Two-Level Dedicated Channel Scheduling for PDCCH Flexibility
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Solution Overview
Problem
The existing Physical Downlink Control Channel (PDCCH) and Enhanced Physical Downlink Control Channel (EPDCCH) systems face limitations in interference coordination and channel capacity, affecting scheduling timeliness and flexibility due to complex design constraints.
Innovation Solution
A method involving two levels of dedicated channels with distinct time-frequency resources, where a network device allocates and manages level-one and level-two dedicated channels to improve scheduling information transmission flexibility, allowing for independent resource allocation based on service delay requirements and using common channels for system messages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If PDCCH and EPDCCH coexist with time division multiplexing, then channel capacity is improved, but scheduling flexibility and timeliness are reduced due to complex design constraints
Solution Approach 1:
The patent segments the control channel into two levels: level-one dedicated channel for transmitting indication information and level-two dedicated channel for transmitting scheduling information. This segmentation allows independent resource allocation for different types of control information, resolving the contradiction between channel capacity and scheduling flexibility.
Solution Approach 2:
The patent introduces a hierarchical dimension to the control channel structure, transitioning from a flat single-level structure to a two-level hierarchical structure. This dimensional change enables more flexible resource allocation and improves scheduling timeliness while maintaining channel capacity.
2Reliability
If EPDCCH start symbol is limited by PDCCH, then interference coordination is improved, but transmission scheduling timeliness is reduced
Solution Approach 1:
By segmenting the control channel into level-one and level-two dedicated channels with independent time-frequency resources, the patent eliminates the constraint where EPDCCH start symbol is limited by PDCCH. Each level can be allocated independently, enabling timely scheduling while maintaining interference coordination through proper resource management.
3Reliability
If complex design constraints are applied to PDCCH and EPDCCH coexistence, then interference coordination is improved, but device complexity increases
Solution Approach 1:
The patent simplifies the design by segmenting the control channel into two distinct levels with clear functional division. Level-one dedicated channel handles indication information while level-two dedicated channel handles scheduling information, reducing the complexity of coordinating between PDCCH and EPDCCH while maintaining interference coordination capabilities.
Data Source
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AI summary
The present invention provides a scheduling information transmission method and apparatus. The method includes: allocating, by a network device, a level-one dedicated channel and a level-two dedicated channel to a target terminal device; sending, by the network device, indication information of the level-one dedicated channel by using a preset first time-frequency resource; sending, by the network device, indication information of the level-two dedicated channel to the target terminal device by using the level-one dedicated channel; and sending, by the network device, dedicated scheduling information for the target terminal device to the target terminal device by using the level-two dedicated channel. Therefore, scheduling information transmission flexibility can be improved, and system performance and user experience can be improved.