Downlink Control Information Bundling for Spatial Division Multiplexing
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Solution Overview
Problem
Current wireless communication systems face inefficiencies in downlink control communications due to the need to transmit separate downlink control information (DCI) messages for multiple beams, leading to increased complexity, power consumption, and latency, especially as the number of concurrent spatial division multiplexing (SDM) streams increases.
Innovation Solution
The method involves transmitting an indication of a first beam from a set of beams configured for SDM for reception of a DCI message associated with a second beam, allowing the UE to receive DCI messages via a single beam pair, reducing the need for separate transmissions and receptions of DCI messages for each beam pair.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate DCI messages are transmitted for each beam in SDM, then each beam can receive complete control information, but system complexity and power consumption increase
Solution Approach 1:
The patent combines multiple DCI messages into a single bundled DCI message that is transmitted once and received by multiple UEs simultaneously. This merging approach eliminates the need to transmit separate DCI messages for each beam, thereby reducing system complexity and power consumption while maintaining reliable control information delivery to all UEs through the unified transmission.
2Reliability
If separate DCI messages are transmitted for each beam, then complete control information is delivered to each UE, but power consumption increases
Solution Approach 1:
The patent merges multiple DCI transmissions into a single bundled transmission that serves multiple UEs simultaneously. By transmitting control information once rather than multiple times across different beams, the system significantly reduces the total energy consumed by base station and UE devices while ensuring all UEs receive the necessary control information through the unified message.
3Reliability
If separate DCI messages are transmitted for each beam, then each beam receives appropriate control information, but latency increases
Solution Approach 1:
The patent combines multiple DCI message transmissions into a single time-efficient bundled transmission. Instead of sequentially transmitting control information for each beam across different time slots, the system transmits one unified DCI message that contains information for multiple beams, thereby reducing overall transmission time and latency while maintaining reliable delivery to all UEs.
4Adaptability or versatility
If multiple beam pairs are used for DCI transmission, then spatial division multiplexing is enabled, but the number of required transmissions increases
Solution Approach 1:
The patent creates a universal bundled DCI message structure that serves multiple functions simultaneously. A single transmission of the bundled message performs the role of multiple separate DCI transmissions, enabling the system to maintain SDM capability while dramatically improving transmission efficiency. The unified message structure allows one transmission event to replace multiple beam-specific transmission events.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive an indication of a first beam, of a set of beams configured for spatial division multiplexing (SDM), for reception of a downlink control information (DCI) message associated with a second beam of the set of beams. The UE may receive, via the first beam, the DCI message associated with the second beam. Numerous other aspects are described.