Integration of Fade Mitigation within centrally managed MF-TDMA/DVB-RCS networks

Abstract

This paper addresses the integration of a Fade Mitigation Technique (FMT) within a centrally managed MF-TDMA satellite network in the context of guaranteed QoS delivery. Burst Length Control (BLC) is introduced as a suitable FMT and the methodology of its design and implementation within the existing DVB-RCS standard is described and simulated. The proposed technique provides compensation for rain attenuation at the expense of capacity utilisation. Within any fixed partition of the MF-TDMA space, by considering the space-time properties of rain attenuation, suitable geographical multiplexing of rainattenuated and non-attenuated links allows the optimisation of the channel capacity utilisation while still exploiting the statistical multiplexing of the sources on the return channels.

Rain granularity effects on bandwidth demand for faded DVB‐RCS systems

“…In [6], the SNR is estimated using Markov model, on the basis of the worst case link condition, which may lead to a waste of bandwidth. Other researchers estimate SNR by averaging the SNR values measured for a given duration [9].…”

Dynamic resource allocation for DVB‐RCS networks

“…Therefore, it remains constant during the connection, thus wasting bandwidth. In [16], the SNR prediction is made using an SNR estimator based on averaging the received SNR over many bursts of the same connection. In [15], the satellite channel is modeled using a semi-Markov chain with two states and the appropriate set of FEC/ source codes is selected to dynamically compensate for fading variations.…”

“…The resource assignment problem in MF-TDMA uplinks has not been treated extensively. It has been dealt with by using either heuristic approaches [25] or Bin-packing procedures [16], anyway lacking an exact analysis. Only in [19], a Bin-packing algorithm is proposed to solve the resource assignment problem, but it achieves to maximize system throughput only for a limited range of system parameters values.…”

“…By combining uplink power control (ULPC) with adaptive bit and code rate as FMTs, a considerable potentiality to counteract fading conditions is obtained that should be integrated in the design of an efficient resource allocation protocol. A number of dynamic resource allocation algorithms employing appropriate FMTs to counteract fading have been analyzed in [15,16]. Although these methods achieve the adaptation of transmission parameters to link conditions, they do not provide a complete analysis of the satellite link.…”