On the packet allocation of multi-band aggregation wireless networks

Abstract

Abstract-The use of heterogeneous networks with multiple radio access technologies (RATs) is a system concept that both academia and industry are studying. In such system, integrated use of available multiple RATs is essential to achieve beyond additive throughput and connectivity gains using multi-dimensional diversity. This paper considers an aggregation module called opportunistic multi-MAC aggregation (OMMA). It resides between the IP layer and the air interface protocol stacks, common to all RATs in the device. We present a theoretical framework for such system while considering a special case of multi-RAT systems, i.e., a multi-band wireless LAN (WLAN) system. An optimal packet distribution approach is derived which minimizes the average packet latency (the sum of queueing delay and serving delay) over multiple bands. It supports multiple user terminals with different QoS classes simultaneously. We further propose a packet scheduling algorithm, OMMA Leaky Bucket, which minimizes the packet end-to-end delay, i.e., the sum of average packet latency and average packet reordering delay. We also describe the system architecture of the proposed OMMA system, which is applicable for the general case of the multi-RAT devices. It includes functional description, discovery and association processes, and dynamic RAT update management. We finally present simulation results for a multi-band WLAN system. It shows the performance gains of the proposed OMMA Leaky Bucket scheme in comparison to other existing packet scheduling mechanisms.

A Terminal-Oriented Distributed Traffic Flow Splitting Strategy for Multi-Service of V2X Networks

“…Some literature [25] has also presented a probability-split algorithm that minimizes delay in heterogeneous wireless networks. Some literature [26] proposes an optimal distribution scheme based on dynamic traffic allocation in heterogeneous wireless network environments. This scheme aims to minimize the queue delay while maximizing the probability of a packet arriving at a given delay constraint.…”

An Optimized Load Balance Solution for Multi-homed Host in Heterogeneous Wireless Networks

“…Load balance is an MH solution that aims at sending data over multiple connections in a fair distribution form, as either equal or unequal distributions [45]. Several techniques have been proposed to perform load balance of the application data, some of which have been focusing on distributing data traffic, others on multipath routing.…”

Traffic-Aware Resource Allocation with Aggregation in Heterogeneous Networks with WLANs

“…Wi-Fi link to multiple UEs, we consider the utility proportional fairness (PF) objective function formulation in (10).…”

“…Utilization of unlicensed bands is added in [8]. In [9] [10], traffic load balancing in multiple Radio Access Technologies (RATs) has been investigated with utility functions. While aforementioned works were conducted to support QoS of different traffic types or offload cellular traffic, to the best of our knowledge, the issue of how to efficiently utilize multiple bands from heterogeneous networks, including WLANs for heterogeneous traffic UEs capable of aggregation, has not been fully scrutinized.…”