Wireless Control Channel Antenna Port Signaling
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Solution Overview
Problem
Current wireless communication systems face inefficiencies in transmitting and receiving downlink control information, particularly in multi-user multiple-input multiple-output (MU-MIMO) scenarios, where blind detection complexity is high and control channel capacity is limited.
Innovation Solution
A method and apparatus for efficiently receiving and transmitting downlink control information by signaling information about specific antenna ports to user equipment (UE), allowing for blind detection and assuming specific transmit diversity schemes, such as 2-antenna port beam cycling, to reduce complexity and improve capacity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If blind detection is performed for control channels in MU-MIMO scenarios, then control channel capacity is improved, but blind detection complexity increases
Solution Approach 1:
The patent segments the control channel reception process by dividing it into multiple blind detection stages. The UE first performs blind detection based on antenna port information, then proceeds to subsequent detection stages only for candidates that pass initial checks. This segmentation reduces the overall complexity by breaking down the exhaustive search into manageable portions with early termination capabilities.
Solution Approach 2:
The patent applies preliminary action by using antenna port information to pre-filter control channel candidates before performing full blind detection. The UE uses the signaled antenna port indices to narrow down the search space, performing preliminary checks that eliminate non-viable candidates early in the process, thereby reducing the computational burden of subsequent blind detection operations.
2Device complexity
If antenna port information is signaled to UE, then blind detection complexity is reduced, but signaling overhead increases
Solution Approach 1:
The patent applies local quality by providing antenna port information specifically tailored to each UE's configuration and capability. Rather than universal signaling, the antenna port indices are selectively signaled based on the UE's supported features, service requirements, and current radio conditions. This localized approach minimizes unnecessary signaling overhead while maintaining the complexity reduction benefit for each specific UE.
Solution Approach 2:
The patent utilizes parameter changes by dynamically adjusting the antenna port information signaling based on system conditions. The network can modify the antenna port indices, the number of ports signaled, and the granularity of port information according to traffic patterns, channel conditions, and UE capabilities. This adaptive parameter adjustment optimizes the balance between reducing blind detection complexity and minimizing signaling overhead in different operational scenarios.
Data Source
AI summary
A method according to an embodiment of the present invention, in which a terminal receives downlink control information from a base station in a wireless communication system comprises: a step of receiving information on an antenna port from the base station; a step of performing blind detection of a control channel on the basis of the information on the antenna port; and a step of obtaining downlink control information carried by the control channel through the blind detection, wherein it can be assumed that the information on the antenna port indicates the at least one antenna port to be monitored by the terminal among the plurality of antenna ports used by the base station for the control channel transmission, and the terminal while performing the blind detection applies a specific transmission diversity scheme to at least one antenna port indicated through the information on the antenna port. The terminal is capable of communicating with at least one of another terminal, a terminal related to an autonomous driving vehicle, the base station or a network.