MBMS Configuration on Multiple Carriers
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Solution Overview
Problem
Conventional wireless communication systems face challenges in efficiently configuring Multimedia Broadcast Multicast Service (MBMS) on multiple carriers, leading to potential degradation of unicast services and increased handovers, which can result in call dropping and mobility issues.
Innovation Solution
A method is introduced to configure MBMS transmission by determining overlapping MBSFN subframe configurations on multiple carrier frequencies, allowing MBMS signals to be received without interrupting unicast subframes, thereby reducing the need for multiple receivers and maintaining unicast performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If MBMS is provided on a shared carrier frequency with unicast service using time division multiplexing, then MBMS service can be delivered to users, but unicast service performance degrades due to resource sharing and interruptions
Solution Approach 1:
The patent segments MBMS services across multiple carrier frequencies, allowing different carriers to be dedicated to specific MBMS services while maintaining unicast services on other carriers. This segmentation prevents resource conflicts and performance degradation by isolating MBMS and unicast traffic on separate frequency resources.
2Adaptability or versatility
If a UE interrupts reception of unicast service to receive MBMS service on a non-serving carrier, then MBMS service reception is enabled, but unicast service performance and mobility measurements deteriorate
Solution Approach 1:
The patent utilizes the frequency dimension by configuring MBMS services on non-serving carrier frequencies that are separate from the serving carrier. This allows UEs to receive MBMS services on alternative frequency resources without interrupting unicast service reception on the primary serving carrier, thereby maintaining mobility measurement accuracy and unicast service performance.
3Reliability
If multiple receivers are implemented for MBMS reception on non-serving carriers, then MBMS service reception is improved, but device complexity and power consumption increase
Solution Approach 1:
The patent enables the single receiver to perform multiple functions by time-sharing and frequency-hopping mechanisms. The receiver can switch between serving and non-serving carriers to receive both unicast and MBMS services sequentially, eliminating the need for multiple dedicated receivers while maintaining service quality.
4Adaptability or versatility
If handovers are increased to enable MBMS service on non-serving carriers, then service coverage is improved, but call dropping probability increases
Solution Approach 1:
The patent performs preliminary configuration of MBMS services on non-serving carriers before actual service delivery. The network pre-configures UEs with MBMS service information including frequency, timing, and resource allocation, so that when MBMS services are activated, UEs can immediately receive services without performing handovers, thereby reducing call dropping probability while maintaining service coverage.
Data Source
AI summary
Embodiments described herein provide methods and systems for enabling MBMS transmission in at least one MBMSFN area. The method can include determining a first MBMS configuration comprising at least a first MBSFN subframe configuration for MBMS transmission on a first carrier frequency, and a second configuration comprising of at least a second blank or partly blank subframe configuration on a second carrier frequency, wherein at least one first MBSFN subframe at least partly overlaps in time with at least one second subframe. The method can further include configuring a second network node with the first MBMS configuration for MBMS signal transmission on the first carrier frequency. The method can further include configuring a third network node with the second configuration on the second carrier frequency.