Uplink Access Control for Wireless Multicast Terminals
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Solution Overview
Problem
Conventional wireless communication systems face uplink congestion and wastage of radio resources during multicast/broadcast services due to simultaneous response messages from multiple terminals, leading to increased interference and prolonged setup times for radio bearers.
Innovation Solution
Implementing a method to manage uplink communication by transmitting parameters to terminals, applying them to a predetermined test, and selectively responding, thereby evaluating the need for parameter transmission and updating based on received responses to determine the type of radio bearer to set up, such as point-to-point or point-to-multipoint, reducing unnecessary message transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If all terminals transmit response messages simultaneously to the network, then the network can quickly determine the number of interested terminals, but uplink congestion and interference occur leading to wasted radio resources
Solution Approach 1:
The network divides terminals into multiple groups and assigns different response opportunities to each group. Terminals in different groups transmit response messages at different times rather than simultaneously, which segments the uplink traffic and reduces congestion and interference while still allowing the network to count total responses efficiently.
2Reliability
If the network sets up point-to-point radio bearers for all terminals, then each terminal receives dedicated service, but radio resources are wasted when many terminals are actually served through point-to-multipoint
Solution Approach 1:
The network changes the radio bearer configuration parameter based on the counted number of terminals. When the number of terminals is small, point-to-point bearers are established for reliable dedicated service. When the number is large, the network switches to point-to-multipoint bearers to efficiently share radio resources among multiple terminals, thus avoiding resource waste while maintaining service quality.
3Ease of operation
If the network transmits detailed access information to all terminals, then terminals can make informed access decisions, but transmission of access information consumes radio resources
Solution Approach 1:
The network transmits access information selectively rather than to all terminals. By using group-based response mechanisms and counting, the network obtains sufficient information to make bearer setup decisions without transmitting detailed access information to every terminal, thus reducing radio resource consumption while still enabling informed access decisions where necessary.
Data Source
AI summary
In a wireless communication system, an apparatus and method for managing an uplink communication between a network and a plurality of terminals is achieved by transmitting a response condition parameter from the network to the plurality of terminals subscribing to a multicast service. The parameter is associated with controlling the uplink communication of the plurality of terminals. The terminal then applies the response control parameter to a predetermined test and responds to the network if the terminal determines that it is qualified to respond to the network in response to a result of the predetermined test. The network evaluates whether the parameter needs to be transmitted to the plurality of terminals and whether the parameter needs to be updated based on at least part of responses received by the network.