CN107436601A - The position control method and device of the mobile device of adaptive noise feedback - Google Patents
The position control method and device of the mobile device of adaptive noise feedback Download PDFInfo
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- CN107436601A CN107436601A CN201710541677.XA CN201710541677A CN107436601A CN 107436601 A CN107436601 A CN 107436601A CN 201710541677 A CN201710541677 A CN 201710541677A CN 107436601 A CN107436601 A CN 107436601A
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- 230000003044 adaptive effect Effects 0.000 title claims abstract description 29
- 238000004891 communication Methods 0.000 claims abstract description 142
- 230000005540 biological transmission Effects 0.000 claims abstract description 20
- 238000003860 storage Methods 0.000 claims description 8
- 230000003247 decreasing effect Effects 0.000 claims description 7
- 230000007423 decrease Effects 0.000 description 9
- 238000005516 engineering process Methods 0.000 description 4
- 108090000623 proteins and genes Proteins 0.000 description 4
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Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D1/00—Control of position, course or altitude of land, water, air, or space vehicles, e.g. automatic pilot
- G05D1/02—Control of position or course in two dimensions
- G05D1/021—Control of position or course in two dimensions specially adapted to land vehicles
- G05D1/0212—Control of position or course in two dimensions specially adapted to land vehicles with means for defining a desired trajectory
- G05D1/0214—Control of position or course in two dimensions specially adapted to land vehicles with means for defining a desired trajectory in accordance with safety or protection criteria, e.g. avoiding hazardous areas
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D1/00—Control of position, course or altitude of land, water, air, or space vehicles, e.g. automatic pilot
- G05D1/02—Control of position or course in two dimensions
- G05D1/021—Control of position or course in two dimensions specially adapted to land vehicles
- G05D1/0276—Control of position or course in two dimensions specially adapted to land vehicles using signals provided by a source external to the vehicle
- G05D1/028—Control of position or course in two dimensions specially adapted to land vehicles using signals provided by a source external to the vehicle using a RF signal
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D1/00—Control of position, course or altitude of land, water, air, or space vehicles, e.g. automatic pilot
- G05D1/02—Control of position or course in two dimensions
- G05D1/021—Control of position or course in two dimensions specially adapted to land vehicles
- G05D1/0276—Control of position or course in two dimensions specially adapted to land vehicles using signals provided by a source external to the vehicle
- G05D1/0285—Control of position or course in two dimensions specially adapted to land vehicles using signals provided by a source external to the vehicle using signals transmitted via a public communication network, e.g. GSM network
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/185—Space-based or airborne stations; Stations for satellite systems
- H04B7/18502—Airborne stations
- H04B7/18504—Aircraft used as relay or high altitude atmospheric platform
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/185—Space-based or airborne stations; Stations for satellite systems
- H04B7/1851—Systems using a satellite or space-based relay
- H04B7/18519—Operations control, administration or maintenance
-
- 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 the position control method and device of a kind of mobile device of adaptive noise feedback, this method includes：The useful signal of the source equipment transmission and man made noise's signal of target end equipment transmission are received in the same time；Determine the Signal to Interference plus Noise Ratio SINR of the mobile device received signal；Shift position is determined according to the SINR, and the shift position is moved to from the position that the mobile device is presently in.The embodiment of the present invention can determine the shift position of mobile device according to the SINR, be further advanced by the adaptive power for adjusting man made noise to optimize the secrecy capacity of communication system, be continued for secure communication.
Description
Technical field
The present invention relates to the position control of communication technical field, more particularly to a kind of mobile device of adaptive noise feedback
Method and device.
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 control method and device of a kind of mobile device of adaptive noise feedback, energy
Enough shift positions that mobile device is determined according to the SINR, the power for being further advanced by adaptive adjustment man made noise are next excellent
Change the secrecy capacity of communication system, be continued for secure communication.
First aspect of the embodiment of the present invention discloses a kind of position control method of the mobile device of adaptive noise feedback, should
The mobile device included for communication system, the communication system also include source equipment and target end equipment, methods described bag
Include：
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；
Determine the Signal to Interference plus Noise Ratio SINR of the mobile device received signal；
Shift position is determined according to the SINR, and the movement is moved to from the position that the mobile device is presently in
Position.
As an alternative embodiment, in first aspect of the embodiment of the present invention, it is described to be determined according to the SINR
Shift position includes：
Determine that the mobile device eavesdrops capacity the first of (n+1) time slot according to the SINR；
If the first eavesdropping capacity is more than the mobile device eavesdrops capacity the second of nth slot, by current shifting
Dynamic step-length increases to the first moving step length；The position being presently according to the mobile device and first moving step length,
Determine shift position；
If the first eavesdropping capacity is less than or equal to the mobile device eavesdrops capacity the second of nth slot, ought
Preceding moving step length is decreased to the second moving step length；The position being presently according to the mobile device and second movement
Step-length, determine shift position；
Wherein, the second eavesdropping capacity is the mobile device in the optimal eavesdropping capacity of nth slot；(the n+
1) time slot is current time slots, and the nth slot is a upper time slot for the current time slots, and the n is positive integer；
As an alternative embodiment, in first aspect of the embodiment of the present invention, methods described also includes：
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 eavesdropping capacity of (n+1) time slot.
As an alternative embodiment, in first aspect of the embodiment of the present invention, methods described also includes：
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.
Second aspect of the embodiment of the present invention discloses a kind of position control method of the mobile device of adaptive noise feedback, should
The target end equipment included for communication system, the communication system also include the mobile device and source equipment, its feature
It is, 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 and coming from source setting in same time received signal
Standby useful signal；
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.
As an alternative embodiment, in second 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
In the eavesdropping capacity that (n+1) time slot is optimal.
As an alternative embodiment, in second 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 source equipment is handled；
The useful signal is obtained from the process signal.
As an alternative embodiment, in second 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, and the second variation tendency table
Show the eavesdropping capacity boost of the mobile device, determine PD(n+1)=PD(n)；
If first variation tendency represents the secrecy capacity lifting of the communication system, and the second variation tendency table
Show that the eavesdropping capacity of the mobile device is not lifted, 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, determine PD(n+1)=PD(n)；
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 third aspect of the embodiment of the present invention discloses a kind of position control of mobile device, and running on communication system includes
Mobile device, 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；
Determining unit, for determining the Signal to Interference plus Noise Ratio SINR of the mobile device received signal；
The determining unit, it is additionally operable to determine shift position according to the SINR；
Mobile unit, for being moved to the shift position from the position that the mobile device is presently in.
As an alternative embodiment, in the third aspect of the embodiment of the present invention, the determining unit is according to
SINR determines that the mode of shift position is specially：
Determine that the mobile device eavesdrops capacity the first of (n+1) time slot according to the SINR；
If the first eavesdropping capacity is more than the mobile device eavesdrops capacity the second of nth slot, by current shifting
Dynamic step-length increases to the first moving step length；The position being presently according to the mobile device and first moving step length,
Determine shift position；
If the first eavesdropping capacity is less than or equal to the mobile device eavesdrops capacity the second of nth slot, ought
Preceding moving step length is decreased to the second moving step length；The position being presently according to the mobile device and second movement
Step-length, determine shift position；
Wherein, the second eavesdropping capacity is the mobile device in the optimal eavesdropping capacity of nth slot；(the n+
1) time slot is current time slots, and the nth slot is a upper time slot for the current time slots, and the n is positive integer；
As an alternative embodiment, in the third aspect of the embodiment of the present invention, the position control of the mobile device
Device processed also includes：
Compare determining unit, for the size of the more described 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；
Storage unit, for the communication system 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 position control of the mobile device
Device processed also includes：
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.
Fourth aspect of the embodiment of the present invention discloses a kind of position control of mobile device, and running on communication system includes
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 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.
As an alternative embodiment, in fourth aspect of the embodiment of the present invention, the position control of the mobile device
Device processed 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 fourth aspect of the embodiment of the present invention, the position control of the mobile device
Device processed also includes：
Transmitting element, for the determining unit determine system (n+1) time slot the first secrecy capacity relative to
The system is before the first variation tendency of the second optimal secrecy capacity of nth slot, to described in mobile device transmission
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；
The acquiring unit, it is additionally operable to obtain the useful signal from the process signal.
As an alternative embodiment, in fourth 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, and the second variation tendency table
Show the eavesdropping capacity boost of the mobile device, determine PD(n+1)=PD(n)；
If first variation tendency represents the secrecy capacity lifting of the communication system, and the second variation tendency table
Show that the eavesdropping capacity of the mobile device is not lifted, 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, determine PD(n+1)=PD(n)；
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.
Compared with prior art, the embodiment of the present invention possesses following beneficial effect：
In the embodiment of the present invention, mobile device can be received in the same time useful signal that the source equipment sends and
Man made noise's signal that the target end equipment is sent, determine the Signal to Interference plus Noise Ratio SINR of the mobile device received signal；Enter
One step, mobile device can determine shift position according to the SINR, and be moved from the position that the mobile device is presently in
Move to the shift position.It can be seen that by the embodiment of the present invention, mobile device can be according to the information that itself is received (such as
SINR) determine the shift position of mobile device, be further advanced by the power of adaptive adjustment man made noise to optimize communication
The secrecy capacity of 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 stream of the position control method of the mobile device of adaptive noise feedback disclosed in the embodiment of the present invention
Journey schematic diagram；
Fig. 3 is the position control method of the mobile device of another adaptive noise feedback disclosed in the embodiment of the present invention
Schematic flow sheet；
Fig. 4 is the position control method of the mobile device of another adaptive noise feedback disclosed in the embodiment of the present invention
Schematic flow sheet；
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 the position control of mobile device disclosed in the embodiment of the present invention；
Fig. 7 is the structural representation of the position control of another mobile 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 control method and device of a kind of mobile device of adaptive noise feedback.With
Under be combined accompanying drawing and 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, target end equipment D can be stolen with the variation tendency (lifting declines) of the secrecy capacity of communication system, mobile device R
The variation tendency (lifting or decline) of auditory volume and mobile device same time received signal SINR, described in adjustment
Target end equipment transmits the transimission power of man made noise's signal, meanwhile, mobile device R can determine the mobile device institute
The Signal to Interference plus Noise Ratio SINR of reception signal；Shift position is determined according to the SINR, and from the position that the mobile device is presently in
Put and be moved to the shift position, so as to determine the shift position of mobile device according to the SINR, further optimize
The secrecy capacity of communication system, is continued for secure communication.
Referring to Fig. 2, Fig. 2 is a kind of position control of the mobile device of adaptive noise feedback disclosed in the embodiment of the present invention
The schematic flow sheet of method processed.Wherein, the position control method of the mobile device of adaptive noise feedback is applied to mobile set
It is standby, as shown in Fig. 2 the position control method of the mobile device of adaptive noise feedback may comprise steps of：
Step 201, 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.
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.
Assuming that target end equipment sends man made noise's signal x to the mobile deviceD, target end equipment transmission described in
Man made noise's signal xDTransimission power be PD, wherein, transmitted between the target end equipment and the mobile device described artificial
Noise 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, 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.
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, mobile device determine the Signal to Interference plus Noise Ratio SINR of the mobile device received signal.
Wherein, the SINR between mobile device receives useful signal and man made noise's signal can be expressed as
Mobile device can determine to eavesdrop capacityWherein, steal
Auditory volume can be expressed as the mutual information between source equipment S and mobile device R.
Step 204, mobile device determine shift position according to the SINR, and from the position that the mobile device is presently in
Put and be moved to the shift position.
Wherein, the mobile device determines that shift position includes according to the SINR：
Determine that the mobile device eavesdrops capacity the first of (n+1) time slot according to the SINR；
If the first eavesdropping capacity is more than the mobile device eavesdrops capacity the second of nth slot, by current shifting
Dynamic step-length increases to the first moving step length；The position being presently according to the mobile device and first moving step length,
Determine shift position；
If the first eavesdropping capacity is less than or equal to the mobile device eavesdrops capacity the second of nth slot, ought
Preceding moving step length is decreased to the second moving step length；The position being presently according to the mobile device and second movement
Step-length, determine shift position；
Wherein, the second eavesdropping capacity is the mobile device in the optimal eavesdropping capacity of nth slot；(the n+
1) time slot is current time slots, and the nth slot is a upper time slot for the current time slots, and the n is positive integer；
Wherein, it is more than the mobile device in the second of the nth slot situation for eavesdropping capacity in the described first eavesdropping capacity
Down, it is necessary to determine whether to accumulate whether positive feedback counter exceedes accumulation positive feedback counter threshold, if so, described in then performing
Current moving step length is increased into the first moving step length；Equally, it is less than or equal to the shifting in the described first eavesdropping capacity
Dynamic equipment is in the case of the second eavesdropping capacity of nth slot, it is necessary to determine whether to accumulate whether negative-feedback counter exceedes
Negative-feedback counter threshold is accumulated, if so, current moving step length is decreased into the second moving step length described in then performing.Its
In, in order to avoid moving step length is honest too fast, it is also necessary to which positive feedback counter threshold Dynamic gene removes adjustment accumulation positive feedback meter
Number device threshold value.
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)).
The size of step 205, the mobile device first eavesdropping capacity and the described second eavesdropping capacity, by described the
The one 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 gap.
In the embodiment of the present invention, the eavesdropping capacity that is stored in the internal memory of mobile device be all it is optimal, i.e., described second
Eavesdropping capacity is the communication system in the optimal eavesdropping capacity of nth slot；Mobile device needs optimal in real-time update internal memory
Eavesdropping capacity, the rule that optimal eavesdropping capacity updates is：
CR,best(n+1)=max (CR,best(n),CR(n+1))
According to the renewal rule of above-mentioned optimal eavesdropping capacity, mobile device needs the first eavesdropping capacity and institute
The size of the second eavesdropping capacity is stated, by the eavesdropping capacity that the described first eavesdropping capacity is larger with numerical value in the described second eavesdropping capacity
It is defined as the communication system in the optimal eavesdropping capacity of (n+1) time slot.
Step 206, mobile device preserve the communication system in the optimal eavesdropping capacity of (n+1) time slot.
In the method flow described by Fig. 2, mobile device can receive what the source equipment was sent in the same time
Man made noise's signal that useful signal and the target end equipment are sent, determines that the letter of the mobile device received signal is dry and makes an uproar
Compare SINR；Further, mobile device can determine shift position according to the SINR, and be presently in from the mobile device
Position be moved to the shift position.It can be seen that the letter that can be received by the embodiment of the present invention, mobile device according to itself
(such as SINR) is ceased to determine the shift position of mobile device.
Referring to Fig. 3, Fig. 3 is the position of the mobile device of another adaptive noise feedback disclosed in the embodiment of the present invention
The schematic flow sheet of control method.Wherein, the position control method of the mobile device of adaptive noise feedback is applied to target
End equipment, as shown in Fig. 2 the position control method of the mobile device of adaptive noise feedback may comprise steps of：
Step 301, target end equipment send man made noise's signal to the mobile device.
Where it is assumed that target end equipment sends man made noise's signal x to the mobile deviceD, target end equipment biography
Defeated man made noise's signal xDTransimission power be PD, wherein, transmit institute between the target end equipment and the mobile device
State man made noise's signal xDShown in for example above-mentioned formula (5) of caused path loss, the correlation that specifically refer in formula (5) is retouched
State, will not be repeated here.
Step 302, 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
Shown in for example above-mentioned formula (7) of raw path loss, the associated description in formula (7) is specifically refer to, will not be repeated here.Target
End equipment is received shown in for example above-mentioned formula (8) of process signal of the mobile device forwarding, specifically refer to the phase in formula (8)
Description is closed, will not be repeated here.
Step 303, 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 304, 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 capacityWherein, institute
Mutual information between source equipment S and target end equipment D can be represented by stating message capacity.The eavesdropping capacity of mobile device such as public affairs
Shown in formula (10), target end equipment determines first secrecy capacity C of the communication system in (n+1) time slots(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 305, 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 306, 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 source equipment.Target end equipment can obtain the mobile device from mobile device
In the Signal to Interference plus Noise Ratio SINR of same time received signal, or, target end equipment can calculate the mobile device and exist
The Signal to Interference plus Noise Ratio SINR of same time received signal.
Step 307, 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, and the second variation tendency table
Show the eavesdropping capacity boost of the mobile device, determine PD(n+1)=PD(n)；
If first variation tendency represents the secrecy capacity lifting of the communication system, and the second variation tendency table
Show that the eavesdropping capacity of the mobile device is not lifted, 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, determine PD(n+1)=PD(n)；
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.
Specific algorithm is as follows：
The size of step 308, 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 309, 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 310, 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. 3, target end equipment (can carry according to the variation tendency of the secrecy capacity of communication system
Rise or decline), the variation tendency (lifting or decline) of the eavesdropping capacity of mobile device and mobile device connect in the same time
The Signal to Interference plus Noise Ratio SINR of the signal of receipts adjusts the transimission power that the target end equipment transmits man made noise's signal, passes through
The transimission power of man made noise's signal is adaptively adjusted to optimize the secrecy capacity of communication system, makes secure communication constantly
Carry out.
Referring to Fig. 4, Fig. 4 is the position of the mobile device of another adaptive noise feedback disclosed in the embodiment of the present invention
The schematic flow sheet of control method.Wherein, the position control method of the mobile device of adaptive noise feedback is set from source
Come what is described, the part or all of step in Fig. 4 is referred in Fig. 2 or Fig. 3 for standby, mobile device and the side of target end equipment three
Description, will not be repeated here.As shown in figure 4, the position control method of the mobile device of adaptive noise feedback can wrap
Include following steps：
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 determine 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.
Step 410, mobile device determine the Signal to Interference plus Noise Ratio SINR of the mobile device received signal.
Step 411, mobile device determine shift position according to the SINR, and from the position that the mobile device is presently in
Put and be moved to the shift position.
The size of step 412, 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 413, 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 414, 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.
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, R original position for (- 1500m, -1000m,
100m), initial step length δ0(0)=80m.CDRepresent message capacity, CSRepresent secrecy capacity, CRRepresent eavesdropping capacity.In Figure 5,
Mobile device can determine the shift position of mobile device according to the information (such as SINR) that itself is received, and communication system is carrying
High secrecy capacity CSWhile, eavesdropping capacity C is not sacrificedR, so as to allow mobile device R fully to trust communication system, make safety
Carry out communication lasts.
Referring to Fig. 6, Fig. 6 is a kind of structural representation of the position control of mobile device disclosed in the embodiment of the present invention
Figure.Wherein, the position control of the mobile device described by Fig. 6 can be used for performing adaptively making an uproar described by Fig. 2 or Fig. 4
Part or all of step in the position control method of the mobile device of acoustic feedback, the correlation specifically referred in Fig. 2 or Fig. 4 are retouched
State, will not be repeated here.Wherein, the position control of the mobile device runs on the mobile device that communication system includes.Such as
Shown in Fig. 6, the position control of the mobile device can include：
Receiving unit 601, 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；
Determining unit 602, for determining the Signal to Interference plus Noise Ratio SINR of the mobile device received signal；
The determining unit 602, it is additionally operable to determine shift position according to the SINR；
Specifically, the determining unit 602 determines that the mode of shift position is specially according to the SINR：
Determine that the mobile device eavesdrops capacity the first of (n+1) time slot according to the SINR；
If the first eavesdropping capacity is more than the mobile device eavesdrops capacity the second of nth slot, by current shifting
Dynamic step-length increases to the first moving step length；The position being presently according to the mobile device and first moving step length,
Determine shift position；
If the first eavesdropping capacity is less than or equal to the mobile device eavesdrops capacity the second of nth slot, ought
Preceding moving step length is decreased to the second moving step length；The position being presently according to the mobile device and second movement
Step-length, determine shift position；
Wherein, the second eavesdropping capacity is the mobile device in the optimal eavesdropping capacity of nth slot；(the n+
1) time slot is current time slots, and the nth slot is a upper time slot for the current time slots, and the n is positive integer；
Mobile unit 603, for being moved to the shift position from the position that the mobile device is presently in.
Optionally, the position control of mobile device as shown in Figure 6 can also include：
Compare determining unit 604, for the size of the more described first eavesdropping capacity and the described second eavesdropping capacity, 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 605, for the communication system in the optimal eavesdropping capacity of (n+1) time slot.
Optionally, the position control of mobile device as shown in Figure 6 can also include：
Processing sends 606, 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.
It can be seen that by the embodiment of the present invention, mobile device can determine according to the information (such as SINR) that itself is received
The shift position of mobile device, further optimize the secrecy capacity of communication system, be continued for secure communication.
Wherein, the position control of the mobile device described by Fig. 6 is implemented, mobile device can receive according to itself
Information (such as SINR) determine the shift position of mobile device, further optimize the secrecy capacity of communication system, make safety
Carry out communication lasts.
Referring to Fig. 7, the structure that Fig. 7 is the position control of another mobile device disclosed in the embodiment of the present invention is shown
It is intended to.Wherein, the position control of the mobile device described by Fig. 7 can be used for adaptive described by execution Fig. 3 or Fig. 4
Part or all of step in the position control method of the mobile device of noise feedback, specifically refers to the correlation in Fig. 3 or Fig. 4
Description, will not be repeated here.Wherein, the destination end that the position control of the mobile device runs on communication system and included is set
It is standby.The position control of mobile device shown in Fig. 7 can include：
Determining unit 701, 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 701, 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 701, 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 source equipment；
Adjustment unit 702, 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.
The adjustment unit 702 is according to first variation tendency, second variation tendency and the SINR, adjustment
The mode that the target end equipment transmits the transimission power of man made noise's signal is specially：
If first variation tendency represents the secrecy capacity lifting of the communication system, and the second variation tendency table
Show the eavesdropping capacity boost of the mobile device, determine PD(n+1)=PD(n)；
If first variation tendency represents the secrecy capacity lifting of the communication system, and the second variation tendency table
Show that the eavesdropping capacity of the mobile device is not lifted, 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, determine PD(n+1)=PD(n)；
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.
Optionally, the position control of mobile device as shown in Figure 7 can also include：
Compare determining unit 703, 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 703, 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 704, 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 control of mobile device as shown in Figure 7 can also include：
Transmitting element 705, for determining that system is relative in first secrecy capacity of (n+1) time slot in the determining unit
Before first variation tendency of the system in the second optimal secrecy capacity of nth slot, institute is sent to the mobile device
State man made noise's signal；
Receiving unit 706, 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 707, for obtaining the useful signal from the process signal.
Wherein, the position control of the mobile device described by Fig. 7 is implemented, target end equipment can be according to communication system
The variation tendency (lifting or decline) of secrecy capacity, mobile device eavesdropping capacity variation tendency (lifting declines) and
It is described artificial that mobile device adjusts the target end equipment transmission in the Signal to Interference plus Noise Ratio SINR of same time received signal
The transimission power of noise signal, more neatly to control the shift position of the mobile device, further optimize communication system
The secrecy capacity of system, is continued for secure communication.
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 control method of the mobile device of a kind of adaptive noise feedback disclosed in the embodiment of the present invention and
Device is described in detail, and specific case used herein is set forth to the principle and embodiment of the present invention, with
The explanation of upper embodiment is only intended to help the method and its core concept for understanding the present invention；Meanwhile for the general of this area
Technical staff, according to the thought of the present invention, there will be changes in specific embodiments and applications, in summary,
This specification content should not be construed as limiting the invention.
Claims (10)
1. a kind of position control method of the mobile device of adaptive noise feedback, the movement included applied to communication system are set
Standby, the communication system also includes 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；
Determine the Signal to Interference plus Noise Ratio SINR of the mobile device received signal；
Shift position is determined according to the SINR, and the mobile position is moved to from the position that the mobile device is presently in
Put.
2. the position control method of the mobile device of adaptive noise feedback according to claim 1, it is characterised in that institute
State and determine that shift position includes according to the SINR：
Determine that the mobile device eavesdrops capacity the first of (n+1) time slot according to the SINR；
If the first eavesdropping capacity is more than the mobile device eavesdrops capacity the second of nth slot, by current mobile step
Length increases to the first moving step length；The position being presently according to the mobile device and first moving step length, it is determined that
Shift position；
If the first eavesdropping capacity is less than or equal to the mobile device eavesdrops capacity the second of nth slot, will be current
Moving step length is decreased to the second moving step length；The position being presently according to the mobile device and the second movement step
It is long, determine shift position；
Wherein, the second eavesdropping capacity is the mobile device in the optimal eavesdropping capacity of nth slot；When (n+1)
Gap is current time slots, and the nth slot is a upper time slot for the current time slots, and the n is positive integer.
3. the position control method of the mobile device of adaptive noise feedback according to claim 2, it is characterised in that institute
Stating method also includes：
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 eavesdropping capacity of (n+1) time slot.
4. the position control method of the mobile device of the adaptive noise feedback according to any one of claims 1 to 3, it is special
Sign is that methods described also includes：
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.
5. a kind of position control of mobile device, run on the mobile device that communication system includes, it is characterised in that bag
Include：
Receiving unit, for receiving useful signal and the target end equipment transmission that the source equipment is sent in the same time
Man made noise's signal；
Determining unit, for determining the Signal to Interference plus Noise Ratio SINR of the mobile device received signal；
The determining unit, it is additionally operable to determine shift position according to the SINR；
Mobile unit, for being moved to the shift position from the position that the mobile device is presently in.
6. the position control of mobile device according to claim 5, it is characterised in that the determining unit is according to institute
State SINR and determine that the mode of shift position is specially：
Determine that the mobile device eavesdrops capacity the first of (n+1) time slot according to the SINR；
If the first eavesdropping capacity is more than the mobile device eavesdrops capacity the second of nth slot, by current mobile step
Length increases to the first moving step length；The position being presently according to the mobile device and first moving step length, it is determined that
Shift position；
If the first eavesdropping capacity is less than or equal to the mobile device eavesdrops capacity the second of nth slot, will be current
Moving step length is decreased to the second moving step length；The position being presently according to the mobile device and the second movement step
It is long, determine shift position；
Wherein, the second eavesdropping capacity is the mobile device in the optimal eavesdropping capacity of nth slot；When (n+1)
Gap is current time slots, and the nth slot is a upper time slot for the current time slots, and the n is positive integer.
7. the position control of mobile device according to claim 6, it is characterised in that the position of the mobile device
Control device also includes：
Compare determining unit, for the size of the more described first eavesdropping capacity and the described second eavesdropping capacity, by described first
The eavesdropping capacity eavesdropping capacity larger with numerical value in the described second eavesdropping capacity is defined as the communication system in (n+1) time slot
Optimal eavesdropping capacity；
Storage unit, for the communication system in the optimal eavesdropping capacity of (n+1) time slot.
8. the position control of the mobile device according to any one of claim 5 to 7, it is characterised in that the movement
The position control of equipment also includes：
Transmitting element is handled, for the useful signal and man made noise's signal to be handled, obtains process signal, and
The process signal is transmitted to the target end equipment.
9. a kind of position control of mobile 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 determine 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 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.
10. the position control of mobile device according to claim 9, it is characterised in that the position of the mobile device
Putting 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.
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| WO2019006713A1 (en) * | 2017-07-05 | 2019-01-10 | 深圳大学 | Mobile device position control method and apparatus based on adaptive noise feedback |
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