May JulySeptember 2002doc.: IEEE 802.11-02/565r0
IEEE P802.11
Wireless LANs
Draft of 5 Criteria for
Radio Measurement4.9GHz - 5 GHz Operation in Japan
Date:JulySeptember 2002
Author:Richard H. PainePeter Ecclesine
The Boeing CompanyCisco Systems
IEEE 802 Five Criteria
1. BROAD MARKET POTENTIAL
a) Broad sets of applicability.
As more and more systems become mobile through the use of cellular systems and 802.11 WLANs, the requirement to know where the devices are, what radio coverage is like, and who is using them become imperative. In addition, as Voice Over IP (VOIP) becomes prevalent, the requirement to provide location for Enhanced 911 (E911) is mandatory. Also inherent in such systems as VOIP are the requirements for QoS. Without the information about ports, Access Points (APs), wireless link capabilities, radio signal strength, and signal to noise ratios, such QoS is not possible.The Japanese government has released radio spectrum in 4.9GHz and 5.0GHz to be used to expand broadband Internet connectivity.
August 6: Ministry of Public Management, Home Affairs, Posts and Telecommunications (MPHPT) announced results of invited comments on proposed partial amendments to
Frequency Assignment Plan for the introduction of 5GHz wirelessaccess system.
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As the result, the following policies have been decided;
- 4.9-5.0GHz bands can be allocated to new wireless access, such as 802.11a. Current licenses assigned for fixed micro wave systems will be valid until 2007.
- 5.03-5.091GHz band can be allocated to new wireless access until 2007 tentatively.
MPHPT announced the policies on August 7.
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There is no expectation that the WRC 2003 activity will result in changes in the rules for 4.9 GHz – 5.0 GHz operation in Japan.
b) Multiple vendors, numerous users.
In order for such requirements to be met, there is the need for information about the systems and their health. The information must be in a standard format and be defined in a common place and syntax for multiple vendors’ equipment to use the information.The opportunity in Japan is large, and current trials have more than one vendor’s radio equipment.
c) Balanced costs (LAN versus attached stations).
As the productivity of WLANs and wireless in general become prevalent, the management of devices becomes mandatory. No longer can fixed locations be counted upon and therefore the need for common data measurement and management based on that measurement.The changes to meet Japanese regulatory requirements will have no impact on the cost of clients versus access points. Japanese rules require that access points are licensed, while attached stations are not licensed.
2. COMPATIBILITY
The compatibility with IEEE 802 requirements will result in a standard that supplies radio information to all vendors in a standard way. Such a concept will stretch across all the 802.11 protocol specifications and be compatible with them all. Standardized radio measurement will enable all vendors to access information about the radios of other vendors. extends 802.11a to meet the National requirements of Japan’s 4.9GHz and 5GHz sub-bands.
3. DISTINCT IDENTITY
a) Substantially different from other 802 Projects
Although data measurement should have been a major priority, the need to communicate wirelessly came first. Now there is the need to catch up with standards-based radio measurement to make wireless LANs reliable, available, and maintainable.There are no other 802 Projects in the 4.9GHz band.
b) One unique solution per problem (not two solutions to a problem).
The PAR will define only one radio measurement methodology and therefore alleviate every vendor creating their own and being unable to access such information about other vendors’ equipment that may be intermixed.extension to 802.11a, such that laptops can be operated in 4.9GHz, 5.0 GHz as well as 5.15-5.25GHz.
c) Easy for document reader to select the relevant specification.
The radio measurement specification will be the only MIB/SNMP information in 802.11 and therefore easy for the document reader to select the appropriate specification.4.9GHz – 5GHz specification for operation in Japan will be the only one in 802.11.
4. TECHNICAL FEASIBILITY
a) Demonstrated system feasibility.
The 802.11 MIB is available today, but with no specification about how to use the information or how to get such information from WLAN equipment.
Preliminary proposals from Instant802 and others indicate the technical feasibility of creating access to the information.a equipment is in use in the 5.15GHz sub-band today with similar radio performance regulations.
b) Proven technology, reasonable testing.
The main components of technology of the radio measurement to be developed have precedents proving their feasibility.transmission and signalling are in use today.
Radio Technology: The existing IEEE 802.3 wired/fixed products already prove the technical feasibility of standardizing the wireless information.
5. ECONOMIC FEASIBILITY
a) Known cost factors, reliable data.
The fundamental radio architecture and baseband architecture of the WLAN is well known and measurements of the radio characteristics are done in a proprietary mean todayadding more subbands is a well understood process.
b) Reasonable cost for performance.
The primary cost trade-offs are cost vs. rate vs. range vs. multipath resistance and are dependent on knowledge of the network resources, i.e. WLAN radio measurement.The extension of 802.11a to cover the 4.9GHz – 5GHz sub-bands are similar to the cost to add 5.725GHz-5.825GHz capability to 802.11a 5.25GHz-5.35GHz radios.
c) Consideration of installation costs.
The installation cost of WLAN equipment will not change as a result of this amendment.
radio measurement equipmentSuch equipment is an integral part of the WLAN radio equipment.costs are part of providing coverage.
Submissionpage 1Richard H. Paine, BoeingPeter Ecclesine, Cisco Systems