| /* |
| * Copyright 2023-present Open Networking Foundation |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| * |
| * This Work is contributed by CNR within the B5G-OPEN project. |
| */ |
| |
| package org.onosproject.net; |
| |
| import org.onlab.util.Frequency; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * Utils to manage OCH signal on multiple optical bands. |
| * Given an OCH signal it is mapped in one band. |
| * Start and End frequency for each band can be queried. |
| */ |
| public final class OpticalBandUtils { |
| |
| private static final Logger log = LoggerFactory.getLogger(OpticalBandUtils.class); |
| private static final Frequency L_BAND_START_FREQ = Frequency.ofGHz(184500); |
| private static final Frequency L_BAND_STOP_FREQ = Frequency.ofGHz(191500); |
| private static final Frequency C_BAND_START_FREQ = Frequency.ofGHz(191500); |
| private static final Frequency C_BAND_STOP_FREQ = Frequency.ofGHz(195500); |
| private static final Frequency S_BAND_START_FREQ = Frequency.ofGHz(195500); |
| private static final Frequency S_BAND_STOP_FREQ = Frequency.ofGHz(205300); |
| |
| // prohibit instantiation |
| private OpticalBandUtils() {} |
| /** |
| * Maps the provided OCH signal on optical band type. |
| * |
| * @param ochSignal signal to be mapped |
| * @return OpticalBandType band |
| */ |
| public static OpticalBandType computeOpticalBand(OchSignal ochSignal) { |
| if (L_BAND_START_FREQ.isLessThan(ochSignal.centralFrequency()) |
| && L_BAND_STOP_FREQ.isGreaterThan(ochSignal.centralFrequency())) { |
| return OpticalBandType.L_BAND; |
| } |
| if (C_BAND_START_FREQ.isLessThan(ochSignal.centralFrequency()) |
| && C_BAND_STOP_FREQ.isGreaterThan(ochSignal.centralFrequency())) { |
| return OpticalBandType.C_BAND; |
| } |
| if (S_BAND_START_FREQ.isLessThan(ochSignal.centralFrequency()) |
| && S_BAND_STOP_FREQ.isGreaterThan(ochSignal.centralFrequency())) { |
| return OpticalBandType.S_BAND; |
| } |
| return null; |
| } |
| |
| /** |
| * Return the start frequency of the specified band. |
| * |
| * @param bandType band type to be considered |
| * @return Frequency |
| */ |
| public static Frequency startFrequency(OpticalBandType bandType) { |
| switch (bandType) { |
| case L_BAND: |
| return L_BAND_START_FREQ; |
| case C_BAND: |
| return C_BAND_START_FREQ; |
| case S_BAND: |
| return S_BAND_START_FREQ; |
| default: |
| log.error("Unsupported OpticalBandType {}", bandType); |
| return null; |
| } |
| } |
| |
| /** |
| * Return the end frequency of the specified band. |
| * |
| * @param bandType band type to be considered |
| * @return Frequency |
| */ |
| public static Frequency stopFrequency(OpticalBandType bandType) { |
| switch (bandType) { |
| case L_BAND: |
| return L_BAND_STOP_FREQ; |
| case C_BAND: |
| return C_BAND_STOP_FREQ; |
| case S_BAND: |
| return S_BAND_STOP_FREQ; |
| default: |
| log.error("Unsupported OpticalBandType {}", bandType); |
| return null; |
| } |
| } |
| } |