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The bandwidth in wireless networks is usually shared by a number of wireless nodes. The channel capacity depends on the number of accessing nodes, time, environmental conditions and location of nodes. Due to varying channel conditions, several issues are observed in the transmission of real time multimedia. The existing research on multimedia streaming can be classified into adaptation techniques...
The IEEE 802.16j WiMAX is designed to provide a broadband multi-hop wireless access. However traffic transmission in such networks faces the challenges of user demand differentiation, link congestion and network status variation. To tackle those issues we construct effective schedulers implemented at each RS to achieve the desired end to end flow control and congestion control over the whole network...
In wireless transmission, hybrid automatic repeat request (HARQ) can improve the throughput performance by using error correction and error detection techniques when the signal quality is poor. In this paper, the effectiveness of HARQ in orthogonal frequency division multiple access (OFDMA) based wireless networks is studied. In OFDMA networks, every channel is split into a set of orthogonal sub-carriers...
In this paper, we propose an adaptive pacing scheme at the link layer for IEEE 802.11 based multihop wireless networks. Our objective is to improve the performance of higher layer protocols without any modifications to them. Our adaptive pacing scheme estimates the four-hop transmission delay in the network path without incurring any additional overheads, and accordingly paces the packets to reduce...
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