Sidelink PSCCH Resource Indication via Control Sequences
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Solution Overview
Problem
In a 5G New Radio (NR) system, there is a challenge in indicating the actual time-frequency resource position of the Physical Sidelink Control Channel (PSCCH) to User Equipment (UE) without the participation of a base station, as methods used for downlink communication are not applicable for sidelink communication.
Innovation Solution
The method involves detecting control channel indication sequences at pre-set positions in each time slot to determine the time-frequency resource positions of PSCCHs, using these sequences to quickly identify the resource positions and enable flexible configuration of PSCCHs, with a one-to-one corresponding relationship allowing support for multiple PSCCHs with different functions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If downlink control information indication methods are used in sidelink, then the base station can control resource allocation, but the method cannot be applied since the base station does not participate in sidelink transmission
Solution Approach 1:
The patent enables User Equipment (UE) to autonomously determine PSCCH time-frequency resource positions without base station intervention. The UE uses pre-configuration information and detection of indication sequences to self-determine resource positions, making the system self-service capable and eliminating dependency on base station control for sidelink resource allocation.
Solution Approach 2:
The patent introduces indication sequences as an intermediary mechanism to convey resource position information. These sequences serve as a mediator between the pre-configuration and the actual PSCCH resource positions, enabling indirect indication of resource locations without requiring direct base station control messages.
2Adaptability or versatility
If blind detection is used to find PSCCH resources, then resource allocation flexibility is achieved, but detection complexity and time increase
Solution Approach 1:
The indication sequences act as intermediaries that guide the blind detection process. Instead of searching the entire time-frequency space, the UE detects these sequences first, which provide clues about PSCCH resource positions, thereby reducing the search space and detection complexity while maintaining allocation flexibility.
Solution Approach 2:
The patent uses pre-configuration information and pre-positioned indication sequences to prepare the detection process in advance. By having indication sequences placed at predetermined positions before actual data transmission, the system reduces the complexity of real-time resource location determination.
3Adaptability or versatility
If multiple PSCCHs are supported with different functions, then communication versatility improves, but resource management complexity increases
Solution Approach 1:
The patent segments the control channel resources by introducing multiple indication sequences that correspond to different PSCCH functions. Each indication sequence can be associated with specific PSCCH purposes (e.g., scheduling, feedback, coordination), allowing the system to support multiple communication functions while managing resources through distinct indication mechanisms.
Solution Approach 2:
The indication sequence mechanism serves multiple functions: it indicates resource positions for different PSCCH types, supports various sidelink communication modes, and enables flexible resource allocation. This universal indication approach allows a single mechanism to handle diverse communication requirements without proportionally increasing system complexity.
Data Source
AI summary
Disclosed are an information transmission method for a sidelink, and a user equipment and a computer-readable storage medium. The method comprises: detecting a control channel indication sequence at a pre-set position of each time slot; and based on the detected control channel indication sequence, determining, in the time slot where the sequence is located, a time-frequency resource position where a corresponding physical sidelink control channel is located, wherein the control channel indication sequences correspond to the physical sidelink control channels on a one-to-one basis. By applying the solution, an actual time-frequency resource position of a PSCCH can be indicated to a UE in a sidelink of an NR system.