Subject: Mobile Communication and Computing

Topic: Third and Fourth Generation Systems

Difficulty: Medium

To compete with other local loop technologies WLL needs tom [provide sufficient coverage and capacity, high circuit quality and efficient data services. Moreover the WLL cost should be competitive with its wire line counterpart. Various issues are considered in WLL development which includes:

1. Spectrum: The implementation of WLL should be flexible to accommodate different flexible bands as well as non-continuous bands. More these bands are licensed by government.
2. Service quality: Customer expects that the quality of service should be better than the wire line counterpart. The quality requirements include link quality, reliability and fraud immunity.
3. Network Planning: Unlike Mobile System, WLL assumes that user is stationary, not moving. Also the network penetration should be greater than 90%. Therefore WLL should be installed based on parameters like Population Density etc.
4. Economics: Major cost here is electronic equipment’s. In current scenario, the cost of such electronic equipment is reducing periodically.

In traditional telephone networks, your phone would be connected to the nearest exchange through a pair of copper wires. Wireless local loop (WLL) technology simply means that the subscriber is connected to the nearest exchange through a radio link instead of through these copper wires