CN102395188B - Communication relay terminal and combined optimization method for relay selection and power distribution of communication relay terminal - Google Patents
Communication relay terminal and combined optimization method for relay selection and power distribution of communication relay terminal Download PDFInfo
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- CN102395188B CN102395188B CN201110354748.8A CN201110354748A CN102395188B CN 102395188 B CN102395188 B CN 102395188B CN 201110354748 A CN201110354748 A CN 201110354748A CN 102395188 B CN102395188 B CN 102395188B
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Abstract
The invention belongs to the technical field of communication, and particularly relates to a communication relay terminal and a combined optimization method for relay selection and power distribution of the communication relay terminal. The relay terminal comprises a channel evaluation device, a parameter setting device, a relay selector and a power distributor, wherein the parameter setting device is used for setting service quality parameters needed by a first node and a second node; the relay selector is used for selecting an optimal relay mode; and the power distributor is used for computing related optimization sending power values, and sending the optimization sending power values to the first node, the second and an optimal relay node respectively. The communication relay terminal builds a combined optimization method for relay selection of a bothway relay network adopting simulative network coding and power distribution, and can make the total power of the relay network to be the smallest on the premise of satisfying certain quality.
Description
Technical field
The invention belongs to communication technical field, be specifically related to a kind of communication repeating terminal, and for adopting the relay selection of bilateral relay network and the combined optimization method of power division of analog network coding, particularly a kind of communication repeating terminal and minimize the method for network gross power.
Background technology
Bi-directional relaying communication network utilizes the broadcast characteristic of wireless channel, and by means of the forwarding of relaying, can improve widely transmission rate, reduces the error rate, reduces complexity, expands the coverage area, and especially can improve the availability of frequency spectrum.So districts of relay wireless communication network has become the important topic of wireless communication field.Adopt the bilateral relay network of analog network coding, easily realize simply again owing to thering is host-host protocol, and there is good laser propagation effect, receive much attention.
For the performance of further raising system, multiple relayings have appeared in trunking traffic, thereby have correspondingly occurred various relay selection technology.In junction network, conventionally between two end nodes, there are multiple via nodes, select different relaying numbers can have influence on systematic function and implementation complexity.Owing to selecting the strategy of multiple via nodes will improve the requirement to synchronization accuracy between node and increase signaling consumption, so select single via node to become the comparatively scheme of compromise.
And, by power division effectively, can further improve the performance of system.In many cases, relayed communications network need to be at given service quality (quality of service, QoS) under, minimize network gross power, because this power allocation scheme has higher realistic meaning for reduce battery loss, prolong network lifetime etc. in these class networks such as ad hoc network, sensing network.
Therefore, relay selection and power division are combined and become new research topic, different relay selection and power division combined optimization strategy can improve systematic function to some extent.
Summary of the invention
The object of the invention is in order to solve such class problem, in the network of employing analog network coding that has multiple relayings, the service quality (QoS) required according to network, select single optimum relaying and transmitting node and the via node that participates in cooperation are carried out to optimal power allocation, minimize network gross power to realize.
The present invention solves above-mentioned technical problem by following technical proposals: a kind of communication repeating terminal is provided, and this terminal has been set up a kind of relay selection of bilateral relay network and combined optimization strategy of power division for adopting analog network coding, can make under the prerequisite that meets certain service quality, it is minimum that the gross power of junction network reaches.
Communication repeating terminal provided by the invention, comprises that a sender unit for transmitted signal and is for receiving the signal receiver of signal; Also comprise:
One channel estimator, for assessment of the instantaneous road of the channel between first node and via node and between Section Point and via node information;
One parameter setting device, for arranging the needed QoS parameter of first node and Section Point;
One repeating selector, for according to instantaneous channel information and the needed QoS parameter of described parameter setting device of described channel estimator assessment, selects an optimum via node;
One power divider, for according to described channel information, required QoS parameter and the described optimum via node of having selected, calculate the optimization transmission power value of the optimization transmission power value of described first node, described Section Point and the optimization transmission power value of described optimum via node, and described optimization transmission power value is sent to respectively to described first node, Section Point and described optimum via node.
The QoS parameter of the instantaneous channel information preferably, evaluating according to described channel estimator and the set first node of described parameter setting device and Section Point
with
, select an optimal communication via node, its selection criterion is:
，
Wherein
with
be respectively
individual relaying and first node, with
instantaneous channel information between individual relaying and Section Point; And according to convention, QoS parameter
with
for the received signal to noise ratio of first node and Section Point.
Preferably, the QoS parameter required according to described channel information, first node and Section Point
with
and the described optimum via node of having selected, network node is carried out to power division, calculate the optimization transmission power value of the optimization transmission power value of the optimization transmission power value of described first node, described Section Point, described optimum via node and the optimization transmission power value of whole network, be followed successively by:
，
，
，
；
Preferably, described communication repeating terminal adopts analog network coding.
Preferably, described having chosen continued and first node, chosen continue and Section Point between instantaneous channel information be rayleigh distributed.
The combined optimization method of relay selection and power division for bilateral relay network that the present invention proposes, concrete steps are:
Step S01, described channel estimator is assessed the channel information between described transmitting node and receiving node and via node according to signal receiver, then enters step S02;
Step S02, described parameter setting device arranges needed QoS parameter, then enters step S03;
Step S03, according to instantaneous channel information and the needed QoS parameter of described parameter setting device of described channel estimator assessment, selects an optimum via node, then enters step S04;
Step S04, for according to described channel information, required QoS parameter and the described optimum via node of having selected, calculate the optimization transmission power value of the optimization transmission power value of the optimization transmission power value of described first node, described Section Point, described optimum via node and the optimization transmission power value of whole network, and described optimization transmission power value is sent to respectively to described first node, Section Point and described optimum via node.
Preferably, in described step S03 according to described channel information and required QoS parameter
, select an optimal communication via node, its selection criterion is:
，
Wherein
with
be respectively
individual relaying and first node, the
instantaneous channel information between individual relaying and Section Point; And according to convention, QoS parameter
with
for the received signal to noise ratio of first node and Section Point.
Preferably, in described step S04, the QoS parameter required according to described channel information, first node and Section Point
with
and the described optimum via node of having selected, network node is carried out to power division, calculate the optimization transmission power value of the optimization transmission power value of the optimization transmission power value of described first node, described Section Point, described optimum via node and the optimization transmission power value of whole network, be respectively:
，
，
，
。
Positive progressive effect of the present invention is: described communication repeating terminal adopts the combined optimization strategy of relay selection and power division, combine the advantage of these two kinds of technology of relay selection and power division, make network performance in the case of meeting certain quality of service requirement, it is minimum that the power of whole network can reach, and has stronger realistic meaning for ad hoc constant power or energy constraint network.
Brief description of the drawings
Fig. 1 is the module diagram of the communication repeating terminal of preferred embodiment of the present invention.
Fig. 2 is the relay selection of communication repeating terminal and the logical flow chart of power division combined optimization strategy of preferred embodiment of the present invention.
Embodiment
Provide preferred embodiment of the present invention below in conjunction with accompanying drawing, to describe technical scheme of the present invention in detail.In Figure of description, the element with similar structures or function will represent with identical component symbol.Just each embodiment of the present invention for convenience of explanation of accompanying drawing, is not to carry out to the present invention the explanation of exhaustive, neither limit scope of the present invention.
As illustrated in fig. 1 and 2, a kind of communication repeating terminal 100, comprise that a sender unit (not shown in FIG.) for first node 210 and Section Point 220 transmitted signals and is for receiving the signal receiver (not shown in FIG.) of signal, also comprise a channel estimator 110, for assessment of the channel information between first node 210 and all via nodes and between Section Point 220 and all via nodes; One parameter setting device 120, for arranging needed QoS parameter; One repeating selector 130, for instantaneous channel information and the needed QoS parameter of described parameter setting device 120 assessed according to described channel estimator 110, selects an optimum via node; One power divider 140, be used for according to the operation result of described channel estimator 110, parameter setting device 120 and repeating selector 130, calculate the optimization transmission power value of described first node, Section Point and the optimization transmission power value of described optimum via node, and described optimization transmission power value is sent to respectively to the selected optimum via node of described first node 210, Section Point 220 and described repeating selector 130.
In a preferred embodiment, the instantaneous channel information that described channel estimator 110 is assessed and the needed QoS parameter of described parameter setting device 120
with
, described repeating selector 130 is selected an optimal communication via node, and its selection criterion is:
，
Wherein
with
be respectively
individual relaying and first node and
instantaneous channel information between individual relaying and Section Point; And according to convention, QoS parameter
with
for the received signal to noise ratio of first node and Section Point.
In a preferred embodiment, according to the operation result of described channel estimator 110, parameter setting device 120 and repeating selector 130, the optimization transmission power value of the optimization transmission power value of the described first node of power divider 140 gained, the optimization transmission power value of Section Point and described optimum via node and the total optimization transmission power value of described communication network, be respectively:
，
，
，
；
In a preferred embodiment, described communication repeating terminal adopts analog network coding.
Although more than described the specific embodiment of the present invention, it will be understood by those of skill in the art that these only illustrate, protection scope of the present invention is limited by appended claims.Those skilled in the art is not deviating under the prerequisite of principle of the present invention and essence, can make various changes or modifications to these execution modes, but these changes and amendment all fall into protection scope of the present invention.
Claims (5)
1. a communication repeating terminal, comprises that a sender unit for transmitted signal and is for receiving the signal receiver of signal, and described terminal also comprises:
One channel estimator, for assessment of the instantaneous channel information between first node and via node and between Section Point and via node;
One parameter setting device, for arranging the needed QoS parameter of first node and Section Point;
One repeating selector, for according to instantaneous channel information and the needed QoS parameter of described parameter setting device of described channel estimator assessment, selects an optimum via node;
One power divider, for according to described channel information, required QoS parameter and the described optimum via node of having selected, calculate the optimization transmission power value of the optimization transmission power value of described first node, described Section Point and the optimization transmission power value of described optimum via node, and described optimization transmission power value is sent to respectively to described first node, Section Point and described optimum via node;
It is characterized in that the QoS parameter of the instantaneous channel information evaluating according to described channel estimator and the set first node of described parameter setting device and Section Point
with
, select an optimal communication via node, its selection criterion is:
，
Wherein
with
be respectively
individual relaying and first node and
instantaneous channel information between individual relaying and Section Point; QoS parameter
with
for the received signal to noise ratio of first node and Section Point.
2. communication repeating terminal as claimed in claim 1, is characterized in that, the QoS parameter required according to described channel information, first node and Section Point
with
and the described optimum via node of having selected, network node is carried out to power division, calculate the optimization transmission power value of the optimization transmission power value of the optimization transmission power value of described first node, described Section Point, described optimum via node and the optimization transmission power value of whole network, be followed successively by:
，
，
，
。
3. communication repeating terminal as claimed in claim 1 or 2, is characterized in that, described communication repeating terminal adopts analog network coding.
4. communication repeating terminal as claimed in claim 1 or 2, is characterized in that, described chosen continue and first node and having chosen continues and Section Point between instantaneous channel information be rayleigh distributed.
5. the communication terminal as described in one of claim 1-4 adopts relay selection and power division combined optimization method, it is characterized in that, concrete steps comprise:
Step S01, described channel estimator is according to the channel information between signal receiver assessment transmitting node and receiving node and via node;
Step S02, described parameter setting device arranges needed QoS parameter;
Step S03, for according to instantaneous channel information and the needed QoS parameter of described parameter setting device of described channel estimator assessment, selects an optimum via node, then enters step S04;
Step S04, for according to described channel information, required QoS parameter and the described optimum via node of having selected, calculate the optimization transmission power value of the optimization transmission power value of the optimization transmission power value of described first node, described Section Point, described optimum via node and the optimization transmission power value of whole network, and the optimization transmission power value of described first node, Section Point and optimum via node is sent to respectively to corresponding first node, Section Point and optimum via node.
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| CN103117835B (en) * | 2012-11-29 | 2015-06-03 | 浙江大学 | Joint adaptive modulation and coding and power distribution method of bidirectional relay system |
| CN103916949B (en) * | 2013-01-04 | 2017-05-24 | 北京邮电大学 | Power distribution method and device for two-way relay transmission in wireless cognitive network |
| CN104202788A (en) * | 2014-07-22 | 2014-12-10 | 浙江工业大学 | Relay node selection method for minimizing end-to-end sending power in Rayleigh fading channel |
| CN104967472B (en) * | 2015-05-08 | 2018-08-03 | 上海交通大学 | The optimal power allocation and relaying dispositions method of the two-way decoding forward relay of full duplex |
| CN105246140B (en) * | 2015-10-08 | 2019-05-07 | 北京邮电大学 | A kind of control method and device of the trunking gain of bi-directional full-duplex amplification forwarding |
| CN105764130B (en) * | 2016-03-04 | 2018-12-21 | 山东大学 | The power distribution method of full duplex relaying network under imperfect channel state |
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| CN101977391B (en) * | 2010-10-15 | 2013-04-24 | 北京邮电大学 | Multiple terminal cooperative communication method in cognition wireless network |
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