CN104349437A - Interference inhabiting method and user equipment - Google Patents

Abstract

The embodiment of the invention provides an interference inhabiting method in user equipment at a sending end and user equipment. The method comprises the following steps that the maximum available sending power is obtained; the first path loss power of at least one D2D expected link of the user equipment of the receiving end is determined, and in addition, the second path loss power of at least one interference link is determined; the estimated sending power is determined according to the first path loss power and the second path loss power; and the lower power is selected from the maximum available sending power and the estimated sending power to be used as the sending power. The sending power of the user equipment of the sending end is controlled through the method provided by the embodiment of the invention, the communication quality of the D2D expected link is ensured, and the interference of the interference link is considered, so the interference on the receiving end of other links reusing identical resource blocks by the sending end of the D2D expected link can be effectively inhabited, and the interference inhabitation capability in the D2D communication is improved.

Description

For suppressing method and the subscriber equipment of interference

Technical field

Embodiments of the present invention relate to the communications field, more specifically, relate in D2D (Device-to-Device, device-to-device), suppress interference method and subscriber equipment.

Background technology

Introducing D2D communication in a cellular communication system, is the study hotspot of the current communications field.D2D communication refers to the direct communication between two or more subscriber equipmenies.D2D communication has 4 kinds of use case, and as shown in Figure 1, example 1 is clean culture (Unicast), is that 2 subscriber equipmenies intercom mutually; Example 2 is multicast (Group-cast), and a subscriber equipment sends information to the multiple subscriber equipmenies in same member's group simultaneously; Example 3 is broadcast (Broadcast), and the while of a subscriber equipment, broadcast message gives all subscriber equipmenies in certain geographic range; Example 4 is relaying propagation (Relay), and a subscriber equipment, as relaying, relays the message of base station or the transmission of other subscriber equipmenies to another one or multiple subscriber equipment.

The introducing of D2D communication has a lot of advantage, as efficient radio resource utilization, higher spectrum efficiency, lower power consumption and community marginal user performance lifting etc.But, if the multiplexing Resource Block of cellular network of D2D communication, and according to resource allocation strategy, also may multiplexing same resource block between different D2D links, therefore, interference can be there is between D2D link and the cellular link of cellular network and between different D2D links.In order to the integrated communication quality of elevator system, need to suppress interference in D2D communication.

In existing technical scheme, continue to use the method suppressing to disturb in cellular network communication, give the method for being carried out AF panel in the D2D communication of clean culture by the transmitted power of the subscriber equipment controlling transmitting terminal.Specifically comprise: obtain maximum available launch power; A D2D between the subscriber equipment determining receiving terminal expects the path loss power of link; Determine to estimate transmitted power according to the path loss power determined; From maximum available launch power and estimation transmitted power, select less power as transmitted power.

But there are the following problems for existing technical scheme:

Owing to only determining that a D2D expects the path loss power of link, therefore interference can only be suppressed in the D2D communication of clean culture, many D2D cannot be there are to multicast, broadcast and relaying propagation etc. to expect that the D2D of links communicates and carry out AF panel, make existing technical scheme have certain use limitation.In addition, existing technical scheme only considers that D2D expects that the path loss power of link is to control the transmitted power of the subscriber equipment of transmitting terminal, ensure that D2D expects the communication quality of link, but when the subscriber equipment of transmitting terminal adopts the final transmitted power selected to send information, still there is larger interference for other D2D links of multiplexing same resource block and cellular link, interference rejection capability is poor.

Summary of the invention

For the technical problem existed in prior art, embodiments of the present invention provide a kind of for suppressing method and the subscriber equipment of interference.

According to an embodiment of the invention, provide a kind of method suppressing to disturb in the subscriber equipment of transmitting terminal.The method comprises: obtain maximum available transmit power; Determine that at least one device-to-device D2D of the subscriber equipment of receiving terminal expects the first path loss power of link, and determine the second path loss power of at least one interfering link; Determine to estimate transmitted power according to described first path loss power and described second path loss power; And select less power as transmitted power from described maximum available transmit power and described estimation transmitted power.

According to another implementation of the invention, a kind of equipment is provided.This equipment comprises: acquisition device, for obtaining maximum available transmit power; First determining device, for determining that at least one device-to-device D2D of the subscriber equipment of receiving terminal expects the first path loss power of link, and determines the second path loss power of at least one interfering link; Second determining device, estimates transmitted power for determining according to described first path loss power and described second path loss power; And choice device, for selecting less power as transmitted power from described maximum available transmit power and described estimation transmitted power.

The technical scheme of the suppression interference that embodiments of the present invention provide, is applicable to carry out AF panel in the multiple D2D such as clean culture, multicast, broadcast and relaying propagation communicate.

According to the embodiment of the present invention, expect that the first path loss power of link and the second path loss power of interfering link are determined to estimate transmitted power by D2D, thus can less power be selected as transmitted power from maximum available transmit power and estimation transmitted power, when making the subscriber equipment of transmitting terminal adopt the transmitted power selected to send information, not only ensure that D2D expects the communication quality of link, and owing to considering the interference of interfering link, thus effectively suppress D2D to expect the interference of the receiving terminal of other links of the transmitting terminal pair same resource block multiplexing with it of link, improve the ability suppressing in D2D communication to disturb.

Accompanying drawing explanation

Read the following detailed description to non-limiting embodiment by referring to accompanying drawing, other features, objects and advantages of the present invention will become more obvious.In the accompanying drawings, identical with similar Reference numeral represents same or analogous device or method step, wherein:

Fig. 1 diagrammatically illustrates the user's example in D2D communication;

Fig. 2 diagrammatically illustrates the various links in D2D communication;

Fig. 3 diagrammatically illustrates the flow chart suppressing the method disturbed in the subscriber equipment of transmitting terminal according to an embodiment of the invention;

Fig. 4 diagrammatically illustrates the block diagram of the subscriber equipment for realizing the method suppressing interference wherein according to one embodiment of the present invention.

Embodiment

Illustrative embodiments of the present invention provides the method and apparatus suppressing interference.In certain embodiments of the present invention, the power providing the subscriber equipment of the transmitting terminal based on D2D expectation link controls to suppress interference.In other execution mode of the present invention, provide and expect that the communication pattern of the subscriber equipment of the transmitting terminal of link is selected and expects that the Resource Block configuration of link suppresses interference to D2D based on D2D.

The application scenarios of illustrative embodiments of the present invention is: in D2D communication, when D2D expects that link uses identical with other D2D links with cellular link Resource Block, D2D expects that the subscriber equipment of the transmitting terminal of link is when using this Resource Block transmission information, causes interference to the same cellular link of this Resource Block transmission information and other D2D links of using.In order to ensure whole network communication quality, need such suppression interference.And, although D2D communication can the uplink resource of multiplexing cellular network and down-chain resource, but due to multiplexing uplink resource compared to multiplexed downlink resource advantageously, such as because the receiving terminal of the down link of cellular network is the subscriber equipment that position constantly changes, survey D2D more difficult to estimate expects the interference that the subscriber equipment of the transmitting terminal of link causes it, thus is difficult to carry out AF panel; The throughput of the up link of such as cellular network is less than the throughput of down link usually again, D2D communicate impact that the communication of multiplexing uplink resource on cellular network brings compared to down link Yan Geng little.Considering based on various reasons, when setting up D2D communication, being generally the uplink resource that it distributes cellular network.Therefore, illustrative embodiments of the present invention considers that D2D suppresses the problem of interference when expecting the uplink resource of the multiplexing cellular network of link.As shown in Figure 2, illustrated therein is D2D and expect link, interfering link and other D2D link and cellular link.

Each execution mode of the present invention is described in detail below in conjunction with accompanying drawing.

Fig. 3 schematically shows the flow chart suppressing the method 300 disturbed in the subscriber equipment of transmitting terminal according to an embodiment of the invention.The method can be implemented in carry out D2D communication arbitrary as in the subscriber equipment of transmitting terminal to suppress interference.

Method 300 step S301 place obtain maximum available transmit power.Wherein the subscriber equipment of transmitting terminal is subject to the impact of self communication situation, and maximum available transmit power can change, and therefore needs to obtain current maximum available transmit power.Method 300 determines that in step S302 place at least one D2D of the subscriber equipment of receiving terminal expects the first path loss power of link, and determines the second path loss power of at least one interfering link.Then, method 300 is determined to estimate transmitted power according to described first path loss power and described second path loss power in step S303 place, and from described maximum available transmit power and described estimation transmitted power, selects less power as transmitted power in step S304 place.Be understandable that, step S301 can perform before step S302, also can perform after step S302 or S303, only needed ensuring method 300 before step S304, get maximum available transmit power and estimation transmitted power.

According to one embodiment of present invention, in method 300, D2D expects that link can be one or more, depends on the D2D communication use case that the subscriber equipment of transmitting terminal adopts.Such as, in fig. 2, the subscriber equipment of transmitting terminal is A1, and it adopts the D2D communication use case of multicast, carries out D2D communicate with subscriber equipment A3, A2 and the A4 of receiving terminal, therefore, has 3 D2D to expect links.

According to an embodiment of the invention, determine in method 300 to expect that the first path loss power of link comprises at least one D2D of the subscriber equipment of receiving terminal: determine that every bar D2D of the subscriber equipment of receiving terminal expects the first estimation path loss power of link; And determine described first path loss power according to the described first estimation path loss power determined.

When every bar D2D of the subscriber equipment determining receiving terminal expects the first estimation path loss power of link, expect the subscriber equipment of receiving terminal of link due to every bar D2D and the position of the subscriber equipment of transmitting terminal constantly changes and the transmitted power of the subscriber equipment of transmitting terminal also constantly changes, every bar D2D expects that the path loss power on link is also more difficult and accurately determines.

According to an embodiment of the invention, determine that every article of D2D expects that the first estimation path loss power of link comprises processing mode (a1): determine to expect that the first estimation path loss power of link comprises to every article of D2D of the subscriber equipment of receiving terminal: the every article of D2D getting the subscriber equipment of receiving terminal expects a RSRP (the Reference Signal Receiving Power of link, Reference Signal Received Power), and determine that every article of D2D expects the first estimation path loss power of link according to a described RSRP.

After wherein a RSRP refers to that reference signal is transmitted on every article of D2D expectation link, receive received power during this reference signal.Can expect that the subscriber equipment of the receiving terminal of link adopts predetermined transmitted power (such as, maximum available transmit power) to send by every bar D2D, and receive reference signal by the subscriber equipment of transmitting terminal; Also predetermined transmitted power (such as, maximum available transmit power) can be adopted to send by the subscriber equipment of transmitting terminal, and be expected that by every bar D2D the subscriber equipment of the receiving terminal of link receives reference signal.Every article of D2D expects that the subscriber equipment of the receiving terminal of link can will receive the received power of reference signal as a RSRP, and a RSRP is sent to the subscriber equipment of transmitting terminal, makes the subscriber equipment of transmitting terminal get a RSRP.In one embodiment, a RSRP directly can be expected the first estimation path loss power of link as every article of D2D.In another embodiment, can also by modeling determine a RSRP and first to estimate between path loss power the functional relation that meets, thus carry out functional operation according to a RSRP and obtain the first estimation path loss power.

According to another implementation of the invention, determine that every bar D2D expects that the first estimation path loss power of link comprises processing mode (a2): determine the first distance between the subscriber equipment that every bar D2D expects the receiving terminal of link, and determine that every bar D2D expects that first of link estimates path loss power according to described first distance.

Wherein the subscriber equipment of transmitting terminal and every bar D2D expect the receiving terminal of link subscriber equipment between the first distance can use existing location technology to determine, location technology is as GPS (Global Positioning System, global positioning system) location technology, bluetooth location, Wi-Fi network location etc.Because the path loss on D2D expectation link and this D2D expect the distance dependent between the transmitting terminal of link and receiving terminal, therefore, the first distance can reflect that D2D expects the path loss power of link.In one embodiment, the first estimation path loss power of link directly can be expected with the every bar D2D of the first distance direct representation.In another embodiment, can also by modeling to determine between distance and path loss the functional relation that meets, thus carry out functional operation according to the first distance and obtain the first estimation path loss power.

In order to determine that every bar D2D expects the first estimation path loss power of link more accurately, according to an embodiment of the invention, determine that every bar D2D expects that the first estimation path loss power of link comprises processing mode (a3): the first reference signal that the subscriber equipment received in the first geographic range adopts the first predetermined transmitted power to send, and determine the received power of described first reference signal, the subscriber equipment known described first predetermined transmitted power in advance of wherein said transmitting terminal; According to the received power of described first predetermined transmitted power and each first reference signal, determine the D2D Actual path loss power of the link between subscriber equipment in described first geographic range and the subscriber equipment of described transmitting terminal; And expect that the D2D Actual path loss power of the subscriber equipment of each subscriber equipment in link and described transmitting terminal to expect the first estimation path loss power of link as every bar D2D using being included in described at least one D2D in the subscriber equipment in described first geographic range.

Wherein in order to make the subscriber equipment in the first geographic range adopt the first predetermined transmitted power to send the first reference signal, according to an embodiment of the invention, the subscriber equipment of transmitting terminal adopts pre-configured transmitted power broadcast to measure request, and the subscriber equipment receiving described measurement request is defined as the subscriber equipment in described first geographic range; And described first reference signal that the subscriber equipment received in described first geographic range adopts the first predetermined transmitted power to send.Wherein pre-configured transmitted power can be the maximum available transmit power of the subscriber equipment of transmitting terminal, so that the request of measuring can be broadcast to the subscriber equipment that all D2D expect the receiving terminal of link.

Also for ease of and make the subscriber equipment in the first geographic range adopt the first predetermined transmitted power to send the first reference signal, according to another implementation of the invention, after the subscriber equipment of transmitting terminal receives the measurement request that subscriber equipment in described first geographic range sends in the base station receiving community residing for the subscriber equipment of described transmitting terminal, described first reference signal that adopts the first predetermined transmitted power to send; Wherein, the geographical position of the subscriber equipment of the base station of community residing for the subscriber equipment of described transmitting terminal in advance in known described first geographic range.Request is measured in transmission in the base station of community residing for the subscriber equipment of wherein said transmitting terminal, can according to the size determination transmitted power of geographic range known in advance, thus accomplish the request of measuring to be sent to exactly the subscriber equipment in the geographic range that presets.

And in such execution mode, according to the difference of the subscriber equipment present position in the first geographic range, the mode of the base station transmission measurement request of community residing for the subscriber equipment of transmitting terminal is also different.Thus according to an embodiment of the invention, after receiving the measurement request that subscriber equipment in described first geographic range sends in the base station receiving community residing for the subscriber equipment of described transmitting terminal, described first reference signal adopting the first predetermined transmitted power to send comprises: when the subscriber equipment in described first geographic range is all positioned at the community residing for subscriber equipment of described transmitting terminal, after receiving the measurement request that subscriber equipment in described first geographic range directly sends in the base station receiving community residing for the subscriber equipment of described transmitting terminal, adopt described first reference signal that the first predetermined transmitted power sends, when subscriber equipment in described first geographic range is not all positioned at the community residing for subscriber equipment of described transmitting terminal, after receiving the measurement request that the subscriber equipment that is positioned at the community residing for described transmitting terminal in the subscriber equipment in described first geographic range directly sends in the base station receiving community residing for the subscriber equipment of described transmitting terminal, adopt described first reference signal that the first predetermined transmitted power sends, and other subscriber equipmenies received in the subscriber equipment in the first geographic range except being positioned at the community residing for described transmitting terminal send to the base station of predetermined neighbor cell in the base station receiving first community residing for the subscriber equipment of described transmitting terminal, after the measurement request forwarded by the base station of described predetermined neighbor cell again, adopt described first reference signal that the first predetermined transmitted power sends.The community residing for other subscriber equipmenies during wherein predetermined neighbor cell refers in the first geographic range subscriber equipment except being positioned at community residing for described transmitting terminal.

According to an embodiment of the invention, according to the received power of described first predetermined transmitted power and each first reference signal in above-mentioned processing mode (a3), determine the D2D Actual path loss power of the link between subscriber equipment in described first geographic range and the subscriber equipment of described transmitting terminal.In one embodiment, can with the D2D Actual path loss power of the difference of the received power of the first predetermined transmitted power and each first reference signal as the link between the subscriber equipment in described first geographic range and the subscriber equipment of described transmitting terminal.The first predetermined transmitted power that subscriber equipment wherein in each first geographic range adopts can be incomplete same, the first predetermined transmitted power that the subscriber equipment subscriber equipment that can distinguish in advance in each first geographic range of transmitting terminal adopts.

In above-mentioned processing mode (a3), can know, subscriber equipment in first geographic range comprises the subscriber equipment that D2D expects the receiving terminal of link, and the subscriber equipment of transmitting terminal also in advance known D2D expect the subscriber equipment of the receiving terminal of link, therefore, can expect that the D2D Actual path loss power of the subscriber equipment of each subscriber equipment in link and transmitting terminal to expect the first estimation path loss power of link as every bar D2D using being included in the subscriber equipment in the first geographic range at least one D2D.At this, because D2D Actual path loss power expects that transmitted power on link and received power are determined according to reference signal at D2D, indicate the path loss that D2D expects on link more accurately.Thus as every bar D2D, D2D Actual path loss power is expected that after the first estimation path loss power of link, the first estimation path loss power will be more accurate.

According to an embodiment of the invention, determine that every bar D2D expects that the first estimation path loss power of link comprises processing mode (a4): adopt the second predetermined transmitted power to send the second reference signal, and determine the received power of the subscriber equipment receiving described second reference signal; According to described second predetermined transmitted power and each received power receiving the subscriber equipment of described second reference signal, determine to each D2D Actual path loss power receiving link between the subscriber equipment of described second reference signal and the subscriber equipment of described transmitting terminal; And using in the subscriber equipment receiving described second reference signal, be included in described at least one D2D and expect that the D2D Actual path loss power of the link between each subscriber equipment of link and the subscriber equipment of described transmitting terminal expects the first estimation path loss power of link as every bar D2D.

In processing mode (a4), send reference signal by the subscriber equipment of transmitting terminal, the subscriber equipment of transmitting terminal can control the size of the second predetermined transmitted power thus the subscriber equipment controlled in certain geographic range can receive the subscriber equipment of the second reference signal.In alternative embodiments, the subscriber equipment of transmitting terminal can adopt and maximumly can send the second reference signal by power.

After the second reference signal sends by the subscriber equipment of transmitting terminal, the subscriber equipment receiving the second reference signal can determine the received power of the second reference signal.According to an embodiment of the invention, the received power of the second reference signal is directly sent to the subscriber equipment of transmitting terminal by the subscriber equipment receiving the second reference signal, or send to the base station of community residing for it, residing for it, the base station of community sends to the subscriber equipment of transmitting terminal.The subscriber equipment of transmitting terminal, after the received power receiving the second reference signal, calculates D2D Actual path loss power accordingly.According to another implementation of the invention, receive the subscriber equipment known second predetermined transmitted power in advance of the second reference signal, thus D2D Actual path loss power can be determined according to the received power of the second predetermined transmitted power and the second reference signal, and the D2D Actual path loss determined directly is sent to the subscriber equipment of transmitting terminal, or send to the base station of the community residing for it, by the base station of community, the D2D Actual path loss determined is sent to the subscriber equipment of transmitting terminal.If the base station of community is different residing for the base station of community residing for the subscriber equipment wherein receiving the second reference signal and the subscriber equipment of transmitting terminal, the base station of community residing for the subscriber equipment that the information of the subscriber equipment needing to send to transmitting terminal is sent to transmitting terminal by the base station of community residing for the subscriber equipment then receiving the second reference signal, residing for the subscriber equipment of transmitting terminal, the base station of community is transmitted to the subscriber equipment of transmitting terminal again.

In above-mentioned processing mode (a4), can know, the subscriber equipment receiving the second reference signal comprises the subscriber equipment that D2D expects the receiving terminal of link, and the subscriber equipment of transmitting terminal also in advance known D2D expect the subscriber equipment of the receiving terminal of link, therefore, can expect that the D2D Actual path loss power of the subscriber equipment of each subscriber equipment in link and transmitting terminal to expect the first estimation path loss power of link as every bar D2D using being included in the subscriber equipment receiving the second reference signal at least one D2D.In above-mentioned processing mode (4), because D2D Actual path loss power expects that transmitted power on link and received power are determined according to reference signal at D2D, indicate the path loss that D2D expects on link more accurately.Thus as every bar D2D, D2D Actual path loss power is expected that after the first estimation path loss power of link, the first estimation path loss power will be more accurate.

Can determine that every bar D2D expects the first estimation path loss power of link according to above-mentioned execution mode, the first estimation path loss power reflects that every bar D2D expects the communication conditions of link.When determining the transmitted power of the subscriber equipment of transmitting terminal in method 300, balance D2D is needed to expect the communication quality of link and the AF panel of interfering link.Thus, the first path loss power can be determined according to the first estimation path loss power determined, reflect that all D2D expect the communication conditions of link with the first path loss power.

According to an embodiment of the invention, the first estimation path loss power according to determining determines that the first path loss power comprises processing mode (b1): the first maximum estimation path loss power in the described first estimation path loss power determined is defined as described first path loss power.

Such as, the maximum that following formula is determined in the first estimation path loss power can be used:

${\mathrm{\ξ}}_{\mathrm{Desiredeffective}}^{D2D}=\max \{{\mathrm{\ξ}}_{\mathrm{Desired}{\mathrm{link}}_1}^{D2D},...,{\mathrm{\ξ}}_{\mathrm{Desired}{\mathrm{link}}_K}^{D2D}\},---\left(1\right)$

Wherein represent the linear value of the first path loss power; K represents that D2D expects the quantity of link; represent that the 1st article to K article D2D expects the linear value of the first estimation path loss power of link.

According to another implementation of the invention, the first estimation path loss power according to determining determines that the first path loss power comprises processing mode (b2): the harmonic-mean calculating the described first estimation path loss power determined, and using the harmonic-mean that calculates as described first path loss power.

Such as, following formulae discovery harmonic-mean can be used:

${\mathrm{\ξ}}_{\mathrm{Desiredeffective}}^{D2D}=\frac{1}{\frac{1}{{\mathrm{\ξ}}_{\mathrm{Desired}{\mathrm{link}}_1}^{D2D}}+...+\frac{1}{{\mathrm{\ξ}}_{\mathrm{Desired}{\mathrm{link}}_K}^{D2D}}},---\left(2\right)$

Wherein represent the linear value of the first path loss power; K represents that D2D expects the quantity of link; represent that the 1st article to K article D2D expects the linear value of the first estimation path loss power of link.

According to another execution mode of the present invention, the first estimation path loss power according to determining determines that the first path loss power comprises processing mode (b3): the linear combination mean value calculating the described first estimation path loss power determined, and using the described linear combination mean value that calculates as described first path loss power.

Such as, following formulae discovery linear combination mean value can be used:

${\mathrm{\ξ}}_{\mathrm{Desiredeffective}}^{D2D}={\mathrm{\ω}}_1\×{\mathrm{\ξ}}_{\mathrm{Desired}{\mathrm{link}}_1}^{D2D}+...+{\mathrm{\ω}}_K\×{\mathrm{\ξ}}_{\mathrm{Desired}{\mathrm{link}}_K}^{D2D},---\left(3\right)$

Wherein represent the linear value of the first path loss power; K represents that D2D expects the quantity of link; represent that the 1st article to K article D2D expects the linear value of the first estimation path loss power of link; ω ₁..., ω _kd2D for correspondence expects the weight of link, and ω ₁+ ...+ω _k=1.

The first path loss power that wherein (b1) determines ensure that D2D expects the communication of the link that communication quality is the poorest in link; (b2) the first path loss power determined has coordinated the communication quality that all D2D expect link; (b3) expect that the weight of link guarantees that different D2D expects the communication quality of link based on different D2D.Such as, can expect for the D2D with higher-priority the weight that link assignment is higher, by that analogy.

Those skilled in the art it is appreciated that, when calculating harmonic-mean and linear average, in order to the accuracy calculated, in one embodiment, the linear value of the first estimation path loss power of link calculates to need to utilize every bar D2D to expect, the linear value that the first interference path loss power obtained also is.When determining estimation transmitted power at subsequent step S303 place, can to take the logarithm value to the linear value of the first interference path loss power, obtain the logarithm expression-form (such as, in units of dB) of the power commonly used.But in some embodiments, processing mode (b1), when selecting maximum first estimation path loss power, is not restricted to and estimates the linear value of path loss power with first or logarithm value is selected.

Be understandable that, above-mentioned the first estimation path loss power according to determining determines that the process of the first path loss power is only exemplary with illustrative.Embodiments of the present invention are not limited to concrete processing mode disclosed herein.Those skilled in the art are according to the instruction of this specification, and (existing or future exploitation) method that other can be taked suitable determines the first path loss power.

Method 300 except the first path loss power of at least one D2D expectation link determining the subscriber equipment of receiving terminal, also needs the second path loss power determining at least one interfering link in step S302 place.Be understandable that, determine in step S302 place expect the first path loss power of link at least one D2D of the subscriber equipment of receiving terminal and determine to perform the second path loss power order in no particular order of at least one interfering link simultaneously or perform according to arbitrary sequencing.

When determining the second path loss power of at least one interfering link, wherein interfering link refers to that D2D expects that the subscriber equipment of the transmitting terminal of link is when transmission information expects the receiving terminal of link to D2D, causes the link of interference to other subscriber equipmenies or base station.This interfering link comprises expects by with described D2D the D2D interfering link that link uses the receiving terminal of other D2D links of same resource block and the subscriber equipment of described transmitting terminal and forms, and/or expects by with described D2D the honeycomb interfering link that link uses the subscriber equipment of the receiving terminal of the cellular link of same resource block and described transmitting terminal to form.In an exemplary embodiment of the present invention embodiment, consider that D2D expects the situation of the uplink resource of the multiplexing cellular network of link, therefore, for D2D interfering link, it is disturbed liking the subscriber equipment receiving the receiving terminal of information in this D2D interfering link; For honeycomb interfering link, it is disturbed the base station to liking receiving uplink information in cellular link.The D2D interfering link that interfering link comprises and the quantity of honeycomb interfering link are determined by the distribution condition of the uplink resource of reality.Such as, in fig. 2, the subscriber equipment A1 due to transmitting terminal adopts the Resource Block identical with cellular link with other D2D links to send information, thus the interfering link formed.D2D interfering link has 2: A1 to B1, A1 to C1; Honeycomb interfering link has 3: A1 to S1, A1 to S3, A1 to S5.

Because D2D interfering link is different with the object that the path loss of honeycomb interfering link is disturbed, the path loss power on dissimilar interfering link can be determined respectively.According to an embodiment of the invention, determine that the second path loss power of at least one interfering link comprises: the first interference path loss power determining described D2D interfering link, and/or the second interference path loss power determining described honeycomb interfering link; Described second path loss power is determined according to described first interference path loss power and/or described second interference path loss power.

The process of the first interference path loss power wherein determining D2D interfering link and the second interference path loss power determining honeycomb interfering link does not have the difference of sequencing yet, can carry out simultaneously, can carry out according to arbitrary sequencing yet.

According to an embodiment of the invention, determine that the first interference path loss power of described D2D interfering link comprises: the second estimation path loss power determining every bar D2D interfering link; And determine described first interference path loss power according to the described second estimation path loss power determined.

Because D2D interfering link and D2D expect that link is similar, be the link formed between two subscriber equipmenies, to estimate path loss power similar with determining to expect first of link by every bar D2D therefore to determine the second estimation path loss power of every bar D2D interfering link.

According to an embodiment of the invention, that determines the second estimation path loss power of every article of D2D interfering link comprises processing mode (c1): obtain the 2nd RSRP on every article of D2D interfering link, and determines the second estimation path loss power of every article of D2D interfering link according to described 2nd RSRP.

According to another implementation of the invention, that determines the second estimation path loss power of every bar D2D interfering link comprises processing mode (c2): determine and every bar D2D interfering link receiving terminal subscriber equipment between second distance, and determine the second estimation path loss power of every bar D2D interfering link according to described second distance.

Can see, above-mentioned processing mode (c1) and (c2) respectively with determine every bar D2D expect first of link estimate the processing mode (a1) of path loss power and (a2) similar, do not repeat them here.Further, in order to determine that every bar D2D expects the second estimation path loss power of link more accurately, to estimate the processing mode of path loss power similar with determining to expect first of link by every bar D2D, present invention also offers following execution modes.

According to another implementation of the invention, that determines the second estimation path loss power of every bar D2D interfering link comprises processing mode (c3): the first reference signal that the subscriber equipment received in the first geographic range adopts the first predetermined transmitted power to send, and determine the received power of described first reference signal, the subscriber equipment known described first predetermined transmitted power in advance of wherein said transmitting terminal; According to the received power of described first predetermined transmitted power and each first reference signal, determine the D2D Actual path loss power of the link between subscriber equipment in described first geographic range and the subscriber equipment of described transmitting terminal; Other subscriber equipmenies in subscriber equipment in wherein said first geographic range except being included in the subscriber equipment of described at least one D2D expectation link and the subscriber equipment composition D2D interfering link of described transmitting terminal; And the D2D Actual path loss power of every bar D2D interfering link is defined as the second estimation path loss power of every bar D2D interfering link.

Wherein to estimate the processing mode (a3) of path loss similar with determining to expect first of link by every bar D2D for above-mentioned processing mode (c3), and specific implementation can see above-mentioned processing mode (a3).But in above-mentioned processing mode (c3), other subscriber equipmenies in subscriber equipment in first geographic range except being included in the subscriber equipment of D2D expectation link are to be subject to the subscriber equipment that D2D expects the subscriber equipment interference of the transmitting terminal of link, therefore, the subscriber equipment composition D2D interfering link of these subscriber equipmenies and transmitting terminal, estimates path loss using the D2D Actual path loss power determined before as second of D2D interfering link.

According to another execution mode of the present invention, that determines the second estimation path loss power of every bar D2D interfering link comprises processing mode (c4): adopt the second predetermined transmitted power to send the second reference signal, and determine the received power of the subscriber equipment receiving described second reference signal; According to described second predetermined transmitted power and each received power receiving the subscriber equipment of described second reference signal, determine to each D2D Actual path loss power receiving link between the subscriber equipment of described second reference signal and the subscriber equipment of described transmitting terminal; Wherein receive in the subscriber equipment of described second reference signal except be included in described at least one D2D expect link subscriber equipment except other subscriber equipmenies and described transmitting terminal subscriber equipment composition D2D interfering link; And the D2D Actual path loss power of every bar D2D interfering link is defined as the second estimation path loss power of every bar D2D interfering link.

Wherein to estimate the processing mode (a4) of path loss similar with determining to expect first of link by every bar D2D for above-mentioned processing mode (c4), and specific implementation can see above-mentioned processing mode (a4).But in above-mentioned processing mode (c4), other subscriber equipmenies received except the subscriber equipment expecting link in the subscriber equipment of described second reference signal except being included in D2D are to be subject to the subscriber equipment that D2D expects the subscriber equipment interference of the transmitting terminal of link, therefore, the subscriber equipment composition D2D interfering link of these subscriber equipmenies and transmitting terminal, estimates path loss using the D2D Actual path loss power determined before as second of D2D interfering link.

Because in above-mentioned processing mode (c3) and (c4), the second estimation path loss power that the difference of transmitted power when transmitting on D2D interfering link according to reference signal and received power obtains, the second estimation path loss power determined according to above-mentioned processing mode (c3) and (c4) compare according to above-mentioned processing mode (c1) and (c2) obtain second estimate path loss power more accurate.

Can determine the second estimation path loss power of every bar D2D interfering link according to above-mentioned execution mode, the second estimation path loss power reflects the disturbance regime of every bar D2D interfering link.When determining the transmitted power of the subscriber equipment of transmitting terminal in method 300, balance D2D is needed to expect the communication quality of link and the AF panel of interfering link.Thus, the first interference path loss power can be determined according to the second estimation path loss power determined, reflect the disturbance regime of all D2D interfering links with the first interference path loss power.

According to an embodiment of the invention, the second estimation path loss power according to determining determines that the first interference path loss power comprises processing mode (d1): the second minimum estimation path loss power in the described second estimation path loss power determined is defined as described first interference path loss power.

Such as, the minimum value in the first interference path loss power can be determined with following formula:

${\mathrm{\ξ}}_{\mathrm{Interf}.\mathrm{effective}}^{D2D}=\min \{{\mathrm{\ξ}}_{\mathrm{Interf}.{\mathrm{link}}_1}^{D2D},...,{\mathrm{\ξ}}_{\mathrm{Interf}.{\mathrm{link}}_M}^{D2D}\},---\left(4\right)$

Wherein represent the linear value of the first interference path loss power; M represents the quantity of D2D interfering link; represent the 1st article of linear value to the second estimation path loss power of M article of D2D interfering link.

According to an embodiment of the invention, the second estimation path loss power according to determining determines that the first interference path loss power comprises processing mode (d2): the harmonic-mean calculating the described second estimation path loss power determined, and using the described harmonic-mean that calculates as described first interference path loss power.

Such as, following formulae discovery harmonic-mean can be used:

${\mathrm{\ξ}}_{\mathrm{Interf}.\mathrm{effective}}^{D2D}=\frac{1}{\frac{1}{{\mathrm{\ξ}}_{\mathrm{Interf}.{\mathrm{link}}_1}^{D2D}}+...+\frac{1}{{\mathrm{\ξ}}_{\mathrm{Inferf}.{\mathrm{link}}_M}^{D2D}}},---\left(5\right)$

Wherein represent the linear value of the first interference path loss power; M represents the quantity of D2D interfering link; represent the 1st article of linear value to the second estimation path loss power of M article of D2D interfering link.

According to another implementation of the invention, the second estimation path loss power according to determining determines that the first interference path loss power comprises processing mode (d3): the linear combination mean value calculating the described second estimation path loss power determined, and using the described linear combination mean value that calculates as described first interference path loss power.

Such as, following formulae discovery linear combination mean value can be used:

${\mathrm{\ξ}}_{\mathrm{Interf}.\mathrm{effective}}^{D2D}={\mathrm{\ω}}_1\×{\mathrm{\ξ}}_{\mathrm{Interf}.{\mathrm{link}}_1}^{D2D}+...+{\mathrm{\ω}}_M\×{\mathrm{\ξ}}_{\mathrm{Interf}.{\mathrm{link}}_M}^{D2D},---\left(6\right)$

Wherein represent the linear value of the first interference path loss power; M represents the quantity of D2D interfering link; represent the 1st article of linear value to the second estimation path loss power of M article of D2D interfering link; ω ₁..., ω _mfor the weight of the D2D interfering link of correspondence, and ω ₁+ ...+ω _m=1.

The first interference path loss power that wherein (d1) determines is to suppress the interference be disturbed in D2D interfering link on maximum link; (d2) the first interference path loss power determined suppresses the interference on all D2D interfering links to coordinate; (d3) interference on all D2D interfering links is suppressed based on the weight of different D2D interfering link.Such as, higher weight can be distributed for the interfering link with lower interference holding capacity, by that analogy.

Those skilled in the art it is appreciated that, when calculating harmonic-mean and linear average, in order to the accuracy calculated, in one embodiment, need to utilize the linear value of second of every bar D2D interfering link the estimation path loss power to calculate, the linear value that the first interference path loss power obtained also is.Follow-up determine the second path loss power time, can to take the logarithm value to the linear value of the first interference path loss power, obtain the logarithm expression-form (such as, in units of dB) of the power commonly used.But in some embodiments, processing mode (d1), when selecting maximum second estimation path loss power, is not restricted to and estimates the linear value of path loss power with second or logarithm value is selected.

Be understandable that, above-mentioned the second estimation path loss power according to determining determines that the process of the first interference path loss power is only exemplary with illustrative.Embodiments of the present invention are not limited to concrete processing mode disclosed herein.Those skilled in the art are according to the instruction of this specification, and (existing or future exploitation) method that other can be taked suitable determines the first interference path loss power.

Above describe the processing mode of the first interference path loss determining D2D interfering link, next will introduce the processing mode determining the second interference path loss of honeycomb interfering link.According to an embodiment of the invention, determine that the second interference path loss power of honeycomb interfering link comprises: the honeycomb Actual path loss power determining every bar honeycomb interfering link; And determine described second interference path loss power according to the described honeycomb Actual path loss power determined.

Previously mentioned when considering that D2D expects that the subscriber equipment of the transmitting terminal of link causes interference to cellular link, being disturbed object is base station in cellular link, and this base station can be macro base station or micro-base station, is determined by the actual disposition of cellular network.The usually fixing and transmitted power in position due to base station is also fixed usually, therefore more adequately can determine the honeycomb Actual path loss power of the every bar honeycomb interfering link be made up of the subscriber equipment of base station and transmitting terminal.

According to an embodiment of the invention, determine that the honeycomb Actual path loss power of every article of honeycomb interfering link comprises processing mode (e): the 3rd reference signal that the receiving terminal receiving every article of honeycomb interfering link adopts the 3rd predetermined transmitted power to send, the subscriber equipment known described 3rd predetermined transmitted power in advance of wherein said transmitting terminal; Determine the received power of described 3rd reference signal received; And the honeycomb Actual path loss power of every article of honeycomb interfering link is determined according to the received power of described 3rd reference signal received and described 3rd predetermined transmitted power.

Subscriber equipment due to transmitting terminal can obtain transmitted power and the received power of the 3rd reference signal, thus can according to the difference determination honeycomb Actual path loss power of the 3rd predetermined transmitted power of the 3rd reference signal and received power.The 3rd predetermined transmitted power that wherein receiving terminal of every article honeycomb interfering link adopts can be different, D2D expects that the subscriber equipment of the transmitting terminal of link can distinguish the 3rd predetermined transmitted power of different honeycomb interfering links in advance, thus can determine the honeycomb Actual path loss power of every bar honeycomb interfering link.

Can determine the honeycomb Actual path loss power of every bar honeycomb interference path according to above-mentioned execution mode, honeycomb Actual path loss power reflects the disturbance regime of every bar honeycomb interfering link.When determining the transmitted power of the subscriber equipment of transmitting terminal in method 300, balance D2D is needed to expect the communication quality of link and the AF panel of interfering link.Thus, the second interference path loss power can be determined according to the honeycomb Actual path loss power determined, reflect the disturbance regime of all honeycomb interfering links with the second interference path loss power.Can know, the second interference path loss power reflects the disturbance regime of honeycomb interfering link.

Because honeycomb interfering link and D2D interfering link are interfering link, according to the honeycomb Actual path loss power determined determine the second interference path loss power according to according to determine second of D2D interfering link estimate path loss power to determine the first interference path according to similar.

According to an embodiment of the invention, determine that the second interference path loss power comprises processing mode (f1) according to the honeycomb Actual path loss power determined: minimum honeycomb Actual path loss power in the described honeycomb Actual path loss power determined is defined as described second interference path loss power.

Such as, the minimum value in the second interference path loss power can be determined with following formula:

${\mathrm{PL}}_{\mathrm{Interf}.\mathrm{effective}}^{\mathrm{cellular}}=\min \{{\mathrm{PL}}_{\mathrm{Interf}.{\mathrm{link}}_1}^{\mathrm{cellular}},...,{\mathrm{PL}}_{\mathrm{Interf}.{\mathrm{link}}_N}^{\mathrm{cellular}}\},---\left(7\right)$

Wherein represent the linear value of the first interference path loss power; N represents the quantity of D2D interfering link; represent the 1st article of linear value to the honeycomb Actual path loss power of N article of honeycomb interfering link.

According to another implementation of the invention, determine that the second interference path loss power comprises processing mode (f2) according to the honeycomb Actual path loss power determined: calculate the harmonic-mean of described honeycomb Actual path loss power determined, and using the described harmonic-mean that calculates as described second interference path loss power.

Such as, following formulae discovery harmonic-mean can be used:

${\mathrm{PL}}_{\mathrm{Interf}.\mathrm{effective}}^{\mathrm{cellular}}=\frac{1}{\frac{1}{{\mathrm{PL}}_{\mathrm{Interf}.{\mathrm{link}}_1}^{\mathrm{cellular}}}+...+\frac{1}{{\mathrm{PL}}_{\mathrm{Inferf}.{\mathrm{link}}_N}^{\mathrm{cellular}}}},---\left(8\right)$

Wherein represent the linear value of the first interference path loss power; N represents the quantity of D2D interfering link; represent the 1st article of linear value to the honeycomb Actual path loss power of N article of honeycomb interfering link.

According to another execution mode of the present invention, determine that the second interference path loss power comprises processing mode (f3) according to the honeycomb Actual path loss power determined: calculate the linear combination mean value of described honeycomb Actual path loss power determined, and using the described linear combination mean value that calculates as described second interference path loss power.

Such as, following formulae discovery linear combination mean value can be used:

${\mathrm{PL}}_{\mathrm{Interf}.\mathrm{effective}}^{\mathrm{cellular}}={\mathrm{\ω}}_1\×{\mathrm{PL}}_{\mathrm{Interf}.{\mathrm{link}}_1}^{\mathrm{cellular}}+...+{\mathrm{\ω}}_N\×{\mathrm{PL}}_{\mathrm{Interf}.{\mathrm{link}}_N}^{\mathrm{cellular}},---\left(9\right)$

Wherein represent the linear value of the first interference path loss power; N represents the quantity of D2D interfering link; represent the 1st article of linear value to the honeycomb Actual path loss power of N article of honeycomb interfering link; ω ₁..., ω _nfor the weight of the honeycomb interfering link of correspondence, and ω ₁+ ...+ω _n=1

The second interference path loss power that wherein (f1) determines is to suppress the interference be disturbed in honeycomb interfering link on maximum link; (f2) the second interference path loss power determined suppresses the interference on all honeycomb interfering links to coordinate; (f3) interference on all honeycomb interfering links is suppressed based on the weight of different honeycomb interfering link.Such as, higher weight can be distributed for the interfering link with lower interference holding capacity, by that analogy.

Those skilled in the art it is appreciated that, when calculating harmonic-mean and linear average, in order to the accuracy calculated, in one embodiment, need to utilize the linear value of the honeycomb Actual path loss power of every bar honeycomb interfering link to calculate, the linear value that the second interference path loss power obtained also is.Follow-up determine the second path loss power time, can take the logarithm to the linear value of the second interference path loss power, obtain the logarithm expression-form (such as, in units of dB) of the power commonly used.But in some embodiments, processing mode (f1), when selecting maximum honeycomb Actual path loss power, is not restricted to and selects by the linear value of honeycomb Actual path loss power or logarithm value.

Be understandable that, the above-mentioned cellular pathway loss power according to determining determines that the process of the second interference path loss power is only exemplary with illustrative.Embodiments of the present invention are not limited to concrete processing mode disclosed herein.Those skilled in the art are according to the instruction of this specification, and (existing or future exploitation) method that other can be taked suitable determines the second interference path loss power.

After the second interference path loss of the first interference path loss and honeycomb interfering link of determining D2D interfering link, the second path loss power of interfering link can be determined accordingly.According to an embodiment of the invention, the first interference path loss and the second interference path loss directly can be added and obtain the second path loss power.According to another implementation of the invention, can be the first interference path loss weight different with the second interference path Loss allocation, calculate both linear combination mean value as the second path loss power.

Method 300, after step S302, proceeds to step S303.In step S303 place, determine to estimate transmitted power according to described first path loss power and described second path loss power.According to an embodiment of the invention, the first path loss power and the second path loss power directly can be added and obtain to estimate transmitted power.Alternatively, according to another implementation of the invention, be the first path loss power weight different with the second path loss power division, calculate both linear combination mean value as estimation transmitted power.

Alternatively, in other execution mode of the present invention, it is also conceivable to system parameters, determine that estimation transmitted power comprises according to described first path loss power and described second path loss power: determine described estimation transmitted power according to described first path loss power, described second path loss power and system parameters.Wherein said system parameters comprises following one or more: the Resource Block quantity that predetermined open Loop Power control parameter, described D2D expectation link has distributed, the compensation of transformat and predetermined close-loop power control parameter.These system parameterss pre-configuredly in system maybe can to obtain.In one embodiment, following example formula can be used to determine to estimate transmitted power:

$P_{\mathrm{Estimated}}=P_0+\mathrm{\α}{\stackrel{\‾}{\mathrm{\ξ}}}_{\mathrm{Desiredlink}}^{D2D}+\mathrm{\β}(\mathrm{\λ}{\stackrel{\‾}{\mathrm{\ξ}}}_{\mathrm{Interf}.\mathrm{link}}^{D2D}+\mathrm{\μ}{\stackrel{\‾}{\mathrm{PL}}}_{\mathrm{Interf}.\mathrm{link}}^{\mathrm{cellular}})+10{\log }_{10}R+{\mathrm{\Δ}}_{\mathrm{TF}}+f\left(\mathrm{\Δ}\right),---\left(9\right)$

Wherein P _estimatedrepresent estimation transmitted power, P ₀represent predetermined open Loop Power control parameter; represent the first path loss power; represent the first interference path loss power, represent the second interference path loss power, overall expression the second interference path loss power; R represents that D2D expects the Resource Block quantity that link has distributed; Δ _tFrepresent the compensation of transformat; F (Δ) represents predetermined close-loop power control parameter; α, β, λ, μ represent predetermined parameter.

In one embodiment, can be that above-mentioned formula (1) is to the linear value in (3) dB value, it can be above-mentioned formula (4) to (6) neutral line value dB value, can be that above-mentioned formula (7) is to the linear value in (9) dB value.

Be understandable that, above-mentioned formula is only the exemplary and nonrestrictive mode calculating estimation transmitted power, and embodiments of the present invention are not limited to concrete formula disclosed herein.Those skilled in the art are according to the instruction of this specification, and (existing or future exploitation) method that other can be taked suitable is determined to estimate transmitted power according to the first path loss power and the second path loss power.

Then, method 300 proceeds to step S304.In step S304 place, from described maximum available transmit power and described estimation transmitted power, select less power as transmitted power.Weigh D2D due to estimation transmitted power and expect the communication quality of link and the disturbed condition of interfering link, therefore, if when estimation transmitted power is less than maximum available transmit power, the interference produced in selecting estimation transmitted power can effectively suppress D2D to communicate as transmitted power, can also ensure that D2D expects the communication quality of link simultaneously.Certainly, if estimation transmitted power is greater than maximum available transmit power, then maximum available transmit power should be selected as transmitted power, to reach the object that balance D2D expects the communication quality of link and the AF panel of interfering link.

Said method 300 suppresses interference by the transmitted power of the subscriber equipment controlling transmitting terminal, and this is a kind of method suppressing to disturb in D2D communication process in real time.Be understandable that, said method 300 may be used for when any D2D communication as in the subscriber equipment of transmitting terminal.

But when employing method 300 suppresses interference, existed and disturb in illustrative system, if the interference on interfering link is excessive, employing method 300 also possibly cannot suppress interference effectively.Therefore, further, embodiments of the present invention give the method that some suppressed to disturb before interference produces perspectively.

According to an embodiment of the invention, before method 300, when each subscriber equipment in the subscriber equipment of described transmitting terminal and the subscriber equipment of described receiving terminal all meets D2D communication condition, set up described D2D with the subscriber equipment of described receiving terminal and expect link.In this embodiment, before expecting link establishment at D2D, first consider that D2D expects whether the transmitting terminal of link and the subscriber equipment of receiving terminal meet certain D2D communication condition, these D2D communication conditions can constrain in D2D well and expect can not produce excessive interference after link establishment, namely perspective suppress the method disturbed to use as a kind of.

Wherein when the user's example adopting multicast, broadcast or relaying relay etc. to there are many D2D expectation links, be difficult to provide suitable criterion to determine that many D2D expect that links can be set up.Therefore, in an exemplary embodiment of the present invention embodiment, consider that D2D expects that link is the situation of, i.e. the situation of man-to-man clean culture D2D communication.Below each subscriber equipment demand fulfillment in the subscriber equipment of described transmitting terminal and the subscriber equipment of described receiving terminal, D2D communication condition (g1) is to the one or more combination in (g6):

(g1) described D2D expects that the 3rd RSRP of link is more than or equal to the 4th RSRP of the link between the base station of each subscriber equipment and community residing for it.

Its conditional (g1) considers the communication quality on D2D expectation link, during the 4th RSRP of the link between the base station that the 3rd RSRP is more than or equal to each subscriber equipment and community residing for it, illustrate at D2D, each subscriber equipment expects that the communication quality on link is better than the communication quality of the base station of each subscriber equipment and community residing for it, therefore can set up D2D and expect link.

(g2) described 3rd RSRP of the first predetermined ratio be more than or equal to each subscriber equipment and and described D2D expect that link uses the 5th RSRP of the link between the receiving terminal of the cellular link of same resource block.

Its conditional (g2) considers each subscriber equipment and to be interfered the disturbed condition of link.Consider that interfering link is that each subscriber equipment and described D2D expect that link uses the link between the transmitting terminal of the cellular link of same resource block at this.If the 3rd RSRP of the first predetermined ratio is more than or equal to five RSRP of each subscriber equipment on interfering link, illustrate that interference on interfering link in allowed limits, then can set up D2D and expect link.

(g3) the 6th RSRP of the second predetermined ratio is more than or equal to described 4th RSRP, with described D2D, wherein said 6th RSRP expects that link uses the RSRP of the cellular link of same resource block.

Its conditional (g3) considers the communication quality of the cellular link in cellular network.The D2D set up expects that each subscriber equipment in link should not cause excessive interference to the communication quality of cellular link to the interference of the receiving terminal of cellular link.6th RSRP represents the communication quality of cellular link, if the 6th RSRP of the second predetermined ratio is greater than the 4th RSRP, illustrates that the D2D set up expects link to the interference of cellular link in allowed limits, then can set up D2D and expect link.

(g4) link between the base station of each subscriber equipment and community residing for it is less than the first predetermined threshold value at the CQI (Channel Quality Indicator, CQI) of scheduled duration.

Its conditional (g4) considers in scheduled duration, each subscriber equipment is the CQI of the link between the base station of community residing for it, if CQI is more than or equal to the first predetermined threshold value, the communication quality of the link between the base station that each subscriber equipment and community residing for it be described is better, then expect link without the need to setting up D2D, because set up when D2D expects link to suppress to disturb the resource distribution also needing to carry out the power as method 300 and control and provide below.If CQI is less than the first predetermined threshold value, then can sets up D2D and expect link.

(g5) described D2D expects that the quantity of the Resource Block that link distributes is less than the second predetermined threshold.

Its conditional (g5) considers the quantity that D2D expects link needs the Resource Block distributed.If D2D expects link to need the quantity of the Resource Block distributed be more than or equal to the second predetermined threshold, then expect link without the need to setting up D2D.If D2D expects that the quantity of the Resource Block that link distributes is less than the second predetermined threshold, then can set up D2D and expect link.

(g6) set up described D2D and expect that the total frequency spectrum utilance after link is more than or equal to the total frequency spectrum utilance set up before described D2D expectation link.

Its conditional (g2) considers the total frequency spectrum utilance set up before and after D2D expectation link, if total frequency spectrum utilance improves after setting up D2D expectation link, then can set up D2D and expect link.In one embodiment, total frequency spectrum utilance specifically determine that mode can with reference to following by the formula (10) that discusses in detail or (11).

In some embodiments, can arbitrary condition of each subscriber equipment demand fulfillment D2D communication condition (g1) to (g6) in the subscriber equipment of the subscriber equipment of transmitting terminal and described receiving terminal time, set up D2D and expect link.In other execution mode, when the combination in any of multiple conditions of each subscriber equipment demand fulfillment D2D communication condition (g1) to (g6) in the subscriber equipment of transmitting terminal and the subscriber equipment of described receiving terminal, D2D can be set up and expects link.

According to an embodiment of the invention, before method 300, and expecting after link at the above-mentioned D2D that sets up, needing the D2D for setting up to expect link assignment Resource Block.Can know, if D2D expect Resource Block that link distributes and other more D2D links or cellular link shared, then disturb larger in system.Therefore, in order to effectively suppress interference, consider the utilance of Resource Block simultaneously, according to an embodiment of the invention, provide the method for following Resources allocation block: before determining maximum available transmit power, for arbitrary Resource Block, when second and speed are more than or equal to first and speed, expect link to described D2D described resource block assignments.

Wherein said first and speed for be assigned to other D2D links and cellular link at described Resource Block and be not assigned to described D2D expect link time, other D2D links described and described cellular link and speed; Described second and speed for being assigned to other D2D links described and described cellular link at described Resource Block time, reallocated by described Resource Block described other D2D links, described cellular link and described D2D when expecting link to described D2D expect link and speed.

Can calculate based on the Signal to Interference plus Noise Ratio on D2D link, cellular link with speed (sum data rate) in it.But due to second and speed be by resource block assignments to D2D expect before link under such circumstances and the estimation of speed.Because now this Resource Block is not yet really assigned to D2D expectation link, actual Signal to Interference plus Noise Ratio cannot be obtained.Therefore, according to an embodiment of the invention, described first and speed be determine according to the RSRP on the RSRP of the every bar link in other D2D links described and described cellular link and interfering link thereof and speed; Described second and speed be expect every RSRP of bar link in link and the RSRP of interfering link thereof determines and speed according to other D2D links described, described cellular link and described D2D.Wherein, the RSRP of every bar link can as Signal reception power, and the summation of the RSRP on its interfering link as noise Rx power, thus estimates out second and speed.At another execution mode, noise Rx power can also comprise the received power of white Gaussian noise.

In an exemplary embodiment of the present invention embodiment, many D2D are expected that the situation of link is more difficult and determines and speed, therefore consider that D2D expects that link is the situation of at this.In one embodiment, first and speed and second and speed following formula can be adopted to calculate:

$R_{\mathrm{beforel}}=\underset{k=1}{\overset{P}{\mathrm{\Σ}}}{\log }_2(1+\frac{{\mathrm{RSRP}}_k}{\underset{i=1,i\≠k}{\overset{P}{\mathrm{\Σ}}}{\mathrm{RSRP}}_{i,k}+N_0}),---\left(10\right)$

$R_{\mathrm{after}2}=\underset{k=1}{\overset{P+1}{\mathrm{\Σ}}}{\log }_2(1+\frac{{\mathrm{RSRP}}_k}{\underset{i=1,i\≠k}{\overset{P+1}{\mathrm{\Σ}}}{\mathrm{RSRP}}_{i,k}+N_0}),---\left(11\right)$

Wherein formula (10) is for calculating first and speed, and formula (11) is for calculating second and speed.R _beforelrepresent first and speed; R _after2represent second and speed; P represents and resource block assignments is expected before link to D2D, has been assigned other D2D links of this Resource Block and the quantity of cellular link; P+1 represents that other D2D link, cellular link and the D2D being assigned this Resource Block expect the quantity of link by this resource block assignments to after D2D expectation link; RSRP _krepresent the RSRP of a kth receiving terminal on the expectation D2D link of himself; RSRP _{i, k}represent the RSRP on the link between a kth receiving terminal and i-th transmitting terminal of interfering link, i is not equal to k; N ₀represent white Gaussian noise.

Be understandable that, above-mentioned formula is only exemplary and nonrestrictive calculating first and speed and second and the mode of speed, and embodiments of the present invention are not limited to concrete formula disclosed herein.Those skilled in the art are according to the instruction of this specification, and (existing or future exploitation) method that other can be taked suitable calculates first and speed and second and speed.

Determine first and speed and second and speed after, judge first and speed and second and the size of speed, if second and speed be greater than first and speed, illustrate this resource block assignments to after D2D expectation link, can improve system and speed, then this resource block assignments can be expected link to D2D.

Fig. 4 schematically shows the block diagram of the subscriber equipment 400 for realizing the method suppressing interference wherein according to one embodiment of the present invention.In some embodiments, subscriber equipment 400 can be the equipment such as mobile phone, panel computer, portable notebook computer, above-knee notebook computer.As shown in Figure 4, acquisition device 401, for obtaining maximum available transmit power; First determining device 402, for determining that at least one device-to-device D2D of the subscriber equipment of receiving terminal expects the first path loss power of link, and determines the second path loss power of at least one interfering link; Second determining device 403, estimates transmitted power for determining according to described first path loss power and described second path loss power; And choice device 404, for selecting less power as transmitted power from described maximum available transmit power and described estimation transmitted power.

Can find out, the subscriber equipment 400 of Fig. 4 can realize as with the method shown in figure 3, although and do not illustrate further, subscriber equipment 400 can comprise more device or functional unit with all kinds of unit of each step of method described in the multiple execution modes described by the method 300 realizing composition graphs 3.

Illustrative embodiments of the present invention is described above with reference to flow chart shown in the drawings and block diagram.It should be noted that the method disclosed in embodiments of the present invention can realize in the combination of software, hardware or software and hardware.Hardware components can utilize special logic to realize; Software section can store in memory, and by suitable instruction execution system, such as microprocessor or personal computer (PC) perform.In some embodiments, the present invention is embodied as software, and it includes but not limited to firmware, resident software, microcode etc.

And embodiments of the present invention can also be taked can from the form of the computer program that computer can be used or computer-readable medium is accessed, and these media provide program code use for computer or any instruction execution system or be combined with it.For the purpose of description, computer can with or computer-readable mechanism can be any tangible device, it can comprise, store, communicate, propagate or transmission procedure with by instruction execution system, device or equipment use or be combined with it.

Medium can be electric, magnetic, light, electromagnetism, ultrared or the system of semiconductor (or device or device) or propagation medium.The example of computer-readable medium comprises 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 current CD comprises compact disk-read-only memory (CD-ROM), compact disk-read/write (CD-R/W) and DVD.

Should be noted that and provide specification of the present invention to be in order to the purpose of illustration and description, instead of be used for exhaustive or limit the invention to disclosed form.For those of ordinary skill in the art, many modifications and changes are all fine.Therefore; selecting and describing execution mode is to explain principle of the present invention and practical application thereof better; and those of ordinary skill in the art are understood, under the prerequisite not departing from essence of the present invention, all modifications and modification all fall within protection scope of the present invention defined by the claims.

Claims (24)

1. in the subscriber equipment of transmitting terminal, suppress the method disturbed, comprising:

Obtain maximum available transmit power;

Determine that at least one device-to-device D2D of the subscriber equipment of receiving terminal expects the first path loss power of link, and determine the second path loss power of at least one interfering link;

Determine to estimate transmitted power according to described first path loss power and described second path loss power; And

From described maximum available transmit power and described estimation transmitted power, select less power as transmitted power.

2. method according to claim 1, wherein determine to expect that the first path loss power of link comprises at least one D2D of the subscriber equipment of receiving terminal:

Determine that every bar D2D of the subscriber equipment of receiving terminal expects the first estimation path loss power of link; And

Described first estimation path loss power according to determining determines described first path loss power.

3. method according to claim 2, wherein determine to expect that the first estimation path loss power of link comprises to every bar D2D of the subscriber equipment of receiving terminal:

The every bar D2D getting the subscriber equipment of receiving terminal expects the first Reference Signal Received Power RSRP of link, and determines that every article of D2D expects the first estimation path loss power of link according to a described RSRP; Or

Determine the first distance between the subscriber equipment that every bar D2D expects the receiving terminal of link, and determine that every bar D2D expects the first estimation path loss power of link according to described first distance.

4. method according to claim 2, wherein determine to expect that the first estimation path loss power of link comprises to every bar D2D of the subscriber equipment of receiving terminal:

The first reference signal that the subscriber equipment received in the first geographic range adopts the first predetermined transmitted power to send, and determine the received power of described first reference signal, the subscriber equipment known described first predetermined transmitted power in advance of wherein said transmitting terminal;

According to the received power of described first predetermined transmitted power and each first reference signal, determine the D2D Actual path loss power of the link between subscriber equipment in described first geographic range and the subscriber equipment of described transmitting terminal; And

Expect that the D2D Actual path loss power of the subscriber equipment of each subscriber equipment in link and described transmitting terminal to expect the first estimation path loss power of link as every bar D2D using being included in described at least one D2D in the subscriber equipment in described first geographic range.

5. method according to claim 2, wherein determine to expect that the first estimation path loss power of link comprises to every bar D2D of the subscriber equipment of receiving terminal:

Adopt the second predetermined transmitted power to send the second reference signal, and determine the received power of the subscriber equipment receiving described second reference signal;

According to described second predetermined transmitted power and each received power receiving the subscriber equipment of described second reference signal, determine to each D2D Actual path loss power receiving link between the subscriber equipment of described second reference signal and the subscriber equipment of described transmitting terminal; And

Using in the subscriber equipment receiving described second reference signal, be included in described at least one D2D and expect that the D2D Actual path loss power of the link between each subscriber equipment of link and the subscriber equipment of described transmitting terminal expects the first estimation path loss power of link as every bar D2D.

6. the method any one of claim 2 to 5 described in claim, wherein determine that described first path loss power comprises according to the described first estimation path loss power determined:

The first maximum estimation path loss power in the described first estimation path loss power determined is defined as described first path loss power;

Calculate the harmonic-mean of the described first estimation path loss power determined, and using the harmonic-mean that calculates as described first path loss power; Or

Calculate the linear combination mean value of the described first estimation path loss power determined, and using the described linear combination mean value that calculates as described first path loss power.

7. method according to claim 1, wherein said interfering link comprises expects by with described D2D the D2D interfering link that link uses the receiving terminal of other D2D links of same resource block and the subscriber equipment of described transmitting terminal and forms, and/or expect by with described D2D the honeycomb interfering link that link uses the subscriber equipment of the receiving terminal of the cellular link of same resource block and described transmitting terminal to form

Wherein determine that the second path loss power of at least one interfering link comprises:

Determine the first interference path loss power of described D2D interfering link, and/or determine the second interference path loss power of described honeycomb interfering link;

Described second path loss power is determined according to described first interference path loss power and/or described second interference path loss power.

8. method according to claim 7, wherein determine that the first interference path loss power of described D2D interfering link comprises:

Determine the second estimation path loss power of every bar D2D interfering link; And

Described second estimation path loss power according to determining determines described first interference path loss power.

9. method according to claim 8, wherein determine that the second estimation path loss power of every bar D2D interfering link comprises:

Obtain the 2nd RSRP on every article of D2D interfering link, and determine the second estimation path loss power of every article of D2D interfering link according to described 2nd RSRP; Or

Determine and every bar D2D interfering link receiving terminal subscriber equipment between second distance, and determine the second estimation path loss power of every bar D2D interfering link according to described second distance.

10. method according to claim 8, wherein determine that the second estimation path loss power of every bar D2D interfering link comprises:

The first reference signal that the subscriber equipment received in the first geographic range adopts the first predetermined transmitted power to send, and determine the received power of described first reference signal, the subscriber equipment known described first predetermined transmitted power in advance of wherein said transmitting terminal;

According to the received power of described first predetermined transmitted power and each first reference signal, determine the D2D Actual path loss power of the link between subscriber equipment in described first geographic range and the subscriber equipment of described transmitting terminal;

Other subscriber equipmenies in subscriber equipment in wherein said first geographic range except being included in the subscriber equipment of described at least one D2D expectation link and the subscriber equipment composition D2D interfering link of described transmitting terminal; And

The D2D Actual path loss power of every bar D2D interfering link is defined as the second estimation path loss power of every bar D2D interfering link.

11. methods according to claim 8, wherein determine that the second estimation path loss power of every bar D2D interfering link comprises:

Adopt the second predetermined transmitted power to send the second reference signal, and determine the received power of the subscriber equipment receiving described second reference signal;

According to described second predetermined transmitted power and each received power receiving the subscriber equipment of described second reference signal, determine to each D2D Actual path loss power receiving link between the subscriber equipment of described second reference signal and the subscriber equipment of described transmitting terminal;

Wherein receive in the subscriber equipment of described second reference signal except be included in described at least one D2D expect link subscriber equipment except other subscriber equipmenies and described transmitting terminal subscriber equipment composition D2D interfering link; And

The D2D Actual path loss power of every bar D2D interfering link is defined as the second estimation path loss power of every bar D2D interfering link.

Method any one of 12. according to Claim 8 to 11 described in claim, wherein determine that the first interference path loss power comprises according to the described second estimation path loss power determined:

The second minimum estimation path loss power in the described second estimation path loss power determined is defined as described first interference path loss power;

Calculate the harmonic-mean of the described second estimation path loss power determined, and using the described harmonic-mean that calculates as described first interference path loss power; Or

Calculate the linear combination mean value of the described second estimation path loss power determined, and using the described linear combination mean value that calculates as described first interference path loss power.

13. methods according to claim 7, wherein determine that the second interference path loss power of described honeycomb interfering link comprises:

Determine the honeycomb Actual path loss power of every bar honeycomb interfering link; And

Described honeycomb Actual path loss power according to determining determines described second interference path loss power.

14. methods according to claim 13, wherein determine that the honeycomb Actual path loss power of every bar honeycomb interfering link comprises:

The 3rd reference signal that the receiving terminal receiving every article of honeycomb interfering link adopts the 3rd predetermined transmitted power to send, the subscriber equipment known described 3rd predetermined transmitted power in advance of wherein said transmitting terminal;

Determine the received power of described 3rd reference signal received; And

The honeycomb Actual path loss power of every article of honeycomb interfering link is determined according to the received power of described 3rd reference signal received and described 3rd predetermined transmitted power.

15. methods according to claim 13 or 14, wherein determine that described second interference path loss power comprises according to the described honeycomb Actual path loss power determined:

Minimum honeycomb Actual path loss power in the described honeycomb Actual path loss power determined is defined as described second interference path loss power;

Calculate the harmonic-mean of described honeycomb Actual path loss power determined, and using the described harmonic-mean that calculates as described second interference path loss power; Or

Calculate the linear combination mean value of described honeycomb Actual path loss power determined, and using the described linear combination mean value that calculates as described second interference path loss power.

16. methods according to claim 4 or 10, the first reference signal that the subscriber equipment wherein received in the first geographic range adopts the first predetermined transmitted power to send comprises:

Adopt pre-configured transmitted power broadcast to measure request, and the subscriber equipment receiving described measurement request is defined as the subscriber equipment in described first geographic range; And

Described first reference signal that the subscriber equipment received in described first geographic range adopts the first predetermined transmitted power to send.

17. methods according to claim 4 or 10, the first reference signal that the subscriber equipment wherein received in the first geographic range adopts the first predetermined transmitted power to send comprises:

After receiving the measurement request that subscriber equipment in described first geographic range sends in the base station receiving community residing for the subscriber equipment of described transmitting terminal, described first reference signal that adopts the first predetermined transmitted power to send;

Wherein, the geographical position of the subscriber equipment of the base station of community residing for the subscriber equipment of described transmitting terminal in advance in known described first geographic range.

18. methods according to claim 17, after wherein receiving the measurement request that subscriber equipment in described first geographic range sends in the base station receiving community residing for the subscriber equipment of described transmitting terminal, described first reference signal that adopts the first predetermined transmitted power to send comprises:

When subscriber equipment in described first geographic range is all positioned at the community residing for subscriber equipment of described transmitting terminal, after receiving the measurement request that subscriber equipment in described first geographic range directly sends in the base station receiving community residing for the subscriber equipment of described transmitting terminal, described first reference signal that adopts the first predetermined transmitted power to send;

When subscriber equipment in described first geographic range is not all positioned at the community residing for subscriber equipment of described transmitting terminal, after receiving the measurement request that the subscriber equipment that is positioned at the community residing for described transmitting terminal in the subscriber equipment in described first geographic range directly sends in the base station receiving community residing for the subscriber equipment of described transmitting terminal, adopt described first reference signal that the first predetermined transmitted power sends, and other subscriber equipmenies received in the subscriber equipment in the first geographic range except being positioned at the community residing for described transmitting terminal send to the base station of predetermined neighbor cell in the base station receiving first community residing for the subscriber equipment of described transmitting terminal, after the measurement request forwarded by the base station of described predetermined neighbor cell again, adopt described first reference signal that the first predetermined transmitted power sends.

19. methods according to claim 1, wherein determine that estimation transmitted power comprises according to described first path loss power and described second path loss power:

Described estimation transmitted power is determined according to described first path loss power, described second path loss power and system parameters;

Wherein said system parameters comprises following one or more: the Resource Block quantity that predetermined open Loop Power control parameter, described D2D expectation link has distributed, the compensation of transformat and predetermined close-loop power control parameter.

20. methods according to claim 1, wherein before determining maximum available transmit power, when each subscriber equipment in the subscriber equipment of described transmitting terminal and the subscriber equipment of described receiving terminal all meets D2D communication condition, set up described D2D with the subscriber equipment of described receiving terminal and expect link.

21. methods according to claim 20, wherein said D2D expects that link is one, and each subscriber equipment in the subscriber equipment of described transmitting terminal and the subscriber equipment of described receiving terminal meets the one or more combination in following D2D communication condition:

Described D2D expects that the 3rd RSRP of link is more than or equal to the 4th RSRP of the link between the base station of each subscriber equipment and community residing for it;

Described 3rd RSRP of the first predetermined ratio be more than or equal to each subscriber equipment and and described D2D expect that link uses the 5th RSRP of the link between the receiving terminal of the cellular link of same resource block;

6th RSRP of the second predetermined ratio is more than or equal to described 4th RSRP, with described D2D, wherein said 6th RSRP expects that link uses the RSRP of the cellular link of same resource block;

Link between the base station of each subscriber equipment and community residing for it is less than the first predetermined threshold value in the channel quality indicator CQI of scheduled duration;

Described D2D expects that the quantity of the Resource Block that link distributes is less than the second predetermined threshold;

Set up described D2D and expect that the total frequency spectrum utilance after link is more than or equal to the total frequency spectrum utilance set up before described D2D expectation link.

22. methods according to claim 1, before determining maximum available transmit power, for arbitrary Resource Block, when second and speed are more than or equal to first and speed, expect link to described D2D described resource block assignments;

Wherein said first and speed for be assigned to other D2D links and cellular link at described Resource Block and be not assigned to described D2D expect link time, other D2D links described and described cellular link and speed; Described second and speed for being assigned to other D2D links described and described cellular link at described Resource Block time, reallocated by described Resource Block described other D2D links, described cellular link and described D2D when expecting link to described D2D expect link and speed.

23. methods according to claim 22, wherein, described D2D expects that link is one, described first and speed be determine according to the RSRP on the RSRP of the every bar link in other D2D links described and described cellular link and interfering link thereof and speed; Described second and speed be expect every RSRP of bar link in link and the RSRP of interfering link thereof determines and speed according to other D2D links described, described cellular link and described D2D.

24. 1 kinds of subscriber equipmenies, comprising:

Acquisition device, for obtaining maximum available transmit power;

First determining device, for determining that at least one device-to-device D2D of the subscriber equipment of receiving terminal expects the first path loss power of link, and determines the second path loss power of at least one interfering link;

Second determining device, estimates transmitted power for determining according to described first path loss power and described second path loss power; And

Choice device, for selecting less power as transmitted power from described maximum available transmit power and described estimation transmitted power.