Anyone know, why Ducting issues comes on TDD layer only?
Ducting means High SINR.
HI managuli would you please share NOKIA parameter
Hi Experts.
For LTE TDD ducting interference, the characteristic sequence are sent by eNB upon detecting sloping interference.
So SSF 7 to 5 is triggered when the no of characteristic sequence is > 8.
I don’t understand the statement…
How the number of sequence identification tigger SSF7 to 5?
Basically it’s Uplink interference of a Downlink sequence.
Affects the entire transmission.
Yes, but I want to understand what is the correlation with the No of Sequence detected.
For e.g., if I change it into 12, what will be the impact?
When RI is detected by a base station, it starts transmitting a special Sequence of RIM reference signal.
This signal can be used by aggressors to identify the victim base station and how many symbols it interferes.
It may additionally be used to indicate from the victim to the aggressor if enough RI mitigation has been applied or not.
The RIM reference sequence signal may also be sent by the aggressor after it has applied RIM, to indicate to the victim that the tropospheric duct still exists or stopped.
Thanks, but my question is about LTE TDD, not 5G.
Hello experts,
Are there any counters available to measure the ducting effect in TDD LTE 3.5 GHz for Huawei equipment?
Under certain atmospheric ducting conditions, uplink (UL) reception can be significantly interfered with by downlink (DL) transmissions from remote base stations (gNBs) located hundreds of kilometers away.
As a result, UL slots within Special Slots are particularly affected, primarily impacting the Sounding Reference Signal (SRS), since these UL slots carry the SRS transmissions.
To address this issue, the Remote Interference Management (RIM) feature has been introduced.
How does RIM help?
RIM typically works by identifying the sources of interference and applying mitigation strategies. These strategies may include adjusting transmission power levels to reduce the impact of the interfering signals.
It is important to note that, under ducting conditions, SRS beamforming can be severely degraded due to compromised SRS signal quality. Therefore, it is highly recommended to activate the fallback mechanism, allowing the system to switch between DL SRS-based beamforming and codebook-based beamforming to maintain performance and overcome these challenges.
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