Thin Control Channel for Synchronous Multiplexing of Variable Latency Traffic
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Solution Overview
Problem
Current wireless communication networks, such as LTE, face challenges in multiplexing traffic with different latency targets, leading to difficulties in supporting diverse latency requirements, which can violate low latency packet requirements and limit peak rate and trunking efficiency.
Innovation Solution
A thin control channel structure is introduced to enable synchronous multiplexing of data with different transmission time intervals (TTIs), allowing for dynamic re-allocation of time-frequency resources and puncturing of long TTIs to accommodate low-latency data, while maintaining orthogonality and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If synchronous multiplexing of different TTI formats is implemented, then latency requirements for diverse applications are met, but control channel complexity increases
Solution Approach 1:
The control channel is segmented into a common control resource set (CORESET) and specific control resource sets (CRS) for different TTI formats. This segmentation allows independent configuration and management of control resources for long TTI and short TTI transmissions, reducing overall control channel complexity while enabling differentiated latency handling.
Solution Approach 2:
The patent introduces a new dimension in control channel design by implementing multiple control resource sets in the time-frequency domain. Instead of using a single control channel structure, the system creates separate control resource dimensions for different TTI formats, allowing simultaneous support of diverse latency requirements without increasing overall system complexity.
2Productivity
If dynamic re-allocation of time-frequency resources is performed, then peak rate and trunking efficiency are improved, but resource management complexity increases
Solution Approach 1:
The patent implements dynamic resource allocation through configurable control resource sets that can be adaptively adjusted based on traffic conditions. The control resources for different TTI formats can be dynamically re-allocated in the time-frequency domain, enabling the system to optimize peak rate and trunking efficiency while maintaining manageable complexity through structured configuration parameters.
3Loss of time
If puncturing of long TTIs is enabled to accommodate short TTIs, then low latency packet requirements are satisfied, but transmission reliability may be compromised
Solution Approach 1:
The patent applies preliminary action by pre-configuring control resource sets and establishing puncturing patterns before actual data transmission. The control resources for short TTIs are predetermined and can be inserted into long TTI structures without ad-hoc modifications, ensuring that puncturing operations maintain transmission reliability through pre-planned resource allocation and proper signaling to receiving devices.
Data Source
AI summary
Aspects of the disclosure provide for a thin control channel structure that can be utilized to enable multiplexing of two or more data transmission formats. For example, a thin control channel may carry information that enables ongoing transmissions utilizing a first, relatively long transmission time interval (TTI) to be punctured, and during the punctured portion of the long TTI, a transmission utilizing a second, relatively short TTI may be inserted. This puncturing is enabled by virtue of a thin channel structure wherein a control channel can carry scheduling information, grants, etc., informing receiving devices of the puncturing that is occurring or will occur. Furthermore, the thin control channel can be utilized to carry other control information, not being limited to puncturing information. Other aspects, embodiments, and features are also claimed and described.