CN100499463C - Peer-to-peer network transmission method facing moving terminal - Google Patents
Peer-to-peer network transmission method facing moving terminal Download PDFInfo
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- CN100499463C CN100499463C CNB2007100626918A CN200710062691A CN100499463C CN 100499463 C CN100499463 C CN 100499463C CN B2007100626918 A CNB2007100626918 A CN B2007100626918A CN 200710062691 A CN200710062691 A CN 200710062691A CN 100499463 C CN100499463 C CN 100499463C
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Abstract
Through mobile Internet possessing central node, mobile terminal accesses metamessage file of P2P service and obtains related information of data file. When carrying out data transmission, the method carries out shared data transmission through blue teeth to infrared etc wireless peer-to-peer network not possessing central node directly. Through central server to transfer control signal, the invention changes unordered wireless peer-to-peer network to controllable peer-to-peer network. Then, based on store and forward principle, the invention realizes data transmission between terminal devices not connected to each other directly so as to raise capability of sharing data between terminal devices in wireless peer-to-peer network.
Description
Technical field
The present invention relates to a kind of peer-to-peer network (peer to peer towards portable terminal, be called for short P2P) transmission method, relate in particular to a kind of portable terminal and obtain the download message of shared data file by mobile Internet, and realize the method for transfer of data belonging to the mobile Internet applied technical field by wireless peer-to-peer network.
Background technology
Among the user of portable terminal such as mobile phone, PDA etc., extensively exist the demand of shared data file.At present, the mode of two kinds of shared data is arranged between the portable terminal: first kind is middle by other equipment, and two terminals directly connect one to one, carry out data sharing; Second kind is that terminal A is connected with terminal B by the base station, carries out data sharing mutually.In first kind of mode, the intensity of wireless signal is very unstable, and transfer of data is easy to be interrupted.In addition, this kind mode need adopt the request of data mode of broadcasting, will cause very big visit pressure to base station equipment on every side, and simultaneously, this mode can't realize that also the active data between the terminal is shared.In the second way, as shown in Figure 1, terminal A sends the request of oneself to the base station, the base station is transmitted to server to the request of terminal A, and server finds a terminal B who satisfies terminal A demand, tells the base station address of terminal B, terminal B is told in the base station, allows it provide service for terminal A.When carrying out transfer of data, terminal B gives the base station data passes actual, and the base station is given terminal A data passes.The existing problem of this mode is to have a large amount of uplink and downlink data between terminal and the base station, brings very big pressure for the communication capacity of base station.Therefore, this kind mode can only realize sharing of small data quantity.The user can't adopt this mode to realize to the data sharing requirement that a large number of users under the shared requirement of large data files or the same base station proposes.
The P2P technology is realizing that data file has great advantage aspect sharing, and it has obtained using widely in fixed network.And current 2,000,000,000 the mobile subscriber colony of surpassing uses P2P and is undoubtedly an enormous and latent market, and the all-IPization of communication network also impels operator that the mobile P 2 P business has been produced interest.But P2P also is in imagination and tentative stage in the application of mobile cellular network, also has following many technology barriers to need to solve:
1. the mobile radio communication service traffics that can provide are restricted
Online in fixed data, P2P is considered to " broadband killer " usually.Statistical report according to relevant authoritative institution shows, in fixing IP network, has to surpass 60% service traffics by the professional generation of various P2P.For mobile communications network, Radio Resource is very valuable.How to average out between P2P business and radio resource consumption is that operator needs the at first problem of solution.The person's character of no centralization node that P2P itself is intrinsic and unlimited expansivity has determined the P2P business is moved to the bad dream that mobile communications network will be all mobile operator from fixed network simply.For example: the eMule shared file system is deployed in the middle of the current GPRS network, can predict, for the GPRS reserved radio resource can promptly be consumed by these business, other business is browsed, may be faced the condition that No Assets can be used based on the mobile value-added service of GPRS such as WWW.Therefore, the professional service traffics problem that produces of P2P will be a huge challenge to all mobile operator.
2. abominable relatively channel circumstance and mobility
A greatest differences between cellular network and the fixed network is that communication environment is different with mobility.It is much abominable that wireless link environment relative fixed network in the cellular network is wanted, often may be because problems such as the multipath fading of wireless signal and channel congestion cause the connectedness between the P2P node not to be protected, this has influence on the structure of P2P overlay network to a certain extent, and can bring certain influence to the inquiry in the P2P network, routing mechanism etc. thus.The frequent mobility of mobile environment lower node also is a very big challenge for existing P 2P business, can cause a series of technical problem.For example, the employing of mobile IP mechanism can influence the intrinsic covered structure of P2P network to a certain extent in mobile communications network, because the P2P network is the nerve of a covering of an application layer in essence.The employing of mobile IP mechanism is as the P2P network perception in time of application layer, to such an extent as to its topological structure can not synchronously adapt to the adjustment of physical network.The excessive frequent mobility structure that may destroy whole P2P network under certain condition allows the P2P business can not normal operation.At present, about the research work of this respect also seldom, need further the research mobility, adopt under mobile environment the less P2P business of structure influence to dispose the influence of P2P network configuration.
3. mobile device itself is not suitable for carrying out the P2P business
When carrying out the P2P business under the mobile cellular environment, a very important problem is the ability of mobile device itself.Restriction of the CPU disposal ability of mobile device, available memory space, battery service time or the like compares with the fixed network node device that there is a big difference.This makes it be not suitable for existing a lot of successful P2P and uses, such as the transmission of big file with share etc.For this reason, someone imagines operator aspect the deployment of mobile P 2 P business, should take into account the factor of aspects such as the computing capability of terminal, storage capacity, battery, carry out the P2P business of " lightweight ", such as cooperation mobile office business, based on mutual Word message, brief multimedia messages, the pictorial information of restriction size based on P2P.But can bring many inconvenience to the user so undoubtedly.
Because the existence of above-mentioned problems, people generally believe in existing GSM/GPRS system, also can't realize P2P truly, because its network does not allow portable terminal to become a stand-alone terminal with fixed ip address.Data are during from Network Transmission to mobile phone, and the transmission tunnel is in Gateway GPRS Support Node place termination, and then operator is data continuation routing according to own standard.In addition, the athletic meeting of portable terminal causes the variation of GGSN in the data transmission procedure.The continuous variation of position promptly allows to find portable terminal in the somewhere, because also can't be accomplished continual dynamic connection according to HLR (attaching position register) and VLR (Visited Location Registor) information.(referring to Song Jing " in the mobile environment P2P use ", 26～29 pages of the Guangdong communication technology 2006 the 7th phases) has only applying of wireless broad band technology such as 3G, WLAN, WiMax possibility is provided technically could for the large scale deployment of P2P business under mobile environment.
Summary of the invention
The object of the present invention is to provide a kind of peer-to-peer network transmission method towards existing portable terminal.In this method, portable terminal is realized data sharing by the wireless peer-to-peer network that does not need Centroid then by the meta-information file that the mobile network with Centroid initiatively obtains the P2P business.
For realizing above-mentioned goal of the invention, the present invention adopts following technical scheme:
A kind of peer-to-peer network transmission method towards portable terminal is characterized in that:
(1) meta-information file of the mobile Internet visit P2P business of portable terminal by having Centroid is obtained data file for information about;
(2) when wireless peer-to-peer network forms, provide this portable terminal can realize direct-connected other portable terminals by wireless network on every side targetedly by the portable terminal checkout equipment;
(3) when carrying out transfer of data, directly carry out shared data transmission by the wireless peer-to-peer network that does not have Centroid.
Wherein, on the base station of mobile radio communication, set up server, be used to provide the index service function of P2P business.
Be responsible for the name of portable terminal by the server that is erected at the base station, and with 8 16 system characters name portable terminals.
For the shared data file of in portable terminal, storing, generate one 8 HASH number according to the title of this shared data file, big or small factor, in database, identify this shared data file with this HASH number.
After server sent the file download request, server provided the optimum route of file download/forwarding at portable terminal, allowed portable terminal download needed file according to described optimum route.
Described optimum route is calculated as follows: at first according to all portable terminals upload around can direct-connected list of devices, calculate direct attachable portable terminal tabulation respectively, transmit attachable portable terminal tabulation, transmit attachable portable terminal tabulation by server by secondary file by a file at each portable terminal; These three tabulations with can provide the portable terminal ID of file download service to compare, portable terminal that need to determine file the to transmit the shortest path of device queue minimum, that transmit simultaneously, finish the needed time of transmission minimum be exactly the optimum route of file download/forwarding.
Server provides effective route of downloading a certain shared data file to the portable terminal that proposes the retrieval requirement, comprises an optimum route and two alternate routings.
Can direct-connected portable terminal around the portable terminal checkout equipment detects at interval automatically according to certain hour, and the equipment connecting relation of one-to-many generated a file, among the database of uploading onto the server.
The work that the present invention initiatively obtains the work of meta-information file and actual transmissions file data with portable terminal respectively by two independently communication network finish, thereby effectively reduced the communication data amount of base station and portable terminal, also improved simultaneously the ability of carrying out data sharing between the terminal equipment, avoid occurring the mobile communication base station when the mass data request produces, the problem that offered load is overweight.Utilize method provided by the present invention, can successfully support carrying out of P2P business with existing 2G mobile communication technology.
Description of drawings
The present invention is further illustrated below in conjunction with the drawings and specific embodiments.
Fig. 1 is in the prior art, realizes the schematic diagram of data sharing between the different mobile terminal by the base station.
Fig. 2 is the schematic diagram of portable terminal peer-to-peer network provided by the present invention method of attachment.
Fig. 3 is in the method for attachment of this peer-to-peer network, the schematic diagram of portable terminal checkout equipment search Bluetooth terminal.
Fig. 4 is in the method for attachment of this peer-to-peer network, enlarges the schematic diagram of data sharing scope by data forwarding mechanism.
Embodiment
Among all kinds of portable terminals that with mobile phone, PDA etc. serve as typical case's representative, the most widely used is mobile phone.Therefore, will be that example is launched detailed explanation to concrete implementation step of the present invention below with the mobile phone.
Realize peer-to-peer network transmission method provided by the present invention, mobile phone need possess following condition:
1. has the function of supporting GPRS or WAP business, directly access internet.
GPRS is the abbreviation of General Packet Radio Service (GPRS), and it is a kind of new packet data bearers business that development is come out on existing gsm system.By gprs service, mobile phone can send and receive Email, downloads data in also addressable the Internet.
WAP is the abbreviation of Wireless Application Protocol (WAP (wireless application protocol)).It is to enter the Internet and other untapped novel value-added telecom services and the cover standard that designs at mobile communication equipment.
2. can support wireless data transmission protocols such as bluetooth, infrared or Wireless USB
Bluetooth or infrared communication function have become the standard configuration of a lot of mobile phones.Utilize Bluetooth function, can in the distance within 10 meters, realize the transfer of data of 1Mbps between the different portable terminals.Up-to-date " bluetooth 2.0+EDR " technology can realize the data stabilization transmission in 100 meters scopes.Infrared also is a kind of short-distance wireless data transfer mode commonly used, and its data transmission bauds can reach more than the per second 4Mbps.In addition, the Wireless USB standard has been worked out and has been finished, and this technology can realize the transmission speed of 480Mbps in 3 meters scope, and maximum effective range is 10 meters.
3. has certain data processing capability
Realize the present invention, mobile phone itself must possess certain data processing function, can move specific program.For example be Bit Torrent (the being called for short BT) client software of portable terminal customization specially.Like this, this mobile phone can directly be resolved the meta-information file (.torrent) of P2P business, obtains the download message of relational data file.At present, Jue Daduoshuo smart mobile phone can both satisfy above-mentioned requirement.
Referring to shown in Figure 2, specific implementation process of the present invention is such:
The issuing service of shared data file at first, is provided on the mobile Internet that mobile phone can be visited by GPRS function or WAP function.Particularly, on this mobile Internet, set up a server that the WEB access services can be provided, as Centroid.The function of this server comprises by the WEB mode provides releasing news of unified management, provides corresponding management and service etc. to each portable terminal, in addition, can also be used for realizing charging, digital copyright management management functions such as (DRM).
The present invention is directed to the cellphone subscriber when implementing, best mode is selected in the base station of mobile radio communication and sets up this server.Can make things convenient for mobile phone to search out releasing news of data file fast like this.In addition,, be responsible for the name of portable terminal by the server that is erected at the base station in conjunction with the characteristics of mobile communication self, and with 8 16 system characters name portable terminals.If portable terminal is a mobile phone, then phone number will with portable terminal ID permanent bindings.
What in the present invention, the transfer of data of peer-to-peer network adopted is to be similar to the mode that existing BT downloads.Therefore in order to issue the file that data sharing can be provided, meta-information file (.torrent) need be set.In this meta-information file, at first be the position of having noted down publisher server, be that server issue so that allow client software know, be some fileinfos then, as filename, directory name, length or the like, be Sha1 check code of fragment length and fragment etc. at last.
Provide shared data file should satisfy two conditions in portable terminal: the portable terminal of this file of request download is many; These data in the whole terminal point to point network, the data backup minimum number.For the ease of unified management, in internal processes of the present invention, the shared data file stored in portable terminal is generated one 8 HASH number according to factors such as the title of this document, sizes, in database, identify this file with this HASH number.Like this, identical file has identical HASH number, the repetition, the omission problem that have been difficult to avoid when having avoided merely by filename identification file.In the data in server storehouse, only store the HASH number of shared data file, not storing data files itself.
In addition, the file HASH ordered series of numbers table of this equipment that the server that is positioned at the base station is uploaded according to all portable terminals, the correspondence table of spanned file HASH number and portable terminal ID.As shown in table 1:
| Portable terminal ID | The HASH number of portable terminal institute storing data files |
| 000111 | ACDEKISF，DKIWKSKS，AKDRSDKS |
Table 1
Like this, when portable terminal sent the file download request to server, server was compared HASH number and this correspondence table of institute's demand file, just can find out the portable terminal that file download service can be provided.
Before address, the BT client software has been installed in mobile phone in advance.Like this, when mobile phone is visited the issue page that above-mentioned server provides by GPRS or WAP function, just can directly consult interested shared data file, and correspondingly open corresponding torrent file.After opening, new file is just set up if judge the non-existent words of file in the position that at first allows user's select File preserve, and the words of existence are just removed verification file with the Sha1 check code.If find wrong just think also do not download, so just can realize that file continues to have passed.
The torrent file that uses in employed torrent file and the existing BT software among the present invention is on all four in form, need carry out necessary adjustment at the characteristics of mobile radio communication in terms of content, for example the address of publisher server should be the base station identity code of mobile communication base station.Info_hash and peer_id are the Sha check codes of the info part in the torrent file, and it can not changed.Then change the ID that fills in phone number or other type portable terminal in the place of filling in the IP address originally.
Opened in the mobile phone after the torrent file, will download corresponding file to server requests.In server, there is special track program to manage these requests, obtain just using info_hash behind the corresponding HASH code and search data file list, the number and the PORT COM that will instead connect (Nat Check) mobile phone after finding, server returns and is downloading all cellphone subscribers' of this file number and PORT COM now then.Obtain these peer ID (phone number or Termination ID) afterwards, BT software just can find corresponding mobile terminal to realize having downloaded.
In the present invention, because employed portable terminal such as mobile phone etc. all have functions such as bluetooth, infrared or Wireless USB, each therefore contiguous mutually mobile phone terminal can be formed Ad Hoc (equity) network based on bluetooth or broadband wireless data transmission protocols such as infrared.Concrete networking agreement can reference papers " the Ad Hoc network based on bluetooth forms agreement " (Shen Huixian, Fang Xuming, " telecom technology " 2003 the 5th phases), does not just describe in detail at this.After Ad Hoc network forms, actual when carrying out the download of shared data file, corresponding shared data flow does not transmit by the mobile radio communication with Centroid (being base station sub-system), but realizes transmission by the wideband A d Hoc network that does not have Centroid.Such technical solution not only efficiently solves carries out the OL problem of the professional insoluble base station equipment of institute of P2P in mobile radio communication, and made full use of bluetooth that mobile phone itself has or broadband wireless transmission function such as infrared, can realize that the high speed of data file is shared.
When downloading, the BT client software can remove to seek the thing that oneself will download to relevant peer in the actual data of carrying out, and it whenever finds a peer just to set up a Socket and downloads, so it is many more to add the people who downloads, speed is just fast more.
Because the limited coverage area of existing Bluetooth protocol, therefore the BT service that server provided among the present invention can not resemble in the fixed network and only provide the ID (or phone number) of corresponding peer to get final product the use BT, but can realize direct-connected other portable terminals by wireless network around this portable terminal will be provided targetedly.This just needs relevant portable terminal checkout equipment.This portable terminal checkout equipment can be to have the equipment that the bluetooth of using in the mobile phone connects guide and so on now.As shown in Figure 3,, can search for the Bluetooth mobile terminal in the effective signal area automatically, and during Search Results uploaded onto the server, use during for networking by this equipment.
Introduced the basic framework of portable terminal peer-to-peer network transmission method provided by the present invention above.But when specific implementation, also have a lot of concrete technical problems to need to solve.Be illustrated respectively below.
At portable terminal after server sends the file download request, server not only will be retrieved this HASH number that needs file in download, to obtain the corresponding mobile Termination ID, the optimum routed path of file download/forwarding also to further be provided, allow portable terminal download needed file according to this path.This is because under mobile environment, the locus of terminal, will directly influence the transmission quality of wireless channel apart from the distance of base station, factor such as whether moving, mobile phone is sought download/forwarding route according to the mode of common BT software download if leave, be easy to cause transmission often to occur interrupting, need reconfigure the situation of route.Therefore in the present invention, in view of can comprehensively grasping the position of relevant portable terminal, the situation of the data file that has in the base station, therefore by its optimum route that provides file to download.
This optimum route calculation method is such: at first according to all portable terminals upload around can direct-connected list of devices, calculate direct attachable portable terminal tabulation respectively, transmit attachable portable terminal tabulation, transmit attachable portable terminal tabulation by server by secondary file by a file at each terminal.These three tabulations with can provide the portable terminal ID of file download service to compare, determine that the portable terminal that needs file to transmit is minimum, simultaneously, the shortest path of device queue of transmitting, finishing the needed time of current transmission minimum (comprising the time of waiting in line before the transfer of data) is exactly the best route of this file download request.
The time of waiting in line before the above-mentioned transfer of data is to calculate like this: when other portable terminals propose the file download or the request of forwarding to certain portable terminal, this portable terminal will be by transmission speed, transmission the size of file, calculate the terminal time of finishing the required consumption of current service.When a last service is not finished, next request will be in queueing condition.The length of formation (beginning the time that new file transfer services need be waited for) will be used to calculate the busy extent of this terminal, and these data will be transferred to the above-mentioned server that is arranged in the base station.
In the prior art, portable terminal need adopt broadcast mode to propose the demand of oneself in network, and this has just brought bigger burden to the base station; And in the present invention, the retrieval requirement of best route is proposed to the server that is positioned at the base station by portable terminal, this server provides effective route of downloading a certain shared data file to the terminal that proposes the retrieval requirement, comprises a best route lines (other equipment that approach is minimum) and two alternate routing circuits (selecting different as far as possible path and source files).
Because in method provided by the present invention, need utilize bluetooth or the infrared wireless transmission protocol realization transfer of data that waits.There is a common defective in these wireless transmission protocols, are exactly that transmission range is short.Existing Bluetooth technology can only realize the interior stable transfer of distance about 10 meters.Though have report to declare to utilize Bluetooth technology can realize the stabilized communication that 2 kilometer range are interior, also do not have the possibility of popularization at present.Therefore in the face of needing roving user, portable terminal need be according to certain hour can direct-connected equipment around at interval (for example 60 seconds) are detected automatically, and the equipment connecting relation of this one-to-many generated a file, upload among the database of base station server.
In order further to enlarge the transmission range of shared data, server will be added up the information of other portable terminal that each portable terminal can directly cover.In server, form the following relation (table 2) between the portable terminal:
| Portable terminal ID | Other portable terminal ID that can directly cover |
| 000111 | A1C321，A192841，C84921 |
| A1C321 | 000111，B98421 |
Table 2
Like this, originally can only be between two station terminals shared data, now as shown in Figure 4, can be by the data forwarding ability of middle portable terminal, shared data between many portable terminals, thereby help the formation of wireless peer-to-peer network between the portable terminal, improve the ability that mobile terminal data is shared.
For example, portable terminal 000111 can be realized communicating by letter with other three portable terminal A1C321, A192841, C84921; Portable terminal A1C321 can be with 000111, B98421 realizes communicate by letter, the route selection algorithm by server so, and portable terminal 000111 can be realized by the data forwarding of portable terminal A1C321 and the data sharing of portable terminal B98421.
Because data forwarding once, just means needs and consumes a bandwidth.For example 6 grades of forwardings mean the data of 1M, need to transmit 5 times, be equivalent to consume the bandwidth of 5M, and therefore actual Network Transmission bandwidth is after 6 grades of forwardings, and its utilance has only 20%.For fear of above-mentioned problem, can stipulate transmit to surpass certain scope.This scope is advisable to be no more than 6 grades.Certainly, if the computing capability of server and storage capacity are enough, it is fully feasible that the forwarding scope further enlarges.By the mode of this data forwarding, suppose that the covering radius that original each portable terminal carries out wireless connections is 10 meters, by the forwarding of 5 portable terminals on every side, its covering radius can expand 60 meters to.That is to say,, under the enough situation of the density of portable terminal, can satisfy nearly all indoor data and download demand by the enforcement of the technical program.
Because the transmission range of the bluetooth used or Radio Transmission Technology such as infrared is limited, therefore usually can appear at around the user situation that can not find the portable terminal that to form peer-to-peer network in 10 meters the scope fully in the technical program.At this moment, the user should change the position at own place, initiatively transfers to the zone that peer-to-peer network that other portable terminal forms can cover.For fear of the situation that the user blindly moves occurring, server in the base station can utilize it to grasp the advantage of all mobile terminal locations in the scope of base station, initiatively inform that by modes such as short messages this user can provide the position at other user place of its file interested, allow the user move the position of oneself with a definite target in view.Here, the position of accurately knowing the user is the key that realizes this service function, and this point is easy to by realizations such as existing mobile positioning technique such as OTDOA, does not just describe in detail at this.Certainly, if realize the more accurate location location, also can adopt A-GPS or gpsOne technology, on portable terminal, set up the GPS recipient, this GPS recipient is accepted satellite-signal, adopt the GPS locating information that high-quality positioning service is provided, and the accurate location information of portable terminal is informed server in the base station.
Another method of improving the invention process effect is exactly to adopt more competitive broadband wireless Data Transport Protocol to realize Ad Hoc network.At present, a kind of technology that can substitute Bluetooth protocol occurs, and it is exactly Wi-Fi (Wireless Fidelity, a wireless compatibility authentication) technology.This technology is the same with bluetooth, belongs to the short distance wireless technical that uses in office and family, though slightly be inferior to Bluetooth technology aspect Information Security, then even better aspect the coverage of electric wave, its coverage can reach about 90 meters.
In the application of reality, might occur not having other users that the situation of shared data service can be provided for him fully around some users.At this problem, can in portable terminal, keep the function of directly downloading, so that directly from the base station, obtain data by GPRS.
There is no hiding it, realizes P2P business under the mobile environment because the present invention is based on existing 2G mobile communication technology fully, has been subjected to certain limitation in the process that realizes Ad Hoc network, is not adapted at use all environment under.But, in some crowded occasions, square, commercial street or tourist attraction as red-letter day, the density of its portable terminal is far longer than implements threshold value of the presently claimed invention (be average in the per 10 meters distance exist at least one can implement portable terminal of the present invention), therefore is particularly suitable for enforcement of the present invention.
With tourist attraction the Forbidden City is example, and in order to provide guide service to the visitor, a plurality of electronic guide equipment need be prepared by the Forbidden City administrative department.Determine in advance owing to visitor's demand is very difficult how much quantity of therefore preparing electronic guide equipment just becomes a difficult problem,, and prepare the very few demand that can not fully satisfy the visitor, influence the quality of tourist service if preparation too much can cause waste.Particularly in occasion such as host the Olympic Games, simple rely on increase electronic guide equipment can not be from the hidden danger of basic elimination service quality.At this problem, the introduction of relevant tourist attractions can be made in advance several million and even the video clip of tens of million sizes, leave in the server of relevant mobile communication base station in advance or among the portable terminal at this place, place, sight spot.Visitor one goes to this place, place, sight spot, just can utilize the quick-downloading video clip of introducing this sight spot of method provided by the present invention, thereby obtains guide's information that both pictures and texts are excellent.Under above-mentioned application scenario, because the visitor can locate high concentration at some main sight spots such as the Hall of Supreme Harmony etc., they again can be interested in the same video content of introducing this sight spot herein simultaneously, therefore utilizing wireless transmission protocol such as bluetooth to implement the present invention herein is exactly ten minutes thing easily, and people's current density is big more, the wireless Ad Hoc network of easy more composition shared file data, the speed of file-sharing are also fast more, and it is also just good more to implement effect of the present invention.
Equally, in commercial streets such as Wangfujing, utilize method provided by the present invention to propagate trade promotion information, also can obtain good effect.
More than to provided by the present invention in the peer-to-peer network communication process, portable terminals such as mobile phone obtain the information of data file by the meta-information file of visit in the mobile Internet, and realize that by bluetooth or wireless data transmission protocols such as infrared the method for transfer of data has been described in detail.For one of ordinary skill in the art, any conspicuous change of under the prerequisite that does not deviate from connotation of the present invention it being done all will constitute to infringement of patent right of the present invention, with corresponding legal responsibilities.
Claims (8)
1. peer-to-peer network transmission method towards portable terminal is characterized in that:
(1) meta-information file of the mobile Internet visit peer-to-peer network business of portable terminal by having Centroid is obtained data file for information about;
(2) when wireless peer-to-peer network forms, provide this portable terminal can realize direct-connected other portable terminals by wireless network on every side targetedly by the portable terminal checkout equipment;
(3) when carrying out transfer of data, directly carry out shared data transmission by the wireless peer-to-peer network that does not have Centroid.
2. the peer-to-peer network transmission method towards portable terminal as claimed in claim 1 is characterized in that:
On the base station of mobile radio communication, set up server, be used to provide the index service function of peer-to-peer network business.
3. the peer-to-peer network transmission method towards portable terminal as claimed in claim 2 is characterized in that:
Be responsible for the name of portable terminal by the server that is erected at the base station, and with 8 16 system characters name portable terminals.
4. the peer-to-peer network transmission method towards portable terminal as claimed in claim 1 is characterized in that:
For the shared data file of in portable terminal, storing, generate one 8 HASH number according to the title of this shared data file, big or small factor, in database, identify this shared data file with this HASH number.
5. the peer-to-peer network transmission method towards portable terminal as claimed in claim 2 is characterized in that:
After server sent the file download request, server provided the optimum route of file download/forwarding at portable terminal, allowed portable terminal download needed file according to described optimum route.
6. the peer-to-peer network transmission method towards portable terminal as claimed in claim 5 is characterized in that:
Described optimum route is calculated as follows: at first according to can tabulating by direct-connected portable terminal that all portable terminals are uploaded, calculate can tabulate, transmit attachable second portable terminal tabulation, transmit attachable the 3rd portable terminal tabulation by secondary file by a file by direct-connected first portable terminal at each portable terminal respectively by server on every side; The tabulation of described first portable terminal, the tabulation of second portable terminal and the tabulation of the 3rd portable terminal with can provide the portable terminal ID of file download service to compare, the shortest path of portable terminal that need to determine file to transmit portable terminal queuing minimum, that transmit simultaneously, finish the needed time of transmission minimum be exactly the optimum route of file download/forwarding.
7. the peer-to-peer network transmission method towards portable terminal as claimed in claim 5 is characterized in that:
Server provides effective route of downloading a certain shared data file to the portable terminal that proposes the retrieval requirement, comprises an optimum route and two alternate routings.
8. the peer-to-peer network transmission method towards portable terminal as claimed in claim 2 is characterized in that:
Can direct-connected portable terminal around the portable terminal checkout equipment detects at interval automatically according to certain hour, and the equipment connecting relation of one-to-many generated a file, among the database of uploading onto the server.
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| Publication number | Priority date | Publication date | Assignee | Title |
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2007
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102571863A (en) * | 2010-12-30 | 2012-07-11 | 国际商业机器公司 | Method and device for realizing content sharing between mobile terminals |
| US9154997B2 (en) | 2010-12-30 | 2015-10-06 | International Business Machines Corporation | Content sharing among mobile terminals |
| US9264511B2 (en) | 2010-12-30 | 2016-02-16 | International Business Machines Corporation | Content sharing among mobile terminals |
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