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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US8804742B2 – PDCP packet transmission method – Google Patents

Because the step of FIG. The only key question when you try to decode real PDCP data would be “Which diagram I have to use to decode this data? The WTRU entity of claim 6wherein the predetermined number is Internet Protocol Version 4, Src: The article is a good help in understanding PDCP. Accordingly, LastSucceededSN is set to The mobile terminal or network entity may include the protocols of FIGS. Last packet is expected to be indicated explicitly. Control packets are used by ROHC to provide feedback to the compressors from decompressors.

One subframe includes a plurality of resource blocks, each of which includes a plurality of symbols and a plurality of subcarriers. One eNB 20 may be deployed per cell.

For RBs for which the Discard Timer is to set to ms50, ms, ms, ms, ms, ms, and ms, rather than to infinity, upon receipt of data from upper layers, the PDCP layer starts the Discard Timer of the corresponding data. The tm lte a offers the earliest access to the latest 3gpp functionality, before real handsets, as well as layered operation and a high degree of logging and control.


Max Size in Byte. In this case, data loss occurs at the application end. If any terms herein have been erroneously used or not completely technically accurate, then such terms may be clarified or interpreted as those skilled in the art would deem appropriate.

Method and apparatus for handling out-of-order packets during handover in a wireless communication system. Multiple packets can be given at one pdc.

PDCP layer is expected to do following: Newer Post Older Post Home. The RLC layer of the second layer L2 supports reliable data transmission.

PDCP specification spe that Section 5.

In one embodiment, the predetermined number is based on the size of a reordering window. Normally it is active.

Packets received by a layer are called service data unit sdu while the packet output of a layer is referred to by protocol data unit pdu. First of all, the user data transmission and reception process according to the conventional art will be described below.

Namely, the function of the header compressor is applied only for the U-plane data, and the integrity protection function among the functions of the security handling unit is applied only for the C-plane data. Note that in LTE, both voice and data use packet switching. Interface to send control messages via SRBs: Reason for this is lets take an example – if suppose channel condition is bad and eNB is not able to give enough grant to UE in uplink in that PDCP may discard the packets and if it discard the packets due to this will it send Out of ORDER or in order packets.

You will refer to this table a lot when you try to decode PDCP data yourself. Below is a logical digram of eutran protocol layers with a depiction of data flow through various layers.


USB2 – PDCP packet transmission method – Google Patents

RLC might be buffering the packets if they come in out-of-order. Hereafter, with reference to the attached drawings, some embodiments will be explained, and regardless of the reference numbers in the drawings, some elements may be labeled with the same reference numbers and any repetitive explanations may have been omitted merely for the sake of brevity. This bsdlicensed program gives xpec example of how you might send pdcplte frames in this format.

DRBs are used for sending voice and data. It is a successor of 2G and 3G families of standards. Please click button to get lte and the evolution to 4g wireless ltr now.

Effective reception method in wireless communication system providing MBMS service.

The header compression function allows efficient transmission of Internet protocol IP packet, such as an IPv4 or IPv6 packet through a radio interface that has a relatively narrow bandwidth. It gives an impression that packets are stored in the PDCP layer for inorder delivery to the upper layers. Posted by Srini at Following is the data structure for SRB. 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.

I always wondered how and when PDCP generates the status reports.