Dynamic Scheduling Augments Semi-Persistent MBS Resource Allocation
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Solution Overview
Problem
Current semi-persistent scheduling (SPS) for multicast and/or broadcast services (MBS) in 5G wireless communications lacks clear configurations for base stations and user equipment (UEs) to handle failed transmissions and larger data packets that exceed SPS resource capacity.
Innovation Solution
Dynamic resource allocation by base stations to augment SPS resources, using group-common or UE-specific temporary identifiers for radio network temporary identifiers (RNTIs), allowing for retransmissions and efficient handling of larger data transmissions through dynamic scheduling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If semi-persistent scheduling (SPS) is used for MBS transmissions, then resource allocation efficiency is improved, but the system cannot handle failed transmissions or larger data packets that exceed SPS resource capacity
Solution Approach 1:
The patent implements dynamic scheduling mechanisms that allow the base station to adaptively allocate resources for MBS transmissions. When SPS resources are insufficient or transmissions fail, the system dynamically adjusts resource allocation through downlink control information (DCI) messages, enabling flexible handling of varying data sizes and retransmission requirements while maintaining the efficiency benefits of SPS for regular transmissions.
Solution Approach 2:
The patent segments the resource allocation into two parts: SPS resources for regular MBS transmissions to maintain efficiency, and dynamic resources for handling failed transmissions and larger data packets. This segmentation allows the system to benefit from both the efficiency of semi-persistent scheduling and the adaptability of dynamic scheduling for exceptional cases.
2Reliability
If dynamic resources are allocated to augment SPS resources, then reliability of data transmission is improved, but system complexity increases
Solution Approach 1:
The patent implements feedback mechanisms where UEs report reception status of SPS transmissions to the base station. Based on this feedback, the base station determines when to allocate dynamic resources for retransmissions or additional data, improving reliability while keeping the system responsive and adaptive rather than continuously complex.
Solution Approach 2:
The patent configures UEs in advance with SPS resources and the capability to receive dynamic scheduling. This preliminary configuration reduces runtime complexity by establishing resource allocation patterns beforehand, allowing the system to handle reliability requirements through pre-planned resource structures rather than complex real-time decisions.
Data Source
AI summary
A method in a base station for managing multicast and/or broadcast services (MBS) includes transmitting first data associated with a first MBS to a plurality of UEs, using semi-persistent scheduling (SPS) resources: scrambling a downlink control information (DCI) using a group RNTI (G-RNTI) shared by the plurality of UEs; transmitting the DCI to the plurality of UEs, to schedule transmitting of second data; and transmitting second data associated with the first MBS or a second MBS to at least one of the plurality of UEs, using dynamic scheduling.