5G NR Resource Block Grouping for Unicast–Multicast Alignment
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Solution Overview
Problem
In 5G NR communication systems, there are inefficiencies in aligning resource block groupings for unicast and multicast transmissions, leading to potential disruptions among UEs in a multicast MBS group due to domain misalignments.
Innovation Solution
Methods and systems are developed to determine domain-efficient RB groupings and align parameters for unicast and multicast operations, ensuring proper resource allocation and decoding of GC-PDSCH within a Common Frequency Resource (CFR) by defining MBS RBGs, RB bundles, and PRGs, and applying scheduling adjustments to avoid misalignments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If unicast and multicast transmissions use separate resource block groupings, then each transmission type can be optimized independently, but domain misalignments occur causing disruptions among UEs in multicast MBS group
Solution Approach 1:
The patent merges unicast and multicast resource block groupings by establishing domain-efficient RB groupings that are common to both transmission types. This alignment ensures that resource blocks are consistently organized across different transmission modes, preventing domain misalignments and reception disruptions while maintaining optimized resource allocation for both unicast and multicast services.
2Productivity
If resource blocks are aligned for both unicast and multicast, then domain misalignments are prevented, but flexibility in optimizing each transmission type independently is reduced
Solution Approach 1:
The patent applies local quality by allowing different resource block grouping configurations within specific domains while maintaining alignment at the boundary levels. This enables optimized resource allocation for specific multicast services within their designated resource blocks while ensuring that the overall grouping structure remains aligned with unicast transmissions, thus maintaining both efficiency and flexibility.
3Reliability
If domain-efficient RB groupings are implemented, then precoding assumptions are guaranteed across UEs, but additional signaling and coordination overhead is required
Solution Approach 1:
The patent establishes universal resource block grouping rules that serve multiple functions simultaneously: they ensure precoding assumption consistency across all UEs in the multicast group, provide a common framework for both unicast and multicast transmissions, and reduce the need for UE-specific configuration signaling. This multi-functional approach guarantees reliability while minimizing additional signaling overhead.
Data Source
AI summary
Described herein are systems and methods for resource block determination for multicast and broadcast transmissions. According to various embodiments, a unicast physical downlink shared channel (U-PDSCH) transmission and a group common physical downlink shared channel (GC-PDSCH) transmission are received; a resource block (RB) configuration for decoding the U-PDSCH transmission and GC-PDSCH transmission is determined, wherein the RB configuration specifies a mapping of at least one of the U-PDSCH and the GC-PDSCH to one or more RB collections; and the GC-PDSCH within a Common Frequency Resource (CFR) in decoded according to the RB configuration. According to various embodiments, the determined RB configuration includes a specification of size and location for the one or more RB collections which at least one of the U-PDSCH and the GC-PDSCH is mapped to. In various embodiments, RB collection size and location may be determined relative to CRB indexes and/or a CFR.