Performance of a Concurrent Link SDMA MAC Under Practical PHY Operating Conditions

Zhao, Pengkai; Daneshrad, Babak; Warrier, Ajit; Zhu, Wenjun; Takeshita, O.Y.

doi:10.1109/tvt.2010.2103096

Cited by 8 publications

(6 citation statements)

References 12 publications

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“…Now we further look at frame F 2 's handshaking design, which is fully dependent on the switching decision in frame F 1 . Naturally, there are two separate possibilities to be discussed: July 16, 2018 DRAFT (i) frame F 1 's decision is concurrent link scheme; and (ii) frame F 1 's decision is single link scheme.…”

Section: B Distributive Handshaking In Frame Fmentioning

confidence: 99%

“…Otherwise, these MDUs are assumed to be lost. A more complete treatment of PPSNR July 16, 2018 DRAFT can be found in [16]. Obviously, each stream's optimal MCS can be adaptively selected according…”

Section: B Qos Based Throughput Metricmentioning

confidence: 99%

“…Unfortunately, one critical shortage in these works is that they all lack an explicit MAC design for managing the resource of concurrent links, and they also lack a concrete MAC policy for regulating the access of these links. Hence, for concurrent link scheme, it is strongly recommended to design the MAC and PHY algorithms in a joint way, which has been introduced in the literature as SPACEMAC ( [6], [7]), NULLHOC ( [8], [9]), Net-Eigen MAC [10] and MIMA- July 16, 2018 DRAFT MAC [11] protocols. Specifically, SPACEMAC, NULLHOC and Net-Eigen MAC all aim at designing elaborative beamforming vectors to distinguish separate links, while MIMA-MAC focuses on using spatial multiplexing and linear Rx vectors to suppress concurrent links' cochannel interference.…”

Section: Introductionmentioning

confidence: 99%

“…Concurrent link handshaking in frame F1 July 16, 2018. DRAFT Link L2's single link handshaking in frame F2.…”

mentioning

confidence: 99%

“…It should be noted that the notion of frame does not necessarily indicate a time division MAC structure July 16, 2018. DRAFT…”

mentioning

confidence: 99%

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An optimal single/concurrent link MAC scheme for a single-hop MIMO network

Zhao

Daneshrad

2011

2011 - MILCOM 2011 Military Communications Conference

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Concurrent link communications built on multi-antenna systems have been widely adopted for spatial resource exploitation. MIMA-MAC, a classical MIMO MAC protocol utilizing concurrent link scheme, is able to provide superior link throughput over conventional single link MAC (under certain isolated link topologies). However, when utilizing rich link adaptation functions in MIMO systems, there exists a non-ignorable probability that MIMA-MAC's throughput will be lower than that of single link scheme (such probability is dominated by the statistics of instantaneous link topology and channel response).Inspired by this critical observation, and for adapting to various link topologies, this paper will present a novel MAC design that can adaptively switch between single or concurrent link scheme. With the aim of absolutely outperforming the single link MAC, here our optimization criterion is to guarantee a throughput result that is either better than or at least equal to single link MAC's counterpart. To highlight the design rationale, we first present an idealized implementation having network information perfectly known in a non-causal way. Then for realistic applications, we further develop a practical MAC implementation dealing with realistic system impairments (distributed handshaking and imperfect channel estimation). Simulation results validate that link throughput in our MAC is higher than or equal to single link MAC's counterpart with minimized outage probabilities. And for ergodic link throughput, our proposed MAC can outperform the single link MAC and MIMA-MAC by around 20%-30%.

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Section: B Distributive Handshaking In Frame Fmentioning

confidence: 99%

Section: B Qos Based Throughput Metricmentioning

confidence: 99%