Tài liệu Picocell Application Guide docx

PLANNING GUIDE Picocell Application Guide A Proven Way to Maximize Return-on-Spectrum When IP-enabled picocells first came onto the scene, they appeared to offer a new alternative to operators facing difficult coverage (and capacity) challenges. But they also made operators feel a bit uncomfortable. Using IP for backhaul made a lot of sense… but it was unfamiliar for network planners used to their trusted tools. Today, picocells have come a long, long way. They’re deployed by mobile operators all over the world as a fast, cost-effective solution to a wide range of coverage and capacity problems. As you’ll see, these applications start with in-building coverage, but extend far beyond as well. The ADC FlexWave ™ BSS solution is built around the world’s most deployed picocell. Since the product was launched, operators have taken it into all sorts of different places – some of which were never envisioned before. In every case, picocells were chosen for very simple, hard-nosed reasons: because they offer fast, cost-effective capacity and coverage in places your macro network finds hard to reach. The effect, in every case, is to maximize what we call Return-on-Spectrum. This guide is a brief summary of these application areas. It’s designed to help network planners think about coverage and capacity problems in different ways and to recognize ‘picocell-shaped’ problems in your own networks. It also will help staff from the commercial side of your business – such as enterprise customer account teams – who wish to provide alternatives to their customers and talk with authority about them. We hope you find the guide useful and that you’ll give us a call to discuss ADC’s complete solutions for your network challenges. Operators have been struggling with coverage and capacity problems since mobile communications were invented. Return-on-Spectrum Coverage, Capacity and Picocell Planning Guide Page 3 The Coverage Challenge Enterprises expect in-building service quality. • Coverage in the workplace is a major driver of dissatisfaction with operators – a consistent finding in all global regions. Where coverage is an issue, it’s • the dominant issue – a key reason for churn along with price and handset choice. Coverage is often the primary differentiator • between operators – and the decisive factor in awarding contracts. Source: Customer Survey, October 2005 The Capacity Challenge More people using more bandwidth-hungry • applications – it’s a recipe for capacity problems, especially in city centers. Adding new macro cells is expensive and • increasingly unpopular in many communities. Premium-rate data services demand ample • capacity, or quality of service suffers. “T-Mobile says it has found that poor in-building cellular coverage was the No. 1 reason its customers switched to rivals.” Business Week, June 27, 2007 Picocells: A Primer Picocells are a simple, time-tested solution for a range of coverage and capacity challenges. ADC’s FlexWave ™ BSS, the world’s most deployed picocell technology, is a robust, flexible system that includes the picocell, the controller and the manager. ADC has even added an outdoor hardened microcell to let you extend the benefits of this technology into the most challenging environments. The Picocell The nanoBTS picocell is a complete GSM base station that uses the standard Um interface to the handset and an Abis interface carried over IP for the backhaul. The nanoBTS offers: Support for EDGE and half rate AMR• Indoor coverage up to 125,000m• 2 Low-cost IP backhaul• Simple deployment – using a single • Ethernet connection for power, traffic and signaling Network Listen™ – supplements RF • planning, allowing the planners to see into the difficult indoor environment to optimize coverage and avoid interference Why Network Planners Use Picocells Fast coverage and capacity• Lower OPEX, with IP backhaul• Easy, flexible deployment• No cell distortion, interference • or handover problems Easy to integrate and manage• Easy to combine with DAS• Picocell Planning Guide Page 4 The Controller The FlexWave Base Station Controller (BSC) handles and routes all traffic between the picocells and your existing Mobile Switching Center (MSC) and Serving GPRS Support Node (SGSN). The high-availability BSC provides channel allocation and controls power-level algorithms and handover procedures. It’s a modular unit that uses IP connectivity between the picocells and the BSC, and a standard circuit-based A-interface to the MSC and SGSN. There also is an option to connect into architectures with softswitch MSCs. The BSC combines a processor module, signaling gateway, media gateway and frame relay gateway. It’s housed in an 8-slot compact PCI chassis for easy installation and expansion in a low-cost package. The Manager The FlexWave OMC-R (Operations and Maintenance Center – Radio) provides all the facilities needed for the operation and maintenance of the nanoBTS picocells and controller including configuration, performance and alarm management. The Microcell The FlexWave microBTS is a ”deploy anywhere” microcell that allows an operator to extend the benefits of the FlexWave solution beyond pure in-building applications. The microBTS offers: Same low-cost IP backhaul• Higher output power (microcell class)• IP 67-rated, compact enclosure• Extended temperature range• Maintenance-free passive cooling• Multiple transceivers options• MicroBTS Applications Business campus, hospitals and universities• Public hot spots, retail and sports venues• Convention centers and hotels• Transportation corridors, bridges • and tunnels Airports, trains and subway stations• Rural communities and other remote areas• For further information on ADC’s microcell solution, visit www.adc.com/wireless. Picocell Planning Guide Page 5 Picocells: Pros and Cons Pros: Picocells give you fast, low-cost coverage 1. where it’s hard to get your signal. Such as in buildings. They’re a great way to offer enterprise 2. customers guaranteed capacity and service quality in their offices. They provide cost-effective coverage 3. solutions for deployments ranging from 10–1000 people and beyond. They actually add capacity to your 4. network instead of draining it away. Think of a base station the size of a book. They cut your operating costs by using 5. existing IP for backhaul. They support fast data rates and high 6. voice capacity with half-rate AMR. They’re easy to integrate into any GSM 7. network. The Base Station Controller simply plugs into your MSC and SGSN. They’re easy to integrate into 8. DAS systems. As a world leader in DAS solutions, ADC can show you how to combine the benefits of both technologies. They’re quick and easy to install. A picocell 9. goes on a wall with four screws. Then an Ethernet cable is plugged in and it’s ready to use. They’re easy to take with you, if your 10. customer moves. They’re easy to manage using our 11. management software or feeding alarm and performance data into yours. They earn dramatically more minutes and 12. megabytes and significantly reduce the likelihood of churn. They’re proven. nanoBTS picocells are 13. already carrying billions of minutes each year for operators all over the world. Cons: Picocells are a new element to introduce 1. into your network. You may prefer not to have a new technology in there. Using Picocells requires learning about 2. IP. But not a great deal. It’s just a cheap, available source of backhaul. In some places, there may be no IP 3. available for backhaul. But you tend to find IP in places you don’t find base stations. And you can use satellite backhaul, too. Your network equipment vendor may 4. claim they won’t integrate easily. But they do. We’ll show you. Some people will think you’re spending 5. too much on 2G when 3G is the future. In reality, picocells cut your 2G infrastructure costs. Picocell Planning Guide Page 6 Application 1: Filling Macro Network Holes The problem Every network has black spots where coverage is marginal or non-existent. Even urban areas that enjoy excellent coverage overall usually have a few coverage holes due to geography, building layout or coverage strategy. And rural areas are notoriously difficult and expensive to reach with a conventional macro network. In areas with marginal coverage, service quality inside buildings can drop off sharply, resulting in dropped calls, ‘network busy’ signals, slow data rates and poor voice quality. And where coverage doesn’t exist at all, of course, there can be no revenues. The solution Picocells offer a fast, cost-effective solution for coverage problems. Inside buildings – Picocells add pinpoint coverage and capacity exactly where your high-value enterprise customers work. And by offloading the macro network, they improve service for the entire cell while delivering the best possible quality indoors. Additionally, where RF spectrum is limited, picocells offer better interference control and add more capacity in the network. Outside – ADC’s FlexWave ™ microBTS is an IP-based solution designed to increase RF coverage and capacity while reducing up front deployment costs and on-going operating expense. The microBTS is part of ADC‘s complete FlexWave Base Station System (BSS), supporting EDGE and AMR, with up to four GSM transceivers in one unit. Designed to stand up to the harshest environmental conditions and backed by ADC‘s high quality and support standards, the microBTS allows an operator to rapidly deploy in the most challenging areas of the network. For more information on the microBTS, visit www.adc.com/wireless. Considerations Is it possible to use the customer’s 1. broadband for backhaul or do we have to make other arrangements? Picocells need broadband (unless satellite is an option). Is the enterprise customer a prime 2. target? Enterprises love the benefits of their ‘own private base station’. Does the area have branch offices of 3. larger enterprise customers? Solving coverage for branches can secure the whole contract. Does the customer’s decision-maker 4. live out of range of the network? Many executives live in areas of poor coverage – a picocell in their homes may be the answer. City center 3G coverage Urban network map with coverage holes Network holes 2G coverage 3G coverage Suburban area 2G coverage Picocell Planning Guide Page 7 Application 2: Offloading the Macro Network The problem Providing good service means always having sufficient capacity available. But avoiding ‘network busy’ errors in commercial centers and large cities is becoming more difficult as usage levels increase, driven by competitive voice tariffs and attractive new data services. Subscribers are spending more time on the network doing new, more bandwidth-intensive activities. That may affect the quality of service operators provide to premium customers, like BlackBerry ® and other PDA users, who expect to be able to access services whenever they want. Providing the right level of capacity is tough in densely populated areas and it’s limited by the spectrum available to an operator. Simply adding new macro cells is expensive and time consuming. And public opposition to the introduction of more and more radio masts is increasing around the world as well, even if good sites can be found. An operator’s lack of capacity is not only a churn driver but a brake on new service uptake. The solution Picocells help maximize spectrum re-use: Unlike repeaters, picocells add capacity • to the network indoors and out. Using picocells to solve in-building coverage problems increases the capacity in the outdoor macro network. They remove the problems of cell distortion, • interference, handover and management in city center locations where macro BTS spacing can be as low as 200 meters. They provide sufficient extra capacity to • ensure that subscribers of premium rate data services get the better radio quality they need. Considerations Intelligent radio planning is the key 1. to getting more from your spectrum. ADC can help you solve planning problems so you get the best possible return on spectrum. It’s critical to manage the effects 2. of any in-building solution on the surrounding macro network. Properly deployed, picocells do not interfere with the macro network and actually improve its performance by offloading capacity. In-building picocells Abis-over-IP IP Network Existing core network MSC BSC OMC-R (clients) A Gb SGSN The Controller The Manager Picocell Planning Guide Page 8 Application 3: Business Parks The problem Recent years have seen an explosion in office developments at new business parks around the world. These modern sites frequently house some of the most dynamic, expanding businesses – and nearly all of them have demanding communications requirements. They represent lucrative opportunities for mobile operators that can get their services right. Many business parks are found on the edge of towns and cities where network coverage is poor or even non-existent because the location is far from the nearest macro BTS. Customers will simply not subscribe to a service if their phone does not work where they do. Frequently in the more distant locations, new macro deployment is uneconomic – there may not be enough traffic to warrant building new cells. And even if there is a case for building out the macro network, it will generally not be possible to do this quickly. The solution Picocells are a simple way to fill coverage holes and signal strength challenges: Deployment of ADC picocells is fast and • unobtrusive Provide high quality in-building coverage • that meets any customer requirement Customers feel the operator has responded • directly to their needs, building confidence and long-term loyalty The capital cost of picocells is not lost if the • customer moves or changes suppliers All new sites will have modern fixed line • infrastructure offering accessible broadband for backhaul Considerations Are there enough subscribers or 1. traffic to warrant investment by the operator? Picocells can often be deployed cost effectively even for a small office environment. Can the operator develop a strategy 2. to win business from all the companies at the park? By deploying picocells strategically across the business park, an operator can gain a reputation for providing the best coverage on site. Is the customer willing to underwrite 3. the cost of the picocell deployment? Picocells provide dedicated mobile coverage for the office, bringing significant benefits to a business customer. These benefits may be sufficient for the customer to fund the IP backhaul, or even subsidize the picocell deployment. Picocell Planning Guide Page 9 Application 4: High-rise Offices The problem High-rise office buildings proliferate in every crowded city. Signal strength tends to get weaker the higher you go, demonstrated by the fact that many operators refuse to guarantee their service above the 12th floor. Ironically, the problem stems from the large number of BTS normally found in crowded cities, as operators strive to guarantee outdoor service in places where most of their subscribers demand it. Increased BTS density forces the need for antenna tilts, which significantly reduce signal strength on the highest floors. In addition, as power is increased, interference from many BTS leads to poor signal quality. Unfortunately for operators, many companies locate their senior executives on the top floors of high rise buildings, precisely the people who are most sensitive to signal strength and quality. And, critically, these are the people who make the decisions about corporate mobile contracts. The solution Picocells can be used to target specific floors quickly and easily: They can be deployed in a few hours, • offering a quick, flexible solution to resolving coverage problems The small size of picocells and their ease • of installation means more flexible, cost- effective deployments Picocell radio output quality provides • superior coverage over several thousand square meters in a building Lower picocell power output poses minimal • interference challenges The most senior decision-makers at a • customer have their needs much better met, increasing loyalty and lowering the propensity to churn Considerations Would it be better to deploy a system 1. for the whole building? Picocells provide a quick, cost-effective and highly targeted solution if the problems are limited to the upper floors. How easy is it to get access to the 2. executive offices? Picocells can be installed very quickly, without the need to lay cables, thereby minimizing disruption. What are the radio planning 3. implications of introducing picocells? Interference, handover, security, neighbor issues and management are all built into the FlexWave BSS system to simplify network planning. Power levels can be tuned to provide highly targeted coverage and minimize interference with the macro network. Picocell Planning Guide Page 10 Application 5: Operator Retail Stores The problem Branded retail outlets have become the main way mobile operators promote and sell new services and devices to their customers. They spend a fortune to build an environment that sets them apart from the competition and they require an excellent signal for demonstrations, particularly for data services. The problem is that a store’s position inside a shopping mall may result in a poor signal, and even if position is not an issue, demonstration areas tend to be at the rear of the shop where coverage is invariably worse. Some shopping center owners also charge fees for mobile coverage rights, pushing up the cost of customer acquisition in what is likely to be an already expensive location. The solution Picocells offer a flexible, fast route to excellent coverage and signal quality in retail stores: Make use of existing IP connections used • for point-of-sale terminals Small footprint easy installation means • there is no need to involve the shopping mall owners Gives great coverage even in the most • difficult in-building environments Capacity can be reserved for data channels • with high throughput, enabling more effective demos of new services Considerations Do you have broadband connections 1. in all stores? Broadband is needed for picocell backhaul. Are data services demonstrated 2. in-store? Increasingly, new data services must be demonstrated to encourage uptake. How many stores are in hard-to-reach 3. locations? You might only need picocells in a few stores where location makes coverage and capacity an issue. Is there a demand for picocells now?4. Talk to your store staff about coverage and quality issues in-store. [...]... likely to move? Picocells can be removed and redeployed quickly and easily when a tenant moves Page 12 Picocell Planning Guide Application 8: Satellite-based Applications The problem Many mobile applications are required in areas where there is no broadband connectivity available for backhaul In these circumstances, operators are exploring the viability of satellite communications The key application areas... assumption that customers are dispersed equally throughout the target area Picocell Planning Guide Summary: Picocell Benefits for Operators and Customers Poor coverage and quality are major causes of business customer churn The nanoBTS picocell from ADC helps operators win and keep business customers by giving them their own private cells Picocells help operators: • Differentiate from commodity networks •... stations and reduces opex with simple, straightforward IP backhaul Key picocell benefits are: Conclusion As this guide illustrates, picocells are making a major impact on network planning in a wide range of applications They may not solve every planning challenge – but for getting fast, low-cost coverage and capacity to hard-to-reach places, picocells are increasingly the first choice in the network planner‘s... usage occurs during the peak hour 4 The number of nanoBTS picocells required to achieve full coverage of the premises is based on a rectangular floor layout and an operational range of a nanoBTS cell of 30 meters Picocell deployment Two nanoBTS picocells are required to achieve full coverage of the premises Based on the usage assumptions, two picocells are also sufficient to meet the in-building capacity... future The Solution Picocells furnish operators with the tools to provide targeted coverage for customers working in multi-tenant buildings: • A single picocell will usually cover a whole floor • They can be located in the heart of the building to provide coverage in difficult-toreach areas • Picocells can provide targeted RF coverage to allow closer frequency reuse • Multiple picocells can operate... traffic to warrant picocell deployment? Start with the buildings that get the most use 2 Think about the usage of the building in question Consider user demographics, length of stay, etc 3 Evaluate competitive performance Do competing networks out-perform yours in the buildings in question? Can you afford poor coverage or is it a potential cause of churn? Page 11 Picocell Planning Guide Application 7:... DSL line rental Furthermore, because picocells can be readily redeployed to other locations, the hardware cost could be depreciated over its working lifetime rather than the contract duration For example, by depreciating the hardware cost over a period of 7 years rather than 3 years, the cost per user is reduced to around $6 per month Page 14 Picocell Planning Guide Business Case 2: Macro Offload:... interference and frequency re-use issues 2 Is satellite connectivity already available? If so, adding picocells can be extremely cost-effective 3 How easy is it to route traffic into the mobile network? Integration with the core network is similar to systems that use DSL for backhaul Picocell Planning Guide Business Case 1: Improving Enterprise In-building Coverage: Turning Happy Customers Into Profits... up-to-date services It reduces churn and increases usage of mobile services With our picocells, operators can help sell new services while improving macrocell performance Picocells prevent operators over-spending on infrastructure because they enable ‘Pinpoint Provisioning’, adding coverage exactly where it’s needed Picocells provide a flexible, low impact and high-performance solution that integrates.. .Picocell Planning Guide Application 6: Difficult Buildings The problem Modern construction methods involve a bewildering use of materials and a range of innovative construction techniques While these may pass an occupant’s . PLANNING GUIDE Picocell Application Guide A Proven Way to Maximize Return-on-Spectrum When IP-enabled picocells first came onto the. move?2. Picocells can be removed and redeployed quickly and easily when a tenant moves. Picocell Planning Guide Page 13 Application 8: Satellite-based Applications