摘要:
A personal communication system (100) having power control provided by a radio port control unit (122), provides for portable radio controlled optimum base station selection. Multiple base stations 102, 124, and 130 transmit channel signals including a code word which indicates the transmit power level of each transmission. A portable radio 120 measures the received signal strength (RSS) of each of the channel signals transmitted from the base stations and also receives the coded power levels of each transmission. The portable (120) then calculates an adjusted received signal strength (ARSS) value for different channels from different base stations. The portable (120) then compares the ARSS values to determine the optimum base station to communicate with for portable controlled handover, local registration, and link set up.
摘要:
A method and apparatus whereby a communication unit (10) transmits a communication channel request and the nearest base site (12) makes the communication channel grant or allocation. A base site receives the channel request signal, measures the received signal strength (RSSI) level of the received signal, and if that level is above a threshold level, a communication channel is allocated to the requesting communication unit, thus establishing a communication link. If the channel request signal does not have an RSSI level above the threshold, the base site delays the grant of a communication channel for a period inversely proportional to the measured RSSI level to allow other base sites the opportunity to grant a communication channel to the requesting communication unit. If the base site determines that another base site has granted a communication channel to the requesting communication unit, the allocation process is stopped, and the base site continues scanning for channel request signals.
摘要:
A radio telephone communication system (200) having a base station (203) including at least one frequency agile time division duplex transceiver (207) for facilitating communication with at lest one radio telephone (100) on the at least one radio frequency channel. The radio telephone (100) scans a plurality of channels capable of being generated by the at least one frequency agile transceiver (207) to find an available channel and provide an indication representing a base station busy status when all the at least one frequency agile transceivers are in use. A base station busy status is indicated when one of a bidirectional time division duplex communication including a base station identification signal is being communicated by the at least one frequency agile transceiver or a unidirectional time division duplex communication including a base station identification signal is being communicated by the at least one frequency agile transceiver (207).
摘要:
A radio telephone communication system (200) comprising a base station with at least one frequency agile transceiver (207) capable of time division duplex operation on at least one radio frequency channel. The base station operates to facilitate communication with at least one radio telephone (100) on the at least one radio frequency channel. The radio telephone communication system further comprises a radio telephone (100) capable of determining an acquisition status of the at least one frequency agile transceiver in the base station, the radio telephone (100) generating an indication representing a base station busy status (402) when one of: requesting a time division duplex communication link fails and bidirectional time division duplex communication is exists on the radio frequency channel; and requesting a time division duplex communication link fails and unidirectional time division duplex communication exists on the radio frequency channel and the unidirectional time division duplex communication originates from the base station.
摘要:
A system and method for achieving wireless local area network (WLAN) communications between an access point and a mobile device are disclosed. In at least some embodiments, the system involves an access point that includes a first transceiver capable of sending and receiving first wireless communication signals in accordance with a WLAN protocol, and a first transmitter capable of sending second wireless communication signals that are cellular/WAN communication signals on a first channel. The second wireless communication signals can be received by a mobile, dual-mode (or multi-mode) wireless communication device such as a cellular telephone and, upon such receipt, WLAN communications can be established and conducted between the access point (or another access point) and the mobile device.
摘要:
A system (100) and method (400) for mesh/ad hoc participation is provided. The method 400 can include compensating a first service provider (510) for allowing a device (539) of a second service provider (530) to operate in an ad hoc network (500) operated by the first service provider, and determining network resources utilized for providing communication among nodes in the ad hoc network. The compensation to the first service provider accounts for network resources utilized by the device for communicating within the ad hoc network. Resources can include equipment that is operated, owned, leased, rented, borrowed, or shared by the service provider. The method 400 allows users to roam to other networks without a service subscription agreement.
摘要:
A method and apparatus is used for transmitting an outbound message in a two-way messaging system having a plurality of cells employing frequency reuse. The outbound message is transmitted to a selective call transceiver (122) utilizing a first frequency reuse plan (312). The two-way messaging system awaits a positive acknowledgment (316, 318) from the selective call transceiver (122) confirming that the outbound message was received with an acceptable quality. The two-way messaging system retransmits the outbound message to the selective call transceiver (122) utilizing a second frequency reuse plan (332), in response to receiving a negative acknowledgment and also in response to failing to receive any acknowledgment within a predetermined time after transmitting the outbound message.
摘要:
A method and apparatus completes inbound calls for portable communication units (120) in a wireless communication system comprising portable communication units (120) and fixed communication units (102). The fixed communication unit (102) provides wireless communications over a limited coverage area (108, 110, 112) and provides coupling to a telephone system (114). The fixed communication unit (102) has at least one wireless transmission channel carrying call set-up signaling in a first mode and user communications in a second mode. The method includes in the fixed communication unit (102) the step of generating (708) more than one sequence of periodic call set-up polls on a wireless transmission channel for polling a portable communication unit (120) having an inbound call. The sequence coexists with other sequences of periodic call set-up polls being generated concurrently on the same wireless transmission channel.
摘要:
A communication system 100 for determining the optimum direction (206) for transmitting and receiving a signal in a radio comprises a receiver for receiving a carrier signal being a time divided signal having an instruction signal, a transmitter for transmitting a time divided signal, a directional antenna (10) coupled to said receiver and transmitter, and a steering device (28) for changing the phase of the carrier signal in accordance with the instruction signal.
摘要:
A TDMA communication system (100) comprises a two-way subscriber unit (112') and at least two base stations (104b and 104c). The subscriber unit monitors the strengths of signals (114') received from the base stations. As the subscriber unit roams within the area serviced by the communication system, the received signal strength will vary as the subscriber unit moves nearer to or farther from the base station that is transmitting the call. When the subscriber unit moves out of the range of the base station, the subscriber unit determines, based on certain predetermined criteria, with which base station to communicate.