What is PDCP in LTE?
From Wikipedia, the free encyclopedia. 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 PDCP in 5G?
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 PDCP in networking?
PDCP is an abbreviation for Packet Data Convergence Protocol.
What is RLC and PDCP?
PDCP is the lowest throughput. Then RLC throughput is higher than PDCP throughput not only due to headers but also due to RLC retransmissions. Then MAC throughput is higher than RLC throughput due to harq retransmissions and headers. Then PHY throughput is higher due to headers.
What is the function of Packet Data Convergence Protocol PDCP )?
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 reordering?
PDCP waits till T-reorder timer for in-sequence delivery of packets to upper layer . These retransmissions and reordering features at RLC and PDCP are controlled with the use of different parameters, like T- reordering timer , maximum window size, T-reassembly timer , max retransmission count etc.
Is PDCP a Layer 2?
The layer 2 of NR is split into the following sub layers: Service Data Adaptation Protocol (SDAP) Packet Data Convergence Protocol (PDCP) Radio Link Control (RLC)
What is PDCP aggregation?
The basic principle of split bearer in DC is that one PDCP with two RLC entities. One RLC entity for each of LTE & NR and the RLC SDUs from both of these RLC entities will aggregate at PDCP layer. This is called PDCP aggregation.
What is PDCP sequence number?
The value of the PDCP sequence number ranges from 0 to 65535. The PDCP SN window size indicates the maximum number of PDCP SDUS, not confirmed to have been successfully transmitted to the peer entity by lower layer, that can be numbered at any given time. The PDCP SN window size is configured by upper layers.
What is PDCP duplication?
Indicates whether or not uplink duplication status at the time of receiving this IE is configured and activated as specified in TS 38.323 . The presence of this field indicates that duplication is configured. PDCP duplication is not configured for CA packet duplication of LTE RLC bearer.
What is PDCP DL throughput?
DL: Throughput of PDCP SDU bits in downlink for packet sizes or data bursts that are large enough to require transmissions to be split across several TTIs, by excluding transmission of the last piece of data in a data burst. If sum(ThpTimeDl>0) à sum(ThpVolDl)/sum(ThpTimeDl)x1000 (kbits/s).
What is PDCP SDU?
A PDCP SDU is a bit string and is aligned by bytes, that is, a multiple of 8 bits, in length. From the first bit of the PDCP Data PDU, a compressed or uncompressed SDU is included. The below figure represents PDCP Data PDU format with 12 bits PDCP SN. This format fits for SRBs.