Multiplex communications – Communication over free space – Combining or distributing information via code word channels...
Reexamination Certificate
2003-05-13
2009-10-13
Edouard, Patrick N (Department: 2617)
Multiplex communications
Communication over free space
Combining or distributing information via code word channels...
C370S442000, C455S452200
Reexamination Certificate
active
07602760
ABSTRACT:
The invention includes several embodiments for slot assignment in code division multiple access communication systems. Some of the embodiments relate to fixed beams and others relate to adaptive arrays. One embodiment for fixed beams assigns slots by first detecting a beam having the best received quality and selected the best slot from that beam. Another fixed beam embodiment determines the best slot or slots in a number of beams and determines the overall best beam/slot combination. Another fixed beam embodiment uses a modified interference factor. One embodiment for the uplink using adaptive arrays using a spatial analysis stage followed by a transmission power level estimation stage. An overall interference level associated with each slot is determined and a slot having the best overall quality is determined. Another embodiment for the downlink uses the spatial analysis and slot assignment of the uplink for the downlink. Another embodiment for the downlink uses a spatial and transmission power level estimation stages. For adaptive arrays, the slot assignment can be determined whether the pathloss for each user is estimated or not and whether signals from each user are received or not.
REFERENCES:
patent: 5355522 (1994-10-01), Demange
patent: 5533013 (1996-07-01), Leppanen
patent: 6212384 (2001-04-01), Almgreen et al.
patent: 6356771 (2002-03-01), Dent
patent: 6360077 (2002-03-01), Mizoguchi
patent: 6408169 (2002-06-01), Pallonen
patent: 6453176 (2002-09-01), Lopes et al.
patent: 6498934 (2002-12-01), Muller
patent: 7065383 (2006-06-01), Hovers et al.
patent: 2001/0004604 (2001-06-01), Toshimitsu et al.
patent: 2002/0015393 (2002-02-01), Pan et al.
patent: 2002/0077068 (2002-06-01), Dent
patent: 2002/0101908 (2002-08-01), Kim et al.
patent: 2002/0115474 (2002-08-01), Yoshino et al.
patent: 19820736 (1999-09-01), None
patent: 0841826 (1998-05-01), None
patent: 0865172 (1998-09-01), None
patent: 1087630 (2001-03-01), None
patent: 2320648 (1998-06-01), None
patent: 07-193857 (1995-07-01), None
patent: 09-074375 (1997-03-01), None
patent: 2001-238250 (2001-08-01), None
patent: 2001238252 (2001-08-01), None
Toro Inoue et al 2001 IEEE (0-7803-6728-6/01) DS-CDMA and Adaptive Modulation Based TDMA Dual Mode Scheme for High Speed Data Transmission Service in Wireless Multimedia Communication Systems.
Essam Sourour, “Time Slot Assignment Techniques for TDMA Digital Cellular Systems,” IEEE Transactions on Vehicular Technology, vol. 43, No. 1, Feb. 1994, pp. 121-127.
Hitoshi Takanashi, Tomoyoski Oono & Toshiaki Tanaka, “Frequency-Segregated Dynamic Channel Allocation for Asynchronized TDMA/TDD Frame Among Base Stations,” IEEE, 1996, pp. 933-937.
Mihailescu C. et al., Dynamic Resource Allocation for Packet Transmission in UTMS TDD-CDMA Systems:, Vehicular Technology Conference, 1999 IEEE 49thHouston, TX, USA May 16-20, 1999, Piscataway, NJ, USA IEEE, US, pp. 1737-1741, XP010342115, ISBN: 0-7803-5565-2.
Yoshitaka Hara, Toshihisa Nabetani & Shinsuke Hara, “Time Slot Assignment for Cellular SDMA/TDMA Systems with Antenna Arrays,” YRP Mobile Telecommunications Key Technology Research Laboratories Co., Ltd., pp. 1-4, IEEE conference May 6, 2001.
Thit Minn & Kai-Yeung Siu, “Dynamic Assignment of Orthogonal Variable-Spreading-Factor Codes in W-CDMA,” IEEE, 2000, pp. 1429-1439.
Edouard Patrick N
InterDigital Technology Corporation
Thier Michael T
Volpe and Koenig P.C.
LandOfFree
Resource allocation to users in slotted code division... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Resource allocation to users in slotted code division..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Resource allocation to users in slotted code division... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4111198