Broadcast Multicast Frequency Region Allocation
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Solution Overview
Problem
The existing MBSFN technology in LTE-A systems is limited by the requirement that all nodes must use the same system bandwidth and center frequency to provide a broadcast/multicast service, leading to inefficient utilization of radio resources and reduced spectrum efficiency.
Innovation Solution
A method and apparatus for receiving and transmitting broadcast/multicast services that allow for the allocation of frequency resources within a specific cell, enabling the use of different frequency regions and center frequencies, thereby allowing multiple nodes to provide the same service without interference, and optimizing the use of radio resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If all nodes use the same system bandwidth and center frequency for MBSFN transmission, then synchronized broadcast service can be provided across the MBSFN area, but radio resource utilization efficiency deteriorates and spectrum efficiency is reduced
Solution Approach 1:
The patent segments the frequency resources by introducing the concept of frequency region information that divides the system bandwidth into multiple regions. Each node transmits MBSFN services in specific frequency regions rather than using the entire system bandwidth, allowing different nodes to use different frequency regions simultaneously. This segmentation enables multiple nodes to provide broadcast services without interfering with each other, thereby improving radio resource utilization while maintaining synchronized service delivery.
Solution Approach 2:
The patent applies local quality by allowing different nodes to have different frequency resource allocations tailored to their local conditions. Each node receives frequency region information indicating which specific frequency regions it should use for MBSFN transmission. This localized frequency allocation optimizes spectrum usage by matching transmission characteristics to local network conditions and service requirements, improving overall system efficiency.
2Reliability
If multiple nodes transmit the same MBMS data simultaneously in synchronization, then service interference is reduced and seamless broadcast service is achieved, but frequency resource flexibility is limited
Solution Approach 1:
The patent introduces frequency region allocation as an additional dimension for resource management. Instead of all nodes using the same frequency resources, the system now operates in multiple frequency dimensions simultaneously. Each node is assigned specific frequency regions through frequency region information, allowing synchronized transmission across different frequency dimensions. This dimensional expansion provides both service continuity through synchronization and flexibility through frequency diversity.
Solution Approach 2:
The patent changes the frequency allocation parameters by introducing frequency region information that specifies which portions of the system bandwidth each node should use. This parameter change allows nodes to transmit synchronized MBMS data while using different frequency resources, thereby maintaining service continuity while increasing frequency resource flexibility and enabling more adaptable network configurations.
Data Source
AI summary
The broadcast/multicast service according to the present invention is transmitted/received in a partial frequency region rather than the entire system bandwidth of a cell. The user equipment of the present invention may receive information regarding the frequency region set in the cell for receiving the broadcast/multicast service and receive the broadcast/multicast service over the frequency region based on the information.