A Group-aware Multicast Scheme in 60GHz WLANs

Abstract

The relation of multicast transmission and directional antennas is an open problem that has been debated for a long period of time. In this paper, we propose a group-aware multicast scheme of efficient multicast communication using the directional antennas for 60GHz millimeter wave wireless networks. For this purpose, we first derive the relation among beamwidth, distance between devices and most suitable data rate in the 60GHz frequency-based wireless network. In addition, for the dynamic beamforming of multicast communication, the x and y coordinates of any point with sender device at the center is generated, and a best-chosen group is deduced based on the Euclidean distance. Then the most suitable data rate for the group is obtained using the law of cosine. Using the Standard IEEE 802.11ad MAC protocol as an example, extensive simulation results demonstrate that the proposed scheme outperforms the existing multicast communication schemes with directional antennas under different situations.

Efficient Management of Multicast Traffic in Directional mmWave Networks

“…Several works in the literature propose strategies for grouporiented communications in directional systems. In [18], a group-aware multicast scheme (GAMS) compatible with the IEEE 802.11ad to manage steerable beamforming for multicast devices is proposed. Specifically, multicast beamforming is performed during an association beamforming training (A-BFT) interval of 802.11ad beacon interval (BI).…”

“…where |A| is the complexity due to the "while" cycle over all |A| users in the worst case of the unicast transmission (lines [6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21]. This means that each beam j covers only a single user.…”

Distributed Relay-Assisted Retransmission Scheme for Wireless Home Networks

“…In wireless systems, there exist much complicated propagation characteristics of radio waves. Therefore, various channel models were studied to describe the property of wireless channel [20, 21]. Let GTfalse(ifalse), GRfalse(ifalse), and δi,j be the antenna gains of the transmitter and the receiver of stream i and the distance between the transmitter of stream i and the receiver of stream j , j≠i, respectively.…”

“…Therefore, various channel models were studied to describe the property of wireless channel [20,21]. Let ( ), ( ), and , be the antenna gains of the transmitter and the receiver of stream and the distance between the transmitter of stream and the receiver of stream , ̸ = , respectively.…”

Asymmetric Directional Multicast for Capillary Machine-to-Machine Using mmWave Communications

“…In these applications, the devices that users have can be divided into multiple service groups, and each group might request different multimedia contents such as video streaming, presentation material from a dedicated local server (e.g., projector, presenter’s laptop). The local server should support a sufficient data rate to multiple groups via a ‘group-to-project connection’, for which mmWave multicast transmission is an indispensable technology for creation of the seamless interaction service [ 14 , 15 , 16 ]. In the mmWave band, the use of directional antennas is considered essential even for multicast transmission due to the short propagation distance problem caused by the unique characteristics of mmWave frequency band such as its oxygen absorption and high path loss [ 17 , 18 , 19 ].…”