Abstract:
PROBLEM TO BE SOLVED: To shorten a hand-off time by a mobile unit always monitoring signal intensity of base stations, sorting signals in order of intensity and also aligning both frames of a desired control channel SCH and a traffic channel TCH. SOLUTION: In normal communication start, a control circuit 203 of a mobile unit monitors a list of control channel frequencies that are received by a receiver 227, measures the signal intensity of an allocation BA frequency and sorts signals in order of intensity. Next, when traffic channel TCH frames and desired control channel SCH frames are aligned, a base station identification code BSIC is decoded. When they are not aligned, they are aligned with the next SCH frames, a bit error rate or frame error rate of a receiving signal is monitored and increased, a voice is suspended when communication is suspended, the code BSIC of a cell of the highest signal intensity is decoded, and hand-off is requested and executed.
Abstract:
PROBLEM TO BE SOLVED: To provide a signal transmission scheme for reducing the omission of a call in a radio mobile network. SOLUTION: To attempt to recover a voice call which may drop off, a relief channel function supports use of previously allocated radio resources of an adjacent BS. Upon detecting loss of frames in a sequential direction from the network, an MS puts its transmitter into a disabling state. Upon receiving transmission loss from the MS once, the transmitting source BS executes addition of a soft hand-off to a relief cell in an adjacent BS, thereby attempting re-establishment of a communication with the MS. The adjacent BS is selected on the basis of a list of adjacent stations of the MS, the latest report of an expansion pilot strength measurement message(EPSMM) or, in another case, another factor. COPYRIGHT: (C)2003,JPO
Abstract:
Systems, methods and apparatus are provided for scheduling resources in Orthogonal Frequency-Division Multiple Access (OFDMA) communication networks for "direct link" or peer-to-peer communications among stations operating therein so that OFDMA resources can be allocated to a transmitter station for a peer-to-peer communication session with a receiver station such that near-far issues caused by peer-to-peer communication are reduced/avoided. The disclosed technologies can prevent peer-to-peer communication links using different sub-channels within the same time slot from creating near-far issues for other receiver stations that are within communication range.
Abstract:
Systems, methods and apparatus are provided for scheduling resources in Orthogonal Frequency-Division Multiple Access (OFDMA) communication networks for "direct link" or peer-to-peer communications among stations operating therein so that OFDMA resources can be allocated to a transmitter station for a peer-to-peer communication session with a receiver station such that near-far issues caused by peer-to-peer communication are reduced/avoided. The disclosed technologies can prevent peer-to-peer communication links using different sub-channels within the same time slot from creating near-far issues for other receiver stations that are within communication range.
Abstract:
A method is provided which enables the connection of nodes out of communication range while minimizing the energy consumption in standby nodes. Specifically, the present invention provides a method to control the wake up rate of standby nodes in a multi-hop communication system. An access point collects, processes, and refines statistical information regarding one or more system parameters; determines a wake up rate based on the statistical information and one or more historical information; and transmits the wake up rate to nodes in its coverage area. A node receives the wake up rate; and periodically changes from a sleep state to a wake up state at the wake up rate to support routing functions for providing multi-hop communication to the one or more access points.
Abstract:
At a two-way communications apparatus (200) of choice, one can detect (101) a two-way communications apparatus user instruction and then, in response to detecting that instruction, provide (102) certain information to a nearby two-way communications apparatus (208) via a near field communications link (206). This information can comprise, at least in part, a biometric template as pertains to a user of the two-way communications apparatus and a privacy policy as pertains to further dissemination of the biometric template.
Abstract:
A cellular radiotelephone system provides service to remote units having a voice operated transmitter (VOX) (230). If the regularly scheduled periodic signal quality measurements made by fixed site equipment (210, 220, 230, 240, 250) indicate that the remote unit signal has not been received for a predetermined number of measurements, an audit request is transmitted to the remote unit. The remote unit responsively keys its transmitter for a period of time. A first special scan (24) is programmed into the regular process such that the fixed site equipment (210, 220, 230, 240, 250) may continue with its regular process until the signal quality measurement must be made. A second measurement is made following the first and if the two signal quality measurements made while the VOX remote unit is known to be transmitting agree, system reconfiguration for the service of this remote unit may be implemented by the cellular system.
Abstract:
Remote units within a first communication system ( 121 ) utilizes frequencies (channels) from a second communication system ( 120 ) when placing a call. When a first remote unit ( 106 ) wants to call a second remote unit ( 107 ) using the channels, the first remote unit sends a base station ( 103 ) a list of top N traffic channel blocks from the second communication system along with the identity of the second remote unit. The base station then pages the second remote unit using a signaling channel reserved by second system. The second remote unit responds to the page with its list of best traffic channel blocks/chunks. The base station then picks the best overlap of idle channels from the list received by the remote units, and sends the list to the remote units instructing them use those traffic channels. Once the remote units receive the available channels, they can begin their call.
Abstract:
A smart card (100) is equipped with an internal time-of-day clock and calendar (106). Between the smart card (100) and a subscriber unit (209, 300), into which it is inserted, there is a communication of the subscriber's identity and a negotiated agreement for how long the subscriber unit (209, 300) is to maintain the transferred identity. For that duration of time, the subscriber unit (209, 300) is enabled with the subscriber's identity, and the smart card is essentially 'dumb', and therefore unusable until that duration has elapsed.
Abstract:
A registration from a subscriber is delivered to the cellular network via an ad hoc network. Based on registration information, several return paths are prepared for delivery of a page from the cellular network to the subscriber regardless of the initial or final coverage state of the subscriber and regardless of the final coverage or operational state of its assigned relays.