Uplink Logical Channel Mapping for Wireless Networks
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Solution Overview
Problem
Current communication systems face challenges in efficiently managing uplink logical channels in wireless communication systems, particularly in determining optimal mapping between uplink logical channels and transport channels, which affects radio resource utilization and quality of service.
Innovation Solution
A method and apparatus for determining and controlling the mapping of uplink logical channels to either an uplink contention-based channel or an uplink shared channel based on triggers such as buffer load, channel load, latency thresholds, and service type, allowing dynamic allocation of resources and operation in discontinuous reception modes, enabling parallel transmission across multiple channels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If uplink logical channels are mapped to transport channels using fixed mapping rules, then system complexity is reduced, but radio resource utilization efficiency deteriorates
Solution Approach 1:
The patent implements dynamic mapping determination where the network device selects mapping rules based on real-time channel conditions, service types, and buffer states. The mapping between uplink logical channels and transport channels is no longer fixed but adapts dynamically to current system conditions, allowing optimal resource allocation while managing complexity through structured decision frameworks.
Solution Approach 2:
The patent changes multiple parameters including buffer threshold values, channel load conditions, service type classifications, and latency requirements to determine appropriate mapping rules. By monitoring and responding to changes in these parameters, the system optimizes radio resource utilization without requiring excessively complex decision-making processes.
2Productivity
If dynamic mapping adjustment is implemented based on real-time conditions, then radio resource utilization efficiency is improved, but system complexity increases
Solution Approach 1:
The patent segments the uplink logical channels into different types (data channels, control channels, signaling channels) and applies specific mapping rules to each type. This segmentation allows the system to handle complexity in a modular fashion, processing different channel types independently with dedicated mapping strategies rather than requiring a single complex decision process for all channels.
Solution Approach 2:
The system implements feedback mechanisms where the network device monitors transmission outcomes, buffer states, and channel conditions, then adjusts mapping rules accordingly. This closed-loop control allows the system to learn from past performance and optimize future mappings, reducing the need for overly complex predictive algorithms while maintaining high transmission efficiency.
3Reliability
If multiple mapping options are provided for different service types, then service quality is improved, but device complexity increases
Solution Approach 1:
The patent applies different mapping rules and criteria tailored to specific service types, logical channel types, and channel conditions. Each service type (e.g., ultra-reliable low-latency communication, enhanced mobile broadband, machine type communication) receives customized mapping treatment appropriate to its requirements, rather than applying a single universal mapping strategy. This localized optimization improves QOS while managing complexity through type-specific rule sets.
Data Source
AI summary
There is provided a method comprising receiving, at a user device, control information usable for determining whether at least one uplink logical channel is to be transmitted using at least one of a first uplink transport channel and a second uplink transport channel, determining, in dependence on said information, a mapping between the at least one uplink logical channel and at least one of the first uplink transport channel and second uplink transport channel and causing the at least one uplink logical channel to be transmitted using the at least one uplink transport channel to which the at least one uplink logical channel is mapped.