9. PDCP layer
The PDCP (Packet Data Convergence Protocol) layer is used for both user data transfer and signaling transmission . It incorporates the ROHC (RObust Header Compression) mechanism, which enables header compression and decompression. Indeed, applications such as voice over IP involve a large protocol stack: a voice block, typically 30 bytes, is placed in an RTP (Real Time Protocol) block adding a header of typically 12 bytes; the RTP block is transported in a UDP segment with an...
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PDCP layer
Example of multi-service transmission
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