Impacts to HC in case of Radio Link Congestion If HC is located in the central node (AG): –Require flow control mechanisms between BS and AG –The BS have to drop the compressed packets –Will impact on HC state (HC state between compressor and decompressor will be out of sync more often) –Will drop more packets due to waiting for feedback from the decompressor (1 round trip delay) –HC state resync procedures take longer –At HC resync, the already buffered data at BS is still sent over the air and it is totally wasted Require mechanisms to delete buffered packets at the BS buffer by AG –Need in sequence delivering between the AG and BS ROHC out of order delivery capability is limited.
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