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    • 1. 发明授权
    • Method for triggering retransmission in a multicast system and apparatus implementing the method
    • 用于在多播系统中触发重传的方法和实现该方法的装置
    • US08667356B2
    • 2014-03-04
    • US12674287
    • 2007-08-20
    • Yonggang WangBernd HaberlandPingping XingBijun Zhang
    • Yonggang WangBernd HaberlandPingping XingBijun Zhang
    • H04L1/18
    • G08C25/02H04L1/0021H04L1/1825H04L1/1838H04L2001/0093
    • Disclosed is a method for triggering retransmission in a multicast system, including a base station eNB setting a retransmission condition based on a channel state indication and transmitting the set retransmission condition to a user equipment UE; and the UE comparing the current channel state indication of the UE with the received retransmission condition when receiving an error block, and feeding back a NACK signaling to the eNB trigger a retransmission when the retransmission condition is satisfied. The method according to the present invention is to restrict the trigger of the NACK signaling, by setting the condition of the UE feeding back the NACK signaling when the UE received the error block. Then the feedback signaling on the uplink channel would be restricted, and the retransmission probability would be limited in an appropriate region as in Rel 6 HSDPA, therefore the optimal ratio of efficiency over power would be achieved. Consequently, the number of NACK signaling is restricted so as to avoid the uplink overload. Meanwhile, the retransmission probability is limited so that the optimal ratio of efficiency over power may be achieved.
    • 本发明公开了一种在组播系统中触发重传的方法,包括基站eNB基于信道状态指示设定重传条件,并将设置的重传条件发送给用户设备UE; 并且UE在接收到错误块时将UE的当前信道状态指示与接收到的重传条件进行比较,并且当满足重新发送条件时,向eNB发送NACK信令则触发重发。 根据本发明的方法是通过在UE接收到错误块时设置UE反馈NACK信令的条件来限制NACK信令的触发。 那么上行链路信道上的反馈信令将受到限制,重传概率将会在Rel 6 HSDPA的适当区域受到限制,因此可以实现功率效率的最佳比例。 因此,限制了NACK信令的数量,以避免上行链路过载。 同时,重传概率受到限制,使得可以实现效率超过功率的最佳比率。
    • 6. 发明申请
    • GATEWAY, BASE STATION, COMMUNICATION NETWORK AND SYNCHRONIZATION METHOD THEREOF
    • 网关,基站,通信网络及其同步方法
    • US20110268018A1
    • 2011-11-03
    • US12438110
    • 2007-08-22
    • He WangZhongji HuYonggang WangHua ZhaoYu ChenPingping Xing
    • He WangZhongji HuYonggang WangHua ZhaoYu ChenPingping Xing
    • H04W56/00
    • H04W56/002H04J3/0667H04W4/06H04W88/08H04W88/16H04W92/045H04W92/12
    • Discloses is a gateway, base station, communication network and synchronization method thereof. The method comprises: at time T1, sending from the gateway to the base stations a synchronization request signal; at time T2, receiving by the base stations the synchronization request signal; at time T3, sending from the base stations to the gateway the synchronization response comprising the times T2 and T3; at time T4, receiving by the gateway the synchronization response signals; and calculating for the base stations a mapping relationship between the time system of the gateway and the time system of the base station is calculated based on the times T1, T2, T3 and T4. With the configuration and method proposed in present invention, it can be avoided the problem that accurate synchronization between the gateway and the base stations can not be reached for MBMS data packets in LTE because of path delay and jitter error, so that every base station can specify the same transmitting time for MBMS data packets to guarantee that UE could implement correct RF combining.
    • 公开了一种网关,基站,通信网络及其同步方法。 该方法包括:在时间T1,从网关向基站发送同步请求信号; 在时间T2,由基站接收同步请求信号; 在时间T3,从基站向网关发送包括时间T2和T3的同步响应; 在时间T4,由网关接收同步响应信号; 并且基于时间T1,T2,T3和T4计算基站的时间系统与基站的时间系统之间的映射关系。 利用本发明提出的配置和方法,可以避免由于路径延迟和抖动误差而导致LTE中的MBMS数据分组无法达到网关与基站之间的准确同步的问题,从而每个基站可以 为MBMS数据包指定相同的发送时间,以保证UE可以实现正确的RF组合。
    • 7. 发明申请
    • METHOD FOR TRIGGERING RETRANSMISSION IN A MULTICAST SYSTEM AND APPARATUS IMPLEMENTING THE METHOD
    • 用于在多播系统中触发恢复的方法和实现该方法的装置
    • US20110219281A1
    • 2011-09-08
    • US12674287
    • 2007-08-20
    • Yonggang WangBemd HaberlandPingping XingBijun Zhang
    • Yonggang WangBemd HaberlandPingping XingBijun Zhang
    • H04L1/18G06F11/14
    • G08C25/02H04L1/0021H04L1/1825H04L1/1838H04L2001/0093
    • Disclosed is a method for triggering retransmission in a multicast system, comprising steps of: a base station eNB setting a retransmission condition based on a channel state indication and transmitting the set retransmission condition to a user equipment UE; and the UE comparing the current channel state indication of the UE with the received retransmission condition when receiving an error block, and feeding back a NACK signaling to the eNB trigger a retransmission when the retransmission condition is satisfied. The method according to the present invention is to restrict the trigger of the NACK signaling, by setting the condition of the UE feeding back the NACK signaling when the UE received the error block. Then the feedback signaling on the uplink channel would be restricted, and the retransmission probability would be limited in an appropriate region as in Rel 6 HSDPA, therefore the optimal ratio of efficiency over power would be achieved. Consequently, the number of NACK signaling is restricted so as to avoid the uplink overload. Meanwhile, the retransmission probability is limited so that the optimal ratio of efficiency over power may be achieved.
    • 本发明公开了一种在组播系统中触发重传的方法,包括以下步骤:基站eNB根据信道状态指示设定重传条件,并向所述用户设备UE发送所述重传条件; 并且UE在接收到错误块时将UE的当前信道状态指示与接收到的重传条件进行比较,并且当满足重新发送条件时,向eNB发送NACK信令则触发重发。 根据本发明的方法是通过在UE接收到错误块时设置UE反馈NACK信令的条件来限制NACK信令的触发。 那么上行链路信道上的反馈信令将受到限制,重传概率将会在Rel 6 HSDPA中适当的区域受到限制,因此可以实现功率效率的最佳比例。 因此,限制了NACK信令的数量,以避免上行链路过载。 同时,重传概率受到限制,使得可以实现效率超过功率的最佳比率。