WO2009084967A1 - Dispositif et système de réacheminement sélectif - Google Patents
Dispositif et système de réacheminement sélectif Download PDFInfo
- Publication number
- WO2009084967A1 WO2009084967A1 PCT/NO2008/000469 NO2008000469W WO2009084967A1 WO 2009084967 A1 WO2009084967 A1 WO 2009084967A1 NO 2008000469 W NO2008000469 W NO 2008000469W WO 2009084967 A1 WO2009084967 A1 WO 2009084967A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- application
- specific selective
- network
- address
- forwarding device
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/02—Topology update or discovery
- H04L45/033—Topology update or discovery by updating distance vector protocols
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/02—Topology update or discovery
- H04L45/04—Interdomain routing, e.g. hierarchical routing
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/302—Route determination based on requested QoS
- H04L45/306—Route determination based on the nature of the carried application
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L47/00—Traffic control in data switching networks
- H04L47/70—Admission control; Resource allocation
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L61/00—Network arrangements, protocols or services for addressing or naming
- H04L61/09—Mapping addresses
- H04L61/25—Mapping addresses of the same type
- H04L61/2503—Translation of Internet protocol [IP] addresses
- H04L61/256—NAT traversal
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- 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
- H04L65/1101—Session protocols
- H04L65/1104—Session initiation protocol [SIP]
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- 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
- H04L65/60—Network streaming of media packets
- H04L65/65—Network streaming protocols, e.g. real-time transport protocol [RTP] or real-time control protocol [RTCP]
Definitions
- communication equipment (1) that produces data streams is situated at the ends of the network.
- the data are sent from the source endpoint to the destination endpoint using the network system.
- the network system comprises local networks on the source and destination side (13), one or more local Internet Service Providers (ISP, 10) and one or more transport networks (11) as shown in figure 1.
- ISP Internet Service Providers
- Local networks (13) implement secure communication environments typically with private addresses and a firewall toward the rest of the Internet.
- Local Internet service provider networks (10) aggregate a number of local networks and use the transport providers (11) to reach each other.
- the socket is identified by the pentuple of (source address, destination address, source port number, destination port number, protocol type) .
- the packets comprise two parts: a header and a payload.
- the header provides control information, while the payload contains higher-layer
- the header identifies said pentuple.
- the data are forwarded between the forwarding devices (20) ho ⁇ -by-hop using the information in the packet header.
- the network functionality an endpoint and its associated local network components typically implement is related to network addressing, including a) Resolving of symbolic names to network addresses b) Support for traversal of Network Address Translator (NAT) and firewall traversal.
- NAT Network Address Translator
- This simple interface does not allow the endpoint to select the end-to-end network path. Only the destination can be selected, and the network itself chooses the path. Typically, the packet will have to traverse multiple administrative authorities on its path.
- the Internet provides so-called best-effort service to its users. This means the packets are transported from node to node toward their destination. They can be temporarily stored in the transit nodes awaiting available network capacity to continue the journey (buffering) . The nodes are free to discard any packet; this would typically happen if a node receives more packets than it can forward in the moment and its buffering capacity is exceeded. No notification is given to the sender of the packet.
- Remedies that can improve the network quality and availability include establishing private wide area networks, both physical and virtual. Large enterprises may rent or deploy network capacity to connect their locations within the enterprise, but with a significant cost. Furthermore, one can influence the packet path using overlay or peer-to-peer architectures. Overlays and peer-to-peer networks cannot improve the network quality unless the network resources are provided to them with capacity guarantees, which is typically not the case.
- ISPs Internet Service Providers
- VPN Virtual Private Networks
- One model is to provide the infrastructure for temporary data storage (caching) to enhance large-scale one-to-many data streaming. This model conserves bandwidth, but it assumes delay-tolerance and is not suitable for interactive, real-time communications.
- Another network service model is to provide infrastructure with guaranteed bandwidth to customers with geographically diverse office locations together with associated private network maintenance services.
- This service is different from VPNs in that there can be given bandwidth and latency guarantees to the traffic, and the customer need not have maintenance personnel employed.
- the model is however limited to the locations where the provider has physical infrastructure available, and cannot be extended to arbitrary communication peers.
- Border Gateway Protocol Some providers build their business model on extensive Border Gateway Protocol (BGP) peering with locally present ISPs, enhancing the performance of their hosting services. This method improves the network service quality only locally .
- BGP Border Gateway Protocol
- QoS Quality of Service
- DiffServ [RFC2475] is a QoS framework for differentiation between different traffic classes. DiffServ scales well and can be used to provide a better service to a certain segments of the network traffic like VoIP. However, DiffServ provides no hard QoS guarantees, only prioritizing a given traffic type in front of another.
- Network virtualization has recently been proposed as a means of deploying global network services .
- CABO Concurrent Architectures are Better than One
- virtual network links connect virtual routers to deploy a range of concurrent internets.
- the virtual links are implemented using any of many available technologies including MPLS and IP tunneling.
- Virtual routers are running as processes on real routing equipment owned and managed by the infrastructure providers .
- the virtual routers have their integral resources such as output queues and schedulers.
- CABO CABO
- the distinction between the infrastructure providers and the network service providers is a novel concept in CABO and facilitates implementation of custom global network services. These could include secure networks, QoS networks, and networks with different addressing and routing schemes providing yet unknown services.
- CABO also advocates deployment of a signaling system for dynamic establishment of virtual network topologies.
- current business and security models in the Internet do not encourage deployment of CABO since the network operators do not accept third-party access to their critical infrastructure.
- Real-time multimedia conferencing has gained substantial popularity recently, particularly in audio (telephony / Voice over IP) applications.
- a control system based on the Session Initiation Protocol, H.323 or a proprietary protocol (e.g. Skype) establishes a connection between the endpoints.
- the endpoints encode the media (audio, video, text for short messages, etc.) and send them as IP packets.
- FIG. 2 shows a typical state of the art deployment for VoIP and/or video conferencing using SIP or H.323.
- the VoIP/conferencing operator typically operates a control infrastructure (17) with at least a control server (30) and optionally media gateways (22) to facilitate audio communication from IP-based networks (11,13,14) to PSTN (18) .
- the communication is initiated in a terminal connected to a terminal adapter (32) .
- Many terminals include the terminal adapter capabilities inside the terminal, constituting a multimedia terminal, often called a "softphone" if implemented inside a mobile phone / computer.
- the call is signaled from the terminal to the control server (30) using a control protocol (220) .
- This control server is typically a SIP or H.323 proxy, which communicate with the remote terminal and establish a connection.
- the terminals are instructed to use an IP/port address combination for the media communication.
- the media stream (250) takes the default path through the IP network (11,13,14) to the destination terminal, and voice or video communication can begin. If the called party is a terminal on the PSTN network, the control server (30) will direct the call to a suitable media gateway (22) and complete the call over regular PSTN.
- NAT Network Address Translation
- STUN Network Address Translation
- Restricted Cone the NAT IP mapping is only valid with outgoing traffic to the destination
- Port Restricted Cone the same as Restricted Cone, but with IP and port mapping
- Firewalls are used to enforce security in the local network. They typically close majority of network ports and discard packets addressed to these ports.
- NAT and firewalls are widely used. Any device operating in the Internet today must be capable of handling them.
- STUN which is a client-server system where the server answers the clients query by embedding the perceived global address of the client in the payload of its reply.
- TURN server which is a STUN server with additional functionality to forward data packets to a given global IP destination • Application Level Gateway (ITU standard
- the present invention enables the automatic redirection of traffic to a dedicated transport network by means of an application-specific selective data packet forwarding device.
- the device can be integrated in the communication terminal, placed in the local network (CPE) , in equipment in an enterprise DMZ or using a public server.
- the device handles data packets, typically in RTP format, and must be present in the media data path between the communicating peers .
- the novelty of the invention is in that
- AAA Accounting, Authentication, Authorization
- the application-specific selective packet- forwarding device integrates with standard IP networks and standard communication protocols like SIP and H.323.
- Data packet redirection can be either control driven or data driven: o Control-driven where a control protocol such as SIP, H.323 or another control protocol controls the application-specific forwarding device and instructs it which packets to redirect to the dedicated transport network and which packets to forward over the shared Internet.
- a control protocol such as SIP, H.323 or another control protocol controls the application-specific forwarding device and instructs it which packets to redirect to the dedicated transport network and which packets to forward over the shared Internet.
- o Data-driven where the application-specific forwarding device analyzes data packets and decides which packets to redirect to the dedicated transport network and which packets to forward over the shared Internet. - Mapping of the global IP addresses to the dedicated network PoPs and IP addresses. This way the dedicated network can hold the packets as long as it takes to forward them to the PoP nearest to their destination.
- Application-specific packet forwarding devices (31) distinguish between the traffic that should be forwarded over the dedicated transport network (15) and the traffic that should be forwarded over the regular, shared Internet (11) -
- the device comprises a packet filter (60) that classifies the data packets into at least two classes; one for the regular, shared Internet (11) and one for the dedicated transport network (15) .
- the packet header (130) can be changed to reflect the intended transport.
- the packet payload (150) can be transported unaltered.
- the packets selected for forwarding over the dedicated transport network (15) are addressed (102) to a retransmission device (20) within the dedicated network (15) .
- the address of said re-transmission device (20) is determined by a mapping between an address space and the addresses of the re-transmission devices within the transport network.
- Said address space can be the IP address space, or the PSTN E.164 address space, or another address space that contains the network addresses of the call source and destination.
- Said re-transmission device (20) can be an IP router, or a transport relay (33) operating as a SIP or H.323 media proxy.
- Said mapping can be implemented in several ways. It can be based on BGP routing information collected in the transport network from the connected ISPs. It can be based on measurements such as the current network load in the transport network. It can be based on the network distance, i.e., which re-transmission device closest to the destination address, or which re-transmission device closest to the source address.
- control system establishes the session using e.g. SIP as shown in figure 3. It then uses a control interface to instruct the application-specific forwarding device (31) which packets should be forwarded to the dedicated transport network (15) and which need not .
- the communication between the control server (30) and the application-specific forwarding device (31) can be organized as a query-response protocol (200).
- the device (31) can ask the server (30) whether the packet with header field combination (101, 120) should be transported using the dedicated network or not.
- the server (30) can answer with the re-transmission device (20) or transport relay (33) address (102) .
- the endpoint control system (32) can control the application-specific forwarding device based on the user configuration data or a management system data using a specialized protocol (210) as shown in figure 4.
- the application-specific forwarding device in the data path and it monitors all IP data packets it forwards using a packet analyzer (61) as shown in figure 5.
- the packet filter (60) it can select the packets that should be transported over the dedicated network (15) using header analysis or it quantifies the streams by associating the packets to the quantuple of (source address, destination address, source port, application port, protocol) , possibly using wildcards on one or more fields, and forwards long-lasting or voluminous or otherwise selected streams over the dedicated network (15) .
- the system relies on a global dedicated transport network (15) as shown in figure 6, with the following properties:
- the network has multiple Points of Presence (PoP) , located in vicinity of the endpoints operated by the service users.
- PoP Points of Presence
- the PoPs are connected using virtual or real network lines with guaranteed bandwidth (50) leased from the transport providers (12) .
- the first embodiment comprises a dedicated transport network (15) , an application-specific forwarding device (31) and compliant re-transmission devices (20) , as shown in figure 7.
- This embodiment relies on an application-specific forwarding device (31) that selects relevant traffic from the local network (13) and forwards this traffic onto a dedicated transport network (15) via the standard ISP used by the customer (10) .
- the forwarding can be done using IP tunneling or a proxy operation using SIP or H.323.
- the retransmission devices (20) can be implemented as IP routers or as SIP/H.323 media proxies.
- the redirection can also be applied for signaling traffic, but the signaling can also use the regular IP route since it is not latency and bandwidth sensitive.
- Optional control servers (30) may communicate with the application-specific forwarding device to assist in determination of the route selection. Additionally, they can be used for admission control, AAA and directory services .
- each local network can have multiple endpoints, see figure 8. Multiple endpoints can be served by a concentrator typically located in the enterprise DMZ.
- the architecture supports multicast. Multi-party conferences can be arranged by unicast-multicast reflectors [REFLECT] deployed in (20) and native multicast deployed in (15) .
- control server (30) is located in the public IP network, typically close to the dedicated transport network as shown in figure 9.
- One or more transport relays (33) are placed centrally in the dedicated transport network and can serve many users.
- the SIP/H.323 terminals (32) must be configured to always contact the control server (30) as outbound signaling proxy. Signaling path is indicated between the terminals and the proxy (220) .
- the control server maintains a mapping in the transport relay (33) using a control protocol (200).
- the terminal After initial signaling between the terminal (32) and the control server (30) , the terminal is instructed to send the media stream (250) over the dedicated transport network (15) using the transport relay (33) as outbound media proxy.
- the control server rewrites source and destination IP addresses/ports as part of the media redirection, to ensure that a packet redirected to the media proxy will be forwarded on to the original destination.
- Embodiment 3 is similar to embodiment 2, the difference being that the control server (30) does not control the transport relay (33) directly as shown in figure 10. Instead, a modified Interactive Connectivity Establishment [ICE] procedure is used to instruct the transport relay (33) where to send the packets.
- ICE Interactive Connectivity Establishment
- the functionality of the transport relay (33) is similar to that of a TURN server [TURN] .
- the caller endpoint control system (32) is configured to use the transport relay (33) as the outbound media proxy. Thus, it always directs media to the dedicated network.
- the modified Interactive Connectivity Establishment [ICE] procedure is used to avoid sending data between collocated endpoint via the dedicated transport network (15) . This procedure includes two steps: a) The caller endpoint verifies whether the called endpoint has an IP address in the same network segment and that the called endpoint can be contacted. If confirmative, no dedicated network (15) is used. b) Otherwise, the transport relay (33) is used.
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Data Exchanges In Wide-Area Networks (AREA)
Abstract
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1012137.4A GB2468819B (en) | 2008-01-02 | 2008-12-29 | A device and system for selective forwarding |
US12/828,835 US9455924B2 (en) | 2008-01-02 | 2010-07-01 | Device and system for selective forwarding |
US15/248,325 US10263902B2 (en) | 2008-01-02 | 2016-08-26 | Device and system for selective forwarding |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NO20080028A NO20080028L (no) | 2008-01-02 | 2008-01-02 | A Device and System for Media Network Services |
NO20080028 | 2008-01-02 |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/NO2008/000470 Continuation-In-Part WO2009084968A1 (fr) | 2008-01-02 | 2008-12-29 | Dispositif et système de transfert sélectif |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US12/828,835 Continuation-In-Part US9455924B2 (en) | 2008-01-02 | 2010-07-01 | Device and system for selective forwarding |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2009084967A1 true WO2009084967A1 (fr) | 2009-07-09 |
Family
ID=40824532
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/NO2008/000469 WO2009084967A1 (fr) | 2008-01-02 | 2008-12-29 | Dispositif et système de réacheminement sélectif |
Country Status (3)
Country | Link |
---|---|
GB (1) | GB2468819B (fr) |
NO (1) | NO20080028L (fr) |
WO (1) | WO2009084967A1 (fr) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2485148A (en) * | 2010-11-01 | 2012-05-09 | Media Network Services As | Network routing with load balancing |
WO2013140141A1 (fr) | 2012-03-20 | 2013-09-26 | Media Network Services As | Système de distribution de données |
US9838108B2 (en) | 2015-06-18 | 2017-12-05 | International Business Machines Corporation | IP based real-time communications over a mobile network |
US10355973B2 (en) | 2012-01-10 | 2019-07-16 | Media Network Services As | Data transport using geographical location |
USRE49392E1 (en) | 2012-10-05 | 2023-01-24 | Aaa Internet Publishing, Inc. | System and method for monitoring network connection quality by executing computer-executable instructions stored on a non-transitory computer-readable medium |
US11606253B2 (en) | 2012-10-05 | 2023-03-14 | Aaa Internet Publishing, Inc. | Method of using a proxy network to normalize online connections by executing computer-executable instructions stored on a non-transitory computer-readable medium |
US11838212B2 (en) | 2012-10-05 | 2023-12-05 | Aaa Internet Publishing Inc. | Method and system for managing, optimizing, and routing internet traffic from a local area network (LAN) to internet based servers |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5732078A (en) * | 1996-01-16 | 1998-03-24 | Bell Communications Research, Inc. | On-demand guaranteed bandwidth service for internet access points using supplemental user-allocatable bandwidth network |
US20030118036A1 (en) * | 2001-12-21 | 2003-06-26 | Mark Gibson | Routing traffic in a communications network |
US20040054810A1 (en) * | 1999-05-10 | 2004-03-18 | The Distribution Systems Research Institute | Integrated IP network |
WO2006043139A1 (fr) * | 2004-10-20 | 2006-04-27 | Nokia Corporation | Modification d'adresse dans des serveurs d'applications |
-
2008
- 2008-01-02 NO NO20080028A patent/NO20080028L/no not_active Application Discontinuation
- 2008-12-29 GB GB1012137.4A patent/GB2468819B/en active Active
- 2008-12-29 WO PCT/NO2008/000469 patent/WO2009084967A1/fr active Application Filing
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5732078A (en) * | 1996-01-16 | 1998-03-24 | Bell Communications Research, Inc. | On-demand guaranteed bandwidth service for internet access points using supplemental user-allocatable bandwidth network |
US20040054810A1 (en) * | 1999-05-10 | 2004-03-18 | The Distribution Systems Research Institute | Integrated IP network |
US20030118036A1 (en) * | 2001-12-21 | 2003-06-26 | Mark Gibson | Routing traffic in a communications network |
WO2006043139A1 (fr) * | 2004-10-20 | 2006-04-27 | Nokia Corporation | Modification d'adresse dans des serveurs d'applications |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2485148A (en) * | 2010-11-01 | 2012-05-09 | Media Network Services As | Network routing with load balancing |
WO2012059749A1 (fr) | 2010-11-01 | 2012-05-10 | Media Network Services As | Services de relais de réseau offrant des garanties de qualité de service |
GB2485148B (en) * | 2010-11-01 | 2016-12-21 | Media Network Services | Network routing |
US10355973B2 (en) | 2012-01-10 | 2019-07-16 | Media Network Services As | Data transport using geographical location |
WO2013140141A1 (fr) | 2012-03-20 | 2013-09-26 | Media Network Services As | Système de distribution de données |
US9426420B2 (en) | 2012-03-20 | 2016-08-23 | Media Networks Services As | Data distribution system |
USRE49392E1 (en) | 2012-10-05 | 2023-01-24 | Aaa Internet Publishing, Inc. | System and method for monitoring network connection quality by executing computer-executable instructions stored on a non-transitory computer-readable medium |
US11606253B2 (en) | 2012-10-05 | 2023-03-14 | Aaa Internet Publishing, Inc. | Method of using a proxy network to normalize online connections by executing computer-executable instructions stored on a non-transitory computer-readable medium |
US11838212B2 (en) | 2012-10-05 | 2023-12-05 | Aaa Internet Publishing Inc. | Method and system for managing, optimizing, and routing internet traffic from a local area network (LAN) to internet based servers |
US9838108B2 (en) | 2015-06-18 | 2017-12-05 | International Business Machines Corporation | IP based real-time communications over a mobile network |
Also Published As
Publication number | Publication date |
---|---|
GB201012137D0 (en) | 2010-09-01 |
GB2468819A (en) | 2010-09-22 |
GB2468819B (en) | 2012-08-08 |
NO20080028L (no) | 2009-07-03 |
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