Access control scheme for collision detection utilizing MIMO transmission

Hiraguri, Takefumi; Nishimori, Kentaro; Ogawa, Tomoko; Kataoka, Ryochi; Takase, Hiroshi; Yoshino, Hideaki; Makino, Hideo

doi:10.1587/comex.2.129

Cited by 9 publications

(7 citation statements)

References 3 publications

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“…To realize collision detection and achieve high transmission efficiency, we have previously proposed an access control scheme that utilizes the feature on IEEE 802.11n based MIMO transmission using short preamble signals [2,3]. In this paper, we confirmed the performance of this proposed scheme through detailed theoretical analysis.…”

Section: Introductionsupporting

confidence: 53%

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Theoretical analysis of collision detection scheme utilizing MIMO frame structure

et al. 2015

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Mobile terminal stations utilizing wireless local area network (WLAN) devices have recently increased. Hence, packet collisions due to interfering signals have become an important issue. WLANs detect collisions when the acknowledgment (ACK) frame is not returned. This considerably reduces the WLAN transmission efficiency. This paper proposes a retransmission control scheme utilizing multiple input multiple output (MIMO) transmission, in which collisions may be detected during signal transmission. We evaluated and analyzed the effectiveness of the proposed scheme through computer simulations and theoretical analysis. The theoretical analysis agree with the computer simulation results, indicating the efficiency and reliability of our proposed scheme.

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Section: Introductionsupporting

confidence: 53%

“…The proposed scheme provides access control for WLANs [2,3]. That is, it enables detection of collisions before transmission of data packets, thereby reducing unnecessary transmission time due to packet collisions and thus effectively utilizing the wireless band.…”

Section: Overview Of the Proposed Schemementioning

confidence: 99%

Theoretical analysis of collision detection scheme utilizing MIMO frame structure

et al. 2015

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“…The wired LAN can detect the packet collision by the voltage variation inside the Ethernet cable before packet transmission. Since the wired LAN employs packet contention detection in advance and re-transmission immediately, transmission efficiency is over 90% [3]. On the other hand, the access control method called CSMA/collision avoidance (CSMA/CA) is adopted in WLAN [1].…”

Section: Introductionmentioning

confidence: 99%

Interference detection method using wireless LAN based MIMO transmission

et al. 2013

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This paper proposes an interference detection method in MIMO transmission, which utilizes periodical preamble signals in a frequency domain. In the propose method, second antenna receives the signals while first antenna transmits the preamble signals. Hence, the interference can be detected by observing the subcarriers which are not mapped short preamble signal using the received signal after the FFT processing. Moreover, we utilize the orthogonal polarized antennas to reduce the mutual coupling between the transmitter and receiver. By a computer simulation and measurement with the use of orthogonal polarized antenna, it is shown that the proposed method can successfully detect interference from the other system when the interfering power is greater than the noise power.

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“…To avoid such collisions, wired LAN systems can implement an access control scheme called carrier sense multiple access/collision detection (CSMA/CD) in which, prior to packet transmission, collisions are detected from voltage variations occurring within the Ethernet cable [2]. As this method for wired LAN transmission involves packet detection in advance and immediate retransmission, its efficiency is over 90% [3]. As a result, the issues surrounding this method have been intensively studied [4,5].…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, the reception characteristics are judged from the reply of acknowledgement (ACK) sent by a receiving station. Compared to wired LAN, the transmission efficiency of wireless LAN is very small, and its value is less than 65%, because retransmission cannot be started until ACK is judged [3]. Therefore, collision detection, which is used in wired communication systems, is essential for achieving high transmission efficiency.…”

Section: Introductionmentioning

confidence: 99%

Collision Detection Method Using Self Interference Cancelation for Random Access Multiuser MIMO

et al. 2017

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This paper proposes an interference detection method for multiuser-multiple input multiple output (MU-MIMO) transmission, which utilizes periodical preamble signals in the frequency domain and the concept of full-duplex transmission when assuming idle antennas at the access point (AP) in MU-MIMO. In the propose method, collision detection (CD) of MU-MIMO is achieved by utilizing asynchronous MU-MIMO called random access MU-MIMO. In random access MU-MIMO, several antennas that are not used for the transmission exist, due to asynchronous MU-MIMO. Hence, idle antennas at the AP can receive preamble signals while the transmit antennas at the AP transmit the preamble signals: this procedure is regarded as full-duplex transmission, which cancels the self-interference between AP antennas. The interference can be detected by subtracting the short preamble signal, which is multiplied by the estimated channel response using the received signal after the FFT processing. Moreover, we utilize dual polarization to reduce the mutual coupling between transmit and receive antennas at the AP. Through a computer simulation, it is shown that the proposed method can successfully detect collision from other user terminals (UTs) with OFDM signals when the interfering power from the interfering user terminal (IT) is greater than the noise power. In addition, the interfering power from IT at the AP and the desired user terminal (DT) is measured in an actual indoor environment, and the possibility of using the proposed method at the AP is discussed by using the measurement results.

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Access control scheme for collision detection utilizing MIMO transmission

Cited by 9 publications

References 3 publications

Theoretical analysis of collision detection scheme utilizing MIMO frame structure

Theoretical analysis of collision detection scheme utilizing MIMO frame structure

Interference detection method using wireless LAN based MIMO transmission

Collision Detection Method Using Self Interference Cancelation for Random Access Multiuser MIMO

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