8. Changing context identifiers

On a point-to-point link, the compressor has total knowledge of what CIDs are in use at the decompressor and may change what CID a packet stream uses or reuse CIDs at will.

Each non-TCP CID is associated with a context with a generation value. To avoid too rapid generation wrap-around and potential incorrect decompression, an implementation MUST avoid wrap-around of the generation value in less than MIN_WRAP seconds (see section 14).

To aid in avoiding wrap-around, the generation value associated with a CID MUST NOT be reset when changing to a new packet stream. Instead, a compressor MUST increment the generation value by one when using the CID for a new non-TCP packet stream.