Ad-hoc Wireless Node Resource Allocation Scheduling
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Solution Overview
Problem
Ad-hoc wireless networks face challenges in avoiding collisions due to the lack of a dedicated base station to coordinate transmission times, necessitating a method for node operation based on network-wide resource-allocation schedules.
Innovation Solution
A method and system where a controller node in an ad-hoc wireless network obtains and verifies air-interface resource requests using a network-standard algorithm to derive a network-wide resource-allocation schedule, ensuring nodes operate according to designated time slots to avoid collisions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If nodes transmit simultaneously in ad-hoc wireless networks without centralized coordination, then network autonomy and flexibility are improved, but collision probability increases leading to communication reliability deterioration
Solution Approach 1:
The patent implements preliminary action by having nodes exchange resource allocation schedules before actual data transmission occurs. Each node determines time slots, frequencies, and codes in advance through schedule exchange messages, ensuring that transmission resources are pre-coordinated to avoid collisions while maintaining network autonomy without centralized base station control.
Solution Approach 2:
The patent implements feedback mechanisms through schedule exchange messages where nodes transmit their intended resource allocation schedules to other nodes. Receiving nodes provide feedback by acknowledging schedules or requesting modifications, enabling iterative coordination that resolves potential collisions while preserving distributed network operation.
2Reliability
If a network-wide resource-allocation schedule is implemented to avoid collisions, then communication reliability is improved, but network complexity increases due to coordination overhead
Solution Approach 1:
The patent segments the resource allocation process into discrete components: time slots, frequencies, and codes are separately assigned and managed. The schedule exchange messages are divided into specific message types (schedule announcement, schedule acknowledgment, schedule modification request), allowing complex resource coordination to be handled through modular, manageable message exchanges rather than monolithic coordination protocols.
Solution Approach 2:
The patent implements periodic action by establishing recurring schedule exchange cycles where nodes periodically transmit and update their resource allocation schedules. This periodic coordination ensures that resource allocations remain current and collisions are prevented through regular schedule synchronization, while the rhythmic nature of the exchanges makes the complexity predictable and manageable.
3Reliability
If centralized base station coordination is used to manage transmission times, then collision avoidance is improved, but network adaptability deteriorates due to dependency on dedicated infrastructure
Solution Approach 1:
The patent implements self-service by enabling nodes to autonomously determine and manage their own transmission resources based on exchanged schedule information. Each node independently selects time slots, frequencies, and codes from the coordinated schedule without requiring continuous centralized control, allowing the network to adapt to node mobility and failures while maintaining collision avoidance through distributed schedule management.
Solution Approach 2:
The patent uses resource allocation schedules as an intermediary mechanism that enables coordination between nodes without requiring direct centralized control. The schedules act as a mediator that carries coordination information between nodes, allowing them to achieve collision-free operation through indirect coordination via the schedule messages rather than direct base station commands.
Data Source
AI summary
Disclosed herein are methods and systems for node operation according to network-wide resource-allocation schedules. One embodiment takes the form of a method carried out by a given node within an ad-hoc wireless network, which includes a controller node for a current time period. The method includes obtaining one or more air-interface resource requests for the current time period, where each obtained resource request indicates a requesting node and a requested resource. The method further includes using a network-standard algorithm for deriving a network-wide resource-allocation schedule for the current time period based at least in part on the obtained resource requests. The method further includes verifying the derived resource-allocation schedule based at least in part on a verification value derived by the controller node from the network-wide resource-allocation schedule using a network-standard verification function. The method also includes operating according to the verified resource-allocation schedule for the current time period.


