Enabling WLAN and WPAN Coexistence via Cross-Technology Communication

Kim, Seungku

doi:10.3390/s22030707

Cited by 4 publications

(1 citation statement)

References 17 publications

(27 reference statements)

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“…Стаття [9] пропонує модифіковану схему CSMA/CA, яка забезпечує координацію каналів між різнорідними безпровідними технологіями. Як технології WLAN і WPAN використовуються мережі Wi-Fi (IEEE 802.11) і Zigbee (IEEE 802.15.4).…”

Section: постановка проблемиunclassified

Analysis of the Csma/Ca Scheme for Wireless Local Area Networks

OBELOVSKA,

PELEKH,

PELEKH

et al. 2022

Herald KhmNU.TS

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The current stage of telecommunication technologies development is characterized by the rapid growth use of wireless technologies in access networks and the growth requirements for its quality. The bottleneck that significantly reduces the bandwidth of each subscriber connection is that the total bandwidth of the wireless local network is shared among its active members by the shared technology used. The access management sub-layer to the shared physical environment is responsible for this in the network architecture. The main method used at this sub-layer is the Carrier Sense Multiple Access with Collision Avoidance (CSMA/CA) scheme. This work is devoted to the analysis of CSMA/CA scheme and the development of an analytical model for its further study and use for the improvement of wireless local networks. The input data is a transition state diagram of a local area wireless network station in data transmission mode. According to the CSMA/CA scheme, stations cannot change their state after starting frame transmission until a confirmation frame of successful reception arrives from the addressee or until the time to wait for it expires. Considering this, it is proposed to use a simplified transition state diagram for the analysis. The operation of the station by the simplified transition state diagram is described using a system of differential equations. As a result of the solution of this system, expressions representing the probability of the station being in each of its states as a function of the intensities of the station’s transitions from each state to another are derived. The values of these intensities depend on both the outgoing traffic of the station and the traffic in the network. The resulting expressions can be used in further work on the analysis of the CSMA/CA scheme, as they make it possible to estimate the operation of the station at different ratios of the station’s output traffic and external traffic generated by other stations of the network. This can be used to develop an enhanced algorithm station operation of wireless local area networks by adapting the parameters of the CSMA/CA scheme to specific current loads of both the station and the network.

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Section: постановка проблемиunclassified

Analysis of the Csma/Ca Scheme for Wireless Local Area Networks

OBELOVSKA,

PELEKH,

PELEKH

et al. 2022

Herald KhmNU.TS

View full text Add to dashboard Cite

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Improving Fairness in Coexisting 5G and Wi-Fi Network on Unlicensed Band with URLLC

Zou

Chu

et al. 2023

2023 IEEE/ACM 31st International Symposium on Quality of Service (IWQoS)

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Methods and means of conflict-free data exchange in the group of mobile robotic platforms

Tsmots,

Opotiak,

Obelovska

et al. 2024

UJIT

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When using groups of mobile robotic platforms (MRP), problems arise related to the management of individual platforms, the organization of cooperation in the group, and the management of the group as a whole. Management of the MRP group involves managing the actions of individual platforms to achieve the group's overall goal. To ensure the management of the MRP group in such a case, it is advisable to choose a hybrid method that requires solving the problem of conflict-free data exchange and control commands between the MRPs in the group. To solve this problem, it is proposed to improve the relevant methods and tools. The scientific novelty of the obtained research results is that a method of multi-channel conflict-free data exchange has been developed, which provides a real-time mode due to the coordination of the intensity of data arrival with the intensity of access. The method of controlling the movement of a group of mobile robotic platforms has been improved, which, by taking into account the changing parameters of the platforms and the changing state of the surrounding environment, provides effective management of the MRP group in real time. The practical significance of the research results is that it is proposed to use the CSMA/CA slotted mechanism for non-time-critical traffic to improve performance, and for time-critical traffic, coordinator-controlled access using guaranteed time slots. The hybrid method of management takes into account the advantages of centralized and distributed depending on specific tasks and conditions of use. It is proposed to use a multi-channel device for conflict-free exchange using the method of time allocation of RAM resources for data exchange in hybrid control. It is shown that global low-power networks LPWANs (Low-Power Wide Area Networks) can be used to transmit small blocks of data at a low speed when exchanging with MRP. It is proposed to use the slotted CSMA/CA mechanism for the transmission of non-time-critical traffic, and for time-critical traffic, coordinator-controlled access using guaranteed time slots. It is shown that the performance of the network during the conflict-free access period CFP depends on the results of the distribution of guaranteed GTS time slots among active users. LoRa technology was selected for long-distance data exchange between MRPs, which at the MAC (Media Access Control) sublayer allows for transmission planning and communication management between end devices and gateways, avoiding collisions and optimizing network performance.

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Enabling WLAN and WPAN Coexistence via Cross-Technology Communication

Cited by 4 publications

References 17 publications

Analysis of the Csma/Ca Scheme for Wireless Local Area Networks

Analysis of the Csma/Ca Scheme for Wireless Local Area Networks

Improving Fairness in Coexisting 5G and Wi-Fi Network on Unlicensed Band with URLLC

Methods and means of conflict-free data exchange in the group of mobile robotic platforms

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