Aboulhassanx, samer lahoudz, marc ibrahim, dany mezher, bernard cousinz, essam a. Systems beyond imt2000 imtadvanced is set to introduce evolutionary path beyond 3g. Intercell interference coordination icic technology. Lte is the global standard for next generation fdd and tdd. This application note gives an introduction to lte technology, including both fdd and tdd modes of operation. Zm8620 lte wireless data terminal cover letter request for ic. Intercell interference coordination icic in lte to aid downlink icic relative narrowband transmissionpower indicator a cell can provide this information to neighboring cells, indicating the part of the bandwidth where it intends to limit the transmission power. As a result, interference levels dropped for both celledge and cellcentre ues, resulting in a 28% gain for the cell edge ues and a. Pdf algorithms for enhanced inter cell interference coordination. Physicalcommunication32010217244 219 table 1 lte,lteadvanced,andimtadvancedperformancetargetsfordownlinkdlanduplinkul.
Intercell interference coordination icic is useful to increase cell capacity mitigate neighbor cell interference improve ue battery consumption all of the above 7. Which one of the following is not the characteristic of. Umts long term evolution lte technology introduction. If you want an extreme details, please refer to following article. Icic techniques in lte are mostly limited to the frequency domain, e. If you want to go a little bit more details than the previous one, please refer to following introduction. Isd urban 500m, 3 cells per site, channel bw 10mhz, cell capacity. Changes in the specification are limited to corrections and bug fixes. Intercell interference coordination icic plays a vital role in heterogeneous networks. The configuration of blank subframe in lte frame structure is transmitted over x2 interface by picocell and using oam by femtocells under closed subscriber groupcsg environment.
Icic and eicic background lte is designed for frequency reuse 1 to maximize spectrum efficiency, which means that all the neighbor cells are using same frequency channels and therefore there is no cellplanning to deal with the interference issues. Link budget and capacity estimation are introduced in. Just as ethernet and the internet have different types of qos, for example, various levels of qos can be applied to lte traffic for different applications. However, using the same bandwidth among adjacent cells leads to occurrence of intercell interference especially at the celledge. Nokia bell labs operates its headquarters in murray hill, new jersey, united states, and has research and development facilities throughout the. All three, with pretty much same amount of lte frequency bandwidths. Coordination feicic techniques considered in lteadvanced release 11. Trace data channel x pdf pdf is the probability density function of the signal. To introduce the lte basic principle, network planning method and rnp solution. Tarrad 1communication engineering department, alazhar university, cairo, egypt.
Traffic types include data and commands for electric meter, water meter, security panel, hvac. Survey of icic techniques in lte networks under various. Validating volte page 8 market need for volte even with the fast rise of web and data services in mobile networks, voice and sms services still generate around 70 percent of total operator revenues globally. Lte networks main challenge is to efficiently use the available spectrum, and to provide satisfying quality of service for mobile users.
However, with the arrival of smallcell and heterogeneous networks hetnets, the existing mechanisms are quickly approaching the interference limits predicted by gupta and kumar. This coordinated resource management can be achieved through fixed, adaptive or. Lte has the flat network architecture and physical layer applies ofdm technology, as well as the mimo, icic, etc. A cell receiving the indication can schedule its downlink transmissions within this band, reducing the output power. Lte attach procedure call flow the lte attach procedure call flow is a subject that may seem hard to understand. At one point, competition was stiff between wimax and lte over which technology would. Intercell interference coordination icic for lte small. Unlike icic, lte eicic reduces interference on both the traffic channels as well as control channels. Icic for hetnet, detection of eightlayer transmission, reference signals for enhanced multiantenna support, and hybrid automatic repeat abstract the commercial deployment of lte release 8 is gaining significant momentum all over the globe, and lte is evolving to lte advanced, which offers various new features to meet or. Lte uses universal frequency reuse n1 without soft handoff.
Enhanced intercell interference coordination eicic as noted in the previous post about icic, we will find out about enhanced intercell interference coordination eicic, an interference control technology in ltea in this post. Basic interference mitigation approaches consider bandwidth partitioning techniques between. Myung 2 beyond 3g international mobile telecommunications imt2000 introduced global standard for 3g. Lte advanced is the next milestone in the evolution of lte, starting from 3gpp rel. Lte tdd which is also referred to as tdlte provides the long term evolution path for tdscdma based networks. However, it is commonly believed that control channels such as the pdcch are more robust, so icic is not applied to the.
Guvenc is an associate editor for ieee commu nications. Mobile broadband driven by convergence of ip and lte. Intercell interference coordination icic techniques, present a solution by applying restrictions to the radio resource management rrm block, improving favorable channel conditions across subsets of users that are severely impacted by the interference, and thus attaining high spectral efficiency. With these revenues at stake, lte operators must have a path to provide highquality, tollgrade voice services natively on lte networks. As a result, interference levels dropped for both celledge and cellcentre ues, resulting in a 28% gain for the cell edge ues and a net 15% gain of the overall network capacity.
This article surveys the key features encompassing the physical layer, network layer and backhauling aspects of icic in lte, with specific focus on rel10 enhanced icic. Comparison static icic and adaptive icic on tdlte 1. Mobile class targets 100 mbps with high mobility and nomadic local area class targets 1 gbpswith low. Figure 2 shows an overview of a number of frequency partitioning methods. With the matured standards for lte, the long term evolution of the 3g services, eyes are now turning towards the next development, that of the truly 4g technology named imt advanced. Ltea, hetnet, small cells what you absolutely need to know. Intercell interference coordination for ltea nomor research. Intercell interference coordination icic technology dai kimura hiroyuki seki long term evolution lte is a promising standard for nextgeneration cellular systems targeted to have a peak downlink bit rate of 150 mbs. Pdf the success of lte heterogeneous networks hetnets with macro cells and pico cells critically. Survey of icic techniques in lte networks under various mobile environment parameters article pdf available in wireless networks 232. Lte advanced lte standardization has come to a mature state by now where changes on the specification are limited to corrections and bug fixes. Me906s158 lte module cover letter request for ic certification. Lte mtc coexists with todays mobile broadband services efficiently integrated with existing lte advanced spectrum and networks 1 assumptions.
Icic schemes for minimizing interference, culminating in the socalled enhanced icic in lteadvanced. Consequently, high levels of interference and low sinr can be expected near the cell edge. Lteadvanced be indoors, which helps provide isolation between the femtocell and the macrocell. Icic in dl and ul with network distributed and self. Lte includes an fdd frequency division duplex mode of operation and a tdd time division duplex mode of operation. This could be, for example, a way to provide local cellular coverage in rural areas where dsl exists. An introduction to long term evolution lte by robert nibarger and mallorie teubner. High transmission bandwidth is attained in lteadvanced by carrier. Abstract3gpp lteadvanced has started a new study item to investigate. Intercell interference coordination icic for lte small cells.
Pdf survey of icic techniques in lte networks under. Enhanced intercell interference coordination challenges in. A comprehensive survey on various icic schemes and proposed 3g rf interference mitigation techniques for ofdm downlink on cellular networks 1walid m. This makes the lte frame compatible with 3gpp r8 and lte r9. Lte wiki page a short tutorial on lte in wikipedia format. However, as adjacent cells use the same frequency, interference between adjacent cells may degrade. Lte wireless data terminal modular approval request details for fcc id.
Lte network planning includes coverage, capacity planning. Resource management and ici coordination in lte uplink system numerous solutions. Huawei lte for rail technical white paper page 4 1. Indicates to ue the size of the control region 1,2 or 3 ofdm symbols pcfich value may be 1, 2 or 3 0 is reserved for future use. Release 10 of the standard already introduces significant.
Operators can offer different maximum speeds depending on how wide frequency bandwidths. Enhanced intercell interference coordination in 3gpp release10. A comprehensive survey on various icic schemes and. Interference management within 3gpp lte advanced part iikonstantinos dimou, phdsenior research engineer,wireless access networks, ericsson researchkonstantinos.
Because the lte mac is fully scheduled, qos is a natural fit. Well first, the ue needs to register with the network to receive services that require registration. Access network eutran and long term evolution lte are used interchangeably in the sa working groups the term system architecture evolution sae was used to signify the broad framework for the architecture for some time the term ltesae was used to describe the new evolved system, but now this has become known as the evolved. Snap19 tags thermoelectric generator which was selected as the power. Issue briefs are designed for practitioners with limited time and a need to know about the latest industrybased knowledge. Frequency division duplexing fdd and time division duplexing tdd both paired and unpaired. Lteadvanced targets peak data rates of 1 gbps in the downlink and 500 mbps in the uplink 1 2. Lte qos lte architecture supports hard qos, with endtoend quality of service and guaranteed bit rate gbr for radio bearers. Enhanced lte icic vs eicic difference between lte icic,eicic.
A practical solution page 6 resource allocations to celledge ues. Indeed, lte was designed from the beginning with intercell interference in mind based mostly on past experience of the designers in wcdma networks. Traffic channel performance at the cell edge can be enhanced via icic. This requirement is fulfilled by a transmission bandwidth of up to 100 mhz 3 however, since the accessibility of such large part of contiguous spectrum is uncommon in practice. In lteltea, one key challenge for operators is that they have to increase network capacity to keep up with fastgrowing traffic. This registration is known as the network attachment. Cdma track 3gpp2 gsm track 3gpp 2001 2005 2008 2010.
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