WO2009067866A1 - Procédé et système de réseau pour établir des sessions dans un service de diffusion/multidiffusion multimédia - Google Patents

Procédé et système de réseau pour établir des sessions dans un service de diffusion/multidiffusion multimédia Download PDF

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Publication number
WO2009067866A1
WO2009067866A1 PCT/CN2008/071245 CN2008071245W WO2009067866A1 WO 2009067866 A1 WO2009067866 A1 WO 2009067866A1 CN 2008071245 W CN2008071245 W CN 2008071245W WO 2009067866 A1 WO2009067866 A1 WO 2009067866A1
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WIPO (PCT)
Prior art keywords
session
network element
element device
establishing
message
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PCT/CN2008/071245
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English (en)
Chinese (zh)
Inventor
Qingchun Lin
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Huawei Technologies Co., Ltd.
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Application filed by Huawei Technologies Co., Ltd. filed Critical Huawei Technologies Co., Ltd.
Publication of WO2009067866A1 publication Critical patent/WO2009067866A1/fr

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Classifications

    • 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
    • H04L12/1863—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast comprising mechanisms for improved reliability, e.g. status reports
    • H04L12/1877—Measures taken prior to transmission
    • 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
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/40—Connection management for selective distribution or broadcast
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/18—Management of setup rejection or failure

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a method and network system for establishing a session in a multimedia broadcast multicast service.
  • Multimedia Broadcast/Multicast Service is defined by the 3rd Generation Partnership Project (3GPP) for point-to-multipoint one-way multimedia services.
  • 3GPP 3rd Generation Partnership Project
  • the MBMS uses the air interface to transmit multimedia broadcast services to users in the cell through the common channel, or multicasts the multicast service subscribed by the user to the users in the cell, thereby saving air interface resources.
  • the main application of MBMS is the mobile TV service. In addition, it can also support services such as broadcast download and music TV interaction.
  • MBMS is based on General Packet Radio Service (GPRS, Wideband Code Division Multiple Access) packet network, by adding some new functional entities, such as broadcast multicast service center (BM- SC, Broadcast-Multicast Service Centre), and existing packet domain functional entities such as GPRS Serving GPRS Support Node (SGSN), GPRS Gateway Support Node (GGSN), Base Station Controller (BSC) , Base Station Controller) / Radio Network Controller (RNC) and User Terminal (UE, User Equipment) add MBMS function, and define a new logical shared channel to achieve air interface resource sharing.
  • GPRS General Packet Radio Service
  • BM- SC Broadcast-Multicast Service Centre
  • SGSN GPRS Serving GPRS Support Node
  • GGSN GPRS Gateway Support Node
  • BSC Base Station Controller
  • RNC Radio Network Controller
  • UE User Equipment
  • MBMS defines two services: broadcast service and multicast service.
  • the establishment process of the connection between different network element devices in the MBMS in the prior art is one-way. From the BM-SC to the GGSN, the SGSN, the BSC/RNC, the network element devices establish a session in turn, if two network element devices are in between When the establishment of a session fails due to the unavailability of the resources of the downstream network element device, there is no corresponding processing procedure in the prior art to ensure that a session can be established between the two network element devices, even if the subsequent downstream network element device resources are available, Because the connection establishment process is unidirectional, as long as the upstream network element device does not re- A request is made to the downstream network element device, and the session between the two network element devices cannot be established.
  • the method for establishing a session in the prior art MBMS is not It is very reliable.
  • the GGSN sends the "MBMS Session Start Request" message to the SGSN
  • the SGSN returns to the GGSN the "MBMS Session Start Response" indicates that the session establishment fails due to resource unavailability, there is no corresponding processing flow in the prior art.
  • the session between the GGSN and the SGSN may not be established at all times, which will cause the users in the corresponding SGSN service area to fail to receive the MBMS session.
  • similar problems exist between the BM-SC and the GGSN, and between the SGSN and the BSC/RNC.
  • the technical problem to be solved by the embodiments of the present invention is to provide a method and a network system for establishing a session in a multimedia broadcast multicast service, which can reliably establish a session in a multimedia broadcast multicast service.
  • the embodiment of the present invention provides a method for establishing a session in a multimedia broadcast multicast service, including: sending a request message for establishing a session to a receiving end; Receiving a response message returned by the receiving end; if the returned response message indicates that the establishment of the session fails due to resource unavailability, the transmitting end resends the request message for establishing a session to the receiving end; or The response message indicates that the establishment of the session fails, and subsequently receives the notification message indicating that the resource is available to the receiving end, and then re-sends the request message for establishing the session to the receiving end.
  • the embodiment of the present invention provides a multimedia broadcast multicast service network system, including a first network element device and a second network element device: the first network element device is configured to send a request message for establishing a session, and receive the second The response message returned by the network element device, if the returned response message indicates that the establishment of the session fails due to the resource being unavailable, resending the request message for establishing the session; or if the returned response message indicates that the establishment of the session fails, and subsequent reception And sending, to the second network element device, a request message for establishing a session, to the second network element device, where the second network element device is configured to receive the first network element device. After the sent request message for establishing the session, the response message is returned to the first network element device.
  • An embodiment of the present invention provides a network element device, including: a transceiver unit, configured to receive a request message for establishing a session; and a detecting unit, configured to detect, after the receiving and receiving unit receives a request message for establishing a session, whether the available resource is included; a unit, configured to record when the detecting unit detects that no resources are available Establishing the service information of the session failure, notifying the transceiver unit to send a response message indicating that the session is failed due to the resource being unavailable, and sending a notification message indicating that the resource is available when the detecting unit detects that the resource is available.
  • the embodiment of the present invention provides a network element device, including: a transceiver unit, configured to send a request message for establishing a session, and receive a returned response message; and a retransmission unit, where the response message received by the transceiver unit indicates that the resource is unavailable After the failure to establish a session, or the response message received at the transceiver unit indicates that the establishment of the session has failed, and subsequently receives a notification message indicating that the resource is available, the request message for establishing the session is resent.
  • the method for establishing a session in the MBMS in the prior art is not very reliable. After one network element device sends a request message to another network element device, if the session fails due to resource unavailability, The corresponding processing procedure may result in a series of problems.
  • the technical solution of the embodiment of the present invention is: in a session start session of a broadcast or multicast service, the sending end sends a request message for establishing a session to the receiving end; Receiving a response message returned by the receiving end; if the returned response message indicates that the establishment of the session fails due to resource unavailability, the transmitting end resends the request message for establishing a session to the receiving end.
  • the upstream network element device learns that the establishment of the session fails because the resources of the downstream network element device are unavailable, even if the downstream network element device does not know when the resource is available, it is re-established to the downstream network element device.
  • the session request message can ensure that if the downstream network element device has resources available, the two network element devices can establish a session again, so that users in the corresponding network element device area can enjoy the MBMS service. Therefore, the technical solution of the embodiment of the present invention implements a reliable establishment of a session in the MBMS, and avoids a series of problems caused by the corresponding processing flow after the failure of establishing a session in the prior art.
  • FIG. 1 is a flowchart of a method for establishing a session according to an embodiment of the present invention
  • FIG. 2 is a flowchart of a reliable setup session between a GGSN and an SGSN according to an embodiment of the present invention
  • FIG. 3 is a flowchart of a reliable setup session between a GGSN and an SGSN according to Embodiment 2 of the present invention
  • FIG. 4 is a third embodiment of the present invention.
  • FIG. 5 is a schematic diagram of a format of a message message of an MBMS resource available notification according to an embodiment of the present invention
  • FIG. 6 is a flowchart of a reliable establishment session between a BM-SC and a GGSN according to an embodiment of the present invention
  • FIG. 7 is a schematic structural diagram of a multimedia broadcast multicast service MBMS network system according to an embodiment of the present invention.
  • the embodiment of the invention provides a method for establishing a session in a multimedia broadcast multicast service, which can reliably establish a session in a multimedia broadcast multicast service.
  • Step 401 Send a request message for establishing a session
  • the sending end sends a request message for establishing a session to the receiving end, requesting to establish a session.
  • Step 402 Receive a returned response message.
  • the receiving end After receiving the request message for establishing a session sent by the sending end, the receiving end returns a response message to the sending end according to the availability of the resource, and the sending end receives the returned response message.
  • Step 403 If the returned response message indicates that the establishment of the session fails, the request message for establishing the session is resent.
  • the sending end When the sending end receives the returned response message indicating that the establishment of the session fails due to resource unavailability, the sending end resends the request message for establishing the session to the receiving end; or if the returned response message indicates that the establishment of the session fails, and subsequent reception And when the receiving end indicates a notification message that the resource is available, the request message for establishing the session is resent to the receiving end.
  • the request message for resending the establishment session may be continuously resent at a set time interval until the session is successfully established, or may be continuously resent within a maximum number of retransmissions that are not exceeded, or may be considered simultaneously. The interval of resend and the number of retransmissions.
  • FIG. 2 it is a reliable process of establishing a session between a GGSN and an SGSN according to an embodiment of the present invention, which includes the following steps:
  • Step 501 The BM-SC sends a "Session Start Request" message to the GGSN.
  • the BM-SC sends a "Session Start Request" message to the GGSN indicating the data transmission to be started and the related attributes of the session.
  • the related attributes of the session include: TMGI, QoS, MBMS service area, session ID, estimated session duration, Broadcast/multicast indication, SGSN list (only for broadcast mode), data transmission time, 2G/3G indication, etc.
  • Step 502 The GGSN returns a "Session Start Response" message to the BM-SC.
  • the GGSN After receiving the "Session Start Request” message, the GGSN establishes the MBMS bearer context, stores the relevant attributes of the session and the associated SGSN identity, and returns "Session Start” to the BM-SC. Response”message;
  • Step 503 The GGSN sends an "MBMS Session Start Request" message to each SGSN.
  • the GGSN sends an "MBMS Session Start Request" message to the relevant SGSNs according to the indication of the BM-SC, and notifies the relevant attributes of the SGSN session, including TMGI, QoS, MBMS service area, session ID, estimated session duration, broadcast/multicast. Indication, time of data transmission, 2G/3G indication, etc.
  • Step 504 The SGSN returns an "MBMS Session Start Response" message to the GGSN, indicating that the session creation fails;
  • the SGSN After receiving the "MBMS Session Start Request" message sent by the GGSN, the SGSN cannot establish an MBMS bearer context because the resource is unavailable, and sends an "MBMS Session Start Response” message to the GGSN, indicating that the session creation fails.
  • the reason value is "The SGSN has no resources available.” ".
  • Step 505 The GGSN resends the "MBMS Session Start Request" message to the SGSN according to the set time interval.
  • the GGSN receives the "MBMS Session Start" returned from the SGSN indicating that the session creation failed.
  • the message "MBMS Session Start Request" is resent to the SGSN for a while, waiting for the SGSN to have available resources.
  • the GGSN If the GGSN returns a "MBMS Session Start Response" message to the SGSN and the SGSN returns a "MBMS Session Start Response” message indicating that the session creation failed, the GGSN continues to resend after a delay. In this way, when the SGSN is available, the GGSN and the SGSN can establish an MBMS session. This prevents the SGSN from returning to the GGSN in the "MBMS Session Start Response" in the prior art. The adverse consequences of coming.
  • the interval at which the GGSN resends the "MBMS Session Start Request" message can be configured according to the network conditions.
  • Step 506 The SGSN returns an "MBMS Session Start Response" message to the GGSN to indicate that the session is successfully created.
  • the SGSN After receiving the "MBMS Session Start Request" message resent by the GGSN, the SGSN establishes an MBMS bearer context and stores the session-related attributes to the GGSN. Returns a "MBMS Session Start Response" message indicating that the session was created successfully.
  • FIG. 3 it is a reliable flow diagram of establishing a session between the GGSN and the SGSN according to Embodiment 2 of the present invention.
  • the main difference between the second embodiment and the first embodiment is that the GGSN resends the "MBMS Session Start Request" message to the SGSN by the set number of times.
  • the figure includes the following steps:
  • Step 601 The BM-SC sends a "Session Start Request" message to the GGSN.
  • the BM-SC sends a "Session Start Request" message to the GGSN indicating the data transmission to be started and the related attributes of the session.
  • the related attributes of the session include: TMGI, QoS, MBMS service area, session ID, estimated session duration, Broadcast/multicast indication, SGSN list (only for broadcast mode), data transmission time, 2G/3G indication, etc.
  • Step 602 The GGSN returns a "Session Start Response" message to the BM-SC.
  • the GGSN After receiving the "Session Start Request" message, the GGSN establishes the MBMS bearer context, stores the relevant attributes of the session and the associated SGSN identifier, and returns "Session Start" to the BM-SC.
  • Step 603 The GGSN sends an "MBMS Session Start Request" message to each SGSN.
  • the GGSN sends an "MBMS Session Start Request" message to the relevant SGSNs according to the indication of the BM-SC, and notifies the relevant attributes of the SGSN session, including TMGI, QoS, MBMS service area, session ID, estimated session duration, broadcast/multicast. Indication, time of data transmission, 2G/3G indication, etc.
  • Step 604 The SGSN returns an "MBMS Session Start Response" message to the GGSN, indicating that the session creation fails.
  • the SGSN After receiving the "MBMS Session Start Request" message sent by the GGSN, the SGSN cannot establish an MBMS bearer context because the resource is unavailable, and sends an "MBMS Session Start Response” message to the GGSN, indicating that the session creation fails.
  • the reason value is "The SGSN has no resources available.” ".
  • Step 605 The GGSN resends the "MBMS Session" to the SGSN according to the set number of retransmissions.
  • the GGSN After receiving the "MBMS Session Start Response" message returned from the SGSN indicating that the session creation failed, the GGSN resends the "MBMS Session Start Request” message to the SGSN to wait for the SGSN to have available resources. If the GGSN resends the "MBMS Session Start Request” message to the SGSN, the SGSN still returns an "MBMS Session Start Response” message indicating that the session creation failed, and the GGSN continues to resend again. In this way, when the SGSN is available, the GGSN and the SGSN can establish an MBMS session. This prevents the SGSN from returning to the GGSN in the "MBMS Session Start Response" in the prior art. The adverse consequences of coming.
  • the SGSN may indeed be unable to establish an MBMS session in some cases, if the MBMS session establishment request is repeatedly sent to the SGSN repeatedly, the signaling load of the network will be increased, so the GGSN repeatedly sends the "MBMS Session Start Request" message to the SGSN.
  • the number of times can be configured, that is, set a maximum number of retransmissions.
  • Step 606 The SGSN returns an "MBMS Session Start Response" message to the GGSN to indicate that the session is successfully created.
  • the SGSN After receiving the "MBMS Session Start Request" message resent by the GGSN, the SGSN establishes an MBMS bearer context, stores the session-related attributes, and returns a "MBMS Session Start Response" message to the GGSN, indicating that the session is created successfully.
  • the time interval of resending the "MBMS Session Start Request” message and the number of retransmissions may be considered at the same time, that is, each time the GGSN receives the "MBMS Session Start Response" message indicating that the session creation failed.
  • the "MBMS Session Start Request” message is resent to the SGSN at a pre-configured time interval, and the number of retransmissions does not exceed the pre-configured maximum number of retransmissions.
  • FIG. 4 it is a reliable flow diagram of establishing a session between the GGSN and the SGSN according to Embodiment 3 of the present invention.
  • the difference between the embodiment 3 and the first embodiment and the second embodiment is that the SGSN returns a "MBMS Session Start Response" message indicating that the session creation fails after the SGSN returns to the GGSN, and if the subsequent discovery finds that a resource is available, the GGSN is actively notified, and the GGSN receives the notification. Then resend the "MBMS Session Start Request" message.
  • the figure includes the following steps:
  • Step 701 The BM-SC sends a "Session Start Request" message to the GGSN.
  • the BM-SC sends a "Session Start Request" message to the GGSN indicating the data transmission to be started and the related attributes of the session.
  • the related attributes of the session include: TMGI, QoS, MBMS service area, session ID, estimated session duration, Broadcast/multicast indication, SGSN list (only for wide Broadcast mode), data transmission time, 2G/3G indication, etc.
  • Step 702 The GGSN returns a "Session Start Response" message to the BM-SC.
  • the GGSN After receiving the "Session Start Request" message, the GGSN establishes an MBMS bearer context, stores the relevant attributes of the session and the associated SGSN identifier, and returns a "Session Start Response" message to the BM-SC;
  • Step 703 The GGSN sends an "MBMS Session Start Request" message to each SGSN.
  • the GGSN sends an "MBMS Session Start Request" message to the relevant SGSNs according to the indication of the BM-SC, and notifies the relevant attributes of the SGSN session, including TMGI, QoS, MBMS service area, session ID, estimated session duration, broadcast/multicast. Indication, time of data transmission, 2G/3G indication, etc.
  • Step 704 The SGSN returns an "MBMS Session Start Response" message to the GGSN, indicating that the session creation fails.
  • the SGSN After receiving the "MBMS Session Start Request" message sent by the GGSN, the SGSN cannot establish an MBMS bearer context because the resource is unavailable, and sends an "MBMS Session Start Response” message to the GGSN, indicating that the session creation fails.
  • the reason value is "The SGSN has no resources available.” ".
  • Step 705 After the SGSN fails to create a session, record the corresponding GGSN address and session information.
  • the "MBMS Resource Available Notification" message is a newly defined message for the SGSN to notify the GGSN that resources are available.
  • the "MBMS Resource Available Notification" message includes the cell End User Address and the Access Point Name. These two cells are mandatory and together identify the corresponding MBMS. Carrying business.
  • Step 707 The GGSN resends the "MBMS Session Start Request" message to the SGSN. After receiving the notification message, the GGSN knows that the SGSN has resources available and resends to the SGSN.
  • Step 708 The SGSN returns an "MBMS Session Start Response" message to the GGSN to indicate that the session is successfully created.
  • the SGSN After receiving the "MBMS Session Start Request" message resent by the GGSN, the SGSN establishes an MBMS bearer context, stores the session-related attributes, and returns a "MBMS Session Start Response" message to the GGSN, indicating that the session is created successfully.
  • the foregoing embodiment is an example of a reliable session establishment process between the GGSN and the SGSN, but is not limited thereto.
  • the method can be extended to between the BM-SC and the GGSN, and the SGSN and the BSC/RNC. The principle of establishing a reliable session is the same.
  • FIG. 6 is a flowchart of establishing a reliable session between the BM-SC and the GGSN according to Embodiment 4 of the present invention, and the steps include:
  • Step 901 The BM-SC sends a "Session Start Request" message to the GGSN.
  • the BM-SC sends a "Session Start Request" message to the GGSN indicating the data transmission to be started and the related attributes of the session.
  • the related attributes of the session include: TMGI, QoS, MBMS service area, session ID, estimated session duration, Broadcast/multicast indication, SGSN list (only for broadcast mode), data transmission time, 2G/3G indication, etc.
  • Step 902 The GGSN returns a "Session Start Response" message to the BM-SC indicating that the session creation fails;
  • the GGSN After receiving the "Session Start Request” message, the GGSN cannot establish the MBMS bearer context because the resource is unavailable, and returns a "Session Start Response” message to the BM-SC, indicating that the session creation failed, and the reason value is "The GGSN has no resources available.”
  • Step 903 The BM-SC resends the "Session Start Request" message to the GGSN.
  • the BM-SC resends the "Session Start Request" message to the GGSN, which may be continuously resent at the set time interval until the session is successfully established with the GGSN, or may be continuously resent within the maximum number of retransmissions that are not exceeded. It is also possible to consider the time interval of resending and the number of retransmissions.
  • the GGSN may return a "Session Start Response" message to the BM-SC, indicating that after the session creation fails, if the subsequent discovery finds that a resource is available, the BM-SC is actively notified, and the BM-SC receives the notification and resends the "Session Start Request". "Message. Step 904: The GGSN returns a "Session Start Response" message to the BM-SC indicating that the session is successfully created.
  • the GGSN if a resource is available, after receiving the "Session Start Request" message retransmitted by the BM-SC, establishes an MBMS bearer context, stores the relevant attributes of the session and the associated SGSN, and returns a "Session Start Response" message to the BM-SC indicating The session was created successfully.
  • the GGSN and the BM-SC can establish a session. This prevents the GGSN from returning a "Session Start Response" message to the BM-SC in the prior art, indicating that there is no corresponding processing flow when the session is created. When the GGSN has resources available subsequently, it can no longer establish a session with the BM-SC.
  • the principle of establishing a reliable session with the GGSN and the SGSN and between the BM-SC and the GGSN is the same, and will not be described in detail herein.
  • the embodiment of the present invention further provides a multimedia broadcast multicast service MBMS network system.
  • FIG. 7 is a schematic diagram of a structure of a multimedia broadcast multicast service MBMS network system according to an embodiment of the present invention.
  • the MBMS network system includes a first network element device 101 and a second network element device 102.
  • the first network element device 101 is configured to send a request message for establishing a session during a session start of a broadcast or multicast service, and receive a returned response message; if the returned response message indicates that the session is failed due to resource unavailability , then resend the request message to establish a session.
  • the second network element device 102 is configured to: after receiving the request message for establishing a session sent by the first network element device 101, return a response message to the first network element device 101.
  • the first network element device 101 includes: a transceiver unit 1011 and a retransmission unit 1012.
  • the transceiver unit 1011 is configured to send a request message for establishing a session during a session start of a broadcast or multicast service, and receive a returned response message;
  • the resending unit 1012 is configured to: after the response message received by the transceiver unit 1011 indicates that the session fails due to resource unavailability, resend at a set time interval and/or within a maximum number of retransmissions that are not exceeded. Establish a request message for the session.
  • the second network element device 102 includes: a transceiver unit 1021, a detecting unit 1022, and a processing unit 1023.
  • the transceiver unit 1021 is configured to receive a request message for establishing a session sent by the first network element device 101, and return a response message to the first network element device 101.
  • the detecting unit 1022 is configured to detect, after the transceiver unit 1021 receives the request message for establishing a session sent by the first network element device 101, whether the available resource is included.
  • the processing unit 1023 is configured to: when the detecting unit 1022 detects that no resource is available, record the service information that fails to establish the session, and notify the transceiver unit 1021 to return to the first network element device 101 that the session is failed due to resource unavailability.
  • the response message and when the detecting unit 1022 subsequently detects that the resource is available, sends a notification message indicating that the resource is available to the first network element device 101.
  • the transceiver unit 1011 of the first network element device 101 receives the response message returned by the second network element device 102 indicating that the session is failed due to resource unavailability, and subsequently receives the message sent by the second network element device 102.
  • the notification message indicating that the resource is available.
  • the retransmission unit 1012 of the first network element device 101 resends the request message for establishing a session to the second network element device 102 according to the notification message received by the transceiver unit 1011.
  • the first network element device 101 is a GPRS gateway support node GGSN, and the second network element device 102 is a GPRS service support node SGSN; or the first network element device 101 is a broadcast multicast service center BM-SC.
  • the second network element device 102 is a GGSN; or the first network element device 101 is an SGSN, and the second network element device 102 is a base station controller BSC/radio network controller RNC.
  • the first network element device 101 is a GPRS gateway support node GGSN, and when the second network element device 102 is a GPRS service support node SGSN, after the SGSN receives the "MBMS Session Start Request" message sent by the GGSN, because the resource is unavailable, The MBMS bearer context cannot be established, and an "MBMS Session Start Response" message is sent to the GGSN, indicating that the session creation failed, and the reason value is "SGSN has no resources available.”
  • the GGSN receives the "MBMS Session Start Response" message returned from the SGSN indicating that the session creation failed, and then delays for a certain period of time and then at a certain time interval.
  • the "MBMS Session Start Request" message is resent to the SGSN to wait for the SGSN to have available resources.
  • the GGSN continuously retransmits within a maximum number of retransmissions that are not exceeded.
  • the first network element device 101 is a broadcast multicast service center BM-SC.
  • the second network element device 102 is a GGSN
  • the MGSN cannot establish an MBMS bearer because the resource is unavailable.
  • Context returning a "Session Start Response” message to the BM-SC, indicating that the creation of the session failed, the reason value is "The GGSN has no resources available.”
  • the BM-SC receives the "Session Start Response" message returned by the GGSN indicating that the session creation failed, and then resends the Session Start Request message to the GGSN, which may be continuously resent at the set time interval until the session is successfully established with the GGSN. It may be continuously resent within a maximum number of retransmissions that exceeds the set, or it may be a time interval of retransmission and the number of retransmissions.
  • the first network element device 101 is an SGSN
  • the second network element device 102 is a base station controller.
  • the process of establishing a reliable session between the SGSN and the BSC/RNC is the same as the principle of establishing a reliable session between the GGSN and the SGSN, the BM-SC and the GGSN.
  • the method for establishing a session in the MBMS in the prior art is not very reliable. After one network element device sends a request message to another network element device, if the session fails due to resource unavailability, there is no corresponding processing.
  • the process which may bring a series of problems, the technical solution of the embodiment of the present invention is: in the process of starting the session of the broadcast or multicast service, the sending end sends a request message for establishing a session to the receiving end; receiving the receiving end The returned response message; if the returned response message indicates that the establishment of the session fails due to the resource being unavailable, the transmitting end resends the request message for establishing the session to the receiving end.
  • the upstream network element device learns that the establishment of the session fails because the resources of the downstream network element device are unavailable, even if the downstream network element device does not know when the resource is available, it is re-established to the downstream network element device.
  • the request message of the session can ensure that if the downstream network element device has resources available, the two network element devices can establish a session again, so that users in the corresponding network element device area can enjoy the MBMS service. Therefore, the technology of the embodiment of the present invention The solution realizes a reliable establishment of a session in the MBMS, and avoids a series of problems caused by the corresponding processing flow after the failure of establishing a session in the prior art.
  • the message when the request message is resent, the message may be continuously retransmitted at a set time interval until the session is successfully established with the GGSN, or may be continuously retransmitted within a maximum number of retransmissions that are not exceeded. It is also possible to consider the time interval of resending and the number of retransmissions.
  • the request message for establishing a session may be resent after receiving a notification message indicating that the resource is available.
  • the method for establishing a session in the embodiment of the present invention may be applied between the GGSN and the SGSN, or between the BM-SC and the GGSN, or between the SGSN and the BSC/RNC.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • General Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention porte sur un procédé pour établir des sessions dans un service de diffusion/multidiffusion multimédia et un système de réseau de service de diffusion/multidiffusion multimédia, le procédé comprenant les opérations consistant à : envoyer le message de requête pour établir des sessions à l'extrémité réceptrice ; recevoir le message de réponse renvoyé par l'extrémité réceptrice ; si le message de réponse renvoyé indique qu'un échec d'établissement de sessions provoqué par une ressource est inutilisable, le message de requête pour établir des sessions est renvoyé à l'extrémité réceptrice à partir de l'extrémité expéditrice ; ou si le message de réponse renvoyé indique un échec d'établissement de sessions et que le message d'informations indiquant que la ressource est utilisable est reçu ultérieurement, le message de requête pour établir des sessions est renvoyé à l'extrémité réceptrice.
PCT/CN2008/071245 2007-11-28 2008-06-10 Procédé et système de réseau pour établir des sessions dans un service de diffusion/multidiffusion multimédia WO2009067866A1 (fr)

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CN200710168187.6 2007-11-28

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CN101175252B (zh) * 2007-11-28 2010-08-04 华为技术有限公司 多媒体广播组播服务中建立会话的方法和网络系统
KR20120071217A (ko) * 2010-12-22 2012-07-02 한국전자통신연구원 사물통신 서비스를 위한 데이터 전송 방법 및 이를 이용하는 이동통신 시스템
CN102595354A (zh) * 2011-01-18 2012-07-18 中兴通讯股份有限公司 一种短消息重发的方法及系统
CN102625245B (zh) * 2011-01-31 2017-02-08 中兴通讯股份有限公司 Mbms业务广播方法和系统
CN103297420A (zh) * 2013-04-27 2013-09-11 Tcl集团股份有限公司 多屏共享控制的方法、设备及系统
EP3528447B1 (fr) 2016-11-29 2020-11-11 Huawei Technologies Co., Ltd. Procédé et appareil de communication
CN116506872A (zh) * 2020-06-30 2023-07-28 华为技术有限公司 通信方法及装置
CN115550249A (zh) * 2021-06-29 2022-12-30 中兴通讯股份有限公司 基于bfd技术建立会话的方法、装置、网络设备及计算机存储介质

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