A Survey of Emerging Interconnects for On-Chip Efficient Multicast and Broadcast in Many-Cores

Karkar, Ammar; Mak, Terrence; Tong, Kin‐Fai; Yakovlev, Alex

doi:10.1109/mcas.2015.2510199

Cited by 125 publications

(70 citation statements)

References 61 publications

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“…However, globally shared-medium schemes will only be considered as serious contenders provided that their scalability is demonstrated. Among the different ways to implement such strategy [23], [25], [26], we chose to focus on the wireless RF paradigm due to its inherent broadcast capabilities and potential scalability [7].…”

Section: Motivation and Related Workmentioning

confidence: 99%

“…Further down the road towards terahertz operation, graphene technologies are under intense research due to its exceptional properties [43], [44], [45]. Finally, the use of the recently proposed surface wave technology [23], [46] could significantly reduce the power consumption due to its highly improved propagation method. In all cases, we believe that the benefits of the WNoC application could represent a strong technology pull and drive new research on the field.…”

Section: Phy: Towards Core-level Wireless Communicationmentioning

confidence: 99%

“…The use of a secondary control channel in any of the wireless schemes (to transmit the NACKs in W-CSMA, for instance) would incur into additional overhead, yet much lower than for the data channel. These figures could be reduced by means of transceiver optimization, the system-level techniques described in Section 6.4, or the use of surface wave technologies bringing propagation losses down to transmission line levels [23], [46]. In any case, it is worth noting that the cost of the wireless channel for broadcasts could be in part compensated by the fact that the wired plane can be simplified.…”

Section: Implementation Costmentioning

confidence: 99%

“…Alternatively, multicast support in high-radix switches has been proposed but not evaluated [22]. The advent of emerging interconnect tech- nologies also opens a set of opportunities within this context [23]. For instance, multicast methods have been extended to 3D topologies enabled by vertical stacking [24].…”

Section: Introductionmentioning

confidence: 99%

“…Further, the service of multicast traffic through dedicated broadcast channels by means of global RF transmission lines and nanophotonic waveguide bundles has been inspected [25], [26]. Finally, on-chip wireless communication stands as one of the most promising options given its inherent broadcast capabilities [7], [23], [27].…”

Section: Introductionmentioning

confidence: 99%

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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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