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US 2026/0143265 A1Published application
Channel bandwidth allocation method to increase effective roadm dwdm network capacity
AssigneeAT&T Intellectual Property I, L.P.
InventorGuodong Zhang
Life of this patent
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Abstract
Aspects of the subject disclosure may include, for example, channel bandwidth allocation to increase effective reconfigurable optical add-drop multiplexer (ROADM) dense wavelength-division multiplexing (DWDM) network capacity. One or more aspects of the subject disclosure may include a method to allocate channel bandwidth efficiently by eliminating one or more guard bands (thereby increasing the usable ROADM DWDM network bandwidth). Other embodiments are disclosed.
Claims20
A method, comprising:
- storing in a database information related to a reconfigurable optical add-drop multiplexer (ROADM) dense wavelength-division multiplexing (DWDM) system, resulting in stored information, wherein the stored information reserves a plurality of frequency bands, each frequency band of the plurality of frequency bands comprising one or more frequency slots, each frequency band of the plurality of frequency bands corresponding to a particular optical path of a plurality of optical paths in the ROADM DWDM system;
- receiving a first traffic demand for a first channel (CH1), wherein CH1 has a first one of the plurality of optical paths;
- assigning a first frequency to CH1 with a first required channel bandwidth, wherein the first frequency corresponds to a particular frequency band of one of the plurality of optical paths, and wherein guard bands are added to both sides of CH1;
- updating the database with updated information indicative of the assigning of the first frequency to CH1, resulting in stored updated information;
- receiving a second traffic demand for a second channel (CHx);
- determining whether CHx has the optical path of CH1, resulting in a first determination;
- responsive to the first determination being that CHx has the optical path of CH1, assigning a second frequency to CHx with a second required channel bandwidth, wherein the second frequency corresponds to the particular frequency band of the optical path of CH1, wherein a guard band associated with CH1 that would have otherwise been between CH1 and CHx is removed and the bandwidth is instead used by CHx, and wherein a guard band is added to a side of CHx that has no adjacent channel;
- and
- updating the database with further updated information indicative of the assigning of the second frequency to CHx, resulting in stored further updated information.
6 more elements
A method, comprising:
- storing in a database information related to a reconfigurable optical add-drop multiplexer (ROADM) dense wavelength-division multiplexing (DWDM) system, resulting in stored information, wherein the stored information reserves a plurality of frequency bands, wherein each frequency band of the plurality of frequency bands comprises one or more frequency slots, wherein each frequency band of the plurality of frequency bands corresponds to a particular optical path of a plurality of optical paths in the ROADM DWDM system, wherein the stored information is indicative of an assigning of a first frequency to a first channel (CH1) that has a first one of the plurality of optical paths, wherein CH1 has a first required channel bandwidth, wherein the first frequency corresponds to a particular frequency band of one of the plurality of optical paths, and wherein guard bands had been added to both sides of CH1;
- receiving a traffic demand for a second channel (CHx);
- responsive to a first determination being that CHx has the optical path of CH1, assigning a second frequency to CHx with a second required channel bandwidth, wherein the second frequency corresponds to the particular frequency band of the optical path of CH1, wherein a guard band associated with CH1 that would have otherwise been between CH1 and CHx is removed and the bandwidth is instead used by CHx;
- updating the database with updated information indicative of the assigning of the second frequency to CHx, resulting in stored updated information;
- receiving another traffic demand for a third channel (CHy);
- responsive to a second determination being that CHy has the optical path of CH1, assigning a third frequency to CHy with a third required channel bandwidth, wherein the third frequency corresponds to the particular frequency band of the optical path of CH1, wherein another guard band associated with CH1 that would have otherwise been between CH1 and CHy is removed and the bandwidth is instead used by CHy;
- and
- updating the database with further updated information indicative of the assigning of the third frequency to CHy, resulting in stored further updated information.
5 more elements
A method, comprising:
- storing in a database information related to a reconfigurable optical add-drop multiplexer (ROADM) dense wavelength-division multiplexing (DWDM) system, resulting in stored information, wherein the stored information reserves a plurality of frequency bands, wherein each frequency band of the plurality of frequency bands comprises one or more frequency slots, wherein each frequency band of the plurality of frequency bands corresponds to a particular optical path of a plurality of optical paths in the ROADM DWDM system, wherein the stored information is indicative of an assigning of a first frequency to a first channel (CH1) that has a first one of the plurality of optical paths, wherein CH1 has a first required channel bandwidth, wherein the first frequency corresponds to a particular frequency band of one of the plurality of optical paths, and wherein guard bands had been added to both sides of CH1;
- receiving a traffic demand for a second channel (CHx);
- responsive to a first determination being that CHx has the optical path of CH1, assigning a second frequency to CHx with a second required channel bandwidth, wherein the second frequency corresponds to the particular frequency band of the optical path of CH1, wherein a guard band associated with CH1 that would have otherwise been between CH1 and CHx is removed and the bandwidth is instead used by CHx;
- updating the database with updated information indicative of the assigning of the second frequency to CHx, resulting in stored updated information;
- receiving another traffic demand for a third channel (CHy);
- responsive to a second determination being that CHy does not have the optical path of CH1, assigning a third frequency to CHy with a third required channel bandwidth, wherein the third frequency corresponds to another frequency band that is not part of the optical path of CH1, and wherein a guard band is added to each side of CHy that has no adjacent channel;
- and
- updating the database with additional updated information indicative of the assigning of the third frequency to CHy, resulting in stored additional updated information.
5 more elements
Dependencies are inferred from the claim text.