Preamble sequencing for random access channel in a communication system
US8000305B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 10, 2007 |
| Grant date | Aug 16, 2011 |
| Priority date | — |
| Expiry date | Sep 22, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L27/2655
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A system and method for initializing a system communication without previous reservations for random access channel (RACH) access includes a first step of defining at least one spread sequence derived from at least one constant amplitude zero autocorrelation sequence. A next step includes combining the spread sequence with a Walsh code to form an extended spread sequence. A next step includes using the extended spread sequence in a preamble for a RACH. A next step includes sending the preamble to a BTS for acquisition. A next step includes monitoring for a positive acquisition indicator from the BTS. A next step includes scheduling the sending of a RACH message. A next step includes sending the RACH message.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.