CN102761950A - Self-adaption self-optimizing QoS (quality of service) transmission method for heterogeneous network - Google Patents

Abstract

The invention discloses a self-adaption self-optimizing QoS (quality of service) transmission method for the heterogeneous network. The self-adaption self-optimizing QoS transmission method includes firstly, setting two work modes of a node, a normal work mode and an emergency work mode, in a manner that switching between transmission power in the normal work mode and transmission power in the emergency work mode is decided according to the fact whether data value acquired exceeds the threshold value or not; secondly, selecting proper transmission power from the transmission powers in the normal work mode and the emergency work mode when the node enters the emergency work mode, and searching for mobile terminals nearby to be as mobile gateways; thirdly, setting service security delay, and marking mobile gateway response received in the service security delay to be available; and fourthly, with the node, calculating weight of the mobile terminal receiving available response and selecting the mobile gateway with the highest weight to be as a skip gateway to transmit emergency service data. The self-adaption self-optimizing QoS transmission method guarantees QoS of emergency services, network life circle is effectively prolonged, and the service life of the node is prolonged as well.

Description

A kind of heterogeneous network QoS self adaptation self-optimizing transmission method

Technical field

The invention belongs to heterogeneous network integration technology field, relate to a kind of heterogeneous network QoS self adaptation self-optimizing transmission method.

Background technology

In recent years, the communication technology has obtained fast development, and increasing wireless communication system provides various heterogeneous network environments for the user.Wireless sense network (like Zigbee), Wireless Personal Network (like Bluetooth), WLAN (like Wi-Fi), public mobile network (like 2G, 3G) wait communication network ripe day by day.Above-mentioned network provides ubiquitous for the user, information communication service at all times.And for better access service is provided to the user; Make network have more excellent topological structure and extensibility, realize self-organizing truly, self adaptation; And realizing having the service that end-to-end quality of service (QoS) guarantees, the fusion of heterogeneous network is inevitable.At present, how guaranteeing the QoS of different kinds of business, how to utilize network advantages each other the most efficiently during heterogeneous network merges, realize seamless access thereby access controlled, is the emphasis direction of present heterogeneous network integration technology research.

Multihop network (ad-hoc) is to use more a kind of network topology structure in the wireless sense network.Because transmission of power consumption and transmission path exponentially level relation, therefore transmitting packet through the mode of multi-hop can reduce total energy consumption in the ordinary course of things, thereby prolongs the life cycle of whole network.But weak point is to have increased the time-delay of data packet transmission through the multi-hop transmission, thereby is not suitable for the application of some real-time service transmission.

The research of handling to the high priority burst service during existing heterogeneous network merges is less; In traditional wireless sense network to the processing of high priority burst service then mainly depend at present MAC layer adjustment sleep mechanism and at the route layer simultaneously through the mulitpath transmission, and when congested preferential methods such as business of sending high priority.In single network, said method no doubt can effectively guarantee the QoS of high priority burst service, but to sacrifice energy consumption, increase complexity etc. is a cost.And in wireless sense network was used, operational capability that node is limited and limited energy were topmost problems.

Focus on the energy consumption of node when designing in traditional wireless sense network, sacrificial section time-delay in case of necessity and throughput.And to disaster monitoring; The application higher of vital signs this type of monitoring to qos requirement, like the heartbeat inspecting of hospital, unusual if patient's palmic rate takes place to patient; This accident needs to notify at once data center zero defect; If time-delay is bigger in transmission course, QoS can not get guaranteeing that then patient's life health will receive great threat.It is important problem very during heterogeneous network merges that the reply of accident is handled always.Reporting system data center in the necessary very first time after the generation that detects disaster, thus counter-measure timely and effectively made, reduce the loss of broad masses of the people's lives and properties.But in traditional wireless sense network monitoring of environmental process,, cut down the consumption of energy through sacrificing time-delay usually in order to prolong the life cycle of node.And in the agreement of existing several kinds of assurance low delays communication, node can be delayed time and the energization expense because reducing again.

For guaranteeing with less time-delay transmitting burst incident, prior art generally through following mechanism with reply:

First method: emergency if next-hop node is intercepted, is then preengage channel and is transmitted, otherwise carry out data fusion at this node after triggering.Node if listen to the RTS that mails to oneself, then is inserted in transmitting time among the CTS and sends when waking up, and then when jumping into the row transmission with next, cancels RTS/CTS and shakes hands if receive the response of next jumping, directly transmits data.Do the transmission delay that has reduced incident data to a certain extent like this.

Second method: emergency at first transfers to a bunch head by node after triggering, and bunch head, then starts mulitpath and passes the point to sink simultaneously if be judged as urgency traffic according to these data are carried out traffic differentiation, otherwise uses the individual paths transmission.

With above-mentioned two types different to the emergency particular case, RAP according to the speed of each packet of all traffic transmission delay requirements definition is:

$V=\frac{\left|\right|p\stackrel{\→}{\mathrm{src}}-p\stackrel{\→}{\mathrm{dst}}\left|\right|}{T_{\mathrm{deadline}}}$

Wherein, the branch subrepresentation destination node of this formula and the distance between the present node, denominator is represented the transmission delay requirement.This velocity amplitude V brings in constant renewal in the multihop network transmission; When same node is transmitted a plurality of packet; The sequencing of packet is transmitted in size decision according to speed, thereby has guaranteed can be transferred to the table node in the short period of time to delay requirement higher data bag.

Said method has reduced the time-delay in the transmission course, but its mechanism is confined to wireless sense network inside, and has increased energy consumption.

Summary of the invention

Technical problem to be solved by this invention is: a kind of heterogeneous network QoS self adaptation self-optimizing transmission method is provided; This method can be with short time-delay reporting system data center exactly; Make system in the very first time, carry out relevant treatment, guaranteed professional QoS to accident.

For solving the problems of the technologies described above, the present invention adopts following technical scheme.

A kind of heterogeneous network QoS self adaptation self-optimizing transmission method may further comprise the steps:

Step 1, two kinds of operating states of node are set: normal operating conditions and critical activity state, wherein the transmitting power under the normal operating conditions is P _Normal, the transmitting power under the critical activity state is P _EmergentOr P _Guarantee, whether the switching of two kinds of operating states surpasses the threshold value decision by the data value that collects;

Step 2 is when node gets into the critical activity state, from P _EmergentWith P _GuaranteeThe middle suitable transmission power of selecting, near the portable terminal seeking then is as mobile gateway;

Step 3 is provided with the professional time-delay that ensures, the mobile gateway that node is received in business guarantee time-delay is replied and is designated as effectively;

Step 4, node calculates the weight of the portable terminal of receiving effective answer, and selects the maximum mobile gateway of weight to jump gateway transmission urgency traffic data as one.

As a kind of preferred version of the present invention, in the step 4, after node is accomplished the selection of mobile gateway, reconcile the transmitting power of self once more, make the urgency traffic data can a jump set transport to portable terminal just as a said jumping gateway.

As another kind of preferred version of the present invention, said transmission method also comprises step 5, accomplishes and after node gets into normal operating conditions again the transmitting power P when node comparison self jumper connection is gone into mobile gateway in the urgency traffic transfer of data _1-hopWith the transmitting power P under the normal operating conditions _NormalSize, if P _1-hop≤P _Normal, then node keeps a jumper connection to go into mobile gateway to transmitting data; Otherwise the node disconnection is connected with mobile gateway, connects father node again and carries out transfer of data.

As another preferred version of the present invention; In the step 4; If node is not received effective mobile gateway and is replied in business guarantee time-delay; Then node can transmit the urgency traffic data to father node according to normal operating conditions, and father node can stop the transmission of all the other general service data after receiving the urgency traffic data, send the urgency traffic data with all strength.

As another preferred version of the present invention, in the step 1, P _NormalValue be the transmitting power that node just can a jump set be transported to father node; After node got into the critical activity state, it was P that the transmitting power of node under the critical activity state is set _Emergent, professional guarantee transmitting power is P _Guarantee, current maximum transmission power is P _MaxP wherein _GuaranteeValue be the transmitting power that node just can a jump set be transported to current gateway, P _MaxThen the maximum transmission power by residue energy of node and node itself determines jointly; The transmitting power of node under the critical activity state is:

$P_{\mathrm{Emergent}}=\frac{W}{W_{\mathrm{Max}}}{P}_{\mathrm{Max}}$

Wherein, W is a weight factor, W _MaxBe the maximum of weight factor, W is:

W＝α·P+β·Q+γ·T+η·E+λ·H

Wherein, P is a service priority, and Q is the traffic carrying capacity size, and T is a type of service, and E is a residue energy of node, and H is the jumping figure of nodal distance mobile gateway; α, beta, gamma, η, λ are respectively to the variation coefficient of dependent variable P, Q, T, E, H, and said variation coefficient is according to the variable-value difference and dynamic adjustable.

As another preferred version of the present invention, step 1 also comprises: node goes out the professional transmitting power P that ensures according to the distance calculation of self and affiliated mobile gateway _Guarantee, and the relatively more professional transmitting power P that ensures _GuaranteeWith current maximum transmission power P _MaxSize, if P _Guarantee≤P _Max, then the transmitting power of node is P _GuaranteeOtherwise node calculates from the transmitting power P under the critical activity state _Emergent, the transmitting power of node is P _Emergent

As another preferred version of the present invention, said professional guarantee time-delay is Γ, and the value of Γ is relevant with service priority P, and high more then Γ is more little for service priority, and low more then Γ is big more for service priority.

As another preferred version of the present invention, in the step 4, the weight of the portable terminal of said effective answer is:

$l=f(d,\stackrel{\→}{v})$

Wherein, D is the distance of node and portable terminal, and is the velocity of portable terminal; Select the maximum portable terminal of weight to jump gateway transmission urgency traffic data as one.

Beneficial effect of the present invention is:

(1) the present invention is through ensureing the setting of time-delay to urgent transmitted power, professional power and the business of ensureing; Make wireless sense network when finding urgency traffic; Can be fast, efficient, low delay utilize Cellular Networks with the urgency traffic transfer of data to data center; Guaranteed the QoS of burst service, made system deal with accident with plenty of time more;

(2) the present invention is confirming to reduce transmitting power behind the portable terminal through node, and the state of emergency finishes the selection that the back is relatively carried out route after two transmitting powers again, makes that the node energy consumption in the wireless sense network reduces, and has effectively prolonged network life cycle;

(3) the method for the invention is improved the energy consumption in the wireless sense network and the two big performances of delaying time, and makes network configuration more reasonable, and the information transmission is more timely, has guaranteed the QoS of burst service, and the node life-span also further prolongs.

Description of drawings

Fig. 1 is the application scenarios sketch map of heterogeneous network QoS self adaptation self-optimizing transmission method of the present invention;

Fig. 2 is the decisive factor sketch map of the transmitting power under the critical activity state;

Fig. 3 is the flow chart of heterogeneous network QoS self adaptation self-optimizing transmission method of the present invention;

Fig. 4 is the structural representation of embodiment two described Taihu Lake lake environment monitoring systems;

Fig. 5 is the scene sketch map of embodiment two described heterogeneous network QoS self adaptation self-optimizing transmission methods.

Embodiment

The invention discloses a kind of heterogeneous network QoS self adaptation self-optimizing transmission method; This method is based on the countermeasure that high priority burst service QoS ensures; Belong to heterogeneous network integration technology field, pooled applications is in existing and being easy to generate in the environmental monitoring and life monitoring of high priority burst service, like water quality monitoring; Forest fire monitoring, vital signs monitoring etc.

Suitable scene of the present invention is positioned to exist simultaneously the place of Cellular Networks and the covering of sensing net; As shown in Figure 1; A large amount of portable terminals have bimodulus (having two kinds of access waies of Cellular Networks and sensing net) function and can move different business simultaneously; Data acquisition equipment can be collected the multiple business categorical data, and certain storage, analysis and calculation function can be provided.

The final goal of the method for the invention is that back time delay of data transmission and packet loss take place strict control high priority burst service; Cut down the consumption of energy as possible on this basis; Prolong the life cycle of network, optimize network configuration, finally reach in time, handle efficiently this target of accident.

The present invention is mainly according to service priority, type of service, traffic carrying capacity size; Factors such as the residing geographical position of node itself and self energy consumption; Dynamically the transmitted power of adjustment node is selected only mobile gateway in its communication coverage, with the shortest time with high priority burst service transfer of data to the system data center; Guarantee the validity and the reliability of data, and after the high priority burst service finishes, again network configuration is optimized.

Method of the present invention can make system in the very first time, carry out relevant treatment to this accident with short time-delay reporting system data center exactly, has guaranteed professional QoS.

Do further explain below in conjunction with the accompanying drawing specific embodiments of the invention.

Embodiment one

Present embodiment provides a kind of heterogeneous network QoS self adaptation self-optimizing transmission method; As shown in Figure 3; The applied environment of this method is: the residing position of all nodes is all covered by sensing net and Cellular Networks simultaneously, and node can dynamically be adjusted the transmitting power of oneself, and node is in one line to be linked into residential gateway with the multi-hop form; Node can be collected the multiple business categorical data, and certain storage, analysis and calculation function can be provided; Each node is all known the distance between own and the residential gateway; Near node, have a large amount of bimodulus Cellular Networks portable terminals, node carries out the switching of network when making things convenient for unexpected incidents to take place.

The described heterogeneous network QoS self adaptation of present embodiment self-optimizing transmission method comprises the steps:

Two kinds of operating states of data acquisition equipment (being node) 1, at first are set: normal operating conditions and critical activity state, wherein the transmitting power under the normal operating conditions is P _Normal, whether the switching of two kinds of operating states surpasses the threshold value decision by the data value that collects; P _NormalValue be the transmitting power that node just can a jump set be transported to father node.After getting into the critical activity state, the transmitting power under the definition critical activity state is P _Emergent, professional guarantee transmitting power is P _Guarantee, current maximum transmission power is P _MaxP wherein _GuaranteeValue be the transmitting power that node just can a jump set be transported to current gateway, P _MaxThen the maximum transmission power by residue energy of node and node itself determines jointly, and the calculating of the transmitting power under the critical activity state is following:

$P_{\mathrm{Emergent}}=\frac{W}{W_{\mathrm{Max}}}{P}_{\mathrm{Max}}---\left(1\right)$

In the formula (1), W is a weight factor, W _MaxBe the maximum of weight factor, the calculating of W is following:

W＝α·P+β·Q+γ·T+η·E+λ·H (2)

In the formula (2), P is a service priority, and Q is the traffic carrying capacity size, and T is a type of service, and E is a residue energy of node, and H is the jumping figure of nodal distance mobile gateway; Then respectively corresponding each variation coefficient of α, beta, gamma, η, λ, these coefficients can be according to the variable-value differences and dynamic adjustable, thereby power to make decision repeated factor more accurately effectively reduces energy consumption.Fig. 2 is the decisive factor sketch map of the transmitting power under the critical activity state.

Node goes out P according to the distance calculation of self and affiliated mobile gateway _Guarantee, and compare P _GuaranteeWith P _Max, if P _Guarantee≤P _Max, then the transmitting power of node is P _Guarantee, otherwise node calculates its P _Emergent, can know P by formula (1) _Emergent≤P _Max, the node transmitting power is P _Emergent

2, if transmitting power is P _Emergent, after then node got into the state of emergency, node will be with P _GuaranteeOr P _EmergentNear seeking mobile gateway.

If transmitting power is P _Guarantee, can guarantee that then node can find at least one network terminal (gateway under this node), thereby guarantee that the urgency traffic data can transfer to the system data center with less time-delay.

3, the professional time-delay Γ that ensures of definition, the value of Γ is relevant with service priority, and high more then Γ is more little for service priority, and low more then Γ is big more for service priority.The mobile gateway of in business guarantee time-delay Γ, receiving is replied and is designated as effectively.

The professional purpose of time-delay Γ that ensures is to guarantee that business datum can be sent to data center in the short period of time, prevents because of there not being mobile gateway to cause the generation of phenomenons such as sky near the node.When selecting mobile gateway to jump gateway as one, the weight that node can calculate the portable terminal of receiving effective answer is:

$l=f(d,\stackrel{\→}{v})---\left(3\right)$

In the formula (3); D is the distance of node and portable terminal, and

is the velocity of portable terminal.Select the maximum portable terminal of weight to jump gateway transmission urgency traffic data as one.After selecting portable terminal to accomplish, node is adjusted its transmitting power once more, makes it equal just can a jump set to transport to the transmitting power P of selected portable terminal _1-hop, to reach the purpose of saving energy consumption.If node is not received effective mobile gateway and is replied in business guarantee time-delay; Then node can transmit the urgency traffic data to father node according to normal operating conditions; And father node can stop the transmission of all the other general service data after receiving the urgency traffic data, sends the urgency traffic data with all strength.

4, accomplish and after node got into normal operating conditions again, node is P relatively in the urgency traffic transfer of data _1-hopWith P _Normal, if P _1-hop≤P _Normal, then node keeps a jumper connection to go into mobile gateway to transmitting data, to reduce the energy consumption of original father node in the wireless sense network; Otherwise the node disconnection is connected with mobile gateway, connects said father node again and carries out transfer of data.

The method of the invention is summed up as follows:

How urgent this type of trigger event specific transactions that the method that the present invention proposes is primarily aimed at real-time utilizes heterogeneous network to transfer to data center fast timely.

The present invention is directed to above-mentioned deficiency, under the background that heterogeneous network merges, auxiliary through Cellular Networks, the time-delay of high priority burst service transmission can further be reduced, and improves the reliability of data, thereby better guarantee professional QoS.After data acquisition equipment detects the high priority burst service,, seek suitable mobile gateway through dynamic adjustment power, finally through heterogeneous network with the transfer of data of accident to data center.Heterogeneous network merges and constantly to receive publicity in recent years, effectively reduces time-delay based on the data transmissions of heterogeneous network, improves performance, guarantees the QoS of system requirements.

In fact, merge through heterogeneous network, under the condition that guarantees certain energy consumption, transmission delay can further reduce when accident took place.The present invention reaches under normal condition and reduces system energy consumption through the normal condition and the state of emergency of defined node, prolongs network life cycle; In case of emergency reduce time-delay, guarantee the timely transmission of burst service.Cellular Networks has strong difficult interference of stability, energy sufficient (for wireless sensing node), and it is little to delay time, characteristics such as applied range.To These characteristics, the characteristics of applied range especially, the present invention selects Cellular Networks to assist the sensing net to accomplish the transmission of high priority burst service data, reaches to reduce time-delay, guarantees the target of data reliability.

Concrete scheme of the present invention is: when sensing net node (being foregoing node) when having the burst type high-priority service to transmit, at first node is searched the cell phone gateway, uses urgent transmitting power P _EmergentThe perhaps professional transmitting power P that ensures _GuaranteeThe transmission data, then after having taken all factors into consideration parameters such as energy consumption and time-delay the selection and adjust rational transmitting power, guaranteed the QoS of professional transmission, reduced energy consumption.In the present invention, urgent transmitting power P _EmergentCalculating relevant with traffic carrying capacity, type of service, service priority, data acquisition equipment dump energy and present position; And coefficient is adjustable according to the Different Dynamic of the difference of each parameter value and application scenarios before the above-mentioned parameter; Urgency level according to business; Apart from the urgent transmitting power of far and near reasonably adjustment of gateway distance, and guarantee that its value is not more than the current maximum transmission power of data acquisition equipment.Data acquisition equipment flexible adjustment transmitting power under the state of emergency be can effectively guarantee through this coefficient of dynamic adjustment, energy consumption and time-delay reduced, the QoS when guaranteeing the system burst business data transmission.The present invention dynamically adjusts transmitting power according to the relevant information of mobile gateway.Take place in emergency case; The selected suitable portable terminal of data acquisition equipment as one jump mobile gateway with the transmitting burst business datum after; Data acquisition equipment calculates distance between the two according to propagation delay, reduces its transmitting power to the transmitting power of just can a jump set transporting to selected portable terminal; Reduce energy consumption, and then prolonged the network lifetime of node.Basis for estimation when the present invention proposes to select weight l to select as mobile gateway; The value of l is relevant with the position of portable terminal and moving direction: after getting into the state of emergency; Portable terminal is jumped mobile gateway as one around the data acquisition equipment search, and mobile gateway is replied the information such as position, moving direction and speed of oneself.Node calculates the weighted value l at each terminal when selecting portable terminal, selects the maximum portable terminal of weighted value to jump mobile gateway as one.The weight maximum means that required transmitting power is minimum, therefore uses such scheme can effectively reduce the data acquisition equipment energy consumption.The present invention has defined professional guarantee time-delay Γ, and the value of Γ is relevant with service priority, and high more then Γ is more little for service priority.After getting into the state of emergency; Portable terminal is jumped mobile gateway as one around the data acquisition equipment search; The mobile gateway of in time Γ, receiving is replied and is designated as effectively; Surpass portable terminal that this business guarantee time-delay receives and reply and be designated as invalidly, calculate in the weight factor process carrying out, only calculate effective portable terminal and reply.This scheme has been guaranteed the controllability of time-delay, avoids factor to cause the generation of phenomenons such as sky according to not having portable terminal near the collecting device simultaneously.When data acquisition equipment by critical activity recovering state to normal operating conditions following time; At first relatively a jumping transmitting power of data acquisition equipment to mobile gateway and the transmitting power under original normal operating conditions under the state of emergency keep a jumping to connect mobile gateway with decision and perhaps recover original route.This method can be selected routed path flexibly, guarantees to communicate with minimum power, reduces the energy consumption of father node in original sensing net, prolongs network life cycle.

The present invention possesses following advantage:

The present invention is through ensureing the setting of time-delay to urgent transmitted power, professional power and the business of ensureing; Make wireless sense network when finding urgency traffic; Can be fast, efficient, low delay utilize Cellular Networks with the urgency traffic transfer of data to data center; Guaranteed the QoS of burst service, made system deal with accident with plenty of time more;

The present invention is confirming to reduce transmitting power behind the portable terminal through node, and the state of emergency finishes the selection that the back is relatively carried out route after two transmitting powers again, makes that the node energy consumption in the wireless sense network reduces, and has effectively prolonged network life cycle;

The method of the invention is improved the energy consumption in the wireless sense network and the two big performances of delaying time, and makes network configuration more reasonable, and the information transmission is more timely, has guaranteed the QoS of burst service, and the data acquisition equipment life-span also further prolongs.

Embodiment two

Present embodiment considers that an accident processing scene that typically merges based on the controlled heterogeneous network of time-delay is described in detail the method for the invention.

The processing scene is: on May 28th, 2007, Wuxi Taihu Lake area blue-green algae large tracts of land outburst causes Wuxi City running water severe contamination, and the urban district pure water is made a mad rush for, and broad masses of the people's life has been caused very big influence.

As shown in Figure 4, a plurality of data collection facilities of littoral layout are used to collect water quality information in Taihu Lake, and the monitoring lake environment adopts multi-hop wireless sensing net to bimodulus mobile gateway transmission data, by mobile gateway Monitoring Data is forwarded to system data center (base station) again.In Taihu Lake during blue algae bloom; Node detection is to the generation of this disaster incident; If adopt method of the present invention, reporting system data center in the short period of time, thus all departments can be adopted an effective measure fast timely; Preventing disasters further enlarges, and avoids people's life is caused significant impact.

Heterogeneous network QoS self adaptation self-optimizing transmission method of the present invention concrete implementation procedure in the present embodiment is:

(1) calculating of urgent transmitted power

Can know that from formula (1) and formula (2) the calculating key of urgent transmitted power is the calculating of weighted value, its weight calculation formula is:

W＝α·P+β·Q+γ·T+η·E+λ·H

Wherein P is a service priority, and Q is the traffic carrying capacity size, and T is a type of service, and E is a residue energy of node, and H is the jumping figure of nodal distance mobile gateway, and concrete value of each variable and actual scene corresponding relation are as shown in table 1.

Table 1: concrete value of each variable and actual scene corresponding relation

Wherein the interested type of service of institute of the value of T and system is relevant.In the blue algae monitoring application scenarios of Taihu Lake, the collectable type of service of node has: water temperature, blue-green algae concentration, dissolved oxygen, pH value, conductivity etc.If system is very interested in the data of blue-green algae concentration, and is interested in pH value, then when the collection data were blue-green algae concentration, T was 5, and when the collection data were pH value, T was 3, and when the collection data were other parameters, T was 1.

α in the formula (2), beta, gamma, η, coefficient before respectively corresponding each variable of λ, it satisfies condition

α+β+γ+η+λ＝1 (0≤α，β，γ，η≤1)

Associative list 1 can be released W _MaxBe 5, defined each coefficient of the present invention is along with the Different Dynamic of variate-value is adjustable.For example:

A) when collected service priority promptly is P=5 for extreme, get α=1, beta, gamma, η, λ=0, W=W at this moment _MaxCorresponding practical significance breaks out like blue-green algae for being the extreme urgency traffic when collected business, near portable terminal node will be sought with maximum power at this moment; Increase the probability that finds portable terminal, thereby guarantee the extreme urgency traffic to be transferred to the system data center with the shortest time.

B) when alpha+beta+η≤5, get α, beta, gamma=0.1, η=0.35, λ=0.35.Corresponding practical significance is not when being very urgent when collected business, and node is considered the jumping figure of current remaining and nodal distance mobile gateway emphatically, thereby avoids the waste of unnecessary energy, the prolongation network lifecycle.

Through the calculating of weighted value, the dynamic adjustment of parameter, node can the joint business situation and the self rest energy situation confirm transmitting power, flexibly time-delay and energy consumption are accepted or rejected, thereby completion is to the effectively optimizing of network.

(2) controlled based on the time-delay of heterogeneous network fusion

As shown in Figure 5, behind the blue algae bloom of Taihu Lake, source node at first collects this disastrous information.If source node is upwards propagated this information by original path multi-hop, then will inevitably bring bigger time-delay, cause system the back to take place and make timely reaction in the time the most effectively tackling in disaster.Source node has been confirmed urgent transmitted power in step () after, near the mobile gateway searching is confirmed the business guarantee time-delay of this node simultaneously.

In business guarantee time-delay, source node is received portable terminal A, B, the information-reply of C.Because portable terminal D apart from too far away, fails in business guarantee time-delay, to reply relevant information, so portable terminal A, B, the answer bag of C is designated as effectively, and it is invalid that the answer bag of D is designated as.Node calculates portable terminal A then; B, the weight of C is because portable terminal A compares portable terminal C apart from nearer with B; Though and portable terminal A and B are close with the source node distance; But portable terminal A is just away from source node, and portable terminal B is just near source node, so source node finally selects portable terminal B to jump gateway to transmitting data as one.

This moment source node break off with original wireless sense network in being connected of father node; The transmitting power of adjusting oneself makes its lucky ability one jump set transmission of data to portable terminal B; Send the burst service data to portable terminal B; Portable terminal B utilizes the Cellular Networks channel that the burst service data are transferred to the system data center rapidly, thereby effectively reduced disaster the time-delay in the alert data transmission course of back takes place.

Behind the burst transaction end of transmission, the system restoration normal operating conditions.This moment, source node can relatively be sent to the transmitting power and the transmitting power that is sent to father node in original sensing net of portable terminal B; Because portable terminal B is more near source node; Therefore source node still transmits the regular traffic data through portable terminal B to data center, inserts wireless sense network but not break off again with being connected of portable terminal B.Can effectively reduce the energy consumption of intermediate transmission node under the normal operating conditions through aforesaid operations, prolong network lifecycle.

On the one hand, through the assistance of cellular network, after accident took place, the burst service data can be sent to the system data center fast, reduce transmission delay, guaranteed QoS of survice, for system has won valuable time to the processing of accident.On the other hand, when returning to normal operating conditions, Cellular Networks can assist wireless sense network to carry out the network optimization, reduces the intermediate node energy consumption, thereby prolongs network life.

The present invention dynamically adjusts transmitting power through calculating weighted value, sets up professional guarantee to delay time, and is guaranteeing that accident the back takes place transmits on the basis of quick and low delay, the energy consumption when reducing node transmission data, thereby the life cycle that prolongs whole network.

Description of the invention and application are illustrative, are not to want with scope restriction of the present invention in the above-described embodiments.Here the distortion of the embodiment that is disclosed and change are possible, and the replacement of embodiment is known with the various parts of equivalence for those those of ordinary skill in the art.Those skilled in the art are noted that under the situation that does not break away from spirit of the present invention or substantive characteristics, and the present invention can be with other forms, structure, layout, ratio, and realize with other elements, material and parts.

Claims (8)

1. a heterogeneous network QoS self adaptation self-optimizing transmission method is characterized in that, may further comprise the steps:

Step 1, two kinds of operating states of node are set: normal operating conditions and critical activity state, wherein the transmitting power under the normal operating conditions is P _Normal, the transmitting power under the critical activity state is P _EmergentOr P _Guarantee, whether the switching of two kinds of operating states surpasses the threshold value decision by the data value that collects;

Step 2 is when node gets into the critical activity state, from P _EmergentWith P _GuaranteeThe middle suitable transmission power of selecting, near the portable terminal seeking then is as mobile gateway;

Step 3 is provided with the professional time-delay that ensures, the mobile gateway that node is received in business guarantee time-delay is replied and is designated as effectively;

Step 4, node calculates the weight of the portable terminal of receiving effective answer, and selects the maximum mobile gateway of weight to jump gateway transmission urgency traffic data as one.

2. heterogeneous network QoS self adaptation self-optimizing transmission method according to claim 1; It is characterized in that: in the step 4; After node is accomplished the selection of mobile gateway; Reconcile the transmitting power of self once more, make the urgency traffic data can a jump set transport to portable terminal just as a said jumping gateway.

3. heterogeneous network QoS self adaptation self-optimizing transmission method according to claim 2 is characterized in that said transmission method also comprises:

Step 5 is accomplished and after node gets into normal operating conditions again the transmitting power P when node comparison self jumper connection is gone into mobile gateway in the urgency traffic transfer of data _1-hopWith the transmitting power P under the normal operating conditions _NormalSize, if P _1-hop≤P _Normal, then node keeps a jumper connection to go into mobile gateway to transmitting data; Otherwise the node disconnection is connected with mobile gateway, connects father node again and carries out transfer of data.

4. heterogeneous network QoS self adaptation self-optimizing transmission method according to claim 1; It is characterized in that: in the step 4; If node is not received effective mobile gateway and is replied in business guarantee time-delay; Then node can transmit the urgency traffic data to father node according to normal operating conditions, and father node can stop the transmission of all the other general service data after receiving the urgency traffic data, send the urgency traffic data with all strength.

5. heterogeneous network QoS self adaptation self-optimizing transmission method according to claim 1 is characterized in that: in the step 1, and P _NormalValue be the transmitting power that node just can a jump set be transported to father node; After node got into the critical activity state, it was P that the transmitting power of node under the critical activity state is set _Emergent, professional guarantee transmitting power is P _Guarantee, current maximum transmission power is P _MaxP wherein _GuaranteeValue be the transmitting power that node just can a jump set be transported to current gateway, P _MaxThen the maximum transmission power by residue energy of node and node itself determines jointly; The transmitting power of node under the critical activity state is:

$P_{\mathrm{Emergent}}=\frac{W}{W_{\mathrm{Max}}}{P}_{\mathrm{Max}}$

Wherein, W is a weight factor, W _MaxBe the maximum of weight factor, W is:

W＝α·P+β·Q+γ·T+η·E+λ·H

Wherein, P is a service priority, and Q is the traffic carrying capacity size, and T is a type of service, and E is a residue energy of node, and H is the jumping figure of nodal distance mobile gateway; α, beta, gamma, η, λ are respectively to the variation coefficient of dependent variable P, Q, T, E, H, and said variation coefficient is according to the variable-value difference and dynamic adjustable.

6. heterogeneous network QoS self adaptation self-optimizing transmission method according to claim 5 is characterized in that step 1 also comprises: node goes out the professional transmitting power P that ensures according to the distance calculation of self and affiliated mobile gateway _Guarantee, and the relatively more professional transmitting power P that ensures _GuaranteeWith current maximum transmission power P _MaxSize, if P _Guarantee≤P _Max, then the transmitting power of node is P _GuaranteeOtherwise node calculates from the transmitting power P under the critical activity state _Emergent, the transmitting power of node is P _Emergent

7. heterogeneous network QoS self adaptation self-optimizing transmission method according to claim 1 is characterized in that: said professional guarantee time-delay is Γ, and the value of Γ is relevant with service priority P, and high more then Γ is more little for service priority, and low more then Γ is big more for service priority.

8. heterogeneous network QoS self adaptation self-optimizing transmission method according to claim 1, it is characterized in that: in the step 4, the weight of the portable terminal of said effective answer is:

$l=f(d,\stackrel{\→}{v})$

Wherein, D is the distance of node and portable terminal, and

is the velocity of portable terminal; Select the maximum portable terminal of weight to jump gateway transmission urgency traffic data as one.

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