M-HELP - Multi-Hop Emergency Call Protocol in 5G

Basnayake, Vishaka; Mabed, Hakim; Jayakody, Dushantha Nalin K.; Canalda, Philippe

doi:10.1109/nca51143.2020.9306713

Cited by 4 publications

(8 citation statements)

References 11 publications

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“…Note that for outband D2D emergency scenarios, user signal retransmissions are necessary in order not to lose any critical data [42]. In addition, it is assumed that the network users follow a D2D protocol such as M-HELP [43], which is used for D2D emergency call transmissions. A M-HELP enabled UE re-transmits their own Update λ (m) , δ (m) , φ (m) , δ (m) as in ( 16), ( 17), ( 18), ( 23)…”

Section: ) Decoding and Re-transmission Stagesmentioning

confidence: 99%

M-Ary QAM Asynchronous-NOMA D2D Network With Cyclic Triangular-SIC Decoding Scheme

et al. 2023

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The complexity of successive interference cancellation at the receiver's end is a challenging issue in conventional non-orthogonal multiple access assisted massive wireless networks. The computational complexity of decoding increases exponentially with the number of users. Further, under realistic channel conditions, a synchronous non-orthogonal multiple access scheme is impractical in the uplink deviceto-device communications. In this paper, an asynchronous non-orthogonal multiple access-based cyclic triangular successive interference cancellation scheme is proposed for a massive device-to-device network. The proposed scheme reduces the decoding complexity, energy consumption, and bit error rate of a superimposed signal received in an outband device-to-device network. More specifically, the scheme follows three consecutive stages; optimization, decoding, and re-transmission. In the optimization stage, a dual Lagrangian objective function is defined to maximize the number of data symbols decoded at the receiver by determining an optimal interference cancellation triangle, under the co-channel interference and data rate constraints. In the decoding stage, the data in the optimal interference cancellation triangle is decoded using a conventional triangular successive interference cancellation technique. Next, the remaining users' data are decoded in sequential iterations of the proposed scheme, using the retransmissions from such users. Utilizing the successive interference cancellation characteristics, the performance of the proposed deviceto-device network is defined in terms of energy efficiency, bit error rate, computational complexity, and decoding delay metrics. Moreover, the performance of the proposed decoding scheme is compared with the conventional triangular successive interference cancellation decoding scheme to demonstrate the superiority of the proposed scheme.

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Section: ) Decoding and Re-transmission Stagesmentioning

confidence: 99%

M-Ary QAM Asynchronous-NOMA D2D Network With Cyclic Triangular-SIC Decoding Scheme

et al. 2023

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“…On top of that, M-HELP [9] is another resilient protocol designed to address large disaster scenarios using D2D. M-HELP adds zero additional control messages to the network.…”

Section: Wireless Network Recoverymentioning

confidence: 99%

“…The behavior of existing protocols such as M-HELP [9] depends on constant parameters mainly used by the UEs to decide either to relay or not, the received emergency calls. In contrast, 5G-SOS parameters are designed in the proceeding sections, which can vary adaptively according to the observed network measurements.…”

Section: G-sos Adaptive Parametersmentioning

confidence: 99%

“…To prevent a very long waiting time, a maximum waiting time T max is introduced. In M-HELP [9], the waiting time is computed as (3):…”

Section: Waiting Time For Relaying T Rmentioning

confidence: 99%

“…The performance of the proposed adaptive protocol is shown to be significant when compared with competitive existing protocols such as M-HELP [9] and FINDER [10] in terms of transmission success rate, network traffic control, and energy management under extreme emergency scenarios.…”

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confidence: 99%

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Adaptive Emergency Call Service for Disaster Management

Basnayake

Mabed

Jayakody

et al. 2022

JSAN

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Reliable and efficient transmission of emergency calls during a massive network failure is both an indispensable and challenging task. In this paper, we propose a novel fully 3GPP and 5G compatible emergency call protocol named 5G StandalOne Service (5G-SOS). A 5G-SOS-enabled emergency service provides potential out-of-coverage victims’ devices with a way to contact the 4G/5G core network through D2D multi-hop relaying protocol. The objective of 5G-SOS is to maintain this connection even when a large fraction of the network infrastructure is destroyed. 5G-SOS is a fully distributed protocol designed to generate zero additional control traffic and to adapt its parameters based on the local emergency call congestion. Therefore, devices behave as an ad-hoc network with the common purpose to ensure the best chances for emergency call transfer within a reasonable delay. A densely populated Traverse city of Michigan, USA, with a 15,000 population, is used to evaluate 5G-SOS under extreme emergency scenarios. The performance of 5G-SOS is shown to be significant when compared with existing protocols, namely, M-HELP and FINDER, in terms of transmission success rate, end-to-end latency, network traffic control, and energy management. 5G-SOS provides satisfactory performance (success rate of 50%) even when the number of simultaneous emergency calls is very high (5000 calls over 10 min). On average, 5G-SOS performs 24.9% better than M-HELP and 73.9% than FINDER in terms of success rate. Additionally, 5G-SOS reduces the average end-end latency of the emergency calls transfer by 20.8% compared to M-HELP and 61.7% compared to FINDER.

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