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    • 4. 发明申请
    • METHODS AND APPARATUS FOR WLAN TRANSMISSION
    • WLAN传输的方法和设备
    • WO2011014685A2
    • 2011-02-03
    • PCT/US2010/043756
    • 2010-07-29
    • MARVELL WORLD TRADE LTD.SRINIVASA, SudhirZHANG, HongyuanNABAR, Rohit U.
    • SRINIVASA, SudhirZHANG, HongyuanNABAR, Rohit U.
    • H04L1/00
    • H04L1/0005H04L1/0016H04L27/2607H04L27/2608H04L27/34H04W84/12
    • In a method for generating a physical layer (PHY) data unit for transmission via a communication channel, a first set of modulation coding schemes (MCSs) and a second set of MCSs that correspond to a number of spatial streams and a number of encoders are provided. The first set of MCSs correspond to a first channel bandwidth and the second set of MCSs correspond to a second channel bandwidth, and the first set of MCSs is different than the second set of MCSs. An MCS is selected from the first set of MCSs when the PHY data unit is to be transmitted using a channel having the first channel bandwidth, and the MCS is selected from the second set of MCSs when the PHY data unit is to be transmitted using a channel having the second channel bandwidth. Information bits are encoded using the number of encoders and according to the selected MCS, and the encoded information bits are parsed into the number of spatial streams. The encoded information bits are modulated according to the MCS, and a plurality of OFDM symbols are formed based on the modulated encoded information bits.
    • 在用于生成经由通信信道进行传输的物理层(PHY)数据单元的方法中,与多个空间流和多个编码器相对应的第一组调制编码方案(MCS)和第二组MCS相对应, 提供。 第一组MCS对应于第一信道带宽,并且第二组MCS对应于第二信道带宽,并且第一组MCS不同于第二组MCS。 当使用具有第一信道带宽的信道来发送PHY数据单元时,从第一组MCS中选择MCS,并且当使用第一组MCS发送PHY数据单元时,从第二组MCS中选择MCS 信道具有第二信道带宽。 使用编码器的数量并根据所选择的MCS对信息比特进行编码,并将编码的信息比特解析为空间流的数量。 编码信息比特根据MCS进行调制,并且基于调制编码信息比特形成多个OFDM符号。
    • 5. 发明申请
    • PHYSICAL LAYER FRAME FORMAT FOR WLAN
    • WLAN的物理层框架格式
    • WO2010120692A1
    • 2010-10-21
    • PCT/US2010/030750
    • 2010-04-12
    • MARVELL WORLD TRADE LTD.ZHANG, HongyuanLOU, Hui-LingNABAR, Rohit, U.SRINIVASA, SudhirYU, MaoBANERJEA, Raja
    • ZHANG, HongyuanLOU, Hui-LingNABAR, Rohit, U.SRINIVASA, SudhirYU, MaoBANERJEA, Raja
    • H04L12/28H04L12/56H04L29/06H04L29/08H04W28/06H04L27/26
    • H04L1/0079H04L1/0072H04L1/009H04L27/2613H04L69/18H04W28/06H04W84/12H04W99/00
    • In a method for generating a data unit for transmission via a communication channel, wherein the data unit conforms to a first communication protocol, a preamble of the data unit is generated. The preamble includes a first field having information that indicates a duration of the data unit, the first field being formatted such that the first field is decodable by a receiver device that conforms to a second communication protocol but does not conform to the first communication protocol to determine the duration of the data unit based on the first field. Additionally, the preamble is formatted such that a portion of the preamble is decodable by a receiver device that conforms to a third communication protocol but does not conform to the first communication protocol. Also, the preamble is formatted such that a receiver device that conforms to the first communication protocol can determine that the data unit conforms to the first communication protocol. A data portion of the data unit that conforms to the first communication protocol and does not conform to either (i) the second communication protocol or (ii) the third communication protocol is generated.
    • 在通过通信信道生成用于发送的数据单元的方法中,其中数据单元符合第一通信协议,生成数据单元的前同步码。 前导码包括具有指示数据单元的持续时间的信息的第一字段,第一字段被格式化,使得第一字段可由符合第二通信协议但不符合第一通信协议的接收机设备解码, 基于第一个字段确定数据单元的持续时间。 另外,前导码被格式化,使得前导码的一部分可以由符合第三通信协议但不符合第一通信协议的接收机设备解码。 此外,前导码格式化使得符合第一通信协议的接收机设备可以确定数据单元符合第一通信协议。 产生符合第一通信协议并且不符合(i)第二通信协议或(ii)第三通信协议的数据单元的数据部分。