Multi-Slot Reference Signal Triggering With Combination IDs
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Solution Overview
Problem
Existing wireless communication standards, such as 3GPP Rel-16, lack flexibility in configuring and triggering aperiodic CSI-RS/SRS resources across multiple slots, particularly in the 52.6-71 GHz band, due to processing time/power constraints and inflexible RRC configurations, which limits beam management and channel sounding capabilities.
Innovation Solution
Implementing a network node that transmits a configuration of reference signal sets via RRC signaling and downlink control information (DCI) to trigger these signals across multiple slots, using reference signal set combination IDs to identify and combine sets of reference signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single DCI triggers reference signal resources in multiple slots, then flexibility and beam management capability are improved, but processing time and power constraints are worsened
Solution Approach 1:
The patent segments the reference signal triggering process by introducing a combination ID field in DCI that can independently identify different combinations of reference signal sets across multiple slots. This allows the network to trigger multiple reference signal sets in a distributed manner across different slots, enabling flexible beam management while maintaining manageable processing requirements for the wireless device.
Solution Approach 2:
The patent implements preliminary configuration of reference signal sets through RRC signaling before actual triggering. The combination ID in DCI then references pre-configured sets, allowing the wireless device to prepare processing resources in advance rather than handling all triggering decisions in real-time, thus reducing instantaneous processing power requirements while maintaining flexibility.
2Productivity
If a single DCI triggers reference signal resources in multiple slots, then PDCCH capacity is improved, but device complexity increases
Solution Approach 1:
The patent uses a combination ID field in DCI that acts as a reference or copy key to identify pre-configured reference signal set combinations. Instead of embedding full triggering information for multiple slots in each DCI, the system copies configuration data once through RRC signaling and uses compact combination IDs in DCI to reference these configurations, thereby increasing PDCCH capacity while keeping device complexity manageable.
3Productivity
If reference signal sets are configured for multiple slots, then beam management efficiency is improved, but RRC configuration flexibility is worsened
Solution Approach 1:
The patent adds a new dimension to reference signal configuration by introducing the combination ID field in DCI, which enables selection among multiple pre-configured reference signal set combinations. This dimensional extension allows efficient beam management across multiple slots without rigidly constraining RRC configuration, as the network can dynamically select different combinations through the added ID dimension rather than being limited to fixed slot-based configurations.
Data Source
AI summary
A network node is configured to communicate with a wireless device. The network node includes a radio interface and processing circuitry configured to transmit a configuration of a set of reference signals via RRC signaling to the wireless device. The radio interface and processing circuitry are further configured to transmit a downlink control information, DCI, that triggers the set of reference signals in multiple slots to the wireless device, where each set of reference signal is confined to OFDM symbols within a slot. In some embodiments, the DCI includes a field which indicates a reference signal set combination ID. In further embodiments the reference signal set combination ID indicates a list of RS set IDs. A method for a network node, a wireless device and a method for a wireless device are also provided.