Novel spectral efficient cooperative relaying protocols with low communication overhead

2011 ◽  
Vol 5 (14) ◽  
pp. 2009-2017 ◽  
Author(s):  
A.A. Haghighi ◽  
K. Navaie
Keyword(s):  
Cooperative Relaying ◽  
Communication Overhead ◽  
Relaying Protocols

Diversity Combining for Cooperative Communications

2010 ◽  
pp. 301-320
Author(s):  
Diomidis S. Michalopoulos ◽  
George K. Karagiannidis
Keyword(s):  
Performance Analysis ◽  
Antenna Arrays ◽  
Cooperative Communications ◽  
Cooperative Relaying ◽  
Diversity Combining ◽  
Practical Applications ◽  
Relaying Protocols ◽  
Diversity Receiver ◽  
Combining Methods ◽  
Switch And Stay Combining

A major advantage of cooperative communications is the potential for forming distributed antenna arrays, that is arrays whose elements are not collocated, but carried by independent relaying terminals. This allows for a study and design of cooperative communications under a novel perspective, where the inherent end-to-end paths between the source and destination terminal constitute the multiple branches of a virtual, distributed diversity receiver. As a result, the well-known combining methods used in conventional diversity receivers can be implemented in a distributed fashion, resulting in novel relaying protocols and, generally, in new ways for exploiting the resources available in cooperative relaying setups. This chapter provides an overview of this distributed diversity concept, as well as a performance analysis of the corresponding distributed diversity schemes, with particular emphasis on the analysis of distributed switch-and-stay combining. Further insights regarding the potential of implementing the distributed diversity concept in practical applications are obtained.

On the performance of cooperative relaying protocols in wireless networks

2005 ◽  
Vol 16 (1) ◽  
pp. 5-16 ◽  
Author(s):  
Ernesto Zimmermann ◽  
Patrick Herhold ◽  
Gerhard Fettweis
Keyword(s):  
Wireless Networks ◽  
Cooperative Relaying ◽  
Relaying Protocols

An Efficient Cluster-Based Flooding Using Fuzzy Logic Scheme (CBF2S) In Mobile Adhoc Networks

2020 ◽  
Vol 14 ◽  
Author(s):  
S. Mahima ◽  
N. Rajendran
Keyword(s):  
Fuzzy Logic ◽  
Ad Hoc ◽  
Link Quality ◽  
Traffic Load ◽  
Node Degree ◽  
Communication Overhead ◽  
Delivery Ratio ◽  
Node Mobility ◽  
Centralized Control ◽  
Hop Count

: Mobile ad hoc networks (MANET) hold a set of numerous mobile computing devices useful for communication with one another with no centralized control. Due to the inherent features of MANET such as dynamic topology, constrained on bandwidth, energy and computing resources, there is a need to design the routing protocols efficiently. Flooding is a directive for managing traffic since it makes use of only chosen nodes for transmitting data from one node to another. This paper intends to develop a new Cluster-Based Flooding using Fuzzy Logic Scheme (CBF2S). To construct clusters and choose proper cluster heads (CHs), thefuzzy logic approach is applied with the use of three parameters namely link quality, node mobility and node degree. The presented model considerably minimizes the number of retransmissions in the network. The presented model instructs the cluster members (CM) floods the packets inside a cluster called intra-cluster flooding and CHs floods the packets among the clusters called inter-cluster flooding. In addition, the gateway sends a packet to another gateway for minimizing unwanted data retransmissions when it comes under different CH. The presented CBF2S is simulated using NS2 tool under the presence of varying hop count. The CBF2S model exhibits maximum results over the other methods interms of overhead, communication overhead, traffic load, packet delivery ratio and the end to end delay.

scholarly journals On the Cooperative Relaying Strategies for Multi-Core Wireless Network-on-Chip

IEEE Access ◽  
2021 ◽  
pp. 1-1
Author(s):  
Quoc-Tuan Vien ◽  
Michael Opoku Agyeman ◽  
Mallik Tatipamula ◽  
Huan X. Nguyen
Keyword(s):  
Wireless Network ◽  
Network On Chip ◽  
Cooperative Relaying ◽  
On Chip ◽  
Relaying Strategies

scholarly journals MedShard: Electronic Health Record Sharing Using Blockchain Sharding

2021 ◽  
Vol 13 (11) ◽  
pp. 5889
Author(s):  
Faiza Hashim ◽  
Khaled Shuaib ◽  
Farag Sallabi
Keyword(s):  
Healthcare System ◽  
Small Groups ◽  
Network Performance ◽  
Communication Overhead ◽  
Privacy And Security ◽  
Health Records ◽  
Medical Practitioners ◽  
Blockchain Technology ◽  
Simulation Results ◽  
Electronic Health

Electronic health records (EHRs) are important assets of the healthcare system and should be shared among medical practitioners to improve the accuracy and efficiency of diagnosis. Blockchain technology has been investigated and adopted in healthcare as a solution for EHR sharing while preserving privacy and security. Blockchain can revolutionize the healthcare system by providing a decentralized, distributed, immutable, and secure architecture. However, scalability has always been a bottleneck in blockchain networks due to the consensus mechanism and ledger replication to all network participants. Sharding helps address this issue by artificially partitioning the network into small groups termed shards and processing transactions parallelly while running consensus within each shard with a subset of blockchain nodes. Although this technique helps resolve issues related to scalability, cross-shard communication overhead can degrade network performance. This study proposes a transaction-based sharding technique wherein shards are formed on the basis of a patient’s previously visited health entities. Simulation results show that the proposed technique outperforms standard-based healthcare blockchain techniques in terms of the number of appointments processed, consensus latency, and throughput. The proposed technique eliminates cross-shard communication by forming complete shards based on “the need to participate” nodes per patient.

Sign in / Sign up

Export Citation Format

Share Document