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    Spectrum Efficiency for Uplink Wireless Communications
    1.
    发明申请
    Spectrum Efficiency for Uplink Wireless Communications 审中-公开

    公开(公告)号：US20170265191A1

    公开(公告)日：2017-09-14

    申请号：US15067380

    申请日：2016-03-11

    Applicant: Nokia Technologies Oy

    Inventor： Wessam Afifi Ahmed ,  Enrico-Henrik Rantala ,  Eric Torkildson ,  Sayantan Choudhury ,  Esa Juhani Tuomaala

    IPC: H04W72/04 ,  H04W74/08

    CPC classification number: H04W72/0453 ,  H04W72/10 ,  H04W74/0808 ,  H04W74/0875

    Abstract: A wireless network having one or more access points and one or more stations may improve spectrum efficiency for uplink transmissions by assigning a plurality of stations to a channel (or subchannel), each with a different priority. A channel may be assigned to a first station with the first priority, a second station with a second priority, and so on (e.g., instead of assigning the channel to just one station). An access point may transmit information indicative of the channel assignments, priorities, and other information used by stations to perform uplink transmissions. If a station with the highest priority receives the data from the access point, it may start transmission. A station with a lower priority may listen, during a listening period, to the same channel and determine whether the higher priority station started transmission during the listening period. If the higher priority station did not start transmission during the listening period, the lower priority station may transmit uplink data to the access point.

    Fairness In Wireless Networks With Adaptive Clear Channel Assessment Thresholds
    3.
    发明申请
    Fairness In Wireless Networks With Adaptive Clear Channel Assessment Thresholds 审中-公开
    无线网络中的公平性，具有自适应清除信道评估阈值

    公开(公告)号：US20170079068A1

    公开(公告)日：2017-03-16

    申请号：US15248029

    申请日：2016-08-26

    Applicant: Nokia Technologies Oy

    Inventor： Wessam Afifi Ahmed ,  Enrico-Henrik Rantala ,  Esa Juhani Tuomaala ,  Sayantan Choudhury

    IPC: H04W74/08

    CPC classification number: H04W74/0816 ,  H04W84/12

    Abstract: When contending for access to a radio channel (for example CSMA/CA in Wi-Fi), an apparatus selects a first clear channel assessment (CCA) threshold that is higher than a minimum; determines to temporarily use a second CCA threshold that is lower than the first CCA threshold; and based on this determination it selects the second CCA threshold for a specified time period. In one embodiment this determination is based on the apparatus' use of a spectrum relative to a threshold usage level which may be calculated as a number of successful transmissions by the apparatus on the spectrum over a predefined time period; and/or as a deferring time experienced by the apparatus with respect to the spectrum over a predefined time period. In an embodiment the specified time period comprises a backoff time, and the determination to temporarily use the second CCA threshold is triggered by a periodic timer.

    Abstract translation: 当竞争访问无线电信道（例如Wi-Fi中的CSMA / CA）时，设备选择高于最小值的第一清除信道评估（CCA）阈值; 确定临时使用低于第一CCA阈值的第二CCA阈值; 并且基于该确定，它选择指定时间段的第二CCA阈值。 在一个实施例中，该确定是基于装置对相对于阈值使用水平的频谱的使用，阈值使用水平可以被计算为装置在预定时间段内在频谱上的成功传输的数量; 和/或作为设备在预定时间段内相对于频谱经历的延迟时间。 在一个实施例中，指定的时间段包括退避时间，并且临时使用第二CCA阈值的确定由周期性定时器触发。

    Managing operation during absence in wireless network
    6.
    发明授权
    Managing operation during absence in wireless network 有权

    公开(公告)号：US10430734B2

    公开(公告)日：2019-10-01

    申请号：US15529854

    申请日：2014-11-27

    Applicant: Nokia Technologies Oy

    Inventor： Jarkko Kneckt ,  Mika Kasslin ,  Janne Marin ,  Olli Alanen ,  Enrico-Henrik Rantala

    IPC: H04W52/02 ,  G06Q10/06 ,  H04W84/12

    Abstract: This document discloses a solution where power management of devices of a wireless networks are controlled in connection with an absence period. According to an aspect, an apparatus determines at least one allowable power management mode for at least a second apparatus; causes transmission of a first frame indicating the at least one allowable power management mode; and causes transmission of an indication of an absence period during which it is not possible to transfer frames with the apparatus, wherein the indication is provided in at least one of the first frame and a second frame. The first frame configures at least the second apparatus to be ready to communicate with the apparatus at the end of the absence period in a case where the at least one allowable power management mode indicates a first power management mode.

    Sensitivity tuning in wireless networks
    7.
    发明授权
    Sensitivity tuning in wireless networks 有权

    公开(公告)号：US10142996B2

    公开(公告)日：2018-11-27

    申请号：US14791295

    申请日：2015-07-03

    Applicant: Nokia Technologies Oy

    Inventor： Sarabjot Singh ,  Sayantan Choudhury ,  Enrico-Henrik Rantala ,  Namyoon Lee ,  Esa Juhani Tuomaala

    IPC: H04W72/08 ,  H04W74/08

    Abstract: An access point in a random access wireless network is presented, which performs medium access control for transmissions from a plurality of stations to the access point using a carrier sense multiple access protocol. The CSMA protocol is based on the access point having a variable sensitivity level to detecting other transmissions on a wireless channel in order to avoid data collisions. In a dense network environment, the sensitivity level can be reduced to avoid detecting transmissions to other access points, and thus improve area efficiency.

    Fairness in wireless networks with adaptive clear channel assessment thresholds
    9.
    发明授权
    Fairness in wireless networks with adaptive clear channel assessment thresholds 有权

    公开(公告)号：US10123352B2

    公开(公告)日：2018-11-06

    申请号：US15248029

    申请日：2016-08-26

    Applicant: Nokia Technologies Oy

    Inventor： Wessam Afifi Ahmed ,  Enrico-Henrik Rantala ,  Esa Juhani Tuomaala ,  Sayantan Choudhury

    IPC: H04W74/08 ,  H04W84/12

    Abstract: When contending for access to a radio channel (for example CSMA/CA in Wi-Fi), an apparatus selects a first clear channel assessment (CCA) threshold that is higher than a minimum; determines to temporarily use a second CCA threshold that is lower than the first CCA threshold; and based on this determination it selects the second CCA threshold for a specified time period. In one embodiment this determination is based on the apparatus' use of a spectrum relative to a threshold usage level which may be calculated as a number of successful transmissions by the apparatus on the spectrum over a predefined time period; and/or as a deferring time experienced by the apparatus with respect to the spectrum over a predefined time period. In an embodiment the specified time period comprises a backoff time, and the determination to temporarily use the second CCA threshold is triggered by a periodic timer.

    Spectrum efficiency for uplink wireless communications
    10.
    发明授权
    Spectrum efficiency for uplink wireless communications 有权

    公开(公告)号：US11019621B2

    公开(公告)日：2021-05-25

    申请号：US15067380

    申请日：2016-03-11

    Applicant: Nokia Technologies Oy

    Inventor： Wessam Afifi Ahmed ,  Enrico-Henrik Rantala ,  Eric Torkildson ,  Sayantan Choudhury ,  Esa Juhani Tuomaala

    IPC: H04W72/04 ,  H04W72/10 ,  H04W74/08

    Abstract: A wireless network having one or more access points and one or more stations may improve spectrum efficiency for uplink transmissions by assigning a plurality of stations to a channel (or subchannel), each with a different priority. A channel may be assigned to a first station with the first priority, a second station with a second priority, and so on (e.g., instead of assigning the channel to just one station). An access point may transmit information indicative of the channel assignments, priorities, and other information used by stations to perform uplink transmissions. If a station with the highest priority receives the data from the access point, it may start transmission. A station with a lower priority may listen, during a listening period, to the same channel and determine whether the higher priority station started transmission during the listening period. If the higher priority station did not start transmission during the listening period, the lower priority station may transmit uplink data to the access point.

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