alessio | 7da4443 | 2023-04-03 17:11:58 +0200 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2023-present Open Networking Foundation |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | * |
| 16 | * This Work is contributed by CNR within the B5G-OPEN project. |
| 17 | */ |
| 18 | |
| 19 | package org.onosproject.net; |
| 20 | |
| 21 | import org.onlab.util.Frequency; |
| 22 | import org.slf4j.Logger; |
| 23 | import org.slf4j.LoggerFactory; |
| 24 | |
| 25 | /** |
| 26 | * Utils to manage OCH signal on multiple optical bands. |
| 27 | * Given an OCH signal it is mapped in one band. |
| 28 | * Start and End frequency for each band can be queried. |
| 29 | */ |
| 30 | public final class OpticalBandUtils { |
| 31 | |
| 32 | private static final Logger log = LoggerFactory.getLogger(OpticalBandUtils.class); |
| 33 | private static final Frequency L_BAND_START_FREQ = Frequency.ofGHz(184500); |
| 34 | private static final Frequency L_BAND_STOP_FREQ = Frequency.ofGHz(191500); |
| 35 | private static final Frequency C_BAND_START_FREQ = Frequency.ofGHz(191500); |
| 36 | private static final Frequency C_BAND_STOP_FREQ = Frequency.ofGHz(195500); |
| 37 | private static final Frequency S_BAND_START_FREQ = Frequency.ofGHz(195500); |
| 38 | private static final Frequency S_BAND_STOP_FREQ = Frequency.ofGHz(205300); |
| 39 | |
| 40 | // prohibit instantiation |
| 41 | private OpticalBandUtils() {} |
| 42 | /** |
| 43 | * Maps the provided OCH signal on optical band type. |
| 44 | * |
| 45 | * @param ochSignal signal to be mapped |
| 46 | * @return OpticalBandType band |
| 47 | */ |
| 48 | public static OpticalBandType computeOpticalBand(OchSignal ochSignal) { |
| 49 | if (L_BAND_START_FREQ.isLessThan(ochSignal.centralFrequency()) |
| 50 | && L_BAND_STOP_FREQ.isGreaterThan(ochSignal.centralFrequency())) { |
| 51 | return OpticalBandType.L_BAND; |
| 52 | } |
| 53 | if (C_BAND_START_FREQ.isLessThan(ochSignal.centralFrequency()) |
| 54 | && C_BAND_STOP_FREQ.isGreaterThan(ochSignal.centralFrequency())) { |
| 55 | return OpticalBandType.C_BAND; |
| 56 | } |
| 57 | if (S_BAND_START_FREQ.isLessThan(ochSignal.centralFrequency()) |
| 58 | && S_BAND_STOP_FREQ.isGreaterThan(ochSignal.centralFrequency())) { |
| 59 | return OpticalBandType.S_BAND; |
| 60 | } |
| 61 | return null; |
| 62 | } |
| 63 | |
| 64 | /** |
| 65 | * Return the start frequency of the specified band. |
| 66 | * |
| 67 | * @param bandType band type to be considered |
| 68 | * @return Frequency |
| 69 | */ |
| 70 | public static Frequency startFrequency(OpticalBandType bandType) { |
| 71 | switch (bandType) { |
| 72 | case L_BAND: |
| 73 | return L_BAND_START_FREQ; |
| 74 | case C_BAND: |
| 75 | return C_BAND_START_FREQ; |
| 76 | case S_BAND: |
| 77 | return S_BAND_START_FREQ; |
| 78 | default: |
| 79 | log.error("Unsupported OpticalBandType {}", bandType); |
| 80 | return null; |
| 81 | } |
| 82 | } |
| 83 | |
| 84 | /** |
| 85 | * Return the end frequency of the specified band. |
| 86 | * |
| 87 | * @param bandType band type to be considered |
| 88 | * @return Frequency |
| 89 | */ |
| 90 | public static Frequency stopFrequency(OpticalBandType bandType) { |
| 91 | switch (bandType) { |
| 92 | case L_BAND: |
| 93 | return L_BAND_STOP_FREQ; |
| 94 | case C_BAND: |
| 95 | return C_BAND_STOP_FREQ; |
| 96 | case S_BAND: |
| 97 | return S_BAND_STOP_FREQ; |
| 98 | default: |
| 99 | log.error("Unsupported OpticalBandType {}", bandType); |
| 100 | return null; |
| 101 | } |
| 102 | } |
| 103 | } |