VHT-SIG-B field in null data packets (NDPs)
US8743784B2 · kind B2 · utility
10Cited by
1References
18Claims
0Family size
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Key dates
| Filing date | Aug 3, 2011 |
| Grant date | Jun 3, 2014 |
| Priority date | — |
| Expiry date | Jan 31, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L27/2613
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Certain aspects of the present disclosure relate to methods and apparatus for using information in a Very High Throughput Signal B (VHT-SIG-B) field in the preamble of a null data packet (NDP). Retaining the VHT-SIG-B field in NDPs offers several advantages, such as maintaining a unified IEEE 802.11ac preamble structure, providing for 4 μs extra time to process beamforming feedback, and being able to use information in the VHT-SIG-B field to determine a level of interference in the NDP.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.