Grant-less Wireless Node Distributed Scheduling Interference Control
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Solution Overview
Problem
In wireless communication systems, devices with small data to transmit, such as IoE devices, face high overhead in establishing network connections, which is inefficient in terms of power usage and can lead to network interference due to the lengthy signaling procedures required for conventional connected access.
Innovation Solution
Implementing distributed scheduling for grant-less transmissions, where wireless nodes randomly select access resources from a common pool to transmit data without requesting resources, allowing for efficient data transmission and reduced interference by determining data rate and duration based on received parameters from the base station.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional connected access is used for small data transactions, then reliable network connection is established, but overhead and power consumption increase significantly
Solution Approach 1:
The patent extracts and removes the lengthy signaling procedures and resource allocation exchanges from the connection establishment process. Devices perform grant-less transmissions by directly selecting resources from a pre-configured pool without going through the conventional random access channel (RACH) procedure, thereby eliminating unnecessary overhead while maintaining essential connection reliability for small data packets
Solution Approach 2:
Instead of the conventional approach where devices request resources and wait for grants before transmitting, the patent inverts the process by allowing devices to directly select and use resources from a pre-configured pool without prior authorization. This grant-less approach reverses the traditional signaling sequence, reducing power consumption while maintaining network control through subsequent uplink grants
2Reliability
If conventional connected access signaling procedures are used, then network connection is established, but transmission delay increases
Solution Approach 1:
The patent applies preliminary action by pre-configuring resource pools and transmission parameters before devices need to send data. Base stations provide distributed scheduling information in advance, allowing devices to immediately select and transmit on appropriate resources without undergoing time-consuming signaling procedures, thus reducing transmission delay while maintaining connection reliability
Solution Approach 2:
The patent removes the lengthy random access channel (RACH) procedure and resource allocation signaling from the transmission path. By extracting these intermediate steps and replacing them with direct grant-less transmissions using pre-configured resources, the system significantly reduces the time required to establish network connection and begin data transmission
3Productivity
If many wireless devices use grant-less transmissions, then network capacity increases, but interference between devices increases
Solution Approach 1:
The patent applies local quality by distributing different scheduling parameters and resource pool configurations to different devices or device groups. Each device receives tailored distributed scheduling information including specific resource pools, transmission power levels, and modulation schemes adapted to its channel conditions, thereby reducing interference while maintaining high network capacity
Solution Approach 2:
The patent utilizes parameter changes by dynamically adjusting transmission parameters such as power spectral density, modulation and coding schemes, and resource selection based on channel conditions and interference levels. Base stations provide distributed scheduling information that enables devices to adapt their transmission parameters, reducing interference through power control and parameter optimization while supporting many simultaneous devices
Data Source
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AI summary
Certain aspects of the present disclosure generally relate to techniques for distributed scheduling to control interference for small data transactions using grant-less transmissions. A method for wireless communications by wireless node is provided. The method generally includes receiving, from a base station, a list of supported modulation and coding schemes (MCS) and at least one parameter to control interference, determining a data rate and duration for a grant-less transmission based on the list of supported MCS and the at least one parameter, selecting access resources to use for the grant-less transmission from a common pool of resources configured to be shared by a plurality of wireless nodes for grant-less transmissions, and transmitting the grant-less transmission using the selected access resources, at the determined data rate and for the determined duration.