Single-DRB Packet Multiplexing for Variable Transmission Quality
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Solution Overview
Problem
Existing telecommunications systems face inefficiencies in resource allocation due to the need to set up multiple data radio bearers (DRBs) with the highest quality parameters to accommodate varying data packet requirements, particularly in services like extended reality (XR), leading to unnecessary resource allocation and overheads.
Innovation Solution
Implementing a system where data packets are transmitted using variable transmission quality parameters and periodicities within the same DRB, determined by information in the data packet headers or through mapping mechanisms, allowing different data packet types to be treated differently based on their specific requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple separate DRBs are set up for different data streams with varying quality requirements, then each data stream can be transmitted with appropriate quality parameters, but the number of DRBs increases and system overhead increases
Solution Approach 1:
The patent merges multiple data streams with different quality requirements into a single DRB by introducing a packet priority indicator field in the PDCP layer. This allows the network to differentiate and handle high-priority and low-priority packets within the same bearer, eliminating the need to set up separate DRBs for each quality requirement while maintaining appropriate service levels for each stream type.
Solution Approach 2:
The patent applies local quality differentiation by implementing priority-based handling at the packet level within a single DRB. The packet priority indicator allows specific packets to be treated differently based on their importance, enabling fine-grained quality control without requiring separate bearers for each quality level. This local differentiation occurs at the PDCP layer through priority-aware scheduling and transmission.
2Device complexity
If a single DRB is used for multiple data streams, then the number of DRBs is reduced and overhead is lowered, but all data streams must be transmitted with the highest quality parameters required by any single stream
Solution Approach 1:
The patent introduces dynamic quality parameter adjustment based on packet priority. Instead of using static highest-quality parameters for all packets, the system dynamically selects transmission parameters (such as modulation and coding scheme, retransmission policies, scheduling priorities) according to the packet priority indicator. This allows low-priority packets to use more efficient, lower-quality transmission modes while high-priority packets receive enhanced transmission resources.
Solution Approach 2:
The patent changes transmission parameters dynamically based on packet priority. The packet priority indicator triggers different parameter sets for transmission, including but not limited to modulation order, code rate, retransmission timing, and scheduling weight. This parameter differentiation within a single DRB allows the system to optimize resource usage by matching transmission quality to actual service requirements for each packet type.
3Reliability
If separate DRBs are established for different quality requirements, then service-specific quality can be guaranteed, but setting up new DRBs incurs additional overhead and consumes limited DRB resources
Solution Approach 1:
The patent performs preliminary classification of data packets by inserting a packet priority indicator at the PDCP layer before transmission. This pre-marking of packets with priority information enables the network to immediately apply appropriate quality handling without requiring separate DRB setup. The preliminary action of priority tagging allows subsequent efficient differentiation and quality assurance within the same bearer, avoiding repeated DRB establishment overhead.
Data Source
AI summary
Method and system for communicating data with user equipment (UE) comprising establishing a data radio bearer, DRB, between a base station and the UE and transmitting data packets between the base station and the UE through the DRB, wherein data packets are transmitted by multiplexing data packets for different data packet types at different periodicities in a time division multiplexed data stream.