Patent · US Active

Methods and apparatus for partial interference reduction within wireless networks

US8295395B2 · kind B2 · utility

49Cited by

3References

28Claims

0Family size

Assignee

Apple Inc. · US

Inventors

Markus Dominik Mueck · Unterhaching, DE
Maik Bienas · Braunschweig, DE
Andreas Schmidt · Braunschweig, DE

Key dates

Filing date	Sep 30, 2008
Grant date	Oct 23, 2012
Priority date	—
Expiry date	Jul 24, 2031

Classification

Technology area (CPC H)Electricity
CPC primaryH04B2215/062
WIPO fieldDigital communication
WIPO sectorElectrical engineering

Abstract

Methods and apparatus that enable one or more wireless networks to minimize inter-cellular interference (ICI) at a receiver. In one embodiment, the network comprises an OFDM-based cellular network, and the method comprises utilizing a priori knowledge of non-data portions of signals from multiple base stations in order to schedule transmissions. In one variant, these non-data portions comprise pilot tones; the pilot tones can be scheduled onto various time-frequency resources of the network so as to minimize ICI. The mobility context of the receiver can also be used as a basis for dynamically adjusting the pilot tone density. In another variant, precoding (e.g., Tomlinson-Harashima preceding) can be applied to “shape” the non-data portions of the transmitted signals so as to mitigate ICI. In yet other variants, frame preambles and learning sequences are used as the basis for invoking selective transmission time shifts across the potentially interfering base stations so as to minimize ICI.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.