5G NR Group Communication Through Aligned UE BWPs
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Solution Overview
Problem
In 5G NR communication, broadcast/multicast/groupcast data transmission is hindered by non-aligned active BWPs of user equipment (UEs), preventing simultaneous communication on a uniform frequency domain resource.
Innovation Solution
A communication method that aligns UE BWPs through dedicated BWP configuration and PDCCH scrambling with G-RNTI, allowing for broadcast/multicast/groupcast transmission on a unified frequency domain resource.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If each UE has independently configured active BWP in frequency domain, then each UE can receive information on its own active BWP, but broadcast/multicast/groupcast data cannot be transmitted on a uniform frequency domain resource to multiple UEs
Solution Approach 1:
The patent introduces a common BWP as an intermediary frequency domain resource that all UEs in a group can access simultaneously. This common BWP acts as a mediator that enables uniform resource transmission while individual UEs maintain their dedicated BWPs for unicast communication, thus resolving the contradiction between individual adaptability and group transmission efficiency
Solution Approach 2:
The patent segments the frequency domain resources into two parts: dedicated BWPs for individual UE unicast communication and a common BWP for group broadcast/multicast/groupcast transmission. This segmentation allows each UE to have its own optimized BWP while simultaneously enabling efficient group communication on the shared common BWP resource
2Productivity
If the network device sends PDCCH to a group of UEs on a frequency domain resource, then the PDCCH can be transmitted, but some UEs cannot receive it because their active BWP does not align with the transmitted resource
Solution Approach 1:
The common BWP is designed with universal access capability, allowing all UEs in the group to monitor and receive PDCCH transmissions on the same frequency domain resource regardless of their individual dedicated BWP configurations. This multi-functionality enables the common BWP to serve as a universal reception point for group communication
3Quantity of substance
If multiple UEs receive PDSCH on the same time-frequency resource for broadcast/multicast/groupcast, then resource utilization improves, but UEs with non-aligned active BWPs cannot simultaneously receive the data
Solution Approach 1:
The common BWP serves as a shared intermediary resource where multiple UEs can simultaneously receive PDSCH transmissions. By decoupling the group communication resource from individual UE active BWPs, the system achieves high resource utilization while maintaining flexibility in individual BWP configurations for unicast services
Data Source
AI summary
The present disclosure relates to communication methods, apparatus, and devices. In one example method, a terminal device receives first indication information, where the first indication information indicates a first frequency domain resource, the first frequency domain resource is a subset of a frequency domain resource corresponding to a first bandwidth part (BWP), and the first BWP is a dedicated BWP of the terminal device. The terminal device receives a first physical downlink control channel (PDCCH) on the first BWP, where the first PDCCH is scrambled by using a group-radio network temporary identifier (G-RNTI), and the first PDCCH schedules a first physical downlink shared channel (PDSCH) within a range of the first frequency domain resource. The terminal device receives second indication information including a first frequency domain width. The terminal device receives the first PDSCH on the first frequency domain resource.