4G system for internet access in coastal areas

Transcription

1 4G system for internet access in coastal areas System Presentation The purpose of NeptuLink by MVG is to satisfy the broadband IP communication needs of users on board ships and various vessels in coastal areas (fishing boats, yachts, research vessels, wind farms, coast guard & sea rescue vessels, etc.) as well as in port areas (video transmission for crane operators, etc.). i Do you know? Current solutions (HF, VHF) are either limited in terms of bandwidth (~10 kbits/s) or expensive (satellite communications). NeptuLink by MVG allows high speed connectivity to 4G networks at the same cost of mobile phone data access. NeptuLink by MVG system perspective view

2 The NeptuLink by MVG terminals connect to LTE networks (frequency bands 1, 3, 7, 8 and 20), thus allowing communications at over 10 Mbps for distances over 10 nautical miles. If the terminal is not in an area with LTE coverage, it is able to fall back on less advanced technology (UMTS and then GSM) to stay connected. The system lets you connect a PC transparently via its Ethernet connection so that it can directly access a high-bandwidth IP network. The same Ethernet connection can also be connected directly to a Wi-Fi router, which will provide access to a wireless broadband network for everyone on board. Ethernet Wifi Router IP Network These terminals were developed to be suited to the marine environment (mechanically resilient, resistant to humidity, salt spray, etc.). They also take into account the highly specific characteristics of wave propagation above sea level. Indeed, the combination of the signals, arriving directly from the base station, and in the form of a reflected signal from the surface of water, can result in signal fading at the terminal end and ultimately a loss of communication can occur. To avoid this fading phenomenon, two vertically polarized antennas are placed at the terminal end. The vertical distance between these antennas is chosen intelligently in order to minimize the signal fading over the whole frequency band. Power received by the terminal (dbm) Without vertical space diversity Power received by the terminal (dbm) With vertical space diversity Terminal base station distance (m) Terminal base station distance (m) Ethernet Wifi Router IP Network Lastly, depending on sea conditions, the vessel may be subject to pitching and rolling motions. In order to maintain optimal communication, regardless of the movement of the boat on which the system is installed, the antenna radiation pattern needed to be optimized. To enable a connection, whatever the relative position of the boat and the base station, the antennas are omnidirectional in the azimuthal plane. The opening angle of the radiation pattern in the elevation plane, on the other hand, must be as small as possible to optimize the link budget, but still large enough to maintain the connection despite the pitching and rolling motions of the boat.

3 Test campaigns conducted The NeptuLink by MVG terminals were tested over three test campaigns at sea. The first two campaigns were conducted in June and December 2013 using the Images & Réseaux hub s ImaginLab LTE experimentation platform ( Using the same network, an LTE connectivity demonstration was also given for the DIRISI and the Chief of Staff of the French Navy in November Carried out by Images et Réseaux and Crystal SC, this demonstration, which implemented the LTE terminals developed by MVG installed on a French Navy tugboat ( showed sustained LTE connectivity for more than 20 nautical miles and uplink and downlink throughput at 10 nautical miles much higher than that currently accessible using a conventional terrestrial ADSL line. These tests have since been supplemented with a final campaign at sea conducted in July 2014 in the Bay of Brest using the Orange commercial network. 1/ Test campaign conducted in 2013 using the ImaginLab experimentation network Two test campaigns were conducted in June and December 2013 using the ImaginLab LTE experimentation network located in Brest. For these tests, a single base station located at the IFREMER Brest site was kept in constant communication on the network in order to avoid successive handovers which would have complicated data analysis. The base station antenna was positioned along a 220 axis, which matched our course, and at a height of approximately 50 meters above sea level. The main results of this campaign are summarized in the following figures: Journey made between Brest and the Île de Sein, and distance from the base station in nautical miles Uplink throughput measured (Mbps) based on the distance from the base station (km) RSRP (dbm) based on the distance from the base station (km)

4 RSRP (dbm) < to to to to to -110 < -120 Rx received by the telephone: Less than -105 dbm Between -105 and -95 dbm Between -95 and -85 dbm Between -85 and -75 dbm Greater than -75 dbm No reception Base station RSRP UL Throughput (Mbps) < to 15 8 to 10 6 to 8 4 to 6 2 to to 2 < 0.5 Measurements taken under the same conditions using a 4G Android tablet The measurements taken in parallel with the NeptuLink by MVG system and a 4G Android tablet clearly show the advantage of the proposed system the reach, the received power levels and, as a result, the accessible throughput are significantly higher. We were able to measure differences of around 30 db in received power on the different terminals (NeptuLink by MVG on the one hand and the 4G Android tablet on the other). Uplink throughput 2/ Test campaign conducted in 2014 using the Orange commercial network In July 2014, to supplement our initial tests, we conducted a measurement campaign using the Orange network in the Bay of Brest. The main results obtained during this campaign are summarized in the following figures: Cell ID Measurements from 07/15/2014 Cell ID Measurements from 07/15/2014 to 07/18/2014 In particular, these measurements demonstrate efficient handover and repeatability. Among the set of Orange LTE 2600 base stations, our systems were mainly connected to six of them.

5 RSRP Measurements from 07/15/2014 RSRP Measurements from 07/15/2014 to 07/18/2014 The RSRP levels measured during this campaign were between -70 dbm and -100 dbm. Uplink and downlink throughput The throughput measured during this campaign varied between 10.7 Mbps and 1.2 Mbps for the uplink, and between 16.5 Mbps and 2.4 Mbps for the downlink. Contact your local sales representative for more information MVG Graphic design: pictures: Taiga - Dmitriy Rumyantsev - Bokica - Fotolia.com, all rights reserved. Product specifications and descriptions in this document are subject to change without notice. Actual products may differ in appearance from images shown.