Abstract:Abstract-Data traffic is expected to grow faster than capacity in future wireless networks. Therefore it will become unavoidable to deal with congestion. Bottlenecks are located on the wireless links because back-haul and Internet are overprovisioned. Traffic routed towards the user terminal (UT) in down-link direction keeps coming in through a big pipe until it reaches the base station (BS). The following wireless links can only carry a limited data rate due to congestion. In a multi-hop situation buffers bef… Show more
“…III and implemented at RNs. As mentioned in [8], DeNB only implements the TFCS since DeNB doesn't have the handover forwarding problem. The detailed simulation setting for all flow control schemes were configured as in Table II.…”
Section: Simulation Resultsmentioning
confidence: 99%
“…In [7], the credit-based flow control scheme was adopted to alleviate the buffer-overflow problem in multihop cellular network. In [8], the authors further indicated that the bufferoverflow problem does not merely occur at RN. This problem also emerges at DeNB due to the high-speed wired backhaul.…”
Relaying technology is a cost-effective solution for achieving throughput enhancement for cell-edge users or extending the cell coverage for the 3GPP LTE-A systems. In this study, we investigate the flow control scheme in the LTE-A relay networks employing the Type-I relay nodes (RNs). However, the buffer-overflow problem [7, 8] caused by high-speed arrival traffic and the handover forwarding problem caused by UE's handover are two main issues that affect the performance of 3GPP LTE-A relay networks. To mitigate these problems, we present a dynamic two-threshold flow control scheme (DTFCS) which can dynamically adjust the upper buffer-threshold of RN based on the channel quality. Results showed that DTFCS can reduce 40% of the total number of forwarding packets during the handover when compared with the two-threshold flow control scheme. Additionally, when the proposed scheme is compared to single-threshold flow control scheme, DTFCS excels by imposing much less signaling overhead on the expense of a slight increase in the number of forwarding packets.
Keywords-dynamic two-threshold flow control scheme (DTFCS); handover; type-I relay node (RN)I.
“…III and implemented at RNs. As mentioned in [8], DeNB only implements the TFCS since DeNB doesn't have the handover forwarding problem. The detailed simulation setting for all flow control schemes were configured as in Table II.…”
Section: Simulation Resultsmentioning
confidence: 99%
“…In [7], the credit-based flow control scheme was adopted to alleviate the buffer-overflow problem in multihop cellular network. In [8], the authors further indicated that the bufferoverflow problem does not merely occur at RN. This problem also emerges at DeNB due to the high-speed wired backhaul.…”
Relaying technology is a cost-effective solution for achieving throughput enhancement for cell-edge users or extending the cell coverage for the 3GPP LTE-A systems. In this study, we investigate the flow control scheme in the LTE-A relay networks employing the Type-I relay nodes (RNs). However, the buffer-overflow problem [7, 8] caused by high-speed arrival traffic and the handover forwarding problem caused by UE's handover are two main issues that affect the performance of 3GPP LTE-A relay networks. To mitigate these problems, we present a dynamic two-threshold flow control scheme (DTFCS) which can dynamically adjust the upper buffer-threshold of RN based on the channel quality. Results showed that DTFCS can reduce 40% of the total number of forwarding packets during the handover when compared with the two-threshold flow control scheme. Additionally, when the proposed scheme is compared to single-threshold flow control scheme, DTFCS excels by imposing much less signaling overhead on the expense of a slight increase in the number of forwarding packets.
Keywords-dynamic two-threshold flow control scheme (DTFCS); handover; type-I relay node (RN)I.
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