Uplink Scrambling During Random Access
Patent No. EP4277422 (titled "Uplink Scrambling During Random Access") was filed by Telefonaktiebolaget LM Ericsson Publ on Jul 3, 2008. The application was issued on Dec 11, 2024.
Patent Summary
LTE random access procedure that uses cell-specific scrambling for initial messages to prevent interference before a terminal identity is assigned. The base station sends a timing advance and resource grant in the response, allowing the terminal to adjust its uplink timing and transmit a third message with its temporary ID. This third message is scrambled using a cell-specific sequence rather than a unique one, enabling multiple users to share resources without collision. Once the base station confirms the identity, subsequent data transmissions switch to terminal-specific scrambling for better interference randomization.
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Date
Description
EP4277422
SEP- Application Number
- EP23199938A
- Filing Date
- Jul 3, 2008
- Status
- No Opposition Filed Within Time Limit
- Oct 17, 2025
- Publication Date
- Dec 11, 2024
- External Links
- Slate, Register , Google Patents