Simultaneous Connections Routing in Wavelength–Space–Wavelength Elastic Optical Switches
In this paper, we investigate the three-stage, wavelength–space–wavelength switching fabric architecture for nodes in elastic optical networks. In general, this switching fabric has r input and output switches with wavelength-converting capabilities and one center-stage space switch that does not ch...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2023-03-01
|
| Series: | Sensors |
| Subjects: | |
| Online Access: | https://www.mdpi.com/1424-8220/23/7/3615 |
| _version_ | 1797606908286205952 |
|---|---|
| author | Enass Abuelela Mariusz Żal Wojciech Kabaciński |
| author_facet | Enass Abuelela Mariusz Żal Wojciech Kabaciński |
| author_sort | Enass Abuelela |
| collection | DOAJ |
| description | In this paper, we investigate the three-stage, wavelength–space–wavelength switching fabric architecture for nodes in elastic optical networks. In general, this switching fabric has r input and output switches with wavelength-converting capabilities and one center-stage space switch that does not change the spectrum used by a connection. This architecture is most commonly denoted by the WSW1 (<i>r</i>, <i>n</i>, <i>k</i>) switching network. We focus on this switching fabric serving simultaneous connection routing. Such routing takes place mostly in synchronous packet networks, where packets for switching arrive at the inputs of a switching network at the same time. Until now, only switching fabrics with up to three inputs and outputs have been extensively investigated. Routing in switching fabrics of greater capacity is estimated based on routing in switches with two or three inputs and outputs. We now improve the results for the switching fabrics with four inputs and outputs and use these results to estimate routing in the switching fabric with an arbitrary number of inputs and outputs. We propose six routing algorithms based on matrix decomposition for simultaneous connection routing. For the proposed routing algorithms, we derive criteria under which they always succeed. The proposed routing algorithms allow the construction of nonblocking switching fabrics with a lower number of wavelength converters and the reduction of the overall switching fabric cost. |
| first_indexed | 2024-03-11T05:24:29Z |
| format | Article |
| id | doaj.art-0e44906dce1a49efb42dceb0bf9c1511 |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-03-11T05:24:29Z |
| publishDate | 2023-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-0e44906dce1a49efb42dceb0bf9c15112023-11-17T17:35:11ZengMDPI AGSensors1424-82202023-03-01237361510.3390/s23073615Simultaneous Connections Routing in Wavelength–Space–Wavelength Elastic Optical SwitchesEnass Abuelela0Mariusz Żal1Wojciech Kabaciński2Institute of Communication and Computer Networks, Faculty of Computing and Telecommunication, Poznan University of Technology, 60-965 Poznan, PolandInstitute of Communication and Computer Networks, Faculty of Computing and Telecommunication, Poznan University of Technology, 60-965 Poznan, PolandInstitute of Communication and Computer Networks, Faculty of Computing and Telecommunication, Poznan University of Technology, 60-965 Poznan, PolandIn this paper, we investigate the three-stage, wavelength–space–wavelength switching fabric architecture for nodes in elastic optical networks. In general, this switching fabric has r input and output switches with wavelength-converting capabilities and one center-stage space switch that does not change the spectrum used by a connection. This architecture is most commonly denoted by the WSW1 (<i>r</i>, <i>n</i>, <i>k</i>) switching network. We focus on this switching fabric serving simultaneous connection routing. Such routing takes place mostly in synchronous packet networks, where packets for switching arrive at the inputs of a switching network at the same time. Until now, only switching fabrics with up to three inputs and outputs have been extensively investigated. Routing in switching fabrics of greater capacity is estimated based on routing in switches with two or three inputs and outputs. We now improve the results for the switching fabrics with four inputs and outputs and use these results to estimate routing in the switching fabric with an arbitrary number of inputs and outputs. We propose six routing algorithms based on matrix decomposition for simultaneous connection routing. For the proposed routing algorithms, we derive criteria under which they always succeed. The proposed routing algorithms allow the construction of nonblocking switching fabrics with a lower number of wavelength converters and the reduction of the overall switching fabric cost.https://www.mdpi.com/1424-8220/23/7/3615three-stage switching networkrearrangeable switching networkconnection routingelastic optical network |
| spellingShingle | Enass Abuelela Mariusz Żal Wojciech Kabaciński Simultaneous Connections Routing in Wavelength–Space–Wavelength Elastic Optical Switches Sensors three-stage switching network rearrangeable switching network connection routing elastic optical network |
| title | Simultaneous Connections Routing in Wavelength–Space–Wavelength Elastic Optical Switches |
| title_full | Simultaneous Connections Routing in Wavelength–Space–Wavelength Elastic Optical Switches |
| title_fullStr | Simultaneous Connections Routing in Wavelength–Space–Wavelength Elastic Optical Switches |
| title_full_unstemmed | Simultaneous Connections Routing in Wavelength–Space–Wavelength Elastic Optical Switches |
| title_short | Simultaneous Connections Routing in Wavelength–Space–Wavelength Elastic Optical Switches |
| title_sort | simultaneous connections routing in wavelength space wavelength elastic optical switches |
| topic | three-stage switching network rearrangeable switching network connection routing elastic optical network |
| url | https://www.mdpi.com/1424-8220/23/7/3615 |
| work_keys_str_mv | AT enassabuelela simultaneousconnectionsroutinginwavelengthspacewavelengthelasticopticalswitches AT mariuszzal simultaneousconnectionsroutinginwavelengthspacewavelengthelasticopticalswitches AT wojciechkabacinski simultaneousconnectionsroutinginwavelengthspacewavelengthelasticopticalswitches |