Resource Element Mapping Indicator for Wireless Downlink
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Solution Overview
Problem
Current wireless communication systems, particularly in LTE and 4G, face inefficiencies in resource element (RE) mapping for the downlink shared channel, leading to waste and decreased throughput due to reserved resources not being utilized and the inability to adapt to new RE patterns in forthcoming devices, which affects legacy device performance and future compatibility.
Innovation Solution
A hybrid signaling method for RE mapping in 5G systems that allows different physical resource blocks (PRBs) to have unique RE mapping patterns, using bitmaps to indicate REs and enabling flexible configuration, including grouping PRBs and allocating RE mapping patterns dynamically, to ensure efficient use and forward compatibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single RE mapping pattern is used for all PRBs, then signaling overhead is reduced, but resource utilization efficiency decreases and adaptability to different devices is limited
Solution Approach 1:
The patent divides the bandwidth into multiple PRB groups, where each group can be independently configured with different RE mapping patterns. This segmentation allows the system to balance signaling overhead and adaptability by applying the same pattern within a group while allowing different patterns across groups, resolving the contradiction between unified signaling and flexible adaptation.
Solution Approach 2:
The patent enables different RE mapping patterns to be applied to different PRB groups based on local requirements. Each PRB group can have customized RE mapping characteristics suited to its specific function or device type, while still using a common signaling framework, thus achieving both signaling efficiency and local adaptability.
2Reliability
If reserved REs are allocated for control channels, then control channel reliability is improved, but data channel throughput decreases due to unused resources
Solution Approach 1:
The patent introduces dynamic RE mapping patterns that can adaptively allocate REs between control and data channels based on actual traffic conditions. When data traffic is high, more REs can be dynamically assigned to data while maintaining control channel functionality, thus improving overall throughput while preserving necessary control reliability.
Solution Approach 2:
The patent changes the RE mapping parameters dynamically based on system conditions, device types, and traffic requirements. By adjusting the RE mapping pattern parameters, the system can optimize the balance between control channel reliability and data channel throughput for different scenarios, rather than using fixed reservations.
3Stability of the object's composition
If legacy RE mapping patterns are used, then compatibility with existing devices is maintained, but support for new 5G features and devices is limited
Solution Approach 1:
The patent designs a universal RE mapping framework that can accommodate both legacy and new 5G devices through a common signaling structure. The system can select from multiple RE mapping patterns including legacy-compatible ones, allowing the same infrastructure to serve diverse device types and 5G features simultaneously.
Solution Approach 2:
The patent prepares multiple RE mapping patterns in advance, including those compatible with legacy devices and those optimized for new 5G features. The appropriate pattern is selected and applied based on device capability and service requirements, enabling forward compatibility while maintaining support for existing devices.
Data Source
AI summary
A system employing resource element mapping for efficient use of the downlink control channel is provided for a wireless communication system. In one example, a method comprises: generating, by a base station device comprising a processor, resource element mapping signaling, wherein the resource element mapping signaling is performed per subgroup of physical resource blocks of a group of physical resource blocks; transmitting, by the base station device, a first resource element mapping pattern to a first subgroup of the group of physical resource blocks; and transmitting, by the base station device, a second resource element mapping pattern to a second subgroup of the group of physical resource blocks, wherein the first resource element mapping pattern is distinct from the second resource element mapping pattern.