PDSCH Resource Allocation for Broadcast-Unicast Capacity Limits
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Solution Overview
Problem
The transmission capacity of the physical downlink shared channel (PDSCH) in LTE 4G mobile communication technologies is limited, particularly for reduced capability user equipments (UEs) such as RedCap UEs, leading to poor transmission of unicast and broadcast PDSCHs, which cannot meet the increasing demands of IoT services requiring faster data rates with less delay.
Innovation Solution
A method and apparatus for determining whether to send a unicast PDSCH and/or allocating resources to a terminal based on the terminal's processing capacity, frequency resources, and priority, ensuring that the combined resources of broadcast and unicast PDSCHs do not exceed the terminal's processing capacity or preset thresholds, thereby improving transmission convenience.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the transmission capacity of PDSCH is increased to meet IoT service demands, then data rate and transmission speed improve, but the complexity of resource allocation and terminal processing capacity management increases
Solution Approach 1:
The patent changes the parameter of resource allocation by introducing dynamic determination of unicast PDSCH transmission based on broadcast PDSCH transmission occasions. The network device determines whether to send unicast PDSCH and allocates resources dynamically, adjusting transmission parameters according to terminal processing capacity and service requirements, thereby increasing data rate while managing allocation complexity through structured decision-making
Solution Approach 2:
The patent implements dynamic resource allocation where the network device determines unicast PDSCH transmission and resource allocation in real-time based on broadcast PDSCH occasions. The allocation is not static but adapts to changing conditions, allowing the system to optimize data rate while managing complexity through flexible, condition-based resource assignment
2Reliability
If multiple PDSCHs are transmitted simultaneously to improve service coverage, then transmission reliability improves, but the terminal's processing capacity is exceeded leading to reception failures
Solution Approach 1:
The patent applies preliminary anti-action by having the network device determine whether to send unicast PDSCH based on the broadcast PDSCH transmission occasion before actual transmission. This preemptive decision prevents the terminal from being overwhelmed by simultaneous PDSCH transmissions, ensuring that the total number of PDSCHs does not exceed terminal processing capacity while maintaining transmission reliability through careful coordination
Solution Approach 2:
The patent implements feedback mechanisms where the terminal reports its processing capacity and resource allocation preferences to the network device. The network device uses this feedback to determine unicast PDSCH transmission and allocate resources appropriately, creating a closed-loop system that balances transmission reliability with terminal processing capacity
3Adaptability or versatility
If unicast PDSCH resources are allocated independently of broadcast PDSCH, then resource allocation flexibility improves, but resource waste increases and transmission efficiency decreases
Solution Approach 1:
The patent merges the resource allocation decisions for broadcast and unicast PDSCH by having the network device determine unicast PDSCH transmission based on broadcast PDSCH occasions. This combined approach allows flexible resource allocation while avoiding waste, as the network device coordinates both types of transmissions to utilize available resources efficiently rather than allocating them independently
Solution Approach 2:
The patent creates a universal resource allocation framework where the same determination mechanism handles both broadcast and unicast PDSCH resources. This multi-functional approach allows the system to allocate resources flexibly across different PDSCH types while maintaining overall efficiency and minimizing waste through unified management
Data Source
AI summary
A physical downlink shared channel (PDSCH) transmission method, performed by a network-side device, in response to a transmission occasion of a broadcast PDSCH, the method including at least one of: determining whether to send a unicast PDSCH to a terminal on the transmission occasion, or determining resources allocated to and occupied by a unicast PDSCH of a terminal, The determination may be made based on several factors, such as terminal processing capacity.