WO2008067760A1 - Method and system for distributed architecture for monitoring session liveness - Google Patents

Method and system for distributed architecture for monitoring session liveness Download PDF

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Publication number
WO2008067760A1
WO2008067760A1 PCT/CN2007/071165 CN2007071165W WO2008067760A1 WO 2008067760 A1 WO2008067760 A1 WO 2008067760A1 CN 2007071165 W CN2007071165 W CN 2007071165W WO 2008067760 A1 WO2008067760 A1 WO 2008067760A1
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WO
WIPO (PCT)
Prior art keywords
session
liveness
monitoring according
status
monitoring
Prior art date
Application number
PCT/CN2007/071165
Other languages
French (fr)
Inventor
John Kaippallimalil
Hongyu Li
Ruobin Zheng
Original Assignee
Huawei Technologies Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Huawei Technologies Co., Ltd. filed Critical Huawei Technologies Co., Ltd.
Publication of WO2008067760A1 publication Critical patent/WO2008067760A1/en

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L43/00—Arrangements for monitoring or testing data switching networks
    • H04L43/08—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters
    • H04L43/0805—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters by checking availability
    • H04L43/0811—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters by checking availability by checking connectivity
    • 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
    • H04L61/10—Mapping addresses of different types
    • H04L61/103—Mapping addresses of different types across network layers, e.g. resolution of network layer into physical layer addresses or address resolution protocol [ARP]

Definitions

  • the present invention relates to communication technologies, and more particularly, to a method and a system for distributed monitoring of Internet Protocol (IP) session liveness and centralized control of IP sessions.
  • IP Internet Protocol
  • DSL-Forum is considering proposals for liveness monitoring based on IETF Bidirectional Forwarding Detection (BFD).
  • BFD Bidirectional Forwarding Detection
  • a DSL session is PPP based and status of this session can be monitored based on PPP capabilities.
  • Pure IP based sessions do not have the inherent ability to be monitored.
  • Various mechanisms based on authentication and status of the traffic with respect to that IP address is used to monitor the status of the IP address. From the above, it is seen that an improved technique for IP session monitoring is desired.
  • a system for IP session liveness monitoring including:
  • each of the one or more session monitoring devices is adapted for acquiring status of an IP session at one or more monitored devices and reporting the status of the IP session to the session control device.
  • a method for IP session liveness monitoring including:
  • Figure 1 is a simplified view diagram of a system for monitoring the "liveness" of an IP session according to an embodiment of the present invention
  • FIG. 2 is a simplified view diagram of a method for monitoring in a Routed Residential Gateway (RG) Model of DSL networks according to an embodiment of the present invention
  • FIG. 3 is a simplified view diagram of a method for monitoring in a Bridged RG Model of DSL Networks according to an embodiment of the present invention.
  • FIG. 1 is a simplified view diagram of a system for monitoring the "liveness" of an IP session according to an embodiment of the present invention. This diagram is merely an example, which should not unduly limit the scope of the invention herein. One of the ordinary skilled in the art would recognize other variations, modifications, and alternatives.
  • the IP session Monitoring Function is responsible for monitoring the liveness of IP sessions at the Monitored Hosts (MHs).
  • the MF reports the status to the IP session Control Function (CF).
  • MFs may use multiple means to monitor liveness.
  • an MF could rely on upstream traffic as an indicator of liveness.
  • it may use a polling mechanism such as Address Resolution Protocol (ARP) in the absence of upstream IP traffic.
  • ARP Address Resolution Protocol
  • CF is notified of any change of status using a liveness reporting protocol such as ANCP (H.248, GSMP).
  • ANCP H.248, GSMP
  • a method which includes an ARP that is secured from spoofing attacks by using an authenticated MAC.
  • ARP Data Over Cable Service Interface Specifications
  • WiMAX WiMAX networks
  • DOCSIS Data Over Cable Service Interface Specifications
  • a method is provided for an architecture for DSL networks using standard IEEE specified authenticated MAC (802.1 AR) in combination with ARP for monitoring.
  • DSLAM Digital Subscriber Line Access Multiplexer
  • BNG Broadband Network Gateway
  • FIG. 2 is a simplified view diagram of a method for monitoring in a Routed RG Model of DSL networks according to an embodiment of the present invention.
  • This diagram is merely an example, which should not unduly limit the scope of the invention herein.
  • the devices behind the RG e.g. in a home network
  • the DSL service is offered to the user represented by the RG.
  • the ARP exchange would take place between the RG and DSLAM.
  • ARP in the home network is bounded by the RG (or some firewall in the home network).
  • FIG. 3 is a simplified view diagram of a method for monitoring in a Bridged RG Model of DSL Networks according to an embodiment of the present invention.
  • This diagram is merely an example, which should not unduly limit the scope of the invention herein.
  • One of the ordinary skilled in the art would recognize other -A- variations, modifications, and alternatives.
  • the devices behind the RG are part of IP network of the DSL network provider according to a specific embodiment.
  • the ARP exchange would take place directly between the devices and the DSLAM.
  • a method for distributed IP session monitoring using an ARP message mechanism is provided.
  • the ARP mechanism is present in many IP stacks and has wide spread availability in different devices and operating systems.
  • interoperability related issues are minimized.
  • a method for distributed IP monitoring where a DSLAM closer to the end host monitors the status, while the IP session status can be managed by the controller (BNG).
  • BNG controller
  • the invention has been applied to systems based on secure ARP for a DSL network. But it would be recognized that the invention has a much broader range of applicability.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Environmental & Geological Engineering (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)

Abstract

The present invention discloses a system for IP session liveness monitoring. The method includes one or more session monitoring devices and a session control device, each of the one or more session monitoring devices is adapted for acquiring status of an IP session at one or more monitored devices and reporting the status of the IP session to the session control device. The invention further discloses a method for IP session liveness monitoring which includes: acquiring, from one or more monitored devices, status of an IP session at the one or more monitored devices, and, reporting the status of the IP session to a session control device. The invention enables distributed monitoring of IP session liveness and centralized control of IP sessions, and thus allowing for better scalability.

Description

METHOD AND SYSTEM FOR DISTRIBUTED ARCHITECTURE FOR MONITORING SESSION LIVENESS
Cross-References to Related Applications
[01] This application claims the priority of US provisional patent application No.60/868,679, filed on December 05, 2006, entitled "Method and System for Distributed Architecture for Monitoring Session Liveness", the content of which is incorporated herein by reference in its entirety.
Field of the Invention
[02] The present invention relates to communication technologies, and more particularly, to a method and a system for distributed monitoring of Internet Protocol (IP) session liveness and centralized control of IP sessions.
Background of the Invention
[03] In a Digital Subscriber Line (DSL) network, a conventional technique for session monitoring is based on Point-to-Point Protocol (PPP) session status. In the context of a pure IP based session, DSL-Forum is considering proposals for liveness monitoring based on IETF Bidirectional Forwarding Detection (BFD). Currently, a DSL session is PPP based and status of this session can be monitored based on PPP capabilities. Pure IP based sessions do not have the inherent ability to be monitored. Various mechanisms based on authentication and status of the traffic with respect to that IP address is used to monitor the status of the IP address. From the above, it is seen that an improved technique for IP session monitoring is desired.
Summary of the Invention
[04] According to an aspect of the present invention, there is provided a system for IP session liveness monitoring, including:
[05] one or more session monitoring devices; and
[06] a session control device, where
[07] each of the one or more session monitoring devices is adapted for acquiring status of an IP session at one or more monitored devices and reporting the status of the IP session to the session control device. [08] According to another aspect of the present invention, there is provided a method for IP session liveness monitoring, including:
[09] acquiring, from one or more monitored devices, status of an IP session at the one or more monitored devices, and
[10] reporting the status of the IP session to a session control device.
[11] As shown, the above features may be in one or more of the embodiments to follow. These features are merely examples, which should not unduly limit the scope of the invention. One of the ordinary skilled in the art would recognize many variations, modifications, and alternative.
Brief Descriptions of the Drawings
[12] Figure 1 is a simplified view diagram of a system for monitoring the "liveness" of an IP session according to an embodiment of the present invention;
[13] Figure 2 is a simplified view diagram of a method for monitoring in a Routed Residential Gateway (RG) Model of DSL networks according to an embodiment of the present invention;
[14] Figure 3 is a simplified view diagram of a method for monitoring in a Bridged RG Model of DSL Networks according to an embodiment of the present invention.
Detailed Description of the Preferred Embodiments
[15] Figure 1 is a simplified view diagram of a system for monitoring the "liveness" of an IP session according to an embodiment of the present invention. This diagram is merely an example, which should not unduly limit the scope of the invention herein. One of the ordinary skilled in the art would recognize other variations, modifications, and alternatives.
[16] As shown in Figure 1, the IP session Monitoring Function (MF) is responsible for monitoring the liveness of IP sessions at the Monitored Hosts (MHs). The MF reports the status to the IP session Control Function (CF). Depending on the embodiments, MFs may use multiple means to monitor liveness. For example, an MF could rely on upstream traffic as an indicator of liveness. In another example, it may use a polling mechanism such as Address Resolution Protocol (ARP) in the absence of upstream IP traffic. In a specific embodiment, CF is notified of any change of status using a liveness reporting protocol such as ANCP (H.248, GSMP). Of course, there can be other variations, modifications, and alternative.
[17] In a DSL network, the current state of the art for session monitoring is based on PPP session status. In the context of a pure IP based session, DSL-Forum is considering proposals for liveness monitoring based on IETF BFD. Conventional proposals suggest that ARP is not considered plausible due to the security related problems of ARP itself.
[18] According to an embodiment of the invention, there is provided a method which includes an ARP that is secured from spoofing attacks by using an authenticated MAC. For example, authentication of MAC addresses have been done in Data Over Cable Service Interface Specifications (DOCSIS) (cable) networks and is proposed in WiMAX networks also. In a specific embodiment, a method is provided for an architecture for DSL networks using standard IEEE specified authenticated MAC (802.1 AR) in combination with ARP for monitoring.
[19] According to embodiments of the invention, two main architectures for DSL networks are shown below. In a specific embodiment, the Digital Subscriber Line Access Multiplexer (DSLAM) obtains session status using ARP messages when there is no user originated traffic. Change of session status can be conveyed from DSLAM to Broadband Network Gateway (BNG) using ANCP notification messages. Of course, there can be other variations, modifications, and alternative.
[20] Figure 2 is a simplified view diagram of a method for monitoring in a Routed RG Model of DSL networks according to an embodiment of the present invention. This diagram is merely an example, which should not unduly limit the scope of the invention herein. One of the ordinary skilled in the art would recognize other variations, modifications, and alternatives. In an embodiment, in the case of a routed RG, the devices behind the RG (e.g. in a home network) do not interact directly at the IP layer with the DSL network. The DSL service is offered to the user represented by the RG. As shown in Figure 2, in a specific embodiment, the ARP exchange would take place between the RG and DSLAM. In an embodiment, ARP in the home network is bounded by the RG (or some firewall in the home network). Of course, there can be other variations, modifications, and alternative.
[21] Figure 3 is a simplified view diagram of a method for monitoring in a Bridged RG Model of DSL Networks according to an embodiment of the present invention. This diagram is merely an example, which should not unduly limit the scope of the invention herein. One of the ordinary skilled in the art would recognize other -A- variations, modifications, and alternatives. As shown, when a bridged RG is present in the network, the devices behind the RG are part of IP network of the DSL network provider according to a specific embodiment. In an embodiment of the invention, the ARP exchange would take place directly between the devices and the DSLAM. Of course, there can be other variations, modifications, and alternative.
[22] Many benefits are achieved by way of the present invention over conventional techniques. For example, according to embodiments of the invention, a method is provided for distributed IP session monitoring using an ARP message mechanism. As is known, it is advantageous that the ARP mechanism is present in many IP stacks and has wide spread availability in different devices and operating systems. In embodiments of the invention, interoperability related issues are minimized. In a specific embodiment of the invention, a method is provided for distributed IP monitoring where a DSLAM closer to the end host monitors the status, while the IP session status can be managed by the controller (BNG). Embodiments of the invention also allow for better scalability.
[23] Merely by way of example, the invention has been applied to systems based on secure ARP for a DSL network. But it would be recognized that the invention has a much broader range of applicability.
[24] It is also understood that the examples and embodiments described herein are for illustrative purposes only and that various modifications or changes in light thereof will be suggested to persons skilled in the art and are to be included within the spirit and purview of this application.

Claims

1. A system for IP session liveness monitoring, comprising:
one or more session monitoring devices; and
a session control device,
wherein each of the one or more session monitoring devices is adapted for acquiring status of an IP session at one or more monitored devices and reporting the status of the IP session to the session control device.
2. The system for IP session liveness monitoring according to claim 1, wherein each of the one or more session monitoring devices is further adapted for relying on traffic from the one or more monitored devices as an indicator of the IP session liveness.
3. The system for IP session liveness monitoring according to claim 1, wherein each of the one or more session monitoring devices is further adapted for using a polling mechanism to acquire the status of the IP session.
4. The system for IP session liveness monitoring according to claim 3, wherein the polling mechanism is secure Address Resolution Protocol, ARP.
5. The system for IP session liveness monitoring according to claim 1, wherein each of the one or more session monitoring devices reports the status of the IP session to the session control device through a liveness reporting protocol.
6. The system for IP session liveness monitoring according to claim 5, wherein the liveness reporting protocol is Access Network Control Protocol, ANCP.
7. The system for IP session liveness monitoring according to claim 5, wherein the liveness reporting protocol is H.248 protocol or General Switch Management Protocol, GSMP.
8. The system for IP session liveness monitoring according to claim 1, wherein the session monitoring device is a Digital Subscriber Line Access Multiplexer, DSLAM, and the session control device is a Broadband Network Gateway, BNG
9. The system for IP session liveness monitoring according to claim 1, wherein the monitored device is adapted for representing one or more User Equipments and interacting directly at IP layer with a network.
10. The system for IP session liveness monitoring according to claim 9, wherein the monitored device is an RG.
11. The system for IP session liveness monitoring according to claim 1, wherein the monitored device is a user device behind an RG.
12. A method for IP session liveness monitoring, comprising:
acquiring, from one or more monitored devices, status of an IP session at the one or more monitored devices, and
reporting the status of the IP session to a session control device.
13. The method for IP session liveness monitoring according to claim 12, wherein the status of the IP session at the one or more monitored devices is acquired with traffic from the one or more monitored devices as an indicator of the IP session liveness.
14. The method for IP session liveness monitoring according to claim 12, wherein the status of the IP session at the one or more monitored devices is acquired with a polling mechanism.
15. The method for IP session liveness monitoring according to claim 14, wherein the polling mechanism is secure Address Resolution Protocol, ARP.
16. The method for IP session liveness monitoring according to claim 12, wherein the status of the IP session is reported to the session control device through a liveness reporting protocol.
17. The method for IP session liveness monitoring according to claim 16, wherein the liveness reporting protocol is Access Network Control Protocol, ANCP.
18. The method for IP session liveness monitoring according to claim 16, wherein the liveness reporting protocol is H.248 protocol or General Switch Management Protocol, GSMP.
19. The method for IP session liveness monitoring according to claim 12, wherein the monitored device represents one or more User Equipments and interacts directly at IP layer with a DSL network.
20. The method for IP session liveness monitoring according to claim 19, wherein the monitored device is an RG..
21. The method for IP session liveness monitoring according to claim 12, wherein the monitored device is a user device behind an RG.
22. The method for IP session liveness monitoring according to claim 12, comprise: acquiring, by a Digital Subscriber Line Access Multiplexer, DSLAM, from one or more monitored devices, status of an IP session at the one or more monitored devices, and
reporting, by the DSLAM, status of the IP session to a Broadband Network Gateway, BNG
PCT/CN2007/071165 2006-12-05 2007-12-04 Method and system for distributed architecture for monitoring session liveness WO2008067760A1 (en)

Applications Claiming Priority (2)

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US86867906P 2006-12-05 2006-12-05
US60/868,679 2006-12-05

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WO2010083739A1 (en) * 2009-01-21 2010-07-29 华为技术有限公司 Ip session liveness monitoring method and system, home gateway and network equipment

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CN107231401B (en) 2016-03-25 2021-02-09 华为技术有限公司 Session monitoring method, device and system

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JP2005223496A (en) * 2004-02-04 2005-08-18 Nippon Telegr & Teleph Corp <Ntt> Congestion controller, congestion control method, and program
CN1750503A (en) * 2004-09-17 2006-03-22 大唐高鸿数据网络技术股份有限公司 Device and its method for increasing multimedia communication quality by monitoring RTP/RTCP stream

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CN1398493A (en) * 2000-12-07 2003-02-19 松下电器产业株式会社 Base station appts. and radio communication channel allotting method
JP2005223496A (en) * 2004-02-04 2005-08-18 Nippon Telegr & Teleph Corp <Ntt> Congestion controller, congestion control method, and program
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