User's Manual Part 1
2 APCD-LM043-8.0 (DRAFT C)
1: Introduction
indoor diversity antenna and extended coverage to installations using external high-
gain antennas.The 900 MHz ISM band is more suited to NLOS (non-line of sight)
wireless Internet applications than other ISM bands because it has superior
propagation performance, demonstrating the following benefits:
• Lower free-space, cable and foliage loss
• Better wall and glass penetration
• More signal recovery from diffraction and reflection
• High-speed Channel: The LMS4000 900MHz Radio Network provides a raw channel
bit rate of 2.75Mbps, which translates to peak FTP rates of 2Mbps.
• High-performance Polling MAC: WaveRider’s patented Polling MAC algorithm takes
advantage of typical usage patterns found in Internet transactions, such as Web
browsing and email, to provide an operating capacity of up to 300 end users per RF
channel. Even with large numbers of subscribers, end users generally perceive that
they have the entire channel to themselves.
• Grade of Service Support: The Polling MAC supports up to four end-user grades of
service, which allows the system operator to segment service offerings for those users
that demand and are willing to pay for higher grades of service, and those that are
only willing to pay for a more basic grade of service.
• License-free Radio Bands: The main advantage of using the ISM band is that you
need not apply to the FCC or Industry Canada for an operating license. This freedom
reduces your time to market and the effort and high cost associated with obtaining a
license.
• Robust Hardware and Software: LMS4000 hardware and software have been
rigorously tested in lab and field environments. The hardware, which is mechanically
robust, works over a broad range of temperatures and operating conditions. The
software is equally robust and has been designed to recover automatically from
unplanned events and abnormal operating conditions.
• Simple End-user Modem Configuration: The end-user modem is very easy to
configure. Normally, operators pre-configure the EUM prior to field deployment, so
they can maintain control over their network.
• Simple End-user Modem Installation and Operation: It is very easy to install and
operate the EUM. So easy, in fact, that when the installation is based on the
WaveRider indoor diversity antenna, the end user should be able to install and
operate the modem with no involvement from the network operator. This simplicity
saves the network operator the cost and inconvenience of having to visit the end-
user’s premises. The EUM uses a standard Ethernet interface which means the EUM
and the antenna can be located up to 100meters from the end-user’s PC.
• Flexible Network Topology: The LMS4000 900MHz Radio Network has a flexible
topology, allowing it to line up with the operator’s existing Internet points of presence
and site facilities. As well, LMS4000 supports the following connections:
• Connection between the end-user modem and the Internet through the
network operator’s gateway router
• Direct connection between end-user modems through the LMS4000 900MHz
channel units (CCUs), if the CCU is configured to support this routing
• Connection between end-user modems on different, but co-located, CCUs if
these routes are configured in the CCU routing tables, if the CCU is
configured to support this routing