CN107333315A - The cooperation transmission method and system of bandwidth are shared in EH collection of energy collaborative networks - Google Patents
The cooperation transmission method and system of bandwidth are shared in EH collection of energy collaborative networks Download PDFInfo
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- CN107333315A CN107333315A CN201710573880.5A CN201710573880A CN107333315A CN 107333315 A CN107333315 A CN 107333315A CN 201710573880 A CN201710573880 A CN 201710573880A CN 107333315 A CN107333315 A CN 107333315A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W40/00—Communication routing or communication path finding
- H04W40/02—Communication route or path selection, e.g. power-based or shortest path routing
- H04W40/04—Communication route or path selection, e.g. power-based or shortest path routing based on wireless node resources
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/06—Optimizing the usage of the radio link, e.g. header compression, information sizing, discarding information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W40/00—Communication routing or communication path finding
- H04W40/02—Communication route or path selection, e.g. power-based or shortest path routing
- H04W40/04—Communication route or path selection, e.g. power-based or shortest path routing based on wireless node resources
- H04W40/08—Communication route or path selection, e.g. power-based or shortest path routing based on wireless node resources based on transmission power
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W40/00—Communication routing or communication path finding
- H04W40/02—Communication route or path selection, e.g. power-based or shortest path routing
- H04W40/04—Communication route or path selection, e.g. power-based or shortest path routing based on wireless node resources
- H04W40/10—Communication route or path selection, e.g. power-based or shortest path routing based on wireless node resources based on available power or energy
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W40/00—Communication routing or communication path finding
- H04W40/02—Communication route or path selection, e.g. power-based or shortest path routing
- H04W40/22—Communication route or path selection, e.g. power-based or shortest path routing using selective relaying for reaching a BTS [Base Transceiver Station] or an access point
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- 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 present invention provides the cooperation transmission method and system that bandwidth is shared in a kind of EH collection of energy collaborative network, and its method includes：Source node is set up to via node and the via node to the link connection relation of destination node, wherein, the via node can forward the data of the source node, and via node data of itself can be also sent simultaneously；Judge whether the message transmission rate of the via node meets the rate requirement for participating in cooperation transmission, and judge whether the energy of the via node is met while forwarding the data of the source node and sending the energy needed for the data of itself, if be satisfied by, the via node is selected to carry out data forwarding.The present invention is proposed in wireless EH cooperation communication systems, on the premise of via node own data transmission speed is ensured, the bandwidth distributed by using source node realizes the new method of cooperation source node transmission, it is not necessary to new bandwidth resources are distributed, with scientific value and realistic meaning.
Description
Technical field
The invention mainly relates to wireless communication technology field, and in particular to band is shared in a kind of EH collection of energy collaborative network
Wide cooperation transmission method and system.
Background technology
In cooperative communication network, via node is probably fixed, it is also possible to mobile, when via node is mobile
During node, it is difficult to obtain stable supply of electric power, in now being obtained using EH (Energy Harvesting) energy collection technology
It is very necessary after the energy needed for communication, stand-by time can effectively be extended by obtaining energy using EH technologies.In wireless EH
In cooperative communication network, via node can both forward the data from source node, while the data of own service can be launched,
Then need rationally to utilize resource.In traditional cooperation communication system, when discussing fixed-bandwidth and power, source node
Cooperation transmission during bandwidth is shared with via node, because the via node electric power of wireless EH cooperative communication networks comes from node certainly
The energy that body is collected, therefore it is not suitable for wireless EH cooperation communication systems.In wireless EH cooperation communication systems, resource allocation is asked
Topic will not only consider the characteristic of channel, and consider collection of energy characteristic, so as to increase the difficulty for solving problems.
The content of the invention
There is provided the cooperation transmission that bandwidth is shared in a kind of EH collection of energy collaborative network for above-mentioned technical problem by the present invention
Method and system.
The technical scheme that the present invention solves above-mentioned technical problem is as follows：Bandwidth is shared in a kind of EH collection of energy collaborative network
Cooperation transmission method, comprise the following steps：
Source node is set up to via node and the via node to the link connection relation of destination node, wherein, it is described
Via node can forward the data of the source node, and via node data of itself can be also sent simultaneously；
Judge whether the message transmission rate of the via node meets the rate requirement for participating in cooperation transmission, and judge institute
Whether the energy for stating via node is met while forward the data of the source node and send the energy needed for the data of itself,
If be satisfied by, the via node is selected to carry out data forwarding.
The beneficial effects of the invention are as follows：Propose in wireless EH cooperation communication systems, ensureing via node its data
On the premise of transmission rate and energy, the bandwidth distributed by using source node realizes the new method of cooperation source node transmission,
New bandwidth resources need not be distributed, with scientific value and realistic meaning.
On the basis of above-mentioned technical proposal, the present invention can also do following improvement.
Further, judge whether the message transmission rate of the via node meets the rate requirement bag for participating in cooperation transmission
Include：
Calculate the message transmission rate that the source node directly transfers data to destination node；
And calculate the message transmission rate that the via node participates in forwarding the source node data during cooperation transmission；
If the via node participate in forwarding during cooperation transmission the message transmission rate of the source node data be more than or
Equal to the data transfer speed of the message transmission rate that the source node directly transfers data to destination node, the then via node
Rate meets the rate requirement for participating in cooperation transmission.
Beneficial effect using above-mentioned further scheme is：The requirement of message transmission rate and wanting for energy need to be met simultaneously
Ask, it is ensured that stability of the via node when participating in cooperation transmission.
Further, it is described to calculate the message transmission rate that via node participates in forwarding the source node data during cooperation transmission
Including：
Principle is preferentially sent according to its data, via node in the case of via node participates in cooperation transmission is calculated and sends certainly
The message transmission rate of body data, and via node participation cooperation transmission is calculated according to the message transmission rate for sending its data
In the case of the transmission power that is provided for its data；
And be certainly by the maximum transmission power and via node of via node in the case of via node participates in cooperation transmission
The difference for the transmission power that body data are provided, obtains maximum transmission power of the via node forwarding from source node data；
And forward the maximum transmission power from source node data to calculate via node participation cooperation biography according to via node
The message transmission rate of the source node data is forwarded when defeated.
Beneficial effect using above-mentioned further scheme is：In the case of via node participates in cooperation transmission, calculate first
The message transmission rate and transmission power of via node self transmission, then calculate via node forwarding from source node data most
Big transmission power, finally obtains the message transmission rate that via node participates in forwarding source node data during cooperation transmission, Neng Goubao
Demonstrate,prove via node and meet the demand for assisting source node forwarding simultaneously under the demand for meeting self transmission.
Further, the message transmission rate that the calculating source node directly transfers data to destination node includes：
The message transmission rate that the source node directly transfers data to destination node is
Wherein, WsFor the bandwidth of source node, if the noise power spectral density of source node, via node and destination node is equal, N0For noise
Power spectral density, PsFor the transmission power of source node, gsdFor the channel gain of source node to destination node link.
Beneficial effect using above-mentioned further scheme is：The requirement of cooperation can be participated in order to meet via node, is needed
The message transmission rate that source node directly transfers data to destination node is calculated, then is forwarded when participating in cooperation transmission with via node
The message transmission rate of source node data is compared to determine, it is ensured that via node assists the stability of transmitting procedure and excellent
Change distribution.
Further, it is described to calculate the data biography that via node participates in via node transmission its data in the case of cooperation transmission
Defeated speed, and it is itself number to be calculated according to the message transmission rate for sending its data in the case of via node participates in cooperation transmission
Include according to the transmission power of offer：
Principle is preferentially sent according to its data, via node sends itself number in the case of via node participates in cooperation transmission
According to message transmission rate beWrFor the bandwidth of via node, PselfFor relaying
Node participates in the transmission power provided in the case of cooperation transmission for its data, gselfParticipate in passing in the case of cooperation transmission for via node
The channel gain of defeated its data, if the noise power spectral density of source node, via node and destination node is equal, N0For noise power
Spectrum density, and Via node sends its data most in the case of participating in cooperation transmission for via node
Low transmission power, according to formulaCalculating is obtained
WrFor the bandwidth of via node, δ is the minimum transmission speed that via node participates in via node transmission its data in the case of cooperation transmission
Rate value, according to formulaCalculating is obtained
Further, the maximum transmission power of the via node forwarding from source node data that obtain includes：
The maximum transmission power of via node is in the case of via node participation cooperation transmissionWherein, Er
For the energy storage value of via node energy accumulator, T is the transmission time of a time slot, and Er≤Emax, EmaxFor via node energy
The maximum energy storage value of memory is measured, then via node forwarding is from source node data in the case of via node participates in cooperation transmission
Maximum transmission power is Pf,max=Pmax-Pself, wherein, PselfIt is its data in the case of participating in cooperation transmission for via node
The transmission power of offer.
Further, it is described to forward the maximum transmission power from source node data to calculate via node ginseng according to via node
The message transmission rate of the source node data is forwarded during with cooperation transmission to be included：
Maximum transmission power of the via node forwarding from source node data is in the case of via node participates in cooperation transmission
Pf,max=Pmax-Pself, wherein, PmaxThe maximum transmission power of via node in the case of cooperation transmission is participated in for via node,
PselfThe transmission power for participating in providing for its data in the case of cooperation transmission for via node；
Work as Pf,maxWhen≤0, to PselfValue be adjusted, whenWhen, now Pf,maxStill less than or be equal to
0, then via node be not involved in cooperation transmission；
Work as PselfValue adjust to causing Pf,max>When 0, source node is saved to relaying in the case of via node participates in cooperation transmission
The message transmission rate of point linkPsFor the transmitting work(of source node
Rate, gsrFor the channel gain of source node to via node link, α is the bandwidth ratio that source node distributes to via node, and α is real
Number and 0<α<1；
Via node participates in forwarding data rate of the via node forwarding from source node data in the case of cooperation transmission
Message transmission rate of the repeated link transmission from source node data is Rc=min (Rsr,Rrd), min (A, B) is represented
Less value is selected in A and B.
Further, judge whether the energy of the via node is met while forwarding data and the transmission of the source node
Energy needed for the data of itself, specific method is：
Calculate the via node and participate in the transmission rate R that via node during cooperation transmission sends its dataself, and
Repeated link transmits the message transmission rate R from source node datacIf, the maximum workable general power of via nodeDisclosure satisfy that makes Rself>=δ, and Rc≥Rnc-sdRequired general power, then the energy satisfaction of the via node is same
When forward the data of the source node and send the energy needed for the data of itself, wherein, PmaxParticipate in cooperating for via node
The maximum transmission power of via node, E in the case of transmissionrFor the energy storage value of via node energy accumulator, T is a time slot
Transmission time, δ is the minimum transmission rate value that via node participates in via node transmission its data in the case of cooperation transmission,
Rnc-sdWhen being not involved in cooperation transmission for via node, data rate of the source node to destination node link transmission data.
Beneficial effect using above-mentioned further scheme is：When the energy that via node is collected meets condition, selection should
Via node carries out data forwarding, it is ensured that the stability of transmission and optimization distribution.
Further, in addition in the case of via node participates in cooperation transmission, the capacity usage ratio of via node is calculated
Step：
The capacity usage ratio of via node is in the case of via node participation cooperation transmissionBy excellent
Change PselfOptimize capacity usage ratio η with α value, optimal conditions are expressed as：Meet Rself≥δ、Rc≥Rnc-sd、Er≤Emax、0
<α<Solved under conditions of 1Wherein, RcSource node data is come from for repeated link transmission
Message transmission rate, Rnc-sdFor source node to the transmission rate of destination node link transmission data, RselfSent out for via node
Send the transmission rate of its data, PselfThe transmitting work(for participating in providing for its data in the case of cooperation transmission for via node
Rate, α is the bandwidth ratio that source node distributes to via node, PmaxFor via node in the case of via node participation cooperation transmission
Maximum transmission power, δ be via node participate in cooperation transmission in the case of via node send its data minimum transmission speed
Rate value, ErFor the energy storage value of via node energy accumulator, EmaxFor the maximum energy storage value of via node energy accumulator,To obtain the corresponding P of maximum D values when changing C valueselfWith α computing, Popt-selfAnd αoptRespectively relay
Node is participated in the case of cooperation transmission, and the optimum transmission power and source node that via node provides for its data share to relaying
The optimum bandwidth ratio of node.
Another technical scheme that the present invention solves above-mentioned technical problem is as follows：Shared in a kind of EH collection of energy collaborative network
The cooperative transmission system of bandwidth, including：
Link establishment module, connects for setting up source node to via node and the via node to the link of destination node
Relation is connect, wherein, the via node can forward the data of the source node, and the via node number of itself can be also sent simultaneously
According to；
Trunk node selection module, is passed for judging whether the message transmission rate of the via node meets participation cooperation
Defeated rate requirement, and judge whether the energy of the via node is met while forwarding data and the transmission of the source node
Energy needed for the data of itself, if be satisfied by, selects the via node to carry out data forwarding.
Brief description of the drawings
The cooperation transmission method of bandwidth is shared in the EH collection of energy collaborative networks that Fig. 1 provides for one embodiment of the invention
Method flow diagram；
The cooperation transmission method of bandwidth is shared in the EH collection of energy collaborative networks that Fig. 2 provides for another embodiment of the present invention
Method flow diagram；
The cooperation transmission method of bandwidth is shared in the EH collection of energy collaborative networks that Fig. 3 provides for another embodiment of the present invention
Method flow diagram；
The cooperative transmission system of bandwidth is shared in the EH collection of energy collaborative networks that Fig. 4 provides for one embodiment of the invention
Module frame chart.
Embodiment
The principle and feature of the present invention are described below in conjunction with accompanying drawing, the given examples are served only to explain the present invention, and
It is non-to be used to limit the scope of the present invention.
In traditional cooperation communication system, when discussing fixed-bandwidth and power, source node and via node share bandwidth
When cooperation transmission, due to energy of the via node electric power from node themselves capture of wireless EH cooperative communication networks, therefore
It is not suitable for wireless EH cooperation communication systems.In wireless EH cooperation communication systems, resource allocation problem will not only consider channel
Characteristic, and to consider collection of energy characteristic, so as to increase the difficulty for solving problems.
The present invention proposes a kind of rational resource-sharing and optimizing distribution method in wireless EH collection of energy collaborative network,
Reach the double goal of optimization cooperation transmission and own data transmission.
The side of the cooperation transmission method of bandwidth is shared in the collection of energy collaborative network that Fig. 1 provides for one embodiment of the invention
Method flow chart；
As shown in figure 1, the cooperation transmission method of bandwidth is shared in a kind of EH collection of energy collaborative network, including following step
Suddenly：
Step 01：Source node is set up to via node and the via node to the link connection relation of destination node, its
In, the via node can forward the data of the source node, and via node data of itself can be also sent simultaneously；
Step 02：Judge whether the message transmission rate of the via node meets the rate requirement for participating in cooperation transmission；
Step 03：Judge that the energy of the via node is no to meet while forwarding the data of the source node and sending certainly
Energy needed for the data of body；
Step 04：If be satisfied by, the via node is selected to carry out data forwarding.
In above-described embodiment, it is proposed that in wireless EH cooperation communication systems, via node own data transmission speed is being ensured
On the premise of rate and energy, the bandwidth distributed by using source node realizes the new method of cooperation source node transmission, it is not necessary to
The new bandwidth resources of distribution, with scientific value and realistic meaning.
The cooperation transmission method of bandwidth is shared in the collection of energy collaborative network that Fig. 2 provides for another embodiment of the present invention
Method flow diagram；
On the basis of Fig. 1 embodiments, as shown in Fig. 2 judging whether the message transmission rate of the via node meets
Participating in the rate requirement of cooperation transmission includes：
Step 021：Calculate the message transmission rate that the source node directly transfers data to destination node；
Step 022：Calculate the data transfer speed that the via node participates in forwarding the source node data during cooperation transmission
Rate；
Step 023：If the via node participates in forwarding the data transfer speed of the source node data during cooperation transmission
Rate is more than or equal to the number that the source node directly transfers data to the message transmission rate, the then via node of destination node
The rate requirement for participating in cooperation transmission is met according to transmission rate.
In above-described embodiment, the requirement of message transmission rate and the requirement of energy need to be met simultaneously, it is ensured that via node
Stability when participating in cooperation transmission.
On the basis of Fig. 2 embodiments, the present embodiment is specifically introduced, and the calculating source node is directly transferred data to
The message transmission rate of destination node includes：
The message transmission rate that the source node directly transfers data to destination node is
Wherein, WsFor the bandwidth of source node, if the noise power spectral density of source node, via node and destination node is equal, N0For noise
Power spectral density, PsFor the transmission power of source node, gsdFor the channel gain of source node to destination node link.
In above-described embodiment, the requirement of cooperation can be participated in order to meet via node, source node need to be calculated and directly transmitted
Data to destination node message transmission rate, then with via node participate in cooperation transmission when forwarding source node data data pass
Defeated speed is compared to determine, it is ensured that via node assists stability and the optimization distribution of transmitting procedure.
The cooperation transmission method of bandwidth is shared in the collection of energy collaborative network that Fig. 3 provides for another embodiment of the present invention
Method flow diagram；
On the basis of Fig. 2 embodiments, as shown in figure 3, the calculating via node is participated in during cooperation transmission described in forwarding
The message transmission rate of source node data includes：
Step 0221：Principle is preferentially sent according to its data, via node is calculated and participates in relaying in the case of cooperation transmission
Node sends the message transmission rate of its data, and calculates via node ginseng according to the message transmission rate for sending its data
With the transmission power provided in the case of cooperation transmission for its data；
Step 0222：In the case of via node participates in cooperation transmission, by the maximum transmission power and relaying of via node
The difference for the transmission power that node provides for its data, obtains emission maximum work(of the via node forwarding from source node data
Rate；
Step 0223：Forward the maximum transmission power from source node data to calculate via node according to via node to participate in
The message transmission rate of the source node data is forwarded during cooperation transmission.
In above-described embodiment, in the case of via node participates in cooperation transmission, via node self transmission is calculated first
Message transmission rate and transmission power, then maximum transmission power of the via node forwarding from source node data is calculated, finally
The message transmission rate of source node data is forwarded when participating in cooperation transmission to via node, ensure that via node is being met certainly
The demand for assisting source node forwarding is met simultaneously under the demand of body transmission.
On the basis of Fig. 3 embodiments, the present embodiment is specifically introduced, and the calculating source node is directly transferred data to
The message transmission rate of destination node includes：
The message transmission rate that the source node directly transfers data to destination node is
Wherein, WsFor the bandwidth of source node, if the noise power spectral density of source node, via node and destination node is equal, N0For noise
Power spectral density, PsFor the transmission power of source node, gsdFor the channel gain of source node to destination node link.
On the basis of Fig. 3 embodiments, the present embodiment is specifically introduced, and the calculating via node participates in cooperation transmission situation
Lower via node sends the message transmission rate of its data, and calculates relaying according to the message transmission rate for sending its data
Node participates in for the transmission power that its data is provided including in the case of cooperation transmission：
Principle is preferentially sent according to its data, via node sends itself number in the case of via node participates in cooperation transmission
According to message transmission rate beWrFor the bandwidth of via node, PselfFor relaying section
Point participates in the transmission power provided in the case of cooperation transmission for its data, gselfParticipate in passing in the case of cooperation transmission for via node
The channel gain of defeated its data, if the noise power spectral density of source node, via node and destination node is equal, N0For noise work(
Rate spectrum density, and Via node sends its data most in the case of participating in cooperation transmission for via node
Low transmission power, according to formulaCalculating is obtained
WrFor the bandwidth of via node, δ is the minimum transmission speed that via node participates in via node transmission its data in the case of cooperation transmission
Rate value, according to formulaCalculating is obtained
On the basis of Fig. 3 embodiments, the present embodiment is specifically introduced, described to obtain via node forwarding from source node number
According to maximum transmission power include：
The maximum transmission power of via node is in the case of via node participation cooperation transmissionWherein, Er
For the energy storage value of via node energy accumulator, T is the transmission time of a time slot, and Er≤Emax, EmaxFor via node energy
The maximum energy storage value of memory is measured, then via node forwarding is from source node data in the case of via node participates in cooperation transmission
Maximum transmission power is Pf,max=Pmax-Pself, wherein, PselfIt is its data in the case of participating in cooperation transmission for via node
The transmission power of offer.
On the basis of Fig. 3 embodiments, the present embodiment is specifically introduced, described to come from source node number according to via node forwarding
According to maximum transmission power calculate when via node participates in cooperation transmission and forward the message transmission rate bag of the source node data
Include：
Maximum transmission power of the via node forwarding from source node data is in the case of via node participates in cooperation transmission
Pf,max=Pmax-Pself, wherein, PmaxThe maximum transmission power of via node in the case of cooperation transmission is participated in for via node,
PselfThe transmission power for participating in providing for its data in the case of cooperation transmission for via node；
Work as Pf,maxWhen≤0, to PselfValue be adjusted, whenWhen, now Pf,maxStill less than or be equal to
0, then via node be not involved in cooperation transmission；
Work as PselfValue adjust to causing Pf,max>When 0, source node is saved to relaying in the case of via node participates in cooperation transmission
The message transmission rate of point linkPsFor the transmitting work(of source node
Rate, gsrFor the channel gain of source node to via node link, α is the bandwidth ratio that source node distributes to via node, and α is real
Number and 0<α<1；
Via node participates in forwarding data rate of the via node forwarding from source node data in the case of cooperation transmission
Message transmission rate of the repeated link transmission from source node data is Rc=min (Rsr,Rrd), min (A, B) is represented
Less value is selected in A and B.
On the basis of Fig. 1 embodiments, the present embodiment is specifically introduced, and judges whether the energy of the via node meets together
When forward the data of the source node and send the energy needed for the data of itself, specific method is：
Calculate the via node and participate in the transmission rate R that via node during cooperation transmission sends its dataself(calculate
Introduction has been provided in method above-described embodiment), and via node forward source joint number evidence data rate Rc(computational methods are above-mentioned
Introduction has been provided in embodiment), if the maximum workable general power of via nodeDisclosure satisfy that makes Rself≥
δ, and Rc≥Rnc-sdRequired general power, then the via node energy meet simultaneously forward the source node data and
The energy needed for the data of itself is sent, wherein, PmaxThe maximum hair of via node in the case of cooperation transmission is participated in for via node
Penetrate power, ErFor the energy storage value of via node energy accumulator, T is the transmission time of a time slot, and δ is that via node participates in association
Via node sends the minimum transmission rate value of its data, R in the case of transmittingnc-sdCooperation transmission is not involved in for via node
When, data rate of the source node to destination node link transmission data.
In above-described embodiment, when the energy that via node is collected also meets condition, then the via node is selected to enter line number
According to forwarding, it is ensured that the stability of transmission and optimization distribution.
On the basis of above-described embodiment, the present embodiment introduction, in addition in the case of via node participates in cooperation transmission,
The step of calculating the capacity usage ratio of via node：
The capacity usage ratio of via node is in the case of via node participation cooperation transmissionBy excellent
Change PselfOptimize capacity usage ratio η with α value, optimal conditions are expressed as：Meet Rself≥δ、Rc≥Rnc-sd、Er≤Emax、0
<α<Solved under conditions of 1Wherein, RcSource node data is come from for repeated link transmission
Message transmission rate, Rnc-sdFor source node to the transmission rate of destination node link transmission data, RselfSent out for via node
Send the transmission rate of its data, PselfThe transmitting work(for participating in providing for its data in the case of cooperation transmission for via node
Rate, α is the bandwidth ratio that source node distributes to via node, PmaxFor via node in the case of via node participation cooperation transmission
Maximum transmission power, δ be via node participate in cooperation transmission in the case of via node send its data minimum transmission speed
Rate value, ErFor the energy storage value of via node energy accumulator, EmaxFor the maximum energy storage value of via node energy accumulator,To obtain the corresponding P of maximum D values when changing C valueselfWith α computing, Popt-selfAnd αoptRespectively relay
Node is participated in the case of cooperation transmission, and the optimum transmission power and source node that via node provides for its data share to relaying
The optimum bandwidth ratio of node.
The cooperative transmission system of bandwidth is shared in the EH collection of energy collaborative networks that Fig. 4 provides for one embodiment of the invention
Module frame chart；
As shown in figure 4, the cooperative transmission system of bandwidth is shared in a kind of EH collection of energy collaborative network, including：
Link establishment module, connects for setting up source node to via node and the via node to the link of destination node
Relation is connect, wherein, the via node can forward the data of the source node, and the via node number of itself can be also sent simultaneously
According to；
Trunk node selection module, is passed for judging whether the message transmission rate of the via node meets participation cooperation
Defeated rate requirement, and judge whether the energy of the via node is met while forwarding data and the transmission of the source node
Energy needed for the data of itself, if be satisfied by, selects the via node to carry out data forwarding.
On the basis of Fig. 4 embodiments, the trunk node selection module includes the first computing unit, and described first calculates
Unit is used for：
Calculate the source node and directly transfer data to the message transmission rate of destination node, and calculate the via node
Participate in forwarding the message transmission rate of the source node data during cooperation transmission；If the via node participates in cooperation transmission
The message transmission rate of the source node data is forwarded directly to transfer data to destination node more than or equal to the source node
The rate requirement of message transmission rate, then the message transmission rate satisfaction participation cooperation transmission of the via node.
In above-described embodiment, the requirement of message transmission rate and the requirement of energy need to be met simultaneously, it is ensured that via node
Stability when participating in cooperation transmission.
On the basis of above-described embodiment, in first computing unit, calculate the via node and participate in cooperation transmission
When forward the message transmission rate of the source node data to include：
Principle is preferentially sent according to its data, via node in the case of via node participates in cooperation transmission is calculated and sends certainly
The message transmission rate of body data, and via node participation cooperation transmission is calculated according to the message transmission rate for sending its data
In the case of the transmission power that is provided for its data；
It is itself by the maximum transmission power and via node of via node in the case of via node participates in cooperation transmission
The difference for the transmission power that data are provided, obtains maximum transmission power of the via node forwarding from source node data；
Forward the maximum transmission power from source node data to calculate via node according to via node and participate in cooperation transmission
When forward the message transmission rate of the source node data.
In above-described embodiment, in the case of via node participates in cooperation transmission, via node self transmission is calculated first
Message transmission rate and transmission power, then maximum transmission power of the via node forwarding from source node data is calculated, finally
The message transmission rate of source node data is forwarded when participating in cooperation transmission to via node, ensure that via node is being met certainly
The demand for assisting source node forwarding is met simultaneously under the demand of body transmission.
On the basis of Fig. 4 embodiments, the trunk node selection module includes the second computing unit, and described second calculates
Unit is used for：
Calculate the via node and participate in the transmission rate R that via node during cooperation transmission sends its dataself, and
Via node forwards the data rate R of source joint number evidencecIf, the maximum workable general power of via nodeCan
Satisfaction makes Rself>=δ, and Rc≥Rnc-sdRequired general power, then the energy of the via node is met forwards the source to save simultaneously
The data of point and energy needed for the data of itself is sent, wherein, PmaxParticipate in relaying in the case of cooperation transmission for via node
The maximum transmission power of node, ErFor the energy storage value of via node energy accumulator, T is the transmission time of a time slot, during δ is
Via node sends the minimum transmission rate value of its data, R in the case of node participates in cooperation transmissionnc-sdFor via node not
When participating in cooperation transmission, data rate of the source node to destination node link transmission data.
Main advantages of the present invention are：(1) propose in wireless EH cooperation communication systems, ensureing via node itself number
On the premise of according to transmission rate, the bandwidth distributed by using source node realizes the new method of cooperation source node transmission, it is not necessary to
The new bandwidth resources of distribution, with scientific value and realistic meaning；(2) optimization source node, via node work(are further provided
The method of rate and bandwidth resource allocation, for lifting system performance, with positive effect.
The foregoing is only presently preferred embodiments of the present invention, be not intended to limit the invention, it is all the present invention spirit and
Within principle, any modification, equivalent substitution and improvements made etc. should be included in the scope of the protection.
Claims (10)
1. the cooperation transmission method of bandwidth is shared in a kind of EH collection of energy collaborative network, it is characterised in that comprise the following steps：
Source node is set up to via node and the via node to the link connection relation of destination node, wherein, the relaying
Node can forward the data of the source node, and via node data of itself can be also sent simultaneously；
Judge the via node message transmission rate whether meet participate in cooperation transmission rate requirement, and judge it is described in
Whether the energy after node meets the energy while needed for forwarding the data of the source node and sending the data of itself, if
It is satisfied by, then selects the via node to carry out data forwarding.
2. sharing the cooperation transmission method of bandwidth in EH collection of energy collaborative network according to claim 1, its feature exists
In, judge the via node message transmission rate whether meet participate in cooperation transmission rate requirement include：
Calculate the message transmission rate that the source node directly transfers data to destination node；
And calculate the message transmission rate that the via node participates in forwarding the source node data during cooperation transmission；
If the via node participates in forwarding the message transmission rate of the source node data to be more than or equal to during cooperation transmission
The source node directly transfers data to the message transmission rate of destination node, then the message transmission rate of the via node expires
Foot participates in the rate requirement of cooperation transmission.
3. sharing the cooperation transmission method of bandwidth in EH collection of energy collaborative network according to claim 2, its feature exists
In the calculating via node participates in forwarding the message transmission rate of the source node data to include during cooperation transmission：
Principle is preferentially sent according to its data, via node in the case of via node participates in cooperation transmission is calculated and sends itself number
According to message transmission rate, and according to send its data message transmission rate calculate via node participate in cooperation transmission situation
The transmission power provided for its data down；
And in the case of via node participates in cooperation transmission, counted by the maximum transmission power and via node of via node for itself
According to the difference of the transmission power of offer, maximum transmission power of the via node forwarding from source node data is obtained；
And when the maximum transmission power calculating via node participation cooperation transmission from source node data is forwarded according to via node
Forward the message transmission rate of the source node data.
4. sharing the cooperation transmission method of bandwidth in EH collection of energy collaborative network according to claim 3, its feature exists
In the message transmission rate that the calculating source node directly transfers data to destination node includes：
The message transmission rate that the source node directly transfers data to destination node is
Wherein, WsFor the bandwidth of source node, if the noise power spectral density of source node, via node and destination node is equal, N0For noise
Power spectral density, PsFor the transmission power of source node, gsdFor the channel gain of source node to destination node link.
5. sharing the cooperation transmission method of bandwidth in EH collection of energy collaborative network according to claim 4, its feature exists
In described to calculate the message transmission rate that via node participates in via node transmission its data in the case of cooperation transmission, and root
The hair that via node participates in providing for its data in the case of cooperation transmission is calculated according to the message transmission rate for sending its data
Penetrating power includes：
Principle is preferentially sent according to its data, via node sends its data in the case of via node participates in cooperation transmission
Message transmission rate isWrFor the bandwidth of via node, PselfFor via node
The transmission power provided in the case of cooperation transmission for its data, g are providedselfParticipate in passing in the case of cooperation transmission for via node
The channel gain of defeated its data, if the noise power spectral density of source node, via node and destination node is equal, N0For noise
Power spectral density, and Via node sends its data in the case of participating in cooperation transmission for via node
Minimum transimission power, according to formulaCalculating is obtainedWr
For the bandwidth of via node, δ is the minimum transmission speed that via node participates in via node transmission its data in the case of cooperation transmission
Rate value, according to formulaCalculating is obtained
6. sharing the cooperation transmission method of bandwidth in EH collection of energy collaborative network according to claim 4, its feature exists
In the maximum transmission power of the via node forwarding from source node data that obtain includes：
The maximum transmission power of via node is in the case of via node participation cooperation transmissionWherein, ErFor in
After the energy storage value of node energy memory, T is the transmission time of a time slot, and Er≤Emax, EmaxDeposited for via node energy
The maximum energy storage value of reservoir, then via node forwards the maximum from source node data in the case of via node participates in cooperation transmission
Transmission power is Pf,max=Pmax-Pself, wherein, PselfParticipate in providing for its data in the case of cooperation transmission for via node
Transmission power.
7. sharing the cooperation transmission method of bandwidth in EH collection of energy collaborative network according to claim 4, its feature exists
In when the maximum transmission power calculating via node according to via node forwarding from source node data participates in cooperation transmission
Forwarding the message transmission rate of the source node data includes：
Maximum transmission power of the via node forwarding from source node data is P in the case of via node participates in cooperation transmissionf,max
=Pmax-Pself, wherein, PmaxThe maximum transmission power of via node in the case of cooperation transmission, P are participated in for via nodeselfFor in
The transmission power for participating in providing for its data in the case of cooperation transmission after node；
Work as Pf,maxWhen≤0, to PselfValue be adjusted, whenWhen, now Pf,maxStill less than or equal to 0, then
Via node is not involved in cooperation transmission；
Work as PselfValue adjust to causing Pf,max>When 0, source node is to via node chain in the case of via node participates in cooperation transmission
The message transmission rate on roadPsFor the transmission power of source node,
gsrFor the channel gain of source node to via node link, α is the bandwidth ratio that source node distributes to via node, and α is real number
And 0<α<1；
Via node participates in forwarding data rate of the via node forwarding from source node data in the case of cooperation transmission
Message transmission rate of the repeated link transmission from source node data is Rc=min (Rsr,Rrd), min (A, B) represents A and B
The middle less value of selection.
8. sharing the cooperation transmission method of bandwidth in EH collection of energy collaborative network according to claim 1, its feature exists
In judging whether the energy of the via node is met while forwarding the data of the source node and sending the data institute of itself
The energy needed, specific method is：
Calculate the via node and participate in the transmission rate R that via node during cooperation transmission sends its dataself, and relaying
Message transmission rate R of the link transmission from source node datacIf, the maximum workable general power of via nodeDisclosure satisfy that makes Rself>=δ, and Rc≥Rnc-sdRequired general power, then the energy satisfaction of the via node is same
When forward the data of the source node and send the energy needed for the data of itself, wherein, PmaxParticipate in cooperating for via node
The maximum transmission power of via node, E in the case of transmissionrFor the energy storage value of via node energy accumulator, T is a time slot
Transmission time, δ is the minimum transmission rate value that via node participates in via node transmission its data in the case of cooperation transmission,
Rnc-sdWhen being not involved in cooperation transmission for via node, data rate of the source node to destination node link transmission data.
9. sharing the cooperation transmission method of bandwidth in EH collection of energy collaborative network according to claim 8, its feature exists
In, in addition in the case of via node participates in cooperation transmission, the step of calculating the capacity usage ratio of via node：
The capacity usage ratio of via node is in the case of via node participation cooperation transmissionPass through optimization
PselfOptimize capacity usage ratio η with α value, optimal conditions are expressed as：Meet Rself≥δ、Rc≥Rnc-sd、Er≤Emax、0<α
<Solved under conditions of 1Wherein, RcIt is that repeated link is transmitted from source node data
Message transmission rate, Rnc-sdFor source node to the transmission rate of destination node link transmission data, RselfSent for via node
The transmission rate of its data, PselfThe transmission power for participating in providing for its data in the case of cooperation transmission for via node, α
The bandwidth ratio of via node, P are distributed to for source nodemaxFor via node in the case of via node participation cooperation transmission most
Big transmission power, δ is the minimum transmission rate value that via node participates in via node transmission its data in the case of cooperation transmission,
ErFor the energy storage value of via node energy accumulator, EmaxFor the maximum energy storage value of via node energy accumulator,For
Obtain the corresponding P of maximum D values when changing C valueselfWith α computing, Popt-selfAnd αoptRespectively via node participates in association
In the case of transmitting, the optimum transmission power and source node that via node provides for its data share to the optimal of via node
Bandwidth ratio.
10. the cooperative transmission system of bandwidth is shared in a kind of EH collection of energy collaborative network, it is characterised in that including：
Link establishment module, is closed for setting up source node to via node and the via node to the link connection of destination node
System, wherein, the via node can forward the data of the source node, and via node data of itself can be also sent simultaneously；
Trunk node selection module, cooperation transmission is participated in for judging whether the message transmission rate of the via node meets
Rate requirement, and judge whether the energy of the via node is met while forwarding the data of the source node and sending itself
Data needed for energy, if be satisfied by, select the via node carry out data forwarding.
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