RAMCAST: Reliable and Adaptive Multicast over IEEE 802.11n WLANs

Park, Young Deok; Jeon, Seokseong; Kim, Kyungjun; Suh, Young-Joo

doi:10.1109/lcomm.2016.2566642

Cited by 10 publications

(7 citation statements)

References 8 publications

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“…This is because we limited the number of the channel by an attenuation factor &. The figure also shows that as the number of channels increases, the average PSNR obtained FIGURE 6 Average PSNR of all multicast users for BPSO, ESA and Greedy…”

Section: Evaluation Of the Proposed Bpso Algorithmmentioning

confidence: 94%

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Cognitive radio based efficient video multicast in TV white space

Liu

Fei

et al. 2021

IET Communications

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The wireless video multicast in TV White Space (TVWS) is a challenging task due to the characteristics of the wireless channels and the video streaming. This paper studies the optimized real-time video multicast in TVWS, and proposes a practical and bandwidth-efficient TVWS video multicast framework. First, a TVWS-based efficient quasi-static spectrum access scheme is employed to reduce the spectrum switch delay. Second, a cross-layer optimized resource scheduling scheme is proposed to further improve the multicast performance, which considers various cross-layer design factors, including scalable video coding, adaptive modulation-coding, to maximize the overall received video quality. Finally, the proposed resource scheduling problem is formulated as a mixed-integer non-linear programming problem. Considering that the video streaming is delay-sensitive, the problem is addressed with a proposed sub-optimal but computational efficient algorithm. The simulation results demonstrate the effectiveness and superiority of the proposed scheme.

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Section: Evaluation Of the Proposed Bpso Algorithmmentioning

confidence: 94%

“…Wireless video multicasting is also a hot topic currently and many schemes have been proposed for it, for example, Ad-Hoc based video multicast scheme [4], 4G based video multicast scheme [5], Wi-Fi-based video multicast scheme [6][7][8]. However, TVWS based video multicast is rarely mentioned.…”

Section: Related Workmentioning

confidence: 99%

Cognitive radio based efficient video multicast in TV white space

Liu

Fei

et al. 2021

IET Communications

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“…Those unary signals are used as NACK messages and for a receiver-side rate selection mechanism. In contrast, RAMCAST [11] and FlexVi [12] use such unary signals as a collision resistant NACK mechanism, where the dedicated OFDM subcarriers are used for a bitmap representing individual packets of a block.…”

Section: A Mac Layer Multicast Reliabilitymentioning

confidence: 99%

Joint Link Rate Selection and Adaptive Forward Error Correction for High-Rate Wireless Multicast

Geithner

Sivrikaya²,

Albayrak

2022

IEEE Open J. Commun. Soc.

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Multicast communication over wireless networks has many potential applications, such as real-time audiovisual content distribution or digital signage systems with multiple remote terminals. However, today's common 802.11 networks cannot fully support such applications at the link layer due to the technical challenges in achieving both high transmission rate and high reliability for multicast data transfers. Those challenges primarily emerge from the inapplicability of immediate acknowledgment mechanisms of unicast transmissions to the multicast case and the need for finding a common transmission rate for all receivers with diverse channel conditions. The research literature in this domain mainly addresses the problem at the higher layers of the protocol stack. In this article, we present a novel approach that combines wireless link rate selection with an adaptive packet-level Forward Error Correction (FEC) mechanism in order to achieve high-rate and highly reliable multicast in 802.11 wireless networks. The integration of FEC into the 802.11 MAC layer allows direct interaction between the transmission rate and the coding scheme. As a result, potential packet losses caused by higher link rates can be compensated by the adjustable redundancy provided by FEC. In combination with an aggregated receiver feedback mechanism, this yields improved transmission efficiency and reliability for wireless multicast. We investigate this approach in a simulation environment under a realistic wireless channel model in various application scenarios with up to 50 receivers. The results represent significant performance improvements, in terms of throughput, channel utilization, and packet loss, over the state-of-the-art methods for reliable wireless multicast.

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“…Proof:. We claim, without loss of generality for the proof [15], that Λ C ={u 1 , u 2 ,…,u n }\{u i , u j }, where u j is the attacked user. The set of non-corrupted nodes must contain two or more elements because if there is only one, u j , then it is very easy to compute = Since that function accomplishes all the Chinese Remainder Theorem's requirements, then Encryptj is an injective function and also bijective in Rang(Encryptj).…”

Section: Securitymentioning

confidence: 99%

“…Hence, sending a smaller number of frames (a single frame for a number of users instead of a number of unicast Protocol Data Unit, that sends a number of MPDUs together, and A-MSDU (Aggregated Media Access Control Service Data Unit), that makes the same at MSDU level [3]. The use of these aggregation mechanisms for sending multicast frames has been proposed in the literature [15,16].…”

Section: Channel Utilization Efficiencymentioning

confidence: 99%

Short Message Multichannel Broadcast Encryption

Salazar

Saldaña

Fernández-Navajas

et al. 2020

13th International Conference on Computational Intelligence in Security for Information Systems (CISIS 2020)

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The current use of short messages in wireless networks is highly growing. Messaging applications in mobile terminals with wireless coverage are very common in shopping, educational and transport centers, i.e. in centers of massive influx of people. This requires improving its efficiency, without losing security in such a hostile environment. In this paper, we propose an improvement in the use of the medium through a new multichannel broadcast encryption paradigm. Firstly, we rigorously demonstrate the security of our model that is characterized by two main issues: short messages and maintaining privacy in a shared frame. The improvements are obtained by reducing the transmitted overheads, saving bandwidth and airtime. To implement them, we improve the efficiency of communications, reducing the security headers to a single one, which will be shared by all receivers, while the payload is multiplexed via Chinese Remainder Theorem. In this way we reduce the packet length (less headers) and set the ratio of the encrypted text/plaintext equals to one, if we do not take into account padding and security headers. Although the model can be used by all types of networks, both wired and wireless, the improvement is more noticeable in the latter type. To make it remarkable, we quantify what this gain will consist of.

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RAMCAST: Reliable and Adaptive Multicast over IEEE 802.11n WLANs

Cited by 10 publications

References 8 publications

Cognitive radio based efficient video multicast in TV white space

Cognitive radio based efficient video multicast in TV white space

Joint Link Rate Selection and Adaptive Forward Error Correction for High-Rate Wireless Multicast

Short Message Multichannel Broadcast Encryption

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