Data encoding 12 there is always a midbit transition which is used as a clocking mechanism. This technique was also based on the hopbyhop technique. Data encoding techniques for reducing energy consumption in network on chip, vlsi ieee projects, vlsi image processing. The data encoding techniques may be classified into two categories. An encoding scheme to reduce power consumption in networkson. Adaptive data compression for highperformance lowpower on. Mar 28, 20 data encoding techniques for reducing energy consumption in networkonchip abstract.
Performance analysis of an efficient low power noc router. It has a special feature to transfer the data in on chip named as transitional e ncoder. Request pdf data encoding techniques for reducing energy consumption in network on chip as technology shrinks, the power. It provides a set of data encoding and decoding schemes aimed at reducing the power dissipated by the links of a noc. Basic encoding techniques amplitudeshift keying one binary digit represented by presence of carrier, at constant amplitude other binary digit represented by absence of carrier where the carrier signal is acos2pf c t very susceptible to noise used to transmit digital data over optical fiber s t acos2pf c t 0 binary 1. To verify the efficiency of the proposed technique, encoder structure was designed by using veriloghdl. Tech scholar, eced cmr technical campus hyderabad, india sudha. A survey of techniques for energy efficient onchip communication.
Chip design drastically reduces energy needed to compute with. In vlsi technology in order to estimate and optimize the power consumption of a digital circuit, it is necessary. Data encoding techniques for lower power dissipation in. In this paper we present a novel data encoding scheme to reduce the power dissipation and the energy consumption of the communication system in a network on chip noc based systemonchip soc. Power reduction technique for data encoding in networkon. Reducing data transfer energy by exploiting similarity within. As the technology shrivel, the power dissipated by the communication subsystem, namely, the routers, nis, and links. Data encoding technique for reducing energy consumption noc. Pdf, video, music, text, and picture are used as the workloads are given in fig. Dasharath 2 1assistant professor, dept of ece, nalla malla reddy engineering college, hyderabad, ts, india. Since the bus power consumption is proportional to the switching activity, reducing the bus switching is an effective way to reduce bus power.
Sep 04, 2012 data encoded as presence or absence of signal transition at beginning of bit time transition low to high or hi gh to low denotes a binary 1 no transition denotes binary 0 this is an example of differential encoding. Data encoding techniques to improve the performance of system. Data encoding techniques for reducing energy consumption in network on chip 2014 abstract. The full inversion operation converts type ii transitions to type iv transitions. The direction of the midbit transition represents the digital data. Data encoding schemes in networks on chip ieee journals. Bus encoding aims to reduce this power by reducing the amount of activity number of toggles in the bus lines. Reference 12 proposes a pulsewidth modulation scheme in which three bits are encoded into the clockrelative pulse delay and pulse width in order to reduce power by limiting the switching activity on the bus.
Gray coding and transition method these are the various encoding techniques used in the noc. Reduction of power consumption in noc by using data encoding. While bus encoding can be used to serve various purposes like reducing the. In the first category, encoding techniques to concentrate the lowering power due to selfswitching activity of individual bus lines while ignoring to the power dissipation in their coupling switching activity. Introducing a special code for encoding further reduces energy consumption of the bus. The data encoding techniques are developed to reduce the power consumption caused by the transitions in the interconnect on the chip. The scheme compares the current data with the previous one to decide whether the odd, full, or no inversion of the current data can give rise to the link power reduction. As technology shrinks, the power dissipated by the links of a networkonchip noc starts to compete with the power dissipated by the. Data encoding techniques for reducing energy consumption in network on chip quantity add to cart categories. Implementation of data encoding techniques for reducing area. Design of smart powersaving architecture for network on chip. These include the techniques that make use of shielding, increasing linetoline spacing and repeater insertion. Data encoding techniques for lower power dissipation in network on chip written by d.
If you take an averaging spectrum analyser and look at the output signal of the 10mbps ethernet phaseencoded signal, you will see a power peak at 10mhz where there is a stream of 1s or 0s, you will see a smaller harmonic at 30mhz and if there is a. As technology shrinks, the power dissipated by the links of a networkon chip noc starts to compete with the power dissipated by the. Aug 01, 2019 intelligent data encoding techniques hold the promise of reducing the data movement energy. The data encoding techniques may be classified into two types. In this paper, we present a set of data encoding schemes aimed at reducing the power dissipated by the links of an noc. Request pdf data encoding techniques for reducing energy consumption in network on chip as technology shrinks, the power dissipated by the links of a network on chip noc starts to compete. In this paper, a novel architecture, namely, smart powersaving sps, for low power consumption. The data encoding techniques are based on reducing the number of transitions by considering the types of transitions the interconnects and in by considering them as discussed the table below and also in. In section v, the results for the hardware overhead, power and energy savings, and performance reduction of the proposed data encoding schemes are compared with those of other approaches. While numerous techniques exist for reducing bus power in address buses, only a handful of techniques have been proposed for data bus power reduction, where frequent value encoding fve is the best. In this same realm of work, 911 introduce encoding schemes to reduce link energy consumption by reducing line transitions. As technology shrinks, the power dissipated by the links of a network on chip noc starts to compete with the power dissipated by the other elements of the communication subsystem, namely, the routers and the network interfaces nis. Saikumar associate professor, eced cmr technical campus hyderabad,india tara.
The data encoding scheme is to reduce the link power dissipation. At the same time it supports systems which are higher operated frequencies. As results, we obtain a reduction in total power dissipation and energy consumption up to 37 % and 18%, respectively, without any significant degradation in terms of both performance and silicon area. Unlike soc, network on chip noc has so many advantages for data transfer. In this paper, we propose using data reuse technique for intra prediction algorithm in hevc decoder. A survey of encoding techniques for reducing datamovement energy. Data encoding techniques for reducing energy consumption in network on chip.
Apr 19, 2011 in this paper, we propose the use of data encoding techniques as a viable way to reduce both power dissipation and energy consumption of noc links. This is due to the fact that for each four bits, six bits are transmitted which increases the communication traffic. C1 c2 c3 c4 c7 c5 c6 segment 1 bus segment 2 splitter bus bus figure 3. Efficient data encoding and decoding for networkonchip. While numerous techniques exist for reducing bus power in address buses, only a handful of techniques have been proposed for data bus power reduction, where frequent value encoding fve is the best existing scheme to reduce the transition activity on the data buses. Data represented by changes rather than levels more reliable detection of transition rather than level. Energy saving using data encoding scheme in networkonchip.
Data encoding is mainly used for reducing the number of bit transition over interconnects. In the proposed encoding scheme ii, we make use of both odd as discussed previously and full inversion. Optimizing data encoding technique for dynamic power. The proposed encoding scheme exploits the wormhole switching techniques and works on an endtoend basis.
Bus encoding techniques have been proposed to reduce the energy consumed in highcapacitance buses 2123. In this paper, we propose a new encoding approach aimed at power reduction by decreasing the number of switching activities on the buses. Energyefficient encoding techniques for offchip data buses. In this paper, we present a set of data encoding schemes to reduce the power dissipated by the links of an noc. The proposed approach reduces the average energy consumption of data movement by. Many virtual channels on one input or output port in router are included. Index termscoupling switching activity, data encoding, interconnection on chip, low power, network on chip noc, power analysis. The data encoding scheme is another method that was employed to reducing the link power dissipation. Index termscoupling capacitance, data encoding, low power, network on chip noc, power analysis. Pdf, video, music, text, and picture are used as the workloads are given in f. In this paper, we present a survey of encoding techniques for reducing data movement energy. Bus invert bi, adaptive coding, gray coding and transition method these are the various encoding techniques used in the noc. We have to use another encoding technique in order to transmit high data rates across utp. Data encoding techniques for reducing energy consumption in.
In addition the interconnection has a defect that power consumption is high on the score. By detecting bit transition patterns on a bus, encoding hardware converts data into a lowtransition form stored in a table. Data encoding and data decoding technique for energy consumption for network on chip nxfee innovation vlsi ieee projects. Data encoding techniques, manchester encoding, 8b10b. Dec 12, 2018 nima jafarzadeh, maurizio palesi, ahmad khademzadeh, ali afzalikusha, 2014, data encoding techniques for reducing energy consumption in network on chip, in ieee transactions on very large scale integration vlsi systems, vol. The data encoding techniques are supposed to reduce the power consumption caused by the transitions in the interconnect on chip. However, the router includes five io ports, and then the power issue is very important in virtual channels. Consequently, there may be a second transition at the beginning of the bit interval. Our goal in this work is to further reduce the energy consumption on terminated dram io interfaces by reducing the number of energy expensive 1values. Network on chip noc has been proposed as an appropriate solution for todays onchip communication challenges. Within almost every organization, data center energy consumption has been driven by demand for greater computing capacity and increased it centralization. Finally, the use of currentmode signaling has also been explored, and holds promise, for global onchip interconnects 12. The scheme contrasts the present data and the past one to choose whether odd inversion or no inversion of the present data can prompt the connection power reduction.
In network on chip noc, the data transferring by virtual channels can avoid the issue of data loss and deadlock. Data encoding techniques for reducing energy consumption in network on chip k. These techniques are followed by basing on reducing the number of transitions by taking under consideration different types of transitions within the interconnects. In contrast, training has many distinct data structures, e. Advanced data encoding technique for reducing power. Reducing the energy consumption of networked devices.
Citeseerx data encoding schemes in networks on chip. Data encoding techniques for reducing energy consumption in network on chip nima jafarzadeh, maurizio palesi, member, ieee, ahmad khademzadeh, and ali afzalikusha, senior member, ieee abstractas technology shrinks, the power dissipated by the links of a network on chip noc starts to compete with the. This approach assigns the symbols to data word in such. By classifying the works on key metrics, we bring out their similarities and differences. We are using the data encoding with gray input is mainly reducing the power dissipation on the noc. Theres a growing demand for data centers for running large neural networks, and its becoming increasingly computationally intractable as the demand grows, says coauthor alexander sludds, a graduate student in the research laboratory of. Introduction moving from a silicon innovation hub to the.
Data encoding techniques for lower power dissipation in network. Bus encoding refers to convertingencoding a piece of data to another form before launching on the bus. In addition the interconnection has a defect that power consumption is high on the score of. Implementation of data encoding and decoding architecture for. Data reuse techniques are proposed for reducing amount of computations performed by h. Factors annual pc energy consumption is a function of power levels in each major operating mode usage patterns % of year by mode unit annual energy use the stock of pcs national energy use all factors vary with residential vs. Power efficient encoding techniques for offchip data buses. Index termscoupling switching activity, data encoding, interconnection on chip, low power, networkonchip noc, power analysis. The proposed data encoding schemes are described in section iv. The data encoding scheme is another method that was employed to reduce the link power dissipation.
These include the techniques that make use of shielding 7, 8, increasing linetoline spacing 9, 10, and repeater insertion 11. Reducing power dissipation in network on chip by using data encoding schemes 43 transitions by converting them to type i transition. The proposed coding scheme is applied both to dram interfaces and the main data htree in a last level cache llc for evaluation. Power dissipation has become a key factor in the nocs because of their shrinking sizes. Reducing data movement energy via online data clustering and. Introduction 1every technology has facing some problems like power dissipation, energy consumption problems etc. The data encoding technique in which number of switching transitions in data word is brought down to reduce the power dissipation. As technology shrinks, the power dissipated by the links of a networkonchip noc starts to compete with the power dissipated by the other elements of the communication subsystem, namely, the routers and the network interfaces nis. The proposed schemes are general and transparent with respect to the underlying noc fabrication. Request pdf data encoding techniques for reducing energy consumption in networkonchip as technology shrinks, the power.
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