IPv6• IPv4 32 bits = 4,294,967,296 possible addressable devices• IPv6 128 bits: 4 times the size in bits = 3.4 x 10^38 possible addressable devices• 5 x 1028 addresses per person on the planet• IPv6 Address Format X:X:X:X:X:X:X:X where X = 0000 ... FFFF (hex)• More addresses than current version of IP protocol (Version 4)• Each device can have own IP• Keep IP address even if you change access point• Presently translate IP with each change because not enough IP addresses to go around
IPv6 Technology Features and Benefits• Larger number of addresses : IPv6 has 128-bit addresses, compared to 32 bits for IPv4 addresses. This results in a very large increase in the number of IP addresses available .• End-to-end connectivity : IPv4 needed NAT in certain situations in order to conserve scarce IP addresses. Unfortunately, NAT does not work well with peer-to- peer applications such as VoIP. IPv6 eliminates the need for NAT and thus, restores end-to-end connectivity.• Auto-configuration : IPv6 provides auto-configuration of IP addresses on IPv6- enabled devices. This greatly improves scalability and manageability of networks. New devices can be connected directly to the network without manually configuring IP addresses .• Mobility and multicast enhancements : IPv6 provides further enhancements for mobile IPv6, which helps with today’s wireless networks. The addition of scope field for multicast has improved the framework for multicast traffic.
Smart Antennas Multiple “smart antennas” can be employed to help find, tune, and turn up signal information.There are two types of smart antennas:Switched Beam Antennas have fixed beams of transmission, andcan switch from one predefined beam to another when the user with the phone moves throughout the sectorAdaptive Array Antennas represent the most advanced smart antenna approach to date using a variety of new signal processing algorithms to locate and track the user, minimize interference, and maximize intended signal reception.Smart antennas can thereby:• Optimize available power• Increase base station range and coverage• Reuse available spectrum• Increase bandwidth• Lengthen battery life of wireless devices Switched Beam Adaptive Array
Smart AntennasBeam radio signals directly at a user to follow the user as they move.
SOFTWARE DEFINED RADIO• A software defined radio is one that can be configured to any radio or frequency standard through the use of software.• Software Defined Radio (SDR) benefits from today’s high processing power to develop multi-band, multi-standard base stations and terminals.• For example, if one was a subscriber of Sprint and moved into an area where Sprint did not have service, but Cingular did, the phone would automatically switch from operating on a CDMA frequency to a TDMA frequency.• In addition, if a new standard were to be created, the phone would be able to support that new standard with a simple software update. With current phones, this is impossible.