-
公开(公告)号：US07046967B2
公开(公告)日：2006-05-16
申请号：US10138238
申请日：2002-05-03
IPC分类号： H04B1/00
CPC分类号： H04W52/221 , H04W52/223 , H04W52/225
摘要： Improved adjustment of transmission power in a communication system is provided. In one embodiment, in a point to multipoint communication system, transmission power of a subscriber unit is controlled based on power measurements made at a central access point. Power measurement information based on transmissions occurring at irregular intervals may be combined in a beneficial manner to control transmission output power. In one embodiment, a power regulation process determines a series of difference values indicating the differences between desired received power level at the central access point and measured received power level. A smoothing process is applied to the difference values. One or more parameters of the smoothing process vary with elapsed time since a last available power measurement.
-
公开(公告)号：US07327753B2
公开(公告)日：2008-02-05
申请号：US10171816
申请日：2002-06-14
IPC分类号： H04L12/413
CPC分类号： H04W28/065 , H04L1/0056 , H04L69/32 , H04W28/18 , H04W48/08 , H04W52/08 , H04W52/146 , H04W52/46 , H04W74/085 , H04W88/02
摘要： Systems and methods are provided for transferring physical layer control information from a central access point to individual subscriber units while maintaining transparency to higher layers. Adaptation of wireline MAC protocols to wireless applications is greatly facilitated. Subscriber unit power level may be controlled from the central access point.
摘要翻译： 提供了系统和方法，用于将物理层控制信息从中央接入点传送到各个用户单元，同时保持对较高层的透明度。 有线MAC协议对无线应用的适应性极大地促进了。 订户单元功率级别可以从中央接入点进行控制。
-
3.发明授权公开(公告)号：US06788950B1
公开(公告)日：2004-09-07
申请号：US09348645
申请日：1999-07-06
IPC分类号： H04B700
CPC分类号： H04W52/50 , H04W52/223 , H04W52/60
摘要： Systems and methods for controlling subscriber unit power level using power measurements made on access request transmissions. Since a subscriber unit access request typically precedes a subscriber unit data transmission by a relatively short period of time, the data transmission power level will then be based on a recent power measurement. The access request may also trigger a sequence of power control steps including the transmission of special upstream power measurement transmissions which can be used as the basis for even more accurate power control. These power control features are particularly useful in fading environments such as found in a wireless system.
摘要翻译： 使用在接入请求传输上进行的功率测量来控制用户单元功率电平的系统和方法。 由于用户单元访问请求通常在用户单元数据传输之前相对较短的时间段，所以数据传输功率电平将基于最近的功率测量。 访问请求还可以触发一系列功率控制步骤，包括传输特殊的上行功率测量传输，这些传输可以用作更精确的功率控制的基础。 这些功率控制特征在诸如无线系统中的衰落环境中特别有用。
-
公开(公告)号：US06408165B1
公开(公告)日：2002-06-18
申请号：US09348719
申请日：1999-07-06
IPC分类号： H04B100
CPC分类号： H04W52/221 , H04W52/223 , H04W52/225
摘要： Improved adjustment of transmission power in a communication system is provided. In one embodiment, in a point to multipoint communication system, transmission power of a subscriber unit is controlled based on power measurements made at a central access point. Power measurement information based on transmissions occurring at irregular intervals may be combined in a beneficial manner to control transmission output power. In one embodiment, a power regulation process determines a series of difference values indicating the differences between desired received power level at the central access point and measured received power level. A smoothing process is applied to the difference values. One or more parameters of the smoothing process vary with elapsed time since a last available power measurement.
-
公开(公告)号：US07483444B2
公开(公告)日：2009-01-27
申请号：US10913946
申请日：2004-08-06
摘要： Systems and methods for efficiently transmitting power level information in a point to multipoint wireless system. Multiple subscriber units may transmit indications of their power level within a shared burst where one or more subchannels are allocated to each subscriber unit. The burst holding the power level information may be understood by the MAC layer to be a data burst. In this way, a wireline MAC protocol may be applied to wireless applications.
摘要翻译： 在点对多点无线系统中有效传输功率电平信息的系统和方法。 多个用户单元可以在共享脉冲串内发送其功率电平的指示，其中一个或多个子信道被分配给每个用户单元。 保持功率电平信息的突发可以被MAC层理解为数据突发。 以这种方式，有线MAC协议可以应用于无线应用。
-
6.发明授权公开(公告)号：US07065378B1
公开(公告)日：2006-06-20
申请号：US10852861
申请日：2004-05-24
CPC分类号： H04W52/50 , H04W52/223 , H04W52/60
摘要： Systems and methods for controlling subscriber unit power level using power measurements made on access request transmissions. Since a subscriber unit access request typically precedes a subscriber unit data transmission by a relatively short period of time, the data transmission power level will then be based on a recent power measurement. The access request may also trigger a sequence of power control steps including the transmission of special upstream power measurement transmissions which can be used as the basis for even more accurate power control. These power control features are particularly useful in fading environments such as found in a wireless system.
摘要翻译： 使用在接入请求传输上进行的功率测量来控制用户单元功率电平的系统和方法。 由于用户单元访问请求通常在用户单元数据传输之前相对较短的时间段，所以数据传输功率电平将基于最近的功率测量。 访问请求还可以触发一系列功率控制步骤，包括传输特殊的上行功率测量传输，这些传输可以用作更精确的功率控制的基础。 这些功率控制特征在诸如无线系统中的衰落环境中特别有用。
-
公开(公告)号：US06795426B1
公开(公告)日：2004-09-21
申请号：US09603237
申请日：2000-06-23
IPC分类号： H04J300
摘要： Systems and methods for efficiently transmitting power level information in a point to multipoint wireless system. Multiple subscriber units may transmit indications of their power level within a shared burst where one or more subchannels are allocated to each subscriber unit. The burst holding the power level information may be understood by the MAC layer to be a data burst. In this way, a wireline MAC protocol may be applied to wireless applications.
摘要翻译： 在点对多点无线系统中有效传输功率电平信息的系统和方法。 多个用户单元可以在共享脉冲串内发送其功率电平的指示，其中一个或多个子信道被分配给每个用户单元。 保持功率电平信息的突发可以被MAC层理解为数据突发。 以这种方式，有线MAC协议可以应用于无线应用。
-
公开(公告)号：US06430193B1
公开(公告)日：2002-08-06
申请号：US09348647
申请日：1999-07-06
IPC分类号： H04L12413
CPC分类号： H04W28/065 , H04L1/0056 , H04L69/32 , H04W28/18 , H04W48/08 , H04W52/08 , H04W52/146 , H04W52/46 , H04W74/085 , H04W88/02
摘要： Systems and methods are provided for transferring physical layer control information from a central access point to individual subscriber units while maintaining transparency to higher layers. Adaptation of wireline MAC protocols to wireless applications is greatly facilitated. Subscriber unit power level may be controlled from the central access point.
摘要翻译： 提供了系统和方法，用于将物理层控制信息从中央接入点传送到各个用户单元，同时保持对较高层的透明度。 有线MAC协议对无线应用的适应性极大地促进了。 订户单元功率级别可以从中央接入点进行控制。
-
公开(公告)号：US06771614B1
公开(公告)日：2004-08-03
申请号：US09348646
申请日：1999-07-06
IPC分类号： H04L12413
CPC分类号： H04W24/02 , H04B7/2612 , H04J3/0682 , H04L69/324 , H04W28/06
摘要： Systems and methods for employing digital two-way cable MAC protocols for multi-user wireless communication systems. In one embodiment, a physical layer TDMA framing structure is provided to complement the MAC layer framing. A single MAC layer frame is divided into multiple physical layer frames. The physical layer frames are divided among frames dedicated to transporting data between MAC layer entities and frames dedicated to transporting physical layer control information. Constant delay in transmission through the physical layer is preserved.
摘要翻译： 用于多用户无线通信系统的数字双向有线MAC协议的系统和方法。 在一个实施例中，提供物理层TDMA成帧结构以补充MAC层成帧。 单个MAC层帧被划分成多个物理层帧。 物理层帧在专用于在MAC层实体之间传送数据的帧和专用于传送物理层控制信息的帧之间划分。 通过物理层传输的恒定延迟得以保留。
-
公开(公告)号：US06594251B1
公开(公告)日：2003-07-15
申请号：US09348727
申请日：1999-07-06
IPC分类号： H04B7212
摘要： Systems and methods for providing enhanced subscriber unit power control in a point to multipoint communication system are provided. A central access point may send unsolicited grants of transmission time to individual subscriber units. The subscriber units use the granted transmission time to transmit upstream to the central access point for the purpose of having their output power level measured and regulated. By issuing the unsolicited grants sufficiently frequently, the central access point may maintain optimal subscriber unit transmitter power level. The power control features are particularly useful in fading environments such as found in a wireless system, especially when subscriber units do not transmit data upstream sufficiently frequently for power control to be based on measured power of data transmissions.
摘要翻译： 提供了用于在点对多点通信系统中提供增强的用户单元功率控制的系统和方法。 中央接入点可以向各个用户单元发送未经请求的传输时间许可。 用户单元使用授权的传输时间将其上行传输到中央接入点，以便测量和调节其输出功率电平。 通过足够频繁地发出主动授权，中心接入点可以保持最佳的用户单元发射机功率电平。 功率控制特征在诸如在无线系统中发现的衰落环境中特别有用，特别是当用户单元不能足够频繁地上传数据以进行功率控制时，基于测量的数据传输功率。
-
-
-
-
-
-
-
-
-
搜索结果
180 条记录 (耗时 0.03 秒)
