Preamble design for television white space transmissions
    25.
    发明授权
    Preamble design for television white space transmissions 有权
    电视空白传输的序言设计

    公开(公告)号:US08830815B2

    公开(公告)日:2014-09-09

    申请号:US13471947

    申请日:2012-05-15

    摘要: A method for generating a Physical Layer Convergence Protocol Packet Data Unit (PPDU) having a preamble and a payload for television white space transmission (TVWS) is provided. The symbols of the PPDU each include 128 total (orthogonal frequency-division multiplexing) OFDM tones or 256 total OFDM tones. The preamble includes a signal (SIG) field symbol having 108 OFDM data tones if the symbols of the PPDU include 128 total OFDM tones or having 234 OFDM data tones if the symbols of the PPDU include 256 total OFDM tones. The SIG field symbol indicates at least one of an amount of data in the payload or a length of time that the PPDU will occupy the television broadcast frequency spectrum. The PPDU is generated by down-clocking an 802.11ac signal by a factor so that the bandwidth of the PPDU decreases down to one appropriate for use in a TVWS channel.

    摘要翻译: 提供了一种用于产生具有用于电视白空间传输(TVWS)的前同步码和有效载荷的物理层汇聚协议分组数据单元(PPDU)的方法。 PPDU的符号各自包括128个总共(正交频分复用)OFDM音调或256个总OFDM音调。 如果PPDU的符号包括128个总OFDM音调或具有234个OFDM数据音调,如果PPDU的符号包括256个总OFDM音调,则前导码包括具有108个OFDM数据音调的信号(SIG)字段符号。 SIG字段符号指示有效载荷中的数据量或PPDU将占用电视广播频谱的时间长度中的至少一个。 PPDU是通过将802.11ac信号衰减一个因子来产生的,使得PPDU的带宽减小到适合于在TVWS信道中使用的PPDU的带宽。

    METHOD AND APPARATUS FOR COMMUNICATING WITH EXTENDED RANGE IN A WIRELESS NETWORK
    26.
    发明申请
    METHOD AND APPARATUS FOR COMMUNICATING WITH EXTENDED RANGE IN A WIRELESS NETWORK 有权
    在无线网络中与扩展范围通信的方法和装置

    公开(公告)号:US20130208607A1

    公开(公告)日:2013-08-15

    申请号:US13588351

    申请日:2012-08-17

    IPC分类号: H04W16/26

    摘要: Techniques for supporting communication over an extended range in a wireless network are disclosed. In one aspect, a station sends multiple messages of a given type for different operating modes. These messages can be detected by stations with different capabilities, which may avoid collisions between stations. In one design, a first station receives a Request-to-Send (RTS) message from a second station having data to send. The first station sends a first Clear-to-Send (CTS) message and also a second CTS message in response to the RTS message. The second CTS message has an extended range as compared to the first CTS message. The first station thereafter (i) receives data sent by the second station in response to the second CTS message and (ii) sends an acknowledgement having an extended range.

    摘要翻译: 公开了一种用于在无线网络中的扩展范围内支持通信的技术。 在一个方面,站发送给定类型的多个消息用于不同的操作模式。 这些消息可以由具有不同能力的站检测,这可以避免站之间的冲突。 在一种设计中,第一站从具有要发送的数据的第二站接收请求发送(RTS)消息。 第一站响应于RTS消息发送第一个清除发送(CTS)消息和第二个CTS消息。 与第一个CTS消息相比,第二个CTS消息具有扩展的范围。 此后,第一站(i)响应于第二CTS消息接收由第二站发送的数据,并且(ii)发送具有扩展范围的确认。

    PREAMBLE DESIGN FOR TELEVISION WHITE SPACE TRANSMISSIONS
    27.
    发明申请
    PREAMBLE DESIGN FOR TELEVISION WHITE SPACE TRANSMISSIONS 有权
    电视白空间传输的前置设计

    公开(公告)号:US20130128807A1

    公开(公告)日:2013-05-23

    申请号:US13471947

    申请日:2012-05-15

    IPC分类号: H04L12/56 H04W4/00

    摘要: A method for generating a Physical Layer Convergence Protocol Packet Data Unit (PPDU) having a preamble and a payload for television white space transmission (TVWS) is provided. The symbols of the PPDU each include 128 total (orthogonal frequency-division multiplexing) OFDM tones or 256 total OFDM tones. The preamble includes a signal (SIG) field symbol having 108 OFDM data tones if the symbols of the PPDU include 128 total OFDM tones or having 234 OFDM data tones if the symbols of the PPDU include 256 total OFDM tones. The SIG field symbol indicates at least one of an amount of data in the payload or a length of time that the PPDU will occupy the television broadcast frequency spectrum. The PPDU is generated by down-clocking an 802.11ac signal by a factor so that the bandwidth of the PPDU decreases down to one appropriate for use in a TVWS channel.

    摘要翻译: 提供了一种用于产生具有用于电视白空间传输(TVWS)的前同步码和有效载荷的物理层汇聚协议分组数据单元(PPDU)的方法。 PPDU的符号各自包括128个总共(正交频分复用)OFDM音调或256个总OFDM音调。 如果PPDU的符号包括128个总OFDM音调或具有234个OFDM数据音调,如果PPDU的符号包括256个总OFDM音调,则前导码包括具有108个OFDM数据音调的信号(SIG)字段符号。 SIG字段符号指示有效载荷中的数据量或PPDU将占用电视广播频谱的时间长度中的至少一个。 PPDU是通过将802.11ac信号衰减一个因子来产生的,使得PPDU的带宽减小到适合于在TVWS信道中使用的PPDU的带宽。

    Method and apparatus for communicating with extended range in a wireless network
    28.
    发明授权
    Method and apparatus for communicating with extended range in a wireless network 有权
    用于与无线网络中的扩展范围进行通信的方法和装置

    公开(公告)号:US09326158B2

    公开(公告)日:2016-04-26

    申请号:US13588351

    申请日:2012-08-17

    IPC分类号: H04W16/26 H04W74/08 H04J1/16

    摘要: Techniques for supporting communication over an extended range in a wireless network are disclosed. In one aspect, a station sends multiple messages of a given type for different operating modes. These messages can be detected by stations with different capabilities, which may avoid collisions between stations. In one design, a first station receives a Request-to-Send (RTS) message from a second station having data to send. The first station sends a first Clear-to-Send (CTS) message and also a second CTS message in response to the RTS message. The second CTS message has an extended range as compared to the first CTS message. The first station thereafter (i) receives data sent by the second station in response to the second CTS message and (ii) sends an acknowledgement having an extended range.

    摘要翻译: 公开了一种用于在无线网络中的扩展范围内支持通信的技术。 在一个方面,站发送给定类型的多个消息用于不同的操作模式。 这些消息可以由具有不同能力的站检测,这可以避免站之间的冲突。 在一种设计中,第一站从具有要发送的数据的第二站接收请求发送(RTS)消息。 第一站响应于RTS消息发送第一个清除发送(CTS)消息和第二个CTS消息。 与第一个CTS消息相比,第二个CTS消息具有扩展的范围。 此后,第一站(i)响应于第二CTS消息接收由第二站发送的数据,并且(ii)发送具有扩展范围的确认。