Massive Access Control in Machine-to-Machine Communications

2019 ◽  
pp. 133-157
Author(s):  
Pawan Kumar Verma ◽  
Rajesh Verma ◽  
Arun Prakash ◽  
Rajeev Tripathi
Keyword(s):  
Energy Consumption ◽  
Ieee 802.11 ◽  
Mac Protocol ◽  
Transmission Delay ◽  
Frame Structure ◽  
Direct Communication ◽  
Data Packets ◽  
802.11 Dcf ◽  
Mac Scheme ◽  
Average Transmission

This chapter proposes a new hybrid MAC protocol for direct communication among M2M devices with gateway coordination. The proposed protocol combines the benefits of both contention-based and reservation-based MAC schemes. The authors assume that the contention and reservation portion of M2M devices is a frame structure, which is comprised of two sections: contention interval (CI) and transmission interval (TI). The CI duration follows p-persistent CSMA mechanism, which allows M2M devices to contend for the transmission slots with equal priorities. After contention, only those devices which have won time-slots are allowed to transmit data packets during TI. In the proposed MAC scheme, the TI duration follows TDMA mechanism. Each M2M transmitter device and its corresponding one-hop distant receiver communicate using IEEE 802.11 DCF protocol within each TDMA slot to overcome various limitations of TDMA mechanism. The authors evaluate the performance of the proposed hybrid MAC protocol in terms of aggregate throughput, average transmission delay, channel utility, and energy consumption.

Throughput-Delay Evaluation of a Hybrid-MAC Protocol for M2M Communications

2016 ◽  
Vol 7 (1) ◽  
pp. 41-60 ◽  
Author(s):  
Pawan Kumar Verma ◽  
Rajesh Verma ◽  
Arun Prakash ◽  
Rajeev Tripathi
Keyword(s):  
Ieee 802.11 ◽  
Mac Protocol ◽  
Frame Structure ◽  
Direct Communication ◽  
Data Packets ◽  
Ieee 802.11 Dcf ◽  
M2m Communications ◽  
802.11 Dcf ◽  
Mac Scheme ◽  
Simulation Results

This paper proposes a robust hybrid-MAC protocol for direct communication among M2M devices with gateway coordination. The proposed protocol combines the benefits of both contention-based and reservation-based MAC schemes. The authors assume that the contention and reservation portion of M2M devices is a frame structure, which is comprised of two sections: Contention Interval (CI) and Transmission Interval (TI). The CI is based on p-persistent CSMA mechanism, which allows M2M devices to compete for the transmission slots with equal priorities. After contention, only those devices, which have won time-slots, are allowed to transmit data packets during TI. In the authors' proposed MAC scheme, the TI is basically a TDMA frame and each M2M device is 802.11 enabled. Each M2M transmitter device and its corresponding one-hop distant receiver communicate using IEEE 802.11 DCF protocol within each TDMA slot to overcome the limitations of TDMA mechanism. The simulation results demonstrate the effectiveness of the proposed hybrid-MAC protocol.

scholarly journals Dynamic Duty-Cycle MAC Protocol for IoT Environments and Wireless Sensor Networks

Energies ◽  
2019 ◽  
Vol 12 (21) ◽  
pp. 4069 ◽  
Author(s):  
Gayoung Kim ◽  
Jin-Gu Kang ◽  
Minjoong Rim
Keyword(s):  
Energy Consumption ◽  
Duty Cycle ◽  
Traffic Congestion ◽  
Mac Protocol ◽  
Window Size ◽  
Transmission Delay ◽  
Contention Window ◽  
Peak Time ◽  
Contention Window Size ◽  
The Internet Of Things

This paper proposes a new protocol that can be used to reduce transmission delay and energy consumption effectively. This will be done by adjusting the duty-cycle (DC) ratio of the receiver node and the contention window size of the sender node according to the traffic congestion for various devices in the Internet of Things (IoT). In the conventional duty-cycle MAC protocol, the data transmission delay latency and unnecessary energy consumption are caused by a high collision rate. This is because the receiver node cannot sufficiently process the data of the transmitting node during the traffic peak time when the transmission and reception have the same duty-cycle ratio. To solve this problem, this paper proposes an algorithm that changes the duty-cycle ratio of the receiver and broadcasts the contention window size of the senders through Early Acknowledgment (E-ACK) at peak time and off/peak time. The proposed algorithm, according to peak and off/peak time, can transmit data with fewer delays and minimizes energy consumption.

scholarly journals Performance Evaluation of Modified IEEE 802.11 MAC for Multi-Channel Multi-Hop Ad Hoc Networks

2003 ◽  
Vol 04 (03) ◽  
pp. 345-359 ◽  
Author(s):  
Jiandong Li ◽  
Zygmunt J. Haas ◽  
Min Sheng ◽  
Yanhui Chen
Keyword(s):  
Access Control ◽  
Ad Hoc Networks ◽  
Ieee 802.11 ◽  
Scaling Laws ◽  
Ad Hoc ◽  
Single Channel ◽  
Mac Protocol ◽  
Data Packets ◽  
Hoc Networks ◽  
802.11 Mac

In this paper, the IEEE 802.11 multiple access control (MAC) protocol was modified for use in multi-channel, multi-hop ad hoc networks through the use of a new channel-status indicator. In particular, in the modified protocol, the RTS/CTS dialogue is exchanged on the common access control channel and data packets are transmitted on a selected traffic channel. We have evaluated the improvement due to the multi-channel use and we report in this paper on the results of the per-node throughput and the end-to-end delay for different network sizes. Using these results, we were able to propose a number of per-node throughput scaling laws. Our simulation results show that the per-node throughput with multiple channels for the fully connected, the line, and the grid ad hoc network topologies increases by 90% to 253%, by 47%, and by 139% to 163%, respectively, for networks with 16 to 64 nodes, as compared with that of a single channel.

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