Specialized DCI Formats for MTC UE Scheduling
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current wireless communication systems face challenges in efficiently scheduling data transmissions to or from Machine Type Communication (MTC) User Equipments (UEs) with limited capabilities, particularly in reducing PDCCH overhead and minimizing decoding operations while maintaining scheduling efficiency and functionality.
Innovation Solution
Designing specialized Downlink Control Information (DCI) formats for MTC UEs that reduce the number of bits and information elements, such as HARQ process numbers, modulation and coding schemes, and resource allocation granularity, and using different coding methods for data transmitted to and from MTC UEs to optimize PDSCH and PUSCH transmissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If conventional DCI formats are used for MTC UEs, then complete scheduling information can be provided, but PDCCH overhead increases and decoding operations increase
Solution Approach 1:
The patent extracts and removes unnecessary information elements from the DCI format specifically for MTC UEs. Elements such as HARQ process number, redundancy version, and uplink indicator are omitted or reduced in bit length, as MTC UEs have limited capabilities and do not require full scheduling information. This extraction reduces PDCCH overhead while maintaining sufficient scheduling functionality for MTC devices.
Solution Approach 2:
The patent applies different DCI format configurations for different UE types. Conventional UEs receive full-featured DCI formats with complete scheduling information, while MTC UEs receive simplified DCI formats with reduced information elements. This local differentiation ensures each UE type receives appropriate scheduling information without unnecessary overhead.
2Adaptability or versatility
If conventional DCI formats are used for MTC UEs, then full scheduling functionality is maintained, but number of decoding operations increases
Solution Approach 1:
The patent removes unnecessary information elements from DCI formats scheduled for MTC UEs, including HARQ process number, redundancy version, and uplink indicator fields. This extraction reduces the number of decoding operations required by MTC UEs while preserving essential scheduling functionality needed for their limited capabilities.
Solution Approach 2:
Instead of providing full DCI formats and expecting MTC UEs to decode all information elements, the patent inverts the approach by providing only the essential information elements that MTC UEs need. This inversion reduces decoding complexity while maintaining adequate scheduling functionality for MTC devices.
3Ease of manufacture
If standardized coding methods are used for all UEs, then implementation is simple, but transmission efficiency for MTC UEs is suboptimal
Solution Approach 1:
The patent applies different coding methods based on UE type. Conventional UEs use standardized coding methods for simplicity and compatibility, while MTC UEs use optimized coding methods tailored to their specific capabilities and traffic patterns. This local differentiation improves transmission efficiency for MTC UEs without complicating the overall system implementation.
Solution Approach 2:
The patent changes coding parameters specifically for MTC UE transmissions, including code rate, block size, and modulation scheme, to optimize transmission efficiency for MTC devices with their limited capabilities and typical traffic patterns, while maintaining standardized parameters for conventional UEs.
Data Source
AI summary
Methods and apparatus are described for a User Equipment (UE) with reduced processing capabilities (e.g., Machine Type Communication (MTC) UE) to transmit and receive signaling are provided. The Downlink Control Information (DCI) formats scheduling a transmission of a Physical Uplink Shared CHannel (PUSCH) or a reception of a Physical Downlink Shared CHannel (PDSCH) are designed and have a smaller size than respective DCI formats for conventional UEs. DCI formats scheduling PUSCHs to or PDSCHs for a group of MTC UEs are also designed and can have a same size as DCI formats scheduling PUSCH or PDSCH for an individual MTC UE.