Wireless Terminal Uplink Control Resource Offset Mechanism
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Solution Overview
Problem
In wireless communication systems, particularly in scenarios where a wireless terminal communicates with different base stations for uplink (UL) and downlink (DL), conflicts in wireless resource scheduling can occur, leading to the inability of another base station to receive data from the terminal without errors, resulting in inefficient resource utilization and potential data resending.
Innovation Solution
The system configures a wireless communication system where the wireless terminal receives a downlink frame with control signals and transmits an uplink frame, with the uplink control resource element determined by shifting a second uplink control resource element based on the location of the downlink control resource element, using offset information included in the downlink control signal, to avoid resource conflicts and ensure accurate data reception.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a wireless terminal communicates with different base stations for UL and DL to improve UL communication quality, then UL communication quality is improved, but resource scheduling conflicts occur between base stations
Solution Approach 1:
The patent applies preliminary action by pre-configuring offset information in downlink control signals that indicates the relationship between downlink control resource elements and uplink control resource elements. This allows the wireless terminal to determine uplink resource elements in advance without real-time conflict detection, resolving the scheduling complexity issue while maintaining improved UL communication quality through differentiated base station communication.
2Productivity
If another base station receives uplink data from the wireless terminal, then system capacity is improved, but data reception errors occur due to resource conflicts
Solution Approach 1:
The patent implements feedback by providing offset information through downlink control signals that enables the wireless terminal to feedback uplink control signals at precisely determined resource elements. This feedback mechanism ensures that uplink data from different terminals to different base stations does not experience resource conflicts, maintaining both high system capacity and data reception accuracy.
3Adaptability or versatility
If wireless resources are allocated dynamically to support UL-DL communication with different base stations, then communication flexibility is improved, but resource scheduling conflicts increase
Solution Approach 1:
The patent applies parameter changes by introducing offset information as a controllable parameter in downlink control signals. This parameter defines the mapping relationship between downlink and uplink resource elements, allowing dynamic resource allocation while preventing conflicts. The offset parameter enables flexible communication with different base stations while maintaining orthogonal resource allocation to eliminate scheduling conflicts.
Data Source
AI summary
A wireless base station, includes: a wireless transceiver configured to transmit to a wireless terminal a downlink frame including a downlink control information, the wireless downlink control information includes information representing a specified offset, wherein the wireless transceiver is further configured to receive an uplink frame from the wireless terminal; and a processor circuit coupled to the wireless transceiver and configured to determine uplink control information from the uplink frame, the uplink control information being offset by at least the specified offset from a location in the uplink frame that is the same as a location where the downlink control information was located in the downlink frame.