scholarly journals Time-Slot Allocation in Dynamic Time Division Duplexing System using Non-Orthogonal Multiple Access

2021 ◽  
Vol 22 (8) ◽  
pp. 32-39
Author(s):  
Hyeon-seong Kim ◽  
Ho-Shin Cho
Keyword(s):  
Multiple Access ◽  
Time Slot ◽  
Slot Allocation ◽  
Time Slot Allocation ◽  
Dynamic Time ◽  
Time Division ◽  
Time Division Duplexing

A Dynamic Time Slot Allocation Scheme for Hybrid CSMA/TDMA MAC Protocol

2013 ◽  
Vol 2 (5) ◽  
pp. 535-538 ◽  
Author(s):  
Bharat Shrestha ◽  
Kae Won Choi ◽  
Ekram Hossain
Keyword(s):  
Time Slot ◽  
Mac Protocol ◽  
Allocation Scheme ◽  
Slot Allocation ◽  
Time Slot Allocation ◽  
Dynamic Time ◽  
Tdma Mac

Traffic prediction-based dynamic time slot allocation TDMA protocol

2015 ◽  
Author(s):  
Shao-cheng Huang ◽  
Lin-hua Ma ◽  
Le Ru ◽  
Zhao Cai ◽  
Song Zhang ◽  
...  
Keyword(s):  
Time Slot ◽  
Traffic Prediction ◽  
Slot Allocation ◽  
Time Slot Allocation ◽  
Dynamic Time

scholarly journals Fuzzy-Based Dynamic Time Slot Allocation for Wireless Body Area Networks

Sensors ◽  
2019 ◽  
Vol 19 (9) ◽  
pp. 2112 ◽  
Author(s):  
Sangeetha Pushpan ◽  
Bhanumathi Velusamy
Keyword(s):  
Real Time ◽  
Energy Efficient ◽  
Patient Monitoring ◽  
Time Slot ◽  
Body Area Networks ◽  
Wireless Body Area Networks ◽  
Slot Allocation ◽  
Body Area ◽  
Time Slot Allocation ◽  
Dynamic Time

With the advancement in networking, information and communication technologies, wireless body area networks (WBANs) are becoming more popular in the field of medical and non-medical applications. Real-time patient monitoring applications generate periodic data in a short time period. In the case of life-critical applications, the data may be bursty. Hence the system needs a reliable energy efficient communication technique which has a limited delay. In such cases the fixed time slot assignment in medium access control standards results in low system performance. This paper deals with a dynamic time slot allocation scheme in a fog-assisted network for a real-time remote patient monitoring system. Fog computing is an extended version of the cloud computing paradigm, which is suitable for reliable, delay-sensitive life-critical applications. In addition, to enhance the performance of the network, an energy-efficient minimum cost parent selection algorithm has been proposed for routing data packets. The dynamic time slot allocation uses fuzzy logic with input variables as energy ratio, buffer ratio, and packet arrival rate. Dynamic slot allocation eliminates the time slot wastage, excess delay in the network and attributes a high level of reliability to the network with maximum channel utilization. The efficacy of the proposed scheme is proved in terms of packet delivery ratio, average end to end delay, and average energy consumption when compared with the conventional IEEE 802.15.4 standard and the tele-medicine protocol.

Performance analysis of dynamic time-slot allocation system

2001 ◽  
Author(s):  
Hongwei Kong ◽  
Fang Ruan ◽  
Chongxi Feng
Keyword(s):  
Performance Analysis ◽  
Time Slot ◽  
Slot Allocation ◽  
Allocation System ◽  
Time Slot Allocation ◽  
Dynamic Time

scholarly journals Energy Efficiency and User Capacity Optimization of Cognitive MIMO Systems Via the SCMA-Based Nonorthogonal Time Slot Allocation

Symmetry ◽  
2020 ◽  
Vol 12 (7) ◽  
pp. 1136
Author(s):  
Pengju Zhang ◽  
Wenping Ge ◽  
Yongxing Zhang ◽  
Mengyao Gao ◽  
Gecheng Zhang
Keyword(s):  
Energy Efficiency ◽  
Multiple Access ◽  
Time Slot ◽  
Mimo Systems ◽  
Multiple Input Multiple Output ◽  
Average Power ◽  
Symmetric System ◽  
Slot Allocation ◽  
User Capacity ◽  
Time Slot Allocation

This paper investigates the energy-efficient communications and user capacity in the cognitive multiple input multiple output (MIMO) symmetric system of underlay mode. The advantage of the improved energy efficiency provided by the orthogonal slot allocation for time division multiple access (TDMA) has a side effect of restricting the number of users accessing the system. To tackle the above problem, this paper proposes a nonorthogonal time resource allocation method with sparse code multiple access (SCMA), which allows one to convert the orthogonal slot units of TDMA into non-orthogonal shared slot units for multiple secondary users (SUs). The method of adding virtual users is adopted, wherein each SU is treated as multiple SUs who occupy a shared unit, to facilitate the packet access. Finally, the greedy algorithm is applied to optimize the time slot allocation of unoccupied shared slot units. The simulation results show that SCMA-based nonorthogonal slot allocation can reduce not only the energy consumption by nearly 40%, but also the average power interference from SUs to primary users by nearly 2 dB if their number is relatively high. Moreover, in the case of satisfying the rate requirement of the users, the system user capacity increased by more than 50%.

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