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Impact of multiple access on uplink scheduling

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3 Author(s)
Rajan, D. ; Dept. of Electr. & Comput. Eng., Rice Univ., Houston, TX, USA ; Sabharwal, A. ; Aazhang, B.

We consider uplink scheduling for bursty traffic. We characterize the achievable rate region for Gaussian multiple access in terms of minimum required powers, with a constraint on average transmission delay for all users. We show that delay and rate constrained, power minimizing schemes perform scheduling accompanied with power control. Further, for the class of randomized stationary schedulers, it is shown that the achievable region is a convex polytope. We highlight that power requirements of a user can be reduced by either allowing additional delay (time scheduling gain) or increasing the power of another user (multiuser power exchange). Results are presented for two user additive white Gaussian noise channel and can be extended to finite state fading channels

Published in:

Information Theory Workshop, 2001. Proceedings. 2001 IEEE

Date of Conference:

2001