What is PDCP Protocol layer in LTE?

The packet data convergence protocol (PDCP) sublayer is part of LTE layer 2 protocols, which is responsible for the IP header compression of user-plane data packets in order to reduce the number of information bits transmitted over the air-interface and to improve transmission efficiency.

What is PDCP in 3GPP?

Packet Data Convergence Protocol (PDCP) is specified by 3GPP in TS 25.323 for UMTS, TS 36.323 for LTE and TS 38.323 for 5G. PDCP is located in the Radio Protocol Stack in the UMTS/LTE/5G air interface on top of the RLC layer.

What is PDP request?

A Packet Data Protocol (PDP) context offers a packet data connection over which the UE and the network can exchange IP packets. Usage of these packet data connections is restricted to specific services. These services can be accessed via so-called access points.

What is PDCP in 4g?

PDCP fundamentally provides a compression service to higher layer data, which may be control plane or user plane (IP) traffic.

What is RRC and PDCP?

PDCP stands for Packet Data Convergence Protocol. It is a layer of 5G NR radio protocol stack. It is placed top of the RLC Layer and below of the SDAP layer(for user plane) or RRC layer (for control plane) in the Radio Protocol Stack in 5G NR. Due to header compression functionality, it is called as convergence …

What is the difference between PDU and SDU?

Protocol data units (PDUs) — packets exchanged between peer entities in the same layer. Service data units (SDUs) — packets handed to a lower layer by an upper layer. A PDU is typically a SDU with an additional header or trailer that carries information needed by that layer’s protocol.

How is packet data protocol PDP Addressd on mobile station?

Each PDP address is anchored at a Gateway GPRS Support Node (GGSN), as shown in figure below. All packet data traffic sent from the public packet data network for the PDP address goes through the gateway (GGSN). The public packet data network is only concerned that the address belongs to a specific GGSN.

What is PDP type?

Packet Data Protocol Type A Packet Data Protocol Type (PDP Type) identifies the used/allowed protocols within the PDP context. Examples are IPv4, IPv6, and IPv4v6 (dual-stack).

What is the role of PDCP?

From UMTS, the main function of the PDCP layer has been the header compression of IP packets – this is the reason why it is called the Packet Data Convergence Protocol. In LTE, the PDCP layer has evolved to support a security function; that is, integrity protection and ciphering.

What is the function of RRC?

The RRC layer performs the following functions such as broadcast of system information, paging, establishment/release of an RRC connection, transfer of NAS information, AS security configuration, transfer of UE radio access capability, measurement configuration and reporting and mobility control.