RLC PDU Construction for MIMO Transport Block Allocation

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Solution Overview

Problem

In LTE wireless communication systems with MIMO configuration, existing technologies face challenges in constructing and transmitting packets efficiently due to issues such as RLC PDUs exceeding TB sizes, incomplete buffer status reports, and inefficient packet segmentation, leading to transmission failures and resource allocation inefficiencies.

Innovation Solution

The method involves transforming RLC SDUs into RLC PDUs that fit within the allowances of multiple transport blocks, selecting appropriate TBs for RLC PDUs, and including buffer status reports in each MAC PDU to ensure accurate resource allocation and reliable transmission.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If RLC PDUs are constructed without considering individual TB size limits in MIMO configuration, then packet construction is simplified, but RLC PDUs exceed TB sizes causing transmission failures

Engineering Contradiction:

Improvepacket construction simplicityVSAvoidtransmission reliability

Core Design Contradiction:

Ease of manufactureVSReliability

Solution Approach 1:

The invention segments the RLC PDU construction process into multiple stages: first determining individual TB size limits, then dividing the total RLC PDU allowance accordingly. This ensures each RLC PDU fits within its allocated TB size while maintaining systematic construction procedures.

Inventive Principle:

Principle #1Segmentation

2Reliability

If packet segmentation is performed excessively to fit TB sizes, then transmission reliability improves, but packet transfer efficiency decreases

Engineering Contradiction:

Improvetransmission reliabilityVSAvoidpacket transfer efficiency

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The invention dynamically adjusts segmentation based on actual TB size allowances and RLC PDU requirements. Rather than fixed excessive segmentation, the system adapts the segmentation level to match the specific transmission conditions, optimizing both reliability and efficiency.

Inventive Principle:

Principle #15Dynamics

3Loss of energy

If buffer status reports are included only in selected MAC PDUs, then resource allocation overhead is reduced, but resource allocation accuracy decreases

Engineering Contradiction:

Improveresource allocation overheadVSAvoidbuffer status reporting accuracy

Core Design Contradiction:

Loss of energyVSMeasurement precision

Solution Approach 1:

The invention merges buffer status reporting into every MAC PDU transmission, combining resource allocation information with buffer status information in each transmission unit. This ensures complete and accurate buffer status reporting while efficiently utilizing transmission resources.

Inventive Principle:

Principle #5Merging (Combining)

Data Source

PatentEP2184881B1Method of constructing and transmitting packets with MIMO configuration in a wireless communication system and related communication device

Publication Date: 2014.08.13 HTC CORP

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AI summary

A method of constructing and transmitting packets with multiple-input multiple-output, hereinafter called MIMO, configuration in a radio link control layer of a wireless communication system includes, in a transmission opportunity, transforming at least an RLC service data unit into at least an RLC protocol data unit, hereinafter called PDU, according to an RLC PDU allowance of each of a plurality of transport blocks. Each of the at least an RLC PDU fits within at least an RLC PDU allowance of the plurality of transport blocks (202).