Local and wide-area transmissions in a wireless broadcast network
US7660275B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 18, 2004 |
| Grant date | Feb 9, 2010 |
| Priority date | — |
| Expiry date | Dec 29, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L5/0048
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
To broadcast different types of transmission having different tiers of coverage in a wireless broadcast network, each base station processes data for a wide-area transmission in accordance with a first mode (or coding and modulation scheme) to generate data symbols for the wide-area transmission and processes data for a local transmission in accordance with a second mode to generate data symbols for the local transmission. The first and second modes are selected based on the desired coverage for wide-area and local transmissions, respectively. The base station also generates pilots and overhead information for local and wide-area transmissions. The data, pilots, and overhead information for local and wide-area transmissions are multiplexed onto their transmission spans, which may be different sets of frequency subbands, different time segments, or different groups of subbands in different time segments. More than two different types of transmission may also be multiplexed and broadcast.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.