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    • 2. 发明申请
    • A FREQUENCY SYNCHRONIZATION METHOD FOR NODES IN A DOWNLINK COORDINATED MULTIPLE POINT TRANSMISSION SCENARIO
    • 下行协调多点传输场景中的节点频率同步方法
    • WO2013110226A1
    • 2013-08-01
    • PCT/CN2012/078677
    • 2012-07-16
    • TELEFONAKTIEBOLAGET L M ERICSSON(PUBL)GUO, ZhihengLI, ShaohuaLIU, JinhuaZHANG, Zhan
    • GUO, ZhihengLI, ShaohuaLIU, JinhuaZHANG, Zhan
    • H04W56/00
    • H04W56/0015H04J1/06H04J3/0617H04L5/0035H04W56/0035
    • Techniques are disclosed for synchronizing frequency among a cluster of coordinated transmission points cooperating in a coherent joint transmission. In some embodiments, one transmission point is set (510) as a reference transmission point for a group of coordinated transmission points. Each of one or more other transmission points in the group receives (530) a specified downlink reference signal from the reference transmission point, measures (540) its frequency offset relative to the reference point, and compensates (550) the frequency offset in baseband processing or by a radio adjustment. Which transmission point acts as the reference transmission point is statically defined, in some embodiments, or dynamically configured, in others. Likewise, which time‐frequency resources are used for the reference signal may be statically defined or dynamically configured. In some embodiments, information identifying the reference transmission point and/or specifying the radio resource locations and durations of the reference signal is distributed to the synchronizing transmission points. (Figure 5)
    • 公开了用于在协调传输点协作的一组协调传输点中使频率同步的技术。 在一些实施例中,一个传输点被设置为(510)作为一组协调传输点的参考传输点。 组中的一个或多个其他传输点中的每一个从参考传输点接收(530)指定的下行链路参考信号,测量(540)相对于参考点的频率偏移,并补偿(550)基带处理中的频率偏移 或通过无线电调整。 作为参考传送点的哪个传输点在一些实施例中被静态地定义,或者在另一些实施例中被动态配置。 同样地,用于参考信号的哪些时间频率资源可以被静态地定义或动态配置。 在一些实施例中,识别参考传输点和/或指定参考信号的无线电资源位置和持续时间的信息被分配给同步传输点。 (图5)
    • 5. 发明申请
    • METHOD AND APPARATUS FOR RADIO LINK ADAPTATION FOR FLEXIBLE SUBFRAME COMMUNICATIONS
    • 用于灵活子帧通信的无线链路适配的方法和装置
    • WO2014047773A1
    • 2014-04-03
    • PCT/CN2012/081897
    • 2012-09-25
    • TELEFONAKTIEBOLAGET L M ERICSSON (PUBL)LIU, JinhuaQIAN, YuWANG, Hai
    • LIU, JinhuaQIAN, YuWANG, Hai
    • H04W76/04
    • H04L1/203H04L1/0019
    • The present disclosure relates to a method in a base station and to a base station for link adaption. The base station serves a UE and is configured to indicates a modulation and coding scheme and uplink radio resources for transmission by the UE of a succeeding flexible subframe. The base station receives an uplink transmission from the UE and demodulates one or more flexible subframes including perform error detection and determining an estimate of SINR. The base station determines if that flexible uplink subframe was affected by interference caused by a DL data payload transmission from a neighboring base station during that same flexible subframe. Based on that the decision, the base station determines and applies an adaptation value to the estimated SINR. It then selects a modulation and coding scheme or other transmission parameter(s), e.g., transmission bit rate, for a succeeding uplink transmission from the UE in the flexible uplink and provides it to the UE.
    • 本公开涉及基站中的方法和用于链路适配的基站。 基站服务于UE,并且被配置为指示用于由随后的灵活子帧发送的调制和编码方案和上行链路无线电资源。 基站从UE接收上行链路传输,并解调一个或多个灵活的子帧,包括执行错误检测和确定SINR的估计。 在同一灵活子帧期间,基站确定该灵活上行链路子帧是否受到来自相邻基站的DL数据有效负载传输引起的干扰的影响。 基于该决定,基站确定并将适应值应用于估计的SINR。 然后,它在柔性上行链路中从UE中选择调制和编码方案或其他传输参数,例如传输比特率,并将其提供给UE。
    • 8. 发明申请
    • METHODS RADIO NETWORK NODES AND USER EQUIPMENT FOR ALLEVIATING INTERFERENCE IN A RADIO COMMUNICATION NETWORK
    • 方法用于在无线电通信网络中进行干扰的无线网络节点和用户设备
    • WO2014139112A1
    • 2014-09-18
    • PCT/CN2013/072568
    • 2013-03-14
    • TELEFONAKTIEBOLAGET L M ERICSSON(PUBL)LIU, Jinhua
    • LIU, JinhuaKAZMI, Muhammad
    • H04W72/00
    • H04W72/085H04B7/2656H04W24/08H04W52/243H04W52/365H04W72/0413H04W72/0426H04W72/0446H04W72/082
    • Methods and radio network nodes (BS1, BS2) for alleviating interference on downlink radio signals in a victim User Equipment, UE (T1, T2), caused by uplink transmission from an aggressor UE (T2, T1). The interference occurs during a flexible subframe in which the direction of signal transmission is variable between uplink and downlink in different radio frames. A first radio network node (BS1) detects (4:1) that a first UE (T1) that is served by the first radio network node (BS1) is one of the victim and aggressor UEs. The first radio network node (BS1) identifies (4:2) a second radio network node (BS2) employing a subframe scheme such that uplink transmission from the aggressor UE may overlap at least partly with downlink reception in the victim UE during the flexible subframe. The first radio network node (BS1) sends (4:3) a notification to the second radio network node, indicating that the first UE is served by the first radio network node. The second radio network node (BS2) is thereby triggered to execute (4:5) an interference mitigation action for alleviating the interference when serving a second UE (T2) being the other one of the victim and aggressor UEs.
    • 用于减轻由来自侵略者UE(T2,T1)的上行链路传输引起的受害者用户设备UE(T1,T2)中的下行链路无线电信号的干扰的方法和无线电网络节点(BS1,BS2)。 干扰发生在灵活子帧中,其中信号传输的方向在不同无线电帧中的上行链路和下行链路之间是可变的。 第一无线电网络节点(BS1)检测(4:1)由第一无线电网络节点(BS1)服务的第一UE(T1)是受害者和侵略者UE之一。 第一无线电网络节点(BS1)标识(4:2)采用子帧方案的第二无线电网络节点(BS2),使得来自侵略者UE的上行链路传输可以在柔性子帧期间至少部分地与受害者UE中的下行链路接收重叠 。 第一无线电网络节点(BS1)向第二无线电网络节点发送(4:3)通知,指示第一UE由第一无线电网络节点服务。 因此,第二无线电网络节点(BS2)被触发以执行(4:5)用于在服务作为受害者和侵略者UE中的另一个的第二UE(T2)时减轻干扰的干扰减轻动作。
    • 9. 发明申请
    • METHODS AND NODES FOR MULTIPLE USER MIMO SCHEDULING
    • 多用户MIMO调度方法与方法
    • WO2014007707A1
    • 2014-01-09
    • PCT/SE2012/050795
    • 2012-07-06
    • TELEFONAKTIEBOLAGET L M ERICSSON (PUBL)FAN, RuiLIU, JinhuaLI, Chan
    • FAN, RuiLIU, JinhuaLI, Chan
    • H04L5/00
    • H04W72/1226H04B7/0413H04L5/0023H04L5/006H04W52/146H04W52/243
    • The present invention relates to an RBS of a wireless network and to a method in the RBS for MU-MIMO scheduling. The method comprises estimating (410) a throughput gain of a paired scheduling relative to an unpaired scheduling for a UE pair comprising a first UE and a second UE, and for each of the first and the second UEs individually. The method comprises when the UEs are initially unpaired, to schedule (420) the first UE in pair with the second UE when the estimated throughput gain for the UE pair is above a first threshold, and when the estimated throughput gain is positive for each of the first and second UEs. Furthermore, the method comprises when the first UE is initially paired with the second UE, to schedule (430) the first UE de-paired from the second UE when the estimated throughput gain for the UE pair is lower than a second threshold, or when the estimated throughput gain is negative for either the first or the second UE.
    • 本发明涉及无线网络的RBS和用于MU-MIMO调度的RBS中的方法。 该方法包括相对于包括第一UE和第二UE的UE对以及针对第一和第二UE中的每一个的非配对调度来估计(410)配对调度的吞吐量增益。 该方法包括当UE最初不配对时,当UE对的估计的吞吐量增益高于第一阈值时,以及当估计的吞吐量增益对于每个UE的估计吞吐量增益为正时,调度(420)第一UE与第二UE成对配对 第一和第二UE。 此外,所述方法包括当所述第一UE最初与所述第二UE配对时,当所述UE对的估计吞吐量增益低于第二阈值时,调度(430)所述第一UE与所述第二UE进行去配对,或者当 第一或第二UE的估计吞吐量增益为负。