Intra-UE Multiplexing for Dynamic Packet Prioritization
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Solution Overview
Problem
In next-generation wireless communication systems like 5G, there is a challenge in efficiently managing and prioritizing uplink (UL) and downlink (DL) transmissions, particularly in scenarios where urgent transmissions need to preempt ongoing non-urgent ones, and handling overlapping symbols with different priority designations, which complicates resource allocation and power management.
Innovation Solution
The implementation of mechanisms for signaling prioritization of UL and DL transmissions using higher layer signaling and resource configurations, allowing for dynamic handling of intra-UE traffic multiplexing, and the use of semi-static Hybrid Automatic Repeat Request (HARQ) codebooks to manage parallel DL transmissions, along with modifying bit fields to designate resource usage prioritization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If grant-based packet transmission is scheduled, then resource allocation is confirmed, but transmission latency increases when lower priority packets are sent
Solution Approach 1:
The patent implements dynamic prioritization where the UE can switch between grant-based and grant-free transmission modes based on real-time packet priority. When high-priority packets arrive, the system dynamically selects grant-free transmission to reduce latency; when low-priority packets are scheduled, it uses grant-based transmission for reliability confirmation.
Solution Approach 2:
The system changes the transmission mode parameter from static grant-based allocation to dynamic selection between grant-based and grant-free modes. This parameter change allows the UE to adapt transmission characteristics (latency vs. reliability) based on packet priority, resolving the contradiction between confirmed resource allocation and transmission speed.
2Productivity
If multiple packets with different priorities are multiplexed, then resource utilization improves, but packet prioritization complexity increases
Solution Approach 1:
The patent segments the transmission resource into two distinct modes: grant-based resources for low-priority packets and grant-free resources for high-priority packets. This segmentation allows the UE to handle different priority levels through separate, simplified pathways rather than complex multiplexing logic, reducing prioritization complexity while maintaining resource utilization.
Solution Approach 2:
The network node acts as an intermediary by providing separate resource configurations for different priority levels. Instead of requiring the UE to complexly manage prioritization itself, the network mediates by allocating specific resources for high-priority grant-free transmission and low-priority grant-based transmission, simplifying the UE's decision-making process.
3Speed
If grant-free transmission is used for urgent packets, then transmission speed increases, but resource allocation control decreases
Solution Approach 1:
The network node performs preliminary action by pre-configuring grant-free resources and providing clear prioritization rules before the UE needs to make transmission decisions. This advance preparation allows the UE to quickly transmit urgent packets without complex real-time resource allocation control, achieving both high speed and maintained control through pre-established agreements.
Data Source
AI summary
Some embodiments of this disclosure include apparatuses and methods for multiplexing uplink (UL) and/or downlink (DL) data transmission packets in user equipment (UE). In some embodiments, the UE may receive a resource configuration from a network node including one or more parameters for establishing a communication channel. The UE may receive a command from the network node indicating a UL grant for packet transmission from the UE. While preparing to transmit a first packet corresponding to the UL grant, the UE may receive a second packet having a higher priority designation, wherein the second packet includes an overlapping symbol with the first packet. The UE may transmit the second packet in view of this higher priority.