MBSFN Subframe Configuration for LTE Paging Flexibility
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Solution Overview
Problem
In LTE networks, the configuration of MBSFN subframes varies with different paging scenarios, leading to difficulties in channel estimation for user equipment and resource coordination between network elements, particularly between MCE and eNode B.
Innovation Solution
A method and apparatus for configuring MBSFN subframes, where subframes #1, #2, #3, #6, #7, and #8 are predetermined as MBSFN subframes, with #0, #4, and #9 excluded, allowing user equipment to determine MBSFN subframes based on system broadcast messages and simplifying network resource coordination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If MBSFN subframe configuration varies with different paging scenarios, then paging flexibility is improved, but channel estimation difficulty and resource coordination complexity increase
Solution Approach 1:
The patent segments the MBSFN subframe configuration by excluding specific subframes (#0, #4, and #9) from being configured as MBSFN subframes. This segmentation approach divides the configuration space into fixed excluded portions and flexible configurable portions, allowing paging flexibility in configurable subframes while maintaining consistent channel estimation behavior in excluded subframes, thereby reducing resource coordination complexity.
Solution Approach 2:
The patent applies preliminary action by pre-defining which subframes cannot be configured as MBSFN subframes (#0, #4, and #9) before the actual MBSFN configuration takes place. This preliminary exclusion establishes a consistent baseline for channel estimation across all paging scenarios, while still allowing flexibility in configuring MBSFN subframes from the remaining subframes.
2Adaptability or versatility
If MBSFN subframe configuration varies with different paging scenarios, then paging flexibility is improved, but user equipment channel estimation difficulty increases
Solution Approach 1:
The patent segments the subframe configuration by identifying specific subframes (#0, #4, and #9) that must not be configured as MBSFN subframes. This creates a consistent reference framework for user equipment to perform channel estimation, while still allowing MBSFN configuration flexibility in other subframes. The segmented approach ensures UE can reliably identify non-MBSFN subframes for accurate channel estimation.
Solution Approach 2:
The patent applies local quality by assigning different properties to different subframes: subframes #0, #4, and #9 are locally designated as non-MBSFN subframes with specific channel estimation requirements, while other subframes can have flexible MBSFN configuration. This local differentiation allows paging flexibility in certain subframes while maintaining consistent channel estimation behavior in specific localized subframes.
3Adaptability or versatility
If all subframes are potentially configurable as MBSFN subframes, then resource utilization flexibility is improved, but network element coordination complexity increases
Solution Approach 1:
The patent segments the total subframe set by excluding specific subframes (#0, #4, and #9) from MBSFN configuration eligibility. This segmentation reduces the coordination complexity for network elements (MCE and eNode B) by pre-establishing which subframes are excluded, while still maintaining flexibility in configuring MBSFN subframes from the remaining pool, thus balancing resource utilization flexibility with coordination simplicity.
Solution Approach 2:
The patent applies preliminary action by pre-determining the exclusion of specific subframes (#0, #4, and #9) from MBSFN configuration before the actual resource allocation and coordination process. This preliminary action simplifies the coordination between MCE and eNode B by establishing a fixed reference framework, while still allowing flexible MBSFN configuration in the remaining subframes for optimal resource utilization.
Data Source
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AI summary
The present invention discloses a method for acquiring/configuring a multicast/broadcast over single frequency network (MBSFN) subframe and an acquisition apparatus, wherein the method including the following steps that: an MBSFN subframe configuration rule is set which regulates the subframes configured as MBSFN subframes comprise 6 subframes numbered as #1, #2, #3, #6, #7 and #8; a user equipment acquires a system broadcast message from a base station, wherein MBSFN subframe configuration information is included in the system broadcast message; and the UE determines the subframes that are configured as MBSFN subframes according to the configuration rule and the MBSFN subframe configuration information. The present invention simplifies the network configuration.