TY - JOUR
T1 - Uncoordinated real-time video transmission in wireless multicode CDMA systems
T2 - An SMPT-based approach
AU - Fitzek, Frank
AU - Reisslein, Martin
AU - Wolisz, Adam
N1 - Funding Information:
Supported in part by the National Science Foundation through grant Career ANI–0133252, the State of Arizona through the IT301 initiative, and the BMBF (German Science Ministry) through the TransiNet project.
PY - 2002/10
Y1 - 2002/10
N2 - We consider the real-time transmission of encoded video from distributed, uncoordinated wireless terminals to a central base station in a multi-code CDMA system. Our approach is to employ the recently proposed simultaneous MAC packet transmission (SMPT) approach at the data link layer (in conjunction with UDP at the transport layer). We consider the real-time transmission of both video encoded in an open loop (i.e., without rate control) and video encoded in a closed loop (i.e., with rate control). We conduct extensive simulations and study quantitatively the trade-off between video quality, transmission delay (and jitter), and number of supported video streams (capacity). We find that the simple-to-deploy SMPT approach achieves significantly higher video quality and smaller delays than the conventional sequential transmission approach, while ensuring high capacity. In typical scenarios, with SMPT the probability of in-time video frame delivery is more than twice as large as with sequential transmission (for given delay bounds). Our results provide guidelines for the design and dimensioning of cellular wireless systems as well as ad hoc wireless systems.
AB - We consider the real-time transmission of encoded video from distributed, uncoordinated wireless terminals to a central base station in a multi-code CDMA system. Our approach is to employ the recently proposed simultaneous MAC packet transmission (SMPT) approach at the data link layer (in conjunction with UDP at the transport layer). We consider the real-time transmission of both video encoded in an open loop (i.e., without rate control) and video encoded in a closed loop (i.e., with rate control). We conduct extensive simulations and study quantitatively the trade-off between video quality, transmission delay (and jitter), and number of supported video streams (capacity). We find that the simple-to-deploy SMPT approach achieves significantly higher video quality and smaller delays than the conventional sequential transmission approach, while ensuring high capacity. In typical scenarios, with SMPT the probability of in-time video frame delivery is more than twice as large as with sequential transmission (for given delay bounds). Our results provide guidelines for the design and dimensioning of cellular wireless systems as well as ad hoc wireless systems.
UR - http://www.scopus.com/inward/record.url?scp=0036817995&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0036817995&partnerID=8YFLogxK
U2 - 10.1109/MWC.2002.1043860
DO - 10.1109/MWC.2002.1043860
M3 - Review article
AN - SCOPUS:0036817995
SN - 1536-1284
VL - 9
SP - 100
EP - 110
JO - IEEE Wireless Communications
JF - IEEE Wireless Communications
IS - 5
ER -