Idle Terminal Detection for Multicast Resource Optimization
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Solution Overview
Problem
In multicast or broadcast services, there is a waste of radio resources due to the lack of accurate verification of idle state terminals, leading to unnecessary transmission by base stations even when no terminals are receiving data, which increases as data traffic grows.
Innovation Solution
A method and apparatus that determine the number of idle state terminals by transmitting a base station signal with a radio frame structure including a ranging region set and a ranging code set, allowing terminals to randomly select and transmit these, and determining their presence or type based on detection values, thereby controlling data transmission accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If base stations continuously transmit MBS data to maintain macro-diversity, then service continuity is improved, but radio resource waste increases
Solution Approach 1:
The patent implements a feedback mechanism where idle state terminals periodically send feedback signals to base stations indicating their presence and reception status. Base stations use this feedback information to dynamically adjust transmission decisions, continuing transmission only when terminals confirm receipt needs, thereby avoiding unnecessary radio resource consumption while maintaining service continuity.
Solution Approach 2:
The patent transforms the static continuous transmission model into a dynamic adaptive transmission model. Base stations adjust their transmission behavior in real-time based on terminal feedback status, switching between continuous transmission and suspension modes according to actual service needs, thus optimizing the balance between reliability and resource efficiency.
2Loss of energy
If base stations verify presence of idle state terminals, then radio resource efficiency is improved, but system complexity increases
Solution Approach 1:
The patent employs self-service mechanisms where idle state terminals autonomously send feedback signals without requiring complex base station-initiated verification procedures. Terminals automatically indicate their presence and reception status using predefined feedback formats, simplifying the overall system architecture while achieving accurate terminal verification and radio resource optimization.
3Measurement precision
If paging mechanism is used to induce idle state terminal association, then terminal identification is improved, but signaling delay increases
Solution Approach 1:
The patent implements preliminary action by having idle state terminals proactively send feedback signals before base stations need to verify their presence. Terminals continuously or periodically transmit feedback information indicating their reception status, allowing base stations to immediately make transmission decisions without initiating paging or verification procedures, thus eliminating signaling delays while maintaining accurate terminal identification.
Data Source
AI summary
Disclosed are a method and apparatus for determining the number of idle state terminals that determines the number of terminals in an idle state and controls data transmission for a multicast or broadcast service (MBS), and a method of controlling data transmission. The method of determining the number of idle state terminals in the MBS according to the present invention includes: transmitting, by a transmitter, a base station signal for verifying the number of idle state terminals; determining whether a radio terminal signal transmitted from an idle state terminal using the base station signal is present, or a the number of radio terminal signal types; and determining the number of idle state terminals based on whether the radio terminal signal is present or the number of radio terminal signal types.