Uplink Feedback for MBMS Resource Management
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Solution Overview
Problem
Multimedia broadcast multicast services (MBMS) in wireless networks are unable to efficiently manage wireless resources or provide optimized data services due to the lack of uplink control information reception, limiting their ability to manage resources and provide multimedia services effectively.
Innovation Solution
A method and apparatus for transmitting control information using an uplink, where network devices and terminals receive and transmit reception states to determine the activation or inactivation of MBMS services, potentially switching from multicast or broadcast to unicast mode based on terminal reception states, allowing for efficient resource management and service optimization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If MBMS provides only downlink control information, then the system complexity is reduced, but the ability to manage wireless resources efficiently deteriorates
Solution Approach 1:
The patent introduces uplink feedback mechanisms where terminals send reception state information (ACK/NACK) and buffer status reports to the base station. This feedback enables the network to make informed decisions about resource allocation, MBMS activation/inactivation, and mode switching between broadcast and unicast, thereby improving wireless resource management efficiency while maintaining manageable system complexity through standardized feedback protocols.
2Device complexity
If MBMS provides only downlink control information, then the transmission protocol is simplified, but the ability to provide optimized data services deteriorates
Solution Approach 1:
The patent implements dynamic adaptation mechanisms where the transmission mode can switch between broadcast (MBMS) and unicast based on terminal reception states. When reception quality is good, broadcast mode is used for efficient resource utilization; when reception quality deteriorates, the system dynamically switches to unicast mode for optimized service delivery. This dynamic behavior enables the system to adapt to varying channel conditions and service requirements while maintaining a relatively simple base protocol structure.
Solution Approach 2:
The patent utilizes parameter changes in transmission parameters (modulation scheme, coding rate, resource allocation) based on feedback from terminals. The base station adjusts these parameters according to reception state information to optimize data service delivery. This allows the system to provide service optimization without fundamentally changing the protocol architecture, thereby maintaining simplicity while enhancing adaptability.
3Device complexity
If the network cannot receive uplink control information, then the wireless resource allocation is less complex, but the service management efficiency deteriorates
Solution Approach 1:
The patent establishes feedback loops where terminals report reception states and buffer statuses to the network. This enables the base station to efficiently manage services by making data-driven decisions about MBMS activation, inactivation, and mode switching. The feedback mechanism provides the network with necessary control information without significantly increasing allocation complexity, as the feedback follows standardized formats and processing procedures.
Data Source
AI summary
The present invention relates to a system for providing multimedia service, comprising a network device which provides multimedia services using a wireless network, and a terminal which receives the multimedia services from the network device. The network device may receive feedback on the multimedia service receiving state from the terminal that receives the multimedia services, and control the multimedia services based on the received feedback.