US 8411557

US Patent 8411557: Summary

Title: Mobile station apparatus and random access method

Assignee:

• Current Assignee: Optis Wireless Technology LLC
• Original Assignee: Panasonic Corp

Inventors: Daichi Imamura, Sadaki Futagi, Atsushi Matsumoto, Takashi Iwai, Tomofumi Takata

Filing Date: December 21, 2011

Issue Date: April 2, 2013

Abstract:
The patent describes a mobile station apparatus that includes a receiving unit, a selecting unit, and a transmitting unit. The receiving unit gets control information. The selecting unit randomly chooses a sequence from a set of sequences. These sequences are organized into groups, with each group linked to different data amounts or reception qualities. The grouping is done by arranging sequences from the same base sequence with different cyclic shifts in increasing order of shifts, and then partitioning them. The way these sequences are partitioned and the number of sequences in each group vary based on the received control information. The transmitting unit then sends the selected sequence.

Plain-Language Overview of Independent Claims:

• Independent Claim 1 (Mobile station apparatus):
  This claim describes a mobile device (like a cell phone) that has three main parts:

  1. A receiver that takes in control information.
  2. A selector that randomly picks a specific signal (called a "sequence"). This signal is chosen from a larger collection of signals. This collection is organized into different categories (groups), where each category is linked to a specific data size or how well the signal is being received (reception quality). The way these signals are arranged for grouping is specific: signals that come from the same original basic signal (base sequence) and have been slightly altered (cyclic shifts) are placed in order. The method of dividing these signals into groups, including where the divisions occur and how many signals are in each group, is determined by the control information received by the device.
  3. A transmitter that sends the chosen signal.

• Independent Claim 10 (Random access method):
  This claim describes a method for a mobile device to initiate communication with a network (random access). The method involves these steps:

  1. Receiving control information.
  2. Grouping a predefined set of signals (sequences) into multiple categories (groups). Each group is associated with a different amount of data or reception quality. This grouping is performed by arranging the sequences (which are generated from several basic signals, or "base sequences," and have different cyclic shifts) in an increasing order of their cyclic shifts, and then dividing them.
  3. Randomly selecting one of these grouped sequences.
     Crucially, how the signals are divided into groups (the "partitioning position") and the number of signals within each group change based on the received control information.

CAFC 2026 Dockets:
The provided patent information does not explicitly list any CAFC dockets initiated or specifically active in 2026. However, it does indicate several cases filed in the Court of Appeals for the Federal Circuit (CAFC) in 2021 and 2022 (e.g., cases 22-1925, 22-1904, 21-1043, 21-1044). No further information regarding their status specifically in 2026 is provided in the document.