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    • 11. 发明授权
    • Dynamic coverage adjustment in a multi-carrier communication system
    • 多载波通信系统中的动态覆盖调整
    • US08583137B2
    • 2013-11-12
    • US12466090
    • 2009-05-14
    • Ramin RezaiifarPeter J. Black
    • Ramin RezaiifarPeter J. Black
    • H04W72/00H04W40/00
    • H04W52/241H04W52/343
    • Techniques for dynamically varying coverage in a multi-carrier communication system are described. A sector may operate on multiple carriers. The sector may vary coverage on a given carrier k based on its load, so that less interference may be caused to other sectors when the sector load is light. In one design, the sector may communicate on a first carrier at a first transmit power level and on a second carrier at a second transmit power level equal to or lower than the first transmit power level. The sector may vary the second transmit power level based on its load to vary the coverage of the second carrier. The sector may reduce the second transmit power level to zero or a low level if the sector load is light. The sector may also vary the second transmit power level based on a function of sector load or a switching pattern.
    • 描述了用于在多载波通信系统中动态变化覆盖的技术。 扇区可以在多个载波上操作。 该扇区可以基于其负载来改变给定载波k上的覆盖范围,使得当扇区负载较轻时可能对其它扇区造成更少的干扰。 在一种设计中,扇区可以在第一发射功率电平的第一载波和第二载波上以等于或低于第一发射功率电平的第二发射功率电平进行通信。 扇区可以基于其负载来改变第二发射功率电平,以改变第二载波的覆盖范围。 如果扇区负载较轻,扇区可将第二发射功率电平降低至零或低电平。 扇区还可以基于扇区负载或切换模式的功能来改变第二发射功率电平。
    • 12. 发明授权
    • Increasing capacity in wireless communications
    • 增加无线通信的容量
    • US09408165B2
    • 2016-08-02
    • US12424019
    • 2009-04-15
    • Yu-Cheun JouPeter J. BlackRashid Ahmed A. Attar
    • Yu-Cheun JouPeter J. BlackRashid Ahmed A. Attar
    • H04L12/26H04W52/44H04L1/18H04W52/58H04L1/16H04L1/00
    • H04W52/44H04B2201/709709H04L1/0002H04L1/0025H04L1/0027H04L1/0029H04L1/0045H04L1/1607H04L1/1854H04L1/1887H04L2001/0092H04W52/58
    • Techniques to increase capacity in a wireless communications system. In an aspect, systematic non-transmission, or “blanking,” of minimal-rate frames transmitted in a communications system is provided. In an exemplary embodiment, eighth rate frames in a cdma2000 voice communications system are systematically substituted with null-rate frames carrying zero traffic bits. Provisions are nevertheless made for the transmission of certain designated as “critical” by, e.g., a vocoder. The receiver detects the presence of null rate or non-null rate transmissions and processes the received frames accordingly, including updating an outer loop power control only in response to non-null rate frames. Further techniques for changing the pilot transmission gating pattern to assist the receiver in detecting null rate frames are provided. In another aspect, early termination of a signal transmission over a wireless communications link is provided. In an exemplary embodiment, a base station (BS) transmits power control groups (PCG's) for a frame over a forward link (FL) to a mobile station (MS) until accurate reception of the frame is acknowledged by the MS over a reverse link (RL), possibly before all PCG's of the frame are received over the FL. Possible ACK signaling methods are defined for channels associated with a cdma2000 wireless communications system. In another exemplary embodiment, techniques for reverse link early termination are also provided.
    • 提高无线通信系统容量的技术。 在一方面,提供了在通信系统中传输的最小速率帧的系统非传输或“消隐”。 在示例性实施例中,cdma2000语音通信系统中的第八速率帧被系统地替换为带有零业务位的零速率帧。 然而,对于由例如声码器指定为“关键”的某些设备进行了规定。 接收机检测到零速率或非零速率传输的存在并相应地处理接收到的帧,包括仅响应于非空速率帧来更新外部环路功率控制。 提供了用于改变导频传输门控模式以辅助接收机检测零速率帧的其它技术。 在另一方面,提供了通过无线通信链路的信号传输的提前终止。 在示例性实施例中,基站(BS)通过前向链路(FL)向移动站(MS)发送用于帧的功率控制组(PCG),直到MS通过反向链路确认帧的准确接收 (RL),可能在帧的所有PCG之前都被接收到FL。 针对与cdma2000无线通信系统相关的通道定义了可能的ACK信令方法。 在另一示例性实施例中,还提供了用于反向链路提前终止的技术。
    • 13. 发明授权
    • Pilot reference transmission for a wireless communication system
    • 无线通信系统的导频参考传输
    • US09118387B2
    • 2015-08-25
    • US11858840
    • 2007-09-20
    • Roberto PadovaniPeter J. BlackNagabhushana T. Sindhushayana
    • Roberto PadovaniPeter J. BlackNagabhushana T. Sindhushayana
    • H04L12/28H04B7/26H04B1/707H04W52/32H04J1/16H04J3/06
    • H04B7/2687H04B1/707H04B2201/70701H04J3/0644H04W52/325
    • A pilot reference transmission scheme well suited for high data rate wireless communication systems is disclosed. To maximize the amount of interference from transmissions from neighboring transmission sources (e.g., access points or base stations) during the pilot interval, and hence minimize the amount of interference from non-transmitting sources during the data intervals, the pilot references are transmitted in bursts at predetermined time intervals, and the pilot bursts from the access points are synchronized. This results in maximum interference contributions from non-transmitting neighboring access points, facilitating reliable estimation of worst case carrier-to-interference (C/I), and further allows the receiving devices (e.g., access terminals) to easily recognize the bursts as pilot reference. In one embodiment, each access point transmits the pilot bursts at or near its maximum transmit power level and no user-specific data is transmitted during the pilot bursts.
    • 公开了一种非常适合高数据速率无线通信系统的导频参考传输方案。 为了在导频间隔期间使来自相邻传输源(例如,接入点或基站)的传输的干扰量最大化,并且因此在数据间隔期间最小化来自非发射源的干扰量,导频参考以突发 并且来自接入点的导频突发是同步的。 这导致来自非发射相邻接入点的最大干扰贡献,促进对最差情况下的载波干扰(C / I)的可靠估计,并且还允许接收设备(例如,接入终端)容易地将突发识别为导频 参考。 在一个实施例中,每个接入点在其最大发射功率电平处或其附近发射导频脉冲串,并且在导频突发期间不发送用户特定数据。
    • 16. 发明申请
    • METHODS AND SYSTEMS FOR VARIABLE RATE BROADCAST WITH SOFT HANDOFF
    • 具有软手动变化速率广播的方法和系统
    • US20120149379A1
    • 2012-06-14
    • US13334882
    • 2011-12-22
    • Peter J. Black
    • Peter J. Black
    • H04W36/18H04W72/04
    • H04W72/005H04W36/18
    • Embodiments described herein relate to providing variable rate broadcast services with soft handoff in wireless communications. In an embodiment, a plurality of access points (e.g., servicing various cells in a broadcast area) may transmit a broadcast content in accordance with a rate set. The rate set may include a plurality of distinct data rates each associated with a transmission format, configured to allow the broadcast packets transmitted by the access points to be incrementally combined (e.g., on a per-slot basis at a subscribing AT). The data rates and corresponding transmission formats in the rate set may be selected in relation to the supportable data rates of the cells in the broadcast area, as well as the requirements for supporting soft handoff in these cells.
    • 本文描述的实施例涉及在无线通信中提供具有软切换的可变速率广播服务。 在一个实施例中,多个接入点(例如,为广播区域中的各个小区提供服务)可以根据速率集合发送广播内容。 速率设置可以包括每个与传输格式相关联的多个不同的数据速率,其被配置为允许由接入点发送的广播分组被增量地组合(例如,在订阅的AT以每个时隙为基础)。 可以相对于广播区域中的小区的可支持数据速率以及在这些小区中支持软切换的要求来选择速率集合中的数据速率和相应的传输格式。