Design of an access mechanism for a high speed distributed wireless LAN

Gummalla, A.; Limb, J.O.

doi:10.1109/49.872960

Cited by 27 publications

(23 citation statements)

References 8 publications

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“…The main function associated with the busy-tone channel is to detect a busy-tone signal of known form in the presence of noise. Gummalla and Limb have discussed one possibility for the design of such a transceiver architecture in [6]. Different from the scheme using "black burst" for high priority source stations to occupy the entire channel [17], in the above simple scheme, high priority source stations send the busy tone signal on a busy tone sub-channel to indicate the presence of backlogged high priority packets.…”

Section: A Simple Priority Scheduling Schemementioning

confidence: 97%

Priority Scheduling in Wireless Ad Hoc Networks

Yang

Vaidya

2005

Wireless Netw

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Ad hoc networks formed without the aid of any established infrastructure are typically multi-hop networks. Location dependent contention and hidden terminal problem make priority scheduling in multi-hop networks significantly different from that in wireless LANs. Most of the prior work related to priority scheduling addresses issues in wireless LANs. In this paper, priority scheduling in multi-hop networks is discussed. We propose a scheme using two narrow-band busy tone signals to ensure medium access for high priority source stations. The simulation results demonstrate the effectiveness of the proposed scheme.

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Section: A Simple Priority Scheduling Schemementioning

confidence: 97%

Priority Scheduling in Wireless Ad Hoc Networks

Yang

Vaidya

2005

Wireless Netw

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“…The difference between the BTE and PSID algorithms in calculating the average ON-OFF delay is caused by the value of T j (or S j ). Therefore,(19) is valid for both the BTE and PSID algorithms.…”

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confidence: 88%

Performance Evaluation of Energy-Saving Mechanism Based on Probabilistic Sleep Interval Decision Algorithm in IEEE 802.16e

Lee

Cho

2007

IEEE Trans. Veh. Technol.

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While the legacy power-saving mechanism in wireless networks usually uses a predetermined and fixed sleep interval to enhance the energy conservation of mobile stations, the IEEE 802.16e Mobile WiMAX system adopts a power-saving mechanism with a binary truncated exponent (BTE) algorithm for determining sleep intervals. Although the BTE algorithm allows more flexibility in determining sleep intervals, it still does not consider the delay of the response packet. Thus, in this paper, we suggest a new power-saving mechanism, which is the probabilistic sleep interval decision (PSID) algorithm, in the context of an IEEE 802.16e Mobile WiMAX system. While the length of sleep interval is restricted by the upper and lower bounds, irrespective of response packet's arrival time under the BTE algorithm, the PSID algorithm determines sleep interval placement by using the distribution function of the response packet's arrival time so that the response packet may arrive at the base station during each sleep interval with the same probability. To compare the two algorithms, the main properties of the BTE algorithm and the proposed PSID algorithm are discussed, and a theoretical framework for analyzing its performance is provided. Analytical and simulation results show that under the BTE algorithm, energy consumption and buffering delay converge to a saturation point, and a short buffering delay can be obtained at the expense of sacrificing energy consumption. Meanwhile, the PSID algorithm performs better with respect to energy consumption and buffering delay than the BTE algorithm.Index Terms-Binary truncated exponent (BTE) algorithm, energy conservation, IEEE 802.16e, probabilistic sleep interval decision (PSID), sleep interval.

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“…In practice, the common and modified busy tone channels in our protocol can be combined since the RTS/CTS dialogue and busy tone signals will never be issued simultaneously with a mobile node. In addition, with the advance in hardware design, transceiver technology similar to the one that integrates the data channel and the feedback channel in the same frequency band [25] may also be used to further simplify the transceiver circuits. Finally, the power control mechanisms may also require additional circuits for tuning appropriate power level.…”

Section: Protocol Overhead and Practical Considerationsmentioning

confidence: 99%

A Highly Reusable Code Assignment Approach with Modified Busy Tone Signaling for CDMA-Based Ad Hoc Networks

Cheng

et al. 2007

Wireless Pers Commun

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Medium access control (MAC) protocol is among the most active topics of research in ad hoc networks. With the CDMA-based MAC protocol the code allocation plays an important role and has significant impact on the protocol performance. In this paper, we propose a distributed CDMA code assignment protocol for the mobile ad hoc networks (MANETs). The protocol is mainly composed of (1) a modified busy tone signaling mechanism that protects on-going data transmission as well as distributes code usage information, and (2) a set of specially designed code selection rules that work by taking into consideration whether relevant nodes are in the transmitting or receiving state. By combining the two proposed schemes with the conventional request-to-send (RTS)/clear-to-send (CTS) dialogue and power control mechanism, our protocol is able to increase CDMA code reusability. The simulation results indicate that the proposed protocol indeed performs better than the static and dynamic code assignment methods (either with or without power control) in terms of successful transmission rate and successful code assignment rate. And instead of sending continuously, the proposed modified busy tone mechanism only issues busy tone signal in randomly selected cycles, which may save battery energy as compared to conventional busy tone implementations. Moreover, the proposed code selection rules and the modified busy tone signaling may also be integrated into existing MAC protocols, either separately or in combination.

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Design of an access mechanism for a high speed distributed wireless LAN

Cited by 27 publications

References 8 publications

Priority Scheduling in Wireless Ad Hoc Networks

Priority Scheduling in Wireless Ad Hoc Networks

Performance Evaluation of Energy-Saving Mechanism Based on Probabilistic Sleep Interval Decision Algorithm in IEEE 802.16e

A Highly Reusable Code Assignment Approach with Modified Busy Tone Signaling for CDMA-Based Ad Hoc Networks

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