Granted Patent B2

US 9,356,726 · App. 14/686,023 · Granted May 31, 2016

Abstract

Claims (286)

1. A method, comprising configuring an optical point to multipoint communication network including

assigning a channel number C i by modulo-N arithmetic to each of a plurality of N access points, each of the plurality of N access points i) including a laser and ii) coupled to a hub having a shared optical receiver; and

tuning the laser located in each of the plurality of N access points to a wavelength λ ui that is one of a set of M wavelengths as a function of the channel number assigned to the access point in which the laser is located, a channel spacing Δλ and an intrinsic wavelength λ uin of the laser to prevent optical beat interference at the shared optical receiver,

wherein the channel number

C i ≡a i (mod N)

wherein a i is a sequential number of the wavelength λ ui and

a

i

=

λ

ui

-

λ

u

⁢

⁢

0

Δ

⁢

⁢

λ

wherein λ u0 is the first wavelength and Δλ is the channel spacing in the set of M wavelengths and Δλ is greater than zero.

2. A method, comprising configuring an optical point to multipoint communication network including

assigning a channel number C i by modulo-N arithmetic to each of a plurality of N access points, each of the plurality of N access points i) including a laser and ii) coupled to a hub having a shared optical receiver; and

tuning the laser located in each of the plurality of N access points to a wavelength λ ui that is one of a set of M wavelengths as a function of the channel number assigned to the access point in which the laser is located, a channel spacing Δλ and an intrinsic wavelength λ uin of the laser to prevent optical beat interference at the shared optical receiver,

wherein the channel number

C i =└|ƒ( a i )|┘(mod N )

wherein ƒ is a monotonically increasing function, └|ƒ(a i )|┘ is integer part of the absolute value of ƒ(a i ) and

wherein a i , is a sequential number of the wavelength λ ui and

a

i

=

λ

ui

-

λ

u

⁢

⁢

0

Δ

⁢

⁢

λ

wherein λ u0 is the first wavelength and Δλ is the channel spacing in the set of M wavelengths and Δλ is greater than zero.

3. A method, comprising configuring an optical point to multipoint communication network including

assigning a channel number C i by modulo-N arithmetic to each of a plurality of N access points, each of the plurality of N access points i) including a laser and ii) coupled to a hub having a shared optical receiver; and

tuning the laser located in each of the plurality of N access points to a wavelength λ ui that is one of a set of M wavelengths as a function of the channel number assigned to the access point in which the laser is located, a channel spacing Δλ and an intrinsic wavelength λ uin of the laser to prevent optical beat interference at the shared optical receiver,

wherein the channel number

C i =└|g ( a i )|┘(mod N )

wherein g is a monotonically decreasing function and └|g(a i )|┘ is integer part of the absolute value of g(a i ) and

wherein a i is a sequential number of the wavelength λ ui and

a

i

=

λ

ui

-

λ

u

⁢

⁢

0

Δ

⁢

⁢

λ

wherein λ u0 is the first wavelength and Δλ is the channel spacing in the set of M wavelengths and Δλ is greater than zero.

4. A method, comprising configuring an optical point to multipoint communication network including

assigning a channel number C i by modulo-N arithmetic to each of a plurality of N access points, each of the plurality of N access points i) including a laser and ii) coupled to a hub having a shared optical receiver; and

tuning the laser located in each of the plurality of N access points to a wavelength λ ui that is one of a set of M wavelengths as a function of the channel number assigned to the access point in which the laser is located, a channel spacing Δλ and an intrinsic wavelength λ uin of the laser to prevent optical beat interference at the shared optical receiver,

wherein the channel number

C i =p N [a i (mod N )]

wherein p N is a cyclic permutation of {0, 1, 2 . . . N-1} and

wherein a i is a sequential number of the wavelength λ ui and

a

i

=

λ

ui

-

λ

u

⁢

⁢

0

Δ

⁢

⁢

λ

wherein λ u0 is the first wavelength and Δλ is the channel spacing in the set of M wavelengths and Δλ is greater than zero.

5. A method, comprising configuring an optical point to multipoint communication network including

assigning a channel number C i by modulo-N arithmetic to each of a plurality of N access points, each of the plurality of N access points i) including a laser and ii) coupled to a hub having a shared optical receiver; and

tuning the laser located in each of the plurality of N access points to a wavelength λ ui that is one of a set of M wavelengths as a function of the channel number assigned to the access point in which the laser is located, a channel spacing λΔ and an intrinsic wavelength λ uin of the laser to prevent optical beat interference at the shared optical receiver,

wherein the channel number

C i =p N [└|ƒ( a i )|┘(mod N )]

wherein p N is a cyclic permutation of {0, 1, 2 . . . N-1} and ƒ is a monotonically increasing function and

wherein a i is a sequential number of the wavelength λ ui and

a

i

=

λ

ui

-

λ

u

⁢

⁢

0

Δ

⁢

⁢

λ

wherein Δλ u0 is the first wavelength and Δλ is the channel spacing in the set of M wavelengths and Δλ is greater than zero.

6. A method, comprising configuring an optical point to multipoint communication network including

assigning a channel number C i by modulo-N arithmetic to each of a plurality of N access pointer each of the plurality of N access points i) including a laser and ii) coupled to a hub having a shared optical receiver; and

tuning the laser located in each of the plurality of N access points to a wavelength λ ui that is one of a set of M wavelengths as a function of the channel number assigned to the access point in which the laser is located, a channel spacing Δλ and an intrinsic wavelength λ uin of the laser to prevent optical beat interference at the shared optical receiver,

wherein the channel number

C i =p N [└|g ( a i )|┘(mod N )]

wherein p N is a cyclic permutation of {0, 1, 2 . . . N-1 } and g is a monotonically decreasing function and

wherein a i is a sequential number of the wavelength λ ui and

a

i

=

λ

ui

-

λ

u

⁢

⁢

0

Δ

⁢

⁢

λ

wherein λ u0 is the first wavelength and Δλ is the channel spacing in the set of M wavelengths and Δλ is greater than zero.

7. An apparatus, comprising: an optical point to multipoint communication network including

a hub including a shared optical receiver; and

a plurality of N access points optically coupled to the hub, each of the plurality of N access points including a laser,

wherein each of the plurality of N access points is assigned a channel number C i by modulo-N arithmetic and

wherein the laser located in each of the plurality of N access points is tuned to a wavelength λ ui that is one of a set of M wavelengths as a function of the channel number assigned to the access point in which the laser is located, a channel spacing Δλ and an intrinsic wavelength λ uin of the laser to prevent optical beat interference at the shared optical receiver,

wherein the channel number

C i ≡a i (mod N)

wherein a i is a sequential number of the wavelength λ ui and

a

i

=

λ

ui

-

λ

u

⁢

⁢

0

Δ

⁢

⁢

λ

wherein λ u0 is the first wavelength and Δλ is the channel spacing in the set of M wavelengths and Δλ is greater than zero.

8. An apparatus, comprising: an optical point to multipoint communication network including

a hub including a shared optical receiver; and

a plurality of N access points optically coupled to the hub, each of the plurality of N access points including a laser,

wherein each of the plurality of N access points is assigned a channel number C i by modulo-N arithmetic and

wherein the laser located in each of the plurality of N access points is tuned to a wavelength λ ui that is one of a set of M wavelengths as a function of the channel number assigned to the access point in which the laser is located, a channel spacing Δλ and an intrinsic wavelength λ uin of the laser to prevent optical beat interference at the shared optical receiver,

wherein the channel number

C i =└|ƒ( a i )|┘(mod N )

wherein ƒ is a monotonically increasing function, └|ƒ(a i )|┘is integer part of the absolute value of ƒ(a i ) and

wherein a i is a sequential number of the wavelength λ ui and

a

i

=

λ

ui

-

λ

u

⁢

⁢

0

Δ

⁢

⁢

λ

wherein λ u0 is the first wavelength and Δλ is the channel spacing in the set of M wavelengths and Δλ is greater than zero.

9. An apparatus, comprising: an optical point to multipoint communication network including

a hub including a shared optical receiver; and

a plurality of N access points optically coupled to the hub, each of the plurality of N access points including a laser,

wherein each of the plurality of N access points is assigned a channel number C i by modulo-N arithmetic and

wherein the laser located in each of the plurality of N access points is tuned to a wavelength λ ui that is one of a set of M wavelengths as a function of the channel number assigned to the access point in which the laser is located, a channel spacing Δλ and an intrinsic wavelength λ uin of the laser to prevent optical beat interference at the shared optical receiver,

wherein the channel number

C i =└|g ( a i )|┘(mod N )

wherein g is a monotonically decreasing function and └|g(a i )|┘ is integer part of the absolute value of g(a i ) and

wherein a i is a sequential number of the wavelength λ ui and

a

i

=

λ

ui

-

λ

u

⁢

⁢

0

Δ

⁢

⁢

λ

wherein λ u0 is the first wavelength and Δλ is the channel spacing in the set of M wavelengths and Δλ is greater than zero.

10. An apparatus, comprising: an optical point to multipoint communication network including

a hub including a shared optical receiver; and

a plurality of N access points optically coupled to the hub, each of the plurality of N access points including a laser,

wherein each of the plurality of N access points is assigned a channel number C i by modulo-N arithmetic and

wherein the laser located in each of the plurality of N access points is tuned to a wavelength λ ui that is one of a set of M wavelengths as a function of the channel number assigned to the access point in which the laser is located, a channel spacing Δλ and an intrinsic wavelength λ uin of the laser to prevent optical beat interference at the shared optical receiver,

wherein the channel number

C i =p N [a i (mod N )]

wherein p N is a cyclic permutation of {0, 1, 2 . . . N-1} and

wherein a i is a sequential number of the wavelength λ ui and

a

i

=

λ

ui

-

λ

u

⁢

⁢

0

Δ

⁢

⁢

λ

wherein λ u0 is the first wavelength and Δλ is the channel spacing in the set of M wavelengths and Δλ is greater than zero.

11. An apparatus, comprising: an optical point to multipoint communication network including

a hub including a shared optical receiver; and

a plurality of N access points optically coupled to the hub, each of the plurality of N access points including a laser,

wherein each of the plurality of N access points is assigned a channel number C i by modulo-N arithmetic and

wherein the laser located in each of the plurality of N access points is tuned to a wavelength λ ui that is one of a set of M wavelengths as a function of the channel number assigned to the access point in which the laser is located, a channel spacing Δλ and an intrinsic wavelength λ uin of the laser to prevent optical beat interference at the shared optical receiver,

wherein the channel number

C i =p N [└|ƒ( a i )|┘(mod N )]

wherein p N is a cyclic permutation of {0, 1, 2 . . . N-1 } and ƒ is a monotonically increasing function and

wherein a i is a sequential number of the wavelength λ ui and

a

i

=

λ

ui

-

λ

u

⁢

⁢

0

Δ

⁢

⁢

λ

wherein λ u0 is the first wavelength and Δλ is the channel spacing in the set of M wavelengths and Δλ is greater than zero.

12. An apparatus, comprising: an optical point to multipoint communication network including

a hub including a shared optical receiver; and

a plurality of N access points optically coupled to the hub, each of the plurality of N access points including a laser,

wherein each of the plurality of N access points is assigned a channel number C i by modulo-N arithmetic and

wherein the laser located in each of the plurality of N access points is tuned to a wavelength λ ui that is one of a set of M wavelengths as a function of the channel number assigned to the access point in which the laser is located a channel spacing Δλ and an intrinsic wavelength λ uin of the laser to prevent optical beat interference at the shared optical receiver,

wherein the channel number

C i =p N [└|g ( a i )|┘(mod N )]

wherein p N is a cyclic permutation of {0, 1, 2 . . . N-1} and g is a monotonically decreasing function and

wherein a i is a sequential number of the wavelength λ ui and

a

i

=

λ

ui

-

λ

u

⁢

⁢

0

Δ

⁢

⁢

λ

wherein λ u0 is the first wavelength and Δλ is the channel spacing in the set of M wavelengths and Δλ is greater than zero.

Assignments (13)