WO2011114584A1 - Procédé de partage d'informations et terminaux de communication - Google Patents

Procédé de partage d'informations et terminaux de communication Download PDF

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Publication number
WO2011114584A1
WO2011114584A1 PCT/JP2010/071629 JP2010071629W WO2011114584A1 WO 2011114584 A1 WO2011114584 A1 WO 2011114584A1 JP 2010071629 W JP2010071629 W JP 2010071629W WO 2011114584 A1 WO2011114584 A1 WO 2011114584A1
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WO
WIPO (PCT)
Prior art keywords
information
communication terminal
notification message
communication
common
Prior art date
Application number
PCT/JP2010/071629
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English (en)
Japanese (ja)
Inventor
啓文 植田
範人 藤田
Original Assignee
日本電気株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 日本電気株式会社 filed Critical 日本電気株式会社
Priority to JP2012505451A priority Critical patent/JP5803904B2/ja
Publication of WO2011114584A1 publication Critical patent/WO2011114584A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/06—Optimizing the usage of the radio link, e.g. header compression, information sizing, discarding information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/18—Information format or content conversion, e.g. adaptation by the network of the transmitted or received information for the purpose of wireless delivery to users or terminals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W68/00—User notification, e.g. alerting and paging, for incoming communication, change of service or the like

Definitions

  • the present invention relates to an information sharing method and a communication terminal for sharing information.
  • a mobile communication terminal in the network detects another mobile communication terminal, it exchanges SVs with each other and grasps the contents of the SV of the other mobile communication terminal. Then, based on the received SV, the content that the mobile communication terminal does not have is investigated and an attempt is made to acquire the content.
  • terminals T1 and T2 which are mobile communication terminals
  • terminals T1 and T2 which have come into contact with each other exchange SV 1000 with each other.
  • the terminal T2 confirms the difference content by comparing the SV received from the terminal T1 with the SV of the terminal T2 to determine whether there is content that the terminal T2 does not have.
  • Non-Patent Document 2 SV transmission intervals and exchange methods are determined for the purpose of reducing the bandwidth load (see, for example, Non-Patent Document 2).
  • Non-Patent Document 2 describes a basic epidemic algorithm exchange method.
  • epidound round or cycle
  • information is exchanged at each interval.
  • the information exchange operation includes a unidirectional exchange such as a Push type in which only the own terminal transmits information to the adjacent terminal, and a Pull type in which information is collected from the adjacent terminal only to the own terminal, and an event is detected for the adjacent terminal (There is a Push-Pull type two-way exchange in which the Push type and Pull type are exchanged simultaneously when new holding information is recognized.
  • an epidemic algorithm defines an information exchange interval.
  • FIG. 2 is a diagram illustrating an example of a state of information propagation using the epidemic algorithm.
  • the content received by the terminal Ta from the terminal T can be received by the terminal Tb by the SV transmitted from the terminal Ta to the terminal Tb.
  • the content propagation to the terminal Tc is not performed until the regular transmission time of the SV of the terminal Tb and the terminal Tc.
  • the above-described technique has a problem in that after transmitting information from a communication terminal to a communication terminal adjacent to the communication terminal, the communication terminal that has received the information cannot quickly transmit the information. The reason is that each communication terminal transmits information according to a regular transmission interval.
  • Change processing for transmitting the changed notification message to the other communication terminal When the communication terminal does not have the common information as a result of the investigation, a process of transmitting the notification message to the other communication terminal without changing the notification message; Whether the communication terminal needs to transmit the notification message based on the received notification message and information held by the communication terminal when the communication message is received by the other communication terminal.
  • Change notification message for notifying the information held by the terminal to the other communication terminal, change processing to send the changed notification message to the other communication terminal,
  • the communication terminal does not have the common information as a result of the investigation, a process of transmitting the notification message to the other communication terminal without changing the notification message; Whether the communication terminal needs to transmit the notification message based on the received notification message and information held by the communication terminal when the communication message is received by the other communication terminal.
  • the process of determining When it is determined that the notification message needs to be transmitted, the notification message is transmitted.
  • the communication terminal of the present invention A communication terminal having a wireless communication function, When transmitting to the other communication terminal a notification message for notifying the information held by the communication terminal to other communication terminals within a range communicable with the communication terminal, the information held by the communication terminal Investigating whether there is information common to the information held by the other communication terminal, and if there is the common information as a result of the investigation, select at least one information from the common information, A priority control unit that changes the notification message so as not to notify the selected information to the other communication terminal; When the notification message transmitted by the other communication terminal is received, the exchange detection for determining whether the notification message needs to be transmitted based on the received notification message and information held by the communication terminal And As a result of the investigation by the priority control unit, when there is the common information, the message changed by the priority control unit is transmitted to the other communication terminal, and when there is no common information, the notification message is not changed. And an information exchange unit for transmitting the notification message when the exchange detection unit determines that the notification message needs to be transmitted.
  • the communication terminal of the present invention A communication terminal having a wireless communication function, Among the information held by the communication terminal, a request processing unit that determines whether information requested from another communication terminal within a range in which communication with the communication terminal can be performed is high-priority information; An information exchange unit for transmitting the requested information to the other communication terminal; If the request processing unit determines that the requested information is high-priority information, the information exchange unit transmits the requested information to the other communication terminal, and then the communication terminal holds the information.
  • information can be quickly transmitted to other communication terminals existing around the communication terminal.
  • the summary vector (hereinafter referred to as SV) is a notification message that includes information held by a communication terminal that is a mobile communication terminal, and the communication terminals notify each other of the held information.
  • FIG. 3 is a diagram showing a first example of SV.
  • the SV 10a is a data inclusion type composed of a terminal ID which is identification information for identifying a communication terminal, position information indicating the position of the communication terminal, and a time existing at the position. .
  • FIG. 4 is a diagram showing a second example of SV.
  • the SV 10b may use summary information (replaced with content hash values, identifiers, and alternative information) of content held by terminals in the network.
  • the SV 10b is converted into a hash value, for example. It becomes a hash table type including the listed information composed of the processed data.
  • the SV is not only periodically transmitted from the communication terminal, but when an event shown below is detected by exchanging the SV between the communication terminal and another adjacent communication terminal, the communication terminal To voluntarily transmit SV. 1. 1. When a new communication terminal is detected 2. When the own communication terminal holds information that the received SV does not have 3. When the received SV has information older than the information held by the own communication terminal. Transmission at a preset period As described above, by exchanging SVs, information held by other communication terminals can be monitored by the communication terminals. (First embodiment) The SV exchange in the first embodiment will be described on the assumption that, as shown in FIG. 3, data such as position information is written in the SV, the information is directly transmitted, and no content acquisition request is made.
  • FIG. 5 is a diagram showing a first embodiment of a communication terminal according to the present invention.
  • the internal configuration of communication terminal 100-2 is the same as the internal configuration of communication terminal 100-1 shown in FIG.
  • the information exchange unit 111 receives information (SV, content acquisition request and response, content information, terminal location information) from another mobile communication terminal (for example, the communication terminal 100-2) through the wireless communication function unit 110,
  • the communication terminal 100-1 has a function of periodically transmitting content information and SV held by the communication terminal 100-1.
  • the information exchange unit 111 receives an SV transmitted from another communication terminal, the received SV is stored in the data storage unit 121 via the exchange detection unit 131 of the exchange control unit 130.
  • an SV is transmitted from the information exchange unit 111
  • an SV transmission notification is received from the exchange detection unit 131 other than the SV is periodically transmitted, or information is missing from the priority control unit 132 of the exchange control unit 130.
  • the received SV is received, the SV is transmitted.
  • the data storage unit 121 records the content and SV created by the communication terminal 100-1, the content acquired through the information exchange unit 111 and the SV received through the exchange detection unit 131, the function of storing and deleting the reception history, It has a function to manage the priority and importance of data. This priority and importance are set in advance.
  • the data storage unit 121 integrates the received SV and the saved SV of the communication terminal 100-1. For example, the information in the SV of the communication terminal 100-1 is compared with the information in the SV of the communication terminal 100-1. If new information on the update date / time is in the reception SV, the information in the SV of the corresponding communication terminal 100-1 is overwritten. If there is newly obtained information, it is added and updated in the SV of the communication terminal 100-1.
  • the data storage unit 121 when the data storage unit 121 receives a notification of information transmission from the information exchange unit 111, the data storage unit 121 sends the corresponding information to the information exchange unit 111.
  • the data storage unit 121 when the data storage unit 121 receives an information acquisition notification from the priority control unit 132, the data storage unit 121 sends the corresponding information to the priority control unit 132.
  • the exchange control unit 130 is provided with an exchange detection unit 131 and a priority control unit 132.
  • the communication terminal 100-1 When the communication terminal 100-1 holds information with high importance or high priority and wants to transmit the information quickly (whether or not priority is given to the content itself (high or low priority or priority). ) Is specified in advance or is instructed by a user or an application), the communication terminal 100-1 is newly set so as to immediately start transmission of the SV to the adjacent communication terminal 100-2. Has a function of changing and creating the SV transmitted.
  • the priority control unit 132 reads, from the data storage unit 121, the history of the SV received from the adjacent terminal that wants to immediately transmit the SV, and confirms the information in the SV that is common with the information held by the priority control unit 132. Then, at least one piece of common information is selected from the SV of the current communication terminal 100-1 and changed.
  • the update date / time and generation date / time that is considered to have already been shared with the adjacent terminal in the SV of the communication terminal 100-1 or the time set in advance from the acquisition time
  • the above-described processing may be performed on information. If there is no information common to the SV of the communication terminal 100-1 and the SV of the adjacent terminal, no change is made to the SV.
  • the priority control unit 132 sends a transmission notification and the created SV to the information exchange unit 111, and the information exchange unit 111 creates the SV created without waiting for the regular transmission of the SV or the regular transmission of the SV.
  • the exchange detection unit 131 of the communication terminal 100-2 is caused to detect the lack of information of the communication terminal 100-1 and indirectly transmit the SV.
  • FIG. 6 is a diagram illustrating an example of an ad hoc network including the communication terminal 100-1 illustrated in FIG.
  • an information sharing method for sharing information in this embodiment
  • the description format of the SV for notifying possession information will be described by taking an example of using the data inclusion type SV 10a shown in FIG.
  • the changing method applied to the SV will be described by taking as an example the case of using a process for extracting information.
  • step 1 the priority control unit 132 of the communication terminal 100-1 investigates the SV reception history stored in the data storage unit 121, and the communication terminal 100-, which is an adjacent terminal of the communication terminal 100-1. 2 reads information held. Then, in step 2, the information held in common between the information held by the current communication terminal 100-1 and the information held by the communication terminal 100-2 is investigated.
  • the communication terminal 100-2 When the communication terminal 100-2 receives the SV with missing information from the communication terminal 100-1, the communication terminal 100-1 deletes information common to the communication terminal 100-1 and the communication terminal 100-2, and the communication terminal 100-1 Since the SV is transmitted, the above-described spontaneous SV transmission event “2. When the own communication terminal holds information that the reception SV does not hold” is detected. Thereby, the communication terminal 100-2 updates the SV of the communication terminal 100-2 based on the information received from the communication terminal 100-1, and then enters a process of immediately transmitting its own SV, and transmits the SV. (FIG. 8, lower row (A)).
  • information that is shared with the neighboring terminal is transmitted to the neighboring terminal so that the neighboring terminal can exchange information immediately.
  • the information is replaced with old information or alternative information such as a hash value. It may be replaced with.
  • the time stamp indicating the newness of information or the sequence number is replaced with an older one than the current one (the past time if it is a time stamp, or a smaller value if it is a sequence number), and the SV is immediately sent to the adjacent terminal. It is possible to obtain the same effect even if the transmission of is promoted.
  • FIG. 11 and FIG. 12 are diagrams showing how information is exchanged between three communication terminals in the second embodiment.
  • the communication terminal 100a-1 transmits the summary vector SV (X, Y) of the communication terminal 100a-1 in which the hash values of the contents X and Y are described as the regular transmission of the SV. Then, the communication terminal 100a-2 that has received the SV from the communication terminal 100a-1 compares the SV of the communication terminal 100a-2 with the received SV. As a result, it is recognized that the communication terminal 100a-1 holds “content Y”, which is information that the communication terminal 100a-2 does not hold (middle (a) in FIG. 11).
  • the request processing unit 133 reads the priority of the content registered in advance from the data storage unit 121 and reads whether the received acquisition request information should be immediately propagated. Judge based on degree. For example, information such as finding a rescuer in a stricken area is determined as information that should be propagated immediately. In addition, when the priority is evaluated as large, medium, or small, it can be considered that the information is propagated immediately with “high”.
  • the request processing unit 133 determines in step 11 that the information is not to be propagated immediately, the request processing unit 133 transmits the content Y corresponding to the content acquisition request to the information exchange unit 111a.
  • the priority control unit 132a is not notified of the priority control start.
  • the information exchanged by the neighboring terminal is transmitted by transmitting the SV in which the information held in common with the neighboring terminal is deleted.
  • the information is immediately exchanged with the neighboring terminal, but the information may be replaced with the old one.
  • a time stamp indicating the newness of information or a sequence number that is older than the current one (replaced time in the past if the time stamp is used, or a smaller value if the sequence number is used) is immediately transmitted to the adjacent terminal. It is possible to obtain the same effect even if the transmission of is promoted.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Information Transfer Between Computers (AREA)
  • Telephone Function (AREA)
  • Telephonic Communication Services (AREA)

Abstract

Lorsqu'un message de notification doit être transmis à un terminal de communication (100-2), une unité de gestion des priorités (132) d'un terminal de communication (100-1) change le message de notification de telle sorte qu'au moins un de ces éléments d'informations qui sont enregistrés dans le terminal de communication (100-1) et dans le terminal de communication (100-2), et en outre communs à ceux-ci, ne soit pas notifié. Lorsqu'un message de notification a été reçu à partir du terminal de communication (100-2), une unité de détection d'échange (131) du terminal de communication (100-1) détermine, sur la base du message de notification reçu et de ces éléments d'informations qui sont enregistrés dans le terminal de communication (100-1), si un message de notification doit être transmis. S'il existe des éléments d'informations communs, une unité d'échange d'informations (111) transmet, au terminal de communication (100-2), le message tel qu'il a été changé par l'unité de gestion des priorités (132). S'il n'existe pas d'éléments d'informations communs, l'unité d'échange d'informations (111) transmet, au terminal de communication (100-2), le message de notification sans aucun changement. Si l'unité de détection d'échange (131) détermine que le message de notification doit être transmis, le message de notification est alors transmis.
PCT/JP2010/071629 2010-03-18 2010-12-03 Procédé de partage d'informations et terminaux de communication WO2011114584A1 (fr)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014061314A1 (fr) * 2012-10-16 2014-04-24 日本電気株式会社 Procédé de distribution de contenu
WO2014076877A1 (fr) 2012-11-19 2014-05-22 日本電気株式会社 Système de partage de données
WO2014128808A1 (fr) * 2013-02-22 2014-08-28 日本電気株式会社 Système de partage de données
JP2016031594A (ja) * 2014-07-28 2016-03-07 日本電気株式会社 通信端末、通信制御方法およびプログラム
EP2921966A4 (fr) * 2012-11-19 2016-11-23 Nec Corp Système de partage de données
EP3239850A4 (fr) * 2014-12-25 2018-08-01 Nec Corporation Terminal de communication, système de distribution de contenu, procédé de distribution de contenu, et programme de commande de terminal de communication

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JP2004135051A (ja) * 2002-10-10 2004-04-30 Sony Corp 情報処理システム、サービス提供装置および方法、情報処理装置および方法、記録媒体、並びにプログラム
JP2005258582A (ja) * 2004-03-09 2005-09-22 Nec Corp 情報管理システム、装置、およびプログラム
JP2008028455A (ja) * 2006-07-18 2008-02-07 Ntt Docomo Inc サービス制御装置
JP2008060885A (ja) * 2006-08-31 2008-03-13 Nec Corp 伝言システム、伝言システム制御方法、及びプログラム

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JP2004135051A (ja) * 2002-10-10 2004-04-30 Sony Corp 情報処理システム、サービス提供装置および方法、情報処理装置および方法、記録媒体、並びにプログラム
JP2005258582A (ja) * 2004-03-09 2005-09-22 Nec Corp 情報管理システム、装置、およびプログラム
JP2008028455A (ja) * 2006-07-18 2008-02-07 Ntt Docomo Inc サービス制御装置
JP2008060885A (ja) * 2006-08-31 2008-03-13 Nec Corp 伝言システム、伝言システム制御方法、及びプログラム

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014061314A1 (fr) * 2012-10-16 2014-04-24 日本電気株式会社 Procédé de distribution de contenu
KR20150070305A (ko) * 2012-10-16 2015-06-24 닛본 덴끼 가부시끼가이샤 콘텐츠 전달 방법
KR101692654B1 (ko) 2012-10-16 2017-01-03 닛본 덴끼 가부시끼가이샤 콘텐츠 전달 방법
WO2014076877A1 (fr) 2012-11-19 2014-05-22 日本電気株式会社 Système de partage de données
EP2921967A4 (fr) * 2012-11-19 2016-07-20 Nec Corp Système de partage de données
EP2921966A4 (fr) * 2012-11-19 2016-11-23 Nec Corp Système de partage de données
US9807780B2 (en) 2012-11-19 2017-10-31 Nec Corporation Data sharing system
WO2014128808A1 (fr) * 2013-02-22 2014-08-28 日本電気株式会社 Système de partage de données
JPWO2014128808A1 (ja) * 2013-02-22 2017-02-02 日本電気株式会社 データ共有システム
JP2016031594A (ja) * 2014-07-28 2016-03-07 日本電気株式会社 通信端末、通信制御方法およびプログラム
EP3239850A4 (fr) * 2014-12-25 2018-08-01 Nec Corporation Terminal de communication, système de distribution de contenu, procédé de distribution de contenu, et programme de commande de terminal de communication

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