LTE;. Evolved Universal Terrestrial Radio Access (E-UTRA);. Packet Data Convergence Protocol (PDCP) specification. (3GPP TS version Release. PDCP is an abbreviation for Packet Data Convergence Protocol. This protocol is specified by 3GPP in TS for UMTS, TS for LTE and TS for 5G New Radio [NR). The PDCP is located in the Radio Protocol Stack in the UMTS/LTE/5G Air 3GPP TS Packet Data Convergence Protocol (PDCP ) specification. Packet Data Convergence Protocol (PDCP) specification. (Release 8). The present document has been developed within the 3rd Generation Partnership Project.

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Some points to note: In one embodiment, the method further includes if sequence numbers are assigned to the predetermined spe of or more PDCP SDUs, returning to the determining step. A method for transmitting PDCP packet, the method comprising: System and method for reducing resets during handovers in a single frequency dual carrier wireless communication system. Accordingly, an HFN mismatch occurs, and this results in an invalid deciphering result, thus causing data loss at the application end and making lost data permanently unrestorable.

So I will leave this to the readers to interpret the diagram. Openssl on qoriq communications platform and c29x psec. And the other difference is that you do not have the MAC-I at the end of the data. But putting all together the following diagram from 3GPP UM typically takes very few core cycles.

PDCP upon receiving the packets from RLC layer is expected to send the status report to the peer with bitmap of packet sequence numbers so that the peer PDCP can remove the SDUs at its transmit side that were acknowledged in the status message.

Lte pdcp spec pdf files

LTE Long Pxcp Evolution is one of the 4th generation wireless standards designed to increase the capacity and speed of mobile telephone networks. Wireless communication method for transmitting a sequence of data units between a wireless device and a network.

Security function over the air interface: PDCP specification goes in great lengths on PDCP data transfer procedures and details out internal implementation such as state variables to be maintained for received and transmit operations. There is one PDCP context for radio bearer. I can correct your second wonder! THis function is normally spfc in target eNB during handover execution phase. Download lte and the evolution to 4g wireless or read online here in pdf or epub.


Random technical bits and thoughts: LTE PDCP from eNodeB perspective

Towards a 5g mobile system architecture standardization. User Datagram Protocol, Src Port: In addition, one subframe includes a plurality of symbols e. Data is also transferred via a physical channel between a physical layer of a transmission side and a physical layer of a reception side. Method and apparatus for supporting configuration and control of the rlc and pdcp sub-layers.

The process described here apply only to C-Plane data.

In the case of using an ciphering algorithm other than Null, if or more PDCP SDUs with sequence numbers SNs assigned thereto are discarded, the HFN value used by the transmitting side and the HFN value used by the receiving side are different from each other, which is an invalid deciphering result, and therefore data loss may occur at the application end.

My understanding is that by default it is set between 1sec to 5 seconds. I also had some confusion on Pte discard for some time.

This bsdlicensed program gives an example of how you might send pdcplte frames in ltr format. Pdcp sn is maintained on a bearer basis and the source enb informs the target enb about the next dl pdcp sn to allocate to a packet which does not have a pdcp sequence number yet either from source enb or from the serving gateway. Such transmitting side and receiving side share a PDCP control unit Once it add ‘Sequence Number’, it has to manage the number.

ROHC is expected to reduce the over head to few bytes. Pdcp sae bearer control ciphering and integrity protection spfc nas signaling. This allows packets to be discarded pddcp PDCP layer did not successfully send the packets for ‘discard timeout’ time.

But it says “this applies only to U-plane data”.

Packet Data Convergence Protocol (PDCP)

LTE Long Term Evolution is one of the 4th generation wireless standards designed to increase the capacity and speed of mobile telephone networks.


To achieve these and other advantages and sprc accordance with the purpose of the present invention, as embodied and broadly described herein, there is provided a method for transmitting a PDCP packet according to an embodiment of the present invention, the method including receiving a PDCP SDU from an upper layer; determining whether or not sequence numbers are assigned to less than a predetermined number of PDCP SDUs subsequent to the last PDCP PDU completely and successfully transmitted from a lower layer; and if sequence numbers prcp assigned to less than the predetermined number of PDCP SDUs, assigning a sequence number to the PDCP SDU received from the upper layer.

PDCP layer assumes that the packets are given in order by the RLC and hence don’t need to store the packets to do inorder delivery to the upper layers. In pdcp or full protocol mode, a tcpip connection can be established allowing standard ip network test tools to be used, e. PDCP is user plane protocol. I thought remote peer waits on the packet sequence number endlessly. Fourth-generation mobile communication is the fourth generation of wireless mobile communications standards.

Lte enb pdcp rlc rlc nr rlc mac pdcp gnb nr pdcp nr rlc nr mac s1 s1 mcg bearer split bearer scg bearer xx mcg master cell group scg secondary cell group. An interface for transmitting user traffic or control traffic may be used ltee the eNBs System and method for multi-point hsdpa communication utilizing a multi-link pdcp sublayer. Lteuu lteuu eir gsmscf gsmsrf gmlc lcs client sgsn mmsc ggsn osa app server osascs slf sip server sig gw.

PDCP specification says that Section 5. Ciphering and Deciphering of user plane and control plane data. Of course, all of the these functionality is listed in the 3GPP specification, but it would not become yours unless you combine these diagrams and the written descriptions in your own words.

That is quite a bit of overhead. Then you may ask ‘how we can configure PDCP operation?