Nahrstedt, K. and Smith, J. (1996) "Design, Implementation and Experience of the OMEGA End-point Architecture", IEEE Jour. Selected Areas in Comm. 14(7), pp 1263 -- 1279.  Home/Search   Document Details and Download   Summary   Related Articles   Check

....read from a socket. Therefore, the overhead of determining bottlenecks is not significant [Knutsson98] Secondly, there are two types of resources, namely active resources such as CPUs (in the case of multiprocessors) and passive resources such as network bandwidth, memory, system bus, and disk [Nahrstedt96]. Active resources make the application progress while the passive resources can not make the applications progress. However, active resources need to access passive resources, and if a passive resource is not available, they block. This means that although we allocate enough active resources to ....

Nahrstedt, K. and Smith, J. (1996) "Design, Implementation and Experience of the OMEGA End-point Architecture", IEEE Jour. Selected Areas in Comm. 14(7), pp 1263 -- 1279.

....drawbacks of reservations are that underlying support is not widely available, and allocated resources can be underutilized, resulting in inefficiency. A number of systems looked at application specific scheduling in reservation capable environments, for example, the OMEGA end system architecture [39], 40] A number of systems share our goal of supporting userspecified, adaptive streaming data applications, including CANS [9] Conductor [41] Darwin [5] End to end Media Paths [2] Ninja [42] PATHS [43] and [12] Central to all of these systems is the notion of paths of stream ....

K. Nahrstedt and J. M. Smith, "Design, implementation and experiences of the omega end-point architecture," Department of Computer and Information Science, the University of Pennsylvania, Tech. Rep. MSCIS -95-22, 1995.

....in Heidelberg. This model provides guarantees in the end systems and core network; Extended Integrated Reference Model (XRM) LaBh94] developed by the COMET group at Columbia University, that is a modelling framework for control and management of multimedia telecommunications network; OMEGA [NaSm95] developed by the University of Pennsylvania. It is examining the relationship between application QoS requirements and the ability of local and resource management to satisfy these demands; Quality of Service Architecture (QoS A) CaCo93] describes a layered architecture of services and ....

Nahrstedt, K., Smith, J., "Design, Implementation and Experiences of the OMEGA End Point Architecture", Technical Report (MS-CIS-95-22), University of Pensylvania, May 1995.

....user inj trans79o.rt and computing management ction user access D plan, U plan, broadband Networking multimedia Computing Figure 4. XRM 3. 3 OMEGA Over the past three years the University of Pennsylvania has been developing an end point architecture called the OMEGA architecture [70]. OMEGA is the result of an interdisciplinary research effort that is examining the relationship between application QoS requirements (which make stringent resource demands) and the ability of local (the operating system) and global resource management (combining communication and remotely managed ....

.... EN EON) E (E) E) N E E AD ENRS ISO [67] E) N) E N E N E N E N Heidelberg (E) N) E N E N E (N) E) N) N E D E R S [71] TINA [76] E) N) N (N) N) IETF [62] E N E E N E N R Tenet [84] E N N N N N (E) N E D E R S MASI [77] E (N) E (N) E E E E E OMEGA E, N) E, N) E (N) E (N) E E E E R [70] WashU [63] E E E E E R Table 1: Comparison of QoS Architectures a. The term E2E coordination refers to the coordination of end system and network resources for flows. This could be provided by a resource reservation protocol (e.g. RSVP [48] connection setup protocol (e.g. RCAP [51] or ....

Nahrstedt K. and J. Smith, "Design, Implementation and Experiences of the OMEGA End-Point Architecture", Technical Report (MS-CIS-95-22), University of Pennsylvania, May 1995, ( submitted to JSAC).

....develop these functionalities. This approach, which can be called Application Aware Networking (AAN) has been and is still currently performed within several projects and architecture proposals, particularly OSI 95 [18] RACE CIO [19] BERKOM [20] TENET [21] QoS A architecture [22] OMEGA [23], Function based Communication SubSystem [24] End System Architecture [25] or CESAME [26] This paper presents a global multimedia architecture that integrates the advanced transport AAN approach initiated in [27 31] and gives the corresponding implementation and experiments. In the following ....

K. Nahrstedt, J.Smith. "Design, Implementation and Experiences of the OMEGA EndPoint Architecture", IEEE Journal on Selected Areas in Communications, vol.14, n7, september 1996.

....of implementation constraints and overheads, and simultaneous management of CPU and link bandwidth for transmission and reception. End host architectures for QoS: A number of projects have focused on developing appropriate end host architectures capable of supporting QoS guarantees. The OMEGA [48] end point architecture provides support for end to end QoS guarantees. In this architecture, application QoS requirements are translated to network QoS requirements by the QoS Broker [49] which negotiates for the necessary host 24 and network resources. The OMEGA approach assumes appropriate ....

K. Nahrstedt and J. M. Smith, "Design, implementation and experiences of the OMEGA end-point architecture, " IEEE Journal on Selected Areas in Communications, vol. 14, no. 7, pp. 1263--1279, September 1996.

....our primary focus on unicast real time channels. We note that the architectural approach, mechanisms, and extensions developed in this dissertation are applicable to unicast as well as multicast sessions, for both sender initiated and receiver initiated signalling. QoS architectures: The OMEGA [132] end point architecture provides support for endto end QoS guarantees. In this architecture, application QoS requirements are translated to network QoS requirements by the QoS Broker [131] which negotiates for the necessary 37 host and network resources. The OMEGA approach assumes appropriate ....

K. Nahrstedt and J. M. Smith, "Design, implementation and experiences of the OMEGA end-point architecture," IEEE Journal on Selected Areas in Communications, vol. 14, no. 7, pp. 1263--1279, September 1996.

....Recommendations for ATM, such as I.356 [6] and I. 371 [14] Furthermore, work on QoS in academia and industrial research centers include: ffl OSI 95 [15] ffl QoS A (Quality of Service Architecture) 16] 17] 18] ffl F CSS (Function based Communication Subsystem) 19] 20] ffl QoS Broker [21], 22] ffl CINEMA (Configurable Integrated Multimedia Architecture) 23] ffl QoS Management [24] ffl HeiTS (Heidelberger Transport System) 25] ffl Extended Integrated Reference Model [26] ffl TINA (Telecommunications Information Networking Architecture) 27] and ffl ANSA (Advanced ....

K. Nahrstedt and J. Smith, "Design, Implementation and Experiences of the OMEGA End-Point Architecture," Tech. Rep. TR-95-22, Distributed Systems Laboratory, University of Pennsylvania, Philadelphia, Pennsylvania, U.S.A., 1995.

....reservation setup at the sender (similar to RTCOP) We note that the architectural approach, mechanisms, and extensions developed in this paper are applicable to unicast as well as multicast sessions, for both sender initiated and receiver initiated signalling. QoS architectures: The OMEGA [19] end point architecture provides support for end to end QoS guarantees. The primary focus of OMEGA is development of an integrated framework for the specification and translation of application QoS requirements and allocation of the necessary resources. Application QoS requirements are translated ....

K. Nahrstedt and J. M. Smith, "Design, implementation and experiences of the OMEGA end-point architecture," IEEE Journal on Selected Areas in Communications, vol. 14, no. 7, pp. 1263--1279, September 1996.

....develop these functionalities. This approach, that can be called Application Aware Networking (AAN) has been and is still currently performed within several projects and architecture proposals, particularly OSI 95 [18] RACE CIO [19] BERKOM [20] TENET [21] QoS A architecture [22] OMEGA [23], Function based Communication SubSystem [24] End System Architecture [25] or CESAME [26] This paper presents a global multimedia architecture that integrates the advanced transport AAN approach initiated in [27 31] and gives the corresponding implementation and experiments. In the following ....

K. Nahrstedt, J.Smith. "Design, Implementation and Experiences of the OMEGA EndPoint Architecture", IEEE Journal on Selected Areas in Communications, vol.14, n°7, september 1996.

....Function SMA = System Management Agent SMM = System Management Manager (N) PCF Figure 3.7 OSI QoS Framework 3.3. 3 The Pennsylvania University OMEGA Architecture During the last three years the University of Pennsylvania has been developing an endpoint architecture called the OMEGA architecture [Nahrstedt,95c] OMEGA is the result of 49an interdisciplinary research effort examining the relationship between application QoS requirements (which make stringent resource demands) and the ability of local (the operating system) and global resource management (combining communication and remotely managed ....

Nahrstedt K. and J. Smith, "Design, Implementation and Experiences of the OMEGA End-Point Architecture", Technical Report (MS-CIS-95-22), University of Pennsylvania, May 1995, ( submitted to JSAC).

....to a flow. The construction of profiles through re usable software modules have been shown to be viable in the CESAME project [75] 4. 9 The OMEGAArchitecture Over the last three years the University of Pennsylvania has been developing a end point architecture called the OMEGA architecture [104]. OMEGA is the result of an interdisciplinary research effort that is examining the relationship between application QoS requirements (which make stringent resource demands) and the ability of local (the operating system) and global resource management (combining communication and remotely managed ....

....Protocol. RTAP) Both subsystems must provide QoS guaranteed services over specified calls connections for applications. Therefore, they require guarantees on the resources needed for communications. Resource guarantees are negotiated during call establishment by the QoS Broker protocol [104] which is present in both the application and transport subsystems. For full details of the communication and resource models see [104] 4.10 The Washington University End System QoS Framework Other significant work at Washington University by Gopal and Purulkar [63] has developed a QoS framework ....

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Nahrstedt K. and J. Smith, "Design, Implementation and Experiences of the OMEGA End-Point Architecture", Technical Report (MS-CIS-95-22), University of Pennsylvania, May 1995, ( submitted to JSAC).

....is currently being realised as part of a binding architecture [28] for open signalling, control and management of multimedia networks. Figure 4. XRM 3. 3 OMEGA Over the past three years the University of Pennsylvania has been developing an end point architecture called the OMEGA architecture [70]. OMEGA is the result of an interdisciplinary research effort that is examining the relationship between application QoS requirements (which make stringent resource demands) and the ability of local (the operating system) and global resource management (combining communication and remotely managed ....

.... E (N) E (E) E) N E E A D E N R S ISO [67] E) N) E N E N E N E N Heidelberg [71] E) N) E N E N E (N) E) N) N E D E R S TINA [76] E) N) N (N) N) IETF [62] E N E E N E N R Tenet [84] E N N N N N (E) N E D E R S MASI [77] E (N) E (N) E E E E E OMEGA [70] E, N) E, N) E (N) E (N) E E E E R WashU [63] E E E E E R Table 1: Comparison of QoS Architectures 5. Discussion All QoS architectures surveyed in section 3 consider QoS specification (e.g. services contracts, flow specs, and service and traffic classes, etc. to be fundamental in ....

Nahrstedt K. and J. Smith, "Design, Implementation and Experiences of the OMEGA End-Point Architecture", Technical Report (MS-CIS-95-22), University of Pennsylvania, May 1995, ( submitted to JSAC).

....the literature suggests, reduces the likelihood of the on set of congestion Figure 4 6. Heidelberg QoS Model 4.4 Other QoS Architectures 4.4. 1 The OMEGA Architecture Over the last three years the University of Pennsylvania has been developing a end point architecture called the OMEGA architecture [84]. OMEGA is the result of an interdisciplinary research effort that is examining the relationship between application QoS requirements (which make stringent resource demands) and the ability of local (the operating system) and global resource management (combining communication and remotely managed ....

Nahrstedt K. and J. Smith, "Design, Implementation and Experiences of the OMEGA End-Point Architecture", Technical Report (MS-CIS-95-22), University of Pennsylvania, May 1995, ( submitted to JSAC).

....This scheme promotes efficient use of network resources, and as the literature suggests, reduces the likelihood of the on set of congestion 4. 5 The OMEGAArchitecture Over the last three years the University of Pennsylvania has been developing a end point architecture called the OMEGA architecture [84]. OMEGA is the result of an interdisciplinary research effort that is examining the relationship between application QoS requirements (which make stringent resource demands) and the ability of local (the operating system) and global resource management (combining communication and remotely managed ....

Nahrstedt K. and J. Smith, "Design, Implementation and Experiences of the OMEGA End-Point Architecture", Technical Report (MS-CIS-95-22), University of Pennsylvania, May 1995, ( submitted to JSAC).

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