UMTS Multimedia Multicast Single LUB Link Architecture
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Solution Overview
Problem
Current multimedia broadcast/multicast services in 3G networks face inefficiencies, particularly in power control for user equipment in broadcast mode and redundant data stream transmission in multicast mode, leading to suboptimal use of data transmission capacity and power management.
Innovation Solution
The implementation of a multimedia multicast service method in UMTS-type networks, where a single data stream is transmitted from the network controller to the base station using a single lub link, enabling separate power control for each user equipment through HSDPA, and dynamically switching between point-to-point and point-to-multipoint modes based on user equipment thresholds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple redundant data streams are established between RNC and node-B in 3GPP MBMS multicast mode, then reliability of data transmission is improved, but data transmission capacity is wasted and device complexity increases
Solution Approach 1:
The patent extracts and eliminates the redundant data streams from the transmission system. Instead of establishing multiple parallel data streams between RNC and node-B as required by 3GPP MBMS, the invention uses a single data stream that is duplicated only at the node-B level for distribution to multiple users. This extraction of redundancy resolves the contradiction by maintaining reliability through selective duplication while improving capacity utilization by removing unnecessary parallel transmissions.
Solution Approach 2:
The patent applies segmentation by dividing the data transmission process into two stages: a single data stream transmission from RNC to node-B, and then selective distribution to multiple users at the node-B level. This segmentation allows the system to maintain reliability through targeted duplication only where needed (at the node-B user interface) rather than duplicating throughout the entire transmission path, thereby resolving the capacity utilization issue.
2Area of stationary object
If broadcast mode is used for multimedia service, then service coverage is improved, but individual power control capability is lost
Solution Approach 1:
The patent implements dynamics by enabling the node-B to adaptively switch between broadcast and multicast modes based on real-time user presence and requirements. The system dynamically adjusts its operation: when users are present and require individual control, it switches to multicast mode with separate power control; when no users are present or broadcast is appropriate, it operates in broadcast mode for extended coverage. This dynamic adaptability resolves the contradiction between coverage and individual control.
Solution Approach 2:
The patent applies local quality by providing different transmission characteristics to different users or user groups. At the node-B level, the system can selectively apply multicast mode with individual power control to specific users while maintaining broadcast mode for general coverage. This localized differentiation of service quality allows the system to simultaneously achieve broad coverage and individual control capability where needed.
3Ease of operation
If separate communication links are established for each user equipment in multicast mode, then individual power control is enabled, but data transmission capacity is reduced
Solution Approach 1:
The patent merges multiple user data requirements into a single data stream transmission from RNC to node-B. Instead of establishing separate communication links for each user as in traditional multicast mode, the invention combines all user data needs into one consolidated stream that is then intelligently distributed and power-controlled at the node-B level. This merging approach enables individual power control through node-B-level management while dramatically improving data transmission capacity utilization.
Data Source
AI summary
A method of providing a multimedia multicast service in a digital wireless communication network, the network having a network controller for controlling of at least one base station, comprising establishing a single data stream from the network controller to the base station for transmitting of multimedia data, by means of a single lub link or transport bearer and establishing a separate communication link and a separate data queue for each user equipment in a radio cell of the base station which requests the multimedia data.