NB IoT Terminal MBMS PRB Selection via Broadcast ID
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In narrow band IoT communication, terminals interested in receiving multimedia broadcast multicast services (MBMS) cannot determine on which physical resource block (PRB) the MBMS service is provided, leading to inefficiencies in resource utilization.
Innovation Solution
A method where a terminal receives a broadcast identifier and the total number of PRBs within the system bandwidth, selects a specific PRB using the broadcast ID, and receives the MBMS service on that PRB, allowing for efficient MBMS service delivery in NB IoT communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If MBSFN transmission is used to provide MBMS service across multiple cells, then service coverage is improved, but radio resources are wasted when user distribution is dynamic and not all resources are needed
Solution Approach 1:
The patent divides the system bandwidth into multiple PRBs and assigns different MBMS services to different PRBs. Terminals can selectively monitor only the PRBs relevant to their interested services, rather than monitoring the entire system bandwidth. This segmentation allows flexible resource allocation where resources are activated only when and where needed, reducing waste while maintaining coverage.
Solution Approach 2:
The patent introduces dynamic PRB configuration where the base station can flexibly allocate and reconfigure PRBs for MBMS services based on real-time user distribution and service demands. This dynamic allocation allows the system to adapt to changing conditions, activating resources only when services are actually needed in specific areas, thus avoiding the static resource waste inherent in MBSFN approaches.
2Reliability
If eMBMS transmission occupies the entire system bandwidth, then service delivery is ensured, but unicast and multiplexing cannot occur in the same subframe
Solution Approach 1:
The patent segments the system bandwidth into multiple PRBs that can be independently allocated. Different PRBs can be assigned to different services (MBMS or unicast) within the same subframe, enabling multiplexing. This segmentation allows the system to maintain reliable service delivery on dedicated PRBs while simultaneously supporting other services on different PRBs, resolving the contradiction between reliability and adaptability.
Solution Approach 2:
The patent creates a universal PRB allocation framework where PRBs can be dynamically assigned to different functions (MBMS services, unicast services, or left idle) based on demand. This multi-functional PRB system allows the same time-frequency resources to serve multiple purposes at different times, enabling both reliable MBMS delivery and flexible multiplexing with unicast services in the same subframe.
3Ease of manufacture
If MBSFN subframe configuration is set statically by O&M, then configuration simplicity is maintained, but resources cannot be dynamically adjusted according to user distribution and traffic load
Solution Approach 1:
The patent replaces static MBSFN subframe configuration with dynamic PRB-level allocation that can be adjusted in real-time based on user distribution and traffic load. The base station monitors service demands and user locations, then dynamically configures which PRBs are allocated to MBMS services and which remain available for other uses. This dynamic approach maintains operational simplicity while enabling flexible adaptation to changing conditions.
Solution Approach 2:
The patent changes the allocation parameter from static subframe-level MBSFN configuration to dynamic PRB-level resource allocation. By changing the granularity and flexibility of the allocation parameter, the system can adapt to varying traffic loads and user distributions without sacrificing configuration simplicity. The base station maintains control through standardized procedures while allowing flexible parameter adjustments at the PRB level.
4Loss of information
If a terminal monitors the entire system bandwidth for MBMS services, then service detection is comprehensive, but power consumption and processing complexity increase
Solution Approach 1:
The patent segments the system bandwidth into multiple PRBs and enables terminals to identify and monitor only the specific PRBs allocated to their interested MBMS services. Instead of scanning the entire system bandwidth, terminals receive service configuration information that indicates which PRBs contain their target services, allowing selective monitoring. This segmentation dramatically reduces power consumption and processing complexity while maintaining complete service detection for the terminal's interests.
Solution Approach 2:
The patent enables terminals to self-configure their monitoring behavior by providing them with service-specific PRB allocation information. Terminals use this information to automatically determine which PRBs to monitor without requiring continuous full-bandwidth scanning or complex network coordination. This self-service approach allows terminals to optimize their power consumption and processing while ensuring they detect all services they are interested in receiving.
Data Source
AI summary
Provided are a method of receiving a multimedia broadcast multicast service (MBMS) service by a terminal in a wireless communication system, and an apparatus supporting the method. The method may include: receiving from a base station a broadcast identifier (ID) and the total number of physical resource blocks (PRBs) within a system bandwidth; selecting a specific PRB from one or more PRBs within the system bandwidth by using the received broadcast ID and total number of PRBs; and receiving the MBMS service on the selected specific PRB.