Service data point

Abstract: In the Global System for Mobile Communications (GSM) Phase 2+ development, one major activity is to specify the general packet radio service (GPRS). The standardization is expected to be completed at the end of 1997. The purpose of GPRSI like other packet data services, is to efficiently accommodate data sources that are bursty in nature. Another important goal of the technology is to make it possible for GSM license holders to share physical resources on a dynamic, flexible basis between packet data services and other GSM services. The authors present a detailed description of the GPRS system, emphasizing the radio link protocol, and demonstrate its performance. The performance measures have been obtained from the WINLAB GPRS simulator.

Abstract: From the Publisher: Covering system architecture, implementation, and testing, this book provides you with an overview of GSM specifications and surveys competing cellular systems such as NADC and CDMA. Practical testing applications are explored in depth and compared with similar techniques used with analog cellular systems.

Abstract: In an overlay Wireless Location System, an Abis interface is monitored to obtain information used to locate GSM phones (S116). Signaling links of the Abis interface are passively monitored to obtain certain information, such as control and traffic channel assignment, called number, and mobile identification, which is not available from the GSM air interface of the reverse channel (S110-S116). This approach also applies to IDEN and can be broadened to include CDMA systems where the GSM architecture has been used and the system includes a separated BTS to BSC interface.

Abstract: Location-blocking and identity-blocking services that can be commercially offered by a service promoter, e.g., a cellular service provider or a web advertiser. In the identity-blocking service, the service promoter may disclose the current physical location of a mobile subscriber (i.e., a cellular phone operator) to a third party (e.g., a web advertiser) subscribing to the identity-blocking service. However, the service promoter may not send any identity information for the mobile subscriber to the third party. On the other hand, in the location-blocking service, the service promoter may disclose the mobile subscriber's identity information to the third party, but not the current physical location of the mobile subscriber. Blocking of the mobile subscriber's identity or location information may be desirable for privacy reasons, to comply with a government regulation, or to implement a telecommunication service option selected by the mobile subscriber. However, in the case of the mobile subscriber requesting emergency help, the service promoter may not block identity and/or location information. Instead, the service promoter may send all such information to the emergency service provider (e.g., the police or a hospital).