المؤلفون: David Garcia-Roger, Panagiotis Spapis, Jose F. Monserrat, Alexandros Kaloxylos, David Martin-Sacristan, Chan Zhou, Sandra Roger

المصدر: IEEE Transactions on Intelligent Transportation Systems. 22:1052-1067

مصطلحات موضوعية: Mobile edge computing, business.industry, Computer science, Mechanical Engineering, Core network, Computer Science Applications, Broadcasting (networking), Handover, Server, Automotive Engineering, Cellular network, Latency (engineering), business, Computer network

الوصف: Mobile network operators are interested in providing Vehicle-to-Vehicle (V2V) communication services using their cellular infrastructure. Regional split of operators is one possible approach to support multi-operator infrastructure-based cellular V2V communication. In this approach, a geographical area is divided into non-overlapping regions, each one served by a unique operator. Its main drawback is the communication interruption motivated by the inter-operator handover in border areas, which prevents the fulfillment of the maximum end-to-end (E2E) latency requirements of fifth generation (5G) V2V services related to autonomous driving. In this work, we enable a fast inter-operator handover based on the pre-registration of the users on multiple operators, which substantially reduces the handover time to guarantee maximum E2E latency values of 100 ms in non-congested scenarios. To further reduce the latency of time-critical services to always less than 70 ms, even with the handover interruption time, while providing a latency around 20 ms in the majority of locations, we propose to complement the former technique with a mobile edge computing approach. Our proposal consists in the localization of application servers and broadcasting entities in all the base stations, to avoid the communication through the core network, together with the use of a new set of nodes in the base stations of cross-border areas called inter-operator relays, to minimize the communication latency between operators. Based on analytic and simulation results, it is demonstrated that the proposed techniques are effective to support low-latency infrastructure-based cellular V2V communications in multi-operator environments with regional split.

URL الوصول: https://explore.openaire.eu/search/publication?articleId=doi_________::4940098be3bfb135f10a24f3e85effd1
https://doi.org/10.1109/tits.2019.2962097

المؤلفون: David Garcia-Roger, David Martin-Sacristan, Alexandros Kaloxvlos, Chan Zhou, Sandra Roger, Jose F. Monserrat, Panagiotis Spapis

المصدر: BMSB

مصطلحات موضوعية: 050210 logistics & transportation, Multi operator, Computer science, business.industry, 05 social sciences, 020206 networking & telecommunications, 02 engineering and technology, Reduction (complexity), Operator (computer programming), Handover, Logic gate, Server, 0502 economics and business, 0202 electrical engineering, electronic engineering, information engineering, Radio frequency, Latency (engineering), business, Computer network

الوصف: Regional splitting of operators is one possible approach to support multi-operator cellular V2V communication. In this approach, a geographical area is divided into nonoverlapping regions served by a unique operator. Although the regional splitting makes most of the communications among devices intra-operator, some inter-operator communications are still required in border areas. This kind of communication involves a high delay that may not be valid for the distribution of time-critical messages such as brake-after-crash messages. This paper focuses on latency reduction of inter-operator communications for the delivery of time-critical messages in multi-operator environments with regional splitting. In order to not increase the device cost, we propose a solution based on a forced inter-operator handover that is valid for devices with only one Radio Frequency (RF) unit. Analytical results demonstrate the usefulness of our proposal to reduce the latency of time-critical messages, while simulation results prove that non-time-critical messages are not affected by our proposal.

URL الوصول: https://explore.openaire.eu/search/publication?articleId=doi_________::625b055d18a6c73ac46007b5963f13df
https://doi.org/10.1109/bmsb.2018.8436928

المؤلفون: David Martin-Sacristan, Sandra Roger, David Garcia-Roger, Jose F. Monserratt, Panagiotis Spapis, Apostolos Kousaridas, Chan Zhou

المصدر: BMSB

مصطلحات موضوعية: business.industry, Computer science, 05 social sciences, 050801 communication & media studies, 020206 networking & telecommunications, 02 engineering and technology, Multimedia Broadcast Multicast Service, Base station, 0508 media and communications, Logic gate, Server, 0202 electrical engineering, electronic engineering, information engineering, Traffic load, Cooperative awareness, Latency (engineering), business, 5G, Computer network

الوصف: The LTE Multimedia Broadcast Multicast Service (MBMS) has been proven valid to support classical Vehicle-to-Anything (V2X) services such as the delivery of Cooperative Awareness Message (CAM) and Decentralized Environmental Notification Message (DENM). However, with its current specification, MBMS cannot guarantee the challenging latency and reliability requirements imposed by 5G V2X services. To decrease the communication latency, we study a solution based on the location of V2X servers and MBMS functionalities in the base stations. Several signaling mechanisms used to coordinate V2X servers of neighbor base stations in this solution are presented and analyzed in this work. The analysis shows that a periodical sharing of location information between neighbor servers can be the best option to reduce the traffic load between servers. Concerning the end - to-end latency, analytical and simulation results, based on the use of Single-Cell Point-to-Multipoint (SC-PTM) transmission, show that the localization of functions can substantially reduce the latency of conventional MBMS and ensure the correct operation of more demanding 5G V2X services, such as cooperative collision avoidance.

URL الوصول: https://explore.openaire.eu/search/publication?articleId=doi_________::5ca08743409f5c4887da9fdebdcc5a12
https://doi.org/10.1109/bmsb.2018.8436758

المؤلفون: Jose F. Monserrat, Serkan Ayaz, Sandra Roger, Chan Zhou, Apostolos Kousaridas, David Garcia-Roger, Panagiotis Spapis, David Martin-Sacristan

المصدر: WCNC

مصطلحات موضوعية: Multicast, business.industry, Computer science, ComputerSystemsOrganization_COMPUTER-COMMUNICATIONNETWORKS, 020206 networking & telecommunications, 020302 automobile design & engineering, Provisioning, 02 engineering and technology, LTE Advanced, 0203 mechanical engineering, Server, Telecommunications link, 0202 electrical engineering, electronic engineering, information engineering, Unicast, business, Intelligent transportation system, Computer network

الوصف: In order to shed some useful light on the design of multi-connectivity (MC) solutions for vehicular-to anything (V2X) communications, this work evaluates the performance of different connectivity alternatives based on LTE-Advanced for the support of key intelligent transportation systems (ITS) services as CAM, DENM and platooning in a realistic highway scenario. In particular, downlink unicast, downlink multicast based on Single-Cell Point-to-Multipoint (SC-PTM), and V2X sidelink connectivity modes have been benchmarked for each ITS service separately. Results show that V2X sidelink transmission exhibits excellent performance for all the services when its subchannelization is properly configured. Downlink multicast is a valid option for DENM and CAM although the optimum modulation and coding scheme (MCS) is different for each service. Finally, unicast is unable to provide a successful performance for CAM while it is valid for platooning and DENM.

URL الوصول: https://explore.openaire.eu/search/publication?articleId=doi_________::a9b2a4a3c859ab850104b85bdec996e4
https://doi.org/10.1109/wcnc.2018.8377183