Method and system for providing multiple classes of services in dense wavelength division multiplexing optical networks

A method for providing multiple classes of services on a communication platform through a Wavelength Division Multiplexing optical network, the optical network having a plurality of user terminals connected thereto, the method comprising:

• selecting a predetermined group of light channels;
• partitioning one or more subsets of light channels from the selected predetermined group of light channels based on the light channels' wavelengths;
• and
• orthogonally modulating each light channel by a predetermined set of orthogonal codes, wherein the orthogonally modulating includes:
• partitioning the predetermined set of orthogonal codes into an even number group having all even numbered codes of the predetermined set and an odd number group having all odd numbered codes of the predetermined set;
• assigning the even number group to a first orthogonal code processor for modulating a first light channel;
• assigning the odd number group to a second orthogonal code processor for modulating a second light channel that is a first immediate neighboring channel to the first light channel;
• and
• re-assigning the even number group to a third orthogonal code processor for modulating a third light channel that is a second immediate neighboring channel of the second light channel, but not an immediate neighboring channel of the first light channel,
• wherein the modulated light channels are isolated from each other, and wherein each partitioned subset of light channels is used for supporting a class of service on the optical network.

A method for isolating a light channel from its neighboring light channels in a Wavelength Division Multiplexing optical network, the method comprising the steps of:

• partitioning a predetermined set of orthogonal codes into an even number group having all even numbered codes of the predetermined set and an odd number group having all odd numbered codes of the predetermined set;
• assigning the even number group to a first orthogonal code processor for modulating a first light channel;
• assigning the odd number group to a second orthogonal code processor for modulating a second light channel that is a first immediate neighboring channel to the first light channel;
• and
• re-assigning the even number group to a third orthogonal code processor for modulating a third light channel that is a second immediate neighboring channel of the second light channel, but not an immediate neighboring channel of the first light channel.

A method for providing multiple classes of services on a communication platform through a Wavelength Division Multiplexing optical network, the optical network having a plurality of user terminals connected thereto and a predetermined group of light channels, the method comprising:

• selecting a first subset of light channels from the predetermined group of light channels for providing video communication services;
• selecting a second subset of light channels from the predetermined group of light channels for providing audio communication services;
• selecting a third subset of light channels from the predetermined group of light channels for providing data communication services;
• and
• orthogonally modulating each light channel by a predetermined set of orthogonal codes, wherein orthogonally modulating includes:
• partitioning a set of orthogonal codes into first and second groups of codes;
• assigning the first group for modulating a first light channel;
• assigning the second group for modulating a second light channel that is a first immediate neighboring channel to the first light channel;
• and
• re-assigning the first group for modulating a third light channel that is a second immediate neighboring channel of the second light channel, but not an immediate neighboring channel of the first light channel,
• wherein the selection of the first, second, and third subsets of light channels are based on their corresponding wavelengths.

A method for providing multiple classes of services on a communication platform through a Wavelength Division Multiplexing optical network, the optical network having a plurality of user terminals connected thereto and a predetermined group of light channels, the method comprising:

• selecting a first subset of light channels from the predetermined group of light channels for providing video communication services;
• selecting a second subset of light channels from the predetermined group of light channels for providing audio communication services;
• selecting a third subset of light channels from the predetermined group of light channels for providing data communication services;
• and
• orthogonally modulating each light channel by a predetermined set of orthogonal codes, wherein orthogonally modulating includes:
• partitioning the predetermined set of orthogonal codes into an even number group having all even numbered codes of the predetermined set and an odd number group having all odd numbered codes of the predetermined set;
• assigning the even number group to a first orthogonal code processor for modulating a first light channel;
• assigning the odd number group to a second orthogonal code processor for modulating a second light channel that is a first immediate neighboring channel to the first light channel;
• and
• re-assigning the even number group to a third orthogonal code processor for modulating a third light channel that is a second immediate neighboring channel of the second light channel, but not an immediate neighboring channel of the first light channel,
• wherein the modulated light channels are isolated from each other, and wherein the selection of the first, second, and third subsets of light channels are based on their corresponding wavelengths.

A system for providing multiple classes of services on a communication platform through a Wavelength Division Multiplexing optical network, the system comprising:

• a predetermined group of light channels selected from the optical network;
• a plurality of user terminals connected to the optical network;
• means for partitioning one or more subsets of light channels from the predetermined group of light channels based on the light channels' wavelengths;
• and
• means for selecting a predetermined set of orthogonal codes shared by the predetermined group of light channels in the optical network;
• means for indicating that orthogonal codes from the selected predetermined set of orthogonal codes are available or unavailable;
• means for enabling each user terminal to monitor an availability of the orthogonal codes;
• means for enabling each user terminal to select an available orthogonal code;
• and
• means for orthogonally modulating each light channel using the selected available orthogonal code,
• wherein each partitioned subset of light channels are used for supporting a class of communication services on the optical network.

A system for providing multiple classes of services on a communication platform through a Wavelength Division Multiplexing optical network, the system comprising:

• a predetermined group of light channels selected from the optical network;
• a plurality of user terminals connected to the optical network;
• means for partitioning one or more subsets of light channels from the predetermined group of light channels based on the light channels' wavelengths;
• and
• means for orthogonally modulating each light channel by a predetermined set of orthogonal codes, wherein the means for orthogonally modulating includes:
• means for partitioning the predetermined set of orthogonal codes into an even number group having all even numbered codes of the predetermined set and an odd number group having all odd numbered codes of the predetermined set;
• means for assigning the even number group to a first orthogonal code processor for modulating a first light channel;
• means for assigning the odd number group to a second orthogonal code processor for modulating a second light channel that is a first immediate neighboring channel to the first light channel;
• and
• means for re-assigning the even number group to a third orthogonal code processor for modulating a third light channel that is a second immediate neighboring channel of the second light channel, but not an immediate neighboring channel of the first light channel,
• wherein the modulated light channels are isolated from each other, and wherein each partitioned subset of light channels are used for supporting a class of communication services on the optical network.