CN109525909B - Passive optical interconnection network structure - Google Patents

Abstract

The invention relates to a passive optical interconnection network structure. The passive optical interconnection network structure comprises: a two-stage optical switch; the two-stage optical switch receives the read/write request optical signals sent by the N processing elements respectively; exchanging according to the wavelength information in the read/write request optical signal to realize the non-blocking parallel access among the 16 processing elements; n is 4 × 4, 8 × 8, 16 × 16, 32 × 32 or 64 × 64. The invention relates to an on-chip passive optical interconnection network structure, which is suitable for communication of a large-scale multi-core processing element structure and aims to reduce the number of micro-ring resonators, improve access bandwidth, reduce insertion loss and reduce access delay by adopting a wavelength division multiplexing technology and a two-stage optical network switching structure.

Description

Passive optical interconnection network structure

Technical Field

The invention belongs to the technical field of integrated circuit design, and particularly relates to a passive optical interconnection network structure.

Background

With the development of multi-core processors, on-chip optical interconnects have become an important communication fabric. Passive optical interconnects have higher bandwidths, faster speeds, and lower losses compared to electrical interconnects. Integrated chips of photonic components and transistors have been implemented to achieve inter-chip optical communication using photonic devices on the chip to communicate directly with other chips.

The transmission path, optical interconnect network fabric, and reception path of the on-chip optical interconnect network fabric are important components of communication. However, in the conventional active crossed waveguide dual microring resonator optical communication structure, the insertion loss of optical network communication becomes large due to the doubling of the number of microrings. Passive optical communication is currently being proposed in the industry. Therefore, how to realize non-blocking communication between a source processing element and a destination processing element by using a passive optical interconnection network structure becomes a technical problem which needs to be solved currently.

Disclosure of Invention

The invention provides a passive optical interconnection network structure, which solves the problems of blockage and large loss in the large-scale expansion of optical network communication.

In order to achieve the purpose, the invention adopts the main technical scheme that:

embodiments of the present invention are implemented to extend larger scale optical network processing element access to optical network architectures of 4 x 4, 8 x 8 and 16 x 16. The 16 processing elements passive optical interconnection communication realizes non-blocking communication of a large-scale optical network according to resonance wavelength control of the micro-ring resonator and wavelength division multiplexing technology, wavelength allocation is carried out according to different access destination processing elements of the 16 processing elements, and the proposed optical network switching structure realizes switching of different wavelengths, so that non-blocking communication from a source processing element to a destination processing element is achieved.

Specifically, the present invention provides a passive optical interconnection network structure, including: a two-stage optical switch;

the two-stage optical switch receives the read/write request optical signals sent by the N processing elements respectively; exchanging according to the wavelength information in the read/write request optical signal to realize the non-blocking parallel access among the 16 processing elements;

n is 4 × 4, 8 × 8, 16 × 16, 32 × 32 or 64 × 64.

Optionally, each stage of the optical switch includes a plurality of passive microring resonators and a plurality of crossing waveguides;

and a scalable passive microring resonator is used between every two crossed waveguides to complete the control of two-path optical transmission.

Optionally, when N is 16 x 16,

the resonant wavelengths of all passive micro-ring resonators of the first-stage optical switch are as follows: lambda [ alpha ]₀、λ₁、λ₂、λ₃、λ₄、λ₅、λ₆、λ₇For mutual communication between the 0 th to 7 th processing units and the 8 th to 15 th processing units;

specifically, when any one of the 0 th to 7 th processing elements sends out a cluster of lambda by using the wavelength division multiplexing technology₀、λ₁、λ₂、λ₃、λ₄、λ₅、λ₆、λ₇When the wavelength is higher than the preset wavelength, the passive micro-ring resonator resonates the corresponding wavelength from top to bottom and transmits the corresponding wavelength to the 8 th to 15 th processing elements;

or, when any one of the 8 th to 15 th processing elements sends out a cluster of lambda by using the wavelength division multiplexing technology₀、λ₁、λ₂、λ₃、λ₄、λ₅、λ₆、λ₇When the wavelength is higher than the preset wavelength, the passive micro-ring resonator resonates from bottom to top and transmits the corresponding wavelength to the 0 th to the 7 th processing elements;

the resonant wavelength of the passive micro-ring resonator of the second-stage optical switch is as follows: lambda [ alpha ]₈、λ₉、λ₁₀、λ₁₁，λ₁₂、λ₁₃，λ₁₄、λ₁₅For performing internal communication between the 0 th to 7 th processing elements and the 8 th to 15 th processing elements;

specifically, when any one of the 0 th to 7 th processing elements sends out a cluster of lambda by using the wavelength division multiplexing technology₈、λ₉、λ₁₀、λ₁₁，λ₁₂、λ₁₃，λ₁₄、λ₁₅The passive micro-ring resonator transmits the resonant wavelength from top to bottom to the 0 th to the 7 th processing elements;

or, when any one of the 8 th to 15 th processing elements sends out a cluster of lambda by using the wavelength division multiplexing technology₈、λ₉、λ₁₀、λ₁₁，λ₁₂、λ₁₃，λ₁₄、λ₁₅At the wavelength of (4), the passive micro-ring resonator transmits the resonance wavelength from bottom to top to the 8 th to 15 th positionsAnd (6) managing the yuan.

Optionally, the first-stage optical switch and the second-stage optical switch are arranged in parallel, and sixteen input ends of the first-stage optical switch correspond to sixteen processing elements respectively;

sixteen input ends of the second-stage optical switch correspond to sixteen processing elements respectively.

Optionally, the number of the passive microring resonators is 4, which is determined by the passive optical interconnection network structure.

The number of passive micro-ring resonators required for 16 × 16 processing element communication is 64.

In another aspect, the present invention further provides a system on a multi-core processing element, including a plurality of source processing elements and a plurality of destination processing elements, and any one of the passive optical interconnection network structures described above;

the passive optical interconnection network structure realizes non-blocking parallel communication from a source processing element to a target processing element.

The invention has the beneficial effects that:

the invention relates to an on-chip passive optical interconnection network structure, which is suitable for communication of a large-scale multi-core processing element structure and aims to reduce the number of micro-ring resonators, improve access bandwidth, reduce insertion loss and reduce access delay by adopting a wavelength division multiplexing technology and a two-stage optical network switching structure.

The performance of the whole optical network is affected by too many levels of the optical network switching structure, so that the performance is poor.

The invention is characterized in that a two-stage switching structure of the optical switch is adopted, the 4 x 4, 8 x 8 and 16 x 16 passive optical network structures are adopted to expand a larger-scale optical network structure, the communication mode is the two-stage switching structure of the optical switch, conflict-free parallel full access among 16 x 16 processing elements is completed, the number of micro-ring resonators is greatly reduced, the access bandwidth is improved, the insertion loss is reduced, and the access delay is reduced.

Drawings

Fig. 1 is a schematic diagram of an optical link layer structure according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a micro-ring resonator according to an embodiment of the present invention;

fig. 3 is a schematic diagram of a 4 x 4 passive optical interconnection network structure according to an embodiment of the present invention;

fig. 4 is a schematic diagram of an 8 × 8 passive optical interconnection network structure according to an embodiment of the present invention;

fig. 5 is a schematic diagram of a 16 × 16 passive optical interconnect network structure according to an embodiment of the present invention;

fig. 6 is a schematic diagram of a passive optical interconnection network structure provided by an embodiment of the present invention;

fig. 7 is a schematic diagram of wavelength allocation provided by an embodiment of the present invention.

Detailed Description

For the purpose of better explaining the present invention and to facilitate understanding, the present invention will be described in detail by way of specific embodiments with reference to the accompanying drawings.

The passive optical interconnection network is an important structural transmission mode for on-chip optical interconnection, and wavelength division multiplexing technology can realize wavelength synthesis and splitting and meet the expandability of the on-chip optical interconnection network. Passive on-chip optical interconnect networks may have higher bandwidth, faster speed, and lower power consumption. Under the condition of smaller circuit scale, compared with the traditional electric interconnection mode, the optical interconnection advantage is not obvious, but with the further development of the technology, the requirements of larger-scale and more complex communication among circuits on transmission speed, bandwidth, loss and non-blocking transmission are stricter, so the passive optical interconnection network structure is an effective scheme.

The on-chip passive optical interconnection network of the invention is composed of two stages of optical switch switches, and is mainly characterized in that:

the resonance wavelength of the micro-ring resonator of the first-stage optical switch is lambda₀、λ₁、λ₂、λ₃、λ₄、λ₅、λ₆、λ₇Mainly carries out communication from a processing element 0-7 to a processing element 8-15, and from the processing element 8-15 to the processing element 0-7.

Resonant wavelength of micro-ring resonator of second-stage optical switchIs λ₈、λ₉、λ₁₀、λ₁₁，λ₁₂、λ₁₃，λ₁₄、λ₁₅The communication from the 0-7 processing element to the 0-7 processing element is mainly carried out, and the communication from the 8-15 processing element to the 8-15 processing element is carried out.

Description of the working principle

The on-chip passive optical interconnection network structure receives storage access read/write request optical signals from 16 processing elements, and exchanges according to wavelength information in the optical signals to realize non-blocking parallel access among 16 processing element clusters;

the larger scale 32 x 32 and 64 x 64 optical communication structure is expanded for parallel access to the 4 x 4, 8 x 8 and 16 x 16 optical ports. The optical port in this embodiment refers to a processing element port in the passive optical network result, which can perform optical transmission, and is called an optical port.

The scalability of the embodiment is to enable larger-scale inter-processing element communication without blocking, and the passive optical interconnection network structure is simpler.

The detailed design process is as follows:

referring to fig. 1, the passive optical interconnection network for processing inter-element cluster communication of the present invention is composed of two stages of optical switches.

Wherein, the input end I of the first stage optical switch₀ ⁰、I₀ ¹、I₀ ²、I₀ ³、I₀ ⁴、I₀ ⁵、I₀ ⁶、I₀ ⁷、I₀ ⁸、I₀ ⁹、I₀ ¹⁰、I₀ ¹¹、I₀ ¹²、I₀ ¹³、I₀ ¹⁴、I₀ ¹⁵Respectively corresponding to 16 processing elements; treatment elements are labeled PEG0, PEG1, PEG2, PEG3, PEG4, PEG5, PEG6, PEG7, PEG8, PEG9, PEG10, PEG11, PEG12, PEG13, PEG14, PEG15 in fig. 1.

In this embodiment, each processing element may emit a plurality of wavelengths, and the number of wavelengths emitted by each processing element is set according to optical transmission.

A cluster of wavelengths emitted by PEG0 are lambda from top to bottom through a passive micro-ring resonator in the first-stage optical switch₀、λ₁、λ₂、λ₃、λ₄、λ₅、λ₆、λ₇Respectively from the output port O₀ ⁸、O₀ ⁹、O₀ ¹⁰、O₀ ¹¹、O₀ ¹²、O₀ ¹³、O₀ ¹⁴、O₀ ¹⁵Sending out;

a cluster of wavelengths emitted by PEG1 is lambda₇、λ₀、λ₁、λ₂、λ₃、λ₄、λ₅、λ₆Respectively from the output port O₀ ⁸、O₀ ⁹、O₀ ¹⁰、O₀ ¹¹、O₀ ¹²、O₀ ¹³、O₀ ¹⁴、O₀ ¹⁵Sending out;

a cluster of wavelengths emitted by PEG2 is lambda₆、λ₇、λ₀、λ₁、λ₂、λ₃、λ₄、λ₅Respectively from the output port O₀ ⁸、O₀ ⁹、O₀ ¹⁰、O₀ ¹¹、O₀ ¹²、O₀ ¹³、O₀ ¹⁴、O₀ ¹⁵Sending out;

a cluster of wavelengths emitted by PEG3 is lambda₅、λ₆、λ₇、λ₀、λ₁、λ₂、λ₃、λ₄Respectively from the output port O₀ ⁸、O₀ ⁹、O₀ ¹⁰、O₀ ¹¹、O₀ ¹²、O₀ ¹³、O₀ ¹⁴、O₀ ¹⁵Sending out;

the wavelength of a cluster of ports emitting PEG4 is lambda₄、λ₅、λ₆、λ₇、λ₀、λ₁、λ₂、λ₃Respectively from the output port O₀ ⁸、O₀ ⁹、O₀ ¹⁰、O₀ ¹¹、O₀ ¹²、O₀ ¹³、O₀ ¹⁴、O₀ ¹⁵Sending out;

a cluster of wavelengths emitted by PEG5 is lambda₃、λ₄、λ₅、λ₆、λ₇、λ₀、λ₁、λ₂Respectively from the output port O₀ ⁸、O₀ ⁹、O₀ ¹⁰、O₀ ¹¹、O₀ ¹²、O₀ ¹³、O₀ ¹⁴、O₀ ¹⁵Sending out;

a cluster of wavelengths emitted by PEG6 is lambda₂、λ₃、λ₄、λ₅、λ₆、λ₇、λ₀、λ₁Respectively from the output port O₀ ⁸、O₀ ⁹、O₀ ¹⁰、O₀ ¹¹、O₀ ¹²、O₀ ¹³、O₀ ¹⁴、O₀ ¹⁵Sending out;

a cluster of wavelengths emitted by PEG7 is lambda₁、λ₂、λ₃、λ₄、λ₅、λ₆、λ₇、λ₀Respectively from the output port O₀ ⁸、O₀ ⁹、O₀ ¹⁰、O₀ ¹¹、O₀ ¹²、O₀ ¹³、O₀ ¹⁴、O₀ ¹⁵Sending out;

the passive micro-ring resonator in the first-stage optical switch makes a cluster of wavelengths emitted by PEG15 be lambda from left to right₀、λ₁、λ₂、λ₃、λ₄、λ₅、λ₆、λ₇Respectively from the output port O₀ ⁷、O₀ ⁶、O₀ ⁵、O₀ ⁴、O₀ ³、O₀ ²、O₀ ¹、O₀ ⁰Sending out;

a cluster of wavelengths emitted by PEG14 is lambda₇、λ₀、λ₁、λ₂、λ₃、λ₄、λ₅、λ₆Respectively from the output port O₀ ⁷、O₀ ⁶、O₀ ⁵、O₀ ⁴、O₀ ³、O₀ ²、O₀ ¹、O₀ ⁰Sending out;

a cluster of wavelengths emitted by PEG13 is lambda₆、λ₇、λ₀、λ₁、λ₂、λ₃、λ₄、λ₅Respectively from the output port O₀ ⁷、O₀ ⁶、O₀ ⁵、O₀ ⁴、O₀ ³、O₀ ²、O₀ ¹、O₀ ⁰Sending out;

a cluster of wavelengths emitted by PEG12 is lambda₅、λ₆、λ₇、λ₀、λ₁、λ₂、λ₃、λ₄Respectively from output port O₀ ⁷、O₀ ⁶、O₀ ⁵、O₀ ⁴、O₀ ³、O₀ ²、O₀ ¹、O₀ ⁰Sending out;

a cluster of wavelengths emitted by PEG11 is lambda₄、λ₅、λ₆、λ₇、λ₀、λ₁、λ₂、λ₃Respectively from output port O₀ ⁷、O₀ ⁶、O₀ ⁵、O₀ ⁴、O₀ ³、O₀ ²、O₀ ¹、O₀ ⁰Sending out;

a cluster of wavelengths emitted by PEG10 is lambda₃、λ₄、λ₅、λ₆、λ₇、λ₀、λ₁、λ₂Respectively from output port O₀ ⁷、O₀ ⁶、O₀ ⁵、O₀ ⁴、O₀ ³、O₀ ²、O₀ ¹、O₀ ⁰Sending out;

a cluster of wavelengths emitted by PEG9 is lambda₂、λ₃、λ₄、λ₅、λ₆、λ₇、λ₀、λ₁Respectively from output port O₀ ⁷、O₀ ⁶、O₀ ⁵、O₀ ⁴、O₀ ³、O₀ ²、O₀ ¹、O₀ ⁰Sending out;

a cluster of wavelengths emitted by PEG8 is lambda₁、λ₂、λ₃、λ₄、λ₅、λ₆、λ₇、λ₀Respectively from output port O₀ ⁷、O₀ ⁶、O₀ ⁵、O₀ ⁴、O₀ ³、O₀ ²、O₀ ¹、O₀ ⁰And (7) sending out.

The above-mentioned sending-out mode satisfies from top to bottom, from left to right order.

In this embodiment, the first stage optical switch and the second stage optical switch are connected to each processing element.

Input end I of second-stage optical switch₁ ⁰、I₁ ¹、I₁ ²、I₁ ³、I₁ ⁴、I₁ ⁵、I₁ ⁶、I₁ ⁷、I₁ ⁸、I₁ ⁹、I₁ ¹⁰、I₁ ¹¹、I₁ ¹²、I₁ ¹³、I₁ ¹⁴、I₁ ¹⁵And internally accessing the processing elements PEG0, PEG1, PEG2, PEG3, PEG4, PEG5, PEG6, PEG7, PEG8, PEG9, PEG10, PEG11, PEG12, PEG13, PEG14 and PEG15 through the second-stage optical exchange switch.

The passive micro-ring resonator of the second-stage optical switch is used for emitting a cluster of wavelengths lambda from PEG0 from top to bottom₈、λ₉、λ₁₀、λ₁₁、λ₁₂、λ₁₃、λ₁₄、λ₁₅Respectively from output port O₁ ⁷、O₁ ⁶、O₁ ⁵、O₁ ⁴、O₁ ³、O₁ ²、O₁ ¹、O₁ ⁰Sending out;

a cluster of wavelengths emitted by PEG1 is lambda₉、λ₁₀、λ₁₁、λ₁₂、λ₁₃、λ₈、λ₁₅、λ₁₄Respectively from output port O₁ ⁷、O₁ ⁶、O₁ ⁵、O₁ ⁴、O₁ ³、O₁ ²、O₁ ¹、O₁ ⁰Sending out;

a cluster of wavelengths emitted by PEG2 is lambda₁₀、λ₁₁、λ₁₂、λ₁₃、λ₉、λ₁₅、λ₈、λ₁₄Respectively from output port O₁ ⁷、O₁ ⁶、O₁ ⁵、O₁ ⁴、O₁ ³、O₁ ²、O₁ ¹、O₁ ⁰Sending out;

a cluster of wavelengths emitted by PEG3 is lambda₁₁、λ₁₂、λ₁₃、λ₁₀、λ₁₅、λ₉、λ₈、λ₁₄Respectively from output port O₁ ⁷、O₁ ⁶、O₁ ⁵、O₁ ⁴、O₁ ³、O₁ ²、O₁ ¹、O₁ ⁰Sending out;

the wavelength of a cluster of ports emitting PEG4 is lambda₁₂、λ₁₃、λ₁₁、λ₁₅、λ₁₀、λ₉、λ₈、λ₁₄Respectively from output port O₁ ⁷、O₁ ⁶、O₁ ⁵、O₁ ⁴、O₁ ³、O₁ ²、O₁ ¹、O₁ ⁰Sending out;

a cluster of wavelengths emitted by PEG5 is lambda₁₃、λ₁₂、λ₁₅、λ₁₁、λ₁₀、λ₉、λ₈、λ₁₄Respectively from output port O₁ ⁷、O₁ ⁶、O₁ ⁵、O₁ ⁴、O₁ ³、O₁ ²、O₁ ¹、O₁ ⁰Sending out;

a cluster of wavelengths emitted by PEG6 is lambda₁₅、λ₁₃、λ₁₂、λ₁₁、λ₁₀、λ₉、λ₈、λ₁₄Respectively from output port O₁ ⁷、O₁ ⁶、O₁ ⁵、O₁ ⁴、O₁ ³、O₁ ²、O₁ ¹、O₁ ⁰Sending out;

a cluster of wavelengths emitted by PEG7 is lambda₁₅、λ₁₂、λ₁₁、λ₁₀、λ₉、λ₈、λ₁₄Respectively from output port O₁ ⁶、O₁ ⁵、O₁ ⁴、O₁ ³、O₁ ²、O₁ ¹、O₁ ⁰Sending out;

the passive micro-ring resonator of the second-stage optical switch is used for emitting a cluster of wavelengths lambda from PEG15 from bottom to top₈、λ₉、λ₁₀、λ₁₁、λ₁₂、λ₁₃、λ₁₅、λ₁₄Respectively from output port O₁ ⁸、O₁ ⁹、O₁ ¹⁰、O₁ ¹¹、O₁ ¹²、O₁ ¹³、O₁ ¹⁴、O₁ ¹⁵Sending out;

a cluster of wavelengths emitted by PEG14 is lambda₉、λ₁₀、λ₁₁、λ₁₂、λ₁₃、λ₈、λ₁₄、λ₁₅Respectively from the output port O₁ ⁸、O₁ ⁹、O₁ ¹⁰、O₁ ¹¹、O₁ ¹²、O₁ ¹³、O₁ ¹⁴、O₁ ¹⁵Sending out;

a cluster of wavelengths emitted by PEG13 is lambda₁₀、λ₁₁、λ₁₂、λ₁₃、λ₉、λ₁₄、λ8、λ₁₅Respectively from output port O₁ ⁸、O₁ ⁹、O₁ ¹⁰、O₁ ¹¹、O₁ ¹²、O₁ ¹³、O₁ ¹⁴、O₁ ¹⁵Sending out;

a cluster of wavelengths emitted by PEG12 is lambda₁₁、λ₁₂、λ₁₃、λ₁₀、λ₁₄、λ₉、λ₈、λ₁₅Respectively from output port O₁ ⁸、O₁ ⁹、O₁ ¹⁰、O₁ ¹¹、O₁ ¹²、O₁ ¹³、O₁ ¹⁴、O₁ ¹⁵Sending out;

a cluster of wavelengths emitted by PEG11 is lambda₁₂、λ₁₃、λ₁₁、λ₁₄、λ₁₀、λ₉、λ₈、λ₁₅Respectively from output port O₁ ⁸、O₁ ⁹、O₁ ¹⁰、O₁ ¹¹、O₁ ¹²、O₁ ¹³、O₁ ¹⁴、O₁ ¹⁵Sending out;

a cluster of wavelengths emitted by PEG10 is lambda₁₃、λ₁₂、λ₁₄、λ₁₁、λ₁₀、λ₉、λ₈、λ₁₅Respectively from output port O₁ ⁸、O₁ ⁹、O₁ ¹⁰、O₁ ¹¹、O₁ ¹²、O₁ ¹³、O₁ ¹⁴、O₁ ¹⁵Sending out;

a cluster of wavelengths emitted by PEG9 is lambda₁₄、λ₁₃、λ₁₂、λ₁₁、λ₁₀、λ₉、λ₈、λ₁₅Respectively from output port O₁ ⁸、O₁ ⁹、O₁ ¹⁰、O₁ ¹¹、O₁ ¹²、O₁ ¹³、O₁ ¹⁴、O₁ ¹⁵Sending out;

a cluster of wavelengths emitted by PEG8 is lambda₁₄、λ₁₂、λ₁₁、λ₁₀、λ₉、λ₈、λ₁₅Respectively from output port O₁ ⁹、O₁ ¹⁰、O₁ ¹¹、O₁ ¹²、O₁ ¹³、O₁ ¹⁴、O₁ ¹⁵And (7) sending out.

Referring to fig. 2, the micro-ring resonator switch structure in the first stage optical switch and the second stage optical switch is schematically illustrated.

The micro-ring resonator is a key device of an on-chip optical interconnection network and is mainly responsible for coupling, transmission, steering and filtering of optical signals, and different on-chip optical interconnection networks are formed by using different micro-ring resonator structures.

The micro-ring resonators have different transmission modes for corresponding specific wavelength signals, and can be divided into two types, namely active and passive. The active micro-ring resonator realizes configuration of the micro-ring resonator by using modes of heat, voltage and the like, thereby realizing transmission of corresponding specific wavelength signals. The passive micro-ring resonator has different resonant wavelength and active property, and the transmission of the passive micro-ring resonator to a specific wavelength is determined by the structure of the self device and the size radius of the micro-ring.

The structure of the micro-ring resonator switch, Cross in fig. 2 represents that the micro-ring has no resonance state data transmission mode, and I represents₀The transmission path destination is O₁,I₁The transmission path destination is O₀(ii) a Bar state is that the transmitted wavelength is consistent with the resonance wavelength of the micro-ring resonator at the moment, and I is at the moment₀The transmission path is rotated 270 degrees at the micro-ring resonator to reach O₀，I₁The transmission path destination is O₁. The transmission path is selected by the difference of the input wavelength and the difference of the resonance wavelength of the micro-ring resonator.

Referring to fig. 3, fig. 4, and fig. 5, which respectively show passive optical network structures of 4 × 4, 8 × 8, and 16 × 16, the larger-scale optical network structures like 32 × 32 and 64 × 64 can be expanded, and the structure is simple and easy to expand, i.e., larger-scale inter-processor communication can be realized without blocking defects.

Fig. 3 shows 4 × 4 inter-processing element communications, fig. 4 shows 8 × 8 inter-processing element communications, and fig. 5 shows 16 × 16 inter-processing element communications. In fig. 2, the circles at the intersections represent microring resonators, and when the wavelength of light is transmitted to the microring resonators, the direction of light transmission can be changed if the wavelength is the same as the resonant wavelength of the microring resonators. Shown in fig. 3-5 are schematic diagrams of a one-stage optical switch.

Referring to fig. 6, which is a general diagram of a passive optical interconnection network structure of a two-stage optical switch, non-blocking parallel access between 16 processing elements is realized through the wavelength allocation table of fig. 7. In fig. 6, each stage of the optical switch includes a plurality of passive microring resonators.

Through the application of experiments in a dynamic self-reconstruction system structure of an optical interconnection video array processor driven by efficiency, the research of the structure of the reconfigurable array processor for data stream application is carried out, and simulation verification of an OMNET + + platform is carried out, so that the simulation result shows that the design function is completely correct, and all functions and performance indexes meet the requirements, and the aim of the invention is fulfilled.

It should be understood that the above description of specific embodiments of the present invention is only for the purpose of illustrating the technical lines and features of the present invention, and is intended to enable those skilled in the art to understand the contents of the present invention and to implement the present invention, but the present invention is not limited to the above specific embodiments. It is intended that all such changes and modifications as fall within the scope of the appended claims be embraced therein.

Claims (4)

1. A passive optical interconnect network structure, comprising: a two-stage optical switch;

the two-stage optical switch receives the read/write request optical signals sent by the N processing elements respectively; exchanging according to the wavelength information in the read/write request optical signal to realize the non-blocking parallel access among the 16 processing elements;

n is 16 x 16;

each stage of optical switch comprises a plurality of passive micro-ring resonators and a plurality of crossed waveguides;

wherein, an extensible passive micro-ring resonator is used between each two crossed waveguides to complete the control of two-path optical transmission; the transmission of the passive micro-ring resonator to specific wavelength is determined by the structure of the device and the size radius of the micro-ring; selecting a transmission path by the difference of input wavelengths and the difference of micro-ring resonance wavelengths;

when N is 16 x 16, the reaction mixture is,

first order optical switchingThe resonant wavelengths of all passive microring resonators switched are: lambda [ alpha ]₀、λ₁、λ₂、λ₃、λ₄、λ₅、λ₆、λ₇For mutual communication between the 0 th to 7 th processing units and the 8 th to 15 th processing units;

specifically, when any one of the 0 th to 7 th processing elements sends out a cluster of lambda by using the wavelength division multiplexing technology₀、λ₁、λ₂、λ₃、λ₄、λ₅、λ₆、λ₇When the wavelength is higher than the preset wavelength, the passive micro-ring resonator resonates the corresponding wavelength from top to bottom and transmits the corresponding wavelength to the 8 th to 15 th processing elements;

when any one of the 8 th to 15 th processing elements sends out a cluster of lambda by using the wavelength division multiplexing technology₀、λ₁、λ₂、λ₃、λ₄、λ₅、λ₆、λ₇When the wavelength is higher than the preset wavelength, the passive micro-ring resonator resonates from bottom to top and transmits the corresponding wavelength to the 0 th to the 7 th processing elements;

the resonant wavelengths of all passive micro-ring resonators of the second-stage optical switch are as follows: lambda [ alpha ]₈、λ₉、λ₁₀、λ₁₁，λ₁₂、λ₁₃，λ₁₄、λ₁₅For performing internal communication between the 0 th to 7 th processing elements and the 8 th to 15 th processing elements;

specifically, when any one of the 0 th to 7 th processing elements sends out a cluster of lambda by using the wavelength division multiplexing technology₈、λ₉、λ₁₀、λ₁₁，λ₁₂、λ₁₃，λ₁₄、λ₁₅The passive micro-ring resonator transmits the resonant wavelength from top to bottom to the 0 th to the 7 th processing elements;

when any one of the 8 th to the 15 th processing elements sends out a cluster of lambada by using the wavelength division multiplexing technology₈、λ₉、λ₁₀、λ₁₁，λ₁₂、λ₁₃，λ₁₄、λ₁₅When the wavelength is higher than the preset wavelength, the passive micro-ring resonator transmits the resonant wavelength from bottom to top to the 8 th to 15 th processing elements;

the first-stage optical switch and the second-stage optical switch are arranged in parallel, and sixteen input ends of the first-stage optical switch correspond to sixteen processing elements respectively;

sixteen input ends of the second-stage optical switch correspond to sixteen processing elements respectively.

2. A passive optical interconnection network structure according to claim 1,

the number of the passive microring resonators is determined by the structure of the passive optical interconnection network.

3. A passive optical interconnection network structure according to claim 2,

the number of passive micro-ring resonators required for 16 × 16 processing element communication is 64.

4. A multi-core processing element system on chip comprising a plurality of source processing elements and a plurality of destination processing elements, further comprising the passive optical interconnect network structure of any of claims 1 to 3 above;

the passive optical interconnection network structure realizes non-blocking parallel communication from a source processing element to a target processing element.

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