A Study on MAC Protocol for Packet Data Services in Next-Generation Wireless Networks

차세대 무선망에서 패킷 데이터 서비스를 위한 MAC 프로토콜 연구

  • 임인택 (부산외국어대학교 컴퓨터공학부)
  • Published : 2004.10.01


In this paper, a CSSMA/AI MAC protocol for data services in packet CDMA network is presented. The main features of this protocol are the code status sensing and code reservation for reducing the packet collision. The base station broadcasts the code status on a frame-by-frame basis just before the beginning of each preamble transmission, and the mobile station transmits a preamble for reserving a randomly selected code based on the received code status. After having transmitted the preamble, the mobile station listens to the downlink of the selected code and waits for the base station reply. If this reply indicates that the code has been correctly acquired, it continues the packet transmission for the rest of the frame. If there are other packets waiting for transmission, the base station broadcasts the status of the code as reserved, and the mobile station transmits a packet on a reserved code for the successive frames.


  1. E. Sousa, and J. A. Silvester, 'Spreading code protocols for distributed spreadspectrum packet radio networks,' IEEE Trans. on Commun., vol.36, no.3, pp.272-280, Mar. 1988 https://doi.org/10.1109/26.1453
  2. O. Sallent, and R. Agusti, 'A proposal for an adaptive 5-ALOHA access system for a mobile CDMA environment,' IEEE Trans. on Veh. Tech., vol.47, no.3, pp.977-986, Aug. 1998 https://doi.org/10.1109/25.704852
  3. D. Raychaudhuri, 'Performance analysis of random access packet switched code division multiple access systems,' IEEE Trans. on Commun., vol.COM-29, no.6, pp.859-901, Jun. 1981
  4. In-Taek Lim, 'A Joint Packet Reservation and Status Sensing Multiple Access for Voice/Data Integrated CDMA Networks,' IEICE Trans. on Commun., vol.E84-B, no.4, pp.975-983, Apr. 2001
  5. S. Choi, and Kang G. Shin, 'A unified architecture of wireless networks for real-time and non-real-time communication services,' IEEE/ACM Trans. on Networking, vol.8, no.1, pp.44-59, Feb. 2000 https://doi.org/10.1109/90.836477
  6. In-Taek Lim, 'Centralized Transmission Probability Control Scheme for Fair Packet Data Services in CDMA 5-ALOHA System,' lEE Elec. Letters, vol.39, no.16, pp.1207-1209, Aug.2003 https://doi.org/10.1049/el:20030765
  7. 3GPP TS 25.321, V5.4.0, 'MAC Protocol Specification,' March 2003
  8. M. H. MacDougall, Simulating Computer Systems Techniques and Tools, MIT Press, 1987
  9. 임인택, '슬롯 CDMA 환경에서 패킷 데이터 서비스를 위한 MAC 프로토콜,' 한국해양정보통신학회 논문지, 제7권, 제7호, pp.1399-1405, 2003.12