Relay UE Control Information Scheduling Identification
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In device-to-device (D2D) communication, particularly in UE-to-network relay scenarios, there is a challenge in determining which user equipment (UE) is scheduled using downlink control information (DCI), as existing methods lack clarity on how the relay UE distinguishes between scheduling for itself and other remote UEs.
Innovation Solution
The proposed solution involves the relay UE determining, based on specific information within the first control information, whether it or a remote UE is scheduled, using parameters such as radio network temporary identifiers (RNTIs), payload sizes, physical downlink control channels (PDCCHs), and subframes, allowing it to differentiate and act accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the relay UE receives DCI for both the relay UE and remote UE, then the control information can be sent to multiple UEs, but the relay UE cannot determine which UE is scheduled by the DCI
Solution Approach 1:
The patent uses different Radio Network Temporary Identifiers (RNTIs) as unique identifiers to mark control information intended for different UEs. The relay UE monitors PDCCH with multiple RNTIs (its own C-RNTI and remote UE's C-RNTI), and by detecting which RNTI is used to scramble the DCI, the relay UE can identify whether the scheduling is for itself or the remote UE, thus resolving the identification difficulty
Solution Approach 2:
The patent introduces an intermediary identification mechanism where the RNTI acts as a mediator between the network device and the relay UE. The network device selects appropriate RNTIs when generating DCI, and the relay UE uses these RNTIs to determine the scheduling target, effectively mediating the ambiguous scheduling situation
2Adaptability or versatility
If the relay UE monitors PDCCH with multiple RNTIs, then it can receive control information for both itself and remote UE, but the complexity of monitoring and processing increases
Solution Approach 1:
The patent segments the PDCCH monitoring process into distinct parts: monitoring for the relay UE's own C-RNTI and monitoring for the remote UE's C-RNTI. This segmentation allows the relay UE to systematically handle multiple RNTIs by treating them as separate monitoring tasks, reducing the perceived complexity through structured organization of the monitoring process
Solution Approach 2:
The patent makes the PDCCH monitoring mechanism universal by enabling it to handle multiple RNTIs through the same basic process. The relay UE uses a unified monitoring approach that works for both its own scheduling and remote UE scheduling, eliminating the need for separate complex mechanisms for different UE types
Data Source
Figure 1~2
Figure 3
Figure 4
AI summary
Embodiments of the present invention disclose a control information processing method and system, a first device, and a second device. The method includes: receiving, by the first device, first control information sent by a network device; determining, by the first device based on first information, that the first control information is used to schedule a target device, where the target device is one of the first device and at least one second device, and the first information is information related to the first control information; and when the target device is one of the at least one second device, determining, by the first device, second control information based on resource information that is used for data transmission and that is included in the first control information, and sending the second control information to the target device, so that the target device transmits data based on the second control information; or when the target device is the first device, transmitting, by the first device, data based on the first control information. According to the embodiments of the present invention, the first device can determine, by using the first information related to the first control information, a device scheduled by using the first control information.