CN103179655A - Distributed node power control method in mobile ad hoc network - Google Patents
Distributed node power control method in mobile ad hoc network Download PDFInfo
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- CN103179655A CN103179655A CN2013101189478A CN201310118947A CN103179655A CN 103179655 A CN103179655 A CN 103179655A CN 2013101189478 A CN2013101189478 A CN 2013101189478A CN 201310118947 A CN201310118947 A CN 201310118947A CN 103179655 A CN103179655 A CN 103179655A
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Abstract
The invention discloses a distributed node power control method in a mobile ad hoc network. The distributed node power control method comprises the following steps that: (1) a new node is successfully added in the mobile ad hoc network and calculates an initial communication radius per se; (2) the new node calculates and sets an emitting power per se, wherein the emitting power P=(Eelec+epsilon amp*d<2>)*B; (3) the new node sends a broadcast message; (4) other nodes in the mobile ad hoc network receive the broadcast message of the new node, and send a return message to the new node, wherein the return message comprises the content that whether a Flag 3 of the emitting power of the new added node is regulated or not; and (5) the new node receives the return message, if the Flag 3 is not equal to 1, the communication radius in the step (1) is finely tuned to be d-delta d, the steps (2), (3), (4) and (5) are executed again in sequence, and if the Flag 3 is equal to 1, the powers of the nodes in the mobile ad hoc network can be tuned. According to the distributed node power control method, the powers of the nodes can be rapidly converged to final values, the power control efficiency is ensured, the communication of a network is also guaranteed, and the life cycle of the network is prolonged.
Description
Technical field
The present invention relates to a kind of distributed node Poewr control method, be specifically related in a kind of mobile ad-hoc network based on the distributed node Poewr control method of arest neighbors probability, belong to network communications technology field.
Background technology
Mobile ad-hoc network is to be consisted of, automatically safeguarded and multi-hop routing forwarding mechanism by automatic discovery, network topology by one group of mobile node (terminal), realizes the network technology that interconnects between node.The battery electric quantity of these mobile nodes self is limited, for extending the operating time (life cycle) of node, often needs its through-put power of reduce to reduce the consumption of energy.Yet the signal transmission distance of node depends on the size of its through-put power, and limited transmission range makes the route of mobile ad-hoc network to realize by the data retransmission of a plurality of intermediate nodes.Between node, too short transmission range makes transfer of data by more intermediate node relay messages, might cause more energy consumption; Long transmission range can increase the possibility of interference, and each mobile node in mobile ad-hoc network need to use shared channel resources with competing, and the wireless signal of node will produce other nodes and disturb, and therefore reasonably transmission range is very important.On the other hand, the transmission range of node depends on the power of node, can lead to overpowering control and adjust transmission range.Therefore, determine a suitable node power, can energy balance, the factors such as connectedness of interference and topology.
The power of several mobile ad-hoc networks that exist is at present controlled and is mainly reflected in following scheme: 1) based on minimum transfer energy consumption routing policy, this is more typical one is LAR (Location Aided Routing) strategy, it is a GPS auxiliary type distributed energy routing policy, reduces based on prediction node current location algorithm the interstitial content that is affected in the transmission energy consumption between adjacent node, the efficient that improves route requests, constraint route request process.But there are some shortcomings in this method, and it makes some key nodes fall into continually on minimum delivering power path, and these nodes exhaust energy prematurely will be easy to produce avalanche effect, thereby shortens the life span of network.2) the low-yield node-routing strategy of protection; the DSR-ERP strategy that proposes on the basis of DSR (Dynamic Source Routing) comprises two energy routing strategy: RDRP (Request-Delay Routing Protocol) and MMRP (Max-Min Routing Protocol).Two kinds of strategies are all by the control to route requests broadcasting in DSR, reach the purpose of protection low energy level node, but all have the larger problem of time-delay.3) combined power is controlled, Poewr control method as centralized wireless multihop access network, according to node traffic rate calculations Initial Trans, then adopt the distributed iterative power control algorithm to calculate each frame transmitting power, after every frame end of transmission to frame in transmitting power add up and calculate under the frame Initial Trans, then the transmitting power in this superframe is added up, calculate the Initial Trans of next superframe, repeat above step until be transmitted.
Said method is balanced to a certain extent internodal energy consumption balance still, is not all considered communication distance to the decisive influence of power, thus cause the power adjustment very slow converge to end value, greatly affected the efficient that power is adjusted.
Summary of the invention
Goal of the invention: the object of the invention is to for the deficiencies in the prior art, distributed node Poewr control method in a kind of mobile ad-hoc network is provided, make the power of node can converge to fast end value, guaranteed the efficient that power is controlled, guarantee simultaneously the connectedness of network, extend the life cycle of network and improve network communication quality.
Technical scheme: distributed node Poewr control method in mobile ad-hoc network of the present invention, carry out as follows:
(1) new node successfully adds mobile ad-hoc network, calculates the initial communication radius of self according to the area size in the current network of obtaining and node number:
Wherein, a and b are respectively the length of mobile ad-hoc network rectangular area and wide, P
rBe given probability, the node number of n for existing in current mobile ad-hoc network except new node; Node number in current mobile ad-hoc network and area size are obtained from the management node by checking;
(2) new node calculates and arranges the transmitting power of self, transmitting power
P=(E
Elec+ ε
amp* d
2) * B, wherein, E
ElecThe consumption of expression radio, ε
ampBe a coefficient, d is the initial communication radius that obtains in step (1), and B is the signal bandwidth of node;
(3) new node is broadcasted with the transmitting power P that obtains in step (2), and whether the definition transmitting power needs the flag F lag that adjusts in the data field of new node
1, its initial value is 0, is made as 1 and no longer changes after receiving returned packet.Simultaneously, carry transmitting power P and whether need to adjust the flag F lag of nodes transmitting power in the broadcasting packet of new node
2, Flag
2Initial value be 0, be made as 1 when power P converges to end value;
(4) after other nodes in mobile ad-hoc network receive the broadcasting packet of new node, send returned packet to new node, returned packet comprises the flag F lag of the transmitting power of whether adjusting newly added node
3, the returning and flag F lag of message
3Obtaining value method be if Flag
2=1, make Flag
3=1, otherwise Flag
3=0, its transmitting power of node that receives simultaneously message also should change as shown below:
If P
Local〉=P, present node is with the transmitting power P of self
LocalSend returned packet;
If P
Local＜P and Flag
3≠ 1, present node sends returned packet with the backward new node of transmitting power P that transmitting power is adjusted into new node temporarily, then the transmitting power adjustment is returned the transmitting power P of self
Local
If P
Local＜P and Flag
3=1, present node sends returned packet with the backward new node of transmitting power P that transmitting power is adjusted into new node;
(5) new node receives returned packet, makes Flag
1=1; If Flag
3≠ 1, the communication radius in trim step (1) is d-Δ d, again order execution in step (2), (3), (4) and (5); If Flag
3=1, complete the power fine setting of node in mobile ad-hoc network.
After in being further defined to of technical solution of the present invention, step (3), new node is broadcasted, if after a period of time, do not receive any returned packet, and Flag
1=1, the communication radius d+ Δ d of fine setting new node recomputates the transmitting power P of new node, and is that P no longer changes with the transmission power setting of new node, with seasonal Flag
2=1, order execution in step (3), (4) and (5) again.
Further, after in step (3), new node is broadcasted, if after a period of time, do not receive any returned packet, and Flag
1=0, the communication radius d+ Δ d of fine setting new node recomputates the transmitting power P of new node, again order execution in step (3), (4) and (5).
Beneficial effect: distributed node Poewr control method in mobile ad-hoc network of the present invention, Initial Trans according to the probability distribution computing node of node in mobile ad-hoc network makes the power adjustment of node can converge to fast end value; Utilize the internodal initial communication distance of probability calculation, make this Poewr control method need not be confined to internodal distance in certain topology or certain scene, avoided the particularity of node location; Use simultaneously the method can avoid the generation of avalanche effect, solved in power control and postponed larger problem, compare simple efficient with the Poewr control method of centralized wireless multihop access network, improve life cycle and the communication quality of network, guaranteed the connectedness of network, extend network lifetime, reduce internodal interference to increase network throughput.
Description of drawings
Fig. 1 is the mobile ad-hoc network schematic diagram of the described rectangle topology of embodiment;
Fig. 2 is the structure chart of the broadcasting packet of the described new node of embodiment;
Fig. 3 is the Poewr control method flow chart of the described new node of embodiment;
Fig. 4 is the flow chart of the Poewr control method of other nodes in the described mobile ad-hoc network of embodiment;
Fig. 5 is the node abstraction overall situation figure of the described mobile ad-hoc network of embodiment.
Embodiment
The below is elaborated to technical solution of the present invention, but protection scope of the present invention is not limited to described embodiment.
Embodiment: the invention provides distributed node Poewr control method in a kind of mobile ad-hoc network, carry out as follows:
(1) new node successfully adds mobile ad-hoc network, calculates the initial communication radius of self according to the area size in the current network of obtaining and node number:
Wherein, a and b are respectively the length of mobile ad-hoc network rectangular area and wide, P
rBe given probability.
The mobile ad-hoc network schematic diagram of rectangle topology as shown in Figure 1, the node that has added network is n, when a new node added mobile ad-hoc network, this node can send to the management node in current network application and adding this mobile ad-hoc network after by checking.At this moment, this node can obtain the relevant information in current mobile ad-hoc network zone from management node, comprise node number and area size in current mobile ad-hoc network.
The derivation method of the initial communication radius of new node self is: length is respectively in the rectangle mobile ad-hoc network zone of a and b and has had n node, when n+1 node enters this zone, has the probability P of other nodes in its communication radius d
rSuc as formula:
There is this formula can get the initial communication radius of new node self.
(2) new node calculates and arranges the transmitting power of self, transmitting power
P=(E
Elec+ ε
amp* d
2) * B, wherein, E
ElecThe consumption of expression radio, ε
ampBe a coefficient, d is the initial communication radius that obtains in step (1), and B is the signal bandwidth of node.
Embodiment: be 20m for an initial communication distance, transmission rate is the newly added node of 10Mbps, its Initial Trans should be set be
P＝(50*10
-9+100*10
-12*20
2)*(10*1024
2)＝0.9W。
The derivation method of transmitting power computing formula is:
New node calculates and arranges the transmitting power of oneself according to the transmitting power computing formula, its computing formula is suc as formula being: E
Tx(k, d)=E
Elec* k+ ε
amp* k*d
2, the expression node be the needed emitted energy of packet of a kbit of transmission under the condition of d in distance.E wherein
Elec* the k indication circuit drives the energy of required consumption, E
ElecThe consumption of expression radio, general value is 50nJ/bit.ε
amp* k*d
2Expression transmits the needed energy of d distance, ε with the packet of kbit
ampBe a coefficient, its value is generally 100pJ/bit/m
2
The signal bandwidth of node is B, and the needed time of packet that sends kbit is T, T=k/B wherein, and the transmitting power P of node is as follows: P=E
Tx(k, d)/T, i.e. P=(E
Elec+ ε
amp* d
2) * B.
(3) new node is broadcasted with the transmitting power P that obtains in step (2), and whether the definition transmitting power needs the flag F lag that adjusts in the data field of new node
1=0, simultaneously, the structure chart of broadcasting packet carries transmitting power P and whether needs to adjust the flag F lag of nodes transmitting power as shown in Figure 2 in the broadcasting packet of new node
2=0.
(4) after other nodes in mobile ad-hoc network receive the broadcasting packet of new node, send returned packet to new node, returned packet comprises the flag F lag of the transmitting power of whether adjusting newly added node
3, the returning and flag F lag of message
3Obtaining value method be if Flag
2=1, make Flag
3=1, otherwise Flag
3=0, its transmitting power of node that receives simultaneously message also should change as shown below:
If P
Local〉=P, present node is with the transmitting power P of self
LocalSend returned packet;
If P
Local＜P and Flag
3≠ 1, present node sends returned packet with the backward new node of transmitting power P that transmitting power is adjusted into new node temporarily, then the transmitting power adjustment is returned the transmitting power P of self
Local
If P
Local＜P and Flag
3=1, present node sends returned packet with the backward new node of transmitting power P that transmitting power is adjusted into new node;
(5) the Poewr control method flow chart of new node as shown in Figure 3, new node receives returned packet, makes Flag
1=1; If Flag
3≠ 1, the communication radius in trim step (1) is d-Δ d, again order execution in step (2), (3), (4) and (5); If Flag
3=1, complete the power fine setting of node in mobile ad-hoc network.
(6) after new node is broadcasted, if after a period of time, do not receive any returned packet, and Flag
1=1, the communication radius d+ Δ d of fine setting new node recomputates the transmitting power P of new node, and is that P no longer changes with the transmission power setting of new node, with seasonal Flag
2=1, order execution in step (3), (4) and (5) again.
(7) after new node is broadcasted, if after a period of time, do not receive any returned packet, and Flag
1=0, the communication radius d+ Δ d of fine setting new node recomputates the transmitting power P of new node, again order execution in step (3), (4) and (5).
Below, do further detailed description according to above-mentioned control method in conjunction with concrete application scenarios.
As shown in Figure 5, be the node abstraction overall situation figure of mobile ad-hoc network, one long be 200m, wide is to be distributed with ABC3 node in the rectangular area of 100m, these 3 nodes have formed a mobile ad-hoc network and have been communicated with, and use this Poewr control method.An existing new network node D will add this mobile ad-hoc network (transmission rate of ABCD is 10Mbps), and its power set-up procedure is as follows:
(1) node D sends application and add this mobile ad-hoc network after verifying to the management node in mobile ad-hoc network, node from this mobile ad-hoc network obtains size (a=200m, b=100m) and the node number n=3 of current region simultaneously.
(2) calculate the initial communication distance d of the node that newly adds mobile ad-hoc network.Given P
r=0.6, according to formula
Calculate d=40.93
(3) utilize the Initial Trans of the initial communication distance d computing node of newly added node
P＝(50*10
-9+100*10
-12*40.93
2)*(10*1024
2)＝1.86W
(4) node D broadcasts with power 1.86W, and broadcasting packet such as Fig. 2 self are arranging a flag F lag simultaneously
1=0.Node in mobile ad-hoc network (ABC) carries out the power adjustment according to flow chart 3, and node D carries out the power adjustment according to flow chart 4 simultaneously, obtains at last final transmitting power, completes the power adjustment of node.
Distributed node Poewr control method in the mobile ad-hoc network that the present invention proposes, at first utilizing current square net zone and regional interior nodes number to calculate newly added node can be with the initial communication distance of certain probability and other node communications, then according to initial communication distance, its Initial Trans value of Node configuration, with this Initial Trans other node initiating communications in the mobile ad-hoc network, again power is finely tuned according to different feedbacks, finally reach the connection of whole network, complete whole network power and control.
As mentioned above, although represented and explained the present invention with reference to specific preferred embodiment, it shall not be construed as the restriction to the present invention self.Under the spirit and scope of the present invention prerequisite that does not break away from the claims definition, can make in the form and details various variations to it.
Claims (3)
1. distributed node Poewr control method in mobile ad-hoc network, is characterized in that, carries out as follows:
(1) new node successfully adds mobile ad-hoc network, calculates the initial communication radius of self according to the area size in the current network of obtaining and node number:
Wherein, a and b are respectively the length of mobile ad-hoc network rectangular area and wide, P
rBe given probability, the node number of n for existing in current mobile ad-hoc network except new node;
(2) new node calculates and arranges the transmitting power of self, transmitting power P=(E
Elec+ ε
amp* d
2) * B, wherein, E
ElecThe consumption of expression radio, ε
ampBe a coefficient, d is the initial communication radius that obtains in step (1), and B is the signal bandwidth of node;
(3) new node is broadcasted with the transmitting power P that obtains in step (2), and whether the definition transmitting power needs the flag F lag that adjusts in the data field of new node
1, its initial value is 0, is made as 1 and no longer changes after receiving returned packet.Simultaneously, carry transmitting power P and whether need to adjust the flag F lag of nodes transmitting power in the broadcasting packet of new node
2, Flag
2Initial value be 0, be made as 1 when power P converges to end value;
(4) after other nodes in mobile ad-hoc network receive the broadcasting packet of new node, send returned packet to new node, returned packet comprises the flag F lag of the transmitting power of whether adjusting newly added node
3, the returning and flag F lag of message
3Obtaining value method be if Flag
2=1, make Flag
3=1, otherwise Flag
3=0, its transmitting power of node that receives simultaneously message also should change as shown below:
If P
Local〉=P, present node is with the transmitting power P of self
LocalSend returned packet;
If P
Local＜P and Flag
3≠ 1, present node sends returned packet with the backward new node of transmitting power P that transmitting power is adjusted into new node temporarily, then the transmitting power adjustment is returned the transmitting power P of self
Local
If P
Local＜P and Flag
3=1, present node sends returned packet with the backward new node of transmitting power P that transmitting power is adjusted into new node;
(5) new node receives returned packet, makes Flag
1=1; If Flag
3≠ 1, the communication radius in trim step (1) is d-Δ d, again order execution in step (2), (3), (4) and (5); If Flag
3=1, complete the power fine setting of node in mobile ad-hoc network.
2. distributed node Poewr control method in mobile ad-hoc network according to claim 1, is characterized in that, after in step (3), new node is broadcasted, if after a period of time, do not receive any returned packet, and Flag
1=1, the communication radius d+ Δ d of fine setting new node recomputates the transmitting power P of new node, and is that P no longer changes with the transmission power setting of new node, with seasonal Flag
2=1, order execution in step (3), (4) and (5) again.
3. distributed node Poewr control method in mobile ad-hoc network according to claim 1, is characterized in that, after in step (3), new node is broadcasted, if after a period of time, do not receive any returned packet, and Flag
1=0, the communication radius d+ Δ d of fine setting new node recomputates the transmitting power P of new node, again order execution in step (3), (4) and (5).
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Cited By (4)
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| CN103686610A (en) * | 2013-11-30 | 2014-03-26 | 北京智谷睿拓技术服务有限公司 | Broadcast method and broadcast equipment for wireless communication |
| WO2015078277A1 (en) * | 2013-11-30 | 2015-06-04 | Beijing Zhigu Rui Tuo Tech Co., Ltd | Broadcasting, and scanning for wireless communication |
| CN104735765A (en) * | 2015-03-06 | 2015-06-24 | 上海无线通信研究中心 | Roadside unit power control method based on connection probability and roadside unit |
| CN108616893A (en) * | 2018-03-21 | 2018-10-02 | 西安电子科技大学 | A kind of topology control method of high energy efficiency |
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| WO2015078278A1 (en) * | 2013-11-30 | 2015-06-04 | Beijing Zhigu Rui Tuo Tech Co., Ltd | Broadcasting for wireless communications |
| WO2015078277A1 (en) * | 2013-11-30 | 2015-06-04 | Beijing Zhigu Rui Tuo Tech Co., Ltd | Broadcasting, and scanning for wireless communication |
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| CN104735765A (en) * | 2015-03-06 | 2015-06-24 | 上海无线通信研究中心 | Roadside unit power control method based on connection probability and roadside unit |
| CN108616893A (en) * | 2018-03-21 | 2018-10-02 | 西安电子科技大学 | A kind of topology control method of high energy efficiency |
| CN108616893B (en) * | 2018-03-21 | 2021-09-28 | 西安电子科技大学 | High-energy-efficiency topology control method |
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