MBMS-Specific BWP Allocation for Concurrent Wireless Transmission
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently managing multimedia broadcast and multicast services (MBMS) transmissions during 3GPP New Radio (NR) communications, particularly in coordinating simultaneous MBMS and unicast transmissions within the same bandwidth part (BWP), which affects the quality and reliability of service delivery.
Innovation Solution
Implementing a group scheduling mechanism that allows user equipment (UE) devices to receive MBMS transmissions over specifically allocated BWPs, while also supporting simultaneous unicast transmissions, by using MBMS-specific BWPs and resource allocation strategies that enable time division multiplexing and peer-to-peer transmissions based on UE capabilities and network indications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If MBMS and unicast transmissions share the same BWP, then bandwidth utilization is improved, but transmission reliability deteriorates due to resource conflicts
Solution Approach 1:
The patent segments the bandwidth part (BWP) into separate MBMS-specific BWPs and unicast BWPs. By dividing the shared resource into dedicated segments for different transmission types, the system achieves both efficient bandwidth utilization and reliable transmission without resource conflicts between MBMS and unicast services.
Solution Approach 2:
The patent introduces a scheduling mechanism as an intermediary that coordinates between MBMS and unicast transmissions. This mediator manages resource allocation and timing, allowing both transmission types to operate simultaneously without conflicts while maintaining high bandwidth utilization efficiency.
2Reliability
If separate MBMS-specific BWPs are allocated, then transmission reliability is improved, but device complexity increases
Solution Approach 1:
The patent designs MBMS-specific BWPs that can serve multiple functions: they support both point-to-multipoint MBMS transmissions and point-to-point unicast transmissions. This multi-functionality reduces the need for completely separate dedicated channels, thereby limiting the increase in device complexity while maintaining transmission reliability.
Solution Approach 2:
The patent implements dynamic BWP configuration where the network can flexibly allocate and reconfigure MBMS-specific BWPs based on current traffic conditions and UE capabilities. This dynamic approach allows the system to adapt to varying requirements without requiring complex static configurations, managing device complexity while ensuring reliable transmission.
3Reliability
If time division multiplexing is used for MBMS and unicast, then resource conflicts are reduced, but service latency increases
Solution Approach 1:
The patent transitions from time-domain multiplexing to frequency-domain resource allocation by introducing MBMS-specific BWPs at different frequency locations. This dimensional change allows MBMS and unicast transmissions to occur simultaneously without time-based conflicts, eliminating the latency penalty associated with time division multiplexing while maintaining reduced resource conflicts.
Data Source
AI summary
User equipment devices (UEs) may receive multimedia broadcast and multicast service (MBMS) transmissions over a bandwidth part (BWP) specifically allocated for MBMS point-to-multipoint (PTM) transmissions, or over MBMS-specific resources configured for PTM transmissions within a UE-dedicated BWP. The network (e.g. base station) may configure the MBMS-specific BWP for the UE for the PTM transmissions per serving cell. The MBMS-specific BWP may be used for downlink transmissions, and may be cell specific or UE specific per serving cell. The base station may provide MBMS PTM scheduling information per BWP to the UE, may indicate whether a UE-dedicated BWP may be used for PTM scheduling and transmission, and may provide the corresponding scheduling configuration when applicable. The UE may communicate its various capabilities related to MBMS reception and simultaneous reception of PTM and point-to-point (PTP) transmissions to the base station to aid the base station in scheduling communications of the UE.