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- Peter Värbrand, Di Yuan, Patrik Björklund
- INFOCOM
- 2003

Wireless communications using ad hoc networks are receiving an increasing interest. The most attractive feature of ad hoc networks is the flexibility. The network is set up by a number of units in an ad hoc manner, without the need of any fixed infrastructure. Communication links are established between two units if the signal strength is sufficiently high.… (More)

- Iana Siomina, Di Yuan
- IEEE Trans. Wireless Communications
- 2012

System-centric modeling and analysis are of key significance in planning and optimizing cellular networks. In this paper, we provide a mathematical analysis of performance modeling for LTE networks. The system model characterizes the coupling relation between the cell load factors, taking into account non-uniform traffic demand and interference between the… (More)

- Chin Keong Ho, Di Yuan, Lei Lei, Sumei Sun
- IEEE Trans. Wireless Communications
- 2015

We consider the problem of minimization of sum transmission energy in cellular networks where coupling occurs between cells due to mutual interference. The coupling relation is characterized by the signal-to-interference-and-noise-ratio (SINR) coupling model. Both cell load and transmission power, where cell load measures the average level of resource usage… (More)

- Kaj Holmberg, Mikael Rönnqvist, Di Yuan
- European Journal of Operational Research
- 1999

Facility location problems are often encountered in many areas such as distribution, transportation and telecommunication. We describe a new solution approach for the capacitated facility location problem in which each customer is served by a single facility. An important class of heuristic solution methods for these problems are Lagrangian heuristics which… (More)

- Kaj Holmberg, Di Yuan
- Networks
- 2004

- Patrik Björklund, Peter Värbrand, Di Yuan
- Ad Hoc Networks
- 2004

An ad hoc network can be set up by a number of units without the need of any permanent infrastructure. Two units establish a communication link, if the channel quality is sufficiently high. As not all pairs of units can establish direct links, the traffic between two units may have to be relayed through other units. This is known as the multi-hop… (More)

- Chin Keong Ho, Di Yuan, Sumei Sun
- IEEE Trans. Wireless Communications
- 2014

We provide a general framework for the problem of data offloading in a heterogeneous wireless network, where some demand of cellular users is served by a complementary network. The complementary network is either a small-cell network that shares the same resources as the cellular network, or a WiFi network that uses orthogonal resources. For a given demand… (More)

- Kaj Holmberg, Di Yuan
- Operations Research
- 2000

- Iana Siomina, Peter Värbrand, Di Yuan
- IEEE Wireless Commun.
- 2006

- Kaj Holmberg, Di Yuan
- INFORMS Journal on Computing
- 2003