Delay optimal concurrent transmissions in multi-radio access networks

Yu, Hong‐Wei; Hua, Cunqing; Li, Jie; Ni, Rui

doi:10.1109/icc.2015.7248883

Cited by 11 publications

(7 citation statements)

References 9 publications

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“…where λ i , E[B i ], ρ i = λ i G/μ i denote the arrival rate, the average holding cost, and the offered load of RAT i, respectively, all according to a state-independent batch-specific policy such as DOCT [13], OMMA [12]. The second term corresponds to the expected increase in cumulative costs that the later arriving batches experience with the given basic policy.…”

Section: B Packet Dispatching Policiesmentioning

confidence: 99%

“…However, the proportion of traffic λ i assigned to each RAT i can be optimized according to certain objectives. For example, the DOCT scheme in [13] proposes to minimize the maximum delay across multiple RATs, while the OMMA scheme in [12] attempts to minimize the average delay of all RATs. Then the packets are dispatched to each RAT with a probability proportional to its assigned ratio λ i .…”

Section: B Packet Dispatching Policiesmentioning

confidence: 99%

“…In [12], the authors propose the Opportunistic Multi-MAC Aggregation (OMMA) scheme to aggregate the transmission over multiple RATs. In [13], a convex optimization problem is formulated that attempts to reduce the out-of-order delay with optimal traffic splitting over multiple RATs. Some other research takes into account the state of each individual RATs in packet dispatching decision.…”

Section: Introductionmentioning

confidence: 99%

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Online Packet Dispatching for Concurrent Transmissions in Heterogeneous Multi-RAT Networks

Hua

2015

2015 IEEE Global Communications Conference (GLOBECOM)

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The heterogeneity of different radio access technologies (RATs) in the tightly integrated multi-RAT networks can be exploited to support bandwidth hungry applications. However, the out-of-order problem due to concurrent transmissions over multiple RATs may compromise the performance gain if packets are not well dispatched between different RATs. In this paper, we address this problem by adopting value function as a measure of the admittance cost based on current RAT and queuing states, with which the online packet dispatching problem is formulated as a nonlinear mix-integer programming problem. We obtain the close-form solution for this problem for the special case of two RATs and design a gradient algorithm based on the dual decomposition technique for general cases. Simulation results show that the proposed scheme significantly reduces the delay variation over different RATs, which is effective in alleviating the out-of-order problem in concurrent transmissions.

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Section: B Packet Dispatching Policiesmentioning

confidence: 99%

Section: B Packet Dispatching Policiesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Online Packet Dispatching for Concurrent Transmissions in Heterogeneous Multi-RAT Networks

Hua

2015

2015 IEEE Global Communications Conference (GLOBECOM)

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“…In order to address the above issues, a multiple radio access technology (multi-RAT) TCP traffic splitting strategy has been proposed for heterogeneous networks in [13], which solves the TCP out-of-order by ideally modelling the wireless transmissions in lower layers. [14] proposes a delay skew control algorithm in the packet splitting scenario, which achieves the purpose of controlling the delay bias of packets arriving at UE within a certain range through the design of linear cascade control technology.…”

Section: Introductionmentioning

confidence: 99%

High Throughput and Low Complexity Traffic Splitting Mechanism for 5G Non-Stand Alone Dual Connectivity Transmission

Sun

Zhang

et al. 2021

IEEE Access

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Dual connectivity (DC) is a key technology to improve the throughput of the fifth generation communication networks (5G) system. Due to the limitation of the splitting strategy and transmission delay of different transmission nodes, the out-of-order phenomenon of the packet data convergence protocol (PDCP) layer is bound to occur in the actual DC system. Packet out-of-order in PDCP layer will affect the end-to-end throughput of PDCP layer and there is no effective solution at present. Existing schemes either neglected to consider the transmission rate difference between New Radio (NR) Base Station (BS) and Long Term Evolution-Advanced (LTE-A) BS, or performed unified modeling for queuing dynamics, or did not consider the existence of Xn delay, thus failing to model the out-of-order problem of PDPC layer. In this paper, we modeling PDCP out-of-order into a hierarchical model and continuously reduce the maximum out-of-order depth through recursion. Two traffic splitting mechanisms are proposed based on user equipment (UE) feedback and BS observation. These two low complexity traffic splitting mechanisms both show efficient link resource utilization ratio of more than 90% in static and mobile user scenarios, and are superior to conventional algorithms.INDEX TERMS 5G, dual connectivity, throughput, out-of-order, traffic splitting, low complexity.

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“…They, however, do not consider user arrival and departure. Also, in [12], the authors consider the maximization of expected delays in different RATs as the optimization parameter. However, in our work, we deal with expected maximum delay as the system metric which captures the real life scenario better than that by [12].…”

Section: Introductionmentioning

confidence: 99%

Optimal traffic splitting policy in LTE-based heterogeneous network

Taksande

Roy

Karandikar

2018

2018 IEEE Wireless Communications and Networking Conference (WCNC)

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Dual Connectivity (DC) is a technique proposed to address the problem of increased handovers in heterogeneous networks. In DC, a foreground User Equipment (UE) with multiple transceivers has a possibility to connect to a Macro eNodeB (MeNB) and a Small cell eNodeB (SeNB) simultaneously. In downlink split bearer architecture of DC, a data radio bearer at MeNB gets divided into two; one part is forwarded to the SeNB through a non-ideal backhaul link to the UE, and the other part is forwarded by the MeNB. This may lead to an increase in the total delay at the UE since different packets corresponding to a single transmission may incur varying amounts of delays in the two different paths. Since the resources in the MeNB are shared by background legacy users and foreground users, DC may increase the blocking probability of background users. Moreover, single connectivity to the small cell may increase the blocking probability of foreground users. Therefore, we target to minimize the average delay of the system subject to a constraint on the blocking probability of background and foreground users. The optimal policy is computed and observed to contain a threshold structure. The variation of average system delay is studied for changes in different system parameters.

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Delay optimal concurrent transmissions in multi-radio access networks

Cited by 11 publications

References 9 publications

Online Packet Dispatching for Concurrent Transmissions in Heterogeneous Multi-RAT Networks

Online Packet Dispatching for Concurrent Transmissions in Heterogeneous Multi-RAT Networks

High Throughput and Low Complexity Traffic Splitting Mechanism for 5G Non-Stand Alone Dual Connectivity Transmission

Optimal traffic splitting policy in LTE-based heterogeneous network

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