Telefonaktiebolaget Lm Ericsson (publ)

Daniel Enström

Tomas Frankkila

Ingemar Johansson

Stefan Bruhn

Ghyslain Pelletier

Stefan Wänstedt

Tomas Hedberg

Janne Peisa

Reiner Ludwig

Mats Fredrik Sagfors

Johan Kristiansson

Anisse Taleb

Fredrik Klas Jansson

Adam Bergkvist

Renier Ludwig

Mats SÅGFORS

Mats Sågfors

In a method of providing a backward and forward compatible speech codec payload format, performing the steps of providing a RTP package. Subsequently, including payload according to a first codec into the provided RTP package, and appending payload according to a second codec into the provided RTP package. In addition, locating at least one unused bit in the included first codec payload, and designating the located at least one unused bit as a codec compatibility bit. Finally, utilizing the designated at least one codec compatibility bit to provide an indication of the presence of the appended second codec payload.

Method and arrangement for providing a backwards compatible payload format

A method of controlling a receiver of a data unit communication from a data source is described, said receiver being associated with a first terminal of a data unit communication network providing said first terminal with a transport service characterized by a set of values associated with respective service quality parameters, said service quality parameters comprising a Guaranteed Bit Rate (GBR), said data source being associated with a second terminal. The method comprises determining, by the receiver, whether a received data unit contains an Explicit Congestion Notification (ECN). If said ECN is detected, the method further comprises sending, from the receiver, to said data source a message for adjusting a data transmission rate of said data source, said message indicating as an upper bound for said data transmission rate a value corresponding to a value associated with the GBR for said first transport service.

Data transmission control methods and devices

In a method of providing a backward and forward compatible speech codec payload format, the following steps are included: providing San RTP package; including Spayload according to a first codec into the provided RTP package, and appending Spayload according to a second codec into the provided RTP package. In addition, at least one unused bit is located Sin the included first codec payload, and the located at least one unused bit is designated Sas a codec compatibility bit. Finally, the designated at least one codec compatibility bit is utilized Sto provide an indication of the presence of the appended second codec payload.

A signalling gateway is arranged to allow a first client using hypertext transfer protocol, HTTP, to initiate a real-time connection to a SIP, session initiation protocol, client using SIP. The signalling gateway is arranged to use a distributed shared memory to support communication between the first client and the signalling gateway regarding session information of the real-time connection. Corresponding methods, computer programs, and computer program products are also presented.

Signalling gateway, method, computer program and computer program product for communication between HTTP and SIP

A method and arrangement for controlling a balance between Packet Switched (PS) data, and Circuit Switched (CS) data in a cellular communication network. A network node is arranged in a cellular communication network to control communication of PS data between a first UE and a base station, and to control communication of CS data between a second UE and the base station. Both the first UE, the second UE and the base station are associated to the cellular communication network and are located in the cell. The network node comprises a controllerwhich is adapted to identify a risk of congested communication of data, and a transceiverwhich is adapted to communicate PS data with the first base station, and to communicate CS data with the second base station. The controller is further adapted to request the second UE to change communication settings, and the controller is further adapted to reallocate transmission resources from the second UE, to the first UE.

Load balancing of data

In order to efficiently handle the switch between user media and announcement media, a basic step is to first determine a configuration of the user media. Next, a configuration of the announcement media to be presented is determined based on the determined user media configuration. Subsequently, the announcement media is configured according to the announcement media configuration, and the configured announcement media is finally sent to the intended user. In this way, the overall appearance or sound of the announcement will be virtually the same as or at least similar to the overall appearance or sound of the user media, preferably without distortions. This allows the user to perceive the announcement as clearly as possible.

Handling announcement media in a communication network environment

In a method of improved session negotiation between first and second clients in a cellular telecommunication system, the two clients negotiating Sand agreeing upon a first codec type for a session. The first and second clients then initiating the session and exchanging Smedia data frames according to the first codec type. Subsequently, during the initiated session, at least one of the first and second clients providing San indication for a second codec type in at least one subsequent media data frame. Finally, upon receiving and recognizing said indication, the other of said first and second clients switching Sto the indicated second codec type in a next media data frame, thereby enabling the first and second clients to exchange subsequent media frames utilizing the second codec type.

Method and arrangement for session negotiation

A method and apparatus for determining a location address for shared packet switched data. The data is to be accessible by a user of a first device and a user of a second device. A symmetric function is applied to a known identifier associated with the first device and a known identifier associated with the second device. The result of the function can then be used as an address for data to be accessible by users of both the first device and the second device, the data being stored on a remote server at a location defined by the address. The method ensures that the same address is calculated regardless of which identifier is used first, and that both devices can calculate the address without requiring any further signalling or capability/discovery mechanism.

Determining a location address for shared data

A method of controlling a radio access network entity of a data unit communication network is described, said radio access network entity being involved in providing a transport service to a radio terminal of said data unit communication network, said transport service being characterized by a set of values associated with respective service quality parameters, said method comprising: monitoring (S) a communication quality at the radio access level of a communication between said terminal and an access point of said radio access network, and setting (S) a congestion indication marking in data units of said transport service if said communication quality fulfils a radio communication degradation condition.

The invention relates to a method for controlling a bit-rate of a session in a packet-switched communications system where multiple sessions are set-up via a shared resource. A current bit-rate of the session is compared to a bit-rate range valid for the session to determine a distance from the position of the current bit-rate to one of the end-points of the bit-rate range. The current bit-rate is then adapted differently depending on the distance to the selected end-point. By controlling the bit-rate of each session that is set-up via the shared resource for applications that provide delay-sensitive services to users in this way the method and corresponding system and sender-receiver arrangements have the effect that rate adaptations can be distributed among the applications so that users share responsibility for rate adaptations.

Adaptive rate control in a communications system

A method of controlling a radio access network entity of a data unit communication network is described, said radio access network entity being involved in providing a transport service to a radio terminal of said data unit communication network, said transport service being characterized by a set of values associated with respective service quality parameters, said method comprising: monitoring (S) a communication quality at the radio access level of a communication between said terminal and an access point of said radio access network, and setting (S) a congestion indication marking in data units of said transport service if said communication quality fulfills a radio communication degradation condition.

A method of controlling an adaptable jitter buffer in accordance with the present invention detects a context description of data handled by the adaptable jitter buffer. Thereafter it is determined whether the detected context description is equal to a predetermined context description. If not, jitter buffer adaptation proceeds as normal. Otherwise it is determined whether the current target buffer depth is too low for the detected context description. If not, the target buffer depth is frozen to the current value. Otherwise it is increased and frozen at a higher value that is compatible with the detected context description.

Jitter buffer control

It is a basic idea to determine the characteristics of a jitter profile measured over a plurality of packets, and classify the jitter profile based on the determined characteristics as well as information representative of the particular access used for communication between the sender and the receiver. The classified jitter profile is then matched to an appropriate action for media layer adaptation so that a proper action for media layer adaptation can be initiated.

Jitter-based media layer adaptation in real-time communication systems

In a method of improved media frame transmission in a communication network. Initially a plurality of 'original' or regular media frames are provided for transmission. According to the invention, robust representations of the provided regular media frames are generated and stored locally. Subsequently, one or more of the regular media frames is/are transmitted. The invention detects an indication of a loss of a transmitted media frame, and the idea is to transmit, in response to a detected frame loss, a stored robust representation of the lost media frame and/or a stored robust representation of a subsequent, not yet transmitted, media frame to increase the media quality.

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Gammelstad, Sweden

Daniel Enström