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51.
公开(公告)号:US20050135291A1
公开(公告)日:2005-06-23
申请号:US10964320
申请日:2004-10-13
申请人: John Ketchum , Jay Walton , Sanjiv Nanda
发明人: John Ketchum , Jay Walton , Sanjiv Nanda
CPC分类号: H04W72/1273 , H04L29/06 , H04L69/08 , H04L69/24 , H04W28/065
摘要: Embodiments addressing MAC processing for efficient use of high throughput systems are disclosed. In one aspect, a protocol stack is disclosed comprising one or more of the following: an adaptation layer, a data link control layer, a physical layer, and a layer manager. In another aspect, physical layer feedback is used for adaptation layer processing. In one embodiment, physical layer feedback is used for segmentation. In another embodiment, physical layer feedback is used for multicast mapping onto one or more unicast channels. In another aspect, a data unit for transmission from a first station to a second station comprises zero or more complete sub-data units, zero or one partial sub-data units from a prior transmission, and zero or one partial sub-data units to fill the data unit. In one embodiment, a pointer may be used to indicate the location of any complete sub-data units.
摘要翻译: 公开了解决用于高吞吐量系统的有效使用的MAC处理的实施例。 一方面,公开了一种协议栈,其包括以下一个或多个:适配层,数据链路控制层,物理层和层管理器。 在另一方面,物理层反馈用于适应层处理。 在一个实施例中,物理层反馈用于分割。 在另一个实施例中,物理层反馈用于到一个或多个单播信道上的多播映射。 在另一方面,用于从第一站到第二站的传输的数据单元包括零个或多个完整的子数据单元,来自先前传输的零个或一个部分子数据单元,以及零个或一个部分子数据单元 填写数据单元。 在一个实施例中,可以使用指针来指示任何完整的子数据单元的位置。
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52.
公开(公告)号:US20050128953A1
公开(公告)日:2005-06-16
申请号:US11045781
申请日:2005-01-27
申请人: Mark Wallace , John Ketchum , J. Walton , Steven Howard
发明人: Mark Wallace , John Ketchum , J. Walton , Steven Howard
IPC分类号: H04J99/00 , H04B7/005 , H04B7/04 , H04B7/06 , H04B7/08 , H04L1/00 , H04L1/06 , H04L1/08 , H04L1/16 , H04L5/14 , H04L12/28 , H04L12/56 , H04L25/02 , H04L25/03 , H04L27/26 , H04J11/00
CPC分类号: H04W52/50 , H04B7/0421 , H04B7/0615 , H04B7/0619 , H04B7/0669 , H04B7/0697 , H04B7/0854 , H04B17/21 , H04L1/0001 , H04L1/0003 , H04L1/0009 , H04L1/0017 , H04L1/0059 , H04L1/0061 , H04L1/0068 , H04L1/0071 , H04L1/06 , H04L1/0618 , H04L1/08 , H04L1/16 , H04L5/1469 , H04L25/0204 , H04L25/0224 , H04L25/0226 , H04L25/0242 , H04L25/0244 , H04L25/03343 , H04L27/2601 , H04L27/2602 , H04L27/261 , H04L27/2647 , H04L2001/0093 , H04L2025/03414 , H04L2025/03426 , H04W16/28 , H04W52/42
摘要: Techniques are described to calibrate the downlink and uplink channels to account for differences in the frequency responses of the transmit and receive chains at an access point and a user terminal. In one method, pilots are transmitted on the downlink and uplink channels and used to derive estimates of the downlink and uplink channel responses, respectively. Correction factors for the access point and correction factors for the user terminal are determined based on (e.g., by performing matrix-ratio computation or minimum mean square error (MMSE) computation on) the downlink and uplink channel response estimates. The correction factors for the access point and the correction factors for the user terminal are used to obtain a calibrated downlink channel and a calibrated uplink channel, which are transpose of one another. The calibration may be performed in real time based on over-the-air transmission.
摘要翻译: 描述技术来校准下行链路和上行链路信道以解决在接入点和用户终端处的发射和接收链的频率响应的差异。 在一种方法中,导频在下行链路和上行链路信道上传输,并用于分别导出下行链路和上行链路信道响应的估计。 基于(例如,通过对下行链路和上行链路信道响应估计执行矩阵比计算或最小均方误差(MMSE)计算)来确定用于接入点的校正因子和用户终端的校正因子。 用于接入点的校正因子和用户终端的校正因子被用于获得经校准的下行链路信道和被校准的上行链路信道,这些信道彼此相互转置。 可以基于空中传输实时地进行校准。
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