Downlink Data Transmission via Shared PDSCH and RNTI Scheduling
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Solution Overview
Problem
In existing LTE communication systems, when a base station needs to send the same data to multiple UEs, it requires multiple non-overlapping PDSCHs and corresponding PDCCH signaling, leading to inefficient data transmission and reduced system efficiency.
Innovation Solution
The base station assigns a single downlink data channel resource and sends the same data to multiple UEs using this resource, with scheduling control signaling to instruct each UE on the data channel, thereby improving resource utilization and transmission efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple non-overlapping PDSCHs are used to send the same data to multiple UEs, then each UE can receive the data reliably, but the transmission bandwidth is wasted and resource utilization decreases
Solution Approach 1:
The patent merges multiple PDSCH resources into a single shared PDSCH resource that serves multiple UEs simultaneously. The base station configures a shared PDSCH resource and uses PDCCH signaling with different RNTI values to schedule different UEs on the same physical resource, thereby eliminating redundant transmissions and saving bandwidth while maintaining reliable data delivery to all targeted UEs
Solution Approach 2:
The patent makes a single PDSCH resource universal by allowing it to serve multiple UEs through multi-user scheduling. The same physical downlink shared channel resource is allocated to multiple UEs, with each UE identified by a unique RNTI value in the PDCCH signaling, enabling one resource to perform the function of multiple dedicated resources
2Adaptability or versatility
If multiple PDCCH signaling are generated for each UE, then each UE can be scheduled individually, but the control channel overhead increases and system efficiency decreases
Solution Approach 1:
The patent combines multiple individual PDCCH signaling into a single shared PDCCH resource that carries scheduling information for multiple UEs. Instead of generating separate PDCCH messages for each UE, the system uses one PDCCH resource with differentiated RNTI values to address multiple UEs, reducing control channel overhead while preserving individual scheduling capability
Solution Approach 2:
The patent makes the PDCCH resource universal by enabling it to schedule multiple UEs simultaneously. A single PDCCH resource serves multiple UEs through the use of different RNTI values for identification, allowing the control channel to perform the function of multiple dedicated control channels and reducing overall system complexity
Data Source
AI summary
The present invention relates to the field of mobile communications, and provides a downlink data transmission method, a base station, and a user equipment. The method includes: assigning, by a base station, a first downlink data channel resource to N user equipments UEs, where N is an integer greater than 1; assigning, by the base station, a first downlink control channel resource to the N UEs; and sending, by the base station, first data on the first downlink data channel resource, and sending first scheduling control signaling on the first downlink control channel resource, where the first scheduling control signaling is used to notify the N UEs of the first downlink data channel resource, so that the N UEs receive the first data on the first downlink data channel resource.