DOWNLINK MESSAGES USING REPEATED TRANSMISSION

    公开(公告)号:EP3389326A1

    公开(公告)日:2018-10-17

    申请号:EP18175066.2

    申请日:2014-11-13

    申请人: Sony Corporation

    IPC分类号: H04W72/04

    摘要: A wireless telecommunication system comprises a base station arranged to communicate messages to one or more terminal devices over a radio interface. The radio interface has a radio frame structure comprising a plurality of subframes, wherein a message may be transmitted in accordance with a first transmission scheme using transmission resources in a first number of radio subframes (e.g. one subframe) or transmitted in accordance with a second transmission scheme using transmission resources in a second number of radio subframes (e.g. with repeat transmissions in a plurality of subframes). The message is transmitted in association with an identifier to indicate a terminal device to which the message is addressed. A characteristic for the identifier, for example a value or control region search space for the identifier, is dependent on whether the message is to be transmitted in accordance with the first transmission scheme or the second transmission scheme. A terminal device to which the message is addressed determines the transmission scheme from the characteristic of the identifier and receives the message accordingly.

    METHOD, DEVICE AND SYSTEM FOR DETERMINING AND ADJUSTING MODULATION FORMAT AND CARRIER POWER

    公开(公告)号:EP3154296B1

    公开(公告)日:2018-10-03

    申请号:EP14896121.2

    申请日:2014-06-26

    摘要: A modulation format and carrier power determining method, a modulation format and carrier power adjusting method, a device, and a system are provided. A per-unit-power signal-to-noise ratio of each subcarrier of at least two subcarriers is determined by using a modulated signal; a bit error rate of each subcarrier of the at least two subcarriers is determined according to the signal-to-noise ratio and a preset correspondence between signal-to-noise ratios and bit error rates, to obtain subcarrier bit error rates; a modulation format in which a to-be-modulated signal is modulated onto each subcarrier of the at least two subcarriers is determined according to the subcarrier bit error rates; a system bit error rate of a multi-carrier communications system is determined according to the subcarrier bit error rates; and a carrier power of each subcarrier of the at least two subcarriers is determined according to the system bit error rate. By using the foregoing method, the device, and the system, actual performance of a multi-carrier communications system can be reflected in a relatively accurate way.

    ENCODING BASED ON DATA PACKET DELAY PROBABILITY

    公开(公告)号:EP3062456B1

    公开(公告)日:2018-09-05

    申请号:EP14856130.1

    申请日:2014-10-21

    申请人: NEC Corporation

    摘要: A communication system is provided with a transmission terminal and a reception terminal that communicate over a network, and the transmission terminal includes: an encoded packet generation unit which encodes a predetermined number of packets and transmits the encoded packets to the reception terminal over the network; a network environment measurement unit which measures the state of the network; and a parameter calculation unit which determines the predetermined number of packets by using a characteristics to be guaranteed in regard to delay time required for a packet transmitted from the transmission terminal to arrive at the reception terminal and the state of the network. In the communication system in which the transmission terminal and the reception terminal communicate via the network on which a packet loss may occur, a characteristic regarding a packet delay time specified by a user is guaranteed.

    DATA TRANSMISSION APPARATUS AND METHOD
    7.
    发明授权
    DATA TRANSMISSION APPARATUS AND METHOD 有权
    数据传输装置和方法

    公开(公告)号:EP3076724B1

    公开(公告)日:2018-04-18

    申请号:EP13899585.7

    申请日:2013-12-17

    发明人: LIU, Pei

    摘要: Embodiments of the present invention provide a data transmission apparatus and method. The data transmission apparatus in the present invention includes: a preprocessing module, configured to, if data is received within a preset period of time, record a link quality indication value LQI corresponding to the data, and perform incremental processing by adding 1 to a count value, where the count value is used to count a quantity of pieces of received data; a processing module, configured to, if it is learned by means of comparison that the count value is not less than a quantity N of pieces of data allowed to be transmitted in a current period, calculate an average value LQI of link quality indication values corresponding to all data received within the current period, where the processing module is further configured to compare the average value LQI with a threshold to determine a quantity of pieces of data allowed to be transmitted in a next period; and a reply module, configured to reply with a periodicity acknowledgment frame, where the periodicity acknowledgment frame carries the quantity of pieces of data allowed to be transmitted in the next period. In the embodiments of the present invention, the quantity of pieces of data allowed to be transmitted in the next period can be adaptively adjusted to form a real-time channel detection mechanism.