On-Demand SSB Pattern Signaling for Faster Secondary Cell Activation
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Solution Overview
Problem
In wireless communication systems, the activation of secondary cells using on-demand synchronization signal blocks (SSBs) is hindered by unpredictable timing and measurement delays due to the lack of a common understanding of the SSB pattern between the UE and the network node, leading to inefficiencies and increased latency in SCell activation.
Innovation Solution
The proposed solution involves identifying and signaling a pattern for on-demand SSBs in association with secondary cell activation, allowing the UE and network node to synchronize and activate the secondary cell efficiently by receiving and transmitting the SSB according to this pattern, thereby reducing activation time and overhead.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If on-demand SSB is transmitted without a common understood pattern, then the network node can activate secondary cell, but the UE cannot accurately predict timing and measurement delays increase
Solution Approach 1:
The network node transmits an indication of the SSB pattern to the UE in advance, before the actual SSB transmission occurs. This preliminary action allows the UE to prepare its timing expectations and measurement configurations ahead of time, eliminating uncertainty about when the SSB will arrive and reducing measurement delays during activation.
Solution Approach 2:
The system establishes a feedback mechanism where the network node provides pattern indication to the UE, and the UE uses this information to adjust its timing and measurement parameters. This feedback loop ensures both sides have aligned expectations about SSB timing, resolving the contradiction between activation efficiency and timing predictability.
2Adaptability or versatility
If no common understanding of SSB pattern is established, then network node can transmit SSB freely, but UE and network node cannot synchronize properly
Solution Approach 1:
The network node provides the SSB pattern indication to the UE before transmission, establishing a common understanding in advance. This preliminary sharing of pattern information ensures both sides are synchronized in their expectations, maintaining reliability while preserving the flexibility of on-demand transmission.
Solution Approach 2:
The SSB pattern indication acts as an intermediary information carrier between the network node and UE. This intermediary element transmits the timing and pattern information needed for synchronization without constraining the network node's flexibility in when it chooses to transmit the actual SSB.
3Productivity
If on-demand SSB pattern is not signaled, then network node can activate secondary cell quickly, but UE experiences increased overhead and inefficiency
Solution Approach 1:
The essential timing and pattern information is extracted from the full SSB transmission and conveyed separately through the pattern indication to the UE. This extraction allows the UE to understand the SSB characteristics without receiving the complete SSB immediately, reducing overhead while maintaining activation speed.
Solution Approach 2:
Instead of transmitting the complete SSB immediately, the network node provides only the necessary pattern information (partial action) to the UE in advance. This partial information suffices for the UE to prepare its timing and measurement parameters, achieving efficient activation with reduced overhead.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may identify a pattern for an on-demand synchronization signal block (SSB), wherein identifying the pattern is in association with a secondary cell activation. The UE may receive the on-demand SSB in accordance with the pattern. The UE may activate a secondary cell in accordance with the on-demand SSB. Numerous other aspects are described.