In this paper, we study the performance of the cumulative Automatic Repeat reQuest (ARQ) in IEEE 802.16 networks. An analytical model is developed to investigate some important performance metrics, such as protocol data unit (PDU) delivery delay, service data unit (SDU) delivery delay, and goodput. A general scheduling scheme and the flexible retransmission of lost PDUs are jointly considered i...

This paper presents the design and deployment of a locality-aware overlay multicast protocol called Anysee. The key idea of Anysee is to use the geometrical information of end hosts to construct the locality-aware overlay data delivery tree such that nearby users in the underlying network can be organized into nearby subtrees. The prototype of Anysee has been widely used in CERNET. Logging trac...

Research on bad news delivery reveals a reliable temporal delay in the onset of the bad news message from the sender to the receiver. An experiment utilized a false feedback test design to determine whether the delay is better accounted for by negative verbal message planning, functional communication potential, or both. Participant-senders (N = 138) delivered either scripted or unscripted good...

An important factor determining the performance of delay tolerant networks (DTNs) is packet delivery delay. In this paper, we study the block delivery delay of DTN with the epidemic routing scheme based on random linear network coding (RLNC). First, simulations show that the influence of relay buffer size on the delivery delay is not as strong in RLNC-based routing as it is in replica-based rou...

This paper explains trajectory⁃based data forwarding schemes for multihop data delivery in vehicular networks where the trajectory is the GPS navigation path for driving in a road network. Nowadays, GPS⁃based navigation is popular with drivers either for efficient driv⁃ ing in unfamiliar road networks or for a better route, even in familiar road networks with heavy traffic. In this paper, we de...

abstract background: as any delay in the onset of milk production and ejection in the first few days after delivery can cause breast-feeding failure, this study has been done to determine factors that may affect the onset time of lactation in vaginal and cesarean section deliveries with and without labor pain (elective). methods: 300 partujient mothers selected from two private and university h...

The delay/disruption tolerant network (DTN) has been researched actively in the last years because of its high applicability to ubiquitous network services such as sensor networks and intelligent transport system (ITS) networks. An efficient data forwarding method for those network services is one of the key components in DTN due to the limitation of wireless network resources. This paper propo...