Acacia’s new weapon US 8055820: LTE standard essential patent?

Cellular Communications Equipment, a shell company of Acacia Research, sued LG electronics and its customer Telcos (AT&T, Verizon, Sprint, and T-Mobile) for patent infringement (6:13-cv-00508). Cellular Communications Equipment exploited US8055820 that is acquired from Nokia Siemens Networks. The accused devices are LG Escape 4G, LG Nitro HD, LG Optimus G, LG Optimus G Pro (AT&T); LG Intuition, LG Lucid 4G, LG Lucid 2, LG Revolution 4G, LG Spectrum 4G, LG Spectrum 2 (Verizon); LG Mach 4G LTE, LG Optimus G, LG Viper 4G LTE (Sprint); LG Connect 4G, LG Esteem 4G, LG Motion 4G, LG Spirit 4G (T-Mobile).

US8055820 is related to methods and systems for communicating buffer status reports to support uplink scheduling operations between user equipments and a mobile base station:

1. A method, comprising:

monitoring a usage of a plurality of buffers;

detecting one of a plurality of pre-selected conditions corresponding to the plurality of buffers;

designating one of a plurality of buffer status reporting formats comprising a long buffer status reporting format and a short buffer status reporting format depending on the pre-selected condition detected; and

communicating a buffer status report to a network device in accordance with the buffer status reporting format designated, wherein the designating designates the long buffer status reporting format when there is sufficient uplink bandwidth to communicate using the long buffer status reporting format.

Specifically, US8055820 covers plurality of buffer status reporting formats comprises a long buffer status reporting format and a short buffer status reporting format that are described in LTE standard specification TS36.321. The relevant part of the TS36.321 is Sec. 5.4.5 Buffer Status Reporting.

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