The cell in the higherpriority plmn delivers the value of this parameter to the ue for the srxlev evaluation. Lte carrier aggregation high speed packet access lte. This paper presents an autotuning scheme, based on a fuzzy logic controller flc, for a standardized intersystem cell reselection iscr algorithm in a multiradio access technology network. Generation 3g specifications was essentially a consolidation of the underlying gsm specifications and the development of the. Cell reselection lte gsm free ebook download as pdf file. Cell selection and reselection cell selection entity handles the cell selection reselection functionality, it is responsible for selecting the most suitable cell to camp on for the ue. Pdf user description, gsmumtslte cell reselection and. Cell selection and reselection in lte ue teletopix. Cell reselection procedures in lte lteencyclopedia. Squal q qualmeas qqualmin srxlev q rxlevmeas qrxlevmin pcompensation dimana.
Prioritybased cell reselection qualcomm incorporated. Lte radio link budgeting and rf planning lteencyclopedia. Ncell 4g lte 3g apn settings for android samsung galaxy s6 s7 j chines mobile redmi micromax htc sony xperia karbonn mobile tablet intex lg lava. Pdf lte for 4g mobile broadband air interface technologies and.
How to detect and reselect to another lte cell while in lte cell. The previous section described how initial cell selection will work and the difference between lte fdd and td lte. Avery reactive cell reselection mechanism can guarantee an adequate quality of the camping cell at the expenses of standby time, which is decreased by frequent reselections. Enhancement of the utra optimisation of the utran architecture to ensure the continued competitiveness of the 3gpp technologies for the future lte was the first and only technology recognized by the next generation mobile network alliance to meet its broad requirements target deployment in 2010. According to statistics2, the most common english surname is smith, which corresponds to physical layer cell identity group 0. Mobile cell selection in 4g long term evolutionadvanced. Intersystem cell reselection parameter optimization. These criteria for cell selection as well as cell reselection for lte are specified in 3.
Toprovide recommendations for intersystem cell reselection parameter settings, extensive channel measurements fromthe field havebeenprocessedwith our simulation platform. Lte is a trade mark of etsi currently being registered. This post will tell you about parameter setting related cell reselection from 2g to 4g lte in huawei network. Zubair mumtaz experienced network optimization engineer. However, only when specific criteria are fulfilled is the ue allowed to camp on that cell. One possible solution discussed was to enable reselection to an lte cell while the ue was in the cellfach state. All ues receiving mbms are able to receive the retransmissions and combine with. Ue is free to do cell reselection either the serving cell rf carrier strength is poor or suitable high strength neighbour cell is available in the same rat or different rat. In case of reselection from a lower priority cell to higher priority cell the below condition should hold good for atleast the t reselection timer. Lte network has priority 7 and the utran network has priority 3 from the utran network perspective.
Vplmn considers this offset parameter when it attempts to camp on a cell in a higherpriority plmn during periodic cell reselection. The cell selections are made on different parameters. How the multi carrier cell reselection happened in lte. Responsible for plan parameters for roll out and swap lte sites. Ue has completed the cell selection reselection process and has chosen a cell. Reference signal measurements rsrp,rssi,rsrq for cell reselection open script in the lte system, a ue must detect and monitor the presence of multiple cells and perform cell reselection to ensure that it is camped on the most suitable cell. Enhancing the performance of hsdpa communication with. Load balancing optimization in lteltea cellular networks. The handover and cell reselection procedures are the same as in emm case 6 handover without tau and case 7 cell reselection without tau, respectively, except that a tau procedure is required after handover cell reselection as this time ue moves to a nonregistered ta. Here are important parameter that need to be set regarding 2g to 4g cell reselection in huawei network.
It is shown that, given the same 5mhz bandwidth, both systems have similar cell ranges but, for a given target bit rate, there exists an optimum lte system bandwidth that maximizes cell range in both uplink and. Cell reselection lte gsm 3 gpp lte telecommunication scribd. More than 1 second has elapsed since the ue camped on the current serving cell. If the ue finds a better cell, ue reselects it and camps on it. Cell search and cell selection in umts lte application note. Traditionally in the lte technology evolution the possibility for aggregating multiple lte cells together has been called lte carrier aggregation rather than e. Mobile cell selection in 4g long term evolutionadvanced lte a networks murtadha ali nsaif shukur1, kuldip pahwa2, h. Cell reselection is a kind of mechanism to change cell after ue is camped on a cell and stay in idle mode. This situation arises when mobile station moves to new plmn area and hence it need to find suitable cell within the new plmn to camp on and secure access to the.
Intersystem cell reselection parameter optimization in. Plan the irat, csfb and cell selection reselection strategies and implementation. Ue is in idle mode and has completed the cell selection reselection process and has chosen a cell. As the name suggests, a link budget is simply the accounting of all of the gains and losses from the transmitter, through the medium free space, cable, waveguide, fiber, etc. What is gsm cell reselection and how it works, mobile will continuously make measurements on its neighboring cells, mobile, reselection, parameters.
Cell reselection procedure is the process by which uemobile finds the suitable cell to camp on. Interfrequency cell reselection according to cell reselection priority provided by sibs. See idle mode procedure section first for the big picture. Renesas mobile europe ltd et al, reselection from utran. The reselection criterion is based on parameters provided by the network. Development of the hspa standard as well as the lte standard is led. The contents of the present document are subject to continuing work within the. In the proposal of cell reselection parameters, the rsrq measurement quantity is considered to account for the increase of packet traffic in lte networks. Long term evolution 4g lte cell reselection, redirection and handover 2g3g4g.
This is applied to any mobile supporting gsm or cdma or hspa or any other network. This chapter addresses the radio resource management rrm techniques and reporting mechanisms that support user equipment ue mobility in the long term evolution lte network, including cell search, radio measurements, cell reselection, handover and radio link monitoring. Access class control technology in lte lte advanced systems 68 ntt docomo technical journal vol. Lte cell reselection from fach free download as powerpoint presentation. In a real life scenario it might be wise to set the thresholds lower if it is wanted to keep the ues in lte as long as possible. Reselection to a lower priority frequency or rat cell. In addition, the proposal is designed to improve the end user experiences such the lte. Fast reselection between different radio access technology networks. The primary purpose of cell reselection, regardless of intrafrequency, interfrequency, or interrat nature, is to ensure that the ue camps on or connects to the best cell in terms of radio condition, e. This live virtual course will answer all these questions and allow you to explore the area of lte mobility with examples from live networks.
The new cell is better ranked than the serving cell during a time interval treselection according to the r criteria. In manual mode, the mobile presents the user with the list of networks that it has. Lte cell camping and selection procedure techplayon. If you have new 4g network in your project and inter working system 2g to 4g will be set properly, this post will be useful for you. Rel8 lte 3g long term evolution evolved packet system ran part.
Priority radio link quality cell accessibility priority this is a parameter. The ue should conduct some measurements to support this procedure. Lte overview elearning required equipment none long term evolution lte is a leading contender for next generation broadband wireless networks, providing an evolution path for a variety of 3g wireless networks, such as umts and 1xevdo. User description, gsmumts lte cell reselection and handover. Cell reselection procedure wcdma to gsm cell reselection. These parameters include the power parameters and the parameters included in the system information broadcasts.
Lte release 8 and 9 supports single carrier operation with variable bandwidth from 1. Intralte and irat mobility with focus on the ran live. Cell selection allows a lte compliant ue to camp on a cell. We can combine open and closed loop transmit diversity with the receive diversity. The cell reselection process does not need to occur in conjunction with any specific contemplated handover decision. User description, gsmumts lte cell reselection and handover 4. Cell re selection procedure is the process by which uemobile finds the suitable cell to camp on. After camping on, ue monitors the system information to get the quality threshold and performs measurements for the cell reselection evaluation procedure. Reselection to a higher priority frequency or rat cell. Here, the cell reselection procedure is the same as explained in the previous document, emm. The ue moves toward enb5, triggering a cell reselection. On completion of this course, the participants will be able to. Quality measure for cell selection and reselection. The initial planning of any radio access network begins with a radio link budget.
The ue monitors system information and in most cases paging information. This page intentionally left blank lte for 4g mobile broadband do you need to get. Reference signal measurements rsrp,rssi,rsrq for cell. Telenor norway will ditch 3g before 2g, as lte rollouts gather. Lte offers significantly higher packet data rates, enabling advanced multimedia applications and.
Ue is free to do cell reselection either the serving cell rf carrier strength is poor or suitable high strength neighbour cell is available in the same rat or. In this paper, we provide recommendations for cell reselection parameter settings by. System parameters that control cell reselection and the operators channel frequency preferences are. The term cell selection criterion may be a vague expression, since there can be many different criteria from many different perspective. A network domain that provides services based on packet switching.
1297 881 1515 981 868 839 336 1216 155 455 1330 338 901 99 646 482 1056 1381 475 306 1110 813 990 78 32 277 1068 1104 625 198