Question: In a 5G NR (New Radio) network utilizing User Plane Data Compression (UDC) with Pre-defined Dictionaries, what happens to the content of a pre-defined dictionary in the compression buffer after the size of transmitted uncompressed packets compressed by UDC exceeds the buffer's capacity?
Option 1: The dictionary is updated with new entries from the upper layers.
Option 2: The entire dictionary is retained at the head of the compression buffer.
Option 3: The dictionary's content is partially duplicated in the buffer to enhance compression.
Option 4: The content of the dictionary is totally pushed out of the compression buffer.
Explanation: According to UDC principles, the compression buffer operates on a First-In-First-Out (FIFO) basis. Once the cumulative size of uncompressed packets surpasses the allocated buffer size, the earliest added content—the dictionary in this context—must be entirely ejected to accommodate new data, ensuring the buffer remains operational within its defined capacity limits, prioritizing newer data for compression efficiency.