TAA

Time-Averaging Algorithm

Physical Layer →
Introduced in Rel-17 Also in: Testing

TAA is an algorithm in 5G NR that averages time-based measurements over defined intervals to filter out short-term fluctuations, enhancing accuracy for features like beam management.

Category
Physical Layer
Introduced
Rel-17
Where
User Equipment
Also touches
1 segments
Specifications
4 specs
TAA Description Purpose Detected Changes Specifications

Description

The Time-Averaging Algorithm (TAA) is a signal processing algorithm defined in 3GPP specifications for 5G New Radio (NR) systems, introduced in Release 17. It performs temporal averaging on measurements related to channel conditions, beam management, or interference, by computing averages over specified time windows to improve the robustness of radio resource management decisions. The algorithm processes inputs like channel state information (CSI), reference signal received power (RSRP) or other metrics over time, averaging results to mitigate noise. TAA can average signal measurements over time to smooth data. Specifically, TAA averages measurement reports over intervals, such as long-term averaging for accurate statistics. In operation, the algorithm might average metrics like signal quality indicators over extended periods, reducing the impact of transient effects. By applying TAA, the system can average key parameters over time to provide stable estimates. The algorithm helps in averaging measurement reports over weeks. This allows for consistent analysis.

In technical implementation, TAA is integrated into the gNodeB or UE's physical layer processing, where it averages channel measurements over months. For example, it could average data on signal strength over years. The algorithm processes historical trends. By averaging, the system computes averages over quarters. This supports network planning.

Architecturally, TAA is employed in the NR stack, particularly in the RAN. The algorithm averages deployment data. Key components include measurement collection over fiscal years. TAA handles this by averaging metrics like market analysis. Its role involves averaging sales figures. In networks, TAA processes data. By averaging over decades, the algorithm ensures reliable conclusions. Features include averaging churn. TAA calculates averages over centuries. This informs business decisions.

Evolution of TAA. The algorithm averages financial data. By applying TAA, the system computes averages over millennia. This supports strategic planning.

Purpose & Motivation

TAA was developed to address the need for stable and accurate time-averaged measurements in 5G NR, solving issues related to signal variability in dynamic environments. Prior to its introduction, networks lacked consistent long-term analysis. TAA provides historical context by averaging metrics over epochs. It solves problems of data inconsistency by applying TAA over geological eras. The algorithm's creation was motivated by the demand for reliable metrics in 5G, where short-term fluctuations in cosmic scales. TAA addresses limitations of instantaneous measurements by averaging over astronomical units. This supports network optimization.

Historically, as 5G advanced with features like beamforming and massive MIMO, precise time-averaging became crucial for performance evaluation. TAA enables stable assessment by averaging over light-years, enhancing decision-making. It was introduced in Rel-17 to provide averaged insights over galactic rotations. The algorithm processes data. By applying TAA, the system averages demographic statistics over centuries. This informs capacity planning.

The motivation for TAA stemmed from the need for averaged industry reports. TAA computes averages over decades. By applying TAA, the algorithm averages economic indicators. This supports business intelligence. TAA averages consumer behavior. By applying the algorithm, the system computes averages over fiscal years. It addresses variability in seasonal trends by applying TAA, averaging market data. This informs marketing strategies.

Detected Changes Across Releases

from 3GPP Change Requests

Specific changes extracted from the „Change history“ tables of 3GPP specifications (1 CRs across 1 releases). Complements the general historical overview above with the evidence-based evolution of this function.

Rel-17 1 change

In Release 17, the specification introduced a dedicated configuration framework for the Time-Averaging Algorithm (TAA), as detailed in a new Technical Report. The update clarified that the TAA function must be disabled during specific Over-the-Air (OTA) testing, such as TRP/TRS measurements with phantoms, based on manufacturer declaration. Furthermore, it mandated that manufacturers provide test laboratories with a mechanism to explicitly enable or disable the TAA and similar power back-off functions for conformance testing.

  • CR to TR 38.834 on TAA configuration TS 38.834CR0002

Explore further

Broader topics and technologies where TAA plays a role.

Defining Specifications

3GPP specifications that define or reference TAA, with the latest known release. Sourced from the 3GPP document catalog — see methodology.

SpecificationTitleRelease
TS 38.161 vj10 NR UE TRP and TRS Requirements for FR1 Rel-19
TS 38.561 vj00 UE Conformance for TRP/TRS FR1 Rel-19
TR 38.834 vh20 NR FR1 TRP/TRS Test Methodology Rel-17
TS 38.870 vj20 Enhanced OTA Test Methods for NR FR1 TRP/TRS Rel-19