Sidelink Resource Reservation Prioritization for Wireless UEs
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In wireless communication systems, sidelink resource reservation messages may not be received by all nearby User Equipments (UEs) due to collisions or interference, leading to inefficient resource utilization and coordination between UEs.
Innovation Solution
Configuring UEs with prioritization rules for sidelink resource reservation forwarding, allowing them to monitor and select resource reservations based on scheduled transmission times, processing times, and message receipt times, and forward relevant information in coordination messages to improve resource allocation and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a transmitting UE broadcasts a self-reservation message to indicate reserved sidelink resources, then resource reservation information is provided to nearby UEs, but some nearby UEs may not receive the message due to collisions or interference
Solution Approach 1:
The patent introduces intermediate UEs that act as relays to forward reservation messages from the transmitting UE to other nearby UEs. When a UE receives a reservation message, it can forward this message to other UEs in its vicinity, ensuring that reservation information reaches all relevant UEs even if the original broadcast was not received due to collisions or interference.
Solution Approach 2:
The patent divides the reservation message forwarding function into multiple segments performed by different UEs. Instead of relying on a single broadcast from the transmitting UE, the message is segmented and redistributed through multiple intermediate UEs, each forwarding to different subsets of nearby UEs, thereby improving overall delivery reliability.
2Reliability
If all received reservation messages are forwarded to other UEs, then complete resource reservation information is distributed, but communication overhead and processing complexity increase
Solution Approach 1:
The patent applies local quality by having each UE make local decisions about which reservation messages to forward based on its specific situation. UEs evaluate factors such as whether they have already received the message, the importance of the reservation information, and their own communication capabilities, then selectively forward only the most relevant messages rather than all received messages.
Solution Approach 2:
The patent implements partial action by having UEs forward only a subset of received reservation messages rather than all messages. Each UE selectively forwards messages based on prioritization criteria, performing a partial forwarding action that balances information distribution with reduced processing overhead.
3Reliability
If multiple UEs forward the same reservation message repeatedly, then information reaches more UEs, but resource wastage and interference increase
Solution Approach 1:
The patent introduces feedback mechanisms where UEs track and report which reservation messages have been successfully received and forwarded. This feedback information allows the network to identify which messages have already achieved sufficient coverage, preventing redundant retransmissions and reducing overall message traffic in the system.
Solution Approach 2:
The patent implements preliminary action by having UEs check whether a reservation message has already been forwarded by other UEs before re-forwarding it. This preliminary check prevents redundant transmissions by identifying messages that have already achieved adequate distribution coverage, thereby reducing unnecessary energy consumption and interference.
Data Source
AI summary
Methods, systems, and devices for wireless communication are described. In some examples, a sidelink user equipment (UE) may be configured with one or more prioritization rules for sidelink resource reservation forwarding. The UE monitor for one or more sidelink messages that indicate a set of sidelink resource reservations associated with one or more other UEs. In some examples, the UE may receive a sidelink message and one or more other sidelink messages that indicate reservations of other sidelink resources associated with other UEs. The UE may select one or more sets of sidelink resources for indicating in a coordination message in accordance with the one or more prioritization rules for sidelink resource reservation and based on the sidelink messages. The UE may transmit the coordination message including an indication of the one or more sets of sidelink resources based on the selecting.