High Efficiency Satellite Multiple Access Scheme for Machine-to-Machine Communications

Abstract

The work presented here describes the key design drivers and performance of a high efficiency satellite mobile messaging system well adapted to the machine-to-machine communication services targeting, in particular, the vehicular market. It is shown that the proposed return link multiple access solution is providing a random access channel (RACH) aggregated spectral efficiency around 2 bit/s/Hz in the presence of power unbalance with reliable packet delivery over typical land mobile satellite (LMS) channels.

VHF Data Exchange System (VDES): an enabling technology for maritime communications

“…At this stage of the standardization process the best suitable candidate protocol to be used in the satellite uplink of VDE is Enhanced Spread Spectrum Aloha (E-SSA) [14]. In E-SSA, the transmitters operate like in an (asynchronous) Aloha system but use direct sequence spread spectrum [15].…”

High-Efficiency and Low-Complexity Spread Spectrum ALOHA for Machine-to-Machine Communications

“…At the receiver side, the demodulator detects each packet using preamble detection. This procedure is described in detail in Section Ⅳ of [1] .…”

“…If more than 16 signature sequences are used, the probability of code collision is less than    [1] . In addition, the code ID proposed by C. Schlegel [10] can be used to guarantee a sufficient number of signature sequences.…”

“…The services offered by next-generation satellite networks (SATNETs) will extend to machine-to-machine (M2M) applications such as mobile messaging, supervisory control and data acquisition, disaster response, and telemetry [1] . The traffic type can be characterized by low volumes of data and dynamic occurrences from a large number of devices [2] .…”

Random access on graphs: A survey and new results

“…The principal practical applications are i) satellite networks [5], [12]; ii) terrestrial wireless networks [6], [10] including cellular, ad-hoc, and sensor networks; iii) machine-to-machine communications [14]; iv) shared memories. In all cases, the main problem is the contention among the sources and the need to share the channel resource [1], [2], [15], [16].…”