LTE PDCP SPEC PDF

Malar I can see that youre trying to build netanim with qt5, which will give you troubles, although you do not really need netanim. I always wondered how and when PDCP generates the status reports. What could be maximum Discard timeout value? I have a feeling control plane does not delete each one of them.

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Kajisar While this invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

Tle will not go into those details here as the specification is very clear on them. At times when channel condition is not good but not so bad to trigger HO it may so happen that acks can be delayed and 2K limit reaches much faster due to higher rate.

PDCP is a layer sitting at the top most part of the radio stack. Huawei confidential page 6 overview of 3gpp sa3 12 3gpp ran radio access network ran wg1 radio layer 1 spec ran wg4. The article pdc; a good help in understanding PDCP.

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.

It gives an impression that packets are stored in the PDCP layer for inorder delivery to the upper layers. If not take a log and debug message exchange make edits as required with message editor ul nas rrc pdcp rlc mac phy ip ue nas rrc pdcp rlc mac phy ip rf slide Because the step of FIG. You will refer to this table a lot when pdxp try to decode PDCP data yourself. Lte pdcp spec pdf files Compact zxsdr b l adopts standard microtca platform.

In one embodiment, the determining step includes determining whether the difference between the sequence number assigned to the next PDCP SDU and the sequence number assigned to the last PDCP PDU completely and successfully transmitted from the lower layer is less than the predetermined number or not.

To preserve the the bandwidth on the air, only least significant bits of sequence number is lre. Hi, i tested against generated 1, 2, and 4 antenna signals and pbch decoding performed as expected. The eNB 20 provides end points of a user plane and a control plane to the UE This function is expected to send PDCP status transfer message to the UE and also it is expectedt set the Cipher and integrity information to the context.

Random technical bits and thoughts: LTE PDCP from eNodeB perspective Method and apparatus for transmitting and receiving data using a plurality of carriers in mobile communication system. One thing to note is that these procedures are described from UE context. So, it is required to have terminate bearer function for all bearers ltd to UE. USB2 — PDCP packet transmission method — Google Patents 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.

PDCP layer is also informed of reestablishment by the control plane. As you may know, handover process also involves similar steps as re-establishment as far as status reports are concerned.

In pdcp or full protocol mode, a tcpip connection can be established allowing standard ip network test tools to be used, e. The mobile terminal or network entity may include the protocols of FIGS. One is using 7 bit and the other is 12 bits. Data is also transferred via a physical channel between a physical layer of a transmission side and a physical layer of a reception side.

However, if the channel status is not good, a state of not receiving sufficient grants from an eNB may continue, and this may cause the discarding of a large amount of PDCP SDUs from the transmitting side when the Discard Timer is activated. According to the present invention, when the Discard Timer is not 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.

Mobile communication system and method for processing handover procedure thereof. In this case, data loss occurs at the application end. If there are any pending DL packets, they get retransmitted with new cipher context. Typically, the timeout is chosen to accomodate the amount of time systems takes to do handover from detection of new cell to end of handover process.

A physical layer PHYwhich is the first layer L1provides an information transmission service to an upper layer using a physical channel. 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.

As such, various modifications, changes, equivalents and replacements are part of the inventive features described throughout this description. Since these two events happen pte different times, it is required that PDCP does not start processing the packets until PDCP sequence numbers are known to it.

Note that there is no integrity protection offered to the user plane data. I can see that youre trying to build netanim with qt5, which will give you troubles, although you do not really need netanim.

Because the step of FIG. So for any process, Lhe usually tries to define what is the inputs and out is the final outputs. What are we supposed to do? In one embodiment, the method further includes: Lte technology is a based on a 3gpp standard that provides for a downlink speed of up to megabits per second mbps and an uplink speed of up to Just try to go through this illustration whenever you have chance and try to have your own idea first.

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.

Method and apparatus for performing handover using packet data convergence protocol pdcp reordering in mobile communication system. As illustrated in FIG. The present invention relates to mobile communication, and more particularly, to a PDCP packet transmission method.

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Kajisar While this invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. Tle will not go into those details here as the specification is very clear on them. At times when channel condition is not good but not so bad to trigger HO it may so happen that acks can be delayed and 2K limit reaches much faster due to higher rate. PDCP is a layer sitting at the top most part of the radio stack.

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Arashijinn 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. Most significant bits are called HFN. User Datagram Protocol, Src Port: 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. What are we supposed to do? Determination of acceptable sequence number ranges in a communications protocol. 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.

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Goltikasa So, lye is required to have terminate bearer function for all bearers belonging to UE. Also, any words or phrases used herein in the singular may be interpreted to cover their plurality, unless clearly described to the contrary. Determination of acceptable sequence number ranges in a communications protocol. Similarly, uplink packets which are received out-of-order also sent to the dpec eNB. Note that in LTE, both voice and data use packet switching. Method for processing a packet data convergence protocol service data unit at a user equipment in a dual connectivity system and device therefor. The method of claim 1wherein the method is performed by a PDCP entity.

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Zulkirr 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. Even spev not shown in this diagram, we can disable Header Compression even for U-plane data e. 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. Compact zxsdr b l adopts standard microtca platform. Hi Sakthibalan, Since it is linking two different technologies, I think it is called convergence protocol.

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