Network Controller Guard Period Configuration for Millimeter Wave Interference
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Solution Overview
Problem
In millimeter wave wireless communications, particularly at 60 GHz and 45 GHz, existing technologies face challenges in determining when to establish a guard period for service periods (SPs) within a wireless local area network (WLAN), leading to increased protection overheads and interference due to the lack of scheduling information from adjacent BSSs.
Innovation Solution
A network controller acquires and determines scheduling information from adjacent network controllers to assess time and frequency overlapping between SPs, and sends guard period configuration information to stations, indicating whether a guard period is needed, thereby reducing interference and overheads.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a station establishes a guard period for an SP without scheduling information from adjacent BSSs, then interference protection is provided, but protection overheads increase due to blind establishment
Solution Approach 1:
The network controller performs preliminary scheduling by determining scheduling information of adjacent BSSs before the station establishes the guard period. This advance planning allows the station to make informed decisions about guard period establishment, avoiding blind establishment and reducing unnecessary protection overheads while maintaining reliable interference protection.
2Loss of time
If a station does not establish a guard period without scheduling information, then protection overheads are reduced, but interference occurs due to missing scheduling information
Solution Approach 1:
The network controller acquires scheduling information from adjacent BSSs and provides this information to the station as feedback. This feedback mechanism enables the station to accurately determine whether guard period establishment is necessary, reducing unnecessary overheads while maintaining reliable interference protection through informed decision-making.
3Measurement precision
If the network controller acquires scheduling information from adjacent BSSs, then accurate guard period determination is enabled, but system complexity increases
Solution Approach 1:
The network controller serves as an intermediary between adjacent BSSs and the station. It acquires scheduling information from adjacent BSSs, processes this information, and provides it to the station. This intermediary role simplifies the overall system architecture by centralizing the complex scheduling information acquisition and processing tasks, enabling accurate guard period determination without significantly increasing individual device complexity.
Data Source
AI summary
A network controller includes: an acquiring unit, configured to acquire scheduling information of an adjacent network controller of a first network controller; a determining unit, configured to determine a status of time and frequency overlapping between another access period and a first SP; a scheduling unit, configured to set guard period configuration information of the first SP according to an interfered status of the first SP and the overlapping status determined by the determining unit; and a first sending unit, configured to send the guard period configuration information of the first SP to a station.