Impact of Intra-LTE Handover with Forwarding on the User Connections

Bajzik, Lajos; Horváth, Péter; Korossy, L.; Vulkan, Csaba

doi:10.1109/istmwc.2007.4299274

Cited by 28 publications

(15 citation statements)

References 2 publications

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“…For uplink traffic, random access procedure is performed at the target BS. The results in [3] showed that the extra load caused by the forwarding is not significant. Also, the impact of forwarding on the end-user connections can be reduced by using a scheduling architecture at the transport layer that is able to differentiate among different service classes while allocating the bandwidth.…”

Section: Introductionmentioning

confidence: 94%

“…This relocation can be done in two different ways: 1) protocol status transfer from the source BS to the target BS; 2) protocol reinitialization after the handoff. In LTE networks, the relocation is done using a hybrid approach, where the downlink protocol status is transferred from the source BS to target BS [2], [3]. A packet forwarding approach from the old BS to the new BS has also been considered for the in-flight packets, whose impact on the user connection has been studied in [3].…”

Section: Introductionmentioning

confidence: 99%

“…In LTE networks, the relocation is done using a hybrid approach, where the downlink protocol status is transferred from the source BS to target BS [2], [3]. A packet forwarding approach from the old BS to the new BS has also been considered for the in-flight packets, whose impact on the user connection has been studied in [3]. For uplink traffic, random access procedure is performed at the target BS.…”

Section: Introductionmentioning

confidence: 99%

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Class-Based Shared Resource Allocation for Cell-Edge Users in OFDMA Networks

Singhal

Kumar²,

et al. 2014

IEEE Trans. on Mobile Comput.

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Abstract-In this paper, we present a new resource allocation scheme for cell-edge active users to achieve improved performance in terms of a higher system capacity and better quality-of-service (QoS) guarantee of the users, where we utilize the two-dimensional resource allocation flexibility of orthogonal frequency division multiple access (OFDMA) networks. Here, the mobile stations (MSs) at the cell-edge can maintain parallel connections with more than one base station (BS) when it is in their coverage area. A MS, before handoff to a new BS, seeks to utilize additional resources from the other BSs if the BS through which its current session is registered is not able to satisfy its requirements. The handoff procedure is termed as split handoff. The BSs participate in split handoff operation while guaranteeing that they are able to maintain QoS of the existing connections associated with them. In this study, first, we present the proposed shared resource allocation architecture and protocol functionalities in split handoff, and give a theoretical proof of concept of system capacity gain associated with the shared resource allocation approach. Then, we provide a differentiated QoS provisioning approach that accounts for the MS speed, its channel quality, as well as the loads at different BSs. Via extensive simulations in Qualnet, the benefits of the proposed class-based split handoff approach is demonstrated. The results also indicate traffic load balancing property of the proposed scheme in heavy traffic conditions.

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Section: Introductionmentioning

confidence: 94%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Class-Based Shared Resource Allocation for Cell-Edge Users in OFDMA Networks

Singhal

Kumar²,

et al. 2014

IEEE Trans. on Mobile Comput.

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“…Usage of combination of Uplink (UL) and DL path gain measurements for HO decision have been evaluated in [4] and it is found that it is not able to provide gain over downlink only based HO algorithm. Furthermore, in [5] the intra-MME/SAE Gateway HO with forwarding on the end user connections has been evaluated showing that the extra load caused by the forwarding is not significant.…”

Section: Introductionmentioning

confidence: 99%

Radio problem detection assisted rescue handover for LTE

Puttonen

Kurjenniemi

Alanen

2010

21st Annual IEEE International Symposium on Personal, Indoor and Mobile Radio Communications

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In this paper we propose a radio problem detection based rescue handover for 3G Long Term Evolution (LTE). The radio problem detection based handover algorithm takes advantage of already existing Radio Link Failure (RLF) detection mechanism specified in 3GPP for LTE. In coverage limited scenarios as well as challenging interference and mobility conditions, the event triggered handover measurement report may not be even sent to Evolved NodeB at the time of RLF. In proposed algorithm UE shall monitor the downlink quality based on the cell-specific reference signal in order to detect the downlink radio link quality of the serving cell. In case of a detected radio link problem handover process is initiated to a better cell. The proposed handover algorithm is compared to the default UE assisted hard handover process by means of fully dynamic system level simulations. Based on the studies it can be concluded that the radio problem detection assisted handover algorithm decreases the amount of RLFs thereby improving the handover and system performance. Especially the RLFs that occur before the handover process is even started are basically non-existent.

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“…In [10], an end-to-end solution to improve TCP during the handover has been proposed, but the drawback is that it requires modification of existing TCP protocols. The impact of LTE handover on user connection has been considered in [11], where some scheduler modifications to improve the user throughput are suggested. However, the core network status is not considered, where the network load plays a significant role on performance.…”

Section: Introductionmentioning

confidence: 99%

Improving TCP Performance During the Intra LTE Handover

Pacifico

Fischione

et al. 2009

GLOBECOM 2009 - 2009 IEEE Global Telecommunications Conference

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Abstract-Ensuring a seamless connection when users are moving across radio cells is essential to guarantee a high communication quality. In this paper, performance of TCP during the handover in a Long Term Evolution (LTE) network is investigated. Specifically, mobile users with high bit rates TCP services are considered, and the impacts of the intra LTE handover over their perceived throughput are studied. Due to the mobility of the users across radio cells, the high bandwidth required, and possible network congestions, it is shown that the handover may cause sudden degradation of the quality of the communication if the process is not correctly controlled. To alleviate these problems, three solutions are proposed: fast path switch, handover prediction, and active queue management. The first two solutions avoids excessive delay in the packet delivery during the handover, whereas the second solution acts at the transport network with an active queue management. Simulation results, obtained by an extension of the ns-2 simulator, show that the proposed solutions present advantages, and that the handover prediction used with the active queue management increases TCP performance significantly.

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Impact of Intra-LTE Handover with Forwarding on the User Connections

Cited by 28 publications

References 2 publications

Class-Based Shared Resource Allocation for Cell-Edge Users in OFDMA Networks

Class-Based Shared Resource Allocation for Cell-Edge Users in OFDMA Networks

Radio problem detection assisted rescue handover for LTE

Improving TCP Performance During the Intra LTE Handover

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