CN101091362A - Method and apparatus for peer-to-peer instant messaging - Google Patents
Method and apparatus for peer-to-peer instant messaging Download PDFInfo
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- CN101091362A CN101091362A CN200580044978.7A CN200580044978A CN101091362A CN 101091362 A CN101091362 A CN 101091362A CN 200580044978 A CN200580044978 A CN 200580044978A CN 101091362 A CN101091362 A CN 101091362A
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Abstract
The invention proposes a method of peer-to-peer instant messaging and the mobile terminal thereof, which could make the mobile terminal to establish and maintain a list of friend users and update the connection status of the friend users timely. The method of peer-to-peer instant messaging includes following steps: receiving the list of on-line users with capability of peer-to-peer instant messaging sent by the radio network; comparing said list of particular users with said received list of on-line users; updating, according to said comparison result, the connection status record of each user in said list of particular users so that the mobile terminal could establish a peer-to-peer instant messaging with at least one user mobile terminal in said list of particular users according to said updated connection status record. The present invention enables the user to establish peer-to-peer connection more effectively and to perform instant messaging while occupying less network resources.
Description
Technical field
The present invention relates to instant message transrecieving (IM), more specifically, relate to equity (P2P) the instant message transrecieving method and apparatus in a kind of radio net.
Background technology
Instant message transrecieving (messaging) is used for making the user of network to chat in real time or transmission information with the form of words or other information, and network can be internet and such as other mobile radio telephone networks such as GSM, CDMA.Simultaneously, the instant message transrecieving system can be in time notifies user's online/off-line state in its contact list to each online user.
Conventional instant message transrecieving system adopts the client/server structure pattern, and under described peer-to-peer communications pattern, live chat or information transmit and can directly carry out between two or more portable terminals, and need not to relate to the base station.For set up reciprocity instant message transrecieving between two portable terminals, U.S. Patent Publication No.2003/0182428A1 (inventor is Jiang Li, Keman Yu, Kaibo Wang, Yong Li and Shipeng Li) discloses a kind of correlation technique.According to described method, at first client terminal links to each other with the IM server; Client terminal sends its device address and access code to the IM server; Other online client terminals in the client terminal Searching I M server; Client terminal is analyzed the information of other client terminals, to determine that they are whether in identical network, if then set up equity and connect; Client terminal is to the other side's client terminal transmission information, with the beginning peer-to-peer communications.Adopt described method, can between two client terminals, set up reciprocity instant message transrecieving.Because the TD-SCDMA system under TDD (time division duplex) pattern can be under the situation of not using the required uplink and downlink system symmetrical spectrum of FDD (Frequency Division Duplexing (FDD)) system, on same vehicle, carry out up link and downlink transmission, so become the cdma system that is fit to peer-to-peer communications.
Described prior art problems is, under the prerequisite of reciprocity instant message transrecieving, mobile terminal user can only be carried out instant message transrecieving with other portable terminals that can be connected with its foundation equity, simultaneously, mobile terminal user is usually only carried out online instant message transrecieving with some fixing specific users (for example friend, business parnter, client etc.), rather than with contact list in all users.Therefore, the user need keep these specific users' tabulation in portable terminal.In addition, when the user wanted to connect with these specific users, he need know that these users are whether online and whether satisfy and set up the demand that equity connects that promptly the user needs these specific users' the connection state information that upgrades in time.Yet in the practical application of described prior art, described list of particular users and connection state information be usually by network operation and management, and this can take some and the more valuable Internet resources of mobile terminal resource; In addition, network load also so too heavy.
Therefore, need provide a kind of method and apparatus that is used for reciprocity instant message transrecieving, this method and apparatus makes the user can use Internet resources more effectively and takies less Internet resources.
Summary of the invention
The purpose of this invention is to provide the reciprocity instant message transrecieving method in a kind of radio net, this method can make portable terminal set up and the storage list of particular users, and these specific users' that can upgrade in time connection state information.
Another object of the present invention provides a kind of portable terminal that can carry out reciprocity instant message transrecieving, this portable terminal is set up and the storage list of particular users, and these specific users' that upgrade in time connection state information, thereby portable terminal can be set up reciprocity instant message transrecieving with these specific users according to the connection state information that upgrades.
According to the present invention, a kind of reciprocity instant message transrecieving method that is used for portable terminal is provided, described portable terminal comprises the contact list of storage in advance, the described contact list of storage in advance comprises at least one list of particular users, described method comprises the steps: to receive the tabulation of the online user with reciprocity instant message transrecieving ability, and described online user's tabulation sends by radio net; Described list of particular users is compared with the described online user's tabulation that receives; According to described comparative result, upgrade the connection status record of each user in the described list of particular users, thereby portable terminal can be set up reciprocity instant message transrecieving with at least one customer mobile terminal in the described list of particular users according to the connection status record of described renewal.
According to the present invention, a kind of reciprocity instant message transrecieving method that is used for portable terminal is provided, described portable terminal comprises the contact list of storage in advance, the described contact list of storage in advance comprises list of particular users at least, and described method comprises the steps: to report reciprocity instant message transrecieving ability to other portable terminals; The identification information feedback that reception is sent respectively by described other portable terminals; Described list of particular users is compared with the described identification information feedback that receives; According to described comparative result, upgrade the connection status record of each user in the described list of particular users, so that described portable terminal according to the connection status record of described renewal, is set up reciprocity instant message transrecieving with at least one customer mobile terminal in the described list of particular users.
According to the present invention, a kind of portable terminal that can carry out reciprocity instant message transrecieving is provided, comprising: receiving system is used to receive the tabulation by the online user with reciprocity instant message transrecieving ability of radio net transmission; The user list tape deck is used to store contact list, and described contact list comprises at least one list of particular users; The state recording device is used for writing down described each user's of list of particular users connection status; And controller, be used for the described online user's tabulation that receives is compared with described list of particular users.
In sum, the invention provides a kind of reciprocity instant message transrecieving method and portable terminal, described portable terminal comprises user list tape deck and the User Status tape deck that can store list of particular users and specific user's connection status.When the user opens portable terminal and registers to radio net, radio net is sent to described portable terminal with online mobile subscriber's tabulation, relatively, portable terminal can obtain the online connection tabulation, the user can be according to described tabulation, send connection request, thereby when taking less Internet resources, set up the equity connection more effectively and carry out instant message transrecieving.
By description and the claims of reference below in conjunction with accompanying drawing, other purposes of the present invention and effect are apparent, and can understand the present invention more fully.
Description of drawings
Fig. 1 is the schematic diagram of the applied environment of reciprocity according to an embodiment of the invention instant message transrecieving system.
Fig. 2 is the schematic block diagram of the function of reciprocity according to an embodiment of the invention instant message transrecieving portable terminal.
Fig. 3 is the flow chart that upgrades User Status in the reciprocity according to an embodiment of the invention instant message transrecieving method.
Fig. 4 sets up the flow chart that equity connects in the reciprocity according to an embodiment of the invention instant message transrecieving method.
Fig. 5 is the schematic diagram at reciprocity according to an embodiment of the invention instant message transrecieving mobile terminal user interface.
Fig. 6 is the schematic diagram at reciprocity according to another embodiment of the present invention instant message transrecieving mobile terminal user interface.
In above-mentioned institute drawings attached, identical identical, the similar or corresponding feature/function of Reference numeral representative.
Embodiment
Fig. 1 is the schematic diagram of the applied environment of reciprocity according to an embodiment of the invention instant message transrecieving system.Mobile terminal UE A, UE B and UE C can with base station or Node B wireless connections, Node B is connected with core network 6 via radio network controller (RNC) 5, user terminal UE A, UE B and UE C UMTS terrestrial radio accesses network (UTRAN) exchange message by being formed by base station transceiver (Node B) and radio network controller 5.
If user terminal UE A wants to set up peer-to-peer communications with user terminal UE B, then ask the caller party terminal UE A of peer-to-peer communications at first to send reciprocity call request to UTRAN by uplink control channel, the patent No. of submitting to Patent Office of the People's Republic of China on March 7th, 2003 at Koninklijke Philips Electronics N.V. 03119895.3, be entitled as in the invention of " Method andapparatus for establishing and maintaining radio link ofpeer-to-peer communication in radio communication network ", describe the method for setting up and safeguarding the peer-to-peer communications radio link in detail, described application openly will be in conjunction with in this application.
Fig. 2 is the schematic block diagram of the function of reciprocity according to an embodiment of the invention instant message transrecieving portable terminal.Portable terminal 1 comprises controller 11, radio-frequency module 12, user list tape deck 13, storage device 14, state recording device 15 and antenna 16.Controller 11 is used for data processing and storage, and its major function is baseband coding/decoding, speech coding and speech coding etc.In the present embodiment, described controller 11 also is used for the online user's tabulation that receives is compared with the list of particular users of user list tape deck, and according to described comparative result, upgrades the connection status record in the described state recording device.Radio-frequency module 12 is used for receiving and sending high-frequency signal, it comprises transponder and the receiver (not shown) that is connected with antenna 16, described radio-frequency module 12 forms receiving system with antenna 16, and this receiving system is used to receive the tabulation by the online user with reciprocity instant message transrecieving ability of radio net transmission.User list tape deck 13 is used to store the contact list that comprises at least one list of particular users, and wherein so-called specific user selects in the contact list of storing from portable terminal 1 of the user by portable terminal 1 in advance, for example friend or business parnter.Described list of particular users comprises such as users' such as name, sex, address, occupation personal information and friend user's mobile terminal identification information, the identification code of for example international mobile subscriber identity (IMSI), interim mobile subscriber identity (TMSI), local mobile subscriber identity (LMSI), International Mobile Equipment Identity (IMEI) and peer message transmitting-receiving.State recording device 15 is used for storing described each user's of list of particular users connection status and resource status, for example, connection status reflects each user's different conditions, such as online, off-line, busy, dormancy etc., resource status reflects each user's data transmission rate, available functional module and memory etc.According to the embodiment of the invention, state recording device 15 also can be used for storing each user's of contact list connection status and resource status.For simple description, Fig. 2 only shows functional module related to the present invention, and in these not shown other functional modules.
Fig. 3 is the flow chart that upgrades User Status in the reciprocity according to an embodiment of the invention instant message transrecieving method, comprises the steps: to open UE A (step S210); UE A is registered to UTRAN (step S220); UE A reports that to UTRAN it carries out the ability of reciprocity instant message transrecieving (step S230); UTRAN receives and determines whether described UE A has the ability (step S240) of carrying out reciprocity instant message transrecieving; If UE A has, then UTRAN adds UE A in online user's tabulation (step S250) to; UTRAN can set up online mobile subscriber's tabulation (comprising UE A) (step S260) that peer-to-peer communications is connected to UE A with UE A with transmitting such as other portable terminals such as UE B, and the distance between customer mobile terminal in the described tabulation and the portable terminal A satisfies the requirement of peer-to-peer communications, and (perhaps UTRAN can transmit the positional information of each portable terminal to UE A, UE A is according to described positional information then, whether can set up the reciprocity scope that connect within) if calculating described portable terminal, wherein said UTRAN uses broadcast transmitted online user tabulation, thereby other portable terminals (for example UE B) also may be received in the line user list and upgrade connection status.
After UE A receives described online user's tabulation, whether controller compares one by one to list of particular users of storing among the UE A and the online user's tabulation that receives, be present in the online user's tabulation that receives (step S270) with the list of particular users of checking described UEA.Similarly, also execution in step S270 of other portable terminals (for example UE B).The content that is used for comparison can be each user's a peer-to-peer communications identification code, described identification code can be the fixedly identity identification information that obtains by each users from networks with object message transmitting-receiving ability or in special time period effective user's temporary identity identifying information.For step S270, whether controller also can compare one by one to contact list of storing among the UE A and the online user's tabulation that receives, be present in the online user's tabulation that receives with the contact list of checking described UE A.
Mobile terminal UE A is according to described comparative result, each specific user's connection status record in the update mode tape deck, the User Status of the part list of particular users that is about to tabulate overlapping with the described online user who receives in the user list tape deck is updated to online (step S280), and the User Status of not tabulating the part list of particular users overlapping with the described online user who receives in the user list tape deck is updated to off-line (step S290).
Upgrade another embodiment of the flow process of User Status according to the present invention, mobile terminal UE A can report that it carries out the ability of reciprocity instant message transrecieving by direct peripherad portable terminal (for example UE B); Mobile terminal UE B receives described report, sends the identifying information feedback to described mobile terminal UE A then; The identifying information feedback of other portable terminals that mobile terminal UE A will receive is compared with the list of particular users in the user list tape deck; Portable terminal A upgrades the friend's connection status record in its state recording device according to comparative result; At last, mobile terminal UE A can according to friend's connection status with set up equity such as one of friend users such as UE B and be connected, and begin instant message transrecieving.
When the user was in reciprocity instant message transrecieving process, each portable terminal comprised two states, promptly sent information and the response of waiting for from the other side's portable terminal to the other side's portable terminal.When portable terminal is in wait from the state of the response of the other side's portable terminal, described portable terminal only sends the necessary signaling of safeguarding that reciprocity instant message transrecieving connects, such as through-put power control (TPC), dynamic channel allocation (DCA) and the same moved further (SS) of the through-put power that is used to manage and adjust base station and portable terminal.On the other hand, in order to reduce interference, when being in wait, only need to send necessary signaling from the state of the response of the other side's portable terminal to other portable terminal signals.
Fig. 4 sets up the flow chart that equity connects in the reciprocity according to an embodiment of the invention instant message transrecieving method, comprise the steps:
At first, UE A is to the request (step D310) of UE B transmission for instant message transrecieving, and the described step of having described in detail among the patent application No.03119895.3, the content of described invention are in the lump at this as a reference.UE A sends the peer link request via uplink control channel to UTRAN; After receiving described peer link request, UTRAN transmits paging information via paging channel to mobile terminal UE B, to want and its execution peer-to-peer communications to UE B notice mobile terminal UE A; UTRAN distributes with peer-to-peer communications relevant channel resource to mobile terminal UE A with UE B by downlink control channel; After the channel resource that obtains described distribution, mobile terminal UE A and UE B send the affirmation information that has obtained corresponding reciprocity resource and activated described reciprocity resource to UTRAN respectively; Simultaneously, mobile terminal UE A and UE B be by the Node B among the UTRAN, in described peer-to-peer communications in another corresponding mobile terminal transmission peering session required UE ability information, for example received power level of the sensitivity of receiver, receiver etc.; Mobile terminal UE A and UE B enter the direct communication pattern.
Then, UE A sets up equity with UE B and is connected (step S320), and this step is also described in detail in patent application No.03119895.3.After entering the direct communication description, mobile terminal UE A and UE B will enter the radio link detected state; If the link detecting success, then mobile terminal UE A and UE B are respectively by control channel between UE A and the Node B and the control channel between UE B and the Node B, the Node B acknowledge message in UTRAN.Simultaneously, UE A and UE B begin to engage in the dialogue by channel P2P-DCH.
Whether successfully UE A determines equity connection (step S330).If success, UE A begins to carry out equity chat (step S340) with UE B.Detecting after link cost and terminal UE A and UE B enter peer-to-peer communications, UE A and UE B still need continue to monitor the performance of peer-to-peer communication link in the peer-to-peer communications process, so that safeguard reciprocity dedicated radio link; If equity connects unsuccessful, then UE A discharges corresponding reciprocity resource, and upgrades the state (step S350) of UE B in its state recording device 15.
Fig. 5 is the schematic diagram at reciprocity according to an embodiment of the invention instant message transrecieving mobile terminal user interface.For example, show described user interface on the display unit of mobile terminal UE A, described user interface comprises information input window 405, first information display window 401 and second information display window 403.Information input window 405 is adaptive for the user who uses UE A imports information such as relevant words, figure.First information display window 401 is used to show the input information of described UE A and the identification information of using the user of UE A, for example head portrait, name, telephone number etc.Similarly, second information display window 403 is used to show information and the identification information of using the user of UE B, for example head portrait, name, the telephone number etc. that sent by other portable terminals of carrying out instant message transrecieving such as UE B etc. and UE A.
Fig. 6 is the schematic diagram at reciprocity according to another embodiment of the present invention instant message transrecieving mobile terminal user interface.For example, show described user interface on the display unit of mobile terminal UE A, described user interface comprises information display window 411, information input window 413, online user's list display window 415 and offline user list display window 417.Wherein information display window 411 is used to show all users' that participate in instant message transrecieving chat record; Information input window 413 is adaptive for the user who uses UE A imports information such as relevant words, figure, after these message transmission, is presented in the information display window 411.Online user's list display window 415 is used for showing that the list of particular users of UE A can set up the online user's that equity be connected tabulation with UE A, thereby UE A can be according to described online user tabulation, and sets up equity such as one of portable terminals such as UE B and is connected; And offline user list display window 417 is used for showing the tabulation of all offline users of list of particular users of UE A.
Reciprocity instant message transrecieving method provided by the invention and portable terminal also can support any to multiple spot and multi-multipoint instant message transrecieving, that is, portable terminal can be carried out reciprocity instant message transrecieving with many portable terminals simultaneously.
It should be appreciated by those skilled in the art that under the prerequisite that does not deviate from content of the present invention can carry out multiple improvement to disclosed reciprocity instant message transrecieving method and portable terminal among the present invention, protection scope of the present invention should be defined by the following claims.
Claims (13)
1. reciprocity instant message transrecieving method that is used for portable terminal, described portable terminal comprise the contact list of storage in advance, and the described contact list of storage in advance comprises at least one list of particular users, and described method comprises step:
(a) reception has the online user's of reciprocity instant message transrecieving ability tabulation, and described online user's tabulation is sent by radio net;
(b) described list of particular users is compared with the described online user's tabulation that receives;
(c) according to described comparative result, upgrade the connection status record of each user in the described list of particular users, so that portable terminal according to the connection status record of described renewal, is set up reciprocity instant message transrecieving with at least one customer mobile terminal in the described list of particular users.
2. reciprocity instant message transrecieving method as claimed in claim 1 is wherein crossed Cell Broadcast CB by radio network and is come the online user in the transmitting step (a) to tabulate.
3. reciprocity instant message transrecieving method as claimed in claim 1, wherein step (c) comprises and will be updated to online with the described online user overlapping that part of user's connection status record of tabulating in the described list of particular users.
4. reciprocity instant message transrecieving method as claimed in claim 1, wherein step (c) comprises and will be updated to off-line with described online user nonoverlapping that part of user's connection status record of tabulating in the described list of particular users.
5. reciprocity instant message transrecieving method as claimed in claim 1, wherein said list of particular users is described contact list.
6. reciprocity instant message transrecieving method that is used for portable terminal, described portable terminal comprise the contact list of storage in advance, and the described contact list of storage in advance comprises at least one list of particular users, and described method comprises step:
(a) report reciprocity instant message transrecieving ability to other portable terminals;
(b) receive the identification information feedback that sends by described other portable terminals respectively;
(c) described list of particular users is compared with the described identification information feedback that receives;
(d) according to described comparative result, upgrade the connection status record of each user in the described list of particular users, so that described portable terminal according to the connection status record of described renewal, is set up reciprocity instant message transrecieving with at least one customer mobile terminal in the described list of particular users.
7. portable terminal that is used for reciprocity instant message transrecieving comprises:
Receiving system is used to receive the tabulation by the online user with reciprocity instant message transrecieving ability of radio net transmission;
The user list tape deck is used to store contact list, and described contact list comprises at least one list of particular users;
The state recording device is used for writing down described each user's of list of particular users connection status; And
Controller is used for the described online user's tabulation that receives is compared with described list of particular users.
8. portable terminal as claimed in claim 7 also comprises the display unit that is used for the explicit user interface, and described user interface comprises:
Information input window is used for input information;
Information display window is used to show the information of described input;
Online user's list display window is used for showing that described list of particular users can set up the online user's that equity be connected tabulation with described portable terminal.
9. portable terminal as claimed in claim 8, wherein said user interface also comprise the offline user list display window of the tabulation that is used for showing the contact list offline user.
10. portable terminal as claimed in claim 7 also comprises the display unit that is used for the explicit user interface, and described user interface comprises:
Information input window is used for input information;
First information display window is used to show the information of described input;
Second information display window is used to show the information that is sent by other portable terminals.
11. portable terminal as claimed in claim 10, wherein the first information display window and second information display window also are used for showing respectively the identification information of described portable terminal and described other portable terminals.
12. portable terminal as claimed in claim 7, wherein said contact list comprise each user's the personal information and the identification information of each customer mobile terminal.
13. portable terminal as claimed in claim 7, wherein said controller are used for upgrading the connection status of each user in the described contact list according to described comparative result.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2005800449787A CN101091362B (en) | 2004-12-28 | 2005-12-15 | Method and apparatus for peer-to-peer instant messaging |
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| CN200410011522.8 | 2004-12-28 | ||
| CN200410011522 | 2004-12-28 | ||
| PCT/IB2005/054254 WO2006070300A2 (en) | 2004-12-28 | 2005-12-15 | Method and apparatus for peer-to-peer instant messaging |
| CN2005800449787A CN101091362B (en) | 2004-12-28 | 2005-12-15 | Method and apparatus for peer-to-peer instant messaging |
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| CN101091362A true CN101091362A (en) | 2007-12-19 |
| CN101091362B CN101091362B (en) | 2012-07-04 |
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| CN2005800449787A Active CN101091362B (en) | 2004-12-28 | 2005-12-15 | Method and apparatus for peer-to-peer instant messaging |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102291330A (en) * | 2011-09-20 | 2011-12-21 | 苏州阔地网络科技有限公司 | Equipment and method for realizing user session synchronization during instant communication |
| CN102291331A (en) * | 2011-09-20 | 2011-12-21 | 苏州阔地网络科技有限公司 | Equipment and method for realizing user session synchronization during instant communication |
| CN102291332A (en) * | 2011-09-20 | 2011-12-21 | 苏州阔地网络科技有限公司 | Synchronization equipment and method for realizing user session in instant communication |
| CN102325020A (en) * | 2011-09-20 | 2012-01-18 | 苏州阔地网络科技有限公司 | User session synchronization equipment and method in instant communication |
| CN102347915A (en) * | 2011-09-27 | 2012-02-08 | 苏州阔地网络科技有限公司 | User session synchronization equipment and method |
| CN102387194A (en) * | 2011-09-27 | 2012-03-21 | 苏州阔地网络科技有限公司 | Device and method for synchronizing user session |
| CN102802211A (en) * | 2011-02-24 | 2012-11-28 | 英特尔公司 | Techniques for augmented functionality by sharing wireless resources |
| CN110336741A (en) * | 2019-08-20 | 2019-10-15 | 深圳市中仁信息科技有限公司 | A kind of optimization method of the Kad algorithm suitable for P2P instant messaging |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1104965B1 (en) * | 1999-12-02 | 2007-02-28 | Sony Deutschland GmbH | Protocol for instant messaging |
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2005
- 2005-12-15 CN CN2005800449787A patent/CN101091362B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102802211A (en) * | 2011-02-24 | 2012-11-28 | 英特尔公司 | Techniques for augmented functionality by sharing wireless resources |
| CN102802211B (en) * | 2011-02-24 | 2015-05-06 | 英特尔公司 | Techniques for augmented functionality by sharing wireless resources |
| CN102291330A (en) * | 2011-09-20 | 2011-12-21 | 苏州阔地网络科技有限公司 | Equipment and method for realizing user session synchronization during instant communication |
| CN102291331A (en) * | 2011-09-20 | 2011-12-21 | 苏州阔地网络科技有限公司 | Equipment and method for realizing user session synchronization during instant communication |
| CN102291332A (en) * | 2011-09-20 | 2011-12-21 | 苏州阔地网络科技有限公司 | Synchronization equipment and method for realizing user session in instant communication |
| CN102325020A (en) * | 2011-09-20 | 2012-01-18 | 苏州阔地网络科技有限公司 | User session synchronization equipment and method in instant communication |
| CN102347915A (en) * | 2011-09-27 | 2012-02-08 | 苏州阔地网络科技有限公司 | User session synchronization equipment and method |
| CN102387194A (en) * | 2011-09-27 | 2012-03-21 | 苏州阔地网络科技有限公司 | Device and method for synchronizing user session |
| CN110336741A (en) * | 2019-08-20 | 2019-10-15 | 深圳市中仁信息科技有限公司 | A kind of optimization method of the Kad algorithm suitable for P2P instant messaging |
| CN110336741B (en) * | 2019-08-20 | 2021-05-18 | 深圳市中仁信息科技有限公司 | Kad algorithm optimization method suitable for P2P instant messaging |
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| CN101091362B (en) | 2012-07-04 |
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