CN101083618A - Wireless mobile station for supporting large-capacity mobile grid network - Google Patents
Wireless mobile station for supporting large-capacity mobile grid network Download PDFInfo
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Abstract
The invention discloses wireless mobile station supported large capacity mobile grid network. Its features are that the wireless mobile station supports mobile grid network topological structure, realizes stabile mobile grid network by node cluster dividing type and real time topology; it uses dimension order route principle and node cluster load share to divide new broadcast area; and it adopts multi channel technique and frequency point resource space diplex technique. The advantages of the invention are that it can solve the conflict between the station mobility and the bandwidth resource space diplex, increase frequency point resource diplex, and ensure the governable, manageability, adaptive performance of the service bandwidth network.
Description
Technical field
The present invention relates to communication technical field, relate in particular to the broadband wireless mobile network system that is operated under the adhoc mode, is a kind of wireless mobile of supporting large-capacity mobile grid network.
Background technology
Usually the Radio Access Network agreement is divided into " three layer of two plane ", and as shown in Figure 2, three layers are meant physical layer, data link layer and network layer; Two planes are data, control plane and management plane.In addition, can also increase the safe floor agreement according to designing requirement.
The network layer design relates generally to topological sum route technology relation.Topology can be divided into rule mesh and scramble network from geometric shape, and representative network comprises: full the Internet, Star network, bus, looped network, mesh, tree type network.Be that the broadband wireless fixed network of representative generally adopts two kinds of fixing topological modes at present with IEEE 802.16: shown in Fig. 3,4, star topology (being called " point-to-multipoint " networking mode again) and " mesh " networking mode.Under the point-to-multipoint networking mode, central station (being called the base station again) plays the control and management and the service switching center effect of the whole network, can not direct communication between the subscriber station.The topology of this networking mode is stable, routing mode determines that central station becomes the key point of network.The wireless frequency resource that all website contentions can not spatial reuse in this network." mesh " networking belongs to the MANET mode of operation, can direct communication between each subscriber station of network.This network possesses the multipath selective power, its network reliability height.Simultaneously, this network can adopt technology such as power control, directional antenna to improve wireless frequency space reuse degree.Move no position between the above-mentioned wireless network stations, network topology is more stable.
Yet, to compare with above-mentioned broadband wireless fixed network, mobile wireless mobile network practical topology changes greatly, generally can't adopt stable topological relation to describe.Present broadband wireless mobile network has adopted the networking mode of " fix and combine with mobile phase ", possesses the broadband wireless fixed network central station and the mobile subscriber station mixed networking mode of stable topology relation that is:.Mobile subscriber station can be realized handover between the Fixed Cellular Network central station, but can't realize all websites in the network, comprises the mobility of central station.
Present mobile network mainly adopts the routing algorithm of " topology is irrelevant ".Routing algorithm mainly acts on and being summed up as: Topology Discovery and maintenance, Route Selection.The mobile radio network practical topology changes and limited bandwidth, and its Routing Protocol is divided into table according to the Topology Discovery mode and drives (TableDriven Protocols) and on-demand routing protocol (Source-initiated On-demandProtocols); Can divide into plane formula Routing Protocol (FlatProtocols) and sub-clustering formula Routing Protocol (Clustered Protocols) again according to topological structure.In general, the leading indicator of the algorithm network routing of the no fixed topology of measurement is: topological independence, fast convergence, routing validity.
Broadband wireless mobile network's shortcoming is at present: the mobility of network and the contradiction between the bandwidth availability ratio.Therefore, the broadband wireless network that adopts fixed base stations to combine with mobile subscriber station has on the one hand been sacrificed the mobility of network; On the other hand, adopt the mobile radio network of methods such as topology control,,, can't ensure reliability, manageability and the professional suitability of bandwidth resources owing to the uncertainty of its channel resource allocation though support the mobility of its website.
Summary of the invention
The purpose of this invention is to provide a kind of wireless mobile of supporting large-capacity mobile grid network.This mobile radio station can make full use of the frequency resource of cordless communication network, when distributing the frequency resource, guarantees may command, manageability and the professional suitability of broadband network.
For achieving the above object, the invention provides a kind of support large-capacity mobile grid network wireless mobile, so that realize that the frequency resource space is multiplexing, simultaneously, the routing algorithm and the multichannel scheme that adapt with this topology have been proposed.When the website in the mesh relatively moves, thereby realize dynamically adjusting maintenance mesh topology by topology control.
Mobile grid network is provided with at least two wireless mobile points, and its key is:
A, described wireless mobile point are supported the mobile grid network topological structure, realize stable mobile grid network by node sub-clustering mode and topology maintenance in real time;
B, described wireless mobile point adopt dimension preface route principle and the node cluster load sharing that adapts with mobile grid network, dynamically divide the broadcast domain of updating network state, reduce the route maintenance amount;
Multichannel technology and frequency resource space multiplex technique that C, described wireless mobile point adopt adaptive mess net topology and QoS to require.
The principle of described node sub-clustering mode and topology maintenance in real time is;
A, described wireless mobile point are supported the mobile grid network of sub-clustering, " node cluster " of mesh is made up of the website in close geographical position, belong to the identical topological node of virtual net graticule mesh with the website of cluster, the website of each bunch is mapped to the corresponding topological node of mesh;
B, described wireless mobile point have been safeguarded stable mesh topology by topology control, this mesh topology is the average distance between adjacent " node cluster " and the function of network communication capacity, topology control is calculated " node cluster distance " in real time and is finished the mesh Topological Mapping, has safeguarded stable mesh topology;
The topology control of C, described wireless mobile point is to realize that by transmitting power control and azimuth adjustment network management plane is supported topological control procedure;
Wireless mobile adopt dynamically dimension preface route principle, bunch in website load sharing strategy and dynamically divide the updating network state broadcast domain:
It is the addressing scheme of the node cluster on basis that A, described wireless mobile point adopt X-Y dimension preface route, and the website that node cluster inside has different Z dimensions saves as load sharing in the path, and dimension preface route should adapt with network topology change;
B, described wireless mobile point are dynamically divided the broadcast domain of updating network state, and this zoning scope is determined by the interstitial content and the topological structure of this intra-zone; Topological structure considers to connect between the website in the real network institute's compositing area shape; The zone boundary node state need be broadcasted to the whole network, and the node status information of intra-zone is broadcasted in the one's respective area, thereby suppresses the broadcast storm of routing addressing and routing update.
Described mesh realizes that multichannel technology and frequency resource space multiplex technique are:
A, be a plurality of channel resources with wireless frequency resource division, this channel classification is: preassignment channel, competitive channel and bunch in channel reservation;
B, realize multi-hop communication between the node cluster by the preassignment channel, it is multiplexing to form the cellular frequency resource space of district group realization by available channel area, has avoided the conflict between institute's allocated channel;
C, realize multi-hop communication between the node cluster adopting the competition of distributed scheduling algorithmic approach to use this channel resource by competitive channel;
D, use to reserve bunch in channel realize communicating by letter between the node cluster domestic site, use this channel resource by distributed or the competition of centralized scheduling algorithm.
Remarkable result of the present invention is: solved the mobility of wireless mobile and the contradiction between the network bandwidth utilance.Thereby the fixed allocation by adopting channel for the control of key, manage and the business that has service quality guarantee to require provides stable channel resource.Simultaneously, utilized the competitive channel of high bandwidth utilization, the business that requires for no service quality guarantee provides channel resource.The present invention has realized reliability, manageability and the professional suitability of broadband wireless mobile network's bandwidth resources.
Description of drawings
Fig. 1 is the realization flow figure of large-capacity mobile grid network;
Fig. 2 is prior protocols software architecture figure;
Fig. 3 is existing point-to-point networking topological diagram;
Fig. 4 is existing infinite network net topology figure;
Fig. 5 is a mesh topological structure schematic diagram of the present invention:
Fig. 6 is an X-Y dimension preface routing diagram of the present invention;
Fig. 7 is the Z dimension node cluster load sharing figure in the multi-hop forward-path of the present invention;
Fig. 8 is route of the present invention and topology " situation " figure;
Fig. 9 is the Qu Quntu that 9 channels of network of quadrilaterals graticule mesh are formed;
Figure 10 is a frequency topology controlling schemes flow chart.
Embodiment
Below in conjunction with the drawings and specific embodiments the present invention is described in further detail,
Shown in Fig. 5,6,7,8,9: a kind of support large-capacity mobile grid network wireless mobile so that realize that the frequency resource space is multiplexing, simultaneously, has proposed the routing algorithm that adapts with this topology.When the website in the mesh relatively moves, thereby realize dynamically adjusting maintenance mesh topology by topology control.
Mobile grid network is provided with at least two wireless mobile points, and its key is:
A, described wireless mobile point are supported the mobile grid network topological structure, realize stable mobile grid network by node sub-clustering mode and topology maintenance in real time;
B, described wireless mobile point adopt dimension preface route principle and the node cluster load sharing that adapts with mobile grid network, dynamically divide the broadcast domain of updating network state, reduce the route maintenance amount;
Multichannel technology and frequency resource space multiplex technique that C, described wireless mobile point adopt adaptive mess net topology and QoS to require.
The principle of described node sub-clustering mode and topology maintenance in real time is;
A, described wireless mobile point are supported the mobile grid network of sub-clustering, " node cluster " of mesh is made up of the website in close geographical position, belong to the identical topological node of virtual net graticule mesh with the website of cluster, the website of each bunch is mapped to the corresponding topological node of mesh;
B, described wireless mobile point have been safeguarded stable mesh topology by topology control, this mesh topology is the average distance between adjacent " node cluster " and the function of network communication capacity, topology control is calculated " node cluster distance " in real time and is finished the mesh Topological Mapping, has safeguarded stable mesh topology;
The topology control of C, described wireless mobile point is to realize that by transmitting power control and azimuth adjustment network management plane is supported topological control procedure;
Wireless mobile adopt dynamically dimension preface route principle, bunch in website load sharing strategy and dynamically divide the updating network state broadcast domain:
It is the addressing scheme of the node cluster on basis that A, described wireless mobile point adopt X-Y dimension preface route, and the website that node cluster inside has different Z dimensions saves as load sharing in the path, and dimension preface route should adapt with network topology change;
B, described wireless mobile point are dynamically divided the broadcast domain of updating network state, and this zoning scope is determined that by the interstitial content and the topological structure of this intra-zone topological structure considers to connect between the website in the real network institute's compositing area shape.The zone boundary node state need be broadcasted to the whole network, and the node status information of intra-zone is broadcasted in the one's respective area, thereby suppresses the broadcast storm of routing addressing and routing update.
Described mesh realizes that multichannel technology and frequency resource space multiplex technique are:
A, be a plurality of channel resources with wireless frequency resource division, this channel classification is: preassignment channel, competitive channel and bunch in channel reservation;
B, realize multi-hop communication between the node cluster by the preassignment channel, it is multiplexing to form the cellular frequency resource space of district group realization by available channel area, has avoided the conflict between institute's allocated channel;
C, realize multi-hop communication between the node cluster adopting the competition of distributed scheduling algorithmic approach to use this channel resource by competitive channel;
D, use to reserve bunch in channel realize communicating by letter between the node cluster domestic site, use this channel resource by distributed or the competition of centralized scheduling algorithm.
Its operation principle is as follows:
Below in conjunction with the drawings and specific embodiments the present invention is described in further detail:
As shown in Figure 1: a kind of wireless mobile of large-capacity mobile grid network of supporting is connected to form by the mobile site equipment wireless that possesses Business Processing and forwarding capability, and its method of work and teaming method are made up of the following step:
At first, default mesh parameter: open first station point, by first station point configuration predetermined radio cell network topological parameter, according to the geographical position polygonal mesh net topology that network adopted is preset, and distance between the mesh topological node is set, according to the configuration structure of described polygonal mesh net topology, first station point is set at the Base Serial Number (X of mesh topological node
0, Y
0, Z
0), i.e. the address of node cluster, wherein X
0, Y
0Be that horizontal stroke, the ordinate of topological node on the geographical position arranged Z in the network
0It is the sequence numbering of number identical site apparatus of topological node;
As shown in Figure 5: the polygonal mesh net topology structure of employing is the network of quadrilaterals graticule mesh, the Base Serial Number (X of first station point
0, Y
0, Z
0) be (0,0,
0); The range size of topological node determines that by transmitting power the coverage of adjacent topological node is overlapped.
Realize stable mobile grid network by node sub-clustering mode and topology maintenance in real time.
Shown in Fig. 8,9: secondly, distribute radio channel resource: the frequency that wireless network is worked is divided into a plurality of sub channel resource according to modes such as time-division, sign indicating number branch or frequency divisions, described channel resource belong to respectively preassignment channel resource, competitive channel resource, bunch in three big classes of channel reservation resource, wherein every type channel resource is respectively arranged with at least one channel;
Present embodiment is selected the wireless frequency of 400MHz and is adopted the frequency division multiplexing mode, only consider the co-channel interference factor, the individual channel width is 200KHz, 11 channel resources are set in this network of quadrilaterals graticule mesh: wherein the preassignment channel resource comprises that the 1st, 2,3,4,6,7,8,9 section channel adopts 400 altogether, 000KHz～401, the 800KHz frequency range; The competitive channel resource comprises that the 10th section channel adopts 401,800KHz～402,000KHz frequency range; The channel reservation resource comprises that the 11st channel adopts 402,000KHz～402,200KHz frequency range in bunch; Distribution principle is:
Form a node cluster by geographical position all websites in topological node of mesh, all interior websites of node cluster belong to the same topological node of mesh, and enjoy I class channel resource jointly, be used for the message transmission between the website of same node point bunch inside, by the dispatching algorithm support, the preassignment channel resource is used in its each website competition;
Each website in the described node cluster, share and use the preassignment channel resource, this preassignment channel resource is used for the communication between the node of different node clusters, take the node cluster as topological node unit, adopt the multi-hop communication between the preassignment channel resource realization node cluster between each node cluster, this resource adopts fixed allocation to be assigned to different node clusters by network management system, and described network management system is stored in all websites;
Each website in the described node cluster is also shared the communication between the node of using competitive channel resource, this competitive channel resource also to be used for different node clusters; Be topological node unit with the node cluster promptly, adopt the multi-hop communication between the competitive channel resource realization node cluster between each node cluster, support that by the distributed scheduling algorithm competitive channel resource is used in competition between the node cluster;
Channel reservation resource in all websites in node cluster are enjoyed bunch jointly is used for the message transmission between the website of same node point bunch inside, by the dispatching algorithm support, and channel reservation resource in its each website competition is used bunch;
The multichannel technology and the frequency resource space multiplex technique that adopt adaptive mess net topology and QoS to require.
The 3rd, wireless network is formed: other website start, according to itself and the described first station point of step 1 or other distance of the adjacent sites of success communication, and obtain according to the described wireless channel parameter of step 2, and then determine its topology location in this wireless mesh network according to the geographical position, obtain corresponding topological node numbering;
As identical with the initiator geographical position then can obtain topological node numbering (0,0,
1), adjacent with the initiator geographical position then can obtain topological node numbering (1,0,
0)
As shown in figure 10: the 4th, dynamically adjust the topological node numbering of website: when the generation website moves and is positioned at other topological node positions of mesh, when the mesh topology perhaps taking place because of topology optimization changing, need to upgrade the topology numbering of respective site; The topology numbering is that website independently upgrades selection, gets topological node numbering immediate with it by the geographical position; Its process is, selects the numbering of topological node earlier, just website bunch number (X, Y), again bunch in select bunch sequence number Z;
When newly-increased website or website move, adopt wireless distance finding or measure distance with this website neighborhood node in conjunction with the satellite fix mode; According to itself and the described first station point of step 1 or other distance of the adjacent sites of success communication, and obtain according to the described wireless channel parameter of step 2; And then determine its topology location in this wireless mesh network according to the geographical position, obtain corresponding two-dimensional topology node serial number, promptly bunch number, as bunch number (1,1); Judge whether this topological node has had other websites, promptly whether have node cluster to exist, thereby obtain the node cluster sequence number, as the topology numbering (0,1,
0)Website move to topology numbering (1,1,
0)Site location, then can obtain (1,1,
1)Topology numbering.
The 5th, dynamically adjust mesh: or when the website increase appears in the wireless network, when the minimizing website moves, network capacity and communication coverage relation are changed, need dynamically to adjust the mesh topology, be criterion promptly with network capacity and communication coverage, dynamically adjust the topology of network, and distance between the mesh topological node;
Adopt the dimension preface route principle and the node cluster load sharing that adapt with mobile grid network, dynamically divide the broadcast domain of updating network state, reduce the route maintenance amount;
As shown in Figure 5: topology can be the exchange between quadrilateral mesh net, hexagonal mesh net or the network of triangle graticule mesh, also can be the adjustment of mesh magnitude range, transmitting power by each wireless site determines that described wireless mobile point possesses the Radio Terminal Function and the professional router feature of transmitting of Business Processing simultaneously.
As shown in figure 10: regularly obtain the distance between each adjacent node, calculate the average distance of each neighborhood node, make set mesh topology become the function of node cluster average distance and network capacity, thus real-time servicing mesh topology; Judge again whether actual node bunch topology correctly is mapped to during default mesh opens up, if correct mapping then the timer cycle that resets repeats this adjustment process, if would not do not have correct mapping then adjust respective nodes bunch topological node numbering; Reset to timer, periodically repeat above-mentioned adjustment process.
Periodically obtain network capacity and network topology nodal distance information, thereby realize the dynamic adjustment of network topology.At first need to calculate the average distance D of each neighborhood node:
Wherein: (X has K website, d in Y) to node cluster
(i, j, k)For bunch in site apparatus numbering (X, Y,
Z) and the neighborhood node cluster between distance value; M * N is a topological node number of clusters order in the network.Again by optimizing the renewal average distance D that obtains the neighborhood node
Opt:
D
opt＝{D|T
max}，
In the following formula: T
MaxExpression Internet traffic maximum is as optimal conditions.
After the above topology adjustment is finished, judge again whether actual node bunch topology correctly is mapped to during new mesh opens up; If respective nodes bunch topological node numbering is then adjusted in incorrect mapping; After above-mentioned adjustment is finished, restart timer with the adjustment of property performance period.
Shown in Fig. 6,7: the 6th, route is used: the inner website of realizing of node cluster is to the direct communication between the website, and communicate by letter between the node of different node clusters, then adopt the node cluster addressing scheme of X-Y dimension preface route for the basis, promptly tie up preface addressing and self adaptation addressing system; In multihop path, the inner a plurality of nodes of node cluster have different Z dimension coordinates, only as the load sharing website;
As shown in Figure 8: the 7th, route discovery and maintenance: close between the website by broadcasting and intercept the initial routing iinformation of acquisition.Route maintenance adopts dynamic two-stage partition management mechanism, determine the sub-network scale that this is regional according to intra-zone topology and number of nodes, a sub-internal nodes of network can obtain the connection status of inner each node of its sub-network, and the boundary condition information of other sub-networks is arranged.Because the time variation of mobile network's topology is divided sub-network according to the variation of topology.
By the broadcast area of division topological constraints lastest imformation, thereby realize stagewise Topology Management mechanism.The division of its routing update broadcast area not only needs consideration of regional interior nodes number of clusters amount, also needs to consider simultaneously its topology.Consider real site existence and operating state, example has gone out the practical topology that some topological node of mobile grid network does not have wireless mobile among Fig. 8, and the vacancy of these topological nodes has influenced actual route.Wherein topology is comprised a recessed collection of topology for the zone shown in Fig. 8 solid line has comprised the zone shown in topological convex set Fig. 8 dotted line.Divide the alternate route that broadcast area can be avoided the intra-zone engineering noise in conjunction with the actual topology of network.
The present invention adopts dynamic topology to upgrade broadcast area, and the station state limit information of intra-zone is broadcasted in the one's respective area.Thereby suppress connection status and upgrade the broadcast storm of generation and invalid routing addressing.
Claims (4)
1, a kind of wireless mobile of supporting large-capacity mobile grid network need be provided with at least two wireless mobile points during networking work, it is characterized in that:
A, described wireless mobile point are supported the mobile grid network topological structure, realize stable mobile grid network by node sub-clustering mode and topology maintenance in real time;
B, described wireless mobile point adopt dimension preface route principle and the node cluster load sharing that adapts with mobile grid network, dynamically divide the broadcast domain of updating network state;
Multichannel technology and frequency resource space multiplex technique that C, described wireless mobile point adopt adaptive mess net topology and QoS to require.
2, a kind of wireless mobile of supporting large-capacity mobile grid network according to claim 1 is characterized in that: the principle of described node sub-clustering mode and topology maintenance in real time is;
A, described wireless mobile point are supported the mobile grid network of sub-clustering, " node cluster " of mesh is made up of the website in close geographical position, belong to the identical topological node of virtual net graticule mesh with the website of cluster, the website of each bunch is mapped to the corresponding topological node of mesh;
B, described wireless mobile point have been safeguarded stable mesh topology by topology control, this mesh topology is the average distance between adjacent " node cluster " and the function of network communication capacity, and topology control is calculated " node cluster distance " in real time and also finished the mesh Topological Mapping;
The topology control of C, described wireless mobile point is to realize that by transmitting power control and azimuth adjustment network management plane is supported topological control procedure.
3, a kind of wireless mobile of supporting large-capacity mobile grid network according to claim 1 is characterized in that: adopt dynamically dimension preface route principle, bunch in website load sharing strategy and dynamically divide the updating network state broadcast domain:
It is the addressing scheme of the node cluster on basis that A, described wireless mobile point adopt X-Y dimension preface route, and the website that node cluster inside has different Z dimensions saves as load sharing in the path, and dimension preface route should adapt with network topology change;
B, described wireless mobile point are dynamically divided the broadcast domain of updating network state, this zoning scope is determined by the interstitial content and the topological structure of this intra-zone, topological structure considers to connect between the website in the real network institute's compositing area shape, the zone boundary node state need be broadcasted to the whole network, and the node status information of intra-zone is broadcasted in the one's respective area.
4, a kind of wireless mobile of supporting large-capacity mobile grid network according to claim 1 is characterized in that: described mesh realizes that multichannel technology and frequency resource space multiplex technique are:
A, be a plurality of channel resources with wireless frequency resource division, this channel classification is: preassignment channel, competitive channel and bunch in channel reservation;
B, realize multi-hop communication between the node cluster by the preassignment channel, it is multiplexing to form the cellular frequency resource space of district group realization by available channel area;
C, realize multi-hop communication between the node cluster adopting the competition of distributed scheduling algorithmic approach to use this channel resource by competitive channel;
D, use to reserve bunch in channel realize communicating by letter between the node cluster domestic site, use this channel resource by distributed or the competition of centralized scheduling algorithm.
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| CN101827022B (en) * | 2010-03-19 | 2012-10-17 | 重庆大学 | Low-voltage power line communication network constructing method for power meter reading system |
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| CN115412928A (en) * | 2021-05-26 | 2022-11-29 | 中国移动通信集团浙江有限公司 | Method and device for identifying flower arrangement base station based on space technology |
| CN115412928B (en) * | 2021-05-26 | 2023-08-01 | 中国移动通信集团浙江有限公司 | Flower arrangement base station identification method and device based on space technology |
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