Beam Indication for Semi-Persistent Scheduling in 5G Networks
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Solution Overview
Problem
Current wireless communication systems, particularly in 5G networks, face challenges in interference-aware beam reporting, secondary cell beam failure recovery, synchronization signal block quasi co-location indication, and beam indication for semi-persistent and grant-free transmissions, which affect network efficiency and user equipment performance.
Innovation Solution
The implementation of advanced techniques for interference-aware beam reporting, secondary cell beam failure recovery, synchronization signal block quasi co-location indication, and beam indication methods, including the use of L1-RSRP, L1-RSRQ, and L1-SINR measurements, to enhance beam selection and recovery processes in 5G networks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If beam indication is provided for semi-persistent and grant-free transmissions, then network efficiency and user equipment performance are improved, but device complexity and measurement requirements increase
Solution Approach 1:
The patent applies preliminary action by providing beam indication information in advance for semi-persistent and grant-free transmissions. The network configures beam indication parameters before the actual transmission occurs, allowing user equipment to prepare the appropriate beams beforehand. This reduces latency and improves network efficiency without requiring complex real-time beam management during transmission.
Solution Approach 2:
The patent uses beam indication information as an intermediary element that mediates between the network and user equipment. This intermediary carries essential beam configuration data that enables user equipment to perform measurements and select beams autonomously, reducing the need for complex network-side control while improving overall system efficiency.
2Measurement precision
If interference-aware beam reporting techniques are implemented, then beam selection accuracy is improved, but measurement precision requirements and processing complexity increase
Solution Approach 1:
The patent segments the beam measurement and reporting process into distinct phases. User equipment performs measurements on configured beams and reports results in structured formats. The network then processes these segmented reports to determine optimal beam selections. This segmentation simplifies the overall complexity by breaking down the complex interference-aware beam reporting into manageable stages.
Solution Approach 2:
The patent employs parameter changes by configuring specific measurement parameters for interference-aware beam reporting. The network can adjust measurement bandwidth, reference signal configurations, and reporting thresholds to optimize beam selection accuracy while controlling processing complexity. These parameter changes allow flexible adaptation to different network conditions without requiring fundamentally complex processing.
3Reliability
If beam indication is provided before transmission, then transmission reliability is improved, but information overhead and signaling complexity increase
Solution Approach 1:
The patent applies universality by designing beam indication information that serves multiple functions simultaneously. The same beam indication parameters are used for both semi-persistent and grant-free transmissions, reducing redundant signaling. Additionally, the beam indication information supports both uplink and downlink beam configurations, minimizing overall information overhead while maintaining transmission reliability across different transmission types.
Data Source
AI summary
A UE can include processing circuitry coupled to memory. To configure the UE for semi-persistent scheduling (SPS) transmission or a grant-free transmission, the processing circuitry is to decode RRC signaling from a base station, the RRC signaling configuring a plurality of transmission configuration information (TCI) candidates indicating a first set of transmission beams for an initial transmission on an SPS PDSCH. The initial transmission uses an initial transmission beam that is selected based on a TCI beam index. A MAC CE from the base station is decoded, the MAC CE indicating a re-configuration of the plurality of TCI candidates to include at least a second set of transmission beams for the SPS PDSCH. A transmission beam is selected from the second set of transmission beams based on the TCI beam index. Downlink data received in a subsequent transmission via the selected transmission beam on the SPS PDSCH is decoded.