Papers and Talks

Toshihisa Ozawa

Papers and talks in Japanese are here.

Submitted papers

Working papers (arXiv)

  1. T. Ozawa, Exact asymptotics of the stationary tail probabilities in an arbitrary direction in a two-dimensional discrete-time QBD process (2023). arXiv:2301.02434
  2. T. Ozawa, Asymptotic property of the occupation measures in a two-dimensional skip-free Markov-modulated random walk (2020). arXiv:2001.00700
  3. T. Ozawa, Stability of multidimensional skip-free Markov modulated reflecting random walks: Revisit to Malyshev and Menshikov's results and application to queueing networks (2015). arXiv:1208.3043
  4. T. Ozawa, Positive recurrence and transience of a two-station network with server states (2013). arXiv:1308.6104

Refereed papers

  1. T. Ozawa, Tail Asymptotics in any direction of the stationary distribution in a two-dimensional discrete-time QBD process, Queueing Systems (2022). View-only version of the paper (Springer Nature SharedIt link), DOI: 10.1007/s11134-022-09860-w (Springer Link);
  2. T. Ozawa, Asymptotic properties of the occupation measure in a multidimensional skip-free Markov-modulated random walk, Queueing Systems 97 (2021), 125-161. DOI: 10.1007/s11134-020-09673-9 (Springer Link)
  3. T. Ozawa, Stability condition of a two-dimensional QBD process and its application to estimation of efficiency for two-queue models, Performance Evaluation 130 (2019), 101-118. DOI: 10.1016/j.peva.2018.11.004 (ScienceDirect).
  4. T. Ozawa and M. Kobayashi, Exact asymptotic formulae of the stationary distribution of a discrete-time two-dimensional QBD process, Queueing Systems 90 (2018), 351-403. DOI:10.1007/s11134-018-9586-x (Springer Link).
  5. T. Ozawa, Asymptotics for the sojourn time distribution in the queue defined by a general QBD Process with a countable phase space, Queueing Systems 76 (2014), 73-103. DOI: 10.1007/s11134-013-9359-5 (Springer Link).
  6. T. Ozawa, Asymptotics for the stationary distribution in a discrete-time two-dimensional quasi-birth-and-death process, Queueing Systems 74 (2013), 109-149. DOI: 10.1007/s11134-012-9323-9 (Springer Link).
  7. T. Ozawa, Sojourn Time Distributions in the Queue Defined by a General QBD Process, Queueing Systems 53(4) (2006), 203-211. DOI:10.1007/s11134-006-7651-3 (Springer Link).
  8. R. Kawahara, K. Ishibashi, T. Mori, T. Ozawa, and T. Abe, Method of Bandwidth Dimensioning and Management for Aggregated TCP Flows with Heterogeneous Access Links, IEICE Trans. Commun. E88-B(12) (2005), 4605-4615.
  9. T. Ozawa, N. Takahashi, and Y. Takahashi, Bounds for Call Completion Probabilities in Large-Scale Mobile Communication Networks, Journal of the Operations Research Society of Japan 47(4) (2004), 339-358.
  10. T. Ozawa, Analysis of queues with Markovian Service Processes, Stochastic Models 20(4) (2004), 391-413.
  11. T. Takahashi, T. Ozawa, and Y. Takahashi, Bounds of performance measures in large-scale mobile communication networks, Performance Evaluation 54(3) (2003), 263-283.
  12. K. Ishibashi, T. Kimura, and T. Ozawa, A measurement-based performance evaluation method for IP networks and its implementation, Telecommunications System 15 (2000), 203-215.
  13. R. Kawahara and T. Ozawa, A simple and efficient ABR control algorithm for large-scale networks, Electronics and Communications in Japan - Part 1, 83(9) (2000), 44-56.
  14. T. Ozawa, Performance characteristics of a packet-based leaky-bucket algorithm for ATM networks, IEICE Trans. Commun. E82-B(1) (1999), 305-308 .
  15. T. Ozawa and T. Asaka, Analysis of a dynamic assignment queueing model with Poisson cluster arrival processes, Journal of the Operations Research Society of Japan 41(2) (1998), 196-213 .
  16. K. Kihara and T. Ozawa: A selective cell discarding scheme using packet-size information, Electrics and Communications in Japan - Part 1, 81(11) (1998), 48-57.
  17. T. Ozawa, Waiting time distribution in a two-queue model with mixed exhaustive and gated-type K-limited services, Performance and Management of Complex Communication Networks, T. Hasegawa, H. Takagi and Y. Takahashi (Eds.), Chapman & Hall (1998), 233-252.
  18. T. Ozawa, Approximate distribution of processor utilization and design of an overload detection scheme for SPC switching systems, IEICE Trans. Commun. E75-B(12) (1992), 1287-1291 .
  19. T. Ozawa, Analysis of a multiqueue model for an ISDN access interface, Performance Evaluation 15(1992), 65-76 .
  20. T. Ozawa, Alternating service queues with mixed exhaustive and K-limited services, Performance Evaluation 11 (1990), 165-175 .
  21. T. Ozawa, Analysis of a single server model with two queues having different service disciplines, Electrics and Communications in Japan - Part 3, 74(3) (1990), 18-27. (pdf file: 1.8MB)

Talks

  1. T. Ozawa, Positive recurrence of multidimensional reflecting random walk with a background process, INFORMS International 2012, Beijing, China, June 24-27, 2012.
  2. T. Ozawa, Asymptotics for the stationary distribution in a discrete-time two-dimensional QBD process with a common background process, The 16th INFORMS Applied Probability Society Conference, Stockholm, Sweden, July 6-8, 2011.
  3. T. Ozawa, Sojourn Time Distribution of the Queue defined on a QBD Process , The 13th INFORMS Applied Probability Society Conference, Ottawa, Canada, July 6-8, 2005.
  4. T. Ozawa, A Simple Queueing Model for Analyzing Optimal Packet Flow Control, The 11th INFORMS Applied Probability Society Conference, New York City, USA, July 25-27, 2001.
  5. T. Ozawa, Marginal waiting cost in optimization based flow control, INFORMS, Seoul (2000).

Return