Comparison of Strategies for Signaling of Scheduling Assignments in Wireless OFDMA
2010 (English)In: IEEE Transactions on Vehicular Technology, ISSN 0018-9545, E-ISSN 1939-9359, Vol. 59, no 9, 4527-4542 p.Article in journal (Refereed) Published
This paper considers transmission of scheduling information in OFDMA-based cellular communication systems such as 3GPP long-term evolution (LTE). These systems provide efficient usage of radio resources by allowing users to be scheduled dynamically in both frequency and time. This requires considerable amounts of scheduling information to be sent to the users. The paper compares two basic transmission strategies: transmitting a separate scheduling message to each user versus broadcasting a joint scheduling message to all users. Different scheduling granularities are considered, as well as different scheduling algorithms. The schemes are evaluated in the context of the LTE downlink using multiuser system simulations, assuming a full-buffer situation. The results show that separate transmission of the scheduling information requires a slightly lower overhead than joint broadcasting, when proportional fair scheduling is employed and the users are spread out over the cell area. The results also indicate that the scheduling granularity standardized for LTE provides a good trade-off between scheduling granularity and overhead.
Place, publisher, year, edition, pages
IEEE , 2010. Vol. 59, no 9, 4527-4542 p.
Control signaling, resource allocation in wireless OFDMA, signaling of scheduling assignments, signaling overhead
Engineering and Technology
IdentifiersURN: urn:nbn:se:liu:diva-58156DOI: 10.1109/TVT.2010.2066589ISI: 000284087700029OAI: oai:DiVA.org:liu-58156DiVA: diva2:337825
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Reza Moosavi, Jonas Eriksson, Erik G. Larsson, Niclas Wiberg, Pål Frenger and Fredrik Gunnarsson, Comparison of Strategies for Signaling of Scheduling Assignments in Wireless OFDMA, 2010, IEEE Transactions on Vehicular Technology.