Sidelink Reservation Updates Using Change-Only Advertisement Messages
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Solution Overview
Problem
The existing inter-UE coordination in sidelink communication for resource reservation in wireless networks involves significant signaling overhead due to the need to transmit the entire list of tracked sidelink reservations each time, which can burden the system and reduce performance.
Innovation Solution
Transmission of advertisement messages that indicate only changes to the tracked sidelink reservations, using a reservation overview element (ROE) and optional reservation detail elements (RDEs), allowing UEs to update their reservations efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the entire list of tracked sidelink reservations is transmitted each time, then resource reservation information is fully updated, but signaling overhead increases significantly
Solution Approach 1:
The patent extracts and transmits only the changed portion of the sidelink reservation information (indicated by the bitmap) rather than the entire list. The bitmap identifies which reservations have changed, and only those specific reservation details are transmitted, thereby reducing signaling overhead while maintaining information completeness.
Solution Approach 2:
The reservation information is segmented into multiple components: a bitmap indicating which reservations changed, and optional RDEs containing details only for changed reservations. This segmentation allows selective transmission of necessary information rather than transmitting the complete reservation list.
2Loss of energy
If only changes to sidelink reservations are transmitted, then signaling overhead is reduced, but message structure complexity increases
Solution Approach 1:
The patent introduces a bitmap as an intermediary element that simplifies the message structure. The bitmap acts as an index or map that indicates which reservations have changed, allowing the receiver to efficiently identify and process only the relevant changed information without complex parsing of the entire reservation list.
3Loss of information
If the entire list of tracked sidelink reservations is transmitted each time, then all UEs have up-to-date reservation information, but system performance decreases due to overhead
Solution Approach 1:
The patent extracts and transmits only the changed portion of the sidelink reservation information (indicated by the bitmap) rather than the entire list. The bitmap identifies which reservations have changed, and only those specific reservation details are transmitted, thereby reducing signaling overhead while maintaining information completeness.
Solution Approach 2:
Instead of transmitting the complete reservation list (excessive action), the patent transmits only the necessary changed information (partial action). This partial transmission is sufficient to keep all UEs updated on reservation changes without the burden of transmitting redundant unchanged information, thus improving system performance.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a first user equipment (UE) may generate a message for indicating sidelink resource reservation information, wherein the sidelink resource reservation information includes a set identifier (ID) associated with a set of sidelink resource reservations that are tracked by the first UE, and wherein the resource reservation information further includes information that indicates a change to a subset of the set of sidelink resource reservations. The UE may transmit the message to a second UE. Numerous other aspects are described.