A Novel Hybrid CDMA/TDMA Protocol with a Reservation Request Slot for Wireless ATM Networks

Suwon LEE  Changhwan OH  Aftab AHMAD  Jeong-A LEE  Kiseon KIM  

IEICE TRANSACTIONS on Communications   Vol.E82-B    No.7    pp.1073-1076
Publication Date: 1999/07/25
Online ISSN: 
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Radio Communication
wireless ATM,  MAC protocol,  packet CDMA,  

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A hybrid CDMA/TDMA, a combination of CDMA and TDMA, is proposed as a MAC protocol for wireless ATM networks. TDMA offers the ability to integrate different types of services in a flexible way by the use of multiple slots per frame, while CDMA allows multiple users to transmit simultaneously using their own codes. To reduce the multiple access interference in each slot, the channel access is controlled by an access permission probability or a round robin method. A shared code scheme is adopted to utilize the given code resource efficiently. The results of simulation show that the proposed scheme gives better performance than the JCP algorithm.