Dynamic Distance Control for Contention-Based Forwarding
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Solution Overview
Problem
In wireless communications systems, contention-based forwarding (CBF) techniques face delays due to stations calculating wait times based on a theoretical maximum communication range, which can be longer than the actual range, leading to inefficiencies in message relaying.
Innovation Solution
Implementing dynamic distance control by configuring user equipment (UE) to use an actual communication range for CBF signaling, where the dynamic range is indicated within the message, allowing stations to determine a minimum wait time based on this actual range, reducing buffering time and latency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If stations calculate wait times based on theoretical maximum communication range, then message relaying coverage is maximized, but latency increases due to longer buffering times
Solution Approach 1:
The patent implements dynamic distance control by allowing the maximum communication range to be adjusted based on actual channel conditions. The gNB configures a dynamic maximum range that is shorter than the theoretical maximum when channel conditions warrant it, enabling stations to calculate more accurate and shorter wait times, thereby reducing latency while maintaining reliable message relaying within the actual achievable range.
2Device complexity
If a fixed maximum communication range is used for CBF signaling, then configuration is simple, but efficiency decreases due to excessive buffering time
Solution Approach 1:
The patent changes the parameter of maximum communication range from a fixed theoretical value to a dynamic configurable value. The gNB provides configuration information that adjusts the maximum range parameter based on actual network conditions, allowing stations to optimize their wait time calculations and improve message relaying efficiency without significantly increasing configuration complexity.
3Reliability
If theoretical maximum range is used for wait time calculation, then all potential receivers are covered, but actual communication efficiency is reduced
Solution Approach 1:
The patent implements feedback mechanisms where the gNB monitors actual channel conditions and communication outcomes, then adjusts the dynamic maximum range configuration accordingly. This feedback loop ensures that the maximum range parameter reflects actual achievable communication distances, allowing stations to calculate appropriate wait times that reduce buffering delays while maintaining coverage of all actual receivers.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. A user equipment (UE) may be configured for contention-based forwarding (CBF) to relay a message toward a destination. The UE may receive signaling indicating a configuration for CBF. The CBF configuration may be associated with a maximum communication range for CBF signaling. The UE may receive a message to relay toward the destination using CBF. The message may include a first indication of a dynamic communication range for the CBF which may be less than or equal to the maximum communication range. The UE may determine a timer value to retransmit the message based on the dynamic communication range. When a timer set to the timer value expires, the UE may retransmit the message to nearby stations and include an indication of the dynamic communication range with the message.