Abstract: Multiplex transmission apparatus 10 on the transmitting side multiplexes received signals from non-voice signal input output apparatus 14 and voice signal input output apparatus 16, and also transmits the multiplexed signal from communications network 30 by digital portable telephone 12 on the transmitting side. The digital portable telephone transmits a signal per 20 msec, so that multiplex transmission apparatus 10 alternately transmits the voice signal and the non-voice signal at an interval of 20 msec, for example. Multiplex transmission apparatus 20 sorts out the voice signal and the non-voice signal from the supplied signal by checking the error detecting code of the supplied signal. Multiplex transmission apparatus 20 can judge the type of the signal according to the type of the error detecting code, because a different error detecting code is added to each signal.

Abstract: A short cell multiplexing is provided for chiefly transmitting data shorter than the payload of a standard ATM cell (basically the data of less than 48 bytes, but the data more than 48 bytes can be allowed). A standard ATM cell assembler 1 converts various forms of input information into short cells, places the short cells in standard ATM cells efficiently considering their information length, and output them to a B/ISDN network 7. The standard ATM cell disassembler 2 disassembles the standard ATM cells, which are assembled by the standard ATM cell assembler 1 and is input through the B-ISDN network 7, into short cells, converts the short cells into those with the original input information forms, and outputs them to channels. The configuration makes it possible for the short cell ATM cell multiplexing to improve channel efficiency with small delay, and matching to the standard ATM system.

Abstract: An improvement of an ATM transmission system between a mobileservices switching center and a base station in a mobile communication system. A delay time for generating/sending out a cell is minimized to ensure the information quality required for real time transmission. When the transmission interval of a call type a is T, call types b and c whose periods are twice and four time that of the call type a should be transmitted at intervals twice and four times that of the call type a. A transmitted frame assembler/disassembler 104 in the base station prepares transmitted frames 201 each including the cell slots 201-1, 201-2 and 201-3 for transferring the respective call types, and schedules such that the transmitted frames are sent out to a channel 112 at the interval T, thereby enabling the transmission to be carried out without delay.

Abstract: Data of an input data series is written into a first interleaver. The data is read out column by column or row by row from the first interleaver and written into a plurality of second interleavers column by column or row by row. The data is read from each of the second interleavers and written into one or a plurality of third interleavers as necessary. The operation is repeated once or a plurality of times, thereby reading the data from each of the interleavers and generating a data series. Interleaving is carried out by generating interleaving patterns with a plurality of interleaving patterns. Further, an interleaving pattern suitable for turbo encoding or transmission is generated.

Abstract: An adaptive array antenna having a plurality of array antennas including a plurality of antenna elements which are spaced at first intervals at which a large first correlation is exhibited, the array antennas being spaced at second intervals at which a second correlation is negligible, where a diversity of effects are produced, such as fading compensation, eliminating by interference waves coming from the same direction, and augmenting the gain by main beam tracking, providing one or more calibration signal coupling parts and multi-beam synthesizing circuit are so as to remove individual variations in calibration signals and to perform highly reliable calibration.

Abstract: Disclosed is a mobile communication system including a network constituted of at least one switching center and a plurality of base stations, and a mobile station which communicates with the base stations simultaneously. The system permits varying transmission delay between the switching center and the base stations according to the type of services available to the mobile station. The object of the present invention is to propose a communication which permits varying transmission delay according to the type of service currently employed, and to promptly recover a synchronization state even if an out-of-sync state happens. To attain the object, a memory means (mobile switching center processor 32) stores transmission delay characteristics corresponding to services which are available to the mobile station.

Abstract: In a device and method for minimizing transmission delay of low-rate data such as voice data and for enhancing the transmission efficiency in multiplexed data communication using AAL type 2 protocol the SSCS of the high-rate data side of an AAL type 2 converter is responsible for addition and elimination of a dummy code field, error correction, and division and reassembly of data unit. A dummy code field and restorative code field are attached to a user data unit which is supplied from the higher layer in a source device, whereby a data unit is prepared. The data unit is then divided into segments 1 to m of a fixed-length, 45 octets. Successive code fields 1 to m are attached to the segments 1 to m, whereby data blocks 1 to m are prepared. The data blocks 1 to m are successively transferred to the AAL-2 converter. In a destination device, from the data blocks 1 to m, the user data unit is reassembled.

Abstract: A multiplex system for multiplexing packets into ATM cells to be transmitted, which can implement effective use of channels corresponding to irregular traffic qualities in services with various types of quality conditions in an actual environment. In response to a connection establishment request (S402), current required bandwidths B1, . . . , Bm are changed to B′1, . . . , B′m by adding the new connection, which causes bandwidths X1, . . . , Xm which are assigned to the channels to be changed. When the desired bandwidth including the requested connection is less than an available bandwidth of the corresponding channel, an assigned bandwidth change processing (S406) is activated to assign new bandwidths in accordance with desired bandwidths. The bandwidth assignment change is carried out by changing ratios of extraction rates of packets from the buffers in the multiplex system.

Abstract: An interleaving method including the step of (1) receiving a data sequence having a plurality of blocks, each having a length based on a prime number P; (2) generating sequence permutation data by performing a given operation on elements of a Galois field of a characteristic P; (3) permuting results of the given operation, so that sequence permutation data are generated; and (4) permuting a sequence of data of the data sequence in accordance with the sequence permutation data.

Abstract: An adaptive array antenna for use in a base station according to the CDMA mobile communication system. A number of antenna elements greater than the number of elements (a reference number) which would be required when directional antenna elements each having a beam width which is the same as a sector angle are used to provide a service area having a sector angle which is narrower than the element beam width, or a number of antenna elements each having a beam width broader than the sector angle which is less than the reference number may be used to define a service area.

Abstract: A radio paging signal coding control scheme capable of improving the reception characteristic of the receiver by carrying out a coding control to determine logical channels for accommodating paging signals such that the transmission rate equivalently becomes as low as possible according to the paging signal traffic, without interrupting the paging signal coding processing while maintaining the combination of transmission rate and modulation scheme for frames, is disclosed. In the case of using prescribed transmission rate and N-valued modulation scheme, logical channels to be used for transmission of paging signals among a plurality of available logical channels are determined by setting priority orders among a plurality of available logical channels such that a number of states of modulated signals becomes less than N when paging signal traffic is small.

Abstract: To register current codec types of a mobile station with a network side, the mobile station 11 notifies, when it conducts the location registration or a mobile user replaces his or her old mobile station, a visitor location switching system 5, which is associated with the current location of the mobile station, of the codec types supported by the mobile station 11 using a mobile communication control signal between the mobile station and the mobile network. Receiving the notification, the visitor location switching system 5 enters the update of the codec types into a location register 41 in a memory home station that controls the mobile network 2. The codec types can be thus registered into the mobile network 2 using the mobile communication control signal. Since the mobile network 2 can always acquire the latest codec types for the mobile station, the discrepancy is canceled between the codecs the mobile station supports and the codecs the network registers.

Abstract: A baseband spread modulation signal is input to a matched filter (131). The matched filter (131) despreads the spread modulation signal using the output of a spreading code replica generator (132). The matched filter (131) outputs the despread signals at L timings. The output signals are multiplied by multipliers (201) by corresponding weighting factors output from a weighting factor controller. The multiplied outputs are demodulated by demodulators (202), and RAKE combined by an adder (118). A data decision section (203) generates from the RAKE combined signal a data decision signal. An error signal generating section (204), receiving the RAKE combined output and the data decision signal, obtains an error signal.

Abstract: An EOR (XR11, XR12) of outputs from a plurality of shift stages S1, S2, S4 of an M-series generator 31A is formed, thereby obtaining an M-series which has a desired delay, which in an example is a three bit delay with respect to the output code from the generator 31A. Similarly, outputs from a plurality of shift stages are combined and an EOR thereof is formed to provide another delayed M-series. An EOR of each output from the simultaneously delayed code generator 31 and an output from other M-series generator 32 is formed, thus simultaneously obtaining a plurality of Gold code series.

Abstract: In a multi-station transmission method and receiver using training signals, a forward signal is transformed in a signal transformation part to two pseudo-orthogonal transmission signal sequences, which are framed in base stations of two adjacent zones and augmented with orthogonal training signals, thereafter being transmitted over the same channels. A signal received by a receiver of a mobile station is separated, by a signal separation part using the training signals corresponding to the respective base stations, into signal sequences received from the respective base stations. The received signal sequences are subjected to an inverse transformation by inverse transformation circuits to obtain two transmitted signal sequences, and one of these signal sequences which has a larger metric is selectively outputted.

Abstract: A receiver directs the center of the main beam of the antenna directivity response in a desired direction by passing signals received by n antenna elements 1a to 1d through a phase shifter 3. An output from the phase shifter 3 is passed through a receiving filter 5 and is then amplified by a low noise amplifier 6 to be delivered as an output. The phase shifter 3 is confined together with the receiving filter 5 and the amplifier 6 in a cryostat 8, and the phase shifter 3 as well as the receiving filter 5 and the amplifier 6 are cooled down by cooling means 9 through a cold stage 9a, whereby the thermal noises generated therein are reduced to a minimum.

Abstract: A mobile communication system can implement broadcasting control that generates broadcast information autonomously in a distributed manner, thereby obviating the need for an RNC (Radio Network Controller). Each base station has an IP address and a base station multicast address. Each base station sends its own system information to all base stations using the multicast address. Each base station generates its broadcast information from its own system information and the system information received from other base stations. Thus, it can generate the broadcast information autonomously in a distributed manner without using the RNC.

Abstract: Disclosed is a mobile communication system including a network constituted of at least one switching center and a plurality of base stations, and a mobile station which communicates with the base stations simultaneously. The system permits varying transmission delay between the switching center and the base stations according to the type of services available to the mobile station. The object of the present invention is to propose a communication which permits varying transmission delay according to the type of service currently employed, and to promptly recover a synchronization state even if an out-of-sync state happens. To attain the object, a memory means (mobile switching center processor 32) stores transmission delay characteristics corresponding to services which are available to the mobile station.

Abstract: A system with a mobile phone capable of receiving a paging message. A method and apparatus automatically transmits a callback message to a callback number associated with the caller in response to a page message. The user of the system prepares a data structure in which a caller ID of each of the prospective callers in associated with information on the caller as well as the caller's communication device. In response to the reception of a page message, the user can display a response message used for calling back the caller when the user is busy. When the user selects the response message, the call back message is compiled using a call back number associated with a caller ID contained in the page message. The callback message can then be sent to the caller.

Abstract: A decision is made as to whether a radio base station acting as an interference source is present in a macrocell or microcell, so that the interference from a mobile station transmitting high power can be presented in advance. The base station inserts its transmission power value of a forward broadcast channel into broadcast information. A newly installed base station C, receiving a forward frequency band, measures the received level of the broadcast channel, and captures the transmission power value. When the transmission power value is large, the threshold value is reduced (THRb), and when the transmission power value is small, the threshold value is increased (THRa). If the received level L is less than the threshold value, a decision is made that the channel is available.