CN102594926B - Heterogeneous wireless peer-to-peer (P2P) network file sharing system and file transmission acceleration method - Google Patents
Heterogeneous wireless peer-to-peer (P2P) network file sharing system and file transmission acceleration method Download PDFInfo
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Abstract
The invention discloses a heterogeneous wireless peer-to-peer (P2P) network file sharing system and a file transmission acceleration method. In a heterogeneous wireless fusion network access environment, factors such as an access network type, a terminal node downloading rate, an inter-node network distance and round-trip time are comprehensively combined for the characteristics of a fusion network, and a seed node is selected by utilizing an optimization theory in engineering to provide an acceleration method for a file sharing service of a terminal on the basis of an extended P2P-Bittorrent protocol. A proper seed node is selected, and a network service with high data traffic and a heavy load is transferred into an idle network, so that the load balance of the whole network structure is realized, and the resource efficiency of a plurality of heterogeneous fusion networks is optimized.
Description
Technical field
The present invention relates to multi-module radio terminal under multiple isomery UNE overlay environment, carry out shared file system and accelerate document transmission method, refer more particularly to based on P2P-Bittorrent agreement, be applicable to WLAN, 3G/LTE, Ad hoc network and following various novel radio access network shared file system and accelerate document transmission method.
Background technology
Wireless mobile access technology development is in recent years swift and violent, the WLAN (wireless local area network) being representative with 802.11 series (WLAN), with technology large-scale application such as CDMA2000, WCDMA and TD-SCDMA 3G/HSPA/LTE that is representative, and the continuous research and development of self-organizing network Ad hoc technology, following mobile Internet will be with multiple access network and the open heterogeneous wireless network system of depositing.
Main body business based on mobile Internet has been main turn to Various types of data business by speech business, and file-sharing is as the basic application of distributed system, widely uses in the Internet.And come from the P2P technology of the Internet, lucky self-organizing, the network topology that can adapt to mobile Internet is various, the feature of the dynamic that accesses terminal, and the P2P application therefore based on mobile Internet business is also in the mobile interchange key technology of carrying out data service off the net.
Mobile interchange data service feature off the net comprises data content updating decision, size of data is widely distributed, user group's dynamic is strong, switch more frequent, and under heterogeneous wireless multiple networks fusion environment, owing to comprising multiple network, overlap mode between network is also diversified, any number of application scenarios overlapping is in any way applicable in order to file-sharing model can be made, the existing P2P shared file system based on Bittorrent agreement is then due to its favorable expandability, distribution of document speed is fast, node is uploaded to download and is accepted or rejected balanced and applied referenced by many mobile P 2 Ps and adopt.
Traditional Bittorrent carrys out shared file by torrent file, and it comprises 4 parts: Tracker server, torrent file, the seed node seed having the backup of complete shared file and requirement obtain the peer node of file.Wherein, Tracker server selects effective peer set of node to be very crucial, and particularly under mobile Internet, mobile terminal access state dynamically adds and exits, and in order to safeguard the state information of dynamic node, can increase the burden of Tracker server; If consider that carrying out logical place according to terminal node network topology structure hives off, prioritizing selection group interior nodes, but because meshed network topology is not corresponding with physical location topology, if the near node of network topology middle distance is apart from each other in physical location, the stability of this node also can reduce, simultaneously to the transfer of data burden increasing mobile core network, above method all not can solve the Effective selection of Tracker to node, and shared speed is improved.
File-sharing speed is improved under the applied environment how various at above network, node dynamic is strong, and for the lower mounted mass of terminal node, consider in node downloading rate, neighbor node uploading rate, network distance, access network type, the factor such as RTT compromise two-way time, file-sharing performance under whole isomery fusion multi-network environment is got a promotion and seems very necessary, and be used widely in the data service that can strengthen at other.
Summary of the invention
Technical problem to be solved by this invention is the defect and the deficiency that overcome technical method described above, under heterogeneous wireless UNE access environment, based on P2P-Bittorrent agreement, a kind of heterogeneous wireless P2P network file shared system is provided and accelerates document transmission method.
For solving the problems of the technologies described above, the invention provides a kind of heterogeneous wireless P2P network file shared system, it is characterized in that, comprise Tracker server, mobile agent node, general mobile terminal;
Described Tracker server, comprises interactive controlling module, Peer administration module, optimum choice module and nework analysis module;
Described interactive controlling module: for the Signalling exchange between described mobile agent node, general mobile node, described Signalling exchange is based on the Bittorrent agreement of expansion; The Bittorrent agreement of described expansion comprises extended field nettype, and it is described as " client access network type ", rttime, and it is described as " client is to RTT two-way time of mobile agent node point ";
Described Peer administration module: for realizing mobile agent node in whole distributed P 2 P network, the discovery of general mobile node, statistics and record, set up the real-time Peer MIB of unified whole network, carry out the Peer information source of seed node selection as optimum choice module;
Optimum choice module: for selecting the seed node list of the node adapting to current request file-sharing business most, maximizes file-sharing speed;
Described nework analysis module: for timing acquisition mobile agent node reporting respective network site, specifically comprise IP address, network description, particular geographic location descriptor; RTT value between mobile agent node in the IP address that the general mobile node of timing acquisition reports, gateway address information and net; And for above information, analyze the logical topological structure of each distributed P 2 P network, statistics mobile node RTT value end to end, is convenient to optimum choice module and calculates each optimal value with reference to seed node;
Described mobile agent unit comprises location management module and access control module;
Described location management module: mobile agent unit, as the Centroid of network cluster collection, regularly reports the network site state of self, comprises IP address, network description, particular geographic location descriptor to Tracker server unit; Particularly upgrade network cluster collection state when own net interior nodes network site changes.
Described access control module: network insertion and the state of being responsible for other nodes in network cluster collection, and when network site change or access way change occur other nodes, notice location management module carries out statistical information renewal.
Described general mobile terminal unit comprises session management module, Access Management, Peer information maintenance unit and data transmission module;
Described session management module: be responsible for and Tracker server, carry out Signalling exchange between mobile agent, signaling is based on the improvement of Bittorrent agreement, general Bittorrent software can not only be supported, also add network insertion type, between network site description and mobile agent, RTT expands and identifies;
Described Access Management: be responsible for the mode obtaining current mobile terminal network insertion, and submit session management module to, fill nettype and netdescription extend information; Timing acquisition and mobile agent node RTT two-way time simultaneously, fills rttime extend information;
Described Peer information maintenance unit: for safeguarding the information of the seed node list that this terminal node and Tracker return, as peer_id, ip address, port numbers, task status; And be responsible for setting up data cube computation based on Transmission Control Protocol with each seed node, be convenient to data transmission module from seed node downloaded resources;
Described data transmission module: be responsible for sharing of concrete resource data, comprises from seed node downloading data and self is as seed node uploading data.
Preferably, Signalling exchange between described mobile agent node and general mobile node, comprise the shared file request message of general mobile node, the position feedback message of mobile agent node and general mobile node and heartbeat feedback message, general mobile node network insertion kind of message.
Further, described optimum choice module, realize as Tracker server unit sharing the nucleus module accelerated, adopt the optimum target constraint function that the seed node of multi-parameter is chosen, select the seed node list of the node adapting to current request file-sharing business most; Optimum target constraint function is:
i=1,2......N, wherein N is can for the seed node number of optimum choice, P
ibe the seed node optimal value that i-th reference is chosen, A
ibe access network type normalized value, the S of the seed node that i-th reference is chosen
ibe the uploading speed normalized value of the seed node that i-th reference is chosen, RTT
ifor normalized value two-way time of the general mobile node that the seed node chosen for i-th reference is shared to demand file,
for the network insertion type normalized value of the general mobile node that demand file is shared.Above normalized value is reference value according to the international standard parameter of different network type.
Further, when selecting seed node list, the network scenario of general internodal RTT value two-way time then with concrete that seed node uploading rate S and demand file are shared is relevant, and concrete consideration is as follows:
When S is large, RTT hour, now show with reference to seed node access network band roomy, and general mobile node (hereinafter referred to as the requesting node) network distance shared with demand file is short, the optimal value A of this reference seed node is large, as prioritizing selection seed node;
When S is little, when RTT is large, now show with reference to seed node access network bandwidth little, and it is long with requesting node network distance, the data flow formed is easily by long-range network environmental impact, and cannot reach the effect that file-sharing is accelerated, this type of seed node should abandon;
When S is little, RTT hour, shows that this type of node access networks network bandwidth is low, but short with requesting node network distance, easily finds.This type of seed node should as optional node, depending on actual conditions.When preferred seed nodes cannot reach the number requirement of requesting node, this type of optional node can be connected.
When S is large, when RTT is large, show that this type of node access networks network bandwidth is high, but far away with requesting node network distance.A kind of mechanism newly is now utilized " in bunch, to propagate " mode, requesting node notice mobile agent node is connected with far-end seed node, Gains resources information, and is downloaded by mobile agent node, then distribute in the net of requesting node place, final requesting node gets resource requirement.
The Bittorrent agreement of described expansion also comprises extended field numwant, and it is described as " client wishes the number of other seed node obtained from Tracker server ", netdescription, and it is described as " client place network detailed description ".
The present invention also provides a kind of acceleration document transmission method based on above-mentioned heterogeneous wireless P2P network file shared system simultaneously, it is characterized in that, comprises the following steps:
Step one, general mobile terminal node are carried out alternately as client and Tracker server, propose resource download request; By the Bittorrent agreement of expansion, by the access network type of self, network description information, with the Parameter transfer such as mobile agent node R TT to Tracker server, as the foundation of follow-up selected seed node, when above parameter changes, timing feedback is to Tracker server;
Step 2, Tracker server process client-requested, inquire about the seed node information of whole network, seed node information is by Tracker server statistics and store with list catalogue, Preliminary screening goes out the seed node list conformed to client-requested resource, this type of seed node information is saved in historical query record, so that provide share service for the same request of other clients simultaneously;
Step 3, seed node list according to Preliminary screening, the optimum choice module of Tracker server is with reference to candidate seed nodes list, by the calculated value of nework analysis module to network distance between client and candidate seed nodes, in conjunction with optimization selection strategy, filter out the candidate seed list for client optimum further, and send to client;
Step 4, client receive optimum seed node list, and are connected with these seed node, carry out the lasting download of resource requirement;
If step 5 is in downloading process, client cannot be connected to this seed node, and client feedback message is to Tracker server, Tracker server is according to step 2, three, again screen optimum seed node list, and send to client, upgrade Peer node statistics information simultaneously;
Step 6, client upgrade the downloading process that resource requirement is carried out in optimum seed node list, and are connected with these seed node, re-start the lasting download of resource requirement.
The present invention compared with prior art, has the following advantages:
(1). the present invention adopts traditional centralized architecture, only needs to increase mobile agent node and improves acceleration function.Keep mobile interchange " thin-client " off the net characteristic, to mobile terminal performance without particular/special requirement, large resource overhead can not be brought to mobile terminal under the prerequisite of stable raising file-sharing performance;
(2). the present invention combines the various features parameter for heterogeneous network for Tracker server selected seed facility strategy, configurable flexibly, independently becomes module, can change flexibly under different application scenarioss;
(3). present invention improves over and backward compatible Bittorrent agreement, be convenient to mobile terminal to network site, the isoparametric acquisition of access network type, and correctly can resolve with Tracker server.
Can be there is the overlapping fusion in any way of any number of network in scene proposed by the invention, and have nothing to do with concrete network bottom layer technology, is applicable to existing i.e. following various new wireless networks access, has extensibility.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, technical scheme of the present invention is further described in detail.
Fig. 1 is heterogeneous wireless P2P network file shared system network architecture diagram of the present invention.
Fig. 2 is the functional block diagram of Tracker server in the present invention, mobile agent node and general mobile node.
Fig. 3 is the mobile agent node selection model schematic in the present invention;
Fig. 4 is the workflow diagram that in the present invention, mobile terminal node carries out file-sharing acceleration.
Embodiment
Fig. 1 describes the follow-on centralized mobile P 2 P network Organization Chart of the present invention.Heterogeneous network type described in figure comprises WLAN, 3G/LTE, Ad hoc network, fully can represent the wireless network access form of current popular.This centralized P2P network architecture has distributed P 2 P feature simultaneously, is connected in centralized architecture by the node in full distributed P2P network by mobile agent node.This network comprises Tracker server node, mobile agent node and general mobile node, and the general mobile node that mobile agent node connects forms a network cluster collection jointly.
Wherein, Tracker server node provide neighbor node index for the general mobile node in centralized P2P network and choose information, routing iinformation, P2P node find, network topology statistics and the management function of multicast group.
Mobile agent node is acted on behalf of as the network insertion of general mobile node, understands in long-term existence and residing network, and keeps stable network site and presence, analyzes the reference point of network topology as Tracker server node;
General mobile node is connected in respective distributed P 2 P network by mobile agent node, to Tracker server node timing feedback self network insertion type and two-way time RTT, be convenient to Tracker server node optimum option seed node strategy, carry out file-sharing acceleration.
Fig. 2 describes the file-sharing acceleration model in the present invention, relates to the functional block diagram of Tracker server, mobile agent, general mobile terminal.Below each module of each unit is elaborated.
Tracker server unit, interactive controlling module: be responsible for and mobile agent node, Signalling exchange between general mobile node, based on the Bittorrent agreement of expansion; Comprise the shared file request message of general mobile node, the position feedback message of mobile agent node and general mobile node and heartbeat feedback message, general mobile node network insertion kind of message etc.Above message all carries out expansion encapsulation with HTTP GET message.
Peer administration module: complete the discovery of the mobile agent node in each distributed P 2 P network under whole centralized P2P network, generally mobile node, statistics and record, set up the real-time Peer MIB of unified whole network, carry out the Peer information source of seed node selection as optimum choice module.
Optimum choice module: realize as Tracker server unit sharing the nucleus module accelerated, adopt the optimum target constraint function that the seed node of multi-parameter is chosen, select the seed node list of the node adapting to current request file-sharing business most, maximize file-sharing speed.Optimum target constraint function is:
i=1,2......N, wherein N is can for the seed node number of optimum choice, P
ibe the seed node optimal value that i-th reference is chosen, A
ibe access network type normalized value, the S of the seed node that i-th reference is chosen
ibe the uploading speed normalized value of the seed node that i-th reference is chosen, RTT
ifor normalized value two-way time of the general mobile node that the seed node chosen for i-th reference is shared to demand file,
for the network insertion type normalized value of the general mobile node that demand file is shared.Above normalized value is reference value according to the international standard parameter of different network type.
Because the access network bandwidth of WLAN, 3G/LTE, Ad hoc network exists notable difference, when calculating is in the optimal value of the seed node under above three class networks, by access network types value A
i,
as dominating coefficient index.And seed node uploading rate S, relevant with the network scenario of general internodal RTT value two-way time then with concrete that demand file is shared, concrete consideration is as follows:
When S is large, RTT hour, now show with reference to seed node access network band roomy, and general mobile node (hereinafter referred to as the requesting node) network distance shared with demand file is short, the optimal value A of this reference seed node is large, as prioritizing selection seed node;
When S is little, when RTT is large, now show with reference to seed node access network bandwidth little, and it is long with requesting node network distance, the data flow formed is easily by long-range network environmental impact, and cannot reach the effect that file-sharing is accelerated, this type of seed node should abandon;
When S is little, RTT hour, shows that this type of node access networks network bandwidth is low, but short with requesting node network distance, easily finds.This type of seed node should as optional node, depending on actual conditions.When preferred seed nodes cannot reach the number requirement of requesting node, this type of optional node can be connected.
When S is large, when RTT is large, show that this type of node access networks network bandwidth is high, but far away with requesting node network distance.A kind of mechanism newly is now utilized " in bunch, to propagate " mode, requesting node notice mobile agent node is connected with far-end seed node, Gains resources information, and is downloaded by mobile agent node, then distribute in the net of requesting node place, final requesting node gets resource requirement.
Nework analysis module: timing acquisition mobile agent node reporting respective network site, specifically comprises IP address, network description, particular geographic location descriptor; RTT value between mobile agent node in the IP address that the general mobile node of timing acquisition reports, gateway address information and net; And for above information, analyze the logical topological structure of each distributed P 2 P network, statistics mobile node RTT value end to end, is convenient to optimum choice module and calculates each optimal value with reference to seed node.
Fig. 3 shows mobile agent node selection model schematic, choose the number M (M=6 in Fig. 3 mainly comprising node, identify 6 independently wireless networks) and position L, suitable M and the L correct mark whole centralized P2P cellular logic structure of energy and the network site of each node, contribute to the performance improving Tracker server selected seed node.Three conditions are followed in choosing of mobile agent node: (1) maximum separation: because heterogeneous network exists distributed, the overlapping characteristic merged, in order to effectively identify a network site, the network of overlap is needed logically to separate, M mobile agent node is uniformly distributed in each network, its averaging network is apart from minimum, can uniquely represent each network, also be convenient to general mobile node and can find mobile agent node nearest from oneself on network distance; (2) representated by M bunch of network collection: M mobile agent node is exactly M actual network, although general mobile node skewness in network, but they are with a bunch form cluster for collection in logic, each general mobile node all belongs to certain bunch of unique collection; (3) bunch collection interior nodes average distance is minimum: distribute corresponding in order to keep logical network topology with real network, selected mobile agent position should minimum from other node average distances in bunch collection, when whole bunch of recurring structure change (between node during network distance change), mobile agent node effectively can reflect change (change of logical network topology) in bunch collection.When intra-cluster distance is less, bunch interior nodes is tightr, can well adapt to, when S is large, chooses mobile agent node in this bunch and first obtain the resource of far-end seed node when RTT is large, then bunch in the mechanism propagated.
Mobile agent unit, location management module: mobile agent unit, as the Centroid of network cluster collection, regularly reports the network site state of self, comprises IP address, network description, particular geographic location descriptor to Tracker server unit; Particularly upgrade network cluster collection state when own net interior nodes network site changes.
Access control module: network insertion and the state of being responsible for other nodes in network cluster collection, and when network site change or access way change occur other nodes, notice location management module carries out statistical information renewal.
General mobile terminal unit, session management module: be responsible for and Tracker server, carry out Signalling exchange between mobile agent, signaling is based on the improvement of Bittorrent agreement, general Bittorrent software can not only be supported, also add network insertion type, between network site description and mobile agent, RTT expands and identifies.As shown in the table with the signaling parameter of Tracker server interaction after expansion:
Access Management: be responsible for the mode obtaining current mobile terminal network insertion, and submit session management module to, fill nettype and netdescription extend information; Timing acquisition and mobile agent node RTT two-way time simultaneously, fills rttime extend information;
Peer information maintenance unit: identical with general P2P software respective modules function, safeguards the information (as peer_id, ip address, port numbers, task status etc.) of the seed node list that this terminal node and Tracker return; And be responsible for setting up data cube computation based on Transmission Control Protocol with each seed node, be convenient to data transmission module from seed node downloaded resources.
Data transmission module: be responsible for sharing of concrete resource data, comprises from seed node downloading data and self is as seed node uploading data.
Concrete, as shown in Figure 4, be embody rule of the present invention, general mobile terminal node carries out the workflow diagram of file-sharing acceleration, comprises the following steps:
Step 100: when building this centralized P2P file sharing network, for each separate network of current heterogeneous network (comprising M Radio Access Network) selectes unique mobile agent node, by RTT value two-way time that icmp packet is determined to each other between M mobile agent node, this M mobile agent node, as the network site reference point of whole heterogeneous network, keeps stable state;
Step 200: general mobile terminal node is carried out alternately as client and Tracker server, proposes resource download request.By the Bittorrent agreement of expansion, by the access network type of self, network description information, with the Parameter transfer such as mobile agent node R TT to Tracker server, as the foundation of follow-up selected seed node, when above parameter changes, timing feedback is to Tracker server;
Step 300:Tracker server process client-requested, inquire about the seed node information of whole network, seed node information is by Tracker server statistics and store with list catalogue, Preliminary screening goes out the seed node list conformed to client-requested resource, this type of seed node information is saved in historical query record, so that provide share service for the same request of other clients simultaneously;
Step 400: according to the seed node list of Preliminary screening, in this list, candidate seed nodes number exceedes the maximum seed node number needed for client, and each seed node concrete condition is not identical, as from the network distance distance of requesting client node, uploading rate, two-way time RTT, network insertion type etc.Therefore, carry out sharing the target accelerated for reaching optimal selection, Tracker server optimization selects module with reference to candidate seed nodes list, by the calculated value of nework analysis module to network distance between client and candidate seed nodes, in conjunction with optimization selection strategy, filter out the candidate seed list for client optimum further, and send to client;
Step 500: client receives optimum seed node list, and is connected with these nodes, carries out the lasting download of resource requirement; If in the process, node is had to leave heterogeneous network environment (client cannot be connected to this seed node) in optimum seed node list, this situation of client feedback is to Tracker server, Tracker server can according to 300,400 steps, again optimum seed node list is screened, and send to client, upgrade Peer node statistics information simultaneously; Client upgrades the downloading process that resource requirement is carried out in optimum seed node list, guarantees that in whole process, client downloads speed maximizes.
In sum, according to centralized P2P network configuration of the present invention and accelerated method, seed node in whole heterogeneous network is had and reasonably chooses, not only can reach the effect of network acceleration, for, seed node that uploading rate lower longer with download client distance, be more not easy to be selected; And uploading rate is high, apart from short seed node, to be wiredly selected, and this also meets the feature that mobile interchange information off the net spreads in reality scene, particularly for the situation of expansion type Resources Spread.Consider seed node uploading rate, network distance, two-way time RTT, access network type factor, the overall download time of resource file can reduce, and remote data flow significantly reduces, short range network flow increases, make the flow distribution equalization of whole P2P network, also improve network performance; Simultaneously, the mobile agent node of setting, not only can exist as general mobile terminal node, also as the reference node of network site, this mobile agent node is multifunction, follow-up as needed to expand the wireless network at its place, other functional unit can be increased on mobile agent node, the structure of whole network can not be affected.
It should be noted last that, above embodiment is only in order to illustrate technical scheme of the present invention and unrestricted, although with reference to preferred embodiment to invention has been detailed description, those of ordinary skill in the art is to be understood that, can modify to technical scheme of the present invention or equivalent replacement, and not departing from the spirit and scope of technical solution of the present invention, it all should be encompassed in the middle of right of the present invention.
Claims (3)
1. a heterogeneous wireless P2P network file shared system, is characterized in that, comprises Tracker server, mobile agent node, general mobile node;
Described Tracker server, comprises interactive controlling module, Peer administration module, optimum choice module and nework analysis module;
Described interactive controlling module: for the Signalling exchange between described mobile agent node, general mobile node, described Signalling exchange is based on the Bittorrent agreement of expansion; The Bittorrent agreement of described expansion comprises extended field nettype, and it is described as " client access network type ", rttime, and it is described as " client is to RTT two-way time of mobile agent node ";
Described Peer administration module: for realizing mobile agent node in whole distributed P 2 P network, the discovery of general mobile node, statistics and record, set up the real-time Peer MIB of unified whole network, carry out the Peer information source of seed node selection as optimum choice module;
Optimum choice module: for selecting the seed node list of the general mobile node adapting to current request file-sharing business most, maximizes file-sharing speed; Described optimum choice module adopts optimum target constraint function, sets up seed node list; Described optimum target constraint function is:
i=1,2......N, wherein N is can for the seed node number of optimum choice, P
ibe the seed node optimal value that i-th reference is chosen, A
ibe access network type normalized value, the S of the seed node that i-th reference is chosen
ibe the uploading speed normalized value of the seed node that i-th reference is chosen, RTT
ibe normalized value two-way time of the general mobile node that seed node that i-th reference is chosen is shared to demand file,
for the network insertion type normalized value of the general mobile node that demand file is shared; Described optimum target constraint function sets up seed node list, comprises following selection:
Work as S
igreatly, RTT
ihour, show that this reference seed node access network band is roomy, and the general mobile node network distance shared with demand file is short, the optimal value A of this reference seed node is large, as prioritizing selection seed node;
Work as S
ilittle, RTT
itime large, show that this reference seed node access network bandwidth is little, and the network distance of the general mobile node shared with demand file is long, the data flow of formation is easily by long-range network environmental impact, cannot reach the effect that file-sharing is accelerated, this type of seed node should abandon;
Work as S
ilittle, RTT
ihour, show that this reference seed node access network bandwidth is low, but short with requesting node network distance, easily find; As optional seed node;
Work as S
igreatly, RTT
itime large, show that this reference seed node access network bandwidth is high, but far away with requesting node network distance, and this reference seed node is as special far-end seed node; The general mobile node notice mobile agent node that demand file is shared is connected with this far-end seed node, Gains resources information, and downloaded by mobile agent node, then distribute in the general mobile node place net that demand file is shared, the general mobile node that final demand file is shared gets resource requirement;
Described nework analysis module: for timing acquisition mobile agent node reporting respective network site, specifically comprise IP address, network description, particular geographic location descriptor; RTT value between mobile agent node in the IP address that the general mobile node of timing acquisition reports, gateway address information and net; And for above information, analyze the logical topological structure of each distributed P 2 P network, add up general mobile node RTT value end to end;
Described mobile agent node comprises location management module and access control module;
Described location management module: the network site state reporting self for timing to described Tracker server, comprises IP address, network description, particular geographic location descriptor; Network cluster collection state is upgraded when own net interior nodes network site changes;
Described access control module: for network insertion and the state of other nodes in network cluster collection, and when network site change or access way change occur other general mobile nodes, notify that described location management module carries out statistical information renewal;
Described general mobile node unit comprises session management module, Access Management, Peer information maintenance unit and data transmission module;
Described session management module: for carrying out Signalling exchange between described Tracker server, mobile agent node, Signalling exchange is based on the Bittorrent agreement of expansion;
Described Access Management: for obtaining the mode of current general mobile node network insertion, and submit described session management module to,
Described Peer information maintenance unit: for safeguarding the information of the seed node list that general mobile node and described Tracker server return; And be responsible for setting up data cube computation based on Transmission Control Protocol with each seed node, be convenient to data transmission module from seed node downloaded resources;
Described data transmission module: be responsible for sharing of concrete resource data, comprises from seed node downloading data and self is as seed node uploading data.
2. heterogeneous wireless P2P network file shared system according to claim 1, it is characterized in that, Signalling exchange between described mobile agent node and general mobile node, comprise the shared file request message of general mobile node, the position feedback message of mobile agent node and general mobile node and heartbeat feedback message, general mobile node network insertion kind of message.
3. heterogeneous wireless P2P network file shared system according to claim 1 and 2, it is characterized in that, the Bittorrent agreement of described expansion also comprises extended field numwant, it is described as " client wishes the number of other seed node obtained from Tracker server ", netdescription, it is described as " client place network detailed description ".
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