Method and apparatus for checking communicated data
View Patent ↗An apparatus ( 18 ) and method ( 100 ) provide RLP data checking. The apparatus ( 10 ) includes a frame serialization stage ( 20 ) and a bad frame filter ( 22 ) that detects possible bad frames and reclassifies these bad frames as erasures. In this manner, bad frame data are not passed to the RLP layer ( 16 ), and unnecessary resetting and resynchronization steps are avoided.
1. A method of providing RLP data checking comprising:
receiving a plurality of RLP data frames, wherein the plurality of RLP data frames can be transmitted across a plurality of channels;
identifying from the RLP data frames a suspected bad frame by retrieving a data frame sequence identifier from a received valid data frame and comparing the data frame sequence identifier with a data frame sequence parameter;
wherein the data frame sequence parameter is a function, at least in part, of a number of channels that the plurality of RLP data frames can be transmitted across
reclassifying the suspected bad frame to form a reclassified frame, wherein the reclassified frame is an erasure: and
passing the reclassified frame to a RLP data detector.
2. The method of claim 1 whereby at least one of the channels is a Discontinuous Transmission (DTX) channel.
3. The method of claim 1 wherein occurrence of the step of reclassifying the suspected bad frame is dependent on whether a channel is determined to be currently in active use.
4. The method of claim 1 wherein occurrence of the step of reclassifying the suspected bad frame is dependent on an elapsed time from receiving a previous data frame sequence identifier.
5. A method of providing RLP data checking comprising:
receiving a plurality of RLP data frames, wherein the plurality of RLP data frames can be transmitted across a plurality of channels;
identifying from the RLP data frames a suspected bad frame by retrieving a data frame sequence identifier from a received valid data frame and comparing the data frame sequence identifier with a data frame sequence Parameter;
wherein the data frame sequence parameter is a function, at least in part, of a number of channels determined to be in active use:
reclassifying the suspected bad frame to form a reclassified frame, wherein the reclassified frame is an erasure; and
passing the reclassified frame to a RLP data detector.
6. The method of claim 5 whereby a channel is determined to be in active use by:
maintaining a consecutive erasure count for each of the channels; and
comparing at least one of the consecutive erasure counts with at least one threshold.