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公开(公告)号：DE60113875T2
公开(公告)日：2006-04-20
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
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.
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公开(公告)号：DE69921666D1
公开(公告)日：2004-12-09
申请号：DE69921666
申请日：1999-08-06
Applicant: ERICSSON TELEFON AB L M
Inventor： MALMGREN GOERAN , LARSSON MIKAEL , LARSSON PETER , LI HUI
IPC: H04M1/725 , H04B7/06 , H04L12/28 , H04W16/24 , H04W24/00 , H04W48/20 , H04W74/00 , H04W84/04 , H04W84/12 , H04Q7/38
Abstract: In a cellular, broadband radio access network, such as a High Performance Local Area Network Type 2 (HIPERLAN/2), which employs multiple antennas per base station, the process of identifying and selecting the most appropriate base station antenna to support a given mobile terminal may be accomplished more effectively by allowing the mobile terminal to initiate antenna selection and, thereafter, to identify the most appropriate one of the multiple base station antennas. By utilizing the mobile terminal in this capacity, the process of antenna selection can be accomplished more effectively even if there is relatively little uplink communication between the mobile terminal and its corresponding base station.
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公开(公告)号：GB2364869A
公开(公告)日：2002-02-06
申请号：GB0126543
申请日：2000-04-07
Applicant: ERICSSON TELEFON AB L M
Inventor： LINDSKOG JAN , MALMGREN GOERAN , LI HUI , RYDNELL GUNNAR , NILSSON FREDERIK , MIKLOS GYOERGY
Abstract: In a wireline or wireless telecommunications system or data network, which employs a Selective Repeat Automatic Repeat Request (ARQ) to convey data packet reception status for a sequence of data packets grouped together into a number of blocks of data packets, partial bit mapping is employed to improve efficiency, particularly with respect to bandwidth. This may be accomplished, more specifically, by including in the ARQ message that is sent from the receiver to the sender, a number of partial bitmaps, along with a corresponding number of bitmap block numbers, where a first bitmap block number identifies a particular one of the blocks of data packets and the corresponding bitmap defines the reception status of the data packets in that block. Each of the remaining bitmap block numbers identify an additional block of data packets relative to the first block of data packets. Accordingly, the remaining bitmap block numbers require fewer bits to identify their corresponding data packet blocks.
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公开(公告)号：CA2367948A1
公开(公告)日：2000-10-12
申请号：CA2367948
申请日：2000-04-07
Applicant: ERICSSON TELEFON AB L M
Inventor： MALMGREN GORAN , LI HUI , LINDSKOG JAN , RYDNELL GUNNAR , NILSSON FREDRIK , MIKLOS GYORGY
Abstract: In a wireline or wireless telecommunications system or data network, which employs a Selective Repeat Automatic Repeat Request (ARQ) to convey data packet reception status for a sequence of data packets grouped together into a number of blocks of data packets, partial bit mapping is employed to improve efficiency, particularly with respect to bandwidth. This may be accomplished , more specifically, by including in the ARQ message that is sent from the receiver to the sender, a number of partial bitmaps, along with a corresponding number of bitmap block numbers, where a first bitmap block number identifies a particular one of the blocks of data packets and the corresponding bitmap defines the reception status of the data packets in tha t block. Each of the remaining bitmap block numbers identify an additional blo ck of data packets relative to the first block of data packets. Accordingly, th e remaining bitmap block numbers require fewer bits to identify their corresponding data packet blocks.
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公开(公告)号：CA2339636C
公开(公告)日：2009-10-20
申请号：CA2339636
申请日：1999-08-06
Applicant: ERICSSON TELEFON AB L M
Inventor： MALMGREN GORAN , LARSSON MIKAEL , LARSSON PETER , LI HUI
IPC: H04M1/725 , H04W40/06 , H04B7/06 , H04L12/28 , H04W16/24 , H04W24/00 , H04W48/20 , H04W74/00 , H04W84/04 , H04W84/12
Abstract: In a cellular, broadband radio access network, such as a High Performance Local Area Network Type 2 (HIPERLAN/2), which employs multiple antennas per base station, the process of identifying and selecting the most appropriate base station antenna to support a given mobile terminal may be accomplished more effectively by allowing the mobile terminal to initiate antenna selection and, thereafter, to identify t he most appropriate one of the multiple base station antennas. By utilizing the mobi le terminal in this capacity, the process of antenna selection can be accomplished more effectively even if there is relatively little uplink communication between the mobile termin al and its corresponding base station.
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Patent Agency Ranking
公开(公告)号：ES2233535T3
公开(公告)日：2005-06-16
申请号：ES01119816
申请日：2001-08-16
Applicant: ERICSSON TELEFON AB L M
Inventor： LI HUI
IPC: H04L1/00
Abstract: Un método para seleccionar un modo de transmisión actual en un sistema de comunicación orientado a paquetes de datos, en el cual: - el modo de transmisión actual pertenece a un conjunto de modos de transmisión disponibles, - cada modo de transmisión aporta una tasa de transmisión específica para transmitir paquetes de datos, - los paquetes de datos son transferidos dentro de un transceptor entre un búfer de petición automática en una capa más alta y un búfer de petición automática en una capa inferior, - y los paquetes de datos son transmitidos por un radioenlace entre los transceptores, y en el cual el método para seleccionar el modo de transmisión actual consta de los pasos de: - medir una calidad actual de radioenlace para el radioenlace, - estimar en la capa inferior un primer valor de estado que corresponde a un estado del búfer de petición automática de la capa más alta, - determinar en dicha capa inferior un segundo valor de estado, que corresponde a un estado del búfer de petición automática de dicha capa inferior, - calcular para dicha capa inferior una tasa de transmisión deseada como el valor mínimo del primer y el segundo valor de estado, - identificar entre el conjunto de modos de transmisión disponibles un subconjunto de modos de transmisión, en el que cada uno de dichos modos de transmisión del subconjunto aporta una máxima tasa de transmisión de paquetes de datos para valores de calidad del radioenlace menores que la calidad actual del radioenlace, y - seleccionar de entre dicho subconjunto un modo de transmisión como modo de transmisión actual, que aporta la tasa específica de transmisión que más se aproxima a la tasa de transmisión deseada previamente calculada.
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公开(公告)号：AT285146T
公开(公告)日：2005-01-15
申请号：AT01119816
申请日：2001-08-16
Applicant: ERICSSON TELEFON AB L M
Inventor： LI HUI
IPC: H04L1/00
Abstract: A method and a transceiver for selecting a current transmission mode (Modec) in a data packet oriented communication system. The method comprises the steps of: measuring a current radio link quality ((RLQ)C) for the radio link, estimating on the lower layer a first status value (S1), which corresponds to a state of the automatic request buffer on the higher layer, determining on said lower layer a second status value (S2), which corresponds to a state of the automatic request buffer on said lower layer, calculating for said lower layer a target transmission rate ((N/T)target), wherein said target transmission rate is based on the first (S1) and the second (S2) status value, identifying from the set (Nset) of the available transmission modes (Modei) a subset (NSubset) of transmission modes, each of said transmission modes in the subset (NSubset) provides a maximum transmission of data packets for radio link quality values (RLQ) lower than the current radio link quality ((RLQ)C), and selecting from said subset (NSubset) a transmission mode as the current transmission mode (Modec), which provides the specific transmission rate ((N/T)i) closest to the calculated target transmission rate ((N/T)target)
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公开(公告)号：AU747109B2
公开(公告)日：2002-05-09
申请号：AU1336199
申请日：1998-10-23
Applicant: ERICSSON TELEFON AB L M
Inventor： LI HUI , BAUTZ GREGOR , JUSH JAMSHID KHUN , THIELECKE JORN
Abstract: Communication system for transmitting data packets via a plurality of virtual wireless communication links established between a base station and a plurality of operable mobile stations, the communication links having a variable transmission capacity and wherein messages for a requirement-oriented data transmission are transmitted on a plurality of communication links or channels within three types of control data packets. Said control data packets contain messages grouped according to their importance, allowing an efficient error treatment. The partitioning of messages into groups further allows an increase of the flexibility and efficiency of a data transmission, since only necessary control information is transmitted a direct decoding of received control data packets becomes possible without a detour via a higher level of a used communication model.
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公开(公告)号：AU6800301A
公开(公告)日：2002-01-21
申请号：AU6800301
申请日：2001-07-05
Applicant: ERICSSON TELEFON AB L M
Inventor： LINDSKOG JAN , LARSSON PETER , LI HUI , MALMGREN GORAN , JUSH JAMSHID KHUN , HANSSON ULF , RYDNELL GUNNAR
IPC: H04L12/28
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公开(公告)号：AU1422100A
公开(公告)日：2000-05-01
申请号：AU1422100
申请日：1999-10-06
Applicant: ERICSSON TELEFON AB L M
Inventor： MALMGREN GORAN , JUSH JAMSHID KHUN , LI HUI , DETTMAR UWE
Abstract: A TDMA/TDD link adaptation method determines radio link quality at a base station. The radio link quality is used to update and broadcast a physical layer parameter indicator (10-16) from the base station on a broadcast control channel having a common physical layer parameter indicator for all uplink and downlink channels.
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