Reconfigurable Wireless Network-on-Chip with a Dynamic Medium Access Mechanism

Mansoor, Naseef; Ganguly, Amlan

doi:10.1145/2786572.2788711

Cited by 21 publications

(20 citation statements)

References 28 publications

(41 reference statements)

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“…Physical Constraints [1], [5], [6], [9], [ [8] by implementing both token passing and CSMA and designing a controller that dynamically switches between both strategies depending on the load. A step further towards this direction would be the use of protocols that naturally and gradually adapt their characteristics to the load without the need of an external controller.…”

Section: Conventional Wireless Networkmentioning

confidence: 99%

Medium Access Control in Wireless Network-on-Chip: A Context Analysis

et al. 2018

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Wireless on-chip communication is a promising candidate to address the performance and efficiency issues that arise when scaling current Network-on-Chip (NoC) techniques to manycore processors. A Wireless Network-on-Chip (WNoC) can serve global and broadcast traffic with ultra-low latency even in thousand-core chips, thus acting as a natural complement of conventional and throughput-oriented wireline NoCs. However, the development of Medium Access Control (MAC) strategies needed to efficiently share the wireless medium among the increasing number of cores remains as a considerable challenge given the singularities of the environment and the novelty of the research area. In this position paper, we present a context analysis describing the physical constraints, performance objectives, and traffic characteristics of the on-chip communication paradigm. We summarize the main differences with respect to traditional wireless scenarios, to then discuss their implications on the design of MAC protocols for manycore WNoCs, with the ultimate goal of kickstarting this arguably unexplored research area.

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Section: Conventional Wireless Networkmentioning

confidence: 99%

Medium Access Control in Wireless Network-on-Chip: A Context Analysis

et al. 2018

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“…The work in [56] proposes a slotted CSMA scheme with theoretically optimal persistence calculated a priori, and compares its performance with that of a token passing scheme. Given that these protocols perform better for different loads, the authors of [57] propose a scheme that dynamically switches between both depending on communication intensity.…”

Section: Mac: Medium Access Control In Wnocmentioning

confidence: 99%

Scalability of Broadcast Performance in Wireless Network-on-Chip

Abadal

Mestres

Nemirovsky

et al. 2016

IEEE Trans. Parallel Distrib. Syst.

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Abstract-Networks-on-Chip (NoCs) are currently the paradigm of choice to interconnect the cores of a chip multiprocessor. For hundreds or thousands of cores, though, conventional NoCs may not suffice to fulfill the increasing on-chip communication requirements given that the performance of such networks actually drops as the number of cores grows, especially in the presence of multicast and broadcast traffic. This not only limits the scalability of current multiprocessor architectures, but also sets a performance wall that prevents the development of architectures that generate moderate-to-high levels of multicast. In this paper, a Wireless Network-on-Chip (WNoC) where all cores share a single broadband channel is presented. Such design is conceived to provide low latency and ordered delivery for multicast/broadcast traffic, in an attempt to complement a wireline NoC that will transport the rest of communication flows. To assess the feasibility of this approach, the network performance of WNoC is analyzed as a function of the system size and the channel capacity, and then compared to that of wireline NoCs with embedded multicast support. Based on this evaluation, preliminary results on the potential performance of the proposed hybrid scheme are provided, together with guidelines for the design of MAC protocols for WNoC.

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“…Dai et al propose the use of slotted Carrier Sense Multiple Access (CSMA) with optimal persistence calculated a priori [6]. Also, Mansoor et al present an adaptive scheme that switches between CSMA and token passing depending on the level of contention [14]. These works show novelty, but do not detail how would multicasts be acknowledged or how the protocol scales.…”

Section: Broadcast-oriented Wireless Network-on-chipmentioning

confidence: 99%

“…In this paper, we focus on the MAC issue and propose BRS-MAC, a protocol specifically suited to the broadcastoriented WNoCs. We observed that existing works on WNoC either rely on channelization or token passing schemes that do not scale well [7,9], or map protocols to the on-chip scenario without considering broadcast patterns [6,14]. Instead, our work takes advantage of the unique application context to propose a scalable and reliable solution, as well as to develop highly accurate performance models.…”

Section: Introductionmentioning

confidence: 99%

A MAC protocol for Reliable Broadcast Communications in Wireless Network-on-Chip

Mestres

Abadal

Torrellas

et al. 2016

Proceedings of the 9th International Workshop on Network on Chip Architectures

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The Wireless Network-on-Chip (WNoC) paradigm holds considerable promise for the implementation of fast and efficient on-chip networks in manycore chips. Among other advantages, wireless communications provide natural broadcast support, a highly desirable feature in manycore architectures yet difficult to achieve with current interconnects. As technology advancements allow the integration of more wireless interfaces within the same chip, a critical aspect is how to efficiently share the wireless medium while reliably carrying broadcast traffic. This paper introduces the {Broadcast, Reliability, Sensing} protocol (BRS-MAC), which exploits the particularities of the WNoC context to meet its stringent requirements. BRS-MAC is flexible and employs a collision detection and notification scheme that scales with the number of receivers, making it compatible with broadcast communications. The proposed protocol is modeled and evaluated, showing a clear latency advantage with respect to wired on-chip networks and WNoCs with token passing.

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Reconfigurable Wireless Network-on-Chip with a Dynamic Medium Access Mechanism

Cited by 21 publications

References 28 publications

Medium Access Control in Wireless Network-on-Chip: A Context Analysis

Medium Access Control in Wireless Network-on-Chip: A Context Analysis

Scalability of Broadcast Performance in Wireless Network-on-Chip

A MAC protocol for Reliable Broadcast Communications in Wireless Network-on-Chip

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