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Design of MAC Chip for AWG-based WDM-PON-II: MAC Protocol  

Han, Kyeong-Eun (전북대학교 영상정보신기술연구센터)
Yang, Won-Hyuk (전북대학교 컴퓨터공학과)
Kim, Young-Chon (전북대학교 영상정보신기술연구센터)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.33, no.8B, 2008 , pp. 646-656 More about this Journal
Abstract
In this paper, we design and verify the MAC chip of the two-stage AWG-based WDM-PON which considers 128 ONUs and 32 wavelengths. Each wavelength with the capacity of 1Gbps is allocated to ONU for downstream transmission but each wavelength for upstream transmission can be shared by four ONUs. Therefore, MAC protocol is required to avoid the collision and use the network resource efficiently among ONUs which are sharing the same wavelength. To design a request/permit-based MAC protocol, we define a unit-chip module called sub-MAC. The WDM-PON with 128 ONUs can be implemented by using 32 sub-MAC modules. The sub-MAC consists of one control unit, one receipt unit and four transmission units. The state transition diagram of the module is described by the internal/external control signals among the functional units. The function of the sub-MAC module is verified through logic simulation using ModelSIM.
Keywords
WDM; PON; AWG; MAC;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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