CN103648141A - Communication method of wireless sensor network and sensor node - Google Patents

Communication method of wireless sensor network and sensor node Download PDF

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CN103648141A
CN103648141A CN201310632453.1A CN201310632453A CN103648141A CN 103648141 A CN103648141 A CN 103648141A CN 201310632453 A CN201310632453 A CN 201310632453A CN 103648141 A CN103648141 A CN 103648141A
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sensor node
sensor
candidate
node
source
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CN201310632453.1A
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赵惟
赵亮
张文瀛
徐勇军
刁博宇
李海英
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中国电子器材总公司
中国科学院计算技术研究所
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02DCLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THIR OWN ENERGY USE
    • Y02D70/00Techniques for reducing energy consumption in wireless communication networks

Abstract

The embodiment of the invention provides a communication method of a wireless sensor network and a sensor node. The method comprises the following steps: a source sensor node acquires coordinates and residual energy of at least one first candidate sensor node; the source sensor node screens the at least one first candidate sensor node according to the coordinates, the residual energy and a preset parabola to obtain a target sensor node; and the source sensor node sends a data packet to the target sensor node. According to the technical scheme provided by the embodiment of the invention, the energy consumption of the sensor node is reduced and the working time of the wireless sensor network is prolonged.

Description

一种无线传感器网络的通信方法及传感器节点 Communication method, and a sensor node of wireless sensor networks

【技术领域】 TECHNICAL FIELD

[0001] 本发明涉及信息技术领域,尤其涉及一种无线传感器网络的通信方法及传感器节点。 [0001] The present invention relates to information technologies, and in particular relates to a communication method and a sensor node of wireless sensor networks.

【背景技术】 【Background technique】

[0002] 无线传感器网络由部署在监测区域内大量的廉价微型的传感器节点组成,传感器节点通过无线通信方式形成的一个多跳的自组织的网络,其中,每个传感器节点都连接有传感器,这些传感器之间协作地检测、采集和处理网络覆盖区域中目标的信息,并发送给所连接的传感器节点。 [0002] The wireless sensor network deployed in a large number of cheap micro sensor nodes in the monitoring area composed of a network of self-organizing multi-hop sensor nodes formed by the radio communication system, wherein each sensor node is connected a sensor, which detecting cooperation between a sensor, the target area information acquisition and processing of network coverage, sends the sensor node is connected.

[0003] 无线传感器网络是与应用相关的网络,不同的应用背场景对无线传感器网络的要求不同,使得无线传感器网络的硬件平台、软件系统和通信协议必然会有很大差异,与具有统一的通信协议平台的因特网不同。 [0003] The wireless sensor network is a network-related application, different application scenarios back in claim wireless sensor networks, wireless sensor networks so that the hardware platform, system software, communication protocols and there must be very different, having uniform internet communication protocol different platforms. 经过十几年的发展,无线传感器网络已经有非常多的实际应用,如无线传感器网络的目标跟踪是指无线传感器网络的多个或全部传感器节点之间协作跟踪同一目标,传感器节点之间交换获得的数据,以确定目标的位置和运动轨迹,预测目标的运动方向,并通过一定的唤醒机制使得目标运动方向上的传感器节点能够及时加入跟踪过程。 After ten years of development, wireless sensor networks have a lot of practical applications, such as wireless sensor networks target tracking means to track the same target collaboration between multiple or all of the sensor nodes for wireless sensor networks, the exchange between the sensor nodes to obtain data, to determine a target position trajectory and predicted motion direction of the target, and through a certain mechanism such that the sensor node wake-up in the direction of object motion tracking process can be added in a timely manner. 目标的跟踪在军事、环境控制中有着广泛的应用,如对低空飞行物的定位和跟踪、对水下无人舰船的定位和跟踪等。 Tracking has a wide range of applications, such as low altitude flying objects to locate and track targets in the military, environmental control, underwater unmanned ship positioning and tracking.

[0004] 然而,目标的跟踪和定位场景中,无线传感器网络中传感器节点的部署是三维立体的,且传感器节点的数量庞大,因此,传感器节点之间的信道重叠率比较高,传感器节点收到的冗余信息的概率比较大,使得传感器节点容易消耗掉大量的额外能量。 [0004] However, locating and tracking the target in a scene, wireless sensor networks deploy sensor nodes is three-dimensional, and a large number of sensor nodes, and therefore, channel overlap between the sensor nodes is relatively high, the sensor node receives probability redundant information is relatively large, such that the sensor nodes easily consume a large amount of additional energy.

【发明内容】 [SUMMARY]

[0005] 有鉴于此,本发明实施例提供了一种无线传感器网络的通信方法及传感器节点,以实现降低传感器节点的能耗,延长无线传感器网络的工作时间。 [0005] In view of this, embodiments provide a communication method and a sensor node for a wireless sensor network of the present invention, in order to achieve a reduction in energy consumption of sensor nodes, to extend the working time of the wireless sensor networks.

[0006] 本发明实施例提供了一种无线传感器网络的通信方法,包括: [0006] The embodiment provides a communication method of the present invention, a wireless sensor network, comprising:

[0007] 源传感器节点获得至少一个第一候选传感器节点的坐标和剩余能量; [0007] The sensor node receives a source coordinate and the residual energy of at least a first sensor node of the candidate;

[0008] 所述源传感器节点依据所述坐标、所述剩余能量和预设的抛物线,对所述至少一个第一候选传感器节点进行筛选,以获得目标传感器节点; [0008] The source node according to the coordinate sensor, and the remaining energy of a predetermined parabola, the at least one first screening candidate sensor node, the sensor node to obtain a target;

[0009] 所述源传感器节点向所述目标传感器节点发送数据包。 [0009] The sensor source node sends a packet to the target sensor node.

[0010] 上述方法中,所述源传感器节点获得至少一个第一候选传感器节点的坐标和剩余能量,包括: [0010] The above-described method, the source node obtains the coordinates of the sensor and the residual energy of at least a first candidate sensor node, comprising:

[0011] 所述源传感器节点向所述至少一个第一候选传感器节点发送握手信息包,所述握手信息包中包含所述源传感器节点的坐标,以便于所述至少一个第一候选传感器节点中每个所述第一候选传感器节点向所述源传感器节点发送位置信息包,所述位置信息包中包含所述第一候选传感器节点的坐标和剩余能量。 [0011] The sensor source node transmits the handshake packet to the at least one first candidate sensor node, the handshake packet contains the coordinate information of the source node of the sensor, so that the at least one sensor node in the first candidate each of the first candidate sensor node to sensor node transmits a location information of the source packet, the packet includes position information and the coordinates of the remaining energy of the first sensor node candidate.

[0012] 上述方法中,所述源传感器节点依据所述坐标、所述剩余能量和预设的抛物线,对所述至少一个第一候选传感器节点进行筛选,以获得目标传感器节点,包括: [0012] In the above-described method, the source node according to the coordinate sensor, and the remaining energy of a predetermined parabola, the at least one first screening candidate sensor node, the sensor node to obtain a target, comprising:

[0013] 所述源传感器节点依据所述坐标和所述抛物线,对所述至少一个第一候选传感器节点进行筛选,以获得至少一个第二候选传感器节点; [0013] The sensor node according to the source and the parabolic coordinates, a first of the at least one sensor node candidate screening, candidate to obtain at least a second sensor node;

[0014] 所述源传感器节点依据所述坐标和所述剩余能量,获得每个所述第二候选传感器节点的通信权值; [0014] The source node according to the coordinate sensor and the remaining energy, weight for each communication to obtain the second candidate sensor node;

[0015] 所述源传感器节点依据所述通信权值最高的第二候选传感器节点,获得目标传感器节点。 [0015] According to the communication node of the source sensor weights the second highest candidate sensor node, the sensor node to obtain a target.

[0016] 上述方法中,所述源传感器节点依据所述坐标和所述抛物线,对所述至少一个第一候选传感器节点进行筛选,以获得至少一个第二候选传感器节点,包括: [0016] The above-described method, the source node according to the coordinate sensor and the parabola, the at least one first sensor node candidate screening, candidate to obtain at least a second sensor node, comprising:

[0017] 所述源传感器节点依据所述坐标和所述抛物线的公式,获得满足所述抛物线的公式的至少一个坐标;所述抛物线的公式为: [0017] The sensor source node according to the formula and the coordinates of the parabola equation of the parabola is obtained satisfies at least one coordinate; parabola of the formula:

[0018] (X-X1) 2-4a (Y-Y1) < O [0018] (X-X1) 2-4a (Y-Y1) <O

[0019] 其中,(X,Y)为所述第二候选传感器节点的坐标,(X1J1)为所述源传感器节点的坐标,a为所述抛物线的焦点的纵坐标; [0019] where, (X, Y) of the second candidate coordinate sensor node, (X1J1) for the source node coordinate sensor, a is the focus of the parabola of ordinate;

[0020] 所述源传感器节点依据所述满足所述抛物线的公式的至少一个坐标中,每个所述坐标对应的第一候选传感器节点,获得所述至少一个第二候选传感器节点。 At least one coordinate [0020] The sensor node according to the source of the parabola satisfies the formula, each of said sensor corresponding to the coordinates of the first candidate node, obtaining the at least a second sensor node candidate.

[0021] 上述方法中,所述源传感器节点依据所述坐标和所述剩余能量,获得每个所述第二候选传感器节点的通信权值,包括: [0021] The above-described method, the source node according to the coordinate sensor and the remaining energy, weight for each communication to obtain the second candidate sensor node, comprising:

[0022] 所述源传感器节点依据所述坐标和距离公式,获得每个所述第二候选传感器节点与所述源传感器节点之间的投影距离;所述距离公式为: [0022] The sensor node according to the source coordinates and distance formula to obtain the projection distance between each of the second sensor node candidate node with the source sensor; is the distance formula:

[0023] [0023]

Figure CN103648141AD00051

[0024] 其中,(X,Y)为所述第二候选传感器节点的坐标,(X1J1)为所述源传感器节点的坐标,d为所述投影距离; [0024] where, (X, Y) of the second candidate coordinate sensor node, (X1J1) coordinates of the source of sensor nodes, d is the projection distance;

[0025] 所述源传感器节点依据所述剩余能量与所述投影距离的商,获得每个所述第二候选传感器节点的通信权值。 [0025] The sensor source node according to the residual energy supplier and the projection distance, the communication to obtain the second candidate value for each weight sensor node.

[0026] 一种传感器节点,所述传感器节点为源传感器节点,包括: [0026] A sensor node, the sensor node is a source node sensor, comprising:

[0027] 第一处理单元,用于获得至少一个第一候选传感器节点的坐标和剩余能量; [0027] The first processing unit, for obtaining the coordinates and the residual energy of the at least one sensor node of the first candidate;

[0028] 第二处理单元,用于依据所述坐标、所述剩余能量和预设的抛物线,对所述至少一个第一候选传感器节点进行筛选,以获得目标传感器节点; [0028] The second processing unit, according to the coordinates, and the residual energy of a predetermined parabola, the at least one first screening candidate sensor node, the sensor node to obtain a target;

[0029] 发送单元,用于向所述目标传感器节点发送数据包。 [0029] The transmitting means for transmitting the sensor data packet to the target node.

[0030] 上述传感器节点中,所述第一处理单元,具体用于: [0030] The sensor node, the first processing unit, configured to:

[0031] 向所述至少一个第一候选传感器节点发送握手信息包,所述握手信息包中包含所述源传感器节点的坐标,以便于所述至少一个第一候选传感器节点中每个所述第一候选传感器节点向所述源传感器节点发送位置信息包,所述位置信息包中包含所述第一候选传感器节点的坐标和剩余能量。 [0031] at least a first candidate sensor node transmits a packet to the handshake, the handshake packet contains the coordinate information of the source node of the sensor, so that the at least one first candidate in each of the first sensor node a candidate position sensor node transmits the source sensor node packet, the packet includes position information and the coordinates of the remaining energy of the first sensor node candidate.

[0032] 上述传感器节点中,所述第二处理单元,具体用于: [0032] The sensor node, the second processing unit, configured to:

[0033] 依据所述坐标和所述抛物线,对所述至少一个第一候选传感器节点进行筛选,以获得至少一个第二候选传感器节点;[0034] 依据所述坐标和所述剩余能量,获得每个所述第二候选传感器节点的通信权值; [0033] and according to the coordinates of the parabola, the at least one first sensor node candidate screening, candidate to obtain at least a second sensor node; [0034] and according to the coordinates of the remaining energy to obtain each second communication of said candidate sensor node weight values;

[0035] 依据所述通信权值最高的第二候选传感器节点,获得目标传感器节点。 [0035] The maximum value of the communication based on the weight of the second candidate sensor node, the sensor node to obtain a target.

[0036] 上述传感器节点中,所述第二处理单元,具体用于: [0036] The sensor node, the second processing unit, configured to:

[0037] 依据所述坐标和所述抛物线的公式,获得满足所述抛物线的公式的至少一个坐标;所述抛物线的公式为: [0037] and according to the coordinates of the parabola equation, a parabolic equation satisfied at least one coordinate; parabola of the formula:

[0038] (X-X1) 2-4a (Y-Y1) < O [0038] (X-X1) 2-4a (Y-Y1) <O

[0039] 其中,(X,Y)为所述第二候选传感器节点的坐标,(X1J1)为所述源传感器节点的坐标,a为所述抛物线的焦点的纵坐标; [0039] where, (X, Y) of the second candidate coordinate sensor node, (X1J1) for the source node coordinate sensor, a is the focus of the parabola of ordinate;

[0040] 依据所述满足所述抛物线的公式的至少一个坐标中,每个所述坐标对应的第一候选传感器节点,获得所述至少一个第二候选传感器节点。 [0040] based on at least one of the coordinates of the parabola satisfies the formula, each of said sensor corresponding to the coordinates of the first candidate node, obtaining the at least a second sensor node candidate.

[0041] 上述传感器节点中,所述第二处理单元,具体用于: [0041] The sensor node, the second processing unit, configured to:

[0042] 依据所述坐标和距离公式,获得每个所述第二候选传感器节点与所述源传感器节点之间的投影距离;所述距离公式为: [0042] According to the coordinates and distance formula to obtain the projection distance between each of the second sensor node candidate node with the source sensor; is the distance formula:

[0043] d = ^J(X-Xi)2 +(YY) [0043] d = ^ J (X-Xi) 2 + (YY)

[0044] 其中,(X,Y)为所述第二候选传感器节点的坐标,(X1J1)为所述源传感器节点的坐标,d为所述投影距离; [0044] where, (X, Y) of the second candidate coordinate sensor node, (X1J1) coordinates of the source of sensor nodes, d is the projection distance;

[0045] 依据所述剩余能量与`所述投影距离的商,获得每个所述第二候选传感器节点的通信权值。 [0045] The residual energy supplier based on the projection distance `acquiring communication weight of each sensor node of the second candidate.

[0046] 由以上技术方案可以看出,本发明实施例具有以下有益效果: [0046] As can be seen from the above technical solutions, the embodiments of the present invention has the following advantages:

[0047] 本发明实施例提供的技术方案,在引入少量的通信开销的情况下,利用抛物线在三维无线传感器网络中确定下一跳节点的范围,降低了源传感器节点确定下一跳节点的计算量,大大降低了整个三维无线传感器网络的通信能耗,延长三维无线传感器网络的工作时间。 [0047] The technical solution provided by the embodiment of the present invention, in the case of introducing a small amount of communication overhead, the range is determined using a parabolic next hop node in a three-dimensional wireless sensor network, the sensor reducing the source node determines the next hop node calculated amount, significantly reducing the energy consumption of the entire three-dimensional communication in wireless sensor networks, wireless sensor networks to extend the three-dimensional working time.

【附图说明】 BRIEF DESCRIPTION

[0048] 为了更清楚地说明本发明实施例的技术方案,下面将对实施例中所需要使用的附图作简单地介绍,显而易见地,下面描述中的附图仅仅是本发明的一些实施例,对于本领域普通技术人员来讲,在不付出创造性劳动性的前提下,还可以根据这些附图获得其它的附图。 [0048] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings are briefly introduced as required for use in the embodiments describing the embodiments. Apparently, the accompanying drawings in the following description are only some embodiments of the present invention. , those of ordinary skill in the art is concerned, without any creative effort, and may also obtain other drawings based on these drawings.

[0049] 图1是本发明实施例所提供的无线传感器网络的通信方法的流程示意图; [0049] FIG. 1 is a schematic flow chart of a communication method of a wireless sensor network according to an embodiment of the present invention;

[0050] 图2是本发明实施例所提供的握手信息包的示意图; [0050] FIG. 2 is a schematic diagram of the embodiment of the handshake packet to an embodiment of the present invention;

[0051] 图3是本发明实施例所提供的位置信息包的示意图; [0051] FIG. 3 is a schematic view of the position information provided by the embodiment of the embodiment of the present invention;

[0052] 图4是本发明实施例所提供的传感器节点的功能方块图; [0052] FIG. 4 is a functional block diagram of a sensor node according to an embodiment of the present invention;

[0053]图5是本发明实施例所提供的传感器节点的结构示意图。 [0053] FIG. 5 is a schematic structural diagram of a sensor node according to an embodiment of the present invention.

【具体实施方式】 【Detailed ways】

[0054] 为了更好的理解本发明的技术方案,下面结合附图对本发明实施例进行详细描述。 [0054] In order to better understand the technical solutions of the present invention, the following detailed description of the embodiments of the drawings in conjunction with the present invention. [0055] 应当明确,所描述的实施例仅仅是本发明一部分实施例,而不是全部的实施例。 [0055] It should be clear that the described embodiments are merely part of embodiments of the present invention rather than all embodiments. 基于本发明中的实施例,本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其它实施例,都属于本发明保护的范围。 Based on the embodiments of the present invention, those of ordinary skill in the art without making all of the other embodiments given herein without creative efforts fall within the scope of the present invention.

[0056] 本发明实施例给出一种无线传感器网络的通信方法,请参考图1,其为本发明实施例所提供的无线传感器网络的通信方法的流程示意图,如图所示,该方法包括以下步骤: [0056] Example embodiments of the present invention are given communication method for a wireless sensor network, please refer to FIG. 1, a schematic flowchart of a communication method of the present invention is a wireless sensor network according to the embodiment is provided, as shown, the method comprising the following steps:

[0057] 步骤101,源传感器节点获得至少一个第一候选传感器节点的坐标和剩余能量。 [0057] Step 101, the source node obtains the coordinates of the sensor and the residual energy of at least a first sensor node candidate.

[0058] 具体的,本发明实施例可以在10T-N0DE2530通用物联网节点上实现,采用CC2530通信模块,所有传感器节点之间可以进行无线通信,其中一个传感器节点为网关,该网关通过以太网与计算机连接。 [0058] Specifically, embodiments of the present invention may be implemented on a general-purpose 10T-N0DE2530 things nodes using CC2530 communication module, the wireless communication may be performed between all the sensor nodes, wherein the sensor node is a gateway, the gateway via Ethernet computer connection.

[0059] 预先在三维无线传感器网络中配置若干信标节点,如4至5个信标节点,传感器节点上电后,加入到网关,以组成三维无线传感器网络;然后,预先配置的每个信标节点都在三维无线传感器网络中以广播方式,向传感器节点发送信标节点的坐标,传感器节点接收到若干个信标节点的坐标后,依据这些坐标,利用RSSI和欧几里得距离公式,计算传感器节点的坐标,该坐标指的是传感器节点相对于信标节点的坐标;待所有传感器节点都计算获得自身的坐标后,三维无线传感器网络组网完毕,三维无线传感器网络中传感器节点之间可以正常通信。 [0059] In a three-dimensional pre-configured wireless sensor networks several beacons, such as 4-5 beacons, sensor node is powered on, is added to the gateway, to form a three-dimensional wireless sensor network; then, each channel preconfigured after the three-dimensional landmark nodes in a wireless sensor network in a broadcast manner, the coordinates of the transmitting beacons sensor node, the sensor node receives a plurality of coordinates of the beacon nodes based on these coordinates, and using the Euclidean distance formula RSSI, calculating the coordinates of the sensor node, the sensor node coordinates refer to the coordinates relative to beacons; after all the sensor nodes are calculated to obtain their coordinates, a three-dimensional wireless sensor networking is completed between the three-dimensional sensor node in wireless sensor networks It can communicate properly.

[0060] 为了方便说明,本发明实施例中,三维无线传感器网络中包含一个源传感器节点和至少一个第一候选传感器节点,源传感器节点需要发出数据包,该数据包需要达到目的传感器节点,但是由于源传感器节点的通信半径有限,源传感器节点无法直接发送数据包给目的传感器节点,因此,该数据包需要经过至少一个传感器节点的转发,最终才能达到目的传感器节点,因此,源传感器节点需要先利用本发明实施例提供的方法确定下一跳的传感器节点,即目标传感器节点,然后将数据包发送给该目标传感器节点,再由目标传感器节点利用同样的方法确定下一跳的传感器节点,向下一跳的传感器节点发送数据包,以此类推,最终该数据包会达到目的传感器节点。 [0060] For convenience of description, embodiments of the present invention, a three-dimensional wireless sensor networks comprises a source node and at least one sensor a first sensor candidate node, the source node needs to send the sensor data packet, the packet needs to achieve the purpose of the sensor nodes, due to the limited communication range of the source sensor node, the source node can not directly send the sensor data packet to the sensor node object, therefore, need to go through the packet forwarding node, the at least one sensor, in order to achieve the ultimate purpose of the sensor nodes, thus the source node needs to sensor With the present embodiment of the invention provides a method of determining the next hop node of the sensor, i.e. a sensor target node, and then sends the packet to the target sensor node, the sensor node then determined by the target sensor node next hop by the same method, the next hop sensor nodes send packets, and so on, the packet will ultimately achieve the purpose of the sensor node.

[0061] 所述源传感器节点依据预设的通信半径,向通信半径内至少一个第一候选传感器节点发送握手信息包;请参考图2,其为本发明实施例所提供的握手信息包的示意图,如图所示,所述握手信息包中包含所述源传感器节点的坐标和所述源传感器节点的唯一标识符。 Please refer to FIG. 2, the handshake packet provided by the embodiment of the present embodiment of the invention; [0061] The sensor source communication node according to a predetermined radius, at least a first candidate to the transmitting sensor node within a communications radius of the handshake packet , as shown, the handshake packet contains a unique identifier of the source coordinate sensor node and the source node of the sensor. 其中,源传感器节点可以利用广播方式向至少一个第一候选传感器节点发送握手信息包,这样,通信半径内的第一候选传感器节点都会收到源传感器节点发送的握手信息包。 Wherein, the source node can use a broadcast sensor send handshake packet to the at least one first candidate sensor node such that the first candidate sensor node in a communication radius will receive handshake packet transmitted by the source sensor node. 本发明实施例中,可以通过调整源传感器节点的发射功率来控制源传感器节点的通信半径。 Embodiment, the communication can be controlled by the radius of the source sensor nodes transmit power adjustment source sensor node embodiment of the present invention.

[0062] 源传感器节点的通信半径范围内的至少一个第一候选传感器节点中,每个所述第一候选传感器节点在接收到所述源传感器节点发送的握手信息包后,向所述源传感器节点发送一个位置信息包;请参考图3,其为本发明实施例所提供的位置信息包的示意图,如图所示,所述位置信息包中包含所述第一候选传感器节点的坐标、第一候选传感器节点当前的剩余能量和第一候选传感器节点的唯一标识符。 [0062] at least a first candidate sensor node within the communication range of the radius of the source of sensor nodes, each sensor node in the first candidate after receiving the handshake packet sent by the source sensor node to the source sensor node sends a packet location information; Please refer to FIG. 3, a schematic diagram of the present invention according to the position information packet provided by the embodiment, as shown, the position coordinates of the information packet includes a first sensor node of the candidate, first unique identifier for the current first candidate and the residual energy of the sensor node a candidate sensor node. 其中,第一候选传感器节点当前的剩余能量指的是第一候选传感器节点当前的电能,这里,由于三维无线传感器网络中的传感器节点都是无源的,因此,第一候选传感器节点的剩余能量是衡量第一候选传感器节点能否作为源传感器节点的下一跳节点的重要指标。 Wherein the first sensor node of the current candidate residual energy refers to the current first candidate power sensor node, here, since the three-dimensional sensor node of wireless sensor network is passive, and therefore, the residual energy of the first sensor node candidate the first candidate is a measure of whether the sensor node as the source of an important indicator of a next hop node of the sensor node.

[0063] 步骤102,所述源传感器节点依据所述坐标、所述剩余能量和预设的抛物线,对所述至少一个第一候选传感器节点进行筛选,以获得目标传感器节点。 [0063] Step 102, the source node according to the coordinate sensor, and the remaining energy of a predetermined parabola, the at least one first screening candidate sensor node, the sensor node to obtain a target.

[0064] 具体的,首先,所述源传感器节点在收到至少一个第一候选传感器节点发送的位置信息包之后,所述源传感器节点依据第一候选传感器节点的坐标和预设的抛物线,对所述至少一个第一候选传感器节点进行筛选,以获得至少一个第二候选传感器节点;其中,至少一个第一候选传感器节点包含至少一个第二候选传感器节点。 [0064] Specifically, first, the source node after receiving the sensor information includes at least one first position sensor node transmitted candidate, the candidate sensor according to the first source node and the sensor node coordinates a predetermined parabola, for at least a first sensor node candidate screening, candidate to obtain at least a second sensor node; wherein the at least one sensor node comprises at least a first candidate for a second candidate sensor node.

[0065] 例如,所述源传感器节点依据所述坐标和所述抛物线,对所述至少一个第一候选传感器节点进行筛选的方法可以包括: [0065] For example, the sensor node according to the source and the parabolic coordinates, a method for at least a first sensor node candidate screening may include:

[0066] 由于是三维无线传感器网络,因此源传感器节点收到的位置信息包中的坐标其实是三维坐标,即坐标中包含X轴的坐标、Y轴的坐标和Z轴的坐标,所述源传感器节点依据所述坐标中的X轴的坐标和Y轴的坐标、所述抛物线的公式,获得满足所述抛物线的公式的至少一个坐标;所述抛物线的公式可以为: [0066] Since the wireless sensor network is a three-dimensional, so the coordinate position information of the packet in the source node receives the sensor is actually three-dimensional coordinates, i.e., X-axis coordinate of the coordinates included, coordinates, and the Z-axis and Y-axis, the source sensor node according to the coordinates X-axis and Y-axis of coordinates, the equation of the parabola, the parabola equation satisfied at least one coordinate; parabola of the formula may be:

[0067] (X-X1) 2-4a (Y-Y1) < O [0067] (X-X1) 2-4a (Y-Y1) <O

[0068] 其中,(X,Y)为所述第二候选传感器节点的X轴的坐标和Y轴的坐标,(X1, Y1)为所述源传感器节点的X轴的坐标和Y轴的坐标,a为所述抛物线的焦点的纵坐标。 Coordinates [0068] where, (X, Y) coordinates for the X-axis and Y-axis sensor of the second candidate node, (X1, Y1) of the X-axis of the source sensor node coordinates and the Y axis , a is the focus of the parabola ordinate.

[0069] 所述源传感器节点依据所述满足所述抛物线的公式的至少一个坐标中,每个所述坐标对应的第一候选传感器节点,获得所述至少一个第二候选传感器节点,即将满足所述抛物线的公式的坐标所对应的第一候选传感器节点作为第二候选传感器节点。 At least one coordinate [0069] The sensor node according to the source of the parabola satisfies the formula, each of said sensor corresponding to the coordinates of the first candidate node, obtaining the at least a second candidate sensor node, i.e. to meet the said parabolic coordinates corresponding to the formula a first sensor node as a candidate for the second candidate sensor node.

[0070] 这里,利用抛物线的公式对至少一个第一候选传感器节点进行筛选,将位于抛物线之外的第一候选传感器节点舍弃,仅保留抛物线之内的第一候选传感器节点;基于抛物线对第一候选传感器节点进行筛`选,可以提高源传感器节点的路由选择效率,进而可以降低源传感器节点的能耗,从而可以延长三维无线传感器网络的工作时间。 [0070] Here, using the parabolic equation at least a first sensor node screening candidate, the candidate of the first sensor is located outside the parabolic node discarded, retaining only the first candidate sensor node within the parabola; based on the first parabolic `screening candidate selected sensor node, the routing efficiency of the source can be improved sensor nodes, and thus can reduce the energy consumption of sensor nodes in the source, which can extend the working time of three wireless sensor networks. 其中,抛物线的公式可以依据目的传感器节点的位置确定。 Wherein the parabolic equation can be determined based on the position sensor node object.

[0071] 然后,所述源传感器节点依据所述坐标和所述剩余能量,获得每个所述第二候选传感器节点的通信权值。 [0071] Then, the source node according to the coordinate sensor and the remaining energy, weight for each communication to obtain the second candidate sensor node.

[0072] 例如,所述源传感器节点依据所述坐标和所述剩余能量,获得每个所述第二候选传感器节点的通信权值的方法可以包括: Method [0072] For example, the source node according to the coordinate sensor and the remaining energy, weight for each communication to obtain the second candidate sensor node may include:

[0073] 所述源传感器节点依据所述坐标和距离公式,获得每个所述第二候选传感器节点与所述源传感器节点之间的投影距离;所述距离公式为: [0073] The sensor node according to the source coordinates and distance formula to obtain the projection distance between each of the second sensor node candidate node with the source sensor; is the distance formula:

[0074] d = +(YY)2 [0074] d = + (YY) 2

[0075] 其中,(X,Y)为所述第二候选传感器节点的X轴的坐标和Y轴的坐标,(X1, Y1)为所述源传感器节点的X轴的坐标和Y轴的坐标,d为所述投影距离。 Coordinates [0075] where, (X, Y) coordinates for the X-axis and Y-axis sensor of the second candidate node, (X1, Y1) of the X-axis of the source sensor node coordinates and the Y axis , d is the projection distance.

[0076] 例如,所述源传感器节点可以依据坐标和距离公式,获得表1所示的第二候选传感器节点的投影距离: Projection distance [0076] For example, the sensor node can be based on the source coordinates and distance formula, shown in Table 1 to obtain a second candidate sensor node:

[0077]表1 [0077] TABLE 1

[0078] [0078]

唯一标识符X轴的坐标Y轴的坐标Z轴的坐标投影距离剩余能量B "0 5 2?5 2 2?54 36 Coordinate projection distance Z axis coordinate Y axis coordinates X-axis unique identifier residual energy B "0 5 2? 5 2 2? 54 36

Figure CN103648141AD00091

[0079] 所述源传感器节点依据所述剩余能量与所述投影距离的商,获得每个所述第二候选传感器节点的通信权值,即源传感器节点利用剩余能量除以投影距离,计算得到每个第二候选传感器节点的通信权值。 [0079] The source of the residual energy of the sensor node based on the projection distance providers, each of the weights to obtain a communication candidate second sensor node, the sensor node that is the source using the remaining energy divided by the projection distance, calculated communication weight of each of the second candidate sensor node.

[0080] 最后,所述源传感器节点按照通信权值由大到小的顺序,对至少一个第二候选传感器节点进行排序,将其中通信权值最高的第二候选传感器节点作为目标传感器节点,选出的目标传感器节点是距离最近和/或最节省能量的源传感器节点的下一跳节点;这里,依据剩余能量与投影距离的商,计算得到第二候选传感器节点的权值,是因为需要优先选择剩余能量高的第二候选传感器节点和/或距离最近的第二候选传感器节点,而剩余能量越高、投影距离越近,则通信权值越大,因此,利用这里通信权值最高的第二候选传感器节点作为目标传感器节点。 [0080] Finally, according to the source communication node weight sensor descending order, at least a second sensor node candidate sort, in which the highest value of the right to communicate the second sensor node as a target candidate sensor node, selected from the target node is the nearest sensor and / or the next hop node of the source of the most energy-saving sensor nodes; herein, residual energy supplier based on the projection distance calculated by the second weight sensor node candidate, because priority high residual energy of the second selection candidate sensor node and / or the second candidate nearest sensor nodes, the higher the residual energy, the closer the projection distance, the greater the weight of the communication, and therefore, with the highest value of the right to communicate here two sensor node as a target candidate sensor node.

[0081] 步骤103,所述源传感器节点向所述目标传感器节点发送数据包。 [0081] Step 103, the source node transmits the sensor data packet to the target sensor node.

[0082] 具体的,所述源传感器节点在至少一个第一候选传感器节点中,选出目标传感器节点后,向该目标传感器节点发送数据包,数据包中携带目的传感器节点的唯一标识符和坐标,以便于收到该数据包的每个传感器节点都可以执行步骤101~步骤103,向自身的下一跳节点发送该数据包,使得数据包能够经过一条距离最近和/或能耗最低的路径最终到达目的传感器节点。 A unique identifier and a coordinate [0082] Specifically, after the source node at least one sensor a first sensor candidate node, selecting the target sensor node, the sensor node transmits to the target packet, the data packet carries the node object sensor , can be performed so that each sensor node to receive the packet in step 101 to step 103, transmits the packet to the next hop node itself, so that the packet can pass through a distance and / or path of least recently energy a final object of the sensor node.

[0083] 本发明实施例进一步给出实现上述方法实施例中各步骤及方法的装置实施例。 Embodiment [0083] The present invention is further given in embodiments implemented apparatus and method according to the steps in the above method embodiments.

[0084] 请参考图4,其为本发明实施例所提供的传感器节点的功能方块图,该传感器节点为上述源传感器节点,如图所示,该传感器节点包括: [0084] Please refer to FIG. 4, a functional block diagram of a sensor node according to embodiments of the present invention is provided, the sensor node to said source sensor node, as shown, the sensor node comprises:

[0085] 第一处理单元40,用于获得至少一个第一候选传感器节点的坐标和剩余能量; [0085] The first processing unit 40, and the coordinates for obtaining a residual energy of at least a first sensor node of the candidate;

[0086] 第二处理单元41,用于依据所述坐标、所述剩余能量和预设的抛物线,对所述至少一个第一候选传感器节点进行筛选,以获得目标传感器节点; [0086] The second processing unit 41, according to the coordinates, and the residual energy of a predetermined parabola, the at least one first screening candidate sensor node, the sensor node to obtain a target;

[0087] 发送单元42,用于向所述目标传感器节点发送数据包。 [0087] The transmitting unit 42 is configured to send sensor data packet to the target node.

[0088] 其中,所述第一处理单元40,具体用于: [0088] wherein the first processing unit 40 is specifically configured to:

[0089] 向所述至少一个第一候选传感器节点发送握手信息包,所述握手信息包中包含所述源传感器节点的坐标,以便于所述至少一个第一候选传感器节点中每个所述第一候选传感器节点向所述源传感器节点发送位置信息包,所述位置信息包中包含所述第一候选传感器节点的坐标和剩余能量。 [0089] at least a first candidate sensor node transmits a packet to the handshake, the handshake packet contains the coordinate information of the source node of the sensor, so that the at least one first candidate in each of the first sensor node a candidate position sensor node transmits the source sensor node packet, the packet includes position information and the coordinates of the remaining energy of the first sensor node candidate.

[0090] 其中,所述第二处理单元41,具体用于:[0091] 依据所述坐标和所述抛物线,对所述至少一个第一候选传感器节点进行筛选,以获得至少一个第二候选传感器节点; [0090] wherein the second processing unit 41 is specifically configured to: [0091] and according to the coordinates of the parabola, the at least one first sensor node candidate screening, candidate to obtain at least one second sensor node;

[0092]依据所述坐标和所述剩余能量,获得每个所述第二候选传感器节点的通信权值; [0092] and according to the coordinates of the remaining energy, weight for each communication to obtain the second candidate sensor node;

[0093] 依据所述通信权值最高的第二候选传感器节点,获得目标传感器节点。 [0093] The maximum value of the communication based on the weight of the second candidate sensor node, the sensor node to obtain a target.

[0094] 其中,所述第二处理单元41,具体用于: [0094] wherein the second processing unit 41, configured to:

[0095] 依据所述坐标和所述抛物线的公式,获得满足所述抛物线的公式的至少一个坐标;所述抛物线的公式为: [0095] and according to the coordinates of the parabola equation, a parabolic equation satisfied at least one coordinate; parabola of the formula:

[0096] (X-X1) 2-4a (Y-Y1) < O [0096] (X-X1) 2-4a (Y-Y1) <O

[0097] 其中,(X,Y)为所述第二候选传感器节点的坐标,(X1J1)为所述源传感器节点的坐标,a为所述抛物线的焦点的纵坐标; [0097] where, (X, Y) of the second candidate coordinate sensor node, (X1J1) for the source node coordinate sensor, a is the focus of the parabola of ordinate;

[0098] 依据所述满足所述抛物线的公式的至少一个坐标中,每个所述坐标对应的第一候选传感器节点,获得所述至少一个第二候选传感器节点。 [0098] based on at least one of the coordinates of the parabola satisfies the formula, each of said sensor corresponding to the coordinates of the first candidate node, obtaining the at least a second sensor node candidate.

[0099] 其中,所述第二处理单元41,具体用于: [0099] wherein the second processing unit 41, configured to:

[0100] 依据所述坐标和距离公式,获得每个所述第二候选传感器节点与所述源传感器节点之间的投影距离;所述距离公式为: [0100] According to the coordinates and distance formula to obtain the projection distance between each of the second sensor node candidate node with the source sensor; is the distance formula:

[0101] [0101]

Figure CN103648141AD00101

[0102] 其中,(X,Y)为所述第二候选传感器节点的坐标,(X1J1)为所述源传感器节点的坐标,d为所述投影距离; [0102] where, (X, Y) of the second candidate coordinate sensor node, (X1J1) coordinates of the source of sensor nodes, d is the projection distance;

[0103] 依据所述剩余能量与所述投影距离的商,获得每个所述第二候选传感器节点的通信权值。 [0103] according to the remaining energy of the projection distance and the quotient of the weight of each communication to obtain the second candidate sensor node.

[0104] 请参考图5,其为本发明实施例所提供的传感器节点的结构示意图,该传感器节点为上述源传感器节点,如图所示,该传感器节点包括: [0104] Please refer to FIG. 5, a schematic structural view of the sensor node according to an embodiment of the invention, the sensor node to said source sensor node, as shown, the sensor node comprises:

[0105] 存储器50,用于存储一组或多组程序代码; [0105] memory 50 for storing one or more sets of program code;

[0106] 处理器51,与存储器50和发射器52分别耦合,用于调用存储器50中存储的程序代码,用于执行以下操作:获得至少一个第一候选传感器节点的坐标和剩余能量;依据所述坐标、所述剩余能量和预设的抛物线,对所述至少一个第一候选传感器节点进行筛选,以获得目标传感器节点; [0106] processor 51, memory 50 and are coupled to the transmitter 52, program code stored in memory 50 calls for performing the following operations: obtaining the coordinates of the at least one first and the residual energy of the sensor node candidate; according to the said coordinates, the remaining energy and the preset parabola, the at least one first screening candidate sensor node, the sensor node to obtain a target;

[0107] 发射器52,用于向所述目标传感器节点发送数据包。 [0107] The transmitter 52, for transmitting the sensor data packet to the target node.

[0108] 处理器51对应于图4所示的传感器节点的第一处理单元40和第二处理单元41 ;发射器52对应于图4所示的传感器节点的发送单元42。 [0108] The processor node 51 corresponding to the sensor shown in FIG. 4 the first processing unit 40 and the second processing unit 41; a transmitter 52 corresponding to the sensor node shown in FIG. 4 of the transmission unit 42.

[0109] 本发明实施例的技术方案具有以下有益效果: [0109] Technical solutions of the embodiments of the present invention has the following advantages:

[0110] 1、源传感器节点利用源传感器节点与第一候选传感器节点之间简单的2次通信方式,获得第一候选传感器节点的坐标和剩余能量,进而确定最优的下一跳节点,能够减少源传感器节点的能量消耗,延长源传感器节点的工作时长。 [0110] 1, a simple communication between the secondary source node with the source sensor and the first sensor node candidate sensor node, obtain the coordinates of the first candidate and the remaining energy of the sensor node, and to determine the optimal next hop nodes, can be reduce the energy consumption of sensor nodes source, source extension operation of the sensor node long.

[0111] 2、利用抛物线在三维无线传感器网络中确定下一跳节点的范围,降低了源传感器节点确定下一跳节点的计算量,经过实际分析,利用该方法对第一候选传感器节点进行筛选,可以滤除65%左右的下一跳冗余节点。 [0111] 2, using the parabolic next hop node determined in the range of three wireless sensor networks, reducing the amount of calculation hop node determines the source of the sensor nodes, after the actual analysis, using the method of the first sensor node candidate screening , you can filter out 65% about the next hop node of redundancy.

[0112] 综上所述,本发明实施例提供的技术方案,在引入少量的通信开销的情况下,大大降低了整个三维无线传感器网络的通信能耗,延长三维无线传感器网络的工作时间,经过实际测量分析,与传统的定向扩散路由算法相比,本发明实施例提供的技术方案能够降低28%的传感器节点的能耗。 Working Time [0112] In summary, the technical solutions provided in the embodiments of the present invention, in the case of introducing a small amount of communication overhead, greatly reducing the energy consumption of the entire three-dimensional communication in wireless sensor networks, wireless sensor networks to extend the three-dimensional, through analysis of the actual measurement, compared with the conventional directional diffusion algorithm, embodiments of the present invention provide a technical solution to reduce the energy consumption of sensor nodes 28%.

[0113] 以上所述仅为本发明的较佳实施例而已,并不用以限制本发明,凡在本发明的精神和原则之内,所做的任何修改、等同替换、改进等,均应包含在本发明保护的范围之内。 [0113] The foregoing is only preferred embodiments of the present invention but are not intended to limit the present invention, all within the spirit and principle of the present invention, any changes made, equivalent substitutions and improvements should be included within the scope of protection of the present invention.

Claims (10)

1.一种无线传感器网络的通信方法,其特征在于,所述方法包括: 源传感器节点获得至少一个第一候选传感器节点的坐标和剩余能量; 所述源传感器节点依据所述坐标、所述剩余能量和预设的抛物线,对所述至少一个第一候选传感器节点进行筛选,以获得目标传感器节点; 所述源传感器节点向所述目标传感器节点发送数据包。 1. A communication method in a wireless sensor network, wherein said method comprises: a source sensor node obtains the coordinates of the at least one first and the residual energy of the sensor node candidate; the source node according to the coordinate sensor, said remaining and a preset energy of the parabola, the at least one first sensor node candidate screening, to obtain a target sensor node; the source sensor node sends a packet to the target sensor node.
2.根据权利要求1所述的方法,其特征在于,所述源传感器节点获得至少一个第一候选传感器节点的坐标和剩余能量,包括: 所述源传感器节点向所述至少一个第一候选传感器节点发送握手信息包,所述握手信息包中包含所述源传感器节点的坐标,以便于所述至少一个第一候选传感器节点中每个所述第一候选传感器节点向所述源传感器节点发送位置信息包,所述位置信息包中包含所述第一候选传感器节点的坐标和剩余能量。 2. The method according to claim 1, characterized in that, the sensor node obtains the coordinates of the source and the residual energy of at least a first candidate sensor node, comprising: a source of said at least one sensor node to the first candidate sensor node sends handshake packets, coordinate the handshake packet contains the source sensor node, so that said at least a first candidate position of each sensor node transmits the first candidate sensor node to the source node sensor packet, the packet includes position information and the coordinates of the remaining energy of the first sensor node candidate.
3.根据权利要求1所述的方法,其特征在于,所述源传感器节点依据所述坐标、所述剩余能量和预设的抛物线,对所述至少一个第一候选传感器节点进行筛选,以获得目标传感器节点,包括: 所述源传感器节点依据所述坐标和所述抛物线,对所述至少一个第一候选传感器节点进行筛选,以获得至少一个第二候选传感器节点; 所述源传感器节点依据所述坐标和所述剩余能量,获得每个所述第二候选传感器节点的通信权值; 所述源传感器节点依据所述通信权值最高的第二候选传感器节点,获得目标传感器节点。 3. The method according to claim 1, wherein the sensor node according to the coordinate of the source, the residual energy of a predetermined parabola, the at least one first sensor node candidate screening, to obtain target sensor node, comprising: a sensor node according to the source and the parabolic coordinates, a first of the at least one sensor node candidate screening, candidate to obtain at least a second sensor node; the source node based on the sensor said coordinates and the remaining energy, weight for each communication to obtain the second candidate sensor node; according to the weight of the source sensor communication node with the highest second candidate sensor node, the sensor node to obtain a target.
4.根据权利要求3所述的方法,其特征在于,所述源传感器节点依据所述坐标和所述抛物线,对所述至少一个第一候选传感器节点进行筛选,以获得至少一个第二候选传感器节点,包括: 所述源传感器节点依据所述坐标和所述抛物线的公式,获得满足所述抛物线的公式的至少一个坐标;所述抛物线的公式为: (X-X1) 2-4a (Y-Y1) < O 其中,(X,Y)为所述第二候选传感器节点的坐标,(X1, Y1)为所述源传感器节点的坐标,a为所述抛物线的焦点的纵坐标; 所述源传感器节点依据所述满足所述抛物线的公式的至少一个坐标中,每个所述坐标对应的第一候选传感器节点,获得所述至少一个第二候选传感器节点。 4. The method according to claim 3, wherein said source node based on the coordinate sensor and the parabola, the at least one first sensor node candidate screening, candidate to obtain at least one second sensor node, comprising: a sensor node according to the coordinate of the source and the parabolic equation, satisfies the formula of the parabola is obtained at least one coordinate; parabola of the formula: (X-X1) 2-4a (Y- Y1) <O where, (X, Y) coordinates of the second candidate for the sensor node, (X1, Y1) as the coordinates of the source sensor node, a is the ordinate is the focal point of the parabola; the source at least one sensor node according to the coordinates of the parabola satisfies the formula, each of said sensor corresponding to the coordinates of the first candidate node, obtaining the at least a second sensor node candidate.
5.根据权利要求3所述的方法,其特征在于,所述源传感器节点依据所述坐标和所述剩余能量,获得每个所述第二候选传感器节点的通信权值,包括: 所述源传感器节点依据所述坐标和距离公式,获得每个所述第二候选传感器节点与所述源传感器节点之间的投影距离;所述距离公式为: 5. The method according to claim 3, wherein said source node based on the coordinate sensor and the remaining energy, weight for each communication to obtain the second candidate sensor node, comprising: a source sensor node based on the coordinate and distance formula to obtain the projection distance between each of the second sensor node candidate node with the source sensor; is the distance formula:
Figure CN103648141AC00021
其中,(X,Y)为所述第二候选传感器节点的坐标,(X1, Y1)为所述源传感器节点的坐标,d为所述投影距离; 所述源传感器节点依据所述剩余能量与所述投影距离的商,获得每个所述第二候选传感器节点的通信权值。 Wherein, (X, Y) coordinates of the second candidate for the sensor node, (X1, Y1) as the coordinates of the source sensor node, d is the projection distance; the source sensor node according to the residual energy the quotient of the projection distance, the communication to obtain the second candidate value for each weight sensor node.
6.一种传感器节点,其特征在于,所述传感器节点为源传感器节点,所述传感器节点包括: 第一处理单元,用于获得至少一个第一候选传感器节点的坐标和剩余能量; 第二处理单元,用于依据所述坐标、所述剩余能量和预设的抛物线,对所述至少一个第一候选传感器节点进行筛选,以获得目标传感器节点; 发送单元,用于向所述目标传感器节点发送数据包。 A sensor node, wherein the sensor node is a source sensor node, the sensor node comprising: a first processing unit configured to obtain the coordinates and residual energy of at least a first candidate sensor node; a second process means for according to the coordinates, and the residual energy of a predetermined parabola, the at least one first sensor node candidate screening, to obtain a target sensor node; transmitting means for transmitting to the target sensor node data pack.
7.根据权利要求6所述的传感器节点,其特征在于,所述第一处理单元,具体用于: 向所述至少一个第一候选传感器节点发送握手信息包,所述握手信息包中包含所述源传感器节点的坐标,以便于所述至少一个第一候选传感器节点中每个所述第一候选传感器节点向所述源传感器节点发送位置信息包,所述位置信息包中包含所述第一候选传感器节点的坐标和剩余能量。 7. A sensor node according to claim 6, wherein the first processing unit, configured to: send a first candidate sensor node to said at least handshake packet, the packet containing the handshake said source sensor node coordinates, so that each of the first candidate sensor node to the source node transmits the sensor position information packet, the packet position information contained in the at least one first node of the first candidate sensor the remaining energy of the candidate coordinates and sensor nodes.
8.根据权利要求6所述的传感器节点,其特征在于,所述第二处理单元,具体用于: 依据所述坐标和所述抛物线,对所述至少一个第一候选传感器节点进行筛选,以获得至少一个第二候选传感器节点; 依据所述坐标和所述剩余能量,获得每个所述第二候选传感器节点的通信权值; 依据所述通信权值最高的第二候选传感器节点,获得目标传感器节点。 8. The sensor node of claim 6, wherein the second processing unit is configured to: according to the coordinates of the parabola, the at least one first sensor node candidate screened to obtaining at least a second sensor node candidate; and according to the coordinates of the remaining energy, weight for each communication to obtain the second candidate sensor node; communication according to the second candidate highest weight sensor nodes, to obtain the target sensor nodes.
9.根据权利要求8所述的传感器节点,其特征在于,所述第二处理单元,具体用于: 依据所述坐标和所述抛物线的公式,获得满足所述抛物线的公式的至少一个坐标;所述抛物线的公式为: (X-X1) 2-4a (Y-Y1) < O 其中,(X,Y)为所述第二候选传感器节点的坐标,(X1, Y1)为所述源传感器节点的坐标,a为所述抛物线的焦点的纵坐标; 依据所述满足所述抛物线的公式的至少一个坐标中,每个所述坐标对应的第一候选传感器节点,获得所述至少一个第二候选传感器节点。 9. The sensor node according to claim 8, wherein the second processing unit, configured to: according to the coordinates of the parabola and the formula, at least one coordinate is obtained satisfies the equation of the parabola; the parabola formula: (X-X1) 2-4a (Y-Y1) <O where, (X, Y) of the second candidate coordinate sensor node, (X1, Y1) of the source sensor the coordinates of nodes, a is the focus of the parabola ordinate; according to the formula of the parabola satisfies at least one of said coordinates, the coordinates of each candidate corresponding to a first sensor node, obtaining the at least one second candidate sensor node.
10.根据权利要求8所述的传感器节点,其特征在于,所述第二处理单元,具体用于: 依据所述坐标和距离公式,获得每个所述第二候选传感器节点与所述源传感器节点之间的投影距离;所述距离公式为: 其中,(X,Y)为所述第二候选传感器节点的坐标,(X1, Y1)为所述源传感器节点的坐标,d为所述投影距离; 依据所述剩余能量与所述投影距离的商,获得每个所述第二候选传感器节点的通信权值。 10. A sensor node according to claim 8, wherein the second processing unit, configured to: according to the coordinates and distance formula to obtain the second candidate of each sensor node and the source sensor projection distance between nodes; is the distance formula: wherein, (X, Y) of the second candidate coordinate sensor node, (X1, Y1) as the coordinates of the source sensor node, d is the projection distance; residual energy according to the supplier of the projection distance, the communication to obtain the second candidate value for each weight sensor node.
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