Nokia Corporation

Nokia Networks Oy

Nokia Technologies Oy

Nokia Ip, Inc.

Martin Bergenwall

Henry Haverinen

Juha Antero Räsänen

Sami Uskela

Jukka Immonen

Patrik Flykt

Mikko Ohvo

Jan-Erik Gustav Ekberg

Ahti Muhonen

Mikko J Rinne

Petteri Pöyhönen

Eva-Maria Leppänen

Jens Staack

Topi Kaaresoja

Kengatharan Sivalingam

Lucia Elena Tudose

Mari K Nieminen

Juha Matti Pirkola

Jukka Sepp&auml;l&auml;

Tom Söderlund

Hakan Mitts

Andrei Krüger

Aapo Rautiainen

Jukka Seppälä

Jan Zenner

Jani M&aring;nsson

Yrjo Raivio

Janne Suuronen

Andrei Kruger

A system, a method for providing virus protection, and a computer program stored on a storage medium in a communication system including at least a first network coupled to a destination to which transmissions of data packets are made from the first network to the destination is described. A virus protection system includes a gateway, coupled between the first network and the destination, which includes a firewall which receives data packets and a virus scanning engine, coupled to the firewall, which receives the data packets after reception by the firewall, tests the data packets, passes any data packets, which are tested by the virus scanning engine to not contain a virus to the destination and discards any data packets which are tested by the virus scanning engine to contain a virus.

System and method of providing virus protection at a gateway

According to the present invention, a plurality of data packets are received and routed by a router () in a data network. The router () comprises storing means () for storing a pre-defined list of rules for detecting special data packets, detecting means () for detecting special data packets in the received plurality of data packets on the basis of the pre-defined list of rules stored in said storing means (), and routing means () for requesting instructions for the special data packets detected by said detecting means () and for routing the special data packets in accordance with instructions received on request. According to the present invention, an advanced service architecture for next generation network services is provided. In this service architecture, the functions of the detecting means () and the routing means () can be achieved by a service trigger and a service logic, respectively.

Advanced service architecture for next generation network services and intelligent data network router

A method and a device for optimizing the routing of data packets, in which method data packets are received, data flow is detected on the received data packets, a feedback request is transmitted in response to the detected data flow, feedback information is received, feedback information is generated and added to the received feedback information, feedback information is transmitted and the data packets belonging to the data flow are directed on the basis of said feedback information.

Method and device for routing data packets in a communication networks

The invention relates to a method for providing a DNS server address list from a serverto a clientcomprising the steps of: the clientrequests an IP address from the server; and the serverresponds by assigning the IP address together with said DNS address list to the client. In the prior art the order of the DNS server addresses in the list is static, that means that upon any IP request the same list, having the same order of addresses is provided to the client. When the client wants to output a DNS request he starts by asking the first server in the list irrespective as to whether said server may currently be overloaded or has gone down. In these situations time is lost since no response is provided by such a disturbed DNS server to a DNS request and the client has to ask another server in the list. In order to overcome these disadvantages the order of the DNS server addresses in the list is dynamically updated in that the client always knows which of the available DNS servers is currently best appropriated.

Method for providing a DNS server address list from a server to a client

A method for communicating a message over a data path by means of data transfer apparatus capable of transmitting the data over the data path, generating a representation of the data as received from the data path and generating an indication of the communication quality of the data path; the method comprising: forming a plurality of individual data segments together representing the message, the format of each data segment being selected from one of a plurality of available segment formats in dependence on the quality of the data path; transferring the segments over the data path by means of the data transfer apparatus; and combining the segments as received from the data transfer apparatus to form a representation of the message.

Header compression

A packet data transmission network system is disclosed which comprises a receiver (), a sender () for transmitting data packets to the receiver () through a packet data connection via a network element (). The receiver () acknowledges each received data packet by an acknowledgment message which contains header data comprising a window size, the number of transmitted bytes for which the sender () has not received an acknowledgment from the receiver () being not allowed to exceed the window size. The network element () buffers data packets transmitted by the sender () and examines and modifies the header data. According to the invention, the network element () detects transmission conditions and modifies the window size accordingly.

Packet data transmission control

A method of selecting the serving network element in a telecommunications network. Mobility agents or routers transmit attribute information on one or more network elements in advertising messages to at least one mobile node. This information is used in the mobile node for selecting the serving network element.

Selection of serving network element in telecommunications network

The invention relates to radio systems and particularly to a handover and interworking between two radio systems utilizing different link protocols. According to the invention, in a handover the radio link protocol of the old (handover source) radio system is also retained after the handover in the new (target) radio system. The 'old' radio link protocol is merely adapted to a physical traffic channel of the new radio system. One manner of implementing the adaptation to the traffic channel is to set up the radio link protocol of the 'new' radio system between the mobile station and the interworking function and to transmit the radio link protocol frames of the &#x201c;old&#x201d; radio system within the radio link protocol of the new radio system. Due to this simple but effective arrangement, possibly ongoing sequences of selective retransmissions and retransmission requests of the old radio link protocol are not interrupted or disturbed, wherefore it is also possible to avoid the manipulation of buffer synchronization which might possibly lead to retransmission complications and loss or doubling of data as a result of the handover.

Handover and interworking in radio system

The invention relates to data transmission in telecommunication systems and particularly in radio systems. The invention employs 'payload numbering' instead of or in addition to conventional frame numbering. Data () is split into fixed-length data blocks or payload units (). The size of a block is preferably equal to or smaller than the shortest information field in frames () of the protocol(s) used. Each protocol frame carries one or more payload units. In an optimum situation the length of the information field in a protocol frame equals n * the length of the payload unit, where n is an integer. Instead of frame numbering (in some special cases possibly in addition to it) the protocol frame carries payload numbers both for indicating the payload units (data blocks) conveyed in the protocol frame and for acknowledging the received blocks.

Data transmission methods with payload unit numbering in a telecommunication system

This is a method and system to efficiently do handovers for mobile IP. The mobile node registers itself with several foreign agents using a new registration type. Only one of the foreign agents is selected to forward the data packets of a data message to the mobile node. The selection algorithm may be one based on randomness, dynamic learning, message traffic congestion, or statistical information collected at the mobile node.

Anycast binding mobile communication method and system

Sample packets (S -Sn) are formed from an input signal ( ), there being a sample period (P -Pn) related to each sample packet. The sample packets are inserted into a packet network ( ) and transmitted to a recipient. The information content of the input signal per time unit (BR) is monitored and the information content of each sample packet (S -Sn) is kept substantially constant on the basis of this information by controlling the duration of the sample period (P -Pn) of the sample packets. Information on the duration of the sample period (P -Pn) is transmitted to the recipient in the packet network packet. The packets ( ) are received in the receiver and sample packets (S -Sn) are separated from them and supplied to a decoder ( ). Information on the duration of the sample period (P -Pn) is also separated and supplied to the decoder ( ), which uses it as the playing time of the restored output signal ( ).

Variable bit rate transmission of AV signal in packet network

A re-registration authorization is attached to a registration request or data packet sent from a mobile node roaming on a foreign network. The mobile node requests registration with its home network in order to maintain communication with the Internet and maintain identification of the mobile node by its individual home address. Such registration has a limited lifetime, and the re-registration authorization attached to the registration request or other data packet authorizes an intermediate communication entity in the foreign network to re-register the mobile node, on behalf of the mobile node, with the mobile node's home network, if the communication traffic of the mobile node indicates that the mobile node is still roaming on the foreign network. The rate of error is reduced by significantly reducing the amount of transmissions sent from the mobile node, and power consumption of the typically battery-powered mobile unit is reduced, as well.

Registration for mobile nodes in wireless internet protocols

A packet transmission method and apparatus, according to which short data samples or mini packets from several simultaneous connections are multiplexed to a variable length packet. The length of the mini packets is defined in a common length field for mini packets of the same length, which saves bandwidth. Each mini packet has its own header, which defines at least an identification information of the mini packet. Thus, the variable length packet, e.g. an IP packet, includes a plurality of mini packets with a minimum header portion, such that transmission overhead is reduced due to the fact that most mini packets tend to be of the same length. Moreover, different queues for mini packets of one respective length may be provided, from which mini packets of one length are multiplexed to the variable length data packet. Thereby, the ratio of variable length data packets including mini packets of one length is further increased so as to further decrease the transmission overhead.

Packet transmission method and apparatus

The invention relates to a cellular radio network and a method of connecting a base station (,) to a cellular radio system, which enable a fast and automatized installation of base stations wherever an IP information network is available, the cellular radio system comprising a base station system which comprises as network elements a base station controller (,) and at least one base station, and in which method the base station controller controls at least one base station. The invention is characterized in that the network elements (,) are interconnected by an information network using a packet protocol, and that each network element is provided with a unique network element address, and that the network configuration information of said information network using the packet protocol is maintained at a configuration server (,) connected to the information network, and that a new base station connected to the network first contacts the configuration server, and that the configuration server transmits the network configuration information to the base station.

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Espoo, Finland

Martin Bergenwall