Dynamic TDD User Equipment Fixed Uplink Resources
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Solution Overview
Problem
In radio communication systems with dynamic TDD, interference between adjacent cells occurs due to the flexible switching of uplink and downlink communication resources, affecting the accuracy of cell search, broadcast signal decoding, and RACH signal detection.
Innovation Solution
User equipment and base stations employ a scheme where connection request signals are transmitted in fixed uplink radio resources, and cell residing information signals are transmitted in fixed or muted downlink radio resources to minimize crosslink interference, ensuring accurate signal transmission and reception.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If dynamic TDD is used to flexibly control uplink and downlink resources, then traffic accommodation efficiency is improved, but crosslink interference between adjacent cells increases
Solution Approach 1:
The patent applies local quality by designating specific radio resources (first radio resources for downlink, second radio resources for uplink) with different transmission directions. This allows different parts of the resource spectrum to have different directional characteristics, reducing crosslink interference in specific locations while maintaining dynamic TDD flexibility for overall traffic accommodation.
Solution Approach 2:
The patent segments radio resources into distinct first radio resources and second radio resources with different transmission directions. By dividing the resource space and assigning different directional properties to different segments, the system achieves both flexible traffic accommodation and interference reduction through structured resource allocation.
2Adaptability or versatility
If dynamic TDD switching is performed at short time intervals, then traffic adaptability is improved, but signal detection accuracy deteriorates due to crosslink interference
Solution Approach 1:
By assigning different transmission directions to different radio resources, the patent creates local quality variations that protect critical signal detection processes from crosslink interference while maintaining dynamic switching capability for traffic adaptation.
3Reliability
If fixed uplink radio resources are used for connection request signals, then signal transmission reliability is improved, but resource flexibility is reduced
Solution Approach 1:
The patent segments radio resources into specific types: first radio resources for downlink communication, second radio resources for uplink communication including connection request signals, and third radio resources for other uplink signals. This segmentation provides dedicated reliable resources for connection requests while maintaining overall system flexibility through dynamic allocation of other resource types.
Data Source
AI summary
Disclosed is a scheme of transmitting various types of radio signals for which interference between adjacent cells is considered in a radio communication system (for example, dynamic TDD) in which uplink communication and downlink communication can be dynamically switched. A feature of the present invention relates to user equipment including a transceiver that performs transmission and reception of a radio signal with a base station in accordance with a communication scheme in which uplink communication and downlink communication are dynamically switched and a signal processor that processes the radio signal, wherein the transceiver transmits a connection request signal generated by the signal processor in fixed uplink radio resources of the communication scheme.