By Alessandro Andreadis
ISBN-10: 0306477955
ISBN-13: 9780306477959
ISBN-10: 1402073267
ISBN-13: 9781402073267
This helpful reference ebook specializes in the air interface of cellular networks at diversified layers in line with the OSI Reference version. It presents an outline of a number of instant verbal exchange structures in addition to cellular satellite tv for pc structures, by means of distinct research of radio source administration concerns.
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Example text
With this information the BSC decides to initiate handovers to other cells, to change the BTS transmission power, etc. 2 Network sub-system The Mobile Switching service Center (MSC) acts like a standard exchange of the Integrated Services Digital Network (ISDN) and additionally provides all the functionality needed to support user mobility. The main functions are: registration, authentication, location updating, handovers and call routing to a roaming subscriber. If the MSC has also interconnections towards other networks, it is called Gateway MSC (GMSC).
The throughput parameter defines the peak octet rate per minute and the mean octet rate per second measured at Gi and R interfaces. The following classification applies. Peak throughput class [24]: the peak throughput (Table 7) specifies the maximum rate at which data is expected to be transferred across the network for an individual session (= PDP context, as explained later). 36 Protocols for High-Efficiency Wireless Networks - Part I There is no guarantee that this peak rate can be achieved or sustained for any time period, this depends upon the MS capability and available radio resources.
44 Protocols for High-Efficiency Wireless Networks - Part I As GSM, GPRS supports SMS. Moreover, GPRS has two broad categories of bearer services: Point-to-Point (PTP) and Point-to-Multipoint (PTM). The forwarding process of PTM can be accomplished in two different ways. , sent to all receivers located in a geographical area, referred to as PTM-M (PTM-Multicast), IP-M (Internet Protocol Multicast) or forwarded to a predefined group (mainly independent of geographical location), referred to as PTM-G (PTM-Group).