Jaya Rao

Huawei Technologies · Department of R&D

Software defined networking (SDN) and network function virtualization (NFV) are key enablers for service-level customized network slicing in fifth generation (5G) core networks. Network slices are required to be isolated from each other in terms of service performance with traffic load fluctuations. In this article, the virtual network function (VN...

Network slicing is a key technology to allow resource sharing among heterogeneous operators/services, which achieves QoS isolation for service provisioning in future communication networks. In this article, a comprehensive hierarchical soft-slicing framework is proposed to enable software-defined radio access networks supporting differentiated serv...

The paradigm of network function virtualization (NFV) with the support of software defined networking (SDN) emerges as a promising approach for customizing network services in fifth generation (5G) networks. In this paper, a multicast service orchestration framework is presented, where joint traffic routing and virtual network function (NF) placeme...

Network slicing is a promising approach to provisioning service-level virtual network customization, based on the integration of SDN and NFV technologies. Although different network slices are logically independent, they are physically operated over a common infrastructure, resulting in challenges for QoS guarantee among slices in the presence of t...

The paradigm of network function virtualization (NFV) with the support of software defined networking (SDN) emerges as a promising approach for customizing network services in fifth generation (5G) networks. In this paper, a multicast service orchestration framework is presented, where joint traffic routing and virtual network function (NF) placeme...

Software defined networking (SDN) and network function virtualization (NFV) are key enabling technologies in fifth generation (5G) communication networks for embedding service-level customized network slices in a network infrastructure, based on statistical resource demands to satisfy long-term quality of service (QoS) requirements. However, traffi...

The integration of communications with different scales, diverse radio access technologies, and various network resources renders next-generation wireless networks (NGWNs) highly heterogeneous and dynamic. Emerging use cases and applications, such as machine to machine communications, autonomous driving, and factory automation, have stringent requi...

In this paper, a software-defined networking (SDN) based adaptive transmission protocol (SDATP) is proposed to support applications in fifth generation (5G) communication networks. For time-critical services, such as machine-type communication services for industrial automation, high reliability and low latency are required. To guarantee the strict...

In this article, a comprehensive approach is proposed for 5G communication networks. In SDATP, a slice-level customized protocol is developed for supporting time-critical services that require high reliability and low-latency, such as MTC services for industrial automation. To satisfy service quality requirements for an MTC service, we introduce in...

In this article, we propose a software-defined networking (SDN)-based transmission protocol (SDTP) for futuregeneration networks. Different services are supported by dedicated network slices, each of which can be operated separately with a customized transmission protocol. In particular, we focus on video streaming services supported by in-network...

Service-oriented virtual network deployment is based on statistical resource demands of different services, while data traffic from each service fluctuates over time. In this paper, a delay-aware flow migration problem for embedded services is studied to meet end-to-end (E2E) delay requirement with time-varying traffic. A non-convex multi-objective...

In this paper, a comprehensive software-defined networking (SDN) based transmission protocol (SDTP) is presented for fifth generation (5G) communication networks, where an SDN controller gathers network state information from the physical network to improve data transmission efficiency between end hosts, with in-path packet retransmission. In the S...

The software defined networking (SDN) enabled network function virtualization (NFV) architecture emerges as a cost-effective solution for service customization in fifth generation (5G) networks. In this paper, a joint traffic routing and virtual network function (VNF) placement problem is studied for a multicast service request accommodated over a...

In this paper, an analytical end-to-end (E2E) packet delay modeling is established for multiple traffic flows traversing an embedded virtual network function (VNF) chain in fifth generation (5G) communication networks. The dominant-resource generalized processing sharing (DR-GPS) is employed to allocate both computing and transmission resources amo...

URLLC use cases demand a new paradigm in cellular networks to contend with the extreme requirements with complex trade-offs. In general, it is exceptionally challenging and, resource usage-wise, prohibitively expensive to satisfy the URLLC requirements using the existing approaches in LTE. To address these challenges 3GPP has recently agreed to ado...

Future 5G wireless networks will face new challenges, including increasing demand on network capacity to support a large number of devices running applications requiring high data rates and always-on connectivity; immensely diverse service requirements and characteristics; and supporting the emerging business models in the wireless network market r...

Achieving high spectrum efficiency (SE) and energy efficiency (EE) is of primary importance for the sustainability of future cellular networks, but a key challenge is on balancing the tradeoff that arises when maximizing both of these performance metrics simultaneously. This paper develops a framework for analyzing the SE and EE of a two-Tier heter...

Machine to machine (M2M) traffic is characterized as low-rate, small-packet traffic with correlated transmissions. In this paper, we propose a two-phase traffic control mechanism (2PTC) for carrying M2M traffic in the future fifth generation (5G) networks. In this mechanism, the packets from each machine are directed to a virtual serving gateway as...

This paper addresses the problem of characterizing the quality of experience (QoE) of users accessing different types of applications in 802.11n wireless local area network (WLAN) deployment environments. Using the generalized logistic function with fractional powers, an analytically tractable QoE model that can be flexibly applied to different app...

This paper addresses the problem of balancing the tradeoff between spectrum efficiency (SE) and energy efficiency (EE) in heterogeneous cellular networks (HetNets). A framework is developed for analyzing the SE and EE of a 2-tier HetNet consisting of macro and femtocell base stations (BS) with shared spectrum operation. From the analysis it is show...

This paper surveys the recent findings in the area of energy efficient radio resource management in cellular networks. The primary objective is to identify and evaluate the key techniques that have the highest energy saving potential to be developed in the context of Green Networks while serving as a guideline for future research endeavours. The fo...

Offloading the users from capacity-strained macrocells in a cellular network to small cells is an effective strategy to support the increasing mobile data traffic, but a key challenge is how to simultaneously achieve high spectrum efficiency (SE) and energy efficiency (EE) in the heterogeneous radio access technology (RAT) environment. This paper d...

In this paper, a tractable analytical framework for investigating the energy efficiency (EE) of a 2-tier heterogeneous cellular network consisting of macro and picocell base stations (BS) is developed. The BSs, which are randomly distributed, serve a number of users in the downlink under shared spectrum operation. By incorporating a tunable downlin...

In this paper, the tradeoff relationship between the spectral efficiency (SE) and energy efficiency (EE) of homogenous cellular networks in which the BSs are arbitrarily distributed is investigated. The network performance metrics of SE and EE are assessed subject to a downlink transmission outage constraint in interference-limited operational envi...

In this paper, the energy efficiency (EE) of a 2-tier cellular network subject to downlink transmission outage probability constraints is analyzed under a shared spectrum scenario. The heterogeneous network considered consists of randomly distributed microcell BSs overlaid with picocell BSs. Based on the analysis of the structure of the EE function...

This paper analyzes the interrelationship between the spectral efficiency (SE) and energy efficiency (EE) of cellular networks where the base stations (BSs) are arbitrarily distributed. The SE and EE performance metrics are assessed subject to a downlink transmission outage constraint when operating in interference limited operational environments....

The objective of improving energy efficiency in Wireless Sensor Networks (WSNs) is a primary design requirement given the limited energy available in the battery powered sensor nodes. In this paper, a battery aware distributed clustering and routing protocol is proposed for the maximization of the network lifetime. The proposed protocol incorporate...

The focus of this paper is to analyze and assess the performance of various optimization techniques in the effort to determine the maximum lifetime of the nodes and the throughput in a Wireless Sensor Network (WSN) environment while being able to meet the network's application specific design requirements. We formulated the initial objective of the...