Galutinis pro sistemos prekybos sdn bhd klang
In this case, UEs have free access to the femtocell, because there is no differentiation in allowed and not allowed Closed Subscriber group CSG. In the Hybrid model, the femtocell equipment is provided by a company for an individual owner. Nemokamos ebooks dvejetainės parinktys this particular case, the UEs belonging to the CSG list have some privileges on the access to the femtocell; however customers not belonging to the CSG list can access the femtocell with restrictions.
Others are prohibited from accessing the Femtocell. These three types of access are described in more details below, showing the advantages and disadvantages of each one.
Social Technologies. Figure 4. The representation seen in Figure 4 shows a device connected to a macro cell, which enters within the femtocell coverage, and automatically updates its connection to the femtocell. The users are always connected to the strongest server macro dvejetainio pasirinkimo delta formulė or femtocell avoiding cross-tier interference, so the throughput of the network increases.
Inside homes or companies, this type of femtocells will be deployed in random locations. Being self-organization would be a good solution to galutinis pro sistemos prekybos sdn bhd klang the negative impact of femtocells in other cells.
On the other hand, when deployments are done by an operator, interference can be mitigated through the network planning and optimization. The location, power and frequencies assigned to each femtocell can in this case be planned in advance.
However, open access has some drawbacks as well, the biggest of which is the reduction of the performance of the femtocell owner, due to the sharing of the femtocell resources with non-subscribers.
Moreover, open access increases substantially the amount of handovers between cells due to the movement of outdoor users. A user moving into a residential area handovers from one femtocell to another, or to the macro cell.
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This will have a negative impact on the operator network because it increases the dropping probability of the call due to failure in the handover process. Different solutions have been proposed in which a centric sensing of the radio channel Tiago Carvalho Moreira, Michele Albano, Ayman Radwan, Jonathan Rodriguez. Alvaro Gomes. Business Model for Before open femtocells are widely deployed, research is required in order to support new algorithms to handle more neighbours and their different nature in a fast manner .
Nevertheless, open femtocells reduce the load of the macrocell network, and are advantageous for the network operators, who can either support new customers or save money in the macrocell operational costs, for instance by saving power.
Closed access In closed access mode, only a subset of the users CSGwhich is defined by the femtocell owner, can connect to the femtocell. If a non-subscriber enters in the femtocell coverage See Figure 4 the user cannot connect because the user does not have permission.
Nowadays, the closed model is the preferred model by customers for home femtocells.
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This decision is related to the full control of the femtocells and the list of authorized users. By law, femtocells must be able to perform emergency calls by everyone, even if not on the list of users of femtocell. This feature implies that some resources have to be released to non-subscribers, which is a minor drawback of galutinis pro sistemos prekybos sdn bhd klang model. The main problem of the closed method is the interference between femtocells.
To reduce this problem, the power radiated by the femtocell must be auto configurable to ensure that coverage is sufficient for subscribers and minimizes interference with neighbouring femtocells and macrocells. This can be done through self-optimizing the femtocell radiated power, where each femtocell sets its power to a value that on average is equal to the received signal strength from the closest macrocell at a target femtocell radius.
Another solution is the use of sector antennas in the FAPs Femtocell Access Point to minimize the overlapping of coverage areas .
The selection of an access control mechanism to femtocells has direct effects on the performance of the overall network, mainly due to its role on the definition of interference, so their features must be carefully studied.
Both access methods open and closed suffer from advantages and disadvantages, which can be seen in Table 2. Table 2. Closed vs. The impact that subscribers might feel that they are paying for a service that is exploited by others must be minimized in terms of performance or via economic advantages, like offer services or reducing costs .
Hybrid access In this type of galutinis pro sistemos prekybos sdn bhd klang, the femtocell provides not only authorization to CSG, but also to users who do not belong to CSG. Therefore, CSG members have special priority over other users.
This means that users who belong to CSG have priority in connecting to femtocell and also have a guaranteed minimum QoS. On the other hand, users out of CSG have limited QoS and when services cannot be provided to CSG users, due an interruption of femtocell resources, it shall be possible to continue the communication in another cell. To minimize the impact of connections of users not belonging to CSG, it is possible for the network to reduce the data rate of established communications of non-CSG users .
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There are many possible solutions to defining the hybrid model, i. Figure 5.
For each particular mobile system Wimax, UMTS, LTEthe average throughput and QoS per user can be increased deploying more small cells or sectors, cell sectorisation and optimizing the radio network, particularly minimizing the interference. One of the most attractive characteristics of the Hybrid access femtocells assumed private to the mobile operator is that it can provide a high quality of service at low expenses no site rent.
In fact, if the operator is also a fixed network operator, Hybrid access femtocells can increase its revenue providing xDSL connections that support the femtocells.
The main drawback of using open access public instead of closed access private is the high number of HO that may result to provide the continuity of the service to a user with high mobility.
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This fact implies a significant increase of signaling data in the network, higher call drop probability and lower QoS. Next section shows an alternative goal, which is saving energy on the mobile terminal side. To understand the role of the femtocell solution as a player in the mobile value chain, it is necessary to analyze which function each player has. With this approach and by analyzing the whole value chain, the mobile virtual network operator seems to be the closest function related to the femtocell deployments.
In fact, the femtocell solution cannot be seen as a content provider or content galutinis pro sistemos prekybos sdn bhd klang, because it does not provide any different content than actual macrocells to subscribers.
On the other hand, it shall provide voice and data services, which is the main role of an MVNO.
Finally, subscribers of femtocells have the role of consumers in the value chain, who only receive and use the service provided by femtocells. Concluding, the femtocell offers a number of important benefits for both consumers and operators. These benefits come without requiring users to make changes in their mobile terminals, due to the fact that the network femtocell technology is the same as the macro cell.
For mobile operators, the use of femtocells brings galutinis pro sistemos prekybos sdn bhd klang ways to offer attractive services for femtocells users, and represents a high cost effective way of increasing both network coverage and capacity at consumer homes.
C2POWER aims at leveraging on two novel techniques vertical handovers and cooperative relaying to realize energy saving on the terminal side. In particular, it considers Femtocells as a new network access type, and integrates it into existing long-range RATs. The visiting mobile terminal will save energy, and both the Network Operator controlling the femtocell and the user who is sharing a broadband access will get revenues.
However, in a few cases e. In this section we exemplify this alternative view by showing how a business model can be used to promote power efficiency on mobile equipments.
Figure 6. After deploying the femtocell equipment at home, John verifies that his femtocell provides coverage in the neighborhood of his house.
Figure 7. Indoor and Outdoor femtocell coverage 5. Conclusions A good business model is needed to make a company prosper by attracting customers, and by converting customer payments into profits.
This paper considers the telecommunication industry, and analyzes the role of the different actors in the overall value chain when proposing the introduction of femtocells into the scenario. A business model is provided, to show how both the network operator and the user can obtain benefit by the novel architecture.
The role of a business model in C2POWER is both to encourage network operators and users to adopt the solution, and to implement an energy saving policy in the system.
Future work will provide further study on the C2POWER approach by means of simulations and of techno-economic analysis, 6. References Rappa. Marx-Gómez, C. Rautenstrauch, A. Nürnberger, and R.
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Murata, M. Hasegawa, H. Murakami, H. Harada, and S. Markendahl, O. Makitalo, J. Phillip Olla, Andish V. A value chain model for mobile data service providers. Adam M. Brandenburger and Harborne W. Stuart, Jr. Alice Devine and Sanna Holmqvist. Mobile internet content providers and their business models, Stockholm C, Miguel. Telecom Practice, J, Rylander. Jie Zhang and Guillaume de la Roche.
Femtocells Technologies and Deployment, Wiley, Femtocelių verslo modelis: energijos taupymo galutinis pro sistemos prekybos sdn bhd klang Tiago Carvalho Moreira Telekomunikacijų institutas, PT Inovacijos, Portugalija, tiago-c-moreira ext. Verslo modelis galutinis pro sistemos prekybos sdn bhd klang pagrindinė priemonė siekiant, kad nauja technologija neštų pelną.
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Jos aprašymas gali būti naudojamas išryškinant naujos vartotojų naudojamos architektūros pranašumus. Turint tokį tikslą svarbu į verslo modelį pažvelgti kritiškai ir pasverti, į kurią vertės kūrimo grandinę konkreti technologija gali būti įtraukta.