ACK Transmission Scheduling via Position-Based Time Slot Distribution
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In wireless communication systems, when multiple access terminals share the same time domain resource, transmitting acknowledgment (ACK) or negative acknowledgment (NAK) information in the same time slot leads to power imbalance and excessive interference at the access network, particularly problematic for low data rate services like VoIP, real-time messaging, and gaming.
Innovation Solution
Distributing ACK/NAK transmissions by determining the position of each access terminal within the group and sending these acknowledgments in a time slot that is a function of its position, thereby spreading the transmissions across multiple time slots to minimize interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If all access terminals transmit ACK/NAK information in the same time slot, then the acknowledgment transmission process is simple and fast, but excessive interference and power imbalance occur at the access network
Solution Approach 1:
The patent segments the acknowledgment transmissions by distributing them across multiple time slots based on access terminal positions. Instead of all terminals transmitting simultaneously in one time slot, terminals are divided into groups that transmit in different time slots, thereby reducing interference and power imbalance while maintaining transmission efficiency
Solution Approach 2:
The patent introduces a new dimension for organizing acknowledgments by using access terminal positions (e.g., geographic location, signal strength ranking, or assigned indices) to determine transmission timing. This positional dimension is mapped to different time slots, transforming the acknowledgment process from a single-time-slot simultaneous transmission to a multi-time-slot distributed transmission
2Adaptability or versatility
If multiple low data rate service users share the same time domain resource, then resource utilization is efficient, but all users transmitting ACK/NAK in the same slot causes severe interference
Solution Approach 1:
The patent segments the group of low data rate service users into different transmission groups based on their positions, assigning each group to different time slots for ACK/NAK transmission. This segmentation allows efficient time domain resource sharing while preventing severe interference by ensuring not all users transmit simultaneously
Solution Approach 2:
The patent implements periodic acknowledgment transmissions where different user groups transmit in different time slots according to their assigned positions. This periodic distribution of transmissions across time slots maintains resource utilization efficiency while eliminating the harmful effect of simultaneous transmissions from all users
Data Source
AI summary
A communication system distributes, in the time domain, acknowledgment transmissions by a group of access terminals sharing a same time domain resource. A position of one or more access terminals in the group of access terminals is determined and each of the one or more access terminals then sends an acknowledgment transmission, such as an acknowledgment or negative acknowledgement, in a time slot that is N time slots after the shared time domain resource, where N is a function of the position of the access terminal in the group of access terminals.