Introduction

WALKair^TM is a state of the art Point-to-Multipoint (PMP) wireless system, designed to provide an optimal solution for a variety of wideband and broadband applications.

The system, with its innovative technology features, provides data and voice services of fiber-optic quality, essential for high speed Internet access and other data applications. Small and Medium business (SME) as well as office and residential buildings (RTTO/RTTB) can benefit from high quality voice, high speed Internet access and other data services.

WALKair also serves as an efficient feeder to wireless micro-cells, providing backhaul connectivity for base stations of mobile and fixed narrowband wireless systems. With our system, new operators can enjoy a successful, quick and cost-effective penetration process into the telecom market.

Figure 1. Typical WALKair Application

2 WALKair^TM Network Applications

WALKair is designed to meet a set of requirements that are common to PMP applications in many cases. The specific requirements of a certain Telecom operator may vary, however, according to the profile of its specific application. Different priorities may be given to different requirements as a result of differences in needs, competitive environment, regulation, etc.

2.1 The Business Customer Application: High Growth Potential Solution Optimized for SME Access

Business customers are typically located in independent customer sites over an urban/suburban area. The covered area may be large - several hundred square kilometers, or small - a few square kilometers. The average capacity requirement per customer may vary significantly from one area to another. The number of customer sites and the average capacity per customer are expected to grow significantly within few years.

WALKair is designed to suit WLL applications for business customers. The system directly connects locations of small- and medium-business customers providing wireline quality service of PABX, data and high speed Internet connection. Typically, these services carry n x 64 Kbps channels, up to two E1 trunks.

As can be seen in the following figure, the customer’s PABX and data equipment are connected to WALKair via the Terminal Station (CPE). At the network access point, the Operator’s voice and data switches are connected to WALKair via the Base Station (BS).

Figure 2. WALKair serving the business customer PMP application

WALKair provides substantial technical , economical and competitive advantages to the Operators:

Better Bandwidth Efficiency

· Efficient frequency of 2.5 bits/s/Hz

· Flexible and dynamic real time allocation per user for high-speed Internet access

· Voice and data concentration using Bandwidth-On-Demand for increased radio efficiency, capacity, and higher throughput

Quality of Service

· Fiber Optics equivalent voice and data service

· Efficient traffic management including Bandwidth reservation and priority mechanisms for sensitive & high priority traffic

Cost Effectiveness

· All-in-one wireless access network for all business applications with full range of Telecom services such as Leased Line (from fractional E1 to full E1), BR-ISDN to PR-ISDN and Frame Relay

· Cost structure tailored to the new operator needs: low start-up cost, linear growth, low life cycle costs

· Best cost achievement using radio-to-building

· Outstanding economical performance

· Future proof with high growth potential

Robustness

· Automatic frequency selection and auto interference prevention scheme

· Modular and fault tolerant architecture

2.2 The Radio To The Building Application: Best Cost Achievement

Small business customers and Residential buildings typically require low Bandwidth. Several such customers, that reside on the same building can be served using a single radio connection to the building.

WALKair provides an ideal solution for the Radio To The Building (RTTB) and Radio To The Office (RTTO) application. The operator can provide voice and data services to the entire building, using a single CPE unit (radio link).

In addition to the SME application advantages, the RTTB/RTTO application offers the best cost effective service to the operator.

Figure 3. WALKair serving the RTTB/RTTO application

2.3 The Feeding Application: Efficient backhaul Transmission

The PMP can be used for feeding the Base Stations of narrowband wireless network, typically in urban and suburban areas, where continuous area coverage and high capacity requirements call for PMP backhaul transmission system. PMP allows for a more cost effective area coverage than the traditional Point To Point microwave links.

WALKair is designed to meet a set of requirements that are common to many backhaul transmission applications, regardless of the type of narrowband wireless network that it feeds.

In populated areas, such as urban and suburban areas, the base stations of Mobile (and/or WLL) systems are scattered in large quantities per area. Typically, we can expect a base station per 1-2 sq. km. (depending on the nature of the Mobile or WLL service and the technology and geographical structure of the area). These base stations are fed by trunks from the BSC or the network access point. The bandwidth of these trunks are in the range of sub E1 to a few E1s per base station. In many cases, at one such physical location there are a few base stations using sector antenna. Such a scenario is best served by a wireless PMP such as WALKair.

The following diagram describes this application in the common case of narrowband residential WLL system.

Figure 4. WALKair serving as backhaul feeding of WLL/mobile base stations

WALKair is a typical solution for this application, which offers substantial advantages:

Simple backhaul Structure

· Simpler of the backhaul structure with superior area coverage and flexible bandwidth support (fractional E1 to 2xE1), ensuring traffic averaging

· Simple and easy planning and installation.

· Transparent access for all traffic and signaling

Cost efficiency

· Significant cost reduction of overall backhaul network compared to PTP alternative

· Modular architecture allows expedient feeding for various network capacities

Þ Basic configuration is highly economical in both volume and power capacity.

Þ Modular configuration that allows for gradual and easy bandwidth growth from a minimum of 1 link supporting 6-8 median capacity base stations to a maximum of 16 links supporting 100-120 median base stations.

High Capacity

· Large backhaul capacity per area, enabled by the excellent spectral efficiency of the WALKair radio interface.

· Cost and traffic averaging is enabled using flexible bandwidth allocation, ranging from a 64 Kbps to 4 Mbps, which provides a mixed capacity channels to different base stations while efficiently utilizing the available bandwidth.

· Flexible and more efficient bandwidth management allowing for varied capacities to the same base stations in different hours of the day :

Þ High capacity to highway areas (especially at rush hours) and business areas, at day time.

Þ High capacity to entertainment and residential areas, at evening time.

Quality

· Backhaul transmission by highly reliable radio links and additional redundancy options

· Automated RF allocation to the Terminal Station allows for:

Þ Avoiding field measurements in order to find the best frequency for each site.

Þ Avoiding frequency changes, in cases where there is interference.

Þ Increasing system robustness and availability which reduces operational costs.

Date: 2015-01-11; view: 557