Architecting the Telecommunication Evolution: Toward Converged Network Services

by Gurbani; Vijay K.

• ISBN13: 9780849395673
• ISBN10: 0849395674
• Edition: 1st
• Format: Hardcover
• Copyright: 2006-09-12
• Publisher: Auerbach Public

Summary

Service-oriented architecture (SOA) uses services as the baseline for developing new architectures and applications, as networks are built specifically to satisfy service requirements. Most services are currently handled over different networks, but newer services will soon require cross-network support. Architecting the Telecommunication Evolution: Toward Converged Network Services outlines the challenges of providing crossover services and the new architectures and protocols that will enable convergence between circuit- and packet-switched networks.Taking a standards-based approach to converged services, this book lays a foundation for SOA in telecommunications. The authors begin by outlining the development of Internet telephony, focusing on how to use the respective benefits of the traditional public switched telephone network (PSTN) and the Internet to create and implement more value-added services. These two eminent specialists first examine services that originate in the Internet and take advantage of PSTN services, and then explore how discrete events on the PSTN can be used as an impetus to creating services on the Internet. They conclude with a discussion on how this convergence creates smart spaces in the telecoms domain.Including eight valuable appendices that will aid in the implementation of converged services, Architecting the Telecommunication Evolution is the first book of its kind to offer a survey as well as a practical roadmap to integrating modern networks to achieve better performance and new functionality.

Table of Contents

Foreword	xiii
The Authors	xv
Acknowledgments	xvii
List of Abbreviations and Symbols	xix
1 Introduction	1	(8)
1.1 The Evolution of Internet Telephony	3	(1)
1.2 Problem Statement	4	(1)
1.3 Solutions	5	(4)
1.3.1 The First Stage: Accessing Native PSTN Services from Internet Telephony Endpoints	6	(1)
1.3.2 The Second Stage: PSTN Events as a Precursor for Internet Services	6	(1)
1.3.3 The Third Stage: Pervasive Computing and Telecommunication Services	7	(2)
2 Internet Telephony: The Evolution to a Service-Oriented Architecture	9	(12)
2.1 Introduction	10	(1)
2.2 Service Architecture for Traditional Telephone Network	11	(2)
2.3 Internet Services Architecture	13	(1)
2.4 Requirements of a Telecommunications SOA	14	(4)
2.5 Conclusion	18	(3)
3 Background: Providing Telephony Service	21	(28)
3.1 Service Architecture for the Wireline Public Switched Telephone Network	22	(19)
3.1.1 General Architecture of the PSTN	22	(2)
3.1.2 The Intelligent Network	24	(1)
3.1.3 The IN Conceptual Model	25	(2)
3.1.3.1 Service Plane	25	(1)
3.1.3.2 Global Functional Plane	26	(1)
3.1.3.3 Distributed Functional Plane	27	(1)
3.1.3.4 Physical Plane	27	(1)
3.1.4 Physical Entities in an IN-Enabled Network	27	(3)
3.1.4.1 Service Switching Point (SSP)	28	(1)
3.1.4.2 Service Data Point (SDP)	29	(1)
3.1.4.3 Service Control Point (SCP)	29	(1)
3.1.4.4 Intelligent Peripheral	30	(1)
3.1.4.5 Adjunct	30	(1)
3.1.4.6 Service Node (SN)	30	(1)
3.1.4.7 Service Creation Environment Point (SCEP)	30	(1)
3.1.4.8 Service Management Point (SMP)	30	(1)
3.1.5 The Basic Call State Machine, Points in Call, and Detection Points	30	(3)
3.1.6 The IN Capability Sets	33	(1)
3.1.7 Originating BCSM (O_BCSM)	34	(4)
3.1.8 Terminating BCSM (T_BCSM)	38	(3)
3.2 Service Architecture for the Cellular Public Switched Telephone Network	41	(4)
3.2.1 Physical Entities in WIN	42	(2)
3.2.1.1 Mobile Switching Center (MSC)	43	(1)
3.2.1.2 Base Station (BS)	43	(1)
3.2.1.3 Authentication Center (AC)	43	(1)
3.2.1.4 Home Location Register (HLR)	43	(1)
3.2.1.5 Visitor Location Register (VLR)	44	(1)
3.2.1.6 Short Message Entity (SME)	44	(1)
3.2.1.7 Message Center (MC)	44	(1)
3.2.2 WIN PICs and DPs	44	(1)
3.3 Service Architecture for Internet Telephony	45	(4)
3.3.1 Service Specification in Internet Telephony	47	(1)
3.3.1.1 SIP CGI	47	(1)
3.3.1.2 CPL	47	(1)
3.3.1.3 SIP Sep/lets	48	(1)
3.3.2 Service Residency in Internet Telephony	48	(1)
4 Comparative Analysis of Signaling Protocols	49	(14)
4.1 Desirable Properties of a Candidate Protocol	49	(2)
4.1.1 Widespread Acceptance	50	(1)
4.1.2 Protocol Expressiveness	50	(1)
4.1.3 Protocol Extensibility	50	(1)
4.1.4 Primitives for Capability Description and Negotiation	50	(1)
4.1.5 Transaction-Style Message Exchanges	50	(1)
4.1.6 Support for an Event-Based Communications Model	51	(1)
4.1.7 Support for a Flexible Naming Scheme	51	(1)
4.2 Protocols Evaluated	51	(8)
4.2.1 BICC	51	(1)
4.2.2 H.323	52	(1)
4.2.3 SIP	53	(6)
4.3 Comparative Analysis	59	(2)
4.4 The Novel SIP-Based Approach	61	(2)
5 Crossover Services Originating on the Internet	63	(38)
5.1 Introduction	63	(1)
5.2 Motivation	64	(2)
5.2.1 Rewrite Services for Internet Telephony	64	(1)
5.2.2 Using a Platform-Neutral Service Creation and Execution Environment	65	(1)
5.2.3 Exploring New Techniques to Reuse Existing Services	65	(1)
5.3 Call Model Mapping with State Sharing (CMM/SS)	66	(6)
5.3.1 CMM/SS: Preliminaries	66	(1)
5.3.2 CMM/SS: The Technique and Algorithms	67	(2)
5.3.3 CMM/SS: State Sharing and Global State	69	(2)
5.3.4 CMM/SS: Issues	71	(1)
5.4 Implementing CMM/SS	72	(15)
5.4.1 CMM/SS Considerations	73	(3)
5.4.1.1 The Concept of a Call State Model in SIP	74	(2)
5.4.1.2 Relationship between an SCP and a CMM/SS Entity	76	(1)
5.4.1.3 Support of Announcements and Mid-Call Signaling	76	(1)
5.4.2 CMM/SS Architectural Model	76	(1)
5.4.3 Realizing CMM/SS in Software	77	(2)
5.4.4 Applying the Mapping	79	(8)
5.4.4.1 Mapping SIP to O_BCSM	79	(4)
5.4.4.2 Mapping SIP to T_BCSM	83	(4)
5.5 Results from CMM/SS	87	(6)
5.5.1 Network Topology	88	(1)
5.5.2 Results	89	(1)
5.5.3 Service Description and Call Flows	90	(12)
5.5.3.1 Originating Call Screening (OCS)	90	(1)
5.5.3.2 Abbreviated Dialing (AD)	91	(1)
5.5.3.3 Call Forwarding (CF)	92	(1)
5.5.3.4 Calling Name Delivery (CNAM)	92	(1)
5.6 Performance of CMM/SS	93	(2)
5.7 CMM/SS: A General Solution	95	(1)
5.8 Limitations of CMM/SS	96	(2)
5.9 Related Work	98	(2)
5.10 Conclusion	100	(1)
6 Crossover Services Originating on the Public Switched Telephone Network	101	(38)
6.1 Introduction	102	(3)
6.1.1 Motivation	102	(1)
6.1.2 Genealogy and Relation to Standards Activities	103	(2)
6.1.3 Contributions	105	(1)
6.2 Architecture for PSTN-Originated Crossover Services	105	(3)
6.3 Research Challenges	108	(10)
6.3.1 Choosing Target Events	108	(3)
6.3.1.1 Call-Related Events	108	(1)
6.3.1.2 Noncall-Related Events	108	(3)
6.3.1.3 Application-Specific Events	111	(1)
6.3.2 Modeling PSTN-Originated Crossover Services as a Wide Area Event Notification Service	111	(1)
6.3.3 Representing the Events	112	(3)
6.3.4 Choosing a Protocol	115	(2)
6.3.5 Aggregating Events before Publication	117	(1)
6.3.6 Scalability of the EM	117	(1)
6.3.7 Privacy, Security, and Trust	118	(1)
6.4 An XML Schema to Represent Events in the PSTN	118	(2)
6.4.1 The [spirits-event> Element 118
6.4.2 The [Event> Element 119
6.5 Proposed Extensions to SIP	120	(4)
6.5.1 The Asynchronous Event Notification Framework in SIP	120	(1)
6.5.2 The Extensions	121	(3)
6.5.2.1 The spirits-INDPs Event Package	122	(1)
6.5.2.2 The spirits-user-prof Event Package	123	(1)
6.6 Examples	124	(7)
6.6.1 Notification of Missed Calls	125	(2)
6.6.2 Presence for a Principal Using a Wireline PSTN Endpoint	127	(2)
6.6.3 Presence for a Principal Using a Cellular PSTN Endpoint	129	(1)
6.6.4 Helping First Responders	130	(1)
6.6.5 Schema Extension: Notifications for Low Prepaid Card Balance	131	(1)
6.7 A Taxonomy of PSTN-Originated Crossover Services	131	(2)
6.8 SIP: The Distributed Middleware	133	(3)
6.9 Related Work	136	(1)
6.10 Conclusion	137	(2)
7 Smart Spaces in the Telecommunications Domain	139	(42)
7.1 Introduction	140	(2)
7.2 Research Thrusts of Pervasive Computing	142	(1)
7.2.1 Effective Use of Smart Spaces	142	(1)
7.2.2 Invisibility	142	(1)
7.2.3 Localized Scalability	143	(1)
7.2.4 Masking Uneven Conditions	143	(1)
7.3 Implementing a Telecommunications Smart Space	143	(23)
7.3.1 The Main Actors	144	(1)
7.3.2 Authentication and Encryption	144	(3)
7.3.3 Policies	147	(2)
7.3.4 Constructing a Telecommunications Smart Space	149	(17)
7.3.4.1 The Presence Service	151	(4)
7.3.4.2 Availability	155	(3)
7.3.4.3 An IM from the Telephone Network	158	(4)
7.3.4.4 Transforming an SMS to an IM	162	(2)
7.3.4.5 Location-Based Services	164	(2)
7.4 Design and Implementation of the Event Manager	166	(4)
7.4.1 Design of the EM	167	(3)
7.5 Performance Analysis of the Event Manager	170	(6)
7.5.1 Assumptions and Realities	170	(1)
7.5.2 Determining Service Time per Event	171	(1)
7.5.3 Calculating Blocking Probability: Erlang-B Analysis	172	(2)
7.5.4 Modeling the Event Manager as an M/D/1 Queue	174	(2)
7.6 Related Work	176	(3)
7.7 Conclusion	179	(2)
8 Conclusions	181	(4)
Appendices
A The SPIRITS (Services in PSTN Requesting Internet Services) Protocol	185	(50)
B Interworking SIP and Intelligent Network (IN) Applications	235	(26)
C XML Schema for PSTN Events	261	(4)
D XML Schema for SMS to IM	265	(2)
E Raw Data for Event Manager Performance Analysis	267	(2)
F Bibliography	269	(10)
Index	279