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42 条记录 (耗时 0.023 秒)

    METHOD AND ARRANGEMENT FOR ADVANCED ROUTING METRICS IN MULTIHOP NETWORKS
    2.
    发明授权
    METHOD AND ARRANGEMENT FOR ADVANCED ROUTING METRICS IN MULTIHOP NETWORKS 有权
    方法和系统高级路由度量在多跳网络

    公开(公告)号：EP1859580B1

    公开(公告)日：2012-03-07

    申请号：EP05722190.5

    申请日：2005-03-08

    申请人： Telefonaktiebolaget L- M Ericsson (publ)

    发明人： LARSSON, Peter ,  JOHANSSON, Niklas ,  HU, Rong ,  ZHANG, Zhang

    IPC分类号： H04L12/56 ,  H04L12/28

    CPC分类号： H04W40/06 ,  H04L45/00 ,  H04L45/123 ,  H04W84/18 ,  Y02D70/22 ,  Y02D70/322

    摘要： The inventors have envisioned a multihop network scenario in which nodes are equipped with advanced multi-antenna arrangements, and recognized the advantage of exploring the presence of such advanced antenna arrangements in multihop network nodes for the specific purpose of determining link cost for routing in the network. Link cost is determined for a wireless link between a pair of nodes in the network based on multi-channel characteristics between the nodes, where at least one of the nodes is configured for operation with multiple antennas to provide for multiple channels. These multi-channel characteristics may for example be determined based on explicit channel matrix estimation and/or the number of transmit and receive antennas or other information on the antenna capabilities of the involved nodes. The determined link cost information may subsequently be used together with additional routing cost information for route determination, and packet forwarding.

    METHODS AND ARRANGEMENTS FOR DETERMINING RADIO CHARACTERISTICS OF A RADIO LINK
    3.
    发明公开
    METHODS AND ARRANGEMENTS FOR DETERMINING RADIO CHARACTERISTICS OF A RADIO LINK 有权
    法和安排确定无线链路的无线特性

    公开(公告)号：EP2374225A1

    公开(公告)日：2011-10-12

    申请号：EP08876295.0

    申请日：2008-11-18

    申请人： Telefonaktiebolaget L M Ericsson (PUBL)

    发明人： FRENGER, Pål ,  JOHANSSON, Niklas ,  LARSSON, Peter

    IPC分类号： H04B7/15 ,  H04B7/26 ,  H04W52/46

    CPC分类号： H04B7/155 ,  H04W52/46

    摘要： A method and arrangement in a first node (101) for determining radio characteristics of a radio link between a first repeater (103, 203) and at least one second repeater (104, 204) are provided. The first node sends a first message, to the first repeater (103, 203), instructing the first repeater (103, 203) to send a radio signal being measureable by the second repeater (104, 204). Furthermore, the first node sends a second message, to said at least one second repeater, instructing said at least one second repeater (104, 204) to measure on the radio signal. The first node receives measurement data of the radio signal, measured by said at least one second repeater (104, 204). The first node (101) determines radio characteristics of the radio link between the first repeater (103, 203) and said at least one second repeater based on the measurement data. Methods and arrangements in a first and second repeater and a method and arrangement in a second node for contributing to radio characteristics determination are provided.

    ENHANCING OUTAGE CAPACITY BASED ON ADAPTIVE MODE SWITCHING BETWEEN ON-FREQUENCY AND FREQUENCY TRANSLATION
    4.
    发明公开
    ENHANCING OUTAGE CAPACITY BASED ON ADAPTIVE MODE SWITCHING BETWEEN ON-FREQUENCY AND FREQUENCY TRANSLATION 有权
    增大基于ADAPTIVMODUSUMSCHALTUNG之间的频率和频率转换容量损失

    公开(公告)号：EP2359624A1

    公开(公告)日：2011-08-24

    申请号：EP08876285.1

    申请日：2008-11-12

    申请人： Telefonaktiebolaget L M Ericsson (publ)

    发明人： LARSSON, Peter ,  FRENGER, Pål ,  BALDEMAIR, Robert ,  JOHANSSON, Niklas

    IPC分类号： H04W16/26

    CPC分类号： H04W72/085 ,  H04B7/15557 ,  H04W84/047

    摘要： A method includes determining channel quality feedback information characterizing the channels statistically and calculating, based on the channel quality feedback information, a robustness related measure, such as outage capacity, associated with an on- frequency mode of operation and a robustness related measure, such as an outage capacity, associated with a frequency translated mode of operation. The method includes selecting the on-frequency mode of operation or the frequency translated mode of operation that maximizes the robustness related measure, such as outage capacity. The method also includes transmitting a message to other devices to operate in the selected on-frequency or a frequency translated modes. The method also includes performing maximum ratio combining or interference rejection combining, by at least one of the other devices, when the message indicates to operate in the frequency translated mode.

    METHODS AND ARRANGEMENTS IN A WIRELESS COMMUNICATION SYSTEM FOR PRODUCING SIGNAL STRUCTURE WITH CYCLIC PREFIX
    6.
    发明公开
    METHODS AND ARRANGEMENTS IN A WIRELESS COMMUNICATION SYSTEM FOR PRODUCING SIGNAL STRUCTURE WITH CYCLIC PREFIX 有权
    方法和安排无线通信系统，用来产生信号结构具有循环前缀

    公开(公告)号：EP2286562A1

    公开(公告)日：2011-02-23

    申请号：EP08767178.0

    申请日：2008-06-13

    申请人： Telefonaktiebolaget L M Ericsson (publ)

    发明人： LARSSON, Peter ,  SAHLIN, Henrik

    IPC分类号： H04L27/26

    CPC分类号： H04L27/2607 ,  H04L1/0079 ,  H04L27/2662

    摘要： The present invention relates to methods and arrangements in a wireless communication system supporting cyclic-prefix insertion, using a symbol sequence comprising a number of samples for transmission over a radio channel that enables the handling of very large signal delay spreads. The symbol sequence is built up by a first symbol with CP and a second symbol with CP. The second symbol is a copy of the first symbol with the samples shifted in a way that makes the two adjacent symbols with CP match in regards to the sample order. The symbol sequence may also comprise a third symbol with CP or more, where the third symbol is a copy of the second symbol and with the samples shifted in analogy with the symbol shift described above. The resulting symbol sequence will thus appear as an extended continuous symbol thanks to the precise cyclic shift that matches adjacent symbols. This allows the receiver to place its FFT window anywhere during the extended symbol, e.g. at the end of the symbol sequence thus making it possible to handle a delay spread longer than the CP duration. It also allows to place e.g. two FFT windows and to combine the extracted signal into one SNR improved signal, while still handling a longer delay spread.

    PACKET LOSS TOLERANT RESHAPING METHOD
    8.
    发明公开
    PACKET LOSS TOLERANT RESHAPING METHOD 有权
    数据包丢失PEACE-RE成形方法

    公开(公告)号：EP1197044A1

    公开(公告)日：2002-04-17

    申请号：EP00946679.8

    申请日：2000-06-29

    申请人： Telefonaktiebolaget L M Ericsson (Publ)

    发明人： LARSSON, Mikael ,  LARSSON, Peter ,  LJUNGGREN, Per

    IPC分类号： H04L12/56 ,  H04Q11/04

    CPC分类号： H04L12/5602 ,  H04L2012/5647 ,  H04L2012/5649 ,  H04L2012/568 ,  H04Q11/0478

    摘要： A reshaper is provided in a DLC (Data Link Control) layer of a WLAN (Wireless Local Area Network) system. The system can be configured to support various link and network protocols such as ATM (Asynchronous Transfer Mode), Ethernet and IP (Internet Protocol). The DLC reshaper overcomes time distortion of a stream of packets or cells that is introduced as the stream passes through the WATM, by restoring or maintaining proper time intervals between packets or cells in a stream. Thus, an output stream of packets or cells from the DLC reshaper is not slipped or shifted in phase, and does not include jitters. The DLC reshaper uses ARQ (Automatic Repeat Request) sequence numbers of the packets or cells to detect when one or more packets are discarded or lost. The DLC reshaper can determine time intervals for packets or cells in a stream based on a PCR (Peak Cell Rate) for the connection that is being supported, and ARQ sequence numbers of the packets or cells. The DLC reshaper can also determine specific transmission times for the packets or cells in the stream, based on the PCR, the ARQ sequence numbers, and a reference time such as a transmission time of a first packet or cell.

    METHOD AND APPARATUS FOR POWER SAVING IN A MOBILE TERMINAL WITH ESTABLISHED CONNECTIONS
    9.
    发明公开
    METHOD AND APPARATUS FOR POWER SAVING IN A MOBILE TERMINAL WITH ESTABLISHED CONNECTIONS 有权
    方法节能与现有连接的移动设备

    公开(公告)号：EP1104638A1

    公开(公告)日：2001-06-06

    申请号：EP99943543.1

    申请日：1999-07-27

    申请人： Telefonaktiebolaget L M Ericsson (Publ)

    发明人： LARSSON, Mikael ,  LARSSON, Peter

    IPC分类号： H04Q7/32 ,  H04B1/16 ,  H04L12/56

    CPC分类号： H04B1/1615 ,  H04W24/00 ,  H04W52/0216 ,  H04W52/0219 ,  H04W68/00 ,  Y02D70/142 ,  Y02D70/40

    摘要： Power consumption of a mobile terminal is reduced by providing a system wherein a base station specifies a time period, at the end of which a mobile terminal that is hibernating in a power-saving mode will listen for paging messages from the base station. If no paging messages are present, then the mobile terminal continues hibernating, thus conserving battery power by not communicating with the base station. Either the base station or the mobile terminal can initiate a process to transfer the mobile terminal from an awake mode to a hibernating mode. In accordance with another embodiment of the invention for use in systems that require frequent connectivity testing, an agent can be provided within the base station to answer connectivity test inquiries on behalf of the mobile terminal. The mobile terminal can communicate periodically with the base station to update information that the agent uses to respond to the test inquiries.