Multicast Backhaul Setup via Join Message Forwarding
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Solution Overview
Problem
The existing method of transmitting Multimedia Broadcast/Multicast Service (MBMS) in Femtocell networks requires significant network resources and imposes a heavy workload on devices like gateways, edge routers, and access nodes due to the inability to establish multicast backhaul in the fixed network, resulting in inefficient use of resources and service delivery.
Innovation Solution
A method and apparatus in a mobile base station to aid the upper network device in establishing multicast backhaul in the fixed network by obtaining and forwarding multicast join messages from user terminals, enabling efficient multicast service delivery by converting unicast transmissions to multicast within the fixed network.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If unicast transmission is used in the fixed network for multicast service delivery, then the service can be delivered to individual users, but network resources are wasted and device workload increases
Solution Approach 1:
The patent replaces the mechanical unicast transmission system with a multicast transmission system in the fixed network. By substituting the transmission mechanism from point-to-point unicast to one-to-many multicast, the system achieves efficient service delivery while reducing network resource consumption. The BSR forwards multicast join messages to upper network devices, enabling multicast backhaul establishment and replacing resource-intensive unicast transmissions.
2Ease of operation
If unicast transmission is used for multicast service, then individual user service delivery is possible, but the workload on gateways, edge routers, and access nodes increases significantly
Solution Approach 1:
The patent extracts the multicast transmission function from the mobile core network and implements it in the fixed network. By taking out the multicast capability and placing it in the fixed network infrastructure, upper network devices can establish multicast backhaul channels, thereby reducing the processing workload on gateways, edge routers, and access nodes while maintaining service delivery capability.
3Ease of manufacture
If multicast backhaul is not established in the fixed network, then network devices can operate with standard unicast protocols, but network resource efficiency decreases
Solution Approach 1:
The patent implements preliminary action by having the BSR proactively forward multicast join messages to upper network devices before actual service delivery. This preliminary establishment of multicast backhaul channels enables efficient multicast transmission from the outset, preventing resource waste that would occur with subsequent unicast transmissions. The upper network devices prepare multicast pathways in advance based on join message analysis.
Data Source
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AI summary
Method and apparatus for decreasing multi-cell feedback overhead is provided in the present invention. Wherein a mobile user terminal equipment utilizes a first period to feedback short-term channel direction information of a serving base station, utilizes a second period to feedback long-term channel direction information of neighboring base stations, further, the mobile user terminal equipment utilizes a third period to feedback long-term relative amplitude information, utilizes a fourth period to feedback short-term relative phase information, wherein the first period is shorter than the second period, and the third period is longer than the fourth period.