TY - JOUR
T1 - Dynamic Time-Frequency Division Duplex
AU - Mohammadkhani Razlighi, Mohsen
AU - Zlatanov, Nikola
AU - Popovski, Petar
PY - 2020/5
Y1 - 2020/5
N2 - In this paper, we introduce dynamic time-frequency-division duplex (D-TFDD), which is a novel duplexing scheme that combines time-division duplex (TDD) and frequency-division duplex (FDD). In D-TFDD, a user receives from the base station (BS) on the downlink in one frequency band and transmits to the BS on the uplink in another frequency band, as in FDD. Next, the user shares its uplink transmission (downlink reception) on the corresponding frequency band with the uplink transmission or the downlink reception of another user in a D-TDD fashion. Hence, in a given frequency band, the BS communicates with user 1 (U1) and user 2 (U2) in a D-TDD fashion. The proposed D-TFDD scheme does not require inter-cell interference (ICI) knowledge and only requires channel state information (CSI) of the local BS-U1 and BS-U2 channels. Thereby, it is practical for implementation. The proposed D-TFDD scheme increases the throughput region between the BS and the two users in a given frequency band, and significantly decreases the outage probabilities on the corresponding BS-U1 and BS-U2 channels. Most importantly, the proposed D-TFDD scheme doubles the diversity gain on both the corresponding BS-U1 and the BS-U2 channels compared to the diversity gain of existing duplexing schemes, which results in very large performance gains.
AB - In this paper, we introduce dynamic time-frequency-division duplex (D-TFDD), which is a novel duplexing scheme that combines time-division duplex (TDD) and frequency-division duplex (FDD). In D-TFDD, a user receives from the base station (BS) on the downlink in one frequency band and transmits to the BS on the uplink in another frequency band, as in FDD. Next, the user shares its uplink transmission (downlink reception) on the corresponding frequency band with the uplink transmission or the downlink reception of another user in a D-TDD fashion. Hence, in a given frequency band, the BS communicates with user 1 (U1) and user 2 (U2) in a D-TDD fashion. The proposed D-TFDD scheme does not require inter-cell interference (ICI) knowledge and only requires channel state information (CSI) of the local BS-U1 and BS-U2 channels. Thereby, it is practical for implementation. The proposed D-TFDD scheme increases the throughput region between the BS and the two users in a given frequency band, and significantly decreases the outage probabilities on the corresponding BS-U1 and BS-U2 channels. Most importantly, the proposed D-TFDD scheme doubles the diversity gain on both the corresponding BS-U1 and the BS-U2 channels compared to the diversity gain of existing duplexing schemes, which results in very large performance gains.
KW - Interference
KW - base stations (BSs)
KW - downlink
KW - dynamic scheduling
KW - dynamic time-division duplex (D-TDD)
KW - fifth generation (5G) mobile communication
KW - resource management
KW - signal to noise ratio
KW - throughput
KW - uplink
UR - http://www.scopus.com/inward/record.url?scp=85084916594&partnerID=8YFLogxK
U2 - 10.1109/TWC.2020.2970701
DO - 10.1109/TWC.2020.2970701
M3 - Journal article
SN - 1536-1276
VL - 19
SP - 3118
EP - 3132
JO - I E E E Transactions on Wireless Communications
JF - I E E E Transactions on Wireless Communications
IS - 5
M1 - 8985535
ER -