Abstract: Embodiments of the present invention relate to an apparatus and method for providing an end user of a network terminal in a local network with an access link to an external network. According to an embodiment of the present invention, a network node further includes a control unit arranged to transmit a local hypertext transfer protocol (HTTP) response including detailed information to at least one network terminal in said local network using an earlier original HTTP request towards said external network made by said at least one network terminal in the local network.

Abstract: A probing method, arrangement, and system for estimating a condition, such as available bandwidth, of a data path in a communication network including multiple nodes are described. A probe-packet sender node transmits probe packets with a sent inter-packet separation and a time-to-live towards an intermediate node. Control message packets are generated by the intermediate node when the time-to-live expires. The probe-packet sender node receives the control message packets and calculates a received inter-packet separation. An estimate of the data path condition can be generated based on the sent inter-packet separation and the received inter-packet separation.

Abstract: A system and method for determining end-to-end available bandwidth of a path in a packet-switched communication network. A multi-rate packet chirp injector injects probe traffic packets at different probing rates, u, into the network utilizing a probe chirp. A receiver samples time separation of the probe traffic packets to generate time-separation samples, which are used to calculate relative inter-packet separation strain, ?, samples at different probing rates. An Expectation-Maximization, EM, analyzer utilizes an EM algorithm to identify useful strain ? samples and to estimate parameters of a line l2 representing a direct linear relationship between the probing rate and the inter-packet separation strain ? at probing rates greater than a break point. A filter such as, for example, a Kalman filter then determines the available bandwidth of the network path based on the estimated parameters of the line l2.

Abstract: Information about virtual private networks—VPNs—in each domain of a multi-domain communications system is provided. By comparing a request for a configuration of a VPN with the provided information of other connected domains, a match can be found. VPN configuration can then be performed based on the outcome of the match. The provided domain VPN information is in one embodiment spread to other domains under constrictions put by SLAs between domain operators. The spreading of VPN information can be performed regularly or triggered by an external event. In another embodiment, the VPN configuration request is instead spread to different domains.

Abstract: The present invention relates to methods and arrangements to optimize bandwidth usage in a Multicast Services Control System (MSCS) for digital information transport. The system comprises a service provider (Server) and service receivers (STB1-STB5) able to receive multicast streams from the service provider along multicast trees in an IP network (A/MNW). The method comprises the following steps: —A multicast join is performed by the service receivers to a multicast group associated with the service of interest provided by the service provider. —Bandwidth is measured on paths in a joined multicast tree. —Each of the service receivers (STB1-STB5) join an optimal multicast group (D1, D2, D3), which joining is based on the measurements.

Abstract: The present invention relates to methods and arrangements to measure network performance. The method comprises the following steps:—Transmitting via a communication network (IP) payload packets (21-24) from a sending node (GGSN/A) to a receiving node (GGSN/B).—Generating at the sending node (GGSN/A) a send specification (s21-s24, sid21-sid24) for each of at least one selected packet (21-24) of the transmitted payload packets (21-24).—Generating at the receiving node (GGSN/B), a receive specification (r21-r22, rid21-rid22, siz21-siz22) for each of at least one selected packet (21-22) of the transmitted payload packets (21-24).—Bringing together generated send specifications (s21-s24, sid21-sid24) and generated receive specifications (r21-r22, rid21-rid22, siz21-siz22).—Estimating network performance by utilizing corresponding specifications (s11-s12, r11-r12, siz21-siz22) of the brought together specifications.

Abstract: A method and arrangement for enabling communication with a client device by making a currently valid communication address of the device publicly available. The client device sends a freely composed connectivity key to a publicly available connectivity server, the connectivity key being searchable by means of web searching using a search engine. The client device also sends connectivity parameters to the connectivity server including at least the communication address, which then becomes publicly available in the connectivity server by web searching of the associated connectivity key. If a new currently valid communication address is obtained for the client device, the connectivity parameters can be updated by sending the new communication address to the connectivity server.

Abstract: Link information is obtained about new or changes links in a communications system having a plurality of domains. The link information concerning a link between a first and a second domain comprises at least four pieces of information, domain identity of the first domain, domain identity of the second domain, link end identifier for a first end of the link, and link end identifier for a second end of the link. The link information is cascaded through the communications system by providing the link information stepwise from one domain to an adjacent domain. This is achieved by spreading the obtained link information to adjacent domains and by distributing link information received from adjacent domains to further adjacent domains. Preferably, the link information is compiled and access to the compiled link information is provided for creation of a system link map.

Abstract: Information about virtual private networks—VPNs—in each domain of a multi-domain communications system is provided. By comparing a request for a configuration of a VPN with the provided information of other connected domains, a match can be found. VPN configuration can then be performed based on the outcome of the match. The provided domain VPN information is in one embodiment spread to other domains under constrictions put by SLAs between domain operators. The spreading of VPN information can be performed regularly or triggered by an external event. In another embodiment, the VPN configuration request is instead spread to different domains.

Abstract: A multicontent e-mail has a body part comprising separately encrypted content parts and a header part comprising a clear text part and an encrypted part. The encrypted header part includes a descriptor section and a link section. The link section specifics relationships between content parts. The descriptor section provides information related to each body content part such as information format. The descriptor section, further, provides information for access to any content part such as requirement for authorization. The access information can include executable code exemplary for establishing a negotiation process for access to linked information at a remote information server. Further disclosed is an arrangement for download and decryption of the e-mail header part and analysis of the descriptor section. A user can select any body content part for downloading according to requirements determined from the descriptor section.