Grantless Uplink Channel Selection via Interference Tolerance Feedback
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In wireless communication systems, devices that transmit small amounts of data face high overhead costs due to the request-grant method, which is inefficient for small data devices like IoT and IoE devices, leading to increased energy consumption and reduced battery life.
Innovation Solution
Implementing a network-assisted grantless data transmission method where wireless devices can transmit data without requesting scheduling entity resources, using interference tolerance information to select available uplink channels and modulation and coding schemes, reducing interference and improving energy efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the request-grant method is used for data transmission, then reliable resource allocation is achieved, but overhead increases and energy consumption increases for small data devices
Solution Approach 1:
The wireless device autonomously selects uplink channels and modulation and coding schemes based on interference tolerance information provided by the network, eliminating the need for request-grant signaling. This self-service approach reduces overhead and energy consumption while maintaining reliable transmission through informed channel selection.
Solution Approach 2:
The network pre-provides interference tolerance information for multiple uplink channels before the wireless device needs to transmit data. This preliminary action enables the device to make informed decisions about channel selection and transmission parameters without requiring real-time scheduling requests, reducing overhead and energy usage.
2Productivity
If grantless data transmission is implemented, then overhead is reduced and energy efficiency improves, but interference management becomes more challenging
Solution Approach 1:
The network provides interference tolerance information as feedback to wireless devices, enabling them to select channels and transmission parameters that minimize interference. This feedback mechanism allows grantless transmission to proceed efficiently while maintaining interference management through informed decision-making.
Solution Approach 2:
The system changes transmission parameters (channel selection, modulation and coding schemes) based on interference tolerance information. By dynamically adjusting these parameters according to network conditions, the system achieves high transmission efficiency while managing interference levels effectively.
3Adaptability or versatility
If multiple uplink channels are available for grantless transmission, then transmission flexibility increases, but channel selection complexity increases
Solution Approach 1:
Interference tolerance information acts as an intermediary that guides channel selection. Instead of directly comparing multiple channels based on complex criteria, the network provides pre-evaluated interference tolerance information that simplifies the selection process while maintaining flexibility in choosing from multiple available channels.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
Aspects of the present disclosure provide for a network assisted grantless data transmission method operable in a wireless communication network. A wireless device may transmit grantless data without requesting a scheduling entity to grant and schedule network resources prior to the grantless data transmission. A scheduling entity determines interference tolerance information of a plurality of uplink channels, wherein the interference tolerance information is configured to individually indicate an availability of each of the plurality of uplink channels for grantless uplink data transmission. The scheduling entity broadcasts the interference tolerance information to one or more subordinate entities or wireless devices.