DIFFERENCE BETWEEN relay cells AND FEMTO CELLS
Answers
Low Cost: The Business Model would be initially by offering Femtos as a consumer purchase through mobile operators
Low Power: around 8mW- 120 mW lower than Wi-Fi APs.
Easy to Use: Plug-and-Play easily installed by consumers themselves
Compatibility & Interoperability: Compatibility with UMTS,EVDO standards and WiMAX,UMB & LTE standards
Deployment: In Wireless Operator owned licensed spectrum unlike WiFi
Broadband ocnnected:Femto cells utilize Internet protocol (IP) and flat base station architectures, and will connect to mobile operator networks via a wired broadband Internet service such as DSL, cable, or fiber optics.
Relay transmission can be seen as a kind of collaborative communications, in which a relay station (RS) helps to forward user information from neighboring user equipment (UE)/mobile station (MS) to a local eNode-B (eNB)/base station (BS). In doing this, an RS can effectively extend the signal and service coverage of an eNB and enhance the overall throughput performance of a wireless communication system. The performance of relay transmissions is greatly affected by the collaborative strategy, which includes the selection of relay types and relay partners (i.e., to decide when, how, and with whom to collaborate).
Relays
Relays that receive and retransmit the signals between base stations and mobiles can be used to effectively increase throughput extend coverage of cellular networks. Infrastucture relays do not need wired connection to network thereby offering savings in operators’ backhaul costs. Mobile relays can be used to build local area networks between mobile users under the umbrella of the wide area cellular networks