Unified MBSFN and SC-PTM Scheduling for V2X Latency Reduction
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Solution Overview
Problem
Current wireless communication systems face challenges in reducing latency for multicast-broadcast single-frequency network (MBSFN) and single-cell point-to-multipoint (SC-PTM) transmissions, particularly in vehicle-to-everything (V2X) communication scenarios, where user equipment (UE) needs to switch between non-overlapping MBSFN areas or SC-PTM cells, resulting in significant control plane delays that exceed latency requirements.
Innovation Solution
Implementing a method for receiving common scheduling information across multiple MBSFN areas and integrating it with SC-PTM transmission to enable efficient data scheduling, using either MAC control elements (CE) or physical downlink control channels (PDCCH) to reduce power consumption and signaling overhead, and introducing MCCH-less operation to minimize SIB and MCCH-related latency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If UE switches between non-overlapping MBSFN areas or SC-PTM cells, then service coverage is extended, but control plane latency increases significantly
Solution Approach 1:
The patent combines MBSFN and SC-PTM scheduling into a unified framework where a single scheduling entity manages both transmission types. This merging eliminates the need for separate scheduling procedures and reduces control plane latency while maintaining extended service coverage across multiple areas.
Solution Approach 2:
The scheduling entity is designed with multi-functionality to handle both MBSFN and SC-PTM transmissions simultaneously. This universal approach allows the system to serve multiple MBSFN areas and SC-PTM cells through a single control mechanism, reducing latency while maintaining broad coverage.
2Adaptability or versatility
If separate scheduling is used for MBSFN and SC-PTM, then transmission flexibility is maintained, but signaling overhead increases
Solution Approach 1:
The patent merges the scheduling of MBSFN and SC-PTM into a single scheduling entity that manages both transmission types. This consolidation reduces signaling overhead by eliminating redundant scheduling messages while maintaining the flexibility to adapt to different transmission requirements through unified resource allocation.
Solution Approach 2:
The unified scheduling entity performs multiple functions by handling both MBSFN and SC-PTM transmissions. This multi-functional approach reduces overall signaling overhead while preserving transmission flexibility through a single adaptive scheduling mechanism.
3Reliability
If multiple MBSFN areas are monitored separately, then service continuity is improved, but power consumption increases
Solution Approach 1:
The patent combines the monitoring of multiple MBSFN areas into a unified process managed by a single scheduling entity. This merging allows the UE to monitor multiple areas more efficiently, maintaining service continuity while reducing power consumption by eliminating redundant monitoring operations.
Solution Approach 2:
The unified scheduling entity provides multi-functional monitoring capabilities across multiple MBSFN areas. This approach ensures service continuity through comprehensive monitoring while reducing power consumption by consolidating monitoring tasks into a single efficient process.
Data Source
AI summary
In an embodiment, a user equipment (UE) receives common scheduling information which schedules the data across multiple multicast-broadcast single-frequency network (MBSFN) areas, and receives the data according to the common scheduling information. In another embodiment, the UE receives common scheduling information which schedules the data on either a physical multicast channel (PMCH) or a physical downlink shared channel (PDSCH), and receives the data on a corresponding channel according to the common scheduling information. The data may correspond to a vehicle-to-everything (V2X) message.