HLR vs VLR
HOME位置寄存器(HLR)和访问者位置寄存器(VLR)是根据GSM架构包含移动订户信息的数据库。通常,每个移动网络运营商有一个中央HLR,每个移动服务切换中心(MSC)都有一个VLR,但根据不同的供应商实现,这可能会有所不同。HLR和VLR的容量可以直接影响移动网络运营商的订户容量。
HLR
HLR包含移动网络中每个订户(MSISDN号)的条目。大多数HLR包含有关订户的静态和永久信息。对于示例订户状态,服务订阅(语音,数据,SMS等),补充服务,权限等。除了此静态信息之外,它具有临时信息,例如当前VLR号和MSC编号。HLR是在相应移动运营商网络中路由呼叫的中心位置。关于订户的大多数行政活动都受到HLR的控制和集中。在大多数供应商实施中,身份验证中心(GSM架构中的另一个元素)都集成到HLR,以提供更有效和有效的移动网络设计。在这种情况下,HLR也包含身份验证信息。
vlr
VLR数据库包含数据的一部分vailable in the HLR and other dynamic information about the mobile stations’ currently roaming in the administrative areas of the associated VLR. Data in the VLR are more dynamic than the other because of the mobility nature of the mobile stations. When a mobile station moves from one Location Area to another their information is updated in the VLR, so as to locate the mobile stations. When a subscriber moves out to new VLR area then HLR inform the old VLR to remove the information related to the given subscriber. Interface between HLR and VLR is called as D-Interface as per the GSM standard which help to share information between nodes. Information about location such as LAI (Location Area Information), attached status and Temporary Mobile Subscriber Identity (TMSI) are stored in the VLR. Also some of the authentication information is passed from HLR to VLR for the authentication requirements.
HLR和VLR有什么区别?
HLRand VLR have their own functionality within the GSM architecture. There is also a communication interface between HLR and VLR as per the GSM architecture. Number of communications take place within HLR and VLR nodes to share their information. For an example when one subscriber move from one VLR area to another area their locations are updated in the VLR and new VLR information is updated in the HLR. But if a subscriber moves within the same VLR area no such interaction with the HLR is needed.
HLR和VLR都按照GSM架构存储订户信息,以向网络中注册的订户提供移动通信服务。通常,HLR包含有关网络中所有订户的信息,而VLR包含与VLR区域内漫游的订户相关的更多动态信息。这可能会根据网络架构设计而有所不同,因为在大多数情况下,HLR作为集中式节点的作用,而VLR大多是地理上的节点。HLR充当给定移动站(订户)的固定参考点,而他的VLR可以根据移动性和网络设计而变化。
即使HLR和VLR都作为同一移动网络中的数据库起作用,但在大多数设计中,VLR被分配有限的地理区域,以处理该区域内有关订户的所有动态数据,而HLR则作为更为集中的节点,以提供有关订阅者的更多静态信息在整个网络中。HLR处理网络中的订户管理活动,而VLR支持移动函数和有关订户的其他动态信息。
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