Abstract: A wireless terminal using OFDM signaling supporting both terrestrial and satellite base station connectivity operates using conventional access probe signaling in a first mode of operation to establish a timing synchronized wireless link with a terrestrial base station. In a second mode of operation, used to establish a timing synchronized wireless link with a satellite base station, a slightly modified access protocol is employed. The round trip signaling time and timing ambiguity between a wireless terminal and a satellite base station is substantially greater than with a terrestrial base station. The modified access protocol uses coding of access probe signals to uniquely identify a superslot index within a beaconslot. The modified protocol uses multiple access probes with different timing offsets to further resolve timing ambiguity and allows the satellite base station access monitoring interval to remain small in duration.

Abstract: Systems and methods for transmitting and receiving additional data, such as video data, over legacy satellite digital audio radio signals are provided. In exemplary embodiments, hierarchical modulation can be used to transmit secondary information over a legacy signal. For example, the Sirius Satellite Digital Audio Radio Service (“SDARS”) system may use a second layer of modulation to transmit video data on top of its regular audio signal. In order to support such future services within the original system design, sometimes referred to herein as a “legacy” system, additional information bandwidth can be acquired, for example, by using hierarchical modulation to overlay data for such new services on top of the legacy transmission. In such a system, for example, overlay data can be transmitted by applying a programmable angular offset to legacy QPSK symbols, for forming a new constellation similar to 8PSK.

Abstract: Provided is a wireless mobile communication system in which a mobile station reports a headroom value indicating the magnitude of currently used transmission power and additionally usable transmission power. An uplink scheduling method of a Base Transceiver Station (BTS) includes normalizing the headroom value according to a pre-set reference transmission format; determining a mean data rate of the mobile station; and determining a priority of the mobile station considering the normalized headroom value and the mean data rate.

Abstract: A method and system for determining delays between a primary site and a diverse site in a satellite communication system includes uplinking signal from the primary site and the diverse site. A controller determines a switchover processing time, a communication time between the primary site and the diverse site and a gap time to establish a gap at the receiving device. The controller changes uplinking from the primary site to the diverse site in response to the switchover processing time, the communication time and the gap time.

Abstract: A method of operation for wireless transmission of data to one or more destination devices across a network that includes a plurality of access points disposed about a building, each access point having a first transmission range of maximum bandwidth and a second transmission range of signal interference, the access points being arranged in a topology wherein each access point is spaced-apart from a nearest neighboring access point by a first distance less than the first transmission range. The data is transmitted by a first access point; then it is repeated by a series of additional access points that extends across the topology. Re-transmission of the data occurs in a manner wherein any pair of access points transmitting on the same channel is separated by a distance greater than the second transmission range.

Abstract: A network for wireless transmission of a media data in a building includes a plurality of access points. A first access point receives the media data from a source and transmits the media data downstream at a first data rate. A plurality of additional access points is distributed about the building, each of which includes an upstream transceiver to receive the media content on a first channel and a downstream transceiver to re-transmit the media content at substantially the first data rate on a second channel. It is emphasized that this abstract is provided to comply with the rules requiring an abstract that will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims.

Abstract: Methods, systems, and protocols are described for securing data in transit over networks. A communication session is initiated between a client and a server. One or more communication channels can be set up between the client and the server. Each established communication channel may have zero or more intermediary nodes that are selected by the client or by the server to process information exchanged between the client and the server via the communication channels.

Abstract: Cooperative scheduling of master and slave base station transmissions is disclosed. Silent and deaf intervals are scheduled in a frame format of a first network to allow transmissions to occur in a second network without interference.

Abstract: A system, method, and wireless device for dynamically selecting a wireless information communication mode for wireless communication of information to at least one wireless device (104). The method includes receiving at least one request for wireless communication of information to at least one wireless device (104). The method further comprises selecting, based at least in part on a total number of wireless devices to receive the wireless communication of information, a mode of wireless communication of information to the at least one wireless device (104). The mode of wireless communication being selected from at least one of a wireless information broadcast communication mode, a wireless information multicast communication mode, and a wireless information unicast communication mode. The at least one wireless device (104) is wireless notified to set its current wireless communication mode to the selected mode of wireless communication to receive the wireless communication of the information.

Abstract: A personal base station configured to connect to the Internet and establish a small area of wireless coverage including means for controlling interference with neighboring personal base stations using a timeslot management mechanism. Timeslot management mechanisms include timeslot interference detection, timeslot power reduction, timeslot allocation, timeslot offset calibration, and timeslot synchronization management that minimizes the number of frequencies required to control inter-cell interference between neighboring personal base stations.

Abstract: The present invention relates to a random access process in a cellular communications system and to a user equipment (UE) and a NodeB adapted for performing the process. A problem with the random access is that the time slot for receiving a random access request (RA-request) has a long unused guard portion. When the UE transmits the RA-request, the distance to the receiving NodeB is unknown, and the purpose of the guard portion is to accommodate for propagation delay. The disadvantage is the inefficient use of the random access channel which results in long delays for UEs to access the network. The present invention solves the problem with a method in which the UE position is determined and the distance and propagation delay between the UE and NodeB is calculated before the transmission of the RA-request, and the timing of the transmission is advanced by the propagation delay.

Abstract: A frame structure of an uplink control information transport channel in the MIMO communication system using multiple transmission antennas and multiple reception antennas, constructed such that an uplink control information transport channel for transmitting control information with respect to each of the multiple transmission antennas includes three fields: a field for acknowledgement (ACK)/negative acknowledgement (NACK) for HARQ (Hybrid Automatic Retransmission Request), a field for CQI (Channel Quality Information) and a field for weight value information with respect to each transmission antenna. Because the control information for controlling each transmission antenna is effectively transmitted, signals transmitted at each transmission antenna of the MIMO system can be controlled in real time.

Abstract: The transmission of high-speed data traffic in IPDLs at a base station of a cellular communications network is controlled. An IPDL is identified which occurs within a set of time slots of a given channel. The channel may comprise a dedicated time slot channel or a packet-oriented time slot channel. More specifically, the channel may comprise a Dedicated Physical Control Channel or a High Speed Downlink Shared Channel. The information within a time slot of the set is shifted. In accordance with one aspect of the invention, the information is shifted to a reduced portion of the time slot of the channel by reducing a spread spectrum factor for the signal carrying the information and increasing the transmission power of the signal. A remaining portion of the time slot spans at least a duration of the identified IPDL. In accordance with another aspect of the invention, the information within the time slot is shifted to another time slot of the channel.

Abstract: An apparatus and methods for handling emergency message frames (e.g., “911” call frames, etc.) sent by a station in a wireless local-area network are disclosed. The illustrative embodiment increases the probability with which an emergency message frame is accorded the highest quality-of-service by modifying one or more IEEE 802.11e parameters (e.g., back-off contention window length, Arbitration Inter-Frame Space [AIFS], etc.) for a station or access point that transmits an emergency message frame.

Abstract: A packet data transmission method of the HSDPA system includes collecting information on the quality of physical channels, a status of the MAC buffer, the priority level of data, the delay of data, and the like, determining the transmission order of data and the size of a data block to be transmitted based on the collected information, and transmitting the data block through the physical layer according to the order of transmissions. Since the HSDPA scheduler takes into account the delay of data, the quality of real-time services can be improved.

Abstract: A system and method for test loop timer operation. A mobile station implementing a test procedure may receive a command to enter a test mode. A timer may be enabled and RLC data blocks may be transmitted. The timer may be disabled when a quantity of the RLC data blocks exceeds a transmit window size or when a countdown value is equal to zero. The the test mode may be a switched radio block loopback mode and the timer may be a T3182 timer. Embodiments of the invention may be implemented in a mobile communication system.

Abstract: In a DOCSIS based satellite gateway data is transmitted over a single downstream channel, at different throughput rates. Data destined for each subscriber/receiver is assigned a throughput rate depending upon the downstream signal quality of that subscriber/receiver. To accomplish this, the downstream DOCSIS MAC data is parsed to extract DOCSIS packets. The DOCSIS packets are then loaded into packet queues based on an identifier within such packets such as the MAC destination address or SID. Each of the queues represents a bandwidth efficiency or throughput rate that can be currently tolerated by specific subscribers based on the current signal quality being experienced at the subscriber location. A PHY-MAP describing the downstream data structure to be transmitted and inserted into the downstream data. Data is extracted from the packet queues in queue blocks as defined by the PHY-MAP.

Abstract: Methods and apparatuses for uplink allocation. A remote station may receive one or more uplink data transfer parameters from a base station using a wireless communications protocol. Data may be selected to be transferred from the remote station to the base station according to the wireless communications protocol based, at least in part, on the one or more uplink data transfer parameters. The one or more uplink data parameters may include a target packet error rate (PER).

Abstract: A simple admission control mechanism for IP based networks is provided. The decision on whether a new flow is accepted is based on the link load information on the paths from the source to destination. The new flow is accepted when the link load is less than a threshold. When at least one of the links on all of the available paths is larger than the acceptable threshold, access is denied to the flow. More than one threshold level may be used. Under the multiple threshold scenario, the traffic may be divided into different classes. The admission control mechanism helps to ensure a network that is not heavily congested.

Abstract: The present invention relates to methods and apparatuses as well as a measurement report signal for reporting measurements on ranging signals (RS1-RS4) received by a mobile station from satellites (SV1-SV4) or calculating a position based on such measurements, wherein each of said ranging signal comprises a stream (201) of data bits (202) spread by a spreading code (203). After synchronizing (501) to data bit edges in the stream of data bits on a ranging signal, a position in time modulo the data bit length for said stream of data bits with respect to a selected point in time is measured (502). The measured position in time could be used by the apparatus performing the measurements on the received ranging signals for calculating (504) the position of the mobile station. Alternatively the apparatus could transmit (503) a wireless signal including data representing said measured position in time, allowing the mobile station position to be determined in another apparatus (101).

Abstract: The present invention considers a direct sequence spread spectrum system wherein every user employs the same spreading code. In a preferred embodiment, received signal is correlated with the training signal. Peaks of correlator output are used to identify the delays corresponding to the significant multipath components. The delays that are within a predetermined number of chips of each other are associated with a hypothesized user. In an alternate embodiment, a user separation technique is used which is based on the observation that after the training period, different users send uncorrelated data. In another alternate embodiment, linear minimum mean squared error (LMMSE) based correlators locked to individual users are employed. These correlators only provide multipath components of their corresponding users as output.

Abstract: Methods, apparatuses and systems directed to facilitating WLAN diagnostics and management using traffic stream metrics. In a data collection stage, according to one implementation of the present invention, localized uplink measurements are taken at a wireless client associated with a wireless access point. During periodic intervals (e.g., every 5 seconds), the wireless client, in one implementation, transmits uplink measurement information to the wireless access point. The wireless access point may also take downlink measurements, which may also include one or more of the following metrics: observed latency, queuing delay, packet loss rate, and packet count information. The wireless access point, in one implementation, may aggregate and report the uplink and downlink metric information to a network management system.

Abstract: In order to measure the rate at which a terminal 2 can receive data from a source 5, 6, 7 the source temporarily increases it transmitting rate. The time taken to receive these higher-rate transmissions is measured at the terminal (or acknowledged by the terminal and measured at the transmitter) and the rate calculated. Inter alia, these measurements can be used for control of layered coding where apparatus for transmitting signals to video or other terminals 2 has coding means 5 for receiving the signals to generate a base signal stream B which is a coarse representation of the signal to be transmitted and at least one higher order stream E1, E2 containing finer detail of the signal not present in any lower order stream. These streams are sent by transmitting means 6 to the terminals, but at least some of the terminals do not receive all of the higher order streams.

Abstract: A channel sharing method and device thereof are disclosed. The method starts by providing a plurality of channels, wherein each of the channels comprises a time interval. A time slot having a width being X times of a maximum value of all the time intervals is provided, wherein C is a positive number. Each of the channels is generated by a permutation of at least one repeat time, which is M times of the width of the time slot, wherein M is an integer larger than 0. A first time slot of the repeat time comprises a signal. A maximum time span of the signals in each channel is the time interval of each channel. All the channels are arranged so that at least one of the signals in each channel is not collided with the signals of other channels in a worst time delay.

Abstract: A data multiplexer that accommodates both industry standard CCSDS data packets and bits streams and standard IEEE 1394 data is described. The multiplexer provides a statistical allotment of bandwidth to the channels in turn, preferably four, but expandable in increments of four up to sixteen. A microcontroller determines bandwidth requested by the plurality of channels, as well as the bandwidth available, and meters out the available bandwidth on a statistical basis employing flow control to the input channels.

Abstract: In one form, the present teachings provide a method and apparatus for broadcasting an event. The method includes receiving data related to an event via an uplink. Another aspect of the method includes determining whether the data is broadcast on a recurring basis. The method also includes determining whether a transponder channel associated with multiplexed program channels has any unused data or bandwidth to broadcast a portion of the data along with the multiplexed program channels. Additionally, the method includes broadcasting the portion of the data in a data stream.

Abstract: A method and system reduce interference between overlapping first and second wireless LAN cells in a medium. Each cell includes a respective plurality of member stations and there is at least one overlapped station occupying both cells. An inter-cell contention-free period value is assigned to a first access point station in the first cell, associated with an accessing order in the medium for member stations in the first and second cells. The access point transmits a beacon packet containing the inter-cell contention-free period value, which is intercepted at the overlapped station. The overlapped station forwards the inter-cell contention-free period value to member stations in the second cell. A second access point in the second cell can then delay transmissions by member stations in the second cell until after the inter-cell contention-free period expires.

Abstract: Apparatus and a method employable in a wireless communication network for managing, among plural communication stations in a group of such stations, bandwidth-sharing of available, unused bandwidth. Implementation and practice of the invention involve (a) establishing a pattern of periodic beacon transmissions having a defined first time spacing between time-next-adjacent transmissions, which transmissions are designed, nominally, to convey bandwidth-availability (transmission-budget) announcements to stations in the group, (b) from within this pattern, choosing a sub-pattern of selected, periodic beacon transmissions having a defined second time spacing between time-next-adjacent, chosen sub-pattern transmissions, which second time spacing encompasses a predetermined number of the beacon transmissions having the mentioned first time spacing, and then (c) utilizing only the selected beacon transmissions in this sub-pattern to convey the announcements of any new (changed) transmission-budget information.

Abstract: The present invention is to provide a wireless routing mechanism by applying a management frame defined in IEEE 802.11 standard to different access points (AP) in a wireless distribution system (WDS) and adding an information element (IE) to the management frame, enabling any AP to be capable of maintaining the integrity of IE based on its own setting and state, determining other APs' operations in WDS based on a received IE and determining whether a physical link (i.e., wireless link) between itself and any of other APs should be established to provide a channel for sending data frames therebetween and automatically establishing a stable, flexible and expansible wireless network topology in a wire network infrastructure based on information contained in a plurality of fields of the IE.

Abstract: Systems and methods for fault tolerant communication are provided. A base site is coupled to a central office via a channel service unit. The channel service unit is coupled to the central office via primary and secondary communications links. A first and second permanent virtual circuit couple the channel service unit to a wireless carrier core network. When there is a fault on the primary communication link or the primary permanent virtual circuit user network interface of an aggregator, the secondary communication link is established and the secondary permanent virtual circuit is activated. Communications are then routed to the wireless carrier core network via the secondary communication link and the secondary permanent virtual circuit.

Abstract: When it is advantageous to do so, a wireless LAN station sends data packets to a destination station via an intermediate station, instead of to the destination station directly. That is, the intermediate station, which serves as a helper to the source, forwards packets received from the source station to the intended destination station. This cooperative data transmission approach can result in system performance improvement, as long as the total time consumed by two-hop transmission (i.e., transmission via the helper station) is less than direct transmission. Such a determination may be made using rate information stored at each station. Specifically, using the rate information, signaling needed to set up a transmission, the amount of data to be transmitted, etc., transmitting the data directly and via a help station may be compared.

Abstract: A wireless signal processor for handling a plurality of wireless sessions comprises a plurality of baseband receivers, one for each session, each receiver producing a digital output, a multiplexer for multiplexing the plurality of digital outputs into a single data stream, a digital signal processor for converting the stream of multiplexed data into a media access controller format, and a media access controller for demultiplexing and framing the stream of data into a plurality of data buffers, one data buffer for each wireless session.

Abstract: A “loose ACK” method by which a radio access network of a cellular network monitors wireless transmission of packets according to a layered protocol including a radio layer (near the physical layer) and an upper layer, the method including: a step (23) of slow release—in what is called normal buffer management—in which the upper layer removes from a buffer maintained by the upper layer the oldest packet in the buffer when the buffer is full and a new packet arrives, and does so independently of whether the packet being removed has been acknowledged by the radio layer of the terminal; and a step (24) of local acknowledgement in which the radio layer sends an acknowledgement to the upper layer on the occurrence of a predetermined event. The local acknowledgement can trigger either special mode buffer management or release of the buffer to a target (entity or layer).

Abstract: A method and system for providing time division multiple access communications is disclosed. The disclosure includes sending a first message in a time slot. The time slot has a slot length. The first message has a first time associated therewith. The first time includes the time required to send the first message and the propagation delay associated with the reception of the first message by a second transceiver. The disclosure also includes determining time remaining in the time slot for sending a second message. The time remaining is based on the first time and the slot length. The disclosure also relates to sending a second message in the time slot if the length of the second message plus the length of the propagation delay associated with the second message is less than the time remaining in the time slot.

Abstract: A wireless communication network includes a plurality of mobile nodes each including a transceiver, a directional antenna, such as a phased array antenna, connected to the transceiver, and a controller connected to the transceiver. The controller schedules a respective semi-permanent time slot for each time frame to establish a communication link with each neighboring mobile node and leaves at least one available time slot in each time frame. The controller also schedules the at least one available time slot to also serve the communication link with a neighboring mobile node based upon link communications demand. The directional antenna is aimed by the controller towards each neighboring mobile node during communication therewith. The controller also coordinates communication with each neighboring mobile node by allocating time slots based upon link communications demand.

Abstract: A management agent ME1 of a target T1 receives a request of log-in from an initiator of interest and determines whether or not a number of initiators that currently log in the target T1 reaches a predetermined allowable number of simultaneous log-in (steps S210 and S212). In the case of an affirmative answer, the management agent ME1 reads an ordinal number of precedence ‘n’ allocated to a GUID of the initiator of interest from a queue (step S213) and reads a time constant mapped to the input ordinal number of precedence ‘n’ from a time constant table (step S214). The management agent ME1 subsequently sends a status packet, which includes a log-in error status and the time constant, to the initiator of interest (step S216). The initiator of interest receives the status packet, reads the time constant included in the input status packet, and outputs another request of log-in to the target T1 at a timing specified by the time constant.

Abstract: Provided is a method of packet transmission capable of efficiently utilizing ACL link resources in transmitting and receiving packets after an ACL link is established in Bluetooth. A Bluetooth device A determines the maximum rate for packet size to be transmitted to a Bluetooth device B established in the link based on the ratio between a token rate A requested by the device A and a token rate B requested by the device B. When the token rate A is greater than the token rate B, the maximum rate N is set from the candidates of current time slot numbers occupiable as an ACL packet. When the token rate A is smaller than the token rate B, a rate is selected from the candidates of current time slot numbers occupiable as the ACL packet based on rate U=N×token rate A/token rate B.

Abstract: In a mixed IEEE 802.11 network, a system and method are provided for preventing beacon delays. The method comprises: establishing communications between an IEEE 802.11e access point (QAP) and at least one IEEE 802.11 station (STA); determining a safety interval with an endpoint; generating red-zone transmissions; and, in response to the red-zone transmissions, preventing STAs from transmitting a message having a length that exceeds the safety interval endpoint. For example the safety interval endpoint may be the TBTT. More particularly, the method: calculates a safety interval duration in response a minimum PHY rate of the STA; and, maintains the calculated safety interval duration in response to preventing STAs from transmitting a message having a length that exceeds the safety interval endpoint. In one aspect of the method, a single red-zone transmission is sent having a length approximately equal to the duration of the safety interval.

Abstract: A method is disclosed to operate a spread spectrum receiver with an active set of base stations. The method includes monitoring a current serving base station of the active set with a Set Searcher and simultaneously monitoring individual ones of remaining base stations of the active set with a C/I (carrier-to-interference ratio) Searcher. One of the remaining base stations is designated as a Candidate base station for potentially replacing the current serving base station and is monitored continuously by a first set of fingers of the C/I Searcher. The other remaining ones of the base stations of the active set are monitored in a time multiplexed manner by a second set of fingers of the C/I Searcher.

Abstract: A novel protocol for an ad-hoc, peer-to-peer radio network that provides collision-free channel access with an emphasis on improving geographic reuse of the frequency spectrum. The protocol of the invention is executed on the reservation or control channel, and provides a method for allocating data transactions on the data channels. The system of the invention utilizes multiple parallel data channels that are coordinated by a single reservation channel. The transceiver of the system employs two modems to solve the channel reliability issues with multiple channel designs, where one is dedicated as a receive-only modem for gathering channel usage information on the reservation channel. High quality voice, video and data may be transmitted. The reservation channel implements a time division multiple access algorithm with dynamic slot allocation. In a distributed manner, nodes determine geographic reuse of slots based on channel quality extracted from the modem.

Abstract: The transmission of ATM, Internet, and satellite communications is unified through international standardized protocol embedment. Global and Local performance optimization are achieved through the combination of combinatorial, dynamic, and probabilistic programming. A simultaneous domino effect of bandwidth conservation, efficiency enhancement, reliability improvement, traffic congestion prevention, delay minimization, and speed multiplication are realized for any digital communication system, particular in Internet. With three levels of error coding in ATM cells, the loss cell recovery and bit integrity are preserved. From its mathematical roots, new combinatorial sets are systematically generated, and applications of the sets are identified. Among the applications, optimal sequences can be produced for multi-user and multi-function communication system designs. Optimality is in terms of maximum possible number of sequences with given sequence length and sequence characteristics.

Abstract: A wireless device for use in an ad hoc network is provided. The wireless device includes a transceiver, a global positioning system, and a controller. The transceiver is capable of receiving positional information from a plurality of remote users. The global positioning system is capable of generating positional information regarding the wireless device. The controller selects a first portion of the plurality of remote users to be within a pro active region of the ad hoc network based upon the positional information, and then maintains information on the remote users selected to be within the pro active region.

Abstract: The present invention provides efficient and effective quality of service for information that is time sensitive (e.g., real time data). An intermediate network communication system and method (e.g., a router) of the present invention performs cut through switching to reduce latency problems for time sensitive information. In one embodiment of the present invention, communication packet header information is encoded with a time sensitive identifier that identifies the information as time sensitive. In one exemplary transfer control protocol/internet protocol TCP/IP implementation of the present invention, time sensitive indication is provided in the link layer information. In one embodiment of the present invention, time sensitive information is dropped if the intermediate network device can not communicate the information within specified timing constraints.

Abstract: A method and system reduce interference between overlapping first and second wireless LAN cells in a medium. Each cell includes a respective plurality of member stations and there is at least one overlapped station occupying both cells. An inter-cell contention-free period value is assigned to a first access point station in the first cell, associated with an accessing order in the medium for member stations in the first and second cells. The access point transmits a beacon packet containing the inter-cell contention-free period value, which is intercepted at the overlapped station. The overlapped station forwards the inter-cell contention-free period value to member stations in the second cell. A second access point in the second cell can then delay transmissions by member stations in the second cell until after the inter-cell contention-free period expires.

Abstract: In a satellite mobile telecommunications system based on the GSM standard, and using a TDMA frame structure, discontinuous transmission (DTX) mode is used to take advantage of the substantial silences which occur during normal speech. In this mode, traffic channel (TCH) data is not sent, but control of the link between a ground station and a user terminal is maintained by sending control channel data bursts (SACCH) together with silence descriptor (SID) frames. To avoid high peak to mean values of transmission power at the satellite, the emission time of the bursts is controlled so as to be uniform over the available sending opportunities. Conventional techniques for doing this cannot be used in a system which includes diversity operation. Therefore, the burst transmission time at the ground station is set in dependence on a reference provided by the user terminal which is a modified version of the reference generated for contention resolution of random access requests.

Abstract: A method is provided for transmitting data packets from a source device in a wireless network. The source device receives a channel time allocation identifying the source device as assigned to transmit and a destination device as assigned to listen during the channel time allocation. If the source device has any primary data to send to the destination device, it will do so during the channel time allocation. If time remains in the channel time allocation once the primary data (if any) has been sent to the destination device, the source device will determine whether it has any secondary data to send to a secondary device. If so, the source device will determine whether the secondary device will be listening during the channel time allocation. If the secondary device will be listening, the source device then sends the secondary data to the secondary device during the channel time allocation.

Abstract: In a multi-path detection circuit for use in a CDMA communication system, a first peak is detected by searching a maximum value over a whole of data blocks composed of delay profile data. A second and the following peaks are detected by carrying out maximum value searching operation again only about a data block that is renewed in the delay profile data. As the remaining data blocks, a maximum value searched a previous time is preserved and used a next time and, therefore, reduction is possible in connection with the number of detection cycles necessary for detecting the second and the following peaks.

Abstract: Providing data services using idle cell capacity in a cellular communications system. The system and method assign priorities to each remote user device in the cellular communications system. In response to a request for service for a remote user device, the mobile switch determines whether an idle channel is available for the remote user device. If no idle channel is available, the mobile switch determines whether a remote use device with a lower priority than the requesting remote user device is using a channel. If a lower priority remote use is using a channel, its call is terminated and the channel is assigned to the requesting remote user device. If no lower priority remote user device is using a channel, the request for service is put into an ordered queue to wait for the next available idle channel.

Abstract: A communication system (100) includes an aircraft (120) that acts as a repeater between ground equipment (101) and communication units (128) on the ground. The ground equipment (101) includes multiple base transceiver stations (104, 106, 108) that provide traffic channels, control channels, and access channels. The channels are all in a single beam (124) projected from aircraft (120). Relative loading on access channels is influenced by access class lists (200, FIG. 2) assigned to control channels. Access classes can be transferred from one list to another, or they can be removed from a list. Relative loading of traffic channels on the base transceiver stations is influenced by assigning different time offsets to base transceiver station so that calls can be transferred from one base transceiver station to another.

Abstract: The present invention relates to a mobile communication system, and more particularly, to a method of adjusting a signal power in a variable data rate mode. Accordingly, the present invention includes steps of allocating a reference pilot signal level to each of a plurality of data rates supported by the system and adjusting the reference pilot signal level for a changed data rate based on an external control information and adjusting a power control threshold for secondly adjusting the reference pilot signal level corresponding to the reference pilot signal level.