Jangkyung Kim

Standardization activities and technology competitors for the in-home networking

The in-home networking is critical for distribution of data to the various customer devices that will be attached-TVs, PCs, stereos, alarms, and so on. It must support multiple data types with high security, easy configuration, low cost, and negligible maintenance. This paper overviews the in-home networking with emphasis on its standardization activities of ATM Forums RBB working group and DAVIC, and its implementation technology competitors such as the IEEE 1394 Firewire and the ATM Warren. Then we suggest the further important considerations of these technologies.

The implementation issues of an adaptor for ATM-based LANs

ATM-based LANs can provide much greater capacity than current shared medium LANs and support multimedia traffic such as audio, video, and data. The key component for an ATM LAN is an ATM adaptor for attaching a PC or workstation to an ATM switch or hub. We have made a prototype of an adaptor for ATM LANs with a data rate of 100 Mbps (ATM Forum UNI spec. V3.0). We first analyze the basic design requirements for handling ATM communication services. Based on this analysis, we then discuss the implementation issues of an ATM adaptor for the LAN environment.<<ETX>>

Performance comparison of branch point algorithms for multicast ABR flow control

This paper compares the performance of feedback consolidation algorithms with/without a fast overload indication function at a branch point switch for multicast (or point-to-multipoint) available bit rate (ABR) flow control in ATM networks. A new backward resource management (BRM) cell-discarding policy is proposed which controls additional BRM cell overhead due to fast overload indication function. The performance of various consolidation algorithms with the proposed fast overload indication function is also compared using simulations. The simulation results show that a fast overload indication function is very effective in a severe overload situation, particularly in an initial period with a higher initial cell rate. The fast overload indication function can be also combined with any feedback consolidation algorithm. However, its performance is highly dependent on the underlying basic consolidation algorithm employed.

Performance evaluation of relative rate marking switches for ABR service in ATM networks

This paper investigates the performance of relative rate marking (RRM) switch algorithms for rate-based available bit rate (ABR) service in asynchronous transfer mode (ATM) networks. An RRM switch can be implemented differently according to the congestion detection and notification methods used. The performance of an RRM switch strongly depends on the choice of the control parameters and the congestion detection scheme used. We introduce two implementation schemes for an RRM switch, and then analyze the maximum and minimum queue lengths for each scheme in steady state. Furthermore, we derive the closed form equations of link utilization and cell loss probability. The analytical results presented can be used to estimate the buffer requirement and to determine appropriate values for the various control parameters.

ALAX—A P1355‐based architecture for an ATM LAN access switch, with application to ATM onboard switching

We draw attention to the new IEEE P1355 Standard for Heterogeneous InterConnect as a possible platform to support several onboard processing functions, including onboard communications and onboard ATM switching. The main features of IEEE P1355 are illustrated through a discussion of the basic principles and protocol architecture of ALAX, the ATM LAN Access Switch, currently under design in the Laboratory for Advanced Switching Technologies at the University of Maryland, College Park.