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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Packet Data Convergence Protocol .pdf
The present invention relates to mobile communication, and more particularly, to a PDCP packet transmission method. In this case, data loss occurs at the application end. The method of spfc present invention may be implemented in a mobile terminal or network entity.
Method and apparatus for transmitting and receiving data using a plurality of carriers in mobile communication system. If ciphering is properly performed, no data loss occurs.
Lte pdcp spec pdf files
These packets are sent to the PDCP layer with the sequence number. Such transmitting side and receiving side share a PDCP control unit Method and apparatus for performing handover using packet data convergence protocol pdcp reordering in mobile communication system.
First of all, the user data transmission and reception process according to the conventional art will be described below. Some opaque information to pass along with indications to the control plane. There is one PDCP context for radio bearer.
If PDCP layer receives duplicate packets packets with same sequence numberthe it discards them and does not send them to upper layers. Accordingly, data loss occurs. In one embodiment, the receiving step, the determining step, and the assigning step are implemented by a PDCP entity.
PDCP is user plane protocol. 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.
RLC might be buffering the packets if they come in out-of-order. It is present in UE and eNodeB. This paper provides an indepth view on the technologies being considered for long term evolutionadvanced lte advanced.
Random technical bits and thoughts: LTE PDCP from eNodeB perspective
The features described herein can be applied to the so-called LTE Long Term Evolution technologies, which are being developed after 3G mobile communications in anticipation of rapidly increasing data traffic. One subframe includes a plurality of resource blocks, each of which includes a plurality of symbols and a plurality of subcarriers. Using this interface point, PDCP informs the content of status transfer ldcp to the control plane.
That is, there could be some missing packets at that time.
According to the present invention, when the Discard Timer is pdcl set to infinity, if no radio link failure occurs, and the low signal environment continues, it is possible to prevent the discarding of or more PDCP SDUs with sequence numbers already assigned thereto by limiting the maximum number of transmission data. Therefore, an object of the present invention is to improve the transmission performance of UE and eNB by suggesting a method for preventing data loss at the application end, caused by an invalid deciphering result which is generated when or more PDCP SDUs with sequence numbers assigned thereto are discarded.
Describing this process with illustration would be as follows. Method and apparatus for supporting configuration and control of the rlc and pdcp sub-layers. That is there is no segmentation and concatenation functions in PDCP layer.
For example, the method of the present invention can be implemented as codes or lt of a software program that can be executed by a processor, and can be saved in a storage medium e. In the case of using an ciphering algorithm lts 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.
Data is also transferred via a physical channel between a physical layer of a transmission side and a physical layer of a reception side. Control packets are used by ROHC to provide feedback to the compressors from decompressors. What is time based discarding at pdcp layer and why it is used.
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US8804742B2 – PDCP packet transmission method – Google Patents
To achieve these and other advantages and in 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 are assigned to less than the predetermined number of PDCP SDUs, assigning a sequence number to the PDCP SDU received from the upper layer.
What are we supposed to do? Type 1 uses frequency division duplexing uplink and downlink separated by frequency, and tdd uses time division duplexing uplink and downlink separated in time. In one embodiment, the method further includes: The method for transmitting PDCP packet, includes the steps of: Create and modify scenario files for download into the pxt.
The physical layer is connected to a Medium Access Control MAC layer located at an upper level through a transport channel. From very basic PDCP configuration based on Release 8 and pretty complicated configurations based on Release 13you would notice how PDCP has evolved from old specification to more recent specification.