Wireless Node Channel Sensing for Resource Allocation
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Solution Overview
Problem
In NR SL systems, vulnerable road users or pedestrian user equipment face severe delays and high signaling overhead due to the need for resource scheduling after receiving resources sensed by neighboring users, which is inefficient and costly.
Innovation Solution
A method where neighboring users assist in channel sensing and resource allocation, reducing scheduling delays and signaling interaction overhead by performing simultaneous resource scheduling and transmission, and establishing linkages between transmitter and receiver nodes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a Tx-UE performs resource scheduling after having received resources sensed by a neighboring user, then resource allocation can be achieved, but severe delay and large signaling interaction overhead occur
Solution Approach 1:
The patent applies preliminary action by having the receiving UE (Rx-UE) perform channel sensing and determine available time-frequency resource blocks before the transmitting UE (Tx-UE) needs to schedule resources. The Rx-UE prepares resource information in advance and transmits it to the Tx-UE, so when resource allocation is needed, the Tx-UE can directly use the pre-prepared resource information without waiting for sensing results, thereby reducing scheduling delay
Solution Approach 2:
The patent uses the Rx-UE as an intermediary between the channel and the Tx-UE. Instead of the Tx-UE directly sensing the channel and allocating resources (which causes delay), the Rx-UE acts as an intermediary that performs sensing, determines resource blocks, and communicates this information to the Tx-UE. This intermediary approach streamlines the resource allocation process and reduces signaling overhead
2Productivity
If a Tx-UE performs resource scheduling after having received resources sensed by a neighboring user, then resource allocation can be achieved, but severe delay and large signaling interaction overhead occur
Solution Approach 1:
The patent extracts the channel sensing function and resource determination task from the Tx-UE and transfers them to the Rx-UE. By taking out these functions from the Tx-UE, the signaling interaction overhead at the Tx-UE is significantly reduced. The Rx-UE independently performs sensing and determines resource blocks, then communicates only the essential resource allocation information to the Tx-UE, simplifying the overall signaling process
3Ease of operation
If VRU or PUE perform channel sensing and resource allocation independently, then autonomy is maintained, but battery life is depleted faster and processing complexity increases
Solution Approach 1:
The patent merges the channel sensing function with the resource allocation function by having the Rx-UE perform both tasks. Instead of the VRU/PUE independently performing sensing and then separately allocating resources (which consumes more energy), the Rx-UE combines these functions - it senses the channel and directly uses the sensed information to determine resource blocks for allocation, reducing overall processing complexity and energy consumption while maintaining autonomous operation
Data Source
AI summary
Present application discloses a method and a device in a node for wireless communications. A first node receives a first signaling, the first signaling triggering a first channel sensing; and performs the first channel sensing, the first channel sensing used for determining a first time-frequency resource block; and transmits a second signaling, the second signaling indicating a target identifier and the first time-frequency resource block; the first signaling indicates a first identifier and a first parameter; the first identifier indicates a second node; the first parameter comprises at least one of a first resource pool, a first priority, a first time length or a first frequency-domain resource size; the first parameter is used for performing the first channel sensing; the first identifier is used for determining the target identifier. The present application can reduce the scheduling delay and signaling interaction overhead caused by inter-user coordination.