LG LW1100AP User Manual

Wireless LAN Access Point User’s Guide

LW1100AP Series

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Contents

Chapter 1 Introduction To The Wireless LAN

1.1 What’s the Wireless LAN? …………………………………… 5

1.2 Wireless LAN Standard and Structure…………………………6

Chapter 2 Setup GoldStream Access Point …………………. 13

2.1 Before You Begin Installation ……………………………… ….13

2.2 Installing The LG LW1100AP Series Access Point …………………………………….15 Adjust the antennas …………………………………………15 Ethernet Cable Connection …………………………………16 Connect The Power Pack …………………………………..17 Connect Serial Cable ………………………………………..18 Open Terminal Program …………………………………….19 Configuration Change ……………………………………….21

2.3 Verifying the Operation of the LG Access Point ………. 28

Chapter 3 Access Point Management……………………….……..30

Access Point Connection. ……………………………………32 Access Point Configuration Window..……………………….33 Terminal Window for Diagnosis ……………………………..37 Firmware Upgrade Window ………………..………………..38 Firmware Upgrade Via Internet ……………………………..39 Firmware Upgrade Via Local Disk…………………………..41

3.2 Setting Bridge Mode …………………………………………… ..43

3.1 Starting a Configuration Tool………………………………………31

Access Point Detail Control ………………………………….42

Chapter 4 Troubleshooting …………………………………………..45

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Appendix

Appendix A Cell Planning (Radio Range) ……………………………..46

Appendix B Technical Specification ……………………………………48

Appendix C Channel Allocation ……………………………..………….50

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THE SPECIFICATIONS AND INFORMATION REGARDING THE PRODUCTS IN THIS MANUAL ARE SUBJECT TO CHANGE WITHOUT

NOTICE. ALL STATEMENTS, INFORMATION, AND RECOMMENDATIONS IN THIS MANUAL ARE BELIEVED TO BE ACCURATE BUT

ARE PRESENTED WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED. USERS MUST TAKE FULL RESPONSIBILITY FOR

THEIR APPLICATION OF ANY PRODUCTS.

THE SOFTWARE LICENSE AND LIMITED WARRANTY FOR THE ACCOMPANYING PRODUCT ARE SET FORTH IN THE

INFORMATION PACKET THAT SHIPPED WITH THE PRODUCT AND ARE INCORPORATED HEREIN BY THIS REFERENCE. IF YOU

ARE UNABLE TO LOCATE THE SOFTWARE LICENSE OR LIMITED WARRANTY, CONTACT YOUR LG REPRESENTATIVE FOR A

COPY.

The following information is for FCC compliance of Class A devices: This equipment has been tested and found to comply with the limits for

a Class A digital device, pursuant to part 15 of the FCC rules. These limits are designed to provide reasonable protection against harmful

interference when the equipment is operated in a commercial environment. This equipment generates, uses, and can radiate radio-

frequency energy and, if not installed and used in accordance with the instruction manual, may cause harmful interference to radio

communications. Operation of this equipment in a residential area is likely to cause harmful interference, in which case users will be

required to correct the interference at their own expense.

The following information is for FCC compliance of Class B devices: The equipment described in this manual generates and may radiate

radio-frequency energy. If it is not installed in accordance with LG’s installation instructions, it may cause interference with radio and

television reception. This equipment has been tested and found to comply with the limits for a Class B digital device in accordance with the

specifications in part 15 of the FCC rules. These specifications are designed to provide reasonable protection against such interference in a

residential insta llation. However, there is no guarantee that interference will not occur in a particular installation.

Modifying the equipment without LG’s written authorization may result in the equipment no longer complying with FCC requirements for

Class A or Class B digital devices. In that event, your right to use the equipment may be limited by FCC regulations, and you may be

required to correct any interference to radio or television communications at your own expense.

You can determine whether your equipment is causing interference by turning it off. If the interference stops, the LG equipment or one of its

peripheral devices probably caused it. If the equipment causes interference to radio or television reception, try to correct the interference by

using one or more of the following measures:

• Turn the television or radio antenna until the interference stops.

• Move the equipment to one side or the other of the television or radio.

• Move the equipment farther away from the television or radio.

• Plug the equipment into an outlet that is on a different circuit from the television or radio. (That is, make certain the equipment and the

television or radios are on circuits controlled by different circuit breakers or fuses.)

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Modifications to this product not authorized by LG Electronics Inc. could void the FCC approval and negate your authority to operate the

product.

FCC RF Radiation Expo sure Statement

This equipment complies with FCC RF radiation exposure limits set forth for an uncontrolled environment. This equipment should be

installed and operated with a minimum distance of 20 centimeters between the radiator and your body.

Important Note :

LW1100AP Antenna type is unique reverse turn SMA connector, Use only the supplied antenna.

Unauthorized antennas, modifications, or attachments could damage the transmitter and may violate FCC regulations.

NOTWITHSTANDING ANY OTHER WARRANTY HEREIN, ALL DOCUMENT FILES AND SOFTWARE OF THESE SUPPLIERS ARE

PROVIDED “AS IS” WITH ALL FAULTS. LG AND THE ABOVE -NAMED SUPPLIERS DISCLAIM ALL WARRANTIES, EXPRESSED OR

IMPLIED, INCLUDING, WITHOUT LIMITATION, THOSE OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND

NONINFRINGEMENT OR ARISING FROM A COURSE OF DEALING, USAGE, OR TRADE PRACTICE.

IN NO EVENT SHALL LG OR ITS SUPPLIERS BE LIABLE FOR ANY INDIRECT, SPECIAL, CONSEQUENTIAL, OR INCIDENTAL

DAMAGES, INCLUDING, WITHOUT LIMITATION, LOST PROFITS OR LOSS OR DAMAGE TO DATA ARISING OUT OF THE USE OR

INABILITY TO USE THIS MANUAL, EVEN IF LG OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH

DAMAGES.

LG LW1100AP, LG logo are registered trademarks of LG Electronics Inc. or its affiliates in the Korea, U.S. and certain other countries. All

other trademarks mentioned in this document are the property of their r espective owners. The use of the word partner does not imply a

partnership relationship between LG and any of its resellers.

T he LG Access Point User ’s Guide

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Chapter 1 Introduction To The Wireless LAN

A wireless LAN (WLAN) is a flexible data communication system implemented as an extension to, or as an a lternative for, a wired LAN within a building or campus. Using electromagnetic waves, WLANs transmit and receive data over the air, minimizing the need for wired connections. Thus, WLANs combine data connectivity with user mobility, and, through simplified configuration, enable movable LANs. WLANs have gained strong popularity in a number of vertical markets, including the health-care, retail, manufacturing, warehousing, and academic arenas. These industries have profited from the productivity gains of using hand-held terminals and notebook computers to transmit real-time information to centralized hosts for processing. Today WLANs are becoming more widely recognized as a general-purpose connectivity alternative for a broad range of business customers.

1.1 What’s Wireless LAN?

Wireless LANs use electromagnetic airwaves (radio and infrared) to communicate information from one point to another without relying on any physical connection. Radio waves are often referred to as radio carriers because they simply perform the function of delivering energy to a remote receiver. The data being transmitted is superimposed on the radio carrier so that it can be accurately extracted at the receiving end. This is generally referred to as modulation of the carrier by the information being transmitted. Once data is superimposed (modulated) onto the radio carrier, the radio signal occupies more than a single frequency, since the frequency or bit rate of the modulating information adds to the carrier. Multiple radio carriers can exist in the same space at the same time without interfering with each other if the radio waves are transmitted on different radio frequencies. To extract data, a radio receiver tunes in (or selects) one radio frequency while rejecting all other radio signals on different frequencies. In a typical WLAN configuration, a transmitter/receiver (transceiver) device, called an access point, connects to the wired network from a fixed location using standard Ethernet cable. At a minimum, the access point receives, buffers, and transmits data between the WLAN and the wired network infrastructure. A single access point can support a small group of users and can function within a range of less than one hundred to several hundred feet. The access point (or the antenna attached to the access point)

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is usually mounted high but may be mounted essentially anywhere that is practical as long as the desired radio cover age is obtained. End users access the WLAN through wireless LAN adapters, which are implemented as PC cards in notebook computers, or use PCI adapters in desktop computers. WLAN adapters provide an interface between the client network operating system (NOS) and the airwaves (via an antenna). The nature of the wireless connection is transparent to the NOS.

1.2 Wireless LAN Standard and Structure

Wireless LAN Standard – IEEE802.11b The widespread acceptance of WLANs depends on industry standardization to ensure product compatibility and reliability among the various manufacturers. The Institute of Electrical and Electronics Engineers (IEEE) ratified the original 802.11 specifications in 1997 as the standard for wireless LANs. That version of 802.11 provid es for 1 Mbps and 2 Mbps data rates and a set of fundamental signaling methods and other services. The most critical issue affecting WLAN demand has been limited throughput. The data rates supported by the original 802.11 standard are too slow to support most general business requirements and have slowed adoption of WLANs. Recognizing the critical need to support higher data-transmission rates, the IEEE recently ratified the 802.11b standard (also known as 802.11 High Rate) for transmissions of up to 11 Mbp s. With 802.11b, WLANs will be able to achieve wireless performance and throughput comparable to wired Ethernet. Outside of the standards bodies, wireless industry leaders have united to form the Wire-less Ethernet Compatibility Alliance (WECA). WECA’s mission is to certify cross-vendor interoperability and compatibility of IEEE

802.11b wireless networking products and to promote that standard for the enterprise, the small business, and the home. Members include WLAN semiconductor manufacturers, WLAN providers, computer system vendors, and software makers.

¦ Wireless LAN Network Equipment

802.11 defines two pieces of equipment, a wireless station, which is usually a PC equipped with a wireless network interface card (NIC), and an access point (AP), which acts as a bridge between the wireless and wired networks. An access point usually consists of a radio, a wired network interface (e.g., 802.3), and bridging software conforming to the 802.1d bridging standard. The access point acts as the base station

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for the wireless network, aggregating access for multiple wireless stations onto the wired network. Wireless end stations can be 802.11 PC Card, PCI.

¦ Wireless LAN Network Configuration

The 802.11 standard define two modes: infrastructure mode and ad hoc mode (or independent or peer-to-peer) .

l Ad Hoc Mode

Ad hoc mode (also called peer-to-peer mode or an Independent Basic Service Set, or IBSS) is simply a set of 802.11 wireless stations that communicate directly with one another without using an access point or any connection to a wired network. This mode is useful for quickly and easily setting up a wireless network anywhere that a wireless infrastructure does not exist or is not required for services, such as a hotel room, convention center, or airport, or where access to the wired network is barred (such as for consultants at a client site).

Independent Basic Service Set (IBSS)

Figure 1. Ad Hoc Mode

Infrastructure Mode

In infrastructure mode, the wireless network consists of at least one access point connected to the wired network infrastructure and a set of wireless end stations. This configuration is called a Basic Service Set (BSS ). An Extended Service Set (ESS) is a set of two or more BSSs forming a single sub-network.

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Since most corporate WLANs require access to the wired LAN for services (file servers, printers, Inter-net links) they will operate in infrastructure mode.

Distribution System (DS)

Ethernet (802.3)

Access Point (AP)

Service Set (SS) – Multiple

Figure 2. Infrastructure Mode

¦ Roaming

Wireless communication is limited by how far signals carry for given power output. WLANs use cells, called microcells, similar to the cellular telephone system to extend the range of wireless connectivity. At any point in time, a mobile PC equipped with a WLAN adapter is associated with a single access point and its microcell, or area of coverage. Individual microcells overlap to allow continuous communication within wired network. They handle low power signals and “hand off” users as they roam through a given geographic area.

The 802.11 MAC layer is responsible for how a client associates with an access point. When an 802.11 client enters the range of one or more APs, it chooses an access point to associate with (also called joining a Basic Service Set), based on signal strength and observed packet error rates. Once accepted by the access point, the client tunes to the radio channel to which the access point is set. Periodically it surveys all 802.11 channels

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in order to assess whether a different access point would provide it with better performance characteristics. If it determines that this is the case, it reassociates with the new access point, tuning to the radio channel to which that access point is set. Reassociation usually occurs because the wireless station has physically moved away from the original access point, causing the signal to weaken. In other cases, Reassociation occurs due to a change in radio characteristics in the building, or due simply to high network traffic on the original access point. In the latter case this function is known as “load balancing,” since its primary function is to distribute the total WLAN load most efficiently across the available wireless infrastructure. This process of dynamically associating and reassociating with APs allows network managers to set up WLANs with very broad coverage by creating a series of overlapping 802.11b cells throughout a building or across a campus. To be successful, the IT manager ideally will employ “channel reuse,” taking care to set up each access point on an 802.11 DSSS channel that does not overlap with a channel used by a neighboring access point.

Backbone Network

Access Point (AP)

Inter-Cell Roaming

Figure 3. Roaming

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BSS, ESS and SS ID

The basic service set (BSS) is the basic building block of WLAN network. Minimum WLAN BSS may be consist of only two stations. Using access point (AP) and network distribution systems (DS), WLAN service set can be extended arbitrary size – extended service set (ESS). Each service set has its network ID (SSID). All the service sets within an ESS network can have same service ID so that the ESS can support inter-cell ROAMING.

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Backbone Network

AP #`1 SS ID

= LG

ESS

BSS

AP #`2 SS ID

= LG

ROAMING

Re-Configuration Required

AP #`3 SSID

=LWAP

Backbone Network

Figure 4. SSID and Roaming

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Chapter 2 Setup LG Access Point

2.1 Before You Begin Installation

The LG LW1100AP Series Access Point is a wireless LAN transceiver that can act as the center point of a stand-alone wireless LAN network or as the connection point between wireless and wired networks. In multiple installations, the roaming functionality provided by multiple Access Points allows wireless users to move freely throughout the facility while maintaining seamless, uninterrupted access to the network. The Access Point supports Access Point management software. The system settings are contained on the Access Point's firmware.

Before setting up your Access Point, ask your network system administrator for the following information:

— If your network does not use a DHCP server, you need an IP (Internet Protocol)

address for the Access Point. If your network uses a DHCP server, an IP address will be assigned automatically. Each station or device on your network must have a unique IP address.

—

If there is some Access Points are already installed, SSID and channel allocation

strategy.

— WEP key allocation

Caution

You should configure the Access Point before mounting it on a pole or a ceiling. Some configuration steps, such as communicating with the Access Point through a serial cable, may be difficult if the Access Point is inaccessible.

Before you begin installation, make sure that you have the following items:

—

The LG LW1100AP Series Access Point

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—

The Access Point power s upply

— The LG LW1100AP Series Installation CD

If any of these items are missing from the package, contact your Access Point supplier. You will also need:

—

A computer that is connected to the same network as the Access Point

— A 9-pin, straight-through, male-to-female serial cable

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2.2 Installing The LG LW1100AP Series Access Point

Follow the instructions below to install the Access Point.

STEP 1 Adjust the antennas

For maximum range, make sure the antennas on your Access Point straight up or straight down, no matter where your Access Point is mounted. If you keep your Access Point on a table or a desk, turn the antennas so they point straight up. If you mount your Access Point on a wall or a pole, turn the antennas so they are vertical, even though the Access Point is on its side. If you mount your Access Point on the ceiling, turn the antennas so they point straight down.

Antenna configurations can be varied depending on the Access Point model, cell coverage or cell plan.

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