Jointly Encoded DCI Block for Multi-Transport Scheduling
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Solution Overview
Problem
Current wireless communication systems face inefficiencies in scheduling multiple transport blocks, leading to high power consumption for user equipment (UE) as they monitor and decode multiple separate downlink control information (DCI) blocks, which can prolong device wakefulness and increase energy usage.
Innovation Solution
Implementing a technique where a base station transmits a single downlink control information (DCI) block to schedule multiple transport blocks using joint encoding to reduce the number of valid outputs, thereby minimizing the DCI block size and allowing the UE to enter a lower power mode sooner.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple separate DCI blocks are transmitted to schedule multiple transport blocks, then scheduling information granularity is improved, but UE power consumption increases and device wakefulness is prolonged
Solution Approach 1:
The patent merges multiple separate DCI blocks into a single unified DCI block that schedules multiple transport blocks simultaneously. This is achieved by combining multiple DCI formats into one structure with a single CRC scrambled by multiple RNTIs, allowing the UE to receive all scheduling information in one go and enter power-saving state sooner, thus resolving the contradiction between scheduling granularity and power consumption
Solution Approach 2:
The unified DCI block is designed to perform multiple scheduling functions simultaneously, serving as a universal scheduling mechanism that can handle multiple transport blocks with different parameters (MCS, RV, NDI, HARQ process IDs) within a single structure, thereby maintaining fine scheduling control while reducing the number of separate DCI transmissions
2Use of energy by moving object
If a single DCI block is transmitted to schedule multiple transport blocks, then UE power consumption is reduced, but the complexity of encoding and decoding increases
Solution Approach 1:
The unified DCI block is segmented into multiple independent field groups, each corresponding to a specific transport block's scheduling parameters (MCS, RV, NDI, HARQ process ID). This segmentation allows the UE to decode only the necessary fields for active transport blocks, reducing the effective decoding complexity despite the unified structure, while still achieving power savings compared to multiple separate DCI blocks
Solution Approach 2:
The patent introduces an intermediary mechanism where the single DCI block uses a unified CRC scrambled by multiple RNTIs to mediate between the need for multiple scheduling decisions and the desire for a single transmission. This intermediary structure enables the UE to identify and process only the relevant transport block information, managing decoding complexity while maintaining power efficiency
3Adaptability or versatility
If multiple separate DCI blocks are transmitted, then scheduling flexibility is improved, but the number of bits required for transmission increases
Solution Approach 1:
The patent combines multiple DCI blocks into a single unified structure that uses shared fields (such as a common CRC and resource allocation indicators) and individual fields for each transport block. This merging reduces the total bit count compared to transmitting separate DCI blocks while preserving scheduling flexibility through the individual transport block parameter fields, directly addressing the contradiction between flexibility and transmission volume
Data Source
AI summary
In methods, systems, and devices for wireless communications, a user equipment (UE) may receive a downlink control information (DCI) block including DCI for a set of transport blocks scheduled for the UE, the DCI including a set of fields. The UE may decode the DCI block to obtain the DCI for the set of transport blocks, where at least two fields of the downlink control information are jointly decoded according to an encoding scheme, and where each possible output of the encoding scheme corresponds to a jointly valid combination of the at least two fields. The UE may receive the set of transport blocks from a base station based on the DCI.