Abstract: A method is disclosed for determining a connectivity status of radios in a coverage group. Each coverage group includes radios configured to transmit and receive range messages on a channel and a timeslot. Each radio in the coverage group is configured to generate a range message and to transmit the range message to each other radio in the coverage group. Each radio in the coverage group is also configured to receive, from each other radio in the coverage group, a range message generated by each other radio. Based on the range message received from each other radio, each radio is configured to determine bi-directional connectivity between the receiving radio and the radios that sent the D-ARTS messages. The determined bi-directional connectivity status is between each radio and each of at least two other radios in the coverage group.

Abstract: A method and apparatus for confirming delivery of group data to a plurality of radio communication devices in a wireless communication system. The wireless communication system includes a plurality of radio communication devices in communication with a sender. In operation, the sender sends group data to the plurality of radio communication devices and further determines a call hang time sufficient to contain a dedicated acknowledgment slot for each of the plurality of radio communication devices. The sender reserves an acknowledgment slot in the determined call hang time for each radio communication device and further sends an acknowledgment polling signal to each radio communication device, where the acknowledgment polling signal identifies the respective acknowledgment slot that is reserved for each radio communication device to acknowledge receipt of the group data. The sender accordingly receives an acknowledgment from the radio communication devices during its respective reserved acknowledgment slot.

Abstract: A dynamic call based user ID allows subscriber units to be shared amongst a plurality of users or used for a plurality of roles/uses. A voiced call sign is transmitted by a calling subscriber unit to a targeted subscriber unit. A pattern in the voice transmission of the calling unit is detected, and the voiced call sign is compared to a list of pre-stored call signs. When a match between stored calls signs and the current call sign occurs, the calling subscriber unit saves the current call sign. Fixed network equipment (FNE) then associates the saved current call sign with a subscriber unit ID (SUID) of the calling unit. The dynamic association between the call sign and the SUID allows the subscriber unit to be shared amongst different users and for different uses/roles.

Abstract: Disclosed are methods and systems for controlling network selection between a current wireless network and a higher-priority wireless network. A subscriber station determines, while connected to a current wireless network, whether it is within a coverage area of a higher-priority wireless network and whether a current traffic data load is indicative of lower-priority background traffic or higher-priority foreground traffic. Responsive to determining that it is within the coverage area of the higher-priority wireless network and that the current traffic data load is indicative of lower-priority background traffic, the subscriber station halts at least the lower-priority background traffic for a predetermined amount of time sufficient to effect a release of a radio resource control (RRC) connection with the current wireless network and searches for and connects to the higher-priority wireless network.

Abstract: A client device performs a method for priority scanning of groups across multiple disparate connected networks which includes the client device creating a scan list having a designated priority group in response to user input that monitors the activity of a plurality of communication groups on a first wireless network that has a one-to-one mapping to a second plurality of logically equivalent communication groups provisioned on the multiple wireless networks. The client device also receives an indication from a communication server that a group on the scan list is active and automatically and preemptively joins the active group using resources on the first wireless network.

Abstract: A method for synchronizing the direct mode TDMA transmission of a set of radios by following a selected radio as the leader includes: receiving, by a radio, a communication from an other radio; identifying, by the radio, a leader according to a leadership election rule using the received communication from the other radio and a current leader information; setting, by the radio, the identified leader as its leader; and synchronizing, by the radio, a time slot boundary with a time slot boundary defined by the leader.

Abstract: A method and device for distributing public key infrastructure (PKI) certificate path data enables relying nodes to efficiently authenticate other nodes in an autonomous ad-hoc network. The method includes compiling, at a certificate path management unit (CPMU), the PKI certificate path data (step 405). One or more available certificate paths are then determined at the CPMU for at least one relying node (step 410). Next, the PKI certificate path data are distributed by transmitting a certificate path data message from the CPMU to the at least one relying node (step 415). The certificate path data message includes information identifying one or more trusted certification authorities associated with the one or more available certificate paths.

Abstract: A radio frequency (RF) amplifier structure provides highly efficient RF signal amplification across a wide bandwidth, when implemented in both inverting and non-inverting Doherty designs, by employing matching impedance transform circuits that comprise a low pass multiple section inductance-capacitance circuit and that provides impedance matching between the output of an amplifier device and a power combiner, wherein the output matching impedance transform circuit has approximately an odd multiple of 90 electrical degrees over the RF amplifier structure's frequency range of operation, and adjustable phase delay circuits that route an amplified RF signal to the power combiner and that are controllably adjusted based on a frequency of an RF input signal over an operating frequency range of the RF amplifier structure.

Abstract: Generally speaking, pursuant to the various embodiments, pre-allocation of resources in a RAN of a communication system is performed. A system element having an application function determines, for a set of user equipment (UE), pre-allocation information used to select a set of cells in the RAN to which the set of UE will connect for exchanging data. The element sends a request to establish a bearer to an evolved packet core (EPC), wherein the request includes the pre-allocation information. The determining and sending actions are performed prior to one or more of the UE in the set of UE connecting to the set of cells. The EPC processes the request and returns a response to the system element, which identifies that a bearer for unicast and/or group communications has been established.

Abstract: A method for controlling peak-to-average power ratio prior to amplification by a power amplifier is provided. The peak sample of a signal is predicted, window length is adjusted based on the peak width around the peak sample or subcarriers used to transmit the signal, and the window is subsequently used to clip the samples. A peak suppression window may be applied prior to predicting the peak sample when a set number of samples exceed a predetermined threshold. Window clipping may be deactivated if interference and throughput of the power amplifier is detrimentally affected. A pulse shaping filter may be optimized based on the window clipping to control transmitted signal characteristics. Various thresholds used in the prediction may be initially based on system design and power amplifier linearity and then dynamically adjusted based on an estimation of active subcarriers or of interferers present in the communication system.

Abstract: Mode steering in a wireless communication network includes configuring a list of neighboring access points and their operational modes. If an operational mode of a requesting mobile device can not be supported by the access point, denying the association. If an operational mode of a requesting mobile device matches a highest operational mode of the access point, allowing the association. If the operational mode of the mobile device is not the same as the highest operational mode of the access point, and if any neighboring access point has an available operational mode matching that of the mobile device, denying the association, so as to steer the requesting mobile device to the matching neighboring access point.

Abstract: A method and apparatus for extending a virtual channel of a communication area to a user equipment is disclosed. A message including a virtual channel identity and an area identity from the user equipment is received at a call controller. The call controller determines that the virtual channel identity is associated with a communication area and the area identity is associated with an area outside the communication area. The call controller then determines whether a virtual channel extension feature is enabled on the user equipment, and if so, receives data from the user equipment and then distributes the data on the virtual channel.

Abstract: A device and method determines a command from a touch input. The method includes determining an application-in-use data indicative of an application being executed. The method includes receiving, by a touch sensitive input device, a touch input data including at least one of a finger use input data, a force input data, a gesture input data, and a location input data. The finger use input data relates to how the touch input data is entered. The force input data relates to a pressure applied in the touch input data. The gesture input data relates to a motion of the touch input data over time. The location input data relates to a position on the input device. The method includes determining a command based on the application-in-use data and at least one of the finger use input data, the force input data, the gesture input data, and the location input data.

Abstract: A communication system (100) provides collaboration between narrowband communication devices (102) and broadband communication devices (104) operating over different networks. The communication devices (102, 104) are linked to provide peer-to-peer communication that supports the dissemination of public safety information to a public safety personnel user utilizing the devices. Applications within the devices (102, 104) automatically control features amongst the plurality of devices for redundancy of critical information, removal of non-critical information and power management. Context information can also be examined and shared between amongst the devices.

Abstract: An antenna (100) having an antenna structure is provided. The antenna structure is formed of a rolled conductive strip having a first section (112) with overlap between successive turns and a second section (114) with no overlap between successive turns. The first section (112) has an insulating layer to prevent shorts between the successive overlapping turns. The antenna (100) provides multi-band capability.

Abstract: An apparatus and method of providing accurate and consistent open spectrum results for secondary devices from different geo-location databases is presented. The results, which may be independently derived by each database, are independent of the database queried. The comparison permits some amount of latitude in spatial and temporal consistency between the databases as errors are only indicated if the temporal or spatial discrepancies are pervasive. In addition, large percentages of different locations showing discrepancies when compared also lead to corrective action being taken. Corrective actions that may be taken include forcing problematic databases to update, shunting requests by secondary devices in the problematic locations to acceptable databases or shutting down the problematic databases entirely.

Abstract: Methods for enabling floor control are performed in an endpoint terminal (140, 142, 146) and a session controller (106). The session controller: receives (410) a message requesting a session that includes an SDP packet with a requested floor control profile having a requested set of floor control parameters or a requested list of potential floor owners; accepts (410) the session; determines (420) a final floor control profile having a final set of floor control parameters and a final list of potential floor owners; and communicates at least a portion of the floor control profile within a system (100). The endpoint terminal: communicates a message requesting a session that includes an SDP packet with a requested floor control profile; and receives a message having an SDP packet with a final floor control parameter. The final floor control profile may be the same as or different from the requested floor control profile.

Abstract: A node in a wireless communication system announces a channel switch operation to facilitate a smooth transition to other channel. The node detects a requirement to discontinue communications at a first channel and sends a message to a plurality of neighboring nodes in response to detecting the requirement. Generally, the message comprises at least a reason for discontinuation of communications at the first channel and a duration for the channel switch operation after which the node is available for communications at the first channel or an alternate channel. Each of the plurality of neighboring nodes can determine based on the message and the neighborhood conditions a requirement to scan alternate channels to initiate communications with other nodes.

Abstract: An antenna system includes a multi-port antenna with an active feeding network coupled thereto. The active feeding network applies complex weights to signals received from and transmitted to each port of the multi-port antenna. The complex weights are applied according to eigenvectors corresponding to a Hermitian matrix representation of the multi-port antenna. The Hermitian matrix may be based on such multi-port antenna parameters such as power dissipation, power radiation, real-power flow, volumetric storage of electromagnetic energy, and/or volumetric dissipation of electromagnetic energy. The multi-port antenna yields orthogonal electromagnetic fields in volumes or surfaces of interest in response to the active feeding network excitation.

Abstract: A linear RF transmitter (100) includes a forward path including a baseband signal combiner (109) and an RF (radio frequency) power amplifier (123), and a linearizing control loop from an output (127) of the RF power amplifier to an input of the combiner (109). A feedback control path (105, 107) of the loop delivers a baseband error control signal to the combiner. The transmitter further includes a test signal generator (102) to apply to the combiner in a closed loop level training mode a test signal comprising a voltage Vin which increases with time in a non-linear manner approaching an asymptotic limit such that in response an output signal produced by the combiner is a voltage Ve which is substantially constant over a period of time.