Base Station Handover Sequence Number Extraction

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Solution Overview

Problem

The existing wireless communication systems face challenges in reducing the processing capacity of base stations during handover procedures, leading to increased network traffic and data transfer rate degradation due to packet loss.

Innovation Solution

A method is introduced where the source base station informs the target base station of the sequence number of an uplink data block, allowing the target base station to manage and receive the corresponding data block, and the user equipment transmits the unacknowledged data block to the target base station, optimizing data sharing and reducing processing capacity.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the source base station delivers all received data blocks to the target base station during handover, then data completeness is improved, but processing capacity of the target base station increases and network traffic increases

Engineering Contradiction:

Improvedata completenessVSAvoidprocessing capacity of target base station

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The patent extracts only the necessary information (sequence number of the last successfully received data block) from the source base station and transmits it to the target base station. This eliminates the need to transmit all actual data blocks, thereby reducing processing capacity requirements and network traffic while maintaining data completeness through selective retransmission by the user equipment.

Inventive Principle:

Principle #2Taking out (Extraction)

2Reliability

If the source base station delivers all received data blocks to the target base station during handover, then data completeness is improved, but network traffic increases

Engineering Contradiction:

Improvedata completenessVSAvoidnetwork traffic

Core Design Contradiction:

ReliabilityVSQuantity of substance

Solution Approach 1:

The patent extracts only the essential sequence number information rather than transmitting complete data blocks through the network. This dramatically reduces network traffic while ensuring data completeness is maintained through the user equipment's ability to retransmit specific missing blocks based on the received sequence number.

Inventive Principle:

Principle #2Taking out (Extraction)

3Productivity

If data is transmitted and received at high data transfer rate, then productivity is improved, but packet loss increases which sharply decreases data transfer rate

Engineering Contradiction:

Improvedata transfer rateVSAvoidpacket loss

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The patent performs preliminary action by having the source base station transmit the sequence number of the last successfully received data block to the target base station before the handover is complete. This allows the user equipment to proactively retransmit any missing data blocks to the target base station, preventing packet loss and maintaining high data transfer rates during the handover process.

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS8774125B2Method of managing data blocks during handover

Publication Date: 2014.07.08 LG ELECTRONICS INC

AI summary

A method of enabling a source base station (BS) to manage an uplink data block during handover from the source BS to a target BS in a wireless communication system is provided. The method includes informing the target BS of a sequence number of a uplink data block to be received from a user equipment (UE) and receiving from the target BS the uplink data block corresponding to the sequence number. Data is properly shared by a source base station (BS) and a target BS during handover. Thus, processing capacity of the target BS can be reduced and overhead on network interface can also be reduced.