BONDING ADJACENT TV BANDS, SUB-CARRIER ALLOCATION, DATA BURST DEFINITION AND SPREAD OFDMA IN A PHYSICAL LAYER FOR 802.22 WRAN COMMUNICATION SYSTEMS

• US 20090323610A1
• Filed: 09/21/2007
• Published: 12/31/2009
• Est. Priority Date: 09/26/2006
• Status: Abandoned Application

• Current Assignee: Koninklijke Philips Electronics N.V. (Koninklijke Philips N.V.)
• Original Assignee: Koninklijke Philips Electronics N.V. (Koninklijke Philips N.V.)
• Inventors: Birru, Dagnachew, Gaddam, Vasanth R.
• Application Number:
  US12/441,610
• Publication Number:
  US 20090323610A1
• Time in Patent Office: Days
• US Class Current: 370/329
• CPC Class Codes: H04L 27/0006 Assessment of spectral gaps suitable for allocating digitally modulated signals, e.g. for carrier allocation in cognitive radio for spectrum sharing between different networks H04W16/14
• CPC Class Codes: H04L 5/023 Multiplexing of multicarrier modulation signals multicarrier modulation H04L27/2601
• CPC Class Codes: H04W 16/10 Dynamic resource partitioning
• CPC Class Codes: H04W 16/14 Spectrum sharing arrangements between different networks

Abstract

A method and system of calculating debt service capacity of a loan applicant includes capturing, indexing, reclassifying and grouping transaction data and profile data of the loan applicant. Next, capturing a loan structure, risk factors, financial variables and reconciliation rules and finally using the aforementioned and loan applicants'"'"' data and cash flow projections to calculate loan applicants'"'"' debt service capacity with time value of money calculations.

Claims

1. A WRAN communication system (800) based on a superframe (900), comprising:

at least one WRAN cell (801) including;

a base station (BS) (700) to manage the WRAN cell (801), and

at least one consumer premise equipment (CPE) (600) managed by the BS (700); and

a PHY layer based on said superframe (900) including a channel bonding by said base station (700) to dynamically bond up to three adjacent empty TV channels such that an FFT period is kept constant while a corresponding FFT size varies with the number of channels bonded,

wherein, said BS (700) dynamically adjusts said channel bonding and reallocates said sub-carriers based on instantaneous channel occupancy by incumbents thereof and communicates said adjustment and reallocation to said at least one CPE (600) in said superframe (900) simultaneously transmitted across all bands of said dynamically bonded TV channels.

2. The system (800) of claim 1, wherein the PHY layer further comprises a scalable and dynamic sub-carrier allocation including:

a sub-channel definition for said bonded channels; and

a pilot and data carrier allocation within a sub-channel,

wherein, the sub-carrier allocation is distributed across all bands of said bonded channels to achieve frequency diversity.

3. The system (800) of claim 2, wherein the PHY layer further comprises a data burst definition having each data burst (500.i) sub-divided into data blocks (500.i.j) and each block of encoded data mapped and transmitted in a single sub-channel.

4. The system (800) of claim 3, wherein the PHY layer further comprises a spread OFDMA modulation such that a symbol block comprises 16 symbols and is spread by a 16×

16 matrix, and a data block comprises 3 said symbol blocks.

5. The system (800) of claim 4, wherein the at least one CPE (600) is allocated at least one sub-channel by the BS (700) based on the communication requirements of the at least one CPE (600).

6. The system (800) of claim 5, wherein a pilot is mapped using QPSK constellation mapping and spreading is not used on a pilot.

7. The system (800) of claim 6, wherein the spreading matrix is a Hadamard spreading matrix.

8. The system (800) of claim 7, wherein for a first mode each channel has 32-sub-channels, and for a second mode and a third mode, the number of sub-channels is 64 and 96 respectively each sub-channel having 48 data sub-carriers and 6 pilot sub-carriers.

9. A method for providing a PHY layer in a WRAN communication system (800) based on a superframe (900), comprising the steps of:

providing at least one WRAN cell (801) including a base station (BS) (700) to manage the WRAN cell (801) and at least one consumer premise equipment (CPE) (600) managed by the BS (700); and

providing a PHY layer based on said superframe (900) by said BS (700) performing the steps of;

is allocated at least one sub-channel by the BS (700) based on the communication requirements of the CPE (600) dynamically bonding a number of up to three adjacent empty TV channels such that an FFT period is kept constant while a corresponding FFT size varies with the number of channels bonded;

allocating sub-carriers of each said bonded channels in a scalable and dynamic manner such that the allocated sub-carriers are distributed across all bands of said bonded channels to achieve frequency diversity, by performing the steps of—

defining sub-channels across said bonded channels,

allocating pilot and data carriers within said defined sub-channels,

dynamically adjusting said number of bonded channels and reallocating said sub-carriers based on instantaneous channel occupancy by incumbents thereof; and

communicating said adjusted number of bonded channels and reallocated sub-carriers to said at least one CPE (600) in said superframe (900) simultaneously transmitted across all bands of said dynamically adjusted and bonded TV channels.

10. The method of claim 9, wherein the provided PHY layer further comprises a scalable and dynamic sub-carrier allocation including:

a sub-channel definition for said bonded channels; and

a pilot and data carrier allocation within a sub-channel,

wherein, the sub-carrier allocation is distributed across all bands of said bonded channels to achieve frequency diversity.

11. The method of claim 10, wherein the provided PHY layer further comprises a data burst definition where each data burst (500.i) is sub-divided into data blocks (500.i.j) and each block of encoded data is mapped and transmitted on a single sub-channel.

12. The method of claim 11, wherein the provided PHY layer further comprises a spread OFDMA modulation such that a symbol block comprises 16 symbols and is spread by a 16×

16 matrix, and a data block comprises 3 said symbol blocks,

13. The method of claim 12, further comprising the step of BS (700) allocating the at least one CPE (600) at least one sub-channel based on the communication requirements of the at least one CPE (600).

14. The method of claim 13, further comprising the step of mapping a pilot using QPSK constellation mapping such that spreading is not used on a pilot.

15. The method of claim 14, wherein the spreading matrix is a Hadamard spreading matrix.

16. The method of claim 15, wherein for a first mode each channel has 32-sub-channels, and for a second mode and a third mode, the number of sub-channels is 64 and 96 respectively each sub-channel having 48 data sub-carriers and 6 pilot sub-carriers.

17. A consumer premise equipment (CPE) (600) managed by a base station (BS) (700) for a WRAN communication system (800) based on a superframe (900), comprising:

a PHY layer based on said superframe (900) including a dynamic channel bonding mechanism, a scalable and dynamic sub-carrier allocation scheme, a data burst definition, and a spread OFDMA modulation;

a receiver (601) comprising a processing module (601.1) to receive from said base station (700) and store in a bonding memory 604 said superframe (900) simultaneously transmitted across all bands of said dynamically bonded TV channels—

a dynamic channel bonding of up to three adjacent empty TV channels such that an FFT period is kept constant while a corresponding FFT size varies with the number of channels bonded, and

a scalable and dynamic sub-carrier allocation including—

a. a sub-channel definition for said bonded channels, and

b. a pilot and data carrier allocation within a sub-channel, such that the sub-carrier allocation is distributed across all bands of said dynamic channel bonding to achieve frequency diversity;

a transmitter (602) comprising a processing module (602.1) using the PHY layer having a data burst (500.i) sub-divided into data blocks (500.i.j) such that each block of encoded data is mapped and transmitted thereby in a single sub-channel,

wherein, the spread OFDMA modulation employed by said transmitter (601) and said receiver (602) uses a symbol block definition comprising 16 symbols that is spread by a 16×

16 matrix, and a data block comprises 3 said symbol blocks.

18. The CPE (600) of claim 17, wherein the CPE (600) is allocated at least one sub-channel by the BS (700) based on the communication requirements of the CPE (600).

19. The CPE (600) of claim 18, wherein a pilot is mapped using QPSK constellation mapping and spreading is not used on a pilot.

20. The CPE (600) of claim 19, wherein the spreading matrix is a Hadamard spreading matrix.

21. The CPE (600) of claim 20, wherein for a first mode each channel has 32-sub-channels, and for a second mode and a third mode, the number of sub-channels is 64 and 96 respectively each sub-channel having 48 data sub-carriers and 6 pilot sub-carriers.

22. A base station (BS) (700) to manage as WRAN cell (801) including at least one consumer premise equipment (CPE) (600) for a WRAN communication system (800) based on a superframe (900), comprising:

a PHY layer based on said superframe (900) including a dynamic channel bonding mechanism, a scalable and dynamic sub-carrier allocation scheme, a data burst definition, and a spread OFDMA modulation;

a transmitter module (702) to format and transmit said superframe (900) simultaneously across all bands of said dynamically bonded TV channels said superframe (900) including

a dynamic channel bonding of up to three adjacent empty TV channels such that an FFT period is kept constant while a corresponding FFT size varies with the number of channels bonded, and

a scalable and dynamic sub-carrier allocation including—

a. a sub-channel definition for said bonded channels, and

b. a pilot and data carrier allocation within a sub-channel, such that the sub-carrier allocation is distributed across all bands of said dynamic channel bonding to achieve frequency diversity,

 

wherein the at least one CPE (700) is allocated at least one sub-channel by the BS (700) based on a communication requirement of the at least one CPE (600); and

a receiver module (701) using the PHY layer to receive a superframe (900) that include the communication requirement of the at least one CPE (700),

wherein, the spread OFDMA modulation employed by said transmitter (601) and said receiver (602) uses a symbol block definition comprising 16 symbols that is spread by a 16×

16 matrix, and a data block comprises 3 said symbol blocks.

23. The BS (700) of claim 22, wherein a pilot is mapped using QPSK constellation mapping and spreading is not used on a pilot.

24. The BS (700) of claim 23, wherein the 16×

16 matrix is a Hadamard spreading matrix.

25. The BS (700) of claim 24, wherein for a first mode each channel has 32-sub-channels, and for a second mode and a third mode, the number of sub-channels is 64 and 96 respectively each sub-channel having 48 data sub-carriers and 6 pilot sub-carriers.