By John C. Worsley, Joshua D. Drake, Command Prompt Inc
Arguably the main in a position to the entire open resource databases, PostgreSQL is an object-relational database administration method first constructed in 1977 by way of the collage of California at Berkeley. even with its lengthy background, this powerful database suffers from a scarcity of easy-to-use documentation. sensible PostgreSQL fills that void with a fast moving advisor to deploy, configuration, and utilization. This entire new quantity exhibits you the way to assemble PostgreSQL from resource, create a database, and configure PostgreSQL to simply accept client-server connections. It additionally covers the various complex positive factors, akin to transactions, versioning, replication, and referential integrity that allow builders and DBAs to exploit PostgreSQL for severe company functions. The thorough creation to PostgreSQL's PL/pgSQL programming language explains how one can use this very important yet under-documented characteristic to advance kept approaches and triggers. The ebook contains a entire command reference, and database directors will have fun with the chapters on person administration, database upkeep, and backup & restoration. With sensible PostgreSQL, you will find fast why this open resource database is the sort of nice open resource replacement to proprietary items from Oracle, IBM, and Microsoft. additionally integrated is a CD-ROM with Command Prompt's PostgreSQL program Server, LXP. The CD covers LXP model 0.8.0 and PostgreSQL model 7.1.3.
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They have broad applications in Internet access, emergency networks, public safety, and so forth. 5, and 3GPP LTE-advanced. IETF has also defined routing protocols for mobile ad hoc networks. 1 Emerging IEEE WLAN Standards The throughput of wireless LANs1 keeps increasing with advances in radio technologies. 11n standard2 is able to achieve up to 600 Mbps data rate when operating on 40 MHz bandwidth by using advanced physical layer techniques including MIMO and channel bonding. 11a/g radios. At the MAC layer, it is still based on carrier-sensing multiple access with collision avoidance (CSMA/CA) contention-based media access, called enhanced distributed channel access (EDCA) and polling-based content-free media access, called hybrid coordination function controlled channel access (HCCA).
18 At least one MSC in the traditional CS domain is enhanced with interworking functionality and a new interface Sv. The MME in the EPC also needs additional functionality to support the Sv interface and the associated single-radio voice call continuity procedure. Due to the make-before-break approach, the voice interruption in the handover procedure is normally less than several hundreds of milliseconds, which should be imperceptible to the user. However, it cannot be guaranteed that the QoS of the nonvoice session is sustained after the handover because of the bandwidth limitation in the UTRAN/GETRAN.
PMIPv6 provides a network-based mobility mechanism. The mobile access gateway (MAG), that is, the 3GPP S-GW or the non-3GPP mobile access gateway (A-GW) acts as the proxy/foreign agent for the UE and handles the mobility management signaling. Once the UE has changed its point of attachment to a new mobile access gateway, the new MAG provides the UE with the same IP address as the UE had at its previous point of attachment. The new MAG also handles updating the mobility anchor in the network so that the packets arrive at the new point of attachment.