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UBC Theses and Dissertations
Connection architecture and protocols to support user terminal mobiltity over an ATM/B-ISDN personal communications network Yu, Oliver T.W.
Abstract
Future personal communications networks (PCNs) will support personal and terminal mobility based on the B-ISDN platform, and will likely employ ATM-based backbone networks to interconnect wireless mobile networks. This thesis addresses the problem of providing robust, fast and seamless network-wide handoffs over an ATM-based PCN to support non-restrictive terminal mobility and to maintain connection-oriented performances during calls in order to enable handoff transparency to users. A novel "mobile virtual circuit (MVC) connection architecture" is proposed in the ATM layer to facilitate fast handoffs and to allow mobile and non-mobile traffic to share connection resources. The proposed MVC maintains the current and the potential handoff connections terminated at the neighbouring base stations as a dynamic connection tree, which converges at a root node in the ATM-based backbone to enable connection reuse during handoff. To minimize resource overhead and to enable fast handoff, the proposed MVC predetermines routes for potential handoff connections during call setup and after each successive handoff, and employs the proposed robust and fast scheme of generic bandwidth reservation along the predetermined route to complete the establishment during handoff. A novel "general real-time connection rerouting service" in ATM/B-ISDN is proposed with capabilities that can be configured to support robust, fast and seamless call rerouting over fixed connections in general and to support call handoffs over ATM-based PCN in particular. This service includes: (1) a novel packet ordering synchronization transaction protocol (POSTP) to prevent call disruptions due to transient data loss and sequencing errors during the traffic rerouting phase; (2) a novel robust and fast resource reservation transaction protocol (RFRTP) to enable fast connection establishment over a predetermined route with optional localized rerouting over congested or failed links. To support general real-time connection control services (e.g., the proposed rerouting service), extensions to the SS7-based signaling network are proposed with source-routing associated-CCS and inband signaling to provide fast distributed signaling transport and synchronization data transport respectively. To facilitate robust handoffs or to maintain the probability of forced call termination due to handoff blocking under non-stationary call arrival condition, a novel "dynamic guard channel resource management architecture" is proposed to adapt the number of guard channels in each cell according to the current estimate of the handoff arrival rate derived from the current number of ongoing calls in neighbouring cells and the mobility pattern, so as to keep the handoff blocking probability close to the targeted objective while constraining the new call blocking probability to be below a given level. The proposed scheme is applicable to channel allocation over cellular mobile networks, and is extended to bandwidth allocation over the backbone network. It is demonstrated that fast, robust and seamless network-wide handoffs over an ATM-based PCN can be achieved by integrating the proposed service and architectures. Handoff performance is analyzed in terms of handoff processing delay and forced call termination probability.
Item Metadata
Title |
Connection architecture and protocols to support user terminal mobiltity over an ATM/B-ISDN personal communications network
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Creator | |
Publisher |
University of British Columbia
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Date Issued |
1997
|
Description |
Future personal communications networks (PCNs) will support personal and terminal
mobility based on the B-ISDN platform, and will likely employ ATM-based backbone
networks to interconnect wireless mobile networks. This thesis addresses the problem
of providing robust, fast and seamless network-wide handoffs over an ATM-based PCN
to support non-restrictive terminal mobility and to maintain connection-oriented performances
during calls in order to enable handoff transparency to users. A novel "mobile
virtual circuit (MVC) connection architecture" is proposed in the ATM layer to facilitate
fast handoffs and to allow mobile and non-mobile traffic to share connection resources.
The proposed MVC maintains the current and the potential handoff connections terminated
at the neighbouring base stations as a dynamic connection tree, which converges at
a root node in the ATM-based backbone to enable connection reuse during handoff. To
minimize resource overhead and to enable fast handoff, the proposed MVC predetermines
routes for potential handoff connections during call setup and after each successive handoff,
and employs the proposed robust and fast scheme of generic bandwidth reservation
along the predetermined route to complete the establishment during handoff.
A novel "general real-time connection rerouting service" in ATM/B-ISDN is proposed
with capabilities that can be configured to support robust, fast and seamless call
rerouting over fixed connections in general and to support call handoffs over ATM-based
PCN in particular. This service includes: (1) a novel packet ordering synchronization
transaction protocol (POSTP) to prevent call disruptions due to transient data loss and
sequencing errors during the traffic rerouting phase; (2) a novel robust and fast resource
reservation transaction protocol (RFRTP) to enable fast connection establishment over
a predetermined route with optional localized rerouting over congested or failed links.
To support general real-time connection control services (e.g., the proposed rerouting
service), extensions to the SS7-based signaling network are proposed with source-routing
associated-CCS and inband signaling to provide fast distributed signaling transport and
synchronization data transport respectively.
To facilitate robust handoffs or to maintain the probability of forced call termination
due to handoff blocking under non-stationary call arrival condition, a novel "dynamic
guard channel resource management architecture" is proposed to adapt the number of
guard channels in each cell according to the current estimate of the handoff arrival rate
derived from the current number of ongoing calls in neighbouring cells and the mobility
pattern, so as to keep the handoff blocking probability close to the targeted objective
while constraining the new call blocking probability to be below a given level. The
proposed scheme is applicable to channel allocation over cellular mobile networks, and
is extended to bandwidth allocation over the backbone network. It is demonstrated
that fast, robust and seamless network-wide handoffs over an ATM-based PCN can be
achieved by integrating the proposed service and architectures. Handoff performance is
analyzed in terms of handoff processing delay and forced call termination probability.
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Extent |
5664759 bytes
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Genre | |
Type | |
File Format |
application/pdf
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Language |
eng
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Date Available |
2009-03-27
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Provider |
Vancouver : University of British Columbia Library
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Rights |
For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use.
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DOI |
10.14288/1.0065156
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URI | |
Degree | |
Program | |
Affiliation | |
Degree Grantor |
University of British Columbia
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Graduation Date |
1997-05
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Campus | |
Scholarly Level |
Graduate
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Aggregated Source Repository |
DSpace
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Item Media
Item Citations and Data
Rights
For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use.