US20020023160A1 - Service selection in a shared access network providing access control - Google Patents

Service selection in a shared access network providing access control Download PDF

Info

Publication number
US20020023160A1
US20020023160A1 US09/813,258 US81325801A US2002023160A1 US 20020023160 A1 US20020023160 A1 US 20020023160A1 US 81325801 A US81325801 A US 81325801A US 2002023160 A1 US2002023160 A1 US 2002023160A1
Authority
US
United States
Prior art keywords
network
service
access
address
invention
Prior art date
Legal status (The legal status 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 status listed.)
Abandoned
Application number
US09/813,258
Inventor
John Garrett
Charles Kalmanek
Han Nguyen
Kadangode Ramakrishnan
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
AT&T Corp
Original Assignee
AT&T Corp
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
Priority to US19063300P priority Critical
Priority to US19063600P priority
Application filed by AT&T Corp filed Critical AT&T Corp
Priority to US09/813,258 priority patent/US20020023160A1/en
Assigned to AT&T CORP. reassignment AT&T CORP. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: RAMAKRISHNAN, KADANGODE K., NGUYEN, HAN Q., KALMANEK, JR., CHARLES ROBERT, GARRETT, JOHN W.
Publication of US20020023160A1 publication Critical patent/US20020023160A1/en
Application status is Abandoned legal-status Critical

Links

Images

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L29/00Arrangements, apparatus, circuits or systems, not covered by a single one of groups H04L1/00 - H04L27/00 contains provisionally no documents
    • H04L29/12Arrangements, apparatus, circuits or systems, not covered by a single one of groups H04L1/00 - H04L27/00 contains provisionally no documents characterised by the data terminal contains provisionally no documents
    • H04L29/12009Arrangements for addressing and naming in data networks
    • H04L29/12207Address allocation
    • H04L29/12311Address allocation involving portability aspects
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00Data switching networks
    • H04L12/28Data switching networks characterised by path configuration, e.g. local area networks [LAN], wide area networks [WAN]
    • H04L12/2801Broadband local area networks
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00Data switching networks
    • H04L12/28Data switching networks characterised by path configuration, e.g. local area networks [LAN], wide area networks [WAN]
    • H04L12/2854Wide area networks, e.g. public data networks
    • H04L12/2856Access arrangements, e.g. Internet access
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00Data switching networks
    • H04L12/28Data switching networks characterised by path configuration, e.g. local area networks [LAN], wide area networks [WAN]
    • H04L12/2854Wide area networks, e.g. public data networks
    • H04L12/2856Access arrangements, e.g. Internet access
    • H04L12/2858Access network architectures
    • H04L12/2859Point-to-point connection between the data network and the subscribers
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00Data switching networks
    • H04L12/28Data switching networks characterised by path configuration, e.g. local area networks [LAN], wide area networks [WAN]
    • H04L12/2854Wide area networks, e.g. public data networks
    • H04L12/2856Access arrangements, e.g. Internet access
    • H04L12/2858Access network architectures
    • H04L12/2861Point-to-multipoint connection from the data network to the subscribers
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00Data switching networks
    • H04L12/28Data switching networks characterised by path configuration, e.g. local area networks [LAN], wide area networks [WAN]
    • H04L12/2854Wide area networks, e.g. public data networks
    • H04L12/2856Access arrangements, e.g. Internet access
    • H04L12/2869Operational details of access network equipments
    • H04L12/287Remote access server, e.g. BRAS
    • H04L12/2872Termination of subscriber connections
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00Data switching networks
    • H04L12/28Data switching networks characterised by path configuration, e.g. local area networks [LAN], wide area networks [WAN]
    • H04L12/2854Wide area networks, e.g. public data networks
    • H04L12/2856Access arrangements, e.g. Internet access
    • H04L12/2869Operational details of access network equipments
    • H04L12/287Remote access server, e.g. BRAS
    • H04L12/2874Processing of data for distribution to the subscribers
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00Data switching networks
    • H04L12/28Data switching networks characterised by path configuration, e.g. local area networks [LAN], wide area networks [WAN]
    • H04L12/2854Wide area networks, e.g. public data networks
    • H04L12/2856Access arrangements, e.g. Internet access
    • H04L12/2869Operational details of access network equipments
    • H04L12/287Remote access server, e.g. BRAS
    • H04L12/2876Handling of subscriber policies
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00Data switching networks
    • H04L12/28Data switching networks characterised by path configuration, e.g. local area networks [LAN], wide area networks [WAN]
    • H04L12/46Interconnection of networks
    • H04L12/4633Interconnection of networks using encapsulation techniques, e.g. tunneling
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00Data switching networks
    • H04L12/54Store-and-forward switching systems
    • H04L12/56Packet switching systems
    • H04L12/5691Access to open networks; Ingress point selection, e.g. ISP selection
    • H04L12/5692Selection among different networks
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L29/00Arrangements, apparatus, circuits or systems, not covered by a single one of groups H04L1/00 - H04L27/00 contains provisionally no documents
    • H04L29/02Communication control; Communication processing contains provisionally no documents
    • H04L29/06Communication control; Communication processing contains provisionally no documents characterised by a protocol
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L29/00Arrangements, apparatus, circuits or systems, not covered by a single one of groups H04L1/00 - H04L27/00 contains provisionally no documents
    • H04L29/12Arrangements, apparatus, circuits or systems, not covered by a single one of groups H04L1/00 - H04L27/00 contains provisionally no documents characterised by the data terminal contains provisionally no documents
    • H04L29/12009Arrangements for addressing and naming in data networks
    • H04L29/12018Mapping of addresses of different types; address resolution
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L29/00Arrangements, apparatus, circuits or systems, not covered by a single one of groups H04L1/00 - H04L27/00 contains provisionally no documents
    • H04L29/12Arrangements, apparatus, circuits or systems, not covered by a single one of groups H04L1/00 - H04L27/00 contains provisionally no documents characterised by the data terminal contains provisionally no documents
    • H04L29/12009Arrangements for addressing and naming in data networks
    • H04L29/12792Details
    • H04L29/12811Caching of addresses
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L45/00Routing or path finding of packets in data switching networks
    • H04L45/30Special provisions for routing multiclass traffic
    • H04L45/302Route determination based on requested QoS
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L45/00Routing or path finding of packets in data switching networks
    • H04L45/30Special provisions for routing multiclass traffic
    • H04L45/306Route determination based on the nature of the carried application
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00Traffic regulation in packet switching networks
    • H04L47/10Flow control or congestion control
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00Traffic regulation in packet switching networks
    • H04L47/10Flow control or congestion control
    • H04L47/20Policing
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L61/00Network arrangements or network protocols for addressing or naming
    • H04L61/10Mapping of addresses of different types; Address resolution
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L61/00Network arrangements or network protocols for addressing or naming
    • H04L61/20Address allocation
    • H04L61/2007Address allocation internet protocol [IP] addresses
    • H04L61/2015Address allocation internet protocol [IP] addresses using the dynamic host configuration protocol [DHCP] or variants
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L61/00Network arrangements or network protocols for addressing or naming
    • H04L61/20Address allocation
    • H04L61/2084Address allocation involving portability aspects
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L61/00Network arrangements or network protocols for addressing or naming
    • H04L61/60Details
    • H04L61/6009Caching of addresses
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L63/00Network architectures or network communication protocols for network security
    • H04L63/02Network architectures or network communication protocols for network security for separating internal from external traffic, e.g. firewalls
    • H04L63/0227Filtering policies
    • H04L63/0236Filtering by address, protocol, port number or service, e.g. IP-address or URL
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L63/00Network architectures or network communication protocols for network security
    • H04L63/08Network architectures or network communication protocols for network security for supporting authentication of entities communicating through a packet data network
    • H04L63/0807Network architectures or network communication protocols for network security for supporting authentication of entities communicating through a packet data network using tickets, e.g. Kerberos
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L63/00Network architectures or network communication protocols for network security
    • H04L63/08Network architectures or network communication protocols for network security for supporting authentication of entities communicating through a packet data network
    • H04L63/0869Network architectures or network communication protocols for network security for supporting authentication of entities communicating through a packet data network for achieving mutual authentication
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00Network-specific arrangements or communication protocols supporting networked applications
    • H04L67/10Network-specific arrangements or communication protocols supporting networked applications in which an application is distributed across nodes in the network
    • H04L67/1002Network-specific arrangements or communication protocols supporting networked applications in which an application is distributed across nodes in the network for accessing one among a plurality of replicated servers, e.g. load balancing
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00Network-specific arrangements or communication protocols supporting networked applications
    • H04L67/16Service discovery or service management, e.g. service location protocol [SLP] or Web services
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00Network-specific arrangements or communication protocols supporting networked applications
    • H04L67/42Protocols for client-server architectures
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L69/00Application independent communication protocol aspects or techniques in packet data networks
    • H04L69/16Transmission control protocol/internet protocol [TCP/IP] or user datagram protocol [UDP]
    • H04L69/161Implementation details of TCP/IP or UDP/IP stack architecture; Specification of modified or new header fields
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L69/00Application independent communication protocol aspects or techniques in packet data networks
    • H04L69/22Header parsing or analysis
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L29/00Arrangements, apparatus, circuits or systems, not covered by a single one of groups H04L1/00 - H04L27/00 contains provisionally no documents
    • H04L29/12Arrangements, apparatus, circuits or systems, not covered by a single one of groups H04L1/00 - H04L27/00 contains provisionally no documents characterised by the data terminal contains provisionally no documents
    • H04L29/12009Arrangements for addressing and naming in data networks
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L61/00Network arrangements or network protocols for addressing or naming
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L63/00Network architectures or network communication protocols for network security
    • H04L63/14Network architectures or network communication protocols for network security for detecting or protecting against malicious traffic
    • H04L63/1441Countermeasures against malicious traffic
    • H04L63/1466Active attacks involving interception, injection, modification, spoofing of data unit addresses, e.g. hijacking, packet injection or TCP sequence number attacks
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L69/00Application independent communication protocol aspects or techniques in packet data networks
    • H04L69/16Transmission control protocol/internet protocol [TCP/IP] or user datagram protocol [UDP]
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L69/00Application independent communication protocol aspects or techniques in packet data networks
    • H04L69/30Definitions, standards or architectural aspects of layered protocol stacks
    • H04L69/32High level architectural aspects of 7-layer open systems interconnection [OSI] type protocol stacks
    • H04L69/322Aspects of intra-layer communication protocols among peer entities or protocol data unit [PDU] definitions
    • H04L69/329Aspects of intra-layer communication protocols among peer entities or protocol data unit [PDU] definitions in the application layer, i.e. layer seven

Abstract

It is an object of the invention to enable multiple services or service providers to share the facilities of an access network infrastructure providing physical connectivity to subscribers. A network access device advantageously may be used in communication network services with a service or service provider that is separate from the operator of the access network infrastructure.

Description

    FIELD OF THE INVENTION
  • The present invention relates generally to communication network services, and, more particularly, to providing multiple services in a communication network. [0001]
  • BACKGROUND OF THE INVENTION
  • Customers of communication network services often desire access to a plurality of different services and different service providers. For example, when using a dial-up connection to a packet-switched data network such as the Internet, a customer can choose from multiple service providers by dialing different telephone numbers in the PSTN. The physical path from the customer to the customer's Internet Service Provider (ISP) is dedicated to the connection for the duration of the telephone call. The ISP assigns an IP address to the customer and can link the authenticated customer and the assigned IP address to the physical address (e.g. dial-up modem) used by the customer. With this linkage, the ISP can ensure the customer only uses the address authorized by the ISP and can use the customer's IP address to manage access to the ISP's services. The physical connection between a customer and the ISP, as well as the linkage to IP address assignment and customer authentication is terminated when the dial-up connection is terminated. [0002]
  • Constrained by the physical capacity of these temporary connections across the PSTN, many service providers are moving to high-speed access architectures (e.g., digital subscriber line (DSL), wireless, satellite, or cable) that provide dedicated physical connectivity directly to the subscriber and under the control of the ISP. These alternatives to shared access through the switched telephone network, however, do not lend themselves to shared access by multiple services and/or service providers. [0003]
  • SUMMARY OF THE INVENTION
  • It is an object of the invention to enable multiple services or service providers to share the facilities of an access network infrastructure providing physical connectivity to subscribers. In accordance with an embodiment of the invention, a router situated at an edge of an access network forwards packets to any of a plurality of packet-switched service networks. The router uses a policy based on the source address of the packets to determine to which service network to forward the packet. Each network access device is assigned a network address, which is associated with a particular service or service provider to which the user of the device is subscribed. The network access device advantageously may be used in communication network services with a service or service provider that is separate from the operator of the access network infrastructure. [0004]
  • In accordance with another aspect of the invention, interconnections between a plurality of packet-switched service networks and an access network are localized into managed access points. Routers in the access network can advantageously forward packets to the managed access points using conventional routing procedures, thus enabling the access network to provide “local” packet-switched services. The managed access points use source address-based policy to determine to which service network to forward a packet. Where a packet arrives at a managed access point that is not connected to the correct service network, the managed access point can use packet encapsulation or some other form of tunneling to redirect the packet to the correct managed access point. The present invention, among other advantages, does not require interconnection points to each service network at every regional access network site. [0005]
  • In accordance with another aspect of the invention, a configuration server, upon receiving a request from a network access device selecting a particular service, allocates a network address from a pool of addresses associated with the service and assigns the network address to the network access device using a host configuration protocol, such as DHCP. In accordance with an embodiment of the invention, the configuration server authenticates the network access device before assigning a network address. In accordance with another embodiment of the invention, the configuration server transmits authentication information received from the network access device to a server in the service network responsible for authentication. In accordance with another embodiment of the invention, the host configuration protocol messages acknowledging allocation of a network address to the service subscriber's network access device are used to create entries in an address resolution protocol cache in order to restrict access to the access network infrastructure to those network access devices that are properly registered and authenticated. In accordance with another embodiment of the invention, the host configuration protocol acknowledging allocation of the network address to the service subscriber's network access device are used to initiate the distribution of service policies to policy enforcement points in order to enable differentiated quality-of-support for different subscribers of different services or service providers. The present invention, among other advantages, enables the network addresses—which ultimately determine the service network utilized by the particular network access device—to be allocated and reassigned dynamically. [0006]
  • These and other advantages of the invention will be apparent to those of ordinary skill in the art by reference to the following detailed description and the accompanying drawings.[0007]
  • BRIEF DESCRIPTION OF THE DRAWINGS
  • FIG. 1 illustrates an interconnection of packet-switched service networks and an access network embodying principles of the invention. [0008]
  • FIG. 2A and FIG. 2B is conceptual representation of an example embodiment illustrating principles of the invention based on an HFC access architecture with corresponding end-to-end protocol layers. [0009]
  • FIG. 3 is a flowchart of processing performed at a policy router, in accordance with an embodiment of the invention. [0010]
  • FIG. 4 is a simplified example of router configuration instructions. [0011]
  • FIG. 5 illustrates an interconnection of packet-switched service network, regional access networks, and a packet-switched access network, embodying principles of another aspect of the invention. [0012]
  • FIG. 6 is a flowchart of processing performed at a policy router acting as a managed access point, in accordance with another embodiment of the invention. [0013]
  • FIG. 7 is a timeline diagram of messages exchanged in the assignment of a network address associated with a particular service to a network access device, in accordance with a preferred embodiment of another aspect of the invention. [0014]
  • FIG. 8 is a conceptual representation of a DHCP message exchanged between the network access device and a DHCP server. [0015]
  • FIG. 9 is timeline diagram of messages exchanged in the assignment of a network address associated with a particular service to a network access device, in accordance with a preferred embodiment of another aspect of the invention. [0016]
  • FIG. 10 is a timeline diagram of messages exchanged in the assignment of a network address associated with a particular service to a network access device, in accordance with a preferred embodiment of another aspect of the invention. [0017]
  • FIG. 11 is a flowchart of processing performed at a Cable Modem Termination System, exemplifying an embodiment of another aspect of the invention. [0018]
  • FIG. 12 is a timeline diagram of messages exchanged in the assignment of a service class to a subscriber, in accordance with a preferred embodiment of another aspect of the invention. [0019]
  • FIG. 13 is a conceptual diagram of a hierarchical link-sharing structure. [0020]
  • DETAILED DESCRIPTION
  • In FIG. 1, a plurality of subscribers operating network access devices [0021] 101, 102, 103, . . . 104 are provided access to communication network services, which are facilitated by a plurality of packet-switched data networks, shown in FIG. 1 as 151 and 152. Packet-switched data networks 151 and 152, referred to herein as “service networks,” offer access to different services and/or are operated by different service providers. For example, service network 151 could provide packet-switched connectivity to public data networks while service network 152 could offer packet-switched telephony service (or the same public data network connectivity, but from a different service provider). The service networks, as is well known in the art, utilize a network addressing scheme to route datagrams to and from hosts: for example, where the service networks utilize the TCP/IP protocol suite, Internet Protocol (IP) addresses are assigned to each host and utilized in the process of routing packets from a source to a destination in the networks. See, e.g., “INTERNET PROTOCOL,” IETF Network Working Group, RFC 791 (September 1981); S. Deering, R. Hinden, ,“Internet Protocol, Version 6 (IPv6) Specification,” IETF Network Working Group, RFC 1883 (December 1995), which are incorporated by reference herein. The invention shall be described herein with particular reference to the TCP/IP protocol suite and IP addresses, although those skilled in the art would readily be able to implement the invention using any of a number of different communication protocols.
  • The network access devices [0022] 101 . . . 104 are typically customer premises equipment (CPE) such as a personal computer, information appliance, personal data assistant, data-enabled wireless handset, or any other type of device capable of accessing information through a packet-switched data network. Each network access device 101 . . . 104 is either connected to or integrated with a network interface unit 111 . . . 114, e.g. a modem, which enables communication through an access network infrastructure, shown as 120 in FIG. 1. Each network access device is assigned an IP address which, in accordance with an aspect of the invention, is associated with a particular service or service provider to which the user of the device is subscribed. For example, network access device 101 is assumed to have been assigned, for purposes of the description herein, an IP address associated with a service provider operating service network 151. As further described herein, it is advantageous to provide a service activation system 160 which advantageously permits the dynamic allocation, assignment, and reassignment of IP addresses to the plurality of network access devices based on customer subscriptions to particular services.
  • The network access device [0023] 101 communicates with the service network 151 through the access network infrastructure 120, which, in accordance with aspects of the invention, is capable of recognizing and directing traffic to the proper service network. The access network infrastructure 120 advantageously can be operated and maintained by an entity that is the same as or different from the entities operating and maintaining the service networks 151 and 152. In accordance with an embodiment of an aspect of the present invention, the different IP-based services offered by the different service networks 151 and 152 utilize shared layer one and layer two resources in the access network 120. Layer three routing procedures, however, are modified to permit IP traffic from network access device 101 to flow to the correct subscribed service network 151. The access network 120 has a router 130 on the edge of the access network. The router 130 has a first interface with a connection to a router 141 in service network 151 and a second interface with a connection to a router 142 in service network 152. As further described herein, the router processes packets and is capable of directing traffic to the proper service network.
  • FIG. 2A shows an exemplary access architecture based on a hybrid fiber coaxial (HFC) access network. As is known in the art, each network interface device [0024] 201 . . . 202 is either connected to or integrated with a cable modem 211 which enables communication through the HFC network 221. In accordance with the Data Over Cable Service Interface Specification (DOCSIS), a Cable Modem Termination System (CMTS), shown as 225 in FIG. 2A, communicates with the cable modems 211 and manages access to both upstream and downstream cable capacity on the HFC networks 221. See, e.g., “Data-Over-Cable Service Interface Specifications: Cable Modem Termination System—Network Side Interface Specification,” Cable Television Laboratories, Inc., SP-CMTS-NSI-I01-960702; “Data-Over-Cable Service Interface Specifications: Cable Modem to Customer Premise Equipment Interface Specification,” Cable Television Laboratories, Inc., SP-CMCI-C02C-991015; “Data-Over-Cable Service Interface Specifications: Baseline Privacy Plus Interface Specifications,” Cable Television Laboratories, Inc., SP-BPI+-I06-001215, which are incorporated by reference herein. The CMTS 225 manages the scheduling of both upstream and downstream transmission and allocates cable capacity to individual customers identified by a Service IDs (SIDs). The CMTS 225 can have an integrated router 228 or can be a separate device 226 that bridges to a fast Ethernet switch 227 which connects to the router 228. The IP router 228 provides connectivity to an IP network 222, which further comprises the router 230 (corresponding to router 130 in FIG. 1) which interfaces to IP routers 241 and 242 in service networks 251 and 252, respectively. Accordingly, the HFC network 221, the CMTS 225, and the IP network 222 correspond to the access network infrastructure 120 shown in FIG. 1. FIG. 2B shows a conceptual diagram of the end-to-end communication protocol stack from a network access device 201 (101) to a router 241 (141) in service provider's network 251 (151). As is known in the art, the lowest layer deals with the physical layer (PL) of the protocol stack, e.g. the Ethernet physical media device (PMD) layer; the second layer deals with the data link layer, e.g. the Ethernet Media Access Control (MAC) layer; and the third layer in the protocol stack deals with the network layer, e.g. the IP layer. The following aspects of the invention deal with modifications to routing processes in the network layer of the protocol stack.
  • Router [0025] 130 in the access network 120 in FIG. 1 (corresponding to IP router 230 in FIG. 2) separates the IP traffic to the multiple services or service providers as well as combines traffic from the multiple services or service providers. In accordance with an aspect of the invention, IP packets are routed from network access device 101 to the subscribed service network 151 using source address-based policy routing. Conventional routing is destination-based: the router consults an internal routing table which maps the destination addresses of all inbound packets to a physical interface address for use for outgoing packets. Policy routing schemes, however, will selectively choose different paths for different packets even where the packet's destination address may be the same. Since network access devices are assigned addresses associated with a particular network service provider, the source address based policy routing scheme ensures packets from a network access device will go to the appropriate service network. Conventional destination-based routing will ensure that packets addressed to a network access device will be routed to the appropriate service network. Note that this would require service providers to advertise their service address ranges to their peers.
  • FIG. 3 sets forth the processing performed at a router in the access network, e.g. router [0026] 130 in FIG. 1. At step 301, the router receives an incoming packet. At step 302, the router reads the packet header and retrieves the packet filtering rules, typically stored in an access list as further described below. At steps 303, 305, and 307, the router applies the packet filtering rules. At step 303, the router compares the source IP address in the packet header to a list of addresses allocated to subscribers of services of a first service provider, e.g. operating service network 151 in FIG. 1. If the source address matches one of these addresses, then at step 304 the router forwards the packet to a router in service network 151, e.g. router 141 in FIG. 1. At step 305, the router compares the source IP address in the packet header to a list of addresses allocated to subscribers of services of a second service provider, e.g. operating service network 152 in FIG. 1. If the source IP address matches one of these addresses, then at step 305 the router forwards the packet to a router in service network 152, e.g. router 142 in FIG. 1. The router continues in this fashion with any other packet filtering rules identifying IP addresses allocated to subscribers of any other service providers. Assuming the IP source address does not match any such addresses associated with a service provider, at step 307, the router applies any remaining packet filtering rules and routes or denies the packet accordingly.
  • FIG. 4 sets forth an example of router configuration instructions written for the Cisco Internetworking Operating System (IOS), which is used pervasively on conventional IP routers. Only the relevant portions of the configuration instructions are shown. Lines [0027] 401 to 405 configure the interface to utilize policy routing. Lines 406 to 410 specify the particular policy, namely to set the next “hop” address to the router address of a router in a one of the service networks, i.e. “isp1_next-hop_address,” if the source address matches a range of addresses allocated to subscribers of the services provided by the service network, i.e. “isp1_subs.” Lines 412 to 413 set forth access lists associating “isp1_subs” with ranges of addresses expressed, by convention, as a source address and a mask portion, i.e., the above policy is applied by the router to any traffic with a subscriber source address expressed as “isp1_prefix1” with a mask portion of “isp1_prefix1_wildcard”.
  • The embodiment shown in FIG. 1 notably requires interconnection points to all relevant service networks at each edge of each regional access network. In accordance with another aspect of the invention, it is desirable to create a regional transport network of routers and to localize the interconnection between the service networks and the access infrastructure into managed access points. A managed access point is a physical location at which the interfaces to the service networks can be provided. Having one or a small plurality of managed access points advantageously allows service selection to be implemented without requiring network service providers to connect physical facilities into, for example, every cable head end in an HFC-based network—thereby reducing costs for both the access network infrastructure operator and the service network providers. Each router in the regional transport network can be configured with policy information and invoke source address routing to forward packets to the managed access point providing access to the relevant service network. By overriding normal routing procedures, however, these procedures may introduce potential routing loops absent significant coordination between the routers external to known routing protocols. This risk can be minimized by centralizing the policy routing function in a single router that provides the interfaces to the service networks. [0028]
  • FIG. 5 illustrates an embodiment of this aspect of the invention. Each network access device [0029] 501 is connected through a network interface unit 511 to one of a plurality of access networks, e.g. 521 and 522 in FIG. 5. Each access network has an edge router (531 and 532 respectively in FIG. 5) which connects the access network to a regional IP network of routers, represented abstractly in FIG. 5 as 1P access network 570. It is advantageous to aggregate connections from groups of edge routers to a single aggregation router 571 in the IP access network 570, as shown in FIG. 5. Aggregation router 571 can then connect to other routers in the regional IP network 570, i.e. routers 572 . . . 573, which can also be aggregation routers connecting to pluralities of edge routers. Routers 541, 542, . . . 543 in service networks 551, 552, . . . 553 connect to the IP network 570 at routers 574 and 575, which act as managed access points to the service networks. Only the managed access point routers, e.g. 575, need invoke policy routing based on packet source address. All intermediate routers within the IP access network 570, i.e. 571 . . . 573, use normal destination-based forwarding procedures for destinations that are not local to the network 570. No configuration of policy in the intermediate routers is necessary.
  • By locating the policy routing functions at the interfaces to the service networks, the access network infrastructure (whether reflected generally by [0030] 120 in FIG. 1 or, in the packet-switched context, as network 570 in FIG. 5) can provide access to “local” services available from within the access network infrastructure. For example, IP network 570 can provide access to “local” packet-switched services and operate independent of the source address assigned to the network access devices. Since the intermediate routers 571 . . . 573 all use conventional destination-based forwarding, network 570 will properly route local service packets along the correct routing paths. “Non-local” service packets, however, are routed towards the managed access point routers 575 and 574 and policy routed to the correct service network. Where the network 570 forwards to a single managed access point router or where each managed access point router has a connection to each service network, the managed access point router can forward packets in accordance with the policies described above. Where, however, there are service networks that connect to only a subset of the managed access points (e.g., in FIG. 5, where service network 553 only connects to managed access point router 574), packets can be redirected or “tunneled” to the correct managed access point in order to ensure that the packets arrive at the correct service network. The multiple interconnected managed access points can then provide a single “logical” inter-domain gateway, again permitting all other routers to use conventional destination-based routing procedures.
  • FIG. 6 sets forth a flowchart of the processing performed at a managed access point router, e.g. router [0031] 575 in FIG. 5, illustrating an embodiment of this aspect of the invention. The particular managed access point router 575 is assumed to be connected to two service networks, e.g. service networks 551 and 552 in FIG. 5, while a second managed access point router 574 provides access to a third service network, service network 553. At step 601, the router receives an incoming packet. At step 602, the router reads the packet header and retrieves the packet filtering rules, as well as decapsulates any encapsulated packets, as further described herein. At steps 603, 605, 607, and 609, the router applies the packet filtering rules. At step 603, the router compares the source IP address in the packet header to a list of addresses allocated to subscribers of services of a first service provider, e.g. operating service network 551 in FIG. 5. If the source address matches one of these addresses, then at step 604 the router forwards the packet to a router in service network 551, e.g. router 541 in FIG. 5. At step 605, the router compares the source IP address in the packet header to a list of addresses allocated to subscribers of services of a second service provider, e.g. operating service network 552 in FIG. 5. If the source IP address matches one of these addresses, then at step 606 the router forwards the packet to a router in service network 552, e.g. router 542 in FIG. 5. At step 607, the router compares the source IP address in the packet header to a list of addresses allocated to subscribers of services of a third service provider, e.g. operating service network 553 in FIG. 5, which is not connected to this particular managed access point. If the source IP address matches one of these addresses, then at step 608, the router encapsulates the packet, using any of a number of known methods for packet encapsulation, and routes the packet to a new destination address, namely the address of the managed access point with access to service network 553, i.e. managed access point router 574. Packet encapsulation is a method by which a packet may rerouted to an intermediate destination other than the destination that would be selected using normal routing procedures. See, e.g., C. Perkins, “IP Encapsulation within IP,” IETF Network Working Group, RFC 2003 (October 1996); C. Perkins, “Minimal Encapsulation within IP,” IETF Network Working Group, RFC 2004 (October 1996), which are incorporated by reference herein. The receiving router 574 will decapsulate the packet and route the packet, accordingly, to service network 553. The router continues in this fashion with any other packet filtering rules identifying IP addresses associated with any other service providers. Assuming the IP source address does not match any addresses associated with any other service providers, at step 609, the router applies any remaining packet filtering rules and routes or denies the packet accordingly. Note that if managed access point 575 has a direct physical connection to managed access point 574, then no encapsulation is needed. In fact, a typical configuration might include multiple port-constrained policy routers on a GIG Ethernet providing the logical managed access point function without any encapsulation. Encapsulation is only really needed to provide a logical direct connection if there is not a direct physical connection.
  • Packets traveling between network access devices connected to the same access network infrastructure can be forwarded directly between the devices in the access network—rather than forwarding the packets outwards to a service network and back to the same access network. This advantageously saves on bandwidth and other network resources. The only packets that need be routed to a managed access point router need be the ones for which no specific route is known internally to the access network infrastructure. [0032]
  • It is advantageous to enable the IP addresses—which ultimately determine the service network utilized by the particular network access device—to be allocated and reassigned dynamically. With reference to FIG. 1, a service activation system [0033] 160 is shown which further comprises a configuration server 161 and a registration server 162 connected to the access network infrastructure 120. The registration server 162 provides a network-based subscription/authorization process for the various services shared on the access network infrastructure 120. A customer desiring to subscribe to a new service can access and provide registration information to the registration server 162, e.g. by using HTML forms and the Hyper Text Transfer Protocol (HTTP) as is known in the art. Upon successful service subscription, the registration server 162 updates a customer registration database 163. The configuration server 161 uses the registration information to activate the service. The configuration server 161 is responsible for allocating network addresses on behalf of the service networks from a network address space associated with the selected service. In a preferred embodiment of this aspect of the invention, the configuration server 161 uses a host configuration protocol such as the Dynamic Host Configuration Protocol (DHCP) to configure the network addresses of the network access devices. See R. Droms, “Dynamic Host Configuration Protocol,” IETF Network Working Group, RFC 2131 (March 1997); S. Alexander, R. Droms, “DHCP Options and BOOTP Vendor Extensions,” IETF Network Working Group, RFC 2132 (March 1997); which are incorporated by reference herein. This aspect of the invention shall be described herein with particular reference to DHCP, and the configuration server 161 shall be referred to herein as the DHCP server, although those skilled in the art would readily be able to implement this aspect of the invention using a different protocol.
  • FIG. 7 is a simplified timeline diagram of DHCP messages exchanged as the DHCP server [0034] 720 assigns a service-specific network address to a network access device 710 acting as a DHCP client. At 701, the network access device 710 sends a DHCPDISCOVER message through the access network infrastructure. The DHCPDISCOVER message, in accordance with an aspect of the invention, includes a “svc-id” option field that identifies the service to which the network access device has been subscribed and from which service is desired. The DHCP server 720 receives the DHCPDISCOVER message and, at 702, allocates an IP address from the pool of addresses associated with the particular service. The DHCP server 720 can use the device's MAC address to lookup the customer's registration information and confirm that the device is authorized to access the identified service. Where the DHCP server 720 cannot find the device's MAC address in the registration database, the server can allocate a special IP address that only allows access to the registration server. At 703, the DHCP server 720 responds with a DHCPOFFER message that includes the IP address in a field in the DHCP message. At 704, the network access device 710 receives the DHCPOFFER (and any other offers from any other DHCP servers in the access network) and sends out a DHCPREQUEST directed to the DHCP server which requests the IP address identified in the DHCPOFFER. At 707, the DHCP server commits to assigning the IP address to the network access device, commits the binding to persistent storage, and transmits a DHCPACK message containing the configuration parameters for the device. If the DHCP server is unable to satisfy the DHCPREQUEST message, the server responds with a DHCPNAK message. FIG. 8 is a simplified representation of the fields in a DHCP message, including a “svc-id” option field (820) which identifies the selected service.
  • It is preferable that the DHCP servers and clients use some mutual authentication mechanism to restrict address assignment to authorized hosts and to prevent clients from accepting addresses from invalid DHCP servers. See, for example, the “delayed authentication” scheme described in R. Droms, W. Arbaugh, “Authentication for DHCP Messages,” IETF Network Working Group, Internet Draft, <draft-ietf-dhc-authentication-_.txt>; or the Kerberos-based authentication mechanism described in K. Hornstein, T. Lemon, B. Aboba, J. Trostle, “DHCP Authentication via Kerberos V,” IETF Network Working Group, Internet Draft, <draft-hornstein-dhc-kerbauth-_>; which are incorporated by reference herein. The “delayed authentication” mechanism supports mutual authentication of DHCP clients and servers based on a shared secret, which may be provisioned using out-of-band mechanisms. On the other hand, the Kerberos-based mechanisms are very well suited for inter-realm authentication, thereby supporting client mobility, i.e. a network access device could connect to a particular access network infrastructure without any prior registration with the access network. Each service network provider could securely authenticate the network access device accessing the service network from another network “realm,” e.g. the access network infrastructure. [0035]
  • The operator of the relevant service network, e.g. service network [0036] 152 in FIG. 1, may desire to maintain a separate registration server, e.g. server 155 in FIG. 1, and to retain responsibility for user authentication and authorization. The service activation system 160 can provide a proxy server configured to permits HTTP traffic only between local hosts and registration server 155 in service network 152. The service provider operating service network 152 would then be responsible for providing the appropriate registration information required for proper service selection to the service activation system 160. The service provider would also be responsible for notifying the service activation system 160 when service should be discontinued. Alternatively, the DHCP server 161 in the service activation system 160 can interact with the registration server 155 using a back-end authentication protocol, e.g. the Remote An Authentication Dial In User Service (RADIUS). See C. Rigney, A. Rubens, W. Simpson, S. Willens, “Remote Authentication Dial In User Service (RADIUS),” IETF Network Working Group, RFC 2058 (January 1997), which is incorporated by reference herein. The DHCP server can contain a RADIUS client and, thereby, leverage the large RADIUS embedded base used for dial access authentication. FIG. 9 illustrates this embodiment of this aspect of the invention in a flowchart corresponding to the flowchart shown in FIG. 7. At 903, the DHCP server 920 generates a random challenge and includes the challenge along with the allocated IP address in the DHCPOFFER message. The DHCP client 910 generates a response to the challenge by encrypting the challenge with a key that is derived from the subscriber's authentication information. At 904, the client 910 includes the challenge, response, and IP address in the DHCPREQUEST message. The DHCP server 920 forwards both the challenge and response in a RADIUS_ACCESS_REQ message to a RADIUS server 930 in the selected service network. The RADIUS server 930 either accepts or rejects the RADIUS request and responds accordingly at 906. If the RADIUS request is accepted, the DHCP server 920 sends a DHCPACK message at 907 and the client 910 enters a bound state. If the RADIUS request is rejected, the DHCP server 920 sends a DHCPNACK message which informs the client 910 that the IP address that was allocated has been withdrawn.
  • Rather than modifying the DHCP protocol in order to establish the association between the device's MAC address and the service selection, it is advantageous to use an alternative two-step process. The registration server [0037] 162 can associate the customer's IP address (used for registration) with the subscribed service, while the configuration server 161 can associate the customer's IP address with the customer's MAC address. The servers can interact and share their associations in the registration database 163 shown in FIG. 1. Thus, the subscriber can register the service selection with the registration server which temporarily establishes the association between the network access device's hardware address (e.g. the MAC address of the device) and the chosen service selection. The configuration server then uses the MAC address of the network access device to assign an IP address from the proper address space. FIG. 10 is a simplified timeline diagram of DHCP messages exchanged, in accordance with such an embodiment. At 1001, the network access device 1010 registers a service selection with the registration server 1030. It is assumed that the subscriber has passed the proper authentication procedures for the particular service selected, either beforehand (e.g. through transactions directly with the service provider's network) or in the same session with the registration server. The registration server 1030 sends some acknowledgment 1002 to the network access device 1010. At 1003, the registration server 1030 stores the selected service and associates the service selection with the hardware device address (e.g. MAC address) of the network access device 1010. After receiving the acknowledgment from the registration server 1030, the network access device 1010 releases any pre-existing address assignment by issuing a DHCPRELEASE message at 1004. At 1005, the network access device issues a standard DHCPDISCOVER message (i.e., there is no need for the service selection id in the message set forth above). The DHCP server 1020 receives the DHCPDISCOVER message and, at 1006, allocates an IP address from the pool of address associated with the particular service associated with the device's hardware address. At 1007, the DHCP server 1020 sends a DHCPOFFER message that includes the IP address in a field in the DHCP message. At 1008, the network access device 1010 receives the DHCPOFFER and sends out a DHCPREQUEST back to the DHCP server 1030. At 1009, the DHCP server 1030 commits to assigning the IP address to the network access device 1010, commits the binding to persistent storage, and transmits a DHCPACK message containing the configuration parameters for the device.
  • It is desirable to restrict access to the access network infrastructure to those network access devices that are properly registered and authenticated. In accordance with another aspect of the invention, the access network infrastructure can be configured to perform access control taking advantage of the above-described address allocation process. An access network infrastructure with broadcast capabilities will often use a protocol such as the Address Resolution Protocol (ARP) to map network layer addresses used by the packet-switched networks to the hardware addresses used in the datalink layer of the access network infrastructure. See, e.g., D. Plummer, “An Ethernet Address Resolution Protocol,” IETF Network Working Group, RFC 826 (November 1982). For example, and with reference to the HFC embodiment shown in FIG. 2, the CMTS [0038] 225 has an ARP cache, which is a table of entries storing bindings between IP addresses and the hardware MAC addresses assigned to network access devices 201, 202. The ARP cache permits the CMTS to learn the correspondence between IP addresses and MAC addresses without resorting to broadcasting an ARP request. As is known in the art, the CMTS can act as a DHCP relay agent and use information in DHCP messages to populate its ARP cache. This mechanism, in combination with the DHCP address allocation process described above, can be advantageously utilized to control access to the network.
  • With reference to FIG. 7 (and FIG. 9), the CMTS acts as a DHCP relay agent and snoops on DHCP messages exchanged between the host acting as a DHCP client and the DHCP server. At step [0039] 707 in FIG. 7 and step 907 in FIG. 9, the DHCP server issues a DHCPACK message with configuration parameters including the committed IP address allocated to the subscriber to the particular service selected, as described above. This only occurs after the proper authentication steps have been performed. FIG. 11 is a flowchart illustrating the processing performed at the CMTS. At step 1101, the CMTS receives the DHCP message and proceeds to snoop on its contents in the process of relaying it to the proper DHCP client at step 1106. At step 1102, the CMTS determines that the DHCP message is a DHCPACK message by examining the options field of the DHCP message. At step 1103, the CMTS proceeds to read the information from the DHCPACK message, in particular the “yiaddr” and “chaddr” fields (fields 805 and 808 in FIG. 8) which indicate the assigned IP address and the hardware MAC address respectively. The CMTS updates the ARP cache to reflect the mapping of IP address to MAC address (and SID) used for communication with the subscriber. Thereafter, the CMTS permits upstream and downstream packets to and from the particular network access device based on the ARP cache entry. Where there has been a failure in authentication, this will result in a failure to update the ARP cache and in a denial of access to the access network infrastructure. The information in the ARP cache entry can also be utilized by the CMTS to monitor attempts to “spoof”0 the IP address of an authenticated subscriber: e.g., by refusing to forward upstream packets with a source IP address that is not associated with the proper SID or MAC address. The CMTS can set the timeout for the ARP cache entry to the same value as the timeout for the IP address specified in the DHCP exchange. If a customer subsequently releases the IP address by issuing a DHCPRELEASE message (or declines to accept the offered IP address, both at step 1104), the CMTS flushes the corresponding ARP cache entry upon receipt of the DHCP message at step 1105.
  • The DHCP server should be configured to ensure that every response that changes an IP address assignment or a lease on a DHCP assignment gets relayed to the CMTS. For example, a network access device using standard DHCP can send a DHCPRENEW message directly to the DHCP server. The DHCP server would respond directly to the client, and the CMTS would not perform a DHCP relay function for these messages. Such direct communication between the DHCP client and server may modify information (e.g. lease time) used by the CMTS to manage the ARP cache. Therefore, it is advantageous to modify the DHCP server so that it will notify the CMTS of any changes to IP address assignment including lease time. This can be accomplished, for example, by sending all responses to the CMTS to relay to the client—rather than sending them directly to the client. [0040]
  • It is advantageous for the access network infrastructure to support quality-of-support, in particular to differentiate service between subscribers to different services or service providers. For example, with reference to FIG. 1, a subscriber to services offered by a service network [0041] 151 could get a higher share of access link capacity in the access network infrastructure than a subscriber to services offered by service network 152. Likewise, the aggregate capacity for subscribers to service network 151 may be different (e.g. higher) than aggregate capacity for subscribers to service network 152. It is preferable to avoid relying on the network access devices 101 . . . 104 or the network interface units 111 . . . 114 to enforce service policies. Instead, it is advantageous for the access network infrastructure to have a policy engine, referred to herein as a policy decision point, and points at which policies may be enforced. The policy decision point, for example, could be a server in the service activation system 160 in the access network infrastructure with access to the relevant registration information for subscribers. The policy decision preferably should be made at a point at which the association between the service network and the access network has been established, e.g. when the authenticated IP address is provided to the network access device as described above. The service class assignment would reflect the results of negotiation between the entity operating the access network infrastructure and the entity operating the service network.
  • FIG. 12, for example, sets forth a timeline diagram of messages exchanged in assigning a service class to a subscriber, in the context of the particular HFC architecture described above. At [0042] 1201, the network access device 1210 sends the DHCPREQUEST message to the DHCP server 1250, requesting the service-related IP address identified in a previous DHCPOFFER message. At 1202, the DHCP server 1250 commits to assigning the IP address to the network access device 1210 and transmits a DHCPACK message containing the configuration parameters for the device. At 1203, the DHCP server 1250 sends a message to a Policy Decision Point (“PDP”) 1240 authorizing assignment of a particular service class to the subscriber. The PDP 1240 transmits traffic parameters for the authorized service flow to the CMTS 1230, which receives the policy parameters at 1204 and begins the process of Dynamic Service Addition (DSA) in accordance with DOCSIS to schedule the service flow. A service flow, as defined by DOCSIS, is a unidirectional flow of packets that is provided a particular quality of service. At 1205, the CMTS 1230 sends a dynamic service addition request (DSA-REQ) message to the cable modem 1220 attached to the relevant network access device 1210. At 1206, the cable modem 1220 sends a dynamic service addition response (DSA-RSP) message after confirming that the cable modem 1220 can support the service flow. At 1207, the CMTS 1230 sends a dynamic service addition acknowledge (DSA-ACK) message after enabling transmission and reception of data on the new service flow. At 1208, the service flow has been allocated, and transmission on the new service flow has been enabled. At 1209, the network access device 1210 can begin transmitting data upstream to the CMTS 1230 which, as described above, forwards the data to the relevant packet-switched network.
  • Where the packet-switched network also provides for differentiation in service, e.g. based on the “DiffServ” framework, the cable modem [0043] 1220 can mark the Type Of Service (TOS) field of the packet to indicate the service class for the packet. See K. Nichols, S. Blake, F. Baker, D. Black, “Definition of the Differentiated Services Field (DS Field) in the IPv4 and IPv6 Headers,” IETF Network Working Group, RFC 2474 (December 1998); S. Blake, D. Black, M. Carlson, E. Davies, Z. Wang, W. Weiss, “An Architecture for Differentiated Services,” IETF Network Working Group, RFC 2475 (December 1998), which are incorporated by reference herein. Using the policy information received from the PDP 1240, the CMTS 1230 can act as a policy enforcement point and police the packets received from the cable modem 1220 and remark the TOS field of the packet where there is any deviation from the policy specified for the particular subscriber. Similarly, the CMTS 1230 can police service flows in the downstream direction, again based on the policy provided by the PDP 1240.
  • The CMTS [0044] 1230 performs scheduling based on the policies provided by the PDP 1240. Scheduling can be based on differentiation between subscribers to different services or service providers and can also be used to ensure that reserved minimum traffic rate requirements are met (this may require some measurement of capacity allocated to different subscribers as well as an accounting of bandwidth usage). One method of scheduling in the CMTS is to follow class based queuing (CBQ). See S. Floyd, V. Jacobson, “Link-Sharing and Resource Management Models for Packet Networks,” IEEE/ACM Transactions on Networking, Vol. 3, No. 4, August 1995, which is incorporated by reference herein. CBQ allows for support of quality-of-support and flexible link sharing. The mechanism can be used to share capacity of a link across services, protocol families and/or traffic types. It can be used to allocate “shares” to individual service providers and subdivide the share amongst the subscribers of a given service provider. For example, arriving packet flows are aggregated into classes, each class having a “priority” and a throughput allocation. The traditional method is to use the information in the packet header, although it is possible, in the HFC architecture, to classify based on SID and the policy set up at the time the service flow is setup. A hierarchy of classes is constructed, e.g. as depicted in FIG. 13. The access link 1300 is shared between three service providers 1351, 1352, and 1353. Each service provider shares its allocation of link bandwidth among its customers, i.e., 1311, 1312, 1313 being subscribers of service provider 1351; 1321, 1322 being subscribers of 1352; 1331 being a subscriber of service provider 1353. The link scheduler may associate weights for each service provider. The service provider “weight” determines the overall share of access link bandwidth to all subscribers of the service provider, when the link is fully utilized. The link scheduler further allocates weights to each customer of the service provider—the customer's weight determining the share of the service provider's link bandwidth available to the subscriber. It can then be possible to “borrow” bandwidth from other service provider subscribers when the service provider's share is not fully subscribed, as well as from other service providers when the link is not fully loaded. It is advantageous for the scheduling to provide such flexible sharing. When the link is underloaded, there is no need for any regulation of access to the HFC link by active SIDs. The scheduler can regulate a particular customer, e.g. by postponing giving grants to a SID of the customer, only when the customer is over the limit in terms of bandwidth share during the short-term interval.
  • The foregoing Detailed Description is to be understood as being in every respect illustrative and exemplary, but not restrictive, and the scope of the invention disclosed herein is not to be determined from the Detailed Description, but rather from the claims as interpreted according to the full breadth permitted by the patent laws. It is to be understood that the embodiments shown and described herein are only illustrative of the principles of the present invention and that various modifications may be implemented by those skilled in the art without departing from the scope and spirit of the invention. For example, the detailed description describes an embodiment of the invention with particular reference to an HFC access network architecture. However, the principles of the present invention could be readily extended to other access network architectures, such as DSL, wireless, satellite, etc. Such an extension could be readily implemented by one of ordinary skill in the art given the above disclosure. [0045]

Claims (8)

What is claimed is:
1. A method of access control in an access network infrastructure connected to a plurality of service networks, comprising the steps of:
receiving a host configuration protocol message acknowledging allocation of a network address, associated with a service network, to an authenticated network access device;
creating an entry in an address resolution protocol cache using information from the dynamic host configuration protocol message; and
restricting access to the access network infrastructure based on the entries in the address resolution protocol cache.
2. The invention of claim 1 wherein the host configuration protocol is DHCP.
3. The invention of claim 1 wherein the address resolution protocol is ARP.
4. The invention of claim 1 further comprising the step of flushing the entry in the address resolution protocol cache if the network address is released by the network access device.
5. The invention of claim 1 wherein the entry in the address resolution protocol cache has an expiration time set to an expiration time of the network address allocated to the network access device.
6. The invention of claim 1 wherein the service networks utilize the Internet Protocol and wherein the addresses are Internet Protocol addresses.
7. The invention of claim 6 wherein the plurality of service networks are operated by different Internet Service Providers.
8. The invention of claim 6 wherein the plurality of service networks offer access to different Internet Protocol-based services.
US09/813,258 2000-03-20 2001-03-20 Service selection in a shared access network providing access control Abandoned US20020023160A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US19063300P true 2000-03-20 2000-03-20
US19063600P true 2000-03-20 2000-03-20
US09/813,258 US20020023160A1 (en) 2000-03-20 2001-03-20 Service selection in a shared access network providing access control

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US09/813,258 US20020023160A1 (en) 2000-03-20 2001-03-20 Service selection in a shared access network providing access control

Publications (1)

Publication Number Publication Date
US20020023160A1 true US20020023160A1 (en) 2002-02-21

Family

ID=26886284

Family Applications (7)

Application Number Title Priority Date Filing Date
US09/813,258 Abandoned US20020023160A1 (en) 2000-03-20 2001-03-20 Service selection in a shared access network providing access control
US09/812,323 Expired - Fee Related US7065578B2 (en) 2000-03-20 2001-03-20 Service selection in a shared access network using policy routing
US09/812,316 Abandoned US20020019875A1 (en) 2000-03-20 2001-03-20 Service selection in a shared access network
US09/812,443 Abandoned US20020023174A1 (en) 2000-03-20 2001-03-20 Service selection in a shared access network using dynamic host configuration protocol
US09/812,509 Abandoned US20020016855A1 (en) 2000-03-20 2001-03-20 Managed access point for service selection in a shared access network
US09/812,441 Abandoned US20020038419A1 (en) 2000-03-20 2001-03-20 Service selection in a shared access network using tunneling
US09/812,444 Abandoned US20020013844A1 (en) 2000-03-20 2001-03-20 Service selection in a shared access network supporting quality of service

Family Applications After (6)

Application Number Title Priority Date Filing Date
US09/812,323 Expired - Fee Related US7065578B2 (en) 2000-03-20 2001-03-20 Service selection in a shared access network using policy routing
US09/812,316 Abandoned US20020019875A1 (en) 2000-03-20 2001-03-20 Service selection in a shared access network
US09/812,443 Abandoned US20020023174A1 (en) 2000-03-20 2001-03-20 Service selection in a shared access network using dynamic host configuration protocol
US09/812,509 Abandoned US20020016855A1 (en) 2000-03-20 2001-03-20 Managed access point for service selection in a shared access network
US09/812,441 Abandoned US20020038419A1 (en) 2000-03-20 2001-03-20 Service selection in a shared access network using tunneling
US09/812,444 Abandoned US20020013844A1 (en) 2000-03-20 2001-03-20 Service selection in a shared access network supporting quality of service

Country Status (4)

Country Link
US (7) US20020023160A1 (en)
AU (2) AU8725701A (en)
CA (2) CA2403628C (en)
WO (2) WO2001071982A1 (en)

Cited By (49)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20010037395A1 (en) * 2000-03-29 2001-11-01 Transcept Opencell, Inc. Operations and maintenace architecture for multiprotocol distributed system
US20030065787A1 (en) * 2001-09-28 2003-04-03 Hitachi, Ltd. Method to provide data communication service
US20030172170A1 (en) * 2002-03-08 2003-09-11 Johnson Gerald R. Providing multiple ISP access to devices behind NAT
US20040015262A1 (en) * 2002-07-18 2004-01-22 International Business Machines Corporation Method for controlling access to devices in a pervasive embedded environment
US20040045037A1 (en) * 2002-08-27 2004-03-04 Broadcom Corporation Distributed cable modem termination system (CMTS) architecture implementing a media access control chip
US20040045035A1 (en) * 2002-08-27 2004-03-04 Broadcom Corporation Distributed cable modem termination system (CMTS) architecture
US20040045032A1 (en) * 2002-08-27 2004-03-04 Broadcom Corporation MiniMAC implementation of a distributed cable modem termination system (CMTS) architecture
US20040045033A1 (en) * 2002-08-27 2004-03-04 Broadcom Corporation Distributed cable modem termination system (CMTS) architecture implementing a media access control chip
WO2004042999A1 (en) * 2002-11-06 2004-05-21 Telefonaktiebolaget Lm Ericsson (Publ) Method and arrangement for preventing illegitimate use of ip addresses
US20040123329A1 (en) * 2002-12-20 2004-06-24 Chris Williams System and method for detecting and reporting cable modems with duplicate media access control addresses
US20040177276A1 (en) * 2002-10-10 2004-09-09 Mackinnon Richard System and method for providing access control
US20040205762A1 (en) * 2003-02-24 2004-10-14 Kabushiki Kaisha Toshiba Communication control apparatus, communication control method and communication control program product
US20050005154A1 (en) * 2003-07-03 2005-01-06 Andrew Danforth Method to block unauthorized access to TFTP server configuration files
US20050114880A1 (en) * 2003-11-21 2005-05-26 Kenneth Gould System and method for detecting and reporting cable network devices with duplicate media access control addresses
US20050204022A1 (en) * 2004-03-10 2005-09-15 Keith Johnston System and method for network management XML architectural abstraction
US20050204050A1 (en) * 2004-03-10 2005-09-15 Patrick Turley Method and system for controlling network access
US20050204168A1 (en) * 2004-03-10 2005-09-15 Keith Johnston System and method for double-capture/double-redirect to a different location
US20050204402A1 (en) * 2004-03-10 2005-09-15 Patrick Turley System and method for behavior-based firewall modeling
US20060041682A1 (en) * 2000-08-23 2006-02-23 Johnson Jeremy T Sharing IP network resources
US20060114898A1 (en) * 2004-11-30 2006-06-01 Alcatel Method for providing an internet-layer address to a client device
US20060146732A1 (en) * 2005-01-05 2006-07-06 Alcatel Method to configure a DSL connection in which a home IP plug controller is enabled to initialize a communication with a home IP plug
US20060161636A1 (en) * 2005-01-06 2006-07-20 Tellabs Operations, Inc. Method and apparatus for automated discovery of a remote access device address
US20060242294A1 (en) * 2005-04-04 2006-10-26 Damick Jeffrey J Router-host logging
US20070086432A1 (en) * 2005-10-19 2007-04-19 Marco Schneider Methods and apparatus for automated provisioning of voice over internet protocol gateways
US20070086433A1 (en) * 2005-10-19 2007-04-19 Cunetto Philip C Methods and apparatus for allocating shared communication resources to outdial communication services
US20070086439A1 (en) * 2005-10-19 2007-04-19 Marco Schneider Methods and apparatus to perform outdial communication services
US20070116234A1 (en) * 2005-10-19 2007-05-24 Marco Schneider Methods and apparatus for preserving access information during call transfers
US20070115921A1 (en) * 2005-10-19 2007-05-24 Marco Schneider Apparatus and methods for subscriber and enterprise assignments and resource sharing
US20070115922A1 (en) * 2005-10-19 2007-05-24 Marco Schneider Methods, apparatus and data structures for managing distributed communication systems
WO2007062607A1 (en) * 2005-12-03 2007-06-07 Huawei Technologies Co., Ltd. System and method for implement the interconnection of the dsl network and the wireless communication network
EP1833223A1 (en) * 2006-03-08 2007-09-12 Alcatel Lucent Method for inverse port-based authentication
WO2008012471A2 (en) * 2006-07-28 2008-01-31 France Telecom Method of access by a client to a service through a network, by combined used of a dynamic configuration protocol and of a point-to-point protocol, corresponding equipment and computer program
US20080109864A1 (en) * 2002-12-20 2008-05-08 Andrew Danforth System and Method for Detecting and Reporting Cable Modems with Duplicate Media Access Control Addresses
US20080222730A1 (en) * 2007-03-06 2008-09-11 Ford Daniel E Network service monitoring
US7509625B2 (en) 2004-03-10 2009-03-24 Eric White System and method for comprehensive code generation for system management
US7571308B1 (en) * 2000-06-28 2009-08-04 Microsoft Corporation Method for controlling access to a network by a wireless client
US20090210542A1 (en) * 2008-02-19 2009-08-20 Futurewei Technologies, Inc. Simplified protocol for carrying authentication for network access
US7587512B2 (en) 2002-10-16 2009-09-08 Eric White System and method for dynamic bandwidth provisioning
US7590728B2 (en) 2004-03-10 2009-09-15 Eric White System and method for detection of aberrant network behavior by clients of a network access gateway
US7624438B2 (en) 2003-08-20 2009-11-24 Eric White System and method for providing a secure connection between networked computers
US7720044B1 (en) * 2002-04-19 2010-05-18 Nokia Corporation System and method for terminal configuration
US7809806B1 (en) 2001-08-02 2010-10-05 Cisco Technology, Inc. Neighbor discovery using address registration protocol over ELMI
US7839988B2 (en) 2005-10-19 2010-11-23 At&T Intellectual Property I, L.P. Methods and apparatus for data structure driven authorization and/or routing of outdial communication services
US20110023117A1 (en) * 1997-03-05 2011-01-27 Brown Ralph W Method and System for Restricting Access to User Resources
US20110029642A1 (en) * 1997-03-05 2011-02-03 Medin Milo S Delivering Multimedia Services
WO2011130132A1 (en) * 2010-04-16 2011-10-20 Cisco Technology, Inc. System and method for providing prefixes indicative of mobility properties in a network environment
US20110292938A1 (en) * 2010-05-27 2011-12-01 At&T Intellectual Property I, L.P. System and Method of Redirecting Internet Protocol Traffic for Network Based Parental Controls
CN105099941A (en) * 2015-06-19 2015-11-25 杭州华三通信技术有限公司 Message processing method and device
USRE47253E1 (en) 2002-11-06 2019-02-19 Telefonaktiebolaget Lm Ericsson (Publ) Method and arrangement for preventing illegitimate use of IP addresses

Families Citing this family (206)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020022483A1 (en) * 2000-04-18 2002-02-21 Wayport, Inc. Distributed network communication system which allows multiple wireless service providers to share a common network infrastructure
US6842459B1 (en) 2000-04-19 2005-01-11 Serconet Ltd. Network combining wired and non-wired segments
US20010034831A1 (en) * 2000-04-19 2001-10-25 Brustoloni Jose C. Method and apparatus for providing internet access to client computers over a lan
US6842769B1 (en) 2000-05-05 2005-01-11 Interland, Inc. Automatically configured network server
US20020010800A1 (en) * 2000-05-18 2002-01-24 Riley Richard T. Network access control system and method
US7092390B2 (en) * 2000-09-07 2006-08-15 Sbc Technology Resources, Inc. Internal substitution bi-level addressing for compatible public networks
US7487232B1 (en) 2000-09-13 2009-02-03 Fortinet, Inc. Switch management system and method
US8250357B2 (en) 2000-09-13 2012-08-21 Fortinet, Inc. Tunnel interface for securing traffic over a network
US7444398B1 (en) * 2000-09-13 2008-10-28 Fortinet, Inc. System and method for delivering security services
US7389358B1 (en) * 2000-09-13 2008-06-17 Fortinet, Inc. Distributed virtual system to support managed, network-based services
US7272643B1 (en) * 2000-09-13 2007-09-18 Fortinet, Inc. System and method for managing and provisioning virtual routers
US7574495B1 (en) * 2000-09-13 2009-08-11 Fortinet, Inc. System and method for managing interworking communications protocols
KR100402981B1 (en) * 2000-09-29 2003-10-22 엘지전자 주식회사 Apparatus and Method of Managing IP Address in the Exchange
US7088737B1 (en) * 2000-10-27 2006-08-08 Redback Networks Inc. Method and apparatus for combining packets having different protocol encapsulations within a circuit
US7054321B1 (en) * 2000-10-27 2006-05-30 Redback Networks Inc. Tunneling ethernet
US7190686B1 (en) * 2000-12-20 2007-03-13 Cisco Technology, Inc. Self configuring high throughput medium access control for wireless networks
FR2819962B1 (en) * 2001-01-22 2003-06-20 Cit Alcatel of access control gateway has an active network
US6952428B1 (en) * 2001-01-26 2005-10-04 3Com Corporation System and method for a specialized dynamic host configuration protocol proxy in a data-over-cable network
US7444404B2 (en) * 2001-02-05 2008-10-28 Arbor Networks, Inc. Network traffic regulation including consistency based detection and filtering of packets with spoof source addresses
US20020129377A1 (en) * 2001-03-08 2002-09-12 Cloonan Thomas J. Method and apparatus for controlling traffic loading on links between internet service providers and cable modem termination system
US20020162021A1 (en) * 2001-04-30 2002-10-31 Audebert Yves Louis Gabriel Method and system for establishing a remote connection to a personal security device
US7450595B1 (en) * 2001-05-01 2008-11-11 At&T Corp. Method and system for managing multiple networks over a set of ports
US7688828B2 (en) * 2001-06-27 2010-03-30 Cisco Technology, Inc. Downstream remote physical interface for modular cable modem termination system
US7639617B2 (en) * 2001-06-27 2009-12-29 Cisco Technology, Inc. Upstream physical interface for modular cable modem termination system
US7181547B1 (en) * 2001-06-28 2007-02-20 Fortinet, Inc. Identifying nodes in a ring network
US20030009585A1 (en) * 2001-07-06 2003-01-09 Brian Antoine Dynamic policy based routing
US7360245B1 (en) * 2001-07-18 2008-04-15 Novell, Inc. Method and system for filtering spoofed packets in a network
US7134012B2 (en) * 2001-08-15 2006-11-07 International Business Machines Corporation Methods, systems and computer program products for detecting a spoofed source address in IP datagrams
JP4236398B2 (en) * 2001-08-15 2009-03-11 富士通株式会社 COMMUNICATION METHOD, COMMUNICATION SYSTEM AND COMMUNICATION access program
EP2234394A1 (en) 2001-10-11 2010-09-29 Mosaid Technologies Incorporated Coupling device
US7813346B1 (en) * 2001-11-21 2010-10-12 Juniper Networks, Inc. Filter-based forwarding in a network
FI20012338A0 (en) * 2001-11-29 2001-11-29 Stonesoft Corp A firewall for filtering tunneled data packets
US7617317B2 (en) 2001-12-03 2009-11-10 Sprint Spectrum L.P. Method and system for allowing multiple service providers to serve users via a common access network
US7379465B2 (en) * 2001-12-07 2008-05-27 Nortel Networks Limited Tunneling scheme optimized for use in virtual private networks
US20030159072A1 (en) * 2002-02-04 2003-08-21 Atreus Systems Corp. Single sign-on for multiple network -based services
US20080114832A1 (en) * 2003-03-07 2008-05-15 Atreus Systems Corp. Using multiple policy distribution points to initiate a network-based service
CN100431305C (en) * 2002-02-08 2008-11-05 艾利森电话股份有限公司 Method and system ralating service providers to clients in an access network, using dynamically allocated MAC addresses
US8271686B2 (en) * 2002-02-13 2012-09-18 Intellectual Ventures I Llc Transmission of packet data to a wireless terminal
US7844817B2 (en) * 2002-02-28 2010-11-30 Siemens Aktiengesellschaft Ensuring quality of service in a communications network
US20030167338A1 (en) * 2002-03-01 2003-09-04 Globespanvirata Incorporated System and method to provide PPPoE connectivity to non-PPPoE clients
US20030169694A1 (en) * 2002-03-07 2003-09-11 Seaman Michael John Use of alternate ports in spanning tree configured bridged virtual local area networks
US7324515B1 (en) 2002-03-27 2008-01-29 Cisco Technology, Inc. Proxy addressing scheme for cable networks
AU2003219294A1 (en) * 2002-03-27 2003-10-13 British Telecommunications Public Limited Company System for selecting a connectivity mechanism
JP3665622B2 (en) * 2002-03-29 2005-06-29 株式会社東芝 Source address selection system, a router device, the communication node and the source address selection method
US7376125B1 (en) 2002-06-04 2008-05-20 Fortinet, Inc. Service processing switch
US7116665B2 (en) * 2002-06-04 2006-10-03 Fortinet, Inc. Methods and systems for a distributed provider edge
US7161904B2 (en) 2002-06-04 2007-01-09 Fortinet, Inc. System and method for hierarchical metering in a virtual router based network switch
US7177311B1 (en) 2002-06-04 2007-02-13 Fortinet, Inc. System and method for routing traffic through a virtual router-based network switch
US7203192B2 (en) * 2002-06-04 2007-04-10 Fortinet, Inc. Network packet steering
US20040001496A1 (en) * 2002-06-21 2004-01-01 Jon Yusko Method and apparatus for PPP auto-connect
CN1233135C (en) * 2002-06-22 2005-12-21 华为技术有限公司 Method for preventing IP address deceit in dynamic address distribution
US7174376B1 (en) * 2002-06-28 2007-02-06 Cisco Technology, Inc. IP subnet sharing technique implemented without using bridging or routing protocols
US6801528B2 (en) * 2002-07-03 2004-10-05 Ericsson Inc. System and method for dynamic simultaneous connection to multiple service providers
US7243150B2 (en) * 2002-07-10 2007-07-10 Radwin Ltd. Reducing the access delay for transmitting processed data over transmission data
WO2004014045A1 (en) * 2002-07-24 2004-02-12 International Business Machines Corporation Service class dependant asignment of ip addresses for cotrolling access to an d delivery of e-sevices
US7065092B2 (en) * 2002-07-31 2006-06-20 Sbc Properties, L.P. Resource reservation protocol based guaranteed quality of service internet protocol (IP) connections over a switched network using newly assigned IP addresses
US7301951B2 (en) * 2002-07-31 2007-11-27 At&T Knowledge Ventures, L.P. Resource reservation protocol based guaranteed quality of service internet protocol connections over a switched network
US7272145B2 (en) 2002-07-31 2007-09-18 At&T Knowledge Ventures, L.P. Resource reservation protocol based guaranteed quality of service internet protocol connections over a switched network through proxy signaling
US7143435B1 (en) 2002-07-31 2006-11-28 Cisco Technology, Inc. Method and apparatus for registering auto-configured network addresses based on connection authentication
US7298750B2 (en) 2002-07-31 2007-11-20 At&T Knowledge Ventures, L.P. Enhancement of resource reservation protocol enabling short-cut internet protocol connections over a switched network
US7684400B2 (en) 2002-08-08 2010-03-23 Intel Corporation Logarithmic time range-based multifield-correlation packet classification
US7096383B2 (en) * 2002-08-29 2006-08-22 Cosine Communications, Inc. System and method for virtual router failover in a network routing system
US7337224B1 (en) * 2002-10-24 2008-02-26 Cisco Technology, Inc. Method and apparatus providing policy-based determination of network addresses
US7434254B1 (en) * 2002-10-25 2008-10-07 Cisco Technology, Inc. Method and apparatus for automatic filter generation and maintenance
US20050105513A1 (en) * 2002-10-27 2005-05-19 Alan Sullivan Systems and methods for direction of communication traffic
US20060140182A1 (en) * 2004-12-23 2006-06-29 Michael Sullivan Systems and methods for monitoring and controlling communication traffic
US20070291739A1 (en) * 2004-05-04 2007-12-20 Sullivan Alan T Systems and Methods for Direction of Communication Traffic
IL152824A (en) * 2002-11-13 2012-05-31 Mosaid Technologies Inc Addressable outlet and a network using same
US7266120B2 (en) 2002-11-18 2007-09-04 Fortinet, Inc. System and method for hardware accelerated packet multicast in a virtual routing system
US7450501B2 (en) 2002-12-11 2008-11-11 Broadcom Corporation Media processing system based on satellite set top box platform with telephony downstream and upstream data paths
US7475243B2 (en) 2002-12-11 2009-01-06 Broadcom Corporation Preventing a non-head end based service provider from sending media to a media processing system
US9357256B2 (en) 2002-12-11 2016-05-31 Broadcom Corporation Third party media channel access in a media exchange network
US8495180B2 (en) 2002-12-11 2013-07-23 Broadcom Corporation Server architecture supporting a personal media exchange network
US7467227B1 (en) 2002-12-31 2008-12-16 At&T Corp. System using policy filter decision to map data traffic to virtual networks for forwarding the traffic in a regional access network
EP1443736A3 (en) 2003-01-30 2006-01-04 Broadcom Corporation Server architecture supporting a personal media exchange network
US7222173B2 (en) * 2003-02-10 2007-05-22 International Business Machines Corporation Limited knowledge of configuration information of a FICON controller
KR100886551B1 (en) * 2003-02-21 2009-03-02 삼성전자주식회사 Apparatus for traffic flow template packet filtering according to internet protocol version in mobile communication system and method thereof
US20040165600A1 (en) * 2003-02-21 2004-08-26 Alcatel Customer site bridged emulated LAN services via provider provisioned connections
US20040193730A1 (en) * 2003-03-25 2004-09-30 Vernon Stephen K. Method and computer programs for providing special processing of a communication sent across a communication network
US20050027882A1 (en) * 2003-05-05 2005-02-03 Sullivan Alan T. Systems and methods for direction of communication traffic
US7558844B1 (en) * 2003-05-06 2009-07-07 Juniper Networks, Inc. Systems and methods for implementing dynamic subscriber interfaces
US7720002B1 (en) * 2003-07-10 2010-05-18 Juniper Networks, Inc. Systems and methods for initializing cable modems
US7533255B1 (en) * 2003-07-11 2009-05-12 Cisco Technology, Inc. Method and apparatus for restricting address resolution protocol table updates
US7447203B2 (en) 2003-07-29 2008-11-04 At&T Intellectual Property I, L.P. Broadband access for virtual private networks
US7739394B2 (en) * 2003-07-29 2010-06-15 At&T Intellectual Property I, L.P. Bi-level addressing for internet protocol broadband access
US7698455B2 (en) 2003-08-01 2010-04-13 Foundry Networks, Inc. Method for providing scalable multicast service in a virtual private LAN service
US7165111B2 (en) * 2003-08-04 2007-01-16 Sbc Knowledge Ventures, L.P. System and method to identify devices employing point-to-point-over Ethernet encapsulation
US7720095B2 (en) 2003-08-27 2010-05-18 Fortinet, Inc. Heterogeneous media packet bridging
US9596240B2 (en) * 2004-08-30 2017-03-14 Arris Enterprises, Inc. Method and system for layer-3 subscriber login in a cable data network
US8788823B1 (en) * 2003-09-03 2014-07-22 Cisco Technology, Inc. System and method for filtering network traffic
IL157787A (en) 2003-09-07 2010-12-30 Mosaid Technologies Inc Modular outlet for data communications network
DE60304704T2 (en) * 2003-09-18 2007-04-12 Sap Aktiengesellschaft Network system, routers and network setup procedures
US8229888B1 (en) * 2003-10-15 2012-07-24 Radix Holdings, Llc Cross-device playback with synchronization of consumption state
US7653730B1 (en) * 2003-10-30 2010-01-26 Sprint Communications Company L.P. System and method for latency assurance and dynamic re-provisioning of telecommunication connections in a carrier virtual network
US8005112B2 (en) * 2003-12-19 2011-08-23 Teledata Networks, Ltd. Service connection method and architecture
IL159838D0 (en) * 2004-01-13 2004-06-20 Yehuda Binder Information device
KR20050079420A (en) * 2004-02-05 2005-08-10 삼성전자주식회사 Tunnelling sevice method and system thereof
CA2457368C (en) * 2004-02-11 2013-01-08 Solutioninc Limited A server, system and method for providing access to a public network through an internal network of a multi-system operator
IL160417A (en) * 2004-02-16 2011-04-28 Mosaid Technologies Inc Outlet add-on module
JP2005260415A (en) * 2004-03-10 2005-09-22 Matsushita Electric Ind Co Ltd Network repeating device
JP4440265B2 (en) * 2004-03-30 2010-03-24 パナソニック株式会社 Communication system, transmitting device, receiving device, communication method and aircraft content distribution system
EP1596553B1 (en) * 2004-05-11 2016-07-27 Alcatel Lucent Method of providing resources with restricted access
US7835274B2 (en) * 2004-05-25 2010-11-16 Cisco Technology, Inc. Wideband provisioning
US7646786B2 (en) * 2004-05-25 2010-01-12 Cisco Technology, Inc. Neighbor discovery in cable networks
US7630361B2 (en) * 2005-05-20 2009-12-08 Cisco Technology, Inc. Method and apparatus for using data-over-cable applications and services in non-cable environments
US7532627B2 (en) 2004-05-25 2009-05-12 Cisco Technology, Inc. Wideband upstream protocol
US7539208B2 (en) * 2004-05-25 2009-05-26 Cisco Technology, Inc. Timing system for modular cable modem termination system
US8149833B2 (en) * 2004-05-25 2012-04-03 Cisco Technology, Inc. Wideband cable downstream protocol
US7864686B2 (en) 2004-05-25 2011-01-04 Cisco Technology, Inc. Tunneling scheme for transporting information over a cable network
US7817553B2 (en) * 2004-05-25 2010-10-19 Cisco Technology, Inc. Local area network services in a cable modem network
US7720101B2 (en) * 2004-05-25 2010-05-18 Cisco Technology, Inc. Wideband cable modem with narrowband circuitry
US8102854B2 (en) 2004-05-25 2012-01-24 Cisco Technology, Inc. Neighbor discovery proxy with distributed packet inspection scheme
GB2416266A (en) * 2004-07-15 2006-01-18 Siemens Ag Head office and branch office network connections
US7733811B2 (en) * 2004-09-15 2010-06-08 Fujitsu Limited Method and system for bridging traffic in a resilient packet ring network
US7499419B2 (en) 2004-09-24 2009-03-03 Fortinet, Inc. Scalable IP-services enabled multicast forwarding with efficient resource utilization
EP1643710A1 (en) 2004-09-30 2006-04-05 Nagravision S.A. Method of updating a lookup table of addresses and identification numbers
US20060072482A1 (en) * 2004-10-06 2006-04-06 Nokia Corporation Service routing
US20060095546A1 (en) * 2004-10-07 2006-05-04 Nokia Corporation Method and system for locating services in proximity networks for legacy application
US7854000B2 (en) * 2004-10-26 2010-12-14 Cisco Technology, Inc. Method and system for addressing attacks on a computer connected to a network
US7808904B2 (en) 2004-11-18 2010-10-05 Fortinet, Inc. Method and apparatus for managing subscriber profiles
US7342925B2 (en) * 2004-11-30 2008-03-11 At&T Corp. Technique for automated MAC address cloning
US7558866B2 (en) * 2004-12-08 2009-07-07 Microsoft Corporation Method and system for securely provisioning a client device
US7881289B1 (en) * 2004-12-22 2011-02-01 At&T Intellectual Property Ii, L.P. Method and apparatus for porting telephone numbers of endpoint devices
US20060179013A1 (en) * 2005-02-10 2006-08-10 Andre Beliveau Configurable distribution of signals in a network
US7440405B2 (en) * 2005-03-11 2008-10-21 Reti Corporation Apparatus and method for packet forwarding with quality of service and rate control
AT360938T (en) * 2005-03-17 2007-05-15 Alcatel Lucent A method for exchanging data packets
CA2609415A1 (en) * 2005-05-24 2006-11-30 Paxfire, Inc. Enhanced features for direction of communication traffic
US7668195B2 (en) 2005-06-14 2010-02-23 General Instrument Corporation Method and apparatus for transmitting and receiving data over a shared access carrier network
KR101291190B1 (en) 2005-09-15 2013-07-31 삼성전자주식회사 Method for sharing network resources between two network operators
US7606232B1 (en) 2005-11-09 2009-10-20 Juniper Networks, Inc. Dynamic virtual local area network (VLAN) interface configuration
US7649886B2 (en) * 2005-11-21 2010-01-19 Motorola, Inc. Method and system for processing incoming packets in a communication network
US20070162331A1 (en) * 2006-01-10 2007-07-12 Michael Sullivan Systems and methods for providing information and conducting business using the internet
CN101005381B (en) * 2006-01-17 2012-05-02 华为技术有限公司 System and method for realizing flow statistic based user's service on terminal
US7633956B1 (en) 2006-01-19 2009-12-15 Cisco Technology, Inc. System and method for providing support for multipoint L2VPN services in devices without local bridging
CN101371246A (en) 2006-01-20 2009-02-18 派克斯费尔有限公司 Systems and methods for discerning and controlling communication traffic
FR2897736B1 (en) * 2006-02-22 2008-04-11 Viaccess Sa A method of establishing a cryptographic key, and headend receiver for this method, and signal transmission METHOD
US7808994B1 (en) 2006-02-22 2010-10-05 Juniper Networks, Inc. Forwarding traffic to VLAN interfaces built based on subscriber information strings
US7492766B2 (en) * 2006-02-22 2009-02-17 Juniper Networks, Inc. Dynamic building of VLAN interfaces based on subscriber information strings
US7624181B2 (en) * 2006-02-24 2009-11-24 Cisco Technology, Inc. Techniques for authenticating a subscriber for an access network using DHCP
US7853708B2 (en) * 2006-02-24 2010-12-14 Cisco Technology, Inc. Techniques for replacing point to point protocol with dynamic host configuration protocol
CN101496387B (en) 2006-03-06 2012-09-05 思科技术公司 System and method for access authentication in a mobile wireless network
US7715562B2 (en) * 2006-03-06 2010-05-11 Cisco Technology, Inc. System and method for access authentication in a mobile wireless network
US8004973B2 (en) * 2006-04-25 2011-08-23 Citrix Systems, Inc. Virtual inline configuration for a network device
FR2903264B1 (en) * 2006-06-30 2008-09-26 Sagem Comm Method and device for connecting a client device
EP1876799A1 (en) * 2006-07-06 2008-01-09 Swisscom Solutions AG Method and computer system for the exchange of data with a computer
US8107396B1 (en) * 2006-07-24 2012-01-31 Cisco Technology, Inc. Host tracking in a layer 2 IP ethernet network
AT418219T (en) * 2006-08-04 2009-01-15 Alcatel Lucent Device, module and method for routing an access network for
EP1931085B1 (en) * 2006-12-06 2012-07-18 Genexis B.V. Modular network connection equipment
US7725594B2 (en) * 2006-12-29 2010-05-25 Verizon Patent And Licensing Inc. Assigning priority to network traffic at customer premises
EP1973269B1 (en) * 2007-03-22 2013-04-24 PacketFront Software Solutions AB Configuration preprocessor language
EP1973270B1 (en) * 2007-03-22 2018-01-03 PacketFront Software Solutions AB Broadband service delivery
US7822036B2 (en) * 2007-03-27 2010-10-26 Alcatel Lucent Method and system for policy-based routing in a private network-to-network interface protocol based network
AT467962T (en) 2007-05-29 2010-05-15 Packetfront Systems Ab A method of joining VLAN systems to other networks via a router
DE102007029120B4 (en) * 2007-06-25 2010-06-17 Siemens Ag A method for operating a wireless mesh data network having a plurality of network nodes
US20110071997A1 (en) * 2007-07-30 2011-03-24 Sullivan Alan T Systems and methods for direction of communication traffic
US8792339B2 (en) * 2007-08-10 2014-07-29 Arris Enterprises, Inc. Method and system for moving distinctive traffic flows to a different priority service flow
EP2045992A1 (en) * 2007-10-04 2009-04-08 Gemplus A method for accessing a portable device, corresponding portable device, host device and system
AT464733T (en) * 2007-10-12 2010-04-15 Packetfront Systems Ab Configuring routers for dhcp service request
EP2048848B1 (en) * 2007-10-12 2013-12-18 PacketFront Network Products AB Optical data communications
EP2048857A1 (en) * 2007-10-12 2009-04-15 PacketFront Systems AB Method of configuring routers using external servers
US8325674B2 (en) * 2007-10-31 2012-12-04 Alcatel Lucent Method of integrating femtocells in a packet cable multimedia architecture
KR101474840B1 (en) * 2007-11-05 2014-12-19 삼성전자 주식회사 And a method for controlling the UPnP-based network system,
US8179799B2 (en) * 2007-11-30 2012-05-15 Solarwinds Worldwide, Llc Method for partitioning network flows based on their time information
US8601113B2 (en) * 2007-11-30 2013-12-03 Solarwinds Worldwide, Llc Method for summarizing flow information from network devices
US9331919B2 (en) * 2007-11-30 2016-05-03 Solarwinds Worldwide, Llc Method for summarizing flow information of network devices
CN101478576B (en) * 2008-01-03 2012-02-15 华为技术有限公司 Selected service network method, apparatus and system for
US20090201897A1 (en) * 2008-02-11 2009-08-13 Nokia Siemens Networks Oy Classification process involving mobile stations
US8429739B2 (en) 2008-03-31 2013-04-23 Amazon Technologies, Inc. Authorizing communications between computing nodes
WO2009143886A1 (en) * 2008-05-28 2009-12-03 Packetfront Systems Ab Data retrieval in a network of tree structure
US8627061B1 (en) 2008-08-25 2014-01-07 Apriva, Llc Method and system for employing a fixed IP address based encryption device in a dynamic IP address based network
US8199348B2 (en) * 2008-11-03 2012-06-12 Sharp Laboratories Of America, Inc. Methods and systems for handling files for MFPS utilizing external services
US8406748B2 (en) 2009-01-28 2013-03-26 Headwater Partners I Llc Adaptive ambient services
US8832777B2 (en) 2009-03-02 2014-09-09 Headwater Partners I Llc Adapting network policies based on device service processor configuration
US8402111B2 (en) 2009-01-28 2013-03-19 Headwater Partners I, Llc Device assisted services install
US10248996B2 (en) 2009-01-28 2019-04-02 Headwater Research Llc Method for operating a wireless end-user device mobile payment agent
US10200541B2 (en) 2009-01-28 2019-02-05 Headwater Research Llc Wireless end-user device with divided user space/kernel space traffic policy system
US9572019B2 (en) 2009-01-28 2017-02-14 Headwater Partners LLC Service selection set published to device agent with on-device service selection
US10264138B2 (en) 2009-01-28 2019-04-16 Headwater Research Llc Mobile device and service management
US9706061B2 (en) 2009-01-28 2017-07-11 Headwater Partners I Llc Service design center for device assisted services
US8589541B2 (en) 2009-01-28 2013-11-19 Headwater Partners I Llc Device-assisted services for protecting network capacity
WO2010088957A1 (en) * 2009-02-05 2010-08-12 Telefonaktiebolaget Lm Ericsson (Publ) Host identity protocol server address configuration
US20120023562A1 (en) * 2010-07-26 2012-01-26 David Harp Systems and methods to route network communications for network-based services
US9886315B2 (en) * 2010-08-27 2018-02-06 Ebay Inc. Identity and semaphore-based quality of service
US8923133B2 (en) * 2010-12-27 2014-12-30 Symbol Technologies, Inc. Detection of unauthorized changes to an address resolution protocol cache in a communication network
EP2645641A4 (en) * 2011-04-21 2014-12-03 Nec Corp Communication system, control device, communication method, and program
US9148776B1 (en) * 2011-09-28 2015-09-29 Pulse Secure, Llc Network address preservation in mobile networks
US8965362B1 (en) * 2011-11-21 2015-02-24 Wichorus Methods and apparatus for prefix filtering of international mobile subscriber identity (IMSI) wildcard application
US8719344B2 (en) * 2011-12-20 2014-05-06 Cisco Technology, Inc. Flexible address provisioning across subnets and VRFs
US8750122B1 (en) * 2012-03-22 2014-06-10 Avaya, Inc. Method and apparatus for layer 2 loop prevention in a multi-node switch cluster
US20140215034A1 (en) * 2013-01-29 2014-07-31 Huawei Device Co., Ltd. Processing Method and Processing Device for Automatically Setting Internet Access Mode
US9634940B2 (en) 2013-01-31 2017-04-25 Mellanox Technologies, Ltd. Adaptive routing using inter-switch notifications
US20140281497A1 (en) * 2013-03-13 2014-09-18 General Instrument Corporation Online personalization update system for externally acquired keys
WO2014159862A1 (en) 2013-03-14 2014-10-02 Headwater Partners I Llc Automated credential porting for mobile devices
EP2790386A1 (en) * 2013-04-10 2014-10-15 Alcatel Lucent Method of managing wired connections and connection manager
US9548960B2 (en) * 2013-10-06 2017-01-17 Mellanox Technologies Ltd. Simplified packet routing
KR101502490B1 (en) * 2013-10-18 2015-03-13 주식회사 케이티 Subscibe terminal and security farm node for monitoring network traffic
US9729473B2 (en) 2014-06-23 2017-08-08 Mellanox Technologies, Ltd. Network high availability using temporary re-routing
US9806994B2 (en) 2014-06-24 2017-10-31 Mellanox Technologies, Ltd. Routing via multiple paths with efficient traffic distribution
US9912563B2 (en) * 2014-07-22 2018-03-06 International Business Machines Corporation Traffic engineering of cloud services
US9699067B2 (en) 2014-07-22 2017-07-04 Mellanox Technologies, Ltd. Dragonfly plus: communication over bipartite node groups connected by a mesh network
US9516700B1 (en) 2014-09-25 2016-12-06 Google Inc. Cloud-based controller for managing access points
US9894005B2 (en) 2015-03-31 2018-02-13 Mellanox Technologies, Ltd. Adaptive routing controlled by source node
US9769115B2 (en) * 2015-04-24 2017-09-19 Fortinet, Inc. DHCP agent assisted routing and access control
US9973435B2 (en) 2015-12-16 2018-05-15 Mellanox Technologies Tlv Ltd. Loopback-free adaptive routing
US10178029B2 (en) 2016-05-11 2019-01-08 Mellanox Technologies Tlv Ltd. Forwarding of adaptive routing notifications
US10200294B2 (en) 2016-12-22 2019-02-05 Mellanox Technologies Tlv Ltd. Adaptive routing based on flow-control credits

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6023724A (en) * 1997-09-26 2000-02-08 3Com Corporation Apparatus and methods for use therein for an ISDN LAN modem that displays fault information to local hosts through interception of host DNS request messages
US6073178A (en) * 1996-12-09 2000-06-06 Sun Microsystems, Inc. Method and apparatus for assignment of IP addresses
US6240091B1 (en) * 1997-07-14 2001-05-29 Nokia Telecommunications Oy Implementation of access service
US20010019557A1 (en) * 1997-01-17 2001-09-06 Scientific-Atlanta, Inc Methods for dynamically assigning link addresses and logical network addresses
US20010044893A1 (en) * 2000-01-07 2001-11-22 Tropic Networks Onc. Distributed subscriber management system
US6396845B1 (en) * 1997-04-25 2002-05-28 Nec Corporation Hierarchically interconnected routers for exclusively polling low activity network nodes to reduce polling traffic
US20020165972A1 (en) * 1999-06-23 2002-11-07 Herman Chien Methods and apparatus for use in reducing traffic over a communication link used by a computer network
US6603758B1 (en) * 1999-10-01 2003-08-05 Webtv Networks, Inc. System for supporting multiple internet service providers on a single network
US6657991B1 (en) * 1998-12-21 2003-12-02 3Com Corporation Method and system for provisioning network addresses in a data-over-cable system
US6697862B1 (en) * 1999-05-21 2004-02-24 3Com Corporation System and method for network address maintenance using dynamic host configuration protocol messages in a data-over-cable system

Family Cites Families (75)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US466964A (en) * 1892-01-12 Willis s
US5500860A (en) * 1991-06-14 1996-03-19 Digital Equipment Corporation Router using multiple hop redirect messages to enable bridge like data forwarding
AU7210894A (en) * 1993-06-25 1995-01-17 Xircom, Inc. Virtual carrier detection for wireless local area network with distributed control
US5325362A (en) * 1993-09-29 1994-06-28 Sun Microsystems, Inc. Scalable and efficient intra-domain tunneling mobile-IP scheme
US5633865A (en) * 1995-03-31 1997-05-27 Netvantage Apparatus for selectively transferring data packets between local area networks
US5737328A (en) * 1995-10-04 1998-04-07 Aironet Wireless Communications, Inc. Network communication system with information rerouting capabilities
US6091725A (en) * 1995-12-29 2000-07-18 Cisco Systems, Inc. Method for traffic management, traffic prioritization, access control, and packet forwarding in a datagram computer network
US5959990A (en) * 1996-03-12 1999-09-28 Bay Networks, Inc. VLAN frame format
US5918019A (en) * 1996-07-29 1999-06-29 Cisco Technology, Inc. Virtual dial-up protocol for network communication
US5914938A (en) * 1996-11-19 1999-06-22 Bay Networks, Inc. MAC address table search unit
SE511236C2 (en) * 1996-11-29 1999-08-30 Ericsson Telefon Ab L M A modem with IP support
US5991292A (en) * 1997-03-06 1999-11-23 Nortel Networks Corporation Network access in multi-service environment
US6608832B2 (en) * 1997-09-25 2003-08-19 Telefonaktiebolaget Lm Ericsson Common access between a mobile communications network and an external network with selectable packet-switched and circuit-switched and circuit-switched services
US6029203A (en) * 1997-09-26 2000-02-22 3Com Corporation Apparatus and methods for use therein for an ISDN LAN modem that provides enhanced network activity
DE19742681C2 (en) * 1997-09-26 2003-03-06 Ericsson Telefon Ab L M GPRS subscriber selection of multiple Internet service providers
US6512754B2 (en) 1997-10-14 2003-01-28 Lucent Technologies Inc. Point-to-point protocol encapsulation in ethernet frame
US6092110A (en) * 1997-10-23 2000-07-18 At&T Wireless Svcs. Inc. Apparatus for filtering packets using a dedicated processor
JP4399109B2 (en) * 1997-11-03 2010-01-13 ブリティッシュ・テレコミュニケーションズ・パブリック・リミテッド・カンパニーBritish Telecommunications Public Limited Company Packet network
US6484210B1 (en) * 1997-11-10 2002-11-19 General Instrument Corporation Packet processing relay agent to provide link layer forwarding in one-way cable/wireless/satellite modems
US6009103A (en) * 1997-12-23 1999-12-28 Mediaone Group, Inc. Method and system for automatic allocation of resources in a network
US6535493B1 (en) * 1998-01-15 2003-03-18 Symbol Technologies, Inc. Mobile internet communication protocol
EP1112544A4 (en) * 1998-07-20 2007-05-02 Easynet Access Inc Internet billing
US6058421A (en) * 1998-02-04 2000-05-02 3Com Corporation Method and system for addressing network host interfaces from a cable modem using DHCP
US6006272A (en) * 1998-02-23 1999-12-21 Lucent Technologies Inc. Method for network address translation
US6353614B1 (en) * 1998-03-05 2002-03-05 3Com Corporation Method and protocol for distributed network address translation
US6154776A (en) * 1998-03-20 2000-11-28 Sun Microsystems, Inc. Quality of service allocation on a network
US6831914B1 (en) * 1998-03-27 2004-12-14 Verizon Services Corp. Services control point selection in an advanced intelligent network
US6556584B1 (en) * 1998-04-06 2003-04-29 Motorola, Inc. System and method of communicating non-standardized addresses over a standardized carrier network
US6173316B1 (en) 1998-04-08 2001-01-09 Geoworks Corporation Wireless communication device with markup language based man-machine interface
US6195705B1 (en) * 1998-06-30 2001-02-27 Cisco Technology, Inc. Mobile IP mobility agent standby protocol
US6707818B1 (en) * 1999-03-17 2004-03-16 Broadcom Corporation Network switch memory interface configuration
US6385169B1 (en) * 1998-07-29 2002-05-07 Lucent Technologies Inc. Allocation of bandwidth in a packet switched network among subscribers of a service provider
US6438100B1 (en) * 1998-08-07 2002-08-20 Alcatel Canada Inc. Method and apparatus for routing server redundancy in a network having carrier scale internetworking
US6182228B1 (en) * 1998-08-17 2001-01-30 International Business Machines Corporation System and method for very fast IP packet filtering
US6442588B1 (en) * 1998-08-20 2002-08-27 At&T Corp. Method of administering a dynamic filtering firewall
US6735190B1 (en) * 1998-10-21 2004-05-11 Lucent Technologies Inc. Packet transport method device utilizing header removal fields
US6263369B1 (en) 1998-10-30 2001-07-17 Cisco Technology, Inc. Distributed architecture allowing local user authentication and authorization
US6490289B1 (en) * 1998-11-03 2002-12-03 Cisco Technology, Inc. Multiple network connections from a single PPP link with network address translation
US6427174B1 (en) * 1998-11-12 2002-07-30 Cisco Technology, Inc. Dynamic IP addressing and quality of service assurance
US6651105B1 (en) * 1998-11-12 2003-11-18 International Business Machines Corporation Method for seamless networking support for mobile devices using serial communications
US6427170B1 (en) * 1998-12-08 2002-07-30 Cisco Technology, Inc. Integrated IP address management
US6636894B1 (en) * 1998-12-08 2003-10-21 Nomadix, Inc. Systems and methods for redirecting users having transparent computer access to a network using a gateway device having redirection capability
US6789118B1 (en) * 1999-02-23 2004-09-07 Alcatel Multi-service network switch with policy based routing
US6434627B1 (en) * 1999-03-15 2002-08-13 Cisco Technology, Inc. IP network for accomodating mobile users with incompatible network addressing
US7349391B2 (en) * 1999-03-19 2008-03-25 F5 Networks, Inc. Tunneling between a bus and a network
US6393484B1 (en) * 1999-04-12 2002-05-21 International Business Machines Corp. System and method for controlled access to shared-medium public and semi-public internet protocol (IP) networks
US6553028B1 (en) * 1999-04-30 2003-04-22 Cisco Technology, Inc. Method and apparatus for multicast switching using a centralized switching engine
US6553423B1 (en) * 1999-05-27 2003-04-22 Cisco Technology, Inc. Method and apparatus for dynamic exchange of capabilities between adjacent/neighboring networks nodes
US6708187B1 (en) * 1999-06-10 2004-03-16 Alcatel Method for selective LDAP database synchronization
US6466964B1 (en) * 1999-06-15 2002-10-15 Cisco Technology, Inc. Methods and apparatus for providing mobility of a node that does not support mobility
US6577628B1 (en) * 1999-06-30 2003-06-10 Sun Microsystems, Inc. Providing quality of service (QoS) in a network environment in which client connections are maintained for limited periods of time
US6628654B1 (en) * 1999-07-01 2003-09-30 Cisco Technology, Inc. Dispatching packets from a forwarding agent using tag switching
US6650641B1 (en) * 1999-07-02 2003-11-18 Cisco Technology, Inc. Network address translation using a forwarding agent
US6584071B1 (en) * 1999-08-03 2003-06-24 Lucent Technologies Inc. Routing with service level guarantees between ingress-egress points in a packet network
US6523066B1 (en) * 1999-08-23 2003-02-18 Harris-Exigent, Inc. Dynamic distributed memory locking in a computer network
US6523068B1 (en) * 1999-08-27 2003-02-18 3Com Corporation Method for encapsulating and transmitting a message includes private and forwarding network addresses with payload to an end of a tunneling association
US6553568B1 (en) * 1999-09-29 2003-04-22 3Com Corporation Methods and systems for service level agreement enforcement on a data-over cable system
US6510144B1 (en) * 1999-12-07 2003-01-21 Cisco Technology, Inc. Network layer support to enhance the transport layer performance in mobile and wireless environments
US6879593B1 (en) * 1999-12-20 2005-04-12 Intel Corporation Connections of nodes on different networks
US6598083B1 (en) * 1999-12-30 2003-07-22 Intel Corporation System and method for communicating over a non-continuous connection with a device on a network
JP2001216987A (en) * 2000-01-31 2001-08-10 Honda Motor Co Ltd Humidifying system for fuel cell
US6678273B1 (en) * 2000-02-10 2004-01-13 Semaphore Corporation Managed private network system
US6725264B1 (en) * 2000-02-17 2004-04-20 Cisco Technology, Inc. Apparatus and method for redirection of network management messages in a cluster of network devices
US6574214B1 (en) * 2000-05-25 2003-06-03 Nortel Networks Limited Reduced overhead tunneling techniques in a communications network having mobile foreign agents
US6769127B1 (en) * 2000-06-16 2004-07-27 Minerva Networks, Inc. Method and system for delivering media services and application over networks
US6633761B1 (en) 2000-08-11 2003-10-14 Reefedge, Inc. Enabling seamless user mobility in a short-range wireless networking environment
KR100353892B1 (en) * 2001-02-19 2002-09-28 주식회사 파워콤 A Multi Internet Service Provider System and a Method
US7079520B2 (en) * 2001-12-28 2006-07-18 Cisco Technology, Inc. Methods and apparatus for implementing NAT traversal in mobile IP
US7224687B2 (en) * 2002-02-28 2007-05-29 Lucent Technologies Inc. Method and apparatus for voice over IP network address translation
US6464210B1 (en) * 2002-03-22 2002-10-15 Agrimond, Llc Fluid dissolution apparatus
US7587498B2 (en) * 2002-05-06 2009-09-08 Cisco Technology, Inc. Methods and apparatus for mobile IP dynamic home agent allocation
US6865184B2 (en) * 2003-03-10 2005-03-08 Cisco Technology, Inc. Arrangement for traversing an IPv4 network by IPv6 mobile nodes
US7505432B2 (en) * 2003-04-28 2009-03-17 Cisco Technology, Inc. Methods and apparatus for securing proxy Mobile IP
US20040260752A1 (en) * 2003-06-19 2004-12-23 Cisco Technology, Inc. Methods and apparatus for optimizing resource management in CDMA2000 wireless IP networks
KR100744530B1 (en) * 2003-09-17 2007-08-01 한국전자통신연구원 Apparatus and method for providing a real-time connection traceback using connection redirection technique

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6073178A (en) * 1996-12-09 2000-06-06 Sun Microsystems, Inc. Method and apparatus for assignment of IP addresses
US20010019557A1 (en) * 1997-01-17 2001-09-06 Scientific-Atlanta, Inc Methods for dynamically assigning link addresses and logical network addresses
US6396845B1 (en) * 1997-04-25 2002-05-28 Nec Corporation Hierarchically interconnected routers for exclusively polling low activity network nodes to reduce polling traffic
US6240091B1 (en) * 1997-07-14 2001-05-29 Nokia Telecommunications Oy Implementation of access service
US6023724A (en) * 1997-09-26 2000-02-08 3Com Corporation Apparatus and methods for use therein for an ISDN LAN modem that displays fault information to local hosts through interception of host DNS request messages
US6657991B1 (en) * 1998-12-21 2003-12-02 3Com Corporation Method and system for provisioning network addresses in a data-over-cable system
US6697862B1 (en) * 1999-05-21 2004-02-24 3Com Corporation System and method for network address maintenance using dynamic host configuration protocol messages in a data-over-cable system
US20020165972A1 (en) * 1999-06-23 2002-11-07 Herman Chien Methods and apparatus for use in reducing traffic over a communication link used by a computer network
US6603758B1 (en) * 1999-10-01 2003-08-05 Webtv Networks, Inc. System for supporting multiple internet service providers on a single network
US20010044893A1 (en) * 2000-01-07 2001-11-22 Tropic Networks Onc. Distributed subscriber management system

Cited By (117)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120096118A1 (en) * 1997-03-05 2012-04-19 Medin Milo S Delivering Multimedia Services
US8364848B2 (en) * 1997-03-05 2013-01-29 At Home Bondholders' Liquidating Trust Delivering multimedia services
US20110023117A1 (en) * 1997-03-05 2011-01-27 Brown Ralph W Method and System for Restricting Access to User Resources
US8631474B2 (en) 1997-03-05 2014-01-14 At Home Bondholders' Liquidating Trust Method and system for restricting access to user resources
US20110029642A1 (en) * 1997-03-05 2011-02-03 Medin Milo S Delivering Multimedia Services
US8209427B2 (en) 1997-03-05 2012-06-26 At Home Bondholders' Liquidating Trust Method and system for restricting access to user resources
US9038145B2 (en) 1997-03-05 2015-05-19 At Home Bondholders' Liquidating Trust Method and system for restricting access to user resources
US8103799B2 (en) 1997-03-05 2012-01-24 At Home Bondholders' Liquidating Trust Delivering multimedia services
US9668142B2 (en) 2000-03-29 2017-05-30 Commscope Technologies Llc Operations and maintenance architecture for multiprotocol distributed system
US7991903B2 (en) 2000-03-29 2011-08-02 Lgc Wireless, Inc. Operations and maintenance architecture for multiprotocol distributed system
US8762510B2 (en) 2000-03-29 2014-06-24 Adc Telecommunications, Inc. Operations and maintenance architecture for multiprotocol distributed system
US20080132273A1 (en) * 2000-03-29 2008-06-05 Adc Wireless Solutions Llc Operations and maintenance architecture for multiprotocol distributed system
US20010037395A1 (en) * 2000-03-29 2001-11-01 Transcept Opencell, Inc. Operations and maintenace architecture for multiprotocol distributed system
US7313626B2 (en) * 2000-03-29 2007-12-25 Adc Wireless Solutions Llc Operations and maintenace architecture for multiprotocol distributed system
US7571308B1 (en) * 2000-06-28 2009-08-04 Microsoft Corporation Method for controlling access to a network by a wireless client
US20060041682A1 (en) * 2000-08-23 2006-02-23 Johnson Jeremy T Sharing IP network resources
US8463920B2 (en) * 2000-08-23 2013-06-11 At Home Bondholders' Liquidating Trust Sharing IP network resources
US8667097B2 (en) 2001-08-02 2014-03-04 Cisco Technology, Inc. Neighbor discovery using address registration protocol over ELMI
US20110019590A1 (en) * 2001-08-02 2011-01-27 Cisco Technology, Inc. Neighbor discovery using address registration protocol over elmi
US9807033B2 (en) 2001-08-02 2017-10-31 Cisco Technology, Inc. Neighbor discovery using address registration protocol over ELMI
US7809806B1 (en) 2001-08-02 2010-10-05 Cisco Technology, Inc. Neighbor discovery using address registration protocol over ELMI
US20030065787A1 (en) * 2001-09-28 2003-04-03 Hitachi, Ltd. Method to provide data communication service
US20030172170A1 (en) * 2002-03-08 2003-09-11 Johnson Gerald R. Providing multiple ISP access to devices behind NAT
US7720044B1 (en) * 2002-04-19 2010-05-18 Nokia Corporation System and method for terminal configuration
US20040015262A1 (en) * 2002-07-18 2004-01-22 International Business Machines Corporation Method for controlling access to devices in a pervasive embedded environment
US20040045032A1 (en) * 2002-08-27 2004-03-04 Broadcom Corporation MiniMAC implementation of a distributed cable modem termination system (CMTS) architecture
US20040045033A1 (en) * 2002-08-27 2004-03-04 Broadcom Corporation Distributed cable modem termination system (CMTS) architecture implementing a media access control chip
US20040045037A1 (en) * 2002-08-27 2004-03-04 Broadcom Corporation Distributed cable modem termination system (CMTS) architecture implementing a media access control chip
US7551610B2 (en) * 2002-08-27 2009-06-23 Broadcom Corporation MiniMAC implementation of a distributed cable modem termination system (CMTS) architecture
US20040045035A1 (en) * 2002-08-27 2004-03-04 Broadcom Corporation Distributed cable modem termination system (CMTS) architecture
US8484695B2 (en) 2002-10-10 2013-07-09 Rpx Corporation System and method for providing access control
US8117639B2 (en) 2002-10-10 2012-02-14 Rocksteady Technologies, Llc System and method for providing access control
US20040177276A1 (en) * 2002-10-10 2004-09-09 Mackinnon Richard System and method for providing access control
US7587512B2 (en) 2002-10-16 2009-09-08 Eric White System and method for dynamic bandwidth provisioning
USRE45445E1 (en) 2002-11-06 2015-03-31 Telefonaktiebolaget L M Ericsson (Publ) Method and arrangement for preventing illegitimate use of IP addresses
EP2472823A1 (en) 2002-11-06 2012-07-04 Telefonaktiebolaget L M Ericsson AB (Publ) A method and a device in an IP network
WO2004042999A1 (en) * 2002-11-06 2004-05-21 Telefonaktiebolaget Lm Ericsson (Publ) Method and arrangement for preventing illegitimate use of ip addresses
EP2472824A1 (en) 2002-11-06 2012-07-04 Telefonaktiebolaget L M Ericsson (publ) A method and a device in an IP network
US7996537B2 (en) 2002-11-06 2011-08-09 Telefonaktiebolaget L M Ericsson (Publ) Method and arrangement for preventing illegitimate use of IP addresses
USRE47253E1 (en) 2002-11-06 2019-02-19 Telefonaktiebolaget Lm Ericsson (Publ) Method and arrangement for preventing illegitimate use of IP addresses
US20080109864A1 (en) * 2002-12-20 2008-05-08 Andrew Danforth System and Method for Detecting and Reporting Cable Modems with Duplicate Media Access Control Addresses
US8260941B2 (en) 2002-12-20 2012-09-04 Time Warner Cable, Inc. System and method for detecting and reporting cable modems with duplicate media access control addresses
US20040123329A1 (en) * 2002-12-20 2004-06-24 Chris Williams System and method for detecting and reporting cable modems with duplicate media access control addresses
US7272846B2 (en) * 2002-12-20 2007-09-18 Time Warner Cable, A Division Of Time Warner Entertainment Company, Lp System and method for detecting and reporting cable modems with duplicate media access control addresses
US20040205762A1 (en) * 2003-02-24 2004-10-14 Kabushiki Kaisha Toshiba Communication control apparatus, communication control method and communication control program product
US20080159283A1 (en) * 2003-02-24 2008-07-03 Kabushiki Kaisha Toshiba Communication control apparatus, communication control method and communication control program product
US7366785B2 (en) * 2003-02-24 2008-04-29 Kabushiki Kaisha Toshiba Communication control apparatus, communication control method and communication control program product
US20080165682A1 (en) * 2003-02-24 2008-07-10 Kabushiki Kaisha Toshiba Communication control apparatus, communication control method and communication control program product
US7293282B2 (en) 2003-07-03 2007-11-06 Time Warner Cable, Inc. Method to block unauthorized access to TFTP server configuration files
US20050005154A1 (en) * 2003-07-03 2005-01-06 Andrew Danforth Method to block unauthorized access to TFTP server configuration files
US8429725B2 (en) 2003-08-20 2013-04-23 Rpx Corporation System and method for providing a secure connection between networked computers
US7624438B2 (en) 2003-08-20 2009-11-24 Eric White System and method for providing a secure connection between networked computers
US8381273B2 (en) 2003-08-20 2013-02-19 Rpx Corporation System and method for providing a secure connection between networked computers
US20090070800A1 (en) * 2003-11-21 2009-03-12 Kenneth Gould System and Method for Detecting and Reporting Cable Network Devices with Duplicate Media Access Control Addresses
US7895665B2 (en) 2003-11-21 2011-02-22 Time Warner Cable, A Division Of Time Warner Entertainment Company, L.P. System and method for detecting and reporting cable network devices with duplicate media access control addresses
US20050114880A1 (en) * 2003-11-21 2005-05-26 Kenneth Gould System and method for detecting and reporting cable network devices with duplicate media access control addresses
US7512969B2 (en) 2003-11-21 2009-03-31 Time Warner Cable, A Division Of Time Warner Entertainment Company, L.P. System and method for detecting and reporting cable network devices with duplicate media access control addresses
US20090059809A1 (en) * 2003-11-21 2009-03-05 Kenneth Gould System and Method for Detecting and Reporting Cable Network Devices with Duplicate Media Access Control Addresses
US7713309B2 (en) 2003-11-21 2010-05-11 Time Warner Cable, A Division Of Time Warner Entertainment Company, L.P. System and method for detecting and reporting cable network devices with duplicate media access control addresses
US20090300177A1 (en) * 2004-03-10 2009-12-03 Eric White System and Method For Detection of Aberrant Network Behavior By Clients of a Network Access Gateway
US7665130B2 (en) 2004-03-10 2010-02-16 Eric White System and method for double-capture/double-redirect to a different location
US20050204402A1 (en) * 2004-03-10 2005-09-15 Patrick Turley System and method for behavior-based firewall modeling
US7509625B2 (en) 2004-03-10 2009-03-24 Eric White System and method for comprehensive code generation for system management
US20050204050A1 (en) * 2004-03-10 2005-09-15 Patrick Turley Method and system for controlling network access
US7610621B2 (en) 2004-03-10 2009-10-27 Eric White System and method for behavior-based firewall modeling
US8019866B2 (en) 2004-03-10 2011-09-13 Rocksteady Technologies, Llc System and method for detection of aberrant network behavior by clients of a network access gateway
US8543710B2 (en) 2004-03-10 2013-09-24 Rpx Corporation Method and system for controlling network access
US20110219444A1 (en) * 2004-03-10 2011-09-08 Patrick Turley Dynamically adaptive network firewalls and method, system and computer program product implementing same
US7590728B2 (en) 2004-03-10 2009-09-15 Eric White System and method for detection of aberrant network behavior by clients of a network access gateway
US8543693B2 (en) 2004-03-10 2013-09-24 Rpx Corporation System and method for detection of aberrant network behavior by clients of a network access gateway
US8397282B2 (en) 2004-03-10 2013-03-12 Rpx Corporation Dynamically adaptive network firewalls and method, system and computer program product implementing same
US20050204168A1 (en) * 2004-03-10 2005-09-15 Keith Johnston System and method for double-capture/double-redirect to a different location
US20050204022A1 (en) * 2004-03-10 2005-09-15 Keith Johnston System and method for network management XML architectural abstraction
US20060114898A1 (en) * 2004-11-30 2006-06-01 Alcatel Method for providing an internet-layer address to a client device
US20060146732A1 (en) * 2005-01-05 2006-07-06 Alcatel Method to configure a DSL connection in which a home IP plug controller is enabled to initialize a communication with a home IP plug
EP1679829A1 (en) * 2005-01-05 2006-07-12 Alcatel Alsthom Compagnie Generale D'electricite Method to configure a DSL connection in which a home IP plug controller is enabled to initialize a communication with a home IP plug
US20060161636A1 (en) * 2005-01-06 2006-07-20 Tellabs Operations, Inc. Method and apparatus for automated discovery of a remote access device address
US20060242294A1 (en) * 2005-04-04 2006-10-26 Damick Jeffrey J Router-host logging
US9438683B2 (en) * 2005-04-04 2016-09-06 Aol Inc. Router-host logging
US8693651B2 (en) 2005-10-19 2014-04-08 At&T Intellectual Property I, L.P. Methods and apparatus for authorization and/or routing of outdial communication services
US7782842B2 (en) 2005-10-19 2010-08-24 At&T Intellectual Property I, L.P. Methods and apparatus to perform outdial communication services
US7830867B2 (en) 2005-10-19 2010-11-09 At&T Intellectual Property I, L.P. Methods and apparatus to authorize and allocate resources for outdial communication services
US7839988B2 (en) 2005-10-19 2010-11-23 At&T Intellectual Property I, L.P. Methods and apparatus for data structure driven authorization and/or routing of outdial communication services
US7630360B2 (en) 2005-10-19 2009-12-08 At&T Intellectual Property I, Lp Methods and apparatus to perform outdial facsimile services
US7924987B2 (en) 2005-10-19 2011-04-12 At&T Intellectual Property I., L.P. Methods, apparatus and data structures for managing distributed communication systems
US7643472B2 (en) 2005-10-19 2010-01-05 At&T Intellectual Property I, Lp Methods and apparatus for authorizing and allocating outdial communication services
US20070086432A1 (en) * 2005-10-19 2007-04-19 Marco Schneider Methods and apparatus for automated provisioning of voice over internet protocol gateways
US20070086433A1 (en) * 2005-10-19 2007-04-19 Cunetto Philip C Methods and apparatus for allocating shared communication resources to outdial communication services
US20070086439A1 (en) * 2005-10-19 2007-04-19 Marco Schneider Methods and apparatus to perform outdial communication services
US8238327B2 (en) 2005-10-19 2012-08-07 At&T Intellectual Property I, L.P. Apparatus and methods for subscriber and enterprise assignments and resource sharing
US20070115921A1 (en) * 2005-10-19 2007-05-24 Marco Schneider Apparatus and methods for subscriber and enterprise assignments and resource sharing
US20070116234A1 (en) * 2005-10-19 2007-05-24 Marco Schneider Methods and apparatus for preserving access information during call transfers
US20070115922A1 (en) * 2005-10-19 2007-05-24 Marco Schneider Methods, apparatus and data structures for managing distributed communication systems
US20070115924A1 (en) * 2005-10-19 2007-05-24 Marco Schneider Methods and apparatus for authorizing and allocating outdial communication services
US8396198B2 (en) 2005-10-19 2013-03-12 At&T Intellectual Property I, L.P. Methods and apparatus for authorization and/or routing of outdial communication services
US20110044439A1 (en) * 2005-10-19 2011-02-24 Marco Schneider Methods and apparatus for authorization and/or routing of outdial communication services
WO2007062607A1 (en) * 2005-12-03 2007-06-07 Huawei Technologies Co., Ltd. System and method for implement the interconnection of the dsl network and the wireless communication network
US8027321B2 (en) 2005-12-03 2011-09-27 Huawei Technologies Co., Ltd. Method and system for interconnecting digital subscriber line network and radio communication network
US20090003296A1 (en) * 2005-12-03 2009-01-01 Huawei Technologies Co., Ltd. Method And System For Interconnecting Digital Subscriber Line Network And Radio Communication Network
EP1833223A1 (en) * 2006-03-08 2007-09-12 Alcatel Lucent Method for inverse port-based authentication
US8301115B1 (en) 2006-03-08 2012-10-30 Alcatel Lucent Method for inverse port-based authentication
FR2904503A1 (en) * 2006-07-28 2008-02-01 France Telecom Method for access by a customer service through a network, for use combined with a dynamic configuration protocol and a protocol point point equipment and corresponding computer program
WO2008012471A2 (en) * 2006-07-28 2008-01-31 France Telecom Method of access by a client to a service through a network, by combined used of a dynamic configuration protocol and of a point-to-point protocol, corresponding equipment and computer program
WO2008012471A3 (en) * 2006-07-28 2008-03-20 Jean Paul Blanc Method of access by a client to a service through a network, by combined used of a dynamic configuration protocol and of a point-to-point protocol, corresponding equipment and computer program
US20100157839A1 (en) * 2007-03-06 2010-06-24 Ford Daniel E Network service monitoring
US20080222730A1 (en) * 2007-03-06 2008-09-11 Ford Daniel E Network service monitoring
US8121030B2 (en) * 2007-03-06 2012-02-21 Hewlett-Packard Development Company, L.P. Network service monitoring
US7706267B2 (en) * 2007-03-06 2010-04-27 Hewlett-Packard Development Company, L.P. Network service monitoring
US20090210542A1 (en) * 2008-02-19 2009-08-20 Futurewei Technologies, Inc. Simplified protocol for carrying authentication for network access
US8621198B2 (en) * 2008-02-19 2013-12-31 Futurewei Technologies, Inc. Simplified protocol for carrying authentication for network access
US9282077B2 (en) 2010-04-16 2016-03-08 Cisco Technology, Inc. System and method for providing prefixes indicative of mobility properties in a network environment
WO2011130132A1 (en) * 2010-04-16 2011-10-20 Cisco Technology, Inc. System and method for providing prefixes indicative of mobility properties in a network environment
US8392698B2 (en) 2010-04-16 2013-03-05 Cisco Technology, Inc. System and method for providing prefixes indicative of mobility properties in a network environment
US9497164B2 (en) * 2010-05-27 2016-11-15 At&T Intellectual Property I, L.P. System and method of redirecting internet protocol traffic for network based parental controls
US20170033947A1 (en) * 2010-05-27 2017-02-02 At&T Intellectual Property I, L.P. System and method of redirecting internet protocol traffic for network based parental controls
US20110292938A1 (en) * 2010-05-27 2011-12-01 At&T Intellectual Property I, L.P. System and Method of Redirecting Internet Protocol Traffic for Network Based Parental Controls
CN105099941A (en) * 2015-06-19 2015-11-25 杭州华三通信技术有限公司 Message processing method and device

Also Published As

Publication number Publication date
US20020013844A1 (en) 2002-01-31
WO2001071982A1 (en) 2001-09-27
CA2403628C (en) 2007-05-01
CA2403628A1 (en) 2001-09-27
US20020019875A1 (en) 2002-02-14
CA2403736A1 (en) 2001-09-27
US20020023174A1 (en) 2002-02-21
AU5088801A (en) 2001-10-03
AU8725701A (en) 2001-10-03
US20020016855A1 (en) 2002-02-07
US7065578B2 (en) 2006-06-20
US20020023171A1 (en) 2002-02-21
US20020038419A1 (en) 2002-03-28
WO2001071983A1 (en) 2001-09-27

Similar Documents

Publication Publication Date Title
US6577628B1 (en) Providing quality of service (QoS) in a network environment in which client connections are maintained for limited periods of time
EP1878169B1 (en) Operator shop selection in broadband access related application
CN1984036B (en) Data packet transmission device
US7430614B2 (en) Use of IP address blocks with default interfaces in a router
US7522907B2 (en) Generic wlan architecture
US7073055B1 (en) System and method for providing distributed and dynamic network services for remote access server users
US7843923B2 (en) Methods and apparatus for determining the port and/or physical location of an IP device and for using that information
CA2296213C (en) Distributed subscriber management
US9294414B2 (en) Methods, systems, and computer program products for modifying bandwidth and/or quality of service for a user session in a network
US7447151B2 (en) Virtual private network (VPN)-aware customer premises equipment (CPE) edge router
US8484695B2 (en) System and method for providing access control
US6563793B1 (en) Method and apparatus for providing guaranteed quality/class of service within and across networks using existing reservation protocols and frame formats
US9225655B2 (en) Methods of implementing dynamic quality of service or bandwidth provisioning
US20040044789A1 (en) Dynamic service-aware aggregation of PPP sessions over variable network tunnels
US6611868B1 (en) Method and system for automatic link hang up
JP4541848B2 (en) User terminal connection control method and apparatus
AU742647B2 (en) Selectable packet-switched and circuit-switched services in a mobile communications network
EP1089524A2 (en) System for supporting multiple Internet service providers on a single network
US7107326B1 (en) Method and system for integrating IP address reservations with policy provisioning
US7467225B2 (en) System, method and apparatus for network service load and reliability management
US20020194369A1 (en) Policy-based synchronization of per-class resources between routers in a data network
US20070203990A1 (en) Techniques for establishing subscriber sessions on an access network using DHCP
US6049826A (en) Method and system for cable modem initialization using dynamic servers
US20020191539A1 (en) Pool-based resource management in a data network
US6952428B1 (en) System and method for a specialized dynamic host configuration protocol proxy in a data-over-cable network

Legal Events

Date Code Title Description
AS Assignment

Owner name: AT&T CORP., NEW YORK

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:GARRETT, JOHN W.;KALMANEK, JR., CHARLES ROBERT;NGUYEN, HAN Q.;AND OTHERS;REEL/FRAME:012235/0729;SIGNING DATES FROM 20010917 TO 20010924