Methods and systems for frequency and time division access

• US 7,672,232 B2
• Filed: 03/23/2005
• Issued: 03/02/2010
• Est. Priority Date: 11/07/2003
• Status: Expired due to Fees

• Current Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Original Assignee: Sharp Laboratories of America Incorporated (Hon Hai Precision Industry Co., Ltd.)
• Inventors: Ayyagari, Deepak, Chan, Wai-Chung
• Primary Examiner(s): Rao; Seema S
• Assistant Examiner(s): CHAN, SAI MING
• Application Number:
  US11/089,759
• Publication Number:
  US 20050169307A1
• Time in Patent Office: 1,805 Days
• Field of Search: 370/468, 370/230, 370/235, 370/395.41, 370/458
• US Class Current: 370/230
• CPC Class Codes: H04L 2012/2843 Mains power line
• CPC Class Codes: H04L 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT
• CPC Class Codes: H04L 5/0039 Frequency-contiguous, i.e. with no allocation of frequencies for one user or terminal between the frequencies allocated to another
• CPC Class Codes: H04L 5/0041 Frequency-non-contiguous
• CPC Class Codes: H04L 5/0046 Determination of how many bits are transmitted on different sub-channels
• CPC Class Codes: H04W 16/14 Spectrum sharing arrangements between different networks
• CPC Class Codes: H04W 28/16 Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
• CPC Class Codes: H04W 48/08 Access restriction or access information delivery, e.g. discovery data delivery signalling during connection H04W76/00
• CPC Class Codes: H04W 74/08 Non-scheduled access, e.g. ALOHA hybrid access H04W74/02
• CPC Class Codes: H04W 8/005 Discovery of network devices, e.g. terminals

Abstract

Embodiments of the present invention comprise methods and systems for managing and allocating bandwidth in a communication medium.

Claims

1. A method for partitioning bandwidth in a communication medium with a scheduler, said method comprising:

a) dividing bandwidth into a plurality of tone groups;

b) dividing said tone groups into time slots;

c) estimating a Bit Loading Estimate (BLE) for each of said tone groups;

d) determining Basic Usage Patterns (BUPs) for a device pair, wherein said determining BUPs is performed by a BUP processor comprising a processor and a memory;

e) searching for BUP combinations that will provide sufficient bandwidth to fulfill a request for said device pair;

f) if said searching is successful,

i) calculating the number of tone-slot units required to satisfy said request for each of said combinations, when the tone groups are allocated in order of highest to lowest BLE,

ii) selecting a final combination, from among said combinations, that uses the lowest number of tone-slot units, and

iii) allocating said final combination to said request;

g) if said searching for BUP combinations is not successful,

i) determining Derived Usage Patterns (DUPs) for said BUPs, by anding one or more BUPs, wherein said determining DUPs is performed by a DUP processor comprising a processor and a memory;

ii) estimating a Bit Loading Estimate (BLE) for each of said DUPs;

iii) searching for DUP combinations that will provide sufficient bandwidth to fulfill said request for said device pair;

iv) if said searching for DUP combinations is successful,

(1) calculating the number of tone-slot units required to satisfy said request for each of said combinations, when the tone groups are allocated in order of highest to lowest BLE,

(2) selecting a final DUP combination, from among said DUP combinations, that uses the lowest number of tone-slot units;

(3) allocating said final DUP combination to said request.