Capacity of Cellular Wireless Network

Vaze, Rahul and Iyer, Srikanth K (2017) Capacity of Cellular Wireless Network. In: 15th International Symposium on Modeling and Optimization in Mobile, Ad Hoc, and Wireless Networks (WiOpt), MAY 15-19, 2017, Paris, FRANCE.

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Abstract

In cellular networks, under ARQ and SINR model of transmission, the effective downlink rate of packet transmission is the reciprocal of the expected delay (number of retransmissions needed till success). We define the cellular network capacity as the ratio of the basestation (BS) density and the expected delay. Exact characterization of this natural and practical but non-trivial (because of SINR temporal correlations) capacity metric is derived. The capacity is shown to first increase polynomially with the BS density and then scale inverse exponentially with the increasing BS density. Two distinct upper bounds are derived that are relevant for the low and the high BS density regimes. A single power control strategy is shown to achieve the upper bounds in both the regimes upto constants. Our result is fundamentally different than the transport and transmission capacity for ad hoc networks that scale as the square root of the (high) BS density. Our results show that the strong temporal correlations of SINRs with PPP distributed BS locations model for cellular networks is limiting, and the realizable capacity is much smaller than previously thought.

Item Type:	Conference Proceedings
Additional Information:	Copy right for this article belongs to the IEEE, 345 E 47TH ST, NEW YORK, NY 10017 USA
Department/Centre:	Division of Physical & Mathematical Sciences > Mathematics
Date Deposited:	17 Nov 2017 04:52
Last Modified:	17 Nov 2017 04:52
URI:	http://eprints.iisc.ac.in/id/eprint/58284

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