Frame Structure Segmentation for Low-Latency Wireless Transmissions
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Solution Overview
Problem
Existing wireless communication systems, such as LTE, do not adequately support low latency transmissions necessary for latency-sensitive traffic types like Voice over Internet Protocol and automobile control signals, limiting the expansion of these systems to new scenarios and user experiences.
Innovation Solution
Implementing a new frame structure that includes a first region for control channel monitoring and a second region for low latency data transmission, with specific resource element configurations and higher layer signaling to support low latency configurations, allowing for faster packet decoding and feedback.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If a traditional frame structure is used for wireless transmissions, then backward compatibility with existing devices is maintained, but latency performance deteriorates for latency-sensitive traffic types
Solution Approach 1:
The frame structure is segmented into a first region for control channel monitoring and a second region for data transmission. This segmentation allows low latency packets to be transmitted and processed in the second region without affecting the control channel operations in the first region, enabling reduced latency while maintaining compatibility with existing devices that rely on traditional control channel structures.
Solution Approach 2:
The patent introduces a new spatial dimension to the frame structure by creating distinct regions with different functionalities. The first region maintains traditional control channel operations while the second region enables low latency data transmission, effectively adding a new operational dimension without disrupting existing single-dimension frame structures.
2Loss of time
If resources are allocated for low latency data transmission, then latency performance improves, but device complexity increases due to dual configuration requirements
Solution Approach 1:
Different regions of the frame are assigned different qualities and functions: the first region maintains traditional control channel characteristics while the second region is optimized for low latency data transmission. This local differentiation allows devices to handle low latency traffic with specialized resources without requiring complete reconfiguration of all device components.
Solution Approach 2:
The frame structure is designed with multi-functionality where the first region serves traditional control purposes and the second region serves low latency data transmission. This universal design allows a single frame structure to accommodate both traditional and low latency requirements, reducing the need for separate specialized configurations.
3Loss of time
If a new frame structure with separate regions is implemented, then low latency transmissions are enabled, but the system loses flexibility in resource allocation for normal latency traffic
Solution Approach 1:
The resource allocation within the second region is designed to be dynamic, allowing the network to flexibly allocate resources for low latency traffic based on current network conditions and traffic demands. This dynamic allocation ensures that while the frame structure is optimized for low latency, the system retains adaptability in how resources are distributed within the designated low latency region.
Data Source
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AI summary
A method and apparatus provide for low latency transmissions. A resource assignment can be received (1620). A first set of time-frequency resources in a subframe can be determined from the resource assignment (1630). A second set of time-frequency resources in the subframe can be determined (1640). The second set of time-frequency resources can be for a low latency data transmission. The second set of time-frequency resources can overlap with at least a portion of the first set of time-frequency resources. A regular latency data transmission in the subframe can be decoded based on the determined first and second set of time-frequency resources (1650). The regular latency transmission can have a longer latency than the low latency transmission.