CN101466160B - Method and system for saving energy of wireless netted network node - Google Patents
Method and system for saving energy of wireless netted network node Download PDFInfo
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- CN101466160B CN101466160B CN2008102410753A CN200810241075A CN101466160B CN 101466160 B CN101466160 B CN 101466160B CN 2008102410753 A CN2008102410753 A CN 2008102410753A CN 200810241075 A CN200810241075 A CN 200810241075A CN 101466160 B CN101466160 B CN 101466160B
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Abstract
The invention relates to a node energy-saving method and a system in a wireless mesh network; wherein, the method comprises the steps that: step 1, before entering into the electricity saving mode, the node communicates with other nodes in the wireless mesh network and forms a tree-shaped routing composed of a root node, a middle node and a left node according to the wireless mash network routing protocol structure; step 2, the node can select one from a light sleep mode, a medium sleep mode and a deep sleep mode as the energy conservation mode according to the dump energy thereof or the preset information; step 3, the nodes entering into the medium sleep mode continue to broadcast the beaconing and receives the beaconing sent by all the father nodes on the tree-shaped routing and the child nodes in the deep sleep mode; step 4, the nodes in the medium sleep mode can execute data communication with the nodes which send out the beaconing according to the received beaconing, and executes the data communication with the child nodes not in the deep sleep mode through sending the beaconing. The method and the system can reduce the energy consumption of the nodes in the wireless mesh network.
Description
Technical field
The present invention relates to the computer technology and web-information technology field, relate in particular to node method for saving energy and system in a kind of wireless mesh network.
Background technology
Through the development in surplus ten years, the Internet obtained in the whole world using widely, and is dissolved among the daily life deeply.Along with the fast development of wireless communication technology, people have been reluctant to satisfy the Internet of complete wired form.So Wireless mesh technology begins to enter people's life, wireless mesh network has extended to wireless domain to the way of realization of the Internet from wired field, and has carried out the network topology structure of the Internet miniature.
Wireless mesh network is except having intelligent advantages such as self-organizing, management certainly, reparation automatically, homeostasis and node self-management, and the multiple spot jumper connection is the great advantage of wireless mesh network.
On the one hand, for the wireless network that modes such as traditional employing is star-like connect, common single fault just can make local even whole network paralysis easily.And wireless mesh network is a multiple spot jumper connection system, and many redundant communication path from the source to the destination are provided.If a paths quits work owing to hardware fault or interference, mesh network can change the route of packets of information automatically, makes them can utilize a unaffected alternative route.
On the other hand, as multiple spot jumper connection system, wireless mesh network can make a multihop network node just can arrive adjacent node under certain transmitting power, so in actual applications, it can effectively reduce transmitter power, thereby prolongs the useful life of battery.Low power nodes can also greatly improve the channeling degree, thereby reaches the purpose that improves network capacity.
Simultaneously, compare with traditional wireless network, Wireless mesh technology can provide bigger coverage, higher data rate and better fault recovery performance for the user.
Wireless mesh network comprises that scope is wider relatively, as long as there is a node of transmitting transmits data packets to other node in the wireless network, this network is exactly a wireless mesh network in general sense.In practice, wireless mesh network generally is meant the broadband wireless network of the GB15629.11 national standard that satisfies IEEE 802.11s standard or formulating.
According to IEEE 802.11s standard, comprise in a wireless mesh network: one or more mesh network is to the access point of wired network, called after MPP; A plurality of mesh node that are used to transmit number, called after MP, MP only have the data forwarding function; A plurality of mesh node and user access point, called after MAP, STA (subscriber station) can insert mesh network by MAP.The data of STA are forwarded to the access point MPP of mesh network to wired network by route, as shown in Figure 1.Wherein, MPP, MP, MAP are the node of wireless mesh network.All node broadcasts beacons of wireless mesh network, between the node according to described beacon phase mutually synchronization with communicate by letter.
In some application scenario, mesh node all is the mesh network access point, the perhaps key communication of a load, and this moment, the mains-supplied that adopt were not need to carry out power management more, the mesh network access point should all be in wake states in institute is free.Therefore, the energy-conservation of mesh network is a kind of option.Equipment vendor can select to carry out power-saving mechanism in some specific scheme, and other equipment vendors may not realize electric power management mechanism from the angle Selection that realizes expense.The scene that needs the mesh network power management function mainly is to adopt the occasion of solar cell for supplying power, and at present, more and more equipments is considering to adopt the novel energy power supply, therefore, strengthens netted network source management and seems more and more important with energy-saving scheme more.
The mesh network power management is being supported the power savings service and is being operated between mesh node under the power supply preservation mode available.
According to IEEE 802.11s standard, a mesh node of supporting the power savings service, be called and support energy-conservation mesh node (Power-save Supporting Mesh Point, abbreviate PSSMP as), PSSMP can carry out data processing under the power supply preservation mode, carry out frame traffic with mesh node.A mesh node of moving under the power supply preservation mode is called as energy-conservation mesh node, abbreviates PSMP as, and PSMP can only set up with keeping with PSSMP and be connected.
A mesh node always is in following two states:
Wake states, mesh node can be transmitted and received frame, and is in complete power supply state;
Resting state, mesh node can not be transmitted or received frame, and is in power save mode.
The transformation rule of mesh node between above-mentioned two states is by the powder source management mode decision of mesh node.The powder source management mode of mesh node comprises:
Activity pattern, mesh node always are in wake states;
Energy saver mode, mesh node according to frame transmission and the rule that receives revive and resting state between switch.
Energy saver mode further is divided into according to energy-conservation rank:
Shallow sleep, mesh node sends and comprises traffic indication message (Traffic IndicationMessage, TIM) and pay traffic indication message (Delivery Traffic IndicationMessage, DTIM) beacon, and wake up at the window of reviving of the window information element of reviving (Awake Window InformationElement) appointment, mesh node receives the beacon from all reciprocity mesh node (peerMP).
Deep sleep, MP send to be paid traffic indication message (DTIM) beacon, only wake up at the DTIM of the window information element of reviving (Awake Window IE) the appointment window of reviving.
According to IEEE 802.11s standard, existing mesh network Routing Protocol is tree-shaped Routing Protocol, and promptly the result of route is that all nodes constitute a tree-shaped communication construction in same channel.Save agreement according to tree-shaped route and existing power supply, shallow sleep mesh node must receive from all reciprocity mesh node (peerMP), comprise the route upstream node, the route upstream node is the father node of this node, with the route descendant node, the route descendant node is the child node of this node, beacon.And in fact, the mesh node of this moment can receive only the beacon from father node fully, and does not receive the beacon of the child node transmission that is under the same resting state.Therefore, can consider to introduce a kind of shallow sleep pattern, allow node receive only beacon, thereby help further reducing the power consumption of part of nodes from father node.
Summary of the invention
For addressing the above problem, the invention discloses node method for saving energy and system in a kind of wireless mesh network, to reduce the energy consumption of node in the wireless mesh network.
The invention discloses the power-economizing method of node in a kind of wireless mesh network, before entering energy-saving mode, node constitutes the tree-shaped route that comprises root node, intermediate node and leaf node, all node broadcasts beacons, between the node according to described beacon phase mutually synchronization with communicate by letter, described method also comprises:
Step 1, node be according to self dump energy or presupposed information, selects a kind of as energy saver mode in shallow sleep pattern, middle sleep pattern, the deep sleep mode;
Step 2, the node of sleep pattern continues the broadcast transmission beacon in entering, and receives the beacon of described node all father nodes on tree-shaped route and the child node transmission that is in deep sleep mode;
Step 3, the node of sleep pattern carries out data communication according to the beacon that receives with the node that sends described beacon in being in, and the child node that is in non-deep sleep mode by the transmission beacon together is carried out data communication.
Described method also comprises:
Step 21 enters and is between the node of deep sleep or shallow sleep pattern and communicates according to IEEE802.11S or GB15629.11 standard.
The beacon that the node of sleep pattern basis receives in being in the described step 3 carries out data communication with the node that sends described beacon and further is,
Step 31, comprise the window information element of reviving in the beacon that the node of sleep pattern receives in described being in, and described node remains to send to the data of the node that sends described beacon or the TIM and the DTIM of described beacon indicates when being cached with the data that are sent to described node in the node that sends described beacon, described node remains wake states in the window of reviving of the described window information element appointment of reviving, to carry out data communication with the node that sends described beacon.
The beacon that the node of sleep pattern basis receives in being in the described step 3 carries out data communication with the node that sends described beacon and further is,
Step 41 does not comprise in the beacon that the node of sleep pattern receives in described being in when reviving the window information element, and described node changes resting state over to after receiving described beacon.
The node of sleep pattern continuation transmission beacon further is in entering in the described step 2,
Whether step 51 comprises TIM, DTIM and the window information element of reviving in the beacon that the node of sleep pattern is determined to send according to IEEE 802.11s standard in described being in.
Carry out data communication and further be by sending child node that beacon is in non-deep sleep mode together in the described step 3,
Step 61, the node of sleep pattern remains wake states in the window of reviving of the described window information element appointment of reviving in described being in, to carry out data communication with described child node.
The invention also discloses the energy conserving system of node in a kind of wireless mesh network, described system comprises and being used for before entering energy-saving mode, the route that constitutes the tree-shaped route that comprises root node, intermediate node and leaf node is set up module, the beacon transceiver module that is used for broadcast beacon, between the node according to described beacon phase mutually synchronization with communicate by letter, described system also comprises mode selection module and data communication module:
Described mode selection module is used for dump energy or presupposed information according to node self, selects a kind of as energy saver mode in shallow sleep pattern, middle sleep pattern, the deep sleep mode;
Described beacon transceiver module is used for when node enters sleep pattern, continues the broadcast transmission beacon, and receives described node all father nodes and be in the beacon that the child node of deep sleep mode sends on tree-shaped route;
Described data communication module is used for when node is in sleep pattern, carries out data communication according to the beacon that receives with the node that sends described beacon, and the child node that is in non-deep sleep mode by the transmission beacon together is carried out data communication.
Described data communication module also is used for when node enters and be in deep sleep or shallow sleep pattern, communicates with the node that other are in deep sleep or shallow sleep pattern according to IEEE802.11S or GB15629.11 standard.
Described data communication module comprises the window information element of reviving in the beacon that the node that is further used for sleep pattern in described being in according to the beacon that receives when the node of the described beacon of transmission carries out data communication together receives, and described node remains to send to the data of the node that sends described beacon or the TIM and the DTIM of described beacon indicates when being cached with the data that are sent to described node in the node that sends described beacon, keep described node in the window of reviving of the described window information element appointment of reviving, to remain wake states, to carry out data communication with the node that sends described beacon.
Described data communication module does not comprise when reviving the window information element in the beacon that the node that is further used for sleep pattern in described being in according to the beacon that receives when the node of the described beacon of transmission carries out data communication together receives, and described node changes resting state over to after receiving described beacon.
Whether described beacon transceiver module after the sleep pattern, comprises TIM, DTIM and the window information element of reviving in the beacon that is further used for determining to send according to the IEEE802.11s standard in described node enters.
Described data communication module is wake states in the window of reviving of the described window information element appointment of reviving when the child node that is in non-deep sleep mode by the transmission beacon together is carried out data communication, to carry out data communication with described child node.
Beneficial effect of the present invention is, because the beacon of sleep pattern and shallow sleep pattern child node during the sleep pattern lower node needn't receive in of the present invention, thereby lower than shallow sleep node power consumption, and higher slightly than deep sleep mode power consumption.
Description of drawings
Fig. 1 is the wireless mesh network schematic diagram;
Fig. 2 is a node method for saving energy flow chart in the wireless mesh network of the present invention;
Fig. 3 is the routing tree that Fig. 1 generates according to Routing Protocol among the IEEE 802.11S;
Fig. 4 is a typical battery discharge curve chart;
Fig. 5 is the energy-conservation system construction drawing of node in the wireless mesh network of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail.
Fig. 1 is the wireless mesh network schematic diagram.As shown in Figure 1, according to IEEE 802.11s standard, comprise in a wireless mesh network: one or more mesh network is to the access point of wired network, called after MPP; A plurality of mesh node that are used to transmit number, called after MP, MP only have the data forwarding function; A plurality of mesh node and user access point, called after MAP, STA (subscriber station) can insert mesh network by MAP.The data of STA are forwarded to the access point MPP of mesh network to wired network by route.
Energy saver mode of the present invention is divided into according to energy-conservation rank:
Shallow sleep pattern, node sends the beacon that comprises TIM and DTIM, and wakes up at the window of reviving of the window information element appointment of reviving, and node receives the beacon from all peer node (peerMP);
Middle sleep pattern, node sends the beacon that comprises TIM and DTIM, and wake up at the window of reviving of the window information element appointment of reviving, node receives only the beacon of part equity mesh node, and described part equity mesh node is for the father node of this node and be in the child node of deep sleep state;
Deep sleep mode, node send the beacon comprise DTIM, only wake up at the DTIM of the window information element appointment of the reviving window of reviving.
Sleep pattern or shallow sleep pattern during if node is in then claim this node to be in non-deep sleep mode.
Than IEEE 802.11s prior art, the present invention has increased middle sleep pattern, comprises specifically how node enters middle sleep pattern, how to communicate by letter with child node with the father node of tree-shaped route at middle sleep pattern lower node.
Comprise power management control bit (PwrMgt) and energy-conservation rank (PowerSave Level) with the relevant bit of wireless mesh network power management among the IEEE 802.11s, lay respectively at the identification field (Mesh Flags field) of the frame control domain and the mesh network head (Mesh Header) of wireless mesh network frame, as shown in the table.
When the power management control bit was 0, activity grade was high, and energy-saving mode is movable, and energy-conservation level domain is a reservation state; When the power management control bit was 1, activity grade was low, and energy-saving mode is sleep.
The relevant bit of wireless mesh network power management of the present invention is as shown in the table, and it is 3 that energy-conservation rank is expanded.
When energy-saving mode is shallow sleep, energy-conservation level domain is 000 o'clock, and node sends the beacon that comprises TIM and DTIM, and wakes up at the window of reviving of the window information element appointment of reviving, and node receives the beacon from all peer node;
When energy-saving mode is middle sleep, energy-conservation level domain is 010 o'clock, and node sends the beacon that comprises TIM and DTIM, and wakes up at the window of reviving of the window information element appointment of reviving, and node receives only the father node of this node and the beacon of deep sleep child node;
When energy-saving mode is a deep sleep, energy-conservation level domain is 111 o'clock, and node sends the beacon that comprises DTIM, only wakes up at the DITM of the window information element appointment of the reviving window of reviving.Node does not receive the beacon from other nodes.
Other values of energy-conservation level domain keep.
The method according to this invention may further comprise the steps as shown in Figure 2:
Step S201, before entering energy-saving mode, node constitutes the tree-shaped route that comprises root node, intermediate node and leaf node with other node communications in the wireless mesh network according to wireless mesh network route agreement, all node broadcasts beacons, between the node according to described beacon phase mutually synchronization with communicate by letter.
Each transceiver of node with wireless mesh network of a plurality of transceivers intercoms mutually with the transceiver of other nodes that work in same channel, constitutes the tree-shaped route that comprises root node, intermediate node and leaf node according to the wireless mesh network route agreement that defines among the IEEE 802.11S.The wireless mesh network of Fig. 1 according to the tree-shaped route of the generation of the wireless mesh network route agreement among the IEEE 802.11S as shown in Figure 3, the line between the node is represented between two nodes and is had routed path, promptly constitutes the set membership of tree-shaped route.Node A1, Node B 1, subscriber station C1, subscriber station C2 constitute a tree, and node A2, node D1, node D2, node D3, Node B 2, subscriber station C3, subscriber station C4 have constituted an other tree.Every inner node and subscriber station of tree all works in same channel, but two trees may belong to different owners respectively, so they may be operated in different channels respectively, also can be operated in identical channel.When working in identical channel, be the phase mutual interference between them, in IEEE 802.11s standard corresponding protocol, make the revive window of reviving of window information element appointment of the agreement of node not overlapping as far as possible, the beacon that allows node send does not conflict as far as possible.
Step S202, each node on the tree-shaped route is selected a kind of as energy saver mode in shallow sleep pattern, middle sleep pattern and the deep sleep mode according to self remaining battery power or presupposed information.
In the energy-conservation occasion of needs, generally adopt to add powered battery modes such as storage battery as solar panels.According to the discharge curve of battery, can determine the battery dump energy of node.Provided the typical discharge curve of a battery among Fig. 4,, can determine that wireless mesh network works in one of shallow sleep pattern, middle sleep pattern or deep sleep mode according to this curve and battery dump energy.If all devices all adopts long-acting supply power modes such as civil power, can allow node all work in middle sleep pattern by the presetting of network manager.
With tree-shaped route among Fig. 3 is example, and wherein node A1, Node B 2, node A2 work in shallow sleep pattern; Node B 1, node D1, node D2 work in middle sleep pattern; Node D3 works in deep sleep mode; The present invention does not relate to the energy-saving mode of subscriber station.
Step S203, the node of sleep pattern continue to send beacon in entering, but stop the sink tree first class by on be in the beacon that non-deep sleep mode child node sends.
In Fig. 3, Node B 1, node D1, node D2 work in middle sleep pattern.In the present embodiment, have only D1 to have in the node of sleep in being in and be in non-deep sleep mode child node D2, so node D1 stops to receive the beacon of D2.
Step S204, the node of sleep pattern carries out data communication according to the beacon that receives with the node that sends this beacon in being in, and the node of middle sleep pattern carries out data communication by the beacon that sends with the child node that works in non-deep sleep mode.
Wherein, comprise that the node of middle sleep pattern is with all sleep pattern father nodes of this node and the communication between the deep sleep mode child node.
Comprise the window information element of reviving in the beacon that the node of sleep pattern receives in being in, and this node remains to send to the data of the node that sends described beacon or the TIM and the DTIM of described beacon indicates when being cached with the data that are sent to described node in the node that sends this beacon, described node remains wake states in the window of reviving of the described window information element appointment of reviving, to carry out data communication with the node that sends described beacon.
Do not comprise in the beacon that the node of sleep pattern receives in described being in when reviving the window information element, this node changes resting state over to after receiving described beacon.
In Fig. 3, comprise that Node B 1 is according to receiving the communication of the beacon of node A1 with node A1; Node D1 communicates by letter with node A2 according to the node A2 beacon that receives; Node D2 communicates by letter with node D1 according to the node D1 beacon that receives; Node D1 communicates by letter with node D3 according to the node D3 beacon that receives with Node B 2.
For instance, in Fig. 3, node D1 is as follows with the communication process of node A2 communication according to the node A2 beacon that receives: node A2 avoids agreement to select the beacon transmitting time according to the beacon collision that defines in IEEE 802.11s standard or the GB15629.11 standard, send beacon periodically, comprise optional TIM and optional DTIM in this beacon, and the window information element of optionally reviving, and wake up at the window of reviving that has comprised the window information element of reviving, receive from the data of child node D1 and to child node D1 and send data.
The beacon that node D1 receiving node A2 sends.If among the TIM of node A2 beacon and the DTIM instructs node A2 buffer memory be sent to node D1 data or node D1 the data node A2 of giving to be sent is arranged, the window of reviving of the window information element of reviving that then in node A2 beacon, carries, keeping node D1 is wake states, sends data and receives data to node A2 during this period.If do not have the window information element of reviving in the node A2 beacon, then after node D1 is being received this beacon, change resting state over to.
If in the beacon that node A2 sends, do not comprise and revive the window information element but comprise TIM or DTIM, then finish and all child nodes, node D1, communication before or before current beacon period finished, keeping node A2 was wake states.If in the beacon that sends, do not comprise the window information element of reviving, do not comprise TIM and DTIM yet, then after A2 sent beacon, node A2 changed resting state over to.
The node of middle sleep pattern carries out data communication by sending beacon with the child node that works in non-deep sleep mode, and wherein, the node of sleep pattern is with the communication between all non-deep sleep mode child nodes in comprising.
The node that is in sleep pattern is according to whether comprising TIM, DTIM and the window information element of reviving in the definite beacon that sends of IEEE 802.11s standard.
The node of sleep pattern remains wake states in the window of reviving of window information element appointment of reviving in being in, to carry out data communication with child node.
As shown in Figure 3, node D1 transmission beacon is communicated by letter with node D2.Because node D2, Node B 1 are not the child node of node, the child node of Node B 1 is a subscriber station, so they do not send beacon.
For the node D1 of middle sleep pattern, it is communicated by letter with D2 by sending beacon.Node D1 avoids agreement to select the beacon transmitting time according to the beacon collision that defines in IEEE802.11s standard or the GB15629.11 standard, send beacon periodically, comprise optional TIM and optional DTIM in this beacon, and the window information element of optionally reviving, and wake up at the window of reviving that has comprised the window information element of reviving, receive from the data of child node D2 and to child node D2 and send data.
Therefore, according to IEEE 802.11s standard, GB15629.11 standard, can draw, of the present invention in the node of sleep pattern be with the difference of the node of the communication means of the child node of shallow sleep pattern and middle sleep pattern with the child node of middle sleep pattern: the beacon of the child node of sleep pattern and shallow sleep pattern during middle sleep pattern father node does not receive.Therefore, the shallow sleep pattern child node TIM that must avoid at own beacon with optionally carry and the relevant information of middle sleep pattern father node among the DTIM.
Step S205, enter and be in the mode that the mode of intercommunication of the node of deep sleep or shallow sleep pattern adopts IEEE 802.11s standard or GB15629.11 standard to define and carry out, this comprised all non-in communication between sleep pattern father and sons' the node.
Therefore, according to IEEE 802.11s standard, GB15629.11 standard, can draw, the node of middle sleep pattern of the present invention is identical with the communication means of the father node of middle sleep pattern with the node of middle sleep pattern with the communication means of the father node of shallow sleep pattern.At shallow sleep pattern father node, in node and the difference of other shallow sleep pattern child nodes of sleep pattern be: the beacon of the child node of sleep pattern during shallow sleep pattern father node may not receive perhaps receives beacon but does not comprise TIM relevant with father node and DTIM in the beacon of the child node of sleep pattern in the discovery.
System configuration of the present invention as shown in Figure 5.
System comprises that route sets up module 501, mode selection module 502, beacon transceiver module 503, data communication module 504.
Route is set up module 501 and is used for before node enters energy-saving mode, with other node communications in the wireless mesh network, constitutes the tree-shaped route that comprises root node, intermediate node and leaf node according to wireless mesh network route agreement.
Whether comprise TIM, DTIM and the window information element of reviving in the beacon that beacon transceiver module 503 is further used for after the sleep pattern determining to send according to the IEEE802.11s standard in node enters.
Those skilled in the art can also carry out various modifications to above content under the condition that does not break away from the definite the spirit and scope of the present invention of claims.Therefore scope of the present invention is not limited in above explanation, but determine by the scope of claims.
Claims (12)
1. the power-economizing method of node in the wireless mesh network, before entering energy-saving mode, node constitutes the tree-shaped route that comprises root node, intermediate node and leaf node, all node broadcasts beacons, between the node according to described beacon phase mutually synchronization with communicate by letter, it is characterized in that described method also comprises:
Step 1, node be according to self dump energy or presupposed information, selects a kind of as energy saver mode in shallow sleep pattern, middle sleep pattern, the deep sleep mode;
Step 2, the node of sleep pattern continues the broadcast transmission beacon in entering, and receives the beacon of described node all father nodes on tree-shaped route and the child node transmission that is in deep sleep mode;
Step 3, the node of sleep pattern carries out data communication according to the beacon that receives with the node that sends described beacon in being in, and the child node that is in non-deep sleep mode by the transmission beacon together is carried out data communication.
2. node method for saving energy in the wireless mesh network as claimed in claim 1 is characterized in that, also comprises after the described step 2:
Step 21 enters and is between the node of deep sleep or shallow sleep pattern and communicates according to IEEE802.11S or GB15629.11 standard.
3. node method for saving energy in the wireless mesh network as claimed in claim 1 is characterized in that,
The beacon that the node of sleep pattern basis receives in being in the described step 3 carries out data communication with the node that sends described beacon and further is,
Step 31, comprise the window information element of reviving in the beacon that the node of sleep pattern receives in described being in, and described node remains to send to the data of the node that sends described beacon or the TIM and the DTIM of described beacon indicates when being cached with the data that are sent to described node in the node that sends described beacon, described node remains wake states in the window of reviving of the described window information element appointment of reviving, to carry out data communication with the node that sends described beacon.
4. node method for saving energy in the wireless mesh network as claimed in claim 3 is characterized in that,
The beacon that the node of sleep pattern basis receives in being in the described step 3 carries out data communication with the node that sends described beacon and further is,
Step 41 does not comprise in the beacon that the node of sleep pattern receives in described being in when reviving the window information element, and described node changes resting state over to after receiving described beacon.
5. node method for saving energy in the wireless mesh network as claimed in claim 1 is characterized in that,
The node of sleep pattern continuation transmission beacon further is in entering in the described step 2,
Whether step 51 comprises TIM, DTIM and the window information element of reviving in the beacon that the node of sleep pattern is determined to send according to IEEE 802.11s standard in described being in.
6. node method for saving energy in the wireless mesh network as claimed in claim 5 is characterized in that,
Carry out data communication and further be by sending child node that beacon is in non-deep sleep mode together in the described step 3,
Step 61, the node of sleep pattern remains wake states in the window of reviving of the described window information element appointment of reviving in described being in, to carry out data communication with described child node.
7. the energy conserving system of node in the wireless mesh network, described system comprises and being used for before entering energy-saving mode, the route that constitutes the tree-shaped route that comprises root node, intermediate node and leaf node is set up module, the beacon transceiver module that is used for broadcast beacon, between the node according to described beacon phase mutually synchronization with communicate by letter, it is characterized in that described system also comprises mode selection module and data communication module:
Described mode selection module is used for dump energy or presupposed information according to node self, selects a kind of as energy saver mode in shallow sleep pattern, middle sleep pattern, the deep sleep mode;
Described beacon transceiver module is used for when node enters sleep pattern, continues the broadcast transmission beacon, and receives described node all father nodes and be in the beacon that the child node of deep sleep mode sends on tree-shaped route;
Described data communication module is used for when node is in sleep pattern, carries out data communication according to the beacon that receives with the node that sends described beacon, and the child node that is in non-deep sleep mode by the transmission beacon together is carried out data communication.
8. the energy-conservation system of node is characterized in that in the wireless mesh network as claimed in claim 7,
Described data communication module also is used for when node enters and be in deep sleep or shallow sleep pattern, communicates with the node that other are in deep sleep or shallow sleep pattern according to IEEE802.11S or GB15629.11 standard.
9. the energy-conservation system of node is characterized in that in the wireless mesh network as claimed in claim 7,
Described data communication module comprises the window information element of reviving in the beacon that the node that is further used for sleep pattern in described being in according to the beacon that receives when the node of the described beacon of transmission carries out data communication together receives, and described node remains to send to the data of the node that sends described beacon or the TIM and the DTIM of described beacon indicates when being cached with the data that are sent to described node in the node that sends described beacon, keep described node in the window of reviving of the described window information element appointment of reviving, to remain wake states, to carry out data communication with the node that sends described beacon.
10. the energy-conservation system of node is characterized in that in the wireless mesh network as claimed in claim 9,
Described data communication module does not comprise when reviving the window information element in the beacon that the node that is further used for sleep pattern in described being in according to the beacon that receives when the node of the described beacon of transmission carries out data communication together receives, and described node changes resting state over to after receiving described beacon.
11. the energy-conservation system of node is characterized in that in the wireless mesh network as claimed in claim 7,
Whether described beacon transceiver module after the sleep pattern, comprises TIM, DTIM and the window information element of reviving in the beacon that is further used for determining to send according to the IEEE802.11s standard in described node enters.
12. the energy-conservation system of node in the wireless mesh network of stating as claim 11 is characterized in that,
Described data communication module is wake states in the window of reviving of the described window information element appointment of reviving when the child node that is in non-deep sleep mode by the transmission beacon together is carried out data communication, to carry out data communication with described child node.
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