Acknowledgment Messaging for Wireless Resource Reservations
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Solution Overview
Problem
In wireless communications systems, especially in high pathloss environments, control information such as resource reservations may be lost, leading to increased latency and inefficient signaling due to the inability of child nodes to receive or decode control messages.
Innovation Solution
Implementing acknowledgment messaging for resource reservations, where parent nodes transmit control messages indicating resource reservations and child nodes respond with acknowledgment messages on a physical uplink control channel (PUCCH), allowing the parent node to quickly detect lost control information and adjust signaling accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If acknowledgment messaging is implemented for resource reservations, then reliability of control information delivery is improved, but device complexity increases due to additional signaling procedures
Solution Approach 1:
The patent implements a feedback mechanism where child nodes transmit acknowledgment messages on the PUCCH to confirm receipt of control messages from parent nodes. This feedback loop enables the parent node to detect lost control information and trigger retransmissions, directly improving reliability of control information delivery in high pathloss environments.
Solution Approach 2:
The system performs preliminary actions by having child nodes monitor for control messages and prepare acknowledgment responses in advance. The parent node schedules control messages with anticipated acknowledgment timing, allowing the system to proactively manage reliability rather than reacting to failures after they occur.
2Reliability
If acknowledgment messages are transmitted on PUCCH, then reliability of resource reservation confirmation is improved, but loss of energy increases due to additional transmission overhead
Solution Approach 1:
The system applies partial action by having child nodes transmit acknowledgment messages only when necessary (when control information is successfully received), rather than continuously transmitting. This selective acknowledgment approach confirms reliability while minimizing unnecessary energy consumption compared to continuous or mandatory acknowledgment protocols.
3Productivity
If parent nodes monitor for acknowledgment messages, then productivity of communication efficiency is improved, but loss of time increases due to waiting for acknowledgment before data transmission
Solution Approach 1:
The patent implements preliminary action by having the parent node schedule and transmit control messages with built-in acknowledgment timing information. The parent node prepares the timing parameters for acknowledgment reception in advance, allowing efficient monitoring without excessive waiting time. This enables the system to proactively manage the acknowledgment timing rather than passively waiting for responses.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. The described techniques may enable a first wireless device (e.g., a parent node) to transmit a control message to a second wireless device (e.g., a child node). The control message may include a resource reservation for communication with the second wireless device. The second wireless device may receive the control message and may transmit an acknowledgment message acknowledging successful reception of the resource reservation. The first wireless device may monitor for the acknowledgment message and may communicate with the second wireless device based on whether the acknowledgment message is received. For example, if the first wireless device receives feedback acknowledging successful reception of the resource reservation at the second wireless device, the devices may communicate data in the reserved resources. Otherwise, the first wireless device may retransmit a control message if the first control message was not successfully received.