Disaggregated Network Node Assistance Information for Uplink Scheduling
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Solution Overview
Problem
In disaggregated wireless network nodes, the separation of robust header compression (ROHC) functions and scheduling functions across different nodes leads to challenges in determining optimal transport block sizes (TBS) for uplink grants, resulting in inefficiencies and delays due to over- or under-allocation of resources.
Innovation Solution
The implementation of assistance information sharing between the central unit (CU) and the distributed unit (DU) within a network node, allowing the DU to receive ROHC information and adjust uplink grants accordingly, thereby enabling more informed scheduling decisions based on ROHC activities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If ROHC functions and scheduling functions are separated across different nodes in disaggregated network architecture, then system flexibility and modularity are improved, but determination of optimal transport block sizes becomes difficult leading to resource allocation inefficiencies
Solution Approach 1:
The patent introduces an intermediary mechanism where the ROHC function node provides assistance information (including feedback type, packet size, and timing) to the scheduling function node. This intermediary information exchange enables the scheduling node to make informed resource allocation decisions despite the functional separation, thus maintaining resource allocation efficiency while preserving system flexibility.
2Measurement precision
If assistance information is shared between CU and DU, then scheduling accuracy is improved, but signaling overhead increases
Solution Approach 1:
The patent extracts only the essential ROHC information needed for scheduling decisions (feedback type, packet size, timing) and transmits only this extracted assistance information between CU and DU. This selective extraction minimizes signaling overhead while providing sufficient information for accurate scheduling, avoiding the need to transmit complete ROHC data sets.
3Productivity
If optimal TBS determination is achieved through ROHC information sharing, then resource utilization is improved, but system complexity increases
Solution Approach 1:
The patent segments the complex ROHC processing function into distinct components: the ROHC function node generates assistance information, which is then consumed by the scheduling function node. This segmentation allows each node to perform its specialized function independently, managing system complexity through functional decomposition while achieving optimal resource utilization through coordinated operation.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a distributed unit (DU) of a network node may receive, from one or more of a user equipment (UE), a central unit (CU) of the network node, or another network node, assistance information, wherein the assistance information indicates one or more of: robust header compression (ROHC) feedback information, uplink data related information, packet reordering timer information, congestion related information, session control information, or radio resource control (RRC) message information. The DU may perform an action associated with the UE based at least in part on the assistance information. Numerous other aspects are described.