All-IP 4G Network architecture for efficient mobility and resource management

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Choi, Young-June; Lee, Kwang Bok; Bahk, Saewoong
Issue Date
Institute of Electrical and Electronics Engineers (IEEE)
IEEE Wireless Communications, vol. 14, no. 2, Apr. 2007, pp. 42-6
In this article, we investigate 4G network
architecture and consider two underlying layers:
PHY and MAC. We compare two models of
wireless access network: pure all-IP and subnet
based networks. The pure all-IP model is simple
and cost-efficient but causes implementation
issues of mobility management and resource
coordination. In contrast, the subnet-based network
enables layer 2 and layer 3 handoffs to be
executed independently, deploying several access
points under an access router. Further, to handle
various cases efficiently according to traffic class
and mobility, we present an advanced model of a
hierarchical cellular system that combines multiple
access techniques of OFDMA and FHOFDMA
with microcells and macrocells. Finally,
as an integrated approach to support diverse
QoS requirements, we consider an IP-triggered
resource allocation strategy (ITRAS) that
exploits IntServ and DiffServ of the network
layer to interwork with channel allocation and
multiple access of MAC and PHY layers, respectively.
These cross layer approaches shed light
on designing a QoS support model in a 4G network
that cannot be handled properly by a single
layer based approach.
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College of Engineering/Engineering Practice School (공과대학/대학원)Dept. of Electrical and Computer Engineering (전기·정보공학부)Journal Papers (저널논문_전기·정보공학부)
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