Conditional Radio Resources for 5G Transport Block Repetition
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Solution Overview
Problem
In 5G NR networks, insufficient transport block repetitions occur due to late packet arrival caused by jitter, leading to degraded reliability in uplink and downlink communications, where existing technologies fail to ensure the configured number of repetitions are performed.
Innovation Solution
The introduction of conditional activation of radio resources for transport block repetition, allowing for the activation of additional resources when the initial set is insufficient, ensuring the configured number of repetitions are completed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If transport block repetition is performed using only the initially configured radio resources, then the device complexity is low and ease of operation is maintained, but the reliability deteriorates when packet arrival is delayed due to jitter causing insufficient repetitions
Solution Approach 1:
The patent applies preliminary action by pre-configuring additional radio resources before they are needed. When a transport block repetition fails to complete due to packet arrival delay, the system activates pre-allocated additional radio resources to ensure the repetition is completed. This resolves the contradiction by having resources ready in advance without requiring complex real-time resource allocation decisions.
Solution Approach 2:
The patent introduces an intermediary mechanism (additional radio resources configured by the network) that mediates between the initial radio resources and the transport block repetition completion requirement. When the initial resources are insufficient, the intermediary resources serve as a bridge to complete the repetition, thereby improving reliability without requiring the transmitting device to make complex resource management decisions.
2Reliability
If additional radio resources are pre-configured for conditional activation, then the reliability of transport block repetition is improved, but the device complexity and resource overhead increase
Solution Approach 1:
The patent applies dynamics by making the activation of additional radio resources conditional rather than static. The additional resources are configured in advance but only activated when needed (when transport block repetition fails to complete). This dynamic activation approach ensures reliability improvement while avoiding unnecessary resource consumption when the initial resources are sufficient.
Solution Approach 2:
The patent changes the parameter of radio resource availability from fixed to variable through conditional activation. The system transitions between different states of resource availability based on whether transport block repetition completes successfully. This allows the system to adapt resource usage to actual needs, improving reliability only when necessary and reducing overall resource overhead.
Data Source
AI summary
A user equipment (UE) is configured to receive configuration information comprising allocation information for a downlink repetition bundle with a configured number of repetitions and conditional resources associated with the downlink repetition bundle, determine whether the conditional resources associated with the downlink repetition bundle are to be activated and decode a transport block from physical downlink shared channel (PDSCH) received over multiple resources from at least one of the downlink repetition bundle and the conditional resources associated with the downlink repetition bundle.