CN105898802A - Cluster-based caching cooperation and sharing method in heterogeneous wireless network - Google Patents
Cluster-based caching cooperation and sharing method in heterogeneous wireless network Download PDFInfo
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- CN105898802A CN105898802A CN201610178424.6A CN201610178424A CN105898802A CN 105898802 A CN105898802 A CN 105898802A CN 201610178424 A CN201610178424 A CN 201610178424A CN 105898802 A CN105898802 A CN 105898802A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/10—Flow control between communication endpoints
- H04W28/14—Flow control between communication endpoints using intermediate storage
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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
- H04W40/18—Communication route or path selection, e.g. power-based or shortest path routing based on predicted events
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
- H04W48/14—Access restriction or access information delivery, e.g. discovery data delivery using user query or user detection
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/18—Self-organising networks, e.g. ad-hoc networks or sensor networks
Abstract
The invention provides a cluster-based caching cooperation and sharing method in a heterogeneous wireless network. With the method, technical problems of low resource utilization rate and slow transmission speed in the existing caching cooperation and sharing method in a heterogeneous wireless network can be solved. The method comprises: clustering is carried out on nodes in a heterogeneous wireless network; a resource table of each node is established; resource table interaction among nodes is carried out; nodes initiate resource requests; a requesting node searches whether a destination node including the requested resources exists among the node, a neighboring node, a same-cluster node and a neighboring-cluster node in the resource table; the requesting node makes a request of resources to the destination node or an external network; and the requesting node receives returned resources, updates the resource table of the node, and initiates a request against for a resource block that may be missing until the data are complete or the request is failed to be done and then the node exits. According to the invention, the resource utilization rate is high and the transmission is done quickly; and the flow costs are reduced. The method can be used for meeting the high-speed resource access requirement in a heterogeneous wireless network.
Description
Technical field
The invention belongs to communication technical field, relate to a kind of cache cooperation sharing method, be specifically related to a kind of based on bunch isomery without
Gauze network cache cooperation sharing method, can be used for providing resource requirements for access at a high speed in heterogeneous wireless network.
Background technology
Wireless communication technology quickly grows, and only supports that speech business is to Generation Mobile Telecommunication System technology from the analogue communication of the first generation
Voice is used the transmission means of datumization, also introduces short message service, develop into the most again G mobile communication
The third generation mobile communication system that the multimedia communication such as cellular communication and the Internet is combined, it is possible to the multimedia moneys such as transmission image
Source, it is provided that web page browsing, videoconference, electricity business's information service, then to forth generation mobile communication technology, there are higher data
Transmittability, lower propagation delay time, lower construction and maintenance cost, higher authentication capability and safety, support are many
Plant the characteristics such as QoS (Quality of Service) grade.The most more conventional network model be Wireless Personal Network (as
Bluetooth), WLAN (such as Wi-Fi), cellular communications network (such as 2G, 3G, 4G) and Ad-Hoc network etc. are multiple
The heterogeneous wireless network that access network coexists.
Along with popularizing of intelligent mobile terminal, quick obtaining resource, shared terminal cache resources and saving expenses of surfing Internet become use
The urgent needs at family.
At present, the most in store more data resource on the intelligent terminal of user, such as: the webpage etc. of audio frequency, video and caching,
And can support that the mode that user shares resource mainly has: by bluetooth data transmission resource, provided by WIFI transmission data
Source, the resource distribution platform of Websites, wherein:
By bluetooth data transmission resource, being to be set up by bluetooth between two terminals to connect, user's manual operation terminal is selected
Select the data resource wanting to share, by transmitting data resources to the other side.By the way of bluetooth data transmission resource, need to use
Family manually operates, and process is relatively complicated, and the scope that bluetooth can cover simultaneously is the least, and transmission may become due to distance
Far terminate, and the transmission speed of bluetooth is relatively slow, even if the distance of two users is close, also cannot improve data resource
Transmission speed.
By WIFI transmission data resource and be similar process by Bluetooth transmission, first have to allow the terminal of shared resource logical
Cross WIFI to be connected in same network, then resource-sharing could be realized by some third-party shareware, operate numerous
Trivial, and also limited by transmission range.
The resource distribution platform of Websites, has provided the user a cyberspace, can be actively by this spatial user
Upload and download oneself resource interested.Although being not only restricted to distance factor, but under this mode, resource must be by user's hands
Moving and go to upload, process is relatively complicated, and user safeguards that the learning cost of such a forum platform account is the highest, therefore simultaneously
Can cause that user's enthusiasm is the highest, resource quantity is not enough, platform is difficult to safeguard；Even if same resource is the most attached
Time in nearly other-end, resource request terminal need nonetheless remain for going to obtain by extranet access resource platform, thus cause need not
Flow, the low and inevitable resource acquisition speed of resource utilization wanted are relatively low.
Except the limitation of above-mentioned Modes of Sharing Resources, the process that the existing network user obtains resource by wireless environment is also deposited
In some inconveniences.In the mode of accessing wirelessly external network, cellular network coverage is relatively broad, and up-to-date
Two-forty cellular network, such as forth generation mobile communication technology 4G, the expense of its cellular traffic costly, if use
Family is currently in use cellular network and accesses outer net, then will consume more cellular traffic and expense；Although it addition, 4G is
Through releasing, but owing to terminal, expenses of surfing Internet and 4G base station coverage rate are low, major part user is still using 2G
Or 3G service, so, when resource upload and download need to be carried out by outer net time, it uploads, the speed downloaded still
Can be limited significantly.Additionally, due to the reasons such as arrearage are limited visiting from outside authority, or portion by operator
The situation that cannot normally access outer net that the reasons such as the service of a certain operator of region-by-region is not covered with cause also happens occasionally.
Summary of the invention
It is an object of the invention to the defect overcoming above-mentioned prior art to exist, it is proposed that a kind of slow based on bunch heterogeneous wireless network
Deposit cooperation share method, be used for solving resource utilization present in existing heterogeneous wireless network cache cooperation sharing method low and
The technical problem that transmission speed is slow.
For achieving the above object, the technical solution used in the present invention is:
A kind of based on a bunch heterogeneous wireless network cache cooperation sharing method, comprise the steps:
Step 1, heterogeneous wireless network Intranet is carried out sub-clustering, obtain some bunches connected by bunch gateway node；
Step 2, newly-built or update the resource table of each node in heterogeneous wireless network；
Mutual resource table between step 3, node, obtains the resource table information of his its node for realizing each node；
Arbitrary Intranet node N in step 4, heterogeneous wireless networkA-i initiates resource request to present networks, and i represents this node
Address；
Arbitrary Intranet node N in step 5, heterogeneous wireless networkA-i in its resource table successively this node, neighbors,
Search whether to there is the destination node comprising request resource with in cluster node and adjacent cluster node, if there is not execution step 8；
Arbitrary Intranet node N in step 6, heterogeneous wireless networkA-i asks resource to destination node, if resource request success
Perform 9；
Arbitrary Intranet node N in step 7, heterogeneous wireless networkA-i is to deleting this invalid money in this node resource table
Source record, and the resource record that this is invalid is notified other nodes, perform step 4；
Arbitrary Intranet node N in step 8, heterogeneous wireless networkA-i initiates resource request by gateway node to outer net, if
Resource request unsuccessfully performs step 11；
Arbitrary Intranet node N in step 9, heterogeneous wireless networkA-i resolves the resource data received, and by basic unit block
It is sequentially written in locally stored, in this node resource table, adds paid-in data resource record simultaneously, and this record is notified
Other nodes；
Arbitrary Intranet node N in step 10, heterogeneous wireless networkA-i checks that the data resource received is the most complete, if not
Completely, step 4 is performed for incomplete part；
Step 11, request terminate.
The present invention compared with prior art, has the advantage that
1, due to the fact that the Intranet to heterogeneous wireless network has carried out sub-clustering, preferentially at the Intranet node of heterogeneous wireless network
Middle lookup resource, when asking resource, override requests jumping figure is minimum and comprises the destination node of Intranet node of this request resource,
Compared with the method directly not considering distance when accessing resource in prior art from outer net acquisition, improve the utilization of resource
Rate, and accelerate request speed and the speed of download of resource.
2, the heterogeneous wireless network Intranet in the present invention need not build extra server, and can be led to by multi-hop
Letter can overcome bluetooth or the restriction of Wifi transmission range, it is not required that user manual operations or by third party software,
Whole process is transparent to user, with low cost, simple to operate.
Accompanying drawing explanation
Fig. 1 is the network scenarios schematic diagram that the present invention uses；
Fig. 2 is the flowchart of the present invention.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
With reference to Fig. 1, the heterogeneous wireless network in the present invention refers to wireless from group Ad-Hoc net and the fusion net of wireless cellular network
Network, the node only opening Ad-Hoc port is referred to as Intranet node, not only opens Ad-Hoc port but also open honeycomb port
Node is referred to as gateway node, and each node of heterogeneous wireless network all can by Ad-Hoc port composition self-organizing network also
By honeycomb port and outbound communication, can control each node honeycomb port open and close so that gateway in network
Node can mutually convert with net interior nodes, furthermore, it is possible to support that new node any time adds network.Therefore, request is worked as
When resource is present in Intranet node, just can obtain this resource from Intranet node and need not move through outer net.After network topology is stable,
3h-BAC (3-hop Between Adjacent Clusterheads) cluster algorithm is utilized to be divided into the Intranet of heterogeneous wireless network
Several by bunch gateway node connect bunch, each bunch is made up of leader cluster node and several member node, when two are adjacent
Node subordinate different bunch time, two neighbors change cluster gateway nodes.Sub-clustering completes between latter two adjacent bunch leader cluster node
Distance be 3 jumpings, member node or a bunch gateway node distance leader cluster node are 1 jumping.Figure exists 5 bunches, NA-i
Representing the numbering of node, i is this address of node, and gray background circle represents that leader cluster node, grid background circle represent bunch
Gateway node, empty circles represents member node.
With reference to Fig. 2, the present invention to realize step as follows:
Step 1: heterogeneous wireless network Intranet is carried out sub-clustering, obtains some bunches connected by bunch gateway node；
After network topology is stable, by the Intranet of heterogeneous wireless network i.e. self-organizing Ad-Hoc network utilisation 3h-BAC (3-hop
Between Adjacent Clusterheads) cluster algorithm is divided into several bunches, and bunch head of each bunch is responsible for the letter of this bunch
Breath, including managing member node and the resource information of gateway node in this bunch, by bunch gateway node communication between adjacent cluster.
Step 2: newly-built or update the resource table of each node in heterogeneous wireless network；
In heterogeneous wireless network, each node is newly-built or update the resource table of this node, especially by sweeping according to oneself having resource
Retouch the resource table that local existing asset creation is as shown in table 1.
In table 1, each entry includes four contents: resource identification, node ID, cell block number and resource path, resource mark
Know the unique mark representing certain resource, can be uniform resource position mark URL, resource number or other characterize this resource
Unique mark of the feature such as title, type and size, resource is uniquely determined by resource identification；This resource institute of node ID record
Belonging to the address of node in heterogeneous wireless network, can be, but not limited to is IP address；Cell block number forms this money for labelling
The presence or absence of the basic unit block in source, 0 represents that the basic unit block not comprising correspondence, 1 expression comprise the most single of correspondence
Unit's block, basic unit block includes but not limited to block of bytes, page block, blockette, there is request resource when requesting node finds
After node, resource is transmitted to requesting node according to basic unit block；This resource conservation of resource path record is in corresponding node
Absolute path.
Table 1 node resource table
| Resource identification | Node ID | Cell block number | Resource path |
| C | 1 | 11110000000 | .../picture/... |
| F | 2 | 010011011110010 | .../movie/... |
| ... | ... | ... | ... |
Step 3: mutual resource table between node, obtains the resource table information of his its node for realizing each node；
Node mutual resource table in heterogeneous wireless network Intranet so that each node obtains this node, neighbors, same to cluster knot
Point and the resource information of adjacent cluster node, concrete steps include:
Step 3.1: in heterogeneous wireless network, each Intranet node broadcasts the resource table of this node, major embodiment to neighbor node
At two aspects: one is to get the resource information in neighbors, and two is the resource information allowing leader cluster node get whole bunch,
The resource information got is for providing selection gist during node requests data resource；
Step 3.2: in heterogeneous wireless network, each Intranet node accepts the message of adjacent node broadcast, solves from broadcast
Analysis resource information, and update in the resource table of this node, form the resource information of neighbors, for leader cluster node, receive
To neighbors resource information be the resource information of this bunch, form bunch resource information；
Step 3.3: the leader cluster node in heterogeneous wireless network broadcasts its resource table to neighbor node, due to the network after sub-clustering
Characteristic, the neighbors of leader cluster node is all the node in same bunch, then in member node in bunch or bunch gateway node
The resource information of this bunch can be received；
Step 3.4: the non-leader cluster node in heterogeneous wireless network includes that bunch member node and a bunch gateway node receive leader cluster node
The broadcast sent, resolves and updates in the resource table of this node；
Step 3.5: for adjacent bunch in heterogeneous wireless network, by mutual bunch of resource information of bunch gateway node, alternately
After completing, the node in bunch obtains the resource information of adjacent bunch, so far, the resource table of each node in heterogeneous wireless network
In comprise this node, neighbors, with cluster node and the resource information of adjacent cluster node.
Step 4: the arbitrary Intranet node N in heterogeneous wireless networkA-i initiates resource request to present networks, and i represents this node
Address；
Any node N in heterogeneous wireless networkAUnique mark of request resource is packaged in request bag and initiates to present networks by-i
Resource request, unique mark of resource may refer to fixed link or filename.
Step 5: the arbitrary Intranet node N in heterogeneous wireless networkA-i in its resource table successively this node, neighbors,
Search whether to there is the destination node comprising request resource with in cluster node and adjacent cluster node, if there is not execution step 8；
Arbitrary Intranet node N in heterogeneous wireless networkA-i in its resource table successively at this node, neighbors, same to cluster knot
Point and adjacent cluster node search whether to there is the destination node comprising request resource, owing to being to search the most in order, it is ensured that
The most optimal destination node every time found, most preferably finger destination node here is minimum, if not to the jumping figure of requesting node
There is this destination node containing request resource and perform step 8.
Step 6: the arbitrary Intranet node N in heterogeneous wireless networkA-i asks resource to destination node, if resource request becomes
Merit performs step 9；
Arbitrary Intranet node N in heterogeneous wireless networkA-i finds the purpose joint comprising request resource in its resource table
Point, i.e. Intranet contain the resource of request, then asks resource to this destination node, if request successful execution step 9.
Step 7: the arbitrary Intranet node N in heterogeneous wireless networkA-i deletes this invalid money in this node resource table
Source record, and the resource record that this is invalid is notified other nodes, perform step 4；
Arbitrary Intranet node N in heterogeneous wireless networkA-i is successfully found the node comprising this request resource, but asks failure,
Therefore, its resource table deleted this invalid resource record and updates the resource table of other nodes, specifically including deletion originally
Invalid record in the resource table of node, notice leader cluster node deletes this invalid record simultaneously, and performs step 4.
Step 8: the arbitrary Intranet node N in heterogeneous wireless networkA-i initiates resource request by gateway node to outer net,
If resource request unsuccessfully performs step 11；
Through above-mentioned steps, in the resource table of this node, still do not find the destination node comprising request resource, this joint
Point sends resource request by gateway to outer net, gateway node asking resource data to outer net, if asking unsuccessfully, performing step
Rapid 11.
Step 9: the arbitrary Intranet node N in heterogeneous wireless networkA-i resolves the resource data received, and by elementary cell
Block is sequentially written in locally stored, adds paid-in data resource record simultaneously, and led to by this record in this node resource table
Know other nodes；
Arbitrary Intranet node N in heterogeneous wireless networkA-i accepts the resource data of Intranet destination node or outer net, resolves and receives
To resource data and be sequentially written in locally stored by basic unit block, update the resource table of this node simultaneously, and notify other
Node, is specifically included in this node resource table and adds paid-in data resource record, and this new resource records is notified
Its leader cluster node.
Step 10: the arbitrary Intranet node N in heterogeneous wireless networkA-i checks that the data resource received is the most complete, if not
Completely, step 4 is performed for incomplete part；
Arbitrary Intranet node N in heterogeneous wireless networkA-i accepts the number of resources passed back from Intranet destination node or outer net
According to, owing to data resource is in transmitting procedure, it is possible that the situation of data block disappearance, after resource accepts to terminate, please
The block of demand file puts in place the most to ask node to check, i.e. checks the cell block number that the resource being written in resource table is corresponding
Whether there is also the position of 0, if existing, the block disappearance of correspondence being described, then for the block of disappearance, performs step 4.
Step 11: request terminates.
The above, the only present invention preferably detailed description of the invention, but protection scope of the present invention is not limited thereto, and appoints
How those familiar with the art is in the technical scope that the invention discloses, the change that can readily occur in or replacement,
All should contain within protection scope of the present invention.Therefore, protection scope of the present invention should be with the protection model of claims
Enclose and be as the criterion.
Claims (5)
1. one kind based on a bunch heterogeneous wireless network cache cooperation sharing method, it is characterised in that comprise the steps:
(1) heterogeneous wireless network Intranet is carried out sub-clustering, obtain some bunches connected by bunch gateway node；
(2) newly-built or update the resource table of each node in heterogeneous wireless network；
(3) mutual resource table between node, obtains the resource table information of his its node for realizing each node；
(4) the arbitrary Intranet node N in heterogeneous wireless networkA-i initiates resource request to present networks, and i represents this node
Address；
(5) the arbitrary Intranet node N in heterogeneous wireless networkA-i in its resource table successively this node, neighbors, with
Cluster node and adjacent cluster node search whether to there is the destination node comprising request resource, if there is not execution step (8)；
(6) the arbitrary Intranet node N in heterogeneous wireless networkA-i asks resource to destination node, if resource request is successfully held
Row step (9)；
(7) the arbitrary Intranet node N in heterogeneous wireless networkA-i deletes the resource note that this is invalid in this node resource table
Record, and the resource record that this is invalid is notified other nodes, perform step (4)；
(8) the arbitrary Intranet node N in heterogeneous wireless networkA-i initiates resource request by gateway node to outer net, if money
Source asks unsuccessfully to perform step (11)；
(9) the arbitrary Intranet node N in heterogeneous wireless networkA-i resolves the resource data received, and suitable by basic unit block
Sequence write is locally stored, adds paid-in data resource record simultaneously, and notified by this record in this node resource table
Other nodes；
(10) the arbitrary Intranet node N in heterogeneous wireless networkA-i checks that the data resource received is the most complete, if the completeest
Whole, perform step (4) for incomplete part；
(11) request terminates.
The most according to claim 1 based on a bunch heterogeneous wireless network cache cooperation sharing method, it is characterised in that step
(1) described in heterogeneous wireless network is carried out sub-clustering, use 3h-BAC algorithm.
The most according to claim 1 based on a bunch heterogeneous wireless network cache cooperation sharing method, it is characterised in that step
(2) resource table described in, each entry in this form includes resource identification, node ID, cell block number and resource road
Footpath.
The most according to claim 1 based on a bunch heterogeneous wireless network cache cooperation sharing method, it is characterised in that step
(3) mutual resource table between the node described in, implementation step is:
3a) the arbitrary net interior nodes in heterogeneous wireless network broadcasts its resource table to neighbor node；
3b) the arbitrary net interior nodes in heterogeneous wireless network resolves the broadcast of the neighbors received and updates its resource table；
3c) leader cluster node in heterogeneous wireless network broadcasts its resource table to a bunch member node；
3d) the non-leader cluster node in heterogeneous wireless network resolves the broadcast of the leader cluster node received and updates its resource table；
3e) adjacent cluster in heterogeneous wireless network is by the resource table part of bunch gateway node neighbour bunch alternately.
The most according to claim 1 based on a bunch heterogeneous wireless network cache cooperation sharing method, it is characterised in that step
(8) the arbitrary Intranet node N in the heterogeneous wireless network described inA-i initiates resource request by gateway node to outer net,
Refer to that gateway node uniquely identifies according to the resource in request bag set up and the communication of main frame in outer net, and get required
Resource.
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Application publication date: 20160824 |