公开(公告)号：AU3574102A

公开(公告)日：2002-06-18

申请号：AU3574102

申请日：2001-11-27

Applicant: ERICSSON TELEFON AB L M

Inventor： ZIMMERMANN GERD ,  LI HUI ,  WENGER FABIAN ,  LINDSKOG JAN ,  PAULI MATHIAS

IPC: H04L1/00 ,  H04L1/08

Abstract: In a packet transmission system, especially wireless transmission system, where data is transmitted in packets at different error protection levels and where the error protection level of one packet (= the succeeding packet) may differ from the error protection level of a preceding packet without providing code termination between the said preceding and the said succeeding packet the performance may degrade in case a different error protection level is used by the preceding packet and the succeeding packet. The invention proposes in these cases to insert a supplementary packet between the preceding and the succeeding packet whereby the error protection level of the supplementary packet is higher than the lowest error protection level that is used either by the preceding or the succeeding packet.

公开(公告)号：SE513113C2

公开(公告)日：2000-07-10

申请号：SE9803856

申请日：1998-11-11

Applicant: ERICSSON TELEFON AB L M

Inventor： WENGER FABIAN

IPC: H03M1/08 ,  H03M1/12

公开(公告)号：AU1433300A

公开(公告)日：2000-05-29

申请号：AU1433300

申请日：1999-11-03

Applicant: ERICSSON TELEFON AB L M

Inventor： WENGER FABIAN

IPC: H03M1/08 ,  H03M1/12

公开(公告)号：SE9803856D0

公开(公告)日：1998-11-11

申请号：SE9803856

申请日：1998-11-11

Applicant: ERICSSON TELEFON AB L M

Inventor： WENGER FABIAN

IPC: H03M1/08 ,  H03M1/12 ,  H03M

公开(公告)号：DE60223422D1

公开(公告)日：2007-12-20

申请号：DE60223422

申请日：2002-05-22

Applicant: ERICSSON TELEFON AB L M

Inventor： WENGER FABIAN ,  DETTMAR UWE ,  WACHSMANN UDO ,  SCHRAMM PETER

IPC: H04J11/00 ,  H04L7/04 ,  H04B7/26 ,  H04L7/00 ,  H04L12/28 ,  H04L27/26

Abstract: A method and a device for providing timing information within a wireless communication system are described. The timing information is extracted from a received transmit signal. The inventive method comprises the steps of providing a training signal on the receiver side relating to a known signal portion of the transmit signal, scaling the training signal, quantizing the scaled training signal, correlating one or more parts of the received transmit signal with the scaled training signal to obtain one or more correlation results, and determining the timing information on the basis of the correlation results. Based on a signal energy within a time window of the received transmit signal incorrect timing information is detected.

公开(公告)号：ES2246344T3

公开(公告)日：2006-02-16

申请号：ES01985826

申请日：2001-11-27

Applicant: ERICSSON TELEFON AB L M

Inventor： ZIMMERMANN GERD ,  LI HUI ,  WENGER FABIAN ,  LINDSKOG JAN ,  PAULI MATHIAS

IPC: H04L1/00 ,  H04L1/08

Abstract: Método para un sistema de transmisión por paquetes (1, 2, 3, 4, 5), tal como un sistema de transmisión inalámbrica, utilizando dicho método codificación de convolución de corrección de errores en recepción, en el cual los datos se transmiten en paquetes a diferentes niveles de protección de errores, donde el nivel de protección de errores de un paquete (PDUN+1) puede diferir del nivel de protección de errores de un paquete precedente (PDUN) y donde no se proporciona terminación de código entre dicho paquete precedente (PDUN) y dicho siguiente (PDUN+1) caracterizado porque en caso de que se use un nivel de protección de errores diferente por el paquete precedente (PDUN) y por el paquete siguiente (PDUN+1), se inserta un paquete suplementario DUMMY-PDU (PDU-FICTICIA) (55, 56) entre el paquete precedente y el siguiente con lo cual el nivel de protección de errores del paquete suplementario DUMMY-PDU (PDU-FICTICIA) es más alto que el menor nivel de protección de errores que se usa bien por el paquete precedente PDUN, o el sucesivo PDUN+1.

公开(公告)号：DE60207860D1

公开(公告)日：2006-01-12

申请号：DE60207860

申请日：2002-05-22

Applicant: ERICSSON TELEFON AB L M

Inventor： WENGER FABIAN ,  DETTMAR UWE ,  WACHSMANN UDO ,  SCHRAMM PETER

IPC: H04J11/00 ,  H04B7/26 ,  H04L7/00 ,  H04L7/04 ,  H04L12/28 ,  H04L27/26

Abstract: A method and a device for providing timing information within a wireless communication system are described. The timing information is extracted from a received transmit signal. The inventive method comprises the steps of providing a training signal on the receiver side relating to a known signal portion of the transmit signal, scaling the training signal, quantizing the scaled training signal, correlating one or more parts of the received transmit signal with the scaled training signal to obtain one or more correlation results, and determining the timing information on the basis of the correlation results. Based on a signal energy within a time window of the received transmit signal incorrect timing information is detected.

公开(公告)号：DE60113875D1

公开(公告)日：2005-11-10

申请号：DE60113875

申请日：2001-11-27

Applicant: ERICSSON TELEFON AB L M

Inventor： ZIMMERMANN GERD ,  LI HUI ,  WENGER FABIAN ,  LINDSKOG JAN ,  PAULI MATHIAS

IPC: H04L1/00 ,  H04L1/08

Abstract: In a packet transmission system, especially wireless transmission system, where data is transmitted in packets at different error protection levels and where the error protection level of one packet (= the succeeding packet) may differ from the error protection level of a preceding packet without providing code termination between the said preceding and the said succeeding packet the performance may degrade in case a different error protection level is used by the preceding packet and the succeeding packet. The invention proposes in these cases to insert a supplementary packet between the preceding and the succeeding packet whereby the error protection level of the supplementary packet is higher than the lowest error protection level that is used either by the preceding or the succeeding packet.

公开(公告)号：AU4159500A

公开(公告)日：2000-10-23

申请号：AU4159500

申请日：2000-03-28

Applicant: ERICSSON TELEFON AB L M

Inventor： LINDSKOG JAN ,  ALMEHAG LORENS ,  EBENHARD JOHAN ,  MALMGREN GORAN ,  WENGER FABIAN ,  HANSSON ULF

IPC: H04B7/26 ,  H04L12/28 ,  H04L29/06 ,  H04L29/08 ,  H04W52/02

Abstract: In a WLAN where an AP and MTs use a duplex airlink having a MAC frame structure to communicate with each other, the AP places wakeup PDUs at different locations in a MAC frame to allow the MTs to conserve energy by maximizing sleep time. In other embodiments, the wakeup PDUs are sequenced by MAC-ID so that a MT can conclusively determine whether remaining wakeup PDUs in a sequence can contain its MAC-ID, and go to sleep early if they cannot. In another embodiment, a wakeup PDU type can indicate to a corresponding MT whether the MT can expect downlink data later in the same MAC frame. In addition, the wakeup PDU type can indicate to the MT that the MAC frame that it should awaken and remain awake to receive downlink data in the future.