| Patent Number |
Title Of Patent |
Date Issued |
| 6856592 |
Method of providing restoration routes in a mesh network |
February 15, 2005 |
| A method of providing restoration routes for protecting traffic in a mesh network is described. The method comprises the steps of generating a set of eligible restoration routes for each span in the network, establishing a bi-criteria objective function in terms of route length and capac |
| 6856214 |
Surface wave devices with low passband ripple |
February 15, 2005 |
| Very low passband ripple is provided in a wide bandwidth high frequency SAW FIR filter using slanted finger IDTs by one or more of three techniques: cancelling regenerated SAWs at parallel-connected input IDTs of two SAW filters which are similar except for a quarter-wavelength differenc |
| 6854091 |
Method of displaying nodes and links |
February 8, 2005 |
| The present invention relates to an improved method of displaying nodes, and links between nodes. Instead of the conventional method of displaying nodes and links as points and lines respectively, in accordance with the present invention, the nodes are each represented by parallel node l |
| 6854014 |
System and method for accounting management in an IP centric distributed network |
February 8, 2005 |
| A system and method for a first user to communicate in an Internet Protocol (IP) centric distributed network is described. The method can include a plurality of service layers including a network service function layer, a local service function layer, and an access service function layer |
| 6854013 |
Method and apparatus for optimizing network service |
February 8, 2005 |
| There is presently no single accepted scheme to support Quality of Service guarantees for IP based applications, although RSVP is the prevailing standard for network resource reservation. Thus, providing end-to-end Quality of Service guarantees for content delivery across the Internet |
| 6853842 |
System and method for using mobile station signal strength measurements to collect radio frequen |
February 8, 2005 |
| A system and method collects radio frequency isolation values with the assistance of mobile stations operating within a cellular wireless communication system. A broadcast channel and a broadcast cell/sector are first chosen. Then, the broadcast channel is disabled in neighboring (or |
| 6853763 |
Photonic switching including photonic pass-through and add/drop capabilities |
February 8, 2005 |
| A photonic switching apparatus includes primary photonic switching logic to perform photonic pass-through and add/drop functions and secondary photonic switching logic to reduce the effective number of add/drop interfaces and/or switch optical signal channels to and from clients or c |
| 6853719 |
Provision of media content to telephony callers on-hold |
February 8, 2005 |
| A method of providing media content, such as music and video, to callers on hold involves the generation of the media content locally in the environment of the held caller, rather than the transmission of the content over the network. The local call server of the held caller is signa |
| 6853713 |
Client-server network for managing internet protocol voice packets |
February 8, 2005 |
| A client-server network for managing internet protocol voice data packets includes a client terminal, for receiving internet protocol voice data packets; a graphical display, for conveying information to a client terminal user; a client terminal controller, for controlling the client |
| 6853696 |
Method and apparatus for clock recovery and data qualification |
February 8, 2005 |
| A system for recovering a clock signal from a data signal is described. The system uses an oscillator adapted to generate an oscillator output signal, a first detecting circuit for obtaining a coarse frequency-lock condition between the data signal and a recovered clock signal, a second |
| 6853641 |
Method of protecting traffic in a mesh network |
February 8, 2005 |
| Method and apparatus for protection of traffic in a mesh network are disclosed. A source node sends duplicate copies of data packets of the protected traffic on physically diverse paths through the network. The data packets include a sequence number for determining their position in |
| 6853634 |
Anonymity in a presence management system |
February 8, 2005 |
| A presence management system allows connections between watching parties and watched parties in a multiple access communications network to be managed. When the presence management system receives a contact request from a watching party it determines whether the required watched party is |
| 6853630 |
Method and apparatus for merging accounting records to minimize overhead |
February 8, 2005 |
| A method and apparatus for merging accounting records to minimize overhead is provided. The method and apparatus accumulate accounting information for data transmissions between a wireless communication device and a host on a data network. The method and apparatus are capable of accumula |
| 6853264 |
Input power limiter for a microwave receiver |
February 8, 2005 |
| A power limiter for limiting power of high frequency signals at an input to a receiver comprises a plurality of transmission line sections connected in succession. Each section has a series inductance coupling an input to an output of the section, and a shunt capacitance constituted by |
| 6850989 |
Method and apparatus for automatically configuring a network switch |
February 1, 2005 |
| A method and apparatus for automatically configuring a network switch having external network data ports, a processor, and memory. Network data is monitored on the external network data port. Information about the network data traffic is compared to one or more threshold conditions. The |
| 6850481 |
Channels estimation for multiple input--multiple output, orthogonal frequency division multiplex |
February 1, 2005 |
| The distortion in the sub-carrier signals is determined by transmitting known values that are incorporated into the preamble portion of the frame and/or are incorporated into pilot symbols that are inserted into the data portion of the frame. The receiver typically receives these known v |
| 6850253 |
Representing network link and connection information in a graphical user interface suitable for |
February 1, 2005 |
| A method, network management tool, graphical user interface or computer readable medium in which network link and connection information is represented by lines having different visual characteristics that are used to represent in-service links, out-of-service links, and connections. In |
| 6847821 |
Method and system in a wireless communications network for the simultaneous transmission of both |
January 25, 2005 |
| A method and system in a wireless communications network for the simultaneous transmission of voice and non-voice data over a single dedicated radio frequency channel to a mobile unit having a primary transmission bandwidth. Initially, voice data are transmitted to a mobile unit via |
| 6847769 |
Optical fiber amplifier |
January 25, 2005 |
| An optical amplifier comprises a doped fiber core and a cladding layer surrounding the core. The mode field diameter of the fiber is greater than 8 .mu.m and the refractive index difference between the core and the cladding layer is selected such that the cut-off wavelength at which the |
| 6847632 |
Method and apparatus for digital cellular internet voice communications |
January 25, 2005 |
| A digital cellular handset capable of supporting voice communications over the Internet, in addition to the digital cellular handset's usual mode of voice communications over the digital cellular network/public telephony network is disclosed. Internet protocol software such as H.323, Ses |
| 6845400 |
Storing subscriber location indication at DNS, to enable location specific provision of internet |
January 18, 2005 |
| Methods, apparatus, and software for accessing location based Internet services by automatically populating DNS tables with subscriber location information. The DNS tables are updated responsive to information provided on subscriber call set-up. The location may be derived directly for t |
| 6845397 |
Interface method and system for accessing inner layers of a network protocol |
January 18, 2005 |
| A method of performing network communications includes receiving a datagram for transmitting information over a network, selecting a layer in a network protocol stack to establish communication over the network using an inner layer application programming interface (IL API), establishing |
| 6845389 |
System and method for broadband multi-user communication sessions |
January 18, 2005 |
| A system and method of setting up a multi-user communication session over a global computer network are provided. The method includes first sending a session participation request message from a first user to a second user, where the session participation request message includes the fir |
| 6845246 |
Location based power control for mobile communications systems |
January 18, 2005 |
| A method and apparatus for facilitating power control within mobile radio systems. The power control is a function of location of the mobile station. Power levels are mapped to a geographic grid and power levels are set based upon such pre-determined power levels. Alternatively, initial |
| 6842868 |
Connection integrity monitor for digital selection circuits |
January 11, 2005 |
| A connection integrity monitor is provided wherein, for large switch fabrics (connection circuits), gate usage and power requirements are reduced by a value approaching 50% when compared to a previously disclosed connection integrity monitor. Rather than simultaneously monitoring the |
| 6842788 |
Computing and using resource colors for composite links |
January 11, 2005 |
| A router can consider two color vectors for a path including multiple links through a network. One color vector indicates colors that all of the multiple links include. Another color vector indicates the colors that none of the multiple links include. In setting up a constraint-based lab |
| 6842781 |
Download and processing of a network management application on a network device |
January 11, 2005 |
| A method and system is provided for performing a network management task on a network device. The network device loads a network management application capable of performing the network management task onto the network device in response to a request. Loading may include accessing an |
| 6842630 |
Method and apparatus for assigning frequency channels to a beam in a multi-beam cellular communi |
January 11, 2005 |
| Methods, apparatus, media and signals for assigning frequency channels to a beam in a multi-beam cellular communications system are disclosed. One method involves receiving an indication of channel quality representing a channel quality in the second region, of a frequency channel used i |
| 6842587 |
Use of amplified spontaneous emission from a semiconductor optical amplifier to minimize channel |
January 11, 2005 |
| A semiconductor optical amplifier (SOA) is placed in the optical path between the tunable laser and the external modulator on a DWDM optical transmitter. The modulator transfer function is measured using low-level amplified spontaneous emission light output from the SOA in order to find |
| 6842561 |
Optical performance monitoring scheme |
January 11, 2005 |
| A method for determining optical power in a WDM optical signal that includes extracting a representative portion of the optical signal with wavelengths within some band .delta. wherein .delta. is a subset of .DELTA., the set of all channel wavelengths present in the optical signal an |
| 6842463 |
Automated and adaptive management of bandwidth capacity in telecommunications networks |
January 11, 2005 |
| Management of the bandwidth capacity of tunnels through a network may be automated such that the network is adaptive to the stochastic nature of incoming traffic. An edge node in the network includes four main elements. Three of the elements, namely tunnel signaling, admission control an |
| 6842283 |
Generation of variable differential group delay |
January 11, 2005 |
| An apparatus for generating variable DGD is particularly for use in a PMD compensator. The apparatus has first, second and third birefringent elements arranged in order between the input and output of the compensator and having first, second and third differential group delays (DGDs) in |
| 6842011 |
Method and apparatus for locating impedance mismatches in a radio frequency communication system |
January 11, 2005 |
| A communication system uses a reflected signal to determine the location of an impedance mismatch along a transmission path. The system provides a forward signal through the transmission path, and obtains, using a feedback loop, forward signal samples and reflected signal samples from |
| 6839876 |
Preamble using Golay sequence for access channel in cellular communications systems |
January 4, 2005 |
| A preamble for a reverse access channel (RACH) of a CDMA (code division multiple access) communications system comprises a pair of constituent Golay sequences A and B concatenated with at least one pair, and preferably a plurality of different pairs, of transformed sequences which ar |
| 6839767 |
Admission control for aggregate data flows based on a threshold adjusted according to the freque |
January 4, 2005 |
| An admission controller and its method of operation for controlling admission of data flows into an aggregate data flow are described. Admitted data flows are aggregated into an aggregate data flow for transmission by a router, for example, over a data network. The aggregate data flo |
| 6839523 |
Monitoring distributed gain in an optical transmission system |
January 4, 2005 |
| In a method and system for evaluating distributed gain in an optical transmission system, a data signal and a residual pump laser signal propagating in opposite directions within a waveguide are monitored. Modulation of the residual pump laser signal is correlated with low frequency |
| 6839356 |
System and method for controlling a wireless packet switched voice call |
January 4, 2005 |
| A wireless network and serviced mobile station manages VOIP telephony calls by incorporating control information into VOIP datagrams. The control information includes an indication of the data rate of the VOIP payload of the VOIP datagram, the quality of the VOIP payload, requested data |
| 6839344 |
Transport mechanism for ISDN backhaul over IP |
January 4, 2005 |
| A method and apparatus are provided for establishing and maintaining a backhaul link over an Internet Protocol based network for transporting Layer 3 ISDN messages. A signalling gateway establishes a TCP connection to a Media Gateway Controller through the IP based network. The Layer 3 |
| 6839322 |
Method and system for optical routing of variable-length packet data |
January 4, 2005 |
| A method and system of routing variable-length packet data across a wave division multiplex (WDM) communications network having a plurality of data communications channels comprises inverse-multiplexing each data packet into a respective frame. Each frame includes a label block containin |
| 6839129 |
PMD measurement and compensation |
January 4, 2005 |
| A polarization mode dispersion (PMD) compensator for compensation of PMD in polarization bit interleaved (PBI) optical signals is disclosed. The control uses spectral analysis of components of the electrical output, particularly analysis of a spectral component having a frequency cor |
| 6836756 |
Time simulation techniques to determine network availability |
December 28, 2004 |
| A time simulation technique for determining the service availability (or unavailability) of end to and network connections (or paths) between source and sink nodes is disclosed. The method includes skips of (a) selecting a link between two network nodes; (b) performing a simulated li |
| 6836486 |
Switching of low order data structures using a high order switch |
December 28, 2004 |
| The invention relates particularly to the switching of an SDH low order VC-3 using a high order switching apparatus, such as an STS switch. A low order VC-3 is aligned with a TU-3 pointer to form a TU-3. The TU-3 is mapped into a high order VC-3 type data structure which, in turn, is |
| 6834304 |
Method and apparatus for creating a network audit report |
December 21, 2004 |
| A method and system for auditing an optical network to identify malfunctioning network elements and to generate a report which would allow skilled personnel to quickly and effectively identify areas of functionality of a deployed network element that is operating incorrectly by readi |
| 6834302 |
Dynamic topology notification extensions for the domain name system |
December 21, 2004 |
| A determination whether a network is connected to the Internet is made by configuring a first computer in the network to periodically generate a heartbeat message to a second computer outside the network. The second computer determines whether the heartbeat message is received, the recei |
| 6834053 |
Distributed traffic scheduler |
December 21, 2004 |
| A traffic scheduler controls despatch of assembled packets or cells at an adaptation interface of an asynchronous transfer mode (ATM) network supporting a plurality of ATM traffic classes on two or more ATM adaptation layers. The scheduler comprising a distributed hierarchy of indivi |
| 6832254 |
Method and apparatus for associating an end-to-end call identifier with a connection in a multim |
December 14, 2004 |
| Method and apparatus for associating an end-to-end call identifier with a connection in a multimedia packet network. An end-to-end call identifier (EECID) is provided to uniquely identify a call leg across a packet network, regardless of the number of nodes used in completing the network |
| 6832051 |
Dispersion managed optical transmission links for wavelength division multiplexed systems |
December 14, 2004 |
| A dispersion managed link for transmitting wavelength division multiplexed (WDM) optical signals and method for providing the link are disclosed. The link includes a plurality of spans serially connected by optical amplifiers. Each span includes an optically dispersive fiber connected to |
| 6831844 |
Electronic circuit unit providing EMI shielding |
December 14, 2004 |
| An electronic circuit unit for use in an electronic equipment cabinet. The electronic circuit unit has first and second opposite main walls including EMI absorbing material and a motherboard frame between the main walls, the motherboard frame including a plurality of wall segments also i |
| 6831525 |
Oscillator arrangements with improved frequency stability |
December 14, 2004 |
| Two oscillators produce respective signals at two different frequencies each dependent upon a parameter such as temperature in accordance with a polynomial with coefficients which are different for the two oscillators. A ratio of the frequencies is inverse to a ratio of a selected one of |
| 6829717 |
Method and apparatus for generating timing information |
December 7, 2004 |
| According to telecommunication standards relating to communication networks supporting an Asynchronous Transfer Mode (ATM), timing information relating to a Constant Bit Rate (CBR) service needs to be communicated between a source network entity and a destination network entity. Typi |
