SC-MCCH Scheduling via PDCCH for SC-PTM Services
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current MBMS technologies lack an effective solution for scheduling Single-Cell Point-to-Multipoint (SC-PTM) services, as the existing methods are not suitable for transmitting Single-Cell Multicast Control Channel (SC-MCCH) on the Physical Downlink Control Channel (PDCCH).
Innovation Solution
The base station transmits the SC-MCCH on a PDCCH of a unicast subframe, including frequency domain scheduling information and a mapping relationship between the SC-PTM service identifier and the G-RNTI, allowing User Equipment (UE) to obtain the SC-PTM service on corresponding time-frequency resources, thereby scheduling the SC-PTM service effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the existing MBMS methods are used for transmitting SC-MCCH, then the transmission can be performed on MBSFN area, but the scheduling of SC-PTM services cannot be effectively achieved
Solution Approach 1:
The patent segments the control channel transmission by creating a dedicated SC-MCCH within the PDCCH structure, separating it from the traditional MCCH transmission on PMCH. This segmentation allows SC-PTM services to have their own dedicated control signaling path, enabling effective scheduling while maintaining reliable transmission through purpose-built control mechanisms.
Solution Approach 2:
The patent introduces G-RNTI (Group Radio Network Temporary Identifier) as an intermediary mechanism to bridge the PDCCH and SC-PTM services. This intermediary allows the control channel to effectively schedule and manage multicast services by providing a dedicated identification and signaling mechanism that connects the control plane with the user plane for SC-PTM operations.
2Productivity
If SC-MCCH is transmitted on PDCCH of unicast subframe, then transmission efficiency is improved, but the method complexity increases compared to existing MBMS approaches
Solution Approach 1:
The patent makes the PDCCH structure universal by enabling it to carry both unicast control information and SC-MCCH for multicast services. This multi-functionality allows the same physical downlink control channel to serve multiple purposes - traditional unicast scheduling and new SC-PTM service scheduling - thereby improving transmission efficiency without requiring entirely separate channel structures.
Solution Approach 2:
The patent changes the parameter of control channel location by moving SC-MCCH transmission from the PMCH (Physical Multicast Channel) to the PDCCH (Physical Downlink Control Channel). This parameter change in transmission location enables more flexible scheduling and improves efficiency by utilizing the established PDCCH infrastructure and processing paths that are already optimized for control signaling.
3Ease of operation
If the traditional MCCH notification mechanism is used, then UEs can monitor MCCH information changes, but it is not suitable for SC-PTM service scheduling requirements
Solution Approach 1:
The patent introduces dynamic scheduling information for SC-PTM services through the SC-MCCH transmitted on PDCCH. This dynamic mechanism allows the network to flexibly allocate and reallocate multicast resources in real-time based on service requirements and UE conditions, making the system adaptable to varying SC-PTM service needs while maintaining UE monitoring capabilities through standardized control signaling procedures.
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
The present invention provides a single-cell multicast control channel (SC-MCCH) sending method and apparatus, and an SC-PTM receiving method and apparatus. The SC-MCCH sending method comprises: a base station generates SC-MCCH information for indicating configuration information of a single-cell point-to-multipoint (SC-PTM) service; the base station sends frequency-domain scheduling information of an SC-MCCH over a physical downlink control channel (PDCCH); the base station sends the SC-MCCH over a physical downlink shared channel (PDSCH), wherein the SC-MCCH comprises: a mapping relationship between a temporary mobile group identity (TMGI) of the SC-PTM service and a group radio network temporary identity (G-RNTI) of the SC-PTM service on the PDCCH, and time-domain position information of the SC-PTM service. The present invention resolves the problem that there is no effective solution for scheduling an SC-PTM service in the related art, thereby achieving scheduling of the SC-PTM service.