CN107360544A - The position of mobile equipment control method and device of dynamic noise based on Signal to Interference plus Noise Ratio - Google Patents

The position of mobile equipment control method and device of dynamic noise based on Signal to Interference plus Noise Ratio Download PDF

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Publication number
CN107360544A
CN107360544A CN201710542121.2A CN201710542121A CN107360544A CN 107360544 A CN107360544 A CN 107360544A CN 201710542121 A CN201710542121 A CN 201710542121A CN 107360544 A CN107360544 A CN 107360544A
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capacity
signal
mobile device
communication system
secrecy
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CN201710542121.2A
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CN107360544B (en
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谢宁
梁远
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Shenzhen University
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Shenzhen University
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/02—Services making use of location information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
    • H04K3/00—Jamming of communication; Counter-measures
    • H04K3/40—Jamming having variable characteristics
    • H04K3/43—Jamming having variable characteristics characterized by the control of the jamming power, signal-to-noise ratio or geographic coverage area
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
    • H04K3/00—Jamming of communication; Counter-measures
    • H04K3/80—Jamming or countermeasure characterized by its function
    • H04K3/82—Jamming or countermeasure characterized by its function related to preventing surveillance, interception or detection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W40/00—Communication routing or communication path finding
    • H04W40/02—Communication route or path selection, e.g. power-based or shortest path routing
    • H04W40/12—Communication route or path selection, e.g. power-based or shortest path routing based on transmission quality or channel quality
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W40/00—Communication routing or communication path finding
    • H04W40/02—Communication route or path selection, e.g. power-based or shortest path routing
    • H04W40/20—Communication route or path selection, e.g. power-based or shortest path routing based on geographic position or location
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/18—TPC being performed according to specific parameters
    • H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
    • H04W52/241—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters taking into account channel quality metrics, e.g. SIR, SNR, CIR, Eb/lo
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/38—TPC being performed in particular situations
    • H04W52/46—TPC being performed in particular situations in multi hop networks, e.g. wireless relay networks
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Abstract

The invention provides a kind of position of mobile equipment control method and device of the dynamic noise based on Signal to Interference plus Noise Ratio, this method includes：Determine communication system (n+1) time slot the first secrecy capacity relative to communication system the second secrecy capacity of nth slot the first variation tendency, determine first eavesdropping capacity of the mobile device in (n+1) time slot relative to mobile device in the second of nth slot the second variation tendency for eavesdropping capacity, determine Signal to Interference plus Noise Ratio SINR of the mobile device in same time received signal, according to the first variation tendency, the second variation tendency and SINR, the transimission power of adjustment target end equipment transmission people's work noise signal；According to the first variation tendency, to mobile device send feedback information.The embodiment of the present invention can control the shift position of mobile device according to feedback information, meanwhile, further optimize the secrecy capacity of communication system by adaptively adjusting the power of man made noise's signal, be continued for secure communication.

Description

The position of mobile equipment control method and device of dynamic noise based on Signal to Interference plus Noise Ratio
Technical field
The present invention relates to communication technical field, more particularly to the position of mobile equipment control of the dynamic noise based on Signal to Interference plus Noise Ratio Method and device processed.
Background technology
The convenience brought with radio communication, people in daily life will largely using wireless network carry out it is sensitive and Private information transmits.Conventional wireless network ensures the security of information by higher-layer encryption technology, and it assumes that eavesdropping end (is moved Dynamic equipment) computing capability be limited.However, with the high speed development of Distributed Calculation, the computing capability for eavesdropping end is continuous Improve, this hypothesis has become more and more unreliable.And safety of physical layer technology is of increased attention, it is utilized Legal target end equipment has more preferable signal receiving quality (such as signal to noise ratio) than eavesdropping end, to ensure the security of communication, Avoid relying on the limited hypothesis of eavesdropping end computing capability.
Collaboration communication method is mainly comprising the side such as relay selection and cooperation man made noise in existing safety of physical layer technology Method.Relay selection can be by choosing set objective end " by force " transmission link and into eavesdropping end " weak " transmission link After improving secrecy capacity.However, also there is open defect, such as the performance of relay selection method in existing collaboration communication method It is limited to the locus of relaying.
The content of the invention
The embodiment of the invention discloses the position of mobile equipment control method and device of the dynamic noise based on Signal to Interference plus Noise Ratio, The shift position of mobile device can be controlled according to feedback information, meanwhile, by the work(for adaptively adjusting man made noise's signal Rate further optimizes the secrecy capacity of communication system, is continued for secure communication.
First aspect of the embodiment of the present invention discloses a kind of position of mobile equipment control of dynamic noise based on Signal to Interference plus Noise Ratio Method, the target end equipment included applied to communication system, the communication system also include the mobile device and source equipment, Methods described includes：
When determining first secrecy capacity of the communication system in (n+1) time slot relative to the communication system n-th First variation tendency of the second secrecy capacity of gap, wherein, second secrecy capacity be the communication system in nth slot most Good secrecy capacity, (n+1) time slot are current time slots, and the nth slot is a upper time slot for the current time slots, The n is positive integer；
When determining first eavesdropping capacity of the mobile device in (n+1) time slot relative to the mobile device n-th Gap second eavesdropping capacity the second variation tendency, wherein, it is described second eavesdropping capacity be the mobile device in nth slot most Good eavesdropping capacity；
Signal to Interference plus Noise Ratio SINR of the mobile device in same time received signal is determined, wherein, the movement is set It is standby to include coming from man made noise's signal of the target end equipment in same time received signal and come from the source The useful signal of end equipment；
According to first variation tendency, second variation tendency and the SINR, the target end equipment is adjusted Transmit the transimission power of man made noise's signal；
According to first variation tendency, to the mobile device send feedback information, to control the mobile device Shift position, the feedback information are used for the secrecy capacity lifting for representing the communication system or declined.
As an alternative embodiment, in first aspect of the embodiment of the present invention, methods described also includes：
Compare the size of first secrecy capacity and second secrecy capacity, by first secrecy capacity with it is described The larger secrecy capacity of numerical value is defined as the communication system in the optimal secrecy appearance of (n+1) time slot in second secrecy capacity Amount；And
Compare it is described first eavesdropping capacity with described second eavesdropping capacity size, will described first eavesdrop capacity with it is described The larger eavesdropping capacity of numerical value is defined as the communication system in the optimal eavesdropping appearance of (n+1) time slot in second eavesdropping capacity Amount；
The communication system is preserved in the optimal secrecy capacity of (n+1) time slot and the communication system at (n+1) The optimal eavesdropping capacity of time slot.
As an alternative embodiment, in first aspect of the embodiment of the present invention, it is described according to the described first change Trend, second variation tendency and the SINR, adjust the biography that the target end equipment transmits man made noise's signal Defeated power includes：
If first variation tendency represents the secrecy capacity lifting of the communication system, it is determined that
If first variation tendency represents that the secrecy capacity of the communication system is not lifted, and second variation tendency Represent that the eavesdropping capacity of the mobile device does not decline, it is determined that
If first variation tendency represents that the secrecy capacity of the communication system is not lifted, and second variation tendency Represent that the eavesdropping capacity of the mobile device declines, it is determined that
Wherein, the PD(n+1) it is biography of the target end equipment in man made noise's signal described in (n+1) slot transmission Defeated power, the PD(n) transimission power of man made noise's signal is transmitted in nth slot for the target end equipment；It is described γR(n+1) for the mobile device in the SINR of (n+1) time slot received signal, the γR(n) it is the mobile device In the SINR of nth slot received signal, the α is modifying factor and is fixed value.
As an alternative embodiment, in first aspect of the embodiment of the present invention, it is described to determine the communication system (n+1) time slot the first secrecy capacity relative to the communication system nth slot the second secrecy capacity first become Before change trend, methods described also includes：
Artificial noise signal is sent to the mobile device；
The process signal of the mobile device forwarding is received, the process signal is that the mobile device is manually made an uproar described Acoustical signal and the signal after the useful signal that the same time receives from the source equipment is handled；
The useful signal is obtained from the process signal.
Second aspect of the embodiment of the present invention discloses a kind of position of mobile equipment control of dynamic noise based on Signal to Interference plus Noise Ratio Method, the mobile device included applied to communication system, the communication system also includes source equipment and target end equipment, described Method includes：
The useful signal and the artificial of target end equipment transmission that the source equipment transmission is received in the same time are made an uproar Acoustical signal；
The useful signal and man made noise's signal are handled, obtain process signal, and the processing is believed Number it is transmitted to the target end equipment；
Receive the target end equipment and be directed to the feedback information that the process signal returns, the feedback information is used to represent The secrecy capacity lifting of the communication system declines；
Shift position is determined according to the eavesdropping capacity of the feedback information and the mobile device, and from the mobile device The position being presently in is moved to the shift position.
As an alternative embodiment, in second aspect of the embodiment of the present invention, it is described according to the feedback information Determine that shift position includes with the eavesdropping capacity of the mobile device：
If the feedback information is used for the secrecy capacity lifting for representing the communication system, and the eavesdropping of the mobile device Capacity does not decline, and current moving step length is increased into the first moving step length；The position being presently according to the mobile device And first moving step length, determine shift position；
If the feedback information is used to represent that the secrecy capacity of the communication system to decline, current moving step length is reduced To the second moving step length；The position being presently according to the mobile device and second moving step length, it is determined that mobile position Put.
The third aspect of the embodiment of the present invention discloses a kind of position of mobile equipment control device, runs on what communication system included Target end equipment, including：
Determining unit, for determining first secrecy capacity of the communication system in (n+1) time slot relative to described logical Letter system the second secrecy capacity of nth slot the first variation tendency, wherein, second secrecy capacity is the communication system System is current time slots in the optimal secrecy capacity of nth slot, (n+1) time slot, and the nth slot is the current time slots A upper time slot, the n is positive integer；
The determining unit, be additionally operable to determine the mobile device (n+1) time slot the first eavesdropping capacity relative to The mobile device nth slot second eavesdrop capacity the second variation tendency, wherein, it is described second eavesdropping capacity be described Mobile device is in the optimal eavesdropping capacity of nth slot；
The determining unit, it is additionally operable to obtain Signal to Interference plus Noise Ratio of the mobile device in same time received signal SINR, wherein, the mobile device includes coming from manually making an uproar for the target end equipment in same time received signal Acoustical signal and the useful signal for coming from the source equipment；
Adjustment unit, for according to first variation tendency, second variation tendency and the SINR, adjusting institute State the transimission power that target end equipment transmits man made noise's signal；
First transmitting element, for according to first variation tendency, to the mobile device send feedback information, with control Make the shift position of the mobile device, the feedback information be used for the secrecy capacity lifting for representing the communication system or under Drop.
As an alternative embodiment, in the third aspect of the embodiment of the present invention, the position of mobile equipment control Device also includes：
Compare determining unit, for the size of first secrecy capacity and second secrecy capacity, by described in The first secrecy capacity secrecy capacity larger with numerical value in second secrecy capacity is defined as the communication system at (n+1) The optimal secrecy capacity of time slot；
The relatively determining unit, the size of the first eavesdropping capacity described in comparison and the described second eavesdropping capacity is additionally operable to, The described first eavesdropping capacity eavesdropping capacity larger with numerical value in the described second eavesdropping capacity is defined as into the communication system to exist The optimal eavesdropping capacity of (n+1) time slot；
Storage unit, for preserving the communication system in the optimal secrecy capacity of (n+1) time slot and the communication System is in the optimal eavesdropping capacity of (n+1) time slot.
As an alternative embodiment, in the third aspect of the embodiment of the present invention, the adjustment unit is according to First variation tendency, second variation tendency and the SINR, adjust the target end equipment and transmit the man made noise The mode of the transimission power of signal is specially：
If first variation tendency represents the secrecy capacity lifting of the communication system, it is determined that
If first variation tendency represents that the secrecy capacity of the communication system is not lifted, and second variation tendency Represent that the eavesdropping capacity of the mobile device does not decline, it is determined that
If first variation tendency represents that the secrecy capacity of the communication system is not lifted, and second variation tendency Represent that the eavesdropping capacity of the mobile device declines, it is determined that
Wherein, the PD(n+1) it is biography of the target end equipment in man made noise's signal described in (n+1) slot transmission Defeated power, the PD(n) transimission power of man made noise's signal is transmitted in nth slot for the target end equipment；It is described γR(n+1) for the mobile device in the SINR of (n+1) time slot received signal, the γR(n) it is the mobile device In the SINR of nth slot received signal, the α is modifying factor and is fixed value.
As an alternative embodiment, in the third aspect of the embodiment of the present invention, the position of mobile equipment control Device also includes：
Second transmitting element, for determining that the communication system is protected the first of (n+1) time slot in the determining unit Close capacity relative to the communication system before the first variation tendency of the second secrecy capacity of nth slot, to the movement Equipment sends man made noise's signal；
Receiving unit, for receiving the process signal of the mobile device forwarding, the process signal is that the movement is set It is standby by man made noise's signal and the letter after the useful signal that the same time receives from the source equipment is handled Number；
Acquiring unit, for obtaining the useful signal from the process signal.
The aspect of the embodiment of the present invention four discloses a kind of position of mobile equipment control device, runs on the shifting that communication system includes Dynamic equipment, including：
Receiving unit, for receiving useful signal and the target end equipment that the source equipment is sent in the same time Man made noise's signal of transmission；
Transmitting element is handled, for the useful signal and man made noise's signal to be handled, obtains processing letter Number, and the process signal is transmitted to the target end equipment；
The receiving unit, it is additionally operable to receive the feedback information that the target end equipment is directed to process signal return, The feedback information is used for the secrecy capacity lifting for representing the communication system or declined；
Determining unit, for determining shift position according to the eavesdropping capacity of the feedback information and the mobile device；
Mobile unit, for being moved to the shift position from the position that the mobile device is presently in.
As an alternative embodiment, in fourth aspect of the embodiment of the present invention, the determining unit is according to The eavesdropping capacity of feedback information and the mobile device determines that the mode of shift position is specially：
If the feedback information is used for the secrecy capacity lifting for representing the communication system, and the eavesdropping of the mobile device Capacity does not decline, and current moving step length is increased into the first moving step length；The position being presently according to the mobile device And first moving step length, determine shift position；
If the feedback information is used to represent that the secrecy capacity of the communication system to decline, current moving step length is reduced To the second moving step length；The position being presently according to the mobile device and second moving step length, it is determined that mobile position Put.
Compared with prior art, the embodiment of the present invention possesses following beneficial effect：
In the embodiment of the present invention, target end equipment can determine first secrecy of the communication system in (n+1) time slot Capacity in the first variation tendency of the second secrecy capacity of nth slot, and determines the movement relative to the communication system Equipment eavesdrops the of capacity relative to the mobile device in the first eavesdropping capacity of (n+1) time slot the second of nth slot Two variation tendencies, further, target end equipment determine that the mobile device dry is made an uproar in the letter of same time received signal After SINR, target end equipment can according to first variation tendency, second variation tendency and the SINR, The transimission power that the target end equipment transmits man made noise's signal is adjusted, and according to first variation tendency, to institute Mobile device send feedback information is stated, to control the shift position of the mobile device.It can be seen that implement the embodiment of the present invention, mesh Marking end equipment can be according to the variation tendency of the secrecy capacity of communication system (lifting declines), the eavesdropping capacity of mobile device Variation tendency (lifting declines) and mobile device carry out adaptive adjust manually in the SINR of same time received signal The power of noise signal, and the shift position of mobile device is controlled according to feedback information, meanwhile, it is artificial by adaptively adjusting The power of noise signal further optimizes the secrecy capacity of communication system, is continued for secure communication.
Brief description of the drawings
Technical scheme in order to illustrate the embodiments of the present invention more clearly, it will use below required in embodiment Accompanying drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the present invention, for ability For the those of ordinary skill of domain, on the premise of not paying creative work, it can also be obtained according to these accompanying drawings other attached Figure.
Fig. 1 is a kind of model of communication system schematic diagram disclosed in the embodiment of the present invention；
Fig. 2 is a kind of position of mobile equipment controlling party of the dynamic noise based on Signal to Interference plus Noise Ratio disclosed in the embodiment of the present invention The schematic flow sheet of method；
Fig. 3 is the position of mobile equipment control of dynamic noise of the another kind disclosed in the embodiment of the present invention based on Signal to Interference plus Noise Ratio The schematic flow sheet of method；
Fig. 4 is the position of mobile equipment control of dynamic noise of the another kind disclosed in the embodiment of the present invention based on Signal to Interference plus Noise Ratio The schematic flow sheet of method；
Fig. 5 is a kind of message capacity disclosed in the embodiment of the present invention, secrecy capacity, the convergence graph for eavesdropping capacity；
Fig. 6 is a kind of structural representation of position of mobile equipment control device disclosed in the embodiment of the present invention；
Fig. 7 is the structural representation of another position of mobile equipment control device disclosed in the embodiment of the present invention；
Fig. 8 is the structural representation of another position of mobile equipment control device disclosed in the embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.Based on this Embodiment in invention, the every other reality that those of ordinary skill in the art are obtained under the premise of creative work is not made Example is applied, belongs to the scope of protection of the invention.
It should be noted that the term " first " in description and claims of this specification and above-mentioned accompanying drawing and " Two " etc. be to be used to distinguish different objects, rather than for describing particular order.In addition, term " comprising " and " having " and it Any deformation, it is intended that cover non-exclusive include.Such as contain the process of series of steps or unit, method, be The step of system, product or equipment are not limited to list or unit, but alternatively also including the step of not listing or list Member, or alternatively also include for the intrinsic other steps of these processes, method, product or equipment or unit.
The embodiment of the invention discloses the position of mobile equipment control method and device of the dynamic noise based on Signal to Interference plus Noise Ratio, The power of man made noise's signal can adaptively be adjusted more neatly to control the shift position of mobile device, it is further excellent Change the secrecy capacity of communication system, be continued for secure communication.Accompanying drawing is combined below to be described in detail.
Fig. 1 is referred to, Fig. 1 is a kind of model of communication system schematic diagram disclosed in the embodiment of the present invention.As shown in figure 1, The communication system includes source equipment S, mobile device R and target end equipment D, optionally, can also include interception facility E.
Wherein, source equipment S be mainly used in send useful signal, source equipment S can include but is not limited to base station with And user equipment.Base station (such as access point) can refer in access network in the air on interface by one or more sectors and nothing The equipment of line terminal communication.Base station can be used for mutually being changed the air frame received and IP packets, as wireless terminal and Router between the remainder of access network, wherein, the remainder of access network may include Internet protocol (IP) network.Base station The attribute management to air interface can also be coordinated.For example, base station can be base station (BTS, Base in GSM or CDMA Transceiver Station) or WCDMA in base station (NodeB), can also be the evolved base station in LTE (NodeB or eNB or e-NodeB, evolutional Node B), the embodiment of the present invention does not limit.User equipment can wrap Include but be not limited to smart mobile phone, notebook computer, personal computer (Personal Computer, PC), personal digital assistant (Personal Digital Assistant, PDA), mobile internet device (Mobile Internet Device, MID), Wearable device (such as intelligent watch, Intelligent bracelet, intelligent glasses) each class of electronic devices, wherein, the operation system of the user equipment System may include but be not limited to Android operation system, IOS, Symbian (Saipan) operating system, Black Berry (blackberry, blueberry) operating system, Windows Phone8 operating systems etc., the embodiment of the present invention does not limit.
Wherein, mobile device R be with signal forwarding capability and the equipment that can be moved in certain altitude, can include but It is not limited to unmanned plane, aircraft, satellite etc..
Wherein, target end equipment D is mainly used in receiving and transmitting signal, for example sends artificial noise signal and receive useful signal Deng target end equipment D can include but is not limited to base station and user equipment.
Wherein, interception facility E is mainly used in receiving the signal that mobile device R is sent, and interception facility E can be included but not It is limited to base station, user equipment, communication truck etc..
Communication system shown in Fig. 1 is applied to the wireless relay collaborative network of double bounce, in Fig. 1, three is established by origin of O Dimension space coordinate system, wherein being set comprising two surface units (a source equipment S and a target end equipment D) and a movement Standby R.All equipment is all only equipped with single antenna, and source equipment S is communicated by mobile device R help with target end equipment D. Therefore, our S → R are referred to as the first jump communication, and R → D is that the second jump communicates.In first jumps communication, d1It is source equipment S and shifting Corresponding direct path distance between dynamic equipment R, l1And l2Be between source equipment S and mobile device R corresponding reflection path away from From.In second jumps communication, d2It is corresponding direct path distance, l between mobile device R and target end equipment D3And l4It is to move Move reflection path distance corresponding between equipment R and target end equipment D.In fig. 1, it is assumed that source equipment S and target end equipment D Between because of the influence of path loss or shadow effect direct path is not present, and the letter that mobile device R will can be intercepted Breath is inerrably transmitted to interception facility E.
Wherein, mobile device R may belong to a heterogeneous network and possess different safety inspections, mobile device R mono- Denier, which starts, may steal signal when forward signal is helped.In this scene, although in the process of signal transmission In need mobile device R to help forward signal, but for secure communication, it is desirable to which the signal of source equipment S transport is to moving It is secrecy for dynamic equipment R.
It should be noted that model of communication system shown in Fig. 1 especially suitable for source equipment S energy constraint but still The scene that need to be securely communicated by mobile device R, such as, disaster area, source equipment S transmission energy is relatively small (may be damaged), but target end equipment D also has sufficient energy back information.
In Fig. 1, mobile device R will be normally at a higher height, and the transmission of signal depends on ground Reflection.And traditional cellular communication model is only absorbed in the covering of ground aspect without for the vertical channel on height Sufficiently exact characteristic description is provided.Therefore, in the present invention, selection is based on height and distance (height and distance- Dependent mobile relay channel model), it is built upon on the basis of two footpath propagation models and considers antenna performance The channel model of mobile relay, therefore the vertical channel characteristic on height can be described exactly, rather than only close Note in covered ground.This mobile relay channel model can be described as：
Wherein, d is the distance between two communication equipments, l1And l2It is the distance of reflection path respectively, Δ φ is the phase of signal Potential difference.From formula (1), it can be seen that path loss L definition is to be based on transmitted signal wavelengths λ, the direct projection road of height correlation Footpath antenna gain Gl(h), the reflection path antenna gain G of height correlationr(h), the propagation coefficient γ (h) of height correlation and ground Reflectance factor ε.Propagation coefficient γ (h) is defined as：
Wherein, htIt is the height of sender, hrIt is the height and γ of recipient0It is the attenuation coefficient of maximum possible.Height phase The direct path antenna gain G of passl(h) can be expressed as：
And the reflection path antenna gain G of height correlationr(h) can be expressed as：
Wherein, ht,cIt is a height threshold and G0It is the channel gain of different channels model.
In the communication system shown in Fig. 1, source equipment S and target end equipment D can send to mobile device R and believe simultaneously Number, wherein, what source equipment S was sent is useful signal, and what target end equipment D was sent is man made noise's signal, and mobile device R connects After receiving useful signal and man made noise's signal, processing is amplified to useful signal and man made noise's signal, and will processing Signal afterwards is transmitted to target end equipment D, and target end equipment D cans obtain useful signal from the signal after the processing, entered One step, variation tendency (lifting declines) that target end equipment D can be according to the secrecy capacity of communication system, mobile device R Eavesdropping capacity variation tendency (lifting or decline) and mobile device come from the SINR of same time received signal The power of adjustment man made noise's signal is adapted to, meanwhile, target end equipment D can also be sent to mobile device R for representing communication The secrecy capacity lifting of system or the feedback information declined, after mobile device R receives the feedback information, it is possible to anti-according to this Feedforward information determines shift position, and the position being presently in from mobile device is moved to shift position, so as to more flexible Ground control mobile device R shift position, further optimizes the secrecy capacity of communication system, secure communication is constantly entered OK.
Referring to Fig. 2, Fig. 2 is a kind of mobile device of the dynamic noise based on Signal to Interference plus Noise Ratio disclosed in the embodiment of the present invention The schematic flow sheet of position control method.Wherein, it is somebody's turn to do the position of mobile equipment control method of the dynamic noise based on Signal to Interference plus Noise Ratio Applied to target end equipment, as shown in Fig. 2 should the position of mobile equipment control method of dynamic noise based on Signal to Interference plus Noise Ratio can be with Comprise the following steps：
Step 201, target end equipment send man made noise's signal to the mobile device.
In the embodiment of the present invention, it is assumed that target end equipment sends man made noise's signal x to the mobile deviceD, mesh Mark end equipment and transmit man made noise's signal xDTransimission power be PD, wherein, the target end equipment and the mobile device Between transmit man made noise's signal xDCaused path loss
Wherein, described (n+1) time slot is current time slots, and the nth slot is a upper time slot for the current time slots, The n is positive integer.
Step 202, target end equipment receive the process signal of the mobile device forwarding.
Wherein, the process signal be the mobile device by man made noise's signal with the same time from the source The useful signal that end equipment receives handled after signal.
Assuming that the source equipment sends useful signal x to the mobile deviceS.The source equipment transmission is described useful Signal xSTransimission power be PS, wherein, the useful signal x is transmitted between the source equipment and the mobile deviceSProduced Raw path loss
The signal that the mobile device receives is
Wherein, η1(n+1) represent that average is that zero variance is N01Multiple Gauss noise.
Because the mobile device R is using the mode of amplification forwarding, therefore the mobile device will can receive Signal yR(n+1) an amplification factor W (n+1) is multiplied by, is then forwarded to target end equipment D.
The process signal that target end equipment D is received is：
Wherein,Represent the mobile device R and institute State and transmit the process signal y between source equipmentD(n+1) path loss caused by, η2(n+1) represent that average is zero variance For N02Multiple Gauss noise.
Step 203, target end equipment obtain the useful signal from the process signal.
In the embodiment of the present invention, by the man made noise's signal x itself sent out known to target end equipment DD, therefore, target End equipment D can remove the interference x to itselfD, obtaining the useful signal is：
Step 204, target end equipment determine first secrecy capacity of the communication system in (n+1) time slot relative to institute State first variation tendency of the communication system in the second secrecy capacity of nth slot.
In the embodiment of the present invention, target end equipment can be calculated between the useful signal received and man made noise's signal Signal to Interference plus Noise Ratio (SINR, Signal to Interference plus Noise Ratio) is
Amplification factor W (n+1) can be defined as：
Target end equipment can determine message capacity
Wherein, the message capacity can represent the mutual information between source equipment S and target end equipment D.
SINR between useful signal and man made noise's signal that mobile device receives can be expressed as
Mobile device can determine to eavesdrop capacity
Wherein, eavesdropping capacity can be expressed as the mutual information between source equipment S and mobile device R.
Target end equipment determines first secrecy capacity of the communication system in (n+1) time slot
Cs(n+1)=[CD(n+1)-CR(n+1)]+(15),
Wherein,
Wherein, second secrecy capacity is the communication system in the optimal secrecy capacity of nth slot.Target end equipment Determine the communication system after first secrecy capacity of (n+1) time slot, it is possible to by first secrecy capacity with it is described Communication system is compared in the second secrecy capacity of nth slot, to determine the communication system the first of (n+1) time slot Secrecy capacity relative to the communication system the second secrecy capacity of nth slot the first variation tendency.Wherein, first change The secrecy capacity rising or the secrecy capacity of the communication system that change trend can be including the communication system are constant or described logical The secrecy capacity of letter system declines.
Step 205, target end equipment determine first eavesdropping capacity of the mobile device in (n+1) time slot relative to institute Mobile device is stated in the second of nth slot the second variation tendency for eavesdropping capacity.
Wherein, the second eavesdropping capacity is the mobile device in the optimal eavesdropping capacity of nth slot.Target end equipment The mobile device can be obtained from mobile device and eavesdrops capacity the first of (n+1) time slot, or, target end equipment can To pass through γDAnd L (n)R,D(n) first eavesdropping capacity of the mobile device in (n+1) time slot is calculated.
Target end equipment determines the communication system after the first eavesdropping capacity of (n+1) time slot, it is possible to by this First eavesdropping capacity is compared with second eavesdropping capacity of the communication system in nth slot, to determine the communication system The second of capacity is eavesdropped in the first eavesdropping capacity of (n+1) time slot the second of nth slot relative to the communication system to become Change trend.Wherein, second variation tendency can include the eavesdropping capacity of the communication system and rise or the communication system Eavesdrop that capacity is constant or the eavesdropping capacity of the communication system declines.
Step 206, target end equipment determine Signal to Interference plus Noise Ratio of the mobile device in same time received signal SINR。
Wherein, the mobile device includes coming from the artificial of the target end equipment in same time received signal Noise signal and the useful signal for coming from the source equipment.Letter of the mobile device in same time received signal The dry SINR to make an uproar than SINR between useful signal and man made noise's signal, as shown in formula (13).
Step 207, target end equipment according to first variation tendency, second variation tendency and the SINR, Adjust the transimission power that the target end equipment transmits man made noise's signal.
Specifically, target end equipment is adjusted according to first variation tendency, second variation tendency and the SINR The transimission power that the whole target end equipment transmits man made noise's signal includes：
If first variation tendency represents the secrecy capacity lifting of the communication system, it is determined that
If first variation tendency represents that the secrecy capacity of the communication system is not lifted, and second variation tendency Represent that the eavesdropping capacity of the mobile device does not decline, it is determined that
If first variation tendency represents that the secrecy capacity of the communication system is not lifted, and second variation tendency Represent that the eavesdropping capacity of the mobile device declines, it is determined that
Wherein, the PD(n+1) it is biography of the target end equipment in man made noise's signal described in (n+1) slot transmission Defeated power, the PD(n) transimission power of man made noise's signal is transmitted in nth slot for the target end equipment；It is described γR(n+1) for the mobile device in the SINR of (n+1) time slot received signal, the γR(n) it is the mobile device In the SINR of nth slot received signal, the α is modifying factor and is fixed value.
Specific algorithm is as follows：
Step 208, target end equipment are according to first variation tendency, to the mobile device send feedback information, with Control the shift position of the mobile device.
Wherein, the feedback information is used for the secrecy capacity lifting for representing the communication system or declined.The feedback letter Breath includes positive and negative feedforward information or negative-feedback information, if the secrecy capacity lifting of the communication system, target device can be to shifting Dynamic equipment sends 1bit positive and negative feedforward information, if the secrecy capacity of the communication system declines, target device can be to movement Equipment sends 1bit negative-feedback information, wherein, target end equipment only needs to feed back the feedback information of a bit, can save network Resource.
The size of step 209, target end equipment first secrecy capacity and second secrecy capacity, by described in The first secrecy capacity secrecy capacity larger with numerical value in second secrecy capacity is defined as the communication system at (n+1) The optimal secrecy capacity of time slot.
In the embodiment of the present invention, the secrecy capacity and eavesdropping capacity that are stored in the internal memory of target end equipment are all optimal , i.e., described second secrecy capacity is the communication system in the optimal secrecy capacity of nth slot；Described second, which eavesdrops capacity, is The mobile device is in the optimal eavesdropping capacity of nth slot.
Target end equipment needs secrecy capacity optimal in real-time update internal memory and optimal eavesdropping capacity, optimal secrecy The renewal rule of capacity is：
CS,best(n+1)=max (CS,best(n),CS(n+1))
The rule that optimal eavesdropping capacity updates is：
CR,best(n+1)=max (CR,best(n),CR(n+1))
According to the renewal of above-mentioned optimal secrecy capacity rule, target end equipment need first secrecy capacity with The size of second secrecy capacity, the larger secrecy of numerical value in first secrecy capacity and second secrecy capacity is held Amount is defined as the communication system in the optimal secrecy capacity of (n+1) time slot.
The size of step 210, target the end equipment first eavesdropping capacity and the described second eavesdropping capacity, by described in The first eavesdropping capacity eavesdropping capacity larger with numerical value in the described second eavesdropping capacity is defined as the communication system at (n+1) The optimal eavesdropping capacity of time slot.
According to the renewal rule of above-mentioned optimal eavesdropping capacity, target end equipment need the first eavesdropping capacity with The size of the second eavesdropping capacity, the eavesdropping larger with numerical value in the described second eavesdropping capacity of the described first eavesdropping capacity is held Amount is defined as the communication system in the optimal eavesdropping capacity of (n+1) time slot.
Step 211, target end equipment preserve the communication system in the optimal secrecy capacity of (n+1) time slot and described Communication system is in the optimal eavesdropping capacity of (n+1) time slot.
In the method described by Fig. 2, target end equipment can determine the communication system the first of (n+1) time slot Secrecy capacity relative to the communication system the second secrecy capacity of nth slot the first variation tendency, and determine described in Mobile device eavesdrops capacity relative to the mobile device in the first eavesdropping capacity of (n+1) time slot the second of nth slot The second variation tendency, further, target end equipment determines letter of the mobile device in same time received signal Dry to make an uproar than after SINR, target end equipment can is according to first variation tendency, second variation tendency and described SINR, adjusts the transimission power that the target end equipment transmits man made noise's signal, and according to first variation tendency, To the mobile device send feedback information, to control the shift position of the mobile device.Implement it can be seen that implementing the present invention Example, target end equipment can be according to the eavesdroppings of variation tendency (lifting declines), mobile device of the secrecy capacity of communication system The variation tendency (lifting declines) and mobile device of capacity are adaptively adjusted in the SINR of same time received signal The power of work of giving sb. a hard time noise signal, and the shift position of mobile device is controlled according to feedback information, meanwhile, by adaptively adjusting The power of work of giving sb. a hard time noise signal further optimizes the secrecy capacity of communication system, is continued for secure communication.
Referring to Fig. 3, the movement that Fig. 3 is dynamic noise of the another kind disclosed in the embodiment of the present invention based on Signal to Interference plus Noise Ratio is set The schematic flow sheet of standby position control method.Wherein, it is somebody's turn to do the position of mobile equipment controlling party of the dynamic noise based on Signal to Interference plus Noise Ratio Method is applied to mobile device, as shown in figure 3, should the position of mobile equipment control method of dynamic noise based on Signal to Interference plus Noise Ratio can be with Comprise the following steps：
Step 301, mobile device receive useful signal and the destination end that the source equipment is sent in the same time Man made noise's signal that equipment is sent.
Where it is assumed that send useful signal x to mobile device in source equipment described in the same timeSSet with the destination end It is standby to send artificial noise signal x to mobile deviceD.The signal that mobile device receives is described in formula (7)
Step 302, mobile device are handled the useful signal and man made noise's signal, obtain processing letter Number, and the process signal is transmitted to the target end equipment.
Wherein, mobile device is handled the useful signal and man made noise's signal, is obtained process signal and is Described in formula (8)
Step 303, mobile device receive the target end equipment and are directed to the feedback information that the process signal returns.
Wherein, after the target end equipment receives the process signal, it may be determined that the communication system is at (n+1) First secrecy capacity of time slot relative to the communication system the second secrecy capacity of nth slot the first variation tendency, and According to first variation tendency, to the mobile device send feedback information, wherein, the feedback information is used to represent described The secrecy capacity lifting of communication system declines.The feedback information includes positive and negative feedforward information or negative-feedback information, if described The secrecy capacity lifting of communication system, target device can send 1bit positive and negative feedforward information to mobile device, if described logical The secrecy capacity of letter system declines, and target device can send 1bit negative-feedback information to mobile device.
Step 304, mobile device determine shift position according to the eavesdropping capacity of the feedback information and the mobile device, And it is moved to the shift position from the position that the mobile device is presently in.
Specifically, mobile device determines that shift position is wrapped according to the eavesdropping capacity of the feedback information and the mobile device Include：
If the feedback information is used for the secrecy capacity lifting for representing the communication system, and the eavesdropping of the mobile device Capacity does not decline, and current moving step length is increased into the first moving step length；The position being presently according to the mobile device And first moving step length, determine shift position；
If the feedback information is used to represent that the secrecy capacity of the communication system to decline, current moving step length is reduced To the second moving step length；The position being presently according to the mobile device and second moving step length, it is determined that mobile position Put.
Wherein, it is necessary to enter in the case of secrecy capacity lifting of the feedback information for representing the communication system One step judges to accumulate whether positive feedback counter exceedes accumulation positive feedback counter threshold, if so, then perform it is described will be current Moving step length increase to the first moving step length；Equally, the secrecy for being used to represent the communication system in the feedback information is held , it is necessary to determine whether to accumulate whether negative-feedback counter exceedes accumulation negative-feedback counter threshold in the case that amount declines, if It is that what then execution was described is decreased to the second moving step length by current moving step length.Wherein, in order to avoid the positive serious offense of moving step length It hurry up, it is also necessary to which positive feedback counter threshold Dynamic gene goes adjustment accumulation positive feedback counter threshold.
Illustrate specific as follows：
The initialization of relevant parameter can be carried out first, it is assumed that initial positions of the R (x (0), y (0)) as mobile device R, Dynamic gene ξ (0)=0, when initial, optimal secrecy capacity C are setS,best=0 and optimal eavesdropping capacity C (0)R,best(0) =0.
Specifically, corresponding algorithm is as follows：
Wherein, CNFor continuous negative-feedback counter, CPTo accumulate positive feedback counter, CT1For feedback counter threshold value, CT2 For negative-feedback counter threshold, ΔTFor positive feedback counter threshold Dynamic gene, δ0(n+1) it is moving step length, RIIncrease for step-length The big factor, RDReduce the factor for step-length.
Mobile device determines that next shift position of the mobile device is R (x (n+2), y (n+ according to the feedback information 2))=Rbest(x (n+1), y (n+1))+ξ (n+1)+δ (n+1), further, mobile device can be moved to R (x (n+2), y The location of (n+2)).
Wherein, the method described by implementing Fig. 3, mobile device can receive the useful of source equipment transmission in the same time Man made noise's signal that signal and target end equipment are sent, further, useful signal and man made noise's signal are handled, Process signal is obtained, and process signal is sent to after target end equipment, it is possible to receives target end equipment and believes for processing Number return feedback information, shift position is determined according to feedback information, and be moved to from the position that mobile device is presently in Dynamic position, so as to optimize the secrecy capacity of communication system by neatly controlling the position of mobile device.
Referring to Fig. 4, the movement that Fig. 4 is dynamic noise of the another kind disclosed in the embodiment of the present invention based on Signal to Interference plus Noise Ratio is set The schematic flow sheet of standby position control method.Wherein, it is somebody's turn to do the position of mobile equipment controlling party of the dynamic noise based on Signal to Interference plus Noise Ratio Method describes from source equipment, mobile device and the side of target end equipment three, and the part or all of step in Fig. 4 can join According to the description in Fig. 2 or Fig. 3, will not be repeated here.As shown in figure 4, it is somebody's turn to do the mobile device of the dynamic noise based on Signal to Interference plus Noise Ratio Position control method may comprise steps of：
Step 401, source equipment send useful signal to mobile device.
Step 402, target end equipment send artificial noise signal to mobile device.
Wherein, step 401 occurs simultaneously with step 402.
Step 403, mobile device are handled the useful signal and man made noise's signal, obtain processing letter Number.
Process signal is transmitted to the target end equipment by step 404, mobile device.
Step 405, target end equipment obtain the useful signal from the process signal.
Step 406, target end equipment determine first secrecy capacity of the communication system in (n+1) time slot relative to institute State first variation tendency of the communication system in the second secrecy capacity of nth slot.
Step 407, target end equipment determine first eavesdropping capacity of the mobile device in (n+1) time slot relative to institute Mobile device is stated in the second of nth slot the second variation tendency for eavesdropping capacity.
Step 408, target end equipment obtain Signal to Interference plus Noise Ratio of the mobile device in same time received signal SINR。
Step 409, target end equipment according to first variation tendency, second variation tendency and the SINR, Adjust the transimission power that the target end equipment transmits man made noise's signal.
The size of step 410, target end equipment first secrecy capacity and second secrecy capacity, by described in The first secrecy capacity secrecy capacity larger with numerical value in second secrecy capacity is defined as the communication system at (n+1) The optimal secrecy capacity of time slot.
The size of step 411, target the end equipment first eavesdropping capacity and the described second eavesdropping capacity, by described in The first eavesdropping capacity eavesdropping capacity larger with numerical value in the described second eavesdropping capacity is defined as the communication system at (n+1) The optimal eavesdropping capacity of time slot.
Step 412, target end equipment preserve the communication system in the optimal secrecy capacity of (n+1) time slot and described Communication system is in the optimal eavesdropping capacity of (n+1) time slot.
Step 413, target end equipment are according to first variation tendency, to the mobile device send feedback information.
Step 414, mobile device determine shift position according to the eavesdropping capacity of the feedback information and the mobile device, And it is moved to the shift position from the position that the mobile device is presently in.
Please also refer to Fig. 5, Fig. 5 is that a kind of message capacity disclosed in the embodiment of the present invention, secrecy capacity and eavesdropping are held The convergence graph of amount.Wherein, source equipment S location coordinate is located at (- 1000m, 1000m, 10m), target end equipment D position coordinates It is located at (1000m, -1000m, 10m), carrier frequency f is arranged to 2020MHz, and mobile device R height is set to h=100m.Manually The initial value of the transimission power of noise signal is arranged to 0.5W, N01=N02=-80dBm, ground reflection coefficent ε=0.5 and decline Factor gamma0=3.5, step-length enhancement factor RI=1.2, step-length reduces factor RD=0.7, positive feedback counter threshold CT1=2, bear Feedback counter threshold value CT2=5, positive feedback counter threshold Dynamic gene ΔT=1, α=0.829, R original position for (- 1500m, -1000m, 100m), initial step length δ0(0)=80m.CDRepresent message capacity, CSRepresent secrecy capacity, CRRepresent eavesdropping Capacity.As shown in figure 5, man made noise's signal is introduced, adaptive adjustment adjustment PDSize confuse mobile device R, communication system System is improving secrecy capacity CSWhile, eavesdropping capacity C is not sacrificedR, so as to allow mobile device R fully to trust communication system, It is continued for secure communication.
Wherein, the method described by Fig. 4 is implemented, target end equipment can become according to the change of the secrecy capacity of communication system Gesture (lifting declines), the variation tendency (lifting declines) for eavesdropping capacity of mobile device and mobile device are in the same time The SINR of received signal adaptively adjusts the power of man made noise's signal, and controls mobile device according to feedback information Shift position, meanwhile, by adaptively adjust the power of man made noise's signal come further optimize the secrecy of communication system hold Amount, is continued for secure communication.
Referring to Fig. 6, Fig. 6 is a kind of structural representation of position of mobile equipment control device disclosed in the embodiment of the present invention Figure.Wherein, the position of mobile equipment control device described by Fig. 6 can be used for performing dry making an uproar based on believing described by Fig. 2 or Fig. 4 Part or all of step in the position of mobile equipment control method of the dynamic noise of ratio, specifically refers to the phase in Fig. 2 or Fig. 4 Description is closed, will not be repeated here.Wherein, the destination end that the position of mobile equipment control device runs on communication system and included is set It is standby.As shown in fig. 6, the position of mobile equipment control device can include：
Determining unit 601, for determining first secrecy capacity of the communication system in (n+1) time slot relative to described Communication system the second secrecy capacity of nth slot the first variation tendency, wherein, second secrecy capacity is the communication System is current time slots in the optimal secrecy capacity of nth slot, (n+1) time slot, when the nth slot is described current A upper time slot for gap, the n are positive integer；
The determining unit 601, it is additionally operable to determine that the mobile device is relative in the first eavesdropping capacity of (n+1) time slot In the mobile device in the second of nth slot the second variation tendency for eavesdropping capacity, wherein, the second eavesdropping capacity is institute Mobile device is stated in the optimal eavesdropping capacity of nth slot；
The determining unit 601, it is additionally operable to determine that the mobile device dry is made an uproar in the letter of same time received signal Than SINR, wherein, the mobile device includes coming from the artificial of the target end equipment in same time received signal Noise signal and the useful signal for coming from the source equipment；
Adjustment unit 602, for according to first variation tendency, second variation tendency and the SINR, adjusting The whole target end equipment transmits the transimission power of man made noise's signal；
First transmitting element 603, for according to first variation tendency, to the mobile device send feedback information, To control the shift position of the mobile device, the feedback information be used for the secrecy capacity lifting for representing the communication system or Decline.
Specifically, the adjustment unit 602 is according to first variation tendency, second variation tendency and described SINR, the mode for adjusting the transimission power that the target end equipment transmits man made noise's signal are specially：
If first variation tendency represents the secrecy capacity lifting of the communication system, it is determined that
If first variation tendency represents that the secrecy capacity of the communication system is not lifted, and second variation tendency Represent that the eavesdropping capacity of the mobile device does not decline, it is determined that
If first variation tendency represents that the secrecy capacity of the communication system is not lifted, and second variation tendency Represent that the eavesdropping capacity of the mobile device declines, it is determined that
Wherein, the PD(n+1) it is biography of the target end equipment in man made noise's signal described in (n+1) slot transmission Defeated power, the PD(n) transimission power of man made noise's signal is transmitted in nth slot for the target end equipment；It is described γR(n+1) for the mobile device in the SINR of (n+1) time slot received signal, the γR(n) it is the mobile device In the SINR of nth slot received signal, the α is modifying factor and is fixed value.
Wherein, the position of mobile equipment control device described by Fig. 6 is implemented, can be according to the secrecy capacity of communication system Variation tendency (lifting declines), the variation tendency (lifting declines) for eavesdropping capacity of mobile device and mobile device are same The SINR of one time received signal carrys out the adaptive power for adjusting man made noise's signal, and is moved according to feedback information to control The shift position of dynamic equipment, meanwhile, further optimize communication system by adaptively adjusting the power of man made noise's signal Secrecy capacity, it is continued for secure communication.
Referring to Fig. 7, Fig. 7 is the structural representation of another position of mobile equipment control device disclosed in the embodiment of the present invention Figure.Wherein, the position of mobile equipment control device described by Fig. 7 can be used for performing dry making an uproar based on believing described by Fig. 2 or Fig. 4 Part or all of step in the position of mobile equipment control method of the dynamic noise of ratio, specifically refers to the phase in Fig. 2 or Fig. 4 Description is closed, will not be repeated here.Wherein, the destination end that the position of mobile equipment control device runs on communication system and included is set It is standby.Wherein, it is excellent to be that position of mobile equipment control device as shown in Figure 6 is carried out for the position of mobile equipment control device shown in Fig. 7 Change what is obtained.Compared with the position of mobile equipment control device shown in Fig. 6, the position of mobile equipment control device shown in Fig. 7 is also It can include：
Compare determining unit 604, for the size of first secrecy capacity and second secrecy capacity, by institute State the first secrecy capacity secrecy capacity larger with numerical value in second secrecy capacity and be defined as the communication system in (n+ 1) the optimal secrecy capacity of time slot；
The relatively determining unit 604, it is additionally operable to the first eavesdropping capacity described in comparison and eavesdrops the big of capacity with described second It is small, the described first eavesdropping capacity eavesdropping capacity larger with numerical value in the described second eavesdropping capacity is defined as the communication system In the eavesdropping capacity that (n+1) time slot is optimal；
Storage unit 605, for preserving the communication system in the optimal secrecy capacity of (n+1) time slot and described logical Letter system is in the optimal eavesdropping capacity of (n+1) time slot.
Optionally, the position of mobile equipment control device shown in Fig. 7 can also include：
Second transmitting element 606, for determining the communication system the first of (n+1) time slot in the determining unit Secrecy capacity relative to the communication system before the first variation tendency of the second secrecy capacity of nth slot, to the shifting Dynamic equipment sends man made noise's signal；
Receiving unit 607, for receiving the process signal of the mobile device forwarding, the process signal is the movement Equipment is by man made noise's signal and after the useful signal that the same time receives from the source equipment is handled Signal；
Acquiring unit 608, for obtaining the useful signal from the process signal.
Wherein, implement the position of mobile equipment control device described by Fig. 7, can adaptively adjust man made noise's signal Power more neatly controls the shift position of mobile device, the reception processing signal and from process signal from mobile device Useful signal is obtained, realizes secure communication.Additionally it is possible to real-time update and preserve secrecy capacity and the shifting of communication system The eavesdropping capacity of dynamic equipment.
Referring to Fig. 8, Fig. 8 is the structural representation of another position of mobile equipment control device disclosed in the embodiment of the present invention Figure.Wherein, the position of mobile equipment control device described by Fig. 8 can be used for performing dry making an uproar based on believing described by Fig. 3 or Fig. 4 Part or all of step in the position of mobile equipment control method of the dynamic noise of ratio, specifically refers to the phase in Fig. 3 or Fig. 4 Description is closed, will not be repeated here.Wherein, the position of mobile equipment control device runs on the mobile device that communication system includes. As shown in figure 8, the position of mobile equipment control device can include：
Receiving unit 801, for receiving useful signal and the destination end that the source equipment is sent in the same time Man made noise's signal that equipment is sent；
Transmitting element 802 is handled, for the useful signal and man made noise's signal to be handled, is handled Signal, and the process signal is transmitted to the target end equipment；
The receiving unit 801, it is additionally operable to receive the feedback letter that the target end equipment is directed to process signal return Breath, the feedback information are used for the secrecy capacity lifting for representing the communication system or declined；
Determining unit 803, for determining shift position according to the eavesdropping capacity of the feedback information and the mobile device；
Specifically, the determining unit 803 determines to move according to the eavesdropping capacity of the feedback information and the mobile device The mode of dynamic position is specially：
If the feedback information is used for the secrecy capacity lifting for representing the communication system, and the eavesdropping of the mobile device Capacity does not decline, and current moving step length is increased into the first moving step length；The position being presently according to the mobile device And first moving step length, determine shift position；
If the feedback information is used to represent that the secrecy capacity of the communication system to decline, current moving step length is reduced To the second moving step length；The position being presently according to the mobile device and second moving step length, it is determined that mobile position Put.
Mobile unit 804, for being moved to the shift position from the position that the mobile device is presently in.
Implement the position of mobile equipment control device shown in Fig. 8, having for source equipment transmission can be received in the same time The man made noise's signal sent with signal and target end equipment, further, at useful signal and man made noise's signal Reason, process signal is obtained, and process signal is sent to after target end equipment, it is possible to receive target end equipment for processing The feedback information that signal returns, determines shift position, and the position being presently in from mobile device is moved to according to feedback information Shift position, so as to optimize the secrecy capacity of communication system by neatly controlling the position of mobile device.
In the above-described embodiments, the description to each embodiment all emphasizes particularly on different fields, and does not have the portion being described in detail in some embodiment Point, it may refer to the associated description of other embodiment.
In several embodiments provided herein, it should be understood that disclosed device, can be by another way Realize.For example, device embodiment described above is only schematical, such as the division of the unit, it is only one kind Division of logic function, can there is an other dividing mode when actually realizing, such as multiple units or component can combine or can To be integrated into another system, or some features can be ignored, or not perform.Another, shown or discussed is mutual Coupling direct-coupling or communication connection can be by some interfaces, the INDIRECT COUPLING or communication connection of device or unit, Can be electrical or other forms.
The unit illustrated as separating component can be or may not be physically separate, show as unit The part shown can be or may not be physical location, you can with positioned at a place, or can also be distributed to multiple On NE.Some or all of unit therein can be selected to realize the mesh of this embodiment scheme according to the actual needs 's.
In addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, can also That unit is individually physically present, can also two or more units it is integrated in a unit.Above-mentioned integrated list Member can both be realized in the form of hardware, can also be realized in the form of SFU software functional unit.
If the integrated unit is realized in the form of SFU software functional unit and is used as independent production marketing or use When, it can be stored in a computer-readable access to memory.Based on such understanding, technical scheme substantially or Person say the part to be contributed to prior art or the technical scheme all or part can in the form of software product body Reveal and, the computer software product is stored in a memory, including some instructions are causing a computer equipment (can be personal computer, server or network equipment etc.) performs all or part of each embodiment methods described of the present invention Step.And foregoing memory includes：USB flash disk, read-only storage (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), mobile hard disk, magnetic disc or CD etc. are various can be with the medium of store program codes.
One of ordinary skill in the art will appreciate that all or part of step in the various methods of above-described embodiment is can To instruct the hardware of correlation to complete by program, the program can be stored in a computer-readable memory, memory It can include：Flash disk, read-only storage (English：Read-Only Memory, referred to as：ROM), random access device (English： Random Access Memory, referred to as：RAM), disk or CD etc..
Above to the position of mobile equipment control method of the dynamic noise based on Signal to Interference plus Noise Ratio disclosed in the embodiment of the present invention And device is described in detail, specific case used herein is set forth to the principle and embodiment of the present invention, The explanation of above example is only intended to help the method and its core concept for understanding the present invention；Meanwhile for the one of this area As technical staff, according to the thought of the present invention, there will be changes in specific embodiments and applications, to sum up institute State, this specification content should not be construed as limiting the invention.

Claims (10)

1. a kind of position of mobile equipment control method of the dynamic noise based on Signal to Interference plus Noise Ratio, the mesh included applied to communication system End equipment is marked, the communication system also includes the mobile device and source equipment, it is characterised in that methods described includes：
Determine first secrecy capacity of the communication system in (n+1) time slot relative to the communication system in nth slot First variation tendency of the second secrecy capacity, wherein, second secrecy capacity is that the communication system is optimal in nth slot Secrecy capacity, (n+1) time slot are current time slots, and the nth slot is a upper time slot for the current time slots, described N is positive integer；
Determine first eavesdropping capacity of the mobile device in (n+1) time slot relative to the mobile device in nth slot Second variation tendency of the second eavesdropping capacity, wherein, the second eavesdropping capacity is that the mobile device is optimal in nth slot Eavesdrop capacity；
Signal to Interference plus Noise Ratio SINR of the mobile device in same time received signal is determined, wherein, the mobile device exists Same time received signal includes coming from man made noise's signal of the target end equipment and coming from the source setting Standby useful signal；
According to first variation tendency, second variation tendency and the SINR, the target end equipment transmission is adjusted The transimission power of man made noise's signal；
According to first variation tendency, to the mobile device send feedback information, to control the movement of the mobile device Position, the feedback information are used for the secrecy capacity lifting for representing the communication system or declined.
2. the position of mobile equipment control method of the dynamic noise according to claim 1 based on Signal to Interference plus Noise Ratio, its feature It is, methods described also includes：
Compare the size of first secrecy capacity and second secrecy capacity, by first secrecy capacity and described second The larger secrecy capacity of numerical value is defined as the communication system in the optimal secrecy capacity of (n+1) time slot in secrecy capacity；With And
Compare the size of the first eavesdropping capacity and the described second eavesdropping capacity, by the described first eavesdropping capacity and described second The larger eavesdropping capacity of numerical value is defined as the communication system in the optimal eavesdropping capacity of (n+1) time slot in eavesdropping capacity；
The communication system is preserved in the optimal secrecy capacity of (n+1) time slot and the communication system in (n+1) time slot Optimal eavesdropping capacity.
3. the position of mobile equipment control method of the dynamic noise according to claim 2 based on Signal to Interference plus Noise Ratio, its feature It is, it is described according to first variation tendency, second variation tendency and the SINR, adjust the target end equipment Transmitting the transimission power of man made noise's signal includes：
If first variation tendency represents the secrecy capacity lifting of the communication system, it is determined that
If first variation tendency represents that the secrecy capacity of the communication system is not lifted, and second variation tendency represents The eavesdropping capacity of the mobile device does not decline, it is determined that
If first variation tendency represents that the secrecy capacity of the communication system is not lifted, and second variation tendency represents The eavesdropping capacity of the mobile device declines, it is determined that
Wherein, the PD(n+1) it is transmission work(of the target end equipment in man made noise's signal described in (n+1) slot transmission Rate, the PD(n) transimission power of man made noise's signal is transmitted in nth slot for the target end equipment；The γR(n+ 1) for the mobile device in the SINR of (n+1) time slot received signal, the γR(n) for the mobile device n-th The SINR of time slot received signal, the α are modifying factor and are fixed value.
4. the position of mobile equipment controlling party of the dynamic noise based on Signal to Interference plus Noise Ratio according to any one of claims 1 to 3 Method, it is characterised in that first secrecy capacity for determining the communication system in (n+1) time slot is relative to the communication system Before the first variation tendency of the second secrecy capacity of nth slot, methods described also includes system：
Artificial noise signal is sent to the mobile device；
The process signal of the mobile device forwarding is received, the process signal is that the mobile device believes the man made noise Signal after number being handled with the useful signal received in the same time from the source equipment；
The useful signal is obtained from the process signal.
5. a kind of position of mobile equipment control method of the dynamic noise based on Signal to Interference plus Noise Ratio, the shifting included applied to communication system Dynamic equipment, the communication system also include source equipment and target end equipment, it is characterised in that methods described includes：
The useful signal of the source equipment transmission and man made noise's letter of target end equipment transmission are received in the same time Number；
The useful signal and man made noise's signal are handled, obtain process signal, and the process signal is turned Issue the target end equipment；
Receive the target end equipment and be directed to the feedback information that the process signal returns, the feedback information is used to represent described The secrecy capacity lifting of communication system declines；
Shift position is determined according to the eavesdropping capacity of the feedback information and the mobile device, and it is current from the mobile device Location is moved to the shift position.
6. the position of mobile equipment control method of the dynamic noise according to claim 5 based on Signal to Interference plus Noise Ratio, its feature It is, the eavesdropping capacity according to the feedback information and the mobile device determines that shift position includes：
If the feedback information is used for the secrecy capacity lifting for representing the communication system, and the eavesdropping capacity of the mobile device Do not decline, current moving step length is increased into the first moving step length；The position that is presently according to the mobile device and First moving step length, determines shift position；
If the feedback information is used to represent that the secrecy capacity of the communication system to decline, current moving step length is decreased to the Two moving step lengths；The position being presently according to the mobile device and second moving step length, determine shift position.
7. a kind of position of mobile equipment control device, run on the target end equipment that communication system includes, it is characterised in that bag Include：
Determining unit, for determining first secrecy capacity of the communication system in (n+1) time slot relative to the communication system Unite in the first variation tendency of the second secrecy capacity of nth slot, wherein, second secrecy capacity is that the communication system exists The optimal secrecy capacity of nth slot, (n+1) time slot are current time slots, and the nth slot is upper for the current time slots One time slot, the n are positive integer；
The determining unit, it is additionally operable to determine first eavesdropping capacity of the mobile device in (n+1) time slot relative to described Mobile device nth slot second eavesdrop capacity the second variation tendency, wherein, it is described second eavesdropping capacity be the movement Equipment is in the optimal eavesdropping capacity of nth slot；
The determining unit, it is additionally operable to obtain Signal to Interference plus Noise Ratio SINR of the mobile device in same time received signal, Wherein, the mobile device includes coming from man made noise's signal of the target end equipment in same time received signal With the useful signal for coming from the source equipment；
Adjustment unit, for according to first variation tendency, second variation tendency and the SINR, adjusting the mesh Mark the transimission power that end equipment transmits man made noise's signal；
First transmitting element, for according to first variation tendency, to the mobile device send feedback information, to control The shift position of mobile device is stated, the feedback information is used for the secrecy capacity lifting for representing the communication system or declined.
8. position of mobile equipment control device according to claim 7, it is characterised in that the position of mobile equipment control Device also includes：
Compare determining unit, for the size of first secrecy capacity and second secrecy capacity, by described first The secrecy capacity secrecy capacity larger with numerical value in second secrecy capacity is defined as the communication system in (n+1) time slot Optimal secrecy capacity；
The relatively determining unit, the size of the first eavesdropping capacity described in comparison and the described second eavesdropping capacity is additionally operable to, by institute State the first eavesdropping capacity eavesdropping capacity larger with numerical value in the described second eavesdropping capacity and be defined as the communication system in (n+ 1) the optimal eavesdropping capacity of time slot；
Storage unit, for preserving the communication system in the optimal secrecy capacity of (n+1) time slot and the communication system In the eavesdropping capacity that (n+1) time slot is optimal.
9. position of mobile equipment control device according to claim 8, it is characterised in that the adjustment unit is according to First variation tendency, second variation tendency and the SINR, adjust the target end equipment and transmit the man made noise The mode of the transimission power of signal is specially：
If first variation tendency represents the secrecy capacity lifting of the communication system, it is determined that
If first variation tendency represents that the secrecy capacity of the communication system is not lifted, and second variation tendency represents The eavesdropping capacity of the mobile device does not decline, it is determined that
If first variation tendency represents that the secrecy capacity of the communication system is not lifted, and second variation tendency represents The eavesdropping capacity of the mobile device declines, it is determined that
Wherein, the PD(n+1) it is transmission work(of the target end equipment in man made noise's signal described in (n+1) slot transmission Rate, the PD(n) transimission power of man made noise's signal is transmitted in nth slot for the target end equipment；The γR(n+ 1) for the mobile device in the SINR of (n+1) time slot received signal, the γR(n) for the mobile device n-th The SINR of time slot received signal, the α are modifying factor and are fixed value.
10. the position of mobile equipment control device according to any one of claim 7 to 9, it is characterised in that the movement is set Standby position control also includes：
Second transmitting element, for determining that the communication system is held in first secrecy of (n+1) time slot in the determining unit Measure relative to the communication system before the first variation tendency of the second secrecy capacity of nth slot, to the mobile device Send man made noise's signal；
Receiving unit, for receiving the process signal of the mobile device forwarding, the process signal will for the mobile device Man made noise's signal and the signal after the useful signal that the same time receives from the source equipment is handled；
Acquiring unit, for obtaining the useful signal from the process signal.
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