LTE: What is maxCID ?

Question

I have basic understanding of RRC Re-establishment procedure at RRC level. But i am looking for actions performed by lower layer like PDCP, RLC etc wrt DATA Plane and signalling.

Answer 1

maxCID = Maximum Context Identifier.

This is the maximum CID value that can be used. One CID value shall always be reserved for uncompressed flows. The parameter MAX_CID is configured by upper layers.

It is a parameter used for the compression and decompression of the PDCP header.
maxCID is defined in Section 5.5.3

Context Identifier: Associated with each compressed flow is a context. The context is the state that the compressor and the decompressor maintain in order to correctly compress or decompress the headers of the packet in the flow. Each context is identified using a CID.
CID is defined in section 5.1.1