Base Station Frame Pause for LAA WiFi Coexistence

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Solution Overview

Problem

Current technologies face challenges in efficiently managing channel access and resource allocation in the 5 GHz ISM frequency band for coexisting LAA/MuLTEfire and WiFi radio communication schemes, particularly in utilizing new TxOP parameter sets and handling contention window management and UL resource allocation.

Innovation Solution

The introduction of a pause section in the radio frame structure between downlink and uplink sections, with a minimum duration of 100 microseconds, allows for efficient coexistence by enabling scheduled transmissions and adapting contention window sizes based on TxOP durations, thereby optimizing channel occupancy and reducing interference.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If LAA/MuLTEfire and WiFi both access the 5 GHz band simultaneously, then channel utilization increases, but interference and channel access conflicts increase

Engineering Contradiction:

Improvechannel utilizationVSAvoidinterference

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

The radio frame is segmented into distinct downlink and uplink sections with a pause section in between, creating structured time divisions that allow WiFi systems to access the channel during the pause period while LAA/MuLTEfire maintains controlled access during other periods, thereby reducing interference while maintaining high channel utilization

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The radio frame structure employs periodic transmission opportunities with regular pause sections inserted between downlink and uplink transmissions, creating predictable periodic patterns that enable WiFi systems to anticipate and access the channel during pause periods, reducing random conflicts and improving overall channel utilization

Inventive Principle:

Principle #19Periodic action

2Adaptability or versatility

If pause section is inserted between downlink and uplink sections, then WiFi access opportunity increases, but transmission delay increases

Engineering Contradiction:

ImproveWiFi access opportunityVSAvoidtransmission delay

Core Design Contradiction:

Adaptability or versatilityVSLoss of time

Solution Approach 1:

Data buffering is performed in advance during the downlink section, preparing data for potential retransmission or uplink acknowledgment during the uplink section, so that the pause section does not cause actual data loss or require additional retransmission delays, thereby minimizing the impact of the pause on overall transmission timing

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentEP3334200B1Base station and mobile station circuitries for coexisting access of first and second radio communication

Publication Date: 2021.04.14 INTEL CORP

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AI summary

The disclosure relates to a circuitry, comprising: a transceiver circuit, configured to transceive a radio frame in a dedicated frequency band which is dedicated for coexisting access of a first radio communication scheme and a second radio communication scheme; and a frame generation circuit, configured to generate the radio frame according to the first radio communication scheme and to insert at least one pause section into the radio frame to allow the second radio communication scheme accessing the dedicated frequency band during the at least one pause section.