Dual Connectivity Buffer Status Reporting Coordination

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Solution Overview

Problem

Current buffer status reporting mechanisms in dual connectivity scenarios are inefficient, as they are designed for single connection setups, leading to suboptimal scheduling and resource wastage in radio communications networks.

Innovation Solution

Implementing a method where wireless devices evaluate trigger conditions for buffer status reporting and transmit reports to both Master eNB and Secondary eNB, allowing coordinated scheduling of radio resources based on received buffer status reports to enhance network performance.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If buffer status reporting is performed using existing single-connection mechanisms in dual connectivity scenarios, then the reporting process remains simple, but scheduling efficiency deteriorates and radio resources are wasted

Engineering Contradiction:

Improvescheduling efficiencyVSAvoidbuffer status reporting complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The patent segments the buffer status reporting process by introducing separate reporting mechanisms for different connection types (master eNB and secondary eNB). The UE maintains separate buffer status information for each connection and reports accordingly, allowing each base station to optimize scheduling for its specific connection while maintaining overall system efficiency.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent implements preliminary action by having the UE evaluate trigger conditions for buffer status reporting before actual data transmission. This allows the network to proactively allocate radio resources based on predicted buffer status, improving scheduling efficiency by preventing resource contention and reducing latency.

Inventive Principle:

Principle #10Preliminary action

2Loss of energy

If coordinated scheduling between master eNB and secondary eNB is implemented, then resource allocation efficiency improves, but system complexity increases

Engineering Contradiction:

Improveradio resource wastageVSAvoidcoordinated scheduling complexity

Core Design Contradiction:

Loss of energyVSDevice complexity

Solution Approach 1:

The patent merges the scheduling functions of master eNB and secondary eNB through coordinated operation. Both base stations share buffer status information and coordinate their scheduling decisions to avoid conflicting resource allocations, thereby reducing radio resource wastage while distributing the complexity burden across multiple nodes rather than concentrating it in a single controller.

Inventive Principle:

Principle #5Merging (Combining)

Data Source

PatentUS9900902B2Radio base station, wireless device, and methods therein

Publication Date: 2018.02.20 TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)

AI summary

Embodiments herein relate to method in a wireless device (10) for handling data transmissions in a radio communications network (1). The wireless device (10) is served by a first radio base station (12) and a second radio base station (13) providing dual connectivity to the wireless device (10) in the radio communications network (1). The wireless device (10) evaluates whether a trigger condition for buffer status reporting is fulfilled. When the trigger condition is fulfilled, the wireless device (10) transmits a buffer status report to the first radio base station and/or the second radio base station.