xG Technology, Inc. Patent applications |
Patent application number | Title | Published |
20150045026 | SYSTEM FOR AUTOMATIC REGISTRATION OF EXPEDITIONARY TELECOMMUNICATIONS DEPLOYMENTS - A system and method for enabling voice and broadband data delivery to users in expeditionary deployments is disclosed. More specifically the system is composed of a registration server, a wireless telco network server, a wide area transport network, and an external network interconnect (like satellite or fiber location) such that when users arrive at a disaster scene where communications infrastructure has been destroyed or is unavailable, they are either handed a smart device (smartphone, laptop, tablet, etc.) or they utilize an existing smart device they brought with them (BYOD) and via the Wi-Fi interface they connect to the wide area transport network. | 02-12-2015 |
20140177445 | HYBRID ARQ SYSTEM WITH A SNAPSHOT FEEDBACK MECHANISM FOR INTERFERENCE PRONE WIRELESS NETWORKS - An IP packet transmission system is disclosed and more specifically it is a system using a hybrid ARQ method including a sliding purge window and having the transmitter opportunistically piggy-back a snapshot of the transmitter's transmit/send window in data frames. When the receiver receives this snapshot the receiver can compare it with its receive window and if a mismatch is detected, whereby the transmitter has moved on to the next packet, the receiver can now also sync up quicker and not wait for the regular timeout to progress ahead. | 06-26-2014 |
20140161061 | HYBRID ARQ SYSTEM USING A SLIDING PURGE WINDOW FOR WIRELESS NETWORKS - An IP packet transmission system is disclosed and more specifically it is a system using a hybrid ARQ method that includes a sliding purge window to reduce packet losses and improve TCP throughput thus ensuring data integrity, improving reliability, and to some extent guaranteeing in-order delivery of packets at the receiver. | 06-12-2014 |
20140139398 | MIMO ANTENNA DESIGN USED IN FADING ENVIRONMENTS - A MIMO antenna used in both transmit and receive operations, with the ability to serve an n-by-n MIMO transceiver architecture (where n can take integer values between 0 to 4). The structure is designed to increase the effective area of the array by coupling the bars of the antenna to the disc and results in good isolation and low envelope correlation. | 05-22-2014 |
20140126554 | METHOD TO ENABLE RAPID SCANNING BY COGNITIVE RADIOS - A cognitive radio scanning method is disclosed that enables cognitive radios to rapidly scan for neighboring channels by staggering the position of beacons across the frame relative to other channels and intelligently allocate the bandwidth across super frames such that a device has the ability to switch and scan multiple beacons both within and across multiple super frames. | 05-08-2014 |
20130114768 | INTERFERENCE MITIGATION METHOD FOR SINGLE OR MIMO RECEIVER DEVICES - A cognitive radio signal processing method suitable for single receiver devices where interference is mitigated using projection of received multi-dimensional signal space to maximize SNR by orthogonalizing interference is described. The method is based on a well-known LMS solution that is computed from received multi antenna and multicarrier signals in a novel way. This method solves the requirement of multiple RF chains in low cost handsets by introducing a protocol synchronous antenna switcher that allows, for example, a LTE handset with a single antenna to benefit from algorithms that typically require multiple receivers for the same frequency, i.e. MIMO. | 05-09-2013 |
20130102341 | COGNITIVE TRANSMISSION CONTROL SYSTEM - A cognitive radio transmission control system that controls the physical layer protocol based on algorithm feedback from receivers is disclosed. | 04-25-2013 |
20130089011 | COGNITIVE MOBILE TIME DIVISION DUPLEX AD-HOC NETWORK - A cognitive MANET system is disclosed that uses TDD (Time Division Duplexing) and TDMA MAC to maintain routes that allow delivery of adequate bandwidth for applications resulting in an efficient way of maintaining information on neighboring wireless terminals and access points by using a routing protocol that has a built in slot reservation algorithm. | 04-11-2013 |
20130021914 | MEASUREMENT COORDINATION FOR DYNAMIC SPECTRUM ACCESS MEASUREMENTS IN A TIME DIVISION DUPLEX SYSTEM - The invention disclosed in this application describes methods to coordinate spectrum measurement periods in access points or base stations in a time division duplex (TDD) system where the super frame is divided into uplink and downlink portions for use in cognitive radio systems. | 01-24-2013 |
20120317465 | OFDM SYMBOL DIVERSITY COMBINER FOR BURST INTERFERENCE MITIGATION - The invention disclosed in this application describes a diversity combiner that operates as a maximal ratio combiner (MRC) when no interference is detected and as a selection combiner when OFDM symbol errors are detected with high probability. | 12-13-2012 |
20120317455 | SYMBOL ERROR DETECTION METHOD - The invention disclosed in this application describes an error detection method that can be used to identify an OFDM symbol that is interfered with. The method is based on computing a symbol by symbol path error metric from error correction code and by comparing the statistics of each individual symbol to the mean and the variance of the metric computed from the whole data packet. | 12-13-2012 |
20120314823 | COGNITIVE RECEIVER ARCHITECTURE - This invention describes a cognitive radio receiver architecture where multiple specialized receiver algorithms are executed in parallel. For example, maximal ratio combiner and beam forming algorithms may be running parallel. The receiver system computes solutions using different hypotheses of channel conditions and chooses the best result, i.e. is able to decode data from one of the parallel receivers. | 12-13-2012 |
20120314626 | CONCURRENT MULTI-BAND TRANSMITTER ARCHITECTURE - This invention describes a hardware and software architecture for concurrent dual-band or multi-band operation. More specifically this invention describes a multi-band cognitive radio network that allows terminals to efficiently use signal processing and RF resources by synchronizing the framing in multiple frequency bands. The invention is useful in TDMA systems by allowing efficient use of signal processing resources. | 12-13-2012 |
20120314560 | INTERFERENCE REJECTION METHOD BASED ON MULTIPLE SUB-BAND PROJECTIONS - This invention describes a cognitive radio signal processing where interference is mitigated using multiple frequency spatial projection to orthogonalize interference. The method is based on the well-known LMS solution of W=(A | 12-13-2012 |
20120087342 | METHOD TO SUPPORT RAPID INTER BASE STATION HANDOFFS IN IP BASED WIRELESS NETWORKS - A method that allows for rapid inter base station handoffs in IP based wireless networks is disclosed. More specifically a technique to address the problem of accurate location management during rapid handoff across multiple base stations is described in this invention disclosure. The idea proposed uses a combination of Timestamp and Sequence number along with a message exchange protocol over the network to maintain the registration with only a single base station at any point of time. | 04-12-2012 |
20120071161 | BAND MASKING OF SELF ORGANIZING CELLULAR NETWORKS - This invention addresses a method of whereby a cellular base station can scan the radio band to identify radio channels that are not in use, then claim those un-used radio channels for use to transmit and receive radio signals. A plurality of such radio base station could then comprise a cellular radio network, which channel planning and frequency re-use has become autonomous and self organizing. The present disclosure aims to further expand the utility and function of such self organizing cellular networks by including a user interface to the base station by which the operator can define the radio spectrum boundaries that the base station is authorized to operate within and to further set operational rules for the use of sub-sections of that defined spectral boundary. | 03-22-2012 |
20120069773 | SELF ORGANIZING CELLULAR NETWORKS - This invention addresses a method of scanning and self organization that is programmed into the base station which then will automatically avoid mutual interference and move the use of radio channels from one base station to another to move network capacity to where it is needed through a process called “abandonment. | 03-22-2012 |
20120019336 | Low loss RF transceiver combiner - A Radio Frequency (RF) splitter/combiner technique for splitting and combining RF signals using a combination of microstrip traces and coaxial cable for an N-port network is disclosed. | 01-26-2012 |
20110194490 | METHOD FOR TCP ACK CONTAINMENT IN UNIDIRECTIONAL FLOWS WITH CROSS LAYER OPTIMIZATION IN WIRELESS NETWORKS - A method that addresses a cross layer optimization technique for TCP in which the need to send ACK frames across wireless links is contained by using the information from the MAC layer acknowledgements is disclosed. More specifically the method significantly reduces bandwidth consumption and improves the performance of TCP on wireless networks. Furthermore, since the number of transmitted and received packets is reduced at the mobile device, the battery life of the device can be improved significantly. The proposed method can also be applied to downlink and uplink ACK frames with a slight variation between the two. | 08-11-2011 |
20110169711 | Antenna for cellular handset with user adjustable gain - This invention addresses a flip antenna design for mobile devices operating in ISM 900 MHz band. More specifically the present invention addresses the need to change the gain of a transceiver antenna (for mobile devices) with the flip of the antenna without changing any other characteristics of the transceiver. | 07-14-2011 |
20110013599 | Threshold-less mobile-driven handoff method for cellular systems using unlicensed spectrum - In wireless networks where multiple base stations are deployed, handsets may handoff from one base station to the other while in a voice call. In this disclosure a layer-2 hand-off mechanism for cellular systems designed to operate in unlicensed spectrum is described. More specifically a proposed method that does not use any pre-determined thresholds to initiate the hand-offs is disclosed. | 01-20-2011 |
20110003604 | Dynamic pattern elimination based compression method for text-based signaling protocols - This disclosure describes a dynamic pattern elimination compression method to eliminate redundant patterns, the content of which is not known a priori, by identifying the candidate dynamic patterns and marking them, then checking to see if there are any duplicate occurrences within the entire message by searching for markers, if a marker is found, checking to see if the pattern occurred before, if not, assigning a unique variable to the pattern, if so replacing the pattern with the variable that was assigned for this pattern, and if a pattern is found only once, removing the variable assigned to it. | 01-06-2011 |
20100189073 | Method for IP address management in networks using a proxy based approach in mobile IP telephony - A system and method for a mobile switching center to efficiently manage; assign; and reclaim the IP addresses is described. The procedure utilizes a mechanism that involves splitting the IP address assignment functionality into two parts, with the Base Station being responsible for assigning IP addresses to individual end user devices and the mobile switching center assigning a block of IP addresses to each Base Station and includes a methodology for the mobile switching center to efficiently manage; assign and reclaim the IP addresses. | 07-29-2010 |
20100151887 | Mobile handset proximity social networking - A system and method which allows for a more direct form of presenting useful information to a mobile handset user is disclosed. More specifically a method to facilitate social networking activated by the relative proximity of one mobile handset user to another that alerts mobile users when friends or co-workers are within a given proximity is disclosed. | 06-17-2010 |
20100150111 | System and method for adaptive proactive scanning to support fast handoffs in mobile networks - A scanning technique to select the best channel a mobile handset needs when approaching handoff is described. More specifically a system and method for an adaptive proactive scanning mechanism in which the rate of scanning is determined by the necessity to handoff and battery power is disclosed. | 06-17-2010 |
20100150095 | Network entry procedure in multi-channel mobile networks - A technique for network entry in multi-channel mobile systems is described. The procedure utilizes the channel specific information sent in the beacon of each channel to select a subset of suitable channels. It then proceeds to scan these channels to gather information on perceived interference and received signal strength. Based on collected information the device picks the most suitable channel for joining the network. Since the channels to be scanned are pre-selected based on information seen in the beacon, the overall scan latency is reduced, thereby leading to a faster and more successful network entry. | 06-17-2010 |
20100148954 | Mobile handset proximity location - A system and method which allows for a more direct form of presenting useful information to a mobile handset user is disclosed. More specifically a method to supply increased functionality to a mobile handset by adding a friend location function to mobile handsets, and to provide a location/homing function to mobile handsets when they are within a prescribed relative range of each other. | 06-17-2010 |
20100142501 | System and method for location services over wireless LANs - A system and method for location determination based on available information about the premises served by a Wireless Access Point is disclosed. More specifically, what is described is a method that enables the mobile terminal to deliver adequate and valuable location information to the service when proper function of the service requires this information. | 06-10-2010 |
20100135247 | System and method for base station assisted mobility detection for mobile handsets - In this disclosure a technique of base station assisted mobility detection of handsets is described. More specifically by transmitting the subnet ID in the Beacon, a base station simplifies the process of network detection. This also leads to a significant reduction in handoff latency by giving the handset ample time to prepare for the impending handoff. | 06-03-2010 |
20100124202 | RTP voice packets for base station hand-off in mobile IP telephony - In wireless networks where the goal is to support a large number of VOIP based cellular calls, large overhead headers in RTP voice packets are not acceptable. In wireless networks where multiple base stations are deployed, handsets may handoff from one base station to the other while in a voice call creating a large overhead. This disclosure describes an efficient way to extend a header compression algorithm and lower the overhead when the handset is in a voice call and hands off from one base station to another. | 05-20-2010 |
20100118838 | Heterogeneous back-off mechanism to decrease latency in mobile IP telephony - A heterogeneous back-off algorithm wherein latency-intolerant messages follow a linear back-off and other messages follow an exponential back-off protocol is disclosed. Typically exponential back-off techniques are used to schedule retransmissions to increase the probability of successful transmission in temporally high contention scenarios. However, exponential back-off can create an exponential increase in the transmit latency. For transmitting latency-intolerant messages like handoff messages large latency is not acceptable therefore a heterogeneous back-off algorithm using both back-off protocols is proposed. | 05-13-2010 |
20100091738 | Methodology for base station assisted channel selection for interference handling in mobile networks - A mechanism is disclosed where a Base Station provides assistance to a mobile device in the channel-switch process because a mobile device might have to perform frequent channel switches to overcome adverse channel conditions due to interference in the 900 MHz ISM band. The Base Station broadcasts channel-specific information that will be used by all mobile devices to accurately select prospective channels for future channel-switches, thereby cutting down the latency that is experienced during an actual switch. | 04-15-2010 |
20100074226 | Proxy based approach for IP address assignment to decrease latency of hand-offs in mobile IP telephony - A mechanism for decreasing the latency in an IP address assignment process for mobile systems using IP as network layer protocol is described. The proposed system is aimed at supporting seamless hand-offs for real-time applications like VOIP. A set of optimized messages is defined to eliminate the need for exchanging long DHCP messages to acquire an IP address. The mechanism involves splitting the IP address assignment functionality into two parts, with the base station being responsible for assigning IP addresses to individual end user devices, and the Mobile Switching Center assigning a block of IP addresses to each base station. | 03-25-2010 |
20100027714 | System and method for power saving coding in integer cycle or impulse type modulation transmissions - A system and method for substantially reducing average transmit power by omitting the transmission of a majority of pulses by using a modified run length coding to reduce signal power. By lowering the average power, an opportunity is presented to either decrease the total power drawn by the transmitter (battery life) or raise the peak power of all symbols (Eb/No), thereby increasing range of a RF transmission system. | 02-04-2010 |
20100014503 | Method for extending a heterogeneous MAC protocol to multi-channel systems - An extension to a heterogeneous MAC protocol that makes provisions for multi-frequency system architecture is described. A new frame structure for a multi-frequency xMAX system is introduced. Multi-frequency xMAX system is an extension of a single-channel xMAX system, where the available bandwidth is split into multiple channels to provide additional capacity and range. The new frame structure is followed by all channels and is designed to fulfill the requirements of multiple frequency operation. The new frame structure incorporates features that allow the handset to leverage the advantages of multiple frequency channels, especially in the event of interference. Also, a new mechanism to reduce the power consumption in the handset is discussed that significantly reduces the number of unnecessary receive operations at the handset. | 01-21-2010 |
20090316670 | Element-Based Method for Auto-Configuration of Handsets by a Base Station in a Heterogeneous Mac Protocol for Wireless Networks - An element-based method to automatically configure mobile handsets by the base station using a protocol that combines contention-free and contention-based MAC protocols for use in wireless VoIP systems with multiple base stations is disclosed. | 12-24-2009 |
20090310575 | Keep alive timeslots in a heterogeneous MAC protocol to track handsets in a wireless network - This disclosure describes a new keep alive timeslots based method to track registered handsets for a MAC protocol that combines contention-free and contention-based MAC protocols into a heterogeneous MAC protocol used for forwarding VoIP traffic in VoIP systems on wireless networks using multiple base stations thus allowing for transmission of high bit-rate data to multiple users over wired and wireless means. | 12-17-2009 |
20090310560 | Provisional hand-off mechanism in a heterogeneous mac protocol for wireless networks - This disclosure describes a provisional hand-off mechanism to transfer handsets between base stations for a MAC protocol that combines contention-free and contention-based MAC protocols for use in wireless VoIP systems with multiple base stations that reduces packet overhead thus allowing for transmission of high bit-rate data to multiple users over wired and wireless means. | 12-17-2009 |
20090268667 | Header compression mechanism for transmitting RTP packets over wireless links - This disclosure describes a new a header compression method for a MAC protocol that combines contention-free and contention-based MAC protocols into a heterogeneous MAC protocol used for forwarding VoIP traffic in VoIP systems on wireless networks using multiple base stations that reduces packet overhead thus allowing for transmission of high bit-rate data to multiple users over wired and wireless means. | 10-29-2009 |
20090257415 | Heterogeneous MAC protocol for multiple base stations in wireless networks - This disclosure describes a new interference avoidance Medium Access Control (MAC) protocol that combines contention-free and contention-based MAC protocols into a heterogeneous MAC protocol used for forwarding VoIP traffic in VoIP systems on wireless networks using multiple base stations which addresses additional interference elimination and the need to transport high bit-rate data to multiple users over wired and wireless means. | 10-15-2009 |
20090257414 | Heterogeneous MAC protocol for multiple base stations in wireless networks - This disclosure describes a new Medium Access Control (MAC) protocol that combines contention-free and contention-based MAC protocols into a heterogeneous MAC protocol used for forwarding VoIP traffic in VoIP systems on wireless networks using multiple base stations which addresses the need to transport high bit-rate data to multiple users over wired and wireless means. | 10-15-2009 |
20090245328 | Integer cycle frequency hopping modulation for the radio frequency transmission of high speed data - The invention disclosed in this application uses a method of modulation named Integer Cycle Frequency Hopping (ICFH) wherein a carrier signal, comprised of a continuum of sine waves is generated on a single frequency. A data bit representing either a “1” or a “0”, depending upon the logic polarity chosen by the builder is imposed upon the carrier signal by modifying the carrier signal at precisely the zero crossing point or the zero degree angle. The method of imposing the data is to cause either a lengthening or shortening of the proceeding 360 degrees of phase angle, thus effectively either raising or lowering the frequency of the carrier signal for just the one, or a succession of cycles at hand. Upon completion of the 360-degree cycle(s), the carrier will return to the original frequency. The main carrier frequency is only modulated beginning at the zero degree phase angle and ending at the 360-degree phase angle. In this modulation scheme as few as one sine wave cycle can be used to represent one data bit. The spectral output of a transmitting device using this modulation scheme will be defined by the difference in frequency between the main carrier signal and the modulating frequency. In the resulting signal a modulated segment of the main carrier frequency can represent either a binary “1” or a binary “0”. | 10-01-2009 |
20080280628 | Mobile handset information stream - A system and method which allows for a more direct form of presenting useful information to a mobile handset user is disclosed. More specifically a method to dedicate a transmission period of the MAC protocol when certain pre-formatted information is transmitted to all users on a network. | 11-13-2008 |
20080279175 | Off network mobile to mobile calling using SIP protocol - This invention addresses the need to transport high bit-rate data to multiple users, or between users, over wired and wireless means. Specifically, this disclosure describes a new method of enabling communication from mobile phone to mobile phone when no network services are available as long as radio contact between the mobile handsets is possible by reserving un-assigned timeslots in the medium access control protocol super frame structure. | 11-13-2008 |
20080226002 | System and method for broadband pulse detection among multiple interferers using a dynamic filter receiver - A system and method to detect broadband pulses in the presence of multiple strong narrow band interferers is disclosed whereby a dynamic filtering method is used to detect and notch out the interfering signal by forming notch filters at the precise location of the narrow band interferers. | 09-18-2008 |
20080225999 | System and method for broadband pulse detection among multiple interferers using a picket fence receiver - A system and method to detect broadband pulses in the presence of multiple arrow band interferers is disclosed whereby a picket fence filtering method is detect and ignore the signal at the precise location of the narrow band interferers. | 09-18-2008 |
20080205373 | Method to determine timeslot duration in a TDMA-based MAC protocol for VOIP over wireless - What is described is an approach to assigning timeslots of appropriate duration when using a TDMA based MAC protocol for forwarding VOIP traffic. It is known that a typical user speaks only 35% of the time in a voice session. Existing VOIP systems exploit this fact and reduce the amount of data generated by employing Voice Activity Detection (VAD) algorithms. The packets generated when a user is silent are shorter than the packets generated when a user is speaking. Hence there is a need to assign timeslots of different duration based on user speech activity. When the user is speaking we assign an Active Speech Timeslot (AST). When the user is listening a Silent Speech Timeslot (SST) that is long enough to transmit packets generated by a Comfort Noise Generator is assigned. | 08-28-2008 |