Terminal Beam Management for D2D Initial Connection
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Solution Overview
Problem
In device to device direct communication, supporting new frequency bands with frequencies higher than conventional frequencies is challenging due to the lack of beam management functions, making it difficult to establish initial connections between terminals.
Innovation Solution
A terminal is equipped with a transmission unit that applies different beams to various signals, including synchronization signals and broadcast channels, and a control unit that establishes an RRC connection using received signals. In cases of overlap between signals in the time domain, the control unit prioritizes which signal to receive or transmit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If beam management function is added to support new frequency band in D2D communication, then connection establishment capability is improved, but device complexity increases
Solution Approach 1:
The patent applies preliminary action by having the terminal transmit synchronization signals and broadcast channels using multiple beams before actual data communication begins. This preliminary beam transmission enables the receiving terminal to identify and select appropriate beams for connection establishment, thereby improving connection establishment capability without requiring complex real-time beam adjustment mechanisms during data transmission.
Solution Approach 2:
The patent segments the signal transmission process into distinct components: synchronization signal transmission using multiple beams, broadcast channel transmission, and subsequent connection establishment based on received beam information. This segmentation allows the beam management function to be implemented in a modular manner, improving connection capability while controlling overall device complexity through structured implementation.
2Reliability
If multiple beams are applied to synchronization signals and broadcast channels, then signal reception reliability is improved, but time domain overlap conflicts increase
Solution Approach 1:
The patent implements feedback mechanisms where the receiving terminal measures signal quality for different beams and provides feedback information about which beams were successfully received. This feedback enables the transmitting terminal to adjust its beam selection for subsequent transmissions, improving signal reception reliability while managing time domain overlap conflicts through iterative optimization rather than complex real-time arbitration.
Solution Approach 2:
The patent performs beam transmission and signal reception in a preliminary phase before actual data communication begins. By completing the beam identification and selection process in advance through synchronization signal and broadcast channel transmissions, the system establishes clear temporal separation between beam management activities and data transmission, reducing time domain overlap conflicts without requiring complex ongoing prioritization logic.
Data Source
AI summary
A terminal includes: a transmission unit configured to perform transmissions to a first terminal by applying different beams to a plurality of first signals including a synchronization signal and a broadcast channel; a reception unit configured to receive a second signal corresponding to at least one of the plurality of first signals from the first terminal by using information related to a beam that is applied to the at least one of the first beams; and a control unit configured to establish an RRC (Radio Resource Control) connection with the first terminal by using the second signal. In a case where there is an overlap between the second signal and a third signal at least in a time domain, the control unit determines which of the second signal or the third signal is to be prioritized to be received or transmitted.