SPS Resource Reselection for Packet Jitter and Latency
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Solution Overview
Problem
Existing wireless communication systems face challenges in mitigating packet jitter and latency, particularly in SPS-based transmissions, leading to issues such as inter-packet-gap, packet latency, and block error rates due to unpredictable packet arrival times and reserved subframes causing interruptions.
Innovation Solution
A transmitter device determines criteria satisfaction, such as threshold packet arrivals or latency, to trigger SPS resource reselection, selecting resources that minimize jitter spread and ensure packets arrive at scheduled times, thereby reducing dropped packets and latency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If packets are transmitted over public networks, then communication reach and connectivity are improved, but packet jitter and latency increase
Solution Approach 1:
The system performs preliminary actions by pre-calculating and storing alternative packet routes before transmission is needed. When jitter or latency is detected, these pre-prepared alternative paths enable immediate redirection without requiring real-time route computation, thus maintaining reliable packet delivery while utilizing public networks for extended reach.
2Reliability
If alternative packet routes are implemented, then packet jitter and latency are reduced, but system complexity increases
Solution Approach 1:
The system creates simplified copies of routing information and packet metadata that travel with packets through the network. These copies contain essential redirection information, allowing intermediate nodes to make routing decisions without complex centralized control, thus reducing system complexity while maintaining multiple alternative routes for jitter and latency mitigation.
3Measurement precision
If real-time monitoring of packet transmission is performed, then packet jitter and latency can be detected, but processing overhead increases
Solution Approach 1:
The system introduces intermediary elements such as timestamp markers and sequence numbers embedded in packets, along with simplified monitoring agents at network nodes. These intermediaries handle the complex measurement and detection tasks, allowing the main system to monitor packet transmission with high precision for jitter and latency detection without bearing the full processing overhead itself.
Data Source
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AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a transmitter device may determine that a criterion relating to semi-persistent scheduling (SPS) is satisfied, wherein the criterion relates to packet arrival times for SPS transmission; and trigger an SPS resource reselection based at least in part on determining that the criterion is satisfied. Numerous other aspects are provided.