PUCCH Power Control Using DAI and Resource Pool Scheduling
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Solution Overview
Problem
The challenge of adapting PUCCH transmit power determination methods to accommodate the new Downlink Assignment Index (DAI) interpretation in high-frequency wireless communication systems, particularly in scenarios like Uplink, Downlink, and Sidelink, is not adequately addressed by existing technologies, leading to potential power control inaccuracies and increased interference.
Innovation Solution
A unified power control method for PUCCH transmission is introduced, utilizing a first time-frequency resource pool, Downlink Assignment Index (DAI) field, and resource elements to determine the transmit power based on the number of PDSCHs and resource elements, ensuring accurate power adjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a node selects a random backoff time from a backoff window to transmit a frame, then the transmission opportunity is determined, but the node cannot distinguish between frames received from different parents in a mesh network, leading to ambiguous routing decisions
Solution Approach 1:
The patent applies color changes by using different Backoff Window identifiers (analogous to different colors) to distinguish frames from different parents. Each parent is assigned a unique Backoff Window identifier, allowing the receiving node to identify the source parent through the identifier attached to the frame, thereby resolving the ambiguity of frame origin in mesh networks.
2Device complexity
If a node uses a fixed backoff window for all transmissions, then the mechanism is simple, but the node cannot prioritize transmissions from different parents or handle multiple parents effectively
Solution Approach 1:
The patent applies dynamics by making the backoff window configurable and adaptable rather than fixed. The system allows dynamic selection of backoff windows based on the receiving node's parent relationships, enabling prioritization of certain transmissions. The backoff window identifier is dynamically assigned based on the source node's role and relationship with the receiving node.
Solution Approach 2:
The patent applies segmentation by dividing the single backoff window into multiple distinct backoff windows, each associated with a specific parent or transmission priority level. This segmentation allows the system to handle multiple parents and different transmission scenarios independently, improving adaptability while maintaining manageable complexity through structured organization.
3Device complexity
If a node transmits without indicating parent information, then the transmission process is simplified, but the routing decision becomes ambiguous when multiple parents are involved
Solution Approach 1:
The patent applies the intermediary principle by introducing a Backoff Window identifier as a mediating element between the transmitting node and the receiving node. This identifier carries parent information implicitly, serving as a mediator that enables the receiving node to identify the source parent and make accurate routing decisions without requiring explicit parent indication fields in the frame.
Data Source
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AI summary
Disclosed in the present application are a method and apparatus for use in wireless communication nodes. The apparatus comprises: a first receiver, configured to receive a first information block and first signaling, wherein the first information block is configured to determine a first time-frequency resource pool, the first signaling comprises a first domain, the first signaling is configured to schedule K PDSCHs, K is a positive integer greater than 1 and not greater than N, and N is predefined or configurable; and a first transmitter, configured to transmit a first signal by using a first transmit power, the first signal carrying at least one control information bit, wherein the first resource amount is the number of resource particles comprised in the first time-frequency resource pool for the first signal, at least one of the K or the N is used for determining a first numerical value, the first domain and the first numerical value are collectively used for determining a first number of information bits; and the first number of information bits and the first resource amount are collectively used for determining the first transmit power.