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    • 1. 发明授权
    • MOBILE TERMINAL DECODE FAILURE PROCEDURE IN A WIRELESS LOCAL AREA NETWORK
    • VERFAHREN BEI DEKODIERUNGSFEHLERN BEI MOBILENENDGERÄTENIN EINEM DRATHLOSEN LOKALEN NETZ
    • EP1166500B1
    • 2016-05-25
    • EP00919216.2
    • 2000-03-17
    • Telefonaktiebolaget LM Ericsson (publ)
    • LINDSKOG, JanALMEHAG, LorensMALMGREN, GöranRYDNELL, Gunnar
    • H04W52/02
    • H04W52/0216Y02D70/142
    • In accordance with embodiments of the invention, in a Wireless Local Area Network (WLAN) configured in accordance with the HIPERLAN Type 2 standard where an Access Point (AP) and Mobile Terminals (MTs) use a duplex airlink having a MAC frame structure to communicate with each other, when an MT fails to properly perceive and decode a wakeup announcement in the MAC frame that is directed to it by the AP, the MT will remain awake and continue to decode and monitor subsequent MAC frames until it either receives a wakeup announcement directed to it, or until a predetermined number of MAC frames transpire. Where the MT fails to correctly decode a wakeup announcement and/or fails to send an acknowledgment signal back to the AP when the wakeup announcement includes a polling request, the AP will continue to resend the wakeup announcement and any appropriate, associated downlink data pending for the AP, in subsequent MAC frames. The AP continues until either the MT correctly receives the wakeup announcement and responds appropriately, or until a predetermined number of MAC frames expire.
    • 根据本发明的实施例,在根据HIPERLAN类型2标准配置的无线局域网(WLAN)中,其中接入点(AP)和移动终端(MT)使用具有MAC帧结构的双工空中链路来通信 相互之间,当MT无法正确地感知和解码由AP指向的MAC帧中的唤醒通知时,MT将保持唤醒,并继续解码并监视后续MAC帧,直到它接收到唤醒通知 指向它,或者直到预定数量的MAC帧发生。 当唤醒通知包括轮询请求时,MT无法正确解码唤醒通知和/或无法将确认信号发送回AP,则AP将继续重新发送唤醒通知和任何适当的相关联的下行链路数据待处理 AP,在随后的MAC帧中。 AP继续直到MT正确地接收到唤醒通知并且适当地响应,或直到预定数量的MAC帧过期。
    • 6. 发明授权
    • METHOD AND BASE STATION FOR INTERFERENCE MEASUREMENTS
    • VERFAHREN UND BASERSTATIONFÜRINTERFERENZMESSUNGEN
    • EP1119946B1
    • 2004-09-22
    • EP99956412.3
    • 1999-10-01
    • Telefonaktiebolaget LM Ericsson (publ)
    • MALMGREN, GöranKRONESTEDT, FredricNILSSON, Lennart
    • H04L12/28H04Q7/38
    • H04W16/14H04W24/10H04W28/16H04W52/0216H04W74/04H04W76/28Y02D70/142
    • A medium access control (MAC) protocol for use in a wireless network, that efficiently supports automatic and timely frequency assignment. The MAC protocol accomplishes this by providing periodic "quiet intervals". During these intervals, all transmissions in a corresponding broadcast region are halted, thereby enabling the base station controlling the broadcast region to measure interference over a number of potential frequency carriers. The interference measurements can then be used by an automatic frequency assignment algorithm to reassign frequencies, if necessary, to the various base stations which make up the wireless network. When a base station is reassigned a new frequency, the MAC protocol also provides a period during which the base station can tune to a newly assigned frequency, and thereafter, a period during which the wireless terminals associated with the base station synchronize themselves to the base station and the generation of MAC frames over the newly assigned frequency.
    • 用于无线网络的介质访问控制(MAC)协议,可有效支持自动及时的频率分配。 MAC协议通过提供周期性的“安静间隔”来实现。 在这些间隔期间,停止相应广播区域中的所有传输,从而使得控制广播区域的基站能够测量多个潜在频率载波上的干扰。 然后,干扰测量可以由自动频率分配算法使用,如果需要,可以将频率重新分配给构成无线网络的各种基站。 当基站重新分配新的频率时,MAC协议还提供一个时间段,在该时间段期间,基站可以调谐到新分配的频率,此后,与基站相关联的无线终端同步到基站 站和在新分配的频率上生成MAC帧。