Uplink Synchronization Allocation in Base Station Devices
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Solution Overview
Problem
The existing methods for resuming downlink data transmission in mobile communication systems face inefficiencies in radio resource utilization due to frequent allocation of uplink synchronization requests using the PDCCH, which are not often utilized.
Innovation Solution
Allocating uplink synchronization requests to a region within the radio frame where communication parameters are set, allowing for efficient use of radio resources by distinguishing between synchronization maintenance and re-synchronization requests.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If uplink synchronization requests are frequently allocated using PDCCH, then uplink synchronization can be maintained, but radio resource utilization efficiency deteriorates
Solution Approach 1:
The patent segments the radio frame into multiple regions with different functions. Specifically, it divides the control region into parts for synchronization maintenance requests and parts for synchronization re-establishment requests. This segmentation allows the system to allocate resources more efficiently by matching the type of synchronization request with the appropriate region, thereby avoiding unnecessary PDCCH allocations and improving radio resource utilization while maintaining uplink synchronization reliability.
2Loss of energy
If uplink synchronization requests are allocated in dedicated regions, then radio resource utilization improves, but device complexity increases
Solution Approach 1:
The patent implements preliminary action by pre-configuring multiple distinct regions in the radio frame before synchronization requests occur. Each region is pre-designated for specific purposes (e.g., synchronization maintenance vs. re-establishment). When synchronization requests arise, the base station and mobile station simply match the request type with the corresponding pre-configured region, eliminating the need for complex real-time allocation decisions and reducing device complexity while improving radio resource utilization efficiency.
Data Source
AI summary
A mobile station device that receives control information having a downlink control information format and addressed by a Cell-Radio Network Temporary Identifier on a physical downlink control channel from a base station device. The mobile station device also transmits a random access preamble using a random access channel to the base station device based on receiving the control information which provides a random access order. The downlink control information format includes a first field for downlink resource assignment. In a first case that the downlink control information form at is used for the random access order, a fixed value is set to the first field, while in a second case in which the downlink control information format is used for downlink scheduling, a first value different from the fixed value is set to the first field.