The convergence of voice and data networks in a business environment takes a new turn with the advent of wireless networks. Offered the freedom of mobility for users in a wireless LAN is a significant increase in productivity, efficiency e. The morale of employees. Is no longer the labor force, their desk, connected as in the labor market. Employees can access business files and receive important communications from anywhere on the site, which is located within aWireless Access Point.
With voice communications thrown into the mix, mobile users can stay connected while roaming the property inside or outside, and even on the road. Acceptance of the concept of convergence of mobile telephones by the telecommunications industry only promises solid fire for the introduction of VoIP over Wi-Fi fuel.
The challenges of implementing VoIP over Wi-Fi
As with any new technology, there are challenges to overcome.Be the development of converged network, ie data and voice on same IP-based LAN, while still an established standard that proves an advantage for companies because of cost and productivity perspective. Add the prospect of VoIP on a wireless network creates a new set of questions.
VoIP is a time of sensitive technology. The calls must be established and authenticated, and voice packets must arrive at their destination without interruption and time. Thisrequires an almost continuous flow of the network, without interruption from less transmissions of sensitive data. The implementation of the quality of technical service to ensure the wired LAN that these voice packets get priority, and issues of quality, such as latency, jitter and packet loss have been sufficiently studied.
Enter the standards-based wireless network, a technology that occur at an early stage of development, and other challenges. While the cable network now offers a bandwidth forVoice and data coexist, WLAN offer less bandwidth and quality of service should be reconsidered. Security measures such as authentication and encryption must be implemented and aggravate the problem by increasing the size of voice packets. In addition, people who are moving to wireless access points where handoffs need to move quickly and smoothly.
The IEEE-802 standard for wireless technology are evolving rapidly and promise to deal with a wide range ofWiFi problems. Increase the available bandwidth, in order of priority of voice packets for QoS, authentication and encryption protocols for security and improved techniques for roaming are all addressed.
In developing the wireless technology commonly known as WiMax, which for the implementation of broadband wireless communications covering distances of up to 30 miles. The development of WiMax could be of great importance forDeveloping countries and metropolitan LANs.
Security in a VoIP network / WiFi
Companies must implement wVoIP consider safety issues from the outset. As with any IP network, the dangers of hackers, denial of service, kidnapping and spam, all lurk in the shadows.
Because a wireless network uses radio frequencies as a means of transmission, usually through a firewall security in a wired network is not sufficientbecause of physics. Considering that hackers break into a wired LAN requires both physically hacking into the network or via the Internet on a wireless network, you can grab on transfers from the sky, while parked on the street. Check the security issues that network managers need in a VoWLAN, the privacy of conversations and protection of network infrastructure.
It's for WiFi networks, the security of a rocky start with the implementation of WFP, itsSecurity mechanism. WEP provides for authentication and encryption between the user and the access point and found to be easily violated. The 802.11i standard as WPA2 (Wireless Protected Access adopted), it provides more security by way of two strong authentication between the user and the network uses AES (Advanced Encryption Standard) as the encryption engine.
As a network operator to introduce a VoIP wireless network planning, the largestSecurity threat it is facing, it is not properly implemented. building security into the design of the initial deployment, it can and must affect the network topology and cost of materials. By failing to do so could result in additional charges to a loss of services and redesign of the network for the case of a compromise.
Wi-Fi, VoIP and cellular networks
Manufacturers of mobile devices are integrating Wi-Fi radios in their mobile phones at a faster than ever. New Arrivalsmobile operating systems come complete with built in VoIP stack, calling the carriers and manufacturers of VoIP features to install on their devices. Dual-core and quad-band phones, you can switch between the stronger the network available to choose cellular or WiFi, and a call accordingly.
Since mobile phones are becoming more like mobile offices, the advantages of a mobile workforce significantly. In the case of road warriors the ability to communicate via e-mail, SMS, video orVoice, you can lose on the road more, remain without contact. In this age of instant information, the Mobile Office application files are downloaded, processed and made available, increasing the productivity of travelers at the point where almost anything can be done in the office, it can be done on the road.
A phone that the switch between cellular networks and Wi-Fi can significantly reduce telecommunications costs may be in the office. With Wi-Fi hotspots popping up onHotels, cafes and corporate LANs in the world, mobile workers can stay in touch with the office and the family, both inside and outside of work. With the addition of a provider of VoIP services, VoIP calls can be made more cheaply from any Wi-Fi network with a simple touch.
Imagine if you will, a future that may be a phone with a mobile phone fast and easy through the cellular networks, WiFi networks, cable and fixed line PSTN. Where the incidence of roaming and switch between different networks, without interruptionor loss of call quality. fixed-mobile convergence is the buzzword of the decade, and IP Multimedia Subsystem (IMS) is the standard, which promises us there.
The aim of IMS is to provide all the services and applications offered by the Internet, both current and yet unsuspected. IP-based services such as VoIP, push to talk (PoC), video conferencing, SMS, community services, the presenceInformation and file sharing are just some of the possibilities. Designed to work with any landline, mobile and wireless packet switched networking system to ensure compatibility with legacy circuit switched phone comes with the use of gateways are available.
Although still in its infancy, IMS is already being implemented by AT & T as a platform in its recent acquisition of the Cingular network. Interest in investing in new infrastructure, including mobile and fixed network operators have the top and bottom, asweigh the costs and benefits of new technologies.
As the technology of VoIP over Wi-Fi networks, further develop, companies of all sizes can reap the benefits of greater mobility, productivity and significant cost savings. Standards bodies are constantly working to improve safety and quality of services and fixed mobile convergence gains acceptance in the telecommunications sector, more choice in services and applications available IPCompanies will surely follow. What is also interesting to see how this application is very bandwidth-intensive networks carrier will be priced and how it affects the neutrality of the Internet.
ไม่มีความคิดเห็น:
แสดงความคิดเห็น