公开(公告)号：DE60034493T2

公开(公告)日：2008-01-10

申请号：DE60034493

申请日：2000-02-25

Applicant: ERICSSON TELEFON AB L M

Inventor： WESTBERG LARS ,  SVANBRO KRISTER ,  SUNDQVIST JIM

IPC: H04L1/00 ,  H04L29/06 ,  H04L12/56

Abstract: The soft state of a header compression scheme in a communication system carrying packet traffic including a real time communication signal can be updated (63) during periods of communication signal inactivity (62), during which there is no need to transmit the communication signal. The header compression soft state can also be updated by stealing bits (83, 84) from the communication signal to carry the header update information (73). If the communication signal includes source encoded data, the header compression soft state can be updated selectively (126) based on the bit rate (122, 124) of a codec that produced the source encoded data.

公开(公告)号：ES2287133T3

公开(公告)日：2007-12-16

申请号：ES01937059

申请日：2001-05-22

Applicant: ERICSSON TELEFON AB L M

Inventor： SUNDQVIST JIM ,  LENNESTAL HAKAN ,  NOHLGREN ANDERS ,  LINDQVIST MORGAN ,  WANG WEI

IPC: H04L12/64

Abstract: Una unidad terminal (11, 12) en un sistema de comunicaciones que admite la comunicación basada en paquetes, que incluye medios receptores, medios (40) de descodificación del habla y una memoria intermedia (20) de fluctuaciones para manejar las variaciones de retardo en la recepción de una señal de habla consistente en paquetes que contienen tramas con habla codificada, c a r a c t e r i z a d a porque la unidad terminal comprende además medios (50) de control de la memoria intermedia de fluctuaciones, configurados para adaptar el tamaño funcional de dicha memoria intermedia (20) de fluctuaciones, guardando información sobre el tamaño funcional de la memoria intermedia de fluctuaciones y para proporcionar a dichos medios de descodificación del habla información de control, utilizando además información sobre la señal (40) de habla recibida, empaquetada, codificada/descodificada, y porque los medios (40) de descodificación del habla, basándose en dicha información, proporcionan una adaptacióndinámica del tamaño de la memoria intermedia (20) de fluctuaciones, modificando la señal de habla codificada o descodificada.

公开(公告)号：ES2281869T3

公开(公告)日：2007-10-01

申请号：ES05017668

申请日：2000-02-25

Applicant: ERICSSON TELEFON AB L M

Inventor： WESTBERG LARS ,  SVANBRO KRISTER ,  SUNDQVIST JIM

IPC: H04L1/00 ,  H04L29/06 ,  H04L12/56

Abstract: Un método para transmitir información desde una primera estación de comunicaciones a una segunda estación de comunicaciones, que comprende: el ensamblaje de paquetes en la primera estación que incluye información de cabeceras e información de carga útil, y el envío de los paquetes ensamblados desde la primera estación a la segunda estación; incluyendo dicho paso de ensamblaje el ensamblaje por la primera estación de un paquete de actualización, incluyendo la sustitución de al menos parte de la información de carga útil (111) con información de actualización de la cabecera, que ha de ser utilizada por la segunda estación para interpretar la información de cabeceras en paquetes subsiguientes enviados desde la primera estación hasta la segunda estación; y incluyendo dicho paso de envío el envío de dicho paquete de actualización desde la primera estación a la segunda estación.

公开(公告)号：DE60028380D1

公开(公告)日：2006-07-06

申请号：DE60028380

申请日：2000-06-29

Applicant: ERICSSON TELEFON AB L M

Inventor： SUNDQVIST JIM

IPC: H04L29/06 ,  H04L12/56 ,  H04L12/64 ,  H04L29/08

Abstract: A source encoder schedules its access to a network IP stack. During that scheduled period, the source encoder blocks the transport of non-real-time TCP and UDP packets. After at least one real-time packet has been transported through the stack, the source encoder allows the non-real-time packets to access the physical layer until the beginning of the next scheduled period. Consequently, the packet transport delay is reduced significantly, which results in a substantial increase in throughput.

公开(公告)号：SE521462C2

公开(公告)日：2003-11-04

申请号：SE9902630

申请日：1999-07-08

Applicant: ERICSSON TELEFON AB L M

Inventor： NOHLGREN ANDERS ,  SUNDQVIST JIM

IPC: H04L29/08 ,  H04B14/04 ,  H04J3/06 ,  H04L7/00 ,  H04L12/64 ,  H04Q11/04

Abstract: The invention is concerned with a method and an apparatus, wherein information data is sent between at least two transceivers in a telecommunication system. The information data is transmitted from the sender of a transceiver to the receiver of one or more other transceivers in form of digital signals having a given sampling frequency. The signals are played out by the receiver in a controlled way. The invention is mainly characterized by estimation of the sender's sampling rate at the sending side of a transceiver, transmitting the estimation to the receiving side of an another transceiver, and controlling the playout of the information data at the receiving side by means of the sampling rate estimated at the sending side to avoid delays and/or interrupts in the presentation. The invention is especially suitable in connection with packet based networks wherein the information data is sent between the transceivers in the telecommunication system in form of packet data frames, such as audio frames.

公开(公告)号：SE518941C2

公开(公告)日：2002-12-10

申请号：SE0002016

申请日：2000-05-31

Applicant: ERICSSON TELEFON AB L M

Inventor： SUNDQVIST JIM ,  LENNESTAAL HAAKAN ,  NOHLGREN ANDERS ,  LINDQVIST MORGAN ,  WANG WEI

IPC: H04L12/64

Abstract: The present invention relates to a receiver system in a communication system supporting packet-based communicatior (e.g., an IP-network), including a receiver, speech decoder ( 40 ) and a jitter buffer ( 20 ) for handling delay variations in the reception of a speech signal consisting of packets containing frames with encoded speech. A jitter buffer controller ( 50 ) is provided for keeping information about the functional size of the jitter buffer ( 20 ) and for providing the speech decoder ( 40 ) with control information, such that the speech decoder ( 40 ), based on that information. provides a dynamic adaptation of the size of the jitter buffer ( 20 ) using the received encoded, packetized speech signal. The invention also relates to a method of adapting the functional size of the jitter buffer of a receiver system.

公开(公告)号：SE0100633L

公开(公告)日：2002-10-23

申请号：SE0100633

申请日：2001-02-23

Applicant: ERICSSON TELEFON AB L M

Inventor： LENNESTAAL HAAKAN ,  SUNDQVIST JIM ,  ARNGREN TOMMY

IPC: H04L12/18 ,  H04L29/06 ,  H04L29/08 ,  H04L12/16 ,  H04Q11/04

公开(公告)号：AU3427601A

公开(公告)日：2001-08-20

申请号：AU3427601

申请日：2001-02-09

Applicant: ERICSSON TELEFON AB L M

Inventor： SUNDQVIST JIM ,  HANNU HANS ,  TIMUS BOGDAN ,  NORRGARD JOAKIM ,  SCHELEN OLOV

IPC: H04L12/56 ,  H04L29/06 ,  H04W28/26 ,  H04L12/00

Abstract: Methods and apparatus are provided for reserving resources in a wireline network from a wireless network. A resource reservation request is made by a service client to a service broker. The service broker contacts a bandwidth broker to determine the available resources in the wireline network. The service broker also contacts a geographical domain server for information related to wireless access for the requested reservation. Using information provided by the geographical domain server, the service broker contacts a radio bearer broker to determine the resources available in a particular wireless network. Based upon the information provided by bandwidth brokers and radio bearer brokers, the service client can reserve the requested resources.

公开(公告)号：SE0004839D0

公开(公告)日：2000-12-22

申请号：SE0004839

申请日：2000-12-22

Applicant: ERICSSON TELEFON AB L M

Inventor： SUNDQVIST JIM ,  JANSSON FREDRIK

IPC: G06F5/00 ,  H04J3/06 ,  H04L20060101 ,  H04L47/2416 ,  H04L47/32 ,  H04L

Abstract: A method for controlling a jitter buffer and a communication apparatus implementing the method and functioning as a first node of a communication system, wherein the jitter buffer is adapted to buffer a stream of blocks of compressed speech information generated in a second node in the communication system, transmitted to and received in the first node. Blocks of compressed speech information in said stream of blocks are selected ( 201 ) according to a predetermined rule based on the current buffering delay of the jitter buffer and at least one characteristic of said blocks of compressed speech information. Predetermined actions aiming at reducing buffering delay in the jitter butter are applied ( 202 ) to the selected blocks.

公开(公告)号：SE513520C2

公开(公告)日：2000-09-25

申请号：SE9801725

申请日：1998-05-14

Applicant: ERICSSON TELEFON AB L M

Inventor： EKUDDEN ERIK ,  SVENSSON TOMAS ,  SUNDQVIST JIM

IPC: G10L19/12 ,  G10L19/00 ,  H04L1/00 ,  H04L12/56 ,  H04L12/64 ,  H04L1/22

Abstract: A decoder improves delayed packet concealment in a packet network by using two decoder sections. A first decoder section bases its decoding during the concealment phase on erroneous filter states and a set of speech parameters, whereas a second decoder section bases its decoding on saved and updated filter states and the same speech parameters. The outputs of the two decoder sections are thereafter combined to form the final speech signal. This decoding strategy produces a speech signal with smooth transitions from delayed to non-delayed packets and uses information from the most recent packets for speech generation.