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    • 51. 发明申请
    • INTRA-CELL COMMON REUSE FOR A WIRELESS COMMUNICATION SYSTEM
    • 无线通信系统的内部常见重用
    • WO2005125262A1
    • 2005-12-29
    • PCT/US2005/019167
    • 2005-05-31
    • QUALCOMM IncorporatedJI, TingfangAGRAWAL, Avneesh
    • JI, TingfangAGRAWAL, Avneesh
    • H04Q7/38
    • H04W72/082H04L5/023H04W16/24H04W72/085
    • To avoid or reduce intra-cell interference, each sector of a cell is associated with a sector-specific set of system resources ( e.g ., subbands) and at least one non-overlapping common set of system resources. Each common set for each sector includes system resources observing little or no interference from at least one other sector in the cell. The channel condition for a terminal in a given sector x is ascertained based on forward and/or reverse link measurements for the terminal. The terminal is assigned system resources from a common set or a sector-specific set for sector x based on the terminal's channel condition. For example, if the terminal observes high interference from another sector γ, then the terminal is assigned system resources from a common set that observes little or no interference from sector y. The techniques may be used for an OFDMA system that uses frequency hopping.
    • 为了避免或减少小区内干扰,小区的每个扇区与系统资源(例如子带)的扇区特定集合和至少一个不重叠的公共系统资源集合相关联。 每个扇区的每个公共集合包括观察到小区中至少一个其他扇区几乎或不受干扰的系统资源。 基于终端的前向和/或反向链路测量来确定给定扇区x中的终端的信道条件。 基于终端的信道条件,从通用集或针对扇区x的扇区特定集分配终端。 例如,如果终端观察到来自另一个扇区γ的高干扰,则终端被分配来自公共集的系统资源,该公共集合观察到来自扇区y的很少或没有干扰。 这些技术可以用于使用跳频的OFDMA系统。
    • 52. 发明申请
    • SOFT HANDOFF FOR REVERSE LINK IN A WIRELESS COMMUNICATION SYSTEM WITH FREQUENCY REUSE
    • 在无线通信系统中进行反向链路的软交换
    • WO2005122628A1
    • 2005-12-22
    • PCT/US2005/020180
    • 2005-06-08
    • QUALCOMM INCORPORATEDAGRAWAL, AvneeshTEAGUE, Edward, HarrisonJI, Tingfang
    • AGRAWAL, AvneeshTEAGUE, Edward, HarrisonJI, Tingfang
    • H04Q7/38
    • H04W36/18H04W36/06
    • For soft handoff on the reverse link with restrictive reuse, a wireless terminal searches for pilots transmitted by sectors in a wireless system, measures the detected pilots, selects a serving sector (e.g., the strongest received sector), and identifies non-serving sectors that may receive high interference from the terminal. The serving sector assigns the terminal with subband(s) that are usable by the serving sector and unusable by the non-serving sectors. The terminal transmits data symbols on the assigned subbands to the serving and non-serving sectors. These sectors process the reverse link transmission from the terminal and obtain soft-decision symbols, which are estimates of the transmitted data symbols. The soft-decision symbols from co-located sectors may be combined and then decoded to obtain decoded packets. The sectors may also independently decode the soft-decision symbols, and the decoded packets from these sectors may be combined to obtain final decoded packets for the terminal.
    • 对于具有限制性重用的反向链路上的软切换,无线终端搜索无线系统中的扇区传输的导频,测量检测到的导频,选择服务扇区(例如,最强的接收扇区),并识别非服务扇区 可能会受到来自终端的高干扰。 服务扇区向终端分配可由服务扇区使用且不能由非服务扇区使用的子带。 终端将分配的子带上的数据符号发送到服务扇区和非服务扇区。 这些扇区处理来自终端的反向链路传输,并获得作为发送数据符号的估计的软判决符号。 可以组合来自同位置扇区的软判决符号,然后对其进行解码以获得解码的分组。 这些扇区还可以独立地解码软判决符号,并且可以组合来自这些扇区的解码分组以获得终端的最终解码分组。
    • 53. 发明申请
    • RESTRICTIVE REUSE FOR A WIRELESS COMMUNICATION SYSTEM
    • 无线通信系统的限制性重用
    • WO2005043948A8
    • 2005-09-15
    • PCT/US2004036285
    • 2004-10-28
    • QUALCOMM INCJI TINGFANGAGRAWAL AVNEESHTEAGUE EDWARD H
    • JI TINGFANGAGRAWAL AVNEESHTEAGUE EDWARD H
    • H04W16/10H04W16/02H04W16/12H04W72/08H04Q7/36H04Q7/38
    • H04W16/12H04W16/02H04W72/0453H04W72/082
    • For restrictive reuse, each cell (or each sector) is assigned (1) a set of usable subbands that may be allocated to users in the cell and (2) a set of forbidden subbands that is not used. The usable and forbidden sets for each cell are orthogonal to one other. The usable set for each cell also overlaps the forbidden set for each neighboring cell. A user u in a cell x may be allocated subbands in the usable set for that cell. If user u observes/causes high level of interference from/to a neighboring cell y, then user u may be allocated subbands from a "restricted" set containing subbands included in both the usable set for cell x and the forbidden set for cell y. User u would then observe/cause no interference from/to cell y. The subband restriction may be extended to avoid interference from multiple neighboring cells.
    • 对于限制性重用,分配每个小区(或每个扇区)(1)可以分配给小区中的用户的一组可用子带,以及(2)未使用的一组禁止子带。 每个单元的可用和禁止的集合彼此正交。 每个单元的可用集合也与每个相邻单元的禁止集重叠。 小区x中的用户u可以被分配给该小区的可用集合中的子带。 如果用户u观察到/来自相邻小区y的高水平的干扰,则可以从包含小区x的可用集合和小区y的禁止集合的包含子带的“限制”集合中分配用户u的子带。 用户u然后将观察/不造成来自/到小区y的干扰。 可以扩展子带限制以避免来自多个相邻小区的干扰。