摘要:
A transmission power control method, a transmitting and receiving apparatus, a base station and a mobile station can lower a transmission power of a counterpart station with assuring a communication quality, such as a desired bit error ratio, block error ratio and so forth by setting a control reference value to be used for generation of as control instruction controlling the transmission power of the counterpart station in a closed loop type transmission power control, when an error correction coding and interleaving are used together. The transmission power control method includes step of receiving a signal transmitted from a communication counterpart station, step of measuring a reception quality value of each received time slot, control instruction determining step of periodically determining a control instruction depending upon the reception quality values of the plurality of slots and transmission step of transmitting the control instruction to the counterpart station, whereby the control instruction being used for transmission power control of the counterpart station.
摘要:
An apparatus and method for enabling the transport of a higher line rate time-multiplexed data signals (e.g., Ethernet at 10 Gb/s) at a lower line rate (e.g., SONET OC-192) and for regenerating the higher line rate time-multiplexed data signals at the receiving end. At a transmitter end, a data stream compression apparatus removes a predetermined portion of non-unique, invariant content of the higher line rate data stream thereby generating the lower line rate data stream which is transmitted over a communication link to the receiver end. At the receiver end, a data stream expansion apparatus adds back the missing predetermined portion of non-unique, invariant content to the lower line rate data stream thereby regenerating the higher line rate data stream. A data compression multiplexer apparatus is formed by combining a plurality of the data stream compression apparatuses with a data multiplexer. A data expansion demultiplexer apparatus is formed by combining a data demultiplexer with a plurality of the data stream expansion apparatuses.
摘要:
A highly flexible and scalable architecture implements TDM bridge and related functions for network to telecom interface applications like voice over Internet. A very small packet size minimizes packetization delay so that VOIP can be realized without expensive echo cancellation. High density enables processing 4K simultaneous voice channels in real time on a single, compact circuit board.
摘要:
A method for operating a mobile station that includes the steps of, prior to transmitting a burst in a last frame before entering a discontinuous transmission (DTX) mode, generating a message word that indicates that the mobile station is about to enter the DTX mode; using a predetermined generator polynomial to produce an error detection word from the message word; and combining the message word and the error detection word into a DTX Trailer word. The method further includes the steps of convolutionally encoding the DTX Trailer word; interleaving the DTX Trailer word with unused bits of a slot containing a speech or a signalling word; and transmitting the interleaved DTX Trailer word to a base station. In a presently preferred embodiment the message word has a length of eight bits, the error detection word is an eight bit CRC that is appended to the message word to form the DTX Trailer word, and the DTX Trailer word is error protected using a rate null convolutional encoder. The mobile station may periodically combine a Comfort Noise Parameter message with a MAHO-related Channel Quality Measurement message and transmit the combined messages to the base station while in the DTX_Low state.
摘要:
Transmitting apparatus 101 performs transmission processing on a general timeslot, while transmitting sub-data using a sub-timeslot for communication quality improvement. When a receiving process is failed on the general timeslot, receiving apparatus 102 receives the sub-timeslot, combines a received result on the sub-timeslot with the received result on the general timeslot to re-decode, and thereby reduces reception errors. Examples used as the sub-data are data deleted by puncture processing in transmission-coding and data of a bit that is known already to obviously have a poor received characteristic in using an M-ary modulation, etc.
摘要:
In a multi-carrier communication system wherein data are transferred bi-directionally in a time division duplexed way, a first pilot carrier is used to transfer a sample rate between two transceivers (VDSL_LT, VDSL_NT) and a second pilot carrier is used to transfer a time division duplexing frame rate between the two transceivers (VDSL_LT, VDSL_NT). The first pilot carrier has an instantaneous frequency that is a fraction of the sample rate of the first transceiver (VDSL_LT) and is orthogonal to other carriers used in the multi-carrier communication system. The second pilot carrier has a mean frequency that is a fraction of the time division duplexing frame rate and is also orthogonal to the other carriers used in the multi-carrier communication system. The second pilot carrier is different from the first pilot carrier.
摘要:
Disclosed is a system and method that provides rate controlled insertion of asynchronous data into a synchronous stream in a broadcast system. A calculation of the transmission time for an asynchronous data file is determined from the file size, available data transfer rate, redundancy transmission factor, bandwidth scale factor and connect time latency. Transmission time may be employed to schedule transmission of asynchronous data for use at a predetermined time. Transmission time for multiple files may be combined to determine a transmission start time for a first file such that a last asynchronous file is transmitted by a predetermined time.
摘要:
A method for defining measurement gaps in a wireless telecommunications system comprising at least one base station and several wireless terminals. The telecommunications system comprises means for defining measurement patterns for terminals, which measurement patterns set locations of gaps used for measurements in a time-slot frame, and the base station comprises a transmitter for transmitting the measurement patterns to the corresponding terminals. In the method, measurement patterns are defined for the terminals, setting the locations of the gaps used for measurements in a time-slot frame, the measurement patterns are transmitted through the base station to the corresponding terminals and various delays are defined for the measurement patterns of the terminals so that the gaps of different terminals are in substantially different locations in the time-slot frame.
摘要:
A mechanism for notifying a mobile station of receipt of a packet-switched paging message in a GSM communication system. A base station controller (108) sends the packet-switched paging message to the mobile station (116) along a main dedicated control channel in response to the mobile station being capable of operating in a dual transfer mode and being currently engaged in circuit-switch voice interchange activity, resulting in a simultaneous voice and data transmission in dual transfer mode.
摘要:
The invention relates to a method for the transmission of a global pilot signal from a base station of a radio communication system to a user station and a base station suitable for carrying out the above method. The base station comprises a number of antennae each with a characteristic pilot bit sequence. The global pilot signal is generated by overlaying the pilot bit sequences emitted from the several antennae of the base station, whereby the following method steps are carried out: a) division of the several antennae into a first group and a second group each with at least one antenna, b) transmission of the pilot bit sequences of the antennae of just the first group and c) modification of the compositions of the first and second group and return to step b).