission power of third of different honeycomb interfering links in advance, may thereby determine that out
The honeycomb Actual path loss power of every honeycomb interfering link.
The honeycomb Actual path loss power of every honeycomb interference path, bee can be determined according to above-mentioned embodiment
Nest Actual path loss power reflects the disturbance regime of every honeycomb interfering link.The user of transmitting terminal is determined in method 300
When the transmission power of equipment, the AF panel for weighing communication quality and interfering link that D2D it is expected link is needed.Therefore, it is possible to
The second interference path loss power is determined according to determining honeycomb Actual path loss power, and work(is lost with the second interference path
Rate reflects the disturbance regime of all honeycomb interfering links.It is recognised that the second interference path loss power reflects that honeycomb is dry
Disturb the disturbance regime of link.
Since honeycomb interfering link and D2D interfering links are interfering link, it is lost according to determining honeycomb Actual path
Power come determine the foundation of the second interference path loss power with according to the second estimation path loss work(for determining D2D interfering links
Rate is similar to determine the foundation of the first interference path.
According to embodiment of the present invention, the second interference is determined according to determining honeycomb Actual path loss power
Path loss power includes processing mode (f1)：Honeycomb minimum in the determining honeycomb Actual path loss power is practical
Path loss power is determined as the second interference path loss power.
For example, the minimum value in the second interference path loss power can be determined with following formula：
WhereinIndicate the linear value of the first interference path loss power；N indicates the quantity of D2D interfering links；Indicate the linear value of the honeycomb Actual path loss power of the 1st article to the N articles honeycomb interfering link.
According to another implementation of the invention, determine that second is dry according to determining honeycomb Actual path loss power
It includes processing mode (f2) to disturb path loss power：Calculate the harmonic average of the determining honeycomb Actual path loss power
Value, and using the harmonic-mean being calculated as the second interference path loss power.
It is, for example, possible to use following formula calculates harmonic-mean：
WhereinIndicate the linear value of the first interference path loss power；N indicates the quantity of D2D interfering links；Indicate the linear value of the honeycomb Actual path loss power of the 1st article to the N articles honeycomb interfering link.
Another embodiment according to the present invention determines that second is dry according to determining honeycomb Actual path loss power
It includes processing mode (f3) to disturb path loss power：The linear combination for calculating the determining honeycomb Actual path loss power is flat
Mean value, and using the linear combination average value being calculated as the second interference path loss power.
It is, for example, possible to use following formula calculates linear combination average value：
WhereinIndicate the linear value of the first interference path loss power；N indicates the quantity of D2D interfering links；Indicate the linear value of the honeycomb Actual path loss power of the 1st article to the N articles honeycomb interfering link；
ω1,...,ωNFor the weight of corresponding honeycomb interfering link, and ω1+...+ωN=1
The second interference path loss power that wherein (f1) is determined is to inhibit to be disturbed most in honeycomb interfering link
The interference of big chain road；(f2) the second interference path loss power determined is to coordinate to inhibit all honeycombs to interfere chain
The interference of road；(f3) inhibit the interference on all honeycomb interfering links based on the weight of different honeycomb interfering links.For example,
Can be that the interfering link with relatively low interference endurance distributes higher weight, and so on.
Those skilled in the art are it is appreciated that calculating harmonic-mean and when linear average, in order to count
The accuracy of calculation needs the honeycomb Actual path loss power for utilizing every honeycomb interfering link in one embodiment
Linear value is calculated, the linear value that the second obtained interference path loss power is also.The second path loss is determined follow-up
When power, logarithm can be taken to the linear value of the second interference path loss power, obtain the logarithm expression-form of common power
(for example, as unit of dB).However, in some embodiments, processing mode (f1) is in the maximum honeycomb Actual path damage of selection
When wasted work rate, it is not limited to be selected with the linear value of honeycomb Actual path loss power or logarithm.
It is understood that above-mentioned determine the second interference path loss power according to determining cellular pathway loss power
Processing be only exemplary with it is illustrative.Embodiments of the present invention are not limited to specific processing side disclosed herein
Formula.Those skilled in the art can take other suitable (existing or future exploitation) methods according to the introduction of this specification
Determine the second interference path loss power.
It is lost in the second interference path of the loss of the first interference path and honeycomb interfering link of determining D2D interfering links
Later, the second path loss power of interfering link can be determined therefrom that.It according to embodiment of the present invention, can be by
One interference path is lost and the second interference path loss directly adduction obtains the second path loss power.It is according to the present invention another
Both a embodiment can be that the weight different with the second interference path Loss allocation is lost in the first interference path, calculate
Linear combination average value as the second path loss power.
Method 300 proceeds to step S303 after step S302.At step S303, damaged according to the first path
Wasted work rate and the second path loss power determine estimation transmission power.It according to embodiment of the present invention, can be with
First path loss power and the second path loss power directly adduction are obtained into estimation transmission power.Optionally, according to this hair
Bright another embodiment is first path loss power and the different weight of the second path loss power distribution, calculates
The linear combination average value of the two is as estimation transmission power.
Optionally, in the other embodiment of the present invention, it is also contemplated that systematic parameter, according to the first via
Diameter loss power and the second path loss power include to determine estimation transmission power：Work(is lost according to the first path
Rate, the second path loss power and systematic parameter determine the estimation transmission power.The wherein described systematic parameter packet
Include following one or more：Scheduled open Loop Power control parameter, the D2D it is expected the allocated resource block quantity in chain road,
The compensation of transformat and scheduled close-loop power control parameter.These systematic parameters are pre-configured in system or can obtain
.In one embodiment, following exemplary formula can be used to determine estimation transmission power：
Wherein PEstimatedIndicate estimation transmission power, P0Indicate scheduled open Loop Power control parameter；It indicates
First path loss power；Indicate the first interference path loss power,Indicate that the second interference path is damaged
Wasted work rate,It is whole to indicate the second interference path loss power；R indicates that D2D it is expected that chain road has been divided
The resource block quantity matched；ΔTFIndicate the compensation of transformat；F (Δ) indicates scheduled close-loop power control parameter；α、
β, λ, μ indicate scheduled parameter.
In one embodiment,It can be the linear value in above-mentioned formula (1) to (3)
DB values,It can be linear value in above-mentioned formula (4) to (6)DB values,It can be with
For the linear value in above-mentioned formula (7) to (9)DB values.
It is understood that above-mentioned formula is only the exemplary and unrestricted mode for calculating estimation transmission power, this
The embodiment of invention is not limited to specific formula disclosed herein.Those skilled in the art according to the introduction of this specification,
Other suitable (existing or future exploitation) methods can be taken to come according to first path loss power and the second path loss
Power determines estimation transmission power.
Then, method 300 proceeds to step S304.At step S304, transmission power and described can be used from the maximum
Select smaller power as transmission power in estimation transmission power.D2D has been weighed due to estimation transmission power and it is expected link
The disturbed condition of communication quality and interfering link, therefore, if estimation transmission power can use transmission power less than maximum, selection
Estimation transmission power will effectively inhibit the interference generated in D2D communications as transmission power, while also ensure the D2D phases
Hope the communication quality of link.Certainly, it if estimation transmission power is more than maximum and can use transmission power, should select maximum available
Transmission power is as transmission power, to reach the mesh that tradeoff D2D it is expected the communication quality of link and the AF panel of interfering link
's.
The above method 300 inhibits to interfere by the transmission power of the user equipment of control transmitting terminal, this is one kind in D2D
Inhibit the method for interference in communication process in real time.It is understood that the above method 300 can be used for communicating in any D2D
In the user equipment of Shi Zuowei transmitting terminals.
However, when inhibiting interference using method 300, illustrate to have existed in system and disturb, if on interfering link
Interference it is excessive, interference may also can not be effectively inhibited using method 300.Therefore, further, embodiments of the present invention
Give some methods for inhibiting interference perspectively before interference generates.
According to embodiment of the present invention, before method 300, the transmitting terminal user equipment and described connect
When each user equipment in the user equipment of receiving end is satisfied by D2D communication conditions, established with the user equipment of the receiving terminal
The D2D it is expected link.In this embodiment, by first considering that D2D it is expected the hair of link before D2D it is expected link establishment
Whether the user equipment of sending end and receiving terminal meets certain D2D communication conditions, these D2D communication conditions can constrain well
It is expected not will produce excessive interference after link establishment in D2D, i.e., perspective the method interfered is inhibited to use as a kind of.
Wherein when using multicast, broadcast or relaying relay etc., there are user's examples that a plurality of D2D it is expected link, it is difficult to provide
Criterion appropriate determines that a plurality of D2D it is expected that link can be established.Therefore, in an exemplary embodiment of the present invention embodiment,
Consider the case where D2D it is expected the case where link is one, i.e. one-to-one unicast D2D communications.The user equipment of the transmitting terminal
It needs to meet one in following D2D communication conditions (g1) to (g6) with each user equipment in the user equipment of the receiving terminal
A or multiple combination：
(g1) D2D it is expected the 3rd RSRP of link be more than or equal to each user equipment and its residing cell base station it
Between link the 4th RSRP.
Its conditional (g1) is considered it is expected the communication quality on chain road in D2D, when the 3rd RSRP is more than or equal to each use
When four RSRP of the link between family equipment and the base station of its residing cell, illustrate that each user equipment it is expected link in D2D
On communication quality better than each user equipment and its residing cell base station communication quality, therefore D2D expectations can be established
Link.
(g2) the 3rd RSRP of the first predetermined ratio is more than or equal to each user equipment and it is expected link with the D2D
Use the 5th RSRP of the link between the receiving terminal of the cellular link of same resource block.
Its conditional (g2) considers each user equipment and is interfered the disturbed condition of link.It is considered herein that interfering link
It is expected that link uses the link between the transmitting terminal of the cellular link of same resource block for each user equipment and the D2D.Such as
3rd RSRP of the first predetermined ratio of fruit is more than or equal to fiveth RSRP of each user equipment on interfering link, illustrates to interfere chain
The interference of road in allowed limits, then can establish D2D and it is expected link.
(g3) the 6th RSRP of the second predetermined ratio be more than or equal to the 4th RSRP, wherein the 6th RSRP for institute
State the RSRP that D2D it is expected link using the cellular link of same resource block.
Its conditional (g3) considers the communication quality of the cellular link in cellular network.The D2D of foundation it is expected in link
Each user equipment excessive interference should not be caused to the communication quality of cellular link to the interference of the receiving terminal of cellular link.The
Six RSRP indicate the communication quality of cellular link, if the 6th RSRP of the second predetermined ratio is more than the 4th RSRP, illustrate to establish
D2D it is expected link pair cellular link interference in allowed limits, then can establish D2D it is expected link.
(g4) CQI (Channel of each link between user equipment and the base station of its residing cell in scheduled duration
Quality Indicator, channel quality indicator) it is less than the first predetermined threshold value.
Its conditional (g4) considers in scheduled duration, and each user equipment is between the base station of its residing cell
The CQI of link illustrates if CQI is more than or equal to the first predetermined threshold value between each user equipment and the base station of its residing cell
Link communication quality it is preferable, then be not necessarily to establish D2D and it is expected link, because establishing when D2D it is expected link to inhibit to interfere
It also needs to carry out the power control such as method 300 and resource distribution presented below.If CQI is less than the first predetermined threshold value,
D2D can then be established and it is expected link.
(g5) D2D it is expected that the quantity of the resource block of chain road distribution is less than the second predetermined threshold.
Its conditional (g5) considers D2D and it is expected that chain needs the quantity of the resource block distributed on the road.If D2D it is expected link
The quantity of the upper resource block for needing to distribute is more than or equal to the second predetermined threshold, then is not necessarily to establish D2D expectation links.If the D2D phases
It hopes the quantity of the resource block of chain road distribution be less than the second predetermined threshold, then can establish D2D and it is expected link.
(g6) it establishes the D2D and it is expected that the total frequency spectrum utilization rate after link it is expected link more than or equal to the D2D is established
Total frequency spectrum utilization rate before.
Its conditional (g2) considers the total frequency spectrum utilization rate established before and after D2D expectation links, if establishing D2D it is expected chain
Total frequency spectrum utilization rate improves behind road, then can establish D2D and it is expected link.In one embodiment, the tool of total frequency spectrum utilization rate
Body method of determination can refer to formula (10) discussed more fully below or (11).
It in some embodiments, can be in the user equipment of transmitting terminal and each of the user equipment of the receiving terminal
When user equipment needs to meet the either condition of D2D communication conditions (g1) to (g6), establishes D2D and it is expected link.In other
In embodiment, it can be needed in each user equipment in the user equipment of the user equipment of transmitting terminal and the receiving terminal
When meeting the arbitrary combination of multiple conditions of D2D communication conditions (g1) to (g6), establishes D2D and it is expected link.
According to embodiment of the present invention, before method 300, and it is above-mentioned establish D2D it is expected link after,
The D2D for foundation is needed it is expected that link distributes resource block.It is recognised that if D2D it is expected the resource block that chain road is distributed and its
His more D2D links or cellular link share, then are interfered in system bigger.Therefore, it in order to effectively inhibit interference, examines simultaneously
Consider the utilization rate of resource block, according to embodiment of the present invention, the method for providing following distribution resource block：It is determining most
Before transmission power available greatly, for any resource block, when second and rate are more than or equal to first and rate, by the resource
Block distributes to the D2D and it is expected link.
Wherein described first and rate be in the resource block to be assigned to other D2D links and cellular link without quilt
When distributing to the D2D and it is expected link, other described D2D links and the cellular link and rate；Described second and rate
For when the resource block is assigned to other described D2D links and the cellular link, the resource block is reallocated to institute
It states D2D and it is expected other described D2D links, the cellular link and the D2D in the case of link it is expected link and rate.
It is neutralized rate (sum data rate) and can be calculated based on the Signal to Interference plus Noise Ratio on D2D links, cellular link.
But since second and rate are estimated under such circumstances and rate before resource block to be distributed to D2D and it is expected link
It surveys.Since the resource block is not yet really assigned to D2D expectation links at this time, it is unable to get actual Signal to Interference plus Noise Ratio.Therefore, according to
An embodiment of the invention, described first and rate be according to every in described other D2D links and the cellular link
The RSRP of the link and its RSRP on interfering link is determined and rate；Described second and rate be according to other described D2D
Link, the cellular link and the D2D it is expected what the RSRP of each of the links in link and its RSRP of interfering link were determined
And rate.Wherein, the RSRP of each of the links can be used as signal reception power, and the summation of the RSRP on interfering link, which is used as, makes an uproar
Sound reception power, to estimate out second and rate.In another embodiment, noise Rx power can also include Gauss white noise
The reception power of sound.
In an exemplary embodiment of the present invention embodiment, the more difficult determination of the case where link it is expected for a plurality of D2D and rate, because
This is it is considered herein that D2D it is expected the case where link is one.In one embodiment, first and rate and second and rate can be with
It is calculated using following formula：
Wherein formula (10) is for calculating first and rate, and formula (11) is for calculating second and rate.Rbefore1It indicates
First and rate；Rafter2Indicate second and rate；Before P indicates resource block distributing to D2D expectation links, it is assigned this
The quantity of other D2D links and cellular link of resource block；P+1 is indicated after the resource block is distributed to D2D expectation links, has been divided
Other D2D links, cellular link and D2D equipped with the resource block it is expected the quantity of link；RSRPkIndicate that k-th of receiving terminal exists
The RSRP for it is expected D2D chains road of its own；RSRPi,kIt indicates between k-th of receiving terminal and i-th of transmitting terminal of interfering link
Chain road RSRP, i be not equal to k；N0Indicate white Gaussian noise.
It is understood that above-mentioned formula is only exemplary and unrestricted calculates first and rate and second and rate
Mode, embodiments of the present invention are not limited to specific formula disclosed herein.Those skilled in the art are according to this explanation
The introduction of book can take other suitable (existing or future exploitation) methods to calculate first and rate and second and speed
Rate.
After determining first and rate and second and rate, judge first and rate and second and rate size, such as
Fruit second and rate are more than first and rate, illustrate after the resource block is distributed to D2D expectation links, can improve system
And rate, then the resource block can be distributed to D2D and it is expected link.
Fig. 4 schematically shows the use for realizing the method for inhibiting interference wherein according to one embodiment of the present invention
The block diagram of family equipment 400.In some embodiments, user equipment 400 can be mobile phone, tablet computer, Portable pen
Remember the equipment such as this computer, above-knee laptop.As shown in figure 4, acquisition device 401, transmission power can be used for obtaining maximum；
First determining device 402, at least one device-to-device D2D for determining to the user equipment of receiving terminal it is expected the of link
One path loss power, and determine the second path loss power of at least one interfering link；Second determining device 403 is used
In determining estimation transmission power according to the first path loss power and the second path loss power；And selection dress
404 are set, selects smaller power as transmission work(in transmission power and the estimation transmission power for that can be used from the maximum
Rate.
As can be seen that the user equipment 400 of Fig. 4 may be implemented as with the method shown in figure 3, and although do not show further
Go out, user equipment 400 may include that more devices or functional unit are multiple in conjunction with described in the method 300 of Fig. 3 to realize
All kinds of units of each step of method described in embodiment.
Exemplary embodiments of the present invention are described above by reference to flow chart shown in the drawings and block diagram.It needs to illustrate
To be method disclosed in embodiments of the present invention can realize in the combination of software, hardware or software and hardware.Hardware
Part can be realized using special logic；Software section can store in memory, by instruction execution system appropriate, example
It is executed such as microprocessor or personal computer (PC).In some embodiments, the present invention is embodied as software comprising but not
It is limited to firmware, resident software, microcode etc..
Moreover, can also take can the meter that accesses of or computer-readable medium available from computer for embodiments of the present invention
The form of calculation machine program product, these media provide program code for computer or any instruction execution system use or and its
It is used in combination.For the purpose of description, computer can be used or computer-readable mechanism can be any tangible device, can wrap
Contain, store, communicate, propagate, or transport program with by instruction execution system, device or equipment use or it is in connection.
Medium can be electric, magnetic, light, electromagnetism, infrared ray or semiconductor system (or device or device)
Or propagation medium.The example of computer-readable medium include semiconductor or solid-state memory, tape, removable computer diskette,
Random access storage device (RAM), read-only memory (ROM), hard disc and CD.The example of CD includes compact disk-at present
Read memory (CD-ROM), compact disk-read/write (CD-R/W) and DVD.
It should be noted that the specification for providing the present invention is for the purpose of illustration and description, rather than for exhaustive or
Limit the invention to disclosed form.For those of ordinary skill in the art, many modifications and changes be all can be with
's.Therefore, it is and to make this field in order to preferably explain the principle of the present invention and its practical application that embodiment, which is chosen and described,
Those of ordinary skill understands that under the premise of not departing from essence of the present invention, all modifications and modification are each fallen within by claim institute
Within protection scope of the present invention of restriction.
Claims (24)
1. a kind of method inhibiting interference in the user equipment of transmitting terminal, including：
Transmission power can be used by obtaining maximum；
It determines at least one device-to-device D2D of the user equipment of receiving terminal and it is expected the first path loss power of link,
And determine the second path loss power of at least one interfering link；
Estimation transmission power is determined according to the first path loss power and the second path loss power；And
Can be used in transmission power and the estimation transmission power from the maximum selects smaller power as transmission power.
2. according to the method described in claim 1, wherein determining that at least one D2D to the user equipment of receiving terminal it is expected link
First path loss power include：
Determine that every D2D to the user equipment of receiving terminal it is expected the first estimation path loss power of link；And
The first path loss power is determined according to the determining first estimation path loss power.
3. according to the method described in claim 2, wherein determining that every D2D to the user equipment of receiving terminal it is expected the of link
One, which estimates path loss power, includes：
Every D2D for getting the user equipment of receiving terminal it is expected the first Reference Signal Received Power RSRP of link, and root
Determine that every D2D it is expected the first estimation path loss power of link according to the first RSRP；Or
The first distance between the user equipment of the determining receiving terminal for it is expected link every D2D, and according to described first away from
From determining that every D2D it is expected the first estimation path loss power of link.
4. according to the method described in claim 2, wherein determining that every D2D to the user equipment of receiving terminal it is expected the of link
One, which estimates path loss power, includes：
The first reference signal that the user equipment in the first geographic range is sent using the first predetermined transmission power is received, and really
The reception power of fixed first reference signal is sent wherein the user equipment of the transmitting terminal previously known described first is predetermined
Power；
According to the reception power of the described first predetermined transmission power and each first reference signal, to determine the described first geographical model
The D2D Actual path loss powers of the link between user equipment and the user equipment of the transmitting terminal in enclosing；And
By each use being included at least one D2D expectation links in the user equipment in first geographic range
D2D Actual paths loss power between family equipment and the user equipment of the transmitting terminal it is expected the of link as every D2D
One estimation path loss power.
5. according to the method described in claim 2, wherein determining that every D2D to the user equipment of receiving terminal it is expected the of link
One, which estimates path loss power, includes：
Second reference signal is sent using the second predetermined transmission power, and determines the user for receiving second reference signal
The reception power of equipment；
According to the reception power of the described second predetermined transmission power and the user equipment for each receiving second reference signal,
To determine the link between the user equipment and the user equipment of the transmitting terminal that each receive second reference signal
D2D Actual path loss powers；And
At least one D2D that is included in the user equipment for receiving second reference signal it is expected into each of link
The D2D Actual paths loss power of link between user equipment and the user equipment of the transmitting terminal it is expected as every D2D
First estimation path loss power of link.
6. according to the method described in any one of claim 2 to 5 claim, wherein according to determining first estimation road
Diameter loss power includes to determine the first path loss power：
Maximum first estimation path loss power in the determining first estimation path loss power is determined as described the
One path loss power；
Calculate the harmonic-mean of determining the first estimation path loss power, and the harmonic-mean that will be calculated
As the first path loss power；Or
Calculate the linear combination average value of determining the first estimation path loss power, and the line that will be calculated
Property combination average value is as the first path loss power.
7. according to the method described in claim 1, the wherein described interfering link includes identical by it is expected that link uses with the D2D
The D2D interfering links of the user equipment of the receiving terminals of other D2D links of resource block and transmitting terminal composition, and/or by with
The D2D it is expected bee of the link using the receiving terminal of the cellular link of same resource block and the user equipment composition of the transmitting terminal
Nest interfering link,
Wherein determine that the second path loss power of at least one interfering link includes：
It determines the first interference path loss power of the D2D interfering links, and/or determines the second of the honeycomb interfering link
Interference path loss power；
Second tunnel is determined according to the first interference path loss power and/or the second interference path loss power
Diameter loss power.
8. according to the method described in claim 7, wherein determining the first interference path loss power packet of the D2D interfering links
It includes：
Determine the second estimation path loss power of every D2D interfering link；And
The first interference path loss power is determined according to the determining second estimation path loss power.
9. according to the method described in claim 8, wherein determining the second estimation path loss power packet of every D2D interfering link
It includes：
The 2nd RSRP on every D2D interfering link is obtained, and every D2D interfering link is determined according to the 2nd RSRP
Second estimation path loss power；Or
The determining second distance between the user equipment of the receiving terminal of every D2D interfering link, and according to described second away from
From determining the second estimation path loss power of every D2D interfering link.
10. according to the method described in claim 8, wherein determining the second estimation path loss power of every D2D interfering link
Including：
The first reference signal that the user equipment in the first geographic range is sent using the first predetermined transmission power is received, and really
The reception power of fixed first reference signal is sent wherein the user equipment of the transmitting terminal previously known described first is predetermined
Power；
According to the reception power of the described first predetermined transmission power and each first reference signal, to determine the described first geographical model
The D2D Actual path loss powers of the link between user equipment and the user equipment of the transmitting terminal in enclosing；
Except the user for being included at least one D2D expectation links sets in user equipment in wherein described first geographic range
The user equipment of other users equipment and the transmitting terminal except standby forms D2D interfering links；And
The D2D Actual path loss powers of every D2D interfering link are determined as to the second estimation path of every D2D interfering link
Loss power.
11. according to the method described in claim 8, wherein determining the second estimation path loss power of every D2D interfering link
Including：
Second reference signal is sent using the second predetermined transmission power, and determines the user for receiving second reference signal
The reception power of equipment；
According to the reception power of the described second predetermined transmission power and the user equipment for each receiving second reference signal,
To determine the link between the user equipment and the user equipment of the transmitting terminal that each receive second reference signal
D2D Actual path loss powers；
It wherein receives in the user equipment of second reference signal except the use for being included at least one D2D expectation links
The D2D interfering links of the user equipment composition of other users equipment and the transmitting terminal except the equipment of family；And
The D2D Actual path loss powers of every D2D interfering link are determined as to the second estimation path of every D2D interfering link
Loss power.
12. according to the method described in any one of claim 8 to 11 claim, wherein according to determining second estimation
Path loss power includes to determine the first interference path loss power：
The second estimation path loss power minimum in the determining second estimation path loss power is determined as described the
One interference path loss power；
The harmonic-mean of determining the second estimation path loss power is calculated, and the reconciliation being calculated is put down
Mean value is as the first interference path loss power；Or
The linear combination average value of determining the second estimation path loss power is calculated, and described linear by what is be calculated
Combination average value is as the first interference path loss power.
13. according to the method described in claim 7, wherein determining the second interference path loss power of the honeycomb interfering link
Including：
Determine the honeycomb Actual path loss power of every honeycomb interfering link；And
The second interference path loss power is determined according to the determining honeycomb Actual path loss power.
14. according to the method for claim 13, wherein determining that work(is lost in the honeycomb Actual path of every honeycomb interfering link
Rate includes：
Receive the third reference signal that the receiving terminal of every honeycomb interfering link is sent using the predetermined transmission power of third, wherein institute
State the previously known predetermined transmission power of third of user equipment of transmitting terminal；
Determine the reception power of the third reference signal received；And
Every bee is determined according to the reception power of the third reference signal received and the predetermined transmission power of the third
The honeycomb Actual path loss power of nest interfering link.
15. the method according to claim 13 or 14, wherein according to the determining honeycomb Actual path loss power come
Determine that the second interference path loss power includes：
Honeycomb Actual path loss power minimum in the determining honeycomb Actual path loss power is determined as described
Two interference path loss powers；
The harmonic-mean of the determining honeycomb Actual path loss power is calculated, and the reconciliation being calculated is put down
Mean value is as the second interference path loss power；Or
Calculate the linear combination average value of the determining honeycomb Actual path loss power, and the line that will be calculated
Property combination average value is as the second interference path loss power.
16. the method according to claim 4 or 10, wherein the user equipment received in the first geographic range is pre- using first
Determining the first reference signal that transmission power is sent includes：
It is broadcasted using preconfigured transmission power and measures request, and the user equipment for measuring request will be received and defined
For the user equipment in first geographic range；And
Receive the first reference letter that the user equipment in first geographic range is sent using the first predetermined transmission power
Number.
17. the method according to claim 4 or 10, wherein the user equipment received in the first geographic range is pre- using first
Determining the first reference signal that transmission power is sent includes：
Receive the base of user equipment cell residing for the user equipment for receiving the transmitting terminal in first geographic range
First reference signal stand after the measurement request sent, sent using the first predetermined transmission power；
Wherein, the user in previously known first geographic range in the base station of cell residing for the user equipment of the transmitting terminal sets
Standby geographical location.
18. according to the method for claim 17, wherein the user equipment received in first geographic range is receiving
After the measurement request that the base station of cell residing for the user equipment of the transmitting terminal is sent, using the first predetermined transmission power transmission
First reference signal includes：
When user equipment in first geographic range is respectively positioned in the cell residing for the user equipment of the transmitting terminal, connect
The base station for receiving user equipment cell residing for the user equipment for receiving the transmitting terminal in first geographic range is direct
After the measurement request of transmission, using first reference signal of the first predetermined transmission power transmission；
User equipment in first geographic range is not respectively positioned in the cell residing for the user equipment of the transmitting terminal
When, it receives the user equipment being located in the user equipment in first geographic range in the cell residing for the transmitting terminal and is connecing
Predetermined work(is sent after receiving the measurement request that the base station of cell residing for the user equipment of the transmitting terminal directly transmits, using first
First reference signal that rate is sent, and receive in the user equipment in the first geographic range in addition to being located at the transmitting terminal
Other users equipment except residing cell is in the base station for receiving cell residing for the user equipment first by the transmitting terminal
After the base station for being sent to predetermined neighboring community, the measurement forwarded again by the base station of the predetermined neighboring community request, using first
First reference signal that predetermined transmission power is sent.
19. according to the method described in claim 1, wherein according to the first path loss power and second path loss
Power come determine estimation transmission power include：
The estimation hair is determined according to the first path loss power, the second path loss power and systematic parameter
Send power；
The wherein described systematic parameter includes following one or more：Scheduled open Loop Power control parameter, the D2D it is expected link
Upper allocated resource block quantity, the compensation of transformat and scheduled close-loop power control parameter.
20. according to the method described in claim 1, wherein before determining that maximum can be with transmission power, in the transmitting terminal
When each user equipment in the user equipment of user equipment and the receiving terminal is satisfied by D2D communication conditions, with the reception
The user equipment at end establishes the D2D and it is expected link.
21. according to the method for claim 20, wherein the D2D it is expected that link is one, the user of the transmitting terminal sets
Each user equipment in the user equipment of the standby and described receiving terminal meets the group of one or more of following D2D communication conditions
It closes：
The D2D it is expected that the 3rd RSRP of link is more than or equal to the link between each user equipment and the base station of its residing cell
The 4th RSRP；
The 3rd RSRP of first predetermined ratio is more than or equal to each user equipment and is used with D2D expectation links identical
5th RSRP of the link between the receiving terminal of the cellular link of resource block；
6th RSRP of the second predetermined ratio is more than or equal to the 4th RSRP, wherein the 6th RSRP is and the D2D phases
Link is hoped to use the RSRP of the cellular link of same resource block；
Each the link between user equipment and the base station of its residing cell is less than in the channel quality indicator CQI of scheduled duration
First predetermined threshold value；
The D2D it is expected that the quantity of the resource block of chain road distribution is less than the second predetermined threshold；
It establishes the D2D and it is expected that the total frequency spectrum utilization rate after link is total before the D2D it is expected link more than or equal to establishing
The availability of frequency spectrum.
22. according to the method described in claim 1, before determining that maximum can be with transmission power, for any resource block,
Two and rate when being more than or equal to first and rate, the resource block is distributed into the D2D and it is expected link；
Wherein described first and rate be the resource block be assigned to other D2D links and cellular link without be assigned
When it is expected link to the D2D, other described D2D links and the cellular link and rate；Described second and rate be
When the resource block is assigned to other described D2D links and the cellular link, the resource block is reallocated to the D2D
It is expected that in the case of link other described D2D links, the cellular link and the D2D it is expected link and rate.
23. according to the method for claim 22, wherein the D2D it is expected that link is one, and described first and rate are root
The sum determined according to the RSRP on the RSRP and its interfering link of each of the links in other described D2D links and the cellular link
Rate；Described second and rate be it is expected according to other described D2D links, the cellular link and the D2D it is every in link
The RSRP of the link and its RSRP of interfering link is determined and rate.
24. a kind of user equipment, including：
Acquisition device can use transmission power for obtaining maximum；
First determining device, for determining that at least one device-to-device D2D to the user equipment of receiving terminal it is expected link
First path loss power, and determine the second path loss power of at least one interfering link；
Second determining device, for determining estimation according to the first path loss power and the second path loss power
Transmission power；And
Selection device, for can be used from the maximum selected in transmission power and the estimation transmission power smaller power as
Transmission power.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310347939.0A CN104349437B (en) | 2013-08-09 | 2013-08-09 | Method for inhibiting interference and user equipment |
| TW103126908A TW201521370A (en) | 2013-08-09 | 2014-08-06 | Method and device for mitigating interference |
| PCT/IB2014/002007 WO2015019179A2 (en) | 2013-08-09 | 2014-08-08 | Method and device for mitigating interference |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310347939.0A CN104349437B (en) | 2013-08-09 | 2013-08-09 | Method for inhibiting interference and user equipment |
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| Publication Number | Publication Date |
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| CN104349437A CN104349437A (en) | 2015-02-11 |
| CN104349437B true CN104349437B (en) | 2018-10-19 |
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| CN201310347939.0A Active CN104349437B (en) | 2013-08-09 | 2013-08-09 | Method for inhibiting interference and user equipment |
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| Country | Link |
|---|---|
| CN (1) | CN104349437B (en) |
| TW (1) | TW201521370A (en) |
| WO (1) | WO2015019179A2 (en) |
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| US10390316B2 (en) | 2015-04-10 | 2019-08-20 | Telefonaktiebolaget Lm Ericsson (Publ) | Methods of enabling measurements for handling of a device-to-device D2D side link in a cellular system |
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| CN108702244B (en) * | 2016-04-01 | 2022-04-29 | 英特尔公司 | Link adaptation for low complexity device-to-device (D2D) communication |
| US9986513B1 (en) | 2016-12-31 | 2018-05-29 | Sprint Communications Company L.P. | Device to-device (D2D) transmission power control |
| CN110149689B (en) * | 2018-02-11 | 2022-03-25 | 华为技术有限公司 | Power control method and device |
| CN110381574A (en) * | 2018-04-12 | 2019-10-25 | 维沃移动通信有限公司 | Open loop power control method and apparatus in sidelink communication |
| CN112166631B (en) * | 2018-07-20 | 2024-06-21 | 苹果公司 | Method and apparatus for V2X communication |
| US11818669B2 (en) * | 2018-09-19 | 2023-11-14 | Nec Corporation | Method, apparatus and computer readable media for power control in a wireless communication system |
| CN111148205B (en) * | 2018-11-02 | 2022-03-25 | 华为技术有限公司 | Method and device for determining transmission power |
| CN112997546A (en) * | 2018-11-08 | 2021-06-18 | 康维达无线有限责任公司 | Sidelink transmit power control for new radio V2X |
| CN111294914A (en) * | 2019-01-11 | 2020-06-16 | 展讯通信（上海）有限公司 | Method and device for receiving and sending path loss of direct link, storage medium and terminal |
| CN114375034A (en) | 2019-02-15 | 2022-04-19 | 成都华为技术有限公司 | Power control method and power control device |
| EP4593473A3 (en) * | 2019-02-15 | 2025-10-15 | Guangdong Oppo Mobile Telecommunications Corp., Ltd. | Method and apparatus for wireless communication |
| EP3932122A4 (en) * | 2019-03-01 | 2023-01-18 | Lenovo (Beijing) Limited | Method and apparatus for controlling transmission power on a sidelink |
| CN111294754B (en) * | 2019-03-28 | 2022-10-11 | 展讯通信（上海）有限公司 | Uplink transmission method and device based on direct link resources and storage medium |
| SG11202110851QA (en) | 2019-04-01 | 2021-10-28 | Guangdong Oppo Mobile Telecommunications Corp Ltd | Apparatus and method for transmission power control of same |
| CN110602776B (en) * | 2019-09-30 | 2021-10-29 | 展讯通信（上海）有限公司 | Reference Signal Received Power (RSRP) measuring method and device for direct link |
| CN113453197B (en) * | 2021-06-28 | 2022-06-21 | 华南师范大学 | User pairing method combining mobile prediction and dynamic power |
| CN115707076A (en) * | 2021-08-13 | 2023-02-17 | 华为技术有限公司 | Power control method and device |
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| Publication number | Publication date |
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| CN104349437A (en) | 2015-02-11 |
| TW201521370A (en) | 2015-06-01 |
| WO2015019179A2 (en) | 2015-02-12 |
| WO2015019179A3 (en) | 2015-05-07 |
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