PMCH Allocation for PTT Service Continuity
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing PTT communication system fails to maintain service continuity when user equipment (UE) receiving eMBMS service moves, particularly due to poor signal quality in target cells with inadequate Physical Broadcast Channel (PBCH) channels, leading to temporary voice interruptions.
Innovation Solution
A method and system where UE determines if the adjacent target cell includes the MBSFN area used for the MBMS service, and if not, requests the network to allocate a PMCH, ensuring continuous service by configuring the PMCH resource before switching, thereby reducing the likelihood of voice interruptions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE reads PMCH resource configuration from MCCH in the target cell after cell reselection or handover, then the service can be maintained in the new cell, but for fast moving users with poor PBCH quality, the signal quality of PMCH quickly reduces before configuration is read, resulting in temporary voice interruption
Solution Approach 1:
The patent applies preliminary action by having the UE proactively request PMCH resource configuration information from the network side before actually needing to use it in the target cell. When the UE detects it is moving to a target cell (through cell reselection or handover), it sends a request message to obtain the PMCH configuration in advance, so that when the target cell's PMCH signal becomes available, the UE can immediately start receiving the service without interruption. This eliminates the time delay between cell switching and service resumption.
2Manufacturing precision
If the UE waits for good PBCH quality to read PMCH configuration in the target cell, then configuration accuracy is ensured, but fast moving users experience service interruption because the original cell's PMCH signal quality quickly deteriorates
Solution Approach 1:
The patent applies preliminary action by having the UE proactively request PMCH resource configuration information from the network side before actually needing to use it in the target cell. When the UE detects it is moving to a target cell (through cell reselection or handover), it sends a request message to obtain the PMCH configuration in advance, so that when the target cell's PMCH signal becomes available, the UE can immediately start receiving the service without interruption. This eliminates the time delay between cell switching and service resumption.
3Productivity
If the network allocates PMCH resources dynamically after UE request, then resource utilization is optimized, but the service continuity cannot be guaranteed for fast moving users with poor channel conditions
Solution Approach 1:
The patent applies preliminary action by having the UE proactively request PMCH resource configuration information from the network side before actually needing to use it in the target cell. When the UE detects it is moving to a target cell (through cell reselection or handover), it sends a request message to obtain the PMCH configuration in advance, so that when the target cell's PMCH signal becomes available, the UE can immediately start receiving the service without interruption. This eliminates the time delay between cell switching and service resumption.
Data Source
AI summary
A method and system for requesting a Physical PMCH are provided. The method includes: user equipment determines a target cell to be immigrated which is adjacent to a cell where the user equipment is located; and if the user equipment judges that a preconfigured Multicast Broadcast Single Frequency Network (MBSFN) area in the adjacent target cell does not comprise the MBSFN area used by the Multimedia Broadcast Multicast Service (MBMS) service/group call currently received by the user equipment, the user equipment requests a network side equipment to allocate a PMCH for the currently received MBMS service/group call. According to the technical solution provided in the present invention, the service continuity of the PTT communication user in a receiving state during the moving process is implemented.