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    • 3. 发明申请
    • METHOD AND SYSTEM FOR DETECTING PERIODIC INTERMITTENT INTERFERENCE
    • 用于检测周期性间歇性干扰的方法和系统
    • US20080146172A1
    • 2008-06-19
    • US11611732
    • 2006-12-15
    • ISAM R. MAKHLOUFSTEPHEN P. EMEOTT
    • ISAM R. MAKHLOUFSTEPHEN P. EMEOTT
    • H04B1/00
    • H04B1/1027H04B17/26H04B17/345H04L1/20
    • A method (10, 40 or 70) or system (200) of detecting periodic intermittent interference (PII) can include indirect detection by tracking (14) retransmission statistics of isochronous traffic or alternatively tracking channel probe request failures corresponding to temporal characteristics of microwave oven interference. Such tracking can be done in a number of ways including tracking (16) retransmission statistics by tracking MAC layer statistics or by tracking retransmission statistics for Voice over WLAN or by tracking a number of retransmission attempts required per transmission opportunity. In another alternative, the method can track (18) success and failures of probe requests for data traffic. The tracking schemes can use correlation. The method can further introduce (28) hysteresis in the detection of the PII to prevent rapid entering and exiting from a current detection mode. The method can further operate (29) in a direct PII detection mode if the indirect detection mode indicates PII.
    • 检测周期性间歇干扰(PII)的方法(10,40或70)或系统(200)可以包括通过跟踪(14)同步业务的重传统计或者跟踪对应于微波炉的时间特性的信道探测请求故障的间接检测 干扰。 这样的跟踪可以以多种方式完成,包括通过跟踪MAC层统计跟踪(16)重传统计信息,或通过跟踪WLAN上的语音的重发统计信息,或通过跟踪每次传输机会所需的重发次数。 在另一个替代方案中,该方法可以跟踪(18)数据流量探测请求的成功和失败。 跟踪方案可以使用相关性。 该方法可以在PII的检测中进一步引入(28)滞后,以防止快速进入和退出电流检测模式。 如果间接检测模式指示PII,该方法可以在直接PII检测模式下进一步操作(29)。
    • 4. 发明申请
    • METHOD AND SYSTEM FOR PREDICTIVE SENSING OF PERIODIC INTERMITTENT INTERFERENCE
    • 用于周期性干扰的预测性感测的方法和系统
    • US20080146156A1
    • 2008-06-19
    • US11611725
    • 2006-12-15
    • ISAM R. MAKHLOUFSTEPHEN P. EMEOTT
    • ISAM R. MAKHLOUFSTEPHEN P. EMEOTT
    • H04B1/00
    • H04W74/0808
    • A method (10 or 40) or system (200) of predictive sensing of periodic intermittent interference (PII) can include the measuring (12) of energy on a channel for an indication of PII, determining (14) if a channel is currently in a PII on-cycle, and adjusting (16) a clear channel assessment threshold to a new threshold for improved sensitivity of the PII on-cycle. If a current energy level on the channel is below the new threshold and if a previous on-energy characteristic suggests that the current energy level will remain below the new threshold for a predetermined minimum period of time, then a clear channel indication can be provided (20). A busy channel indication is provided (45) when either the current energy level is above the new threshold or the previous on-energy characteristic suggests the current energy level will not remain below the threshold for predetermined minimum period of time.
    • 用于周期性间歇干扰(PII)的预测感测的方法(10或40)或系统(200)可以包括用于PII的指示的信道上的能量测量(12),确定(14)如果信道当前处于 PII on循环,并将(16)清晰的通道评估阈值调整到新的阈值,以提高PII on-cycle的灵敏度。 如果信道上的当前能量级别低于新阈值,并且如果先前的能量特性表明当前能量水平将在预定的最小时间段内保持低于新阈值,则可以提供清除信道指示( 20)。 当当前能量水平高于新阈值或先前的开启能量特性时,提供忙通道指示(45),表明当前能量水平将不会保持在预定的最小时间段内的阈值以下。
    • 5. 发明申请
    • RETRANSMISSION SCHEME FOR MAINTAINING PERFORMANCE FOR WIRELESS COMMUNICATIONS IN THE PRESENCE OF PERIODIC INTERMITTENT INTERFERENCE
    • 在存在间歇性干扰的情况下维持无线通信性能的重新设计方案
    • US20080144550A1
    • 2008-06-19
    • US11611337
    • 2006-12-15
    • ISAM R. MAKHLOUFSTEPHEN P. EMEOTT
    • ISAM R. MAKHLOUFSTEPHEN P. EMEOTT
    • H04B7/00
    • H04L1/1887H04L1/1825H04W24/00H04W28/18H04W74/08H04W84/12
    • The invention can establish a default retransmission algorithm and an interference retransmission algorithm. The default retransmission algorithm can be a Distributed Coordination Function (DCF) based algorithm implemented in a MAC layer in conformance with an IEEE 802.11 based standard. The minimum cumulative back-off time for the default transmission algorithm can be less a minimum cumulative back-off time for the interference retransmission algorithm. The minimum cumulative back-off time for the interference retransmission algorithm can be greater than an on-cycle of the PII and less than a sum of the one and off-cycles of the PII (e.g., between ˜8.3 ms and ˜16.7 ms for microwave oven generated PII). A determination can be made whether periodic intermittent interference is present. If so, the default retransmission algorithm can be automatically utilized for wireless data conveyances. When PII is present, the interference retransmission algorithm can be automatically utilized.
    • 本发明可以建立默认的重传算法和干扰重传算法。 默认重传算法可以是基于基于IEEE802.11标准的在MAC层中实现的基于分布式协调功能(DCF)的算法。 对于干扰重传算法,默认传输算法的最小累积退避时间可以较小的最小累积退避时间。 干扰重传算法的最小累积退避时间可以大于PII的接通周期,并且小于PII的一个和非周期的总和(例如,在〜8.3ms和〜16.7ms之间,对于 微波炉生成PII)。 可以确定是否存在周期性间歇干扰。 如果是这样,默认的重传算法可以自动用于无线数据传输。 当存在PII时,可以自动利用干扰重传算法。