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    • 4. 发明申请
    • METHOD AND APPARATUS FOR MITIGATING TEMPORARY LOSS OF SYNCHRONIZATION IN A WIRELESS COMMUNICATION SYSTEM
    • 在无线通信系统中减少同步丢失的方法和装置
    • WO2009026557A2
    • 2009-02-26
    • PCT/US2008074095
    • 2008-08-22
    • QUALCOMM INCGOROKHOV ALEXEIAGRAWAL AVNEESHKAPOOR SAMIR
    • GOROKHOV ALEXEIAGRAWAL AVNEESHKAPOOR SAMIR
    • H04W48/00
    • H04W56/0015H04B7/2693H04J11/0069H04W48/10H04W52/143H04W92/10
    • Techniques for mitigating temporary loss of synchronization in a wireless communication system are described. In an aspect, a cell may periodically broadcast a mode indicator to indicate synchronous operation or asynchronous operation by the cell. The cell may also broadcast its cell identity (ID), which may omit the mode indicator and would then remain unchanged when the cell switches between asynchronous and synchronous operation. In another aspect, the cell may send system time information indicative of its updated system time when switching from asynchronous operation to synchronous operation. The updated system time may be used for communication with terminals after the switch to synchronous operation. In yet another aspect, the cell may decrease its transmit power prior to switching synchronization mode, switch synchronization mode when its transmit power reaches a predetermined power level, and thereafter increase its transmit power.
    • 描述了用于减轻无线通信系统中的同步暂时丢失的技术。 在一方面,小区可以周期性地广播模式指示符以指示小区的同步操作或异步操作。 小区还可以广播其小区身份(ID),其可以省略模式指示符,并且在小区在异步和同步操作之间切换时将保持不变。 另一方面,当从异步操作切换到同步操作时,小区可以发送指示其更新的系统时间的系统时间信息。 在切换到同步操作之后,更新的系统时间可以用于与终端的通信。 在另一方面,小区可以在切换同步模式之前降低其发射功率,当其发射功率达到预定功率电平时,切换同步模式,然后增加其发射功率。
    • 6. 发明申请
    • METHODS AND APPARATUS FOR DOWNLINK MACRO-DIVERSITY IN CELLULAR NETWORKS
    • 细胞网络下行宏观分析的方法与装置
    • WO2004068739A1
    • 2004-08-12
    • PCT/US2003/035256
    • 2003-11-05
    • FLARION TECHNOLOGIES, INC.CORSON, M., ScottKAPOOR, SamirLAROIA, RajivPARK, Vincent
    • CORSON, M., ScottKAPOOR, SamirLAROIA, RajivPARK, Vincent
    • H04B7/216
    • H04W84/12H04W24/00H04W36/18
    • The invention described herein enables a form of downlink macro-diversity in packet-switched cellular networks. It allows packets (650, 650', 652, 652', 654, 654', 656, 656', 658, 658', 660, 660', 662) to be selectively delivered from a network/internetwork to an end node (200), e.g., wireless communication device or terminal, over a set of available link-layer connections (402, 502) to/from the end node (200), through one or more access nodes (300, 300'), e.g., base stations. Downlink macro-diversity is particularly important when the link layer connections (402, 502) between the end node (200) and the corresponding access node (300, 300'), e.g., the access links, are subject to independent or partially correlated time variations in signal strength and interference. In accordance with the invention, the end node (200) dynamically selects a downlink (402, 502) to be used out of a set of available access links on a per packet basis subject to prevailing channel conditions, availability of air­link resources and other constraints. The invention improves the robustness and efficiency of communication, overall utilization of air-link resources, and quality of service experienced by the end node (200).
    • 本文描述的本发明使得能够在分组交换蜂窝网络中形成下行链路宏分集。 它允许分组(650,650',652,652,654,654,658,660,660',662)被选择性地从网络/互联网传送到终端节点( 200),例如无线通信设备或终端,通过一组或多个接入节点(300,300'),通过一组可用的链路层连接(402,502)到/从终端节点(200) 基站 当终端节点(200)和相应接入节点(300,300')之间的链路层连接(402,502)(例如,接入链路)经受独立或部分相关时间时,下行链路宏分集尤其重要 信号强度和干扰的变化。 根据本发明,终端节点(200)根据主要的信道条件,空中链路资源的可用性和其他约束,以每个分组动态地选择要从一组可用接入链路中使用的下行链路(402,502) 。 本发明提高了通信的鲁棒性和效率,空中链路资源的整体利用以及终端节点(200)所经历的服务质量。
    • 8. 发明申请
    • CONFIGURABLE DOWNLINK AND UPLINK CHANNELS IN A WIRELESS COMMUNICATION SYSTEM
    • 无线通信系统中的可配置下行链路和上行链路
    • WO2008008920A2
    • 2008-01-17
    • PCT/US2007/073400
    • 2007-07-12
    • QUALCOMM INCORPORATEDKAPOOR, SamirLI, JunyiLAROIA, Rajiv
    • KAPOOR, SamirLI, JunyiLAROIA, Rajiv
    • H04Q7/38
    • H04W36/06H04L5/14H04W72/02
    • Transmission techniques using configurable channels for the downlink and/or uplink are described. In one aspect, the downlink channel and/or uplink channel may be independently selected for a terminal. The terminal may establish a connection with a base station on default downlink and uplink channels. Another downlink channel and/or another uplink channel may be selected based on various factors such as channel quality, loading, and interference. The terminal would then switch to the new downlink and/or uplink channel for communication. In another aspect, the base stations broadcast sector information used by the terminals for communication and/or channel selection. The sector information may include various types of information such as the available downlink and uplink channels, the frequencies of the available channels, the loading on the available channels, and QoS information. The terminals may select a sector, a downlink channel, and/or an uplink channel based on the sector information.
    • 描述了使用用于下行链路和/或上行链路的可配置信道的传输技术。 在一个方面,可以为终端独立地选择下行链路信道和/或上行链路信道。 终端可以在默认下行链路和上行链路信道上建立与基站的连接。 可以基于诸如信道质量,加载和干扰的各种因素来选择另一个下行链路信道和/或另一个上行链路信道。 终端然后将切换到用于通信的新的下行链路和/或上行链路信道。 在另一方面,基站广播由终端用于通信和/或信道选择的扇区信息。 扇区信息可以包括各种类型的信息,例如可用的下行链路和上行链路信道,可用信道的频率,可用信道上的负载和QoS信息。 终端可以基于扇区信息来选择扇区,下行链路信道和/或上行链路信道。