Communication Device Same Center Frequency Sidelink Downlink
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Solution Overview
Problem
In communication systems, the efficiency of sidelink (SL) and downlink (DL)/uplink (UL) communications is compromised when different bandwidth parts or numerologies are applied between SL and DL/UL, leading to increased guard periods and reduced transmission/reception symbols.
Innovation Solution
Configuring the same bandwidth part or numerology for both DL/SL receptions and UL/SL transmissions within the same slot, allowing for identical center frequencies and bandwidths to be used for both, thereby minimizing the guard period required for switching.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If different bandwidth parts or numerologies are applied between SL and DL/UL, then adaptability is improved, but communication efficiency deteriorates due to increased guard periods and reduced transmission symbols
Solution Approach 1:
The patent applies local quality by configuring bandwidth parts and numerologies differently for different communication links (SL vs DL/UL) based on their specific requirements. The base station can independently optimize bandwidth part settings for sidelink communication while maintaining appropriate settings for downlink/uplink, allowing each link to have the quality characteristics best suited to its function rather than forcing a uniform configuration across all links.
Solution Approach 2:
The patent implements dynamics by enabling flexible and dynamic configuration of bandwidth parts and numerologies for SL and DL/UL communications. The base station can adaptively adjust these parameters based on traffic conditions, channel states, and service requirements, allowing the system to transition between different configuration states optimally rather than being locked into a static configuration.
2Adaptability or versatility
If different bandwidth parts or numerologies are applied between SL and DL/UL, then versatility is improved, but loss of time increases due to longer guard periods required for switching
Solution Approach 1:
The patent applies preliminary action by pre-configuring multiple bandwidth parts and numerology settings in advance for both SL and DL/UL communications. The base station prepares alternative configurations ahead of time, allowing rapid switching between them without requiring lengthy transition periods. This pre-positioning of configuration options enables the system to maintain versatility while minimizing the time lost during parameter transitions.
3Adaptability or versatility
If different bandwidth parts or numerologies are applied between SL and DL/UL, then adaptability is improved, but the number of transmission/reception symbols decreases
Solution Approach 1:
The patent implements parameter changes by systematically varying bandwidth part configurations and numerology parameters (such as subcarrier spacing, cyclic prefix length, and resource block allocation) for SL and DL/UL communications. By optimizing these parameters independently for each link type, the system achieves greater adaptability while maintaining sufficient symbol durations for reliable transmission and reception, rather than being constrained by a single set of parameters that must satisfy all communication types.
Data Source
Figure 1~2A
Figure 2B
Figure 3
AI summary
A communication device includes a receiving unit that receives at least one of configuration information of a same center frequency used for downlink reception and sidelink reception in one slot or configuration information of a same center frequency used for uplink transmission and sidelink transmission in the one slot; and a control unit that configures, based on the received configuration information, at least one of the same center frequency for the downlink reception and the sidelink reception in the one slot or the same center frequency for the uplink transmission and the sidelink transmission in the one slot.