Seamless session mobility for multimedia streams
A technology of multimedia streaming and session initiation protocol, which is applied in conversational real-time services, computer program products, media network units, and communication network fields, and can solve problems such as session interruption, slow session switching, and installation of expensive new network units.
Active Publication Date: 2007-08-01
ALCATEL LUCENT SAS
View PDF0 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0010] 1) Lack of privacy because the SIP user agent server (UAS, callee) can observe the movement of the moving user agent client (UAC, caller); The means required to detect changes in the delivery environment in 2 are complex; 3) session redirection initiation via the SIP signaling path may take too long, which will result in session interruptions in unacceptably long intervals (time frames)
[0011] Mobile IP technology also has great limitations: 1) All terminals and all local networks and visited networks involved in communication—even dedicated WLANs—must support the required mobile IP standards, which requires the installation of expensive new networks unit
3) In many cases data packets have to be transmitted over the provider's local network
4) Session switching is "slow", so there is no seamless session continuity
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0038] Fig. 1 shows a schematic diagram of a communication network 1 according to the invention. The communication network 1 comprises a local network 2 and a plurality of network domains 3.1-3.3 operatively connected to the local network 2 . In the embodiment of FIG. 1 the connections are illustrated by straight solid lines between the local network 2 and the respective network domains 3.1-3.3. Separate network domains may also be referred to as remote domain 3.1, foreign domain "A" 3.3, and foreign domain "B" 3.2. The first terminal 4 is operatively connected to the domain 3.3. The terminal 4 is designed as a mobile terminal that can freely move (roam) within the communication network 1 . In this way, the mobile terminal 4 can optionally be connected to other network domains of the communication network 1, such as the network domain 3.2, as will be explained in detail below. Further terminal 5 is connected to network domain 3.1. As a non-limiting example, the terminal 5 ...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
A method for seamless handover of a multimedia stream session to a roaming terminal (4). In accordance with the proposed method, a first mediating network element (8.1) is comprised in a communication path to the roaming terminal (4). Said first mediating network element (8.1) first secures a session context of the multimedia stream session for to allow identification of the roaming terminal. Said first mediating network element (8.1) then observes an address change of the roaming terminal on a media overlay level of the multimedia stream session and subsequently redirects the multimedia stream to the new address. Then, alternative mediating network elements (8.2, 8.3) for replacing the first mediating network element (8.1) are determined on a control level of the network (1). In this way, a complete handover of the multimedia stream session is achieved in a seamless way for an end-user owing to a cross-layer approach, while bridging a timeframe between the event of changing the terminal address and an event of having completed re-registration and session redirection on the control level of the network.
Description
technical field [0001] The present invention relates to a method for seamless handover of multimedia streams to roaming terminals, and in particular to conversational real-time services such as Voice over IP (VoIP) or Multimedia over IP (MMoIP) in a Next Generation Network (NGN) system even in But not limited to cross-operator situations. [0002] The invention also relates to an intermediary network unit for providing a multimedia stream to a roaming terminal in a communication network and a mobile terminal used as a roaming terminal in a communication network. [0003] Additionally, the invention relates to a communication network comprising: [0004] - local network; [0005] - a plurality of network domains operatively connected to said local network; [0006] - A plurality of terminals located in different network domains adapted to communicate via the communication network in a multimedia session. [0007] Furthermore, the invention also relates to a computer program...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): H04Q7/38H04L12/56H04L12/28H04L29/06H04W8/26H04W12/00H04W36/00H04W36/18H04W40/00H04W80/04H04W80/10
CPCH04W36/0033H04L65/1016H04L29/06197H04L29/06217H04W40/00H04L65/1006H04L65/80H04L29/06523H04W8/26H04W80/10H04L65/1104H04L65/1095
Inventor K·奥伯尔P·多姆什茨M·托姆苏
Owner ALCATEL LUCENT SAS