Frequencies — 2.4 GHz/3.5GHz
	Data rate — 3 and 4 Mbps / radio
	High effective throughput of up to 80%
	Service-on-Demand
	Sophisticated multiple access system to reduce congestion and increase throughput
	Sophisticated QoS implementation
	Comprehensive network management

	Compact outdoor units containing all electronics, antenna and RF
	Range of indoor subscriber units — Data only/Data and telephony
	Up to 24 radio units per base station
	Industry standard interfaces — 10BaseT/100BaseT

 

 

WipLL General System Description

 

WipLL is a wireless communications system capable of supporting voice, data and video services. WipLL consists of the following components:

	Radio Link, consisting of air-protocol, Outdoor Unit (ODU) at the base-station, and End-Point Unit (EPU) at the subscriber premises.
	Commercial router
	IP-Gateway and IP-Gatekeeper.

The heart of the WipLL system contains Frequency Hopping Spread Spectrum digital radios, and an air-protocol supporting Bandwidth-on-Demand (BoD) and Time Bounded Services (TBS). Each outdoor radio contains an internal high gain antenna. Radio’s software controlled transmitted power is up to 4 Watts EIRP, enabling to reach distances of up to 25 km without costly external power amplifier.

Each base-station can have many radios connected via Ethernet 10BaseT cable to a standard router. One WipLL base-station may have as many as 16 radios connected to the standard router, providing as much as 64 Mbps capacity to be shared among the users. A commercial IP-gateway is also connected to the router on one end, and to the PSTN on the other end. This IP-gateway processes PSTN signals, which are converted in the gateway to IP addressed packets, which are fed into the router. The gatekeeper performs the functions of: Call Processing, Echo Cancellation and the telephony part of the Network Management. On the subscriber side, the End-Point radio connects to an indoor unit containing a standard IP-telephone interface unit and an Ethernet interface.

The system transmits data at high speeds: basic speed allocated to a single user may be as much as 3Mbps in the US, or 4 Mbps outside the US. The system supports a variety of network topologies: point-to-point, point-to-multipoint, multipoint-to-multipoint, clusters of users (LANs, or PBXs), and single users. Bridging and routing functions are supported in many of these topologies, either by external router, or by the WipLL bridging and routing software

The air traffic is managed by RDC’s proprietary protocol which enables packetized transmissions, in uncommitted directions, while maintaining high data throughput under changing channel conditions and for various packet sizes. The protocol is transmitting packets in accordance with priorities based on the applications they belong to, thus ensuring arrival of packets within the time boundaries required by the corresponding application (Quality of Service feature).

The radio at the client’s end, the outdoor End-Point User (EPU), is of the same hardware units as the base-station radios in addition to the IP-telephony interfaces at the indoor unit. This radio provides a direct Ethernet connection to a LAN, or to the client’s computer, and to the telephone

 

 

Unique WipLL features

WipLL has a number of unique features in which the product excels over its competitors:

 

	Integrated Services on a single platform and with single protocol: telephony, data and multimedia.
	Quality of Service (QoS).
	Very high spectrum utilisation
	Very efficient frequency reuse in a multi-cell environment, due to proprietary Dynamic Channel Allocation (DCA) algorithms
	Toll quality (copper equivalent) telephony and voice band data
	Full support of various networking functionality and topologies: point-to-point, point-to-multipoint, bridging, routing
	Ability to operate many radios in one location (increases base-station capacity and saves site installation and maintenance costs)
	Comprehensive Network Management system. Multiple choice of installation and field survey tools including planning tools for base-station’s location
	High performance radio circuitry design with up to 1 Watt transmission power, capable of low cost production
	Easy extension of wired system
	Compatibility with leading brands
	Scalability

 

 

 

WipLL Specification

 

Parameter	Value	Comments
Data Channel
Cell Data Rate	1,2,3,4 Mbps	BER and Distance Dependent
Access Point Raw Data Rate	24 – 64 Mbps	Depends upon country regulations
TCP/IP Compression	1.8 :1	Ziv-Lampel Method
Effective Throughput (typ.)	80 %	at BER = 10-5
Communication Range	6-25 km	Rate and Regulation dependent
Network Management System	HPOV + Solaris, support MIB II, IP MIB and bridge MIB, in addition to the private MIB.
Telephony
Voice	PCM-Toll Qual.
Voice Band Data	up to 53 Kbps	Modems
PSTN Interface	E1(V5.2,CAS,.) T1(TR008,303)
Backup Battery	4 hours
Delay (Typical)	< 30 msec	Short “time to live”
Echo Cancellation	Up to 160 msec
Radio
Frequency Range	2.4-2.48 GHz	FCC/Part 15- Unlicensed, other frequencies will be available
Information Bandwidth	1 MHz
Error Correction	ARQ	and turbo-codes
MODEM	8 level FSK
Spectral Performance	By FCC/Part 15	At Present
Physical Characteristics
Dimensions	302x196x67 mm
Environmental	-30oC to 75oC