Byte sequencing protocol for an asynchronous data transmission system
US5905756A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 17, 1996 |
| Grant date | May 18, 1999 |
| Priority date | — |
| Expiry date | Dec 17, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L1/16
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A communication system that communicates between a base station and a mobile station over a wireless rf channel. The communication system uses a novel protocol for transmitting a data frame in which an 8-bit data byte is divided into two 4-bit data nibbles. Each data nibble is assigned a 4-bit sequence number to form a transmission byte. By determining the sequence number of any transmission byte or series of transmission bytes, the beginning and the end of a data frame can be determined. A CRC check indicates when a data frame has been received successfully. The protocol does not require the use of unique start-of-frame (SOF) and end of-frame (EOF) characters. Also, the system implements a majority vote algorithm that collects data from successively transmitted copies of a given data frame and performs a majority vote to determine a mostly likely received data pattern. The protocol allows the system to achieve an improvement analogous to a 1.5 to 2.5 dB increase in signal power over other transmission protocols that require the use of SOF and EOF characters to transmit a data frame.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.