CN102083139B - Data forwarding control method, device and system - Google Patents
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Abstract
The invention discloses a data forwarding control method, device and system. The data forwarding control method comprises the following steps: receiving the summarized information of data forwarding capability of each sensor node, wherein, the summarized information is sent by each mobile gathering point; according to the summarized information, generating a two-dimensional matrix about the mobile gathering points and the sensor nodes; processing the two-dimensional matrix by a competitive algorithm, and ensuring that each line in the two-dimensional matrix contains one nonzero value at most, i.e. each sensor node contains one mobile gathering point at most to forward data; and according to the processing result of the two-dimensional matrix, pairing the sensor nodes and the mobile gathering points. The data forwarding control method, device and system are characterized in that the mobile gathering nodes and the sensor nodes requiring data forwarding are subjected to one-to-one data forwarding pairing, so that the mobile gathering node has balanced load, and the phenomena of route blockage of certain mobile gathering node and quick exhaustion of energy can be eliminated.
Description
Technical field
The present invention relates to a kind of communication network technology, relate in particular to a kind of data forwarding controlling method, Apparatus and system.
Background technology
In wireless sensor network, generally include following two types node: a kind of is sensor node (Sensor Node), is equipped with various types of transducers on this category node, is responsible for detection and perception to surrounding environment; Another is aggregation node (Sink Node), and this category node has the function of collecting from other sensor node information.And usually all be equipped with plural network interface, the wireless sensor network node by wireless sensor network interface and bottom communicates on the one hand, on the other hand Ethernet or the wireless network access upper layer network by connecting.
Aggregation node is divided into again fixedly aggregation node and mobile sink node, and than fixing aggregation node, mobile sink node has can realize the advantages such as uniform network load Distribution, energy repeat to replenish.Particularly when with portable terminal (Mobile Terminal, be called for short MT) during as mobile sink node, can also help to utilize that a large amount of commercial portable terminals that exist reduce the sensor network disposition cost effectively on the market.In addition, utilize immanent portable terminal, can also greatly prolong network life, improve network performance.
Radio sensing network and mobile network's combination has great realistic meaning and economic worth, the two combination is the basis of realizing following " Ubiquitous Network ", is a study hotspot in present Sensor Network field and moving communicating field and the field of calculating.Wherein, the final jump sensing node is the key of two network integrations to effective connection of mobile sink node.Present technical scheme supposes that all each sensing node chooses the route of mobile sink node voluntarily, mainly has the shortcoming of the following aspects:
1. suppose generally that sensor node carries out the selection of mobile sink node voluntarily, therefore under the scene of many mobile sink nodes, producing a plurality of source nodes has all selected same mobile sink node to carry out the state of the load imbalance of data retransmission, thereby, cause the route obstruction of certain aggregation node and exhausting fast of energy;
2. the disordered state of this each sensing node autonomy will be aggravated competition and conflict, special when the sensing node One's name is legion, this competition and conflict will reach the intolerable degree of system, and because each node need to be monitored the communications status of other nodes, not only waste the finite energy of sensing node preciousness, and worsened the data retransmission time-delay.
Summary of the invention
The object of the invention is to, a kind of data forwarding controlling method, Apparatus and system are provided so that the mobile sink node load balancing, avoid the route of mobile sink node stop up and sensor node between vie each other.
For achieving the above object, according to an aspect of the present invention, provide a kind of data forwarding controlling method, comprising:
The integrated information for the forwarding data ability of each sensor node that receives that each mobile sink point sends, and generate two-dimensional matrix about mobile sink node and sensor node according to described integrated information;
To the processing of described two-dimensional matrix, so that every delegation only has at most a nonzero value in the described two-dimensional matrix, namely to only have at most a mobile sink node be its forwarding data to each sensor node by Competitive Algorithms;
According to the result to described two-dimensional matrix described sensor node and mobile sink node are matched;
Describedly comprise by the operation of processing of Competitive Algorithms to described two-dimensional matrix:
Search and only have to be the row of nonzero value, and judge that whether these nonzero values are at identical row; If at identical row, select delegation to keep its nonzero value or reservation has peaked row, the corresponding column position zero setting of remaining row then at random from these row; If these nonzero values are distributed in different row, then each row keeps its nonzero value separately;
Judge whether each row only has at most a nonzero value in described each row two-dimensional matrix, if so, process ends; If not, then searching has two to be the row of nonzero value, judges whether these nonzero values are in identical row; If at identical row, then each row is selected a nonzero value in different row, or each row selects a nonzero value in different row, makes sum total maximum, all the other zero setting; If at different row, then each row is selected a nonzero value in different row, and perhaps each row keeps its maximum, all the other zero setting;
Judge whether each row only has at most a nonzero value in described each row two-dimensional matrix, if so, process ends; If not, search successively in the manner described above and be the row of nonzero value more than three and three, and corresponding the processing, until every row only has at most a nonzero value in the described two-dimensional matrix.
For achieving the above object, according to another aspect of the present invention, provide a kind of data retransmission control device, comprising:
The matrix generation module is used for the integrated information for the forwarding data ability of each sensor node that sends according to each mobile sink point that receives, and generation is about the two-dimensional matrix of mobile sink node and sensor node;
The matrix disposal module is used for searching to only have to be the row of nonzero value, and judges that whether these nonzero values are at identical row; If at identical row, select delegation to keep its nonzero value or reservation has peaked row, the corresponding column position zero setting of remaining row then at random from these row; If these nonzero values are distributed in different row, then each row keeps its nonzero value separately; Judge whether each row only has at most a nonzero value in described each row two-dimensional matrix, if so, process ends; If not, then searching has two to be the row of nonzero value, judges whether these nonzero values are in identical row; If at identical row, then each row is selected a nonzero value in different row, or each row selects a nonzero value in different row, makes sum total maximum, all the other zero setting; If at different row, then each row is selected a nonzero value in different row, and perhaps each row keeps its maximum, all the other zero setting; Judge whether each row only has at most a nonzero value in described each row two-dimensional matrix, if so, process ends; If not, search successively in the manner described above and be the row of nonzero value more than three and three, and corresponding the processing, until every row only has at most a nonzero value in the described two-dimensional matrix;
Matching module is used for according to the result of described two-dimensional matrix is matched to described sensor node and mobile sink node.
For achieving the above object, according to another aspect of the present invention, provide a kind of data forwarding system, comprising:
Sensor node is used for sending solicited message to mobile sink node when having data to transmit;
Mobile sink node, be used for when receiving described request information, judge whether to be described sensor node forwarding data according to channel conditions, and the integrated information that generates for the forwarding data ability of each sensor node is sent to described data retransmission control device;
The data retransmission control device, be used for according to the two-dimensional matrix of the described integrated information generation that receives about mobile sink node and sensor node,, and according to the result to described two-dimensional matrix described sensor node and mobile sink node are matched to the processing of described two-dimensional matrix by Competitive Algorithms; Describedly comprise by the operation of processing of Competitive Algorithms to described two-dimensional matrix: search and only have to be the row of nonzero value, and judge that whether these nonzero values are at identical row; If at identical row, select delegation to keep its nonzero value or reservation has peaked row, the corresponding column position zero setting of remaining row then at random from these row; If these nonzero values are distributed in different row, then each row keeps its nonzero value separately; Judge whether each row only has at most a nonzero value in described each row two-dimensional matrix, if so, process ends; If not, then searching has two to be the row of nonzero value, judges whether these nonzero values are in identical row; If at identical row, then each row is selected a nonzero value in different row, or each row selects a nonzero value in different row, makes sum total maximum, all the other zero setting; If at different row, then each row is selected a nonzero value in different row, and perhaps each row keeps its maximum, all the other zero setting; Judge whether each row only has at most a nonzero value in described each row two-dimensional matrix, if so, process ends; If not, search successively in the manner described above and be the row of nonzero value more than three and three, and corresponding the processing, until every row only has at most a nonzero value in the described two-dimensional matrix.
Data forwarding controlling method of the present invention, Apparatus and system, by mobile sink node and the sensing node that needs data retransmission are carried out one to one data retransmission pairing, so that the mobile sink node load balancing is avoided the route obstruction of certain mobile sink node and exhausting fast of energy.Simultaneously, sensor node and mobile sink node do not need mutually to monitor communications status separately again, have reduced the disorderly competition between the sensor node, save the energy of sensor node, and reduce the time-delay of data retransmission.
Description of drawings
Fig. 1 is the flow chart of data forwarding controlling method embodiment of the present invention;
Fig. 2 is a kind of two-dimensional matrix schematic diagram that data retransmission control device of the present invention generates;
Fig. 3 is the another kind of two-dimensional matrix schematic diagram that data retransmission control device of the present invention generates;
Fig. 4 is the flow chart of among the data forwarding controlling method embodiment of the present invention two-dimensional matrix being processed;
Fig. 5 a, Fig. 5 b, Fig. 5 c are the result schematic diagrames that among the data forwarding controlling method embodiment of the present invention a kind of two-dimensional matrix is carried out each step in the processing procedure;
Fig. 6 a, Fig. 6 b, Fig. 6 c are the result schematic diagrames that among the data forwarding controlling method embodiment of the present invention another kind of two-dimensional matrix is carried out each step in the processing procedure;
Fig. 7 is data retransmission control device example structure figure of the present invention;
Fig. 8 is data forwarding system example structure figure of the present invention.The present invention is described in detail below in conjunction with accompanying drawing.
The present invention is described in detail below in conjunction with accompanying drawing for embodiment.
Embodiment of the method
Fig. 1 is the flow chart of data forwarding controlling method embodiment of the present invention.As shown in Figure 1, the present embodiment may further comprise the steps:
Step 102 when the sensor node in the network has data to transmit, sends solicited message to mobile sink node in the mode of time-division, frequency division or competition, can carry the ID of oneself in the solicited message, and the qos parameter information that requires;
The matrix I, if the integrated information that each mobile sink node reports just simple its can be carried out the ID of those sensing nodes of data retransmission, data retransmission control device structural matrix I form then, there is the sensing node of id information to represent that this mobile sink node can be it and carries out data retransmission, sensing node without id information represents that then this mobile sink node can not carry out data retransmission for it, as shown in Figure 2; In the matrix I, the row coordinate represents mobile sink node, and row-coordinate represents sensing node, and the described mobile sink node of " 1 " expression can be the forwarding data of the sensor node of correspondence; The corresponding mobile sink node of " 0 " expression can not be the sensor node forwarding data of correspondence; Therefore, just can find out intuitively from Fig. 2 which sensing node which aggregation node can carry out data retransmission for;
The matrix II, if the integrated information that each mobile sink node reports except comprise those its can carry out the ID of those sensing nodes of data retransmission, also comprise other information, as sensor node to as described in mobile sink node link quality information, as described in mobile sink node itself power status information, as described in the precedence information of the desired delayed data of sensor node and/or required forwarding information;
As shown in Figure 3, in the matrix II, the corresponding mobile sink node of " 0 " expression can not be the sensor node forwarding data of correspondence; Nonzero value C
I, jRepresent that corresponding mobile sink node is the quantized value of the ability of corresponding sensor node forwarding data; Nonzero value C
I, jCan require according to the difference of system the different information of expression, for example: can represent that the source sensor node is to the Link State of mobile sink node, also can be the energy state of expression mobile sink node, the perhaps priority of various information be even with the different requirements of information to time-delay; For paring down expenses, can consider these information are carried out to a certain degree quantification, quantified precision is higher, and then feedack is more, and expense is larger; As non-zero values C
I, jThe expression sensing node is to the link-quality of mobile sink node, and the highest achievable rate that calculates with shannon formula characterizes, if adopt 3 bit quantization precision, then non-zero values C
I, jSpan be (1,2 ..., 7);
In the present embodiment, by mobile sink node and the sensing node that needs data retransmission are carried out one to one data retransmission pairing, so that the mobile sink node load balancing is avoided the route obstruction of certain mobile sink node and exhausting fast of energy.In addition, sensor node and mobile sink node do not need mutually to monitor communications status separately again, have reduced the disorderly competition between the sensor node, save the energy of sensor node, and reduce the time-delay of data retransmission.
Preferably, in the described step 114, the data retransmission control device also further carries out time slot allocation to above-mentioned pairing result, and time slot allocation result and pairing result are broadcast to described sensor node and mobile sink node.Because the data retransmission control device carries out centralized control, and with the pairing result of sensing node and mobile sink node, and the result that the pairing result is carried out time slot allocation is broadcast to mobile sink node and sensing node, do not need mutually to monitor again communications status separately between sensor node and the mobile sink node, disorderly competition and conflict between the sensor node have been reduced, save the energy of sensor node, and reduce the time-delay of data retransmission.
As shown in Figure 4, by Competitive Algorithms processing specifically of two-dimensional matrix be may further comprise the steps:
Whether step 404 judges these nonzero values at identical row, if so, and execution in step 406 or 408; If not, execution in step 410;
Step 420, for the matrix II, shown in Fig. 6 c, each row is selected a nonzero value in different row, makes sum total maximum, all the other zero setting;
Step 426 judges whether that every row only has a nonzero value, if so, then finishes; If not, repeat above-mentioned steps 414, until every row only has at most a nonzero value in the two-dimensional matrix.
In the present embodiment, by above-mentioned simple matrix disposal, make whenever being about in the matrix only have at most a nonzero value, mean that namely each sensor node has been assigned a mobile sink node as much as possible, make its data retransmission pair relationhip of one of partnering; And each mobile sink node also only is a sensor node forwarding data, so that the mobile sink node load balancing is avoided the route obstruction of certain mobile sink node and exhausting fast of energy.
Device embodiment
Fig. 7 is data retransmission control device example structure figure of the present invention, and as shown in Figure 7, the present embodiment comprises:
Preferably, the present embodiment data retransmission control device also comprises time slot allocation module 708, is used for the pairing result of described sensor node and mobile sink node is carried out time slot allocation.
The data retransmission control device of the present embodiment, by generating two-dimensional matrix according to integrated information, and matrix processed, so that whenever being about in the matrix only has at most a nonzero value, mean that namely each sensor node has been assigned a mobile sink node as much as possible, make its data retransmission pair relationhip of one of partnering; And each mobile sink node also only is a sensor node forwarding data.So that the mobile sink node load balancing is avoided the route obstruction of certain mobile sink node and exhausting fast of energy.In addition, sensor node and mobile sink node do not need mutually to monitor communications status separately again, have reduced the disorderly competition between the sensor node, save the energy of sensor node, and reduce the time-delay of data retransmission.
System embodiment
Fig. 8 is data forwarding system example structure figure of the present invention, and as shown in Figure 8, the present embodiment comprises:
Sensor node 82 is used for sending solicited message to mobile sink node when having data to transmit, wherein, solicited message comprises: the desired qos parameter of the ID of sensor node 82 and data retransmission thereof;
Mobile sink node 84, be used for when receiving described request information, judge whether to be described sensor node forwarding data according to channel conditions, and the integrated information that generates for the forwarding data ability of each sensor node is sent to described data retransmission control device;
Data retransmission control device 86, be used for according to the two-dimensional matrix of the described integrated information generation that receives about mobile sink node and sensor node,, and according to the result to described two-dimensional matrix described sensor node and mobile sink node are matched to the processing of described two-dimensional matrix by Competitive Algorithms.
The generation two-dimensional matrix of data retransmission control device 86 and the concrete operations that this matrix is processed specifically describe in said method embodiment, do not repeat them here.
Preferably data retransmission control device 86 also carries out time slot allocation to the pairing result, and time slot allocation result and pairing result are broadcast to sensor node and mobile sink node.Wherein, the data retransmission control device can or be arranged in the base station for independent network element.
The data forwarding system of the present embodiment, by mobile sink node and the sensing node that needs data retransmission are carried out one to one data retransmission pairing, so that the mobile sink node load balancing is avoided the route obstruction of certain mobile sink node and exhausting fast of energy.Simultaneously, sensor node and mobile sink node do not need mutually to monitor communications status separately again, have reduced the disorderly competition between the sensor node, save the energy of sensor node, and reduce the time-delay of data retransmission.
It should be noted that: above embodiment is only unrestricted in order to the present invention to be described, the present invention also is not limited in above-mentioned giving an example, and all do not break away from technical scheme and the improvement thereof of the spirit and scope of the present invention, and it all should be encompassed in the claim scope of the present invention.
Claims (10)
1. a data forwarding controlling method is characterized in that, comprising:
The integrated information for the forwarding data ability of each sensor node that receives that each mobile sink point sends, and generate two-dimensional matrix about mobile sink node and sensor node according to described integrated information;
To the processing of described two-dimensional matrix, so that every delegation only has at most a nonzero value in the described two-dimensional matrix, namely to only have at most a mobile sink node be its forwarding data to each sensor node by Competitive Algorithms;
According to the result to described two-dimensional matrix described sensor node and mobile sink node are matched;
Describedly comprise by the operation of processing of Competitive Algorithms to described two-dimensional matrix:
Search and only have to be the row of nonzero value, and judge that whether these nonzero values are at identical row; If at identical row, select delegation to keep its nonzero value or reservation has peaked row, the corresponding column position zero setting of remaining row then at random from these row; If these nonzero values are distributed in different row, then each row keeps its nonzero value separately;
Judge whether each row only has at most a nonzero value in described each row two-dimensional matrix, if so, process ends; If not, then searching has two to be the row of nonzero value, judges whether these nonzero values are in identical row; If at identical row, then each row is selected a nonzero value in different row, or each row selects a nonzero value in different row, makes summation maximum, all the other zero setting; If at different row, then each row is selected a nonzero value in different row, and perhaps each row keeps its maximum, all the other zero setting;
Judge whether each row only has at most a nonzero value in described each row two-dimensional matrix, if so, process ends; If not, search successively in the manner described above and be the row of nonzero value more than three and three, and corresponding the processing, until every row only has at most a nonzero value in the described two-dimensional matrix.
2. data forwarding controlling method according to claim 1 is characterized in that, described integrated information comprises: whether described mobile sink node can be described sensor node forwarding data;
In the described two-dimensional matrix, the described mobile sink node of " 1 " expression can be the forwarding data of the sensor node of correspondence; The corresponding mobile sink node of " 0 " expression can not be the sensor node forwarding data of correspondence.
3. data forwarding controlling method according to claim 1, it is characterized in that, described integrated information comprises: described sensor node is to the precedence information of link quality information, the power status information of described mobile sink node itself, the desired delayed data of described sensor node and/or the required forwarding information of described mobile sink node;
In the described two-dimensional matrix, the corresponding mobile sink node of " 0 " expression can not be the sensor node forwarding data of correspondence; Nonzero value represents that corresponding mobile sink node is the quantized value of the ability of corresponding sensor node forwarding data.
4. data forwarding controlling method according to claim 3 is characterized in that,
When described nonzero value represented that described sensor node arrives the link-quality of described mobile sink node, described nonzero value was the highest achievable rate expression formula of utilizing shannon formula to calculate.
5. a data retransmission control device is characterized in that, comprising:
The matrix generation module is used for the integrated information for the forwarding data ability of each sensor node that sends according to each mobile sink point that receives, and generation is about the two-dimensional matrix of mobile sink node and sensor node;
The matrix disposal module is used for searching to only have to be the row of nonzero value, and judges that whether these nonzero values are at identical row; If at identical row, select delegation to keep its nonzero value or reservation has peaked row, the corresponding column position zero setting of remaining row then at random from these row; If these nonzero values are distributed in different row, then each row keeps its nonzero value separately; Judge whether each row only has at most a nonzero value in described each row two-dimensional matrix, if so, process ends; If not, then searching has two to be the row of nonzero value, judges whether these nonzero values are in identical row; If at identical row, then each row is selected a nonzero value in different row, or each row selects a nonzero value in different row, makes summation maximum, all the other zero setting; If at different row, then each row is selected a nonzero value in different row, and perhaps each row keeps its maximum, all the other zero setting; Judge whether each row only has at most a nonzero value in described each row two-dimensional matrix, if so, process ends; If not, search successively in the manner described above and be the row of nonzero value more than three and three, and corresponding the processing, until every row only has at most a nonzero value in the described two-dimensional matrix;
Matching module is used for according to the result of described two-dimensional matrix is matched to described sensor node and mobile sink node.
6. data retransmission control device according to claim 5 is characterized in that, also comprises the time slot allocation module, is used for described sensor node and mobile sink node are carried out time slot allocation.
7. a data forwarding system is characterized in that, comprising:
Sensor node is used for sending solicited message to mobile sink node when having data to transmit;
Mobile sink node, be used for when receiving described request information, judge whether to be described sensor node forwarding data according to channel conditions, and the integrated information that generates for the forwarding data ability of each sensor node is sent to described data retransmission control device;
The data retransmission control device, be used for according to the two-dimensional matrix of the described integrated information generation that receives about mobile sink node and sensor node,, and according to the result to described two-dimensional matrix described sensor node and mobile sink node are matched to the processing of described two-dimensional matrix by Competitive Algorithms; Describedly comprise by the operation of processing of Competitive Algorithms to described two-dimensional matrix: search and only have to be the row of nonzero value, and judge that whether these nonzero values are at identical row; If at identical row, select delegation to keep its nonzero value or reservation has peaked row, the corresponding column position zero setting of remaining row then at random from these row; If these nonzero values are distributed in different row, then each row keeps its nonzero value separately; Judge whether each row only has at most a nonzero value in described each row two-dimensional matrix, if so, process ends; If not, then searching has two to be the row of nonzero value, judges whether these nonzero values are in identical row; If at identical row, then each row is selected a nonzero value in different row, or each row selects a nonzero value in different row, makes summation maximum, all the other zero setting; If at different row, then each row is selected a nonzero value in different row, and perhaps each row keeps its maximum, all the other zero setting; Judge whether each row only has at most a nonzero value in described each row two-dimensional matrix, if so, process ends; If not, search successively in the manner described above and be the row of nonzero value more than three and three, and corresponding the processing, until every row only has at most a nonzero value in the described two-dimensional matrix.
8. data forwarding system according to claim 7 is characterized in that, described request information comprises: the desired qos parameter of the ID of described sensor node and data retransmission thereof.
9. data forwarding system according to claim 7 is characterized in that, described data retransmission control device also carries out time slot allocation to the pairing result, and time slot allocation result and pairing result are broadcast to described sensor node and mobile sink node.
10. data forwarding system according to claim 7 is characterized in that, described data retransmission control device is independent network element or is arranged in the base station.
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