Name
Abstract | ||
|---|---|---|
For wireless systems in which randomly arriving devices attempt to transmit a fixed payload to a central receiver, we develop a framework to characterize the system throughput as a function of arrival rate and per-device data rate. The framework considers both coordinated transmission (where devices are scheduled) and uncoordinated transmission (where devices communicate on a random access channel and a provision is made for retransmissions). Our main contribution is a novel characterization of the optimal throughput for the case of uncoordinated transmission and a strategy for achieving this throughput that relies on overlapping transmissions and joint decoding. Simulations for a noise-limited cellular network show that the optimal strategy provides a factor of four improvement in throughput compared with slotted ALOHA. We apply our framework to evaluate more general system-level designs that account for overhead signaling. We demonstrate that, for small payload sizes relevant for machine-to-machine (M2M) communications (200 bits or less), a one-stage strategy, where identity and data are transmitted optimally over the random access channel, can support at least twice the number of devices compared with a conventional strategy, where identity is established over an initial random-access stage and data transmission is scheduled. |
Year | DOI | Venue |
|---|---|---|
2013 | 10.1109/TCOMM.2014.2359222 | IEEE Transactions on Communications |
Keywords | DocType | Volume |
Signal to noise ratio,Throughput,Base stations,Payloads,Frequency division multiaccess,Bandwidth,Performance evaluation | Journal | 62 |
Issue | ISSN | Citations |
11 | 0090-6778 | 41 |
PageRank | References | Authors |
1.78 | 22 | 4 |
Name | Order | Citations | PageRank |
|---|---|---|---|
| Dhillon Harpreet S. | 1 | 3096 | 180.88 |
| Howard C. Huang | 2 | 251 | 34.55 |
| Harish Viswanathan | 3 | 477 | 68.86 |
| Reinaldo A. Valenzuela | 4 | 1642 | 254.84 |