Dynamic Gap Control for Random Access in Wireless Systems
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Solution Overview
Problem
The existing wireless communication systems lack a method to effectively activate and deactivate gaps during the random access procedure, which is crucial for efficient terminal operation in diverse scenarios.
Innovation Solution
A method and apparatus for a terminal to receive RRCReconfiguration from a base station, which includes gap setting information. The terminal initiates a random access procedure and enables or disables the gap based on the Type2GapStatus, affecting the transmission of Uplink-Shared Channels (UL-SCH).
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If gap is enabled during random access procedure, then terminal can perform measurement and power control operations, but UL-SCH transmission may be interrupted
Solution Approach 1:
The gap configuration is made dynamic by allowing activation and deactivation through MAC CE commands. The gap can be enabled or disabled based on terminal state and network requirements, rather than being statically configured. This resolves the contradiction by making the gap flexible - available when needed for measurements and power control, but可禁用 when UL-SCH transmission continuity is prioritized.
Solution Approach 2:
The gap status is controlled by changing the Type2GapStatus parameter value (0 or 1) via MAC CE commands. This parameter change mechanism allows the system to switch between gap-enabled and gap-disabled states, resolving the contradiction between needing gaps for reliable terminal operations and maintaining continuous UL-SCH transmission.
2Productivity
If gap is disabled during random access procedure, then UL-SCH transmission continues uninterrupted, but terminal cannot perform measurement and power control
Solution Approach 1:
The dynamic activation/deactivation mechanism allows the system to switch gap status based on current operational needs. When UL-SCH transmission continuity is critical, the gap can be disabled. When measurements or power control are needed, the gap can be enabled. This resolves the contradiction by providing flexibility to prioritize different functions as needed.
Solution Approach 2:
By changing the Type2GapStatus parameter through MAC CE commands, the system can disable the gap to ensure continuous UL-SCH transmission when productivity is prioritized, or enable it when reliability of terminal operations is more important. This parameter control mechanism resolves the contradiction between the two opposing requirements.
3Adaptability or versatility
If gap configuration is provided in RRCReconfiguration, then gap can be set for SpCell, but existing systems lack method to activate/deactivate gap during random access
Solution Approach 1:
The terminal itself can request gap activation/deactivation by sending MAC CE commands to the network. The terminal autonomously determines when gap functionality is needed based on its operational state and sends appropriate control messages. This resolves the contradiction by giving the terminal self-service capability to control gap configuration without requiring complex network-side management.
Solution Approach 2:
The MAC CE command mechanism provides feedback between terminal and network regarding gap status requirements. The terminal feedbacks its gap needs through MAC CE messages, and the network responds by activating or deactivating the gap configuration. This feedback loop resolves the contradiction by enabling practical control of gap functionality during random access procedures.
Data Source
AI summary
One embodiment of the present disclosure comprises: a step in which a terminal receives RRCReconfiguration from a base station, wherein the RRCReconfiguration includes one ServingCellConfig and one piece of gap configuration information for SpCell, wherein the ServingCellConfig includes n bwp-Id, n BWP-DownlinkCommon, and n+1 BWP-DownlinkDedicated and the gap configuration information includes gap length information, gap offset information, and gap period information, wherein the n+1 BWP-DownlinkDedicated optionally includes Type2GapStatus, and one BWP-DownlinkDedicated from among the n+1 BWP-DownlinkDedicated is associated with bwp-Id configuration information of an initial downlink BWP; and a step in which the terminal initiates a random access procedure and enabling or disabling the gap.