 |
Journal articles
A Dynamic Clustering Algorithm for Multi-Point Transmissions in Mission-Critical Communications
Abstract : Reliable group video call is one of the main services offered by future Mission-Critical Communications (MCC). To support its requirements, coordinated multi-point transmission in multi-cell environments is an attractive feature for MCC over Multimedia Broadcast Multicast Services owing to its potential for coverage improvement and multicast transmission. In such a scheme, full cooperation among all cells of an area achieves the highest cooperative gain, but has stringent impact on system capacity. A trade-off in the cluster's size of serving cells thus arises between high Signal to Interference plus Noise Ratio (SINR) and network capacity. In this paper, we formulate an optimization problem to maintain an acceptable system blocking probability, while maximizing the average SINR of the multicast group users. For every multicast group to be served, a dynamic cluster of cells is selected based on the minimization of a submodular function that takes into account the traffic in every cell through some weights and the average SINR achieved by the group users. Traffic weights are then optimized using a modified Nelder-Mead simplex method with the objective of tracking a blocking probability threshold. The proposed clustering scheme is compared to full cooperation and to Single-Cell Point-To-Multipoint (SC-PTM) schemes. Results show that dynamic clustering offers the best trade-off between coverage and capacity for MCC.
Cited literature [35 references]
https://hal.telecom-paris.fr/hal-02895678
Contributor : Marceau Coupechoux Connect in order to contact the contributor
Submitted on : Friday, July 10, 2020 - 8:46:16 AM
Last modification on : Tuesday, November 16, 2021 - 4:14:54 AM
Long-term archiving on: : Monday, November 30, 2020 - 6:54:54 PM
Contributor : Marceau Coupechoux Connect in order to contact the contributor
Submitted on : Friday, July 10, 2020 - 8:46:16 AM
Last modification on : Tuesday, November 16, 2021 - 4:14:54 AM
Long-term archiving on: : Monday, November 30, 2020 - 6:54:54 PM
File
twc20.pdf
Files produced by the author(s)