CN104469882B - The cut-in method and user terminal of wireless mesh network - Google Patents

The cut-in method and user terminal of wireless mesh network Download PDF

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Publication number
CN104469882B
CN104469882B CN201410665562.8A CN201410665562A CN104469882B CN 104469882 B CN104469882 B CN 104469882B CN 201410665562 A CN201410665562 A CN 201410665562A CN 104469882 B CN104469882 B CN 104469882B
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user terminal
positional information
node
path
gateway node
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CN104469882A (en
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杨峰
陈康先
李盛阳
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GCI Science and Technology Co Ltd
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GCI Science and Technology Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W40/00—Communication routing or communication path finding
    • H04W40/02—Communication route or path selection, e.g. power-based or shortest path routing
    • H04W40/20—Communication route or path selection, e.g. power-based or shortest path routing based on geographic position or location
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L45/00—Routing or path finding of packets in data switching networks
    • H04L45/12—Shortest path evaluation
    • H04L45/122—Shortest path evaluation by minimising distances, e.g. by selecting a route with minimum of number of hops

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The invention discloses a kind of cut-in method of wireless mesh network, including：User terminal obtains the positional information of gateway node；The positional information of each Mesh node of the user terminal in moving process around real-time acquisition；The user terminal calculates each Mesh nodes around to the path of the gateway node respectively according to the positional information of each Mesh nodes and the positional information of the gateway node of surrounding；The user terminal selects nearest path from the path, as the access path for being connected to wireless mesh network；The user terminal is connected to the wireless mesh network according to the access path.At the same time the invention also discloses a kind of user terminal for accessing wireless mesh network, the networking path of user terminal can be adjusted in real time, the access efficiency of wireless mesh network is improved, can ensure that user terminal uses optimal route all the time in moving process.

Description

The cut-in method and user terminal of wireless mesh network
Technical field
The present invention relates to the cut-in method and user terminal of communication field, more particularly to a kind of wireless mesh network.
Background technology
Wireless mesh network (Wireless Mesh Networks, WMN) is the multi-hop wireless networks of a kind of self-organizing, self-configuring Network, compared with traditional WLAN, WMN has many advantages：(1) due to only needing seldom cable network tie point (gateway), The wiring cost of network substantially reduces；(2) multi-hop wireless communication provides wider array of wireless coverage；(3) wireless backbone In how point-to-multipoint connection, enhance the reliability of network；(4) established automatically between netted (Mesh) node and the company of maintenance Connect, be easy to the incremental deploying of network, network has good scalability.
The network structure of the wireless mesh network of the prior art is as shown in Figure 1.There are 4 class nodes in WMN：Mesh gateway nodes (Mesh Portal Point, MPP), Mesh forward node (Mesh Point, MP), Mesh access nodes (Mesh Access Point, MAP) and wireless terminal (Station, STA).In WMN, Mesh nodes (including MPP, MP and MAP) are with radio interconnected Mode form wireless backbone, wherein MPP is connected to Internet in a wired fashion as gateway (Gateway).MP conducts Router E-Packets for other Mesh nodes, and MAP provides wireless connection as AP for the mobile terminal in its coverage, moves Dynamic terminal (Phone, PDA etc.) establishes connection with covering the MAP in its region, and leads to gateway realization in a manner of wireless multi-hop Internet is accessed.
But such network structure there are problems that, as shown in Figure 2.When position movement occurs for user terminal STA When, there will be following aspects the problem of：
1) what is used is not optimal route；
Divided according to the function of Mesh nodes (including MPP, MP and MAP), MPP nodes provide route and access in radio work( Energy；MP nodes only provide wireless forwarding function；MAP nodes provide route and wireless access function.
Therefore, after STA movements, it can not also have to be by MAP1 access networks by MP node access networks networks, such as scheme Shown in 2, hence it is evident that be not the optimal path for accessing network.
2) in the overlay area of network, network can not but be accessed；
As shown in Fig. 2, if the power of MAP1 nodes is not big enough, STA is not in the coverage of MAP1 nodes, then STA It is possible to that network can not be accessed.This allows for STA and faces obviously in the coverage of Mesh network, can not but access network Difficult situation.
The content of the invention
Present invention aim to address user terminal to be linked into the problem of path of wireless mesh network is not optimal path, carries Go out a kind of cut-in method of wireless mesh network, comprise the following steps：
User terminal obtains the positional information of gateway node；
The positional information of each Mesh node of the user terminal in moving process around real-time acquisition；
The user terminal according to the positional information of each Mesh nodes and the positional information of the gateway node of surrounding, Each Mesh nodes around are calculated respectively to the path of the gateway node；
The user terminal selects nearest path from the path, as the access road for being connected to wireless mesh network Footpath；
The user terminal is connected to the wireless mesh network according to the access path.
Further, the user terminal obtains the positional information of gateway node, specifically includes：
The user terminal is linked into initial router node；
The user terminal sends position request information by the initial router node to the gateway node；
The user terminal obtains the positional information of the gateway node return by the initial router node.
Further, the user terminal in moving process believe in real time by the position of each Mesh nodes around acquisition Breath, specifically includes：
The beacon frame of each Mesh node broadcasts of the user terminal in moving process around real-time reception；The letter Mark identity and positional information that frame includes this Mesh nodes；
The user terminal obtains the positional information of each Mesh nodes of surrounding according to the beacon frame.
Further, the Mesh nodes are gateway node or router node；Wherein described gateway node is used to connect Wireless mesh network and Internet, and wireless access function can be provided for the user terminal；The router node is used for The user terminal provides wireless access function, and for forwarding data.
Further, the positional information is that this Mesh nodes are obtained by GPS or base station location.
Correspondingly, the embodiment of the present invention also provides a kind of user terminal, including：
First position information acquisition unit, for obtaining the positional information of gateway node；
Second place information acquisition unit, for each Mesh sections around being obtained in real time in user terminal moving process The positional information of point；
Path-calculating element, for the positional information of each Mesh nodes according to surrounding and the position of the gateway node Information, calculates each Mesh nodes around to the path of the gateway node respectively；
Access path selecting unit, for selecting nearest path from the path as being connected to wireless mesh network Access path；
Network insertion unit, for being connected to the wireless mesh network according to the access path.
Further, the first position information acquisition unit further includes：
Initial router access unit, for being linked into initial router node；
Position request information transmitting element, for sending position to the gateway node by the initial router node Solicited message；
Positional information receiving unit, for obtaining the position of the gateway node return by the initial router node Information.
Further, the second place information acquisition unit specifically includes：
Beacon frame receiving subelement, for each Mesh in the moving process of the user terminal around real-time reception The beacon frame of node broadcasts；The beacon frame includes identity and the positional information of this Mesh nodes；
Positional information extracts subelement, for according to the beacon frame, the position for obtaining each Mesh nodes of surrounding to be believed Breath.
Further, the Mesh nodes are gateway node or router node；Wherein described gateway node is used to connect Wireless mesh network and Internet, and wireless access function can be provided for the user terminal；The router node is used for The user terminal provides wireless access function, and for forwarding data.
Further, the positional information is obtained by this Mesh nodes by GPS or base station location.
Compared with the prior art, a kind of beneficial effect of the cut-in method of wireless mesh network proposed by the invention is： The networking path of user terminal can be adjusted in real time, improves the access efficiency of wireless mesh network, can ensure that user terminal is moving Optimal route is used all the time during dynamic.
The embodiment of the present invention also proposes a kind of user terminal for accessing wireless mesh network at the same time, using in wireless mesh network First position information and second place information carry out calculating processing, optimal access path can be also selected in moving process, The efficiency for being linked into network can be effectively improved.
Brief description of the drawings
Fig. 1 is the first access state figure of the wireless mesh network of the prior art；
Fig. 2 is the second access state figure of the wireless mesh network of the prior art；
Fig. 3 is a kind of flow diagram of the cut-in method of wireless mesh network provided in an embodiment of the present invention；
Fig. 4 is the idiographic flow schematic diagram of step S1 in Fig. 3；
Fig. 5 is the idiographic flow schematic diagram of step S2 in Fig. 3；
Fig. 6 is the second access state figure of wireless mesh network provided in an embodiment of the present invention；
Fig. 7 is a kind of structure diagram of user terminal provided in an embodiment of the present invention.
Embodiment
Below in conjunction with the attached drawing in the embodiment of the present invention, the technical solution in the embodiment of the present invention is carried out clear, complete Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, instead of all the embodiments.It is based on Embodiment in the present invention, those of ordinary skill in the art are obtained every other without creative efforts Embodiment, belongs to the scope of protection of the invention.
It is a kind of flow diagram of the cut-in method of wireless mesh network provided in an embodiment of the present invention referring to Fig. 3, the party Method comprises the following steps：
S1, user terminal obtain the positional information of gateway node；
S2, the positional information of each Mesh node of the user terminal in moving process around real-time acquisition；
S3, the user terminal are believed according to the positional information of each Mesh nodes of surrounding and the position of the gateway node Cease, respectively each Mesh nodes around calculating to the path of the gateway node；
S4, the user terminal select nearest path from the path, as the access for being connected to wireless mesh network Path；
S5, the user terminal are connected to the wireless mesh network according to the access path.
As shown in figure 4, it is the idiographic flow schematic diagram of step S1 in Fig. 3.In step sl, the user terminal obtains The positional information of gateway node specifically includes：
S11, the user terminal are linked into initial router node；
S12, the user terminal send position request information by the initial router node to the gateway node；
S13, the user terminal obtain the positional information of the gateway node return by the initial router node.
As shown in figure 5, it is the idiographic flow schematic diagram of step S2 in Fig. 3.In step s 2, the user terminal is moving The positional information of each Mesh nodes around being obtained in real time during dynamic specifically includes：
S21, the beacon frame of each Mesh node broadcasts of the user terminal in moving process around real-time reception；Institute State identity and positional information that beacon frame includes this Mesh nodes；
S22, the user terminal obtain the positional information of each Mesh nodes of surrounding according to the beacon frame.
As shown in fig. 6, it is the second access state figure of wireless mesh network provided in an embodiment of the present invention.
When it is implemented, in a kind of cut-in method for wireless mesh network that the embodiment of the present invention is provided, the Mesh Node is gateway node or router node；Wherein described gateway node is used to connect wireless mesh network and Internet, and energy Wireless access function is provided for the user terminal；For example, the MPP shown in Fig. 6 is gateway node；The router node is used for Wireless access function is provided for the user terminal, and for forwarding data；For example, M1, M2, M3, M4, M5, M6 shown in Fig. 6 It is router node with M7.
I.e. in step s 2, not only each router node is wide around acquisition in real time in moving process for the user terminal The beacon frame broadcast, and when the user terminal is moved in the coverage of the gateway node, while can also obtain institute State the beacon frame of gateway node.
When the user terminal receives the beacon frame of the gateway node, represent user terminal and be moved to the gateway In the coverage of node, in step s 4, nearest path is judged in the user terminal to need not move through other routers Node is directly connected to the gateway node.
Further, the positional information is that this Mesh nodes are obtained by GPS or base station location.
With reference to Fig. 6, the cut-in method of wireless mesh network provided in an embodiment of the present invention is illustrated.
The embodiment of the present invention is configured with new Mesh nodes, including gateway node or router node, for building Mesh Network.Wherein, the gateway node is used to connect wireless mesh network and Internet, and can be provided wirelessly for the user terminal Access function；For example, the MPP shown in Fig. 6 is gateway node；The router node is used to provide wirelessly for the user terminal Access function, and for forwarding data；For example, M1, M2, M3, M4, M5, M6 and M7 shown in Fig. 6 are router node.
In original state, user terminal STA is located in the signal cover of initial router node M 1.User terminal STA is linked into initial router node M 1, and the positional information of gateway node MPP is obtained by initial router node M 1.
User terminal STA is moved, the beacon frame of the Mesh nodes in moving process around reception.Assuming that user is whole The position of end STA is in the signal cover of router node M2, M3, M4 and M5, then user terminal STA can receive road The beacon frame broadcasted by device node M 2, M3, M4 and M5, therefrom obtains the positional information of router node M2, M3, M4 and M5.
User terminal STA calculates router node M2, M3, M4, M5 to the path of gateway node MPP respectively, and from described Nearest path is selected in path, as the access path for being connected to wireless mesh network.In the present embodiment, nearest path is route Device node M 4 arrives the path of gateway node MPP.User terminal STA is linked into wireless network using router node M4 as access node Shape net, then Internet is linked into by gateway node MPP.
The embodiment of the present invention is directed to routing update problem of the wireless mesh network user terminal in moving process, it is proposed that one The cut-in method of kind wireless mesh network, can enter according to the positional information of gateway node and the positional information calculation of router node Network footpath, and the networking path of adjustment user terminal in real time in the moving process of user terminal, improve connecing for wireless mesh network Enter efficiency, can ensure that user terminal uses optimal route all the time in moving process.
The embodiment of the present invention also provides a kind of user terminal, can be applied to wireless mesh network, realizes above-mentioned wireless network The embodiment of the cut-in method of shape net.
As shown in fig. 7, it is a kind of structure diagram of user terminal provided in an embodiment of the present invention.
The embodiment of the present invention provides a kind of user terminal, including：
First position information acquisition unit 11, for obtaining the positional information of gateway node；
Second place information acquisition unit 12, for each Mesh around being obtained in real time in user terminal moving process The positional information of node；
Path-calculating element 13, for the positional information of each Mesh nodes according to surrounding and the position of the gateway node Confidence ceases, respectively each Mesh nodes around calculating to the path of the gateway node；
Access path selecting unit 14, wireless mesh network is connected to for selecting nearest path to be used as from the path Access path；
Network insertion unit 15, for being connected to the wireless mesh network according to the access path.
Specifically, first position information acquisition unit 11 includes：
Initial router access unit 111, for being linked into initial router node；
Position request information transmitting element 112, for being sent by the initial router node to the gateway node Position request information；
Positional information receiving unit 113, for obtaining what the gateway node returned by the initial router node Positional information.
Further, the second place information acquisition unit 12 specifically includes：
Beacon frame receiving subelement, for each Mesh in the moving process of the user terminal around real-time reception The beacon frame of node broadcasts；The beacon frame includes identity and the positional information of this Mesh nodes；
Positional information extracts subelement, for according to the beacon frame, the position for obtaining each Mesh nodes of surrounding to be believed Breath.
Further, the Mesh nodes are gateway node or router node；Wherein described gateway node is used to connect Wireless mesh network and Internet, and wireless access function can be provided for the user terminal；The router node is used for The user terminal provides wireless access function, and for forwarding data.
Further, the positional information is obtained by this Mesh nodes by GPS or base station location.
The user terminal for a kind of access wireless mesh network that the embodiment of the present invention proposes, using the in wireless mesh network One positional information carries out calculating processing with second place information, and optimal access path can be also selected in moving process, can be had Improve the efficiency for being linked into network in effect ground.
Compared with the prior art, a kind of beneficial effect of the cut-in method of wireless mesh network proposed by the invention is： Can be according to the positional information of gateway node and the positional information calculation networking path of router node, and in the shifting of user terminal The networking path of user terminal is adjusted during dynamic in real time, the access efficiency of wireless mesh network is improved, can ensure user terminal Use optimal route all the time in moving process.
At the same time the embodiment of the present invention also propose a kind of user terminal, using the first position information in wireless mesh network with Second place information carries out calculating processing, and optimal access path can be also selected in moving process, can effectively improve access To the efficiency of network.
One of ordinary skill in the art will appreciate that realize all or part of flow in above-described embodiment method, being can be with Relevant hardware is instructed to complete by computer program, the program can be stored in a computer read/write memory medium In, the program is upon execution, it may include such as the flow of the embodiment of above-mentioned each method.Wherein, the storage medium can be magnetic Dish, CD, read-only memory (Read-Only Memory, ROM) or random access memory (Random Access Memory, RAM) etc..
The above is the preferred embodiment of the present invention, it is noted that for those skilled in the art For, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also considered as Protection scope of the present invention.

Claims (6)

  1. A kind of 1. cut-in method of wireless mesh network, it is characterised in that including：
    User terminal obtains the positional information of gateway node；
    The positional information of each Mesh node of the user terminal in moving process around real-time acquisition；
    The user terminal is according to the positional information of each Mesh nodes and the positional information of the gateway node of surrounding, difference Each Mesh nodes around are calculated to the path of the gateway node；
    The user terminal selects nearest path from the path, as the access path for being connected to wireless mesh network；
    The user terminal is connected to the wireless mesh network according to the access path；
    Wherein, the user terminal obtains the positional information of gateway node, specifically includes：The user terminal is linked into initial road By device node；The user terminal sends position request information by the initial router node to the gateway node；Institute State the positional information that user terminal obtains the gateway node return by the initial router node；The user terminal exists The positional information of each Mesh nodes around being obtained in real time in moving process, specifically includes：The user terminal is being moved through The beacon frame of each Mesh node broadcasts in journey around real-time reception；The beacon frame includes the identity of this Mesh nodes And positional information；The user terminal obtains the positional information of each Mesh nodes of surrounding according to the beacon frame.
  2. 2. the cut-in method of wireless mesh network as claimed in claim 1, it is characterised in that the Mesh nodes are gateway node Or router node；
    Wherein, the gateway node is used to connect wireless mesh network and I nternet, and can be provided wirelessly for the user terminal Access function；The router node is used to provide wireless access function for the user terminal, and for forwarding data.
  3. 3. the cut-in method of wireless mesh network as claimed in claim 2, it is characterised in that the positional information is this Mesh sections What point was obtained by GPS or base station location.
  4. A kind of 4. user terminal, it is characterised in that including：
    First position information acquisition unit, for obtaining the positional information of gateway node；
    Second place information acquisition unit, for each Mesh nodes around being obtained in real time in user terminal moving process Positional information；
    Path-calculating element, for the positional information of each Mesh nodes according to surrounding and the position letter of the gateway node Cease, respectively each Mesh nodes around calculating to the path of the gateway node；
    Access path selecting unit, for selecting nearest path from the path as the access for being connected to wireless mesh network Path；
    Network insertion unit, for being connected to the wireless mesh network according to the access path；
    Wherein, the first position information acquisition unit includes：Initial router access unit, for being linked into initial router Node；Position request information transmitting element, please for sending position to the gateway node by the initial router node Seek information；Positional information receiving unit, for obtaining the position of the gateway node return by the initial router node Information；The second place information acquisition unit specifically includes：Beacon frame receiving subelement, for the shifting in the user terminal The beacon frame of each Mesh node broadcasts during dynamic around real-time reception；The beacon frame includes the identity of this Mesh nodes Mark and positional information；Positional information extracts subelement, for according to the beacon frame, obtaining each Mesh nodes of surrounding Positional information.
  5. 5. user terminal as claimed in claim 4, it is characterised in that the Mesh nodes are gateway node or router section Point；
    Wherein, the gateway node is used to connect wireless mesh network and I nternet, and can be provided wirelessly for the user terminal Access function；The router node is used to provide wireless access function for the user terminal, and for forwarding data.
  6. 6. user terminal as claimed in claim 5, it is characterised in that the positional information is to pass through GPS by this Mesh nodes Or base station location obtains.
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