Chi-Tao Chiang

Learn More
This paper investigates the downlink burst allocation problem in IEEE 802.16 OFDMA system. In order to increase the subchannel utilization and to improve the network throughput, a channel-aware renumbering (CSR) scheme and a channel-aware downlink burst allocation (CDBA) scheme are proposed in this paper. CSR considers the difference among(More)
The paper investigates the downlink burst scheduling problem (BSP) in IEEE 802.16 OFDMA systems. To solve the problem, a subchannel-aware burst fragmentation, packing and scheduling (BFPS) algorithm is proposed to schedule the position of each burst with high subchannel utilization and low DL-MAP overhead. BFPS is composed of the burst allocation scheme,(More)
Burst is an atomic bandwidth allocation unit in IEEE 802.16 OFDMA systems. Due to the satisfaction of the rectangular mapping constraint in the downlink allocations, bandwidth called OFDMA slots may be over-allocated, resulting in the wastage of the downlink bandwidth. In order to alleviate the wastage of downlink bandwidth, this paper proposes a Burst(More)
In IEEE 802.16m networks, each frame is divided into eight advanced air interface (AAI) subframes, composed of Logical Resource Units (LRUs). According to stations' requirements, advanced base stations (ABSs) allocate bursts constructed by contiguous LRUs to stations. If ABSs can not efficiently schedule and allocate bursts, bandwidth resource will be(More)
  • 1