Abstract: A transmission apparatus for transmitting data has a table that includes a plurality of constellation versions for a 64 QAM modulation scheme. Each of the constellation versions defines at least one of (i) bit positions in a bit sequence and (ii) logical values of bits of the bit sequence. A transmission section transmits data using one of the constellation versions based on the table.

Abstract: A hybrid ARQ retransmission method involves encoding data packets with a forward error correction (FEC) technique prior to transmission. The data packets are re-transmitted based on an automatic repeat request (ARQ) and subsequently soft-combined with previously received erroneous data packets either on a symbol-by-symbol or a bit-by-bit basis. The symbols of the erroneous data packets are modulated by employing a first signal constellation. The symbols of the re-transmitted data packets are modulated by employing at least a second signal constellation. Each symbol bit has a mean bit reliability defined by the individual bit reliabilities over all symbols of the predetermined signal constellation. The first constellation and the at least second signal constellation are selected such that the combined mean bit reliabilities for the respective bits of all transmissions are averaged out.

Abstract: A data transmitting device for transmitting data on a channel within a CDMA system may simultaneously convey data with a plurality of other data transmitting devices on one channel. The data transmitting device includes an interleaver that receives an interleaver pattern parameter, generates a respective interleaver pattern in accordance with the received parameter, and interleaves a source data stream using the generated interleaver pattern to produce an interleaved data stream. The generated interleaver pattern has interleaver characteristics that differ from the interleaver characteristics of at least one other data transmitting device that simultaneously transmits data on the channel.

Abstract: The present invention relates to a method for scheduling data retransmissions, a method for use in a data retransmission scheme and a method for updating a soft buffer of a base station in a mobile communication system during a soft-handover. The present invention relates to a base station executing the controlling and updating method, a communication terminal for executing the scheduling method and to a mobile communication system comprising at least one the base station and communication terminal. To prevent erroneous combining of data packets in a packet retransmission scheme at the receiver, the present invention provides a method that may flush the soft buffer region associated to a received data packet upon its correct reception. Further, a method is provided that monitors the time elapsed since the last storing of a data packet in a buffer region of a base station to be able to trigger the flush of the buffer region upon expiry of a threshold time period.

Abstract: A method of retransmission protocol reset synchronisation in a radio network of a communication system, said radio network including at least one radio network controller RNC for controlling a plurality of base stations in communication with mobile terminals, wherein the RNC communicates with a communication terminal using a radio link control RLC procedure and the plurality of base stations communicate with the mobile terminals using a medium access control MAC procedure, comprising the steps of initiating a RLC reset procedure upon occurrence of an unrecoverable protocol error and initiating a MAC reset procedure in response to a RLC reset procedure.

Abstract: An ARQ (re-) transmission method of transmitting data in a wireless communication system wherein data packets are transmitted from a transmitter to a receiver, using a first transmission and a second transmission based on a repeat request. The method comprises the steps of modulating data at the transmitter using a first signal constellation pattern to obtain a first data symbol. The first data symbol is transmitted as the first transmission to the receiver using a first diversity branch. Further, the data is modulated at the transmitter using a second signal constellation pattern to obtain a second data symbol. Then, the second data symbol is transmitted as the second transmission to the receive over a second diversity branch. Finally, the received first and second data symbol data symbol are diversity combined at the receiver. The invention further relates to a transmitter and a receiver embodied to carry out the method of the invention.

Abstract: A method of transmitting data in a wireless communication system from a transmitter to a receiver, comprising the steps of modulating data at the transmitter using a first signal constellation pattern to obtain a first data symbol. The first data symbol is transmitted to the receiver using a first diversity branch. Further, the data is modulated at the transmitter using a second signal constellation pattern to obtain a second data symbol. Then, the second data symbol is transmitted to the receiver over a second diversity path. Finally, the received first and second data symbol are diversity combined at the receiver. The invention further relates to a transmitter and a receiver embodied to carry out the method of the invention.

Abstract: The invention provides a hybrid ARQ technique for transmitting a data unit on a radio channel in a communication system to a receiver. After encoding the data unit into a sequence of code words using an encoding parameter, a first code word is transmitted, and an ACK or NAK is received from the receiver. If a NAK is received, the next code word of the sequence is transmitted. According to the invention, a measurement value indicating the current channel conditions is determined by counting the NAK messages and/or evaluating the encoding parameters. Preferably the measurement values are the overall coding rate, the average number of retransmissions per data unit, and the average number of retransmissions per code word. In the preferred embodiment, the transmitter comprises a NAK counter. Besides the improved transmission measurement, the present invention provides using this measurement for adaptation purposes.

Abstract: The present invention relates to a method for controlling a radio cell change of a communication terminal from a first radio cell to a second radio cell, wherein the first and the second radio cell is controlled by at least one base station of a mobile communication system. The present invention further provides a base station and a communication system comprising a plurality of base stations and a communication terminal adapted to execute the control method. To overcome negative impacts of data loss and delay during a cell change procedure the protocol context of a retransmission protocols are transferred from a source base station to a target base station upon an cell change of a communication terminal in issue.

Abstract: An ARQ (re-) transmission method of transmitting data in a wireless communication system wherein data packets are transmitted from a transmitter to a receiver, using a first transmission and a second transmission based on a repeat request. The method comprises the steps of modulating data at the transmitter using a first signal constellation pattern to obtain a first data symbol. The first data symbol is transmitted as the first transmission to the receiver using a first diversity branch. Further, the data is modulated at the transmitter using a second signal constellation pattern to obtain a second data symbol. Then, the second data symbol is transmitted as the second transmission to the receive over a second diversity branch. Finally, the received first and second data symbol data symbol are diversity combined at the receiver. The invention further relates to a transmitter and a receiver embodied to carry out the method of the invention.

Abstract: A method of transmitting data in a wireless communication system from a transmitter to a receiver, comprising the steps of modulating data at the transmitter using a first signal constellation pattern to obtain a first data symbol. The first data symbol is transmitteds to the receiver using a first diversity branch. Further, the data is modulated at the transmitter using a second signal constellation pattern to obtain a second data symbol. Then, the second data symbol is transmitted to the receiver over a second diversity path. Finally, the received first and second data symbol are diversity combined at the receiver. The invention further relates to a transmitter and a receiver embodies to carry out the method of invention.

Abstract: A data communication apparatus, a data receiving apparatus, a data transmitting apparatus and a retransmission control method wherein the transmission efficiency is improved. The data communication apparatus includes an error rate determining part (120) and an ACK/NACK generating part (122). The error rate determining part (120) determines the packet error rate of received packet data. The ACK/NACK generating part (122) compares the determined packet error rate with a desired packet error rate that is a target value. As a result of the comparison, if the determined packet error rate is lower than the desired packet error rate, the ACK/NACK generating part (122) generates an ACK signal as a process of avoiding any data retransmission.

Abstract: The method according to the present invention provides synchronization in a heterogeneous mobile network, for the purpose of interoperability, of a wireless local area network, in which a medium is reserved for a certain service or user in radio channel reservation periods (702) of variable duration, to a radio access network, transmitting data in transmission time intervals of pre-defined duration (603). The variable duration of a radio channel reservation period (702) is defined such that it ends by a pre-defined time period (609) before the end of a transmission time interval (603). The method may be implemented in an access point (1400) of a heterogeneous network as well as in a mobile station (1500).

Abstract: The present invention relates to a method and mobile terminal for requesting resources for transmitting data on uplink within a mobile communication system. Further the invention relates to a network entity for allocating uplink resources to mobile terminal. To provide a flexible scheduling scheme for uplink transmission, the invention proposes different scheduling procedures based on a request grant scheme. The resource request of the mobile terminal is provided via a contention-based channel, while all further communication uses scheduled resources. Consequently subsequent transmissions of user data and/or scheduling information utilize scheduled resources.

Abstract: A wireless communication terminal apparatus and a CQI selecting method wherein when CQIs are grouped according to their levels and then an upper-order CQI, which is indicative of a group, is to be informed in a longer period, while a lower-order CQI, which identifies a CQI in the group, being to be informed in a shorter period, the CQI is precisely selected. A reception SIR range of 0-4 dB in UE corresponds to a level 1 of upper-order CQI. A next reception SIR range of 4-8 dB corresponds to a level 2 of upper-order CQI. Similarly, the following SIR ranges up to 24 dB, each of which is 4 dB higher than a respective previous one, correspond to the respective following levels of upper-order CQI. On the other hand, the levels 1-4 of lower-order CQI, with which the level 1 of upper-order CQI is associated, correspond to a SIR range of ?1-5 dB. The levels 1-4 of lower-order CQI, with which the level 2 of upper-order CQI is associated, correspond to a SIR range of 2-9 dB.

Abstract: Mobile stations, base stations, radio network controllers and communication systems perform according to the hybrid automatic repeat request (HARQ) protocol for transmitting data packets from a transmitting entity to a receiving entity via a data channel. A HARQ method sending synchronous retransmissions involves a feedback message received from the receiving entity at the transmitting entity and, in case the feedback message indicates that the data packet has not been received successfully, a retransmission data packet is transmitted to the receiving entity after a predetermined time span upon having received the feedback message. The receiving entity soft combines the retransmission data packet with the previously received data packet.

Abstract: The present invention relates to a method for controlling a radio cell change of a communication terminal from a first radio cell to a second radio cell, wherein the first and the second radio cell is controlled by at least one base station of a mobile communication system. The present invention further provides a base station and a communication system comprising a plurality of base stations and a communication terminal adapted to execute the control method. To overcome negative impacts of data loss and delay during a cell change procedure the protocol context of a retransmission protocols are transferred from a source base station to a target base station upon an cell change of a communication terminal in issue.

Abstract: A hybrid ARQ retransmission method in a communication system, wherein data packets consisting of symbols encoded with a forward error correction (FEC) technique prior to transmission are retransmitted based on an automatic repeat request and subsequently combined with previously received data packets the symbols of said data packets being modulated by a mapping unit employing a predetermined signal constellation. The retransmitted data packets being retransmitted in form of a selected one of a plurality of different redundancy versions. According to the invention the transmitted bits of the modulated symbols are reordered over the retransmissions in accordance with the selected redundancy version.

Abstract: An ARQ retransmission method in a communication system, wherein data packets comprising modulation symbols are retransmitted based on an automatic repeat request and subsequently combined with previously received data packets, the symbols of said data packets being modulated by a mapping unit employing a predetermined signal constellation. The retransmitted data packets being retransmitted in form of a selected one of a plurality of different redundancy versions. According to the invention, the bits to be transmitted are reordered prior to modulation over the retransmissions in accordance with the selected redundancy version.

Abstract: The invention concerns a method of managing a plurality of parallel hybrid ARQ processes including at least one of a reserved and/or additional HARQ process comprising the step of scheduling the available HARQ processes for transmission in accordance with at least one resource allocation parameter. Furthermore, the invention discloses a method of a plurality of hybrid HARQ processes including at least one of a reserved and/or additional HARQ process in a mobile communication system, wherein data flows are transmitted from a transmitter to a receiver comprising the steps of scheduling a number of transmission time intervals (TTI) in advance for a plurality of HARQ processes for transmission to the receiver, the step of predicting the channel conditions for the transmitted HARQ processes over at least one of the scheduled TTI and the step of assigning HARQ processes for transmission in accordance with the predicted channel conditions.