Abstract: A method and apparatus for broadcasting messages in accordance with the presentinvention transmits a broadcast message within a wireless communication system or network utilization of redundant Request-to-Send type or broadcast notice messages or packets BRTS). A source node repeatedly transmits a sequence of these messages over a system reservation channel with each message containing a sequence identifier. The sequence identifier of each succeeding message has a value immediately preceding the identifier of the previously transmitted broadcast notice message. A destination node receives the messages and determines the transmission time of the broadcast message based on each received message identifier. Subsequent transmission and reception of the final broadcast notice message in the sequence, the broadcast message is transmitted by the source node to the destination node over a data channel identified in the transmitted messages.

Abstract: A communication device includes a common database shared between Internet communication and voice communication subsystems whereby a user selects a given entry in the directory and further makes selection of communication between Internet and voice communication channels. A base address designator for each directory entry corresponds to a telephone number and to a registered domain name for an entity associated with that directory entry.

Abstract: A method of frequency utilization in mobile communication which is capable of realizing efficient frequency utilization in the case where widths of the uplink communication frequency bandwidth and the downlink communication frequency bandwidth are different in mobile communication is disclosed.

Abstract: A cordless telephony device includes a base station for radio communication with a handset on an operating frequency selected from a set of frequencies. The base station and handset include a scanning element for receiving and analyzing a connection request transmitted on a transmit frequency between the base station and handset. The receiving one of the base station or handset detects the transmit frequency and selects the transmit frequency as the operating frequency for radio communication between the base station and handset.

Abstract: Received channels are grouped into channel groups in which each channel group includes channel members with commensurate signal parameter values to enhance performance of a wireless communications system. A data processing system establishes boundaries of each channel group to achieve an approximately equivalent quality of service (e.g., blocking rate) for each channel group based on the probabilities of occurrence of measured signal parameter values.

Abstract: When an incoming call to a wireless communication apparatus is detected, a wireless control apparatus uses a wireless link, which has been established by previous communication, to perform succeeding communication. Examples of communication include communication of audio or data already completed, or, when there are a plurality of wireless communication apparatus, communication of control information by a wireless link established when notification of an incoming call is given to the wireless communication apparatus.

Abstract: A system for efficiently employing a quick paging channel signal to determine the presence of a forthcoming primary paging channel signal adapted for use with a wireless communications system employing a quick paging channel and a primary paging channel. The system includes a first mechanism for calculating a first decision parameter representative of a quality of a signal environment through which the quick paging channel is propagating. A second mechanism calculates a second decision parameter representative of a value of the quick paging channel signal. A third mechanism indicates, based on the first decision parameter and the second decision parameter, the presence or absence of an immediately forthcoming page message on the primary paging channel. In a specific embodiment, the first decision parameter is based on a pilot signal and a carrier signal to interference ratio associated with the quick paging channel signal.

Abstract: A method is illustrated for reducing the call setup time of high priority calls such as voice or high speed user generated data without unduly wasting RF frequency resources on non priority calls such as short message calls. This is accomplished by ascertaining the call priority at the base station controller (BSC) level in a GSM system soon after call initiation and immediately changing the channel assignment for use by the remaining signalling type messages to a different operational speed where appropriate. The concept is further extended by supplying the call priority data to a called party's BSC such that all signalling messages after initial contact can be at the operational speed appropriate to the priority of the call.

Abstract: A telecommunication system in which a plurality of terminals communicate with a base station or a connection station and a management unit determines the allocation of resources for calls from each terminal to the connection station. At least some of the terminals include a plurality of connections. Calls are effected by means of cells or packets. The allocation of resources is determined cell by cell or packet by packet in each connection. The management unit allocates communication resources to each terminal according to the total number of cells or packets waiting in each terminal and a weighting coefficient allocated to each terminal. The allocation of resources by the management unit is independent of the number of connections of each terminal. Each terminal allocates resources to each connection according to the overall resources allocated to it by the management unit and a weighting coefficient allocated to each connection of the terminal.

Abstract: In a method of selecting a voice channel for making a telephone call via a mobile telephone, an intelligent cellular peripheral (ICP) creates and sends a mobile assisted channel allocation (MACA) list to a digital control channel (DCCH) radio. The DCCH radio sends the MACA list to the mobile telephone for scanning. The ICP assigns an acceptable carrier over interference power ratio (C/1) margin to the mobile's forward voice channel (VCH) received signal strength indicator (RSSI) during call setup. In another feature of the invention, the ICP disqualifies from further consideration the MACA channels whose noise levels are too high, and prioritizes the remaining channels in descending signal strength order.

Abstract: The invention relates to a control unit for a terminal of a digital, cordless telecommunication system, and to a method for such a control unit.

Abstract: The present invention relates to a physical channel allocation method of a mobile communication system and a communication method using the same which is capable of allocating physical channels efficiently for a RACH (Random Access Channel) and a CPCH (Common Packet Channel) having extra up link scrambling code in a next generation mobile communication system, the communication method of the mobile communication system in accordance with the present invention comprises transmitting a preamble signature code Csig,s generated by using one signature among a plurality of signatures AP#s and a PRACH access preamble code Cpre,n,s generated by using one PRACH preamble scrambling code SC#i among a x-number of PRACH preamble scrambling codes SC#m permitted to the pertinent cell along with an AP (Access Preamble) through a RACH from a terminal to a base station, receiving an AI informing a usage of the signature by decoding a signature included in the received AP and the kind of the PRACH scrambling code fr

Abstract: An apparatus and method for improving the rescan capability of a telecommunications system searching for an Acceptable Service Provider (ASP) after a failure by a given mobile terminal to link with the ASP. After a mobile terminal's communication link with an ASP has been severed or during startup, i.e., whenever the ASP is temporarily unavailable, a mobile terminal, now camped upon an Unacceptable Service Provider, performs one or more partial rescans to re-establish contact with the ASP before performing a full power-up rescan.

Abstract: In a heterogeneous mobile telecommunication system such as the Universal Mobile Telephone system, a system and method of resource allocation comprising the steps of determining the current proportion of each rate traffic for a telecommunication cell; the base transceiver station controlling the cell then applying a predetermined threshold to the loading level in that cell.

Abstract: A digital portable telephone is configured without the complex circuitry normally required for its base unit and handset unit to switch between transmit and receive states while frequency hopping in a frequency hopping system. The architecture for this digital portable telephone provides improved performance over that of other digital portable telephones by combining the frequency hopping spread spectrum technique with other spread spectrum techniques in communications between the handset unit and the base unit. Specifically, delta modulation and a redundant transmission of the signal are the other forms of signal spreading that are employed. Such signal spreading advantageously achieves additional processing gain. Another attractive attribute of this architecture is a high level of immunity to interference from other portable telephones also operating in the same frequency hopping band.

Abstract: A system, device, and method of controlling a wireless communication system including a plurality of wireless communication devices and a wireless control unit for controlling the wireless communication devices. The wireless communication devices and the wireless control unit are capable of communicating using a frequency hopping method. The wireless control unit manages the direct communication among the wireless communication devices as well as communication between the wireless control unit and the wireless communication devices.

Abstract: A system and method in a radio telecommunications network for automatically conveying a Wireless Office System (WOS) frequency set to a mobile station (MS) belonging to the WOS. The network includes a public cell, and a private WOS located within the public cell. A WOS controller sends the WOS frequency set from the WOS to an Equipment Identity Register (EIR) in the network whenever the WOS changes its frequency set. When the MS registers in the public cell in which the WOS is located, a mobile switching center (MSC) serving the public cell notifies an Intelligent Roaming Database (IRDB) of the registration. The IRDB fetches the WOS frequency set from the database, and obtains location information for the MS from a home location register (HLR). The IRDB then sends the WOS frequency set to the MS in an IS-136 R-DATA message.

Abstract: A frequency scanning radio receiver scans and receives transmissions on discrete radio frequencies. The frequency scanning radio receiver is programmable to monitor frequencies in a geographical area where the receiver is located. The receiver is coupled to a communication device, located externally or internally of the receiver, for communication with a positioning system, such as the global positioning system, to determine the geographical location of the frequency scanning radio receiver either automatically or in response to a manual request. A data base of frequency allocation data, either internal to the radio or in a remotely located host system, provides frequency data to a memory in the frequency scanning radio receiver based on geographical location of the receiver determined through the communication device to program the receiver to monitor local radio frequency transmissions.

Abstract: A telephone has a speech detection circuit connected to a microphone so that an external line lamp is turned off when a transmitting signal is detected by the speech detection circuit or when a dial key is pressed. When a hold key is pressed, power for a transmission section is turned off while power for a receiving section is turned on. The power for the transmission section is turned on in response to key input or receiving of a control signal.

Abstract: In a transmitting method, it is possible to avoid influences of adjacent-channel interference to perform communication satisfactorily. In the case of performing transmission with a previously set sending power, the transmission is performed with the set sending power with respect to a channel having the largest sending power. With respect to a channel having the next largest sending power, if its adjacent channel is the determined channel, the transmission is performed such that the sending power is corrected on the basis of the sending power of the determined channel. Thereby, it is possible to prevent the signal-to-interference wave power ratio C/I of the channel from deteriorating due to the leakage signal (interference wave) from the adjacent channel. Thus, it is possible to avoid the influences of adjacent-channel interference to thereby perform communication satisfactorily.

Abstract: A method and apparatus are provided for detecting a message waiting condition on a telephone. The method includes providing a control signal to a detect circuit in response to terminating a local use of the telephone, determining a message waiting signal on an external line connected to the telephone in response to the control signal, and activating a visual message waiting indicator in the telephone in response to determining the message waiting signal on the external line.

Abstract: Call processing method for exchanging channel information between a radio terminal and a base station by using a traffic channel. The radio terminal generates a list of radio terminal traffic channels having interference below a predetermined level. A first traffic channel is selected from the generated list having least interference and a call request is transmitted to the base station on the first selected traffic channel. The base station generates a list of base station traffic channels having interference below a predetermined level. A determination is made whether the transmitted call request has been received by the base station. A check of whether the first selected traffic channel is included in the list generated by the base station is made and a call request response signal is transmitted to the radio terminal when said first selected traffic channel is included in the list generated by the base station.

Abstract: In a GSM (Global System for Mobile communications) system, a lookup table used to scramble intermediate results in a pseudorandom fashion is also used to uniquely associate radio facilities with one another, particularly to associate mobile stations with a base station. Several different lookup tables (RNTBLi) may be used which are uniquely assigned to the radio facilities, with the intercommunicating radio facilities being assigned the same lookup table. The different lookup tables are preferably generated on the basis of subscriber identifications, whereby each subscriber is assigned a respective one of the lookup tables.

Abstract: A method and apparatus for controlling communications between a base and a handset capable of communicating with each other on at least one communication channel within a channel set. The method involves transmitting a new channel message including a preferred channel identifier from the base to the handset, on different channels of the channel set until an acknowledgement signal is received from the handset. In response to the acknowledgement signal, the preferred channel identifier is stored in a base working channel transmit buffer. Further communications between the base and the handset are conducted on a communications channel identified by the preferred channel identifier.

Abstract: In a radio communication system (local radio system) having a plurality of radio cell stations (CS) and a plurality of radio personal stations (PS), when a certain radio personal station (PS) proceeds from a monitoring state to a call state, even during the call, the radio cell station (CS) of interest sends successively the information (slot and frequency information) which is required for the certain radio personal station (PS) to be returned back to the monitoring state to the certain radio personal station (PS) to be stored in the certain radio personal station (PS). By adopting such a procedure, when the call state has been quitted, even if the certain radio personal station proceeds once to a control channel, there is no need of obtaining the information required for the certain radio personal station to be returned back to the monitoring state. Since a time period for obtaining the information is not required, the transition from the call state to the monitoring state is immediately made.

Abstract: A wireless communication system, such as a cellular communication system prioritizes calls to have a low, regular or high priority. The communication channels provided by a base station are divided into regular channels and reserved channels. All calls are connected on regular channels until the regular channels are all full. When the regular channels are all full, then regular priority calls are connected as low priority calls or not at all. If a regular priority call is connected as a low priority call it is connected via a reserved channel. Once all the reserved channels are full, then a high priority call is attempted to be connected by dropping a low priority call and using the reserved channel that the low priority call was using.

Abstract: A zone selection method for a mobile radio communication system selects one among many radio zones and switches a primary radio zone where a given mobile terminal exists to the selected radio zone without concentrating incoming and outgoing calls at a specific radio zone. The method prioritizes the radio zones according to the reception levels of signals transmitted from the radio zones and received by the mobile terminal as well as the performance of the radio zones including the call connection ratios and channel usage ratios of the radio zones, and then, the method selects the one having the highest priority among the prioritized radio zones.

Abstract: A cellular radio system is to be implemented in an existing facility which performs switching functions and provides service features, without requiring major changes therein. Communication between the individual base stations (BS1, BS2, BS3, BS4) takes place by means of radio via existing radio channels. A cordless terminal (HS1) is assigned to a base station. If the terminal is located in the area of another base station during an incoming call, the terminal is searched for via a radio channel between the base stations. If it is found in the area of the other base station, the call is handed over to this other base station. The same applies to outgoing calls and to other functions.

Abstract: The invention relates to a procedure for ensuring emergency calls in a wireless local loop environment which is based on technology employed in a mobile telephone system and which comprises a telephone exchange (1), an access node (2) connected to the telephone exchange, a terminal device (3) and a base station (4) connected to the telephone exchange via the access node and serving to transmit call signals between the access node and the terminal device, in which the home network (5) of the terminal device is defined by the base station and the associated access node and in which base stations (7) of other networks are disposed in the environment of the local loop, so that the terminal device receives information signals from the surrounding base stations and, based on said information signals, determines the base station it is communicating with, and the emergency call is set up via any base station compatible with the terminal device.

Abstract: A method and apparatus for reducing power consumption in a roaming portable communication device is described. Various embodiments include optimizing a channel acquisition scan, or pre-scan, and a background scan in order to delay the reaction to a suspected loss of coverage to prevent unnecessary roaming and the associated power consumption. A list of received signal strengths is generated for a number of possible channels. Only those channels with a received signal strength above a threshold level are retained. The received signal strength of the remaining possible channels is retested. The selected channel is determined from the remaining possible channels by comparing the received signal strength of the last channel used, the last channel attempted (if available), and a best channel having the highest received signal strength.

Abstract: In order to permit flexible allocation of transmission capacities in such a radio transmission system, without interrupting or disturbing existing radio links, provision is made for a control device which, in response to a change of transmission channels in the central station and in the subscriber stations in question, adjusts one or a plurality of transmission parameters so that both the band width of the available radio frequency channel is optimally utilized, and a required resistance to interference is attained in the radio frequency channel. To that end, the modems existing in the central station and in the subscriber stations are equipped with L transmission channels and K receiving channels, of which, in each case, a maximum of L-1 in the transmission direction, and a maximum of K-1 in the receiving direction are activated.

Abstract: A radiotelephone system (100) includes a radiotelephone (102) and a central device (104) that communicate via radio frequency (RF) signals. The radiotelephone (102) includes a user interface (114) which permits the user to request a channel change by the central device. A signal is communicated to the user if a channel change is denied. A channel scan can be conducted by the radiotelephone to identify a new channel.

Abstract: A communicating apparatus for performing a communication through a plurality of communication channels including a control channel is constructed by a detection unit to detect a hold request and a transmission unit to transmit a channel switch command to a terminal in a waiting state by the control channel. The transmitting unit transmits the channel switch command such that the terminal waits and responds to a held communication in a state where the terminal is switched from the control channel during a holding state.

Abstract: A communication system has cordless system units (1, 2, 3, 4) connected to a communication network (7). The cordless system units respectively has at least one cordless base station (11-13, 21-23, 31, 32, 41). The identification of a respective cordless terminal equipment (8) is stored in a cordless system unit (1, 2, 3, 4) allocated thereto as a home system unit. The possibility or, respectively, allowability of a connection setup from the respective cordless system unit (1, 2, 3, 4) to a cordless terminal equipment (8) can be checked by a check apparatus (15, 25, 35, 45) respectively allocated to the cordless system units (1, 2, 3, 4). The cordless system units (1, 2, 3, 4) are connected to a network (6, 61) offering a connectionless service in order to exchange information with one another dependent on check results of the check apparatus (15, 25, 35, 45).

Abstract: A structure of a liquid crystal device cutting down the power consumption is materialized. In a liquid crystal display device comprising at least two display portions of a dot matrix portion and an icon portion in the same panel, drive is carried out such that both of the display portions are displayed in a normal operation mode and, only the icon portion is displayed in a power-saving operation mode such as when the liquid crystal display device is waiting for operation or is standby. In the power-saving operation mode, the duty ratios of all of the display portions in the power-saving operation mode are lower than those in the normal operation mode, and time shared drive waveforms using the power source voltage as it is which does not require bias voltage are applied.

Abstract: A device of the DECT type is disclosed which includes a base station connected to the telephone network transmitting an identification information signal which defines a calling user. This station is formed by a processor assembly, a memory containing an execution program and a random-access memory. The device also includes at least one handset formed by, inter alia, a display, a processor assembly notably intended to control said display. For transmitting the identification information, broadcasting means are provided for broadcasting to all the handsets by using message transmission means for transmitting messages of the service provided by said DECT standard.

Abstract: A cordless telephone arranged for operation in a frequency hopping system includes an arrangement which allows multiple cordless telephone portable units to operate in close reception proximity to each other and without interference while either responding to a service request from a cordless telephone base unit or in generating a service request to the base unit, also in the system. Contention between portable units in the system in responding to a service request from the telephone base is resolved through use of a polling process wherein the base unit polls each one of the portable units as part of this polling process. Each portable unit is assigned a number of acquisition channels distributed across the frequency hopping channels used for normal communications between the base unit and the portable units. These channels are different from and do not conflict with other acquisition channels respectively assigned to other portable units, also in the system.

Abstract: A method and apparatus for detecting additional base stations in a cellular radio telephone system in which communication channels are opened with a selected base station on a selected channel.

Abstract: In a mobile communication system of the present invention, a cordless base unit LBU is connected to a wired subscriber line SL. The base unit LBU detects a radio channel assigned to a cell other than a cell where the base unit LBU is located, among radio channels assigned to the cells of a cellular radio communication system. This radio channel is used as a radio channel for a cordless call. On the other hand, a cellular cordless telephone CCT is provided with a mode switch. When a cordless mode is designated by the mode switch, a radio channel for a cordless call is detected, as with the case of the base unit LBU. At the time of the cordless call, a transmission power level of the cellular cordless telephone CCT is set at a weak level smaller than that for a cellular call.

Abstract: A method of channel selection between a remote and a base for a cordless or wireless communication system includes the steps of creating a history table having channels assigned to columns and intervals assigned to rows, scanning the channels to determine if interference exists, recording the channels having interference for a given interval in the history table and determining which channel has the least amount of interference over a predetermined number of intervals to select the best channel for communications.

Abstract: The present invention relates to a connection establishment method and a radio system. When a base station (11) detects a preamble (20) from a subscriber terminal equipment (13), the power adjustment of a closed loop is started for controlling the transmission power of the subscriber terminal equipment (13). Signals (15) of the base station (11) and the subscriber terminal equipment (13) are synchronized and the subscriber terminal equipment (13) sends a randomly selected identifier. The identifier determines a transit channel to which the subscriber terminal equipment (13) suggests to move. The base station (11) may change the suggested transit channel and echo the identifier back to the subscriber terminal equipment (13), and the base station (11) and the subscriber terminal equipment (13) communicate on the transit channel from which they move to a traffic channel. The inventive method accelerates connection establishment.

Abstract: A method and a system to obtain the Primary Receiver Scan Carrier Number (PSCN) starting from the data regarding the multiframe number (MFN) in a personal telephone system realized according to the DECT standard. The following steps are present calculating the minimum common multiple (m.c.m.) between the duration of a multiframe (160 ms) and the period necessary for the complete scanning of the frequencies by a radio fixed part (RFP); dividing this minimum common multiple (m.c.m.) by the duration of a multiframe and taking the quotient to obtain a periodicity value; waiting that the multiframe number (MFN) assumes a whole multiple value of the periodicity calculated as indicated above and beginning and the scanning starting from the known frequency (x) which is common to all fixed radio parts (FRP) to be synchronized.

Abstract: A cordless telephone set having a base unit and handset units and enabling communications using a channel selected from a plurality of channels. The cordless telephone set comprises apparatus for storing a specified number of channels selected by the telephone apparatus and storing historical channel use data. Whether or not a channel is unused is determined and channels used with high frequency with the data stored in the first storage are changed to those used with low frequency according to the historical use data. Channels that are stored are progressively specified prior to a start of call and a specified channel is selected, if it is determined that the channel is an unused one.

Abstract: A free channel double checking protocol and system are disclosed. More particularly, the system includes at least one primary radio station and a plurality of secondary radio stations, in which a secondary radio station is matched to a primary radio station and a wireless communication is established via a full duplex communication link. The primary and the secondary stations establish the communication link using a free channel double checking protocol. The free channel doubles checking protocol checks whether a free channel exists between stations. After setting up the communication link, a calling station may confirm to a called station that a reliable communication link has been established.

Abstract: When an interference signals is detected by a base station, the base station issues a report to a switching apparatus. The switching apparatus checks self to see whether it is in a standby mode waiting for a frequency change completion report from another base station which is in the process of changing the control channel frequency. If the switching apparatus is satisfied that the station should be given a new control channel frequency, it issues a frequency change command to the requesting base station, and the base station receiving the command revises the current control channel frequency. In the meantime, all other requests from other stations are denied by the switching apparatus until the requesting base station has successfully completed the process of changing the control channel frequency. The base station acknowledges the completion of frequency change process by sending a frequency change completion report to the switching apparatus.

Abstract: A system and method for allowing intercom and multiple voice channel communication within a private telephone system employing a private base station and a multiplicity of standard cellular terminals is disclosed. Full duplex intercom communications between two users within the private telephone system may be facilitated by use of two half-rate channels, one channel transceiver on even-numbered TDMA transmission frames and another channel transceiver on odd-numbered transmission frames, both from respective terminals to a private base station, which mediates the communication therebetween. Multiple voice channels are also provided within the private telephone system, allowing two users on two separate channels to communicate with respective remote wireline users simultaneously.

Abstract: A radio frequency (RF) signal transmitter/receiver system comprises a pair of transmitter/receiver units. A microcomputer-based RF carrier detect system determines when an RF signal is present or absent. The RF carrier detect system is also responsive to noise interference signals at or near its currently-tuned receiving channel. In periods of inactivity, the RF signal receiver monitors its currently-tuned channel and upon detection of noise interference or upon a determination that the currently-tuned channel is occupied, initiates a fast scan operation to identify an unoccupied and relatively interference-free channel, and transmits a command to its paired transmitter/receiver unit causing it to tune to the newly-identified unoccupied channel.

Abstract: A communication channel is dynamically assigned to a mobile station in autonomous decentralized channel assignment in TDMA/TDD communications system. An interference detection criterion is determined depending on a signal strength of a call request signal. It is determined whether interference occurs in a transmitting time slot relative to the interference detection criterion in a selected channel, and further determined whether interference occurs in a receiving time slot relative to a predetermined interference detection criterion in the selected channel. When it is determined that no interference occurs in the selected transmitting and receiving time slots, the selected channel is assigned to the mobile station.

Abstract: The radio paging receiver is a radio paging receiver which can limit, even if a call of a message which does not coincide with a password is received, the call irrespective of whether the calling password is forgotten. The radio paging receiver has a telephone directory function by which data of a name, an address, a telephone number and so forth of an individual can be stored, and uses each of telephone numbers of the telephone directory data as a calling password. When a received message includes numeric data of four or more digits, a receiver carrying person retrieves the lowest four digits of the numeric data from telephone numbers of the telephone directory data by a controller 4-1, 4-2 and 4-3 of a paging apparatus by a password, and only when a coincident telephone number is detected, a calling operation by speaker alert sound is performed.

Abstract: A decline in effective data transmission speed and interference between adjacent channels are prevented in a wireless telecommunication system. A hopping pattern used in direct communication between wireless telecommunication terminals is stored in the wireless telecommunication terminal, and communication is performed upon synchronizing a hopping pattern used in communication via a main unit and the hopping pattern used in direct communication between wireless telecommunication terminals.