TY - GEN
T1 - Channel asymmetry due to cell deployment and service in OFDMA/TDD systems
AU - Kim, Jisu
AU - Chae, Chan Byoung
AU - Cho, Sunghyun
AU - Kim, Jae Hyun
PY - 2011
Y1 - 2011
N2 - This paper studies the channel asymmetric characteristic between a downlink and an uplink channel in orthogonal frequency division multiple access (OFDMA)/time division duplexing (TDD) systems. To investigate the downlink and uplink channel asymmetry, we derive a propagation loss model and a shadowing model taking into consideration geometrical information and inter-cell interference. Then, the channel asymmetric cases are introduced based on the proposed channel models. Numerical results show that the causes of the uplink and downlink channel asymmetry are mainly due to the coverage of neighbor cells and the usage ratio of uplink and downlink traffic. As coverage of neighbor cells increases, an uplink signal to interference and noise ratio (SINR) becomes lower than that of a downlink SINR. In addition, as uplink traffic of mobile stations (MSs) increases, an uplink SINR decreases. increases.
AB - This paper studies the channel asymmetric characteristic between a downlink and an uplink channel in orthogonal frequency division multiple access (OFDMA)/time division duplexing (TDD) systems. To investigate the downlink and uplink channel asymmetry, we derive a propagation loss model and a shadowing model taking into consideration geometrical information and inter-cell interference. Then, the channel asymmetric cases are introduced based on the proposed channel models. Numerical results show that the causes of the uplink and downlink channel asymmetry are mainly due to the coverage of neighbor cells and the usage ratio of uplink and downlink traffic. As coverage of neighbor cells increases, an uplink signal to interference and noise ratio (SINR) becomes lower than that of a downlink SINR. In addition, as uplink traffic of mobile stations (MSs) increases, an uplink SINR decreases. increases.
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U2 - 10.1145/1968613.1968724
DO - 10.1145/1968613.1968724
M3 - Conference contribution
AN - SCOPUS:79956051501
SN - 9781450305716
T3 - Proceedings of the 5th International Conference on Ubiquitous Information Management and Communication, ICUIMC 2011
BT - Proceedings of the 5th International Conference on Ubiquitous Information Management and Communication, ICUIMC 2011
T2 - 5th International Conference on Ubiquitous Information Management and Communication, ICUIMC 2011
Y2 - 21 February 2011 through 23 February 2011
ER -