MBMS Measurement Time Scheduling to Prevent MCCH Overlap
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Solution Overview
Problem
In 3G mobile telecommunications systems, User Equipment (UE) without double receivers face interruptions in receiving MBMS service during Inter-Frequency/Inter-RAT measurements due to overlapping measurement times with UTRAN's MCCH information transmission, leading to missed critical MCCH information.
Innovation Solution
A method to set Inter-Frequency/Inter-RAT measurement times based on the transmission schedule of MBMS point-to-multipoint Control Channel (MCCH) information, ensuring the measurement times do not overlap with MCCH transmission, allowing UE to receive necessary information during measurements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If UE performs Inter-Frequency/Inter-RAT measurement during MBMS service, then measurement capability is improved, but reception of MCCH information is interrupted
Solution Approach 1:
The patent applies preliminary action by having the UE report measurement results before the actual measurement takes place. The network uses this advance information to schedule measurements in a way that avoids overlapping with critical MCCH transmission times, thereby preventing reception interruption while maintaining measurement capability.
Solution Approach 2:
The patent implements dynamics by allowing flexible adjustment of measurement timing based on real-time network conditions and UE state. The measurement schedule is dynamically optimized to avoid fixed conflicts with MCCH transmissions, enabling the system to adapt between measurement needs and reception reliability requirements.
2Adaptability or versatility
If UE without double receivers performs Inter-Frequency measurement, then measurement function is added, but current cell reception is interrupted
Solution Approach 1:
The UE reports measurement results in advance before the actual measurement execution. This preliminary reporting allows the network to pre-schedule measurements during periods when MBMS reception is least critical, thereby adding measurement functionality while minimizing disruption to continuous cell reception.
Solution Approach 2:
The patent implements periodic action by scheduling measurements at specific intervals rather than continuously. The network determines optimal measurement periods based on the periodic nature of MBMS transmissions, allowing measurement functionality to be added without causing continuous reception interruption.
3Ease of operation
If measurement time is set independently of MCCH transmission schedule, then measurement flexibility is improved, but overlap with MCCH transmission occurs
Solution Approach 1:
The patent applies feedback by having the UE report measurement results to the network, which then uses this information to adjust the measurement schedule. This feedback mechanism ensures that measurement flexibility is maintained while avoiding overlaps with MCCH transmissions, preventing information loss.
Solution Approach 2:
The patent implements parameter changes by dynamically adjusting measurement timing parameters based on the MCCH transmission schedule. The network modifies measurement start times, durations, and frequencies to align with network conditions, thereby maintaining operational flexibility while preventing information loss during critical transmission periods.
Data Source
AI summary
A method for measuring Inter-Frequency/Inter-RAT (Radio Access Technology) in Multimedia Broadcast/Multicast Service (MBMS) includes: setting an Inter-Frequency/Inter-RAT measurement time to prevent Inter-Frequency/Inter-RAT measurement time from overlapping constantly the transmission time of MCCH information; performing Inter-Frequency/Inter-RAT measurement by a UE according to the Inter-Frequency/Inter-RAT measurement time. In the present invention, the Inter-Frequency/Inter-RAT measurement time can be prevented from overlapping constantly the time when UTRAN transmits the MCCH information, so that the problem that the UE cannot receive MCCH information during Inter-Frequency/Inter-RAT measurement time may be solved. In the invention, a measurement time setting device is also provided for implementing Inter-Frequency/Inter-RAT measurement in Multimedia Broadcast/Multicast Service.