METHOD TO REDUCE COMPUTATION IN BTFD
Original Publication Date: 2003-Feb-03
Included in the Prior Art Database: 2003-Feb-03
Jeff Atwell: AUTHOR [+2]
AbstractThe retention of the information of a transport channel format (TF) over the Transmission Time Interval(TTI) period enables the elimination of a number of format detection attempts during blind transport format detection.
TO REDUCE COMPUTATION IN BTFD
By Jeff Atwell and Ben The
The retention of the information of a transport channel format (TF) over the Transmission Time Interval(TTI) period enables the elimination of a number of format detection attempts during blind transport format detection.
Blind Transport Format Detection (BTFD) is a very computationally intensive feature in 3GPP Wireless Specifications, requiring the determination of which Transport Format (TF) used for every distinct transport channel (TrCH) in the radio link (RL) every minimum transmission time interval (TTI). This requires decode attempts for all possible transport formats for all TrCHs at the conclusion of their respective transmission time intervals (TTI). This requires computation that increases with the number of transport channels and the number of different formats each transport channel may use.
Guided channel detection involves attempting to decode all possible transport formats for the guiding TrCH. The decode attempt with the best quality metrics/CRC result determine the formats of all other multiplexed TrCHs in the radio link. Then any other TrCHs due to be decoded must be decoded with the determined transport formats. This type of radio link will be used to demonstrate a technique to reduce the increase in computation. This technique would apply also to BTFD for a radio link without a guiding TrCH.
For radio links with a guiding TrCH and any TrCHs with lo...