Tài liệu Urban Wireless Coverage Street-Level Service docx

CASE STUDY Urban Wireless Coverage Street-Level Service Background The increase in popularity of wireless devices has caused mobile subscribers to demand coverage anytime and anywhere. Wireless service providers are challenged with cost-effectively providing adequate coverage and capacity precisely where it is needed. This is particularly difficult in urban areas due to zoning restrictions and congestion from tall buildings that limit the placement of cell sites for additional capacity. The Problem A global wireless service provider was providing service to a busy urban area in Manhatten. The existing cell site was located on the 12th story of a 14-story building at the intersection of two busy streets. Three sectors of the cell site were being used to provide macro coverage, with antennas located on the roof of the building. A fourth sector was used to provide street-level coverage via an analog fiber transport system, with antennas located on the side of the building. However, the coverage in the area was not adequate to meet subscriber needs. The ADC Solution ADC leveraged the existing cell site by installing its all-digital Digivance ® Long-Range Coverage Solution (LRCS) to replace the analog transport system. Digivance LRCS uses patented digitized RF transport technology to extend seamless wireless coverage from existing cell sites to hard-to- reach areas or distribute capacity from centralized radio suites. CASE STUDY Web Site: www.adc.com From North America, Call Toll Free: 1-800-366-3891 • Outside of North America: +1-952-938-8080 Fax: +1-952-917-3237 • For a listing of ADC’s global sales office locations, please refer to our Web site. ADC Telecommunications, Inc., P.O. Box 1101, Minneapolis, Minnesota USA 55440-1101 Specifications published here are current as of the date of publication of this document. Because we are continuously improving our products, ADC reserves the right to change specifications without prior notice. At any time, you may verify product specifications by contacting our headquarters office in Minneapolis. ADC Telecommunications, Inc. views its patent portfolio as an important corporate asset and vigorously enforces its patents. Products or features contained herein may be covered by one or more U.S. or foreign patents. An Equal Opportunity Employer 103210AE 7/06 Revision © 2006 ADC Telecommunications, Inc. All Rights Reserved The Digivance LRCS Host Unit was installed in a 19-inch rack alongside the radios in the 12th floor cell site. Four radios were connected to the host unit. ADC’s wavelength division multiplexing (WDM) feature allowed the service provider to reduce the number of fiber cables required, keeping additional fibers free for other applications. The Digivance LRCS Remote Unit was installed in the basement of the building. The versatility of the system allowed the service provider to choose to have the unit wall- or pedestal-mounted. Two antennas mounted on the outside of the building channeled wireless signals in either direction of the intersection. Within two hours of unpacking the ADC product, the digital RF transport system was operational, with a noticeable increase in the number of calls being made. Digivance LRCS provided seven times the RF output power of the system it replaced. Therefore, two additional radios were installed, providing 50 percent more capacity to accommodate the increased traffic. Digivance LRCS easily accommodated the increase in capacity, with the flexibility to handle additional radios should they be required later. Benefits Realized by the Customer The flexible architecture of Digivance LRCS allows capacity and coverage to be distributed precisely where needed. In this case, the new and existing base station capacity was centralized at the 12th story cell site, eliminating the capital and operating costs associated with locating a new cell site. Digivance LRCS provides increased flexibility in configuring the existing capacity for maximum utilization. The increased RF output power of Digivance LRCS has already enabled the service provider to expand the number of base radios serving the area, but it can also accommodate additional capacity should it be needed later. Optimizing radio capacity will result in increased profitability for the service provider. Upon turn-up of ADC’s digital RF transport system, the service provider’s received signal strength and signal quality immediately improved. Subscribers will be able to place more and longer calls and experience fewer dropped calls, increasing customer satisfaction and improving quality of service. Since quality of service is directly related to subscriber churn, the service provider is likely to increase customer retention and avoid the acquisition costs of replacing a dissatisfied subscriber base, having a positive impact on revenue and profitability. Digivance LRCS is designed to be a very cost- effective solution. The optional WDM module allows the RF signal to be transported over a single fiber cable, conserving a second valuable fiber for another revenue-generating activity. In addition, the digital RF transport platform enables the transition to future capabilities such as dense wavelength division multiplexing and free space optics links. The element management software in Digivance LRCS simplifies operation and maintenance of the system(s). The Digivance Element Management System (EMS) provides operational and maintenance capabilities for up to 15 Digivance LRCS links. Remote alarm monitoring from the network operations center reduces troubleshooting time. The Digivance EMS also provides local alarm networking of multiple systems for monitoring and control. The modularity of the Digivance LRCS system is another advantage. In the unlikely event of a failure, the specific module requiring service can be removed and a replacement module inserted. In contrast, some other systems require the entire unit to be dismounted from the wall and sent back to the vendor for repair. Furthermore, Digivance LRCS offers optional battery backup in the case of a power failure – an important feature since each minute of service can result in additional revenue for the service provider. ADC offers full installation support for Digivance LRCS. Within just two hours of unpacking the system, Digivance LRCS was transporting calls. Comparatively, the service provider had to install the existing analog system itself, and it reportedly took weeks to become fully functional. . STUDY Urban Wireless Coverage Street-Level Service Background The increase in popularity of wireless devices has caused mobile subscribers to demand coverage. for additional capacity. The Problem A global wireless service provider was providing service to a busy urban area in Manhatten. The existing cell site