Uplink scheduler for cellular packet access

Details Uplink scheduler for cellular packet access Uplink scheduler for cellular packet access

2007-03-26

2010-11-23

Kincaid, Lester (Department: 2617)

Multiplex communications

Communication over free space

Having a plurality of contiguous regions served by...

C455S452200

Reexamination Certificate

active

07839830

ABSTRACT:
A method includes constraining total power received from cellular users accessing a base station through any one of a TDMA access, CDMA access, and a derivation of a TDMA/CDMA access, and scheduling users for access to the base station within the constrained total power in response to an optimization that for each time slot determines a group of time critical cellular users and their transmission power factoring in instantaneous location-dependent channel states and long term quality of service performance. In the preferred embodiment, the optimization includes an iterative solution of an NP-hard Knapsak problem with initialization of maximum transmit power per cellular user inversely proportional to at least one of an activity factor of a cellular user's channel, the cellular user's antenna gain, the instantaneous channel gain of a dedicated uplink channel for the cellular user, and other-cellular user to same-cellular user interference ratio, and directly proportional to total resource power consumption.

REFERENCES:
patent: 6845246 (2005-01-01), Steer
patent: 7158804 (2007-01-01), Kumaran et al.
patent: 2002/0102983 (2002-08-01), Furuskar et al.
Rajkumar et al., 1998, Practical Solutions for QoS-based Resource Allocation Problems, IEEE Real-Time Systems Symposium.

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