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Unified Radio Resource Management for Hybrid Division Duplex System  

Kim, Pil-Geun (고려대학교 전파공학과 무선정보시스템공학 연구실)
Kang, Chang-Gu (고려대학교 전파공학과 무선정보시스템공학 연구실)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.31, no.11A, 2006 , pp. 1076-1084 More about this Journal
Abstract
In this paper, we first review a concept of hybrid division duplexing (HDD) scheme, which has been proposed as a new type of duplexing scheme useful for a next generation mobile communication system and its implementation issues, including the unified radio resource management for HDD scheme. The HDD scheme maintains the advantages of both TDD and FDD at the same time while providing a useful structure to control the inter-cell interference, caused by an asymmetric traffic load of multimedia services over uplink and downlink in the TDD scheme. Employing two frequency bands, one for TDD scheme and the other for FDD scheme, uplink is operating under the TDD scheme only, while downlink is operating under the TDD or FDD scheme, depending on the location of mobile station. In the HDD scheme, therefore, it must determine a type of duplexing scheme to employ in the downlink and futhermore, a ratio of uplink and downlink duration to meet a given traffic load of asymmetric service, which requires some unified radio resource management for handling the subsequent inter-cell interference. In this paper, we propose a distributed adaptive control approach as a means of unified radio resource management for a HDD system that maximizes the overall system efficiency by fully utilizing the resource in TDD band, while minimizing the inter-cell interference.
Keywords
Hybrid Division Duplex; Radio Resource Management;
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