WO2010100311A1 - Dispositivos y método para la admisión y control de recursos en entornos multidominio - Google Patents
Dispositivos y método para la admisión y control de recursos en entornos multidominio Download PDFInfo
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- WO2010100311A1 WO2010100311A1 PCT/ES2010/070123 ES2010070123W WO2010100311A1 WO 2010100311 A1 WO2010100311 A1 WO 2010100311A1 ES 2010070123 W ES2010070123 W ES 2010070123W WO 2010100311 A1 WO2010100311 A1 WO 2010100311A1
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L47/00—Traffic control in data switching networks
- H04L47/10—Flow control; Congestion control
Definitions
- the present invention relates, in general, to the management of resources to ensure the quality of service in telecommunication networks and more particularly to the management of resources in New Generation Networks.
- control planes set of systems responsible for manage the physical resources of an NGN network
- ETSI / TISPAN RACSs Resource and Admission Control Sub-System, Resource Management and Admission Subsystem
- ITU- T RACFs Resource and Admission Control Functions
- end-to-end QoS solutions is also being studied making use of the functionalities available at the service or application level.
- provision of end-to-end QoS is being studied using the IMS core [IP Multimedia Subsystem, IP Multimedia Subsystem) to coordinate the configuration of resources in the networks of access.
- IMS core IP Multimedia Subsystem, IP Multimedia Subsystem
- SIP Session Initiation Protocol
- the major drawback of this approach is that it would be essential to use the SIP (Session Initiation Protocol) protocol at the application level, that is, not only on the operator's servers but also on the client's applications; Which would be a limitation of the solution, since it could not be used in the provision of services with guaranteed QoS whose signaling is not based on SIP. If a new application / service is developed that requires specific network features in a multi-domain environment and cannot use SIP, the network administrator would have to redefine and implement the interactions between the interdomain servers.
- SIP Session Initiation Protocol
- devices and a method that extend the capabilities of the control plane of a telecommunication network are proposed, such as the NGN network, allowing the reservation and configuration of network resources with other networks of the same type. to provision guaranteed QoS in multi-domain environments that also contemplate the home network of the end user.
- This control plane may be used by any service or application plane, including the IMS itself or any other service platform of the network operator. This allows convergent network operators the use of this control plane with any of their service platforms.
- the present invention is implemented in the QoS provision modules in NGN ETSI / TISPAN RACS and ITU- environments.
- T RACF that allows the provision of QoS in a feasible way in multidomain environments and in the particular case of a residential gateway, the element responsible for managing the resources of the home network. It also includes the implementation of the interfaces between the QoS provision modules, the functionalities associated with them and the optimization in time of the negotiation between the different devices arranged in the different networks.
- Another aspect of the invention is a computer program, which is stored in at least one support readable by a computer and comprising code means adapted to execute the described method, when said program is executed in a computer.
- Figure 1. Shows multiple telecommunication networks in a multidomain environment.
- Figure 2.- Shows the ITU-T NGN architecture.
- Figure 3. Shows the ETSI / TISPAN NGN architecture.
- Figure 4. Shows the interaction between domains when the source domain manages the source IP address.
- Figure 5. Shows the interaction between domains when the source domain does not manage the source IP address.
- Figure 6. Shows a simplified interaction diagram between two domains.
- Figure 7. Shows a simplified interaction diagram between three domains.
- FIG. 1 shows an example of a multidomain environment, which includes multiple telecommunication networks, in which the present invention can be implemented. Only the elements necessary to understand the present invention are shown.
- the multidomain environment comprises several domains (which consist, for example, of New Generation Networks NGN networks), which generally, although not necessarily from different operators.
- the figure shows the architecture of the NGN networks in two domains, domain A 100 and domain B 200, as well as the particular case of the residential gateway 400.
- the NGN networks basically comprise the following three functions : 110,210 service plane functions, a device (also referred to as a module) for admission and control of resources in new generation networks 120,220 and functions of the 130,230 transport plane.
- the admission and control module may be the RACS (Resource and Admission Control Sub-System, Resource Management and Admission Subsystem) of the ETSI / TISPAN architecture or the RACF (Resource and Admission Control Function, Resource Management and Admission Function ) of the ITU-T NGN architecture.
- the interface 500 between admission modules and resource control is specified in a multi-domain environment (which is called the Ri interface in the ITU-T NGN and Ri 'architecture in the ETSI / TISPAN NGN architecture) and the interface 600 between the module for admission and control of resources and the residential gateway (Rpr interface), which is considered as an extension of the control plane.
- Figures 2 and 3 detail the main functions and interfaces of the architectures defined in ITU-T and in ETSI / TISPAN.
- the devices (modules) responsible for admission control and resource reservation are RACF 1200 (in the case of ITU-T NGN) and RACS 1210 (in the case of ETSI / TISPAN).
- each of these modules consists of the following submodules:
- the ITU-T PD-FE (Policy Decision Functional Entity) 1220 and the ETSI / TISPAN SPDF ⁇ Service-based Policy Decision Function) 1230 are the independent modules of the underlying technology and are responsible for providing a common interface to the service plane or application. They are also responsible for configuring all those computers that are common to different network technologies (such as edge routers, for example).
- the ITU-T TRC-FE (Transport Resource Control Functional Entity) 1240 and the ETSI / TISPAN x-RACF (Generic Resource and Admission Control Function) 1250 are the modules dependent on the underlying network technology and are responsible for configuring the specific functions in the transport plane.
- interfaces and functionalities such as those implemented by the ITU-T NACF Network Attachment Control Function) or ETSI / TISPAN NASS ⁇ Network Attachment Subsystem) module that is responsible for maintaining the user authorization information, maintaining information about its location, etc.
- ITU-T NACF Network Attachment Control Function or ETSI / TISPAN NASS ⁇ Network Attachment Subsystem
- the Ri / Ri '500 interface is the interface in charge of the synchronization of the admission control and resource reservation processes between several domains. Therefore, the following requirements are essential:
- the interface must allow the SPDF of the initial domain to require the reservation and configuration of resources in the domains through which the session will take place.
- the interface must allow interaction between the control planes of different operators without compromising their security and privacy. This implies that information regarding the intra-domain topology or mechanisms of each of the operators cannot be exchanged. Although this interface is identified in the standards, today there is no specification and / or implementation of it. In this description an implementation of the same is presented.
- Resource & AdmisionControl request ⁇ 720 request for resources and admission control
- 720 used to ask the next SPDF to reserve and configure the necessary resources.
- Relay request ⁇ release request 800 used to release the allocated resources.
- Modify request ⁇ modify request 760 to modify previously allocated resources
- Resource & AdmissionControllnitiation request (request for initiation of resources and admission control) 830: this primitive is necessary to ask the final domain to begin the reservation of resources. It is used when resources have to be reserved in the initial domain for a flow whose source IP does not belong to the domain. This primitive is necessary if the transit domains are not the same in one direction and another of the communication. This function is optional but necessary to manage inter-domain links of transit domains.
- Releaselnititiation request requests the domain that manages the source IP of the flow to release resources. This function is optional but necessary to manage inter-domain links of transit domains.
- Modifylnititation request request the domain that manages the IP Origin of the flow Ia modification of the reserved resources. This function is optional but necessary to manage inter-domain links of transit domains.
- Resource & Admision Control response (resource response and admission control) 730: the destination domain informs about the result of its admission operation and resource configuration.
- Relay response (release response) 810 response to the request for release of resources.
- Modify response (modification response) 770 response to the request to modify previously allocated resources
- Resource & AdmissionControllnitiation response 840 response to the request Resource & AdmissionControllnitiation request. This function is optional but necessary to manage inter-domain links of transit domains.
- Releaselnititiation response response to the Releaselnitiation request.
- This function is optional but necessary to manage inter-domain links of transit domains.
- Modifylnititation response response to the Modifylnitiation request. This function is optional but necessary to manage inter-domain links of transit domains.
- - Service Class information of the kind of service required.
- - Flow (s) description information on the flows (connections) (source IP, destination IP, source and / or destination ports and protocol)
- Figures 4-5 show the negotiation sequence in two different scenarios.
- Figure 4 shows the use of these primitives in a scenario in which they are reserved (use of the Resource & Admision Control request and Resource & Admision Control responsive primitives), modify (use of the Modify request and Modify response primitives) and release resources (use of the Relay primitives request and Relay response) for a connection with a third domain 300, taking into account the requests received by the admission and resource control module 120 of the first domain 100 of the functions of the service plane 110.
- module 120 receives a Resourcelnitiation Request 710 from service plane 110, it reserves and configures the necessary resources for the connection and sends a Resource & Admission Control request 720 to the admission and resource control module 220 of the second domain 200. It also reserves and configures the necessary resources and sends the Resource & Admission Control Request 720 to the admission and control module 320 of the third domain 300. This module also reserves and configures the necessary resources and being the admission and control module of the last domain 300 in the chain , sends a Resource & Admission Control response 730 response to the admission and resource control module 220 of the second domain 200, which passes to the admission and resource control module 120 of the first domain 100. This module sends a Resourcelnitation Response 740 response to the service plane 110.
- module 120 receives a ResourceModification Request 750 from the service plane 110, it modifies the resources necessary for the connection and sends a Modil and request 760 to the admission and resource control module 220 of the second domain 200. It also modifies the necessary resources and sends the Modify request 760 to the admission and resource control module 320 of the third domain 300. This module also modifies the necessary resources and being the admission and control module of the last domain 300 in the chain, sends a Modify response response 770 to the admission and resource control module 220 of the second domain 200, which passes to the admission and resource control module 120 of the first domain 100. This module sends a ResourceModification Response 780 response to the service plane 110.
- the module 120 receives a ResourceRelease Request 790 from the service plane 110, it releases the resources of the connection and sends a Relay request 800 to the admission and resource control module 220 of the second domain 200. It also releases the resources and sends the Relay request 800 to the admission and resource control module 320 of the third domain 300. This module also releases the resources and being the admission and resource control module of the last domain 300 in the chain, sends a Relay response 810 response to the module of admission and control of resources 220 of the second domain 200, which passes to the module of admission and control of resources 120 of the first domain 100. This module sends a ResourceRelease Response 820 response to the service plane 110.
- Figure 5 shows the use of the primitives previously qualified as optional that allow the domain that manages the source IP to manage the reserve of resources associated with said connection and send the result of this operation to the domain that received the application plane request.
- This functionality is optional and would be required when the traffic domains are different in one direction and another from the communication.
- the Resource & AdmissionControllnitiation request / response primitives are used,
- the module 120 of the first domain 100 receives a Resourcelnitiation Request 710 from the service plane 1 10 and does not manage the source IP address of the connection, it sends a Resource & AdmissionControllnitiation request 830 to the resource admission and control module 220 of the second domain 200.
- the situation that the first domain does not manage the originating IP address of the connection occurs for example in the following case: different flows (different connections) may be required for the same application, from the client to the server and from the server to the client. Only one domain requests from the service part reserve for all these flows, and therefore it may be necessary to contemplate this case.
- the second domain 200 passes the request 830 to the module for admission and control of resources 320 of the third domain 300.
- the procedure for reserving and configuring the necessary resources begins previously described with reference to Figure 4, sending a ResourceAdmission Control Request 720 to the admission and resource control module 220 of the second domain 200.
- This procedure ends with the sending of a Resource Admission Control response of the admission and control module of resources. 220 of the second domain 200 to the admission and resource control module 320 of the third domain 300. It sends a Resource & AdmissionControllnitiation response 840 to the admission and resource control module 220 of the second domain 200, which passes it to the admission and control module of resources 120 of the first domain 100.
- This module sends a Resourcelnitation Response 740 response the service plan 1 10.
- the BGP ⁇ Border Gateway Protocol routing information available in all domains (either on the edge routers or in the route reflectors), is used, in order to find the next path domain (available for each destination IP in the AS Path field or path of autonomous systems or domains).
- This information is combined with a DNS-based resolution (Domain ⁇ ame System) to obtain the pointer (address of the system in charge of managing resources in the next domain) to which to send requests for a given domain.
- the SPDF applies an admission control algorithm, that is, computes a mathematical function or evaluates the user's profile and resource configuration, in which SPDF 1230 interacts with the x-RACF 1250, module dependent on the underlying network technology, so that it configures the transport plane resources
- the interaction between domains is based on two phases to parallelize the configuration of resources in the different domains.
- the process of configuring resources in the transport plane is the most expensive in time, of the order of hundreds of milliseconds to even seconds, depending on the underlying technology.
- the reserve of resources through the application of an admission control algorithm is of the order of 1 -10 milliseconds. Therefore, a solution that sequences the resource configuration processes in all traversed domains would introduce high response latencies to the end user.
- Figure 6 shows in a simplified way the paralysis of the configuration when there are two domains involved.
- the arrival of a new request Resourcelnitiation Request 710 in the admission and control module of the initial domain triggers the following processes:
- Process 900 The admission and control module 120 of the initial domain 100 checks the type of request and applies an admission control algorithm (resource reservation) to verify that new resources can be admitted after consulting the NACF or NASS. Once the connection is admitted, a request for admission and resource control (Resource & AdmissionControl request) 720 is sent to the next domain 200 and the process is carried out 910.
- the operations to be carried out in 900 require 1 ms to 10ms and are performed by sub-module SPDF 1230.
- Process 910 The admission and control module of the initial domain 120 proceeds to the configuration of the functions of the transport layer, launching the actions of the x-RACF 1250 that interacts with the transport plane, to effectively apply the necessary policies that guarantee The desired quality. This operation requires the order of 100ms to 1 s.
- Process 920 The admission and control module 220 of the second and last domain 200 receives the request 720 (Resource & Admission Control request). During the period 920, this module checks if there are resources available in the network in this case it proceeds to processes 930. This operation is similar to that described in 900 and therefore requires 1 ms to 10ms and is performed by the SPDF of the second domain 200.
- Process 930 The last domain proceeds to the configuration of the transport plane. Once this task has been successfully completed, it sends a 730 response to the request for resources made by the previous domain (Resource & AdmissionControl response). The configuration process takes from the order of 100ms to 1 s.
- Figure 7 shows a variant of Figure 6 in which the modules interact admission and control of resources from three domains.
- the resource admission and control module 1020 of the transit domain 1000 has verified the availability of resources 940, it forwards the request 720 to the last domain 200. Then, proceed to the 950 configuration of the transport plane.
- the 910,930,950 configuration processes are parallelized, avoiding that the largest component of the response time to the QoS request depends linearly on the number of domains involved, thus reducing the time of establishment of a guaranteed QoS connection.
- the proposed solution allows a telecommunication network operator the provision of services with guaranteed service qualities in a multi-domain environment. For this, the coordination of the mechanisms available in each of the domains must be guaranteed in order to guarantee the provision of end-to-end QoS in the communications that pass through the networks.
- the invention can be implemented with networks of Telecommunications that operate according to standards other than the NGN standard disclosed in this description.
- a computer program may be stored / distributed on a suitable medium, such as an optical storage medium or a solid state medium supplied together with or as part of other hardware, although it may also be distributed in other ways, such as via the Internet or other cable or wireless telecommunication systems. No reference symbol in the claims should be construed as limiting the scope.
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BRPI1009096A BRPI1009096A2 (pt) | 2009-03-06 | 2010-03-05 | dispositivo e método para a admissão e controle de recursos em ambientes multi-domínios. |
EP10748371A EP2405615A1 (en) | 2009-03-06 | 2010-03-05 | Devices and method for the admission and control of resources in multi-domain environments |
MX2011009045A MX2011009045A (es) | 2009-03-06 | 2010-03-05 | Dispositivos y metodo para la admision y control de recursos en entornos multidominio. |
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PCT/ES2010/070123 WO2010100311A1 (es) | 2009-03-06 | 2010-03-05 | Dispositivos y método para la admisión y control de recursos en entornos multidominio |
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AR (1) | AR076092A1 (es) |
BR (1) | BRPI1009096A2 (es) |
CL (1) | CL2011002178A1 (es) |
CO (1) | CO6420384A2 (es) |
MX (1) | MX2011009045A (es) |
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US20070189293A1 (en) * | 2006-02-15 | 2007-08-16 | Fujitsu Limited | QoS guarantee system in multidomain network and QoS server applied to the same |
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2010
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- 2010-03-05 AR ARP100100681A patent/AR076092A1/es unknown
- 2010-03-05 UY UY0001032476A patent/UY32476A/es not_active Application Discontinuation
- 2010-03-05 PE PE2011001565A patent/PE20120728A1/es not_active Application Discontinuation
- 2010-03-05 MX MX2011009045A patent/MX2011009045A/es not_active Application Discontinuation
- 2010-03-05 WO PCT/ES2010/070123 patent/WO2010100311A1/es active Application Filing
- 2010-03-05 BR BRPI1009096A patent/BRPI1009096A2/pt not_active IP Right Cessation
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Patent Citations (1)
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US20070189293A1 (en) * | 2006-02-15 | 2007-08-16 | Fujitsu Limited | QoS guarantee system in multidomain network and QoS server applied to the same |
Non-Patent Citations (2)
Title |
---|
"Bridging the standardization gap to provide OoS in current NGN architectures", IEEE COMMUNICATIONS MAGAZINE, SPECIAL ISSUE ON ''ITU-T INTERNATIONAL STANDARDS IN INFORMATION AND COMMUNICATIONS TECHNOLOGIES, October 2008 (2008-10-01) |
"Innovations in NGN: Future Network and Services, 2008. K-INGN 2008. First ITU-T Kaleidoscope Academic Conference.", ISBN: 978-92-61-124, article M. A. CALLEJO-RODRIGUEZ ET AL.: "EUQOS: END-TO-END QOS OVER HETEROGENEOUS NETWORKS.", pages: 177 - 184., XP031272295 * |
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PE20120728A1 (es) | 2012-07-13 |
UY32476A (es) | 2010-09-30 |
CL2011002178A1 (es) | 2012-01-13 |
EP2405615A1 (en) | 2012-01-11 |
CO6420384A2 (es) | 2012-04-16 |
BRPI1009096A2 (pt) | 2016-03-01 |
MX2011009045A (es) | 2011-09-21 |
AR076092A1 (es) | 2011-05-18 |
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