CN104244392A - Method for preventing D2D transmission from causing uplink interference, base station and user equipment - Google Patents
Method for preventing D2D transmission from causing uplink interference, base station and user equipment Download PDFInfo
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- CN104244392A CN104244392A CN201310250304.9A CN201310250304A CN104244392A CN 104244392 A CN104244392 A CN 104244392A CN 201310250304 A CN201310250304 A CN 201310250304A CN 104244392 A CN104244392 A CN 104244392A
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- user equipment
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/06—TPC algorithms
- H04W52/14—Separate analysis of uplink or downlink
- H04W52/143—Downlink power control
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/38—TPC being performed in particular situations
- H04W52/383—TPC being performed in particular situations power control in peer-to-peer links
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/38—TPC being performed in particular situations
- H04W52/386—TPC being performed in particular situations centralized, e.g. when the radio network controller or equivalent takes part in the power control
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Abstract
The embodiment of the invention provides a method for preventing D2D transmission from causing uplink interference, a base station and user equipment. The method comprises the steps that the base station sends uplink pilot frequency resource configuration information to first user equipment; the base station receives an uplink pilot frequency signal which is configured and sent by the first user equipment according to an uplink pilot frequency resource; the base station determines power control information according to the receiving strength of the uplink pilot frequency signal, and the signal receiving strength of the uplink pilot frequency signal indicates the interference caused by the first user equipment and the second user equipment executing D2D transmission to uplink transmission between third user equipment and the base station; the base station sends power control information to the first user equipment. The base station determines the power control information according to the receiving strength of the uplink pilot frequency signal to control the sending power of the third user equipment for executing D2D transmission, and therefore the interference of D2D transmission on uplink signals of common user equipment is avoided.
Description
Technical field
The present invention relates to wireless communication field, and more specifically, relate to avoid D2D to transmit causing uplink interference method, base station and subscriber equipment.
Background technology
Device-to-device (Device-to-Device, D2D) communication is a kind of under the control of system, is directly carried out the new technique communicated between permission terminal by reuse pattern resource.The uplink resource of D2D general reuse pattern when signal transmission.In D2D transmission, if subscriber equipment D1 and subscriber equipment D2 finds that mutual distance is very near, just can get around base station, such as evolved base station (eNB or e-NodeB, evolutional Node B), directly connects and corresponding data is sent to the other side.D2D can take band resource that normal cellular communication uses to save the equipment cost of subscriber equipment (UE, User Equipment), only needs increase receiving function in upstream band.
Owing to occupying the upstream band of cellular communication, the uplink of D2D transmission and normal cellular system can exist simultaneously, and this just likely can produce interference each other.Flagrant, the uplink of normal cellular system can be subject to the interference of D2D transmission, causes the decline of transmission quality, especially carry out the equipment citing base station of D2D transmission nearer time, huge uplink interference may be caused.
Summary of the invention
The method that the embodiment of the present invention provides a kind of D2D of avoiding transmission to cause uplink interference, base station and subscriber equipment, can solve the interference of D2D transmission to normal user equipments upward signal.
First aspect, provides the method that a kind of D2D of avoiding transmission causes uplink interference, comprising: base station sends ascending pilot frequency resource allocation information to first user equipment; Described base station receives described first user equipment and follows the uplink pilot signal sent according to described ascending pilot frequency resource allocation information configuration concurrency; Described base station is according to the receiving intensity determination power control information of described uplink pilot signal, and the receiving intensity of the signal of wherein said uplink pilot signal indicates described first user equipment and the second subscriber equipment actuating equipment to transmit the interference caused the uplink between the 3rd subscriber equipment and described base station to equipment D2D; Described base station sends described power control information to described first user equipment.
In conjunction with first aspect, in its first implementation, described ascending pilot frequency resource allocation information comprises following at least one: the running time-frequency resource that described uplink pilot signal takies; The pilot frequency sequence of described uplink pilot signal; The transmitting power of described uplink pilot signal.
In conjunction with first aspect and above-mentioned implementation thereof, in its second implementation, the described signal receiving strength determination power control information according to described uplink pilot signal, comprise: according to the signal receiving strength of described uplink pilot signal and the transmitting power of described uplink pilot signal, determine the path loss between described first user equipment and base station; Bear thresholding according to described path loss and default interference, determine that described first user equipment performs the maximum transmission power of D2D transmission, it is the maximal received power receiving described D2D transmission that described base station can be tolerated that thresholding is born in wherein said interference.
In conjunction with first aspect and above-mentioned implementation thereof, in its third implementation, describedly send described power control information to described first user equipment and comprise: send described maximum transmission power to described first user equipment, the transmitting power making described first user equipment perform D2D transmission is less than described maximum transmission power.
In conjunction with first aspect and above-mentioned implementation thereof, in its 4th kind of implementation, the described signal receiving strength determination power control information according to described uplink pilot signal, comprise: the signal receiving strength according to described uplink pilot signal bears thresholding with the interference preset, determine whether described D2D transmission causes uplink interference to described 3rd subscriber equipment, it is the maximal received power receiving described D2D transmission that described base station can be tolerated that thresholding is born in wherein said interference; When the signal receiving strength of described uplink pilot signal be greater than or equal to described interference bear thresholding time, determine that described first user equipment performs the reducing amount of the transmitting power of D2D transmission.
In conjunction with first aspect and above-mentioned implementation thereof, in its 5th kind of implementation, describedly send described power control information to described first user equipment and comprise: the reducing amount sending the transmitting power that described D2D transmits to described first user equipment, is reduced to described interference with the transmitting power making described first user equipment perform D2D transmission and bears below thresholding.
In conjunction with first aspect and above-mentioned implementation thereof, in its 6th kind of implementation, described uplink pilot signal comprises detection reference signal SRS or demodulated reference signal DMRS.
Second aspect, provides the method that a kind of D2D of avoiding transmission causes uplink interference, comprising: first user equipment receives the ascending pilot frequency resource allocation information that base station sends; Described first user equipment send uplink pilot signal according to described ascending pilot frequency resource allocation information configuration concurrency, so that described base station is according to the receiving intensity determination power control information of described uplink pilot signal, the receiving intensity of the signal of wherein said uplink pilot signal indicates described first user equipment and the second subscriber equipment actuating equipment to transmit the interference caused the uplink between the 3rd subscriber equipment and described base station to equipment D2D; Described first user equipment receives the described power control information that described base station sends.
In conjunction with second aspect, in its first implementation, described ascending pilot frequency resource allocation information comprises following at least one: the running time-frequency resource that described uplink pilot signal takies; The pilot frequency sequence of described uplink pilot signal; The transmitting power of described uplink pilot signal.
In conjunction with second aspect and above-mentioned implementation thereof, in its second implementation, described uplink pilot signal comprises detection reference signal SRS or demodulated reference signal DMRS.
The third aspect, provides a kind of base station, comprising: the first transmitting element, for sending ascending pilot frequency resource allocation information to first user equipment; Receiving element, follows for receiving described first user equipment the uplink pilot signal sent according to described ascending pilot frequency resource allocation information configuration concurrency; Determining unit, for the receiving intensity determination power control information according to described uplink pilot signal, the receiving intensity of the signal of wherein said uplink pilot signal indicates described first user equipment and the second subscriber equipment actuating equipment to transmit the interference caused the uplink between the 3rd subscriber equipment and described base station to equipment D2D; Second transmitting element, for sending described power control information to described first user equipment.
In conjunction with the third aspect, in its first implementation, the ascending pilot frequency resource allocation information that described first transmitting element sends comprises following at least one: the running time-frequency resource that described uplink pilot signal takies; The pilot frequency sequence of described uplink pilot signal; The transmitting power of described uplink pilot signal.
In conjunction with the third aspect and above-mentioned implementation thereof, in its second implementation, described determining unit specifically for: according to the signal receiving strength of described uplink pilot signal and the transmitting power of described uplink pilot signal, determine the path loss between described first user equipment and base station; Bear thresholding according to described path loss and default interference, determine that described first user equipment performs the maximum transmission power of D2D transmission, it is the maximal received power receiving described D2D transmission that described base station can be tolerated that thresholding is born in wherein said interference.
In conjunction with the third aspect and above-mentioned implementation thereof, in its third implementation, described second transmitting element specifically for: send described maximum transmission power to described first user equipment, make described first user equipment perform D2D transmission transmitting power be less than described maximum transmission power.
In conjunction with the third aspect and above-mentioned implementation thereof, in its 4th kind of implementation, described determining unit specifically for: bear thresholding according to the signal receiving strength of described uplink pilot signal and the interference preset, determine whether described D2D transmission causes uplink interference to described 3rd subscriber equipment, it is the maximal received power receiving described D2D transmission that described base station can be tolerated that thresholding is born in wherein said interference; When the signal receiving strength of described uplink pilot signal be greater than or equal to described interference bear thresholding time, determine that described first user equipment performs the reducing amount of the transmitting power of D2D transmission.
In conjunction with the third aspect and above-mentioned implementation thereof, in its 5th kind of implementation, described second transmitting element specifically for: send to described first user equipment the reducing amount of transmitting power that described D2D transmits, be reduced to described interference with the transmitting power making described first user equipment perform D2D transmission and bear below thresholding.
In conjunction with the third aspect and above-mentioned implementation thereof, in its 6th kind of implementation, described uplink pilot signal comprises detection reference signal SRS or demodulated reference signal DMRS.
Fourth aspect, provides a kind of subscriber equipment, comprising: the first receiving element, for receiving the ascending pilot frequency resource allocation information that base station sends; Dispensing unit, for according to described ascending pilot frequency resource allocation information collocating uplink pilot signal; Transmitting element, for sending the uplink pilot signal of described dispensing unit configuration, so that described base station is according to the receiving intensity determination power control information of described uplink pilot signal, the receiving intensity of the signal of wherein said uplink pilot signal indicates described first user equipment and the second subscriber equipment actuating equipment to transmit the interference caused the uplink between the 3rd subscriber equipment and described base station to equipment D2D; Second receiving element, for receiving the described power control information that described base station sends.
In conjunction with fourth aspect, in its first implementation, described ascending pilot frequency resource allocation information comprises following at least one: the running time-frequency resource that described uplink pilot signal takies; The pilot frequency sequence of described uplink pilot signal; The transmitting power of described uplink pilot signal.
In conjunction with fourth aspect and above-mentioned implementation thereof, in its second implementation, described uplink pilot signal comprises detection reference signal SRS or demodulated reference signal DMRS.
The embodiment of the present invention, by making base station according to the receiving intensity determination power control information of uplink pilot signal, to control the transmitted power that first user equipment performs D2D transmission, thus solves the interference of D2D transmission to normal user equipments upward signal.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme of the embodiment of the present invention, be briefly described to the accompanying drawing used required in the embodiment of the present invention below, apparently, accompanying drawing described is below only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is that one embodiment of the invention avoids D2D to transmit the method flow diagram causing uplink interference.
Fig. 2 is that one embodiment of the invention avoids D2D to transmit the method flow diagram causing uplink interference.
Fig. 3 is that one embodiment of the invention avoids D2D to transmit the method interaction figure causing uplink interference.
Fig. 4 is that another embodiment of the present invention avoids D2D to transmit the method interaction figure causing uplink interference.
Fig. 5 is the schematic block diagram of the base station of one embodiment of the invention.
Fig. 6 is the schematic block diagram of the subscriber equipment of one embodiment of the invention.
Fig. 7 is the schematic block diagram of the base station of another embodiment of the present invention.
Fig. 8 is the schematic block diagram of the subscriber equipment of another embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is a part of embodiment of the present invention, instead of whole embodiment.Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art obtain under the prerequisite not making creative work, all should belong to the scope of protection of the invention.
Technical scheme of the present invention, various communication system can be applied to, such as: global system for mobile communications (GSM, Global System of Mobile communication), code division multiple access (CDMA, Code Division Multiple Access) system, Wideband Code Division Multiple Access (WCDMA) (WCDMA, Wideband Code Division Multiple Access Wireless), GPRS (GPRS, General Packet Radio Service), Long Term Evolution (LTE, Long Term Evolution) etc.
Subscriber equipment (UE, User Equipment), also mobile terminal (Mobile Terminal), mobile subscriber equipment etc. can be referred to as, can through wireless access network (such as, RAN, Radio Access Network) communicate with one or more core net, subscriber equipment can be mobile terminal, as mobile phone (or being called " honeycomb " phone) and the computer with mobile terminal, such as, can be portable, pocket, hand-hold type, built-in computer or vehicle-mounted mobile device, they and wireless access network exchange language and/or data.
Base station can be the base station (BTS, Base Transceiver Station) in GSM or CDMA, also can be the base station (NodeB) in WCDMA, can also be the evolved base station (eNB or e-NodeB, evolutional Node B) in LTE, the present invention limit.
Fig. 1 is that one embodiment of the invention avoids D2D to transmit the method flow diagram causing uplink interference.The method of Fig. 1 is performed by base station.
101, base station sends ascending pilot frequency resource allocation information to first user equipment.
102, base station receives first user equipment and follows the uplink pilot signal sent according to ascending pilot frequency resource allocation information configuration concurrency.
103, base station according to the receiving intensity determination power control information of uplink pilot signal, the wherein interference that the 3rd uplink between subscriber equipment and base station caused to equipment D2D transmission of the receiving intensity instruction first user equipment of the signal of uplink pilot signal and the second subscriber equipment actuating equipment.
104, base station is to first user equipment transmission power control information.
The embodiment of the present invention, by making base station according to the receiving intensity determination power control information of uplink pilot signal, to control the transmitted power that first user equipment performs D2D transmission, thus solves the interference of D2D transmission to normal user equipments upward signal.
Alternatively, as an embodiment, ascending pilot frequency resource allocation information can comprise following at least one: the running time-frequency resource that uplink pilot signal takies; The pilot frequency sequence of uplink pilot signal; The transmitting power of uplink pilot signal.Ascending pilot frequency resource allocation information can be pre-configured by base station, is used to indicate first user equipment on specific running time-frequency resource, adopts specific pilot frequency sequence to send uplink pilot signal with specific transmitting power.
Alternatively, as an embodiment, above-mentioned steps 103 specifically can comprise: according to the signal receiving strength of uplink pilot signal and the transmitting power of uplink pilot signal, determine the path loss between first user equipment and base station; Bear thresholding according to path loss and default interference, determine that first user equipment performs the maximum transmission power of D2D transmission, wherein thresholding is born in interference is the maximal received power receiving D2D transmission that base station can be tolerated.
Particularly, the transmitting power of uplink pilot signal is pre-configured by ascending pilot frequency resource allocation information by base station, this transmitting power can be identical or different from the transmitted power of actual D2D transfer of data, when this transmitting power is different from the transmitted power of actual D2D transfer of data, or when not knowing whether identical, such as, when adopting detection reference signal SRS as uplink pilot signal, path loss between first user equipment and base station can be estimated according to the received power of this uplink pilot signal, and bear thresholding and determine according to interference the maximum transmission power that D2D transmits further.
Alternatively, as an embodiment, step 104 can comprise: send maximum transmission power to first user equipment, and the transmitting power making first user equipment perform D2D transmission is less than maximum transmission power.
Alternatively, as an embodiment, step 103 can also comprise: the signal receiving strength according to uplink pilot signal bears thresholding with the interference preset, determine whether D2D transmission causes uplink interference to the 3rd subscriber equipment, wherein thresholding is born in interference is the maximal received power receiving D2D transmission that base station can be tolerated; When the signal receiving strength of uplink pilot signal be greater than or equal to interference bear thresholding time, determine that first user equipment performs the reducing amount of the transmitting power of D2D transmission.
Particularly, when the transmitting power of uplink pilot signal is substantially identical with the transmitted power of actual D2D transfer of data, such as, when adopting demodulated reference signal DMRS as uplink pilot signal, directly the receiving intensity of this uplink pilot signal can be transmitted interference strength for normal user equipments upward signal as D2D.
In addition, alternatively, the reducing amount of transmitting power that first user equipment performs D2D transmission can be determined by the formula of systemic presupposition, also can exceed with the signal receiving strength of uplink pilot signal the part that interference bears thresholding and add that the value of a systemic presupposition is used as the reducing amount of the transmitting power of D2D transmission.
Alternatively, as an embodiment, step 104 can also comprise: the reducing amount sending the transmitting power of D2D transmission to first user equipment, is reduced to interference bears below thresholding with the transmitting power making first user equipment perform D2D transmission.
Alternatively, as an embodiment, uplink pilot signal comprises detection reference signal SRS or demodulated reference signal DMRS.
The embodiment of the present invention is by base station measurement uplink pilot signal, estimate the interference that D2D transmission brings for the uplink of normal users equipment, and the power upper limit transmitted by D2D by base station or transmitting power reduce order sends to the subscriber equipment performing D2D transmission, to limit the interference of D2D transmission to normal user equipments upward signal, thus D2D transmit the interference control that brings within the acceptable range.
Fig. 2 is that one embodiment of the invention avoids D2D to transmit the method flow diagram causing uplink interference.The method of Fig. 2 is performed by first user equipment UE 1.
201, first user equipment receives the ascending pilot frequency resource allocation information that base station sends.
202, first user equipment send uplink pilot signal according to ascending pilot frequency resource allocation information configuration concurrency, so that base station is according to the receiving intensity determination power control information of uplink pilot signal, the wherein interference that the 3rd uplink between subscriber equipment and base station caused to equipment D2D transmission of the receiving intensity instruction first user equipment of the signal of uplink pilot signal and the second subscriber equipment actuating equipment.
203, first user equipment receives the power control information that base station sends.
The embodiment of the present invention, by making base station according to the receiving intensity determination power control information of uplink pilot signal, to control the transmitted power that first user equipment performs D2D transmission, thus solves the interference of D2D transmission to normal user equipments upward signal.
Alternatively, as an embodiment, ascending pilot frequency resource allocation information can comprise following at least one: the running time-frequency resource that uplink pilot signal takies; The pilot frequency sequence of uplink pilot signal; The transmitting power of uplink pilot signal.Ascending pilot frequency resource allocation information can be pre-configured by base station, is used to indicate first user equipment on specific running time-frequency resource, adopts specific pilot frequency sequence to send uplink pilot signal with specific transmitting power.
Alternatively, as an embodiment, uplink pilot signal comprises detection reference signal SRS or demodulated reference signal DMRS.
Alternatively, first user equipment receives the power control information that base station sends, and carries out the transmitting power adjustment of D2D transmission according to this power control information.When power control information comprises the maximum transmission power of the D2D transmission determined base station, first user equipment guarantees that the transmitting power that D2D transmits is less than this maximum transmission power.When power control information comprises the reducing amount of the transmitting power of D2D transmission, first user equipment adjusts current D2D transmitting power according to this reducing amount.
The embodiment of the present invention is by base station measurement uplink pilot signal, estimate the interference that D2D transmission brings for the uplink of normal users equipment, and the power upper limit transmitted by D2D by base station or transmitting power reduce order sends to the subscriber equipment performing D2D transmission, to limit the interference of D2D transmission to normal user equipments upward signal, thus D2D transmit the interference control that brings within the acceptable range.
Fig. 3 is that one embodiment of the invention avoids D2D to transmit the method interaction figure causing uplink interference.The interaction figure of Fig. 3 comprises base station, first user equipment UE 1, second user equipment (UE) 2, the 3rd user equipment (UE) 3.Wherein, perform D2D between UE1 and UE2 and communicate, and UE3 is normal cellular network users equipment, UE3 and base station perform generic uplink and transmit.Base station is the serving BS of UE1 and UE3, and UE2 can belong to this base station also can belong to other base stations, and the present invention does not limit this.
301, base station sends ascending pilot frequency resource allocation information to UE1.
Particularly, when base station judges that the D2D transmission of UE1 may produce comparatively strong jamming to normal cellular system uplink, such as base station detects that the reduction of the index such as the quality of reception or received power of generic uplink signal acquires a certain degree, then by wireless heterogeneous networks (Radio Resource Control, RRC) signaling is to UE1 collocating uplink pilot resources, such as, collocating uplink detecting reference signal (Sounding Reference Signal, SRS), instruction UE1 adopts specific SRS pilot frequency sequence and transmitting power to send SRS on specific running time-frequency resource.
302, UE1 sends uplink pilot signal.
UE1 receive base station send include the signaling of ascending pilot frequency resource allocation information after, according to this configuration information send SRS.Should understand, this SRS transmits for the D2D between UE1 and UE2, because it takies the ascending resource of normal cellular system, and there is potential possibility generic uplink transmission being caused to interference, so this SRS also can be monitored in base station in the resource shared by this SRS.
303, determine the path loss between UE1 and base station.
Base station sends in the resource of ascending pilot frequency at UE1 and monitors uplink pilot signal, such as, and SRS.The receiving intensity of signal is determined after listening to SRS.Transmitting power due to uplink pilot signal is configured to UE1 by base station, so the path loss that base station can be estimated between UE1 and base station according to the transmitting power of uplink pilot signal and receiving intensity.Such as,
pathloss_UE1_eNB=P_SRS-RSRP
Wherein, pathloss_UE1_eNB represents the path loss between UE1 and base station, and P_SRS represents the transmitting power of uplink pilot signal SRS, and RSRP represents the received power (intensity) of SRS.
Should understand, because the transmitting power of SRS is configured by base station, and this transmitting power and D2D transmit transmitting power used does not have correlation, so estimate the path loss between UE1 and base station by this step, so that estimate that different D2D transmitting power transmits the annoyance level caused for generic uplink according to path loss further.
304, determine maximum transmission power.
Thresholding (Threshold) is born according to the interference of the path loss in step 303 and predefined ascending honeycomb system transfers in base station, calculates the upper limit of the transmitting power of D2D transmission.Wherein, interference bear thresholding be by system pre-configured be used to indicate the received power that maximum D2D that this base station that can tolerate base station receives transmits, exceed this thresholding and then think that D2D transmission causes intolerable strong jamming for normal upstream transmission.Particularly, the upper limit of the transmitting power that D2D transmits can be determined by following formula:
P_D2Dmax*pathloss_UE1_eNB=Threshold
Wherein, P_D2Dmax represents the upper limit of the transmitting power that D2D transmits, and pathloss_UE1_eNB is the path loss between UE1 and base station.Being no more than D2D transmission that this transmitting power reaches the standard grade, can be considered to receive interference to the upward signal of base station less, and can accept.
305, base station sends maximum transmission power to UE1.
Base station by the maximum transmission power P_D2Dmax that obtains in step 304 by RRC signaling UE1.
306, UE1 carries out power adjustment.
After receiving maximum transmission power, UE1, when carrying out D2D transmission, guarantees that transmitting power is lower than P_D2Dmax, causes excessive interference to avoid the uplink receiving to base station (uplink of UE3).Particularly, after UE1 receives maximum transmission power, first more current transmitting power and this maximum transmission power, if current transmit power is less than maximum transmission power, then can maintain current transmit power.If current transmit power is greater than maximum transmission power, then transmitting power is reduced to maximum transmission power, or is reduced to lower than this maximum transmission power.
The embodiment of the present invention is by base station measurement uplink pilot signal, estimate the interference that D2D transmission brings for the uplink of normal users equipment, and the power upper limit transmitted by D2D by base station or transmitting power reduce order sends to the subscriber equipment performing D2D transmission, to limit the interference of D2D transmission to normal user equipments upward signal, thus D2D transmit the interference control that brings within the acceptable range.
Fig. 4 is that another embodiment of the present invention avoids D2D to transmit the method interaction figure causing uplink interference.The interaction figure of Fig. 4 comprises base station, first user equipment UE 1, second user equipment (UE) 2, the 3rd user equipment (UE) 3.Wherein, perform D2D between UE1 and UE2 and communicate, and UE3 is normal cellular network users equipment, UE3 and base station perform generic uplink and transmit.Base station is the serving BS of UE1 and UE3, and UE2 can belong to this base station also can belong to other base stations, and the present invention does not limit this.
401, base station sends ascending pilot frequency resource allocation information to UE1.
Particularly, when base station judges that the D2D transmission of UE1 may produce comparatively strong jamming to normal cellular system uplink, such as base station detects that the reduction of the index such as the quality of reception or received power of generic uplink signal acquires a certain degree, then pass through RC signaling to UE1 collocating uplink pilot resources, such as, configuration demodulated reference signal (Demodulation Reference Signal, DMRS), indicate UE1 on specific running time-frequency resource, adopt specific DMRS pilot frequency sequence and transmitting power to send DMRS.For DMRS, in general the transmitting power used equals D2D data transmission utilization measure, and this power, except configuring to UE1 by base station, also can be obtained according to D2D transmission path loss and link circuit self-adapting oneself by UE1.
402, UE1 sends uplink pilot signal.
UE1 receive base station send include the signaling of ascending pilot frequency resource allocation information after, according to this configuration information send DMRS.Should understand, DMRS is together to send with the ascending resource that the data that actual D2D transmits take normal cellular system with same power, therefore there is potential possibility generic uplink transmission being caused to interference, the resource that base station then can take at DMRS is monitored DMRS to estimate the interference of D2D transmission for generic uplink transmission.
403, determine whether strong jamming.
DMRS is monitored in base station, determines the receiving intensity of this signal, and using this receiving intensity as D2D, transmission is for the interference strength of the uplink receiving (UE3 uplink) of base station.Thresholding (Threshold) is born in interference according to the interference strength estimated and predefined ascending honeycomb system transfers, judges whether this D2D transmission created strong interference to uplink receiving, such as:
P_intf>=Threshold
Wherein, P_intf is the received power of DMRS, particularly, can be RSRP etc.
404, base station is to UE1 transmission power control commands.
When the formula in above-mentioned steps 403 is set up, represent that D2D transmission causes strong jamming to the uplink receiving of base station, base station can reduce the transmitting power of D2D transmission by RRC signaling UE.Such as xdB, wherein:
x=Log（P_intf/Threshold）
Or can pass through system predefined mode determination transmitting power reducing amount, also directly can send one and be used to indicate the order that UE1 reduces transmitting power step by step, the present invention does not limit this.
When being false when the formula in above-mentioned steps 403, illustrating that D2D transmission does not cause strong jamming to the uplink receiving of base station, then can not send any order, or send to UE1 the order that instruction UE1 maintains current transmit power.
405, UE1 carries out power adjustment.
After UE1 receives the power control command of base station transmission, reduce current transmitting power according to the instruction in order.Particularly, if carry reducing amount xdB in power control command, then UE1 reduces xdB on existing transmitting power basis, if when control command instruction UE1 reduces transmitting power step by step, then UE1 reduces step by step according to the power level of systemic presupposition, until bear thresholding (no longer receiving power control command) lower than interference.
The embodiment of the present invention is by base station measurement uplink pilot signal, estimate the interference that D2D transmission brings for the uplink of normal users equipment, and the power upper limit transmitted by D2D by base station or transmitting power reduce order sends to the subscriber equipment performing D2D transmission, to limit the interference of D2D transmission to normal user equipments upward signal, thus D2D transmit the interference control that brings within the acceptable range.
Fig. 5 is the schematic block diagram of the base station of one embodiment of the invention.The base station 50 of Fig. 5 comprises the first transmitting element 51, receiving element 52, determining unit 53 and the second transmitting element 54.
First transmitting element 51 sends ascending pilot frequency resource allocation information to first user equipment.Receiving element 52 receives first user equipment and follows the uplink pilot signal sent according to ascending pilot frequency resource allocation information configuration concurrency.Determining unit 53 is according to the receiving intensity determination power control information of uplink pilot signal, and wherein the receiving intensity of the signal of uplink pilot signal indicates first user equipment and the second subscriber equipment actuating equipment to transmit the interference caused the uplink between the 3rd subscriber equipment and base station 50 to equipment D2D.Second transmitting element 54 is to first user equipment transmission power control information.
The embodiment of the present invention, by making base station 50 according to the receiving intensity determination power control information of uplink pilot signal, to control the transmitted power that first user equipment performs D2D transmission, thus solves the interference of D2D transmission to normal user equipments upward signal.
Alternatively, as an embodiment, the ascending pilot frequency resource allocation information that the first transmitting element 51 sends comprises following at least one: the running time-frequency resource that uplink pilot signal takies; The pilot frequency sequence of uplink pilot signal; The transmitting power of uplink pilot signal.Ascending pilot frequency resource allocation information can be pre-configured by base station 51, is used to indicate first user equipment on specific running time-frequency resource, adopts specific pilot frequency sequence to send uplink pilot signal with specific transmitting power.
Alternatively, as an embodiment, determining unit 53 specifically for: according to the signal receiving strength of uplink pilot signal and the transmitting power of uplink pilot signal, determine the path loss between first user equipment and base station 50; Bear thresholding according to path loss and default interference, determine that first user equipment performs the maximum transmission power of D2D transmission, wherein thresholding is born in interference is the maximal received power receiving D2D transmission that base station 50 can be tolerated.Particularly, the transmitting power of uplink pilot signal is pre-configured by ascending pilot frequency resource allocation information by base station 50, this transmitting power can be identical or different from the transmitted power of actual D2D transfer of data, when this transmitting power is different from the transmitted power of actual D2D transfer of data, or when not knowing whether identical, such as, when adopting detection reference signal SRS as uplink pilot signal, path loss between first user equipment and base station can be estimated according to the received power of this uplink pilot signal, and bear thresholding and determine according to interference the maximum transmission power that D2D transmits further.
Alternatively, as an embodiment, the second transmitting element 54 specifically for: to first user equipment send maximum transmission power, make first user equipment perform D2D transmission transmitting power be less than maximum transmission power.
Alternatively, as an embodiment, determining unit 53 can also be specifically for: bear thresholding according to the signal receiving strength of uplink pilot signal and the interference preset, determine whether D2D transmission causes uplink interference to the 3rd subscriber equipment, wherein thresholding is born in interference is the maximal received power receiving D2D transmission that base station 50 can be tolerated; When the signal receiving strength of uplink pilot signal be greater than or equal to interference bear thresholding time, determine that first user equipment performs the reducing amount of the transmitting power of D2D transmission.Particularly, when the transmitting power of uplink pilot signal is substantially identical with the transmitted power of actual D2D transfer of data, such as, when adopting demodulated reference signal DMRS as uplink pilot signal, directly the receiving intensity of this uplink pilot signal can be transmitted interference strength for normal user equipments upward signal as D2D.
Alternatively, as an embodiment, the second transmitting element 54 specifically for: the reducing amount of transmitting power sending D2D transmission to first user equipment, is reduced to interference with the transmitting power making first user equipment perform D2D transmission and bears below thresholding.
Alternatively, as an embodiment, uplink pilot signal comprises detection reference signal SRS or demodulated reference signal DMRS.
The embodiment of the present invention measures uplink pilot signal by base station 50, estimate the interference that D2D transmission brings for the uplink of normal users equipment, and the power upper limit transmitted by D2D by base station 50 or transmitting power reduce order sends to the subscriber equipment performing D2D transmission, to limit the interference of D2D transmission to normal user equipments upward signal, thus D2D transmit the interference control that brings within the acceptable range.
Fig. 6 is the schematic block diagram of the subscriber equipment of one embodiment of the invention.The subscriber equipment 60 of Fig. 6 comprises the first receiving element 61, dispensing unit 62, transmitting element 63 and the second receiving element 64.
First receiving element 61 receives the ascending pilot frequency resource allocation information that base station sends.Dispensing unit 62 is according to ascending pilot frequency resource allocation information collocating uplink pilot signal.Transmitting element 63 sends the uplink pilot signal of dispensing unit configuration, so that base station is according to the receiving intensity determination power control information of uplink pilot signal, wherein the receiving intensity equipment for indicating user 60 of the signal of uplink pilot signal and the second subscriber equipment actuating equipment transmit the interference caused the 3rd uplink between subscriber equipment and base station to equipment D2D.Second receiving element 64 receives the power control information that base station sends.
The embodiment of the present invention, by making base station according to the receiving intensity determination power control information of uplink pilot signal, to control the transmitted power that subscriber equipment 60 performs D2D transmission, thus solves the interference of D2D transmission to normal user equipments upward signal.
Alternatively, as an embodiment, ascending pilot frequency resource allocation information can comprise following at least one: the running time-frequency resource that uplink pilot signal takies; The pilot frequency sequence of uplink pilot signal; The transmitting power of uplink pilot signal.Ascending pilot frequency resource allocation information can be pre-configured by base station, is used to indicate subscriber equipment 60 on specific running time-frequency resource, adopts specific pilot frequency sequence to send uplink pilot signal with specific transmitting power.
Alternatively, as an embodiment, uplink pilot signal comprises detection reference signal SRS or demodulated reference signal DMRS.
Alternatively, subscriber equipment 60 receives the power control information that base station sends, and carries out the transmitting power adjustment of D2D transmission according to this power control information.When power control information comprises the maximum transmission power of the D2D transmission determined base station, subscriber equipment 60 guarantees that the transmitting power that D2D transmits is less than this maximum transmission power.When power control information comprises the reducing amount of the transmitting power of D2D transmission, subscriber equipment 60 adjusts current D2D transmitting power according to this reducing amount.
The embodiment of the present invention is by base station measurement uplink pilot signal, estimate the interference that D2D transmission brings for the uplink of normal users equipment, and the power upper limit transmitted by D2D by base station or transmitting power reduce order sends to the subscriber equipment performing D2D transmission, to limit the interference of D2D transmission to normal user equipments upward signal, thus D2D transmit the interference control that brings within the acceptable range.
Above-mentioned subscriber equipment 60 or base station 50 can be comprised according to the communication system of the embodiment of the present invention.
Fig. 7 is the schematic block diagram of the base station of another embodiment of the present invention.The base station 70 of Fig. 7 comprises memory 71, processor 72, radiating circuit 73 and antenna 74.
Memory 71 stores and makes processor 72 perform the instruction of following operation: first user equipment sends ascending pilot frequency resource allocation information; Receive first user equipment and follow the uplink pilot signal sent according to ascending pilot frequency resource allocation information configuration concurrency; According to the receiving intensity determination power control information of uplink pilot signal, the wherein interference that the 3rd uplink between subscriber equipment and base station caused to equipment D2D transmission of the receiving intensity instruction first user equipment of the signal of uplink pilot signal and the second subscriber equipment actuating equipment; To first user equipment transmission power control information.
The embodiment of the present invention, by making base station 70 according to the receiving intensity determination power control information of uplink pilot signal, to control the transmitted power that first user equipment performs D2D transmission, thus solves the interference of D2D transmission to normal user equipments upward signal.
In addition, base station 70 can also comprise receiving circuit 75 etc.Processor 72 controls the operation of base station 70, and processor 72 can also be called CPU(Central Processing Unit, CPU).Memory 71 can comprise read-only memory and random access memory, and provides instruction and data to processor 72.A part for memory 71 can also comprise nonvolatile RAM (NVRAM).In concrete application, radiating circuit 73 and receiving circuit 75 can be coupled to antenna 74.Each assembly of base station 70 is coupled by bus system 77, and wherein bus system 77 is except comprising data/address bus, can also comprise power bus, control bus and status signal bus in addition etc.But for the purpose of clearly demonstrating, in the drawings various bus is all designated as bus system 77.
The method that the invention described above embodiment discloses can be applied in processor 72, or is realized by processor 72.Processor 72 may be a kind of integrated circuit (IC) chip, has the disposal ability of signal.In implementation procedure, each step of said method can be completed by the instruction of the integrated logic circuit of the hardware in processor 72 or software form.Above-mentioned processor 72 can be general processor, digital signal processor (DSP), application-specific integrated circuit (ASIC) (ASIC), ready-made programmable gate array (FPGA) or other programmable logic devices, discrete gate or transistor logic, discrete hardware components.Can realize or perform disclosed each method, step and the logic diagram in the embodiment of the present invention.The processor etc. of general processor can be microprocessor or this processor also can be any routine.Step in conjunction with the method disclosed in the embodiment of the present invention directly can be presented as that hardware decoding processor is complete, or combines complete by the hardware in decoding processor and software module.Software module can be positioned at random asccess memory, flash memory, read-only memory, in the storage medium of this area maturations such as programmable read only memory or electrically erasable programmable memory, register.This storage medium is positioned at memory 71, and processor 72 reads the information in memory 71, completes the step of said method in conjunction with its hardware.
Alternatively, as an embodiment, processor 71, specifically for according to the signal receiving strength of uplink pilot signal and the transmitting power of uplink pilot signal, determines the path loss between first user equipment and base station; And bear thresholding according to path loss and default interference, determine that first user equipment performs the maximum transmission power of D2D transmission, wherein thresholding is born in interference is the maximal received power receiving D2D transmission that base station 70 can be tolerated.
Alternatively, as an embodiment, processor 71 also bears thresholding specifically for the signal receiving strength according to uplink pilot signal with the interference preset, determine whether D2D transmission causes uplink interference to the 3rd subscriber equipment, wherein thresholding is born in interference is the maximal received power receiving D2D transmission that base station 70 can be tolerated; When the signal receiving strength of uplink pilot signal be greater than or equal to interference bear thresholding time, determine that first user equipment performs the reducing amount of the transmitting power of D2D transmission.
Alternatively, uplink pilot signal comprises detection reference signal SRS or demodulated reference signal DMRS.
In the embodiment of the present invention, the method that the base station that base station 70 can perform Fig. 1 to Fig. 4 performs, the present invention does not repeat them here.
Fig. 8 is the schematic block diagram of the subscriber equipment of another embodiment of the present invention.The subscriber equipment 80 of Fig. 8 comprises processor 81 and memory 82.Processor 81 is connected by bus system 83 with memory 82.
Memory 82 is for storing the instruction making processor 81 perform following operation: receive the ascending pilot frequency resource allocation information that base station sends; Uplink pilot signal is sent according to ascending pilot frequency resource allocation information configuration concurrency, so that base station is according to the receiving intensity determination power control information of uplink pilot signal, wherein the receiving intensity equipment for indicating user 80 of the signal of uplink pilot signal and the second subscriber equipment actuating equipment transmit the interference caused the 3rd uplink between subscriber equipment and base station to equipment D2D; Receive the power control information that base station sends.
The embodiment of the present invention, by making base station according to the receiving intensity determination power control information of uplink pilot signal, to control the transmitted power that subscriber equipment 80 performs D2D transmission, thus solves the interference of D2D transmission to normal user equipments upward signal.
In addition, subscriber equipment 80 can also comprise radiating circuit 84, receiving circuit 85 and antenna 86 etc.Processor 81 controls the operation of subscriber equipment 80, and processor 81 can also be called CPU(Central Processing Unit, CPU).Memory 82 can comprise read-only memory and random access memory, and provides instruction and data to processor 81.A part for memory 82 can also comprise nonvolatile RAM (NVRAM).In concrete application, radiating circuit 84 and receiving circuit 88 can be coupled to antenna 86.Each assembly of subscriber equipment 80 is coupled by bus system 83, and wherein bus system 83 is except comprising data/address bus, can also comprise power bus, control bus and status signal bus in addition etc.But for the purpose of clearly demonstrating, in the drawings various bus is all designated as bus system 83.
The method that the invention described above embodiment discloses can be applied in processor 81, or is realized by processor 81.Processor 81 may be a kind of integrated circuit (IC) chip, has the disposal ability of signal.In implementation procedure, each step of said method can be completed by the instruction of the integrated logic circuit of the hardware in processor 81 or software form.Above-mentioned processor 81 can be general processor, digital signal processor (DSP), application-specific integrated circuit (ASIC) (ASIC), ready-made programmable gate array (FPGA) or other programmable logic devices, discrete gate or transistor logic, discrete hardware components.Can realize or perform disclosed each method, step and the logic diagram in the embodiment of the present invention.The processor etc. of general processor can be microprocessor or this processor also can be any routine.Step in conjunction with the method disclosed in the embodiment of the present invention directly can be presented as that hardware decoding processor is complete, or combines complete by the hardware in decoding processor and software module.Software module can be positioned at random asccess memory, flash memory, read-only memory, in the storage medium of this area maturations such as programmable read only memory or electrically erasable programmable memory, register.This storage medium is positioned at memory 82, and processor 81 reads the information in memory 82, completes the step of said method in conjunction with its hardware.
Alternatively, as an embodiment, ascending pilot frequency resource allocation information can comprise following at least one: the running time-frequency resource that uplink pilot signal takies; The pilot frequency sequence of uplink pilot signal; The transmitting power of uplink pilot signal.Ascending pilot frequency resource allocation information can be pre-configured by base station, is used to indicate first user equipment on specific running time-frequency resource, adopts specific pilot frequency sequence to send uplink pilot signal with specific transmitting power.
Alternatively, uplink pilot signal comprises detection reference signal SRS or demodulated reference signal DMRS.
Alternatively, subscriber equipment 80 receives the power control information that base station sends, and carries out the transmitting power adjustment of D2D transmission according to this power control information.When power control information comprises the maximum transmission power of the D2D transmission determined base station, subscriber equipment 80 guarantees that the transmitting power that D2D transmits is less than this maximum transmission power.When power control information comprises the reducing amount of the transmitting power of D2D transmission, subscriber equipment 80 adjusts current D2D transmitting power according to this reducing amount.
In the embodiment of the present invention, the method that the first user equipment (UE1) that subscriber equipment 80 can perform Fig. 2 to Fig. 4 performs, the present invention does not repeat them here.
Those of ordinary skill in the art can recognize, in conjunction with the various method steps described in embodiment disclosed herein and unit, can realize with electronic hardware, computer software or the combination of the two, in order to the interchangeability of hardware and software is clearly described, generally describe step and the composition of each embodiment in the above description according to function.These functions perform with hardware or software mode actually, depend on application-specific and the design constraint of technical scheme.Those of ordinary skill in the art can use distinct methods to realize described function to each specifically should being used for, but this realization should not thought and exceeds scope of the present invention.
The software program that the method described in conjunction with embodiment disclosed herein or step can use hardware, processor to perform, or the combination of the two is implemented.Software program can be placed in the storage medium of other form any known in random asccess memory (RAM), internal memory, read-only memory (ROM), electrically programmable ROM, electrically erasable ROM, register, hard disk, moveable magnetic disc, CD-ROM or technical field.
Although by reference to accompanying drawing and mode in conjunction with the preferred embodiments to invention has been detailed description, the present invention is not limited to this.Without departing from the spirit and substance of the premise in the present invention, those of ordinary skill in the art can carry out amendment or the replacement of various equivalence to embodiments of the invention, and these amendments or replacement all should in covering scopes of the present invention.
Claims (20)
1. avoid D2D to transmit the method causing uplink interference, it is characterized in that, comprising:
Base station sends ascending pilot frequency resource allocation information to first user equipment;
Described base station receives described first user equipment and follows the uplink pilot signal sent according to described ascending pilot frequency resource allocation information configuration concurrency;
Described base station is according to the receiving intensity determination power control information of described uplink pilot signal, and the receiving intensity of the signal of wherein said uplink pilot signal indicates described first user equipment and the second subscriber equipment actuating equipment to transmit the interference caused the uplink between the 3rd subscriber equipment and described base station to equipment D2D;
Described base station sends described power control information to described first user equipment.
2. method according to claim 1, is characterized in that, described ascending pilot frequency resource allocation information comprises following at least one:
The running time-frequency resource that described uplink pilot signal takies;
The pilot frequency sequence of described uplink pilot signal;
The transmitting power of described uplink pilot signal.
3. method according to claim 2, is characterized in that, the described signal receiving strength determination power control information according to described uplink pilot signal, comprising:
According to the signal receiving strength of described uplink pilot signal and the transmitting power of described uplink pilot signal, determine the path loss between described first user equipment and base station;
Bear thresholding according to described path loss and default interference, determine that described first user equipment performs the maximum transmission power of D2D transmission, it is the maximal received power receiving described D2D transmission that described base station can be tolerated that thresholding is born in wherein said interference.
4. method according to claim 3, it is characterized in that, describedly send described power control information to described first user equipment and comprise: send described maximum transmission power to described first user equipment, the transmitting power making described first user equipment perform D2D transmission is less than described maximum transmission power.
5. method according to claim 2, is characterized in that, the described signal receiving strength determination power control information according to described uplink pilot signal, comprising:
Signal receiving strength according to described uplink pilot signal bears thresholding with the interference preset, determine whether described D2D transmission causes uplink interference to described 3rd subscriber equipment, it is the maximal received power receiving described D2D transmission that described base station can be tolerated that thresholding is born in wherein said interference;
When the signal receiving strength of described uplink pilot signal be greater than or equal to described interference bear thresholding time, determine that described first user equipment performs the reducing amount of the transmitting power of D2D transmission.
6. method according to claim 5, it is characterized in that, describedly send described power control information to described first user equipment and comprise: the reducing amount sending the transmitting power that described D2D transmits to described first user equipment, is reduced to described interference with the transmitting power making described first user equipment perform D2D transmission and bears below thresholding.
7. method as claimed in any of claims 1 to 6, is characterized in that, described uplink pilot signal comprises detection reference signal SRS or demodulated reference signal DMRS.
8. avoid D2D to transmit the method causing uplink interference, it is characterized in that, comprising:
First user equipment receives the ascending pilot frequency resource allocation information that base station sends;
Described first user equipment send uplink pilot signal according to described ascending pilot frequency resource allocation information configuration concurrency, so that described base station is according to the receiving intensity determination power control information of described uplink pilot signal, the receiving intensity of the signal of wherein said uplink pilot signal indicates described first user equipment and the second subscriber equipment actuating equipment to transmit the interference caused the uplink between the 3rd subscriber equipment and described base station to equipment D2D;
Described first user equipment receives the described power control information that described base station sends.
9. method according to claim 8, is characterized in that, described ascending pilot frequency resource allocation information comprises following at least one:
The running time-frequency resource that described uplink pilot signal takies;
The pilot frequency sequence of described uplink pilot signal;
The transmitting power of described uplink pilot signal.
10. the method described according to Claim 8 or 9, is characterized in that, described uplink pilot signal comprises detection reference signal SRS or demodulated reference signal DMRS.
11. 1 kinds of base stations, is characterized in that, comprising:
First transmitting element, for sending ascending pilot frequency resource allocation information to first user equipment;
Receiving element, follows for receiving described first user equipment the uplink pilot signal sent according to described ascending pilot frequency resource allocation information configuration concurrency;
Determining unit, for the receiving intensity determination power control information according to described uplink pilot signal, the receiving intensity of the signal of wherein said uplink pilot signal indicates described first user equipment and the second subscriber equipment actuating equipment to transmit the interference caused the uplink between the 3rd subscriber equipment and described base station to equipment D2D;
Second transmitting element, for sending described power control information to described first user equipment.
12. base stations according to claim 11, is characterized in that, the ascending pilot frequency resource allocation information that described first transmitting element sends comprises following at least one:
The running time-frequency resource that described uplink pilot signal takies;
The pilot frequency sequence of described uplink pilot signal;
The transmitting power of described uplink pilot signal.
13. base stations according to claim 12, is characterized in that, described determining unit specifically for:
According to the signal receiving strength of described uplink pilot signal and the transmitting power of described uplink pilot signal, determine the path loss between described first user equipment and base station;
Bear thresholding according to described path loss and default interference, determine that described first user equipment performs the maximum transmission power of D2D transmission, it is the maximal received power receiving described D2D transmission that described base station can be tolerated that thresholding is born in wherein said interference.
14. base stations according to claim 13, it is characterized in that, described second transmitting element specifically for: send described maximum transmission power to described first user equipment, make described first user equipment perform D2D transmission transmitting power be less than described maximum transmission power.
15. base stations according to claim 12, is characterized in that, described determining unit specifically for:
Signal receiving strength according to described uplink pilot signal bears thresholding with the interference preset, determine whether described D2D transmission causes uplink interference to described 3rd subscriber equipment, it is the maximal received power receiving described D2D transmission that described base station can be tolerated that thresholding is born in wherein said interference;
When the signal receiving strength of described uplink pilot signal be greater than or equal to described interference bear thresholding time, determine that described first user equipment performs the reducing amount of the transmitting power of D2D transmission.
16. base stations according to claim 15, it is characterized in that, described second transmitting element specifically for: send to described first user equipment the reducing amount of transmitting power that described D2D transmits, be reduced to described interference with the transmitting power making described first user equipment perform D2D transmission and bear below thresholding.
17. according to claim 11 to the base station described in any one in 16, and it is characterized in that, described uplink pilot signal comprises detection reference signal SRS or demodulated reference signal DMRS.
18. 1 kinds of subscriber equipmenies, is characterized in that, comprising:
First receiving element, for receiving the ascending pilot frequency resource allocation information that base station sends;
Dispensing unit, for according to described ascending pilot frequency resource allocation information collocating uplink pilot signal;
Transmitting element, for sending the uplink pilot signal of described dispensing unit configuration, so that described base station is according to the receiving intensity determination power control information of described uplink pilot signal, the receiving intensity of the signal of wherein said uplink pilot signal indicates described first user equipment and the second subscriber equipment actuating equipment to transmit the interference caused the uplink between the 3rd subscriber equipment and described base station to equipment D2D;
Second receiving element, for receiving the described power control information that described base station sends.
19. subscriber equipmenies according to claim 18, is characterized in that, described ascending pilot frequency resource allocation information comprises following at least one:
The running time-frequency resource that described uplink pilot signal takies;
The pilot frequency sequence of described uplink pilot signal;
The transmitting power of described uplink pilot signal.
20., according to the subscriber equipment described in claim 18 or 19, is characterized in that, described uplink pilot signal comprises detection reference signal SRS or demodulated reference signal DMRS.
Priority Applications (2)
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| CN201310250304.9A CN104244392B (en) | 2013-06-24 | 2013-06-24 | D2D transmission is avoided to cause method, base station and the user equipment of uplink interference |
| PCT/CN2014/080557 WO2014206262A1 (en) | 2013-06-24 | 2014-06-24 | Method, base station, and user equipment for preventing d2d transmission from causing uplink interference |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310250304.9A CN104244392B (en) | 2013-06-24 | 2013-06-24 | D2D transmission is avoided to cause method, base station and the user equipment of uplink interference |
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| CN104244392A true CN104244392A (en) | 2014-12-24 |
| CN104244392B CN104244392B (en) | 2017-12-29 |
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| CN104244392B (en) | 2017-12-29 |
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