SPACE-MAC: Enabling Spatial Reuse using MIMO channel-aware MAC

Park, Joon‐Sang; Nandan, Aridaman Singh; Gerla, Mário; Lee, Heechoon

doi:10.1109/icc.2005.1495096

Cited by 67 publications

(1 citation statement)

References 6 publications

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“…In [7], the authors proposed a scheme that involves transmit antenna and data rate selection based on an optimal trade-off between MIMO spatial multiplexing and MIMO diversity/ coding technique, based on the channel state information (CSI). The work in [8], [9], and [10] introduce MAC protocols based on MIMO-BF to create a pattern of constructive and destructive interference to selectively listen or ignore a particular user transmissions. However, the main issue with these schemes is that inaccuracies in CSI can result in collision or interference to unintended users.…”

Section: Introductionmentioning

confidence: 99%

IEEE 802.11 medium access control enhancements based on simultaneous multiple‐input multiple‐output bandwidth sharing

Ashtaiwi

Sulyman

Hassanein

2012

Wireless Communications

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The demand for higher data rate has spurred the adoption of multiple-input multiple-output (MIMO) transmission techniques in IEEE 802.11 products. MIMO techniques provide an additional spatial dimension that can significantly increase the channel capacity. A number of multiuser MIMO system have been proposed, where the multiple antenna at the physical layer are employed for multiuser access, allowing multiple users to share the same bandwidth. As these MIMO physical layer technologies further evolve, the usable bandwidth per application increases; hence, the average service time per application decreases. However, in the IEEE 802.11 distributed coordination function-based systems, a considerable amount of bandwidth is wasted during the medium access and coordination process. Therefore, as the usable bandwidth is enhanced using MIMO technology, the bandwidth wastage of medium access and coordination becomes a significant performance bottleneck. Hence, there is a fundamental need for bandwidth sharing schemes at the medium access control (MAC) layer where multiple connections can concurrently use the increased bandwidth provided by the physical layer MIMO technologies. In this paper, we propose the MIMO-aware rate splitting (MRS) MAC protocol and examine its behavior under different scenarios. MRS is a distributed MAC protocol where nodes locally cooperate with one another to share bandwidth via splitting the spatial channels of MIMO systems. Simulation results of MRS protocol are obtained and compared with those of IEEE 802.11n protocol. We show that our proposed MRS scheme can significantly outperform the IEEE 802.11n in medium access delay and throughput.

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Section: Introductionmentioning

confidence: 99%