Compressed Group Feedback for Grant-Free Transport Block Reception
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Solution Overview
Problem
The existing contention-based grant-free random access transmission scheme in wireless communications systems leads to excessive spectrum resource overhead due to the need for individual acknowledgment signals from thousands of user equipments, despite only a fraction actively transmitting, resulting in inefficient use of resources.
Innovation Solution
Implementing compression coding on feedback information representing the reception condition of transport blocks to minimize the number of bits required for acknowledgment signals, thereby reducing the spectrum resources needed for feedback.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a 1-bit response signal is fed back to each served UE, then the base station can determine whether each data packet is successfully received, but thousands of bit response signals need to be fed back causing excessive overhead and waste of spectrum resources
Solution Approach 1:
The patent merges multiple individual acknowledgment signals into a single group feedback message. Instead of sending separate 1-bit ACK/NACK signals to each UE, the base station combines the reception status of multiple UEs into one consolidated feedback message that contains compressed acknowledgment information for the entire group, thereby reducing overhead while maintaining reliability
Solution Approach 2:
The patent changes the parameter of feedback signal structure by introducing compression coding. The acknowledgment information is transformed from individual binary states into a compressed representation that uses fewer bits to encode the same amount of information, changing the fundamental parameter of feedback signal length and composition
2Adaptability or versatility
If the base station does not perform scheduling for UEs, then resource allocation flexibility is improved, but the base station cannot know in advance which UEs have data transmission requirements leading to potential resource conflicts
Solution Approach 1:
The patent implements a feedback mechanism where UEs transmit feedback signals containing information about their data transmission status and reception conditions. This feedback enables the base station to detect which UEs have data to send and which have successfully received data, resolving the detection difficulty while maintaining the flexibility of grant-free access
Solution Approach 2:
The patent uses preliminary group feedback signals that are transmitted before actual data transmission occurs. These feedback signals provide advance information about UE status and reception conditions, allowing the base station to prepare appropriate resource allocation decisions while maintaining adaptability
Data Source
AI summary
An information transmission method and an apparatus, a base station, a user equipment, a storage medium, and a program product are disclosed. The method may include: receiving a transport block (TB) sent by at least one second node, where the TB forms a TB set; obtaining information about a set of correct TBs according to the TB set; encoding the information about the set of correct TBs to obtain feedback information, where the feedback information is used to represent a reception condition of the TB sent by the at least one second node, and the encoding processing may include performing compression coding on the information about the set of correct TBs; and sending the feedback information to the at least one second node.