The future sees a clear trend of data rate increase in both wireless and wireline broadband access. These access networks may experience a dramatic increase of energy consumption in provisioning higher bandwidth as well as for other reasons [8, 28, 61]. For example, to guarantee a sufficient signal-to-noise ratio (SNR) at the receiver side for accurate recovery of high data rate signals, advanced transmitters with high transmitting signal power and advanced modulation schemes are required, thus consequently resulting in high energy consumption of the devices. Also, to provision a higher data rate, more power will be consumed by electronic circuits in network devices to facilitate fast data processing. Besides, high-speed data processing incurs fast heat buildup and high heat dissipation that further incurs high energy consumption for cooling. It is estimated that the access network energy consumption increases linearly with the provisioned data rate. It has also been reported that the LTE base station (BS) consumes more energy in data processing than the 3G UMTS systems [108, 119], and the 10-Gb/s Ethernet PON (EPON) system consumes much more energy than the 1-Gb/s EPON system. This chapter focuses on green passive optical networks, the wireline aspect discoursed in great details on how to green broadband access networks ..
All Science Journal Classification (ASJC) codes
- General Chemical Engineering
- General Mathematics
- General Materials Science
- Energy Engineering and Power Technology
- General Engineering