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The traffic of the small cell has a characteristic of the bursty and time varying, it is advantageous to allocate of TDD with a variable DL/UL traffic rate characteristic. However, the existing standard is limitation in the utilization of DL and UL resources, which is considering the instantaneous traffic situation of the cell. With that case, 3GPP standardized TDD eIMTA for supporting the dynamic...
Network densification with small cells deployment is regarded as one of the promising approaches to meet a huge demand of rapidly increasing wireless capacity. Such an approach can lead a dramatic increase of wireless capacity, but the interference issue still exists, which could be even more severe when the cells are too closely placed. This paper proposes an efficient spectrum sharing for a dense...
This paper explores a MAC (Medium Access Control) layer throughput with DCF (Distributed Coordination Function) protocol in the IEEE 802.11a/g/n-based mobile LAN. It is evaluated in Rayleigh fading wireless channel, using theoretical analysis method. The DCF throughput performance is analyzed by using the number of stations with both variable payload size and mobile speed on the condition that fading...
This paper explores a MAC (Medium Access Control) layer throughput with DCF (Distributed Coordination Function) protocol in the IEEE 802.11a/g-based mobile LAN. It is evaluated in both error-free and error-prone wireless channel with the maximum transmission rate of 54 Mbps, using theoretical analysis method. The DCF saturation throughput performance is analyzed by using the number of stations with...
This paper analyzes the effect of RTS (request to send) and CTS (clear to send) frames on the TCP performance and network throughput in the single-hop mobile ad hoc-based wireless LAN. It describes the role of the RTS and CTS frames in avoiding the hidden node problem usually induced by node mobility in wireless LAN, and especially emphasizes whether such avoidance really has a significant impact...
This paper analyzes saturation throughput variation quantitatively over Rayleigh or Ricean fading channels under the CSMA/CA (carrier sense multiple access/collision avoidance)-based DCF (distributed coordination function) protocol at the MAC layer in the 802.11a wireless LAN. We find the fact that when the ratio of direct-to-diffuse signal power is increased, the saturation throughput is increased...
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