Low-Latency Transmission Frame Structure with Blind Decoding
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Solution Overview
Problem
Existing wireless communication systems, such as LTE, fail to 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
Implement a new frame structure and resource allocation mechanism that includes dedicated regions and resource elements for low latency data packets, using unique identifiers and blind decoding techniques to enhance user equipment for low latency data transmission while maintaining compatibility with regular latency operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If a new frame structure with dedicated regions for low latency data packets is implemented, then packet latency is reduced, but device complexity increases
Solution Approach 1:
The subframe is segmented into multiple regions: a first region containing a first set of resource elements for control channel monitoring, and a second region containing a second set of resource elements for data transmission. This segmentation allows low latency data to be monitored and decoded from the first region while regular data operations continue in the second region, reducing packet latency without overwhelming device complexity through manageable regional divisions.
Solution Approach 2:
Different regions of the subframe are assigned different functional qualities: the first region is optimized for control channel monitoring with specific resource elements configured for low latency operations, while the second region handles regular data transmission. This local differentiation allows latency-sensitive operations to receive specialized treatment without compromising the overall system structure or requiring complete device redesign.
2Productivity
If resource elements are configured for low latency data transmission, then throughput is improved, but ease of operation deteriorates
Solution Approach 1:
The first set of resource elements in the first region serves multiple functions: it is used for control channel monitoring and can also carry low latency data packets. This multi-functionality allows the same resource elements to improve throughput for latency-sensitive applications while maintaining compatibility with regular operational procedures, as user equipment continues to monitor these elements for control information while simultaneously detecting low latency data.
3Reliability
If blind decoding techniques are used to detect low latency data packets, then reliability is improved, but device complexity increases
Solution Approach 1:
User equipment is pre-configured with knowledge of the first region and first set of resource elements through higher layer signaling before actual low latency data transmission occurs. This preliminary configuration establishes the monitoring framework in advance, allowing blind decoding to proceed systematically through predetermined resource elements rather than requiring complex real-time analysis, thereby improving reliability while keeping device complexity manageable through pre-planned detection sequences.
Data Source
AI summary
A method and apparatus provide for low latency transmissions. A higher layer configuration message can be received that indicates a set of resource blocks for receiving data packets in at least one symbol of a subframe. An attempt can be made to decode a data packet in a first set of resource elements within the set of resource blocks. The first set of resource elements can be in the at least one symbol of the subframe. An attempt can be made to decode the data packet in at least a second set of resource elements within the set of resource blocks. The second set of resource elements can be in the at least one symbol of the subframe. The second set of resource elements can include at least one resource element that is not in the first set of resource elements. The data packet in one of the first set of resource elements and the second set of resource elements can be successfully decoded. A data payload of the decoded data packet can be delivered to an application layer.