Patent application number | Description | Published |
20080273506 | Adaptive Beamforming Configuration Methods And Apparatus For Wireless Access Points Serving As Handoff Indication Mechanisms In Wireless Local Area Networks - Methods and apparatus for use in configuring a wireless access point (AP) which serves as a handoff indication mechanism (“AP tripwire”) in a wireless local area network (WLAN) for mobile device handoffs between the WLAN and a wireless wide area network (WWAN) are described. During a configuration procedure or training mode of operation of the wireless AP, radio frequency (RF) signals transmitted from a plurality of communication devices are received at the wireless AP. The plurality of communication devices include a first group of communication devices positioned at locations of undesired RF coverage of the wireless AP, outside of an RF coverage boundary of a WLAN coverage region of one or more other wireless APs of the WLAN. The plurality of communication devices also include a second group of communication devices positioned at locations of desired RF coverage of the wireless AP, around the RF coverage boundary of the WLAN coverage region and within the WWAN coverage region. Wireless transceiver parameters of the wireless AP are automatically determined and set to adjust boundaries of an RF coverage region, such that RF signal coverage of the first group of communication devices is minimized but RF signal coverage of the second group of communication devices is maximized. Preferably, the parameters of the wireless transceiver are determined through use of an adaptive beamforming technique (e.g. a minimax optimization) which is performed automatically by the wireless AP without user intervention. After the configuration procedure, the wireless AP operates with use of the configured wireless transceiver parameters in a normal, steady-state mode of operation as the AP tripwire of the WLAN. | 11-06-2008 |
20100003988 | METHOD AND SYSTEM FOR WIRELESS CHANNEL SELECTION BY A MOBILE DEVICE - A method and mobile device for performing wireless channel selection that employs more than one concurrent level 2 interface to facilitate a level 3 handoff. The method and device maintain an active service over a first level 3 connection through a first transceiver, establish a second level 3 connection through a second transceiver, and then switch the service over to the second connection. To establish an appropriate level 3 connection, the mobile device may evaluate candidate channels against criteria associated with the active service to ensure quality of service can be maintained over the new connection or may adapt the active service to a candidate channel. | 01-07-2010 |
20100041345 | Method of Controlling a Plurality of Internal Antennas in a Mobile Communication Device - In one embodiment, a mobile communication device comprises a plurality of antennas, the antennas operable in at least one frequency band, is operable to automatically optimize the best antenna or antenna combination in reaction to the mobile communication device's immediate environment. The antennas are disposed substantially coplanar and have varying degrees of polarity. The mobile communication device further comprises logic structure for determining which of the antennas are optimal for operation of the mobile communication device and logic structure for selecting the optimal antenna for operation of the mobile communication device. | 02-18-2010 |
20100135184 | Adaptive Beamforming Configuration Methods And Apparatus For Wireless Access Points Serving As Handoff Indication Mechanisms In Wireless Local Area Networks - In one illustrative example, a wireless access point of a wireless local area network (WLAN) includes an antenna array, a wireless transceiver array coupled to the antenna array, and one or more processors which are coupled to the wireless transceiver array. The one or more processors are adapted to operate the wireless access point in a configuration mode and a handoff indication mode. In the configuration mode, the one or more processors are adapted to operate the wireless access point to receive, via the wireless transceiver array, RF signals from one or more communication devices and determine and set wireless transceiver parameters for adjusting boundaries of an RF coverage region of the wireless access point based on these RF signals. In the handoff indication mode, the one or more processors set the wireless access point with the adjusted RF coverage region (adjusted from the configuration mode), where handoff indications are communicated in response to mobile devices leaving the WLAN coverage region through the adjusted RF coverage region for handoff to a wireless wide area network (WWAN). | 06-03-2010 |
20100265917 | APPARATUS, AND AN ASSOCIATED METHOD, FOR PRESERVING COMMUNICATION SERVICE QUALITY LEVELS DURING HAND-OFF OF COMMUNICATIONS IN A RADIO COMMUNICATION SYSTEM - A mobile station is configured to transmit a sequence of data packets over a wireless network. The station includes a data sequence expander. The expander receives an indication of a pending hand-off for the mobile station from a first network access point to a second network access point and estimates an amount of time prior to occurrence of the hand-off. The expander inserts a number of delay packets into the sequence of data packets in response to receiving the indication of the pending hand-off. The number of delay packets is determined based on the estimated amount of time prior to the occurrence of the hand-off such that the insertion of the delay packets into the sequence of data packets will cause a delay that corresponds to the amount of time prior to occurrence of the hand-off. | 10-21-2010 |
20110044289 | VOICE SYNCHRONIZATION DURING CALL HANDOFF - A method, mobile electronic device and system for synchronizing hand-off of a voice media session between a WAN/cellular network and a WLAN network. When a hand-off occurs, the connection with both networks is temporarily maintained and the voice data on both connections compared to determine differences in the delays experienced over both connections. The timing of one or both voice streams is adjusted to synchronize the voice streams, and then the handoff is completed. | 02-24-2011 |
20110188475 | APPARATUS, AND AN ASSOCIATED METHOD, FOR PRESERVING COMMUNICATION SERVICE QUALITY LEVELS DURING HAND-OFF OF COMMUNICATIONS IN A RADIO COMMUNICATION SYSTEM - A mobile station is configured to transmit a sequence of data packets over a wireless network. The station includes a data sequence expander. The expander receives an indication of a pending hand-off for the mobile station from a first network access point to a second network access point and estimates an amount of time prior to occurrence of the hand-off. The expander inserts a number of delay packets into the sequence of data packets in response to receiving the indication of the pending hand-off. The number of delay packets is determined based on the estimated amount of time prior to the occurrence of the hand-off such that the insertion of the delay packets into the sequence of data packets will cause a delay that corresponds to the amount of time prior to occurrence of the hand-off. | 08-04-2011 |
20110243118 | Conferencing PSTN Gateway Methods And Apparatus To Facilitate Heterogeneous Wireless Network Handovers For Mobile Communication Devices - Techniques for use in a network processing component is for initially establishing, via a gateway, a voice call between a mobile device which operates in a wireless network and a destination device. A first connection leg of the voice call is to be established between the mobile device and a conference room of the gateway. The technique involves sending to the gateway a request message for establishing a second connection leg between the network processing component and the destination device, and then subsequently sending to the gateway a re-routing message for re-routing the second connection leg from the network processing component to the conference room. This causes a voice call having the first and the second connection legs to be initially established between the mobile device and the destination device via the gateway. | 10-06-2011 |
20120076053 | Call Forwarding Methods And Apparatus For Mobile Communication Devices Which Operate In WWANS And WLANS - A mobile device operates in a WLAN for VoIP communications, which includes registering with registrar server functionality of a SIP proxy server with a SIP identity which is further communicated to a location server. In response to an incoming voice call from a caller via a telephone network, the mobile device receives an INVITE request which is issued from a gateway and forwarded from the SIP proxy server. The mobile device sends a response to the SIP proxy server which is communicated to the caller via the gateway. When switching from the WLAN to the cellular network, the mobile device sends via the WLAN to the location server a message for forwarding voice calls directed to the SIP identity to the telephone number. The mobile device also sends via the cellular network a message for canceling the forwarding of voice calls directed to telephone number to the SIP identity. | 03-29-2012 |
20120142282 | Method of Controlling a Plurality of Internal Antennas in a Mobile Communication Device - In one embodiment, a mobile communication device comprises a first antenna; a second antenna; and a controller, based on a detected obstruction, for selecting one of said first antenna or said second antenna. | 06-07-2012 |
20120233672 | Provisioning Methods And Apparatus For Wireless Local Area Networks (WLANS) With Use Of A Provisioning ESSID - A wireless network has a primary network which provides one or more communication services and a provisioning network which provides a provisioning service but disallows the one or more communication services. A mobile device associates with an access point of the wireless network by sending a request which includes a first set service identifier (SSID) for accessing and operating in the provisioning network. If an authentication procedure is successful, the device receives via the access point a second SSID in a provisioning procedure with the provisioning network, and programs the second SSID in a network list. The device subsequently associates with the access point by sending a request which includes the second SSID from the network list instead of the first SSID, for accessing and operating in the primary network for the one or more communication services. | 09-13-2012 |
20120258759 | METHOD AND SYSTEM FOR ADJUSTING WLAN RADIO RECEIVER GAIN IN A WIRELESS DEVICE - A method for adjusting a gain level for a receiver of a first radio simultaneously operational with a transmitter of a second radio, comprising: determining a signal-to-noise ratio (“SNR”) value for signals received by the receiver from an access point (“AP”); and, when the first radio is associated with the AP and the transmitter is not transmitting, if the SNR value exceeds a SNR threshold, reducing the gain level for the receiver from an initial level and initiating transmission from the transmitter, otherwise maintaining the gain level for the receiver at the initial level and initiating transmission from the transmitter; wherein the SNR threshold is a SNR value above which beacon signals from the AP can be successfully received by the receiver. | 10-11-2012 |
20120300678 | Conferencing PSTN Gateway Methods And Apparatus To Facilitate Heterogeneous Wireless Network Handovers For Mobile Communication Devices - For initially establishing a voice call, a first connection leg for the voice call is established between a mobile device operating in a wireless network and a conference room of a conferencing gateway. A second connection leg is established via the conferencing gateway between a processor and a communication device connected in a telephone network. Subsequently, the processor sends a message to the conferencing gateway for transferring the second connection leg from between the processor and the communication device to the conference room and the communication device, for initially establishing the voice call. The conference gateway is configured to combine media streams of connection legs of the voice call. | 11-29-2012 |
20130010778 | METHOD AND SYSTEM FOR PREDICTING SERVICE DROP IN A WIRELESS NETWORK - A mobile wireless device for use in a wireless network, wherein the wireless network includes regular access points and border access points. The border access points are those access points situated at the edge of the campus or other physical facility associated with the wireless network and they define the edge of the coverage area of the wireless network. The mobile wireless device predicts a possible drop of an active service due to loss of coverage by recognizing when it has connected with a border access point. A warning is output to the user of the mobile wireless device. The mobile wireless device may further recognize if it is located on the exterior side of the border access point away from the interior of the wireless network. | 01-10-2013 |
20130051281 | CALL FORWARDING METHODS AND APPARATUS FOR MOBILE COMMUNICATION DEVICES WHICH OPERATE IN WWANS AND WLANS - A mobile device has a telephone number for calling the mobile device in a cellular network, and a SIP identity for calling the mobile device in the WLAN. The mobile device operates in the WLAN to receive voice call services, where voice calls directed to the telephone number are call forwarded to the SIP identity. Subsequently, the mobile device operates in the cellular network to receive the voice call services. The mobile device sends, via the cellular network, a message for cancelling the call forwarding of voice calls. The mobile device also sends, via a data communication service of the cellular network, a message for call forwarding voice calls directed to the SIP identity of the mobile device to the telephone number of the mobile device operating in the cellular network. | 02-28-2013 |