- タイトル
- Medium access protocol design for delay-guaranteed multicode CDMA multimedia networks
- 著者
- C.S.Chang, K.C.Chen
- 出典
- IEEE Trans. Wireless Commun.,
vol.2, no.6, pp.1159-1167,
2003/11.
- キーワード
- DS-CDMA, multi-code CDMA, multimedia, transmission delay, bit error rate
- 概要
- To enable multimedia real-time applications over next-generation wireless code-division multiple access (CDMA) packet-switching networks, previous efforts show a proper scheduling policy is the key to provide delay-guaranteed access services to various traffic types with different bit error rate (BE) requirements. Considering the support of the prevailing Internet protocol (IP) with variable-length packets in future mobile networks, we develop a mathematically delay-optimal medium access control (MAC) protocol over multicode CDMA (MC-CDMA) environments under the continuous-time assumption. From our investigations, we suggest that a good MAC protocol should be designed by using a proper single-server scheduling policy to guarantee packet-delay, and controlling the maximal number of simultaneous spreading-code transmissions to maintain the required BER. We further evaluate the performance of some MC-CDMA MAC protocols supporting QoS on BER and packet-delay, and show that MAC schemes conforming to our design rules give better performance on packet-delay when maintaining acceptable BER of various traffic types.
- 分類
- [SST]CDMAマルチメディア：マルチコード (No.4265)