Matthew J Cheng

US Patent:

8108727, Jan 31, 2012

Filed:

Dec 24, 2008

Appl. No.:

12/344031

Inventors:

Matthew Cheng - Avenel NJ, US

Assignee:

Broadcom Corporation - Irvine CA

International Classification:

G06F 11/00

US Classification:

714 28, 714 381, 703 21, 703 22

Abstract:

The present invention provides a method to test a protocol stack operable to be loaded to a wireless terminal. This involves the creation of simulation scripts from prior test case logs associated with a prior test case executed on a physical wireless terminal. When the prior test case is failed on a physical device, the simulation scripts are used to locate and correct errors in protocol stack. The simulation scripts are then stored within and retrieved from a library. These simulations scripts are loaded within a simulation environment within computer systems such as a personal computer. The simulation scripts are executed on the protocol stack within the simulation environment to produce a set of results. These results are then compared to a reference log, wherein a favorable comparison indicates a satisfactory simulation. Should an unfavorable comparison result, the protocol stack may be revised.

US Patent:

20020150094, Oct 17, 2002

Filed:

Oct 26, 2001

Appl. No.:

10/036032

Inventors:

Matthew Cheng - Avenel NJ, US
John Lee - Neptune NJ, US
Melbourne Barton - Somerville NJ, US

International Classification:

H04L012/28

US Classification:

370/389000, 370/395100

Abstract:

Hierarchical Level-Based IP Multicasting (HLIM) is a method for the multicasting of data packets from a source to a number of receivers on a network that supports both host and network mobility. In HLIM, IP routers are assigned to hierarchical levels to become hierarchical designated routers. The hierarchical levels also are used to define a scope region in which multicast data packets are to be delivered. Each scope region is associated with a unique root identifier (RID). Scope region information and root identifiers are placed into a multicast address so that multicast packers of data will be distributed to routers and hosts within the scope region. If a host (receiver or source) or sub-network moves out of the scope region but desires to continue receiving multi-cast packets the host can request receipt of such packets from its new parent hierarchical designated router through use of the RID and associated binding point (BPT). In this manner, HLIM provides a shared and shortest-path multicast tree without using a center point like a core or rendezvous point. HLIM supports not only host mobility (movements of IP hosts) but also network mobility (movements of IP routers with/without hosts). HLIM is oriented to operate in hierarchical networks, but can be also applied to flat networks by emulating the networks into organized hierarchical networks through mechanisms such as the Private Network-to-Network Interface (“PNNI”) protocol used in ATM or multimedia support for mobile wireless networks (“MMWM”). Thus, HLIM can be implemented as long as the network nodes are connected in a hierarchy, physically or virtually.

US Patent:

20060085687, Apr 20, 2006

Filed:

Oct 15, 2004

Appl. No.:

10/967043

Inventors:

Matthew Cheng - Avenel NJ, US

International Classification:

G06F 11/00

US Classification:

714038000

Abstract:

The present invention provides a method to test a protocol stack operable to be loaded to a wireless terminal. This involves the creation of simulation scripts from prior test case logs associated with a prior test case executed on a physical wireless terminal. When the prior test case is failed on a physical device, the simulation scripts are used to locate and correct errors in protocol stack. The simulation scripts are then stored within and retrieved from a library. These simulations scripts are loaded within a simulation environment within computer systems such as a personal computer. The simulation scripts are executed on the protocol stack within the simulation environment to produce a set of results. These results are then compared to a reference log, wherein a favorable comparison indicates a satisfactory simulation. Should an unfavorable comparison result, the protocol stack may be revised. The above process may then be repeated on the revised protocol stacks following the detection, location and correction of errors within the protocol stack.