DRIVER UPDATE: AOPEN ALN-328
Aopen ALN-328 Driver
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Aopen ALN-328 Driver
First of all, network capacity can be increased.
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According to[ 5 ], OFDMA-based technologies, such as LTE, Aopen ALN-328 very close to the Shannon Limit, and the only way to surely increase the capacity of a single wireless link is to put the transmitter and the receiver closer to each other, as in the rationale of LTE femtocells. In this way, it is also Aopen ALN-328 to significantly offload the macrocell due to the relevant quota of traffic that femtocells are expected to serve.
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Being unfeasible a centralized Aopen ALN-328 planning, in fact, the interference management becomes one of the main issues and new Aopen ALN-328 must be found to this regard. There are several interesting problems that could arise with a wide deployment of LTE femtocells, which have to be carefully accounted for in order to exploit all the potential of this new promising technology.
Aopen ALN-328 uncoordinated setup of HeNBs, carried out without taking into account the location of macrocells and the bandwidth allocation plan, brings to Aopen ALN-328 increment of the interference level. In these conditions, a mobile operator could not be able to easily apply optimized RRM procedures.
We can Aopen ALN-328 two kinds of interferences: The former is produced by a HeNB on users served by other femtocells. The latter, instead, defines the Aopen ALN-328 between femtocells and macrocells that share the same portion of the spectrum.
In this context, the research community is deeply investigating innovative solutions for mitigating the inter-cell interference, furnishing such cells with self-organization and cognitive capabilities[ 22 ]. The basic idea is Aopen ALN-328 spectrum assignment should be performed on Aopen ALN-328 distributed basis, by allowing each HeNB to measure the radio environment and to autonomously identify the Aopen ALN-328 frequency bands that minimize the impact of the inter-cell interference.
Since femtocells are expected to be deployed in several environments e.
A typical HeNB deployed by a mobile operator can be setup for working in Aopen ALN-328 access mode i. In this way, any user, located in its coverage area, can take advantage from the higher capacity offered by the femtocell. From another side, a femtocell, installed by Aopen ALN-328 consumer for domestic uses, has to operate in restricted access mode: At the same time, it could assign a certain amount of radio resources to other users, offering them a minimum service level[ 24 ].
A practical example of this policy is the world wide spread FON model, which has been Aopen ALN-328 conceived for the WiFi technology[ 25 ]. This aspect becomes very critical for femtocells due to the limited computational capabilities of HeNBs: As a consequence, the research of lightweight RRM techniques remains fully open to novel approaches and methodologies. Aopen ALN-328
Another typical problem of femtocell deployment is strictly connected to user mobility: This aspect can become very critical because, despite base stations are connected among them using a dedicated protocol suite i. Also in this case, the research of novel Aopen ALN-328 to counteract the impact Aopen ALN-328 handovers would be highly beneficial for the deployment of LTE femtocells[ 29 ].
Within this Aopen ALN-328, some study has Aopen ALN-328 carried out see, for instance,[ 30 ]but without any explicit reference to femtocells. Mainly due to the absence of final specification documents from 3GPP, this means that a common procedure and consequently a common modeling framework to let the researchers properly compare their results are missing.
Therefore, we claim that a flexible simulation platform will support well all the activities of researchers, industries, and standardization bodies that intend to design new network architecture, protocols, and algorithms for next Aopen ALN-328 broadband systems. In what follows, we will briefly summarize LTE-sim key aspects and we will describe the details of the newly developed features.
It encompasses several aspects of LTE networks, including the models of Aopen ALN-328 the E-UTRAN and the evolved packet system, downlink and uplink transmissions, single Aopen ALN-328 multi-cell environments, QoS management, multiusers environment, user mobility, handover procedures, and frequency reuse techniques.
In addition, the software supports also well-known scheduling strategies such as Proportional Fair, Modified Largest Weighted Delay First, and Exponential Proportional Aopen ALN-328, Log and Exp rulesAdaptive modulation and coding scheme scheme, channel quality indicator CQI feedback, and several other aspects related to the LTE technology. The high flexibility and modularity of LTE-sim allowed us to devise a complete system for simulating LTE femtocells, built on top of existing features such as application objects, tracing, interaction among macrocells, interference computation, mobility, handover procedures, and so on.
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The Aopen ALN-328 module required the upgrade and the addition of classes and functions Aopen ALN-328 as: In fact, Aopen ALN-328 believe that the open nature of this software would facilitate the cross-validation and the integration of different approaches proposed by researchers and practitioners working in this field, thus accelerating the progress of the knowledge in this scientific domain.
Similarly to the eNB, it is identified by an unique ID and its position is defined into a Cartesian system.
It keeps track of information related to all registered UEs, like the UE identifier, CQI Aopen ALN-328, uplink channel quality, and uplink scheduling request i.