Multiple Concatenation Buffers at PDCP Layer for Wireless Data
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently processing and transmitting data at the Packet Layer Convergence Protocol (PDCP) layer, particularly in reducing latency and improving throughput due to individual processing of Service Data Units (SDUs).
Innovation Solution
Implementing multiple concatenation buffers at the PDCP layer, where sets of SDUs are concatenated and processed together, rather than individually. Each concatenation buffer is configured with specific parameters such as threshold sizes and timers, and can be associated with different Radio Link Control (RLC) entities and Quality of Service (QoS) flows.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If individual SDUs are processed separately at the PDCP layer, then processing simplicity is maintained, but latency and processing time increase
Solution Approach 1:
The patent merges multiple individual SDU processing operations into a single batch processing operation. Multiple SDUs are collected and processed together as a group, which reduces the total number of processing cycles required and thereby decreases latency and processing time while maintaining manageable complexity through systematic batch handling
2Productivity
If multiple concatenation buffers with different configurations are used, then throughput and efficiency are improved, but device complexity increases
Solution Approach 1:
The patent segments the buffer management system into multiple concatenation buffers, each with specific configurations optimized for different types of data or service requirements. This segmentation allows parallel processing of different SDU sets with appropriate configurations, thereby increasing overall throughput while distributing the complexity across manageable, specialized buffer units rather than requiring one complex universal buffer
3Loss of energy
If SDUs are concatenated in batches, then overhead associated with PDCP processing is reduced, but the complexity of buffer management increases
Solution Approach 1:
The patent implements preliminary action by pre-configuring multiple concatenation buffers with specific parameters before SDU arrival. SDUs are routed to pre-established buffers based on their characteristics, and concatenation operations are performed in advance of transmission requirements. This preliminary organization reduces the overhead during actual processing by having structures ready beforehand, while the complexity of buffer management is handled through systematic pre-configuration rather than dynamic decision-making
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. The described techniques provide for a transmitting device to concatenate one or more sets of service data units (SDUs) at a packet data convergence protocol (PDCP) layer and perform PDCP processing on the concatenated SDUs. The transmitting device may identify multiple SDUs at the PDCP layer and may input the SDUs into one or more concatenation buffers of the transmitting device. The transmitting wireless device may use one or more concatenation buffers associated with respective configurations for concatenating SDUs. For example, the one or more concatenation buffers may each be configured to concatenate SDUs until reaching a threshold size, a concatenation timer expiring, or both. Additionally, or alternatively, the one or more concatenation buffers may be configured to concatenate SDUs according to a radio link control (RLC) entity, a quality of service (QoS) flow, or both.