3G

3G systems will provide access, by means of one or more radio links, to a wide range of telecommunication services supported by the fixed telecommunication networks and to other services that are specific to mobile users. A range of mobile terminal types will be encompassed, linking to terrestrial and/or satellite-based networks, and the terminals may be designed for mobile or fixed use

3G Information

Key features of 3G systems are a high degree of commonality of design worldwide, compatibility of services, use of small pocket terminals with worldwide roaming capability, Internet and other multimedia applications, and a wide range of services and terminals. According to the International Telecommunication Union (ITU) International Mobile Telecommunications 2000 initiative ("IMT-2000") third generation mobile ("3G") system services are scheduled to be initiated around the year 2000, subject to market considerations. The following Table describes some of the key service attributes and capabilities expected of 3G systems:

3G System Capabilities

Capability to support circuit and packet data at high bit rates:
144 kilobits/second or higher in high mobility (vehicular) traffic
384 kilobits/second for pedestrian traffic
2 Megabits/second or higher for indoor traffic
Interoperability and roaming
Common billing/user profiles:
Sharing of usage/rate information between service providers
Standardized call detail recording
Standardized user profiles
Capability to determine geographic position of mobiles and report it to both the network and the mobile terminal
Support of multimedia services/capabilities:
Fixed and variable rate bit traffic
Bandwidth on demand
Asymmetric data rates in the forward and reverse links
Multimedia mail store and forward
Broadband access up to 2 Megabits/second

Air-Span Wipll

Airspan's WipLL platform is a low-cost high-performance Fixed Wireless Access system designed to deliver high-speed data, Voice over IP (VoIP) and multimedia services to residential, small business and enterprise customers. WipLL is capable of delivering burst data speeds of up to 4 Mbps (3.2Mbps net) to each customer. WipLL introduces real-time adaptive modulation (2-, 4-, 8-level FSK (Frequency Shift Keying) A simple digital modulation technique that uses two frequencies for 0 and 1. See frequency modulation. ) and auto retransmission Retransmission might refer to:

• Retransmission (data networks), the resending of packets which have been damaged or lost
• Replication of a signal at a repeater

request (ARQ (Automatic Repeat reQuest) A method of handling communications errors in which the receiving station requests retransmission if an error occurs.ARQ - Automatic Repeat Request ); features that offer high quality services whilst maximizing spectrum utilization. WipLL is available in both licensed bands (700 MHz (MegaHertZ) One million cycles per second. It is used to measure the transmission speed of electronic devices, including channels, buses and the computer's internal clock. A one-megahertz clock (1 MHz) means some number of bits (16, 32, 64, etc. , 2.5GHz, 2.7-2.9GHz and 3.4-3.8GHz) and unlicensed bands (900MHz, 2.4GHz and 5.8GHz). AS4030 is a high-end broadband wireless system for access and distribution applications, typically used to provide service to business applications and for Cellular/Backhaul Trunking. Based on robust WiMAX-based OFDM technology that can provide service in Line-of-Sight and Non Line-of-Sight deployment situations, AS4030 can deliver just IP, or IP and E1/T1s services. The product is ideally suited to providing service bundles to small and medium business consisting of a dedicated 2Mbit/s IP connection combined with a full or fractional E1/T1.