IAB Node Uplink Grants with Conditional Padding BSR
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently providing seamless services due to the complexities of 5G technologies and IoT integration, particularly in managing radio link control channels and buffer status reports in integrated access backhaul nodes.
Innovation Solution
The method and apparatus involve configuring an integrated access backhaul node to manage radio link control channels by identifying the use of extended logical channel identifiers and adjusting uplink grants to optimize the transmission of padding buffer status reports, thereby enhancing service efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If padding buffer status reports are transmitted in all uplink grants, then buffer status information is always available, but wireless resources are wasted and latency increases
Solution Approach 1:
The patent changes the parameter of buffer status report transmission by introducing conditional transmission based on grant size thresholds and padding presence. Instead of transmitting BSR in all uplink grants, the system dynamically adjusts transmission behavior based on specific parameters (grant size relative to threshold, presence of padding), thereby reducing unnecessary transmissions and latency while maintaining reliability when needed.
2Reliability
If padding buffer status reports are transmitted in all uplink grants, then buffer status information is always available, but wireless resources are wasted
Solution Approach 1:
The patent applies parameter changes by making BSR transmission conditional rather than universal. The transmission decision depends on parameters such as whether padding is present and whether the grant size exceeds a configured threshold. This selective approach reduces wireless resource consumption by eliminating redundant BSR transmissions in grants where they are unnecessary, while maintaining buffer status information availability when required.
3Measurement precision
If extended logical channel identifiers are used, then channel identification precision is improved, but device complexity increases
Solution Approach 1:
The patent applies partial action by using extended logical channel identifiers selectively rather than universally. The eLCID format is employed only when necessary for precise channel identification, while standard LCID formats are used in other cases. This partial application of extended identifiers maintains channel identification precision where needed while avoiding the increased complexity that would result from universal adoption of extended formats.
Data Source
AI summary
A method performed by an integrated access backhaul (IAB) node in a wireless communication system is provided. The method comprises: receiving, from a base station, configuration information regarding an uplink (UL) grant, receiving, from the base station, configuration information regarding backhaul (BH) radio link control (RLC) channel via higher layer signaling, identifying, based on the configuration information regarding BH RLC channel, whether an extended logical channel identifier (eLCID) is used, in case that the eLCID is not used and a UL grant size is equal to or larger than a first size, not transmitting only a padding buffer status report (BSR) or not transmitting only padding or not transmitting only the padding BSR and the padding, and in case that the eLCID is used and the UL grant size is equal to or larger than a second size, not transmitting only the padding BSR or not transmitting only the padding or not transmitting only the padding BSR and the padding.