Nokia Corporation

Nokia Siemens Networks Oy

Nokia Networks Oy

Wi-lan Inc.

Tommi Koistinen

Olli Sakari Kirla

Johan Haeggström

Jyri Suvanen

A method for transmitting information related to tandem free operation, where a cellular network comprising a tandem free operation capable coding-decoding unit is connected to a packet network, an entity, which can be a second network or a terminal, is connected to the packet network and data is transmitted over the packet network between the coding-decoding unit on a first side of the packet network and the entity on a second side of the packet network. Here, information about the decoding capabilities and tandem free operation capabilities on the first side of the packet network is transmitted over the packet network to the second side of the packet network. The invention relates also to a decoding information exchange arrangement a decoding information transmission arrangement and to a cellular network element.

Method for transmitting coding information over packet data network

An arrangement of a network element, which routes communication traffic among different types of communication networks, includes a central processing unit configured to perform routing operations on the basis of a communication protocol, which forms a stack. Also, the arrangement of the network element includes devices configured to handle signal processing related issues and communicating with the central processing unit. The communication protocol stack is divided into a first stack situated in the central processing unit, which performs the routing operations of protocols in the first stack, and into a second stack, each device that handles signal processing related issues performing the operations of protocols in the second stack.

Sharing of protocol processing

An access system, such as a DSL (Digital Subscriber Line), includes a multiplexer for connecting subscriber devices, such as telephones and/or IP terminals, to a subscriber line; and an access multiplexer for connecting subscriber lines to a backbone network. The access system may also include a gateway for connecting the backbone network to a first system. When the access system receives a voice call to a second system via the telephone system and the first system employs a voice coding method, the access system is arranged to negotiate with the second system a type of voice codec to be used in both the first and second system. The access systems is configured to transmit an encoded voice signal from the subscriber device or the multiplexer to the first system and to transmit an encoded voice signal from the first system to the subscriber device or the multiplexer.

DSL access system negotiating a voice codec type to be used between two systems

The invention relates to a network element () and a method for enhancing the quality of digitised analogue signals transmitted in parameterised coded form via a digital network. In order to enable an enhancement of the quality of the digitised analogue signals on network side, the network element comprises means () for extracting signals from and insert signals into the network, first processing means () for processing the extracted parameters in the parameter domain with functions suitable to enhance the quality of the digitised analogue signals and second processing means () for processing the extracted parameters in the linear domain with functions suitable to enhance the quality of the digitised analogue signals. Moreover included analysing and selecting means () determine the expected enhancement of quality in the different processing domains and cause a corresponding insertion of processed signals back into the network. The proposed method comprises corresponding steps.

Audio signal quality enhancement in a digital network

A method and an intermediate element, or a gateway, for routing an information flow in a telecommunication system including a plurality of switching centres. The switching centres are connected with an Internet Protocol (IP) based connection via the gateways, which are arranged to perform speech coding/decoding for an information flow between the switching centres. The gateways are further arranged to detect if the information flow from the switching centre is a data call and to omit the speech coding if the information flow is a data call. The data call detection is performed based on of a symbol pattern included in the frame structure of the information flow.

Data call routing on IP connections

The present invention proposes a method of providing information of the echo path of a speech connection in a Packet Data Network, said method comprising the steps of requesting delay information by means for triggering echo removal, said delay information being obtained by signaling a non-speech measurement data unit to said Packet Data Network by an echo estimation means, and measuring the delay of the echo of said measurement data unit by said echo estimation means; replying the echo delay of said measurement data unit from said echo estimation means; generating delay information including at least said echo delay of said measurement data unit; and adjusting a shift register being related to an echo removing device by the use of said delay information such that the performance of said echo removing device is optimized in view of its echo removing capability.

Delay measurement system in a packet network

A transmitting/receiving arrangement, gateway and method for transmitting data over packet network, where a cellular network is connected to a packet network and uplink data frames which carry coded data and certain signaling information related to the coding are transmitted from the cellular network towards the packet network, wherein at least all non-redundant information from the uplink data frames is extracted from the frames and transmitted over the packet network. The gateway connects a packet network to a telephony network.

Method for transmitting calls over packet network

The present invention discloses a communication system comprising a first communication device, a first network control device for controlling a first network to which the first communication device is connected, and a first interface establishing device connected between the first network control device and a transmitting network. The first communication device and the first network control device are connected such that a use signal and a control signal are sent separately to the first network control device. Furthermore, the first network control device and the first interface establishing device are connected such that the use signal and the control signal are sent separately to the first interface establishing device. In the communication system according to the invention, the need for a tone detection in the first interface establishing means, i.e. the gateway for the network, for example an IP-based network, is eliminated. Hence, a simplified hardware structure can be achieved and disturbances of the use signal by the control signal can be reduced.

Tone detection elimination

The invention relates to a method () for transmitting information related to tandem free operation, where a cellular network comprising a tandem free operation capable coding-decoding unit is connected to a packet network, an entity, which can be a second network or a terminal, is connected to the packet network and data is transmitted over the packet network between said coding-decoding unit on a first side of the packet network and said entity on a second side of the packet network. The method according to the invention is characterized in that information about the decoding capabilities and tandem free operation capabilities on the first side of the packet network is transmitted () over the packet network to the second side of the packet network. The invention relates also to a decoding information exchange arrangement (), to a gateway (), to a decoding information transmission arrangement () and to a cellular network element ().

In a mobile speech communication system including a base station having a data connection to a mobile services switching center through a transcoder unit, where the data connection includes a circuit-switched data transmission connection between the base station and transcoder unit to exchange speech parameters transmitted as TRAU frames, the data connection also being partly composed of a packet-switched data transmission connection to improve the data transmission connection, a converter is arranged on the data transmission connection between the base station and the transcoder unit for converting a TRAU frame received from the circuit-switched data transmission connection into a packet to be transmitted over the packet-switched connection, wherein the conversion includes a removal of bits included in the TRAU frame which are not needed on the packet-switched connection. The converter also for converting a packet received from the packet-switched connection into a TRAU frame to be transmitted over the circuit-switched connection, wherein the conversion includes at least the addition of synchronization bits to the TRAU frame.

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Espoo, Finland

Tommi Koistinen