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A key challenge of convergence is delivering high bandwidth imagery, video and data products to the dismounted soldier without the benefit of garrison infrastructure. The Global Broadcast Service (GBS) Joint Program Office (JPO) is realizing this vision with the adaptation of their transportable IP networked satellite terminal into a manpackable Receive Suite (RS) permitting single person transport,...
The wideband global SATCOM (WGS) system is currently operational in the Pacific Ocean using WGS1 (175E). GBS traffic is supported in that theater today using the digital video broadcast by satellite (DVB-S) and operates using terminals originally designed for operation using the UHF follow-on satellite (UFO8). These terminals can now operate over WGS1 and UFO8. GBS is planned to migrate to the joint...
Input to JTRS' future increment products may present an opportunity to address the design and the operational needs for MUOS handheld terminals. In terms of capacity, bit rate, coverage, availability and portability, MUOS handheld terminals provide significantly enhanced warfighter capability over the existing UHF satellite communication (SATCOM). In addition, it fulfills the needs for the hereto...
As advanced communications techniques reach capacity, have reduced performance or system availability, or become unusable, the warfighter must have a reliable, high-capacity communications system in place and standing ready to supplant the degrading systems. Events in the recent past have shown satellites vulnerable to a number of ills or potential problems that could be debilitating. This paper addresses...
With the continuing launch of the wideband global satellite communications (WGS) constellation, the Department of Defense (DoD) will have the opportunity to transition many existing military satellite communications networks from commercial satellite bandwidth to the military-owned satellite resources. Transition to WGS will provide the warfighter with additional capacity to augment future satellite...
COCOMs and G/RSSCs need the ability to rapidly, accurately, and conveniently perform mobile user objective system (MUOS) communications usage planning and to determine if a particular allocation is sufficient so as to, if necessary, negotiate an adjusted apportionment. This paper discusses the design goals of a stand-alone MUOS communication planning application that satisfies these planning objectives...
A future satellite communications system is envisioned that will provide a number of enhancements over predecessor satellite communication systems. It will employ high capacity packet switched service in space, high rate circuits between terminals, and utilize Dynamic Bandwidth Resource Allocation which dynamically assigns resources to terminals based on current channel conditions and traffic demand...
Based on Universal Mobile Telecommunications System (UMTS) wideband code division multiple access (WCDMA) technology, the mobile user objective system (MUOS) provides a wide range of wireless telecommunications services to the war fighter over geosynchronous satellites. As MUOS is a multiple beam system, it is of paramount importance for the user entry (UE) to select the best beam, which in turn requires...
Management of the devices in a Wideband SATCOM enterprise Earth terminal facility (ETF) is currently fragmented among multiple systems, and some of these legacy systems provide only limited functionality. This paper describes the architecture of a consolidated system to manage the elements of an ETF. Such a system can offer a number of benefits. First, the ETF management system can provide a consolidated,...
Future satellite-based packet networks (FSPN) will utilize a request/grant MAC protocol referred to as demand assigned multiple access (DAMA) for uplink allocations. DAMA is conceptually similar to bandwidth-on-demand (BoD) protocols used in terrestrial networks, such as 802.16 and DOCSIS, which flexibly share total bandwidth according to actual loads and usage policies. However, unique characteristics...
Demand Assigned Multiple Access (DAMA) is a technology used to assign link capacity based on user demand. The allocation of capacity is limited by a set of constraints (e.g., priority of the traffic, link condition, RF interference, required bandwidth). Capacity is allocated in the time and frequency domains. An allocation algorithm determines per-user capacity for each assignment epoch. A packing...
In this paper, we discuss a general multi protocol label switching (MPLS) based traffic engineering (TE) approach for providing QoS based transportation in a geostationary satellite constellation network. As satellite constellation networks become more and more common, with on-board packet processing capabilities providing backbone services to support thousands of airborne and terrestrial terminals,...
In this paper, we investigate the packet transmission delay in a time varying satellite uplink. Specifically, we are interested in bounding the packet transmission delay within the terminal router for uplink traffic in a future satellite network. Previous work has provided delay bounds for wireline networks with a fixed transmission rate. However, these bounds do not apply to the time-varying satellite...
With the phenomenal success and productivity of terrestrial networks, there is interest in using similar technology in space. For instance, there currently are projects aimed at deploying Internet routers in space. In this paper, we discuss the general concept of connecting a cluster of satellites with a local area network. We discuss the advantages and challenges of such a network, as well as possible...
The Mobile User Objective System (MUOS) is largely based on 3rd Generation Partnership Project (3GPP) standards, however, these standards are intended for terrestrial mobile communications networks. As a result of incorporating geosynchronous satellites into the design (e.g., extended propagation delays, power, cell size), modifications to the 3GPP procedures, such as moving control of cell selection,...
This paper presents an analysis of satellite communications (SATCOM) systems that use Internet protocol (IP) with quality of service (QoS) metrics, and addresses IP efficiency measures. Key contributing elements for the IP efficiency are network structure, provisional efficiency, and bandwidth-on-demand features. IP bandwidth gains will also depend on the network size, the level of hierarchy, and...
We introduce complete analytical characterization of the nonlinear interference that results when passing more than one high-order modulation carrier through the same nonlinear transponder HPA. Based on this analysis, a novel Volterra filter is proposed that models nonlinear intersymbol interference (ISI) and adjacent channel interference (ACI). Our focus is on adaptive algorithms so that the solutions...
The army is increasingly reliant on beyond line of sight (BLOS) communications due to a non-contiguous battlefield. The war fighter also requires mobility and network connectivity to provide the needed level of near real-time, tactically-relevant information. On-the-move (OTM) space based communications forms a critical layer in supporting these essential networking capabilities. There are a significant...
With the increasing size and complexity of emerging military communication networks, low footprint emulation methods are required to evaluate protocols, algorithms and user performance. In this paper we describe a new emulation architecture that is scalable, modular, and responds to real-time changes in topology and link characteristics. We use this scalable emulation testbed to evaluate system performance...
This paper proposes a statistical approach to off-axis EIRP masks, in order to accommodate satellite communications on the move (SOTM) terminals. A ??statistical mask?? provides a reference EIRP Spectral Density (ESD) limitation, which can be exceeded with a specified maximum probability. Statistical masks and their implementation approaches are discussed in detail. Simulations are provided to show...
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