By Rabab Ezz-Eldin, Magdy Ali El-Moursy, Hesham F. A. Hamed
This ebook describes intimately the impression of approach diversifications on Network-on-Chip (NoC) functionality. The authors review a variety of NoC topologies less than excessive method version and clarify the layout of effective NoCs, with complex applied sciences. The dialogue comprises edition in common sense and interconnect, which will overview the hold up and throughput edition with varied NoC topologies. The authors describe an asynchronous router, as a strong layout to mitigate the influence of procedure edition in NoCs and the functionality of alternative routing algorithms is set with/without approach edition for varied site visitors styles. also, a unique method edition hold up and Congestion acutely aware Routing set of rules (PDCR) is defined for asynchronous NoC layout, which outperforms assorted adaptive routing algorithms within the usual hold up and saturation throughput for varied site visitors patterns.
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Extra resources for Analysis and Design of Networks-on-Chip Under High Process Variation
Req and ACK signals are transmitted in signaling interconnects using data encoding technique as described in the next section. 4 Data Encoding Data encoding is used to guarantee the timing robustness in data transmission. Bundled-data encoding and delay-insensitive encoding are widely used types of data encoding. 23. A and B, respectively. 2 Synchronization in NoC Single-rail data Bundling signal Req X Y Sender Receiver ACK Fig. 24 Bundled-data encoding ACK ACK Req Data Req C C ACK ACK Req C P Latch C P Latch Req C C P Latch Data Fig.
24 Bundled-data encoding ACK ACK Req Data Req C C ACK ACK Req C P Latch C P Latch Req C C P Latch Data Fig. Bundled-Data Encoding To guarantee that all data bits are stable and valid at the receiver, a bundling signal (Req) is used as an extra interconnect. 24. Bundled-data encoding can be divided into two-phase and four-phase as described in the following sections. (a) Two-phase bundled-data encoding In the two-phase bundled-data protocol, Req or ACK event is encoded as a single transition. Consequently, the transition from 0 to 1 or from 1 to 0 represents a single event.
The conversion between the single-rail data encoding and delay-insensitive encoding is necessary for global communication. Bundled-data encoding interface is used in some of asynchronous communication wrappers [32–34]. Bundled-data encoding is 2 Network on Chip Aspects 32 Fig. f FIFO Data Dual to Single Converter (DSC) B Fig. 30 Protocols converters considered as the intrinsic solution for both the complexity and area overhead of FIFOs which are inserted at the input/output ports of NoC router.
Analysis and Design of Networks-on-Chip Under High Process Variation by Rabab Ezz-Eldin, Magdy Ali El-Moursy, Hesham F. A. Hamed