WO2008003251A1 - Procédé, système et dispositif d'établissement d'une session de groupe - Google Patents

Procédé, système et dispositif d'établissement d'une session de groupe Download PDF

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Publication number
WO2008003251A1
WO2008003251A1 PCT/CN2007/070170 CN2007070170W WO2008003251A1 WO 2008003251 A1 WO2008003251 A1 WO 2008003251A1 CN 2007070170 W CN2007070170 W CN 2007070170W WO 2008003251 A1 WO2008003251 A1 WO 2008003251A1
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WO
WIPO (PCT)
Prior art keywords
group
session
condition
establishing
group member
Prior art date
Application number
PCT/CN2007/070170
Other languages
English (en)
French (fr)
Inventor
Xuefei Song
Qian Sun
Chenghui Peng
Yang Zhao
Hongqing Bao
Linyi Tian
Original Assignee
Huawei Technologies Co., Ltd.
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 Huawei Technologies Co., Ltd. filed Critical Huawei Technologies Co., Ltd.
Priority to EP07721786A priority Critical patent/EP2009846A4/en
Priority to CA002652827A priority patent/CA2652827A1/en
Publication of WO2008003251A1 publication Critical patent/WO2008003251A1/zh
Priority to US12/273,902 priority patent/US20090094367A1/en

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Classifications

    • 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
    • H04L67/1097—Protocols in which an application is distributed across nodes in the network for distributed storage of data in networks, e.g. transport arrangements for network file system [NFS], storage area networks [SAN] or network attached storage [NAS]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/02—Details
    • H04L12/16—Arrangements for providing special services to substations
    • H04L12/18—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast
    • H04L12/1813—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast for computer conferences, e.g. chat rooms
    • H04L12/1818—Conference organisation arrangements, e.g. handling schedules, setting up parameters needed by nodes to attend a conference, booking network resources, notifying involved parties
    • 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
    • H04L67/14—Session management
    • 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
    • H04L67/2866—Architectures; Arrangements
    • H04L67/30—Profiles
    • 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
    • H04W4/08—User group management

Definitions

  • the present invention relates to communication technologies, and in particular, to a method, system and device for establishing a group session.
  • ⁇ Instant messaging
  • PoC Push to Talk over Cellular
  • FIG. 1 a system for implementing a static group is shown in FIG. 1 , where: the service server 11 provides an application layer network function for the service, and can perform a control function and a participation function. Both the PoC service server and the IM service server are typical examples of implementing the above-mentioned service server functions.
  • the storage device 12 is a device for storing files and data related to a service, the file and data may be common information shared by a plurality of services, and the storage device 12 also has a function of managing service files and data, and the commonly used storage device includes a database, XML (Extensible Markup Language) document management server.
  • the client 13 includes two modules, a storage device client 131 and a service client 132.
  • the storage device client 131 is a client that manages files and data stored in the network, and has functions of creating or replacing a file and data, deleting a file and data, and acquiring a file and data.
  • the service client 132 has the functions of supporting services. For example, when the service server is a PoC server or an IM server, the service client should support session initiation, participation, and termination, and support functions such as receiving and sending operations for instant message notification.
  • the current static group information is stored in the storage device 12.
  • the group information file only contains the group member list, that is, the group member identifier set.
  • the group member list When implemented in the form of XML, the group member list has the following form:
  • ⁇ list-service> where ⁇ list-service> element is the root element of the group information file, indicating that this file describes a group, and uses the uri attribute to indicate the identity of the group; ⁇ display-name> element indicates the group
  • the ⁇ list> element represents a list of group members, and the ⁇ list> element contains one or more ⁇ 611 ⁇ > child elements, each ⁇ entry> 3 ⁇ 4 prime represents a group member, and each ⁇ entry> element has A uri attribute that identifies a group member.
  • the service server 11 When the service server 11 receives the group request initiated by the group member, the service server 11 first obtains the group member list from the storage device 12, and then initiates a group session to all members in the group according to the group member list. Request, when a group member answers this request, the group tongue is successfully established.
  • FIG. 2 The specific process of creating a group and establishing a group session in the prior art is as shown in FIG. 2:
  • Step 201 The group creator creates a group member list through the storage device client, and stores it on the corresponding storage device.
  • Step 202 If the storage is successful, the storage device returns an ok response, otherwise the failure response is returned.
  • Step 203 The authorized user in the group creator or the group initiates a group session request to the service server by using the service client, where the request includes the group.
  • Step 204 The service server sends a request for obtaining a group member list to the storage device, such as a group identifier.
  • Step 205 After obtaining the success, the storage device returns an ok response to the service server, and sends the group member list requested by the service server to the service server.
  • Step 206 The service server parses the obtained group member list.
  • Step 207 The service server sends a group session request to all group members in the group member list according to the parsing result.
  • Step 208 The group creator agrees to participate in the group session and returns an ok response to the service server.
  • Step 209 After receiving the success response of the group creator, the service server sends a successful response to the group session initiator (group member 1).
  • Step 210 Successfully establish a group session.
  • Step 211 Some group members (group member 2) are unable to participate in the group for some reason (for example, the user terminal is closed), and therefore the tongue request is rejected.
  • the groups used in the IM and PoC communication systems are all static groups, that is, the creator must establish an explicit group member list before establishing the group session, and the service server is based on the service server when establishing the group session.
  • the member ID in the group member list initiates a group session request to all members in the group. For members who cannot currently establish a group, the communication resources are undoubtedly wasted.
  • An embodiment of the present invention provides a method for establishing a group session, so as to select a member who satisfies the condition to establish a group tongue, thereby saving communication resources.
  • Another aspect of the embodiments of the present invention further provides a system for establishing a group session to select a member that meets the condition to establish a group session, thereby saving communication resources.
  • a service server is further provided to select a member who meets the condition to establish a group tongue, thereby saving communication resources.
  • the embodiment of the invention discloses a method for establishing a group session, and the method includes
  • a group session request is initiated to the group members whose various information meets the establishment of the session condition, and a group session is established.
  • an embodiment of the present invention further discloses a system for establishing a group session, where the system includes a storage device, a service server, and a condition judging device; the storage device is configured to store a group member list and establish a session condition; The service server is configured to receive a group session request, obtain a group member list and establish a session condition according to the session request, and determine a session member related information according to the condition evaluation device to satisfy the establishment of the session.
  • the condition judging device is configured to obtain various information (including static information, and/or dynamic information) described in the group member establishment session condition according to the establishment session condition, and determine the group Member of this Whether the information satisfies the establishment of the session condition, and returns the judgment result to the service server.
  • the embodiment of the invention further provides a service server, including:
  • a receiving unit configured to receive a group session request, where the group session request includes a group identifier, a group member obtaining unit, configured to acquire a group member list according to the group identifier, and a group session establishing unit, configured to: Initiating a group session request to the group member and establishing a group session;
  • a tongue condition obtaining unit configured to acquire an establishment session condition corresponding to each group member in the group member list
  • the group member information obtaining unit is configured to obtain information described in establishing session conditions of each group member in the group member list.
  • the session creator is pre-established to establish a session condition
  • the service server compares the related information of the group member with the establishment condition, and only initiates a group request request for the group member that satisfies the establishment of the tongue condition. It joins the group tongue, which reduces the server burden, reduces network traffic, increases the flexibility of group sessions, and saves communication resources.
  • FIG. 1 is a schematic diagram of a system for establishing a group session in the prior art
  • FIG. 3 is a flowchart of establishing a group session according to an embodiment of the present invention.
  • FIG. 4 is a schematic diagram of a system for establishing a group session according to an embodiment of the present invention.
  • FIG. 5 is another flowchart of establishing a group session according to an embodiment of the present invention.
  • FIG. 6 is a flowchart of determining, by a service server, whether to join a group member to a group session according to the obtained group member related information according to an embodiment of the present invention
  • Figure ⁇ is a flow chart of processing a change of group member status information by a service server according to an embodiment of the present invention
  • FIG. 8 is a schematic block diagram of a service server according to an embodiment of the present invention.
  • the group creator or the authorized member in the group initiates a group session request to the service server through the client, and includes the group identifier in the group session request;
  • the service server obtains a group member list and establishes a tongue condition according to the information in the request, that is, the group identifier;
  • the group member list and the establishment session condition may be saved in a group member information file created in advance, and the group member information file is queried according to the group identifier in the group session request, directly from the group member information file. Obtain a list of group members and establish a tongue condition;
  • the group member list and the establishment session condition may also be saved in different files, for example, the group member list is stored in the group member information file, and the group member information file is also saved in each group.
  • the member corresponds to the reference to establish the session condition; thus, when querying, the group member information file is first queried according to the group identifier in the group request, the group member list is obtained, and then the group member list is obtained according to the group member list. Reference to the establishment of the tongue condition to find the corresponding file, and obtain the establishment session condition corresponding to each group member;
  • the service server acquires various related information about the establishment of the session condition of the group member, and determines whether the information satisfies the establishment of the session condition;
  • the related information herein includes various information described in establishing a session condition, including: static information and/or dynamic information, which can be obtained in various ways, for example, obtaining the static information by means of a query;
  • the notification method acquires the dynamic information.
  • the service server initiates a setup group session request and establishes a group session to a client that satisfies the group member that established the session condition.
  • the related information of each group member in the group member list may be checked in advance to determine whether the session condition is met, and the judgment result is recorded, and after all group members are checked, Initiating a group association request and establishing a group tongue to a client that meets the group member that meets the establishment condition; and may also check related information of each group member in the group member list in turn, and determine Whether it satisfies the session condition and records the judgment result.
  • the group member's client initiates a group session request and establishes a group session, and then Check the next group member again.
  • an embodiment of the present invention further provides a system for establishing a group tongue.
  • the system includes: a storage device 42, a service server 41, and a condition judging device 44.
  • the storage device 42 is configured to store files and data related to the service, such as creating a group member list and establishing session conditions, and public information shared by the plurality of services, and accepting the request of the service server 41 to provide relevant information for the service server 41.
  • the establishment of the session condition can exist either as part of the group member list or as a separate file. When present as a separate file, it is necessary to reference the file that establishes the group condition in the group member list.
  • the storage device when present as a separate file, the storage device further includes a setup session condition storage means 421 for storing a condition for establishing a group session and providing a establishment session condition to the service server according to the request of the service server.
  • the establishment session condition storage means 421 can be implemented by an XDMS (XML Document Management Server) or a database, depending on the form taken to establish the session condition.
  • the establishment of the session condition storage means 421 can also be independent of the storage means 42.
  • the establishment session condition storage means 421 is configured to receive the request of the service server 41 when the group member list includes the reference of the establishment condition, send the establishment condition to the service server 41, and establish the storage according to the request of the storage device 42. Conversational conditions.
  • the condition judging device 44 is configured to use the group member list issued by the service server 41 and the establishment condition (when the group member list includes the establishment condition) or the group member list (when the group member list does not include the establishment of the tongue) When the condition is met, the related information of the group member is obtained, and the related information of the obtained group member is parsed, the group member is determined to meet the establishment session condition, and the evaluation result is returned to the service server 41.
  • the condition judging device supports the XCAP (XML Configuration Access Protocol) protocol and the SIP (Session Initiation Protocol) protocol, and can be implemented as an internal device of the service server 41 and the storage device 42, or as a separate
  • the service server 41 is configured to receive a request for establishing a group session, obtain a group member list and establish a session condition by using the storage device 42 according to the request, and transmit the group member list and the establishment session condition to the condition judging device 44, and receive the condition.
  • the judgment result of the device 44 is judged, and a group session is established based on the result of the judgment.
  • the service-related files and data may be stored in the storage device 42 in advance, or the client 43 may be set in the system, and the group member list and the setup condition are sent to the storage device 42 by the client 43.
  • the client 43 includes a service client 432 and a storage device client 431.
  • the service client 432 is configured to send a request to establish a group session to the service server 41, and Perform a group session.
  • the storage device client 431 is configured to manage files and data stored in the storage device 42, such as creating a group member list and establishing a tongue condition, and transmitting the group member list and establishing session conditions to the storage device 42.
  • the service server can initiate a group request to join the group session only for the group member that meets the establishment condition, thereby reducing the server load, reducing network traffic, and increasing the network traffic.
  • the flexibility of group sessions which in turn saves communication resources.
  • the service server may obtain the change of the group member state information during the session, so as to determine whether the session condition is met or continues to be satisfied according to the changed information, thereby determining whether to join the group session or whether to Expel the group session to achieve dynamic control of the group session. Therefore, the problem that the group session cannot be dynamically controlled according to the group member status in the prior art is solved.
  • Step 501 The group creator creates a group member list and establishes a session condition by using a storage device client of the user terminal, and stores the session condition on the corresponding storage device by using an XCAP protocol or an HTTP (Hypertext Transfer Protocol) protocol;
  • the establishment session condition may be a set of conditions, including static conditions, dynamic conditions, time-related conditions, and QoE (Quality of Experience) conditions.
  • the static condition refers to a condition formed according to static information of a group member, and the static information includes: a name of a group member, a gender, a communication address, an alias, a date of birth, a communication ability, a preference, and the like;
  • the condition that the current status information of the group member is formed, the dynamic information includes: presence information, location information, and the like, and the presence information may include activities, time zones, emotions, whether the group members are currently engaged in participating in other sessions.
  • Information such as the service device identifier, and the location information may include information such as the current geographical location and maximum distance of the group member; time-related conditions, that is, conditions formed by information such as time period and date, indicating the time period during which the group session is initiated.
  • the QoE condition refers to the quality of the session that the group members experience during the group session. It is divided into four levels, namely Basic (basic level), Professional (professional user level), Crisis (emergency), and Official Government Use (official). The level used by the government).
  • Establishing session conditions may also include conditional information related to other business servers, not limited to the above information. Further, establishing the session condition may further include setting a minimum number of people in the group session, that is, limiting the minimum number of people participating in the group. When the number of group members satisfying the establishment of the session condition does not satisfy the condition, the group session cannot be built.
  • the establishment of the session condition can exist either as part of the group member list or as a separate file. When present as a separate file, it is necessary to reference the establishment of the session condition file in the group member list, for example, when the group member list is present.
  • the condition file is created in the form of XML (Extensible Markup Language), for the group identified as sipxhatgroup@poc.com, the group member list may include the following references to establish session conditions:
  • condition-ref http://xcap.example om/services/org.ietf.grouprules/user/sip:c hatgroup@poc . com/ grouprules ⁇ /condition-ref>
  • the above reference is for the establishment of the session condition file.
  • the access path, the path construction rule follows the construction method of the XCAP URI (Uniform Resource Identifier).
  • the ⁇ condition-set> element is a root element representing a condition set
  • the condition set contains ⁇ profile-condition>, ⁇ dynamicInfo-condition>, ⁇ QoE-condition> , ⁇ scheduling-condition> four sub-elements, where ⁇ 1" ( ⁇ 116-(; 011 (1 011> represents a static condition, corresponding to the above static information, can contain ⁇ name>, ⁇ gender>, ⁇ hobbies>
  • Sub-elements such as ⁇ alias> and ⁇ birthday> represent information such as name, gender, hobbies, aliases, birthdays, etc.
  • ⁇ dynamicInfo-condition> represents a dynamic condition, corresponding to the above dynamic information, may contain ⁇ presence> ⁇ location> il two sub-elements, where ⁇ presence> represents the current state information, which may contain ⁇ 3.
  • the current emotional state of the members participating in the group conversation group should be "happy"
  • ⁇ location> indicates the current location and maximum distance of the group members who are required to participate in the group session , can include ⁇ 860 ⁇ 3 1 ⁇ -100&1 011> and
  • the group members who participate in the group conversation according to the above example should be in the "Shenzhen"; ⁇ (5( ⁇ 011( ⁇ 011> indicates the group that is required to participate in the group conversation)
  • the QoE level of a group member can contain a child element, that is, ⁇ 61> indicates the level of QoE.
  • the QoE level of the group member who is required to participate in the group session is "professional user level,.. ⁇ scheduling- Condition> Indicates the time period during which a group session can be initiated, including ⁇ &0111> and ⁇ 1 « ⁇ 1>, which respectively indicate the start time and end time of the valid time period.
  • Step 502 The storage is successful, and the storage device returns an ok response; otherwise, the failure response is returned;
  • Step 503 The first group member initiates a group session request to the service server by using the user terminal, where the request includes an identifier of the group, where the first A group member can be a group creator or an authorized group member in a group;
  • Step 504 The service server initiates a request for obtaining a member list and establishing a session condition according to the information included in the request to the storage device.
  • Step 505 After obtaining the success, the storage device returns an ok response to the service server, and sends the content requested by the service server as a message body of the ok response to the service server;
  • Step 506 The service server acquires related information about the group member establishment condition, wherein the group member establishes the session condition related information to establish a set of dynamic information and static information described in the session condition, for example, the gender condition 611 (161" ⁇ 611 ⁇ 16 ⁇ 611(161, the relevant information is gender, ie
  • Step 507 The service server initiates a group establishment request to the group member that satisfies the establishment of the session condition by using the INVITE method of the SIP protocol.
  • Step 508 The group member (group creator) who satisfies the establishment of the session condition agrees to the invitation of the group session initiator, and returns a success response ok to the service server;
  • Step 509 After receiving the returned successful response, the service server returns a successful response to the group session initiator (group member 1).
  • Step 510 The service server successfully establishes a group session between the group creator and the group session initiator (group member 1).
  • the service server obtains the information about the group member establishment condition and determines whether the current status of the group member meets the requirements for establishing the session condition as follows:
  • Step 601 the service server determines whether the obtained group member list contains the establishment session condition, if not included, step 602 is performed, otherwise step 604 is directly executed;
  • Step 602 A reference to establish a session condition included in the member list of the ear group;
  • Step 603 The service server initiates a request for establishing a session condition to the storage device by using an XCAP protocol or an HTTP protocol according to the reference to establish a session condition in the group member list.
  • Step 604 The service server acquires, according to the group member list, various related information described in the group member establishment session condition.
  • the method for the service server to obtain various related information of the group members varies according to the type of the condition information.
  • the service server can obtain the existing information stored on the storage device by means of query.
  • the service server can query the static information of a group member from the XDMS (shared XDMS) through the XCAP protocol and the XPath language, for example, for the identifier sip:myfriend@example.
  • the com group member the service server can obtain the group member's ⁇ ⁇ 611 from the storage device according to the static condition in the above establishment session condition instance by the following query statement (161 static information, ⁇ hobbies ⁇ query method and ⁇
  • the gender> element has the same query method:
  • the business server can directly query the static information of the group members by using a SQL (Structured Query Language) query.
  • SQL Structured Query Language
  • QoE is usually a kind of static information. It can be stored in the XDMS or database together with the other static information of the group members. Therefore, the QoE information acquisition method and static information are used. The acquisition method is consistent.
  • the business server is required to be obtained from the presence service server and the location business server.
  • the service server needs to subscribe the presence information of the group members to the presence service server, and the service server can use the identity of the group creator, that is, the SIP URI of the group creator is used.
  • the SUBSCRIBE method of the SIP protocol subscribes the presentation service server to the presence information of each group member in the group member list. You can take a subscription or a long-term subscription.
  • the validity period of the subscription can use the maximum value of the subscription validity period (7200 seconds), and a filter can be set in the subscription message to subscribe only to the content described in the establishment session condition file.
  • the presence service server notifies the service server of the current status of the subscribed group members through the NOTIFY method of the SIP protocol.
  • the service server can send a valid header field equal to The zero SUBSCRIBE message cancels the subscription to the information presented by all group members. If the subscription expires during the group session, the business server can send the subscription request again to refresh the subscription.
  • the method of obtaining the location information can also adopt the method of subscribing to the notification.
  • the validity period of the subscription is set to 0, and the content described in the Create Session Condition can also be set in the subscription message.
  • the presence service server notifies the service server of the current status of the subscribed group members through the NOTIFY method of the SIP protocol. However, because it is only one subscription, the service server will not receive any notification when the group member's presence information changes, and the business server does not need to cancel the subscription.
  • Step 605 Determine whether the various related information of the group member meets the condition for joining the group session; compare the obtained various related information of each group member with the establishment session condition, if all the related members of the group are related If the information is satisfied to establish the session condition, step 606 is performed. If there is a message that does not match during the comparison, the remaining information does not need to be compared, and step 607 is performed.
  • Step 606 The service server initiates a group establishment tongue request by using a INVITE method of the SIP protocol to a group member that satisfies the establishment of the session condition.
  • Step 607 If not satisfied, the group member that does not satisfy the establishment of the session condition does not take any action or may only send a notification of the SIP message or send a notification of the short message, and notify the group member that does not satisfy the establishment of the session condition is not invited.
  • the service server receives the notification of the current state change of the second group member during the group session (including the presence status change or the location status change of the second group member)
  • the notification caused by the change of the static information of the second group member in the notification or storage device, for example, the ⁇ mood;M state of the second group member is changed from happy to unhappy, and the processing flow of the business server is as follows:
  • Step 701 The service server receives a notification that the status of the second group member changes.
  • Step 702 Determine whether the second group member has joined the group session, and if yes, perform the step
  • Step 703 Determine whether the current state of the second group member meets the establishment condition, if the step 710 is directly performed, otherwise step 704 is performed;
  • Step 704 Determine, according to the group session policy established by the group creator, whether the group needs to be used. The member expels the group ⁇ tongue, if necessary, step 705 is performed. If the group creator does not set this element when creating the group, the default value of the element is not eviction, and step 710 is directly performed; wherein the group session policy is a set of conditions and actions, representing the group The authorization policy for the group. Each policy consists of zero or more rules, each consisting of a conditional child and a behavioral child. In order to control the function of group members to join and leave the group session during the group session, it is necessary to increase the related control strategy.
  • the control policy includes a description of the processing method when the group member status changes during the group session, and is set by the group creator when creating the group.
  • the following two aspects can be added to the group session policy file: 1
  • For group members who have joined the group session increase the policy of whether to expel the group members from the group when their status changes during the process, for example, add ⁇ expel in ⁇ action>: H ⁇ element, whose value is a Boolean variable. When true (true), it means that if the current state of the group member does not satisfy the establishment of the tongue condition during the process of the tongue, the group that has already joined the group will be added. Members are evicted from the group session. When they are false (branch), they are not eviction. The default value is false.
  • Step 705 Deport the second group member by the BYE method of the SIP protocol, and perform step 709.
  • Step 706 Compare the current state of the second group member with the establishment condition, and determine the current status of the second group member. Whether the condition of establishing the tongue is satisfied, if step 707 is performed, otherwise step 710 is directly executed;
  • Step 707 Determine, according to the group policy, whether the second group member needs to be added to the group session. If the group creator does not set the element when creating the group, the default value of the element is added to the group. Session, go to step 708, otherwise go directly to step 710;
  • Step 708 Invite the second group member to join the group session, that is, send a SIP INVITE request to the second group member;
  • Step 709 Record the members participating in the group and the members who did not participate in the group session.
  • Step 710 ending the process.
  • the embodiment of the present invention further provides a service server. As shown in FIG. 8, the method includes: a receiving unit 81, a group member obtaining unit 82, a session condition obtaining unit 83, a group member information acquiring unit 84, and a condition evaluation unit 85. And group session establishing unit 86.
  • the receiving unit 81 receives a group session request, where the group session request includes a group identifier; then the group member obtaining unit 82 obtains a group member list according to the group identifier, and the group member list may be stored outside the service server. For example, in the storage device 42 in FIG. 4; it may also be stored inside the service server.
  • the session condition obtaining unit 83 acquires the establishment condition corresponding to each group member in the group member list.
  • the setup conditions corresponding to the group members may be stored outside the service server together with the group member list, or may be stored separately in the service server, for example, in the storage unit 80 shown in FIG.
  • the storage unit 80 can be a database or an XDMSo.
  • the manner in which the group member obtaining unit 82 obtains the group member list, and the manner in which the session condition obtaining unit 83 obtains the session condition corresponding to each group member may also be various. For details, refer to FIG. 4 . The description is similar, and is not mentioned here.
  • the group member information obtaining unit 84 acquires each group member in the group member list, in order to avoid the request for the group member to establish the group session.
  • the information described in the establishment of the tongue condition, the information includes static information and/or dynamic information, which varies according to the establishment of the session conditions corresponding to each group member, and the manner of obtaining different information is also different. This has been described in detail in the foregoing embodiments.
  • the condition evaluation unit 85 determines whether the various related information of the group member's establishment session condition description satisfies the establishment of the session condition, that is, each of the obtained related information and the establishment condition of the group member. Corresponding information is matched. If all the information is met, it indicates that the member of the group satisfies the establishment of the session condition. Otherwise, if one piece of information does not meet the corresponding information in the establishment condition of the member of the group, it indicates that the member of the group is not satisfied. Conversational conditions. The result of the judgment is then transmitted to the group session establishing unit 86.
  • the group session establishing unit 86 initiates a group session request to the group member who satisfies the establishment of the session condition, and establishes a group session.
  • the condition evaluation unit 85 can judge the result each time after judging a group member
  • the group session establishing unit 86 transmits the determination result by the group session establishing unit 86; the condition evaluation unit 85 can also record the judgment result by itself, after all the group members in the group member list are judged to be completed. Then, the judgment result is transmitted to the group session establishing unit 86.
  • the condition judging unit 85 further includes a group member identifier that satisfies the establishment of the session condition to the group session establishing unit 86, and may further include a group member identifier that does not satisfy the establishment of the session condition.
  • the group session establishing unit 86 can initiate a request to establish a group session only to the group members who satisfy the establishment of the session condition according to the information, thereby saving system resources. Moreover, the group member that does not satisfy the establishment of the session condition may be further sent a message carrying the reason for not sending the group establishment request.
  • the embodiment of the present invention adopts a pre-establishment of a session condition by the group creator, and the service server compares the information of the group member with the establishment of the session condition, and invites only the group members who satisfy the establishment of the session condition to join.
  • the group session, and the service server can obtain the change of the group member status information in the process of the tongue, thereby determining whether the session establishment system is satisfied or continues to be satisfied according to the changed information.
  • the program may be stored in a computer readable storage In the medium, the storage medium is, for example, a ROM/RAM, a magnetic disk, an optical disk, or the like.
  • the storage medium is, for example, a ROM/RAM, a magnetic disk, an optical disk, or the like.

Description

一种建立群组会话的方法、 系统及设备 本申请要求于 2006 年 6 月 28 日提交中国专利局、 申请号为 200610061393.2、 发明名称为"一种建立群组会话的方法和系统"的中国专利申 请的优先权， 其全部内容通过引用结合在本申请中。
技术领域
本发明涉及通讯技术， 尤其涉及一种建立群组会话的方法、 系统及设备。
背景技术
即时消息 （Instant Message , 以下简称 ΙΜ)和无线一键通 ( Push to Talk over Cellular, 以下简称 PoC )是当前广泛使用的通信系统， 这两种通信系统都提 供系统预设以及用户创建群组的功能，以实现用户对联系人的分类，例如 MSN Messenger, QQ、 ICQ中的聊天群组， PoC中的预定义群组和聊天群组等都是 群组应用的典型实例。
现有技术中， 实现静态群组的系统如图 1所示， 其中： 业务服务器 11为 业务提供应用层的网络功能， 可以执行控制功能和参与功能。 PoC业务服务器 和 IM业务服务器都是实现上述业务服务器功能的典型实例。 存储装置 12是 存储与业务相关的文件和数据的装置，所述文件和数据可以是多个业务共用的 公共信息， 存储装置 12还具有管理业务文件和数据的功能， 常用的存储装置 包括数据库、 XML ( Extensible Markup Language, 可扩展标记语言）文档管理 服务器等。 客户端 13包括存储装置客户端 131和业务客户端 132两个模块。 存储装置客户端 131是管理存储在网络中的文件和数据的客户端，具有创建或 取代一个文件和数据、删除一个文件和数据、获取一个文件和数据等功能。 业 务客户端 132具有支持与业务相关的功能， 例如当业务服务器是 PoC服务器 或 IM服务器时， 业务客户端应该支持会话发起、 参与、 终结， 支持对即时消 息通知的接收和发送操作等功能。
目前的静态群组信息保存在存储装置 12中， 群组信息文件中仅包含群组 成员列表， 即群组成员标识的集合， 当采用 XML的形式实现时群组成员列表 的形式如下：
<list- service uri="friend@example.com">
<display-name>myfriend</display-name> <list>
<entry uri=groupmemberl @example .com/>
<entry uri=groupmember2 @example.com/>
<entry uri=groupcreator@example.com/>
</list>
<list-service> 其中 <list-service>元素是群组信息文件的根元素， 表示这个文件描述的是 一个群组， 并用 uri属性表示这个群组的标识； <display-name>元素表示群组 的名字； <list>元素表示群组成员列表， <list>元素包含一个或多个<611^ >子元 素，每一个 <entry> ¾素表示一个群组成员 ,每个 <entry>元素都有一个 uri属性， 用来标识群组成员。
当业务服务器 11收到来自群组成员发起的群组^舌请求时， 业务服务器 11首先从存储装置 12中获取群组成员列表， 然后根据群组成员列表向群组中 所有成员发起群组会话请求， 当有群组成员应答此请求时，群组^舌就成功建 立起来。
现有技术中创建群组和建立群组会话的具体过程如图 2所示：
步骤 201、 群组创建者通过存储装置客户端创建群组成员列表， 并将其存 储在相应的存储装置上；
步骤 202、 存储成功， 存储装置返回 ok响应， 否则返回失败响应； 步骤 203、群组创建者或群组中的授权用户通过业务客户端向业务服务器 发起群组会话请求， 该请求中包含此群组的标识；
步骤 204、 业务服务器 ^居请求中的信息， 如群组标识， 向存储装置发起 获取群组成员列表的请求；
步骤 205、 获取成功， 存储装置向业务服务器返回 ok响应， 并将业务服 务器请求的群组成员列表发送给业务服务器；
步骤 206、 业务服务器解析获取到的群组成员列表；
步骤 207、 业务服务器根据解析结果向群组成员列表中的所有群组成员发 起群组会话请求；
步骤 208、 群组创建者同意参与群组会话，并向业务服务器返回 ok响应； 步骤 209、 业务服务器收到群组创建者的成功响应后向群组会话发起者 (群组成员 1 )发送成功响应；
步骤 210、 成功建立群组会话。
步骤 211、 某些群组成员 （群组成员 2 ) 由于某些原因 （例如用户终端关 闭等）无法参加群组 ^舌， 因此拒绝了此 ^舌请求。
然而， 在 IM和 PoC的通信系统中所使用的群组都是静态群组， 即在建立 群组会话之前创建者一定要制定一个明确的群组成员列表，在建立群组会话时 业务服务器根据群组成员列表中的成员标识向群组中的所有成员发起建立群 组会话请求， 对于当前不能建立群组^舌的成员来说， 无疑浪费了通信资源。
发明内容
本发明实施例一方面提供一种建立群组会话的方法，以选择满足条件的成 员来建立群组 ^舌， 从而节省通信资源。
本发明实施例另一方面还提供一种建立群组会话的系统，以选择满足条件 的成员来建立群组会话， 从而节省通信资源。
本发明实施例再一方面还提供一种业务服务器，以选择满足条件的部分成 员来建立群组 ^舌， 从而节省通信资源。
本发明实施例公开了一种建立群组会话的方法， 所述方法包括
根据接收的群组会话请求中的信息， 获取群组成员列表和建立会话条件； 获取所述群组成员列表中的各群组成员建立^舌条件中描述的各种信息； 确定所述各种信息满足所述建立^舌条件的群组成员；
向所述各种信息满足所述建立会话条件的群组成员发起建立群组会话请 求， 并建立群组会话。
此外， 本发明实施例另一方面还公开了一种建立群组会话的系统， 该系 统包括存储装置、业务服务器和条件评判装置； 所述存储装置用于存储群组成 员列表及建立会话条件； 所述业务服务器用于接收建立群组会话请求， 并根据 会话请求向存储装置获取群组成员列表和建立会话条件，并根据条件评判装置 发出的对群组成员相关信息的判断结果为满足建立会话条件的群组成员建立 群组会话； 所述条件评判装置， 用于根据建立会话条件获取群组成员建立会话 条件中描述的各种信息（包括静态信息， 和 /或动态信息）， 判断群组成员的这 些信息是否满足建立会话条件， 将判断结果返回给业务服务器。
本发明实施例还提供了一种业务服务器， 包括：
接收单元， 用于接收群组会话请求， 所述群组会话请求包括群组标识； 群组成员获取单元， 用于根据所述群组标识获取群组成员列表； 群组会话建立单元， 用于向群组成员发起建立群组会话请求， 并建立群组 会话；
^舌条件获取单元，用于获取所述群组成员列表中各群组成员对应的建立 会话条件；
群组成员信息获取单元， 用于获取所述群组成员列表中各群组成员的建 立会话条件中描述的信息。
本发明实施例采用通过群组创建者预先设立建立会话条件，业务服务器将 群组成员的相关信息与建立^舌条件比较，只对满足建立 ^舌条件的群组成员 发起群组^舌请求邀请其加入群组^舌，从而降低了服务器负担， 减少了网络 流量， 增加了群组会话的灵活性， 进而节省了通信资源。
附图说明
图 1为现有技术中建立群组会话的系统示意图；
图 2为现有技术中建立群组会话的流程图；
图 3为本发明实施例提供的建立群组会话的一种流程图；
图 4为本发明实施例提供的建立群组会话的系统示意图；
图 5为本发明实施例提供的建立群组会话的另一种流程图；
图 6 为本发明实施例提供的业务服务器根据获取到的群组成员相关信息 判断是否将此群组成员加入群组会话的流程图；
图 Ί 为本发明实施例提供的业务服务器处理群组成员状态信息变化的流 程图；
图 8是本发明实施例提供的业务服务器的原理框图。
具体实施方式
下面结合附图对本发明作进一步的详细描述。
首先， 参照图 3所示本发明实施例提供的建立群组会话的一种流程图： 301. 群组创建者或群组中的授权成员通过客户端向业务服务器发起群组 会话请求， 在该群组会话请求中包含群组标识；
302. 业务服务器根据请求中的信息， 即群组标识获取群组成员列表及建 立^舌条件；
所述群组成员列表及建立会话条件可以保存在预先创建的一个群组成员 信息文件中，根据群组会话请求中的群组标识查询该群组成员信息文件， 直接 从该群组成员信息文件中获得群组成员列表及建立^舌条件；
也可以将群组成员列表及建立会话条件分别保存在不同的文件中， 比如， 将群组成员列表存储在群组成员信息文件中，在该群组成员信息文件中还保存 了与各群组成员对应的对建立会话条件的引用； 这样， 在查询时， 首先才 据群 组^舌请求中的群组标识查询该群组成员信息文件，获得群组成员列表， 然后 根据该群组成员列表中的对建立^舌条件的引用查找相应的文件，获得与各群 组成员对应的建立会话条件；
303. 业务服务器获取群组成员的建立会话条件描述的各种相关信息， 判 断此信息是否满足建立会话条件；
此处的相关信息包括建立会话条件中描述的各种信息， 包括： 静态信息和 /或动态信息， 可以有多种方式来获取这些信息， 比如， 通过查询方式获取所 述静态信息； 通过订阅和通知方式获取所述动态信息。
304. 业务服务器向满足建立会话条件的群组成员的客户端发起建立群组 会话请求并建立群组会话。
在上述步骤 304中 ,可以先依次对所述群组成员列表中的各群组成员的相 关信息进行检查， 判断其是否满足会话条件， 并记录判断结果， 对所有群组成 员检查完成后，再向满足建立 ^舌条件的群组成员的客户端发起建立群组^舌 请求并建立群组^舌；还可以依次对所述群组成员列表中的各群组成员的相关 信息进行检查，判断其是否满足会话条件，并记录判断结果，每次检查完成后， 如果该群组成员满足建立^舌条件，则向该群组成员的客户端发起建立群组会 话请求并建立群组会话， 然后再检查下一个群组成员。
此外， 本发明实施例还提供一种建立群组 ^舌的系统。 如图 4所示， 该系 统包括： 存储装置 42, 业务服务器 41 和条件评判装置 44。 存储装置 42用于存储与业务相关的文件和数据， 如创建群组成员列表以 及建立会话条件， 以及多个业务共用的公共信息， 并接受业务服务器 41的请 求， 为业务服务器 41提供相关信息， 如创建群组成员列表以及建立会话条件 等。 其中， 建立会话条件既可以作为群组成员列表中的一部分存在， 也可以作 为一个单独的文件存在。 当作为一个单独的文件存在时， 需要在群组成员列表 中引用建立群组^舌条件的文件。 而且， 当作为一个单独的文件存在时， 存储 装置还包括建立会话条件存储装置 421 , 用于存储建立群组会话的条件以及根 据业务服务器的请求向业务服务器提供建立会话条件。而根据建立会话条件采 取的形式的不同， 建立会话条件存储装置 421 可以采用 XDMS ( XML Document Management Server, XML 文档管理服务器）或数据库来实现。
此外， 建立会话条件存储置装置 421还可以独立于存储装置 42。 其中， 建立会话条件存储装置 421用于当群组成员列表包含建立^舌条件的引用时， 接收业务服务器 41的请求， 向业务服务器 41发送建立^舌条件， 以及根据存 储装置 42的请求存储建立会话条件。 条件评判装置 44用于根据业务服务器 41 发出的群组成员列表和建立^舌条件（当群组成员列表包含建立^舌条件 时）或群组成员列表（当群组成员列表未包含建立^舌条件时）获取群组成员 的相关信息， 并解析所获取的群组成员的相关信息， 判断群组成员是否符合建 立会话条件， 并将评判结果返回给业务服务器 41。 条件评判装置支持 XCAP ( XMLConfiguration Access Protocol )协议和 SIP ( Session Initiation Protocol ) 协议， 既可以作为业务服务器 41和存储装置 42的内部装置实现， 又可以作为 一个单独的应用服务器实现。
业务服务器 41用于接收建立群组会话的请求， 根据该请求通过存储装置 42 获取群组成员列表及建立会话条件， 并将群组成员列表及建立会话条件传 送给条件评判装置 44, 并接收条件评判装置 44的判断结果， 以及根据其判断 结果建立群组会话。
可以预先将所述与业务相关的文件和数据存储到存储装置 42中， 也可以 在该系统中设置客户端 43， 由客户端 43将群组成员列表及建立^舌条件发送 至存储装置 42中。如图 4所示，客户端 43包括业务客户端 432及存储装置客 户端 431。 业务客户端 432用于向业务服务器 41发出建立群组会话请求， 并 执行群组会话的操作。 存储装置客户端 431用于管理存储在存储装置 42中的 文件和数据，如创建群组成员列表以及建立^舌条件， 并将群组成员列表及建 立会话条件发送至存储装置 42。
利用本发明实施例提供的系统，可以使业务服务器只对满足建立^舌条件 的群组成员发起群组 ^舌请求邀请其加入群组会话， 从而降低了服务器负担， 减少了网络流量， 增加了群组会话的灵活性， 进而节省了通信资源。
此外，本发明实施例业务服务器可以在会话过程中获取群组成员状态信息 的变化，从而根据其变化后的信息决定是否满足或继续满足建立会话条件，从 而决定是否让其加入群组会话或是否驱逐出群组会话以实现对群组会话的动 态控制。从而解决现有技术中不能根据群组成员状态对群组会话实现动态控制 的问题。
下面基于图 4所示系统对本发明实施例的方法进行伴细说明。
如图 5所示， 建立群组会话的方法的流程如下：
步骤 501、群组创建者通过用户终端的存储装置客户端创建群组成员列表 及建立会话条件， 并通过 XCAP协议或 HTTP ( Hypertext Transfer Protocol ) 协议将其存储在相应的存储装置上；
其中， 建立会话条件可以是一组条件的集合， 包含静态条件， 动态条件， 时间相关的条件， 以及 QoE ( Quality of Experience )条件等。 静态条件是指根 据群组成员的静态信息形成的条件， 所述的静态信息包括： 群组成员的姓名， 性别， 通信地址， 别名， 出生日期， 通信能力， 喜好等信息； 动态条件是指根 据群组成员的当前状态信息形成的条件， 所述的动态信息包括： 呈现信息， 位 置信息等，而呈现信息中可以包括表示群组成员当前从事的活动，时区，情绪， 是否参加了其他的会话，服务设备标识等信息， 而位置信息则可以包括群组成 员当前的地理位置， 最大距离等信息； 时间相关的条件， 即时间段， 日期等信 息形成的条件，表示发起群组会话的时间段； QoE条件是指群组成员在群组会 话时体验到的会话质量， 分为四个等级， 即 Basic (基础等级)、 Professional (专 业用户等级)、 Crisis (紧急情况）、 Official Government Use (官方政府使用的等 级)。 建立会话条件还可以包含与其他业务服务器相关的条件信息， 不仅限于 上述信息。 进一步， 建立会话条件还可以包含建立群组会话的最少人数限制，也就是 限制参加群组 ^舌的最少人数，当满足建立会话条件的群组成员数量不满足此 条件时， 群组会话是不能建立的。
建立会话条件既可以作为群组成员列表中的一部分存在，也可以作为一个 单独的文件存在，当作为单独的文件存在时需要在群组成员列表中引用建立会 话条件文件，例如当群组成员列表和建立^舌条件文件都采用 XML( Extensible Markup Language )的形式实现时，对于标识为 sipxhatgroup@poc.com的群组， 其群组成员列表中可以包含如下对建立会话条件的引用：
<condition-ref^http://xcap.example om/services/org.ietf.grouprules/user/sip:c hatgroup@poc . com/ grouprules</condition-ref> 上述的引用内容为建立会话条件文件的存取路径， 路径的构建规则遵循 XCAP URI ( Uniform Resource Identifier, 统一资源标识） 的构建方法。
建立会话条件用 XML的形式来描述时建立会话条件文件的实例如下：
<condition-set>
<profile-condition>
<gender>female</gender>
<hobbies>football</hobbies> </profile-condition> <dynamicInfo-condition>
<presence>
<mood>happy</mood>
</presence>
<location>
<geography-location>shenzhen</geography-location> </location> </dynamicInfo-condition> <QoE-condition>
<level>professional</level> </ QoE-condition> <scheduling-condition>
<from>2006-l 1-24T17:00:00+01 :00</from> <until>2006- 12-24T17 :00:00+01 :00</until> </ scheduling-condition> </condition-set> 上述实例描述了一个建立会话条件文件， 其中 <condition-set>元素是一个 根元素表示一个条件集合， 条件集合中 包含 <profile-condition>、 <dynamicInfo-condition>、 <QoE-condition>、 <scheduling-condition>四个子元素 , 其中 < 1"(^116-(；011(1 011>表示静态条件， 与上述的静态信息相对应， 可以包含 <name>、 <gender>、 <hobbies>、 <alias>、 <birthday>等子元素, 分别表示姓名、 性别、 爱好、 别名、 生日等信息， 上述实例中的描述就表示要求参加群组会话 的群组成员应该是"女性并且喜欢足球"； <dynamicInfo-condition>表示动态条 件，与上述的动态信息相对应，可以包含 <presence> <location>il两个子元素， 其中 <presence>表示当前的状态信息， 可以包含<3。1±^ >、 <mood>等子元素， 分别表示当前从事的活动以及情绪等当前状态，根据上述的实例要求参加群组 会话群组成员的当前情绪状态应该是"高兴的"； <location>表示要求参加群组 会话的群组成员的当前位置以及最大距离 , 可以包括 <860^3 1^-100&1 011>和
<(¾1&1^6>这两个子元素， 根据上述实例要求参加群组会话的群组成员的位置 应该是在"深圳"； <(5(^ 011(^011>表示要求参加群组会话的群组成员的 QoE 等级， 可以包含一个子元素， 即<^¥61>表示 QoE的等级， 在上述实例中要求 参加群组会话的群组成员的 QoE等级是 "专业用户级，，。 <scheduling-condition> 表示可以发起群组会话的时间段， 包括 <&0111>和<1«^1>这两个元素，分别表示 有效时间段的起始时间和终止时间。
步骤 502、 存储成功， 存储装置返回 ok响应； 否则返回失败响应； 步骤 503、 第一群组成员通过用户终端向业务服务器发起群组会话请求， 请求中包含此群组的标识符，其中第一群组成员可以是群组创建者或群组中经 授权的群组成员；
步骤 504、 业务服务器根据请求中包含的信息向存储装置发起获取成员列 表以及建立会话条件的请求；
步骤 505、 获取成功， 存储装置向业务服务器返回 ok响应， 并将业务服 务器请求的内容作为 ok响应的消息体发送给业务服务器；
步骤 506、 业务服务器获取群组成员建立^舌条件的相关信息， 其中群组 成员建立会话条件的相关信息指建立会话条件中描述的动态信息和静态信息 的集合， 如： 性别条件 611(161"^611^16< 611(161 , 其相关信息就是性别， 即
<gender>;
步骤 507、 业务服务器通过 SIP协议的 INVITE方法向满足建立会话条件 的群组成员发起建立群组 ^舌请求；
步骤 508、 满足建立会话条件的群组成员 （群组创建者） 同意了群组会话 发起者的邀请， 向业务服务器返回成功响应 ok;
步骤 509、 业务服务器收到返回的成功响应后向群组会话发起者（群组成 员 1 )返回成功响应；
步骤 510、 业务服务器在群组创建者和群组会话发起者（群组成员 1 )之 间成功的建立起群组会话。
其中， 参见图 6， 业务服务器获取群组成员建立^舌条件的相关信息并判 断此群组成员的当前状态是否满足建立会话条件的流程如下：
步骤 601、 业务服务器判断所获取的群组成员列表中是否包含建立会话条 件， 如没有包含， 执行步骤 602， 否则直接执行步骤 604;
步骤 602、 获耳 组成员列表中包含的建立会话条件的引用；
步骤 603、 业务服务器根据群组成员列表中建立会话条件的引用， 通过 XCAP协议或 HTTP协议向存储装置发起获取建立会话条件的请求； 步骤 604、 业务服务器根据群组成员列表获取群组成员建立会话条件中描 述的各种相关信息；
其中，业务服务器获取群组成员的各种相关信息的方法根据条件信息类型 的不同而不同。
对于静态条件来说，业务服务器可以通过查询的方式从存储装置上存储的 现有信息中获取。 对于采用 XDMS作为存储装置的系统中， 业务服务器可以 通过 XCAP协议与 Xpath语言相结合的方式从 XDMS (共享 XDMS )上查询 某个群组成员的静态信息，例如对于标识为 sip:myfriend@example.com的群组 成员，业务服务器根据上述建立会话条件实例中的静态条件可以通过如下的查 询语句从存储装置中获取该群组成员的<§611(161 静态信息， <hobbies^々查询方 法与 <gender>元素的查询方法相同：
http://xcap.example.eom/services/org.ietf.sharedxdms/user/sip:myfriend@example. com/ sharedprofile/— ///gender
而对于采用数据库作为存储装置的系统中， 业务服务器可以直接用 SQL ( Structured Query Language ,结构式查询语言 )查询语句查询群组成员的静态 信息。 对于 QoE条件而言， 通常情况下 QoE也是一种静态信息， 可以作为群 组成员的特性与群组成员的其他静态信息一起存储在 XDMS中或数据库中， 因此 QoE信息的获取方法与静态信息的获取方法一致。
对于动态条件而言，需要业务服务器从呈现业务服务器和位置业务服务器 获取。为了获得群组成员列表中群组成员的呈现信息需要业务服务器向呈现业 务服务器订阅群组成员的呈现信息，业务服务器可以使用群组创建者的身份标 识， 即使用群组创建者的 SIP URI通过 SIP协议的 SUBSCRIBE方法向呈现业 务服务器订阅群组成员列表中每一个群组成员的呈现信息。 可以采取一次订 阅， 也可以采取长期订阅。
当采取长期订阅时， 订阅的有效期可以使用订阅有效期的最大值（7200 秒）， 并且可以在订阅消息中设置过滤器来仅订阅建立会话条件文件中描述的 内容。订阅成功后呈现业务服务器通过 SIP协议的 NOTIFY方法将所订阅的群 组成员的当前状态通知业务服务器。在群组^舌结束之后，或群组 ^舌建立失 败之后，如果订阅还是有效的， 那么业务服务器可以发送一个有效期头域等于 零的 SUBSCRIBE消息取消对所有群组成员呈现信息的订阅。如果在群组会话 过程中， 订阅失效， 那么业务服务器可以再次发送订阅请求刷新订阅。 位置信 息的获取方法也可以采用订阅通知的方式。
当采取一次订阅时， 订阅的有效期设置为 0， 也可以在订阅消息中设置过 滤器仅订阅建立会话条件中描述的内容。 订阅成功后呈现业务服务器通过 SIP 协议的 NOTIFY方法将所订阅的群组成员的当前状态通知业务服务器。 但由 于仅是一次订阅，当群组成员的呈现信息发生变化时业务服务器不会再收到任 何通知， 业务服务器也不需要取消订阅等操作。
步骤 605、 判断群组成员的各种相关信息是否满足加入群组会话的条件； 将获取到的每一个群组成员的各种相关信息与建立会话条件一一对比，如果群 组成员的所有相关信息都满足建立会话条件， 则执行步骤 606， 如果在对比的 过程中如果有一个信息不符合则剩余的信息就不需要继续比较， 并执行步骤 607。
步骤 606、 业务服务器通过 SIP协议的 INVITE方法向满足建立会话条件 的群组成员发起建立群组 ^舌请求；
步骤 607、 如果不满足则对不满足建立会话条件的群组成员不采取任何动 作或可以仅发送一个 SIP消息的通知或发送短消息的通知，告知不满足建立会 话条件的群组成员没有被邀请加入群组^舌的原因。
参见图 7， 群组会话建立成功之后， 在群组会话的过程中如果业务服务器 收到第二群组成员当前状态变化的通知（包括由于第二群组成员的呈现状态变 化或位置状态变化而引起的通知或存储装置中第二群组成员的静态信息变化 而 )起的通知 ) , 例如第二群组成员的 <mood;M 态由 happy变为 unhappy , 业 务服务器的处理流程如下：
步骤 701、 业务服务器收到第二群组成员状态变化的通知；
步骤 702、 判断第二群组成员是否已经加入到群组会话， 如是， 执行步骤
703 , 否则直接执行步骤 706;
步骤 703、 判断第二群组成员的当前状态是否满足建立^舌条件， 如是直 接执行步骤 710， 否则执行步骤 704;
步骤 704、根据群组创建者建立的群组会话策略来判断是否需要将此群组 成员驱逐出群组^舌， 如果需要执行步骤 705。 如果群组创建者在创建群组时 没有对此元素进行设置， 那么此元素的默认值为不驱逐， 直接执行步骤 710; 其中，群组会话策略是一组条件和动作的集合，代表这个群组的授权策略。 每一个策略由 0个或多个规则组成，每个规则由一个条件子项和一个行为子项 组成。 为了实现在群组会话过程中控制群组成员加入和退出群组会话的功能， 需要增加相关的控制策略。控制策略中包含描述在群组会话过程中群组成员状 态发生变化时的处理方法， 并且由群组创建者在创建群组时设置，可以在群组 会话策略文件中增加如下两方面的内容： 1 对已经加入群组会话的群组成员来 说，增加当其状态在^舌过程中发生变化时是否将群组成员驱逐出群组^舌的 策略， 例如在 <action>中增加 <expel:H^元素， 其值为布尔型的变量， 当为 true (真）时表示在 ^舌的过程中如果群组成员的当前状态不满足建立^舌条件则 将已经加入群组^舌的群组成员从群组会话中驱逐出去， 当为 false ( 支） 时， 则不驱逐， 默认值为 false; 2对未加入群组会话的群组成员来说， 增加当其 状态在会话过程中变化时是否邀请群组成员加入群组会话的策略， 例如在 <action>中增力 p<joined-session>子元素 , 其值为布尔型的变量 , 当为 true (真 ) 时表示在会话的过程中如果未加入群组会话的群组成员的当前状态满足建立 会话条件则将其加入到群组会话中， 当为 false ( 支） 时， 则不加入， 默认值 为 true。
步骤 705、通过 SIP协议的 BYE方法驱逐第二群组成员，并执行步骤 709; 步骤 706、 将第二群组成员的当前状态与建立 ^舌条件进行对比， 判断第 二群组成员的当前状态是否满足建立^舌条件， 如果是执行步骤 707, 否则直 接执行步骤 710;
步骤 707、 根据群组策略判断是否需要将第二群组成员加入群组会话， 如 果群组创建者在创建群组时没有对此元素进行设置，那么此元素的默认值为将 其加入群组会话， 执行步骤 708， 否则直接执行步骤 710;
步骤 708、 邀请第二群组成员加入群组会话， 即向第二群组成员发送 SIP INVITE请求；
步骤 709、 记录参加群组 ^舌和未参加群组会话的成员。
步骤 710、 结束流程。 本发明实施例还提供了一种业务服务器， 如图 8 所示， 包括： 接收单元 81、群组成员获取单元 82、会话条件获取单元 83、群组成员信息获取单元 84、 条件评判断单元 85和群组会话建立单元 86。
接收单元 81接收群组会话请求， 所述群组会话请求包括群组标识； 然后 由群组成员获取单元 82根据所 组标识获取群组成员列表， 该群组成员列 表可以存储在业务服务器的外部， 比如， 图 4中的存储装置 42中； 也可以存 储在业务服务器的内部。
然后再由会话条件获取单元 83获取所述群组成员列表中各群组成员对应 的建立 ^舌条件。 同样， 与群组成员对应的建立^舌条件可以和群组成员列表 一起存储在业务服务器的外部， 也可以独立存放在业务服务器内部， 比如， 存 储在图 8 中所示的存储单元 80 中。 存储单元 80可以是数据库， 也可以是 XDMSo
根据存储方式的不同， 群组成员获取单元 82获取群组成员列表的方式， 以及会话条件获取单元 83获取与各群组成员对应的会话条件的方式也可以是 多样的， 具体可参照图 4中的描述， 与其类似， 在此不再赞述。
为了避免对当前不能建立群组会话的群组成员也发起建立群组会话的请 求， 节省资源， 本发明实施例中由群组成员信息获取单元 84获取所述群组成 员列表中各群组成员的建立 ^舌条件中描述的信息，这些信息包括静态信息和 /或动态信息， 根据每个群组成员对应的建立会话条件的不同会有所不同， 而 且对于不同信息的获取方式也会不同， 对此前面的实施例中已有详细说明。
然后， 由条件评判断单元 85判断群组成员的建立会话条件描述的各种相 关信息是否满足建立会话条件，也就是说，将得到的各种相关信息与该群组成 员的建立条件中的每条相应信息进行对应，如果全部符合， 则表明该群组成员 满足建立会话条件， 否则， 只要有一项信息不符合该群组成员的建立条件中的 相应信息， 则表明该群组成员不满足建立会话条件。 然后将判断结果传送给群 组会话建立单元 86。
群组会话建立单元 86根据该结果， 向满足建立会话条件的群组成员发起 建立群组会话请求， 并建立群组会话。
条件评判断单元 85可以在每次对一个群组成员进行判断后， 将判断结果 传送给群组会话建立单元 86, 由群组会话建立单元 86记录判断结果； 条件评 判断单元 85也可以自己记录判断结果， 在对所述群组成员列表中的所有群组 成员判断全部完成后， 再向群组会话建立单元 86传送判断结果。 当然， 条件 判断单元 85向群组会话建立单元 86还包括满足建立会话条件的群组成员标 识， 还可以进一步包括不满足建立会话条件的群组成员标识。 这样， 群组会话 建立单元 86就可以根据这些信息只向满足建立会话条件的群组成员发起建立 群组会话的请求，从而节省了系统资源。 而且还可进一步向不满足建立会话条 件的群组成员发送携带不向其发送建立群组^舌请求原因的消息。从以上方案 可以看出，本发明实施例采用通过群组创建者预先设立建立会话条件， 业务服 务器根据群组成员的信息与建立会话条件比较，只对满足建立会话条件的群组 成员邀请其加入群组会话 ,以及业务服务器可以在^舌过程中获取群组成员状 态信息的变化，从而根据其变化后的信息决定是否满足或继续满足建立会话条 制。 、 、 ' 、 ¾ ' 本领域普通技术人员可以理解，实现上述实施例方法中的全部或部分步骤 是可以通过程序来指令相关的硬件来完成，所述的程序可以存储于一计算机可 读取存储介质中， 所述的存储介质， 如： ROM/RAM、 磁碟、 光盘等。 明的精神和范围。这样，倘若本发明的这些修改和变型属于本发明权利要求及 其等同技术的范围之内， 则本发明包含这些改动和变型在内。

Claims

权 利 要 求
1. 一种建立群组会话的方法， 其特征在于， 所述方法包括：
根据接收的群组会话请求中的信息， 获取群组成员列表和建立会话条件； 获取所述建立会话条件中描述的各种信息；
确定所述各种信息满足所述建立会话条件的群组成员；
向所述各种信息满足所述建立会话条件的群组成员发起建立群组会话请 求， 并建立群组会话。
2. 如权利要求 1所述的建立群组会话的方法， 其特征在于， 所述获取群 组成员列表和建立会话条件的步骤包括：
根据所述群组会话请求中的群组标识查询预先创建的群组成员信息文件， 所述群组成员信息文件包括群组成员及建立^舌条件，获取与所述群组标识对 应的群组成员列表， 以及建立会话条件。
3. 如权利要求 1所述的建立群组会话的方法， 其特征在于， 所述获取群 组成员列表和建立会话条件的步骤包括：
根据所述群组会话请求中的群组标识查询预先创建的群组成员信息表，所 述群组成员信息表包括群组成员及与所述群组成员对应的对建立会话条件的 引用；
获取与所述群组标识对应的群组成员列表；
根据所述对建立^舌条件的引用获取所述建立 ^舌条件。
4. 如权利要求 1所述的建立群组会话的方法， 其特征在于， 所述建立会 话条件中描述的各种当前信息包括： 静态信息和 /或动态信息；
通过查询方式获取所述静态信息；
通过订阅和通知方式获取所述动态信息。
5. 如权利要求 1至 4任一项所述的建立群组会话的方法， 其特征在于， 所述确定各种信息满足所述建立会话条件的群组成员的步骤包括：
如果所述群组成员的建立会话条件中描述的各种信息完全满足所述建立 会话条件， 则确定该群组成员满足建立会话条件， 否则确定该群组成员不满足 建立会话条件。
6. 如权利要求 1所述的建立群组会话的方法， 其特征在于， 所述方法进 一步包括：
向不满足建立会话条件的群组成员发送携带不向其发送建立群组会话请 求原因的消息。
7. 如权利要求 1所述的建立群组会话的方法， 其特征在于， 所述方法还 包括：
在群组会话过程中 ,根据预先设立的群组会话策略以及获得的群组成员相 关信息决定是否将状态发生变化了的群组成员加入或驱逐出群组^舌。
8. 如权利要求 7所述的建立群组会话的方法， 其特征在于，
采用订阅和通知的方式获得所述群组成员的相关信息的变化； 或者 采用轮询的方式获得所述群组成员的相关信息的变化。
9. 一种建立群组会话的系统， 其特征在于， 所述系统包括存储装置、 业 务服务器和条件评判装置；
所述存储装置用于存储群组成员列表及建立会话条件；
所述业务服务器用于接收建立群组会话请求，并根据会话请求向所述存储 装置获 组成员列表和建立会话条件，并根据条件评判装置发出的对群组成 员相关信息的判断结果为满足建立 ^舌条件的群组成员建立群组^舌；
所述条件评判装置，用于根据建立会话条件获取群组成员的建立会话条件 描述的各种信息， 并判断所述各种信息是否满足建立会话条件，将判断结果返 回给业务服务器。
10. 如权利要求 10所述的建立群组^舌的系统， 其特征在于， 所述系统 还包括：
客户端， 用于向业务服务器发出建立群组会话请求， 以及执行群组 ^舌的 操作， 以及向所述存储装置发送群组成员列表和建立^舌条件。
11. 如权利要求 10所述的建立群组会话的系统， 其特征在于， 所述客户 端包括： 存储装置客户端、 业务客户端；
所述存储装置客户端用于创建群组成员列表及建立会话条件，并将所述群 组成员列表及建立会话条件发送到存储装置存储；
所述业务客户端用于向业务服务器发出建立群组会话请求，以及执行群组 会话的操作。
12. 如权利要求 9或 10所述的建立群组会话的系统， 其特征在于， 所述 系统还包括：
^舌条件存储装置， 用于存储客户端发出的建立会话条件， 所述建立会话 条件存储装置存在于存储装置中或作为独立的装置存在。
13. 如权利要求 9或 10所述的建立群组^舌的系统， 其特征在于， 所述 条件评判装置存在于业务服务器中或作为独立的装置存在。
14. 一种业务服务器， 包括：
接收单元， 用于接收群组会话请求， 所述群组会话请求包括群组标识； 群组成员获取单元， 用于根据所述群组标识获取群组成员列表； 群组会话建立单元， 用于向群组成员发起建立群组会话请求， 并建立群组 会话； 其特征在于， 还包括：
^舌条件获取单元，用于获取所述群组成员列表中各群组成员对应的建立 会话条件；
群组成员信息获取单元，用于获取所述群组成员列表中各群组成员的建立 会话条件中描述的各种信息。
15. 如权利要求 14所述的业务服务器， 其特征在于， 所述业务服务器还 包括：
条件评判单元， 用于判断群组成员的所述各种信息是否满足建立会话条 件， 并将判断结果传送给所述群组会话建立单元。
16.如权利要求 14或 15所述的业务服务器， 其特征在于， 所述业务服务 器还包括：
存储单元， 用于存储群组成员对应的建立会话条件。
17.如权利要求 16所述的业务服务器， 其特征在于， 所述存储单元为数 据库或 XML文档管理服务器 XDMS。
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