Wireless Device Feedback for Unicast Broadcast Switching
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Solution Overview
Problem
In wireless communication systems, there is a need for efficient management of radio resources to quickly switch between unicast and broadcast/multicast transmission based on the number of users, as current methods result in wastage of resources due to parallel unicast and broadcast transmissions.
Innovation Solution
A method where a wireless device receives a service via unicast, detects reception of the service via multicast and/or broadcast, and informs the network of successful reception, allowing the network to minimize the duration of parallel unicast and broadcast transmissions and optimize radio resource usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the network performs unicast transmission and broadcast transmission in parallel for a sufficiently long period of time to ensure UE successful reception, then the reliability of service delivery is improved, but the radio resource wastage increases
Solution Approach 1:
The patent implements a feedback mechanism where the UE sends an acknowledgment message to the network when it successfully receives the broadcast service. This feedback allows the network to stop unicast transmission once broadcast reception is confirmed, eliminating resource wastage while maintaining reliable service delivery. The network transitions from uncertain parallel transmission to precise feedback-driven transmission termination.
2Productivity
If the network quickly switches from unicast to broadcast transmission when user number increases, then the radio resource efficiency is improved, but the risk of incomplete service delivery to UEs increases
Solution Approach 1:
The patent applies preliminary action by having the network initiate broadcast transmission while maintaining unicast transmission simultaneously for a transition period. This ensures that UEs have enough time to switch from unicast to broadcast reception without losing service continuity. The unicast transmission acts as a preliminary buffer that prevents service interruption during the mode switch.
3Reliability
If the network maintains unicast transmission for a long period after initiating broadcast, then the reliability of service delivery is improved, but the device complexity and resource management complexity increase
Solution Approach 1:
The patent uses feedback from UE acknowledgment messages to automatically control the duration of parallel unicast and broadcast transmission. When the network receives confirmation that UEs have successfully received the broadcast service, it automatically terminates unicast transmission. This feedback-driven approach simplifies resource management by eliminating the need for manual configuration of parallel transmission duration.
Data Source
AI summary
A method and apparatus for transmitting assistant information for a quick switch between broadcast and unicast transmission in a wireless communication system is provided. A wireless device receives, from a network, a service via unicast. A wireless device detects reception of the service via multicast and/or broadcast while receiving the service via unicast. A wireless device informs the network of the reception of the service via the multicast and/or the broadcast.