System and method of conforming wireless devices to worldwide regulations
Countries or regions of the world can have different regulations governing wireless devices. A client product advantageously conforms to any regulatory environment, thereby allowing the client product to operate permissibly in any wireless network. The client product scans all frequencies at a predetermined interval for explicit information on regulation-conformant methods of operation, including frequencies and output power levels. If the client product receives a beacon, then the client product extracts relevant information from the beacon. Based on the relevant information, the client product operates in either the infrastructure mode or the ad hoc mode. On the other hand, if the client product does not receive explicit information, the client product detects other types of information and implicitly derives methods of operation in both infrastructure and ad hoc modes that conform to local regulations.
1. A method of conforming a wireless networking client product to a regulatory environment, the method comprising:
passively scanning all frequencies at a first interval for a beacon;
if receiving a beacon, then extracting relevant information from the beacon and operating in one of an infrastructure mode and an ad hoc mode based on the relevant information; and
if not receiving a beacon, then operating in the ad hoc mode at a frequency acceptable in substantially all regulatory environments, wherein if receiving the beacon, and the beacon is not an 802.11d beacon, then further including determining whether a regulatory domain can be inferred.
2. An automatic startup process for a client product, the process ensuring permissible operation in an unknown regulatory environment, the process comprising:
passively scanning all frequencies at a first interval for a beacon;
if an 802.11d beacon is found, wherein the 802.11d beacon indicates a regulatory domain, then determining whether the client product is set in one of an infrastructure mode and an ad hoc mode;
if set in the infrastructure mode, then associating in the infrastructure mode in a wireless network using the regulatory domain derived from the 802.11d beacon; and
if set in the ad hoc mode, then operating in the ad hoc mode in the wireless network using the regulatory domain derived from the 802.11d beacon, wherein if the 802.11d beacon is not found then
searching for any beacon;
if no beacon is found, then determining whether the client product is set in the infrastructure mode;
if the client product is not set in the infrastructure mode, then searching for an ad hoc beacon; and
if an ad hoc beacon is found, then associating in a common mode in the wireless network, the common mode referring to a maximum average output power level meeting substantially all regulatory environments.
3. The method of claim 2 , wherein the common mode includes one of 17 dBm for 5.15 GHz to 5.25 GHz, 20 dBm for 5.25 GHz to to 5.85 GHz, and 20 dBm for 2.40 to 2.50 GHz.
4. The method of claim 2 , wherein if an ad hoc beacon is not found, then initiating the ad hoc mode at a frequency acceptable in substantially all regulatory environments.
5. The method of claim 4 , wherein the usable frequency includes 2.457 GHz or Channel 10.
6. The method of claim 2 , wherein if a beacon is found, then
determining whether an implicit regulatory domain can be inferred from the beacon, wherein the implicit regulatory domain refers to one of a frequency on which an information element is received and a detected mode of operation corresponds to only one regulatory domain.
7. The method of claim 6 , wherein if an implicit regulatory domain is not provided, then returning to determining whether the client is set in the infrastructure mode.
8. The method of claim 6 , wherein if an implicit regulatory domain is provided, then
saving the regulatory domain;
if the client product is set in the infrastructure mode, then associating in the infrastructure mode in the wireless network based on the regulatory domain; and
if the client product is not set in the infrastructure mode, then returning to searching for an ad hoc beacon.
9. The method of claim 2 , wherein if the client product is set in the infrastructure mode, then
passively scanning all frequencies at a second interval, wherein the second interval is longer than the first interval.
10. The method of claim 9 , further including
determining whether an 802.11d beacon is found using the second time interval;
if the 802.11d beacon is found, then associating in the infrastructure mode in the wireless network using a regulatory domain derived from the 802.11d beacon.
11. The method of claim 10 , further including
if the 802.11d beacon is not found, then searching for any beacon;
if a beacon is not found, then starting an ad hoc mode at a frequency acceptable in substantially all regulatory environments.
12. The method of claim 11 , further including
if a beacon is found, then determining whether a regulatory domain can be inferred from the beacon.
13. The method of claim 12 , further including
if an implicit regulatory domain is provided, then saving the regulatory domain; and
associating in the infrastructure mode in the wireless network using the regulatory domain.
14. The method of claim 12 , further including
if an implicit regulatory domain is not provided, then associating in the infrastructure mode in the common mode.
15. A wireless device operational in an unknown regulatory environment, the wireless device including software for performing the following steps:
passively scanning all frequencies at a first interval for a beacon;
if receiving a beacon, then extracting relevant information from the beacon and operating in one of an infrastructure mode and an ad hoc mode based on the relevant information; and
if not receiving a beacon, then operating in the ad hoc mode at a frequency acceptable in substantially all regulatory environments, wherein if receiving the beacon, and the beacon is not an 802.11d beacon, then further including determining whether an implicit regulatory domain can be interred.
16. Software for ensuring permissible operation of a wireless device in an unknown regulatory environment, the software comprising:
code for passively scanning all frequencies at a first interval for a beacon;
code, if receiving a beacon, for extracting relevant information from the beacon and operating in one of an infrastructure mode and an ad hoc mode based on the relevant information;
code, if not receiving a beacon, for operating in the ad hoc mode at a usable frequency in substantially all regulatory environments; and
code, if receiving a non-802.11d beacon, for determining whether a regulatory domain can be inferred.
17. A method for conforming a client product to a regulatory environment, the client product having finished its initial startup, the method comprising:
determining whether a regulatory domain is set;
if the regulatory domain is set, then using the regulatory domain and an associated conformance test limit as a temporary setting;
determining whether an active scan is permissible in the regulatory domain;
if permissible, then actively scanning in the regulatory domain;
if not permissible, then passively scanning in the regulatory domain;
based on the scanning, determining whether any beacon is detected;
if a beacon is detected, then resetting the regulatory domain if different and converting the temporary setting into a confirmed setting;
if no beacon is detected, then passively scanning foreign domains until a beacon is detected; and
associating in a wireless network based on the regulatory domain in the confirmed setting.