Buffer Status Reporting for Source and Redundant Packet Volumes
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Solution Overview
Problem
In wireless communications systems, the inefficient use of time-frequency resources occurs due to the implementation of AL-FEC techniques, where UEs discard redundant data packets, leading to communication delays and increased signaling overhead.
Innovation Solution
A UE determines a condition is satisfied for transmitting a BSR that accounts for both source and redundant data packets, indicating a data volume that aligns with the allocated time-frequency resources, thereby optimizing resource utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If AL-FEC techniques are implemented with redundant data packets, then data transmission reliability is improved, but time-frequency resource utilization deteriorates
Solution Approach 1:
The patent changes the parameter representation in BSR by introducing a codepoint system that encodes both source and redundant packet volumes. This allows the network to allocate time-frequency resources that match the actual data volume, preventing resource waste while maintaining AL-FEC reliability benefits.
Solution Approach 2:
The patent implements improved feedback mechanisms where the UE provides detailed buffer status information about both source and redundant packets through BSR. This feedback enables the network to make informed resource allocation decisions, allocating resources efficiently based on actual needs rather than over-provisioning for reliability.
2Loss of information
If BSR reports only source data packets, then signaling overhead is reduced, but resource allocation accuracy deteriorates
Solution Approach 1:
The patent makes the BSR mechanism multi-functional by enabling it to report both source and redundant packet volumes through a unified codepoint system. This single BSR structure serves multiple purposes: indicating total data volume, specifying redundant packet portions, and enabling accurate resource allocation, all within one signaling message.
Solution Approach 2:
The patent segments the data volume information into distinct components (source packets and redundant packets) that are reported together in the BSR. By separating these components in the reporting structure, the system achieves precise resource allocation while maintaining efficient signaling through a unified report rather than multiple separate messages.
3Ease of operation
If time-frequency resources are allocated based on total data volume including redundant packets, then resource allocation simplicity is improved, but resource utilization efficiency deteriorates
Solution Approach 1:
The patent transforms the resource allocation process by changing how data volume is parameterized in BSR reports. Instead of reporting only source packets or requiring complex separate reports, the codepoint system encodes both source and redundant volumes in a way that maintains allocation simplicity while enabling efficient resource utilization through accurate volume information.
Data Source
AI summary
Various aspects of the present disclosure relate to buffer status reporting (BSR) for data packets. An apparatus, such as a user equipment (UE), receives a data packet associated with a set of data packets for transmission (e.g., a service data unit (SDU) of a packet data convergence protocol (PDCP) protocol data unit (PDU) set). The set of data packets includes a first subset of data packets (e.g., source data packets) and a second subset of data packets (e.g., redundant data packets). The UE determines a condition is satisfied for transmitting a BSR. The UE transmits the BSR based on a configuration for transmitting the BSR. The BSR indicates a data volume associated with the first subset of data packets and a portion of data packets of the second subset of data packets. In some cases, the base station transmits signaling to the UE indicating the configuration.