Hi,
Please help me understand the following uncertainties regarding 4 bit link
estimation (4bitle):
1) 4bitle is using both data-driven and beacon approach to estimate link
qualities in terms of ETX. Data-driven is estimating bidirectional link
quality since it leverages ACK, whilst beacon is only measuring inbound
link quality. Is it problematic to combine these two estimated ETX into a
single ETX? What does this single ETX mean? Inbound link quality, or
bidirectional?
2) In beacon based link estimation of 4bitle, each packet from upper layer
is slapped with a header containing sequence number information needed to
compute link quality prior to transmission. However, the sequence number
has only 8 bits (see below). Is this sufficient for beacons more than 255?
typedef nx_struct linkest_header {
nx_uint8_t flags;
nx_uint8_t seq;
} linkest_header_t;
Thanks for your attention.
-Xiaohui Liu
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