CN107295623A - The communication means and full duplex relaying system of a kind of full duplex relaying system - Google Patents
The communication means and full duplex relaying system of a kind of full duplex relaying system Download PDFInfo
- Publication number
- CN107295623A CN107295623A CN201710439182.6A CN201710439182A CN107295623A CN 107295623 A CN107295623 A CN 107295623A CN 201710439182 A CN201710439182 A CN 201710439182A CN 107295623 A CN107295623 A CN 107295623A
- Authority
- CN
- China
- Prior art keywords
- full duplex
- signal
- msub
- mrow
- power
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- 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
- H04W52/243—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters taking into account interferences
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/155—Ground-based stations
- H04B7/15528—Control of operation parameters of a relay station to exploit the physical medium
-
- 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
- H04W52/30—TPC using constraints in the total amount of available transmission power
- H04W52/34—TPC management, i.e. sharing limited amount of power among users or channels or data types, e.g. cell loading
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Radio Relay Systems (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The invention discloses a kind of communication means of full duplex relaying system and full duplex relaying system, in time slot t=1, by information source S with power PSSignal x (t) is sent to full duplex relaying node R, x (t) is received and decoded by R；In time slot t+1, if R successfully decodeds, R is with power PRThe signal x (t) of successfully decoded is sent to stay of two nights D, and S is with PSThe new signal x (t+1) produced is sent to R, signal x (t+1) is received and decoded under signal x (t) loop self-interference by R；In time slot t+1, if R decoding failures, S is with PSThe new signal x (t+1) produced is sent to R, signal x (t+1) is received and decoded by R, wherein, PS、PRBy the adaptive tracking control strategy based on information interference and coupling characteristic or the combined signal source relay power allocation strategy based on information interference and coupling characteristic is determined.The present invention reaches system under conditions of target outage probability is met, the purpose of lifting system efficiency by reasonable distribution information source and the transmission power of relaying.
Description
Technical field
The invention belongs to wireless communication technology field, more particularly, to a kind of communication means of full duplex relaying system
And full duplex relaying system.
Background technology
Because cooperating relay technology can effectively expand wireless communication system coverage, strengthening system robustness turns into
One of wireless communication system key technology.Traditionally, via node general work is in semiduplex mode, it is necessary to for its reception and hair
The number of delivering letters distributes mutually orthogonal channel resource.This seriously compromises the availability of frequency spectrum of wireless communication system.In order to make up biography
The loss of spectral efficiency that half-duplex relay of uniting banding comes, researchers propose full duplex relaying retransmission technique.
By disposing at least two antennas, full duplex relaying node is capable of the same of a time slot is received before forwarding signal
When, receive the new signal that current time slots information source is sent.Traditional half-duplex relay system is compared, in theory full duplex relaying system
Can be by almost one times of spectrum efficiency lifting.But, caused because full duplex relaying forward signal can receive signal to its purpose
Loop self-interference, result in the coupled characteristic of information signal and self-interference signal.On the one hand, if via node transmission power mistake
It is small, the communication quality of " relaying-stay of two nights " link can be damaged；On the other hand, if via node transmission power is excessive, it can cause tight
The loop self-interference influence of weight, and then damage the communication quality of " information source-relaying " link.Therefore, in order to be effectively improved full duplex
The communication performance of relay system is, it is necessary between balancing information signal and interference signal, and information source transmission power and repeat transmitted
Mutual restricting relation between power.
In current full duplex relaying system, although extensive work considers the loop self-interference of full duplex relaying node
Problem, but mutual restricting relation this angle not between information source transmission power and repeat transmitted power is to systematicness
It can optimize, therefore preferably system energy efficiency can not be obtained.
The content of the invention
For the disadvantages described above or Improvement requirement of prior art, object of the present invention is to provide a kind of full duplex relaying
The communication means and full duplex relaying system of system, thus solve system energy efficiency in existing full duplex list relay system relatively low
Technical problem.
To achieve the above object, according to one aspect of the present invention, there is provided a kind of communication party of full duplex relaying system
Method, it is characterised in that including：
S1, in time slot t=1, information source S produces signal x (t), and with power PSSignal x is sent to full duplex relaying node R
(t), signal x (t) is received and decoded by the full duplex relaying node R, wherein, the power PSBy default power
Allocation strategy is determined；
If S2, the full duplex relaying node R can be successfully decoded, step S3 is performed, step S4 is otherwise performed；
S3, in time slot t+1, the full duplex relaying node R is with power PRThe signal x of successfully decoded is sent to stay of two nights D
(t), while the information source S is with the power PSThe new signal x (t+1) produced is sent to the full duplex relaying node R, by institute
State full duplex relaying node R signal x (t+1) is received and decoded under signal x (t) loop self-interference, then perform
Step S5, wherein, the power PRDetermined by the default power distribution strategies；
S4, in time slot t+1, the information source S is with the power PSThe new letter produced is sent to the full duplex relaying node R
Number x (t+1), is received and is decoded to signal x (t+1) by the full duplex relaying node R, then performs step S5；
S5, judge whether signals transmission completes, if completing, perform step S6；Otherwise, return and perform step S2；
S6, the signal for judging the newest reception of the via node R success decoding, if being successfully decoded, the relaying
Node R is with power PRThe signal being successfully decoded is transmitted to stay of two nights D, terminates transmitting procedure；Otherwise, transmitting procedure is directly terminated.
Preferably, the power PSDetermined by default power distribution strategies and the power PRBy the default work(
The determination of rate allocation strategy, including：
Because relaying R works in full-duplex mode, therefore stay of two nights D information signal x is transmitted in time slot t+1, relaying R
(t) loop self-interference can be produced to information signal x (t+1) of the relay reception from information source S, thus produces information signal and certainly dry
The coupling between signal is disturbed, in order to balance between " information signal " and " interference signal ", and " information source-relaying " and " relaying-letter
Relation between this double bounce transmission of place "；
Set the transmission power P of the information source SS, and adaptively adjust the transmission power P of the full duplex relaying node RR,
On the premise of target outage probability is reached be optimal, the energy efficiency EE of system, wherein PR∈[0,Pmax], PmaxIt is
The maximum transmission power that the full duplex relaying node R can reach.
Preferably, the transmission power PRAcquiring method be：
ByAsk for so that the energy efficiency EE of system corresponding P when being optimalRValue is used as target PR
Value.
Preferably, the power PSDetermined by default power distribution strategies and the power PRBy the default work(
The determination of rate allocation strategy, including：
Because relaying R works in full-duplex mode, therefore stay of two nights D information signal x is transmitted in time slot t+1, relaying R
(t) loop self-interference can be produced to information signal x (t+1) of the relay reception from information source S, thus produces information signal and certainly dry
The coupling between signal is disturbed, in order to balance between " information signal " and " interference signal ", and " information source-relaying " and " relaying-letter
Relation between this double bounce transmission of place "；
By the transmission power P of the information source SSIt is set as PS=α P, the transmission power of the full duplex relaying node R is set
It is set to PR=(1- α) P, wherein, P represents total power consumption of the system in each time slot, and α represents power-division ratios.
Preferably, the acquiring method of the α values is：
ByAsk for so that the energy efficiency EE of system when being optimal corresponding α values as target α
Value.
Preferably, the energy efficiency EE of system acquiring method is：
For any time slot t, the probability π that source signal x (t) is successfully decoded in the full duplex relaying node R is obtained1And
Probability of failure π0：Wherein, P10Represent that the full duplex relaying node R has loop certainly
During interference, the probability of failure, P are decoded in time slot t+101When representing that loop self-interference is not present in the full duplex relaying node R,
The probability that time slot t+1 can be successfully decoded；
By π0With π1Obtain the overall average interrupt probability P of systemout：Pout=π0+π1(1-Pd), wherein, PdRepresent described
The probability of the signal from the full duplex relaying node R can be successfully decoded in stay of two nights D；
By the overall average interrupt probability P of systemoutAnd system obtains the energy of system in the total power consumption P of each time slot
Efficiency EE：Wherein, EE represents to consume the data volume that unit energy is capable of Successful transmissions, RTRepresent described
The nominal data transfer rates of information source S signals.
Preferably, the full duplex relaying node R, can be to signal x (t+ in time slot t+1 when there is loop self-interference
1) probability P of successfully decoded11And the probability P of decoding failure10Respectively：
The full duplex relaying node R is in loop free self-interference, in time slot t+1 to the general of signal x (t+1) successfully decoded
Rate P01And the probability P of decoding failure00Respectively：
P01=Pr { log2(1+|gS,R|2PS)≥RT}
P00=Pr { log2(1+|gS,R|2PS)<RT}
Wherein, gS,RFor the information source S to the channel gain of the full duplex relaying node R, gR,RFor in the full duplex
After the loop self-interference channel gain of node R, PSI=PR 1-μRepresent that the full duplex relaying node R is an actually-received loop certainly dry
The power disturbed, 0 ＜ μ ＜ 1, RTFor the nominal data transfer rates of the information source S signals.
Preferably, in step s 4, the signal from the full duplex relaying node R can be successfully decoded in the stay of two nights D
Probability PdFor：Pd=Pr { log2(1+|gR,D|2PR)≥RT, wherein, gR,DFor the full duplex relaying node R to the stay of two nights
D channel gain.
Preferably, P11、P10、P01And P00By the full duplex relaying node R the actual receptions of time slot t+1 signal yR
(t+1) ask for obtaining, PdThe signal y received by the stay of two nights D in time slot t+1D(t+1) ask for obtaining, wherein：
Produced in view of the signal that forward signal x (t) is received to full duplex relaying node R purpose described in time slot t+1
Loop self-interference, therefore, the signal y of the actual reception of full duplex relaying node RR(t+1) it is：
Wherein, nRFor the additive white Gaussian noise at the full duplex relaying node R, nDIt is high for the additivity at the stay of two nights D
This white noise.
It is another aspect of this invention to provide that there is provided a kind of full duplex relaying system, including：Information source S, stay of two nights D and complete double
Work via node R；
Wherein, the full duplex relaying node R is deployed between the information source S and the stay of two nights D；
The full duplex relaying system is used to perform the method described in any one provided in an embodiment of the present invention.
In general, the inventive method can obtain following beneficial effect compared with prior art：
(1) present invention reaches system by default power distribution strategies reasonable distribution information source and the transmission power of relaying
Under conditions of target outage probability is met, the purpose of lifting system efficiency.
(2) present invention can obtain that probability is successfully decoded during each time slot " information source-relaying " stable state, further obtain system
Outage probability and energy efficiency, simplify analysis and derivation.
(3) the adaptive tracking control method of a kind of full duplex relaying system proposed by the present invention, by adaptively adjusting
The transmission power of relaying, reduces the influence that the mutual coupling effect between trunk information signal and self-interference signal is brought to system, makes
On the premise of system reaches target outage probability, unnecessary system energy consumption is reduced, optimizes the energy efficiency of system.
(4) present invention proposes combined signal source-relay power under a kind of full duplex relaying total system power consumption confined condition
Distribution method.Make full use of due to caused by the coupling between information signal and self-interference signal " information source-relaying " with " relaying-
The characteristic mutually restricted between the stay of two nights " this double bounce transmission, on the premise of total system power consumption is limited, reasonable distribution information source and relaying
Transmission power, be obviously improved the performance of system.
Brief description of the drawings
Fig. 1 is a kind of model schematic of full duplex relaying system disclosed in the embodiment of the present invention；
Fig. 2 is a kind of schematic flow sheet of the communication means of full duplex relaying system disclosed in the embodiment of the present invention；
Fig. 3 is the repeat transmitted power and system under the adaptive tracking control method based on information-interference and coupling characteristic
Relation schematic diagram between outage probability；
Fig. 4 is the repeat transmitted power and system under the adaptive tracking control method based on information-interference and coupling characteristic
Relation schematic diagram between energy efficiency；
Fig. 5 is the power partition coefficient under combined signal source-relay power distribution method under total system power consumption confined condition
With the relation schematic diagram between system break probability；
Fig. 6 is the power partition coefficient under combined signal source-relay power distribution method under total system power consumption confined condition
Relation schematic diagram between system energy efficiency.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right below in conjunction with drawings and Examples
The present invention is further elaborated.It should be appreciated that specific embodiment described herein is only to explain the present invention, not
For limiting the present invention.As long as in addition, technical characteristic involved in each embodiment of invention described below that
Not constituting conflict between this can just be mutually combined.
The invention discloses a kind of communication means of full duplex relaying system and full duplex relaying system, in information source and complete pair
It is total using adaptive power control method or system based on information-interference and coupling characteristic during the power distribution of work via node
Combined signal source-relay power distribution method under power consumption confined condition.In order to improve between information source apart from each other and the stay of two nights
Communication quality, the present invention assists forwarding source signal, Ke Yiyou by disposing full duplex relaying node between information source and the stay of two nights
Effect improves conventional half duplex relay system spectrum efficiency.Because full duplex relaying node a time slot can be received before forwarding
While source signal, the new signal of current time slots information source transmission is received and decodes, therefore the signal that relaying is sent can connect to it
The signal of receipts produces loop self-interference, thus causes the coupling between the transmission of " relaying-stay of two nights " and " information source-relaying " this double bounce
Property.On the one hand, if full duplex relaying transmission power is too small, the communication quality of " relaying-stay of two nights " link can be damaged；The opposing party
Face, if via node transmission power is too high, easily causes that loop self-interference is too strong, and then damages " information source-relaying " link
Communication quality.In consideration of it, in order to balance the relation between the transmission of " information source-relaying " " relaying-stay of two nights " this double bounce, ensureing set
Optimize system energy efficiency on the premise of communication quality, the present invention proposes a kind of joint letter under total system power consumption confined condition
The adaptive power control method of source-relay power distribution method and use based on information-interference and coupling characteristic.By reasonable
Ground carries out the power distribution between information source and relaying, and system can be obviously improved system in the case where meeting target outage probability
Energy efficiency.
As shown in figure 1, system includes information source S, stay of two nights D and full duplex relaying node R.Relaying R is deployed in information source S and the stay of two nights
D centre, the signal that information source is sent needs to be transmitted to the stay of two nights by " information source-relaying ", " relaying-stay of two nights " this double bounce, shortens list
Jump communication link distance, be effectively improved information source S and relaying D be distant or channel conditions it is not good caused by under communication quality
Drop, the communication quality and robustness of lifting system.
Because via node R is operated in full duplex state, via node R being capable of a time slot is received before forwarding signal
While, receive and decode the new signal of current time information source transmission.Therefore, the signal that the signal that relaying is sent can be received to it
Loop self-interference is produced, causes the coupling for receiving signal and forward signal.
In time slot t=1, information source S produces signal x (t) and with power PSX (t) is sent to and relays R, R enters to signal x (t)
Row is received and decoded；
In time slot t=t+1, t >=1, relaying R is by the signal x (t) being successfully decoded with power PRIt is sent to stay of two nights D.It is same with this
When, information source S produces new signal x (t+1) and with power PSX (t+1) is sent to and relays R, R is received to signal x (t+1)
And decode.Because relaying R is operated in full-duplex mode, therefore, the signal that the signal that relaying is sent can be received to it produces loop
Self-interference, causes the coupling for receiving signal and forward signal.
It is illustrated in figure 2 a kind of flow signal of communication means of full duplex relaying system disclosed in the embodiment of the present invention
Figure, includes in the method shown in Fig. 2：
S1, in time slot t=1, information source S produces signal x (t), and with power PSSignal x is sent to full duplex relaying node R
(t), signal x (t) is received and decoded by full duplex relaying node R, wherein, power PSBy default power distribution strategies
It is determined that；
If S2, full duplex relaying node R can be successfully decoded, step S3 is performed, step S4 is otherwise performed；
S3, in time slot t+1, full duplex relaying node R is with power PRThe signal x (t) of successfully decoded is sent to stay of two nights D, together
Shi Xinyuan S are with power PSThe new signal x (t+1) produced is sent to full duplex relaying node R, by full duplex relaying node R in letter
Signal x (t+1) is received and decoded under number x (t) loop self-interference, step S5 is then performed, wherein, power PRBy pre-
If power distribution strategies determine；
The signal y' received in the time slot, stay of two nights D, relaying RR(t+1)、yD(t+1) it is respectively：
Wherein, gS,R、gR,DRespectively information source S to relaying R, relaying R are to stay of two nights D channel gain, gR,RFor via node R
Loop self-interference channel gain.nR、nDAdditive white Gaussian noise at respectively relaying R and stay of two nights D.
Relaying R can be by the use of decoded signal x (t) as prior information, and the signal that R receptions are relayed to time slot t+1 enters
Row loop self-interference is eliminated.But it is due to the limitation of near-far interference and real system, it is certainly dry that loop can not be completely eliminated in relaying R
Disturb, therefore relaying R is an actually-received the power definition of loop self-interference for PSI=PR 1-μ, 0 ＜ μ ＜ 1, wherein, μ is bigger, represents
Remaining self-interference intensity is smaller；μ is smaller, represents that remaining self-interference intensity is bigger.Therefore, the signal of the relaying actual receptions of R is：
Because the signal x (t) of information source S transmissions is successfully decoded in time slot t by relaying R, therefore in time slot t+1, relaying R is to letter
, can be by the loop itself produced due to forward signal x (t) to stay of two nights D when the new signal x (t+1) that source S is sent is received
Self-interference.Therefore, in time slot t+1, when there is loop self-interference in relaying R, the probability P of successfully decoded11And decoding failure
Probability P10It is expressed as：
Wherein, RTFor the nominal data transfer rates of source signal.
S4, in time slot t+1, information source S is with power PSThe new signal x (t+1) produced is sent to full duplex relaying node R, by
Full duplex relaying node R is received and decoded to signal x (t+1), then performs step S5；
In time slot t+1, because in time slot t the signal x (t) of information source S transmissions can not be successfully decoded in relaying R, therefore relaying R is only
Attempt to receive and decode the new signal x (t+1) that information source S is sent.Therefore, signal is successfully decoded in loop free self-interference in relaying R
X (t+1) probability P01And the probability P of decoding failure00It can be expressed as：
P01=Pr { log2(1+|gS,R|2PS)≥RT}
P00=Pr { log2(1+|gS,R|2PS)<RT}
S5, judge whether signals transmission completes, if completing, perform step S6；Otherwise, return and perform step S2；
S6, the signal for judging the newest reception of the via node R success decoding, if being successfully decoded, the relaying
Node R is with power PRThe signal being successfully decoded is transmitted to stay of two nights D, terminates transmitting procedure；Otherwise, transmitting procedure is directly terminated.
Wherein, due between information source S and stay of two nights D distant or channel quality it is poor, it is direct between " information source-stay of two nights "
Link is not considered in the present invention.Therefore stay of two nights D receive from relaying R signal when only by additive white Gaussian noise
Interference.Therefore, the probability P of the signal from relaying R can be successfully decoded in stay of two nights DdFor：Pd=Pr { log2(1+|gR,D|2PR)≥
RT}。
Preferably, in the present invention two kinds of information sources and relay power distribution method are provided, is respectively：
Adaptive tracking control method based on information-interference and coupling characteristic：Because relaying R works in full-duplex mode,
Therefore in time slot t+1, relay forwarding can receive the information signal x (t+1) from information source to it to stay of two nights D information signal x (t)
Loop self-interference is produced, the coupling between information signal and self-interference signal is thus produced.On the one hand, if using in higher
After transmission power, although the communication quality of " relaying-stay of two nights " link can be lifted, but during higher repeat transmitted power can be given
Even more serious loop self-interference is brought after R.On the other hand, if using relatively low repeat transmitted power, although can reduce
R loop self-interference influence is relayed, still the communication quality of " relaying-stay of two nights " link can not just be guaranteed.Therefore, in setting
Information source S transmission powers PSAfterwards, suitable repeat transmitted power can be selected by the optimal energy allocation of full duplex relaying
The overall performance of lifting system, wherein, transmission power PSSetting value can be determined according to the actual requirements.
The power that R transmission signal will be relayed is denoted as PR, and there is PR∈[0,Pmax], PmaxIt is that relaying R can reach most
Big transmission power.The transmission power that system is relayed by Self Adaptive Control, on the premise of target outage probability is reached, reduction is not
Necessary system energy consumption, optimizes the energy efficiency of system, and wherein target outage probability can be determined according to the actual requirements.
Preferably, Ke YiyouAsk for so that the energy efficiency EE of system corresponding P when being optimalRValue
It is used as target PRValue.
Combined signal source-relay power distribution method under total system power consumption confined condition：Due to information signal and self-interference
Coupled characteristic between signal, can cause the mutual restriction between the transmission of " information source-relaying " and " relaying-stay of two nights " this double bounce, because
The setting of this full duplex relaying R transmission powers is particularly significant.In order to balance between " information signal " and " interference signal ", and
Relation between the transmission of " information source-relaying " and " relaying-stay of two nights " this double bounce, the patent proposes a kind of full duplex relaying system is total
The power distribution method of combined signal source-relaying under power consumption confined condition.The total power consumption of each time slot of system is designated as P, information source S
The power of transmission signal is denoted as PS, and PS=α P, then P can be expressed as by relaying R transmission powerR=(1- α) P.
Transmission power so by one suitable α value of selection for configuring information source and relaying, and then balance " information source-
Relation between relaying " and the transmission of " relaying-stay of two nights " this double bounce, can make system on the premise of target outage probability is reached,
The unnecessary system energy consumption of reduction, optimizes the energy efficiency of system.
Preferably, Ke YiyouAsk for so that the energy efficiency EE of system corresponding α values when being optimal
It is used as target α values.
Consider any time slot t, definition relaying decoding source signal x (t) probability of success is π1, probability of failure is π0, then：
So overall average interrupt probability P of systemoutIt can be expressed as
Pout=π0+π1(1-Pd)
The energy efficiency EE of system is defined as consuming the data volume that unit energy is capable of Successful transmissions, i.e.,
For above two power setting method, suitable repeat transmitted power P is chosenROr power partition coefficient α so that
System energy efficiency EE is optimal, you can optimized under total system power consumption confined condition by the power distribution between information source and relaying
The energy efficiency of system.
As shown in figure 3, being the repeat transmitted power under the adaptive tracking control method based on information-interference and coupling characteristic
With the relation between system break probability.Information source transmission power is 35dB, from the figure, it can be seen that certain in information source transmission power
On the premise of, the transmission power of continuous improvement relaying, the trend that the outage probability presentation of system rises after falling before, this is due to
When repeat transmitted power is too small, the link-quality of " relaying-stay of two nights " can be influenceed, and when repeat transmitted power is too big, relaying
The transmission power of forward signal can cause strong self-interference.Under identical information source, repeat transmitted power, with the increase of μ values,
Downward trend is presented in the outage probability of system, and this is due to that μ values are bigger, and the remaining loop self-interference of relaying is smaller, therefore system
Outage probability is reduced.In addition, with the increase of μ values, increased trend is presented in best relay transmission power, and this is due to that μ values are got over
Greatly, relay forwarding signal is smaller to the remaining self-interference of itself, i.e. coupling between " information source-relaying " and " relaying-stay of two nights " double bounce
Conjunction degree is smaller, and appropriate lifting repeat transmitted power can be more than " information source-relaying " to the gain that the link of " relaying-stay of two nights " is brought
In the loss that brings of link, therefore optimal transmission power can increase the trend that rising is presented with μ values.
As shown in figure 4, being the repeat transmitted power under the adaptive tracking control method based on information-interference and coupling characteristic
Relation between system energy efficiency.Information source transmission power is 35dB, from the figure, it can be seen that before information source transmission power is certain
Put, improve constantly the transmission power of relaying, downward trend after first rising, its reason and figure three-phase is presented in the efficiency of system
Together.But as can be seen from the figure Fig. 4 optimal transmission power can be significantly less than figure three, this is due to when system energy efficiency reaches most
When big, continue to increase repeat transmitted power, system, which needs to increase substantial amounts of power consumption, can just bring the decline of a little outage probability.This
Outside, with the increase of μ values, ascendant trend is presented in the efficiency of system.
As shown in figure 5, being the power point under combined signal source-relay power distribution method under total system power consumption confined condition
Relation between distribution coefficient and system break probability.From the figure, it can be seen that under conditions of total system power consumption is limited, system meeting
Make it that system break probability is minimum in the presence of an optimal power contribution coefficient, power partition coefficient α is excessive or too small, can all make be
Outage probability of uniting increases.Because when α is too big, system is too small to the transmission power of relay distribution, " relaying-letter have impact on
The communication quality of place " link.Because when α is too small, system is too small to the transmission power that information source is distributed, have impact on " information source-
The communication quality of relaying " link.The total power consumption of system can also influence power partition coefficient α setting, when system total transmission power
During increase, optimal power partition coefficient α can reduce therewith, because the transmission power of increase relaying, gives system " relaying-stay of two nights "
The lifting that link communication quality is brought increases the shadow brought to " information source-relaying " link communication quality much larger than relaying self-interference
Ring.
As shown in fig. 6, being the power point under combined signal source-relay power distribution method under total system power consumption confined condition
Relation between distribution coefficient and system capability efficiency.From the figure, it can be seen that under conditions of total system power consumption is limited, system meeting
Cause system energy efficiency maximum in the presence of an optimal power contribution coefficient, when power partition coefficient α is excessive or too small, can all make system
Efficiency is reduced.On the premise of total system power consumption is certain, the outage probability and energy efficiency of system are inversely proportional.From figure also
As can be seen that when the timing of system power distribution coefficient one, during total system power consumption increase, system energy efficiency is not necessarily lifted.
As it will be easily appreciated by one skilled in the art that the foregoing is merely illustrative of the preferred embodiments of the present invention, it is not used to
The limitation present invention, any modifications, equivalent substitutions and improvements made within the spirit and principles of the invention etc., it all should include
Within protection scope of the present invention.
Claims (10)
1. a kind of communication means of full duplex relaying system, it is characterised in that including：
S1, in time slot t=1, information source S produces signal x (t), and with power PSSignal x (t) is sent to full duplex relaying node R, by
The full duplex relaying node R is received and decoded to signal x (t), wherein, the power PSBy default power distribution plan
Slightly determine；
If S2, the full duplex relaying node R can be successfully decoded, step S3 is performed, step S4 is otherwise performed；
S3, in time slot t+1, the full duplex relaying node R is with power PRThe signal x (t) of successfully decoded is sent to stay of two nights D, simultaneously
The information source S is with the power PSThe new signal x (t+1) produced is sent to the full duplex relaying node R, by the full duplex
Via node R is received and decoded to signal x (t+1) under signal x (t) loop self-interference, then performs step S5, its
In, the power PRDetermined by the default power distribution strategies；
S4, in time slot t+1, the information source S is with the power PSNew signal x (the t produced are sent to the full duplex relaying node R
+ 1), signal x (t+1) is received and decoded by the full duplex relaying node R, step S5 is then performed；
S5, judge whether source signal transmitting procedure completes, if completing, perform step S6；Otherwise, return and perform step S2；
S6, the signal for judging the newest reception of the via node R success decoding, if being successfully decoded, the via node R
With power PRThe signal being successfully decoded is transmitted to stay of two nights D, terminates transmitting procedure；Otherwise, transmitting procedure is directly terminated.
2. according to the method described in claim 1, it is characterised in that the power PSBy default power distribution strategies determine with
And the power PRDetermined by the default power distribution strategies, including：
Set the transmission power P of the information source SS, and adaptively adjust the transmission power P of the full duplex relaying node RR, with
On the premise of reaching target outage probability, it is optimal the energy efficiency EE of system, wherein PR∈[0,Pmax], PmaxIt is described
The maximum transmission power that full duplex relaying node R can reach.
3. method according to claim 2, it is characterised in that the transmission power PRAcquiring method be：
ByAsk for so that the energy efficiency EE of system corresponding P when being optimalRValue is used as target PRValue.
4. according to the method described in claim 1, it is characterised in that the power PSBy default power distribution strategies determine with
And the power PRDetermined by the default power distribution strategies, including：
By the transmission power P of the information source SSIt is set as PS=α P, the transmission power setting by the full duplex relaying node R is
PR=(1- α) P, wherein, P represents total power consumption of the system in each time slot, and α represents power-division ratios.
5. method according to claim 4, it is characterised in that the acquiring method of the α values is：
ByAsk for so that the energy efficiency EE of system when being optimal corresponding α values as target α values.
6. the method according to claim 3 or 5, it is characterised in that the energy efficiency EE of system acquiring method is：
For any time slot t, the probability π that source signal x (t) is successfully decoded in the full duplex relaying node R is obtained1And failure
Probability π0：Wherein, P10Represent that the full duplex relaying node R has loop self-interference
When, decode the probability of failure, P in time slot t+101When representing that loop self-interference is not present in the full duplex relaying node R, in time slot
The probability that t+1 can be successfully decoded；
By π0With π1Obtain the overall average interrupt probability P of systemout：Pout=π0+π1(1-Pd), wherein, PdRepresent the stay of two nights D
The probability of the signal from the full duplex relaying node R can be successfully decoded；
By the overall average interrupt probability P of systemoutAnd system obtains the energy efficiency of system in the total power consumption P of each time slot
EE：Wherein, EE represents to consume the data volume that unit energy is capable of Successful transmissions, RTRepresent the information source S
The nominal data transfer rates of signal.
7. method according to claim 6, it is characterised in that the full duplex relaying node R has loop self-interference
When, can be to the probability P of signal x (t+1) successfully decoded in time slot t+111And the probability P of decoding failure10Respectively：
<mrow>
<msub>
<mi>P</mi>
<mn>11</mn>
</msub>
<mo>=</mo>
<mi>Pr</mi>
<mo>{</mo>
<msub>
<mi>log</mi>
<mn>2</mn>
</msub>
<mrow>
<mo>(</mo>
<mn>1</mn>
<mo>+</mo>
<mfrac>
<mrow>
<mo>|</mo>
<msub>
<mi>g</mi>
<mrow>
<mi>S</mi>
<mo>,</mo>
<mi>R</mi>
</mrow>
</msub>
<msup>
<mo>|</mo>
<mn>2</mn>
</msup>
<msub>
<mi>P</mi>
<mi>S</mi>
</msub>
</mrow>
<mrow>
<mo>|</mo>
<msub>
<mi>g</mi>
<mrow>
<mi>R</mi>
<mo>,</mo>
<mi>R</mi>
</mrow>
</msub>
<msup>
<mo>|</mo>
<mn>2</mn>
</msup>
<msub>
<mi>P</mi>
<mrow>
<mi>S</mi>
<mi>I</mi>
</mrow>
</msub>
<mo>+</mo>
<mn>1</mn>
</mrow>
</mfrac>
<mo>)</mo>
</mrow>
<mo>&GreaterEqual;</mo>
<msub>
<mi>R</mi>
<mi>T</mi>
</msub>
<mo>}</mo>
</mrow>
<mrow>
<msub>
<mi>P</mi>
<mn>10</mn>
</msub>
<mo>=</mo>
<mn>1</mn>
<mo>-</mo>
<msub>
<mi>P</mi>
<mn>11</mn>
</msub>
<mo>=</mo>
<mn>1</mn>
<mo>-</mo>
<mi>Pr</mi>
<mo>{</mo>
<msub>
<mi>log</mi>
<mn>2</mn>
</msub>
<mrow>
<mo>(</mo>
<mn>1</mn>
<mo>+</mo>
<mfrac>
<mrow>
<mo>|</mo>
<msub>
<mi>g</mi>
<mrow>
<mi>S</mi>
<mo>,</mo>
<mi>R</mi>
</mrow>
</msub>
<msup>
<mo>|</mo>
<mn>2</mn>
</msup>
<msub>
<mi>P</mi>
<mi>S</mi>
</msub>
</mrow>
<mrow>
<mo>|</mo>
<msub>
<mi>g</mi>
<mrow>
<mi>R</mi>
<mo>,</mo>
<mi>R</mi>
</mrow>
</msub>
<msup>
<mo>|</mo>
<mn>2</mn>
</msup>
<msub>
<mi>P</mi>
<mrow>
<mi>S</mi>
<mi>I</mi>
</mrow>
</msub>
<mo>+</mo>
<mn>1</mn>
</mrow>
</mfrac>
<mo>)</mo>
</mrow>
<mo>&GreaterEqual;</mo>
<msub>
<mi>R</mi>
<mi>T</mi>
</msub>
<mo>}</mo>
</mrow>
The full duplex relaying node R is in loop free self-interference, in probability Ps of the time slot t+1 to signal x (t+1) successfully decoded01
And the probability P of decoding failure00Respectively：
P01=Pr { log2(1+|gS,R|2PS)≥RT}
P00=Pr { log2(1+|gS,R|2PS)<RT}
Wherein, gS,RFor the information source S to the channel gain of the full duplex relaying node R, gR,RFor the full duplex relaying section
Point R loop self-interference channel gain, PSI=PR 1-μRepresent that the full duplex relaying node R is an actually-received loop self-interference
Power, 0 ＜ μ ＜ 1, RTFor the nominal data transfer rates of the information source S signals.
8. method according to claim 7, it is characterised in that the stay of two nights D can be successfully decoded from the full duplex
The probability P of via node R signaldFor：Pd=Pr { log2(1+|gR,D|2PR)≥RT, wherein, gR,DFor the full duplex relaying
Channel gain of the node R to the stay of two nights D.
9. method according to claim 8, it is characterised in that P11、P10、P01And P00By the full duplex relaying node R
In the signal y of the actual receptions of time slot t+1R(t+1) ask for obtaining, PdThe signal y received by the stay of two nights D in time slot t+1D(t+1)
Ask for obtaining, wherein：
<mrow>
<msub>
<mi>y</mi>
<mi>D</mi>
</msub>
<mrow>
<mo>(</mo>
<mi>t</mi>
<mo>+</mo>
<mn>1</mn>
<mo>)</mo>
</mrow>
<mo>=</mo>
<msub>
<mi>g</mi>
<mrow>
<mi>R</mi>
<mo>,</mo>
<mi>D</mi>
</mrow>
</msub>
<msqrt>
<msub>
<mi>P</mi>
<mi>R</mi>
</msub>
</msqrt>
<mi>x</mi>
<mrow>
<mo>(</mo>
<mi>t</mi>
<mo>)</mo>
</mrow>
<mo>+</mo>
<msub>
<mi>n</mi>
<mi>D</mi>
</msub>
<mrow>
<mo>(</mo>
<mi>t</mi>
<mo>+</mo>
<mn>1</mn>
<mo>)</mo>
</mrow>
<mo>;</mo>
</mrow>
Signal x (t+1) is received in view of forward signal x (t) to the purpose of full duplex relaying node R described in time slot t+1 to produce
Loop self-interference, therefore, the signal y of the actual reception of full duplex relaying node RR(t+1) it is：
Wherein, nRFor the additive white Gaussian noise at the full duplex relaying node R, nDFor the additive white gaussian at the stay of two nights D
Noise.
10. a kind of full duplex relaying system, it is characterised in that including：Information source S, stay of two nights D and full duplex relaying node R；
Wherein, the full duplex relaying node R is deployed between the information source S and the stay of two nights D；
The full duplex relaying system is used to perform the method as described in claim 1 to 9 any one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710439182.6A CN107295623B (en) | 2017-06-12 | 2017-06-12 | The communication means and full duplex relaying system of a kind of full duplex relaying system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710439182.6A CN107295623B (en) | 2017-06-12 | 2017-06-12 | The communication means and full duplex relaying system of a kind of full duplex relaying system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107295623A true CN107295623A (en) | 2017-10-24 |
| CN107295623B CN107295623B (en) | 2018-04-20 |
Family
ID=60096456
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710439182.6A Active CN107295623B (en) | 2017-06-12 | 2017-06-12 | The communication means and full duplex relaying system of a kind of full duplex relaying system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107295623B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109586890A (en) * | 2019-01-04 | 2019-04-05 | 上海纳雅智能科技有限公司 | A kind of multiple wireless duplex communication method and system |
| CN109951266A (en) * | 2019-01-22 | 2019-06-28 | 西安外事学院 | A kind of full duplex both-way relay method based on QAM modulation |
| CN111970740A (en) * | 2020-08-04 | 2020-11-20 | 汕头大学 | Wireless relay communication system |
| CN114337877A (en) * | 2022-01-10 | 2022-04-12 | 重庆邮电大学 | CR-NOMA communication system performance optimization method based on full-duplex relay |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103747448A (en) * | 2013-12-12 | 2014-04-23 | 东南大学 | Method for optimizing energy efficiency in mobile communication network |
| CN104284407A (en) * | 2014-10-28 | 2015-01-14 | 中国矿业大学 | Power control method embedded into D2D cellular network and based on full-duplex relay |
| CN104852793A (en) * | 2015-04-04 | 2015-08-19 | 华中科技大学 | Virtual full-duplex relay transmission method based on half-duplex multipath cooperative system |
| CN106301520A (en) * | 2016-07-27 | 2017-01-04 | 华中科技大学 | A kind of communication means based on the many relay systems of full duplex |
-
2017
- 2017-06-12 CN CN201710439182.6A patent/CN107295623B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103747448A (en) * | 2013-12-12 | 2014-04-23 | 东南大学 | Method for optimizing energy efficiency in mobile communication network |
| CN104284407A (en) * | 2014-10-28 | 2015-01-14 | 中国矿业大学 | Power control method embedded into D2D cellular network and based on full-duplex relay |
| CN104852793A (en) * | 2015-04-04 | 2015-08-19 | 华中科技大学 | Virtual full-duplex relay transmission method based on half-duplex multipath cooperative system |
| CN106301520A (en) * | 2016-07-27 | 2017-01-04 | 华中科技大学 | A kind of communication means based on the many relay systems of full duplex |
Non-Patent Citations (1)
| Title |
|---|
| 葛佳等: "全双工双向中继系统的功率分配方案", 《上海师范大学学报(自然科学版)》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109586890A (en) * | 2019-01-04 | 2019-04-05 | 上海纳雅智能科技有限公司 | A kind of multiple wireless duplex communication method and system |
| WO2020140426A1 (en) * | 2019-01-04 | 2020-07-09 | 上海纳雅智能科技有限公司 | Multipath wireless full duplex communication method and system |
| CN109951266A (en) * | 2019-01-22 | 2019-06-28 | 西安外事学院 | A kind of full duplex both-way relay method based on QAM modulation |
| CN111970740A (en) * | 2020-08-04 | 2020-11-20 | 汕头大学 | Wireless relay communication system |
| CN114337877A (en) * | 2022-01-10 | 2022-04-12 | 重庆邮电大学 | CR-NOMA communication system performance optimization method based on full-duplex relay |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107295623B (en) | 2018-04-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106535284B (en) | It is a kind of based on full duplex relaying D2D communication in Poewr control method | |
| CN107295623A (en) | The communication means and full duplex relaying system of a kind of full duplex relaying system | |
| CN101656600B (en) | Implementation method of opportunistic cooperation diversity protocol based on reinforced selective amplification-forwarding | |
| CN104284407B (en) | Poewr control method based on full duplex relaying in the cellular network of embedded D2D | |
| CN106413099B (en) | The optimal power allocation method of full duplex cooperative relay network | |
| CN109451492B (en) | Safety transmission method based on artificial noise and beam forming in downlink full-duplex relay network | |
| CN106301520B (en) | A kind of communication means based on many relay systems of full duplex | |
| WO2009077863A3 (en) | Power control at a relay station in a wireless network | |
| CN102883451A (en) | Cross layer design method of up resources of shared system by terminal direction connection technology | |
| CN107332602B (en) | Full duplex relaying energy under the conditions of energy constraint reclaims communication means and system certainly | |
| CN110290558B (en) | Safe transmission method based on time delay in cache-assisted multi-relay transmission system | |
| CN104967472B (en) | The optimal power allocation and relaying dispositions method of the two-way decoding forward relay of full duplex | |
| CN109039411A (en) | A kind of unidirectional full duplex MIMO relay antenna selection safe transmission method | |
| CN108271206B (en) | Relay node selection method based on threshold detection | |
| CN107819738A (en) | Safety of physical layer control method based on power distribution in full duplex relaying system | |
| CN106961738A (en) | Power and frequency spectrum distributing method based on the bit error rate in a kind of cooperative cognitive network | |
| Tran et al. | Swipt-based cooperative noma for two-way relay communications: Psr versus tsr | |
| CN104010341B (en) | It is a kind of to be used to efficiently cooperate with the relay selection and Poewr control method in cast communication | |
| CN103228034B (en) | Based on the Small Section Mode method for communication of mobile communication system of UE classification | |
| CN110768759A (en) | Hybrid duplex relay-assisted D2D communication method | |
| US20110199956A1 (en) | Radio communication method, system and apparatus for reusing channel resource | |
| CN105873206B (en) | A kind of the honeycomb junction network model and power distribution method of extensive MIMO transmission | |
| CN110740502A (en) | method for controlling node transmitting power of full duplex bidirectional relay system | |
| CN104837194B (en) | A kind of bidirectional relay system power distribution method based on AF mechanism | |
| CN110278019A (en) | The full duplex energy acquisition relay transmission method of criterion is minimized based on self-interference |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |