WO2006083070A1 - Procede et systeme d'identification de serveur a fonction de commande - Google Patents

Procede et systeme d'identification de serveur a fonction de commande Download PDF

Info

Publication number
WO2006083070A1
WO2006083070A1 PCT/KR2005/003308 KR2005003308W WO2006083070A1 WO 2006083070 A1 WO2006083070 A1 WO 2006083070A1 KR 2005003308 W KR2005003308 W KR 2005003308W WO 2006083070 A1 WO2006083070 A1 WO 2006083070A1
Authority
WO
WIPO (PCT)
Prior art keywords
server
session
controlling function
clients
designated
Prior art date
Application number
PCT/KR2005/003308
Other languages
English (en)
Inventor
Young-Ae Kim
Young-Hwan Park
Kang-Suk Huh
Hee-Joung Lee
Original Assignee
Lg Electronics Inc.
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
Priority claimed from KR1020050005155A external-priority patent/KR100690871B1/ko
Application filed by Lg Electronics Inc. filed Critical Lg Electronics Inc.
Priority to BRPI0517292-6A priority Critical patent/BRPI0517292A/pt
Priority to CA002584180A priority patent/CA2584180A1/fr
Priority to EP05856461A priority patent/EP1805655A1/fr
Priority to JP2007537793A priority patent/JP2008517396A/ja
Publication of WO2006083070A1 publication Critical patent/WO2006083070A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/40—Support for services or applications
    • H04L65/4061—Push-to services, e.g. push-to-talk or push-to-video
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/1066—Session management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/1066—Session management
    • H04L65/1069—Session establishment or de-establishment
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/40—Support for services or applications
    • H04L65/403—Arrangements for multi-party communication, e.g. for conferences
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/01—Protocols
    • H04L67/10—Protocols in which an application is distributed across nodes in the network
    • H04L67/1001—Protocols in which an application is distributed across nodes in the network for accessing one among a plurality of replicated servers
    • H04L67/1004—Server selection for load balancing
    • H04L67/1008—Server selection for load balancing based on parameters of servers, e.g. available memory or workload
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/01—Protocols
    • H04L67/10—Protocols in which an application is distributed across nodes in the network
    • H04L67/1001—Protocols in which an application is distributed across nodes in the network for accessing one among a plurality of replicated servers
    • H04L67/1004—Server selection for load balancing
    • H04L67/1014—Server selection for load balancing based on the content of a request
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/10—Architectures or entities
    • H04L65/1016—IP multimedia subsystem [IMS]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/01—Protocols
    • H04L67/10—Protocols in which an application is distributed across nodes in the network
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/01—Protocols
    • H04L67/10—Protocols in which an application is distributed across nodes in the network
    • H04L67/1001—Protocols in which an application is distributed across nodes in the network for accessing one among a plurality of replicated servers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
    • H04W4/10—Push-to-Talk [PTT] or Push-On-Call services
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/40—Connection management for selective distribution or broadcast
    • H04W76/45—Connection management for selective distribution or broadcast for Push-to-Talk [PTT] or Push-to-Talk over cellular [PoC] services

Definitions

  • the present invention relates to a PT (push-to) service, and more particularly, to a method and system for determining a server having a controlling function capable of allocating a controlling function to a PT server serving a PT server region having the most session-established PT clients.
  • a PT service is intended to provide rapid communications for business and consumers of mobile networks.
  • the PT service can be a push to talk over cellular (PoC) for providing a call service by sending voice data, a push to view (PTV) for sending moving picture (video) data, or a communication service such as a push to data (PTD) for sending data.
  • PoC push to talk over cellular
  • TV push to view
  • PTD push to data
  • a PT client e.g., a client supporting a PT service
  • media data voice, video, data, etc.
  • the PT client that wishes to transmit the media data transmits a request for a talk burst (a talk burst request message) to an associated PT server. Once the PT client receives the permission, then the PT client sends media data to one or more other PT clients with which a session has been established.
  • the PT service allows user voice, moving picture and data communications to be shared with a single recipient (1-to-l) or between groups of recipients as in a group chat session (1 -to-many), and uses a session initiation protocol (SIP) to establish a session.
  • SIP session initiation protocol
  • a PT client (a client supporting a PT service) having a transmission authority among session-established clients transmits media through a PT server, and the other PT clients participating in the session receive the sent media.
  • a PT server can perform either a controlling function
  • Controlling PoC Function or a participating function (Participating PoC Function), or can perform both the controlling function and the participating function.
  • controlling function and participating function are known in the art.
  • the process/software/hardware responsible for implementing each of the controlling function and the participating function in the PT server is referred to as a controlling function part and a participating function part, respectively.
  • the controlling function part provides a centralized session handling, a media distribution, a talk burst control including a talker identification, a policy enforcement for participation in group sessions, and participant information.
  • the participating function part provides a session handling and a policy enforcement for an incoming session, and may provide a media relay function and a talk burst control message relay function between the PT client and the controlling function part.
  • the PT server includes n-participating function parts one-to-one corresponding to the n-PT clients (i.e., one participating function part for one PT client), and one controlling function part for controlling the PT clients through the participating function parts.
  • the controlling function part and the participating function parts can exist in different PT servers depending on whether the clients participating in a session belong to one PT server region or to multiple PT server regions.
  • PT server among the different PT servers associated with the session-participating PT clients, should have the controlling function (i.e., should perform the controlling function) is determined during a PT session setup, and the determined PT server performs the controlling function for the duration of the entire PT session.
  • a PT server that has session-established with a user that requests the initialization of a session is automatically and always determined as the PT server having the controlling function.
  • a PT server having a database for a group session or a PT server having a group identity is always and automatically determined as the PT server having the controlling function.
  • FIGURE 1 is an exemplary view showing one example of a PT system according to a related art, wherein a PT server having a controlling function is determined by the above related art PT server determining method.
  • FIGURE 1 shows the amount of traffic (number of media sets) generated in case of implementing a PT service by session-establishing PT clients that belong to different PT server regions.
  • One network may include one PT server region or multiple PT server regions.
  • a first PT server 10 covering a first PT server region is determined to always have the controlling function, e.g., because the first PT server 10 serves a first PT client 11 initiating the session.
  • the first PT client 11 that belongs to the first PT server region generates voice of one word.
  • the arrow and the number in a box (31-36) between the first PT server region and a second PT server region and between the bearer packet network and the PT server denote respectively the transmission direction of media (voice) and the amount of traffic generated.
  • the first PT server 10 having the controlling function generates traffic (sets of media) as much as the number of the PT clients that are supposed to receive the voice (36, 32), in order to transmit the voice to all other the PT clients 13, 15, 21, 23, 25, 27, 29, and 31.
  • the first PT server 10 in order to transmit the voice from the first PT client 11 to the second and third PT clients 13 and 15 of the first PT server region, the first PT server 10 generates two sets of media traffic (36) - one for the second PT client 13 and the other for the third PT client 15. Also, in order to transmit the voice from the first PT client 11 to the six PT clients 21, 23, 25, 27, 29, and 31 that exist in the second PT server region, the first PT server 10 generates six separate sets of media/traffic (32) and transmits them to the second PT server region through the bearer packet network 16 (33).
  • the six sets of media traffic transmitted to the second PT server region are then transmitted to a second PT server 20 through a bearer packet network 26 (34).
  • the second PT server 20 then transmits the voice (six separate sets of media) respectively to the session-established six PT clients 21, 23, 25, 27, 29, and 31 in the second PT server region through the bear packet network 26 (35).
  • the first PT server 10 performs both the controlling function and the participating function since it receives the original voice from the first PT client 11 and also distributes it to other PT clients, whereas the second PT server 20 performs only the participating function.
  • the method of determining a controlling server (server having a controlling server) according to the related art does not produce an efficient and effective PT system.
  • the amount of every traffic generated in the PT system is not considered at all. This is a problem since it results in the generation of an unnecessarily large amount of traffic (27 sets of traffic in the example of FIGURE 1). This increases system load and results in a lower transmission time for the session-established PT clients.
  • the related art method places serious burden on the network system and inconveniences users since the media communication may be delayed or even lost. Disclosure of Invention Technical Problem
  • an object of the present invention is to provide a method and system for determining a PT server having a controlling function, which are capable of decreasing the amount of traffic generated when media (e.g., signals, voice, video, data, etc.) is transmitted between session-established PT clients.
  • media e.g., signals, voice, video, data, etc.
  • Another object of the present invention is to provide a method and system for determining a PT server having a controlling function, which overcome the limitations and disadvantages associated with the related art.
  • a method for determining a server having a controlling function which can comprise: inviting at least one PT client to a session by a specific PT client; certifying the number of the invited PT clients on the basis of a PT server region by a PT server; and determining a PT server of a PT server region having the most PT clients as a PT server having a controlling function by the PT server.
  • a PT server of a PT server region to which a PT client initiating the session belongs can make the determination of which PT server, among the multiple PT servers serving the session-establishing PT clients, should have the controlling function.
  • a PT server including a group identity or a PT server that requests an address list of PT client(s) corresponding to the group identity from a database can make the determination of which PT server should have the controlling function.
  • This determination can be made dynamically throughout the session such that the role of performing the controlling function can be switched from one PT server to another during the session depending on the circumstances, e.g., as the numbers of session-participating (session-invited) clients being served by the PT servers change throughout the session.
  • a method for determining a server having a controlling function for a session among at least two clients served by different servers comprising: designating one of the different servers to be a server having a controlling function based on invited client information associated with the session, wherein the designated server is a server serving a highest number of clients invited to the session among the different servers.
  • a method for determining a server having a controlling function for a session among at least two clients served by at least two different servers comprising: determining which server serves most clients invited to the session among the at least two different servers; and designating the determined server to be a server having a controlling function.
  • a method for determining a server having a controlling function for a session among at least two clients served by at least two different servers comprising: changing, during the session, a designation of a server having a controlling function among the at least two different servers serving the at least two clients invited to the session, based on participating client information associated with the session.
  • a method of determining a server having a controlling function among a plurality of PT (push-to) servers comprising: transmitting an invite message by a specific PT client; determining, by a PT server serving the specific PT client, the number of session- invited PT clients belonging to each of the PT servers for a session; and designating, by the specific PT server, a PT server having the most session-invited PT clients to have a controlling function, based on the determination result.
  • a method for determining a server having a controlling function comprising: tran smitting, by a specific PT (push-to) client, an invite message including a group identifier (ID) for identifying a group associated with a session; designating, by a PT server having the group ID, a PT server having a controlling function among a plurality of PT servers serving PT clients belonging to the group identified by the group ID, wherein the designated server is a server having most clients invited to the session among the plurality of PT servers; and transmitting, by the designated PT server having the controlling function, an invite message to each PT client belonging to the group.
  • a group identifier ID
  • a system for determining a server having a controlling function comprising: a plurality of servers serving a plurality of clients in different server regions, the plurality of clients being invited to a session, wherein one of the servers is configured to designate one of the servers to be a server having a controlling function based on invited client information associated with the session, wherein the designated server is a server serving a highest number of clients invited to the session among the plurality of servers.
  • a system for determining a server having a controlling function comprising: a plurality of servers serving a plurality of clients in different server regions, the plurality of clients being invited to a session, wherein one of the servers is configured to determine which server serves most clients invited to the session among the plurality of servers, and to designate the determined server to be a server have a controlling function.
  • a device for determining a server having a controlling function for a session among at least two clients served by at least two different servers comprising: a processor configured to change during the session a designation of a server having a controlling function among the at least two different servers serving the at least two clients invited to the session, based on participating client information associated with the session.
  • FIGURE 1 is an exemplary view showing an amount of media traffic generated in a
  • FIGURE 2 is an exemplary view showing an amount of media traffic generated in a
  • FIGURE 3 is an exemplary view showing an amount of media traffic generated a
  • FIGURE 4 is an exemplary view showing an amount of decrease in the media traffic generated when the method of determining a PT server having a controlling function is applied to the PT system according to the present invention
  • FIGURE 5 is a graph showing an example of a decrease rate of total media traffic generated according to the present invention.
  • FIGURE 6 is an example of a signal flow chart showing a method and system for determining a PT server having a controlling function according to an embodiment of the present invention.
  • FIGURE 7 is an example of a signal flow chart showing a method and system for determining a PT server having a controlling function according to another embodiment of the present invention.
  • Mode for Invention
  • a method and system for determining a server having a controlling function e.g., a Controlling PoC Function
  • a controlling function e.g., a Controlling PoC Function
  • the use of the term "PT" is intended to cover any PT type services including, but not limited to, a PTT service (voice), a PTV service (video), a PTD service (data), etc.
  • a PTT service voice
  • a PTV service video
  • PTD service data
  • only one server may have the controlling function; however, the present invention is applicable to other situations or variations thereof.
  • a PT server included in a PT server region having the most session-established PT clients is determined to be the PT server having the controlling function. That is, a PT server of a PT server region having the highest number of PT clients invited to a session among the different PT servers serving all the PT clients invited to the session, regardless of the type/kind of the session, is designated as the PT server having the controlling function (i.e., as the PT server designated to perform the controlling function).
  • the session can be, but not limited to, an ad-hoc session, a chat-group session, a one-to-one session, a prearranged group session, etc.
  • the terms like 'session- established' PT clients, 'session-participating' PT clients, 'session-invited' PT clients, and 'invited' PT clients are interchangeably used since in most cases, the number of each such clients would be the same. However, if they differ, the number of any one of such clients (e.g., session-invited or session-established) can be used as a basis to make the determination which PT server should have the controlling function.
  • the designation of the PT server having the controlling function can be changed to designate a different PT server as the PT server having the controlling function, even during a session-establishment process or when the number of PT clients participated in the session is varied.
  • the present method of determining which PT server should have the controlling function and designating that PT server as the controlling PT server can be applied as needed, continuously, or at certain intervals, etc.
  • the controlling function may be performed by different PT servers as one of the different PT servers is designated as the controlling PT server at a given time.
  • a PT server of a PT server region to which a PT client initiating the session belongs makes the determination of which PT server should have the controlling function.
  • a PT server including a group identity makes the determination of which PT server should have the controlling function.
  • a PT server that requests and receives the address list of the PT client corresponding to the group identity to and from the database can make the determination of which PT server should have the controlling function.
  • a PT server of a PT server region to which a PT client belongs can be defined as a PT server included in the home network of the PT client, or a PT server that provides a participating PT function to the PT client, or a PT server to which the PT client first accesses in case that a plurality of PT servers are used in one PT session.
  • FIGURE 2 is an exemplary view of a PT system showing a distribution of media traffic generated in a session in case that PT clients included in different PT server regions are session-established, according to the present invention.
  • PT clients included in different PT server regions are session-established, according to the present invention.
  • first PT client when a specific PT client (first PT client) included in the first PT server region initiates a session and a first PT server 100 included in the first PT server region has a controlling function, sets of media traffic (X) corresponding to the number of PT clients (m+n) participated (invited) in the session are generated between the first PT server 100 and a bearer packet network 170. Also, between a second PT server 200 included in the second PT server region and a bearer packet network 270, sets of media traffic (Y) corresponding to two times of the number of invited PT clients (n) included in the second PT server region among the PT clients invited in the session are generated. Also, between the first PT server region and the second PT server region, sets of media traffic (Z) corresponding to the number of invited PT clients (n) of the PT server region to which the PT server having the controlling function (100) does not belong are generated.
  • 'TT' represents the total amount of media traffic (sets of media traffic) generated in the different networks
  • 'TC represents the total number of PT clients participated (invited) in a session
  • 'NC represents the number of invited PT clients of a PT server region to which a PT server having a controlling function does not belong.
  • TC m+n
  • NC n.
  • FIGURE 3 is an exemplary view of a PT system showing the amount of media traffic generated when the method of determining a PT server having a controlling function according to the present invention is applied to the example of FIGURE 1. All the components of the PT system of FIGURE 3 are operatively coupled.
  • the system e.g., one of the PT servers in the system
  • the system is configured to check the number of session-established PT clients being served by each PT server in a session, and to select the PT server that has the most number of the session-established PT clients among the different PT servers as the PT server having the controlling function. Then the selected PT server performs the controlling function for that session or a part thereof.
  • HGURE 3 In the example of HGURE 3, three PT clients 110, 120, 130 in a first PT server region and six PT clients 210, 220, 230, 240, 250, 260 in a second PT server region have established a session with each other.
  • the system selects or designates the second PT server 200 in the second PT server region as the PT server having the controlling function, because the second PT server 200 serves 6 session- established PT clients which is larger than 3 session-established PT clients served by the first PT server 100 in the first PT server region.
  • the second PT server 200 serving the second PT server region having the most number of PT clients participated in the session is determined to be the PT server having the controlling function, and performs the controlling function during the session or a part thereof.
  • FIGURE 3 The amount of media traffic (number of sets of media traffic) generated during the session when the second PT server 200 performs the controlling function is illustrated in FIGURE 3 with reference numerals 180-188.
  • reference numeral 188 indicates there are six sets of media traffic generated and transmitted from the second PT server 200 to the bearer packet network 270.
  • the second PT server 200 then generates 8 sets of media traffic (184 and 188) in order to transmit the voice (from the first PT client 110) to six invited PT clients 210, 220, 230, 240, 250, and 260 of the second PT server region and to two invited PT clients 120 and 130 of the first PT server region. That is, the second PT server 200, by performing the controlling function, transmits the voice from the first PT client 110 to all other session-established (invited) PT clients 120, 130, 210, 220, 230, 240, 250, and 260.
  • the 2 sets of media traffic (184) from the second PT server 200 are transmitted to the first PT server 100 through the bearer packet networks 270 and 170 (185, 186).
  • the first PT server 100 by performing the participating functions, transmits the received 2 sets of media (187) respectively to the second and third PT clients 120 and 130 through the bearer packet network 170.
  • the 6 sets of media traffic (188) from the second PT server 200 are transmitted respectively to the first through sixth PT clients 210-260 through the bearer packet network 270.
  • FIGURE 4 is an exemplary view of a PT system showing a reduced amount of media traffic when the method of determining a PT server having a controlling function is applied to the PT system according to the present invention.
  • the second PT server 200 serving the second PT server region is determined as the PT server having the controlling function. Then the traffic between the first PT server 100 and the bearer packet network 170 of the first PT server region, between the bearer packet network 170 of the first PT server region and the bearer packet network 270 of the second PT server region, and between the second PT server 200 and the bearer packet network 270 of the second PT server region can be respectively decreased by as much as a difference D between the number of clients included in the regions according to Formula 2 below:
  • 'D' denotes a difference between the number of invited PT clients included in a PT server region having more invited PT clients and the number of invited PT clients included in a PT server region having less invited PT clients.
  • Formula 3 shows a decrease rate of media traffic generated when the method of determining a PT server having a controlling function according to the present invention is used:
  • 'B' denotes the number of invited (participating) PT clients included in a PT server region having more (or most) PT clients participated in the session
  • FIGURE 5 is a graph showing the total decrease rate of media traffic generated in case that the number of invited PT clients of the PT server region having less invited PT clients (A) is 3 and the number of invited PT clients of the PT server region having more (or most) invited PT clients (B) is varied from 0 to 20.
  • the decrease amount of media traffic is 0%.
  • A is 3 and B is 7, the decrease rate of media traffic generated in that case is approximately 38.7%. That is, by using the present method of determining which PT server should perform the controlling function, the amount of media traffic that needs to be generated to provide the PT service is reduced by approximately 38.7%, which is a significant reduction in the media traffic generated.
  • the traffic decrease effect/advantage of the present invention is equally generated among at least three PT server regions, is equally generated during a PT session-establishment using a session initiation protocol (SIP) or a broadcasting function using the SIP message, and is equally generated in a talk burst control signaling using a real time control protocol (RTCP).
  • SIP session initiation protocol
  • RTCP real time control protocol
  • FIGURE 6 is a signal flow chart showing a method of determining a PT server having a controlling function in case of an ad-hoc PT group session according to an embodiment of the present invention. This method is implemented in the PT system of FIGURE 3, but is equally applicable to other PT systems.
  • a PT server of a PT server region to which a PT client initiating the session belongs always had the controlling function.
  • the first PT client 110 of the first PT server region generates an invite message (INVITE) in order to invite, e.g., the second PT client 220, the third PT client 230, and the fourth PT client 240 included in the second PT server region to a group session, and transmits the INVITE message to the first PT server 100 of the first PT server region (Sl 1).
  • INVITE invite message
  • the INVITE message transmitted by the first PT client 110 comprises a PT address list of all the invited PT clients 220, 230, and 240, media parameter(s) of the first PT client 110, a PT service indication, a PT address of the first PT client 110, and a talk burst control protocol proposal.
  • the INVITE message optionally comprises a passive response resulting in an invalid request.
  • the first PT server 100 that has first received the INVITE message certifies a uniform resource identifier (URI) of the invited PT clients through the PT address list of the invited PT clients, and then respectively calculates the number of session-invited PT clients included in the first PT server region and the number of session-invited PT clients included in the second PT server region, and determines which PT server should have the controlling function based on the calculated information (S 13).
  • URI uniform resource identifier
  • S 13 calculated information
  • the address is a SIP URI
  • a domain name and another method can be used to divide the network.
  • the first PT server 100 that has certified the number of session-invited
  • PT clients in the first PT server region and the number of session-invited PT clients in the second PT server region determines whether itself (the first PT server 100) should be the PT server having the controlling function or the second PT server 200 should be the PT server having the controlling function (S 13) based on the number of session- invited PT clients in each of the PT server regions.
  • a PT server of a PT server region having more (or most) PT clients participated in a session is determined as the PT server having the controlling function.
  • the first PT server 100 determines that the second PT server 200 should have the controlling function.
  • the first PT server 100 that has determined the second PT server 200 as the PT server having the controlling function then transmits an INVITE message to the second PT server 200 (S 15), e.g., through the bearer networks, etc.
  • This INVITE message includes a parameter informing/indicating that the second PT server 200 has the controlling function and the address list of all the PT clients 220, 230, and 240 invited to the session.
  • the second PT server 200 then respectively transmits an INVITE message to the second PT client 220, the third PT client 230, and the fourth PT client 240 invited to the session, whereby an ad-hoc PT group session begins (S17).
  • each INVITE message includes a destination address, i.e., the address of the corresponding PT client to which that INVITE message is directed.
  • the parameters included in the INVITE message transmitted to the second PT server 200 by the first PT server 100 are varied according to whether the first PT server 100 is the PT server having the controlling function or the second PT server 200 is the PT server having the controlling function.
  • the two scenarios are discussed as follows and in both scenarios, it is assumed that the first PT client 110 in the first PT server region initiated the session as in step SIl.
  • the first PT server 100 recognizes itself to be the PT server having the controlling function (i.e., the first PT server 100 determines that the first PT server 100 itself will perform the controlling function). Then the first PT server 100 transmits an INVITE message to the second PT server 200 of the second PT server region.
  • the INVITE message transmitted to the second PT server 200 by the first PT server 100 includes PT address(es) of session-invited PT client(s), media parameters of the first PT server 100, a PT service indication, a PT address of the first PT client 110, a controlling PT function indication parameter, a talk burst control protocol proposal, and a passive response resulting in an invalid request when the first PT client 110 is selected.
  • the first PT server 100 can generate a plurality of INVITE messages (may be couched in one INVITE message) to be respectively sent to the session-invited PT clients, where each INVITE message includes, among the above listed, the PT address of the corresponding PT client, and not the entire list of all the addresses of all the invited PT clients.
  • the first PT server 100 can add, to the INVITE message received from the first PT client 110, the controlling PT function indication parameter and then transmit it to the second PT server 200 as its INVITE message.
  • the controlling PT function indication parameter indicates which PT server has the controlling function, and includes an address of the PT server having the controlling function.
  • the controlling PT function indication parameter includes an address of the first PT server 100, which is determined to perform the controlling function.
  • the first PT server 100 recognizes that itself is not the PT server having the controlling function but the second PT server 200 is the PT server having the controlling function. Then the first PT server 100 transmits an INVITE message to the second PT server 200 of the second PT server region.
  • the INVITE message transmitted to the second PT server 200 by the first PT server 100 include an address list of session-invited PT clients, a PT service indication, an address of the first PT client 110 (that generated the media), a controlling PT function indication parameter, a talk burst control protocol proposal, and a passive response resulting in an invalid request when the first PT client 110 is selected.
  • the controlling PT function indication parameter includes an address of the second PT server 200, that is, a value informing that the second PT server 200 is the PT server having the controlling function.
  • the first PT server 100 which receives the list of addresses of the session-invited clients from the first PT client 110 initiating the session, is determined to be the PT server having the controlling function according to the method of the present invention, the first PT server 100 can transmit an INVITE message to each of all the PT clients to be invited to the session (e.g., some through the second PT server 200).
  • each of the INVITE messages sent from the first PT server 100 includes the address of the corresponding PT client to be invited and not the entire list of client addresses.
  • the second PT server 200 has to first get the addresses of the invited PT clients in order to transmit the INVITE message to them. Accordingly, in that case, the INVITE message transmitted from the first PT server 100 to the second PT server 200 includes a list of addresses of all the PT clients to be invited to the session, and not just the address of one (corresponding) invited PT client.
  • FIGURE 7 is a signal flow chart showing a method of determining a PT server having a controlling function in case of a chat-group session or a pre-arranged group session according to another embodiment of the present invention. This method is implemented in the PT system of FIGURE 3, but is equally applicable to other PT systems.
  • a PT server including a group identity always had the controlling function.
  • a PT server of a PT server region having more (or most) PT clients invited to the session is determined to have the controlling function.
  • An address list of the PT clients included in the group identity of the session may exist not only in a PT server but also outside the PT server, e.g., in a separate database.
  • an address list exists outside the PT server (e.g., in an additional database)
  • one or each of the session-established PT servers can request an address list of PT client(s) belonging to the group identified in the group identity (e.g., the name of the group) from the database, thereby to serve possibly as the PT server having the controlling function.
  • a list of addresses of PT client(s) belonging to a chat- group or pre-arranged group is stored in a database 300.
  • the database 300 in this example is an external database associated with the second PT server 200, but can be an internal database or an external database.
  • this list can be stored in association with a group identify (e.g., the name of the chat-group or the prearranged group, etc.) so that it can retrieved by using the group identify.
  • the database 300 may store a plurality of different lists of addresses for different chat-groups and different pre-arranged groups.
  • a current chat-group session comprises the first PT client 110, the third client 130, the fourth client 140 of the first PT server region, and the second PT client 220 of the second PT server region.
  • the second PT server 200 of the second PT server region requests an address list of all the PT client(s) corresponding to the group identity for the current chat-group session from the database 300.
  • the first PT client 110 of the first PT server region transmits an INVITE message to the first PT server 100 to initiate a particular chat-group session. Then in order to request client address(es) for the requested chat- group session, the first PT server 100 transmits the INVITE message to the second PT server 200 (S21).
  • the INVITE message transmitted to the first PT server 100 by the first PT client 110 includes a group identity for the chat-group session that the first PT client 110 is interested in, an address of the PT client 110 initiating the session, a PT service indication, media parameters of the first PT client 110, and a talk burst control protocol proposal.
  • the first PT server 100 transmits an INVITE message to the second PT server
  • the INVITE message transmitted to the second PT server 200 by the first PT server 100 includes the group identity (e.g., chat group name, etc.) for the requested chat-group session, the address of the PT client 110 initiating the session, a PT service indication, media parameters of the first PT server 100, and a talk burst control protocol proposal.
  • group identity e.g., chat group name, etc.
  • the second PT server 200 that has received the INVITE message then requests and receives the address list of the PT client(s) corresponding to the identified group identity from the database 300, e.g., through an XML configuration access protocol (XCAP), an extension protocol in HTTP, thereby to certify URIs of PT clients to be invited to the chat-group session (S23, S25). Then, by examining the address list information, the second PT server 200 determines which PT server, among the different PT servers associated with the current chat-group session, has the most clients to be invited to the requested chat-group session and designates that PT server to have the controlling function according to the present invention (S27).
  • XCAP XML configuration access protocol
  • the second PT server 200 respectively calculates the number of the PT clients (belonging to the identified chat group) in the second PT server region and the number of the PT clients (belonging to the identified chat group) in the first PT server region by using each address or each identifier of the PT clients in the list or by using a specific value for dividing home PT servers of the clients (S27).
  • one PT client (220) is involved in the second PT server region, whereas three PT clients (110, 130, 140) are involved in the second PT server region for the requested chat group session.
  • the address or the identifier of the PT clients is a TEL uniform resource identifier (URI)
  • URI uniform resource identifier
  • local numbers allocated to each provider or each region can be used to divide the home PT servers of the clients.
  • SIP URI uniform resource identifier
  • a domain name can be used.
  • a different for dividing the home PT servers of the clients can also be used.
  • the second PT server 200 that has certified the number of the invited PT clients in each PT server region determines whether itself is to be the PT server having the controlling function or the first PT server 100 of the first PT server region is to be the PT server having the controlling function. In the example of FIGURE 7, since the number of the invited PT clients included in the first PT server region is larger than that in the second PT server region, the second PT server 200 determines that the first PT server 100 should have the controlling function.
  • the second PT server 200 that has determined the first PT server 100 as the PT server having the controlling function then transmits an INVITE message including a parameter indicating that the first PT server 100 has the controlling function and an address list of all the PT clients 130, 140, and 220 invited to the session, to the first PT server 100 (S29).
  • the first PT server 100 designated to perform the controlling function, respectively transmits the INVITE message to the third PT client 120 and the fourth PT client 130 invited to the session, and to the second PT client 210 through the second PT server 200 (S31, S33).
  • step S29 a situation where the first PT server 100 has been determined to perform the controlling function has been discussed above.
  • the parameters included in the INVITE message transmitted to the first PT server 100 by the second PT server 200 are varied according to whether the second PT server 200 is determined to be the PT server having the controlling function or the first PT server 100 is determined to be the PT server having the controlling function.
  • the two scenarios are discussed below as follows.
  • the second PT server 200 respectively transmits the INVITE message to the PT clients 130, 140, and 220 invited to the session, e.g., some through the first PT server 100.
  • the INVITE message transmitted by the second PT server 200 to the first PT server 100 includes addresses of invited PT clients (130, 140), an address of the PT client 110 initiating the session, a PT service indication, media parameters of the second PT server 200, and a talk burst control protocol proposal. Since the second PT server 200 having the group identity is determined to be the PT server having the controlling function, the second PT server 200 need not inform its address.
  • the second PT server 200 transmits an INVITE message including a parameter informing that the first PT server 100 has the controlling function and addresses of the PT clients 130, 140, and 220 invited to the session. That is, this INVITE message comprises an address list of all the invited PT clients 130, 140, and 220, an address of the PT client 110 initiating the session, a PT service indication, a talk burst control protocol proposal, and a controlling function informing parameter.
  • the controlling function informing parameter can be a value indicating that the first PT server 100 has the controlling function, e.g., an address of the first PT server 100.
  • the second PT server 200 may transmit to the first PT server 100 not the address list of the invited PT clients, but the group identity and parameter(s) for instructing the first PT server 100 to directly request from the additional database the address list of the PT clients corresponding to the group identity.
  • the determining PT server includes its policies in a body of the INVITE message and transmits it to the PT server having the controlling function.
  • a policy of a PT server having no controlling function can be changed during the session, and the PT server having no controlling function can transmit the changed policy to the PT server having the controlling function.
  • the PT server having the controlling function periodically transmits a subscribe message to the PT server having no controlling function, and the PT server having no controlling function informs the changed policy to the PT server having the controlling function through a notify message for the subscribe message.
  • the policy information can include a session establishment policy for establishing a session, and a session joining policy applied when clients participate in the session.
  • the PT server having the controlling function allows clients that the session initiator invited, to participate in the session, and allows clients that were invited by themselves or another participant, to participate in the session. Also, in case of a pre-arranged group session, the PT server having the controlling function allows members of the group to participate in the session.
  • the policy information can include the following policies besides the session joining policy.
  • a group participant may leave the PT group session.
  • the PT group session initiator leaves the PT group session, whether the PT group session should be ended or not would depend on the group policy.
  • any PT participant may add any other PT user to any ongoing PT session, as long as the maximum number of participants is not exceeded and if allowed by the PT group policy.
  • the PT server may decline the request to participate in the session based on policy information disallowing the requesting user to subscribe the participant information.
  • PT server having the controlling function may support a policy of notifying a PT client when it is next in line for the permission to send a talk burst, e.g. in order to allow the PT client the opportunity to acquire radio resources in advance of being granted the permission to send a talk burst
  • an allowed time limit to speak can be limited according to the policy information.
  • the PT server having the existing controlling function transmits the policy information to a PT server having a new controlling function, thereby controlling PT clients included in different PT server regions according to each policy information.
  • a PT server of a PT server region having the most PT clients participated/invited in/to a session is designated as a PT server having a controlling function
  • the amount of media traffic generated in the session-established network can be decreased significantly.
  • the PT server having the controlling function may not be changed according to the number of the PT clients included in the PT server region.
  • the policy for changing the PT server having a controlling function may be determined or changed by a service provider.
  • the role of the PT server having the controlling function can be transferred to another PT server during the session or before the session is finished, thereby establishing a method of dynamically determining a PT server having a controlling function.
  • the PT system e.g., the determining PT server
  • the PT system can be configured to check the number of PT clients involved in each of the different PT server regions and to determine, based on the checked numbers, if a new/different PT server should perform the controlling function.
  • the PT system can transfer all and any information/data necessary to perform the controlling function as needed, from the existing PT server previously designated to perform the controlling function to the different PT server newly designated to perform the controlling function.
  • This process of checking the numbers of PT clients and designating one PT server to have the controlling function can be repeated at certain intervals or continuously or as many as needed during a session.
  • the PT server previously designated to perform the controlling function can include all the information necessary to perform the controlling function in the body of the SIP message, and then transmit this information to the new PT server newly designated to perform the controlling function.
  • This information can include a list of PT clients invited/participated in the session, a policy for controlling the session, etc.
  • the PT server regions are limited to two. However, it is equally possible to implement the present invention in PT server regions that are three or more. Only as on example of implementation, if there are 4 PT server regions available, then the steps applied to between two PT server regions discussed above can be applied to one or more different combinations of any two PT server regions among the 4 PT server regions. In the alternative, all the PT servers regions may be evaluated at one time to determine which PT server in the regions is serving a highest number of invited PT clients for the session. Also, the present invention can be applied when the PT clients are session-established through at least two PT servers on one network.
  • a PT server of a PT server region having the most or more PT client among multiple PT servers associated with at least one session is determined as a PT server having a controlling function. Therefore, the amount of media traffic generated between the session-established PT clients can be decreased greatly.
  • a PT server having a controlling function can be changed dynamically to a different PT server even during the session, and a service quality can be enhanced by decreasing the amount of media traffic.
  • the calculating, determining, designating, and other processing steps of the present method of determining a server having a controlling server can be implemented with computer software written in existing computer programming language.
  • Such computer program(s) may be stored in memories such as hard drive, RAM, ROM, PROM, etc. associated with computer(s) such as the PT server(s) discussed above, e.g., the PT server 100 (or a processor thereof) making the determination of which PT server should have the controlling function.
  • such computer program(s) may be stored in a removable or portable storage medium such as a magnetic disc, optical disc, magneto-optical disc, etc.
  • Such computer program(s) may also take the form of a signal propagating across the Internet, extranet, intranet or other network and arriving at the destination device for storage and implementation.
  • the computer programs are readable and executable using a computer, a server, a processor in a server or a computer-based device.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Business, Economics & Management (AREA)
  • General Business, Economics & Management (AREA)
  • Computer Hardware Design (AREA)
  • General Engineering & Computer Science (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Computer And Data Communications (AREA)

Abstract

L'invention concerne un procédé et un système d'identification d'un serveur à fonction de commande. Ce procédé consiste à identifier le serveur qui fournit un service à la plupart des client invités à une session sur au moins deux serveurs différents fournissant des services à au moins deux clients, et à désigner le serveur identifié comme serveur à fonction de commande.
PCT/KR2005/003308 2004-10-22 2005-10-06 Procede et systeme d'identification de serveur a fonction de commande WO2006083070A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
BRPI0517292-6A BRPI0517292A (pt) 2004-10-22 2005-10-06 método e sistema para determinar servidor que tem função de controle
CA002584180A CA2584180A1 (fr) 2004-10-22 2005-10-06 Procede et systeme d'identification de serveur a fonction de commande
EP05856461A EP1805655A1 (fr) 2004-10-22 2005-10-06 Procede et systeme d'identification de serveur a fonction de commande
JP2007537793A JP2008517396A (ja) 2004-10-22 2005-10-06 制御機能を有するサーバ決定方法及びシステム

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US62158904P 2004-10-22 2004-10-22
US60/621,589 2004-10-22
KR10-2005-0005155 2005-01-19
KR1020050005155A KR100690871B1 (ko) 2004-10-22 2005-01-19 제어기능을 갖는 서버 결정방법

Publications (1)

Publication Number Publication Date
WO2006083070A1 true WO2006083070A1 (fr) 2006-08-10

Family

ID=36777422

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2005/003308 WO2006083070A1 (fr) 2004-10-22 2005-10-06 Procede et systeme d'identification de serveur a fonction de commande

Country Status (4)

Country Link
EP (1) EP1805655A1 (fr)
JP (1) JP2008517396A (fr)
CA (1) CA2584180A1 (fr)
WO (1) WO2006083070A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006114059A1 (fr) 2005-04-27 2006-11-02 Huawei Technologies Co., Ltd. Procédé et système de détermination du serveur de contrôle central
EP1952654A1 (fr) * 2005-11-14 2008-08-06 LG Electronics Inc. Procede et dispositif de definition d'un serveur pt a fonction de commande
JP4808810B2 (ja) * 2006-10-18 2011-11-02 エルジー エレクトロニクス インコーポレイティド Ｐｔサービスにおける発言権制御方法及び装置
WO2014186284A1 (fr) * 2013-05-14 2014-11-20 Qualcomm Incorporated Sélection d'un serveur d'application d'enregistrement d'un ou de plusieurs équipements d'utilisateur pour une session de sous-systèmes multimédia de protocole internet (ims)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2881502T3 (es) * 2015-06-29 2021-11-29 Huawei Tech Co Ltd Método, aparato y sistema para control de palabra en múltiples sistemas de MCPTT
CN107733631A (zh) * 2017-10-31 2018-02-23 深圳市惟新科技股份有限公司 全双工终端的话权控制方法及装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002037292A1 (fr) * 2000-11-02 2002-05-10 Sony Computer Entertainment Inc. Systeme recreatif avec gestion de la distribution de contenu
WO2002062054A2 (fr) * 2000-10-26 2002-08-08 General Instrument Corporation Periode de visionnement pour une autorisation extensible d'un contenu multimedia en continu
KR20030000932A (ko) * 2001-06-27 2003-01-06 주식회사 넥스터 정보기술 분산 데이터베이스의 소망 컨텐츠를 특정 컴퓨터의영상출력장치에 표시하기 위한 방법 및 시스템
KR20030030050A (ko) * 2001-10-06 2003-04-18 주식회사 비즈모델라인 네트워크를 통해 원격 적재되는 애플리케이션 서비스 방법및 시스템

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11232201A (ja) * 1998-02-12 1999-08-27 Nippon Telegr & Teleph Corp <Ntt> 通信資源制御装置
US6564261B1 (en) * 1999-05-10 2003-05-13 Telefonaktiebolaget Lm Ericsson (Publ) Distributed system to intelligently establish sessions between anonymous users over various networks
JP2001274911A (ja) * 2000-03-24 2001-10-05 Toshiba Corp 交換機ネットワークシステムおよび構内交換機

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002062054A2 (fr) * 2000-10-26 2002-08-08 General Instrument Corporation Periode de visionnement pour une autorisation extensible d'un contenu multimedia en continu
WO2002037292A1 (fr) * 2000-11-02 2002-05-10 Sony Computer Entertainment Inc. Systeme recreatif avec gestion de la distribution de contenu
KR20030000932A (ko) * 2001-06-27 2003-01-06 주식회사 넥스터 정보기술 분산 데이터베이스의 소망 컨텐츠를 특정 컴퓨터의영상출력장치에 표시하기 위한 방법 및 시스템
KR20030030050A (ko) * 2001-10-06 2003-04-18 주식회사 비즈모델라인 네트워크를 통해 원격 적재되는 애플리케이션 서비스 방법및 시스템

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006114059A1 (fr) 2005-04-27 2006-11-02 Huawei Technologies Co., Ltd. Procédé et système de détermination du serveur de contrôle central
EP1868341A1 (fr) * 2005-04-27 2007-12-19 Huawei Technologies Co., Ltd. Procédé et système de détermination du serveur de contrôle central
EP1868341A4 (fr) * 2005-04-27 2008-05-14 Huawei Tech Co Ltd Procédé et système de détermination du serveur de contrôle central
EP1952654A1 (fr) * 2005-11-14 2008-08-06 LG Electronics Inc. Procede et dispositif de definition d'un serveur pt a fonction de commande
EP1952654A4 (fr) * 2005-11-14 2014-11-19 Lg Electronics Inc Procede et dispositif de definition d'un serveur pt a fonction de commande
JP4808810B2 (ja) * 2006-10-18 2011-11-02 エルジー エレクトロニクス インコーポレイティド Ｐｔサービスにおける発言権制御方法及び装置
US8416708B2 (en) 2006-10-18 2013-04-09 Lg Electronics Inc. Method and device for controlling floor in push to service
WO2014186284A1 (fr) * 2013-05-14 2014-11-20 Qualcomm Incorporated Sélection d'un serveur d'application d'enregistrement d'un ou de plusieurs équipements d'utilisateur pour une session de sous-systèmes multimédia de protocole internet (ims)

Also Published As

Publication number Publication date
JP2008517396A (ja) 2008-05-22
EP1805655A1 (fr) 2007-07-11
CA2584180A1 (fr) 2006-08-10

Similar Documents

Publication Publication Date Title
US20060089998A1 (en) Method and system for determining server having controlling function
US9264467B2 (en) Method, user equipment, and system for opening an ad-hoc PoC session in a PoC system
KR101251193B1 (ko) ＰｏＣ 시스템에서 그룹 세션을 개설하기 위한 방법 및 시스템
KR101174525B1 (ko) 푸쉬투토크 오버 셀룰러 네트워크의 응답 클라이언트 식별방법 및 그 시스템
US8023979B2 (en) Method and system for splitting terminals in push-to-talk over cellular network
US7693533B2 (en) Method and system for merging multiple push-to-talk over cellular sessions
KR101061373B1 (ko) 푸쉬투토크 오버 셀룰러 망의 미디어 저장 서비스 수행 방법과 ＰｏＣ 서버 및 ＰｏＣ 클라이언트
US8180387B2 (en) Method, terminal, and system for establishing PoC group session in PoC system
KR101058643B1 (ko) 푸쉬 투 토크 오버 셀룰러 시스템의 그룹 세션 개시 방법및 그 시스템
EP2070367B1 (fr) Système d&#39;établissement et de gestion de session poc multimédia pour la fourniture de service d&#39;appel multimédia, et procédé et matériel employé par l&#39;utilisateur associé
KR100666984B1 (ko) 푸쉬 투 토크 오버 셀룰러 시스템 사용자의 응답 모드에따른 호 처리 시스템 및 방법
US20070218932A1 (en) Method, user equipment and system for providing simultaneous PoC multimedia services session by session
KR20070108311A (ko) ＰｏＣ 시스템에서의 멀티 미디어 통화 서비스를 수행하기위한 발언권 관리 시스템과 그 방법 및 단말장치
EP1813082A1 (fr) Procede et systeme pour le traitement d&#39;appel de messagerie vocale instantanee base sur le mode reponse de systeme cellulaire de messagerie vocale instantanee
KR20060093976A (ko) 푸쉬 투 토크 오버 셀룰러 네트워크의 발언권 부여 방법 및그 시스템
KR20060067053A (ko) 푸쉬투토크 오버 셀룰러 사용자 발언 시간 사용 방법 및그 시스템
WO2006083070A1 (fr) Procede et systeme d&#39;identification de serveur a fonction de commande
US7966031B2 (en) Method and system for dividing single PoC group session
CA2628052C (fr) Procede et dispositif de definition d&#39;un serveur pt a fonction de commande
KR101290969B1 (ko) 미디어 타입별 서로 다른 응답 모드를 가진 ＰｏＣ 세션개시 방법 및 시스템
KR20090059898A (ko) ＰｏＣ 세션 개설 시 미디어 전송 권리 양도 방법 및 이를위한 시스템과 ＰｏＣ 단말

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application
WWE Wipo information: entry into national phase

Ref document number: 2584180

Country of ref document: CA

Ref document number: 1309/KOLNP/2007

Country of ref document: IN

WWE Wipo information: entry into national phase

Ref document number: 2007537793

Country of ref document: JP

WWE Wipo information: entry into national phase

Ref document number: 200580036316.5

Country of ref document: CN

NENP Non-entry into the national phase

Ref country code: DE

WWE Wipo information: entry into national phase

Ref document number: 2005856461

Country of ref document: EP

WWE Wipo information: entry into national phase

Ref document number: 2007114179

Country of ref document: RU

WWP Wipo information: published in national office

Ref document number: 2005856461

Country of ref document: EP

ENP Entry into the national phase

Ref document number: PI0517292

Country of ref document: BR