Reference Signal Design for Remote Interference Management in 5G New Radio

Peralta, Elena; Mäenpää, Mikko; Levanen, Toni; Yuk, Youngsoo; Pedersen, Klaus I.; Nielsen, Sari; Valkama, Mikko

doi:10.1109/eucnc.2019.8802014

Cited by 7 publications

(22 citation statements)

References 7 publications

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“…This article comprehensively extends the preliminary work and results in [12] in terms of detection performance analysis in the RIM framework investigating possible propagation delay based gNB grouping and corresponding RIM-RS transmission schemes. It is assumed that the network operator would group gNBs on a specific region to simultaneously transmit RIM-RSs, as the atmospheric ducting phenomenon is typically affecting relatively large regions simultaneously.…”

Section: Contributions and Noveltymentioning

confidence: 63%

“…The so-called one OFDM symbol (1OS) RIM-RS design is proposed based on the 5G NR channel state information reference signal (CSI-RS), while the two OFDM symbol (2OS) RIM-RS design is built similar to the LTE RIM-RS. The preliminary findings in [12] show the suitability of the 1OS RIM-RS when increasing the number of gNBs transmitting different RIM-RS sequences, due to the shorter time duration of this design and the reduced probability for overlapping between sequences in the receiver, compared to the 2OS case. Specifically, both RIM-RS structures were evaluated in the study in [12] to verify the achievable performance with increased number of transmitting gNBs.…”

Section: Rim and 5g Nrmentioning

confidence: 92%

“…The preliminary findings in [12] show the suitability of the 1OS RIM-RS when increasing the number of gNBs transmitting different RIM-RS sequences, due to the shorter time duration of this design and the reduced probability for overlapping between sequences in the receiver, compared to the 2OS case. Specifically, both RIM-RS structures were evaluated in the study in [12] to verify the achievable performance with increased number of transmitting gNBs. Also, it was assumed that a a pool of different RIM-RS sequences were transmitted from different gNBs within a given propagation delay range and using the same frequency domain resources based on the 3GPP agreements [10].…”

Section: Rim and 5g Nrmentioning

confidence: 92%

“…The fundamental task of NR-RIM is to detect when the remote interference occurs, to identify the group of interfering gNBs, and finally to measure the propagation delays between the aggressor and victim gNB or groups of gNBs. To this end, two potential RIM reference signal (RIM-RS) designs were presented in a previous study [12] and evaluated in terms of remote interference detection probability together with the receiver processing framework. The so-called one OFDM symbol (1OS) RIM-RS design is proposed based on the 5G NR channel state information reference signal (CSI-RS), while the two OFDM symbol (2OS) RIM-RS design is built similar to the LTE RIM-RS.…”

Section: Rim and 5g Nrmentioning

confidence: 99%

“…Two alternative RIM-RS designs are analyzed as exhibited in a previous study [12], following the RS requirements defined by 3GPP specifications [10]. In TD-LTE networks, the RIM-RS adopts a repetitive structure so that the detection can be done at OFDM symbol level in the receiver.…”

Section: Nr-rim Reference Signal Designsmentioning

confidence: 99%

See 4 more Smart Citations

Remote interference management in 5G new radio: methods and performance

Peralta

Levanen

Mäenpää

et al. 2021

J Wireless Com Network

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In time division duplexing based mobile networks, under certain atmospheric ducting conditions, the uplink reception may be interfered by the downlink transmissions of remote base-stations (gNBs) located hundreds of kilometers away. This paper addresses such remote interference problem in a 5G new radio (NR) macro deployment context. Specifically, two potential reference signal (RS) designs for remote interference management (RIM) are described. The first signal structure, denoted as the one OFDM symbol (1OS) based RIM-RS, is building on the channel state information reference signals of 5G NR. The second candidate is referred to as the two OFDM symbol based RIM-RS design, which builds on the design principles of LTE RIM-RS. The achievable detection performance is evaluated by introducing enhanced receiver algorithms together with three feasible propagation delay based gNB grouping and corresponding RIM-RS transmissions schemes. The performance results in terms of the receiver processing gain highlight that the improved detection algorithm assures sufficient performance to detect the remote interference for both RIM-RSs with all evaluated frequency domain comb-like patterns. The benefit of grouping corresponding RIM-RS transmissions from gNBs located on the same area is greater when using same frequency domain resources per transmitted sequence in practical interference scenarios. Furthermore, applying a common base sequence for all gNBs within a group allows to identify the group based on detected sequence and enables adaptive RIM mitigation schemes. On the other hand, it is shown that the 1OS RIM-RS provides smaller overhead and can be frequency multiplexed with the physical downlink shared channel, which opens up the possibility of using gNB group wise 1OS RIM-RS also for UE interference measurements.

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Section: Contributions and Noveltymentioning

confidence: 63%

Section: Rim and 5g Nrmentioning

confidence: 92%