Irregular repetition slotted ALOHA with multiuser detection

Ghanbarinejad, Majid; Schlegel, Christian

doi:10.1109/wons.2013.6578348

Cited by 63 publications

(51 citation statements)

References 9 publications

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“…The proposed scheme would allow either to increase the throughput for a given frame size or to reduce the frame size while guaranteeing the same throughput. Similar considerations have been presented in the work of Ghanbarinejad and Schlegel, where MUD is applied to IRSA. To be able to show the gain deriving from applying S&D on top of IRSA, we compare the throughput and PLR curves of the two schemes for the case of a frame with 200 slots and Rayleigh fading channels with average SNR 15 dB.…”

Section: Numerical Resultsmentioning

confidence: 63%

Seek and decode: Random access with physical‐layer network coding and multiuser detection

Cocco

Pfletschinger

Navarro

2016

Trans. Emerging Tel. Tech.

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We present a novel cross layer approach to random access (RA) that combines physical-layer network coding (PLNC) with multiuser detection (MUD). PLNC and MUD are applied jointly at the physical level in order to extract any linear combination of messages experiencing a collision. The set of combinations extracted from a whole frame is then processed by the receiver to recover the original packets. A simple pre-coding stage at the transmitting terminals allows the receiver to further increase system diversity. We derive an analytical bound on the system throughput and present simulation results for the decoding at the physical level as well as several performance measures at frame level in block fading channels, namely throughput, packet loss rate and energy efficiency. The results we present are promising and suggest that a cross layer approach leveraging on the joint use of PLNC and MUD can significantly improve the performance of RA systems.

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Section: Numerical Resultsmentioning

confidence: 63%

Seek and decode: Random access with physical‐layer network coding and multiuser detection

Cocco

Pfletschinger

Navarro

2016

Trans. Emerging Tel. Tech.

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“…Secondly, stability analysis for the proposed scheme is an important issue in practical applications. Finally, further improvement can be achieved by incorporating more sophisticated encoding and detection techniques [13].…”

Section: Discussionmentioning

confidence: 99%

Coded Random Access with Distributed Power Control and Multiple-Packet Reception

Zhang

Ping

2015

IEEE Wireless Commun. Lett.

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In this letter, a spatially-coupled low-density paritycheck (SC-LDPC) coded ALOHA system with multiuser detection (MUD)-based multiple packet reception (MPR) is studied. A distributed power control scheme based on multiple power levels is proposed for medium and high rate applications. Numerical results show that the proposed scheme can provide noticeable throughput improvement. This improvement is more significant in the cases of fading channels.

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“…Packet success rate in [7]- [9] is improved for a contentionbased access in slotted ALOHA. The schemes consider repetition coding where the packet is transmitted multiple times to improve the success rate.…”

Section: Introductionmentioning

confidence: 99%

“…Further, [7], [9] considered successive interference cancellation or iterative collision resolution where some of the collided packets are recovered by subtracting the packet replicas from the others. In [7], [9], the latency is increased for the collided packet resolution where significant waiting period is consumed in the reception of other UE's packet replica and the following interference cancellation. Complexity is also increased related to enabling packet recovery process, e.g, storing of packet replicas and collision information.…”

Section: Introductionmentioning

confidence: 99%

“…Further, the packet replicas are required to be equipped with pointers to the slots containing them, or embed with UE-specific identification which is known by the network in advance. The schemes in [7], [9] improve the packet success rate, but latency is increased. Accordingly, they are not suitable from the perspective of 5G URLLC services.…”

Section: Introductionmentioning

confidence: 99%

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Contention-Based Access for Ultra-Reliable Low Latency Uplink Transmissions

Singh

Tirkkonen

et al. 2018

IEEE Wireless Commun. Lett.

133

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Abstract-We consider sporadic ultra-reliable and low latency communications in the uplink 5G cellular systems. Reliable low latency access for randomly emerging packet transmission needs cannot be guaranteed in current wireless systems. To achieve the goal of low latency and high reliability simultaneously, we propose a contention-based transmission scheme aimed for the users with small payloads. We target to reduce collision probability by considering multiple transmissions for the same packet for reliable reception. We find the optimal number of consecutive multiple transmissions that reduces collisions and achieves target reliability within the latency window. By means of intended frame structure design for the 5G cellular systems, results are drawn and comparisons are made with default multi-channel slotted ALOHA access scheme.

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Irregular repetition slotted ALOHA with multiuser detection

Cited by 63 publications

References 9 publications

Seek and decode: Random access with physical‐layer network coding and multiuser detection

Seek and decode: Random access with physical‐layer network coding and multiuser detection

Coded Random Access with Distributed Power Control and Multiple-Packet Reception

Contention-Based Access for Ultra-Reliable Low Latency Uplink Transmissions

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