PDCP Downlink Data Allocation for 5GNR LTE Interference
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Solution Overview
Problem
Current wireless communication networks using Fifth Generation New Radio (5GNR) and Long Term Evolution (LTE) do not effectively mitigate radio interference, despite allocating downlink data based on buffer status and noise metrics.
Innovation Solution
The implementation of a Packet Data Convergence Protocol (PDCP) that dynamically adjusts the allocation of downlink data between 5GNR and LTE portions based on an uplink noise metric, modifying the proportions to mitigate high noise interference by increasing the 5GNR portion and decreasing the LTE portion when noise levels rise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If downlink data is allocated between 5GNR and LTE based on buffer status and noise metrics, then RLC buffer delay is mitigated, but radio interference is not effectively mitigated
Solution Approach 1:
The patent implements dynamic allocation of downlink data between 5GNR and LTE access nodes based on real-time uplink noise metrics. The 5GNR access node continuously monitors the uplink noise metric and adjusts the allocation proportion of 5GNR versus LTE portions accordingly, transitioning from static buffer-based allocation to dynamic noise-aware allocation to simultaneously address both buffer delay and radio interference mitigation
Solution Approach 2:
The system establishes a feedback mechanism where the 5GNR access node receives uplink noise metrics from the wireless communication network, processes this information through the PDCP, and adjusts the downlink data allocation in response. This closed-loop feedback enables the system to adapt to changing radio conditions and effectively mitigate radio interference while maintaining buffer efficiency
2Productivity
If the 5GNR access node allocates downlink data into 5GNR and LTE portions based on buffer status, then data transfer efficiency is improved, but radio interference mitigation is insufficient
Solution Approach 1:
The patent changes the allocation parameter from buffer status alone to a combination of buffer status and uplink noise metrics. The PDCP at the 5GNR access node uses the uplink noise metric as a key parameter to dynamically adjust the proportion of 5GNR versus LTE portions in downlink data allocation, enabling the system to respond to radio interference conditions while maintaining efficient data transfer
Data Source
AI summary
In a wireless access node, Packet Data Convergence Protocol (PDCP) circuitry identifies a noise metric for the wireless access node. The PDCP circuitry receives Downlink (DL) user data for User Equipment (UE). The PDCP circuitry allocates a first portion of the DL data and a second portion of the DL data based on the noise metric. The PDCP circuitry transfers the first portion of the DL data over first Radio Link Control (RLC) circuitry to first MAC circuitry. The PDCP circuitry transfers the second portion of the DL data over second RLC circuitry to second MAC circuitry. The first MAC circuitry schedules wireless delivery of the first portion of the DL data and transfers the first portion of the DL data to the UE over first Physical Layer (PHY) circuitry. The second MAC circuitry schedules wireless delivery of the second portion of the DL data and transfers the second portion of the DL data to the UE over second PHY circuitry.