Service Period Truncation in 60 GHz Wireless Networks
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In 60 GHz wireless communications, the dynamic truncation of service periods (SPs) by stations (STAs) can lead to interference with adjacent STAs when releasing surplus SP time as a contention-based access period (CBAP), as existing methods only specify whether truncation is possible without determining the truncation type.
Innovation Solution
The method involves determining allocation control information for SPs that includes a truncation indication and a truncation type indication, allowing STAs to truncate SPs according to specified types, such as returning time to the network controller or releasing it as a CBAP, thereby reducing interference by considering communication requests, interference information, and scheduling data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the STA actively determines the truncation type and releases remaining SP time as CBAP, then the SP can be dynamically truncated to adapt to variable rate streaming services, but interference is imposed on adjacent STAs
Solution Approach 1:
The network controller acts as an intermediary that receives truncation requests from STAs, determines the appropriate truncation type based on global scheduling information and interference conditions, and returns the determined truncation type to the STA. This intermediary mechanism prevents direct STA-to-STA interference while maintaining dynamic SP truncation capability.
Solution Approach 2:
The system implements a feedback loop where the STA sends a truncation request to the network controller, the controller determines the truncation type based on current network state and scheduling information, and feeds back the determination to the STA. This feedback mechanism ensures that truncation decisions are made with complete information about network conditions.
2Ease of operation
If the PCP or AP only specifies whether the SP can be truncated without determining the truncation type, then the system is simple to operate, but the STA cannot avoid imposing interference on adjacent STAs
Solution Approach 1:
The network controller serves as an intermediary that receives the simple yes/no truncation permission from the system, then actively determines the specific truncation type (first type or second type) based on global scheduling information and interference conditions, resolving the interference problem while maintaining operational simplicity.
Solution Approach 2:
The system changes the parameter of truncation control from a simple binary indication (can truncate or cannot truncate) to a multi-type indication (first truncation type or second truncation type), allowing the network controller to specify not just whether truncation is permitted but also how it should be executed to avoid interference.
Data Source
AI summary
The present invention discloses a method for truncating a service period, a network controller, and a station. The method includes: determining allocation control information of an service period, where the allocation control information includes a truncation indication and a truncation type indication; and sending the allocation control information to a station, so that the station uses the service period to perform communication, and truncates the service period according to a truncation type indicated by the truncation type indication when the service period is surplus and the truncation indication indicates that the service period can be truncated. According to the method for truncating a service period, the network controller, and the station in embodiments of the present invention, interference to communication after the service period is truncated can be reduced.