Multiplex communications – Communication over free space – Having a plurality of contiguous regions served by...
Reexamination Certificate
2005-08-02
2005-08-02
Pham, Chi (Department: 2667)
Multiplex communications
Communication over free space
Having a plurality of contiguous regions served by...
C370S437000, C370S468000
Reexamination Certificate
active
06925068
ABSTRACT:
An adaptive time division duplexing (ATDD) method and apparatus for duplexing transmissions on a communication link in wireless communication systems. Communication link efficiency is enhanced by dynamically adapting to the uplink and downlink bandwidth requirements of the communication channels. Time slots are flexibly and dynamically allocated for uplink or downlink transmissions depending upon the bandwidth needs of a channel. Communication link bandwidth requirements are continuously monitored using sets of pre-determined bandwidth requirement parameters. Communication channels are configured to have either symmetric or asymmetric uplink/downlink bandwidths depending upon the needs of the channel. Channel bandwidth asymmetry can be configured alternatively in favor of the uplink transmissions.(i.e., more time slots are allocated for uplink transmissions than for downlink transmissions) or in favor of the downlink transmissions (i.e., more time slots are allocated for downlink transmissions than for uplink transmissions). A myriad of time slot allocation schemes are possible. One simplified time slot allocation scheme uses a “frame-based” approach. A preferred channel bandwidth analysis technique is disclosed which monitors and updates bandwidth requirement parameters associated with communication sessions, base stations and cell cluster controllers. In accordance with this technique, a communication session is preferably assigned both an “initial” and an “actual” set of bandwidth parameters.
REFERENCES:
patent: 5297144 (1994-03-01), Gilbert et al.
patent: 5444696 (1995-08-01), Petranovich
patent: 5444698 (1995-08-01), Kito
patent: 5479447 (1995-12-01), Chow et al.
patent: 5506848 (1996-04-01), Drakopoulos et al.
patent: 5592470 (1997-01-01), Rudrapatna et al.
patent: 5594720 (1997-01-01), Papadopoulos et al.
patent: 5615212 (1997-03-01), Ruszczyk et al.
patent: 5638371 (1997-06-01), Raychaudhuri et al.
patent: 5638374 (1997-06-01), Heath
patent: 5640395 (1997-06-01), Hamalainen et al.
patent: 5675573 (1997-10-01), Karol et al.
patent: 5677909 (1997-10-01), Heide
patent: 5710762 (1998-01-01), Petranovich
patent: 5729531 (1998-03-01), Raith et al.
patent: 5751708 (1998-05-01), Eng et al.
patent: 5953344 (1999-09-01), Dail et al.
patent: 5956330 (1999-09-01), Kerns
patent: 5956642 (1999-09-01), Larsson et al.
patent: 6016311 (2000-01-01), Gilbert et al.
patent: 6031827 (2000-02-01), Rikkinen et al.
patent: 6047189 (2000-04-01), Yun et al.
patent: 6049551 (2000-04-01), Hinderks et al.
patent: 6052594 (2000-04-01), Chuang et al.
patent: 6094421 (2000-07-01), Scott
patent: 6097733 (2000-08-01), Basu et al.
patent: 6137787 (2000-10-01), Chawla et al.
patent: 6249526 (2001-06-01), Loukianov
patent: 0507384 (1992-03-01), None
patent: 0845916 (1997-12-01), None
patent: 0891060 (1998-06-01), None
patent: WO9222162 (2002-12-01), None
ULM, et al. “Data-Over-Cable Interface Specifications, Radio Frequency Interface Specification”, Hewlett Packard Interim Specification, Doc. Control No.: SP-RFII01-970321, published Mar. 21, 1997 by MCNS Holdings, L.P., Section 6 (“Media Access Control Specification”), pp. 43-85, Yes, Publication in the English Language.
Sampei, et al., “Adaptive Modulation/TDMA Scheme for Personal Multi-Media Communication Systems”, Proceedings of the Global Telecommunications Conference, U.S., New York, IEEE, Nov. 28, 1994, pp. 989-993.
Ue, et al., “Symbol Rate and Modulation Level Controlled Adaptive Modulation/TDMA/TDD for Personal Communication Systems”, Proceedings of the Vehicular Technology Conference, U.S., New York, IEEE, vol. Conf. 45, Jul. 25, 1995, pp. 306-310.
Gilbert Sheldon L.
Klein Israel Jay
Mollenauer James F.
Stanwood Kenneth L.
Campbel Richard E.
Ly Anh-Vu
Pham Chi
Procopio Cory Hargreaves & Savitch LLP
Wi-Lan Inc.
LandOfFree
Method and apparatus for allocating bandwidth in a wireless... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for allocating bandwidth in a wireless..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for allocating bandwidth in a wireless... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3459993