Multi-Code Physical Channels for High-Speed MBMS Transmission
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Solution Overview
Problem
Conventional mobile communications systems are limited in providing multimedia broadcast/multicast services (MBMS) beyond 256 kbps due to restrictions in the maximum transmission speed of secondary common control physical channels (SCCPCH).
Innovation Solution
The method involves configuring and transmitting multi-code physical channels to enable higher-speed point-to-multipoint multimedia services by transmitting multi-channel code information to user equipment (UE), allowing the UE to configure and receive data through multiple secondary common control physical channels (SCCPCH), thereby supporting multimedia broadcast or multicast services (MBMS) at higher speeds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a single secondary common control physical channel (SCCPCH) is used for MBMS transmission, then the system maintains simplicity in channel configuration, but the transmission speed is limited to 256 kbps
Solution Approach 1:
The patent divides the data transmission into multiple parallel physical channels (SCCPCH 1, SCCPH 2, etc.), each carrying a portion of the MBMS data. By segmenting the single-channel transmission into multi-channel parallel transmission, the system achieves higher aggregate transmission speeds while maintaining manageable complexity through standardized channel configuration procedures
Solution Approach 2:
The patent combines multiple physical channels to work together for a single MBMS service. Multiple SCCPCHs are merged into a unified transmission system where data can be distributed across channels and reassembled at the receiver, effectively combining the capacity of multiple channels to exceed the 256 kbps limitation of a single channel
2Productivity
If multiple physical channels are configured for MBMS transmission, then the transmission speed exceeds 256 kbps, but the system complexity increases
Solution Approach 1:
The patent creates a universal channel configuration framework where multiple SCCPCHs can be used for different MBMS services simultaneously. The same channel configuration methods and procedures are applied universally across all channels, allowing the system to manage multiple channels with standardized processes rather than requiring separate management mechanisms for each channel
Solution Approach 2:
The patent changes the configuration parameters of the physical channels, specifically assigning different channelization codes to multiple SCCPCHs. By modifying the code domain parameters and establishing clear mapping relationships between logical channels and physical channels, the system enables higher transmission capacity while maintaining organized channel management through parameter-based differentiation
3Speed
If multi-code physical channels are used, then higher-speed multimedia services are enabled, but the configuration and management of channel codes becomes more complex
Solution Approach 1:
The patent performs preliminary channel code configuration and assignment before actual MBMS data transmission begins. The network side pre-configures the multi-code physical channels and provides channel code information to user equipment in advance through RRC signaling, so that when data transmission starts, both sides are already synchronized on the code configuration, reducing the difficulty of real-time code management and detection
Data Source
AI summary
The present invention relates to a method and apparatus for providing at least one user equipment (UE) with a point-to-multipoint multimedia service through two or more common physical channels in a mobile communications system. A radio network transmits a point-to-multipoint multimedia service through a plurality of physical channels using multiple codes. A user equipment (UE) receives multiple channel code information through a control channel from the radio network, configures a plurality of physical channels using the received multiple channel code information and receives the point-to-multipoint multimedia service through the configured physical channels.