Wireless Handover with Service Indicators for MBMS Continuity
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Solution Overview
Problem
Current wireless communication systems, such as 3GPP LTE, face challenges in efficiently performing handovers for broadcast services, particularly in providing multimedia broadcast multicast services (MBMS) during user equipment mobility, leading to suboptimal service continuity and resource allocation.
Innovation Solution
A method for handover in wireless communication systems that involves transmitting measurement reports from user equipment to serving cells with specific service indicators, receiving handover commands, and allocating resources for MBMS, ensuring seamless service continuity by informing target cells of service details and resource availability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If handover is performed without including service indicators in measurement reports, then the handover process is simpler and faster, but MBMS service continuity cannot be ensured during handover
Solution Approach 1:
The measurement report message includes service indicators (such as MBMS service information, frequency, area ID) in advance before handover execution. This preliminary inclusion of service-related information allows the target cell to be pre-evaluated for service continuity capability, ensuring reliable MBMS service during handover without adding complex post-handover procedures
Solution Approach 2:
Service indicators act as an intermediary element between the user equipment's service requirements and the network's handover decision-making process. These indicators carry essential service information through the handover procedure, enabling the network to make informed decisions that maintain both service continuity and procedural efficiency
2Productivity
If detailed service information is transmitted during handover, then resource allocation for MBMS is improved, but signaling overhead increases
Solution Approach 1:
Only essential service indicators (such as service ID, frequency, area ID) are extracted and included in the measurement report and handover messages, rather than transmitting complete service detail information. This extraction of critical elements enables effective resource allocation decisions while minimizing signaling overhead and avoiding unnecessary information transmission
3Adaptability or versatility
If target cell service capability is evaluated using measurement reports with service indicators, then MBMS service availability is improved, but measurement and detection complexity increases
Solution Approach 1:
The measurement report message structure is enhanced to include service indicators that serve multiple functions: they identify the user equipment's service interests, enable target cell capability evaluation, and guide resource allocation decisions. This multi-functional use of the measurement report improves service availability without requiring separate dedicated measurement procedures for each service type
Data Source
AI summary
The present invention relates to a method for a user equipment performing a handover in a wireless communication system, and more specifically, comprises the following steps: transmitting to a serving cell a measurement report message on a target cell including an indicator related to a specific service; receiving from the serving cell a handover command message including information on the specific service, which is provided by the target cell; receiving resource allocation information on the specific service from the target cell using the information on the specific service; and transmitting a handover completion message to the target cell.