Collaborative Radio Network Slot Subdivision for Interference Reduction
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Solution Overview
Problem
In wireless radio networks, collaborative communication between multiple nodes is inefficient due to legacy nodes interfering with collaborative nodes, leading to wasted reserved transmission time and unavailability of certain nodes to join communication groups, as existing methods like CSMA/CA and RTS/CTS do not effectively manage interference and time sharing among multiple transmitting and receiving nodes.
Innovation Solution
A method where active nodes in a collaborative group send medium access requests for the same transmission slot, with a coordinator node acknowledging the reservation and dividing the slot into sub-slots for each node, optimizing the use of reserved time by locking out legacy nodes and determining available nodes for data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If CSMA/CA and RTS/CTS mechanisms are used for medium access control, then collision avoidance and medium reservation are improved, but interference from legacy nodes and waste of reserved transmission time increase
Solution Approach 1:
The transmission slot is divided into multiple sub-slots that are allocated to different collaborative nodes based on their availability and communication needs. This segmentation allows only active nodes to transmit during their assigned sub-slots, preventing waste of reserved time and reducing interference from legacy nodes while maintaining collision avoidance through structured time division.
2Productivity
If multiple nodes access the same transmission slot simultaneously, then network throughput is improved, but interference between nodes and legacy nodes increases
Solution Approach 1:
Different sub-slots within the transmission slot are assigned to specific collaborative nodes based on their local availability and communication requirements. This local quality assignment ensures that each active node transmits only during its designated sub-slot, minimizing interference with legacy nodes and other collaborative nodes while maximizing overall network throughput through efficient resource utilization.
3Adaptability or versatility
If legacy nodes continue to use traditional CSMA/CA access method, then backward compatibility is maintained, but interference with collaborative nodes increases
Solution Approach 1:
The system performs preliminary actions by having collaborative nodes send medium access requests and receive coordinator node responses before actual data transmission begins. This preliminary reservation process locks out legacy nodes from accessing the transmission slot during the coordinated sub-slot periods, enabling collaborative nodes to communicate efficiently while maintaining backward compatibility with legacy CSMA/CA operations for nodes that do not participate in the collaborative scheme.
Data Source
AI summary
The present invention relates to communication between collaborative nodes configured to collaboratively communicate in a radio network. A corresponding method comprises: sending, by each active node of the set of collaborative nodes, an RTS message for the same transmission slot; sending, by one of the active nodes, referred to as coordinator node, a CTS message to acknowledge reservation of said transmission slot on behalf of all the active nodes, upon receiving the RTSs; wherein the transmission slot is divided, based on the sent RTSs, into sub-slots for respective active nodes to transmit data packets. The invention provides an improved use of the reserved transmission slot, and a reduced waste of reserved time.