Radio Bearer Release Protocol Entity Data Delivery

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Solution Overview

Problem

In wireless communication systems, the direct discarding of data stored in buffers when a radio bearer is released can lead to ineffective resource utilization and redundant data transmission, as successfully received data is discarded without being processed.

Innovation Solution

A method and apparatus for releasing a radio bearer that involves determining to release the RLC and PDCP entities, delivering RLC and PDCP service data units to higher layers, and storing and processing data in reception buffers to avoid data loss, ensuring that data is delivered in ascending order of sequence numbers before releasing the entities.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If the entire data stored in buffer is directly discarded when the radio bearer is released, then the release process is simple and fast, but data loss occurs and resources are wasted

Engineering Contradiction:

Improverelease process simplicityVSAvoiddata loss

Core Design Contradiction:

Ease of operationVSLoss of information

Solution Approach 1:

The patent applies preliminary action by delivering all PDCP PDUs from the reception buffer to the higher layer before releasing the PDCP entity. This ensures that data processing is completed in advance, preventing data loss while maintaining an efficient release process. The RLC entity is also released after delivering its SDUs to the PDCP entity, ensuring complete data transfer before entity release.

Inventive Principle:

Principle #10Preliminary action

2Ease of operation

If the entire data stored in buffer is directly discarded when the radio bearer is released, then the release process is simple and fast, but redundant data transmission occurs

Engineering Contradiction:

Improverelease process simplicityVSAvoidresource utilization efficiency

Core Design Contradiction:

Ease of operationVSProductivity

Solution Approach 1:

The patent performs preliminary data delivery to the higher layer before releasing the PDCP and RLC entities. This ensures that successfully received data is processed and delivered in advance, preventing redundant retransmission and optimizing resource utilization while maintaining a straightforward release procedure.

Inventive Principle:

Principle #10Preliminary action

3Loss of information

If data is delivered to higher layers before releasing entities, then data loss is prevented and resource utilization is optimized, but the release process becomes more complex

Engineering Contradiction:

Improvedata loss preventionVSAvoidrelease process complexity

Core Design Contradiction:

Loss of informationVSDevice complexity

Solution Approach 1:

The patent implements preliminary action by systematically delivering PDCP PDUs and RLC SDUs to higher layers before releasing the respective entities. This structured approach, while adding some complexity, ensures complete data processing and prevents data loss, justifying the enhanced procedure through improved reliability and resource efficiency.

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS8774108B2Method of releasing radio bearer in wireless communication system and receiver

Publication Date: 2014.07.08 LG ELECTRONICS INC

AI summary

A method and apparatus of releasing a radio bearer in a wireless communication system is provided. After determining to release a radio link control (RLC) entity and a packet data convergence protocol (PDCP) entity, the RLC entity is released after delivering an RLC service data unit (SDU) extracted according to a release request of the RLC entity to the PDCP entity. A first PDCP SDU obtained by processing the RLC SDU is stored in a reception buffer at the PDCP entity. The PDCP entity is released after delivering the first PDCP SDU stored in the reception buffer to a higher layer.