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The patent EP3220562 was granted to Nokia Solutions And Networks on May 1, 2019. The application was filed on Oct 2, 2007 under application number EP17163537A. The patent is currently recorded with a legal status of "Opposition Rejected".
Flexible allocation of preamble sequences for random access in cellular networks like LTE. The method involves cyclically interpreting the ordered sequence set, starting from a root sequence index and including its cyclic shifts. This allows reuse of sequences beyond the initial 64, as sequences are considered consecutive even if they're actually gaps in the numbering. The ordering scheme involves dividing sequences by cubic metric, then further by high mobility cell size for the lower metric group. This allows flexible allocation of sequences with varying coverage potential.

Patent oppositions filed by competitors challenge the validity of a granted patent. These oppositions are typically based on claims of prior art, lack of novelty, or non-obviousness. They are a key part of the process for determining a patent's strength and enforceability.
Patent citations refer to prior patents cited during different phases such as opposition or international search.
The dossier documents provide a comprehensive record of the patent's prosecution history - including filings, correspondence, and decisions made by patent offices - and are crucial for understanding the patent's legal journey and any challenges it may have faced during examination.
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