Millimeter Wave Control Channel Scheduling via Dual Antenna Patterns
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Solution Overview
Problem
The narrow beam patterns used in millimeter wave (mmW) systems pose challenges for standalone mmW base station solutions in delivering cell-specific and/or broadcast information.
Innovation Solution
A wireless transmit/receive unit (WTRU) receives a first control channel using a first antenna pattern and a second control channel using a second antenna pattern, determining beam scheduling information and whether it is scheduled for an mmW segment to form a receive beam and receive the second control channel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If narrow beam patterns are used in mmW systems, then user-specific data transmission capacity is improved, but delivery of cell-specific and broadcast information becomes challenging
Solution Approach 1:
The patent segments control information delivery into two distinct channels: a first control channel carried on a broad beam for cell-specific and broadcast information, and a second control channel carried on a narrow mmW beam for user-specific data transmission. This segmentation allows each channel to use the appropriate beam width for its specific function, resolving the contradiction between broad coverage needs and high-capacity narrow beam transmission.
2Ease of operation
If a broad beam is used to carry the first control channel, then cell-specific and broadcast information delivery is improved, but user-specific data transmission capacity is reduced
Solution Approach 1:
The patent divides control channel functionality into two separate channels with different beam characteristics. The first control channel uses a broad beam pattern optimized for wide coverage of cell-specific information, while the second control channel uses a narrow mmW beam pattern optimized for high-capacity user-specific data transmission. This functional segmentation eliminates the trade-off by allowing each channel to operate at its optimal performance point.
3Productivity
If multiple control channels are received using different antenna patterns, then beam scheduling efficiency is improved, but device complexity increases
Solution Approach 1:
The patent applies preliminary action by having the network pre-configure the first control channel on a broad beam before user-specific data transmission begins. This allows the WTRU to efficiently receive cell-specific information and beam scheduling directives in advance, simplifying subsequent data reception operations and reducing real-time processing complexity despite the multi-channel architecture.
Data Source
AI summary
A wireless transmit/receive unit (WTRU) (e.g., a millimeter WTRU (mWTRU)) may receive a first control channel using a first antenna pattern. The WTRU may receive a second control channel using a second antenna pattern. The WTRU may demodulate and decode the first control channel. The WTRU may demodulate and decode the second control channel. The WTRU may determine, using at least one of: the decoded first control channel or the second control channel, beam scheduling information associated with the WTRU and whether the WTRU is scheduled for an mmW segment. The WTRU may form a receive beam using the determined beam scheduling information. The WTRU receive the second control channel using the receive beam. The WTRU determine, by demodulating and decoding the second control channel, dynamic per-TTI scheduling information related to a data channel associated with the second control channel.