Dynamic Antenna Adaptation for Semi-Persistent Scheduling
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Solution Overview
Problem
Existing wireless communication systems face challenges in dynamically adapting antenna configurations for semi-persistent scheduling (SPS) downlink traffic, which affects energy efficiency and signaling overhead.
Innovation Solution
The implementation of dynamic network-side antenna adaptation techniques for SPS downlink traffic, where the base station can adjust antenna configurations based on current or predicted cell load, and transmit updated transmission parameters to the user equipment (UE) through specific control channels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If dynamic antenna adaptation is implemented for SPS downlink traffic, then energy efficiency is improved, but signaling overhead increases
Solution Approach 1:
The patent extracts the antenna adaptation configuration from the main SPS activation DCI by using a separate indicator field that references pre-configured antenna settings. This separation allows the system to enable dynamic antenna adaptation while minimizing the signaling overhead in the SPS activation message, as the actual antenna configuration details are not repeatedly transmitted but rather referenced from existing configurations.
Solution Approach 2:
The patent implements preliminary action by pre-configuring antenna adaptation parameters and transmission parameters before SPS activation. The network node prepares multiple antenna configuration options in advance, and during SPS activation, only a reference indicator needs to be transmitted to select from these pre-prepared configurations. This eliminates the need to transmit complete antenna configuration data repeatedly, thereby reducing signaling overhead while maintaining energy efficiency benefits.
2Manufacturing precision
If antenna adaptation configuration is included in SPS activation DCI, then transmission parameter accuracy is improved, but DCI message size increases
Solution Approach 1:
The patent uses copying by referencing pre-configured antenna parameters rather than including complete parameter sets in the DCI message. An indicator field in the DCI points to previously configured antenna adaptation settings, effectively copying the reference to existing configuration data. This maintains transmission parameter accuracy by ensuring consistent use of pre-validated configurations while significantly reducing the DCI message size compared to transmitting full parameter sets.
3Productivity
If dynamic antenna adaptation is enabled for SPS PDSCH, then spectral efficiency is improved, but system complexity increases
Solution Approach 1:
The patent implements dynamics by enabling the network node to dynamically select and switch between different pre-configured antenna adaptation configurations based on current channel conditions and traffic requirements. The system maintains a set of pre-configured options and can adaptively choose the most appropriate configuration for each SPS transmission, thereby improving spectral efficiency while managing system complexity through structured pre-configuration rather than ad-hoc parameter generation.
Solution Approach 2:
The patent applies parameter changes by allowing the network node to modify antenna adaptation parameters and transmission parameters based on detected channel conditions and QoS requirements. The system changes parameters such as antenna ports, DMRS configuration, and modulation schemes dynamically selected from pre-configured options, enabling spectral efficiency improvement while controlling complexity through parameter selection rather than complete reconfiguration.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive, from a network node, downlink control information (DCI) that includes a semi-persistent scheduling (SPS) activation indication. The UE may receive, from the network node, an SPS physical downlink shared channel (PDSCH) based at least in part on the SPS activation indication, wherein the SPS PDSCH is associated with one or more transmission parameters that are based at least in part on an antenna adaptation configuration applicable to the SPS PDSCH. Numerous other aspects are described.