User Equipment PDCCH Detection on Alternative Bandwidth Parts
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Solution Overview
Problem
In wireless communication systems, user equipment operating on unauthorized frequency bands face challenges with Discontinuous Reception (DRX) mechanisms, particularly when the Physical Downlink Control Channel (PDCCH) is not detectable due to occupied bandwidth parts, leading to disrupted data transmission.
Innovation Solution
The user equipment is configured to detect PDCCH on a first bandwidth part during a DRX cycle and, if not detected, switches to a second bandwidth part, while the network side device sends PDCCH to the user equipment using an idle second bandwidth part when the first is occupied, thereby ensuring continuous communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the user equipment detects PDCCH only on the first bandwidth part during DRX cycle, then the detection process is simple and power consumption is low, but the PDCCH may be missed when the first bandwidth part is occupied by other devices
Solution Approach 1:
The patent segments the bandwidth part into multiple detection opportunities - first attempting to detect PDCCH on the originally scheduled bandwidth part, and if unsuccessful, segmenting the detection process to include alternative bandwidth parts. This segmentation allows the system to maintain simple detection logic while improving reliability through multiple detection paths.
Solution Approach 2:
The patent applies preliminary action by pre-configuring alternative bandwidth parts for PDCCH detection before the DRX cycle begins. When the first bandwidth part is occupied, the user equipment can immediately switch to pre-identified alternative bandwidth parts without complex real-time decision-making, thus improving reliability while keeping the detection process relatively simple.
2Use of energy by moving object
If the user equipment enters sleep state when no PDCCH is detected on the first bandwidth part, then power consumption is reduced, but data transmission is disrupted when the first bandwidth part is occupied
Solution Approach 1:
The patent segments the sleep state decision process into multiple stages: first checking for PDCCH on the primary bandwidth part, then checking alternative bandwidth parts if the primary check fails. This segmentation allows the system to maintain low power consumption by entering sleep state in most cases, while improving transmission reliability by performing additional checks on alternative bandwidth parts when the primary channel is occupied.
Solution Approach 2:
The patent introduces alternative bandwidth parts as intermediary detection channels between the primary bandwidth part and the sleep state decision. When the primary bandwidth part is occupied, these intermediary channels provide an additional detection opportunity before the user equipment enters sleep state, thus maintaining both low power consumption and high transmission reliability.
3Reliability
If the network side device sends PDCCH only on the first bandwidth part, then the transmission process is simple, but the PDCCH cannot be delivered when the first bandwidth part is occupied
Solution Approach 1:
The patent segments the PDCCH transmission process into multiple bandwidth part options. The network side device first attempts to send PDCCH on the originally scheduled bandwidth part, and if that bandwidth part is occupied, segments the transmission process to include alternative bandwidth parts. This segmentation maintains simple transmission logic while improving delivery reliability through multiple transmission paths.
Solution Approach 2:
The patent applies dynamics by making the bandwidth part selection adaptive rather than fixed. The network side device dynamically selects which bandwidth part to use for PDCCH transmission based on real-time channel conditions and occupancy status. This dynamic approach allows the system to maintain simple transmission processes under normal conditions while improving reliability when channel conditions change.
Data Source
AI summary
The present invention relates to user equipment, an electronic device, a wireless communication method, and a storage medium. According to the present invention, the user equipment comprises a processing circuit, configured to: detect a physical downlink control channel (PDCCH) on a first bandwidth part of an unlicensed frequency band in a detection time of a discontinuous reception (DRX) period; and detect the PDCCH on a second bandwidth part of the unlicensed frequency band when the PDCCH is not detected on the first bandwidth part. By using the user equipment, the electronic device, the wireless communication method, and the storage medium in the present invention, a DRX mechanism of the user equipment operating on the unlicensed frequency band can be improved.