Terminals, wireless communication methods, base stations and systems

By treating multiple carriers as a single serving cell with cross-division duplex, the method addresses inefficiencies in existing wireless communication systems, enhancing frequency utilization and throughput by dynamically allocating DL and UL resources.

JP2026113562APending Publication Date: 2026-07-07NTT DOCOMO INC
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Patent Information

Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
NTT DOCOMO INC
Filing Date
2026-04-01
Publication Date
2026-07-07

AI Technical Summary

Technical Problem

Existing wireless communication systems face inefficiencies in resource utilization, leading to decreased communication throughput due to constraints in treating multiple frequency carriers as a single virtual cell, particularly in TDD configurations where UL and DL resources are imbalanced, causing UL transmission delays and congestion.

Method used

A terminal and wireless communication method that enables efficient use of multiple carriers by treating them as a single serving cell, allowing simultaneous DL and UL operations through cross-division duplex (XDD) and elastic cell configurations, where DL and UL resources are dynamically allocated across carriers.

Benefits of technology

This approach enhances frequency utilization efficiency by optimizing resource allocation, reducing overhead, and improving communication throughput by allowing simultaneous transmission and reception across multiple carriers.

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Abstract

The present invention provides terminals, wireless communication methods, base stations, and systems that efficiently utilize or support multiple different carriers during initial access. [Solution] A terminal according to one aspect of the present disclosure includes a control unit that uses multiple carriers for initial access, and a receiving unit that receives at least one of a synchronization signal and a broadcast channel on at least one of the multiple carriers. The terminal can improve frequency utilization efficiency by using multiple carriers that do not include a SUL (supplementary uplink) and, for example, one pair of FDD carriers (paired spectrum) for initial access.
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