SNDCP
SNDCP, Sub Network Dependent Convergence Protocol, is part of
Logical Link Control
(LLC) protocol at the bottom.
In the spirit of the GPRS specifications, there can be many implementations of SNDCP, supporting protocols such as
GPRS
only support IP as the payload type.
The SNDCP layer is relevant to the protocol stack of the mobile station and that of the
PDP Context is established and the quality of service
has been negotiated.
Services offered by SNDCP
The SNDCP layer primarily converts, encapsulates and segments external network formats (like
PDP Context
are transmitted to the LLC layer in sufficient time to maintain the QoS. SNDCP provides services to the higher layers which may include connectionless and connection-oriented mode, compression, multiplexing and segmentation.
References
- 3GPP TS 44.065 "Mobile Station (MS) - Serving GPRS Support Node (SGSN); Subnetwork Dependent Convergence Protocol (SNDCP)"