Fiber-Wireless Convergence in Next-Generation Communication by Massimo Tornatore, Gee-Kung Chang, Georgios Ellinas
By Massimo Tornatore, Gee-Kung Chang, Georgios Ellinas
This booklet investigates new permitting applied sciences for Fi-Wi convergence. The editors talk about Fi-Wi applied sciences on the 3 significant community degrees desirous about the trail in the direction of convergence: method point, community structure point, and community administration point. the most subject matters could be: a. At process point: Radio over Fiber (digitalized vs. analogic, standardization, E-band and past) and 5G instant applied sciences; b. community structure point: NGPON, WDM-PON, BBU Hotelling, Cloud Radio entry Networks (C-RANs), HetNets. c. community administration point: SDN for convergence, Next-generation Point-of-Presence, wireless LTE Handover, Cooperative MultiPoint.
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Additional resources for Fiber-Wireless Convergence in Next-Generation Communication Networks: Systems, Architectures, and Management
Example text
Due to spectrum sharing with other Wi-Fi radio access technologies in unlicensed spectrum bands and opportunistic non-contiguous channel access nature of LTE-U, the support for FD-LTE results in spectrum inefficiency and ineffective spectrum utilization. By resorting to TD-LTE, the limited spectrum resources can be fully used for uplink and downlink communication, multiplexed across different sub-frames. 3GPP Release 13 supports TDD operation of LTE CC only in the downlink, whereas from 3GPP Release 14 onwards, the full bidirectional operation of the LTE CC is supported in TDD.
The transmissions of the identical signals from multiple synchronized eNBs on the same PRBs yield a higher SINR as a result of this over-the-air combining effect. This is typically useful in improving the performance of cell-edge UEs in denser eNB deployments, whose channel conditions are marred by higher inter-cell interference. On the other hand, cascading the synchronization on data transmission and resource allocation across a higher number of eNBs would be detrimental if some of them do not contribute significantly to an increase in SINR for an average individual UE.
The synchronous operation of downlink and uplink transmissions across cells requires transmissions to be intelligently scheduled to manage interference. FFR partitions the licensed frequency bands of the operator into chunks of non-overlapping sub-bands and deploys them over the adjacent eNBs, 32 R. Sivaraj and P. Mohapatra while reusing a fraction of the sub-bands commonly over all the eNBs. The reused frequency resources are meant for serving the UEs at the cell center that normally get reduced interference from adjacent eNBs and stronger links from their respective serving eNBs to which they are associated.