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    • 1. 发明申请
    • Uplink interference cancellation
    • 上行干扰消除
    • US20060050662A1
    • 2006-03-09
    • US11159345
    • 2005-06-23
    • Khurram RizviYuk ChowTomoya Horiguchi
    • Khurram RizviYuk ChowTomoya Horiguchi
    • H04B7/216
    • H04J13/0003H04B1/7105H04J13/0044
    • The present invention relates to wireless communication between a mobile terminal and a base station, and the use of interference cancellation in the uplink. The present invention is particularly but not exclusively concerned with 3G or UTRAN applications. In general terms the present invention provides a method of improving the performance of a CDMA based wireless network, such as a 3G cellular network for example. Interference cancellation is effectively performed earlier by using the channel request such as a reservation packet from a mobile terminal to estimate interference from that mobile on existing mobile users and interference on the mobile from existing mobile users, by determining the relative transmission timing of the new mobiles channel request compared with the transmission timings of the existing mobiles. This allows the base station to determine the cross-correlation between the codes already assigned to the existing users and the code to be allocated to the new user in order to determine an interference measure. This interference can then be cancelled from the new mobile when its data packets are received.
    • 本发明涉及移动终端与基站之间的无线通信,以及在上行链路中使用干扰消除。 本发明特别但不排他地涉及3G或UTRAN应用。 一般来说,本发明提供了一种改进例如3G蜂窝网络的基于CDMA的无线网络的性能的方法。 通过使用诸如来自移动终端的预留分组的信道请求,通过确定新移动台的相对传输定时来早期有效地执行干扰消除,以通过确定来自现有移动用户的来自该移动的现有移动用户的干扰和对现有移动用户对移动台的干扰 信道请求与现有手机的传输定时相比。 这允许基站确定已经分配给现有用户的代码与要分配给新用户的代码之间的互相关,以便确定干扰措施。 然后,当其接收到数据分组时,可以从新的移动台取消该干扰。
    • 2. 发明申请
    • Wireless communications system
    • 无线通信系统
    • US20070036123A1
    • 2007-02-15
    • US11414382
    • 2006-05-01
    • Simon ArmourKhurram RizviDharmayashdev Basgeet
    • Simon ArmourKhurram RizviDharmayashdev Basgeet
    • H04B7/208
    • H04W16/30H04B7/2606H04L5/0007H04W16/26H04W72/082H04W88/04
    • A communication network comprises at least a first region serviced by a base station. This region also comprises a plurality of bridging stations deployed around the base station, so defining a circumference around it. Each bridging station comprises one or more directional antennas operable to generate a coverage area lying predominantly outside said circumference. The effect is to form, in operation, an outer zone predominantly outside said circumference serviced by said bridging stations, and an inner zone within said circumference serviced by said base station. For communications with the outer zone, said base station is operable to assign duplicate OFDMA sub-channels to mobile stations in respective areas of the outer zone served by bridging stations that experience sufficiently low levels of cross-interference from each other's communications.
    • 通信网络至少包括由基站服务的第一区域。 该区域还包括围绕基站部署的多个桥接站,因此限定围绕它的圆周。 每个桥接站包括一个或多个定向天线,其可操作以产生主要位于所述圆周外的覆盖区域。 效果是在操作中形成主要在由所述桥接站服务的所述圆周外部的外部区域以及由所述基站服务的所述圆周内的内部区域。 为了与外部区域进行通信,所述基站可操作以将重复的OFDMA子信道分配给由经历来自彼此通信的足够低的交叉干扰水平的桥接站服务的外部区域的相应区域中的移动站。
    • 4. 发明申请
    • Wireless communications system
    • 无线通信系统
    • US20060280147A1
    • 2006-12-14
    • US11412942
    • 2006-04-28
    • Khurram RizviYuk ChowDharmayashdev Basgeet
    • Khurram RizviYuk ChowDharmayashdev Basgeet
    • H04B7/216
    • H04W16/12H04W16/32
    • A communication network comprises at least a first region serviced by a base station. This region also comprises a plurality of bridging stations deployed around the base station, so defining a circumference around it. Each bridging station comprises one or more directional antennas operable to generate a coverage area lying predominantly outside said circumference. The effect is to form, in operation, an outer zone predominantly outside said circumference serviced by said bridging stations, and an inner zone within said circumference serviced by said base station. For communications with the outer zone, said base station is operable to assign duplicate CDMA spreading codes to mobile stations in respective areas of the outer zone served by bridging stations that experience sufficiently low levels of cross-interference from each other's communications.
    • 通信网络至少包括由基站服务的第一区域。 该区域还包括围绕基站部署的多个桥接站,因此限定围绕它的圆周。 每个桥接站包括一个或多个定向天线,其可操作以产生主要位于所述圆周外的覆盖区域。 效果是在操作中形成主要在由所述桥接站服务的所述圆周外部的外部区域以及由所述基站服务的所述圆周内的内部区域。 为了与外部区域进行通信,所述基站可操作以将复制的CDMA扩展码分配给由经历来自彼此通信的足够低的交叉干扰水平的桥接站服务的外部区域的相应区域中的移动站。