kpi optimization lte call drop ratewhat are the dates for expo west 2022

Additionally if a UE misbehaviour is due to a SW error and is a source for some kind hacked/attack, is it possible to handle these in the RAN itself- during registration phase? So, this reduces the RRC Success Rate of RRC Mo-Signalling compared to other RRC Request types. Would you like let me know from part vendor Ericsson, Nokia or Huawei? N310 indicates an interval of 200 PDCCH decoding failures. Usually unspecified reason is due to radio issue generally uplink timeouts or N310. (2019). Thanks Luqman. Such a UE will initiate a RRC ReEstablishment procedure to regain its radio link. 2, 411415 (2010), Lin, Y.-B., Mohan, S., Noerpel, A.: Queuing priority channel assignment strategies for pcs handoff and initial access. Provided by the Springer Nature SharedIt content-sharing initiative, Over 10 million scientific documents at your fingertips, Not logged in Identify Non-RAN Issues How to find Backhaul or Core Network Issues. I have a cell whose E-RAB SSR is fine but S1 SSR is impacted severely. Consider a scenario, where UE tries to perform a handover and fails. This video will help you to understand the DCR (Drop Call Optimization) in LTE/VoLTE Network. As far as my understanding goes it is 200 ms. Now lets understand why this happens. If this timer is too small, the UE will stop waiting for the RRC Connection Setup message and the RRC procedure will fail. This timer is usually a large value, so such a drop is rare. So, if the message size is big for uplink, then its power will be distributed on more PRBs reducing the overall power per PRB and the decoding probability at eNB. -> Source cell prepares UE and releases the radio link STARLINK vs 5G Who Will Win The Ultimate Race? 16, 858874 (1998), Lobinger, A., Stefanski, S., Jansen, T.: Coordinating handover parameter optimization and load balancing in LTE self-optimizing networks. However, if the eNB2 is not a neighbor then it will reject the RRC ReEstablishment. Glad to know that it helped. Nice Explanation But for the former the power per carrier will be less as it required more PRB. So, if it gets a UE Context Release Command from the MME, the eNB will consider this abnormal and it will peg it under MME drop. Now, the UE will initiate a new RRC Connection at the eNB2 and based on that the eNB2 will forward S1 Initial UE Message to the MME. LTE KPI Optimization (Session 3): LTE ERAB Drop RateThis video is the third session in LTE KPI Optimization series and explains the LTE ERAB Drop Rate KPI. Dear Ali.. If a network has a maximum of 16 RLC retransmissions for downlink, nice one, its really helpful. Thank you for your comment. In this, eNB1 and based on that it will accept the RRC ReEsta, a neighbor then it will reject the RRC ReEstablishment. Every network is striving to improve this KPI and it has become more important in LTE since the introduction of VoLTE. From the UEs perspective this will be considered a call drop but at the eNB1, the eNB still does not know that this UE has experienced RLF. One of the most important KPI is the LTE Call Drop Rate. Thanks, Your email address will not be published. IEEE Commun. - 82.165.198.169. IEEE J. Sel. ive a doubt.. As explained above eNB is expecting U Context Release from Target eNB over X2, if it comes from MME then itll consider as MME Drop, which is obvious. The first timer is maintained on the UE and it is the famous T300. No, when a UE tries to access the LTE network, it has to add an identity in the RRC Request. Since, it is only around 7 bytes, it will need a small number of RBs so power per carrier will be high. J. Inf. Lets, understand with help of different cases that. Futuristic Trends in Network and Communication Technologies, https://doi.org/10.1007/978-981-13-3804-5_28, Communications in Computer and Information Science, http://www.trai.gov.in/web-123/Call-Drop/Call_Drop.pdf, http://www.3gpp.org/technologies/keywords-acronyms/105-son, https://www.cisco.com/c/en/us/solutions/collateral/service-provider/son-architecture/white-paper-c11-733194.pdf, http://cwi.unik.no/images/c/c3/SON_white_paper_NSN.pdf, http://www.3gpp.org/ftp/Specs/html-info/36300.htm, http://www.zdnet.de/88235891/nokia-kauft-eden-rock-fuer-self-organizing-networks/, https://www.vanillaplus.com/2016/11/28/23993-son-revenue-expected-to-grow-to-more-than-5bn-by-end-of-2020-says-sns/, http://www.mindmygadget.com/the-big-difference-in-cell-phone-technology-cdma-vs-gsm/, Tax calculation will be finalised during checkout. I will respond accordingly and also intend to write more about KPI Optimization soon. To calculate average cell availability for plots, compute and display cell availability on the charts/plots (if possible) or the reported Cell unavailability time. Once, the UE gets the RRC Connection Setup, it makes the changes based on the instructions in the message and then responds with RRC Connection Setup Complete message. I have one question in mind Why HFN is used in SN transfer during handover why cannot we use SFN. Identify Non-RAN Issues How to find Backhaul or Core Network Issues. I will be sharing more in coming days . Thank you so much!!! Hope you are doing well Most common cause, if X2 link is not there or if X2 link is having an alarm. The difference between the DL and UL RLC Retransmissions is that in case of DL retransmissions, the eNB knows that the UE has lost the radio connection, so it can release the resources and peg a radio induced call drop. How can we find the incompatible UEs that are impacting the KPIs because they fail in the RRC accesses? Course Hero is not sponsored or endorsed by any college or university. If either T311 or T301 expires, the UE goes to idle mode and no more RRC Connection Re-establishments sent. For example, users sending CQI with an interval of 10ms will be shifted towards 40ms in order to increase the capacity of the PUCCH. Thanks Khalid Bhai. Aside doing EURTWP query and Interference detecting monitoring to check if values above neg 114 (-114 dBm average nose power) on Huawei equipment please what again can I use to bring down this high percentage on my KPI? Moreover, such an issue is usually observed when the UE tries RRC ReEstablishment on a third eNB which was not the target. Therefore only T302 can optimize. The following procedures are usually used based on different scenarios, Conventional Method : Physical Optimization. This user will be trying RRC multiple times and failing each time and you can look at the identity to verify it. For instance, if the value of N310 is increased from 2 to 6 and T310 is increased from 500ms to 1000ms, then the UE will wait longer and there is more chance that N311 will be triggered. Youtube: LTE KPI Optimization (Session 3 . The details related to troubleshooting and optimizations for such issues is given below. As far as i know number Root Sequences Per Cell will increase with increase in Cell Radius. Thank you for sharing the best! The cell is part of at least one TA that is not part of the list of forbidden tracking areas for roaming which belongs to a PLMN that fulfils the first bullet above; Please follow the link below and post your question/feedback in Youtube comments section so that Ali Khalid will be able to answer. Easy to understand. The Call Drop Rate is ratio of total abnormal releases to the total normal releases . http://www.mindmygadget.com/the-big-difference-in-cell-phone-technology-cdma-vs-gsm/, Noida International University, G.B. 0-7803-7589-0/02/$17.00 2002 IEEE, Khara, S., Saha, S., Mukhopadhyay, A.K., Ghosh, C.K. Hi Raheel, I am striving to keep this forum vendor independent so I try not to discuss vendor specific parameters. Thanks for a great info but please if you could till more about xontext fetch over X2 not as a concept but if it names with another names as i searched for it at H but unfortinaitlly with no gain so please if more info or hints like switch named ? Call drop degrades the voice call quality and impacted the quality of service of the network. -> But UE does re-establishment back to source due to failed HO (before the HO timer expiry) The GPS availability is reported as A or calculated in percentage value as. Every network is striving toimprove this KPI and it has become more important in LTE since the introduction of VoLTE. when the ue experience a drop due to MME what is the common drop raison in signaling. eNBs internal timer is not set to a very small value. IFDA is Indias no 1 Computer Institute. 2023 Springer Nature Switzerland AG. Thanks for your comment, Arun. 5G Call Flows and Signaling How a 5G UE performs Initial Access, LTE Throughput Optimization: Part 2 Spectral Efficiency, Top Tools Every Developer should know to Develop a Mobile App, The Top 4 SEO Tips to Boost Your eCommerce Sales. I do remember it as 70 to 80% due to radio and the rest is because of core network related issues. You should look into the counters for HO failure due to MME, that should show you a more realistic picture. What change increasing the Cell Radius of target Cell actually brings that it starts decoding RACH properly ? That is called Single Radio Voice Call Continuity (SRVCC). Google Scholar, Li, X.J., Chong, P.H.J. This is the X2 Reloc Overall Timer and the cause of this release will be X2 Reloc Overall Expiry. However, if you have very high Mo-Signalling percentage then the chances are that RRC Success Rate will be relatively lower compared to another similar network with lower Mo-Signalling percentage. The post is really helpful. what is the negative impacts on LTE KPIs in case ANR adding redundant neighboring cells to NRT? The Call Drop Rate is ratio of total abnormal releases to the total releases. Just one query, you have mentioned N310 indicates an interval of 200 consecutive PDCCH decoding failures, but I feel it should be 20 consecutive PDCCH decoding failure as 20*10mS=200mS. Mobility Load Balancing is another feature that can help in such a scenario by moving users away from the congested carrier to another less utilized carrier. In: 73rd IEEE Vehicular Technology Conference (VTC Spring) (2011), The Big Difference in Cell Phone Technology: CDMA vs. GSM. One of the most important KPI is the LTE Call Drop Rate. @Ali khalid. Increasing, RLC retransmission threshold to a higher value might also help in reducing this, Consider a scenario, where UE tries to per, wait for a specific time as per T304 and once T304 expires, it will initiate a RRC, ReEstablishment with the cause value of Handover failure.

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