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US 8,339,978 B2Granted
Wireless communication apparatus and wireless communication, and computer program
AssigneeSony Corporation
InventorsRyou Sawai, Tomoya Yamaura
Life of this patent
Estimating the term…
Abstract
A wireless communication apparatus includes a reception unit configured to receive packets in multiple formats in which two or more different types of preamble information and intra-header control information are multiplexed, a demodulation and decode unit configured to demodulate and decode the received packets, and a measurement unit configured to measure a sending end time of the reception packets by selectively referring to any one of the intra-header control information on the basis of a transmission mode supported by the demodulation and decode unit.
Claims11
A wireless communication apparatus, comprising:
- a reception unit configured to receive packets in multiple formats in which two or more different types of preamble information and intra-header control information are multiplexed;
- a demodulation and decode unit configured to demodulate and decode the received packets;
- and
- a measurement unit configured to measure a sending end time of the reception packets by selectively referring to any one of the intra-header control information on the basis of a transmission mode supported by the demodulation and decode unit, wherein
- the packets in the multiple formats are Mixed Format (MF) packets in which control information L-SIG compatible to IEEE 802.11a and control information HT-SIG not compatible to IEEE 802.11a which are specified by IEEE 802.11n are multiplexed,
- in a case where a transmission mode indicated by the control information HT-SIG is not supported by the demodulation and decode unit, the measurement unit measures the sending end time of the reception packets by using RATE information and LENGTH information indicated by the control information L-SIG, and
- in a case where a transmission mode indicated by the control information HT-SIG is not supported by the demodulation and decode unit, only when the LENGTH information indicated by the control information L-SIG is a value dividable by 3, the measurement unit estimates the sending end time of the reception packets by using the RATE information and the LENGTH information indicated by the control information L-SIG.
4 more elements
A wireless communication method for a wireless communication apparatus supporting a predetermined transmission mode, the method comprising:
- processing reception packets in multiple formats in which two or more different types of preamble information and intra-header control information are multiplexed;
- measuring a sending end time of the reception packets by selectively referring to any one of the intra-header control information when the packets are transmitted via the supported predetermined transmission mode, wherein
- the packets in the multiple formats are Mixed Format (MF) packets in which control information L-SIG compatible to IEEE 802.11a and control information HT-SIG not compatible to IEEE 802.11a which are specified by IEEE 802.11n are multiplexed,
- in a case where a transmission mode indicated by the control information HT-SIG is not supported, the measuring includes measuring the sending end time of the reception packets by using RATE information and LENGTH information indicated by the control information L-SIG, and
- in a case where a transmission mode indicated by the control information HT-SIG is not supported, only when the LENGTH information indicated by the control information L-SIG is a value dividable by 3, the measuring includes estimating the sending end time of the reception packets by using the RATE information and the LENGTH information indicated by the control information L-SIG.
2 more elements
A non-transitory computer-readable storage medium having a computer-readable program stored therein that when executed by a computer cause the computer to perform a method, the method comprising:
- receiving packets in multiple formats in which two or more different types of preamble information and intra-header control information are multiplexed;
- demodulating and decoding the received packets when the received packets are transmitted via a predetermined transmission mode;
- and
- measuring a sending end time of the reception packets by selectively referring to any one of the intra-header control information when the packets are transmitted via the predetermined transmission mode supported by the demodulating and decoding, wherein
- the packets in the multiple formats are Mixed Format (MF) packets in which control information L-SIG compatible to IEEE 802.11a and control information HT-SIG not compatible to IEEE 802.11a which are specified by IEEE 802.11n are multiplexed,
- in a case where a transmission mode indicated by the control information HT-SIG is not supported by the demodulating and decoding, the measuring includes measuring the sending end time of the reception packets by using RATE information and LENGTH information indicated by the control information L-SIG, and
- in a case where a transmission mode indicated by the control information HT-SIG is not supported by the demodulating and decoding, only when the LENGTH information indicated by the control information L-SIG is a value dividable by 3, the measuring includes estimating the sending end time of the reception packets by using the RATE information and the LENGTH information indicated by the control information L-SIG.
4 more elements
Dependencies are inferred from the claim text.