Neighbour Location Based Channel Reservation scheme for LEO Satellite communication

Abstract

In wireless communication, low propagation delay and low power requirements of satellite are key requirements which makes low earth orbit (LEO) satellite preferable over others. Over the years a plenty of researches had been done in this field of satellite handover management, but the problem remains unsolved. One such method is the reservation of a few channels specifically for handover calls. One demerit of this scheme is that not all channels are available for allocation of new calls, leading to an increase in new call blocking probability. Also this scheme may lead to unnecessary reservation of channels for handover even when the number of handovers is very small. During such a period the reserved channels could have been used for allocation of new calls. So, in this paper we are going to propose a new Neighbour Location Based Channel Reservation scheme for efficient utilization of resources (channels) in handover and new channel allocation in LEO Satellite communication. In this scheme, we are reserving few channels in each spot beam especially for handoff based on the number of mobile stations in neighbour locations and the average handover call arrival rate. In the simulation, this approach reduces the unnecessary complexity and unnecessary reservation of resources (channels) which in turn reduces the complexity of the communication network.

Analysis of maximum traffic intensity under pre‐set quality of service requirements in low earth orbit mobile satellite system for fix channel reservation with queueing handover scheme

“…In order to be consistent with other previous publications (e.g. [4–14, 18–20]), the following typical assumptions that are relevant to the system model adopted in this paper are made: considered uniform business, the MTs are uniformly distributed and new calls arrive in any position of satellite cell network with the same probability. Even if LEO‐MSSs will be characterised by time‐varying and heterogeneous traffic conditions, we use the hypothesis of uniform traffic, because it allows generic performance evaluations which do not depend on specific traffic conditions [5].…”

“…In the early publication, the cellular hexagonal is adopted as the cell model [4, 5]. Now, in recent literature, for simple analysis, the cellular rectangle is used to model the cell [7–10, 14, 18–20]. In our work, each cell is modelled as a rectangular area with the same size.…”

“…Even if LEO‐MSSs will be characterised by time‐varying and heterogeneous traffic conditions, we use the hypothesis of uniform traffic, because it allows generic performance evaluations which do not depend on specific traffic conditions [5]. This assumption is also widely used and has been a typical and accepted assumption [4–14, 18–20]; the new call arrival processes and handover arrival processes are independent Poisson processes, respectively; the call duration time for users is exponentially distributed, and the channel holding time in a cell for both new calls and handover is also exponentially distributed; the average call origination rate is independent of the number of calls in progress; there is no propagation impairment in the links.…”

“…Combined TCRA and DDBHP, a TCRA was proposed in [13]. Other prioritised handover schemes, namely channel reservation have been put forward for reducing the handover failure probability [14–16]. DCA technical is also widely studied in [5, 6, 17].…”

A Novel Method to Determine the Handover Threshold Based on Reconfigurable Factor Graph for LEO Satellite Internet Network

“…The average number of handovers is related to the satellite coverage, the number of beams, and the satellite speed [41]- [42]. When the coverage and speed are constant, the more beams, the larger the lower bound of the average number of handovers.…”