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    • 51. 发明授权
    • Cell selection scheme in CDMA mobile communication system using spread
codes and spread code phases
    • CDMA移动通信系统中使用扩频码和扩展码阶段的小区选择方案
    • US5953326A
    • 1999-09-14
    • US812693
    • 1997-03-06
    • Takehiro NakamuraKouji OhnoEtsuhiro NakanoSeizo Onoe
    • Takehiro NakamuraKouji OhnoEtsuhiro NakanoSeizo Onoe
    • H04W48/12H04W48/20H04J13/02H04Q7/36
    • H04W48/20H04W48/12
    • A cell selection scheme in a CDMA mobile communication system which is capable of shortening the cell selection processing time while constructing a mobile communication system with a practically feasible base station configuration. In a CDMA mobile communication system, first type base stations which share a common reference timing are transmitting pilot channels spread by using an identical pilot channel spread code at mutually different spread code phases with respect to the common reference timing where these mutually different spread code phases are assigned to different first type base stations, and second type base stations which do not share the common reference timing are transmitting pilot channels spread by using mutually different pilot channel spread codes at arbitrary spread code phases where these mutually different pilot channel spread codes being assigned to different second type base stations. A mobile station receives these pilot channels and judges a located cell of the mobile station according to receiving levels, pilot channel spread codes and spread code phases of received pilot channels.
    • CDMA移动通信系统中的小区选择方案,其能够在构建具有实际可行的基站配置的移动通信系统的同时缩短小区选择处理时间。 在CDMA移动通信系统中,共享公共基准定时的第一类型基站相对于公共基准定时发送通过使用相同的导频信道扩展码扩展的导频信道,该相同的导频信道扩频码相互不同的扩频码相位 分配给不同的第一类型基站,并且不共享公共基准定时的第二类型基站通过使用相互不同的导频信道扩展码扩展的导频信道,该导频信道扩展码以任意扩频码相位分配,其中分配了相互不同的导频信道扩展码 到不同的第二类型基站。 移动台接收这些导频信道,根据接收到的导频信道的接收电平,导频信道扩频码和扩频码相位来判断移动台的定位小区。
    • 57. 发明申请
    • SIGNAL TRANSMISSION METHOD AND BASE STATION IN MOBILE COMMUNICATION
    • 信号传输方法和移动通信中的基站
    • US20090161539A1
    • 2009-06-25
    • US12333090
    • 2008-12-11
    • Shinji UebayashiSeizo OnoeMinami IshiiTakehiro Nakamura
    • Shinji UebayashiSeizo OnoeMinami IshiiTakehiro Nakamura
    • H04L12/26H04B7/216H04W88/08
    • H04W28/22H04W24/00H04W28/18H04W72/00H04W76/10H04W76/18H04W84/042
    • A signal transmission method checks, when detecting an occurrence of a communication request, whether the communication request is a high speed communication (step S302). In the case of the high speed communication, it checks whether the number of current high speed communications (m) plus one is greater than the upper limit (mmax) of the high speed communication (step S312). If greater, it cancels the request as a call loss (S316), and sets to a variable a the ratio (h) of the rate of the high speed communication to that of a low speed communication. If the communication request is the low speed communication, it sets one to the variable a (step S304). It compares n plus a with nmax (step S306), where n is the total number of all the current communications, a is the value associated with the communication request, and nmax is the upper limit of the number of communications acceptable in a bandwidth, all of which are expressed in terms of the number of the low speed communications. If n plus a is greater than nmax, the communication request is canceled as a call loss (S316). Otherwise, the total number of the current high speed communications (m) and the total number of all the current communications (n) expressed in terms of the number of the low speed communications are updated, and a channel is assigned to the communication request (step S310).
    • 当检测到通信请求的发生时,信号传输方法检查通信请求是否为高速通信(步骤S302)。 在高速通信的情况下,检查当前高速通信(m)加1的数量是否大于高速通信的上限(mmax)(步骤S312)。 如果较大,则将该请求作为呼叫损失取消(S316),并将高速通信的速率与低速通信的比率(h)设定为变量。 如果通信请求是低速通信,则将其设置为变量a(步骤S304)。 它将n加a与nmax进行比较(步骤S306),其中n是当前通信的总数,a是与通信请求相关联的值,nmax是带宽中可接受的通信数量的上限, 所有这些都以低速通信的数量表示。 如果n加a大于nmax,则通信请求作为呼叫丢失被取消(S316)。 否则,更新当前高速通信的总数(m)和以低速通信的数量表示的所有当前通信的总数(n),并且将通道分配给通信请求 步骤S310)。
    • 59. 发明授权
    • Control method of searching neighboring cells, mobile station, and mobile, communication system
    • 搜索邻近小区,移动台和移动通信系统的控制方法
    • US07437152B2
    • 2008-10-14
    • US10664662
    • 2003-09-18
    • Yoshihiro IshikawaSeizo OnoeKazufumi YunokiAkihiro Higashi
    • Yoshihiro IshikawaSeizo OnoeKazufumi YunokiAkihiro Higashi
    • H04Q7/20
    • H04W36/0083H04B1/70735H04B1/7083H04B2201/70702H04W48/16H04W48/20H04W52/0216Y02D70/164Y02D70/20Y02D70/40
    • A control method of searching for a neighboring cell of a mobile station communicating with a base-station is provided in a direct sequence CDMA mobile communication system which transmits information by carrying out double modulation using a first spreading code group and a second spreading code. The first spreading code group includes spreading codes that have a same repetition period as an information symbol period and are used in common by the base stations, and the second spreading code has a repetition period longer than the information symbol period. The base stations are assigned different second spreading codes. The control method stores at least one second spreading code and its phase into a first table, which second spreading code corresponds to a perch channel whose second spreading code and phase are known; stores a second spreading code used by a neighboring base station into a second table; searches for a perch channel whose second spreading code and phase are unknown; and searches for a perch channel whose second spreading code and phase are known. The neighboring cell search method can save the power consumption and time required for the mobile station to carry out the cell search with preventing an increase in the total cost of the system.
    • 在通过使用第一扩展码组和第二扩展码进行双调制来发送信息的直接序列CDMA移动通信系统中,提供了搜索与基站通信的移动站的相邻小区的控制方法。 第一扩展码组包括与信息符号周期具有相同重复周期的扩展码,并且由基站共同使用,并且第二扩展码具有比信息符号周期长的重复周期。 基站被分配不同的第二扩展码。 控制方法将至少一个第二扩展码及其相位存储在第一表中,该第二扩展码对应于其第二扩展码和相位已知的导频信道; 将相邻基站使用的第二扩展码存储到第二表中; 搜索其第二扩频码和相位未知的导频信道; 并搜索其第二扩展码和相位是已知的导频信道。 相邻小区搜索方法可以节省移动台执行小区搜索所需的功耗和时间,从而防止系统总成本的增加。
    • 60. 发明授权
    • Call admission control method, communication system and base station device
    • 呼叫接纳控制方法,通信系统和基站装置
    • US07120446B2
    • 2006-10-10
    • US10054992
    • 2002-01-25
    • Mikio IwamuraYoshihiro IshikawaSeizo OnoeTakehiro NakamuraTakahiro HayashiYoshiaki Ofuji
    • Mikio IwamuraYoshihiro IshikawaSeizo OnoeTakehiro NakamuraTakahiro HayashiYoshiaki Ofuji
    • H04Q7/20
    • H04W48/06H04W4/24H04W24/00H04W72/10
    • In resource measurement device 32, a measured value x of resource use condition is acquired in respect of the wireless resource to be monitored. Furthermore, in comparators 34 and 35, the measured value x is compared with the call admission threshold value xA of service A or with the call admission threshold value xB of service B, respectively. Comparison result selector 36 then selects one or other of the comparison results of comparators 34 and 35 in accordance with the type or degree of priority of the service of the call requested, identified by service identifier 33, and call admission control device 31 restricts new call admission in accordance with the selected comparison result. Thus, the call admission control method, communication system and base station device wherein deterioration of communication quality is suitably suppressed by call admission control in accordance with the service that is being utilized are provided in communication in which access is performed with shared resources.
    • 在资源测量装置32中,针对要监视的无线资源获取资源使用条件的测量值x。 此外,在比较器34和35中,将测量值x与服务A的呼叫准入阈值x A A A或服务的呼叫准入阈值x B B进行比较 B。 比较结果选择器36然后根据由服务标识符33识别的所请求的呼叫的服务的类型或程度来选择比较器34和35的比较结果中的一个或另一个,并且呼叫许可控制设备31限制新呼叫 按照选定的比较结果进行入场。 因此,在通过共享资源进行访问的通信中,提供通过根据正在使用的服务的呼叫许可控制来适当地抑制通信质量的恶化的呼叫许可控制方法,通信系统和基站装置。