• Journal of Korea Society of Digital Industry and Information Management
• /
• v.7 no.2
• /
• pp.47-58
• /
• 2011

Snoop was suitably designed for wired and wireless network as having snoop agent module in BS(Base Station) which is connecting to both wired and wireless network in order to supplement the problems of TCP. This study examined performance difference by using the web traffic taken wide possession in current internet traffic. The web traffic has greater amount of traffic, shorter life time, and smaller size than other traffics. This study found that snoop producing performance improvement of wireless network in the network mixed with the wired and wireless lead performance loss when transmitting web traffic. This study found that in case of web traffic is transmitted it bring a performance improvement of web traffic as computing BWE((Bandwidth Expansion), and also found that this study prove of performance improvement by decreasing local retranmission.

• Journal of the Institute of Electronics Engineers of Korea TC
• /
• v.46 no.8
• /
• pp.50-58
• /
• 2009

Fourth generation mobile communication network have the technology of extensive form include basic service technology and it has been developed from the radio access technology and network topology. Not only fourth generation mobile communication network have basically done new highspeed radio access technology which is suitable to high and low speed environment of transfer, but also it is possible that they have been made for freely vertical handover. ETRI also has made fourth generation mobile communication network which is WiNGS(Wireless Initiative for Next Generation Service) satisfied that demand. This paper is made by lossless handover method through the local retransmission ARQ agent that is one of the main technology of fourth generation mobile communication network. Lossless handover method through local retransmission ARQ agent has been basically made by WiNGS and it was better than original local retransmission of layer by simulation.

• The Journal of Korean Institute of Communications and Information Sciences
• /
• v.22 no.11
• /
• pp.2563-2571
• /
• 1997

This paper presents a new CLSP/CC (Channel Load Sensing Protocol/Channel Clearance) in order to obtain better performance in spread slotted ALOHA networks. This proposed protocol can decrease a wasteful using of channel by prohibiting continuous transmissionof packets destroyed in previous slot, with little added system complexities. The performances of the proposed CLSP/CC, which include network throughput, average processing tiem and the number of mobile stations in retranmission state, are obtained and compared with those of existing CLSP by simulations in this paepr. As the resutls of simulations, the proposed CLSP/CC gets higher throughput and less average processing time, especially in the highly offered load. And CLSP/CC can obtain maximum network throughput at larger offered load than existing CLSP, so it enable to accommodate more mobile station or highly offered loads in slotted spread ALOHA networks.