Cable carrying communications data and timing data to radio heads
US6950414B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 17, 2000 |
| Grant date | Sep 27, 2005 |
| Priority date | — |
| Expiry date | Oct 9, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L7/0008
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for providing timing information to radio heads in a wireless communications system. One or more radio heads are connected to a central unit by a respective cable. This cable includes at least two sets of conductors. The first set carries communication data between the central unit and the radio head. This communication data may be user data, such as voice, data, or fax data, and optionally control data. This communication data is transferred between the radio head and the central unit using an asynchronous transmit method. Due to its variable timing of successful receipt, it may be difficult to send highly accurate timing data via asynchronous transmit methods. Instead, a synchronous transmit method may be advantageously employed to send timing data in the present invention. The timing data is sent on the second set of conductors of the same cable using a synchronous transmit method. Thus, each cable of the present invention carries both asynchronous transmissions and synchronous transmissions. The cable may advantageously be a portion of an existing LAN cable plant, and the asynchronous transmit method may be according to an Ethernet protocol. One or more r…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.